CN114011239A - Low-concentration VOCs waste gas treatment system and process - Google Patents
Low-concentration VOCs waste gas treatment system and process Download PDFInfo
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- CN114011239A CN114011239A CN202111430634.7A CN202111430634A CN114011239A CN 114011239 A CN114011239 A CN 114011239A CN 202111430634 A CN202111430634 A CN 202111430634A CN 114011239 A CN114011239 A CN 114011239A
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- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 39
- 239000002912 waste gas Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000008569 process Effects 0.000 title claims abstract description 13
- 238000006303 photolysis reaction Methods 0.000 claims abstract description 72
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 61
- 230000015843 photosynthesis, light reaction Effects 0.000 claims abstract description 60
- 239000003054 catalyst Substances 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000006096 absorbing agent Substances 0.000 claims abstract description 15
- 239000010815 organic waste Substances 0.000 claims abstract description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 14
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 239000003595 mist Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 7
- 239000004408 titanium dioxide Substances 0.000 claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 238000000746 purification Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000001678 irradiating effect Effects 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
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- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 239000000428 dust Substances 0.000 description 5
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20707—Titanium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention is suitable for the field of organic waste gas treatment, and provides a low-concentration VOCs waste gas treatment system and a process, wherein the low-concentration VOCs waste gas treatment system comprises: the device comprises a cyclone plate tower, a circulating water tank, a UV photolysis purifier, an activated carbon absorber and an induced draft fan; the cyclone plate tower is connected with the circulating water tank through a water pipe; the cyclone plate tower is also connected with an active carbon absorber through a UV photolysis purifier, and the upper part of the active carbon absorber is provided with an induced draft fan; the UV photolysis purifier comprises a UV photolysis purifier shell, a catalyst plate is arranged at the bottom of the UV photolysis purifier shell, an ultraviolet searchlight is arranged in the UV photolysis purifier shell, and the ultraviolet searchlight is connected with a regulating component; the brush roll, the brush roll setting is in UV photodissociation clarifier shell, and brush roll one end passes through the joggle structure and connects the reciprocating plate, is provided with the guide slot that sets up along its length direction on the reciprocating plate, and the guide slot is connected with the power component who installs in UV photodissociation clarifier shell, realizes the cleanness to the catalyst board.
Description
Technical Field
The invention belongs to the field of organic waste gas treatment, and particularly relates to a low-concentration VOCs waste gas treatment system and process.
Background
VOCs gas refers to volatile organic compounds, and is generally classified into non-methane hydrocarbons, oxygen-containing organic compounds, halogenated hydrocarbons, nitrogen-containing organic compounds, sulfur-containing organic compounds, and the like. VOCs participate in the formation of ozone and secondary aerosols in the atmospheric environment, which have important effects on regional atmospheric ozone pollution and PM2.5 pollution. Most VOCs have unpleasant special odor and have toxic, irritant, teratogenic and carcinogenic effects, and particularly benzene, toluene, formaldehyde and the like cause great harm to human health. VOCs are important precursors causing urban dust haze and photochemical smog and mainly come from the processes of coal chemical industry, petrochemical industry, fuel coating manufacturing, solvent manufacturing and using and the like.
The current VOCs waste gas treatment technology mainly comprises a thermal destruction method, an adsorption method, a separation and purification technology, an adsorption method, a biological method, low-temperature plasma, an oxidation treatment method and the like, and the common equipment comprises a VOC treatment device, a VOC adsorption condensation recovery device, organic waste gas purification equipment, an organic waste gas VOC recovery device and the like.
The conventional VOCs waste gas treatment device has a UV photolysis step, wherein ozone is generated by mainly irradiating a catalyst with ultraviolet rays to treat VOCs waste gas, but in the treatment process, dust doped in the VOCs waste gas is easy to cover the catalyst, so that the catalytic reaction rate is reduced during the ultraviolet irradiation, and the treatment capacity is influenced.
Disclosure of Invention
The invention provides a low-concentration VOCs waste gas treatment system and a process, and aims to solve the problem that dust doped in VOCs waste gas easily covers a catalyst.
The invention is realized in this way, a low concentration VOCs waste gas treatment system, including:
the device comprises a cyclone plate tower, a circulating water tank, a UV photolysis purifier, an activated carbon absorber and an induced draft fan;
the cyclone plate tower is of a cylindrical cavity structure, a cyclone plate is rotatably arranged in the cyclone plate tower, and the cyclone plate tower is connected with the circulating water tank through a water pipe;
the cyclone plate tower is also connected with the activated carbon absorber through the UV photolysis purifier, and the induced draft fan is arranged at the upper part of the activated carbon absorber;
the UV photolysis purifier comprises a UV photolysis purifier shell, a detachable catalyst plate is arranged at the bottom of the UV photolysis purifier shell, an ultraviolet searchlight for irradiating the catalyst plate is arranged in the UV photolysis purifier shell, and the ultraviolet searchlight is connected with a regulating assembly arranged in the UV photolysis purifier shell;
the brush roll, the brush roll sets up in the UV photodissociation clarifier shell and with catalyst board rolls the laminating, just brush roll one end is through setting up meshing structure connection activity in the UV photodissociation clarifier shell sets up reciprocating plate in the UV photodissociation clarifier shell, be provided with the guide slot that sets up along its length direction on the reciprocating plate, the guide slot with install power component in the UV photodissociation clarifier shell is connected.
Furthermore, the adjusting assembly comprises a connecting rod which penetrates through the UV photolysis purifier shell and is rotatably arranged, a threaded sleeve which is rotatably connected with one end of the connecting rod, and a screw rod which is rotatably arranged on the UV photolysis purifier shell and is in threaded fit with the threaded sleeve;
the other end of the connecting rod is connected with the ultraviolet searchlight.
Furthermore, the meshing structure comprises a second gear installed at one end of the brush roller and a rack plate meshed with the second gear and fixedly installed on the inner wall of the UV photolysis purifier shell;
no. two gears with reciprocal board rotates to be connected, just fixed mounting has sliding sleeve on the reciprocal board, sliding sleeve slide set up with on the fixed horizontal pole of UV photodissociation clarifier shell lateral wall.
Furthermore, the other end of the brush roll is also provided with a guide assembly, and the guide assembly comprises a side plate rotationally connected with the brush roll and two guide rods fixedly arranged on the side wall of the UV photolysis purifier shell;
the side plates are arranged on the two guide rods in a sliding mode.
Furthermore, the power assembly comprises a first driving device fixedly mounted on the side wall of the UV photolysis purifier shell, two belt wheels rotatably mounted on the inner wall of the UV photolysis purifier shell, a transmission chain sleeved on the two belt wheels, and a pulley rotatably mounted on the transmission chain;
the pulley is matched with the guide groove;
one of the belt wheels is connected with an output shaft of the first driving device.
Furthermore, the activated carbon adsorber comprises an activated carbon adsorber shell, a baffle fixedly installed in the activated carbon adsorber shell, a second driving device fixedly installed on the baffle, and a stir-frying component connected with an output shaft of the second driving device and rotatably installed on the baffle.
Furthermore, the stir-frying assembly comprises a plurality of groups of rotating structures which are circumferentially and symmetrically arranged, each rotating structure comprises a rotating shaft which is rotatably arranged on the baffle, a stir-frying rod which is arranged on the rotating shaft, a first gear which is fixedly arranged on the stir-frying rod, and a gear ring which is circumferentially sleeved on the rotating shaft and is meshed with the first gear;
the ring gear with fix be connected the connecting piece in the activated carbon absorber casing, just the pivot is kept away from No. two drive arrangement's one end with the connecting piece rotates and is connected.
A process for treating a low concentration VOCs effluent treatment system as described, comprising the steps of:
firstly, organic waste gas is conveyed through a pipeline under the action of a draught fan and enters a cyclone plate tower from the bottom in a tangent line manner, when reaching a cyclone plate, a larger centrifugal force is generated due to the cutting action of a sufficient number of cyclone blades with inclination angles of degrees and is contacted with circulating liquid drops sprayed into a mist shape from top to bottom, gas and liquid are fully mixed, and residual oil mist particles in the gas are absorbed by circulating liquid and enter a circulating water tank along with water flow;
step two, the gas after passing through the cyclone plate tower enters a UV photolysis purifier, titanium dioxide is used as a catalyst, the titanium dioxide is in contact reaction with ultraviolet rays and air to generate ozone, the ozone is used for carrying out oxidative decomposition on organic matters, meanwhile, macromolecular organic matters are converted into micromolecular compounds or react under the action of the ultraviolet rays to generate water and carbon dioxide, and pollutants are removed;
and step three, because the UV photolysis purification efficiency is relatively low, in order to ensure that the waste gas can be stably discharged up to the standard, an activated carbon absorber is added for final close treatment to ensure that oil mist particles, total VOCs and the like stably reach the standard for a long time, and the gas is finally purified.
Compared with the prior art, the invention has the beneficial effects that:
because at the in-process of handling VOCs discarded, the dust of doping in VOCs waste gas covers the catalyst easily, lead to its catalytic reaction's speed to reduce, so we are through setting up a reciprocating motion's brush roll, realize the cleanness of going on to the catalyst board, guarantee the availability factor of catalyst, the effective area of shining of ultraviolet searchlight is adjusted to the accessible adjusting part simultaneously, make production ozone can just be used for with VOCs waste gas reaction, and the ozone that produces is too much, cause the influence to the ambient atmosphere.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic diagram of a three-dimensional structure provided by the present invention.
FIG. 2 is a schematic diagram of the structure within the housing of the UV photolysis purifier provided by the present invention.
Fig. 3 is an enlarged schematic view of the structure at a in fig. 2.
FIG. 4 is a schematic structural diagram of a housing of an activated carbon adsorber provided by the present invention.
Fig. 5 is a schematic view of a partial structure provided by the present invention.
FIG. 6 is a flow chart of the treatment process provided by the present invention.
Reference numerals:
the device comprises a 1-cyclone plate tower, a 2-circulating water tank, a 3-UV photolysis purifier shell, a 4-activated carbon adsorber shell, a 5-induced draft fan, a 6-ultraviolet searchlight, a 7-connecting rod, an 8-screw rod, a 9-threaded sleeve, a 10-first driving device, a 11-transmission chain, a 12-catalyst plate, a 13-pulley, a 14-reciprocating plate, a 15-guide groove, a 16-brush roller, a 17-cross rod, an 18-side plate, a 19-guide rod, a 20-baffle, a 21-second driving device, a 22-rotating shaft, a 23-connecting piece, a 24-toothed ring, a 25-stir-frying rod, a 26-first gear, a 27-second gear, a 28-rack plate and a 29-sliding sleeve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to effectively explain embodiments of the present invention, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1-6, the present invention provides a system and a process for treating waste gas containing low-concentration VOCs, so as to solve the problem that dust doped in the waste gas containing VOCs is easy to cover the catalyst.
The embodiment of the invention provides a low-concentration VOCs waste gas treatment system, which comprises: the device comprises a cyclone plate tower 1, a circulating water tank 2, a UV photolysis purifier, an active carbon adsorber and an induced draft fan 5;
the cyclone plate tower 1 is of a cylindrical cavity structure, a cyclone plate is rotatably arranged in the cyclone plate tower 1, and the cyclone plate tower 1 is connected with the circulating water tank 2 through a water pipe;
the cyclone plate tower 1 is also connected with the activated carbon absorber through the UV photolysis purifier, and the induced draft fan 5 is arranged at the upper part of the activated carbon absorber;
the UV photolysis purifier comprises a UV photolysis purifier shell 3, a detachable catalyst plate 12 is arranged at the bottom of the UV photolysis purifier shell 3, an ultraviolet searchlight 6 for irradiating the catalyst plate 12 is arranged in the UV photolysis purifier shell 3, and the ultraviolet searchlight 6 is connected with a regulating component arranged in the UV photolysis purifier shell 3;
the adjusting assembly comprises a connecting rod 7 which penetrates through the UV photolysis purifier shell 3 and is rotatably arranged, a threaded sleeve 9 which is rotatably connected with one end of the connecting rod 7, and a screw rod 8 which is rotatably arranged on the UV photolysis purifier shell 3 and is in threaded fit with the threaded sleeve 9;
the other end of the connecting rod 7 is connected with the ultraviolet searchlight 6.
Through rotating the lead screw 8, make the screw sleeve 9 with it screw-thread fit move in the axial direction of lead screw 8, and then make connecting rod 7 take place to deflect to drive ultraviolet searchlight 6 and take place to deflect, ultraviolet searchlight 6 transmission straight line light, along with the increase of its deflection angle, shine effective area on catalyst plate 12 also can increase thereupon, thereby the increase produces the speed of ozone.
Wherein the upper surface of the catalyst plate 12 is coated with titanium dioxide.
The brush roll 16 is arranged in the UV photolysis purifier housing 3 and is in rolling fit with the catalyst plate 12, one end of the brush roll 16 is connected with a reciprocating plate 14 movably arranged in the UV photolysis purifier housing 3 through a meshing structure arranged in the UV photolysis purifier housing 3, a guide groove 15 arranged along the length direction of the reciprocating plate 14 is formed in the reciprocating plate 14, and the guide groove 15 is connected with a power assembly arranged in the UV photolysis purifier housing 3;
the meshing structure comprises a second gear 27 arranged at one end of the brush roller 16 and a rack plate 28 which is meshed with the second gear 27 and fixedly arranged on the inner wall of the UV photolysis purifier shell 3;
the second gear 27 is rotatably connected with the reciprocating plate 14, a sliding sleeve 29 is fixedly mounted on the reciprocating plate 14, and the sliding sleeve 29 is slidably arranged on the cross rod 17 fixed on the side wall of the UV photolysis purifier housing 3;
the other end of the brush roll 16 is also provided with a guide assembly, and the guide assembly comprises a side plate 18 rotationally connected with the brush roll 16 and two guide rods 19 fixedly arranged on the side wall of the UV photolysis purifier shell 3;
the side plates 18 are slidably arranged on the two guide rods 19;
the power assembly comprises a first driving device 10 fixedly installed on the side wall of the UV photolysis purifier shell 3, two belt wheels rotatably installed on the inner wall of the UV photolysis purifier shell 3, a transmission chain 11 sleeved on the two belt wheels, and a pulley 13 rotatably installed on the transmission chain 11;
the pulley 13 is matched with the guide groove 15;
one of the pulleys is connected with the output shaft of the first driving device 10.
In use, the first driving device 10 is controlled to rotate to drive the transmission chain 11 to move, so that the pulley 13 mounted on the transmission chain 11 rotates and drives the reciprocating plate 14 to reciprocate in the UV photolysis purifier housing 3, and the second gear 27 rotates and drives the brush roller 16 to rotate under the action of the rack plate 28.
It should be noted that the diameter of the second gear 27 is controlled so that the linear velocity of the brush roller 16 on the catalyst plate 12 is greater than the linear velocity of the reciprocating plate 14 when the reciprocating plate 14 moves.
The activated carbon adsorber comprises an activated carbon adsorber shell 4, a baffle plate 20 fixedly installed in the activated carbon adsorber shell 4, a second driving device 21 fixedly installed on the baffle plate 20, and a stir-frying component connected with an output shaft of the second driving device 21 and rotatably installed on the baffle plate 20;
the stir-frying assembly comprises a plurality of groups of rotating structures which are circumferentially and symmetrically arranged, and each rotating structure comprises a rotating shaft 22 which is rotatably arranged on the baffle plate 20, a stir-frying rod 25 which is arranged on the rotating shaft 22, a first gear 26 which is fixedly arranged on the stir-frying rod 25, and a toothed ring 24 which is circumferentially sleeved on the rotating shaft 22 and is meshed with the first gear 26;
the toothed ring 24 is connected with a connecting piece 23 fixed in the activated carbon adsorber shell 4, and one end of the rotating shaft 22 far away from the second driving device 21 is rotationally connected with the connecting piece 23.
The baffle 20 is provided with a plurality of through holes, and the aperture of the through holes is smaller than the diameter of the activated carbon particles.
When the second driving device 21 rotates, the stir-frying rod 25 is driven to do circular motion, and in the process of stirring, the first gear 26 rotates under the action of the toothed ring 24 and drives the stir-frying rod 25 to rotate, so that the activated carbon in the activated carbon adsorber shell 4 is stir-fried, and the absorption efficiency is improved.
In the embodiment of the invention, the invention also provides a low-concentration VOCs waste gas treatment process, which comprises the following steps:
firstly, organic waste gas is conveyed through a pipeline under the action of an induced draft fan 5 and enters a cyclone plate tower 1 from the bottom in a tangent line manner, when reaching a cyclone plate, a larger centrifugal force is generated due to the cutting action of a sufficient number of cyclone blades with 25-degree inclination angles and is contacted with circulating liquid drops sprayed into a mist shape from top to bottom, gas and liquid are fully mixed, and residual oil mist particles in the gas are absorbed by the circulating liquid and enter a circulating water tank 2 along with water flow;
step two, the gas passing through the cyclone plate tower 1 enters a UV photolysis purifier, titanium dioxide is used as a catalyst, the titanium dioxide is in contact reaction with ultraviolet rays and air to generate ozone, the ozone is used for carrying out oxidative decomposition on organic matters, meanwhile, macromolecular organic matters are converted into micromolecular compounds or react under the action of the ultraviolet rays to generate water and carbon dioxide, and pollutants are removed;
and step three, because the UV photolysis purification efficiency is relatively low, in order to ensure that the waste gas can be stably discharged up to the standard, an activated carbon absorber is added for final close treatment to ensure that oil mist particles, total VOCs and the like stably reach the standard for a long time, and the gas is finally purified.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. An exhaust treatment system for low concentration VOCs, comprising:
the device comprises a cyclone plate tower (1), a circulating water tank (2), a UV photolysis purifier, an activated carbon absorber and an induced draft fan (5);
the cyclone plate tower (1) is of a cylindrical cavity structure, a cyclone plate is rotatably arranged in the cyclone plate tower, and the cyclone plate tower (1) is connected with the circulating water tank (2) through a water pipe;
the cyclone plate tower (1) is also connected with the activated carbon absorber through the UV photolysis purifier, and the upper part of the activated carbon absorber is provided with the induced draft fan (5);
the UV photolysis purifier comprises a UV photolysis purifier shell (3), a detachable catalyst plate (12) is arranged at the bottom of the UV photolysis purifier shell (3), an ultraviolet searchlight (6) used for irradiating the catalyst plate (12) is arranged in the UV photolysis purifier shell (3), and the ultraviolet searchlight (6) is connected with an adjusting component arranged in the UV photolysis purifier shell (3);
brush roll (16), brush roll (16) set up in UV photodissociation clarifier shell (3) and with catalyst board (12) roll laminating, just brush roll (16) one end is through setting up meshing structural connection activity in UV photodissociation clarifier shell (3) sets up reciprocating plate (14) in UV photodissociation clarifier shell (3), be provided with guide slot (15) that set up along its length direction on reciprocating plate (14), guide slot (15) with install power component in UV photodissociation clarifier shell (3) is connected.
2. The exhaust treatment system for low concentration VOCs according to claim 1, wherein the adjustment assembly comprises a connecting rod (7) rotatably disposed through the UV photolysis purifier housing (3), a threaded sleeve (9) rotatably connected to one end of the connecting rod (7), and a screw (8) rotatably mounted on the UV photolysis purifier housing (3) and threadedly engaged with the threaded sleeve (9);
the other end of the connecting rod (7) is connected with the ultraviolet searchlight (6).
3. The exhaust gas treatment system for low concentration of VOCs as claimed in claim 1, wherein said engaging structure comprises a second gear (27) installed at one end of said brush roller (16), a rack plate (28) engaged with said second gear (27) and fixedly installed on an inner wall of said UV photolysis purifier housing (3);
no. two gear (27) with reciprocating plate (14) rotate to be connected, just fixed mounting has sliding sleeve (29) on reciprocating plate (14), sliding sleeve (29) slide set up with on horizontal pole (17) that UV photodissociation clarifier shell (3) lateral wall is fixed.
4. The system for treating waste gas containing low concentration of VOCs according to claim 1, wherein the other end of the brush roller (16) is further provided with a guide assembly, the guide assembly comprises a side plate (18) rotatably connected with the brush roller (16), and two guide rods (19) fixedly mounted on the side wall of the UV photolysis purifier housing (3);
the side plates (18) are arranged on the two guide rods (19) in a sliding mode.
5. The exhaust gas treatment system for low concentration VOCs according to claim 1, wherein the power assembly comprises a first driving device (10) fixedly installed on the side wall of the UV photolysis purifier housing (3), two pulleys rotatably installed on the inner wall of the UV photolysis purifier housing (3), a transmission chain (11) sleeved on the two pulleys, and a pulley (13) rotatably installed on the transmission chain (11);
the pulley (13) is matched with the guide groove (15);
one of the belt wheels is connected with an output shaft of the first driving device (10).
6. The exhaust gas treatment system for low concentration VOCs according to claim 1, wherein the activated carbon adsorber comprises an activated carbon adsorber housing (4), a baffle plate (20) fixedly installed in the activated carbon adsorber housing (4), a second driving device (21) fixedly installed on the baffle plate (20), and a stir-frying assembly connected with an output shaft of the second driving device (21) and rotatably installed on the baffle plate (20).
7. The system for treating waste gas containing low-concentration VOCs of claim 6, wherein the stir-frying assembly comprises a plurality of sets of rotating structures which are circumferentially symmetrically arranged, and each rotating structure comprises a rotating shaft (22) rotatably mounted on the baffle (20), a stir-frying rod (25) arranged on the rotating shaft (22), a first gear (26) fixedly mounted on the stir-frying rod (25), and a gear ring (24) which is circumferentially sleeved on the rotating shaft (22) and is meshed with the first gear (26);
the toothed ring (24) is connected with a connecting piece (23) fixed in the activated carbon adsorber shell (4), and one end of the rotating shaft (22) far away from the second driving device (21) is rotationally connected with the connecting piece (23).
8. A process for treating a low concentration of VOCs in an exhaust gas treatment system as recited in any one of claims 1-7, comprising the steps of:
firstly, organic waste gas is conveyed through a pipeline under the action of a draught fan (5) and enters a cyclone plate tower (1) from the bottom in a tangent line manner, when reaching a cyclone plate, a larger centrifugal force is generated due to the cutting action of enough cyclone blades with 25-degree inclination angles and is contacted with circulating liquid drops sprayed into a mist shape from top to bottom, gas and liquid are fully mixed, and residual oil mist particles in the gas are absorbed by the circulating liquid and enter a circulating water tank (2) along with water flow;
step two, the gas passing through the cyclone plate tower (1) enters a UV photolysis purifier, titanium dioxide is used as a catalyst, the titanium dioxide is in contact reaction with ultraviolet rays and air to generate ozone, the ozone is used for carrying out oxidative decomposition on organic matters, meanwhile, macromolecular organic matters are converted into micromolecular compounds or react under the action of the ultraviolet rays to generate water and carbon dioxide, and pollutants are removed;
and step three, because the UV photolysis purification efficiency is relatively low, in order to ensure that the waste gas can be stably discharged up to the standard, an activated carbon absorber is added for final close treatment, so that the oil mist particles, total VOCs and the like can be stably discharged up to the standard for a long time, and the gas is finally purified.
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| CN202111430634.7A CN114011239A (en) | 2021-11-29 | 2021-11-29 | Low-concentration VOCs waste gas treatment system and process |
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