CN113710350A - VOCs gas treatment device and method - Google Patents
VOCs gas treatment device and method Download PDFInfo
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- CN113710350A CN113710350A CN202080030899.5A CN202080030899A CN113710350A CN 113710350 A CN113710350 A CN 113710350A CN 202080030899 A CN202080030899 A CN 202080030899A CN 113710350 A CN113710350 A CN 113710350A
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D—SEPARATION
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- B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
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- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
- B03C3/016—Pretreatment of the gases prior to electrostatic precipitation by acoustic or electromagnetic energy, e.g. ultraviolet light
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Abstract
A VOCs gas treatment device and method, the VOCs gas treatment device comprises: an inlet, an outlet, and a flow channel between the inlet and the outlet; the device is characterized by further comprising an ultraviolet device (4) and an electric field device (5), wherein the ultraviolet device (4) and the electric field device (5) are sequentially arranged along the flow channel from the inlet to the outlet. The electric field device (5) comprises: an electric field device inlet (51), an electric field device outlet (52), an electric field cathode (4052) and an electric field anode (4051), the electric field cathode (4052) and the electric field anode (4051) being for generating an ionizing dust removal electric field. The electric field is used for removing dust, so that nano particles in a product after the gas is treated by UV irradiation are effectively removed, and secondary pollution is avoided.
Description
The invention belongs to the technical field of waste gas treatment, and particularly relates to a VOCs gas treatment device and method.
Volatile Organic Compounds (VOCs) are a very common pollutant species in indoor and outdoor environments, and mainly include hydrocarbons (alkanes, aromatics, olefins), and hydrocarbon derivatives (halogenated hydrocarbons, aldehydes, ketones, alcohols, N/S atom-containing structures), and the like. Automotive emissions, building materials and finishes, chemical and petrochemical exhaust gases, printing and coating processes, cooking fumes, etc., are considered to be the primary sources of gaseous VOCs in the environment.
VOCs can directly harm human bodies and influence human health conditions, and not only have stimulating effect on organs of systems such as human vision, smell, respiration and the like, but also have damage to organs such as heart, lung and the like and nervous systems. In addition, VOCs can react with other pollutants in the atmospheric environment, leading to local or global environmental problems, such as in sunlight (ultraviolet light), VOCs can react with NOx photochemically to form fine suspended particulate matter and photochemical smog, which can harm health and crop yield reduction.
In view of the fact that the sources of VOCs are more, the discharge amount is increased year by year, and the composition structure of VOCs is very complex, and developing a method for effectively reducing the discharge amount of VOCs is always a hotspot and a difficulty of industrial research. The discharge amount of VOCs in the atmosphere is reduced, and the discharge source can be controlled or the tail end of the discharge can be comprehensively treated.
For high concentrations of VOCs (greater than 5000 mg/m)3) The method is suitable for recycling, and comprises an adsorption method, an absorption method, a membrane separation method and the like, wherein the physical adsorption method is only to convert VOCs from a gaseous form into an adsorption state, the organic matters of the VOCs in the adsorption state need further treatment, and the adsorbent needs to be subjected to repeated regeneration processes.
The medium and low concentration VOCs are usually controlled by molecular degradation technology, mainly including catalytic combustion method, photocatalytic method, low temperature plasma method, photodecomposition method, photocatalytic oxidation method, etc. Among them, the catalytic combustion technology is limited by the high price of metal catalysts, excessive energy consumption, catalyst poisoning and deactivation, and the flammable and explosive properties of VOCs at high temperatures. The photocatalytic oxidation technology is a method capable of realizing the decomposition of low-concentration VOCs at room temperature, is considered as a promising treatment process, but is also limited by the inactivation of the catalyst, the regeneration of holes by electrons and the like, and meanwhile, the photocatalytic oxidation technology can achieve higher VOCs removal efficiency at the beginning of the reaction, but photocatalytic oxidation intermediate deposits are formed on the surface of the photocatalyst in the reaction process, so that the catalytic activity of the photocatalyst is reduced.
The technology of Ultraviolet (UV) degradation of VOCs is a simple method for eliminating VOCs, and meanwhile, the UV degradation technology does not use a catalyst, so that the cost and operability are low, and the attention of the industry is attracted. There are two reaction pathways for UV light degradation of VOCs: one reaction pathway is photolysis, also called photodissociation, where the typical technology is UV lamp, because the photon energy of short wavelength UV is higher than the bond energy of the chemical bond inside most pollutant molecules, the 185nm wavelength UV light emitted by UV lamp, which has higher energy (6.7eV), can be used to destroy and decompose the chemical bond structure of various VOCs, including the more difficult-to-process organic molecular structure of benzene, toluene, xylene, etc.; another reaction route is the photooxidation reaction, ultraviolet light of 185nm wavelengthLight, which generates high energy photons that can activate O2And H2O water vapor molecule, generating a large amount of active free radicals with strong oxidizing property, such as O (1D), O (3P), hydroxyl free radical (OH), O3And the like, so that VOCs molecules and newly generated intermediate small molecules can be continuously oxidized and decomposed, and the effect of reducing the concentration of pollutants is achieved.
In practical engineering cases, it is found that in the process of treating VOCs by adopting UV photolysis technology, photodegradation and photopolymerization reaction occur simultaneously, and the photodegradation can generate harmless CO2And H2And O, the product of the photopolymerization reaction is a high-molecular polymer and is represented as dust particles (organic solid particles with large molecular weight), and the direct discharge can cause secondary pollution to the environment. However, in the existing process route for treating the VOCs by using the photolysis technology, only the concentration change of the VOCs is detected, the particulate product of the polymerization reaction is not considered, the particulate is used as a product of the photolysis technology, and if the particulate is not trapped and collected, the particulate is discharged into the atmosphere, so that the dust harm to the environment is caused.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a method and apparatus for treating a gas containing VOCs to solve the problem of particles, more particularly nanoparticles, generated during the treatment of the gas containing VOCs using ultraviolet technology.
The inventor of the present application finds new problems in the technology of ultraviolet treatment of gas containing VOCs through research and finds corresponding technical means to solve the problems. For example, the inventors of the present application have found that the product of UV irradiation treatment of a gas containing VOCs contains nanoparticles, particularly particles below 50nm, and particularly particles around 23nm, and therefore, it is necessary to perform an operation of removing nanoparticles before discharging the gas into the air. In addition, the present inventors found that the electric field dedusting system invented by them can effectively remove nanoparticles, especially particles below 50nm, from the product after UV treatment of VOCs gas, and avoid secondary pollution, thus solving the technical problems not recognized by those skilled in the art and achieving unexpected technical effects.
In order to achieve the above objects and other related objects, the present invention provides the following technical solutions:
1. example 1 provided by the present invention: a VOCs gas treatment apparatus comprising:
an inlet, an outlet, and a flow channel between the inlet and the outlet;
the ultraviolet device and the electric field device are sequentially arranged along the flow channel from the inlet to the outlet.
2. Example 2 provided by the invention: including example 1 above, wherein the ultraviolet device comprises at least one ultraviolet lamp.
3. Example 3 provided by the present invention: including the above example 1 or 2, wherein the ultraviolet light provided by the ultraviolet lamp is single-peak ultraviolet light or dual-peak ultraviolet light.
4. Example 4 provided by the present invention: including any one of the above examples 1-3, wherein the ultraviolet lamp provides a single peak ultraviolet light having a main peak at 253.7nm or 185 nm.
5. Example 5 provided by the present invention: including any one of the above examples 1-4, wherein the ultraviolet lamp provides twin-peak ultraviolet light having dominant peaks of 253.7nm and 185nm, respectively.
6. Example 6 provided by the present invention: including any one of the above examples 1-5, wherein the electric field device comprises: the electric field device comprises an electric field device inlet, an electric field device outlet, an electric field cathode and an electric field anode, wherein the electric field cathode and the electric field anode are used for generating an ionization dust removal electric field.
7. Example 7 provided by the present invention: including example 6 above, wherein the field anode comprises a first anode portion and a second anode portion, the first anode portion being proximate the field device inlet and the second anode portion being proximate the field device outlet, at least one cathode support plate being disposed between the first anode portion and the second anode portion.
8. Example 8 provided by the invention: including the above example 7, wherein the electric field device further includes an insulating mechanism for achieving insulation between the cathode support plate and the electric field anode.
9. Example 9 provided by the present invention: the method includes the above example 8, wherein an electric field flow channel is formed between the electric field anode and the electric field cathode, and the insulating mechanism is disposed outside the electric field flow channel.
10. Example 10 provided by the invention: including the above example 8 or 9, wherein the insulation mechanism includes an insulation portion and a heat insulating portion.
11. Example 11 provided by the present invention: the example 10 is included, wherein the insulating portion is made of a ceramic material or a glass material.
12. Example 12 provided by the present invention: the method includes the above example 10, wherein the insulating part is an umbrella-shaped string ceramic column, an umbrella-shaped string glass column, a column-shaped string ceramic column or a column-shaped glass column, and glaze is hung inside and outside the umbrella or inside and outside the column.
13. Example 13 provided by the present invention: including the above example 12, wherein the distance between the outer edge of the umbrella-shaped string ceramic pillar or the umbrella-shaped string glass pillar and the electric field anode is more than 1.4 times the electric field distance, the sum of the distances between the umbrella-shaped protruding edges of the umbrella-shaped string ceramic pillar or the umbrella-shaped string glass pillar is more than 1.4 times the insulation distance between the umbrella-shaped string ceramic pillar or the umbrella-shaped string glass pillar, and the total depth inside the umbrella edge of the umbrella-shaped string ceramic pillar or the umbrella-shaped string glass pillar is more than 1.4 times the insulation distance between the umbrella-shaped string ceramic pillar or the umbrella-shaped string glass pillar.
14. Example 14 provided by the present invention: any of the above examples 7 to 13 is included, wherein the length of the first anode portion is 1/10 to 1/4, 1/4 to 1/3, 1/3 to 1/2, 1/2 to 2/3, 2/3 to 3/4, or 3/4 to 9/10 of the electric field anode length.
15. Example 15 provided by the present invention: including any of examples 7 through 14 above, wherein the length of the first anode portion is sufficiently long to remove a portion of dust, reduce dust accumulation on the insulating mechanism and the cathode support plate, and reduce electrical breakdown due to dust.
16. Example 16 provided by the present invention: including any of the above examples 7-15, wherein the second anode portion comprises a dust deposition section and a reserved dust deposition section.
17. Example 17 provided by the invention: including any of examples 6-16 above, wherein the electric field cathode comprises at least one electrode rod.
18. Example 18 provided by the present invention: including example 17 above, wherein the electrode rod has a diameter of no greater than 3 mm.
19. Example 19 provided by the present invention: including the above examples 17 or 18, wherein the electrode rod has a shape of a needle, a polygon, a burr, a screw rod, or a column.
20. Example 20 provided by the present invention: including any of examples 6-19 above, wherein the electric field anode is comprised of a hollow tube bundle.
21. Example 21 provided by the present invention: including the above example 20, wherein the cross section of the hollow of the electric field anode tube bundle adopts a circular shape or a polygonal shape.
22. Example 22 provided by the present invention: including example 21 above, wherein the polygon is a hexagon.
23. Example 23 provided by the present invention: including any of examples 19-22 above, wherein the tube bundle of field anodes is honeycomb shaped.
24. Example 24 provided by the present invention: including any of examples 6-23 above, wherein the electric field cathode is penetrated within the electric field anode.
25. Example 25 provided by the present invention: including any one of the above examples 1-24, wherein the electric field device further comprises an auxiliary electric field unit for generating an auxiliary electric field that is non-parallel to the ionizing dust removal electric field.
26. Example 26 provided by the invention: including any one of the above examples 1-24, wherein the electric field device further comprises an auxiliary electric field unit, the ionization and dust removal electric field comprises a flow channel, and the auxiliary electric field unit is used for generating an auxiliary electric field which is not perpendicular to the flow channel.
27. Example 27 provided by the present invention: including the above-mentioned example 25 or 26, wherein the auxiliary electric field unit includes a first electrode, and the first electrode of the auxiliary electric field unit is disposed at or near an inlet of the ionization and dust removal electric field.
28. Example 28 provided by the invention: including example 27 above, wherein the first electrode is a cathode.
29. Example 29 provided by the present invention: including the above example 27 or 28, wherein the first electrode of the auxiliary electric field unit is an extension of the electric field cathode.
30. Example 30 provided by the present invention: examples 29 described above are included, in which the first electrode of the auxiliary electric field unit has an angle α with the electric field anode, and 0 ° < α ≦ 125 °, or 45 ° ≦ α ≦ 125 °, or 60 ° ≦ α ≦ 100 °, or α ≦ 90 °.
31. Example 31 provided by the present invention: including any of the above examples 25-30, wherein the auxiliary electric field unit comprises a second electrode, the second electrode of the auxiliary electric field unit being disposed at or near an outlet of the ionizing dust removal electric field.
32. Example 32 provided by the invention: including example 31 above, wherein the second electrode is an anode.
33. Example 33 provided by the present invention: including the above examples 31 or 32, wherein the second electrode of the auxiliary electric field unit is an extension of the electric field anode.
34. Example 34 provided by the invention: examples 33 described above are included, in which the second electrode of the auxiliary electric field unit has an angle α with the electric field cathode, and 0 ° < α ≦ 125 °, or 45 ° ≦ α ≦ 125 °, or 60 ° ≦ α ≦ 100 °, or α ≦ 90 °.
35. Example 35 provided by the invention: including any of examples 25-28, 31, and 32 above, wherein the electrodes of the auxiliary electric field are disposed independently of the electrodes of the ionizing dust removal electric field.
36. Example 36 provided by the invention: any one of the above examples 6 to 35 is included, wherein a ratio of a dust deposition area of the electric field anode to a discharge area of the electric field cathode is 1.667: 1-1680: 1.
37. example 37 provided by the present invention: any one of the above examples 6 to 35 is included, wherein a ratio of a dust deposition area of the electric field anode to a discharge area of the electric field cathode is 6.67: 1-56.67: 1.
38. example 38 provided by the invention: including any of the above examples 6-37, wherein the electric field cathode has a diameter of 1-3 mm, and the electric field anode has a polar separation from the electric field cathode of 2.5-139.9 mm; the ratio of the dust deposition area of the electric field anode to the discharge area of the electric field cathode is 1.667: 1-1680: 1.
39. example 38 provided by the invention: including any of examples 6-37 above, wherein a polar separation of the electric field anode and the electric field cathode is less than 150 mm.
40. Example 40 provided by the present invention: including any one of examples 6-37 above, wherein the inter-polar distance between the electric field anode and the electric field cathode is 2.5-139.9 mm.
41. Example 41 provided by the present invention: including any one of examples 6-37 above, wherein the electric field anode is separated from the electric field cathode by a distance of 5-100 mm.
42. Example 42 provided by the present invention: including any of examples 6-41 above, wherein the electric field anode is 10-180mm in length.
43. Example 43 provided by the invention: including any of examples 6-41 above, wherein the electric field anode length is 60-180 mm.
44. Example 44 provided by the invention: including any of examples 6-43 above, wherein the electric field cathode has a length of 30-180 mm.
45. Example 45 provided by the invention: including any of examples 6-43 above, wherein the electric field cathode length is 54-176 mm.
46. Example 46 provided by the invention: including any of examples 36-45 above, wherein, when operating, the ionizing dust removal electric field has a number of couplings ≦ 3.
47. Example 47 provided by the invention: any one of the above examples 6 to 46 is included, wherein a ratio of a dust deposition area of the electric field anode to a discharge area of the electric field cathode, a polar distance between the electric field anode and the electric field cathode, a length of the electric field anode, and a length of the electric field cathode are such that a number of coupling times of the ionized dust removal electric field is equal to or less than 3.
48. Example 47 provided by the invention: any one of the above examples 6 to 47 is included, wherein the ionizing dust removal electric field voltage has a value in a range of 1kv to 50 kv.
49. Example 49 provided by the invention: including any of the above examples 1-47, wherein the electric field device further comprises a number of connection housings through which the series electric field stages are connected.
50. Example 50 provided by the invention: including example 49 above, wherein the distance of adjacent electric field levels is more than 1.4 times the pole pitch.
51. Example 51 provided by the present invention: including any of examples 1-50 above, wherein the VOCs gas treatment device further comprises an adsorption device disposed between the ultraviolet device and the electric field device.
52. Example 52 provided by the invention: example 51 above is included, wherein an adsorbent material is disposed within the adsorbent device.
53. Example 53 provided by the present invention: including example 52 above, wherein the adsorbent material comprises at least one of activated carbon, molecular sieve.
54. Example 54 provided by the invention: a VOCs gas treatment method comprises the following steps:
carrying out UV treatment on the gas to obtain a product after VOCs are treated by UV;
and (4) performing electric field dust removal treatment on the product subjected to the UV treatment of the VOCs, and removing particulate matters in the product subjected to the UV treatment of the VOCs.
55. Example 55 provided by the invention: example 54 is included, wherein the method for processing VOCs gas further includes, before the electric field dust removal processing, subjecting the product of UV processing of VOCs to an adsorption processing, and then performing an electric field dust removal processing.
56. Example 56 provided by the invention: example 55 is included, wherein the adsorbent of the adsorption treatment is activated carbon and/or molecular sieve.
57. Example 57 provided by the invention: including any one of examples 54-56, wherein the UV treatment employs at least one ultraviolet lamp.
58. Example 58 provided by the invention: including any one of examples 54-57 above, wherein the ultraviolet light provided by the ultraviolet lamp is single peak ultraviolet light or dual peak ultraviolet light.
59. Example 59 provided by the invention: including any one of examples 54-58 above, wherein the ultraviolet lamp provides a single peak ultraviolet light having a main peak at 253.7nm or 185 nm.
60. Example 60 provided by the invention: including examples 54-59 above, wherein the uv lamp provides a double-peak uv light with dominant peaks of 253.7nm and 185nm, respectively.
61. Example 61 provided by the invention: the electric field dust removal processing method of any one of examples 54 to 60, further comprising: a method of providing an auxiliary electric field, comprising the steps of:
passing the VOCs gas through a flow channel;
an auxiliary electric field is generated in the flow channel, and the auxiliary electric field is not perpendicular to the flow channel.
62. Example 62 provided by the invention: example 61 is included, wherein the auxiliary electric field comprises a first electrode disposed at or near an inlet of the ionizing dedusting electric field.
63. Example 63 provided by the invention: example 62 is included, wherein the first electrode is a cathode.
64. Example 64 provided by the invention: including any one of examples 62 or 63, wherein the first electrode is an extension of the electric field cathode.
65. Example 65 provided by the invention: examples 64 are included wherein the first electrode has an angle α with the electric field anode of 0 ° < α ≦ 125 °, or 45 ° ≦ α ≦ 125 °, or 60 ° ≦ α ≦ 100 °, or α ≦ 90 °.
66. Example 66 provided by the invention: including any one of examples 61-65, wherein the auxiliary electric field comprises a second electrode disposed at or near an outlet of the ionizing dedusting electric field.
67. Example 67 provided by the invention: example 66 is included, wherein the second electrode is an anode.
68. Example 68 provided by the invention: including examples 66 or 67, wherein the second electrode is an extension of the electric field anode.
69. Example 69 provided by the present invention: example 68 is included wherein the second electrode has an angle α with the electric field cathode and 0 ° < α ≦ 125 °, or 45 ° ≦ α ≦ 125 °, or 60 ° ≦ α ≦ 100 °, or α ≦ 90 °.
70. Example 70 provided by the invention: including any one of examples 61 through 63, wherein the first electrode is disposed independently of the electric field anode and the electric field cathode.
71. Example 71 provided by the invention: including any one of examples 61, 66, and 67, wherein the second electrode is disposed independently of the electric field anode and the electric field cathode.
72. Example 72 provided by the invention: the electric field dust removal processing method including examples 54 to 71 further includes: a method of reducing dust removal electric field coupling, comprising the steps of:
passing the gas through an ionization dust removal electric field generated by an electric field anode and an electric field cathode;
the electric field anode parameters or/and the electric field cathode parameters are selected to reduce the number of electric field couplings.
73. Example 73 provided by the invention: example 72 is included wherein the ratio of the dust collection area of the electric field anode to the discharge area of the electric field cathode is selected.
74. Example 74 provided by the invention: example 73 included selecting a ratio of a dust deposition area of the electric field anode to a discharge area of the electric field cathode to be 1.667: 1-1680: 1.
75. example 75 provided by the invention: example 73 included selecting a ratio of a dust deposition area of the electric field anode to a discharge area of the electric field cathode to be 6.67: 1-56.67: 1.
76. example 76 provided by the invention: including any one of examples 72 through 75, including selecting the electric field cathode to have a diameter of 1-3 mm, and the electric field anode to the electric field cathode to have a polar separation of 2.5-139.9 mm; the ratio of the dust deposition area of the electric field anode to the discharge area of the electric field cathode is 1.667: 1-1680: 1.
77. example 77 provided by the invention: including any one of examples 72 to 76, comprising selecting a polar separation of the electric field anode and the electric field cathode to be less than 150 mm.
78. Example 78 provided by the invention: including any one of examples 72 through 76, comprising selecting a pole separation distance of the electric field anode and the electric field cathode to be 2.5-139.9 mm.
79. Example 79 provided by the invention: including any one of examples 72 to 76, comprising selecting a polar separation of the electric field anode and the electric field cathode of 5-100 mm.
80. Example 80 provided by the invention: including any one of examples 72 through 79, wherein including selecting the electric field anode to be 10-180mm in length.
81. Example 81 provided by the invention: including any one of examples 72 through 79, wherein including selecting the electric field anode to be 60-180mm in length.
82. Example 82 provided by the invention: including any one of examples 72 to 81, comprising selecting the electric field cathode to have a length of 30-180 mm.
83. Example 83 provided by the invention: including any one of examples 72 to 81, wherein comprising selecting the electric field cathode length to be 54-176 mm.
84. Example 84 provided by the invention: including any one of examples 72 through 83, wherein including selecting the electric field cathode to include at least one electrode rod.
85. Example 85 provided by the invention: examples 84, wherein the diameter of the electrode rod is selected to be no greater than 3mm, are included.
86. Example 86 provided by the invention: examples 84 and 85 are included, including selecting the shape of the electrode rod to be needle-like, polygonal, burred, threaded rod-like, or cylindrical.
87. Example 87 provided by the invention: including any of examples 72 to 86, wherein the electric field anode is selected to consist of a hollow tube bundle.
88. Example 88 provided by the invention: example 87 is included, wherein the cross-section of the void comprising the anode tube bundle is selected to be circular or polygonal.
89. Example 89 provided by the invention: example 88 is included, wherein selecting the polygon to be a hexagon.
90. Example 90 provided by the invention: including any one of examples 87 to 89, wherein the tube bundle comprising the electric field anodes is selected to be honeycomb-shaped.
91. Example 91 provided by the invention: including any one of examples 72 to 90, comprising selecting the electric field cathode to penetrate within the electric field anode.
92. Example 92 provided by the invention: including any of examples 72 through 91, wherein including the electric field anode size or/and the electric field cathode size selected such that the electric field coupling number is ≦ 3.
93. Example 93 provided by the invention: including any one of examples 54-92, wherein the UV-treated VOCs products include nanoparticles, and wherein the particles in the UV-treated VOCs products include nanoparticles in the UV-treated VOCs products.
94. Example 94 provided by the invention: included is any one of examples 54-93, wherein the UV treated VOCs product contains particles smaller than 50nm, and wherein the particles in the UV treated VOCs removed product comprise particles smaller than 50nm in the UV treated VOCs removed product.
95. Example 95 provided by the invention: examples 54 to 94, wherein the UV treated VOCs product comprises 15-35 nm particles, and wherein the removal of the UV treated VOCs comprises 15-35 nm particles.
96. Example 96 provided by the invention: included is any one of examples 54-95, wherein the UV-treated VOCs product contains 23nm particulate matter, and wherein the removal of the UV-treated VOCs product comprises removal of 23nm particulate matter from the UV-treated VOCs product.
97. Example 97 provided by the invention: including any one of examples 54 to 96, wherein the removal rate of 23nm particulate matter in the product after the removal of the UV-treated VOCs is greater than or equal to 93%.
98. Example 98 provided by the invention: including any one of examples 54 to 97, wherein the removal rate of 23nm particulate matter in the product after removal of UV-treated VOCs is 95% or more.
99. Example 99 provided by the invention: including any one of examples 54 to 98, wherein the removal rate of 23nm particulate matter in the product after removal of UV-treated VOCs is 99.99% or more.
In the present invention, the gas includes all gases containing VOCs.
In the invention, the product obtained after UV treatment of VOCs contains nano particles, wherein the nano particles refer to particles with the particle size of less than 1 μm.
Fig. 1 is a schematic structural diagram of a VOCs gas processing apparatus in embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of an electric field generating unit in embodiments 2 to 15 of the present invention.
FIG. 3 is a view A-A of the electric field generating unit of FIG. 2 in examples 2, 5 and 11 of the present invention.
Fig. 4 is a view a-a of the electric field generating unit of fig. 2, marked with length and angle in examples 2 and 5 of the present invention.
Fig. 5 is a schematic view of the electric field device structure of two electric field stages in example 2, example 5 and example 11 of the present invention.
Fig. 6 is a schematic structural diagram of an electric field device in embodiment 16 of the present invention.
Fig. 7 is a schematic structural diagram of an electric field device in embodiment 18 of the present invention.
Fig. 8 is a schematic structural diagram of an electric field device in embodiment 19 of the present invention.
FIG. 9 is a schematic flow chart of a test apparatus in example 20 of the present invention.
FIG. 10 is a graph showing the VOCs concentration and VOCs removal rate as a function of time at the device outlet of the electric field device in accordance with example 20 of the present invention.
FIG. 11 shows the CO at the outlet of the electric field apparatus in accordance with embodiment 20 of the present invention2Concentration profile over treatment time.
FIG. 12 is a graph showing the variation of PM2.5 with processing time at the device outlet of the electric field device in accordance with embodiment 20 of the present invention.
FIG. 13 is a schematic flow chart of a test apparatus in example 26 of the present invention.
FIG. 14 is a graph showing the time-dependent changes of VOCs concentrations at the inlet, outlet and outlet of the ultraviolet light unit and the adsorption unit when purifying low VOCs concentrations in example 26 of the present invention.
FIG. 15 shows the CO at the inlet and outlet of the ultraviolet device and the outlet of the adsorption device when purifying low concentrations of VOCs in example 26 of the present invention2Concentration versus time curve.
FIG. 16 is a graph showing the time-dependent changes of VOCs concentrations at the inlet, outlet and outlet of the ultraviolet light unit and the adsorption unit when purifying high VOCs concentrations in example 26 of the present invention.
FIG. 17 shows the CO at the inlet and outlet of the ultraviolet device and the outlet of the adsorption device in example 26 of the present invention for purifying high VOCs concentration2Concentration versus time curve.
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
In some embodiments of the present invention, there is provided a VOCs gas processing apparatus, comprising: an inlet, an outlet, and a flow channel between the inlet and the outlet; the device comprises an inlet, an outlet and a flow passage, and is characterized by further comprising an ultraviolet device and an electric field device, wherein the ultraviolet device and the electric field device are sequentially arranged along the flow passage from the inlet to the outlet. When the VOCs gas treatment device works, gas enters the flow channel from the inlet, enters the ultraviolet device in the flow channel, enters the electric field device after being treated by ultraviolet, is used for removing particles in the gas after being treated by ultraviolet, and is discharged from the outlet.
In an embodiment of the present invention, the electric field device may include an electric field cathode and an electric field anode, and an ionization dust-removing electric field is formed between the electric field cathode and the electric field anode. Gas enters an ionization dust removal electric field, oxygen ions in the gas are ionized, a large number of oxygen ions with charges are formed, the oxygen ions are combined with particles such as dust in the gas, the particles are charged, the electric field anode exerts adsorption force on the particles with negative charges, and the particles are adsorbed on the electric field anode to remove the particles in the gas.
In some embodiments of the present invention, the apparatus for processing VOCs further comprises an adsorption device disposed in the flow channel of the apparatus for processing VOCs. In some embodiments of the present invention, the adsorption device is located between the ultraviolet device and the electric field device.
In some embodiments of the present invention, the adsorption device includes a gas inlet and a gas outlet, the gas inlet of the adsorption device is communicated with the gas outlet of the ultraviolet device, and the gas outlet of the adsorption device is communicated with the electric field device inlet of the electric field device.
In some embodiments of the present invention, the UV treatment and the electric field dust removal are combined to purify the VOCs gas, and the following technical effects are obtained:
the inventor of the application researches and discovers that the product of the gas containing VOCs after being treated by UV irradiation is not only CO2And H2O, also large molecular weight nano-sized solid particles are present, for example, the inventors of the present application confirmed by a large amount of experimental data: the PM2.5 content in the product after the UV treatment of the VOCs is increased compared with that before the UV irradiation, and the nano-scale particles in the product after the UV treatment are greatly increased, wherein the content of the nano-scale particles is increasedIn addition, the PN value of the solid particles with the particle size of 23nm is increased by more than 1 time, so secondary pollution is caused if the products after UV irradiation treatment are directly discharged. Therefore, the UV treatment of gas containing VOCs requires consideration of removing nano-solid particles. However, the prior art has found no studies on the removal of nanoparticles, particularly particles below 50nm, especially particles at 23nm, from the product after UV irradiation treatment. The inventors of the present application found that the electric field dedusting system invented by them can effectively remove the nanoparticles, especially the particles below 50nm, especially the particles below 23nm, in the product after UV irradiation treatment. Wherein, the removal efficiency of the particles with the particle size of 23nm reaches more than 99.99 percent, and the secondary pollution is effectively avoided.
In an embodiment of the present invention, the adsorption purification technique functions as follows:
firstly, the method comprises the following steps: the UV light can not completely treat VOCs in the gas into CO in the ultraviolet treatment stage2And H2O, intermediate products are produced, all VOCs components cannot be degraded, H is in the adsorption device2O, UV products of light irradiation such as O3、OH -The intermediate product and the VOCs components which are not subjected to degradation are adsorbed and collected, and the UV intermediate product and the VOCs components which are not subjected to degradation are adsorbed in the pore passage of the adsorbing material and are subjected to O3、OH -Further decomposing into CO under the action of an equal-strength oxidant2And H2O, from desorption in the adsorption material pore, play the additional action to UV illumination processing VOCs, realize online desorption simultaneously, avoid the adsorbent inefficacy, ensure adsorbent repeatedly usable, improved VOCs treatment effeciency.
Secondly, the method comprises the following steps: in economic aspect, in practical application operation, the release amount of VOCs is not constant, for example, in painting, the concentration of VOCs released in the painting process is fluctuated, when the concentration of VOCs is high, the VOCs can not be completely degraded by UV illumination, the residual VOCs (VOCs which are not degraded by UV in the ultraviolet purification stage) are adsorbed in the adsorbing material for storage, are gathered and concentrated, and are subjected to UV illumination product O3、OH -Further oxidized and decomposed again under the action of an equal-strength oxidant; when in useWhen the concentration of the VOCs is very low, strong oxidized ion hydroxyl free radicals (. about.OH) generated by the ultraviolet device enter the adsorption device to further catalyze the VOCs stored in the adsorption material into CO2And H2And O. Therefore, the VOCs gas treatment efficiency is improved, the energy consumption is saved, and the VOCs gas treatment equipment can be miniaturized.
Thirdly, the method comprises the following steps: the adsorption material can adsorb the ozone generated by photolysis, and the adsorbed ozone can oxidize VOCs accumulated in the adsorption material, so that O3Fully utilizes the ozone and avoids secondary pollution caused by the ozone.
In an embodiment of the present invention, the combination of the ultraviolet purification and the adsorption purification improves the efficiency of UV purifying the VOCs gas, saves energy consumption, and makes the VOCs gas treatment device compact.
In some embodiments of the present invention, the ultraviolet device comprises at least one ultraviolet lamp.
In some embodiments of the present invention, the UV light provided by the UV lamp is single-peak UV light or dual-peak UV light.
In some embodiments of the present invention, the ultraviolet lamp provides a single peak of ultraviolet light having a main peak of 253.7nm or 185 nm.
In some embodiments of the present invention, the dominant peaks of the dual-peak ultraviolet light provided by the ultraviolet lamp are 253.7nm and 185nm, respectively.
In some embodiments of the present invention, the adsorbing device is provided with an adsorbing material, which includes but is not limited to activated carbon, molecular sieve, and any adsorbing material capable of adsorbing at least one of other VOCs, VOCs products and intermediate products generated from the processes of photolysis, ozone oxidation, UV light excited oxidation, etc., such as VOCs photolysis product O3The material of (1).
In certain embodiments of the present invention, the adsorbent material comprises at least one of a hydrophilic engineered activated carbon, a hydrophobic engineered molecular sieve.
In some embodiments of the present invention, a method for processing VOCs is provided, comprising the steps of:
carrying out UV treatment on the gas to obtain a product after VOCs are treated by UV;
and (4) performing electric field dust removal treatment on the product subjected to the UV treatment of the VOCs, and removing particulate matters in the product subjected to the UV treatment of the VOCs.
In an embodiment of the present invention, the method for processing VOCs further includes performing an adsorption process on the product of UV processing of VOCs, and then performing an electric field dust removal process.
In an embodiment of the present invention, the adsorbent for adsorption treatment is activated carbon and/or molecular sieve.
In one embodiment of the present invention, at least one ultraviolet lamp is used for the UV irradiation treatment.
In an embodiment of the invention, the UV light provided by the UV lamp is single-peak UV light or dual-peak UV light.
In an embodiment of the invention, the ultraviolet lamp provides a main peak of the single-peak ultraviolet light of 253.7nm or 185 nm.
In an embodiment of the invention, the dominant peaks of the dual-peak ultraviolet light provided by the ultraviolet lamp are 253.7nm and 185nm, respectively.
In an embodiment of the invention, the product after the UV treatment of the VOCs contains nanoparticles, and the nanoparticles in the product after the removal of the UV treatment of the VOCs include nanoparticles in the product after the removal of the UV treatment of the VOCs.
In an embodiment of the invention, the product after UV treatment of the VOCs contains particles smaller than 50nm, and the particles in the product after UV treatment of the VOCs include particles smaller than 50nm in the product after UV treatment of the VOCs.
In an embodiment of the invention, the product after the UV treatment of the VOCs contains 15 to 35 nm of particles, and the particles in the product after the removal of the UV treatment of the VOCs include 15 to 35 nm of particles in the product after the removal of the UV treatment of the VOCs.
In an embodiment of the invention, the product after the UV treatment of the VOCs contains 23nm of particulate matter, and the particulate matter in the product after the removal of the UV treatment of the VOCs includes 23nm of particulate matter in the product after the removal of the UV treatment of the VOCs.
In an embodiment of the invention, the removal rate of the 23nm particulate matters in the product after the removal of the UV-treated VOCs is greater than or equal to 93%.
In an embodiment of the invention, the removal rate of the 23nm particulate matters in the product after the removal of the UV-treated VOCs is greater than or equal to 95%.
In an embodiment of the invention, the removal rate of the 23nm particulate matters in the product after the removal of the UV-treated VOCs is greater than or equal to 99.99%.
In an embodiment of the present invention, the electric field cathode of the electric field device includes a plurality of cathode filaments. The diameter of the cathode filament can be 0.1mm-20mm, and the size parameter is adjusted according to the application occasion and the dust accumulation requirement. In one embodiment of the present invention, the diameter of the cathode filament is not greater than 3 mm. In one embodiment of the invention, the cathode wire is made of metal wire or alloy wire which is easy to discharge, is temperature resistant, can support the self weight and is stable in electrochemistry. In an embodiment of the present invention, the cathode filament is made of titanium. The specific shape of the cathode filament is adjusted according to the shape of the electric field anode, for example, if the dust deposition surface of the electric field anode is a plane, the section of the cathode filament is circular; if the dust deposition surface of the electric field anode is a circular arc surface, the cathode filament needs to be designed into a polyhedral shape. The length of the cathode filament is adjusted according to the electric field anode.
In an embodiment of the present invention, the electric field cathode includes a plurality of cathode bars. In an embodiment of the present invention, the diameter of the cathode bar is not greater than 3 mm. In one embodiment of the present invention, the cathode rod is made of a metal rod or an alloy rod which is easily discharged. The shape of the cathode rod may be needle-like, polygonal, burr-like, threaded rod-like, columnar, or the like. The shape of the cathode bar can be adjusted according to the shape of the electric field anode, for example, if the dust deposition surface of the electric field anode is a plane, the section of the cathode bar needs to be designed to be circular; if the dust deposition surface of the electric field anode is a circular arc surface, the cathode bar needs to be designed into a polyhedral shape.
In an embodiment of the present invention, the electric field cathode is disposed through the electric field anode.
In one embodiment of the present invention, the electric field anode comprises one or more hollow anode tubes disposed in parallel. When there are a plurality of hollow anode tubes, all the hollow anode tubes constitute a honeycomb-shaped electric field anode. In an embodiment of the present invention, the cross-section of the hollow anode tube may be circular or polygonal. If the cross section of the hollow anode tube is circular, an even electric field can be formed between the electric field anode and the electric field cathode, and dust is not easy to accumulate on the inner wall of the hollow anode tube. If the cross section of the hollow anode tube is triangular, 3 dust accumulation surfaces can be formed on the inner wall of the hollow anode tube, 3 far-angle dust containing angles are formed, and the dust containing rate of the hollow anode tube with the structure is highest. If the cross section of the hollow anode tube is quadrilateral, 4 dust accumulation surfaces and 4 dust containing corners can be obtained, but the splicing structure is unstable. If the cross section of the hollow anode tube is hexagonal, 6 dust accumulation surfaces and 6 dust containing angles can be formed, and the dust accumulation surfaces and the dust containing rate are balanced. If the cross section of the hollow anode tube is polygonal, more dust-collecting edges can be obtained, but the dust holding rate is lost. In an embodiment of the present invention, the diameter of the inner circle of the hollow anode tube ranges from 5mm to 400 mm.
In an embodiment of the present invention, the electric field cathode is mounted on the cathode supporting plate, and the cathode supporting plate is connected to the electric field anode through the insulating mechanism. The insulating mechanism is used for realizing the insulation between the cathode supporting plate and the electric field anode. In an embodiment of the present invention, the electric field anode includes a first anode portion and a second anode portion, i.e. the first anode portion is close to the inlet of the electric field device, and the second anode portion is close to the outlet of the electric field device. The cathode supporting plate and the insulating mechanism are arranged between the first anode part and the second anode part, namely the insulating mechanism is arranged in the middle of an ionization electric field or in the middle of an electric field cathode, so that the cathode of the electric field can be well supported, the cathode of the electric field can be fixed relative to the anode of the electric field, and a set distance is kept between the cathode of the electric field and the anode of the electric field. In the prior art, the supporting point of the electric field cathode is at the end point of the electric field cathode, and the distance between the electric field cathode and the electric field anode is difficult to maintain. In an embodiment of the present invention, the insulating mechanism is disposed outside the electric field flow channel to prevent or reduce dust in the gas from collecting on the insulating mechanism, which may result in breakdown or conduction of the insulating mechanism.
In an embodiment of the present invention, the insulating mechanism uses a high voltage resistant ceramic insulator to insulate the electric field cathode and the electric field anode. The electric field anode is also referred to as a housing.
In an embodiment of the invention, the first anode portion of the electric field anode is located in front of the cathode support plate and the insulating mechanism in the gas flowing direction, and the first anode portion can remove water in the gas, so as to prevent water from entering the insulating mechanism, and short circuit and ignition of the insulating mechanism are caused. In addition, the first anode part can remove a considerable part of dust in the gas, and when the gas passes through the insulating mechanism, the considerable part of dust is eliminated, so that the possibility of short circuit of the insulating mechanism caused by the dust is reduced. In an embodiment of the present invention, the insulation mechanism includes an insulation porcelain rod. The design of first anode portion is mainly in order to protect insulating knob insulator not by pollution such as particulate matter in the gas, in case gas pollution insulating knob insulator will cause electric field positive pole and electric field negative pole to switch on to make the laying dust function of electric field positive pole invalid, so the design of first anode portion can effectively reduce insulating knob insulator and be polluted, improves the live time of product. In the process that gas flows through the electric field flow channel, the first anode part and the electric field cathode contact polluted gas firstly, and the insulating mechanism contacts the gas later, so that the purpose of removing dust firstly and then passing through the insulating mechanism is achieved, the pollution to the insulating mechanism is reduced, and the cleaning and maintenance period is prolonged. The length of the first anode portion is sufficiently long to remove a portion of dust, reduce dust accumulation on the insulating mechanism and the cathode support plate, and reduce electrical breakdown caused by dust. In an embodiment of the invention, the length of the first anode portion accounts for 1/10-1/4, 1/4-1/3, 1/3-1/2, 1/2-2/3, 2/3-3/4, or 3/4-9/10 of the total length of the electric field anode.
In an embodiment of the invention, the second anode portion of the electric field anode is located behind the cathode support plate and the insulating mechanism in the gas flow direction. The second anode part comprises a dust deposition section and a reserved dust deposition section. The dust accumulation section adsorbs particles in the gas by utilizing static electricity, and the dust accumulation section is used for increasing the dust accumulation area and prolonging the service time of the electric field device. The reserved dust accumulation section can provide failure protection for the dust accumulation section. The reserved dust accumulation section is used for further improving the dust accumulation area and the dust removal effect on the premise of meeting the design dust removal requirement. And reserving a dust accumulation section for supplementing the dust accumulation of the front section. In an embodiment of the invention, the first anode portion and the second anode portion may use different power sources.
In an embodiment of the present invention, since there is a very high potential difference between the electric field cathode and the electric field anode, in order to prevent the electric field cathode and the electric field anode from being conducted, the insulating mechanism is disposed outside the electric field flow channel between the electric field cathode and the electric field anode. Therefore, the insulating mechanism is suspended outside the electric field anode. In one embodiment of the present invention, the insulating mechanism may be made of non-conductive temperature-resistant materials, such as ceramics, glass, etc. In one embodiment of the invention, the insulation of the completely closed air-free material requires that the insulation isolation thickness is more than 0.3 mm/kv; air insulation requirements >1.4 mm/kv. The insulation distance may be set according to 1.4 times or more of the inter-polar distance between the electric field cathode and the electric field anode. In one embodiment of the invention, the insulating mechanism is made of ceramic, and the surface of the insulating mechanism is glazed; the connection can not be filled by using adhesive or organic materials, and the temperature resistance is higher than 350 ℃.
In an embodiment of the present invention, the insulating mechanism includes an insulating portion and a heat insulating portion. In order to make the insulating mechanism have the anti-pollution function, the insulating part is made of a ceramic material or a glass material. In an embodiment of the present invention, the insulating portion may be an umbrella-shaped string of ceramic posts or glass posts, and glaze is hung inside and outside the umbrella. The distance between the outer edge of the umbrella-shaped string ceramic column or the glass column and the anode of the electric field is more than or equal to 1.4 times of the distance of the electric field, namely more than or equal to 1.4 times of the distance between the electrodes. The sum of the distances between the umbrella protruding edges of the umbrella-shaped string ceramic columns or the glass columns is more than or equal to 1.4 times of the insulation distance of the umbrella-shaped string ceramic columns. The total depth of the umbrella edge of the umbrella-shaped string ceramic column or the glass column is more than or equal to 1.4 times of the insulation distance of the umbrella-shaped string ceramic column. The insulating part can also be a columnar ceramic column or a glass column, and glaze is hung inside and outside the column. In an embodiment of the invention, the insulating portion may also be in a tower shape.
In an embodiment of the present invention, a heating rod is disposed in the insulating portion, and when the ambient temperature of the insulating portion approaches the dew point, the heating rod is activated to perform heating. Because the inside and outside of the insulating part have temperature difference during use, condensation is easily generated inside and outside the insulating part. The outer surface of the insulation may be heated spontaneously or by gas to generate high temperature, which requires necessary insulation protection and scalding prevention. The insulating portion includes a protective containment barrier located outside of the insulating portion. In an embodiment of the invention, the tail part of the insulating part needs to be insulated from the condensation position, so that the condensation component is prevented from being heated by the environment and the heat dissipation high temperature.
In one embodiment of the invention, the outgoing line of the power supply of the electric field device is connected in a wall-crossing manner by using the umbrella-shaped string ceramic column or the glass column, the elastic contact head is used for connecting the cathode supporting plate in the wall, the sealed insulation protection wiring cap is used for plugging and pulling out the wall, and the insulation distance between the outgoing line conductor and the wall is greater than that of the umbrella-shaped string ceramic column or the glass column. In one embodiment of the invention, the high-voltage part is provided with no lead and is directly arranged on the end head, so that the safety is ensured, the high-voltage module is wholly insulated and protected by ip68, and heat exchange and heat dissipation are realized by using a medium.
In an embodiment of the present invention, the electric field device includes a first electric field stage, the first electric field stage includes a plurality of first electric field generating units, and there may be one or more first electric field generating units. The first electric field generating unit is also called a first dust collecting unit, the first dust collecting unit comprises the electric field anode and the electric field cathode, and one or more first dust collecting units are arranged. When the number of the first electric field stages is multiple, the dust collection efficiency of the electric field device can be effectively improved. In the same first electric field stage, the anodes of the electric fields have the same polarity, and the cathodes of the electric fields have the same polarity. And when the first electric field stages are multiple, the first electric field stages are connected in series. In an embodiment of the present invention, the electric field apparatus further includes a plurality of connecting housings, the first electric field stages connected in series are connected through the connecting housings; the distance between the first electric field levels of two adjacent levels is more than 1.4 times of the pole pitch.
In an embodiment of the invention, the electric field anode and the electric field cathode are electrically connected to two electrodes of the power supply respectively. The voltage loaded on the electric field anode and the electric field cathode needs to be selected with proper voltage levels, and the specific selection of which voltage level depends on the volume, temperature resistance, dust holding rate and the like of the electric field device. For example, the voltage is from 1kv to 50 kv; the design firstly considers the temperature-resistant condition, the parameters of the inter-polar distance and the temperature: 1MM is less than 30 degrees, the dust accumulation area is more than 0.1 square/kilocubic meter/hour, the length of the electric field is more than 5 times of the inscribed circle of the single tube, and the air flow velocity of the electric field is controlled to be less than 9 meters/second. In an embodiment of the present invention, the electric field anode is formed of a first hollow anode tube and has a honeycomb shape. The first hollow anode tube port may be circular or polygonal in shape. In one embodiment of the invention, the value range of the internal tangent circle of the first hollow anode tube is 5-400mm, the corresponding voltage is 0.1-120kv, and the corresponding current of the first hollow anode tube is 0.1-30A; different inscribed circles correspond to different corona voltages, approximately 1KV/1 MM.
The inventor of the invention researches and discovers that the defects of poor removal efficiency and high energy consumption of the existing electric field device are caused by electric field coupling. The present invention can significantly reduce the size (i.e., volume) of the electric field device by reducing the number of electric field couplings. For example, the size of the ionization dust removal device provided by the invention is about one fifth of the size of the existing ionization dust removal device. The reason is that the gas flow rate is set to be about 1m/s in the existing ionized dust removing device in order to obtain acceptable particle removal rate, but the invention can still obtain higher particle removal rate under the condition of increasing the gas flow rate to 6 m/s. When processing a given flow of gas, the size of the electric field device can be reduced as the gas velocity increases.
In addition, the invention can obviously improve the particle removal efficiency. For example, the prior art electric field device can remove about 70% of the particulate matter in the engine exhaust at a gas flow rate of about 1m/s, but the present invention can remove about 99% of the particulate matter even at a gas flow rate of 6 m/s.
The present invention achieves the above-noted unexpected results as the inventors have discovered the effect of electric field coupling and have found a way to reduce the number of electric field couplings.
The method for reducing the coupling frequency of the electric field provided by the invention comprises the following steps:
in one embodiment of the present invention, an asymmetric structure is adopted between the electric field cathode and the electric field anode. In the symmetrical electric field, the polar particles are subjected to an acting force with the same magnitude and opposite directions, and the polar particles reciprocate in the electric field; in an asymmetric electric field, the polar particles are subjected to two different forces, and the polar particles move in the direction of the large force, so that coupling can be reduced.
In some embodiments of the present invention, there is provided a VOCs gas treatment apparatus comprising: an inlet, an outlet, and a flow channel between the inlet and the outlet; the ultraviolet device and the electric field device are sequentially arranged along the flow channel from the inlet to the outlet; the electric field device comprises: the device comprises an electric field device inlet, an electric field device outlet, an electric field cathode and an electric field anode, wherein the electric field cathode and the electric field anode are used for generating an ionization dust removal electric field; the ratio of the dust deposition area of the electric field anode to the discharge area of the electric field cathode is 1.667: 1-1680: 1.
in an embodiment of the present invention, a ratio of a dust deposition area of the electric field anode to a discharge area of the electric field cathode is 6.67: 1-56.67: 1.
in an embodiment of the present invention, the ratio of the dust deposition area of the electric field anode to the discharge area of the electric field cathode is such that the coupling frequency of the ionization dust removal electric field is less than or equal to 3.
In an embodiment of the present invention, the ratio of the dust deposition area of the electric field anode to the discharge area of the electric field cathode, the inter-polar distance between the electric field anode and the electric field cathode, the length of the electric field anode, and the length of the electric field cathode enable the coupling frequency of the ionization dust removal electric field to be less than or equal to 3.
In an embodiment of the present invention, a method for processing VOCs is provided, which includes the following steps:
carrying out UV treatment on the VOCs gas to obtain a product after the VOCs is treated by UV;
performing electric field dust removal treatment on the product subjected to the UV treatment on the VOCs, and removing particulate matters in the product subjected to the UV treatment on the VOCs;
the electric field dust removal treatment also comprises a method for reducing the coupling of a dust removal electric field, and the method for reducing the coupling of the dust removal electric field comprises the following steps: comprises selecting the ratio of the dust collecting area of the electric field anode to the discharging area of the electric field cathode to make the electric field coupling frequency less than or equal to 3.
An ionization dust removal electric field is formed between an electric field cathode and an electric field anode of the electric field device. In order to reduce the electric field coupling of the electric field for the ionization and dust removal, in an embodiment of the present invention, the method for reducing the electric field coupling includes the following steps: the ratio of the dust collecting area of the electric field anode to the discharging area of the electric field cathode is selected to make the electric field coupling frequency less than or equal to 3. In an embodiment of the present invention, a ratio of the dust collecting area of the electric field anode to the discharging area of the electric field cathode may be: 1.667: 1-1680: 1; 3.334: 1-113.34: 1; 6.67: 1-56.67: 1; 13.34: 1-28.33: 1. the embodiment selects the relatively large-area dust collecting area of the electric field anode and the relatively small-area discharge area of the electric field cathode, and specifically selects the area ratio, so that the discharge area of the electric field cathode can be reduced, the suction force is reduced, the dust collecting area of the electric field anode is enlarged, the suction force is enlarged, namely, asymmetric electrode suction force is generated between the electric field cathode and the electric field anode, dust after charging falls into the dust collecting surface of the electric field anode, the dust cannot be sucked away by the electric field cathode though the polarity is changed, the electric field coupling is reduced, and the electric field coupling frequency is less than or equal to 3. The coupling frequency of the electric field is less than or equal to 3, the energy consumption of the electric field is low, the coupling consumption of the electric field to aerosol, water mist, oil mist and loose and smooth particles in gas can be reduced, and the electric energy of the electric field is saved by 30-50%. The dust collection area refers to the area of the working surface of the electric field anode, for example, if the electric field anode is in a hollow regular hexagon tube shape, the dust collection area is the inner surface area of the hollow regular hexagon tube shape, and the dust collection area is also called as the dust deposition area. The discharge area refers to the area of the working surface of the cathode of the electric field, for example, if the cathode of the electric field is rod-shaped, the discharge area is the outer surface area of the rod.
In some embodiments of the present invention, there is provided a VOCs gas treatment apparatus comprising: an inlet, an outlet, and a flow channel between the inlet and the outlet; the ultraviolet device and the electric field device are sequentially arranged along the flow channel from the inlet to the outlet; the electric field device comprises: the device comprises an electric field device inlet, an electric field device outlet, an electric field cathode and an electric field anode, wherein the electric field cathode and the electric field anode are used for generating an ionization dust removal electric field; the length of the electric field anode is 10-180 mm.
In an embodiment of the present invention, the length of the electric field anode is 60-180 mm.
In an embodiment of the present invention, the length of the electric field anode enables the coupling frequency of the ionization dust removal electric field to be less than or equal to 3.
In some embodiments of the present invention, a method for processing VOCs is provided, comprising the steps of:
carrying out UV treatment on the gas to obtain a product after VOCs are treated by UV;
performing electric field dust removal treatment on the product subjected to the UV treatment on the VOCs, and removing particulate matters in the product subjected to the UV treatment on the VOCs;
the electric field dust removal treatment also comprises a method for reducing the coupling of a dust removal electric field, and the method for reducing the coupling of the dust removal electric field comprises the following steps: comprises selecting the length of the anode of the electric field to make the coupling frequency of the electric field less than or equal to 3.
In one embodiment of the present invention, the length of the electric field anode is selected to be 10-180 mm.
In one embodiment of the present invention, the length of the electric field anode is selected to be 60-180 mm.
In some embodiments of the present invention, there is provided a VOCs gas treatment apparatus comprising:
an inlet, an outlet, and a flow channel between the inlet and the outlet;
the ultraviolet device and the electric field device are sequentially arranged along the flow channel from the inlet to the outlet;
the electric field device comprises: the device comprises an electric field device inlet, an electric field device outlet, an electric field cathode and an electric field anode, wherein the electric field cathode and the electric field anode are used for generating an ionization dust removal electric field; the length of the electric field cathode is 30-180 mm.
In one embodiment of the present invention, the length of the electric field cathode is 54-176 mm.
In an embodiment of the present invention, the length of the electric field anode enables the coupling frequency of the ionization dust removal electric field to be less than or equal to 3.
In some embodiments of the present invention, a method for processing VOCs is provided, comprising the steps of:
carrying out UV treatment on the gas to obtain a product after VOCs are treated by UV;
performing electric field dust removal treatment on the product subjected to the UV treatment on the VOCs, and removing particulate matters in the product subjected to the UV treatment on the VOCs;
the electric field dust removal treatment also comprises a method for reducing the coupling of a dust removal electric field, and the method for reducing the coupling of the dust removal electric field comprises the following steps:
comprises selecting the length of the cathode of the electric field to make the coupling frequency of the electric field less than or equal to 3.
In one embodiment of the present invention, the length of the electric field cathode is selected to be 30-180 mm.
In one embodiment of the present invention, the method includes selecting the length of the electric field cathode to be 54-176 mm.
In some embodiments of the present invention, there is provided a VOCs gas treatment apparatus comprising: an inlet, an outlet, and a flow channel between the inlet and the outlet; the ultraviolet device and the electric field device are sequentially arranged along the flow channel from the inlet to the outlet; the electric field device comprises: the device comprises an electric field device inlet, an electric field device outlet, an electric field cathode and an electric field anode, wherein the electric field cathode and the electric field anode are used for generating an ionization dust removal electric field; the distance between the electric field anode and the electric field cathode is less than 150 mm.
In an embodiment of the present invention, the inter-polar distance between the electric field anode and the electric field cathode is 2.5-139.9 mm.
In an embodiment of the present invention, the inter-polar distance between the electric field anode and the electric field cathode is 5-100 mm.
In an embodiment of the present invention, the inter-polar distance between the electric field anode and the electric field cathode enables the coupling frequency of the ionization dust removal electric field to be less than or equal to 3.
In some embodiments of the present invention, a method for processing VOCs is provided, comprising the steps of:
carrying out UV treatment on the gas to obtain a product after VOCs are treated by UV;
performing electric field dust removal treatment on the product subjected to the UV treatment on the VOCs, and removing particulate matters in the product subjected to the UV treatment on the VOCs;
the electric field dust removal treatment also comprises a method for reducing the coupling of the dust removal electric field, and the method for reducing the coupling of the dust removal electric field comprises the following steps:
selecting the inter-polar distance between the electric field anode and the electric field cathode to ensure that the electric field coupling frequency is less than or equal to 3.
In an embodiment of the present invention, the distance between the anode and the cathode is selected to be 2.5-139.9 mm.
In an embodiment of the present invention, the distance between the anode and the cathode is selected to be 5-100 mm.
In an embodiment, the electric field dust removing method further includes: a method for reducing coupling of gas dust removal electric fields comprises the following steps:
passing the gas through an ionization dust removal electric field generated by an electric field anode and an electric field cathode;
the electric field anode or/and the electric field cathode are selected.
In an embodiment of the present invention, the size of the electric field anode and/or the electric field cathode is selected such that the number of electric field couplings is less than or equal to 3.
Specifically, the ratio of the dust collection area of the field anode to the discharge area of the field cathode is selected. Preferably, the ratio of the dust deposition area of the electric field anode to the discharge area of the electric field cathode is selected to be 1.667: 1-1680: 1.
more preferably, the ratio of the dust deposition area of the electric field anode to the discharge area of the electric field cathode is selected to be 6.67-56.67: 1.
in an embodiment of the present invention, the diameter of the electric field cathode is 1-3 mm, and the inter-polar distance between the electric field anode and the electric field cathode is 2.5-139.9 mm; the ratio of the dust deposition area of the electric field anode to the discharge area of the electric field cathode is 1.667: 1-1680: 1.
preferably, the inter-polar distance between the electric field anode and the electric field cathode is selected to be less than 150 mm.
Preferably, the distance between the electric field anode and the electric field cathode is selected to be 2.5-139.9 mm. More preferably, the pole spacing between the electric field anode and the electric field cathode is selected to be 5.0-100 mm.
Preferably, the length of the electric field anode is selected to be 10-180 mm. More preferably, the length of the electric field anode is selected to be 60-180 mm.
Preferably, the length of the electric field cathode is selected to be 30-180 mm. More preferably, the length of the electric field cathode is selected to be 54-176 mm.
In an embodiment of the present invention, the ratio of the dust deposition area of the electric field anode to the discharge area of the electric field cathode, the inter-polar distance between the electric field anode and the electric field cathode, the length of the electric field anode, and the length of the electric field cathode are selected such that the coupling frequency of the ionization dust removal electric field is less than or equal to 3.
In an embodiment of the invention, the length of the electric field anode can be 10-180mm, 10-20mm, 20-30mm, 60-180mm, 30-40mm, 40-50mm, 50-60mm, 60-70mm, 70-80mm, 80-90mm, 90-100mm, 100 + 110mm, 110 + 120mm, 120 + 130mm, 130 + 140mm, 140 + 150mm, 150 + 160mm, 160 + 170mm, 170 + 180mm, 60mm, 180mm, 10mm or 30 mm. The length of the electric field anode refers to the minimum length from one end of the working surface of the electric field anode to the other end. The length of the electric field anode is selected to effectively reduce electric field coupling.
In an embodiment of the invention, the length of the electric field anode can be 10-90mm, 15-20mm, 20-25mm, 25-30mm, 30-35mm, 35-40mm, 40-45mm, 45-50mm, 50-55mm, 55-60mm, 60-65mm, 65-70mm, 70-75mm, 75-80mm, 80-85mm or 85-90mm, and the design of the length can enable the electric field anode and the electric field device to have high temperature resistance and enable the electric field device to have high-efficiency dust collecting capacity under high-temperature impact.
In an embodiment of the invention, the length of the electric field cathode can be 30-180mm, 54-176mm, 30-40mm, 40-50mm, 50-54mm, 54-60mm, 60-70mm, 70-80mm, 80-90mm, 90-100mm, 100-110mm, 110-120mm, 120-130mm, 130-140mm, 140-150mm, 150-160mm, 160-170mm, 170-176mm, 170-180mm, 54mm, 180mm, or 30 mm. The length of the field cathode refers to the minimum length from one end of the working surface of the field cathode to the other. The length of the electric field cathode is selected to effectively reduce electric field coupling.
In an embodiment of the invention, the length of the electric field cathode can be 10-90mm, 15-20mm, 20-25mm, 25-30mm, 30-35mm, 35-40mm, 40-45mm, 45-50mm, 50-55mm, 55-60mm, 60-65mm, 65-70mm, 70-75mm, 75-80mm, 80-85mm or 85-90mm, and the design of the length can enable the electric field cathode and the electric field device to have high temperature resistance and enable the electric field device to have high-efficiency dust collecting capacity under high-temperature impact.
In one embodiment of the present invention, the distance between the electric field anode and the electric field cathode can be 5-30mm, 2.5-139.9mm, 9.9-139.9mm, 2.5-9.9mm, 9.9-20mm, 20-30mm, 30-40mm, 40-50mm, 50-60mm, 60-70mm, 70-80mm, 80-90mm, 90-100mm, 100-110mm, 110-120mm, 120-130mm, 130-139.9mm, 9.9mm, 139.9mm, or 2.5 mm. The distance between the electric field anode and the electric field cathode is also referred to as the pole pitch. The inter-polar distance specifically refers to the minimum vertical distance between the working surfaces of the electric field anode and the electric field cathode. The selection of the polar distance can effectively reduce the electric field coupling and enables the electric field device to have high temperature resistance.
In an embodiment of the present invention, the diameter of the electric field cathode is 1-3 mm, and the inter-polar distance between the electric field anode and the electric field cathode is 2.5-139.9 mm; the ratio of the dust deposition area of the electric field anode to the discharge area of the electric field cathode is 1.667: 1-1680: 1.
in some embodiments of the present invention, there is provided a VOCs gas processing apparatus, comprising: an inlet, an outlet, and a flow channel between the inlet and the outlet; the ultraviolet device and the electric field device are sequentially arranged along the flow channel from the inlet to the outlet; the electric field device comprises: the device comprises an electric field device inlet, an electric field device outlet, an electric field cathode and an electric field anode, wherein the electric field cathode and the electric field anode are used for generating an ionization dust removal electric field; the electric field device also comprises an auxiliary electric field unit which is used for generating an auxiliary electric field which is not parallel to the ionization dust removal electric field.
In some embodiments of the present invention, there is provided a VOCs gas processing apparatus, comprising: an inlet, an outlet, and a flow channel between the inlet and the outlet; the ultraviolet device and the electric field device are sequentially arranged along the flow channel from the inlet to the outlet; the electric field device comprises: the device comprises an electric field device inlet, an electric field device outlet, an electric field cathode and an electric field anode, wherein the electric field cathode and the electric field anode are used for generating an ionization dust removal electric field; the electric field device further comprises an auxiliary electric field unit, the ionization dust removal electric field comprises a flow channel, and the auxiliary electric field unit is used for generating an auxiliary electric field which is not perpendicular to the flow channel.
In an embodiment of the present invention, the auxiliary electric field unit includes a first electrode, and the first electrode of the auxiliary electric field unit is disposed at or near an inlet of the ionization dust-removal electric field.
In an embodiment of the invention, the first electrode is a cathode.
In an embodiment of the invention, the first electrode of the auxiliary electric field unit is an extension of the electric field cathode.
In an embodiment of the present invention, the first electrode of the auxiliary electric field unit has an included angle α with the electric field anode, and 0 ° < α ≦ 125 °, or 45 ° ≦ α ≦ 125 °, or 60 ° ≦ α ≦ 100 °, or α ≦ 90 °.
In an embodiment of the invention, the auxiliary electric field unit includes a second electrode, and the second electrode of the auxiliary electric field unit is disposed at or near the outlet of the ionization dust-removal electric field.
In an embodiment of the invention, the second electrode is an anode.
In an embodiment of the invention, the second electrode of the auxiliary electric field unit is an extension of the electric field anode.
In one embodiment of the present invention, the second electrode of the auxiliary electric field unit has an angle α with the electric field cathode, and 0 ° < α ≦ 125 °, or 45 ° ≦ α ≦ 125 °, or 60 ° ≦ α ≦ 100 °, or α ≦ 90 °.
In an embodiment of the present invention, the electrodes of the auxiliary electric field and the electrodes of the ionization dust-removing electric field are independently disposed.
In some embodiments of the present invention, the electric field dust removing method further includes a method of providing an auxiliary electric field, including the steps of:
passing a gas through a flow channel;
an auxiliary electric field is generated in the flow channel, and the auxiliary electric field is not perpendicular to the flow channel.
Wherein the auxiliary electric field ionizes the gas.
In an embodiment of the invention, the auxiliary electric field is generated by the auxiliary electric field unit.
In the present invention, the ionizing dust removing electric field between the electric field anode and the electric field cathode is also referred to as a first electric field. In an embodiment of the invention, a second electric field not parallel to the first electric field is formed between the electric field anode and the electric field cathode. In another embodiment of the present invention, the second electric field is not perpendicular to the flow channel of the ionization dust-removing electric field. The second electric field, also called auxiliary electric field, can be formed by one or two auxiliary electrodes, which can be placed at the inlet or outlet of the ionizing dusting electric field when the second electric field is formed by one auxiliary electrode, which can be charged negatively, or positively. When the auxiliary electrode is a cathode, the auxiliary electrode is arranged at or close to an inlet of the ionization dust removal electric field; the auxiliary electrode and the electric field anode form an included angle alpha, and the alpha is more than 0 degrees and less than or equal to 125 degrees, or more than or equal to 45 degrees and less than or equal to 125 degrees, or more than or equal to 60 degrees and less than or equal to 100 degrees, or more than or equal to 90 degrees. When the auxiliary electrode is an anode, the auxiliary electrode is arranged at or close to an outlet of the ionization dust removal electric field; the auxiliary electrode and the electric field cathode form an included angle alpha, and the alpha is more than 0 degrees and less than or equal to 125 degrees, or more than or equal to 45 degrees and less than or equal to 125 degrees, or more than or equal to 60 degrees and less than or equal to 100 degrees, or more than or equal to 90 degrees. When the second electric field is formed by two auxiliary electrodes, one of the auxiliary electrodes may be charged with a negative potential and the other auxiliary electrode may be charged with a positive potential; one auxiliary electrode may be placed at the entrance of the ionizing electric field and the other auxiliary electrode at the exit of the ionizing electric field. In addition, the auxiliary electrode may be a part of the electric field cathode or the electric field anode, that is, the auxiliary electrode may be formed by an extension of the electric field cathode or the electric field anode, in which case the lengths of the electric field cathode and the electric field anode are different. The auxiliary electrode may also be a single electrode, i.e. the auxiliary electrode may not be part of the electric field cathode or the electric field anode, in which case the voltage of the second electric field is different from the voltage of the first electric field and may be controlled individually according to the operating conditions. The auxiliary electrode comprises a first electrode and/or a second electrode in the auxiliary electric field unit.
The present invention, however, is not limited to the specific embodiments described herein.
Example 1
Fig. 1 is a schematic structural diagram of a gas dedusting system in an embodiment. The gas dust removal system 101 comprises an electric field device inlet 1011, an electric field device 1014 and an insulating mechanism 1015.
The electric field device 1014 comprises an electric field anode 10141 and an electric field cathode 10142 arranged in the electric field anode 10141, an asymmetric electrostatic field is formed between the electric field anode 10141 and the electric field cathode 10142, wherein after the gas enters the electric field device 1014, the gas is ionized due to the discharge of the electric field cathode 10142, so that the gas particles obtain negative charges, move towards the electric field anode 10141 and deposit on the electric field anode 10141.
Specifically, the electric field anode 10141 is composed of a honeycomb-shaped and hollow anode tube bundle group, and the shape of the end opening of the anode tube bundle is hexagonal.
The electric field cathode 10142 includes a plurality of electrode rods, which penetrate through each anode tube bundle in the anode tube bundle group in a one-to-one correspondence manner, wherein the electrode rods are in a needle shape, a polygonal shape, a burr shape, a threaded rod shape or a columnar shape. The ratio of the dust collection area of the electric field anode 10141 to the discharge area of the electric field cathode 10142 is 1680: 1, the distance between the electric field anode 10141 and the electric field cathode 10142 is 9.9mm, the length of the electric field anode 10141 is 60mm, and the length of the electric field cathode 10142 is 54 mm.
In this embodiment, the gas outlet end of the electric field cathode 10142 is lower than the gas outlet end of the electric field anode 10141, the gas inlet end of the electric field cathode 10142 is flush with the gas inlet end of the electric field anode 10141, an included angle α is formed between the outlet end of the electric field anode 10141 and the near outlet end of the electric field cathode 10142, and α ═ 90 °, so that an accelerating electric field is formed inside the electric field device 1014, and more substances to be processed can be collected.
The insulating mechanism 1015 includes an insulating portion and a heat insulating portion. The insulating part is made of ceramic materials or glass materials. The insulating part is an umbrella-shaped ceramic column or glass column string, or a columnar ceramic column or glass column string, and glaze is hung inside and outside the umbrella or inside and outside the column.
As shown in fig. 1, in an embodiment of the present invention, the electric field cathode 10142 is mounted on a cathode support plate 10143, and the cathode support plate 10143 and the electric field anode 10141 are connected through an insulating mechanism 1015. The insulating means 1015 is used for realizing the insulation between the cathode support plate 10143 and the electric field anode 10141. In one embodiment of the present invention, the field anode 10141 includes a first anode portion 101412 and a second anode portion 101411, i.e., the first anode portion 101412 is near the field device inlet and the second anode portion 101411 is near the field device outlet. The cathode support plate and the insulating mechanism are arranged between the first anode portion 101412 and the second anode portion 101411, that is, the insulating mechanism 1015 is arranged between the ionization electric field and the electric field cathode 10142, which can well support the electric field cathode 10142 and fix the electric field cathode 10142 relative to the electric field anode 10141, so that a set distance is maintained between the electric field cathode 10142 and the electric field anode 10141.
Example 2
The electric field generating unit in this embodiment can be applied to an electric field device, as shown in fig. 2, and includes an electric field anode 4051 and an electric field cathode 4052 for generating an electric field, where the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to two electrodes of a power supply, the power supply is a dc power supply, and the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to an anode and a cathode of the dc power supply. In this embodiment the electric field anode 4051 has a positive potential and the electric field cathode 4052 has a negative potential.
The dc power supply in this embodiment may be a dc high voltage power supply. The above-mentioned electric field anode 4051 and electric field cathode 4052 form a discharge electric field therebetween, which is an electrostatic field.
As shown in fig. 2, 3 and 4, in the present embodiment, the electric field anode 4051 has a hollow regular hexagonal tubular shape, the electric field cathode 4052 has a rod shape, and the electric field cathode 4052 is inserted into the electric field anode 4051.
A method of reducing electric field coupling comprising the steps of: the ratio of the dust collection area of the field anode 4051 to the discharge area of the field cathode 4052 was selected to be 6.67: 1, the inter-polar distance L3 between the electric field anode 4051 and the electric field cathode 4052 is 9.9mm, the length L1 of the electric field anode 4051 is 60mm, the length L2 of the electric field cathode 4052 is 54mm, the electric field anode 4051 includes a fluid channel, the fluid channel includes an inlet end and an outlet end, the electric field cathode 4052 is disposed in the fluid channel, the electric field cathode 4052 extends along the direction of the fluid channel of the dust collector, the inlet end of the electric field anode 4051 is flush with the near inlet end of the electric field cathode 4052, an included angle α is formed between the outlet end of the electric field anode 4051 and the near outlet end of the electric field cathode 4052, and α is 118 °, so that under the effects of the electric field anode 4051 and the electric field cathode 4052, more substances to be processed can be collected, the number of electric field coupling times is not more than 3, coupling consumption of the electric field to the gas to be processed can be reduced, and electric field electric energy can be saved by 30-50%.
The electric field device in the embodiment comprises a plurality of electric field stages formed by the electric field generating units, and the electric field stages are arranged in plurality, so that the dust collecting efficiency of the electric field device is effectively improved by utilizing a plurality of dust collecting units. In the same electric field level, the anodes of the electric fields have the same polarity, and the cathodes of the electric fields have the same polarity.
The electric field stages in the plurality of electric field stages are connected in series, the electric field stages in series are connected through the connecting shell, and the distance between the electric field stages of two adjacent stages is larger than 1.4 times of the inter-pole distance. As shown in fig. 5, the electric field level is two levels, i.e., a first level electric field and a second level electric field, and the first level electric field and the second level electric field are connected in series by the connecting housing.
The substance to be treated in this embodiment may be a particulate in the UV purified product.
Example 3
The electric field generating unit in this embodiment can be applied to an electric field device, as shown in fig. 2, and includes an electric field anode 4051 and an electric field cathode 4052 for generating an electric field, where the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to two electrodes of a power supply, the power supply is a dc power supply, and the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to an anode and a cathode of the dc power supply. In this embodiment the electric field anode 4051 has a positive potential and the electric field cathode 4052 has a negative potential.
The dc power supply in this embodiment may be a dc high voltage power supply. The above-mentioned electric field anode 4051 and electric field cathode 4052 form a discharge electric field therebetween, which is an electrostatic field.
In this embodiment, the electric field anode 4051 has a hollow regular hexagonal tube shape, the electric field cathode 4052 has a rod shape, and the electric field cathode 4052 is inserted into the electric field anode 4051.
A method of reducing electric field coupling comprising the steps of: the ratio of the dust collection area of the electric field anode 4051 to the discharge area of the electric field cathode 4052 was selected to be 1680: 1, the interpolar distance of electric field anode 4051 and electric field cathode 4052 is 139.9mm, and electric field anode 4051 length is 180mm, and electric field cathode 4052 length is 180mm, electric field anode 4051 includes the fluid passage, the fluid passage includes entrance end and exit end, electric field cathode 4052 arranges in the fluid passage, electric field cathode 4052 extends along the direction of collection dirt utmost point fluid passage, and the entrance end of electric field anode 4051 flushes with the nearly entrance end of electric field cathode 4052, and the exit end of electric field anode 4051 flushes with the nearly exit end of electric field cathode 4052, and then under the effect of electric field anode 4051 and electric field cathode 4052, can collect more matters of treating, realizes that electric field coupling number of times is less than or equal to 3, can reduce the coupling consumption of the electric field to the treatment gas, saves electric field electric energy 20-40%.
The substance to be treated in this example is a particulate material in the UV purified product.
Example 4
The electric field generating unit in this embodiment can be applied to an electric field device, as shown in fig. 2, and includes an electric field anode 4051 and an electric field cathode 4052 for generating an electric field, where the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to two electrodes of a power supply, the power supply is a dc power supply, and the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to an anode and a cathode of the dc power supply. In this embodiment the electric field anode 4051 has a positive potential and the electric field cathode 4052 has a negative potential.
The dc power supply in this embodiment may be a dc high voltage power supply. The above-mentioned electric field anode 4051 and electric field cathode 4052 form a discharge electric field therebetween, which is an electrostatic field.
In this embodiment, the electric field anode 4051 has a hollow regular hexagonal tube shape, the electric field cathode 4052 has a rod shape, and the electric field cathode 4052 is inserted into the electric field anode 4051.
A method of reducing electric field coupling comprising the steps of: the ratio of the dust collection area of the field anode 4051 to the discharge area of the field cathode 4052 was selected to be 1.667: 1, the interpolar distance of electric field anode 4051 and electric field cathode 4052 is 2.4mm, and electric field anode 4051 length is 30mm, and electric field cathode 4052 length is 30mm, electric field anode 4051 includes the fluid passage, the fluid passage includes entrance end and exit end, electric field cathode 4052 arranges in the fluid passage, electric field cathode 4052 extends along the direction of collection dirt utmost point fluid passage, and electric field anode 4051's entrance end flushes with electric field cathode 4052's nearly entrance end, and electric field anode 4051's exit end flushes with electric field cathode 4052's nearly exit end, and then under electric field anode 4051 and electric field cathode 4052's effect, can collect more matters of treating, realizes that electric field coupling number of times is less than or equal to 3, can reduce the electric field and treat the coupling consumption of treatment gas, saves electric field electric energy 10-30%.
The substance to be treated in this example is a particulate material in the UV purified product.
Example 5
The electric field generating unit in this embodiment can be applied to an electric field device, as shown in fig. 2, and includes an electric field anode 4051 and an electric field cathode 4052 for generating an electric field, where the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to two electrodes of a power supply, the power supply is a dc power supply, and the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to an anode and a cathode of the dc power supply. In this embodiment the electric field anode 4051 has a positive potential and the electric field cathode 4052 has a negative potential.
The dc power supply in this embodiment may be a dc high voltage power supply. The above-mentioned electric field anode 4051 and electric field cathode 4052 form a discharge electric field therebetween, which is an electrostatic field.
As shown in fig. 2, 3 and 4, in the present embodiment, the electric field anode 4051 has a hollow regular hexagonal tube shape, the electric field cathode 4052 has a rod shape, the electric field cathode 4052 is inserted into the electric field anode 4051, and the ratio of the dust collection area of the electric field anode 4051 to the discharge area of the electric field cathode 4052 is 6.67: 1, the inter-polar distance between the electric field anode 4051 and the electric field cathode 4052 is 9.9mm, the length of the electric field anode 4051 is 60mm, the length of the electric field cathode 4052 is 54mm, the electric field anode 4051 includes a fluid channel, the fluid channel includes an inlet end and an outlet end, the electric field cathode 4052 is disposed in the fluid channel, the electric field cathode 4052 extends along the direction of the dust collecting electrode fluid channel, the inlet end of the electric field anode 4051 is flush with the near inlet end of the electric field cathode 4052, an included angle α is formed between the outlet end of the electric field anode 4051 and the near outlet end of the electric field cathode 4052, and α is 118 °, so that under the action of the electric field anode 4051 and the electric field cathode 4052, more substances to be treated can be collected, and the dust collecting efficiency of the electric field generating unit is ensured to be higher, the dust collecting efficiency of the typical particle pm is 0.23%, and the removal efficiency of the typical 23nm particle is 99.99%.
The electric field device in the embodiment comprises a plurality of electric field stages formed by the electric field generating units, and the electric field stages are arranged in plurality, so that the dust collecting efficiency of the electric field device is effectively improved by utilizing a plurality of dust collecting units. In the same electric field level, the anodes of the electric fields have the same polarity, and the cathodes of the electric fields have the same polarity.
The electric field stages in the plurality of electric field stages are connected in series, the electric field stages in series are connected through the connecting shell, and the distance between the electric field stages of two adjacent stages is larger than 1.4 times of the inter-pole distance. As shown in fig. 5, the electric field levels are two stages, a first stage electric field 4053 and a second stage electric field 4054, and the first stage electric field 4053 and the second stage electric field 4054 are connected in series by a connecting housing 4055.
The substance to be treated in this example is a particulate material in the UV purified product.
Example 6
The electric field generating unit in this embodiment can be applied to an electric field device, as shown in fig. 2, and includes an electric field anode 4051 and an electric field cathode 4052 for generating an electric field, where the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to two electrodes of a power supply, the power supply is a dc power supply, and the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to an anode and a cathode of the dc power supply. In this embodiment the electric field anode 4051 has a positive potential and the electric field cathode 4052 has a negative potential.
The dc power supply in this embodiment may be a dc high voltage power supply. The above-mentioned electric field anode 4051 and electric field cathode 4052 form a discharge electric field therebetween, which is an electrostatic field.
In this embodiment, the electric field anode 4051 has a hollow regular hexagonal tube shape, the electric field cathode 4052 has a rod shape, the electric field cathode 4052 is inserted into the electric field anode 4051, and the ratio of the dust collecting area of the electric field anode 4051 to the discharging area of the electric field cathode 4052 is 1680: 1, the interpole of electric field anode 4051 and electric field cathode 4052 is 139.9mm, and electric field anode 4051 is 180mm in length, and electric field cathode 4052 is 180mm in length, electric field anode 4051 includes the fluid passageway, the fluid passageway includes entrance end and exit end, electric field cathode 4052 arranges in the fluid passageway, electric field cathode 4052 extends along the direction of collection dirt utmost point fluid passageway, and the entrance end of electric field anode 4051 flushes with the nearly entrance end of electric field cathode 4052, and the exit end of electric field anode 4051 flushes with the nearly exit end of electric field cathode 4052, and then under the effect of electric field anode 4051 and electric field cathode 4052, can collect more the material of treating, guarantees that this electric field device's collection dust efficiency is higher, and typical granule pm 0.23 collection efficiency is 99.99%, and typical 23nm granule removal efficiency is 99.99%.
The electric field device in the embodiment comprises a plurality of electric field stages formed by the electric field generating units, and the electric field stages are arranged in plurality, so that the dust collecting efficiency of the electric field device is effectively improved by utilizing a plurality of dust collecting units. In the same electric field level, the anodes of the electric fields have the same polarity, and the cathodes of the electric fields have the same polarity.
The substance to be treated in this example is a particulate material in the UV purified product.
Example 7
The electric field generating unit in this embodiment can be applied to an electric field device, as shown in fig. 2, and includes an electric field anode 4051 and an electric field cathode 4052 for generating an electric field, where the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to two electrodes of a power supply, the power supply is a dc power supply, and the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to an anode and a cathode of the dc power supply. In this embodiment the electric field anode 4051 has a positive potential and the electric field cathode 4052 has a negative potential.
The dc power supply in this embodiment may be a dc high voltage power supply. The above-mentioned electric field anode 4051 and electric field cathode 4052 form a discharge electric field therebetween, which is an electrostatic field.
In this embodiment, the field anode 4051 has a hollow regular hexagonal tube shape, the field cathode 4052 has a rod shape, the field cathode 4052 is inserted into the field anode 4051, and the ratio of the dust collection area of the field anode 4051 to the discharge area of the field cathode 4052 is 1.667: 1, the distance between the poles of the electric field anode 4051 and the electric field cathode 4052 is 2.4 mm. The length of the electric field anode 4051 is 30mm, the length of the electric field cathode 4052 is 30mm, the electric field anode 4051 comprises a fluid channel, the fluid channel comprises an inlet end and an outlet end, the electric field cathode 4052 is arranged in the fluid channel, the electric field cathode 4052 extends along the direction of the fluid channel of the dust collector, the inlet end of the electric field anode 4051 is flush with the near inlet end of the electric field cathode 4052, the outlet end of the electric field anode 4051 is flush with the near outlet end of the electric field cathode 4052, and further under the action of the electric field anode 4051 and the electric field cathode 4052, more substances to be treated can be collected, the dust collection efficiency of the electric field device is ensured to be higher, the dust collection efficiency of typical particles pm 0.23 is 99.99%, and the removal efficiency of typical particles 23nm is 99.99%.
In this embodiment, the electric field anode 4051 and the electric field cathode 4052 constitute a plurality of dust collecting units, so that the dust collecting efficiency of the electric field apparatus can be effectively improved by using a plurality of dust collecting units.
The substance to be treated in this example is a particulate material in the UV purified product.
Example 8
The electric field generating unit in this embodiment can be applied to an electric field device, as shown in fig. 2, and includes an electric field anode 4051 and an electric field cathode 4052 for generating an electric field, where the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to two electrodes of a power supply, the power supply is a dc power supply, and the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to an anode and a cathode of the dc power supply. In this embodiment the electric field anode 4051 has a positive potential and the electric field cathode 4052 has a negative potential.
The dc power supply in this embodiment may be a dc high voltage power supply. The above-mentioned electric field anode 4051 and electric field cathode 4052 form a discharge electric field therebetween, which is an electrostatic field.
In this embodiment, the electric field anode 4051 is in the shape of a hollow regular hexagonal tube, the electric field cathode 4052 is in the shape of a rod, the electric field cathode 4052 is inserted into the electric field anode 4051, the length of the electric field anode 4051 is 5cm, the length of the electric field cathode 4052 is 5cm, the field anode 4051 comprises a fluid channel comprising an inlet end and an outlet end, the field cathode 4052 is disposed in the fluid passageway, the field cathode 4052 extends in the direction of the collector fluid passageway, the inlet end of the field anode 4051 is flush with the proximal inlet end of the field cathode 4052, the outlet end of the field anode 4051 is flush with the proximal outlet end of the field cathode 4052, the electric field anode 4051 and the electric field cathode 4052 have a pole pitch of 9.9mm, and then the electric field anode 4051 and the electric field cathode 4052 can resist high temperature impact, and more substances to be treated can be collected, so that the dust collection efficiency of the electric field generation unit is higher. The dust collection efficiency is 99.9% corresponding to the electric field temperature of 200 ℃; the dust collection efficiency is 90% corresponding to the electric field temperature of 400 ℃; the electric field temperature of 500 ℃ corresponds to a dust collecting efficiency of 50%.
The electric field device in the embodiment comprises a plurality of electric field stages formed by the electric field generating units, and the electric field stages are arranged in plurality, so that the dust collecting efficiency of the electric field device is effectively improved by utilizing a plurality of dust collecting units. In the same electric field level, the anodes of the electric fields have the same polarity, and the cathodes of the electric fields have the same polarity.
The substance to be treated in this embodiment may be a particulate in the UV purified product.
Example 9
The electric field generating unit in this embodiment can be applied to an electric field device, as shown in fig. 2, and includes an electric field anode 4051 and an electric field cathode 4052 for generating an electric field, where the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to two electrodes of a power supply, the power supply is a dc power supply, and the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to an anode and a cathode of the dc power supply. In this embodiment the electric field anode 4051 has a positive potential and the electric field cathode 4052 has a negative potential.
The dc power supply in this embodiment may be a dc high voltage power supply. The above-mentioned electric field anode 4051 and electric field cathode 4052 form a discharge electric field therebetween, which is an electrostatic field.
In this embodiment, the electric field anode 4051 is in the shape of a hollow regular hexagonal tube, the electric field cathode 4052 is in the shape of a rod, the electric field cathode 4052 is inserted into the electric field anode 4051, the length of the electric field anode 4051 is 9cm, the length of the electric field cathode 4052 is 9cm, the field anode 4051 comprises a fluid channel comprising an inlet end and an outlet end, the field cathode 4052 is disposed in the fluid passageway, the field cathode 4052 extends in the direction of the collector fluid passageway, the inlet end of the field anode 4051 is flush with the proximal inlet end of the field cathode 4052, the outlet end of the field anode 4051 is flush with the proximal outlet end of the field cathode 4052, the electric field anode 4051 and the electric field cathode 4052 have a pole pitch of 139.9mm, and then the electric field anode 4051 and the electric field cathode 4052 can resist high temperature impact, and more substances to be treated can be collected, so that the dust collection efficiency of the electric field generation unit is higher. The dust collection efficiency is 99.9% corresponding to the electric field temperature of 200 ℃; the dust collection efficiency is 90% corresponding to the electric field temperature of 400 ℃; the electric field temperature of 500 ℃ corresponds to a dust collecting efficiency of 50%.
The electric field device in the embodiment comprises a plurality of electric field stages formed by the electric field generating units, and the electric field stages are arranged in plurality, so that the dust collecting efficiency of the electric field device is effectively improved by utilizing a plurality of dust collecting units. In the same electric field level, the anodes of the storage electric fields are of the same polarity, and the cathodes of the storage electric fields are of the same polarity.
The substance to be treated in this example is a particulate material in the UV purified product.
Example 10
The electric field generating unit in this embodiment can be applied to an electric field device, as shown in fig. 2, and includes an electric field anode 4051 and an electric field cathode 4052 for generating an electric field, where the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to two electrodes of a power supply, the power supply is a dc power supply, and the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to an anode and a cathode of the dc power supply. In this embodiment the electric field anode 4051 has a positive potential and the electric field cathode 4052 has a negative potential.
The dc power supply in this embodiment may be a dc high voltage power supply. The above-mentioned electric field anode 4051 and electric field cathode 4052 form a discharge electric field therebetween, which is an electrostatic field.
In this embodiment, the electric field anode 4051 is in the shape of a hollow regular hexagonal tube, the electric field cathode 4052 is in the shape of a rod, the electric field cathode 4052 is inserted into the electric field anode 4051, the length of the electric field anode 4051 is 1cm, the length of the electric field cathode 4052 is 1cm, the field anode 4051 comprises a fluid channel comprising an inlet end and an outlet end, the field cathode 4052 is disposed in the fluid passageway, the field cathode 4052 extends in the direction of the collector fluid passageway, the inlet end of the field anode 4051 is flush with the proximal inlet end of the field cathode 4052, the outlet end of the field anode 4051 is flush with the proximal outlet end of the field cathode 4052, the electric field anode 4051 and the electric field cathode 4052 have a pole pitch of 2.4mm, and then the electric field anode 4051 and the electric field cathode 4052 can resist high temperature impact, and more substances to be treated can be collected, so that the dust collection efficiency of the electric field generation unit is higher. The dust collection efficiency is 99.9% corresponding to the electric field temperature of 200 ℃; the dust collection efficiency is 90% corresponding to the electric field temperature of 400 ℃; the electric field temperature of 500 ℃ corresponds to a dust collecting efficiency of 50%.
The electric field device in the embodiment comprises a plurality of electric field stages formed by the electric field generating units, and the electric field stages are arranged in plurality, so that the dust collecting efficiency of the electric field device is effectively improved by utilizing a plurality of dust collecting units. In the same electric field level, the anodes of the electric fields have the same polarity, and the cathodes of the electric fields have the same polarity.
The electric field stages in the plurality of electric field stages are connected in series, the electric field stages in series are connected through the connecting shell, and the distance between the electric field stages of two adjacent stages is larger than 1.4 times of the inter-pole distance. The electric field level is two levels, namely a first level electric field and a second level electric field, and the first level electric field and the second level electric field are connected in series through a connecting shell.
The substance to be treated in this example is a particulate material in the UV purified product.
Example 11
The electric field generating unit in this embodiment can be applied to an electric field device, as shown in fig. 2, and includes an electric field anode 4051 and an electric field cathode 4052 for generating an electric field, where the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to two electrodes of a power supply, the power supply is a dc power supply, and the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to an anode and a cathode of the dc power supply. In this embodiment the electric field anode 4051 has a positive potential and the electric field cathode 4052 has a negative potential.
The dc power supply in this embodiment may be a dc high voltage power supply. The above-mentioned electric field anode 4051 and electric field cathode 4052 form a discharge electric field therebetween, which is an electrostatic field.
As shown in fig. 2 and 3, in the present embodiment, the electric field anode 4051 is in the shape of a hollow regular hexagon tube, the electric field cathode 4052 is in the shape of a rod, the electric field cathode 4052 is inserted into the electric field anode 4051, the electric field anode 4051 has a length of 3cm, the electric field cathode 4052 has a length of 2cm, the electric field anode 4051 includes a fluid channel, the fluid channel includes an inlet end and an outlet end, the electric field cathode 4052 is disposed in the fluid channel, the electric field cathode 4052 extends along the direction of the dust collecting pole fluid channel, the inlet end of the electric field anode 4051 is flush with the proximal inlet end of the electric field cathode 4052, the outlet end of the electric field anode 4051 and the proximal outlet end of the electric field cathode 4052 have an included angle α, and α is 90 °, the distance between the electric field anode 4051 and the electric field cathode 4052 is 20mm, and the electric field anode 4051 and the electric field cathode 4052 are further configured to resist high temperature impact and collect more substances to be treated, the dust collection efficiency of the electric field generation unit is ensured to be higher. The dust collection efficiency is 99.9% corresponding to the electric field temperature of 200 ℃; the dust collection efficiency is 90% corresponding to the electric field temperature of 400 ℃; the electric field temperature of 500 ℃ corresponds to a dust collecting efficiency of 50%.
The electric field device in the embodiment comprises a plurality of electric field stages formed by the electric field generating units, and the electric field stages are arranged in plurality, so that the dust collecting efficiency of the electric field device is effectively improved by utilizing a plurality of dust collecting units. In the same electric field stage, the dust collectors have the same polarity, and the discharge electrodes have the same polarity.
The electric field stages in the plurality of electric field stages are connected in series, the electric field stages in series are connected through the connecting shell, and the distance between the electric field stages of two adjacent stages is larger than 1.4 times of the inter-pole distance. As shown in fig. 5, the electric field level is two levels, i.e., a first level electric field and a second level electric field, and the first level electric field and the second level electric field are connected in series by the connecting housing.
The substance to be treated in this embodiment may be a particulate in the UV purified product.
Example 12
The electric field generating unit in this embodiment can be applied to an electric field device, as shown in fig. 2, and includes an electric field anode 4051 and an electric field cathode 4052 for generating an electric field, where the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to two electrodes of a power supply, the power supply is a dc power supply, and the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to an anode and a cathode of the dc power supply. In this embodiment the electric field anode 4051 has a positive potential and the electric field cathode 4052 has a negative potential.
The dc power supply in this embodiment may be a dc high voltage power supply. The above-mentioned electric field anode 4051 and electric field cathode 4052 form a discharge electric field therebetween, which is an electrostatic field.
In this embodiment, the electric field anode 4051 has a hollow regular hexagonal tube shape, the electric field cathode 4052 has a rod shape, and the electric field cathode 4052 is inserted into the electric field anode 4051.
A method of reducing electric field coupling comprising the steps of: the ratio of the dust collecting area of the electric field anode 4051 to the discharging area of the electric field cathode 4052 is selected to be 27.566:1, the pole pitch between the electric field anode 4051 and the electric field cathode 4052 is 2.3mm, the length of the electric field anode 4051 is 5mm, the length of the electric field cathode 4052 is 4mm, the electric field anode 4051 comprises a fluid channel, the fluid channel comprises an inlet end and an outlet end, the electric field cathode 4052 is arranged in the fluid channel, the electric field cathode 4052 extends along the direction of the dust collecting pole fluid channel, the inlet end of the electric field anode 4051 is flush with the near inlet end of the electric field cathode 4052, the outlet end of the electric field anode 4051 is flush with the near outlet end of the electric field cathode 4052, and further under the action of the electric field anode 4051 and the electric field cathode 4052, more substances to be processed can be collected, the number of electric field coupling times is less than or equal to 3, and the dust collecting efficiency of the electric field generating unit is ensured to be higher.
The substance to be treated in this embodiment may be a particulate in the UV purified product.
Example 13
The electric field generating unit in this embodiment can be applied to an electric field device, as shown in fig. 2, and includes an electric field anode 4051 and an electric field cathode 4052 for generating an electric field, where the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to two electrodes of a power supply, the power supply is a dc power supply, and the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to an anode and a cathode of the dc power supply. In this embodiment the electric field anode 4051 has a positive potential and the electric field cathode 4052 has a negative potential.
The dc power supply in this embodiment may be a dc high voltage power supply. The above-mentioned electric field anode 4051 and electric field cathode 4052 form a discharge electric field therebetween, which is an electrostatic field.
In this embodiment, the electric field anode 4051 has a hollow regular hexagonal tube shape, the electric field cathode 4052 has a rod shape, and the electric field cathode 4052 is inserted into the electric field anode 4051.
A method of reducing electric field coupling comprising the steps of: the ratio of the dust collecting area of the electric field anode 4051 to the discharge area of the electric field cathode 4052 was selected to be 1.108:1, the inter-pole distance between the electric field anode 4051 and the electric field cathode 4052 was 2.3mm, the electric field anode: the length of utmost point 051 is 60mm, and electric field cathode 4052 length is 200mm, electric field anode 4051 includes fluid passage, fluid passage includes entrance end and exit end, electric field cathode 4052 arranges in the fluid passage, electric field cathode 4052 extends along the direction of collection utmost point fluid passage, and electric field anode 4051's entrance point flushes with electric field cathode 4052's nearly entrance end, and electric field anode 4051's exit end flushes with electric field cathode 4052's nearly exit end, and then under electric field anode 4051 and electric field cathode 4052's effect, can collect more pending material, realizes that electric field coupling number of times is less than or equal to 3, guarantees that this electric field generating unit's dust collection efficiency is higher.
The substance to be treated in this embodiment may be a particulate in the UV purified product.
Example 14
The electric field generating unit in this embodiment can be applied to an electric field device, as shown in fig. 2, and includes an electric field anode 4051 and an electric field cathode 4052 for generating an electric field, where the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to two electrodes of a power supply, the power supply is a dc power supply, and the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to an anode and a cathode of the dc power supply. In this embodiment the electric field anode 4051 has a positive potential and the electric field cathode 4052 has a negative potential.
The dc power supply in this embodiment may be a dc high voltage power supply. Between the above-mentioned electric field anode 4051 and electric field cathode 4052, a discharge electric field is formed, which is an electrostatic field.
In this embodiment, the electric field anode 4051 has a hollow regular hexagonal tube shape, the electric field cathode 4052 has a rod shape, and the electric field cathode 4052 is inserted into the electric field anode 4051.
A method of reducing electric field coupling comprising the steps of: the ratio of the dust collection area of the electric field anode 4051 to the discharge area of the electric field cathode 4052 was selected as 3065: 1, the interpolar distance of electric field anode 4051 and electric field cathode 4052 is 249mm, and electric field anode 4051 length is 2000mm, and electric field cathode 4052 length is 180mm, electric field anode 4051 includes fluid passage, fluid passage includes entrance end and exit end, electric field cathode 4052 arranges in fluid passage, electric field cathode 4052 extends along the direction of collection dirt utmost point fluid passage, and electric field anode 4051's entrance end flushes with electric field cathode 4052's nearly entrance end, and electric field anode 4051's exit end flushes with electric field cathode 4052's nearly exit end, and then under electric field anode 4051 and electric field cathode 4052's effect, can collect more pending material, realizes that the electric field coupling number of times is less than or equal to 3, guarantees that this electric field generating unit's dust collection efficiency is higher.
The substance to be treated in this embodiment may be a particulate in the UV purified product.
Example 15
The electric field generating unit in this embodiment can be applied to an electric field device, as shown in fig. 2, and includes an electric field anode 4051 and an electric field cathode 4052 for generating an electric field, where the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to two electrodes of a power supply, the power supply is a dc power supply, and the electric field anode 4051 and the electric field cathode 4052 are respectively electrically connected to an anode and a cathode of the dc power supply. In this embodiment the electric field anode 4051 has a positive potential and the electric field cathode 4052 has a negative potential.
The dc power supply in this embodiment may be a dc high voltage power supply. The above-mentioned electric field anode 4051 and electric field cathode 4052 form a discharge electric field therebetween, which is an electrostatic field.
In this embodiment, the electric field anode 4051 has a hollow regular hexagonal tube shape, the electric field cathode 4052 has a rod shape, and the electric field cathode 4052 is inserted into the electric field anode 4051.
A method of reducing electric field coupling comprising the steps of: the ratio of the dust collecting area of the electric field anode 4051 to the discharging area of the electric field cathode 4052 is 1.338:1, the pole pitch between the electric field anode 4051 and the electric field cathode 4052 is 5mm, the length of the electric field anode 4051 is 2mm, the length of the electric field cathode 4052 is 10mm, the electric field anode 4051 comprises a fluid channel, the fluid channel comprises an inlet end and an outlet end, the electric field cathode 4052 is arranged in the fluid channel, the electric field cathode 4052 extends along the direction of the dust collecting pole fluid channel, the inlet end of the electric field anode 4051 is flush with the near inlet end of the electric field cathode 4052, the outlet end of the electric field anode 4051 is flush with the near outlet end of the electric field cathode 4052, and further under the action of the electric field anode 4051 and the electric field cathode 4052, more substances to be processed can be collected, the number of electric field coupling times is less than or equal to 3, and the dust collecting efficiency of the electric field generating unit is higher.
The substance to be treated in this embodiment may be a particulate in the UV purified product.
Example 16
The electric field device in this embodiment can be applied to the purification of VOCs, and includes an electric field cathode 5081 and an electric field anode 5082 electrically connected to the cathode and the anode of the dc power supply, respectively, and an auxiliary electrode 5083 electrically connected to the anode of the dc power supply. In this embodiment the electric field cathode 5081 has a negative potential and the electric field anode 5082 and the auxiliary electrode 5083 each have a positive potential.
Meanwhile, as shown in fig. 6, the auxiliary electrode 5083 is fixed to the field anode 5082 in this embodiment. After the electric field anode 5082 is electrically connected to the anode of the dc power source, the auxiliary electrode 5083 is also electrically connected to the anode of the dc power source, and the auxiliary electrode 5083 and the electric field anode 5082 have the same positive potential.
As shown in fig. 6, the auxiliary electrode 5083 may extend in the front-rear direction in the present embodiment, i.e., the length direction of the auxiliary electrode 5083 may be the same as the length direction of the electric field anode 5082.
As shown in fig. 6, in this embodiment, the electric field anode 5082 has a tubular shape, the electric field cathode 5081 has a rod shape, and the electric field cathode 5081 is inserted into the electric field anode 5082. In this embodiment, the auxiliary electrode 5083 is also tubular, and the auxiliary electrode 5083 and the field anode 5082 form an anode tube 5084. The front end of the anode tube 5084 is flush with the field cathode 5081, and the rear end of the anode tube 5084 is rearward beyond the rear end of the field cathode 5081, and the portion of the anode tube 5084 rearward beyond the field cathode 5081 is the auxiliary electrode 5083. That is, in the present embodiment, the electric field anode 5082 and the electric field cathode 5081 have the same length, and the electric field anode 5082 and the electric field cathode 5081 are opposite to each other in position in the front-rear direction; the auxiliary electrode 5083 is located behind the electric field anode 5082 and the electric field cathode 5081. Thus, an auxiliary electric field is formed between the auxiliary electrode 5083 and the field cathode 5081, and the auxiliary electric field applies a backward force to the negatively charged oxygen ion stream between the field anode 5082 and the field cathode 5081. When the gas containing the substances to be treated flows into the anode tube 5084 from front to back, the oxygen ions with negative charges are combined with the substances to be treated in the process of moving towards the electric field anode 5082 and backwards, and because the oxygen ions have backward moving speed, the oxygen ions are combined with the substances to be treated, and strong collision cannot be generated between the oxygen ions and the substances to be treated, so that the larger energy consumption caused by the strong collision is avoided, the oxygen ions are easily combined with the substances to be treated, the charging efficiency of the substances to be treated in the gas is higher, further, under the action of the electric field anode 5082 and the anode tube 5084, more substances to be treated can be collected, and the higher dust removal efficiency of the electric field device is ensured.
In addition, as shown in fig. 6, in the present embodiment, an angle α is formed between the rear end of the anode 5084 and the rear end of the electric field cathode 5081, and 0 ° < α ≦ 125 °, or 45 ° ≦ α ≦ 125 °, or 60 ° ≦ α ≦ 100 °, or α ≦ 90 °.
In this embodiment, the electric field anode 5082, the auxiliary electrode 5083, and the electric field cathode 5081 form a plurality of dust removing units, so as to effectively improve the dust removing efficiency of the electric field apparatus.
In this embodiment, the substance to be treated is a particulate matter in the gas product of UV purified VOCs.
The dc power supply in this embodiment may be a dc high voltage power supply. A discharge electric field, which is an electrostatic field, is formed between the electric field cathode 5081 and the electric field anode 5082. In the absence of the auxiliary electrode 5083, the ion flow in the electric field between the electric field cathode 5081 and the electric field anode 5082 is perpendicular to the electrode direction, and turns back and forth between the electrodes to flow, and causes the ions to turn back and forth between the electrodes to be consumed. Therefore, in this embodiment, the auxiliary electrode 5083 is used to shift the relative positions of the electrodes, so that the relative imbalance between the electric field anode 5082 and the electric field cathode 5081 is formed, which deflects the ion current in the electric field. In the electric field device, an auxiliary electrode 5083 forms an electric field that can provide an ion flow with directionality.
Example 17
The electric field device in this embodiment can be applied to VOCs gas purification, including electric field negative pole and electric field positive pole respectively with DC power supply's negative pole and positive pole electric connection, auxiliary electrode and DC power supply's negative pole electric connection. In this embodiment, the auxiliary electrode and the electric field cathode have negative potentials, and the electric field anode has a positive potential.
In this embodiment, the auxiliary electrode can be fixed to the cathode of the electric field. Thus, after the electric field cathode is electrically connected with the cathode of the direct current power supply, the auxiliary electrode is also electrically connected with the cathode of the direct current power supply. Meanwhile, the auxiliary electrode extends in the front-rear direction in the present embodiment.
In this embodiment, the electric field anode is tubular, the electric field cathode is rod-shaped, and the electric field cathode is arranged in the electric field anode in a penetrating manner. In the present embodiment, the auxiliary electrode is also in the form of a rod, and the auxiliary electrode and the electric field cathode form a cathode rod. The front end of the cathode bar is extended forward beyond the front end of the electric field anode, and the part of the cathode bar extended forward beyond the electric field anode is the auxiliary electrode. That is, the length of the electric field anode is the same as that of the electric field cathode in the present embodiment, and the electric field anode and the electric field cathode are opposite in position in the front-back direction; the auxiliary electrode is positioned in front of the electric field anode and the electric field cathode. Thus, an auxiliary electric field is formed between the auxiliary electrode and the electric field anode, and the auxiliary electric field applies backward force to the negatively charged oxygen ion flow between the electric field anode and the electric field cathode, so that the negatively charged oxygen ion flow between the electric field anode and the electric field cathode has backward moving speed. When the gas containing the substances to be treated flows into the tubular electric field anode from front to back, the negatively charged oxygen ions are combined with the substances to be treated in the process of moving towards the electric field anode and backwards, and because the oxygen ions have backward moving speed, the oxygen ions are combined with the substances to be treated, and strong collision cannot be generated between the oxygen ions and the substances to be treated, so that the larger energy consumption caused by strong collision is avoided, the oxygen ions are easily combined with the substances to be treated, the charging efficiency of the substances to be treated in the gas is higher, and further, under the action of the electric field anode, more substances to be treated can be collected, and the higher dust removal efficiency of the electric field device is ensured.
In this embodiment, the electric field anode, the auxiliary electrode, and the electric field cathode form a plurality of dust removing units, so as to effectively improve the dust removing efficiency of the electric field apparatus by using the plurality of dust removing units.
The above-mentioned substances to be treated in this example are the products of UV purification of VOCs.
Example 18
As shown in fig. 7, the electric field device in this embodiment can be applied to UV ultraviolet light to purify VOCs gas and then remove particles in the UV purified product, and the auxiliary electrode 5083 extends in the left-right direction. In this embodiment, the length direction of the auxiliary electrode 5083 is different from the length direction of the electric field anode 5082 and the electric field cathode 5081. And the auxiliary electrode 5083 may be specifically perpendicular to the field anode 5082.
In this embodiment, the electric field cathode 5081 and the electric field anode 5082 are electrically connected to the cathode and the anode of the dc power supply, respectively, and the auxiliary electrode 5083 is electrically connected to the anode of the dc power supply. In this embodiment the electric field cathode 5081 has a negative potential and the electric field anode 5082 and the auxiliary electrode 5083 each have a positive potential.
As shown in fig. 7, in the present embodiment, the electric field cathode 5081 and the electric field anode 5082 are opposed to each other in the front-rear direction, and the auxiliary electrode 5083 is located behind the electric field anode 5082 and the electric field cathode 5081. Thus, an auxiliary electric field is formed between the auxiliary electrode 5083 and the field cathode 5081, and the auxiliary electric field applies a backward force to the negatively charged oxygen ion stream between the field anode 5082 and the field cathode 5081, so that the negatively charged oxygen ion stream between the field anode 5082 and the field cathode 5081 has a backward moving velocity. When gas containing substances to be treated flows into an electric field between the electric field anode 5082 and the electric field cathode 5081 from front to back, oxygen ions with negative charges are combined with the substances to be treated in the process of moving towards the electric field anode 5082 and backwards, and the oxygen ions have backward moving speed, so that the oxygen ions are combined with the substances to be treated, and strong collision cannot be generated between the oxygen ions and the substances to be treated, thereby avoiding larger energy consumption caused by strong collision, enabling the oxygen ions to be easily combined with the substances to be treated, enabling the charging efficiency of the substances to be treated in the gas to be higher, further being capable of collecting more substances to be treated under the action of the electric field anode 5082, and ensuring that the dust removal efficiency of the electric field device is higher.
Example 19
As shown in fig. 8, the electric field device of the present embodiment is applicable to the purification process of VOCs, and the auxiliary electrodes 5083 extend in the left-right direction. In this embodiment, the length direction of the auxiliary electrode 5083 is different from the length direction of the electric field anode 5082 and the electric field cathode 5081. And the auxiliary electrode 5083 may be specifically perpendicular to the field cathode 5081.
In this embodiment, the electric field cathode 5081 and the electric field anode 5082 are electrically connected to the cathode and the anode of the dc power supply, respectively, and the auxiliary electrode 5083 is electrically connected to the cathode of the dc power supply. In this embodiment, the electric field cathode 5081 and the auxiliary electrode 5083 each have a negative potential, and the electric field anode 5082 has a positive potential.
As shown in fig. 8, in the present embodiment, the electric field cathode 5081 and the electric field anode 5082 are opposed to each other in the front-rear direction, and the auxiliary electrode 5083 is positioned in front of the electric field anode 5082 and the electric field cathode 5081. Thus, an auxiliary electric field is formed between the auxiliary electrode 5083 and the field anode 5082, and the auxiliary electric field applies a backward force to the negatively charged oxygen ion stream between the field anode 5082 and the field cathode 5081, so that the negatively charged oxygen ion stream between the field anode 5082 and the field cathode 5081 has a backward moving velocity. When gas containing substances to be treated flows into an electric field between the electric field anode 5082 and the electric field cathode 5081 from front to back, oxygen ions with negative charges are combined with the substances to be treated in the process of moving towards the electric field anode 5082 and backwards, and the oxygen ions have backward moving speed, so that the oxygen ions are combined with the substances to be treated, and strong collision cannot be generated between the oxygen ions and the substances to be treated, thereby avoiding larger energy consumption caused by strong collision, enabling the oxygen ions to be easily combined with the substances to be treated, enabling the charging efficiency of the substances to be treated in the gas to be higher, further being capable of collecting more substances to be treated under the action of the electric field anode 5082, and ensuring that the dust removal efficiency of the electric field device is higher.
Example 20UV photolysis + ionization dust removal
The embodiment provides a method for treating VOCs gas, which comprises the following steps:
carrying out UV purification treatment on the gas containing VOCs to obtain a product after VOCs is treated by UV;
and (4) performing electric field dust removal treatment on the product subjected to the UV treatment of the VOCs, and removing particulate matters in the product subjected to the UV treatment of the VOCs.
In this embodiment, the electric field dust removal processing method includes: the dust-containing gas is subjected to dust removal treatment through an ionization dust removal electric field generated by an electric field anode and an electric field cathode.
In this embodiment, the electric field dust removal processing method further includes: the ratio of the dust area of the electric field anode to the discharge area of the electric field cathode, the polar distance between the electric field anode and the electric field cathode, the length of the electric field anode and the length of the electric field cathode enable the coupling frequency of an ionization electric field to be less than or equal to 3.
In this embodiment, the electric field dust removal processing method further includes a method of providing an auxiliary electric field, including:
generating an auxiliary electric field in a flow channel, wherein the auxiliary electric field is not vertical to the flow channel; an included angle alpha is formed between the outlet end of the electric field anode and the near outlet end of the electric field cathode, and alpha is equal to 90 degrees.
1 Main test device and Material
1) VOCs stock solution (Industrial banana water)
15% of n-butyl acetate, 15% of ethyl acetate, 10-15% of n-butanol, 10% of ethanol, 5-10% of acetone, 20% of benzene and 20% of xylene;
2) ultraviolet photolysis device: UV ultraviolet lamp: u-shaped tube, 150W, 185nm +254nm mixed wavelength;
3) electric field device: the electric field device of example 1 was used;
4) VOCs concentration detection instrument and CO2A concentration detection instrument, a PM2.5 detection instrument and a temperature and humidity detection instrument;
5) air blower 2: rated air volume is 50L/min and 20L/min;
6) and 3 rotameters.
7) The PN value detection method comprises the following steps: PN value: the particle number of the solid particles is detected by using a laser dust particle counter on the light scattering principle, the gas production flow is 2.8L/min, and 5s is a sampling period.
2 main test procedures and parameters.
Referring to fig. 9, the VOCs gas treatment apparatus provided in this embodiment includes an ultraviolet device 4 and an electric field device 5 connected in sequence, where the ultraviolet device 4 includes: an air inlet 41, an air outlet 42 and an ultraviolet lamp 43.
The present embodiment adopts the electric field device 5 provided in embodiment 1, and the air outlet 42 of the ultraviolet device 4 is communicated with the electric field device inlet 51 of the electric field device 5.
Referring to fig. 9, a clean space enters an air humidification tank 1, the humidity of clean air is adjusted in the air humidification tank 1, VOCs stock solution is stored in a VOCs storage tank 2, the clean air from the air humidification tank 1 and the VOCs stock solution from the VOCs storage tank 2 are uniformly mixed in a mixing buffer tank 3, the gas flow of the clean air and the VOCs stock solution is controlled, and the gas flow and the concentration of the uniformly mixed gas containing VOCs (VOCs gas for short) are respectively controlled to be 0.95m3/h、320mg/m 3。
And (3) conveying the VOCs gas into the ultraviolet device 4 through an air inlet 41 of the ultraviolet device 4 to carry out UV purification treatment to obtain a product after VOCs is treated by UV, conveying the purified product into the electric field device 5 through an air outlet 42 to carry out electric field dust removal treatment to remove particles in the purified product, and finally discharging the purified product from an electric field device outlet 52 of the electric field device 5.
The concentration content and CO of VOCs in the VOCs gas are respectively detected at the inlet 41 of the ultraviolet device and the outlet 52 of the electric field device 52Concentration content, PM2.5 value; the PN values of the solid particles with different sizes in the gas are detected at the inlet 41 of the ultraviolet device, the outlet 42 of the ultraviolet device and the outlet 52 of the electric field device 5 respectively, and the PN values of the solid particles with the particle diameters of 23nm, 0.3 μm, 0.5 μm, 1.0 μm, 3.0 μm, 5.0 μm and 10 μm are detected specifically. See table 1 for the main test parameters.
TABLE 1
3 conditions and results of the experiment
Referring to FIG. 9, the initial flow rate is set to 0.95m3H, initial concentration 320mg/m3The VOCs are sequentially introduced into an ultraviolet device 4 and an electric field device 5.
After the power supply of the ultraviolet lamp in the ultraviolet device is switched on (the electric field device is not switched on temporarily), the treatment is carried out for 0 to 717 s;
starting a direct-current power supply of an electric field device when 717s is carried out, and carrying out an experiment for removing organic solid particles in the product after UV purification under the conditions of 5.13kV and 0.15mA electric fields;
adjusting the parameters of a direct-current power supply of the electric field device to 7.07kV and 0.79mA for 1017s, and performing an experiment for removing organic solid particles in the product after UV purification;
and adjusting the parameters of a direct current power supply of the electric field device to 9.10kV and 2.98mA at 1317s, and performing an experiment for removing the organic solid particles in the product after UV purification.
3.1 VOCs concentration variation
After the power supply of the ultraviolet lamp in the ultraviolet device is turned on (the electric field device is not turned on temporarily), the curves of the concentration of the VOCs at the outlet of the electric field device and the removal rate of the VOCs along with the time are shown in FIG. 10, wherein A is the concentration of the VOCs at the outlet of the electric field device (i.e. the concentration of the VOCs at the outlet of the ultraviolet device), and B is the removal rate of the VOCs. As can be seen from FIG. 10, the concentration of VOCs in 80s of UV lamp treatment was maintained at 320mg/m3The concentration value of (A) is not changed, and the concentration of VOCs is rapidly reduced after 80 s; after treatment for about 440s, the concentration value of VOCs is reduced to 201mg/m3The removal efficiency is as high as about 37.1%.
3.2 UV purification of CO from VOCs products2Change in concentration
FIG. 11 shows the CO at the outlet of the electric field apparatus2Curve of concentration as a function of treatment time, CO2The initial concentration was 903.3mg/m3As can be seen from FIG. 11, the UV lamp is turned on and then CO is turned off2The concentration increased rapidly, and when the treatment time reached 453s, CO was added2The concentration reaches 1126mg/m3Then CO is present2The concentration is 1135mg/m3The range is kept relatively stable. It can be seen that the opening of the dust removing electric field is to CO2The influence of the amount of production of (2) is not great.
3.3 PM2.5 data analysis
FIG. 12 is a graph of PM2.5 at the device outlet of the electric field device as a function of treatment time, with the initial PM2.5 value in the VOCs gas when the UV lamp and the electric field device are not onIs 25 mu g/m3(ii) a As can be seen from FIG. 12, when the UV device was turned on alone, PM2.5 increased rapidly, and the final PM2.5 value was maintained at 5966 μ g/m3About, i.e., PM2.5 increased by about 240 times.
Starting a direct-current power supply of the electric field device in 717s, performing an experiment for removing organic solid particles under the conditions of 5.13kV and 0.15mA electric fields, and starting the electric field device for 60s to reduce the PM2.5 value to 10 mu g/m3The PM2.5 removal efficiency is 99.8%.
Adjusting the parameters of a direct-current power supply of the electric field device to 7.07kV and 0.79mA at 1017s, and performing an experiment for removing organic solid particles in the product after UV purification; 1317s, adjusting the parameters of the direct-current power supply of the electric field device to 9.10kV and 2.98mA, and performing an experiment for removing organic solid particles in the product after UV purification; under the two electric field working conditions, the PM2.5 value at the outlet of the electric field device is 0 mu g/m3And the PM2.5 removal efficiency reaches 100 percent.
3.4 PN data analysis
When the ultraviolet device and the electric field device are not started, the PN value contents of the solid particles with different sizes in the VOCs original gas are detected, and the particle number (PN value) distribution of the solid particles with different sizes in the VOCs original gas is shown in Table 2.
After the ultraviolet device is independently started (the electric field device is not started), and the maximum purification efficiency of the VOCs is achieved, solid particle PN with various sizes in gas at the outlet of the dust removal area, namely the outlet of the electric field device, is greatly increased, and the experimental data are shown in Table 3. As is clear from Table 3, PN values of the solid particles at 23nm, 0.3 μm, 0.5 μm, 1.0 μm, 3.0 μm, 5.0 μm and 10 μm were increased to 2585933682 particles/m3122762968 pieces/m3122596749 pieces/m3120574982 pieces/m3117328622 pieces/m3112109682 pieces/m3105862049 pieces/m3。
717s, the direct-current power supply of the electric field device is turned on, and the experiment for removing the organic solid particles is carried out under the conditions of 5.13kV and 0.15mA electric fields, and the experimental data are shown in Table 4. After the electric field is turned on for 60s under the condition, PN of the gas at the outlet of the dust removal zone is reduced significantly, as can be seen from table 4, the removal efficiencies of solid particles with four sizes of 1.0 μm, 3.0 μm, 5.0 μm and 10 μm are all up to 100%, and the removal efficiencies of solid particles with 23nm, 0.3 μm and 0.5 μm are 93.5%, 95.1% and 98.5%, respectively.
Adjusting the parameters of the direct-current power supply of the electric field device to 7.07kV and 0.79mA for 1017s, and carrying out an experiment for removing organic solid particles, wherein the experimental data are shown in Table 5; when the electric field was turned on for 60 seconds under these conditions, it was found from Table 5 that the solid particles at 23nm and 0.3 μm were respectively reduced to 1584849/m3And 103180/m3The removal efficiency reaches 99.9 percent, and in addition, 5 solid particles of 0.5 mu m, 1.0 mu m, 3.0 mu m, 5.0 mu m and 10 mu m reach 100 percent under the condition of the electric field.
1317s the parameters of the DC power supply of the electric field device are adjusted to 9.10kV and 2.98mA, the experiment for removing organic solid particles is carried out, and the experimental data are shown in Table 6. Under the condition of the electric field, the solid particles with the particle sizes of 23nm, 0.3 mu m and 0.5 mu m further drop to 229283 particles/m323322/m3And 9894/m3And the removal efficiency reaches more than 99.99 percent.
TABLE 2 PN data in raw VOC gas
TABLE 3 PN data for UV at maximum VOC purification efficiency
TABLE 45.13 purified PN data under kV and 0.15mA electric field conditions
TABLE 57.07 kV and 0.79mA electric field conditions after decontamination PN data
TABLE 69.10 purified PN data under kV and 2.98mA electric field conditions
Example 21 UV photolysis + ionization dust removal
1. Electric field device: the electric field device of example 12 was used, and the other examples were the same as example 20.
2. Experimental conditions and experimental results
The initial flow rate is 0.95m3H, initial concentration 320mg/m3The VOCs are sequentially led into an ultraviolet device and an electric field device.
2.1 VOCs concentration variation
The concentration of VOCs varied in the same manner as in example 20.
2.2 UV purification of VOCs product CO2Change in concentration
UV purification of VOCs product CO2The concentration trend was the same as in example 20.
2.3 PM2.5 data analysis
When the UV device was turned on alone, the PM2.5 values in the gas varied with the treatment time in the same manner as in example 20.
Starting a direct-current power supply of the electric field device in 717s, performing an experiment for removing organic solid particles under the conditions of 5.13kV and 0.15mA electric fields, and starting the electric field device for 60s to reduce the PM2.5 value to 0.02 mu g/m3The PM2.5 removal efficiency is 99%.
Adjusting the parameters of a direct-current power supply of the electric field device to 7.07kV and 0.79mA at 1017s, and carrying out an experiment for removing organic solid particles in the product after UV purification; 1317s, adjusting the parameters of the direct-current power supply of the electric field device to 9.10kV and 2.98mA, and performing an experiment for removing organic solid particles in the product after UV purification; under the two electric field working conditions, the PM2.5 value at the outlet of the dust removal area is 0 mu g/m3And the PM2.5 removal efficiency reaches 100 percent.
2.4 PN data analysis
When the ultraviolet device and the electric field device are not turned on, the PN values of the solid particles with different sizes in the raw gas of VOCs are detected as shown in table 2.
After the ultraviolet device is independently turned on (the ionization dust removal device is not turned on), and the maximum purification efficiency of the VOCs is achieved, solid particle PN with various sizes in the gas at the outlet of the dust removal area is greatly increased, and the experimental data are shown in Table 3 and are the same as that in example 20.
717s, the direct-current power supply of the electric field device is turned on, the experiment for removing the organic solid particles is carried out under the conditions of 5.13kV and 0.15mA electric fields, the experimental data refer to table 7, and the data in table 7 are average values of 6 sampling times. After the electric field is turned on for 60s under the condition, PN of the gas at the outlet of the dust removal area is obviously reduced, and the removal efficiency of solid particles with the sizes of 23nm, 0.3 μm, 0.5 μm, 1.0 μm, 3.0 μm, 5.0 μm and 10 μm reaches 95% as can be seen from Table 7.
Adjusting the direct-current power supply parameters of the electric field device to 7.07kV and 0.79mA at 1017s, and carrying out an experiment for removing the organic solid particles, wherein the experimental data refer to table 8, and the data in table 8 are average values of 6 times of sampling; after the electric field is turned on for 60s under the condition, as can be seen from table 8, the removal efficiency of solid particles with the size of 23nm, 0.3 μm, 0.5 μm, 1.0 μm, 3.0 μm, 5.0 μm and 10 μm reaches 99%.
1317s, adjusting the parameters of the direct-current power supply of the electric field device to 9.10kV and 2.98mA, and performing an experiment for removing the organic solid particles, wherein the experimental data are shown in table 9, and the data in table 9 are average values of 6 sampling times. Under the condition of the electric field, the solid particles of 23nm, 0.3 mu m and 0.5 mu m further descend to564、82/m 3And 7/m3And the removal efficiency reaches 99.99 percent.
TABLE PN data after decontamination under 75.13 kV and 0.15mA electric field conditions
TABLE 87.07 kV and 0.79mA electric field conditions after decontamination PN data
TABLE PN data after purification under 99.10 kV and 2.98mA electric field conditions
Example 22 UV photolysis + ionization dust removal
1. Electric field device: the electric field device of example 13 was used, and the other examples were the same as example 20.
2. Experimental conditions and experimental results
The initial flow rate is 0.95m3H, initial concentration 320mg/m3The VOCs are sequentially led into an ultraviolet device and an electric field device.
2.1 VOCs concentration variation
The concentration of VOCs varied in the same manner as in example 20.
2.2 UV purification of VOCs product CO2Change in concentration
UV purification of VOCs product CO2The concentration trend was the same as in example 20.
2.3 PM2.5 data analysis
When the UV device was turned on alone, the PM2.5 values in the gas varied with the treatment time in the same manner as in example 20.
Starting a direct-current power supply of the electric field device in 717s, performing an experiment for removing organic solid particles under the conditions of 5.13kV and 0.15mA electric fields, and starting the electric field device for 60s to reduce the PM2.5 value to 0.02 mu g/m3The PM2.5 removal efficiency is 99%.
Adjusting the parameters of a direct-current power supply of the electric field device to 7.07kV and 0.79mA at 1017s, and carrying out an experiment for removing organic solid particles in the product after UV purification; 1317s, adjusting the parameters of the direct-current power supply of the electric field device to 9.10kV and 2.98mA, and performing an experiment for removing organic solid particles in the product after UV purification; under the two electric field working conditions, the PM2.5 value at the outlet of the dust removal area is 0 mu g/m3And the PM2.5 removal efficiency reaches 99.99 percent.
2.4 PN data analysis
When the ultraviolet device and the electric field device are not started, the PN value contents of the solid particles with different sizes in the original gas of the VOCs are detected as shown in the table 2.
After the ultraviolet device is independently started (the ionization dust removal device is not started), and the maximum purification efficiency of VOCs is achieved, solid particulate matter PN with various sizes in gas at the outlet of the dust removal area is greatly increased, and experimental data are shown in Table 3.
717s, the direct-current power supply of the electric field device is turned on, the experiment for removing the organic solid particles is carried out under the conditions of 5.13kV and 0.15mA electric fields, the experimental data refer to table 10, and the data in table 10 are average values of 6 times of sampling. After the electric field is turned on for 60s under the condition, PN of the gas at the outlet of the dust removal area is obviously reduced, and the removal efficiency of solid particles with the sizes of 23nm, 0.3 μm, 0.5 μm, 1.0 μm, 3.0 μm, 5.0 μm and 10 μm reaches 97% as can be seen from Table 10.
Adjusting the direct current power supply parameters of the electric field device to 7.07kV and 0.79mA at 1017s, and carrying out an experiment for removing organic solid particles, wherein the experimental data are shown in table 11, and the data in table 11 are average values of 6 times of sampling; after the electric field is turned on for 60s under the above conditions, it can be seen from Table 11 that the removal efficiency of solid particles with the size of 23nm, 0.3 μm, 0.5 μm, 1.0 μm, 3.0 μm, 5.0 μm and 10 μm reaches 99%.
1317s, adjusting the parameters of the direct current power supply of the electric field device to 9.10kV and 2.98mA, and performing an experiment for removing the organic solid particles, wherein the experimental data are shown in table 12, and the data in table 12 are average values of 6 sampling times. Under the condition of the electric field, the solid particles with the particle sizes of 23nm, 0.3 mu m and 0.5 mu m are further reduced to 345 particles/m38 pieces/m3And 0 pieces/m3The removal efficiency reaches 99.99 percent.
TABLE 105.13 purified PN data under kV and 0.15mA electric field conditions
TABLE 117.07 kV and 0.79mA electric field conditions after decontamination PN data
TABLE 129.10 purified PN data under kV and 2.98mA electric field conditions
Example 23 UV photolysis + ionization dust removal
1. Electric field device: the electric field device of example 14 was used, and the other examples were the same as example 20.
2. Experimental conditions and experimental results
The initial flow rate is 0.95m3H, initial concentration 320mg/m3The VOCs are sequentially led into an ultraviolet device and an electric field device.
2.1 VOCs concentration variation
The concentration of VOCs varied in the same manner as in example 20.
2.2UV purification of VOCs product CO2Change in concentration
UV purification of VOCs product CO2The concentration trend was the same as in example 20.
2.3 PM2.5 data analysis
When the UV device was turned on alone, the PM2.5 values in the gas varied with the treatment time in the same manner as in example 20.
Starting a direct-current power supply of the electric field device in 717s, performing an experiment for removing organic solid particles under the conditions of 5.13kV and 0.15mA electric fields, and starting the electric field device for 60s to reduce the PM2.5 value to 0.02 mu g/m3The PM2.5 removal efficiency is 99%.
Adjusting the parameters of a direct-current power supply of the electric field device to 7.07kV and 0.79mA at 1017s, and carrying out an experiment for removing organic solid particles in the product after UV purification; 1317s, adjusting the parameters of the direct-current power supply of the electric field device to 9.10kV and 2.98mA, and performing an experiment for removing organic solid particles in the product after UV purification; under the two electric field working conditions, the PM2.5 value at the outlet of the dust removal area is 0 mu g/m3And the PM2.5 removal efficiency reaches 99.99 percent.
2.4 PN data analysis
When the ultraviolet device and the electric dust removal device are not started, the PN value contents of the solid particles with different sizes in the original gas of the VOCs are detected as shown in the table 2.
After the ultraviolet device is independently started (the ionization dust removal device is not started), and the maximum purification efficiency of VOCs is achieved, solid particulate matter PN with various sizes in gas at the outlet of the dust removal area is greatly increased, and experimental data are shown in Table 3.
717s, the direct-current power supply of the electric field device is turned on, the experiment for removing the organic solid particles is carried out under the conditions of 5.13kV and 0.15mA electric fields, the experimental data refer to table 13, and the data in table 13 are average values of 6 times of sampling. After the electric field is turned on for 60s under the condition, PN of the gas at the outlet of the dust removal area is obviously reduced, and the removal efficiency of solid particles with the sizes of 23nm, 0.3 μm, 0.5 μm, 1.0 μm, 3.0 μm, 5.0 μm and 10 μm reaches 99% as can be seen from Table 13.
Adjusting the parameters of the direct-current power supply of the electric field device to 7.07kV and 0.79mA at 1017s, and carrying out an experiment for removing the organic solid particles, wherein the experimental data refer to table 14, and the data in table 14 are average values of 6 times of sampling; after the electric field is turned on for 60s under the conditions, as can be seen from table 14, the removal efficiency of solid particles with the size of 23nm, 0.3 μm, 0.5 μm, 1.0 μm, 3.0 μm, 5.0 μm and 10 μm reaches 99.9%.
1317s the parameters of the dc power supply of the electric field device were adjusted to 9.10kV and 2.98mA for the experiment of removing organic solid particles, the experimental data are shown in table 15, and the data in table 15 are the average values of 6 samplings. Under the condition of the electric field, the solid particles of 23nm, 0.3 mu m and 0.5 mu m further drop to 435 particles/m 30, m3And 0 pieces/m3The removal efficiency is 99.99%.
TABLE 135.13 purified PN data under kV and 0.15mA electric field conditions
TABLE 147.07 kV and 0.79mA electric field conditions after decontamination PN data
TABLE 159.10 purified PN data under kV and 2.98mA electric field conditions
Example 24 UV photolysis + ionization dust removal
1. Electric field device: the electric field device of example 15 was used, and the other examples were the same as example 20.
2. Experimental conditions and experimental results
The initial flow rate is 0.95m3H, initial concentration 320mg/m3VOCs (volatile organic compounds) are sequentially led into an ultraviolet deviceAnd an electric field device.
2.1 VOCs concentration variation
The concentration of VOCs varied in the same manner as in example 20.
2.2 UV purification of VOCs product CO2Change in concentration
UV purification of VOCs product CO2The concentration trend was the same as in example 20.
2.3 PM2.5 data analysis
When the UV device was turned on alone, the PM2.5 values in the gas varied with the treatment time in the same manner as in example 20.
And starting a direct-current power supply of the electric field device in 717s, carrying out an experiment for removing the organic solid particles under the conditions of 5.13kV and 0.15mA electric fields, and starting the electric field device for 60s, wherein the removal efficiency of PM2.5 is 99.9%.
Adjusting the parameters of a direct-current power supply of the electric field device to 7.07kV and 0.79mA at 1017s, and carrying out an experiment for removing organic solid particles in the product after UV purification; 1317s, adjusting the parameters of the direct-current power supply of the electric field device to 9.10kV and 2.98mA, and performing an experiment for removing organic solid particles in the product after UV purification; under the two electric field working conditions, the PM2.5 value at the outlet of the dust removal area is 0 mu g/m3And the PM2.5 removal efficiency reaches 99.99 percent.
2.4 PN data analysis
When the ultraviolet device and the electric dust removal device are not started, the PN value contents of the solid particles with different sizes in the original gas of the VOCs are detected as shown in the table 2.
After the ultraviolet device is independently started (the ionization dust removal device is not started), and the maximum purification efficiency of VOCs is achieved, solid particulate matter PN with various sizes in gas at the outlet of the dust removal area is greatly increased, and experimental data are shown in Table 3.
717s, the direct-current power supply of the electric field device is turned on, the experiment for removing the organic solid particles is carried out under the conditions of 5.13kV and 0.15mA electric fields, the experimental data refer to table 16, and the data in table 16 are average values of 6 times of sampling. After the electric field is turned on for 60s under the condition, PN of the gas at the outlet of the dust removal area is obviously reduced, and the removal efficiency of solid particles with the sizes of 23nm, 0.3 μm, 0.5 μm, 1.0 μm, 3.0 μm, 5.0 μm and 10 μm reaches 99% as can be seen from Table 16.
Adjusting the direct-current power supply parameters of the electric field device to 7.07kV and 0.79mA at 1017s, and carrying out an experiment for removing the organic solid particles, wherein the experimental data refer to table 17, and the data in table 17 are average values of 6 times of sampling; after the electric field is turned on for 60s under the conditions, as can be seen from Table 17, the removal efficiency of solid particles with the size of 23nm, 0.3 μm, 0.5 μm, 1.0 μm, 3.0 μm, 5.0 μm and 10 μm reaches 99%.
1317s the parameters of the dc power supply of the electric field device were adjusted to 9.10kV and 2.98mA for the experiment of removing organic solid particles, the experimental data are shown in table 18, and the data in table 18 are the average values of 6 samplings. Under the condition of the electric field, the solid particles of 23nm, 0.3 mu m and 0.5 mu m further drop to 323 particles/m 30, m3And 0 pieces/m3And the removal efficiency reaches 99.99 percent.
TABLE 165.13 purified PN data under kV and 0.15mA electric field conditions
TABLE 177.07 kV and 0.79mA electric field conditions after decontamination PN data
TABLE 189.10 purified PN data under kV and 2.98mA electric field conditions
Example 25 UV photolysis + ionization dust removal
1. Electric field device: the electric field device of example 16 was used, and the other examples were the same as example 20.
2. Experimental conditions and experimental results
The initial flow rate is 0.95m3H, initial concentration 320mg/m3The VOCs are sequentially introduced into an ultraviolet device 4 and an electric field device 5.
2.1 VOCs concentration variation
The concentration of VOCs varied in the same manner as in example 20.
2.2 UV purification of VOCs product CO2Change in concentration
UV purification of VOCs product CO2The concentration trend was the same as in example 20.
2.3 PM2.5 data analysis
When the UV device was turned on alone, the PM2.5 values in the gas varied with the treatment time in the same manner as in example 20.
Starting a direct-current power supply of the electric field device in 717s, performing an experiment for removing organic solid particles under the conditions of 5.13kV and 0.15mA electric fields, and starting the electric field device for 60s to reduce the PM2.5 value to 0.21 mu g/m3The PM2.5 removal efficiency is 99%.
Adjusting the parameters of a direct-current power supply of the electric field device to 7.07kV and 0.79mA at 1017s, and carrying out an experiment for removing organic solid particles in the product after UV purification; 1317s, adjusting the parameters of the direct-current power supply of the electric field device to 9.10kV and 2.98mA, and performing an experiment for removing organic solid particles in the product after UV purification; under the two electric field working conditions, the PM2.5 value at the outlet of the dust removal area is 0.017 mu g/m3And the PM2.5 removal efficiency reaches 99.9 percent.
2.4 PN data analysis
When the ultraviolet device and the ionization dust removal device are not started, the PN value contents of solid particles with different sizes in the original gas of the VOCs are detected as shown in Table 2.
After the ultraviolet device is independently started (the ionization dust removal device is not started), and the maximum purification efficiency of VOCs is achieved, solid particulate matter PN with various sizes in gas at the outlet of the dust removal area is greatly increased, and experimental data are shown in Table 3.
717s, the direct-current power supply of the electric field device is turned on, the experiment for removing the organic solid particles is carried out under the conditions of 5.13kV and 0.15mA electric fields, the experimental data refer to table 19, and the data in table 19 are average values of 6 times of sampling. After the electric field is turned on for 60s under the condition, PN of the gas at the outlet of the dust removal area is obviously reduced, and the removal efficiency of solid particles with the sizes of 23nm, 0.3 μm, 0.5 μm, 1.0 μm, 3.0 μm, 5.0 μm and 10 μm reaches 99% as can be seen from Table 19.
Adjusting the direct-current power supply parameters of the electric field device to 7.07kV and 0.79mA at 1017s, and carrying out an experiment for removing the organic solid particles, wherein the experimental data refer to table 20, and the data in table 20 are average values of 6 times of sampling; after the electric field is turned on for 60s under the condition, as can be seen from table 20, the removal efficiency of solid particles with the size of 23nm, 0.3 μm, 0.5 μm, 1.0 μm, 3.0 μm, 5.0 μm and 10 μm reaches 99.9%.
1317s the parameters of the dc power supply of the electric field device were adjusted to 9.10kV and 2.98mA for the experiment of removing organic solid particles, the experimental data are shown in table 21, and the data in table 21 are the average values of 6 samplings. Under the condition of the electric field, the solid particles with the particle sizes of 23nm, 0.3 mu m and 0.5 mu m further drop to 5333 particles/m 30, m3And 5/m3The removal efficiency reaches 99.99 percent.
TABLE 195.13 purified PN data under kV and 0.15mA electric field conditions
TABLE 207.07 kV and 0.79mA electric field conditions after decontamination PN data
TABLE 219.10 purified PN data under kV and 2.98mA electric field conditions
Example 26 UV + molecular Sieve + activated carbon Combined purification (hereinafter referred to as "Combined purification")
The embodiment provides a method for processing VOCs gas, which comprises the following steps:
carrying out UV purification treatment on the gas containing VOCs to obtain a product after VOCs is treated by UV;
and adsorbing and purifying the product of the UV treated VOCs, and then carrying out electric field dust removal treatment.
The main experimental device flow diagram of this example is shown in fig. 13.
1. Main test device and consumable
VOCs stock solution (Industrial banana water)
15% of n-butyl acetate, 15% of ethyl acetate, 10-15% of n-butanol, 10% of ethanol, 5-10% of acetone, 20% of benzene and 20% of xylene;
UV ultraviolet lamp
U-shaped tube, 150W, 185nm +254nm mixed wavelength
c. Adsorbent and process for producing the same
21AE hydrophobic molecular sieve;
industrial honeycomb activated carbon;
VOCs instrument, CO2Instrument, O3Instrument, PM2.5 instrument, humiture instrument
2. The sorbent base product parameters are seen in table 22.
TABLE 22
3. Combined purification VOCs test data
Referring to fig. 13, the VOCs gas treatment apparatus provided in this embodiment includes an ultraviolet device 4 and an adsorption device 6 connected in sequence, where the ultraviolet device 4 includes: an air inlet 41, an air outlet 42 and an ultraviolet lamp 43. The adsorption device 6 comprises a gas inlet 61 and a gas outlet 62, and the gas inlet 61 of the adsorption device 6 is communicated with the gas outlet 42 of the ultraviolet device 4.
Clean space gets into air humidifying jar 1 in this embodiment, adjust clean air's humidity in air humidifying jar 1, the VOCs stoste is stored in VOCs storage tank 2, with the clean air from air humidifying jar 1 and come from the VOCs stoste mixing in the VOCs storage tank in 3, the gas flow of control clean air and VOCs stoste, the VOCs gas after will mixing the homogeneous lets in ultraviolet device 4 in proper order, adsorption equipment 6, at first purify partly VOCs molecule through UV photodissociation photo-oxidation, remaining VOCs molecule utilizes the physical adsorption purification that contains porous structure's molecular sieve + active carbon to detach, the gaseous emission of adsorption equipment export that finally purifies passes through, can reentrant electric field device removes dust, reach the gaseous purpose that purifies of VOCs.
3.1 concentration of 614mg/m of combined purification low VOCs3Analysis of experimental data
3.1.1 fixed parameters
The ultraviolet device 4 was equipped with a 150W U-shaped ultraviolet lamp 43, and the adsorption device 6 was filled with 25.1g of molecular sieves 63 and 30.8g of active metal 64, respectively. The humidity of the VOCs gas entering the inlet 41 of the ultraviolet device 4 was controlled to 90% RH or higher by bubbling clean air. Regulating the gas flow of clean air and the stock solution of VOCs, and controlling the gas flow and concentration of VOCs to be 0.9m3H and 614mg/m3See 23 for other experimental parameters.
TABLE 23
| Temperature of air | 18℃ | Humidity of air | 70％RH | Atmospheric pressure | Atmospheric pressure |
| UV lamp wavelength | 185+254nm | UV lamp tube power | 150W | Residence time in the purification zone | 18.2s |
| VOCs stock gas flow | <0.04m 3/h | Air gas flow rate Q2 | 1.1m 3/h | Buffer tank outlet VOCs flow Q3 | 0.9m 3/h |
| 21AE molecular sieve loading | 25.1g | 21AE molecular sieve weight gain | 2.9g | Initial PM2.5 at inlet of photolysis zone | 79μg/m 3 |
| Loading of activated carbon | 30.8g | Weight gain of activated carbon | 0.5g | Final PM2.5 at the outlet of adsorption zone | 6096μg/m 3 |
| Buffer tank gas humidity | >90％RH |
3.1.2 purification Process VOCs variation data at the outlet of each purification Unit
Concentration of 3.1.2.1 VOCs
Fig. 14 is a graph showing the time-dependent changes of the concentrations of VOCs at the gas inlet 41, gas outlet 42 and gas outlet 62 of the ultraviolet device 4 and the adsorption device 6 when purifying low VOCs, where a is the concentration of VOCs at the outlet of the buffer tank, B is the concentration of VOCs at the gas outlet 42 of the ultraviolet device 4, and C is the concentration of VOCs at the gas outlet 62 of the adsorption device 6. As can be seen from FIG. 14, from the curve of the change in the concentration of VOCs at the outlet 62 of the adsorption apparatus 6, the concentration of VOCs at the outlet of the adsorption zone stabilized at 6-9mg/m within 0s-600s immediately after the start of the combined purge test3The combined purification efficiency during this period reaches 98.5%.
At around 800s (13min), the concentration of VOCs at the outlet 62 of the adsorption unit 6 was 30mg/m3(when the concentration value of VOCs is set to be 5% of the original concentration, the adsorbent penetrates), the adsorbent penetrates, and before penetration, the combined purification efficiency is at least more than 95%;
when the combined purification time exceeds the penetration time, the combined purification efficiency gradually decreases, and the concentration of the gas outlet 62 of the adsorption device 6 rises to 197mg/m at 7200s (2 hours)3At this time, the gas outlet of the ultraviolet deviceThe concentration is 219mg/m3That is, the concentrations before and after adsorption and purification are substantially equal, the molecular sieve + activated carbon combined adsorbent is saturated and ineffective, and cannot adsorb and purify the VOCs, and the saturated adsorbent needs to be replaced and the VOCs needs to be desorbed and regenerated in advance.
In the whole combined purification process, from the beginning of purification to the saturation of the adsorbent in the adsorption device, the total time is about 7200s, and the statistics of the test data can obtain that the purification efficiency of the VOCs of the UV purification device is basically kept about 40.9%.
3.1.2.2 purifying process and each purifying unit outlet CO2Change data
FIG. 15 shows the CO at the inlet, outlet and outlet of the ultraviolet device during purification of low VOCs concentration2Concentration profile over time, where A is shown as CO at the outlet of the buffer tank2Concentration, B, is shown as CO at the outlet of the UV device2Concentration, C, as CO at the outlet of the gas outlet of the adsorption unit2And (4) concentration. As can be seen from FIG. 15, CO at the inlet of the ultraviolet device2The concentration is kept at 852mg/m as a whole3Average level of (a), CO at the outlet of the ultraviolet device after reaching the maximum VOCs purification efficiency of UV2The concentration is basically maintained at a relatively stable level, namely 1284mg/m3，CO 2The new generation rate after UV purification is stabilized at about 50.7%.
CO at the outlet of the adsorption device2The concentration reaches the maximum value of 1584mg/m after 360s3And then maintained at a relatively constant level of 1472mg/m3I.e. CO purified in combination2The new generation rate is stabilized at about 72.8%.
Comparing CO at outlets of UV purification device and adsorption device2The concentration and the rate of formation of the new gas of (A) are shown as the CO in the adsorption apparatus2The concentration and the new generation rate of (2) are still greatly increased due to VOCs and O at the outlet of the UV unit3H2O can be adsorbed on the outer surface and the inner surface of the pore canal of the molecular sieve and the activated carbon after entering the adsorption zone, and the catalysis of VOCs can be continuously carried outOxidative decomposition to CO2And further purifying VOCs in the waste gas.
3.1.2.3 comparison of PM2.5 data at the beginning of Combined decontamination and at the end of Combined decontamination
0.9m before the start of the formal combined cleanup experiment3H and 614mg/m3Has a PM2.5 value of 79 [ mu ] g/m in VOCs gas3And after the 7200s purification experiment, the PM2.5 value in the gas at the outlet of the adsorption device is increased to 6096 mu g/m3PM2.5 increased nearly 77-fold.
On the one hand, the VOCs are decomposed to generate CO in the processes of UV photolysis and photooxidation2And photopolymerization occurs, so that the VOCs molecules polymerize to generate organic particles with high molecular weight, and the organic particles are dispersed in the gas.
3.2 Combined purification with high VOCs concentration of 1105mg/m3Analysis of experimental data
3.2.1 Experimental fixed parameters
Regulating the gas flow of clean air and the stock solution of VOCs, and controlling the gas flow and concentration of VOCs to be 0.9m3H and 1105mg/m3See table 24 for specific parameters.
Watch 24
3.2.2 purification Process VOCs variation data at the outlet of each purification Unit
Concentration of 3.2.2.1 VOCs
FIG. 16 is a graph showing the VOCs concentration at the outlet of the ultraviolet light unit and the VOCs concentration at the inlet and outlet of the ultraviolet light unit over time during the purification of high VOCs concentration, wherein A is the VOCs concentration at the outlet of the buffer tank and B is the VOCs concentration at the outlet of the ultraviolet light unitConcentration, C, is shown as the concentration of VOCs at the gas outlet of the adsorption unit. As can be seen from FIG. 16, from the curve of the concentration C7 of VOCs at the outlet of the adsorption apparatus, the concentration of VOCs at the outlet of the adsorption zone stabilized at 8-19mg/m within 0s-600s immediately after the start of the combined purification test3The combined purification efficiency during this period reaches 98.3%.
The concentration of VOCs at the outlet of the adsorption zone is 55mg/m at about 1020s3(when the concentration value of VOCs is set to be 5% of the original concentration, the adsorbent penetrates), the adsorbent penetrates, and before penetration, the combined purification efficiency is at least over 94.7%;
when the combined purification time exceeds the penetration time, the combined purification efficiency gradually decreases, and the outlet concentration at the air outlet of the adsorption device rises to 451mg/m at 7200s (2 hours)3At this time, the UV device outlet concentration C5 was 456mg/m3The molecular sieve and active carbon combined adsorbent is saturated and ineffective, and can not play a role in adsorbing and purifying VOCs any more, the combined purification efficiency is reduced to 41.1%, and only the ultraviolet device can play a purification role.
In the whole combined purification process, from the beginning of purification to the saturation of the adsorbent in the adsorption device, the total time is about 7200s, and the statistics of the test data can obtain that the purification efficiency of the VOCs of the UV purification device is basically kept at about 41.1%.
3.2.2.2 purification Process Each purification Unit Outlet CO2Change data
FIG. 17 shows the CO at the inlet, outlet and outlet of the ultraviolet device during purification of high VOCs concentration2Concentration profile over time, where A is shown as CO at the outlet of the buffer tank2Concentration, B, is shown as CO at the outlet of the UV device2Concentration, C, as CO at the outlet of the gas outlet of the adsorption unit2And (4) concentration. As can be seen from FIG. 17, CO at the inlet of the ultraviolet device2The concentration is kept at 882.5mg/m3Average level of (a), CO at the outlet of the ultraviolet device after reaching the maximum VOCs purification efficiency of UV2The concentration is basically maintained at a relatively stable level, namely 1531mg/m3UV purified CO2The yield stabilized at about 73.6%.
CO at gas outlet of adsorption device2The concentration reached a maximum of 1748mg/m after 360s3Then kept at a relatively stable level of 1679mg/m3I.e. CO purified in combination2The new generation rate is stabilized at about 90.3%.
Comparing the ultraviolet device with CO at the gas outlet of the adsorption device2The concentration and the rate of formation of the new gas of (A) are shown as the CO in the adsorption apparatus2The concentration and the new generation rate are still greatly increased due to VOCs and O from the outlet of the ultraviolet device3、H 2After entering the adsorption zone, O can be adsorbed on the outer surfaces and the inner surfaces of the pore passages of the molecular sieve and the activated carbon, and the catalytic oxidation decomposition of VOCs is continuously carried out to generate CO2And further purifying VOCs in the gas.
3.2.2.3 comparison of PM2.5 data at the beginning of Combined decontamination and at the end of Combined decontamination
0.9m before the start of the formal combined cleanup experiment3H and 1105mg/m3Has a PM2.5 value of 17 [ mu ] g/m in VOCs gas3And after the 7200s purification experiment is finished, the PM2.5 value in the gas at the outlet of the adsorption device is increased to 5580 mu g/m3PM2.5 increased nearly 300-fold.
In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (19)
- A VOCs gas treatment apparatus comprising:an inlet, an outlet, and a flow channel between the inlet and the outlet;the ultraviolet device and the electric field device are sequentially arranged along the flow channel from the inlet to the outlet;the electric field device comprises: the device comprises an electric field device inlet, an electric field device outlet, an electric field cathode and an electric field anode, wherein the electric field cathode and the electric field anode are used for generating an ionization dust removal electric field;the ratio of the dust deposition area of the electric field anode to the discharge area of the electric field cathode is 1.667: 1-1680: 1.
- a VOCs gas treatment device as claimed in claim 1, wherein the ratio of the dust area of the field anode to the discharge area of the field cathode is 6.67: 1-56.67: 1.
- a VOCs gas treatment device as claimed in claim 1 or 2, wherein the ratio of the dust area of the electric field anode to the discharge area of the electric field cathode is such that the number of coupling times of the ionizing dust removing electric field is less than or equal to 3.
- A VOCs gas treatment plant as claimed in any one of claims 1 to 3, wherein said e-field cathode has a diameter of 1 to 3mm and the polar separation between said e-field anode and said e-field cathode is 2.5 to 139.9 mm.
- A VOCs gas treatment device according to any one of claims 1-4, wherein the ratio of the dust deposition area of the electric field anode to the discharge area of the electric field cathode, the inter-polar distance between the electric field anode and the electric field cathode, the electric field anode length and the electric field cathode length are such that the number of couplings of the ionizing dust removal electric field is less than or equal to 3.
- A VOCs gas treatment method comprises the following steps:carrying out UV treatment on the VOCs gas to obtain a product after the VOCs is treated by UV;performing electric field dust removal treatment on the product subjected to the UV treatment on the VOCs, and removing particulate matters in the product subjected to the UV treatment on the VOCs;the electric field dust removal treatment also comprises a method for reducing the coupling of a dust removal electric field, and the method for reducing the coupling of the dust removal electric field comprises the following steps:the method comprises selecting the ratio of the dust collecting area of the electric field anode to the discharging area of the electric field cathode to make the coupling frequency of the ionization electric field less than or equal to 3.
- A method according to claim 6, comprising selecting a ratio of a dust area of the electric field anode to a discharge area of the electric field cathode to be 1.667: 1-1680: 1.
- a method according to claim 6 or 7, comprising selecting the ratio of the dust area of the electric field anode to the discharge area of the electric field cathode to be 6.67: 1-56.67: 1.
- a method according to any one of claims 6 to 8, comprising selecting said electric field cathode to have a diameter of 1 to 3mm and a pole separation distance between said electric field anode and said electric field cathode of 2.5 to 139.9 mm.
- A method for processing gases of VOCs as claimed in any one of claims 6 to 9, wherein the ratio of the dust area of said electric field anode to the discharge area of said electric field cathode, the inter-polar distance between said electric field anode and said electric field cathode, the length of said electric field anode and the length of said electric field cathode are selected such that the number of times of coupling of said ionizing dust removing electric field is less than or equal to 3.
- The method according to any one of claims 6 to 10, wherein the method further comprises subjecting the products of UV treatment of the VOCs to an adsorption treatment before the electric field dust removal treatment.
- A method for processing gases of VOCs as claimed in claim 11, wherein said adsorbent for adsorption treatment is activated carbon and/or molecular sieve.
- The method according to any one of claims 6 to 12, wherein the products after UV treatment of the VOCs contain nanoparticles, and the removal of the nanoparticles in the products after UV treatment of the VOCs comprises removal of the nanoparticles in the products after UV treatment of the VOCs.
- A method according to any one of claims 6 to 13, wherein the products of UV treatment of the VOCs contain particles smaller than 50nm, and wherein removing the particles from the products of UV treatment of the VOCs comprises removing the particles smaller than 50nm from the products of UV treatment of the VOCs.
- The method according to any one of claims 6 to 14, wherein the UV treated VOCs product contains 15 to 35 nm particles, and the removing of the particles from the UV treated VOCs product comprises removing 15 to 35 nm particles from the UV treated VOCs product.
- The method according to any one of claims 6 to 15, wherein the UV treated VOCs product contains 23nm particles, and wherein removing the particles from the UV treated VOCs product comprises removing 23nm particles from the UV treated VOCs product.
- The method for treating VOCs according to any one of claims 6 to 16, wherein the removal rate of 23nm particulate matter in the product after UV treatment of VOCs is 93% or more.
- The method for treating VOCs according to any one of claims 6 to 17, wherein the removal rate of 23nm particulate matter in the product after UV treatment of VOCs is not less than 95%.
- The method for treating VOCs according to any one of claims 6 to 18, wherein the removal rate of 23nm particulate matter in the product after UV treatment of VOCs is greater than or equal to 99.99%.
Applications Claiming Priority (21)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910340445 | 2019-04-25 | ||
| CN2019103404438 | 2019-04-25 | ||
| CN2019103404457 | 2019-04-25 | ||
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| PCT/CN2020/086863 WO2020216367A1 (en) | 2019-04-25 | 2020-04-24 | Apparatus and method for treating vocs gas |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240090A (en) * | 2015-10-28 | 2016-01-13 | 重庆工商大学 | Technique method used for removing automobile tail gas particles |
| CN107081036A (en) * | 2017-06-27 | 2017-08-22 | 山东大学深圳研究院 | A kind of UV activation ozone oxidation VOCs dedusting and purifying devices and method |
| CN107281908A (en) * | 2016-04-13 | 2017-10-24 | 江苏中科睿赛污染控制工程有限公司 | One kind VOCs containing oil smoke emission-control equipments and its processing method and purposes |
| CN109045921A (en) * | 2018-10-11 | 2018-12-21 | 郑金华 | New energy equipment for treating industrial waste gas and application method |
Family Cites Families (46)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3711312A1 (en) * | 1987-04-03 | 1988-10-13 | Daimler Benz Ag | DIESEL INTERNAL COMBUSTION ENGINE WITH AN EXHAUST SYSTEM |
| JPS6456121A (en) * | 1987-06-01 | 1989-03-03 | Ebara Corp | Process and apparatus for treating waste gas with irradiation of radiant ray |
| CA2263233C (en) * | 1996-10-09 | 2002-01-15 | Zero Emissions Technology Inc. | Barrier discharge conversion of so2 and nox to acids |
| JP2000005631A (en) * | 1998-06-19 | 2000-01-11 | Hitachi Ltd | Air cleaner |
| KR100469005B1 (en) * | 2001-10-23 | 2005-01-29 | 티오켐 주식회사 | Photocatalytic system for the removal of volatile organic compounds |
| US6902604B2 (en) * | 2003-05-15 | 2005-06-07 | Fleetguard, Inc. | Electrostatic precipitator with internal power supply |
| US7025806B2 (en) * | 2003-11-25 | 2006-04-11 | Stri{dot over (o)}nAir, Inc. | Electrically enhanced air filtration with improved efficacy |
| JP2006043550A (en) * | 2004-08-03 | 2006-02-16 | Mitsubishi Electric Corp | Air cleaner |
| WO2007116131A1 (en) * | 2006-04-11 | 2007-10-18 | Renault S.A.S | Device and method for capturing and eliminating agglomerated particles emanating from a motor vehicle particle filter |
| CN200981021Y (en) * | 2006-09-13 | 2007-11-28 | 大连海事大学 | Needle array electrode bipolar catching high-temperature carbon smoke device |
| JP4873564B2 (en) * | 2007-03-29 | 2012-02-08 | トヨタ自動車株式会社 | Exhaust gas purification device |
| JP2010133332A (en) * | 2008-12-04 | 2010-06-17 | Nissan Motor Co Ltd | Catalyst device |
| CN102536394A (en) * | 2012-03-05 | 2012-07-04 | 尹协谦 | Terminal purifier for tail gas exhausted by vehicles |
| JP5929734B2 (en) * | 2012-12-14 | 2016-06-08 | 株式会社デンソー | Exhaust gas treatment device for internal combustion engine |
| CN103566753B (en) * | 2013-11-18 | 2017-01-18 | 沈阳工业大学 | Cooking oil fume integrated treatment system and method |
| JP2015171440A (en) * | 2014-03-11 | 2015-10-01 | 株式会社Ｎｂｃメッシュテック | Method and apparatus for virus inactivation by irradiation of deep uv light |
| CN103977896B (en) * | 2014-05-21 | 2017-06-06 | 邹炎 | The production technology of Wet type electric dust-removing device and its dividing plate |
| CN104127907A (en) * | 2014-08-06 | 2014-11-05 | 上海侃亿诺纺织品有限公司 | Non-thermal plasma air-purifying and disinfecting reactor |
| JP6646952B2 (en) * | 2015-06-09 | 2020-02-14 | 臼井国際産業株式会社 | Discharge electrode of electric precipitator for exhaust gas treatment of diesel engine |
| CN105233646A (en) * | 2015-11-18 | 2016-01-13 | 温州伟诚环保科技有限公司 | Organic waste gas treatment device |
| CN205518221U (en) * | 2016-04-14 | 2016-08-31 | 北京中航天业科技有限公司 | Food and beverage oil smoke area self -cleaning function's near zero emission purifier |
| CN205518217U (en) * | 2016-04-17 | 2016-08-31 | 曹阳 | A electrode assembly for motor vehicle exhaust clarifier |
| CN105944555A (en) * | 2016-05-10 | 2016-09-21 | 湖州荣大环境科技有限公司 | Flue gas treatment device of printing and dyeing setting machine |
| CN205760628U (en) * | 2016-07-01 | 2016-12-07 | 浙江杰隆环境科技有限公司 | A kind of compound waste gas purification apparatus |
| CN106269256A (en) * | 2016-08-10 | 2017-01-04 | 福建龙净环保股份有限公司 | A kind of electrostatic precipitator for gas cleaning |
| CN205949064U (en) * | 2016-08-15 | 2017-02-15 | 中冶京诚工程技术有限公司 | Vertical wet -type electrostatic precipitator and hierarchical washing unit thereof |
| CN206253232U (en) * | 2016-09-07 | 2017-06-16 | 深圳市天浩洋环保股份有限公司 | A kind of high-pressure electrostatic precipitation purifies equipment integrating with UV photodissociation |
| CN106215658B (en) * | 2016-09-26 | 2019-05-03 | 深圳市东荣环保科技有限公司 | Exhaust gas Environmental-protecting treater |
| CN106582265A (en) * | 2016-11-16 | 2017-04-26 | 中山大学 | Photocatalytic oxidation air purification device and method |
| CN106762035A (en) * | 2017-03-19 | 2017-05-31 | 贾元友 | Fuel engines motor vehicle exhaust emission cleaning system |
| CN106733194B (en) * | 2017-03-31 | 2018-10-16 | 广东美的厨房电器制造有限公司 | Electrostatic equipment and kitchen ventilator |
| CN206771580U (en) * | 2017-04-01 | 2017-12-19 | 姚本海 | A kind of purification of air dedirt device |
| CN206823397U (en) * | 2017-04-08 | 2018-01-02 | 苏州鱼翔环境工程有限公司 | A kind of VOC off-gas cleaning equipments |
| CN207462987U (en) * | 2017-07-07 | 2018-06-08 | 中山市中开环保设备制造有限公司 | A kind of VOCs emission-control equipments |
| CN107115790A (en) * | 2017-07-07 | 2017-09-01 | 中山市中开环保设备制造有限公司 | A kind of VOCs emission-control equipments |
| CN207153476U (en) * | 2017-09-15 | 2018-03-30 | 桐乡市致远环保科技有限公司 | A kind of processing high temperature oil-containing, the cleaning equipment of dust-laden organic odoriferous waste gas |
| CN107469596A (en) * | 2017-09-19 | 2017-12-15 | 佛山市宝粤美科技有限公司 | A kind of new waste gas governing system |
| CN107583454A (en) * | 2017-09-27 | 2018-01-16 | 浙江工业大学 | A kind of impulse electric corona combination photocatalysis removes the device and processing method of organic exhaust gas |
| CN207371354U (en) * | 2017-10-31 | 2018-05-18 | 福建省爱善环保科技有限公司 | A kind of organic toxic harmful exhaust recycle device |
| CN107930851A (en) * | 2017-11-23 | 2018-04-20 | 北京东方计量测试研究所 | A kind of electrostatic precipitator |
| CN107983104A (en) * | 2017-12-28 | 2018-05-04 | 哈尔滨理工大学 | A kind of Paint Factory's electrostatic precipitation joint plasma removes VOCs apparatus and method |
| CN208097764U (en) * | 2018-03-19 | 2018-11-16 | 江苏万贤环境工程有限公司 | A kind of photodissociation oxidation low concentration VOCs processing equipment |
| CN108480048B (en) * | 2018-06-11 | 2023-10-24 | 山东山创环境科技有限公司 | Lampblack purifying device adopting wire discharge technology |
| CN208679458U (en) * | 2018-06-13 | 2019-04-02 | 湖北徐风环保科技有限公司 | A kind of combination wet electrical dust precipitator |
| CN113366198B (en) * | 2018-10-22 | 2023-08-15 | 上海必修福企业管理有限公司 | Engine emission treatment system and method |
| CN109127144A (en) * | 2018-10-23 | 2019-01-04 | 国电科学技术研究院有限公司 | High frequency couples fine particle with pulse point domain and system is removed in depth |
-
2020
- 2020-04-24 WO PCT/CN2020/086862 patent/WO2020216366A1/en active Application Filing
- 2020-04-24 CN CN202080030946.6A patent/CN113748259A/en active Pending
- 2020-04-24 WO PCT/CN2020/086865 patent/WO2020216369A1/en active Application Filing
- 2020-04-24 WO PCT/CN2020/086856 patent/WO2020216361A1/en active Application Filing
- 2020-04-24 WO PCT/CN2020/086866 patent/WO2020216370A1/en active Application Filing
- 2020-04-24 CN CN202080030938.1A patent/CN113710366A/en active Pending
- 2020-04-24 WO PCT/CN2020/086861 patent/WO2020216365A1/en active Application Filing
- 2020-04-24 CN CN202080030899.5A patent/CN113710350A/en active Pending
- 2020-04-24 CN CN202080030900.4A patent/CN113710881A/en active Pending
- 2020-04-24 WO PCT/CN2020/086860 patent/WO2020216364A1/en active Application Filing
- 2020-04-24 WO PCT/CN2020/086857 patent/WO2020216362A1/en active Application Filing
- 2020-04-24 CN CN202090000499.5U patent/CN218235209U/en active Active
- 2020-04-24 WO PCT/CN2020/086858 patent/WO2020216363A1/en active Application Filing
- 2020-04-24 CN CN202090000500.4U patent/CN216974977U/en active Active
- 2020-04-24 CN CN202080030940.9A patent/CN113747976A/en active Pending
- 2020-04-24 WO PCT/CN2020/086863 patent/WO2020216367A1/en active Application Filing
- 2020-04-24 CN CN202080030932.4A patent/CN113748258A/en active Pending
- 2020-04-24 WO PCT/CN2020/086864 patent/WO2020216368A1/en active Application Filing
- 2020-04-24 CN CN202080030898.0A patent/CN113727781A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240090A (en) * | 2015-10-28 | 2016-01-13 | 重庆工商大学 | Technique method used for removing automobile tail gas particles |
| CN107281908A (en) * | 2016-04-13 | 2017-10-24 | 江苏中科睿赛污染控制工程有限公司 | One kind VOCs containing oil smoke emission-control equipments and its processing method and purposes |
| CN107081036A (en) * | 2017-06-27 | 2017-08-22 | 山东大学深圳研究院 | A kind of UV activation ozone oxidation VOCs dedusting and purifying devices and method |
| CN109045921A (en) * | 2018-10-11 | 2018-12-21 | 郑金华 | New energy equipment for treating industrial waste gas and application method |
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| CN113748258A (en) | 2021-12-03 |
| WO2020216368A1 (en) | 2020-10-29 |
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| WO2020216362A1 (en) | 2020-10-29 |
| WO2020216370A1 (en) | 2020-10-29 |
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