CN111167280B - Multi-stage dielectric barrier discharge plasma synergistic catalytic treatment device for waste gas and wastewater - Google Patents
Multi-stage dielectric barrier discharge plasma synergistic catalytic treatment device for waste gas and wastewater Download PDFInfo
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- CN111167280B CN111167280B CN201911267561.7A CN201911267561A CN111167280B CN 111167280 B CN111167280 B CN 111167280B CN 201911267561 A CN201911267561 A CN 201911267561A CN 111167280 B CN111167280 B CN 111167280B
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- 239000002351 wastewater Substances 0.000 title claims abstract description 34
- 239000002912 waste gas Substances 0.000 title claims abstract description 28
- 230000004888 barrier function Effects 0.000 title claims abstract description 24
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 8
- 230000002195 synergetic effect Effects 0.000 title claims description 14
- 239000003054 catalyst Substances 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 239000003463 adsorbent Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 16
- 238000006555 catalytic reaction Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000004065 wastewater treatment Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910001182 Mo alloy Inorganic materials 0.000 claims description 3
- 229910001080 W alloy Inorganic materials 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- MGRWKWACZDFZJT-UHFFFAOYSA-N molybdenum tungsten Chemical compound [Mo].[W] MGRWKWACZDFZJT-UHFFFAOYSA-N 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
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- 239000005341 toughened glass Substances 0.000 claims description 3
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- 229910052721 tungsten Inorganic materials 0.000 claims description 3
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- 239000003344 environmental pollutant Substances 0.000 abstract description 6
- 231100000719 pollutant Toxicity 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 15
- 238000000746 purification Methods 0.000 description 5
- 239000010815 organic waste Substances 0.000 description 4
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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
- B01D53/32—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 electrical effects other than those provided for in group B01D61/00
-
- 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
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
本发明公开了多级式介质阻挡放电等离子体协同催化处理废气废水装置，包括壳体，在壳体内沿进料端到出料端依次交替设置有等离子体发生器和由多孔塔板支撑的催化剂或吸附剂，每个等离子体发生器包括垂直于物料流动方向的一根包裹放电介质层的高压电极和数根阻挡介质管，在每个阻挡介质管中均设置有低压电极，阻挡介质管以高压电极为中心均匀排布，高压电极连接左侧的高压放电装置，低压电极右侧接地，多孔塔板支撑的催化剂或吸附剂可由壳体上的具有密封圈的数个密封门装入。本发明结构简单、设计合理，既能够对废气进行处理，又可以对废水进行净化，且能够减少二次污染物的存在。
The invention discloses a multi-stage dielectric barrier discharge plasma coordinated catalytic treatment device for waste gas and wastewater, comprising a shell, in which plasma generators and catalysts or adsorbents supported by porous tower plates are alternately arranged in sequence from the feed end to the discharge end, each plasma generator comprises a high-voltage electrode wrapped with a discharge dielectric layer and several barrier dielectric tubes perpendicular to the material flow direction, a low-voltage electrode is arranged in each barrier dielectric tube, the barrier dielectric tubes are evenly arranged with the high-voltage electrode as the center, the high-voltage electrode is connected to the high-voltage discharge device on the left, the low-voltage electrode is grounded on the right, and the catalyst or adsorbent supported by the porous tower plate can be loaded through several sealing doors with sealing rings on the shell. The invention has a simple structure and a reasonable design, can not only treat waste gas, but also purify wastewater, and can reduce the presence of secondary pollutants.
Description
Technical Field
The invention relates to an exhaust gas and wastewater treatment device, in particular to a device for treating exhaust gas and wastewater by multistage dielectric barrier discharge plasma synergistic catalysis.
Background
With the development of technology, petrochemical and organic synthesis technologies are continuously advanced, so that a plurality of chemical products are increasingly becoming necessities for people to live. On the one hand, the products bring convenience to our life, and on the other hand, waste gas and waste water are generated in the production and use processes, so that certain harm is caused to human bodies. For example, VOCs mainly affect the central nervous system and hematopoietic system of the human body, especially have toxic effects on the immune system and various organs, benzene series have the greatest health hazard to the human body, have strong blood toxicity and carcinogenicity, formaldehyde is the main corner of indoor air pollution, and can cause damage to respiratory system, digestive system, blood system, central nervous system, immune system, kidney and liver.
In addition, water resources are substances which people and all organisms depend on to survive, along with the increase of population and the acceleration of industrialization and urban treatment, the shortage of water resources becomes an important problem facing the world, and meanwhile, the increase of sewage discharge amount increases the severity of the problem. It is therefore important to develop efficient, energy-saving, pollution-free technologies for treating exhaust gases and waste water.
The existing plasma treatment device for waste gas and waste water is mostly subjected to single treatment, and does not meet the current situation that waste gas and waste water are generated simultaneously in the actual production process. The CN 208694648U discloses a low-temperature plasma waste gas treatment generator, and the equipment has simple process and convenient operation and can be carried out under the atmospheric pressure, but the service life of a plasma product is too short, and the sufficient purification of pollutants is difficult to realize. The CN 208553754U discloses a device for treating organic waste gas by plasma collaborative adsorption catalysis, which can efficiently treat the organic waste gas, but only treat the waste gas, can not treat waste water, and often produces waste gas and waste water simultaneously in real life. The CN104437021A designs a plasma waste gas treatment device with an electrode module capable of being quickly disassembled, and the designed electrode is detachable and easy to clean, but the electrode is poorly fixed, so that uniform discharge of the electrode is not facilitated. The CN105858988A discloses a method and a device for treating wastewater by using a plasma synergistic catalyst, and the device is used for introducing the wastewater into a reaction kettle provided with positive and negative electrodes, so that the treatment capacity is small, and the wastewater is not beneficial to the mass treatment. The utility model discloses a general purification device for waste gas and wastewater, which is designed in CN108261897A, and the device directly sprays a gas-liquid mixture into a reaction cavity through an atomization nozzle, so that the residence time of the wastewater in a container is short and the purification is insufficient due to the influence of gravity, and meanwhile, when the waste gas is treated, if ozone generated by plasma is not completely consumed, secondary pollution is caused to the gas.
Disclosure of Invention
In order to solve the problems, the invention provides a multistage dielectric barrier discharge plasma collaborative catalytic waste gas and wastewater treatment device which can treat organic waste gas, purify wastewater, realize plasma collaborative catalyst treatment and effectively improve the waste gas and wastewater treatment effect.
In order to achieve the above object, the present invention is realized by the following technical scheme:
The invention relates to a device for treating waste gas and waste water by multistage dielectric barrier discharge plasma synergistic catalysis, which comprises a shell, wherein a plasma generator and a catalyst or adsorbent supported by a porous tower plate are sequentially and alternately arranged in the shell from a feed end to a discharge end, each plasma generator comprises a high-voltage electrode which is vertical to the material flowing direction and wraps a discharge dielectric layer, a plurality of barrier dielectric tubes are arranged in each barrier dielectric tube, low-voltage electrodes are uniformly distributed in the barrier dielectric tubes by taking the high-voltage electrodes as centers, the high-voltage electrodes are connected with a left high-voltage discharge device, the right side of each high-voltage electrode is grounded, and the catalyst or adsorbent supported by the porous tower plate can be loaded by a plurality of sealing doors with sealing rings on the shell.
The invention further improves that the high-voltage electrode is made of one of copper, tungsten, copper-tungsten alloy and tungsten-molybdenum alloy, and has one of a tubular shape, a stick shape, a needle shape and a spiral shape.
The invention further improves that the discharge medium layer and the shell which are wrapped on the outer side of the high-voltage electrode are made of one of quartz glass, toughened glass, ceramic, polytetrafluoroethylene and epoxy resin.
The invention is further improved in that the thickness of the discharge medium layer is 0.2-1 cm.
A further improvement of the invention is that the cross-sectional area of the housing is 100 cm 2-5000 cm2 and the thickness is 1-5: 5 cm.
The invention is further improved in that the feeding end is provided with an air inlet and a liquid inlet, and the discharging end is provided with a discharging hole shared by gas and liquid.
The invention is further improved in that an atomizing nozzle is arranged at the lower end of the liquid inlet.
A further improvement of the invention is that the thickness of the catalyst supported by the porous tower plates is 1-10 cm, and the distance between two adjacent porous tower plates is 10-50 cm.
The invention further improves that the power supply of the high-voltage discharge device is one of pulse, high-frequency or radio-frequency power supply, and the voltage is 0-500v.
A further improvement of the invention is that the distance between the high voltage electrode and the low voltage electrode is 1-8cm.
The invention has the beneficial effects that organic waste gas enters the shell from the air inlet 3, or the waste water sprays the water-vapor mixture into the reaction chamber in the shell through the atomizing nozzle, the dielectric barrier discharge device in the chamber is excited to generate high-energy active particles and ozone to oxidize and decompose organic matters in the waste gas or the waste water, in addition, the plasma synergistic catalyst can further strengthen the decomposition of the organic matters, the porous tower plate can increase the material retention time, and the uniform distribution of the waste gas or the waste water in the reactor is facilitated, so that the waste gas and the waste water are purified more fully. The catalyst or the adsorbent is placed at the lower end of the discharge area, and can selectively react with intermediate byproducts generated by the plasma, so that ideal degradation substances are obtained, secondary pollutants are reduced, the catalyst is easy to replace, a plurality of different catalysts can be used for synergetic catalysis, and the treatment capacity of equipment on difficult degradation substances is improved.
The invention has simple structure and reasonable design, can treat waste gas and purify waste water, and can reduce the existence of secondary pollutants.
Drawings
Fig. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a schematic structural view of a plasma generator.
Fig. 3 is a schematic side view of a plasma generator.
Fig. 4 is a schematic view of a sealing door.
The high-voltage discharge device comprises a 1-high-voltage discharge device, a 2-high-voltage electrode, a 3-air inlet, a 4-liquid inlet, a 5-shell, a 6-atomizing nozzle, a 7-plasma generator, an 8-low-voltage electrode, a 9-catalyst, a 10-porous tower plate, an 11-air outlet, a 12-liquid outlet, a 13-blocking medium pipe, a 14-discharge medium layer, a 15-sealing ring and a 16-sealing door.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples. The drawings illustrate a preferred embodiment of the invention in various forms, and therefore the scope of protection is not limited to the description of the embodiments, but is exemplified for a better understanding of the implementation of the invention.
As shown in fig. 1-4, the invention is a device for treating waste gas and waste water by multistage dielectric barrier discharge plasma synergistic catalysis, comprising a shell 5, a plasma generator 7 and a catalyst 9 or an adsorbent supported by a porous tray 10 are alternately arranged in the shell 5 from a feed end to a discharge end in sequence, the catalyst 9 or the adsorbent is placed at the rear side of the plasma generator, the possibility of secondary pollutants can be effectively reduced, each plasma generator 7 comprises a high-voltage electrode 2 which is vertical to the material flow direction and wraps a discharge dielectric layer 14, a plurality of barrier dielectric tubes 13, the number of the barrier dielectric tubes 13 is 6, each blocking medium tube 13 is provided with a low-voltage electrode 8, the distance between the high-voltage electrode 2 and the low-voltage electrode 8 is 1-8cm, the distance ensures the uniformity of discharge, the preferred distance is 3.5 cm, the blocking medium tubes 13 are uniformly distributed by taking the high-voltage electrode 2 as a center, the high-voltage electrode 2 is connected with the left high-voltage discharge device 1, the power supply of the high-voltage discharge device 1 is one of pulse, high-frequency or radio-frequency power supply, the voltage is 0-500V, the power supply of the preferred high-voltage discharge device 1 adopts a 220V pulse power supply, the right side of the low-voltage electrode 8 is grounded, and a catalyst 9 or an adsorbent supported by a porous tray 10 can be loaded by a plurality of sealing doors 16 with sealing rings 15 on a shell 5. Replacement and loading of the catalyst 9 is facilitated by the sealing door 16.
The high-voltage electrode 2 is made of one of copper, tungsten, copper-tungsten alloy and tungsten-molybdenum alloy, and has a tubular shape, a stick shape, a needle shape and a spiral shape. The thickness of the discharge medium layer 14 wrapped on the outer side of the high-voltage electrode 2 is 0.2-1 cm, and the preferred thickness is 0.3-cm, and the discharge medium layer 14 can effectively protect the high-voltage electrode 2. The discharge medium layer and the shell 5 which are wrapped on the outer side of the high-voltage electrode 2 are made of one of quartz glass, toughened glass, ceramic, polytetrafluoroethylene and epoxy resin. The cross-sectional area of the housing 5 is 100 cm 2-5000 cm2 and its thickness is 1-5 a cm a. Preferably, the quartz glass housing having a cross-sectional area of 400 cm 2 of the housing 5 has a thickness of 1: 1 cm of the housing 5. The catalyst supported by the perforated tray 10 can be loaded through a sealing door 16 to facilitate catalyst replacement. The presence of the perforated tray 10 facilitates the redistribution of the gas and liquid within the reactor, thus making the purification treatment of the waste water and liquid more uniform. The perforated trays 10 support catalyst having a thickness of 1 to 10 cm a and a distance between two adjacent perforated trays 10 of 10 to 50 a cm a, preferably the perforated trays 10 support catalyst having a thickness of 3 a cm a and a spacing between the perforated trays 10 of 15 a cm a. Perforated tray 10 facilitates the redistribution of the exhaust gas or waste water within housing 5, thereby allowing for purification treatment Geng Junyun of the waste water and exhaust gas.
The feeding end is provided with an air inlet 3 and a liquid inlet 4, the discharging end is provided with an air outlet 11 and a liquid outlet 12, the air outlet 11 and the liquid outlet 12 are led out from the same outlet on the shell 5, and the lower end of the liquid inlet 4 is provided with an atomizing nozzle 6. When exhaust gas enters the shell 5 from the air inlet 3 or the water vapor mixture is sprayed into the shell 5 through the atomization nozzle 6, the plasma generator 7 is excited to generate high-energy active particles and ozone to carry out oxidative decomposition on organic matters in the exhaust gas or the wastewater, and in addition, the plasma synergistic catalyst 9 can further strengthen the decomposition of the organic matters and finally reach the emission standard. The catalyst 9 can be supported by the porous tower plates 10, so that the gas or liquid entering the shell 5 can be redistributed, and further the waste gas or waste water can be purified more fully.
The invention has simple structure and reasonable design, can treat waste gas and purify waste water, and can reduce the existence of secondary pollutants.
Claims (5)
1. The multistage dielectric barrier discharge plasma synergistic catalytic waste gas and waste water treatment device comprises a shell (5) and is characterized in that a plasma generator (7) and a catalyst (9) or an adsorbent supported by a porous tray (10) are sequentially and alternately arranged in the shell (5) from a feeding end to a discharging end, each plasma generator (7) comprises a high-voltage electrode (2) and a plurality of barrier medium pipes (13) which are perpendicular to the material flowing direction and wrap a discharge medium layer (14), each barrier medium pipe (13) is internally provided with a low-voltage electrode (8), the barrier medium pipes (13) are uniformly distributed by taking the high-voltage electrode (2) as a center, the high-voltage electrode (2) is connected with a left-side high-voltage discharge device (1), the right side of the low-voltage electrode (8) is grounded, the catalyst (9) or the adsorbent supported by the porous tray (10) can be filled with a plurality of sealing doors (16) with sealing rings (15) on the shell (5), the thickness of the medium layers (14) is equal to that of the medium layers (2-570.25) and the liquid inlet (4) is arranged at the discharging end, the liquid inlet (4) is provided with a liquid outlet (4) at the feeding end and the discharging end (4), the thickness of the catalyst supported by the porous tower plate (10) is 1-10 cm, the distance between two adjacent porous tower plates (10) is 10-50 cm, and the distance between the high-voltage electrode (2) and the high-voltage electrode (8) is 1-8cm.
2. The device for the synergistic catalytic treatment of waste gas and wastewater by using the multistage dielectric barrier discharge plasma according to claim 1, wherein the high-voltage electrode (2) is made of one of copper, tungsten, copper-tungsten alloy and tungsten-molybdenum alloy, and is tubular, rod-shaped, needle-shaped and spiral.
3. The device for treating waste gas and waste water by the multistage dielectric barrier discharge plasma synergistic catalysis according to claim 2 is characterized in that the discharge dielectric layer wrapped on the outer side of the high-voltage electrode (2) and the shell are made of one of quartz glass, toughened glass, ceramic, polytetrafluoroethylene and epoxy resin.
4. The device for the synergistic catalytic treatment of waste gas and wastewater by using the multistage dielectric barrier discharge plasma according to claim 3, wherein the cross section area of the shell is 100 cm 2-5000 cm2, and the thickness of the shell is 1-5 cm.
5. The device for the synergistic catalytic treatment of waste gas and waste water by using the multistage dielectric barrier discharge plasma according to claim 1, wherein the power supply of the high-voltage discharge device (1) is one of a pulse power supply, a high-frequency power supply and a radio-frequency power supply, and the voltage is 0-500v.
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| CN111871168A (en) * | 2020-08-27 | 2020-11-03 | 重庆三颗草科技有限公司 | A device for treating organic waste gas with low temperature plasma and activated carbon |
| CN114772819B (en) * | 2022-05-23 | 2023-12-19 | 常州大学 | Device and method for treating wastewater by combining dielectric barrier discharge and chemical catalysis |
| CN117323796A (en) * | 2023-10-07 | 2024-01-02 | 苏州科技大学 | Industrial waste gas purifying device and method |
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| CN211537193U (en) * | 2019-12-11 | 2020-09-22 | 苏州爱特维电子科技有限公司 | Multi-stage dielectric barrier discharge plasma concerted catalysis waste gas and wastewater treatment device |
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| CN105920985B (en) * | 2016-06-17 | 2019-03-01 | 西安交通大学 | A device for treating waste gas based on dielectric barrier discharge plasma |
| CN107721034A (en) * | 2017-10-20 | 2018-02-23 | 复旦大学 | A kind of wastewater treatment equipment of low temperature plasma combined catalyst and adsorbent |
| CN209576241U (en) * | 2018-12-13 | 2019-11-05 | 浙江省环境保护科学设计研究院 | Device for treating organic waste gas with double dielectric barrier discharge plasma excitation catalytic gas phase reaction |
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