CN218235209U - Electric field device and VOCs gas treatment device - Google Patents
Electric field device and VOCs gas treatment device Download PDFInfo
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- CN218235209U CN218235209U CN202090000499.5U CN202090000499U CN218235209U CN 218235209 U CN218235209 U CN 218235209U CN 202090000499 U CN202090000499 U CN 202090000499U CN 218235209 U CN218235209 U CN 218235209U
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- 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
- B03C3/011—Prefiltering; Flow controlling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- 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
- B03C3/02—Plant or installations having external electricity supply
- B03C3/04—Plant or installations having external electricity supply dry type
- B03C3/06—Plant or installations having external electricity supply dry type characterised by presence of stationary tube electrodes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/01—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust by means of electric or electrostatic separators
Abstract
According to the utility model discloses an electric field device and VOCs gas treatment device, the electric field device includes electric field device entry, electric field device export, electric field negative pole and electric field positive pole are used for producing 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; the VOCs gas treatment device utilizes the electric field to remove dust, effectively removes nanoparticles in products after UV irradiation treatment gas, and avoids secondary pollution.
Description
Technical Field
The utility model belongs to the technical field of exhaust-gas treatment, concretely relates to electric field device and VOCs gas treatment device.
Background
Volatile Organic Compounds (VOCs) are a very common pollutant species in indoor and outdoor environments, and mainly include hydrocarbons (alkanes, aromatics, olefins), and derivatives of hydrocarbons (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, and 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 removal efficiency of VOCs at the beginning of the reaction, but photocatalytic oxidation intermediate deposits are formed on the surface of the photocatalyst during the reaction, so that the catalytic activity of the photocatalyst is reduced.
The technology of degrading VOCs by ultraviolet light (UV) is a simple method for eliminating VOCs, and meanwhile, the UV light degradation technology does not use a catalyst, so that the UV light degradation technology has lower cost and operability and attracts the attention of the industry. There are two reaction pathways for UV light degradation of VOCs: one reaction pathway is photolysis, also known as photodissociation, where the typical technique is a UV lamp, consisting ofThe photon energy of short wavelength ultraviolet is higher than the bond energy of the chemical bonds in most pollutant molecules, and 185nm wavelength ultraviolet light emitted by a UV lamp has higher energy (6.7 eV), can be used for destroying and decomposing the chemical bond structures of various VOCs, and comprises organic molecular structures which are difficult to process, such as benzene, toluene, xylene and the like; another reaction pathway is photooxidation, ultraviolet light of 185nm wavelength, which generates high-energy photons that activate O 2 And H 2 O 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), O 3 And the VOCs molecules and the newly generated intermediate micromolecules thereof can be continuously subjected to oxidative decomposition, so that 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 CO 2 And H 2 And 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.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a VOCs gas treatment device to solve the problem of particles, more specifically nanoparticles, generated during the treatment of VOCs-containing gases using ultraviolet technology.
The utility model discloses the people finds the new problem that exists in the ultraviolet ray processing contains VOCs's gas technology through the research to find corresponding technological means and solve these problems. For example, the prior art has not recognized, but the present inventors have found that the product of UV irradiation treatment of a gas containing VOCs contains nanoparticles, particularly particles below 50nm, and especially particles around 23nm, and therefore requires a nanoparticle removal operation prior to discharge into the air. In addition, the utility model discloses the people of this application discover that their utility model's electric field dust pelletizing system can get rid of the nanoparticle in the gaseous after-product of UV processing VOCs effectively, and especially the granule below 50nm avoids secondary pollution, has consequently solved the technical problem that technical staff in the field did not realize to unexpected technological effect has been obtained.
To achieve the above and other related objects, the present invention provides the following technical solutions:
1. the utility model provides an example 1: 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. The utility model provides an example 2: including example 1 above, wherein the ultraviolet device comprises at least one ultraviolet lamp.
3. The utility model provides an example 3: 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 185nm.
5. The utility model provides an example 5: 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. The utility model provides an example 6: including any 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. The utility model provides an example 7: including example 6 above, wherein the field anode includes a first anode portion proximate the field device inlet and a second anode portion proximate the field device outlet, at least one cathode support plate disposed between the first anode portion and the second anode portion.
8. The utility model provides an example 8: 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. The utility model provides an example 9: 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 present invention: including the above examples 8 or 9, wherein the insulating mechanism includes an insulating portion and a heat insulating portion.
11. The utility model provides an example 11: the above example 10 is included, in which the insulating part is made of a ceramic material or a glass material.
12. Example 12 provided by the present invention: the above example 10 is included, 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. The utility model provides an example 13: 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 one 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. The utility model provides an example 15: including any of examples 7 through 14 above, wherein a 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.
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. The utility model provides an example 17: including any of examples 6-16 above, wherein the electric field cathode comprises at least one electrode rod.
18. The utility model provides an example 18: including example 17 above, wherein the electrode rod has a diameter of no greater than 3mm.
19. The utility model provides an example 19: 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. The utility model provides an example 20: including any of examples 6-19 above, wherein the electric field anode is comprised of a hollow tube bundle.
21. The utility model provides an example 21: 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. The utility model provides an example 23: 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. The utility model provides an example 25: 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 present 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. The utility model provides an example 27: 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 present invention: including example 27 above, wherein the first electrode is a cathode.
29. The utility model provides an example 29: 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. The utility model provides an example 30: examples 29 above are included, wherein 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. The utility model provides an example 31: 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 dedusting electric field.
32. Example 32 provided by the present invention: example 31 above is included, wherein the second electrode is an anode.
33. The utility model provides an example 33: 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. The utility model provides an example 34: example 33 above is included wherein 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. The utility model provides an example 35: 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 present invention: any one of the above examples 6 to 35, 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. the utility model provides an example 37: any one of the above examples 6 to 35 is included, wherein a ratio of a dust deposition area of the field anode to a discharge area of the field cathode is 6.67:1-56.67:1.
38. example 38 provided by the present 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 present invention: including any of examples 6-37 above, wherein a pole pitch of the electric field anode and the electric field cathode is less than 150mm.
40. The utility model provides an example 40: including any one of examples 6-37 above, wherein the inter-polar distance between the electric field anode and the electric field cathode is 2.5-139.9mm.
41. The utility model provides an example 41: any one of the above examples 6 to 37, wherein the inter-polar distance between the electric field anode and the electric field cathode is 5-100mm.
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. The utility model provides an example 43: including any of examples 6-41 above, wherein the electric field anode length is 60-180mm.
44. Example 44 provided by the present invention: including any of examples 6 through 43 above, wherein the electric field cathode has a length of 30-180mm.
45. The utility model provides an example 45: including any of examples 6-43 above, wherein the electric field cathode length is 54-176mm.
46. Example 46 provided by the present invention: including any of examples 36-45 above, wherein, when operating, the ionizing dust removal electric field has a number of couplings ≦ 3.
47. The utility model provides an example 47: any one of the above examples 6 to 46 is included, wherein the ratio of the dust deposition area of the electric field anode to the discharge area of the electric field cathode, the inter-pole distance between the electric field anode and the electric field cathode, the electric field anode length, and the electric field cathode length enable the coupling number of the ionizing dust removing electric field to be less than or equal to 3.
48. Example 47 provided by the present 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 50kv.
49. The utility model provides an example 49: including any of examples 1-47 above, wherein the electric field apparatus further comprises a number of connection housings through which the series electric field stages are connected.
50. The utility model provides an example 50: including example 49 above, wherein the distance of adjacent electric field levels is more than 1.4 times the pole pitch.
51. The utility model provides an example 51: including any of examples 1 through 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 present invention: example 51 above is included, wherein an adsorbent material is disposed within the adsorbent device.
53. The utility model provides an example 53: including example 52 above, wherein the adsorbent material comprises at least one of activated carbon, molecular sieve.
54. Example 54 provided by the present 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. The utility model provides an example 55: example 54 is included, wherein the method for processing VOCs gas further includes, before the electric field dust removal processing, performing an adsorption processing on the product of the UV processing of VOCs, and then performing the electric field dust removal processing.
56. Example 56 provided by the present invention: example 55 is included, wherein the adsorbent of the adsorption treatment is activated carbon and/or molecular sieve.
57. The utility model provides an example 57: including any one of examples 54-56, wherein the UV treatment employs at least one ultraviolet lamp.
58. The utility model provides an example 58: 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. The utility model provides an example 59: 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 185nm.
60. The utility model provides an example 60: 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. The utility model provides an example 61: 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. The utility model provides an example 62: 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. The utility model provides an example 63: example 62 is included, wherein the first electrode is a cathode.
64. Example 64 provided by the present invention: including any one of examples 62 or 63, wherein the first electrode is an extension of the electric field cathode.
65. The utility model provides an example 65: 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 present 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. The utility model provides an example 67: example 66 is included, wherein the second electrode is an anode.
68. Example 68 provided by the present invention: including examples 66 or 67, wherein the second electrode is an extension of the electric field anode.
69. The utility model provides an example 69: 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 present 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 present 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 present 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 ionizing dust-removing 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 present 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 present invention: example 73 includes 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. the utility model provides an example 75: example 73 is included, wherein 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 present 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 pole pitch 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. the utility model provides an example 77: 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 150mm.
78. The utility model provides an example 78: included is any one of examples 72-76, including selecting a pole pitch of the electric field anode and the electric field cathode to be 2.5-139.9mm.
79. The utility model provides an example 79: including any one of examples 72 to 76, comprising selecting a polar separation of the electric field anode and the electric field cathode of 5-100mm.
80. The utility model provides an example 80: including any one of examples 72 through 79, including selecting the electric field anode to be 10-180mm in length.
81. The utility model provides an example 81: including any one of examples 72 through 79, including selecting the electric field anode to have a length of 60-180mm.
82. The utility model provides an example 82: including any one of examples 72 through 81, comprising selecting the electric field cathode to have a length of 30-180mm.
83. The utility model provides an example 83: including any one of examples 72 through 81, comprising selecting the electric field cathode length to be 54-176mm.
84. Example 84 provided by the present invention: including any one of examples 72 through 83, wherein including selecting the electric field cathode to include at least one electrode rod.
85. The utility model provides an example 85: example 84 is included, wherein including selecting the diameter of the electrode rod to be no greater than 3mm.
86. The utility model provides an example 86: 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. The utility model provides an example 87: including any one of examples 72-86, wherein including selecting the electric field anode to be comprised of a hollow tube bundle.
88. Example 88 provided by the present 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. The utility model provides an example 89: example 88 is included, wherein selecting the polygon to be a hexagon.
90. The utility model provides an example 90: including any one of examples 87 to 89, wherein the tube bundle comprising the electric field anodes is selected to be honeycomb-shaped.
91. The utility model provides an example 91: including any one of examples 72 to 90, comprising selecting the electric field cathode to penetrate within the electric field anode.
92. The utility model provides an example 92: including any one of examples 72 through 91, wherein including the electric field anode size or/and the electric field cathode size is selected to provide an electric field coupling number of times ≦ 3.
93. The utility model provides an example 93: 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 present invention: included is any one of examples 54-93, wherein the products from UV treated VOCs contain particles smaller than 50nm, and wherein the removal of particles from the products from UV treated VOCs comprises removal of particles smaller than 50nm from the products from UV treated VOCs.
95. The utility model provides an example 95: 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. The utility model provides an example 96: included is any one of examples 54-95, wherein the products from which the UV-treated VOCs were removed include particles at 23nm, and wherein the products from which the UV-treated VOCs were removed include particles at 23 nm.
97. The utility model provides an example 97: included is any one of examples 54 to 96, wherein a removal rate of 23nm particles in the product after removal of UV-treated VOCs is 93% or more.
98. The utility model provides an example 98: 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 present 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 utility model discloses in, it is gaseous including all gases that contain VOCs.
In the utility model discloses in, the product after UV handles VOCs contains among the nano-particles "and indicates that the particle size is below 1 mu m.
Drawings
Fig. 1 is a schematic structural view of a VOCs gas treatment device 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 isbase:Sub>A viewbase:Sub>A-base:Sub>A of the electric field generating unit of fig. 2 in embodiment 2, embodiment 5 and embodiment 11 of the present invention.
Fig. 4 isbase:Sub>A viewbase:Sub>A-base:Sub>A of the electric field generating unit of fig. 2 marked with length and angle in embodiments 2 and 5 of the present invention.
Fig. 5 is a schematic structural diagram of an electric field device of two electric field levels in embodiment 2, embodiment 5, and embodiment 11 of the present invention.
Fig. 6 is a schematic structural view of an electric field device according to embodiment 16 of the present invention.
Fig. 7 is a schematic structural view of an electric field device according to embodiment 18 of the present invention.
Fig. 8 is a schematic structural view of an electric field apparatus according to embodiment 19 of the present invention.
Fig. 9 is a schematic flow chart of a test apparatus according to embodiment 20 of the present invention.
Fig. 10 is a time-dependent curve of the concentration of VOCs and the removal rate of VOCs at the device outlet of the device in the embodiment 20 of the present invention.
FIG. 11 shows the CO at the outlet of the device in the 20 electric field device of the present invention 2 Concentration 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 according to embodiment 20 of the present invention.
Fig. 13 is a schematic flow chart of a test apparatus according to embodiment 26 of the present invention.
Fig. 14 is a graph showing the time-dependent change of the concentrations of VOCs at the air inlet, the air outlet and the air outlet of the ultraviolet device in the case of purifying low VOCs in embodiment 26 of the present invention.
FIG. 15 shows the embodiment of the present invention in which the CO at the air inlet, the air outlet and the air outlet of the ultraviolet device is disposed when the low VOCs concentration is purified by 26 2 Concentration versus time curve.
Fig. 16 is a graph showing the time-dependent change of the concentrations of VOCs at the air inlet, the air outlet and the air outlet of the ultraviolet device in the case of purifying high VOCs in embodiment 26 of the present invention.
FIG. 17 shows a schematic view of an embodiment 26 of the present invention in which CO is disposed at the air inlet, the air outlet and the air outlet of the ultraviolet device when purifying high VOCs concentration 2 Concentration versus time curve.
Detailed Description
The following description is given for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be apparent to those skilled in the art from the disclosure of the present invention.
It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
In some embodiments of the present invention, a VOCs gas treatment device is provided, 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 VOCs gas treatment device further comprises an adsorption device, and the adsorption device is disposed in the flow channel of the VOCs gas treatment device. 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 an air inlet and an air outlet, the air inlet of the adsorption device is communicated with the air outlet of the ultraviolet device, and the air 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 technical effects obtained by UV treatment and electric field dust removal combined with purification of VOCs are as follows:
the utility model discloses people's research discovers, and the product that contains VOCs's gas after UV shines the processing is not merely CO 2 And H 2 O, also present are high molecular weight nano-sized solid particles, e.g., as confirmed by a large amount of experimental data: PM2.5 content in the product after UV treatment of VOCs is increased compared with that before UV irradiation, nano-scale particles in the product after UV treatment are greatly increased, wherein PN value of solid particles with the particle size of 23nm is increased by more than 1 time, and therefore secondary pollution can be caused if the product after UV irradiation treatment is directly discharged. Therefore, the UV treatment of gas containing VOCs requires consideration of removing nano-solid particles. However, the prior art has found no relevant research for removing nanoparticles, especially particles below 50nm, especially particles at 23nm, from the product after UV irradiation treatment. The utility model discloses the people finds that their utility model's electric field dust pelletizing system can effectively get rid of the nanoparticle in the UV shines the processing back result, especially the granule below 50nm, especially 23 nm's granule. 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 plays the following role:
firstly: the UV light can not completely treat VOCs in the gas into CO in the ultraviolet treatment stage 2 And H 2 O, will produce intermediates, nor will it degrade allOf VOCs in the adsorption apparatus H 2 O, products of UV light irradiation, e.g. O 3 、 OH - The intermediate products and the VOCs components which are not ready to be degraded are adsorbed and collected, and the UV intermediate products and the VOCs components which are not ready to be degraded which are adsorbed in the pore canal of the adsorbing material are O 3 、OH - Further decomposing into CO under the action of an equal-strength oxidant 2 And H 2 O, from desorption in the adsorbing material pore, play the auxiliary action to UV illumination treatment 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 O 3 、OH - Further oxidizing and decomposing again under the action of an equal-strength oxidant; when the concentration of VOCs is very low, strong oxidized ion hydroxyl free radical (OH) generated by the ultraviolet device enters the adsorption device to further catalyze the VOCs stored in the adsorption material into CO 2 And H 2 And 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 O 3 Fully utilizes the ozone and avoids secondary pollution caused by the ozone.
In an embodiment of the utility model, the combination of ultraviolet purification and adsorption purification has improved the gaseous efficiency of UV purification VOCs, has practiced thrift the energy consumption for the gaseous processing apparatus of VOCs is miniaturized.
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 ultraviolet light or double-peak ultraviolet light.
In some embodiments of the present invention, the ultraviolet lamp provides a single-peak ultraviolet light with a main peak of 253.7nm or 185nm.
In some embodiments of the present invention, the dominant peak of the dual-peak ultraviolet light provided by the ultraviolet lamp is 253.7nm and 185nm, respectively.
In some embodiments of the present invention, the adsorbing device is provided with an adsorbing material, the adsorbing material includes but is not limited to activated carbon, molecular sieve, and any adsorbing material capable of adsorbing at least one substance of the products and intermediates of other VOCs and VOCs produced in the photolysis process, ozone oxidation process, UV light excitation oxidation process, etc., such as the photolysis product O of the adsorbable VOCs 3 The 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 treating 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 adsorbing the product of UV processing of VOCs, and then performing electric field dust removal processing.
In an embodiment of the present invention, the adsorbent for the adsorption treatment is activated carbon and/or molecular sieve.
In an embodiment of the present invention, at least one ultraviolet lamp is used for the UV irradiation treatment.
In an embodiment of the present invention, the UV light provided by the UV lamp is single-peak ultraviolet light or double-peak ultraviolet light.
In an embodiment of the present invention, the main peak of the single-peak ultraviolet light provided by the ultraviolet lamp is 253.7nm or 185nm.
In an embodiment of the present invention, the dominant peak of the dual-peak ultraviolet light provided by the ultraviolet lamp is 253.7nm and 185nm, respectively.
In an embodiment of the present invention, the product after the UV treatment of the VOCs contains nanoparticles, and the removal of the nanoparticles in the product after the UV treatment of the VOCs includes the removal of the nanoparticles in the product after the UV treatment of the VOCs.
In an embodiment of the present invention, the product after the UV treatment of the VOCs contains particles smaller than 50nm, and the particles in the product after the UV treatment of the VOCs include particles smaller than 50nm in the product after the UV treatment of the VOCs.
In an embodiment of the present invention, the product after the UV treatment of the VOCs contains 15 to 35 nm particles, and the particles in the product after the UV treatment of the VOCs include 15 to 35 nm particles in the product after the UV treatment of the VOCs.
In an embodiment of the present invention, the product after the UV treatment of the VOCs contains 23nm particles, and the particles in the product after the UV treatment of the VOCs include 23nm particles in the product after the UV treatment of the VOCs.
In an embodiment of the present invention, the removal rate of the 23nm particles in the product after removing the UV-treated VOCs is greater than or equal to 93%.
In an embodiment of the present invention, the removal rate of the 23nm particles in the product after removing the UV-treated VOCs is not less than 95%.
In an embodiment of the present invention, the removal rate of the 23nm particles in the product after removing 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 an embodiment of the present invention, the diameter of the cathode filament is not greater than 3mm. In an embodiment of the present invention, the cathode wire uses a metal wire or an alloy wire which is easy to discharge, is temperature-resistant and can support its own weight, and is electrochemically stable. 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 3mm. In an embodiment of the present invention, the cathode rod is a metal rod or an alloy rod which is easy to discharge. 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 in the electric field anode.
In one embodiment of the present invention, the electric field anode comprises one or more hollow anode tubes arranged in parallel. When there are several hollow anode tubes, all the hollow anode tubes constitute 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 trilateral, 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 circle inscribed in the tube of the hollow anode tube ranges from 5mm to 400mm.
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 electric field device inlet, and the second anode portion is close to the electric field device outlet. 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 insulation mechanism is disposed outside the electric field flow channel to prevent or reduce dust in the gas from accumulating on the insulation mechanism, resulting in breakdown or conduction of the insulation mechanism.
In an embodiment of the present invention, the insulating mechanism is a high voltage ceramic insulator to insulate between 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 present invention, the first anode portion of the electric field anode is located in front of the cathode supporting 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 cause short circuit and ignition of the insulating mechanism. 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 knob. The design of first positive pole portion mainly is in order to protect insulating knob insulator not to be polluted by particulate matter etc. 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 failure of electric field positive pole, so the design of first positive pole 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 portion 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, pollution to the insulating mechanism is reduced, and the cleaning 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 present invention, the length of the first anode portion occupies 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 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 one embodiment of the present 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, the insulating mechanism is disposed outside the electric field flow channel 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. Therefore, the insulating mechanism is suspended outside the electric field anode. In an embodiment of the present invention, the insulating mechanism may be made of non-conductive temperature-resistant material, such as ceramic, glass, etc. In an embodiment of the present invention, the insulation of the completely airtight and air-free material requires an insulation thickness of >0.3mm/kv; air insulation requirements >1.4mm/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 an embodiment of the present invention, the insulating mechanism uses ceramic, and the surface 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 the 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 present invention, the insulating portion may also be tower-shaped.
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 is close to the dew point, the heating rod is started and heats. 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 utility model, the afterbody of insulating part needs the condensation position to insulate against heat equally, prevents environment and heat dissipation high temperature heating condensation subassembly.
In the utility model discloses an in the embodiment electric field device's the lead-out wire of power use umbelliform cluster ceramic column or glass post to cross the wall formula and connect, use elasticity to bump the head in the wall and connect the cathode support board, use airtight insulation protection terminal cap plug to connect outside the wall, the lead-out wire crosses the ceramic insulation distance that wall conductor and wall insulation distance are greater than umbelliform cluster ceramic column or glass post. In the utility model discloses a high-pressure part cancel lead wire in the embodiment, and direct mount ensures safety on the end, and the whole external insulation of high-voltage module uses ip68 protection, uses the heat dissipation of medium heat transfer.
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 the first electric field generating units may include 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 there are a plurality of first electric field stages, the first electric field stages are connected in series. In an embodiment of the present invention, the electric field apparatus further comprises a plurality of connecting housings, and the first electric field stages connected in series are connected by 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 present 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 50kv; the design firstly considers the temperature-resistant conditions, the interpolar distance and the temperature parameters: 1MM is woven into a fabric of 30 degrees, the dust accumulation area is more than 0.1 square/kilocubic meter/hour, the length of an electric field is more than 5 times of that of an inscribed circle of a single tube, and the air flow velocity of the electric field is controlled to be less than 9 meters/second. In one 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 present 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/1MM.
The utility model discloses a research of utility model people discovers that current electric field device gets rid of the shortcoming that efficiency is poor, the energy consumption is high and is aroused by the electric field coupling. The utility model discloses a reduce electric field coupling number of times, can show the size (be the volume) that reduces electric field device. For example, the utility model provides an ionization dust collector's size is about one fifth of current ionization dust collector size. The reason is that, in order to obtain an acceptable particle removal rate, the gas flow rate is set to be about 1m/s in the existing ionization dust removing device, and the utility model can still obtain a higher particle removal rate under the condition that the gas flow rate is increased 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.
Additionally, the utility model discloses can show improvement granule and get rid of efficiency. For example, the prior art electric field device can remove about 70% of the particulate matter in the engine exhaust when the gas flow rate is about 1m/s, but the present invention can remove about 99% of the particulate matter even when the gas flow rate is 6 m/s.
Because the utility model discloses the people has found the effect of electric field coupling to found the method that reduces electric field coupling number of times, the utility model discloses the result that has obtained the aforesaid and has not expected.
The utility model provides a method for reducing electric field coupling number of times as follows:
in an 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 certain embodiments of the utility model, a VOCs gas treatment device is provided, include: 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 the dust deposition area of the electric field anode to the 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 distance between the electric field anode and the electric field cathode, the electric field anode length and the electric field cathode length make the coupling frequency of the ionization dust removal electric field 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:
performing UV treatment on the VOCs gas to obtain a product after the VOCs are subjected to UV treatment;
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.
The electric field device of the utility model forms an ionization dust removal electric field between the electric field cathode and the electric field anode. In order to reduce the electric field coupling generated by 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, the 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 electric field cathode, for example, if the electric field cathode is rod-shaped, the discharge area is the rod-shaped external surface area.
The utility model discloses an in some embodiments, provide a VOCs gas treatment device, include: 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 includes: 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 10-180mm.
In an embodiment of the present invention, the length of the electric field anode is 60-180mm.
In an embodiment of the present invention, the length of the electric field anode is set to make the coupling frequency of the ionizing dust-removing electric field 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 an embodiment of the present invention, the length of the electric field anode is selected to be 10-180mm.
In an embodiment of the present invention, the length of the electric field anode is selected to be 60-180mm.
The utility model discloses an in some embodiments, provide a VOCs gas treatment device, include:
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 30-180mm.
In an embodiment of the present invention, the length of the electric field cathode is 54-176mm.
In an embodiment of the present invention, the length of the electric field anode is set to make the coupling frequency of the ionizing dust-removing electric field 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 number of electric field coupling times less than or equal to 3.
In an embodiment of the invention, the method comprises selecting the length of the electric field cathode to be 30-180mm.
In one embodiment of the present invention, the method comprises selecting the length of the electric field cathode to be 54-176mm.
In certain embodiments of the utility model, a VOCs gas treatment device is provided, include: 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 includes: 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 150mm.
In an embodiment of the present invention, the distance between the electric field anode and the electric field cathode is 2.5-139.9mm.
In an embodiment of the present invention, the distance between the electric field anode and the electric field cathode is 5-100mm.
In an embodiment of the present invention, the distance between the electric field anode and the electric field cathode is such that the coupling frequency of the ionization dust-removing electric field is 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:
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 one embodiment of the present invention, the distance between the electric field anode and the electric field cathode is selected to be 2.5-139.9mm.
In an embodiment of the present invention, the distance between the electric field anode and the electric field cathode is selected to be 5-100mm.
In an embodiment, the electric field dust removing processing method provided by the present invention 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 to make the number of electric field coupling times 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 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 interpolar distance between the electric field anode and the electric field cathode is selected to be less than 150mm.
Preferably, the distance between the electric field anode and the electric field cathode is selected to be 2.5-139.9mm. More preferably, the inter-polar distance between the electric field anode and the electric field cathode is selected to be 5.0-100mm.
Preferably, the length of the electric field anode is selected to be 10-180mm. More preferably, the length of the electric field anode is selected to be 60-180mm.
Preferably, the length of the electric field cathode is selected to be 30-180mm. More preferably, the length of the electric field cathode is selected to be 54-176mm.
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 selected, the electric field anode to the inter-polar distance between the electric field cathodes, the electric field anode length and the electric field cathode length 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 present invention, the length of the electric field anode may 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 30mm. 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 present 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 make the electric field anode and the electric field device have high temperature resistance, and make the electric field device have high efficiency dust collecting capability under high temperature impact.
In an embodiment of the present invention, the length of the electric field cathode may 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 30mm. The length of the electric field cathode refers to the minimum length from one end of the working surface of the electric field cathode to the other end. The length of the electric field cathode is selected to effectively reduce electric field coupling.
In an embodiment of the present 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 make the electric field cathode and the electric field device have high temperature resistance, and make the electric field device have high efficiency dust collecting capability under high temperature impact.
In an embodiment of the present invention, the distance between the electric field anode and the electric field cathode may 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 2.5mm. The distance between the electric field anode and the electric field cathode is also referred to as the interpolar distance. 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 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, a VOCs gas processing apparatus is provided, including: 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, a VOCs gas processing apparatus is provided, including: 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 the inlet of the ionization dust-removing electric field.
In an embodiment of the present 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 and the electric field anode have an included angle α, and α is greater than 0 ° and less than or equal to 125 °, or α is greater than or equal to 45 ° and less than or equal to 125 °, or α is greater than or equal to 60 ° and less than or equal to 100 °, or α =90 °.
In an embodiment of the present 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-removing electric field.
In an embodiment of the present 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 an embodiment of the present invention, the second electrode of the auxiliary electric field unit and the electric field cathode have an included angle α, and α is greater than 0 ° and less than or equal to 125 °, or α is greater than or equal to 45 ° and less than or equal to 125 °, or α is greater than or equal to 60 ° and less than or equal to 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 disposed independently.
In some embodiments of the present invention, the electric field dust removing processing method provided by the present invention further includes a method for providing an auxiliary electric field, comprising 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 present invention, the auxiliary electric field is generated by the auxiliary electric field unit.
In the present invention, the ionization dust removal 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 present 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 field, can be formed by one or two auxiliary electrodes, which can be placed at the inlet or outlet of the ionizing dedusting electric field when the second electric field is formed by one auxiliary electrode, which can be charged at a negative potential, or at a positive potential. 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 degree and less than or equal to 125 degrees, or more than 45 degrees and less than or equal to 125 degrees, or more than 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 above embodiments and is not limited to the following embodiments.
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 54mm.
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 installed on the cathode supporting plate 10143, and the cathode supporting 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 an embodiment of the present invention, the electric field anode 10141 includes a first anode portion 101412 and a second anode portion 101411, i.e. the first anode portion 101412 is close to the electric field device inlet, and the second anode portion 101411 is close to the electric field device outlet. The cathode support plate and the insulating means are disposed between the first anode portion 101412 and the second anode portion 101411, that is, the insulating means 1015 is disposed in the middle of the ionization electric field or in the middle of the electric field cathode 10142, so as to provide a good support for the electric field cathode 10142 and fix the electric field cathode 10142 relative to the electric field anode 10141, so as to maintain a predetermined distance 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 apparatus, 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 interpole distance L3 of electric field anode 4051 and electric field cathode 4052 is 9.9mm, and electric field anode 4051 length L1 is 60mm, and electric field cathode 4052 length L2 is 54mm, 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, has contained angle α between the exit end of electric field anode 4051 and the nearly exit end of electric field cathode 4052, and α =118, and then under the effect of electric field anode 4051 and electric field cathode 4052, can collect more the material of treating, realizes that the 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, save electric field electric energy 30-50%.
The electric field device in the embodiment comprises a plurality of electric field stages formed by a plurality of electric field generating units, wherein 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 electric field anode 4051 and the 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 interpole distance of electric field positive pole 4051 and electric field negative pole 4052 is 139.9mm, and electric field positive pole 4051 length is 180mm, and electric field negative pole 4052 length is 180mm, electric field positive pole 4051 includes the fluid passage, the fluid passage includes entrance point and exit end, electric field negative pole 4052 arranges in the fluid passage, electric field negative pole 4052 extends along the direction of collection dirt utmost point fluid passage, and the entrance point of electric field positive pole 4051 flushes with the nearly entrance point of electric field negative pole 4052, and the exit end of electric field positive pole 4051 flushes with the nearly exit end of electric field negative pole 4052, and then under electric field positive pole 4051 and electric field negative pole 4052's effect, can collect more the material of treating, realizes that the electric field coupling number of times is less than or equal to 3, can reduce the coupling consumption of electric field to treating the processing gas, save electric field electric energy 20-40%.
The substance to be treated in this embodiment is a particulate matter 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 electric field anode 4051 and the 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 hexagon tube, the electric field cathode 4052 is in the shape of a rod, 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 interpole of electric field positive pole 4051 and electric field negative pole 4052 is 2.4mm, and electric field positive pole 4051 length is 30mm, and electric field negative pole 4052 length is 30mm, electric field positive pole 4051 includes fluid passage, fluid passage includes entrance point and exit end, electric field negative pole 4052 arranges in among the fluid passage, electric field negative pole 4052 extends along the direction of collection dirt utmost point fluid passage, and electric field positive pole 4051's entrance point flushes with electric field negative pole 4052's nearly entrance point, and electric field positive pole 4051's exit end flushes with electric field negative pole 4052's nearly exit end, and then under electric field positive pole 4051 and electric field negative pole 4052's effect, can collect more the material of treating, realizes that the electric field coupling number of times is less than or equal to 3, can reduce the coupling consumption of electric field to treating the processing gas, saves electric field electric energy 10-30%.
The substance to be treated in this embodiment is a particulate matter in the UV purified product.
Example 5
The electric field generating unit in this embodiment can be applied to an electric field apparatus, 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 interpole of electric field anode 4051 and electric field cathode 4052 is 9.9mm, and electric field anode 4051 is 60mm in length, and electric field cathode 4052 is 54mm in length, 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 utmost point fluid passage, and the entrance end of electric field anode 4051 flushes with the nearly entrance end of electric field cathode 4052, has contained angle α between the exit end of electric field anode 4051 and the nearly exit end of electric field cathode 4052, and α =118 °, 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 generating unit's collection 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 a plurality of electric field generating units, wherein 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 embodiment is a particulate matter 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 electric field anode 4051 and the 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 2.4mm. 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 point 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 point flushes with electric field cathode 4052's nearly entrance point, 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, guarantee that this electric field device's collection efficiency is higher, and typical granule pm 0.23 collection efficiency is 99.99%, and typical 23nm granule removal efficiency is 99.99%.
In this embodiment, the anode 4051 and the cathode 4052 form 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 embodiment is a particulate matter 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 electric field anode 4051 and the 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 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 length of the electric field anode 4051 is 5cm, the length of the electric field cathode 4052 is 5cm, 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 collecting electrode, 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 is flush with the proximal outlet end of the electric field cathode 4052, the distance between the electric field anode 4051 and the electric field cathode 4052 is 9.9mm, and the electric field anode 4051 and the electric field cathode 4052 are further resistant to high temperature impact, and can collect more substances to be treated, thereby ensuring higher dust collecting efficiency of the electric field generating unit. 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 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 length of the electric field anode 4051 is 9cm, the length of the electric field cathode 4052 is 9cm, 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 collecting electrode, 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 is flush with the proximal outlet end of the electric field cathode 4052, the distance between the electric field anode 4051 and the electric field cathode 4052 is 139.9mm, and the electric field anode 4051 and the electric field cathode 4052 are further resistant to high temperature impact, and can collect more substances to be treated, thereby ensuring higher dust collecting efficiency of the electric field generating unit. 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 have the same polarity, and the cathodes of the storage electric fields have 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 apparatus, 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 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 length of the electric field anode 4051 is 1cm, the length of the electric field cathode 4052 is 1cm, 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 collecting electrode, 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 is flush with the proximal outlet end of the electric field cathode 4052, the distance between the electric field anode 4051 and the electric field cathode 4052 is 2.4mm, and the electric field anode 4051 and the electric field cathode 4052 are further resistant to high temperature impact, and can collect more substances to be treated, thereby ensuring higher dust collecting efficiency of the electric field generating unit. 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 electric field anode 4051 and the 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 =90 °, the distance between the electric field anode 4051 and the electric field cathode 4052 is 20mm, and further, the electric field anode 4051 and the electric field cathode 4052 are under the effect of making them resistant to high temperature impact, and further collecting more substances to be processed, thereby ensuring higher dust collecting efficiency of the electric field generating unit. The dust collection efficiency corresponding to the electric field temperature of 200 ℃ is 99.9 percent; the dust collection efficiency corresponding to the electric field temperature of 400 ℃ is 90 percent; 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 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 apparatus, 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: selecting a ratio of a dust collecting area of the electric field anode 4051 to a discharging area of the electric field cathode 4052 as 27.566, wherein a distance between poles of the electric field anode 4051 and the electric field cathode 4052 is 2.3mm, a length of the electric field anode 4051 is 5mm, a 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 disposed in the fluid channel, the electric field cathode 4052 extends along a direction of the dust collecting pole fluid channel, the inlet end of the electric field anode 4051 is flush with a near inlet end of the electric field cathode 4052, the outlet end of the electric field anode 4051 is flush with a 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 13
The electric field generating unit in this embodiment can be applied to an electric field apparatus, 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 1.108, the inter-pole distance between the field anode 4051 and the field cathode 4052 was 2.3mm, and the 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 apparatus, 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 electric field anode 4051 and the 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 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 purification 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: selecting the ratio of the dust collecting area of the electric field anode 4051 to the discharging area of the electric field cathode 4052 as 1.338, wherein the distance 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 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, 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 purification 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 electric 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 the present 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 in the form of a tube, 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 electric field cathode 5081, and the auxiliary electric field applies a backward force to the flow of negatively charged oxygen ions between the electric field anode 5082 and the electric 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 cannot generate stronger collision when being combined with the substances to be treated, so that the larger energy consumption caused by the stronger 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 dust removal efficiency of the electric field device is higher.
In addition, as shown in FIG. 6, in the present embodiment, the rear end of the anode 5084 and the rear end of the electric field cathode 5081 form an angle α, 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 which can direct an ion flow.
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 are both at a negative potential and the electric field anode is at 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 the 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 mode. Meanwhile, the auxiliary electrode is also in a rod shape in the embodiment, and the auxiliary electrode and the electric field cathode form a cathode rod. The front end of the cathode bar exceeds the front end of the electric field anode forwards, and the part of the cathode bar exceeding the electric field anode forwards is the auxiliary electrode. That is, in this embodiment, the lengths of the electric field anode and the electric field cathode are the same, 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 gas containing substances to be treated flows into the tubular electric field anode 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 and backwards, and because the oxygen ions have backward moving speed, the oxygen ions cannot generate stronger collision when being combined with the substances to be treated, so that the larger energy consumption caused by the stronger 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, more substances to be treated can be collected, and the dust removal efficiency of the electric field device is higher.
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 electric 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 positioned opposite to each other in the front-rear direction, and the auxiliary electrode 5083 is positioned 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 electric 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 the gas containing the substances to be treated flows into the electric field between the electric field anode 5082 and the electric field cathode 5081 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, more substances to be treated can be collected, and the higher dust removal efficiency of the electric field device is ensured.
Example 20UV photolysis + ionization dust removal
The embodiment provides a method for treating VOCs gas, which comprises the following steps:
performing UV purification treatment on the gas containing VOCs 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 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 =90 °.
1 Main test device and Material
1) VOCs stock solution (Industrial banana oil)
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, and mixed wavelength of 254nm;
3) Electric field device: the electric field device of example 1 was used;
4) VOCs concentration detection instrument and CO 2 A 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 quantity of the solid particles is detected by using a laser dust particle counter according to 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, the clean space enters the air humidification tank 1, the humidity of the clean air is adjusted in the air humidification tank 1, and the raw liquid of the VOCs is stored in the storage tank of the VOCs2, mixing the clean air from the air humidifying tank 1 and the VOCs stock solution from the VOCs storage tank 2 in a mixing buffer tank 3, controlling the gas flow of the clean air and the VOCs stock solution, and respectively controlling the gas flow and the concentration of the mixed gas (VOCs gas for short) containing VOCs to be 0.95m 3 /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 5 2 Concentration content, PM2.5 value; the PN values of the solid particles with different sizes in the gas are detected at the gas inlet 41 of the ultraviolet device, the gas outlet 42 of the ultraviolet device and the outlet 52 of the electric field device 5, 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. 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 0.95m 3 H, initial concentration 320mg/m 3 The 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 717s;
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 carrying out 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.
3.1VOCs concentration variation
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 curve of the concentration of VOCs at the outlet of the electric field device and the change of the VOCs removal rate along with time is shown in FIG. 10, wherein A is the concentration of VOCs at the outlet of the electric field device (namely the concentration of VOCs at the outlet of the ultraviolet device), and B is the removal rate of VOCs. As can be seen from FIG. 10, the concentration of VOCs in 80s of UV lamp treatment was maintained at 320mg/m 3 The 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/m 3 The removal efficiency is as high as about 37.1%.
3.2UV purification of CO from VOCs products 2 Change in concentration
FIG. 11 shows the CO at the outlet of the electric field apparatus 2 Curve of concentration as a function of treatment time, CO 2 The initial concentration was 903.3mg/m 3 As can be seen from FIG. 11, the UV lamp is turned on and then CO is turned off 2 The concentration increased rapidly, and when the treatment time reached 453s, CO was added 2 The concentration reaches 1126mg/m 3 Then CO is present 2 The concentration is 1135mg/m 3 Remain relatively stable within the range. It can be seen that the opening of the dedusting electric field is opposite to the CO 2 The amount of production of (2) has little influence.
3.3PM 2.5 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 being 25 μ g/m when the UV lamp and the electric field device are not turned on 3 (ii) a As can be seen from FIG. 12, after the UV device was turned on alone, PM2.5 increased rapidly, and the final PM2.5 value was maintained at 5966 μ g/m 3 About, i.e., PM2.5 increased by about 240 times.
Starting a direct-current power supply of the electric field device in 717s, carrying out 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 valueTo 10. Mu.g/m 3 The 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/m 3 And the PM2.5 removal efficiency reaches 100 percent.
3.4PN 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 primary gas are detected, and the particle number (PN value) distribution of the solid particles with different sizes in the VOCs primary gas is shown in the 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 can be seen from Table 3, PN values of solid particles of 23nm, 0.3 μm, 0.5 μm, 1.0 μm, 3.0 μm, 5.0 μm and 10 μm were increased to 2585933682 particles/m 3 122762968 pieces/m 3 122596749 tablets/m 3 120574982/m 3 117328622/m 3 112109682/m 3 105862049/m 3 。
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 remarkably, as can be seen from table 4, the removal efficiencies of the 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 the 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 conditions areAfter the lower electric field was turned on for 60s, it can be seen from Table 5 that the solid particles at 23nm and 0.3 μm were reduced to 1584849/m 3 And 103180/m 3 The 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 direct current power supply of the electric field device are adjusted to 9.10kV and 2.98mA, and the experiment for removing the 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 are further reduced to 229283 particles/m 3 23322/m 3 And 9894/m 3 And 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 4PN data after purification under electric field conditions of 5.13kV and 0.15mA
TABLE 5 PN data after clean-up in electric field of 7.07kV and 0.79mA
TABLE 6 PN data after purification under 9.10kV 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 0.95m 3 H, initial concentration 320mg/m 3 The VOCs are sequentially led into an ultraviolet device and an electric field device.
2.1 Change in concentration of VOCs
The concentration of VOCs varied in the same manner as in example 20.
2.2 UV purification of VOCs product CO 2 Change in concentration
UV purification of VOCs product CO 2 The 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/m 3 The 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/m 3 And the PM2.5 removal efficiency reaches 100 percent.
2.4 PN data analysis
When the ultraviolet device and the electric field device are not started, the PN value contents of solid particles with different sizes in the VOCs raw gas are detected as shown in the table 2.
After the ultraviolet device is turned on alone (the ionization dust removal device is not turned on), and the maximum purification efficiency of the VOCs is achieved, solid particulate matter PN of various sizes in the gas at the outlet of the dust removal region is greatly increased, and the experimental data is shown in table 3 and is 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 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 conditions, as can be seen from table 8, 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%.
1317s, adjusting the parameters of the direct-current power supply of the electric field device to 9.10kV and 2.98mA, performing an experiment for removing the organic solid particles, and referring to the experimental data in table 9, wherein the data in table 9 are average values of 6 times of sampling. Under the condition of the electric field, the solid particles of 23nm, 0.3 μm and 0.5 μm further drop to 564 nm and 82/m 3 And 7/m 3 And the removal efficiency reaches 99.99 percent.
TABLE 7 PN data after purification under electric field conditions of 5.13kV and 0.15mA
TABLE 8 PN data after clean-up in electric field of 7.07kV and 0.79mA
TABLE 9 PN data after purification under the conditions of 9.10kV and 2.98mA electric field
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 0.95m 3 H, initial concentration 320mg/m 3 The VOCs are sequentially introduced into an ultraviolet device and an electric field device.
2.1 Variation in concentration of VOCs
The concentration of VOCs varied in the same manner as in example 20.
2.2 UV purification of VOCs product CO 2 Change in concentration
UV purification of VOCs product CO 2 The 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/m 3 The 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/m 3 And the PM2.5 removal efficiency reaches 99.99%.
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 when the maximum purification efficiency of the 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 are shown in the table 10, and the data in the table 10 are average values of 6 times of sampling. After the electric field is turned on for 60s under the conditions, 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 shown in 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 the organic solid particles, wherein the experimental data refer to 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/m 3 8 pieces/m 3 And 0 pieces/m 3 The removal efficiency reaches 99.99 percent.
TABLE 10 PN data after purification under 5.13kV and 0.15mA electric field conditions
TABLE 11 PN data after decontamination under electric field conditions of 7.07kV and 0.79mA
TABLE 12 PN data after purification under the conditions of 9.10kV and 2.98mA electric field
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 0.95m 3 H, initial concentration 320mg/m 3 The VOCs are sequentially led into an ultraviolet device and an electric field device.
2.1 Variation in concentration of VOCs
The concentration of VOCs varied in the same manner as in example 20.
2.2 UV purification of VOCs product CO 2 Change in concentration
UV purification of VOCs product CO 2 The concentration trend was the same as in example 20.
2.3 PM2.5 data analysis
When the ultraviolet device is turned on alone, the change trend of the PM2.5 value in the gas with the processing time is the same as that of 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 field, and starting the electric field device for 60s to reduce the PM2.5 value to 0.02 mu g/m 3 The 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 to set the electric field straightAdjusting the parameters of a flow power supply to 9.10kV and 2.98mA, and carrying out 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/m 3 And the PM2.5 removal efficiency reaches 99.99%.
2.4 PN data analysis
When the ultraviolet device and the electric dust removal device are not started, the PN value contents of solid particles with different sizes in the VOCs raw gas are detected as shown in the table 2.
After the ultraviolet device is independently started (the ionization dust removal device is not started), and when the maximum purification efficiency of the 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 conditions, the PN of the gas at the outlet of the dust removal region is significantly reduced, and as can be seen from table 13, 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%.
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 sizes of 23nm, 0.3 μm, 0.5 μm, 1.0 μm, 3.0 μm, 5.0 μm and 10 μm reaches 99.9%.
1317s, adjusting the parameters of the direct-current power supply of the electric field device to 9.10kV and 2.98mA, performing an experiment for removing the organic solid particles, and referring to the experimental data in table 15, wherein the data in table 15 are average values of 6 times of sampling. 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 3 0, m 3 And 0 pieces/m 3 The removal efficiency is 99.99%.
TABLE 13 PN data after decontamination under electric field conditions of 5.13kV and 0.15mA
TABLE 14 PN data after decontamination under electric field conditions of 7.07kV and 0.79mA
TABLE 15 PN data after purification under 9.10kV 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 0.95m 3 H, initial concentration 320mg/m 3 The VOCs are sequentially led into an ultraviolet device and an electric field device.
2.1 Change in concentration of VOCs
The concentration of VOCs varied in the same manner as in example 20.
2.2 UV purification of VOCs product CO 2 Change in concentration
UV purification of VOCs product CO 2 The concentration trend was the same as in example 20.
2.3 PM2.5 data analysis
When the ultraviolet device is turned on alone, the change trend of the PM2.5 value in the gas with the processing time is the same as that of 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/m 3 And 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 solid particles with different sizes in the VOCs raw gas 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 the VOCs is achieved, solid particle 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 conditions, 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 shown in 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 3 0, m 3 And 0 pieces/m 3 And the removal efficiency reaches 99.99 percent.
TABLE 16 PN data after decontamination under electric field conditions of 5.13kV and 0.15mA
TABLE 17 PN data after clean-up under electric field conditions of 7.07kV and 0.79mA
TABLE 18 PN data after purification under the conditions of 9.10kV and 2.98mA electric fields
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 results
The initial flow rate is 0.95m 3 H, initial concentration 320mg/m 3 The VOCs are sequentially introduced into an ultraviolet device 4 and an electric field device 5.
2.1 Variation in concentration of VOCs
The concentration of VOCs varied in the same manner as in example 20.
2.2 UV purification of VOCs product CO 2 Change in concentration
UV purification of VOCs product CO 2 The concentration trend was the same as in example 20.
2.3 PM2.5 data analysis
When the ultraviolet device is turned on alone, the change trend of the PM2.5 value in the gas with the processing time is the same as that of 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/m 3 The 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/m 3 And 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 the VOCs is achieved, solid particle 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 electric field condition, solid particles of 23nm, 0.3 μm and 0.5 μmDown to 5333/m 3 0, m 3 And 5/m 3 The removal efficiency reaches 99.99 percent.
TABLE 19 PN data after purification under electric field conditions of 5.13kV and 0.15mA
TABLE 20 PN data after clean-up under electric field conditions of 7.07kV and 0.79mA
TABLE 21 PN data after purification under 9.10kV 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, and mixed wavelength of 254nm
c. Adsorbent and method of making same
21AE hydrophobic molecular sieve;
industrial honeycomb activated carbon;
VOCs instrument, CO 2 Instrument, O 3 Instrument, 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 VOCs 3 Analysis of experimental data
3.1.1 fixed parameters
A150W U-shaped ultraviolet ray is mounted in the ultraviolet ray device 4The lamp tube 43 and the adsorption device 6 are respectively filled with 25.1g of molecular sieve 63 and 30.8g of active 64. The humidity of the VOCs gas entering the inlet 41 of the ultraviolet device 4 is controlled to 90% RH or more by bubbling of clean air. Adjusting the gas flow of clean air and the stock solution of VOCs, and controlling the gas flow and concentration of VOCs to be 0.9m 3 H and 614mg/m 3 See 23 for other experimental parameters.
TABLE 23
3.1.2 purification Process VOCs variation data at the outlet of each purification Unit
3.1.2.1 Concentration of VOCs
Fig. 14 is a graph showing the time course of the concentrations of VOCs at the inlet 41 and outlet 42 of the ultraviolet apparatus 4 and the outlet 62 of the adsorption apparatus 6 when purifying low VOCs, where a is shown as the concentration of VOCs at the outlet of the buffer tank, B is shown as the concentration of VOCs at the outlet 42 of the ultraviolet apparatus 4, and C is shown as the concentration of VOCs at the outlet 62 of the adsorption apparatus 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 test 3 The combined purification efficiency during this period reaches 98.5%.
At around 800s (13 min), the concentration of VOCs =30mg/m at the outlet 62 of the adsorption device 6 3 (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) 3 At this time, the concentration of the gas outlet of the ultraviolet device is 219mg/m 3 I.e. the concentrations before and after adsorption purification are basically equal, molecular sieve + activityThe carbon-carbon combined adsorbent is saturated and fails to work, and cannot adsorb and purify VOCs, and the saturated adsorbent needs to be replaced and 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 purification Process Each purification Unit Outlet CO 2 Change data
FIG. 15 shows the CO at the inlet, outlet and outlet of the ultraviolet device during purification of low VOCs concentration 2 Concentration profile over time, where A is shown as CO at the outlet of the buffer tank 2 Concentration, B, is shown as CO at the outlet of the UV device 2 Concentration, C, as CO at the outlet of the gas outlet of the adsorption unit 2 And (4) concentration. As can be seen from FIG. 15, the inlet CO of the UV device 2 The concentration is kept at 852mg/m as a whole 3 Average level of (a), when the UV maximum VOCs purification efficiency is reached, CO at the outlet of the ultraviolet device 2 The concentration is basically maintained at a relatively stable level, namely 1284mg/m 3 ，CO 2 The new generation rate after UV purification is stabilized at about 50.7%.
CO at the outlet of the adsorption device 2 The concentration reaches a maximum of 1584mg/m after 360s 3 And then maintained at a relatively constant level of 1472mg/m 3 I.e. CO purified in combination 2 The new generation rate is stabilized at about 72.8%.
Comparing CO at outlets of UV purification device and adsorption device 2 The concentration and the rate of formation of the new gas of (A) are shown as the CO in the adsorption apparatus 2 The concentration and the new generation rate of (2) are still greatly increased due to VOCs and O at the outlet of the UV unit 3 After entering the adsorption zone, the H2O can be adsorbed on the outer surfaces of the molecular sieve and the activated carbon and the inner surfaces of the pore passages, and the catalytic oxidation decomposition of VOCs is continuously carried out to generate CO 2 And further purifying VOCs in the waste gas.
3.1.2.3 comparison of PM2.5 data at the beginning of Combined purification and at the end of Combined purification
0.9m before the start of the formal combined cleanup experiment 3 H and 614mg/m 3 Has a PM2.5 value of 79 [ mu ] g/m in VOCs gas 3 After the 7200s purification experiment, the PM2.5 value in the gas at the outlet of the adsorption device rises to 6096 mu g/m 3 PM2.5 increased nearly 77-fold.
On the one hand, the VOCs are decomposed to generate CO in the processes of UV photolysis and photooxidation 2 And 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 of high VOCs concentration of 1105mg/m 3 Analysis 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 0.9m 3 H and 1105mg/m 3 See table 24 for specific parameters.
Watch 24
| Air temperature | 19℃ | Humidity of air | 70％R | Atmospheric pressure | Atmospheric pressure |
| UV lamp wavelength | 185nm+25 | UV lamp tube power | 150W | Residence time in UV purification zone | 18.2S |
| VOCs bulk gas stream | <0.04m3/h | Air gas flow | 1.1m3/ | Buffer tank outlet VOCs | 0.9m 3 /h |
| 21AE molecular sieve packing | 23.6g | 21AE molecular sieve | 4.0g | Photolysis zone entrance initiation | 17μg/m 3 |
| Loading of activated carbon | 30.0g | Activated carbon weight gain | 1.1g | Final outlet of adsorption zone | 5580 |
| Buffer tank gas humidity | >90％RH |
3.2.2 purification Process VOCs variation data at the outlet of each purification Unit
3.2.2.1 Concentration of VOCs
Fig. 16 is a graph showing the time-dependent changes of the concentrations of VOCs at the inlet and outlet of the ultraviolet device and at the outlet of the adsorption device during purification of high VOCs, wherein a is the concentration of VOCs at the outlet of the buffer tank, B is the concentration of VOCs at the outlet of the ultraviolet device, and C is the concentration of VOCs at the outlet of the adsorption device. 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 test 3 The combined decontamination efficiency during this period reached 98.3%.
The concentration of VOCs at the outlet of the adsorption zone is =55mg/m at about 1020s 3 (when the concentration value of VOCs is set to be 5% of the original concentration, the adsorbent penetrates), the adsorbent penetrates, and the combined purification efficiency is at least over 94.7% before penetration;
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) 3 At this time, the outlet concentration C5 of the ultraviolet device was 456mg/m 3 The molecular sieve and active carbon combined adsorbent is saturated and ineffective, and can not adsorb and purify VOCs, 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 CO 2 Change data
FIG. 17 shows CO at the inlet, outlet, and outlet of the ultraviolet apparatus during purification of high VOCs concentration 2 Concentration profile over time, where A is shown as CO at the outlet of the buffer tank 2 Concentration, B, is shown as CO at the outlet of the UV device 2 Concentration, C, as CO at the outlet of the gas outlet of the adsorption unit 2 And (4) concentration. As can be seen from FIG. 17, the inlet CO of the UV device 2 The concentration is integrally maintained at 882.5mg/m 3 Average level of (a), CO at the outlet of the ultraviolet device after reaching the maximum VOCs purification efficiency of UV 2 The concentration is basically maintained at a relatively stable level, namely 1531mg/m 3 The new generation rate of CO2 after UV purification is stabilized at about 73.6%.
CO at gas outlet of adsorption device 2 The concentration reached a maximum of 1748mg/m after 360s 3 And then maintained at a relatively constant level of 1679mg/m 3 I.e. CO purified in combination 2 The new generation rate is stabilized at about 90.3%.
Comparing the ultraviolet device with CO at the gas outlet of the adsorption device 2 The concentration and the new formation rate of (2) are shown in the figure, and the CO in the adsorption apparatus is shown 2 The concentration and the new generation rate are still greatly increased due to VOCs and O from the outlet of the ultraviolet device 3 、H 2 After 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 CO 2 And 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 experiment 3 H and 1105mg/m 3 Has a PM2.5 value of 17 μ g/m in VOCs gas 3 After the 7200s purification experiment, the PM2.5 value in the gas at the outlet of the adsorption device rises to 5580 mu g/m 3 PM2.5 increased nearly 300-fold.
To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention shall be covered by the claims of the present invention.
Claims (20)
1. An electric field device, comprising:
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.
2. the electric field device of claim 1, 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.
3. the electric field device according to claim 1 or 2, wherein 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 number of coupling times of the ionizing dust removing electric field is less than or equal to 3.
4. The electric field device of claim 1, wherein the electric field anode and the electric field cathode have a polar separation of less than 150mm.
5. The electric field device according to claim 4, wherein the electric field anode and the electric field cathode have a polar separation of 2.5-139.9mm.
6. The electric field device of claim 5, wherein the electric field anode and the electric field cathode have a polar separation of 5-100mm.
7. The electric field device according to any one of claims 4 to 6, wherein the distance between the poles of the electric field anode and the electric field cathode is such that the number of couplings of the ionizing dust-removing electric field is less than or equal to 3.
8. The electric field device according to claim 7, wherein the electric field cathode has a diameter of 1-3 mm, and the distance between the electric field anode and the electric field cathode is 2.5-139.9mm.
9. The electric field device of claim 1, wherein the electric field anode is 10-180mm in length.
10. The electric field device of claim 9, wherein the electric field anode has a length of 60-180mm.
11. The electric field device of claim 9 or 10, wherein the length of the electric field anode is such that the number of coupling times of the ionizing dust removing electric field is less than or equal to 3.
12. The electric field device of claim 1, wherein the electric field cathode has a length of 30-180mm.
13. The electric field device of claim 12, wherein the electric field cathode has a length of 54-176mm.
14. The electric field device of claim 12 or 13, wherein the length of the electric field cathode is such that the number of couplings of the ionizing dedusting electric field is less than or equal to 3.
15. The electric field device according to any one of claims 1 to 6, 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 removing electric field is less than or equal to 3.
16. 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 of any one of claims 1-15.
17. A gas treatment apparatus for VOCs as in claim 16, wherein said ultraviolet means comprises at least one ultraviolet lamp.
18. The apparatus of claim 16 or 17, further comprising an adsorption device positioned between the ultraviolet device and the electric field device.
19. A VOCs gas treatment plant as claimed in claim 18, wherein an adsorbent material is provided within the adsorbent device.
20. A VOCs gas treatment apparatus as claimed in claim 19, wherein the adsorbent material comprises at least one of activated carbon and molecular sieves.
Applications Claiming Priority (21)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019103404457 | 2019-04-25 | ||
| CN2019103404438 | 2019-04-25 | ||
| CN201910340445 | 2019-04-25 | ||
| CN201910340443 | 2019-04-25 | ||
| CN201910446294 | 2019-05-27 | ||
| CN2019104462943 | 2019-05-27 | ||
| CN201910452169 | 2019-05-28 | ||
| CN2019104521693 | 2019-05-28 | ||
| CN2019105217968 | 2019-06-17 | ||
| CN201910522488 | 2019-06-17 | ||
| CN201910521796 | 2019-06-17 | ||
| CN2019105224887 | 2019-06-17 | ||
| CN2019106051565 | 2019-07-05 | ||
| CN201910605156 | 2019-07-05 | ||
| CN201910636710 | 2019-07-15 | ||
| CN2019106367106 | 2019-07-15 | ||
| CN2020102966021 | 2020-04-15 | ||
| CN2020102957342 | 2020-04-15 | ||
| CN202010296602.1A CN113522023A (en) | 2020-04-15 | 2020-04-15 | System and method for treating VOCs gas in engine tail gas |
| CN202010295734.2A CN113521984A (en) | 2020-04-15 | 2020-04-15 | VOCs gas treatment device and method |
| PCT/CN2020/086865 WO2020216369A1 (en) | 2019-04-25 | 2020-04-24 | Voc gas treatment apparatus and method |
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| CN202090000499.5U Active CN218235209U (en) | 2019-04-25 | 2020-04-24 | Electric field device and VOCs gas treatment device |
| CN202080030898.0A Pending CN113727781A (en) | 2019-04-25 | 2020-04-24 | VOCs gas treatment device and method |
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| CN202080030940.9A Pending CN113747976A (en) | 2019-04-25 | 2020-04-24 | VOCs gas treatment device and method |
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