CN220276687U - VOCs processing apparatus of along face dielectric barrier discharge cooperation UV photocatalysis - Google Patents
VOCs processing apparatus of along face dielectric barrier discharge cooperation UV photocatalysis Download PDFInfo
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- CN220276687U CN220276687U CN202321794419.XU CN202321794419U CN220276687U CN 220276687 U CN220276687 U CN 220276687U CN 202321794419 U CN202321794419 U CN 202321794419U CN 220276687 U CN220276687 U CN 220276687U
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- 230000001699 photocatalysis Effects 0.000 title claims abstract description 32
- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 31
- 230000004888 barrier function Effects 0.000 title claims abstract description 20
- 238000007146 photocatalysis Methods 0.000 title claims abstract description 18
- 239000003054 catalyst Substances 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims description 73
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 34
- 239000007789 gas Substances 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 9
- 239000002826 coolant Substances 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 9
- 239000002245 particle Substances 0.000 abstract description 5
- 238000004891 communication Methods 0.000 abstract description 2
- 208000028659 discharge Diseases 0.000 description 41
- 239000002912 waste gas Substances 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- -1 oxygen ions Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
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- Physical Or Chemical Processes And Apparatus (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
The utility model relates to a VOCs treatment device combining surface dielectric barrier discharge with UV photocatalysis. The apparatus includes a creeping discharge reactor and a UV photocatalytic reactor, the creeping discharge reactor including a first housing having a first gas inlet and a first gas outlet. The UV photocatalytic reactor includes a second housing having a second air inlet and a second air outlet in communication with the first air outlet. At least two discharge modules are horizontally arranged in the first shell at intervals, and a gas channel is formed between any two adjacent discharge modules. At least one group of porous mesh plates are arranged in the second shell at intervals along the direction perpendicular to the air inlet direction, each group of porous mesh plates comprises two porous mesh plates arranged at intervals, a catalyst is attached to each porous mesh plate, and ultraviolet lamps are arranged between the two porous mesh plates of each group of porous mesh plates. The VOCs are treated by a large amount of free radicals and high-energy particles generated by the creeping discharge together with the photocatalysis, and compared with a single treatment method, the treatment efficiency is greatly improved.
Description
Technical Field
The utility model relates to the technical field of waste gas treatment, in particular to a VOCs treatment device combining along-plane dielectric barrier discharge with UV photocatalysis.
Background
VOCs sources are wide, components are complex, VOCs discharged into the atmosphere can directly harm an ecological system and human health, and a series of environmental problems such as haze, photochemical smog and the like can be indirectly induced to cause more serious influence.
Aiming at the terminal treatment of VOCs, the modern methods for treating VOCs mainly comprise an absorption method, a combustion method, a photocatalytic oxidation method, a dielectric barrier discharge method also called a plasma technology digestion method, a biotechnology method and the like. The principle of the dielectric barrier discharge treatment of VOCs is that particles rich in extremely high chemical activity, such as electrons, ions, ozone, excited molecules and the like, are generated in the dielectric barrier discharge process in low-temperature plasma waste gas treatment equipment. In addition, the principle of the photocatalytic oxidation treatment of VOCs is a treatment method which utilizes special ultraviolet wave bands to catalyze oxygen to generate ozone, hydroxyl free radicals and negative oxygen ions under the action of a catalyst and then oxidize and reduce VOCs molecules. But the actual UV photocatalytic treatment devices now in use are all relatively inefficient. The single use of dielectric barrier discharge or photocatalytic oxidation has the problem of low treatment efficiency.
Disclosure of Invention
The utility model aims to provide a VOCs treatment device combining along-surface dielectric barrier discharge with UV photocatalysis so as to solve the problem of low efficiency of VOCs treatment by a single technology in the prior art.
In order to achieve the above purpose, the VOCs treatment device adopting the following technical scheme is characterized in that the VOCs treatment device is cooperated with UV photocatalysis through surface dielectric barrier discharge: the VOCs treatment device comprises a creeping discharge reactor and a UV photocatalytic reactor, wherein the creeping discharge reactor comprises a first shell, the first shell is provided with a first air inlet and a first air outlet, the UV photocatalytic reactor comprises a second shell, the second shell is provided with a second air inlet and a second air outlet, and the second air inlet is connected and communicated with the first air outlet; at least two discharge modules are horizontally arranged in the first shell at intervals, and a gas channel is formed between any two adjacent discharge modules; at least one group of porous mesh plates are arranged in the second shell at intervals along the direction perpendicular to the air inlet direction, each group of porous mesh plates comprises two porous mesh plates arranged at intervals, a catalyst is attached to each porous mesh plate, and ultraviolet lamps are arranged between the two porous mesh plates of each group of porous mesh plates.
And a hydrogen peroxide liquid storage cavity is arranged between the second air inlet and the porous screen plate in the second shell, an ultrasonic atomizing head is arranged in the hydrogen peroxide liquid storage cavity, and atomized hydrogen peroxide is mixed with the air flow and enters the porous screen plate attached with the catalyst.
And a porous baffle plate is arranged between the hydrogen peroxide liquid storage cavity and the porous screen plate in the second shell and is used for uniformly distributing and dispersing the air flow into the rear porous screen plate.
The first air equalizing plate is arranged inside the first shell between the first air inlet and the discharge module, and the second air equalizing plate is arranged between the discharge module and the first air outlet.
And a cooling structure is arranged in each discharge module.
The discharging module comprises two high-voltage electrode plates which are arranged at intervals, a ground electrode plate is arranged between the two high-voltage electrode plates, and an insulating medium plate is arranged between the ground electrode plates of each high-voltage electrode plate; the cooling structure comprises a cooling plate arranged in the ground electrode plate, and a cooling channel is arranged on the cooling plate.
The cooling channels on each cooling plate comprise a plurality of sub-channels which are arranged in parallel at intervals, each cooling channel is provided with a cooling medium inlet and a cooling medium outlet, and the head and the tail of each two adjacent sub-channels are communicated so that an S-shaped cooling path is formed inside each cooling channel.
The cooling plate comprises a first sub cooling plate and a second sub cooling plate which are matched and welded together in a split mode, a first cooling groove is formed in the first sub cooling plate, a second cooling groove is formed in the second sub cooling plate, and the first cooling groove and the second cooling groove form the cooling channel when the first sub cooling plate and the second sub cooling plate are matched.
The utility model has the beneficial effects that: when gas passes through a gas channel between discharge modules in the surface discharge reactor, a large amount of high-energy particles and free radicals are released through surface discharge, and generated high-energy electrons can impact pollutant to cause rupture of chemical bonds so as to achieve preliminary decomposition of the pollutant. Then the waste gas enters a UV photocatalytic reactor, and the molecules of the waste gas react with high-energy particles and free radicals generated in the surface discharge reactor along with the irradiation of an ultraviolet lamp on a porous screen plate, so that the reaction efficiency is greatly improved due to the participation of a catalyst. Compared with a single processing device, the VOCs processing device with the structure has the advantage that the VOCs processing efficiency is greatly improved.
Further, the hydrogen peroxide solution is atomized into gas molecules which enter the UV photocatalytic reactor along with the gas flow, and the waste gas molecules react with free radicals and hydrogen peroxide molecules on the porous screen plate, so that the treatment efficiency is further improved.
Furthermore, the cooling structure can ensure that the creeping discharge reactor works in a proper temperature condition, can reduce the occurrence of ozone reverse reaction and ensures the efficiency and safety of long-time operation of the creeping discharge reactor.
Drawings
FIG. 1 is a schematic diagram of one embodiment of a device for treating VOCs along an area dielectric barrier discharge in conjunction with UV photocatalysis in accordance with the present utility model;
FIG. 2 is a schematic view of a discharge module in the creeping discharge reactor of FIG. 1;
fig. 3 is a schematic view of the structure of the cooling plate.
Detailed Description
An embodiment of a VOCs treatment device combining surface dielectric barrier discharge with UV photocatalysis of the utility model, as shown in figures 1-3, comprises a surface discharge reactor 1 and a UV photocatalysis reactor 2 which are sequentially arranged along the airflow direction. The creeping discharge reactor 1 comprises a first casing 3 with a first inlet opening 4 for the exhaust gas to be treated, and with a first outlet opening 5. At least two discharge modules 6 are arranged in the first shell at horizontal intervals, any two adjacent discharge modules are oppositely arranged to be matched with each other for use, the number of the discharge modules in the embodiment is 4, gas channels are formed between any two adjacent discharge modules, and each gas channel is parallel to the axis direction of the first shell. The first air equalizing plate 7 is arranged between the first air inlet and the discharge module in the first shell, and the second air equalizing plate 8 is arranged between the discharge module and the first air outlet.
In order to ensure that the creeping discharge reactor operates in a suitable temperature condition, a cooling structure is provided inside each discharge module in this embodiment. Specifically, as shown in fig. 2, description will be given by taking one of the discharge modules as an example: the discharge module comprises two high-voltage electrode plates 18 which are arranged at intervals, a ground electrode plate 19 is arranged between the two high-voltage electrode plates, the two high-voltage electrode plates share one ground electrode plate, and an insulating medium plate 20 is arranged between the two high-voltage electrode plates. The cooling structure comprises a cooling plate 21 arranged in the ground electrode plate, and a cooling channel 22 is arranged on the cooling plate and used for cooling the high-voltage electrode plates on two sides. The cooling channels on each cooling plate comprise a plurality of sub-channels arranged in parallel at intervals, the cooling channels are provided with a cooling medium inlet 23 and a cooling medium outlet 24, and the adjacent two sub-channels are communicated end to end so that an S-shaped cooling path is formed inside the cooling channels, as shown in fig. 3. The cooling plate comprises a first sub cooling plate and a second sub cooling plate which are matched and welded together in a split mode, a first cooling groove 25 is formed in the first sub cooling plate, a second cooling groove is formed in the second sub cooling plate, and the first cooling groove and the second cooling groove form the cooling channel when the first sub cooling plate and the second sub cooling plate are matched.
The UV photocatalytic reactor comprises a second housing 9 having a second gas inlet 10 and a second gas outlet 11, the second gas inlet 10 being in connected communication with the first gas outlet 5, i.e. the gas coming out of the first housing directly into the second housing. At least one group of porous mesh plates 12 are arranged in the second shell at intervals along the direction perpendicular to the air inlet direction, in this embodiment, the porous mesh plates are 4 groups, each group of porous mesh plates comprises two porous mesh plates arranged at intervals, and specifically, the porous mesh plates adopt porous alumina foam ceramics. The porous mesh plates are each adhered with a catalyst, which in this embodiment is commercially available TiO 2 Powder, in particular manganese-doped catalyst TiO 2 The spectrum of the catalyst is properly widened, the absorption capacity is enhanced, and the catalytic efficiency is enhanced. An ultraviolet lamp 13 is arranged between the two porous meshed plates of each group of porous meshed plates, and the ultraviolet lamp adopts a dual-band (185+253.7nm) or single-band (253.7 nm) high-energy ultraviolet lamp.
In order to improve the treatment efficiency of VOCs, a hydrogen peroxide liquid storage cavity 15 is arranged between the second air inlet and the porous screen plate in the second shell, a hydrogen peroxide solution 16 and an ultrasonic atomizing head 17 are arranged in the hydrogen peroxide liquid storage cavity, and atomized hydrogen peroxide is mixed with air flow and enters the porous screen plate attached with the catalyst. A porous baffle 14 is arranged between the hydrogen peroxide liquid storage cavity and the porous screen plate in the second shell and is used for uniformly distributing and dispersing the air flow into the rear porous screen plate. A third air equalizing plate is arranged between the porous screen plate and the second air outlet in the second shell. The hydrogen peroxide solution is atomized into fog drops with the diameter of 1-50 um, and the fog drops are driven by air flow to rapidly enter a post-catalytic reaction to participate in the degradation of VOCs.
When the device is used, gas to be treated firstly enters the first shell, a large amount of high-energy particles and free radicals are released through surface discharge, high-energy electrons generated when the gas passes through the device impact pollutants to cause the rupture of chemical bonds so as to achieve the preliminary decomposition of the pollutants, a large amount of free radicals enter the second shell along with the flowing of the polluted gas, hydrogen peroxide cooperates with the photocatalytic effect, an ultrasonic atomizing head atomizes a hydrogen peroxide solution into gas molecules, the gas molecules enter a Mn-TiO2 attached porous alumina plate along with the gas flow, and when the gas passes through a gap, the polluted gas molecules react with the free radicals and the hydrogen peroxide molecules on the alumina plate along with the irradiation of an ultraviolet lamp, and the reaction efficiency is greatly improved due to the participation of a catalyst.
In other embodiments of the present utility model, the number of discharge modules may be adjusted according to actual needs, but at least two discharge modules are guaranteed, so that the discharge modules need to be arranged in pairs; the number of the groups of the porous net plates can be adjusted according to actual needs; the cooling channels can also be formed by mutually communicating the middle parts of all the sub-channels; the cooling channels may also have a plurality of cooling medium inlets and a plurality of cooling medium outlets, in which case the cooling plate may also be a one-piece plate with a plurality of individual cooling channels.
Claims (8)
1. VOCs processing apparatus of following face dielectric barrier discharge cooperation UV photocatalysis, its characterized in that: the device comprises a creeping discharge reactor and a UV photocatalytic reactor, wherein the creeping discharge reactor comprises a first shell, the first shell is provided with a first air inlet and a first air outlet, the UV photocatalytic reactor comprises a second shell, the second shell is provided with a second air inlet and a second air outlet, and the second air inlet is communicated with the first air outlet in a connecting way; at least two discharge modules are horizontally arranged in the first shell at intervals, and a gas channel is formed between any two adjacent discharge modules; at least one group of porous mesh plates are arranged in the second shell at intervals along the direction perpendicular to the air inlet direction, each group of porous mesh plates comprises two porous mesh plates arranged at intervals, a catalyst is attached to each porous mesh plate, and ultraviolet lamps are arranged between the two porous mesh plates of each group of porous mesh plates.
2. The apparatus for treating VOCs along surface dielectric barrier discharge in conjunction with UV photocatalysis according to claim 1, wherein: and a hydrogen peroxide liquid storage cavity is arranged between the second air inlet and the porous screen plate in the second shell, an ultrasonic atomizing head is arranged in the hydrogen peroxide liquid storage cavity, and atomized hydrogen peroxide is mixed with the air flow and enters the porous screen plate attached with the catalyst.
3. The apparatus for treating VOCs along surface dielectric barrier discharge in conjunction with UV photocatalysis according to claim 2, wherein: and a porous baffle plate is arranged between the hydrogen peroxide liquid storage cavity and the porous screen plate in the second shell and is used for uniformly distributing and dispersing the air flow into the rear porous screen plate.
4. The apparatus for treating VOCs along surface dielectric barrier discharge in conjunction with UV photocatalysis according to claim 1, wherein: the first air equalizing plate is arranged inside the first shell between the first air inlet and the discharge module, and the second air equalizing plate is arranged between the discharge module and the first air outlet.
5. The apparatus for treating VOCs along surface dielectric barrier discharge in combination with UV photocatalysis according to any one of claims 1 to 4, wherein: and a cooling structure is arranged in each discharge module.
6. The apparatus for treating VOCs along surface dielectric barrier discharge in conjunction with UV photocatalysis according to claim 5, wherein: the discharging module comprises two high-voltage electrode plates which are arranged at intervals, a ground electrode plate is arranged between the two high-voltage electrode plates, and an insulating medium plate is arranged between the ground electrode plates of each high-voltage electrode plate; the cooling structure comprises a cooling plate arranged in the ground electrode plate, and a cooling channel is arranged on the cooling plate.
7. The apparatus for treating VOCs along surface dielectric barrier discharge in conjunction with UV photocatalysis according to claim 6, wherein: the cooling channels on each cooling plate comprise a plurality of sub-channels which are arranged in parallel at intervals, each cooling channel is provided with a cooling medium inlet and a cooling medium outlet, and the head and the tail of each two adjacent sub-channels are communicated so that an S-shaped cooling path is formed inside each cooling channel.
8. The apparatus for treating VOCs along surface dielectric barrier discharge in conjunction with UV photocatalysis according to claim 7, wherein: the cooling plate comprises a first sub cooling plate and a second sub cooling plate which are matched and welded together in a split mode, a first cooling groove is formed in the first sub cooling plate, a second cooling groove is formed in the second sub cooling plate, and the first cooling groove and the second cooling groove form the cooling channel when the first sub cooling plate and the second sub cooling plate are matched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321794419.XU CN220276687U (en) | 2023-07-10 | 2023-07-10 | VOCs processing apparatus of along face dielectric barrier discharge cooperation UV photocatalysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321794419.XU CN220276687U (en) | 2023-07-10 | 2023-07-10 | VOCs processing apparatus of along face dielectric barrier discharge cooperation UV photocatalysis |
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| Publication Number | Publication Date |
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| CN220276687U true CN220276687U (en) | 2024-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202321794419.XU Active CN220276687U (en) | 2023-07-10 | 2023-07-10 | VOCs processing apparatus of along face dielectric barrier discharge cooperation UV photocatalysis |
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| CN (1) | CN220276687U (en) |
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- 2023-07-10 CN CN202321794419.XU patent/CN220276687U/en active Active
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