CN111659232B - A VOCs waste gas treatment system - Google Patents

A VOCs waste gas treatment system Download PDF

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CN111659232B
CN111659232B CN202010520808.8A CN202010520808A CN111659232B CN 111659232 B CN111659232 B CN 111659232B CN 202010520808 A CN202010520808 A CN 202010520808A CN 111659232 B CN111659232 B CN 111659232B
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vocs
waste gas
plasma generating
gas
treatment system
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CN111659232A (en
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卞忠华
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Jiangsu Chunshentang Biotechnology Co ltd
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Jiangsu Chunshentang Biotechnology Co ltd
Jiangsu Chunshentang Pharmaceutical Co ltd
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    • B01D53/14—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 absorption
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    • B01D—SEPARATION
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D53/14—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 absorption
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    • B01D53/14—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 absorption
    • B01D53/1487—Removing organic compounds
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    • 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
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    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
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    • B01D—SEPARATION
    • B01D2256/00—Main component in the product gas stream after treatment
    • B01D2256/22—Carbon dioxide
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    • 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
    • B01D2257/702—Hydrocarbons
    • B01D2257/7027—Aromatic hydrocarbons
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    • 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
    • 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
    • B01D2259/818—Employing electrical discharges or the generation of a plasma

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Abstract

本发明公开了一种VOCs废气处理系统，其包括依次连接联通的水幕喷淋塔、雾化喷淋塔、气液分离器、等离子体发生装置和红外加热装置；本发明实现了VOCs废气的去除率最高可达到90%以上，解决现有废气治理技术难以达到不断提高的排放标准要求，消除了VOCs废气对环境的排放污染；整个处理过程简单易操作、处理效率高、所需设备少，设备能耗低，很好的满足了现代企业对节能减排、提高生产效益的要求，对节约资源减少成本具有重大意义。

Figure 202010520808

The invention discloses a VOCs waste gas treatment system, which comprises a water curtain spray tower, an atomization spray tower, a gas-liquid separator, a plasma generating device and an infrared heating device which are connected in sequence; The highest removal rate can reach more than 90%, which solves the problem that the existing waste gas treatment technology is difficult to meet the requirements of continuously improving emission standards, and eliminates the emission pollution of VOCs waste gas to the environment; the entire treatment process is simple and easy to operate, with high treatment efficiency and less equipment required. The equipment has low energy consumption, which well meets the requirements of modern enterprises for energy conservation and emission reduction, and improves production efficiency, which is of great significance for saving resources and reducing costs.

Figure 202010520808

Description

VOCs exhaust-gas treatment system
The invention is a divisional application of Chinese patent application with application date of 2017, 6 and 21, application number of 2017104779475 and name of VOCs waste gas treatment method.
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to a VOCs waste gas treatment system.
Background
In recent years, more serious air pollution events occur nationwide, which leads people to pay more and more attention to air quality, and meanwhile, various levels of governments and environmental protection departments develop a plurality of special policies aiming at the phenomenon, so that the waste gas treatment industry is developed vigorously. In the VOCs (volatile organic compounds) waste gas treatment industry, the activated carbon adsorption method with low technical content and high operation cost is adopted in the early stage and is developed slowly. After environmental protection standards are raised in various places, VOCs are required to be treated by enterprises which discharge VOCs but do not treat or do not reach the standard after treatment.
The existing VOCs waste gas treatment technology mainly comprises an adsorption method (spraying and activated carbon adsorption), a recovery method (condensation and spraying) and a direct removal method (low-temperature plasma, photocatalytic oxidation and concentrated combustion). Combustion methods, mainly including concentrated combustion, thermal combustion and catalytic combustion; the concentration combustion method is to utilize most of the components of the organic waste gas to be combustible, further concentrate the high-concentration VOCs and increase the concentrationA direct combustion method; the thermal combustion is a method of mixing and then combusting fuels such as natural gas and the like with VOCs; catalytic combustion is a process for completely oxidizing VOCs at a relatively low temperature (250 ℃ to 450 ℃) by the action of a catalyst. An absorption (recovery) method, which mainly comprises solvent absorption, electrostatic adsorption and condensation recovery; the solvent absorption method utilizes the principle of similar intermiscibility, and VOCs are separated and reused after being absorbed by an organic solvent; condensing and recycling different components of VOCs with different boiling points, and cooling and recycling certain components; the electrostatic adsorption is mainly used for treating oily waste gas, and the electrostatic field is utilized to charge oil drops and then the charged oil drops are adsorbed and recovered. The adsorption method mainly adopts activated carbon adsorption, and the activated carbon mainly adsorbs particles or gas molecules through micropore adsorption and surface unbalanced van der waals force and chemical bond force, so that the aim of removing VOCs is fulfilled. Decomposition methods, mainly including photocatalysis, infrared absorption particle technology and low temperature plasma method; the photocatalysis is based on the principle that the photocatalyst has strong oxidizability under the irradiation of ultraviolet light, and VOCs gas molecules adsorbed on the surface are oxidized and decomposed; low temperature plasma method utilizes energetic particles and radicals in the plasma to decompose VOCs into CO2And water. The traditional method has the problems of low removal rate (such as spraying, low-temperature plasma and activated carbon adsorption) of the waste gas difficult to treat, high operation cost (such as activated carbon adsorption, concentrated combustion and photocatalytic oxidation) and the like. For example, activated carbon adsorption, on one hand, the activated carbon adsorption equipment of many manufacturers is in long-term shutdown due to high operation cost and is only used during environmental protection inspection; on the other hand, activated carbon need handle according to dangerous chemicals after using, practicality greatly reduced, as traditional low temperature plasma processing technology again, it adopts power frequency high voltage power supply or direct current high voltage power supply, form such as through corona discharge gets rid of VOCs, however particle can't break some chemical bonds of major bond energy in its plasma that produces for it is underground to some VOCs clearance, is beaten into the micromolecule to the macromolecule even, and benzene class organic matter is handled back VOCs concentration and is 1-2 times than before handling on the contrary.
Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide an exhaust gas treatment technology for removing VOCs with high removal rate, high efficiency, low operation cost, simple process and wide applicability.
Disclosure of Invention
The invention aims to solve the technical problems of overcoming one or more defects in the prior art and providing a VOCs waste gas treatment system combining water curtain spraying treatment, atomization spraying treatment, gas-liquid separation treatment, plasma treatment and infrared absorption particle treatment to realize low-cost, high-efficiency and safe removal of VOCs, improve living environment and promote sustainable development of society.
In order to solve the technical problems, the invention adopts a technical scheme as follows:
the VOCs waste gas treatment method comprises the steps of water curtain spraying treatment, atomization spraying treatment, gas-liquid separation treatment, plasma treatment and infrared absorption particle treatment which are sequentially carried out.
In some embodiments of the present invention, in the water curtain spraying treatment step, the VOCs waste gas is introduced from the bottom of the water curtain spraying tower, and flows out from the top after being sprayed by the water curtain, the water curtain spraying treatment method adopts annular spraying, and the annular spraying includes a plurality of spraying portions, and the plurality of spraying portions are spirally distributed in the water curtain spraying tower.
In some embodiments of the present invention, in the atomized spray treatment step, the spray liquid comprises an aqueous liquid, and the aqueous liquid is atomized by an atomizer to form a layer of water film, wherein the water film is used for capturing fine particles in the waste gas of the VOCs, and the fine particles comprise paint particles, toluene and xylene.
In some embodiments of the present invention, in the gas-liquid separation treatment step, the mist and/or liquid droplets in the VOCs off-gas are removed by a gas-liquid separator, which is operated at normal temperature and pressure.
In some embodiments of the present invention, in the plasma treatment step, the VOCs off-gas treated in the gas-liquid separation treatment step is directed along an electric field parallel to a plasma generation electrode of a plasma generation deviceThe gas passes through the plasma generating electrode in the direction, so that the VOCs waste gas generates plasma which is electrically neutral as a whole and comprises electrons, positive ions, neutral particles and free radicals; and charging the surface of dust particles in the VOCs exhaust gas; the plasma reacts with oxygen molecules and water molecules in the VOCs waste gas to generate H, O, OH and O with strong oxidizing property3The active particles, VOCs in the VOCs waste gas generate gaseous carbon dioxide and water under the action of the active particles.
In some embodiments of the present invention, the plasma generating electrode includes a set of high voltage electrodes and a set of ground electrodes, the high voltage electrodes and the ground electrodes are both coated with an insulating medium, and the high voltage electrodes and the ground electrodes are both arranged in a linear shape; the high-voltage electrode is connected with a high-voltage power supply, and the high-voltage power supply is one or the combination of a positive polarity direct current high-voltage power supply, a positive polarity pulse high-voltage power supply or a positive polarity direct current superposed alternating current high-voltage power supply.
In some embodiments of the invention, in the infrared absorbing particulate treatment step, the waste gas of VOCs treated in the plasma treatment step is heated by an infrared heating device, so that the VOCs in the waste gas absorb infrared energy and further react with plasma remaining in the gas stream and decompose to form carbon dioxide and water; the infrared heating device comprises an infrared emitter, a gas containing cavity and infrared absorption particles distributed on the inner wall of the gas containing cavity, wherein a plurality of stand columns are arranged in the gas containing cavity, airflow is enabled to flow in a snake shape through the stand columns, and the infrared emitter outputs infrared light with the wavelength of 760 and 850 nm.
In some embodiments of the present invention, the method for treating VOCs exhaust uses the following treatment system:
the treatment system comprises a water curtain spray tower, an atomization spray tower, a gas-liquid separator, a plasma generation device and an infrared heating device which are sequentially connected and communicated;
the water curtain spray tower comprises a plurality of spraying parts, and the plurality of spraying parts are spirally distributed in the water curtain spray tower; the atomization spray tower comprises an atomizer and spray liquid, and the spray liquid forms layered film-shaped fog drops through the atomizer;
the plasma generating device comprises a plasma generating electrode and a high-voltage power supply, wherein the plasma generating electrode comprises a group of high-voltage electrodes and a group of grounding electrodes, the high-voltage electrodes and the grounding electrodes are both coated with insulating media, and the high-voltage electrodes and the grounding electrodes are both arranged in a linear mode; the high-voltage electrode is connected with the high-voltage power supply, and the high-voltage power supply is one or a combination of a positive polarity direct-current high-voltage power supply, a positive polarity pulse high-voltage power supply or a positive polarity direct-current superposed alternating-current high-voltage power supply;
the infrared heating device comprises an infrared emitter, a gas containing cavity and infrared absorption particles distributed in the gas containing cavity, wherein a plurality of stand columns are arranged in the gas containing cavity, airflow is enabled to flow in a snake shape through the stand columns, and the infrared emitter outputs infrared light with the wavelength of 760 and 850 nm.
Further, the plasma generating device also comprises a pressure sensor and a temperature sensor, wherein the pressure sensor and the temperature sensor are used for monitoring the pressure and the temperature in the plasma generating device in real time.
In the invention, the total removal rate of VOCs in the waste gas treated by the VOCs waste gas treatment method is more than or equal to 75%, wherein: carrying out dry-mass cultivation on the seeds at a speed of less than or equal to 17 mg/m; carrying out Toluene cultivation at a speed of less than or equal to 60 mg/m; and (5) carrying out xylene up to 90 mg/m.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the invention organically combines the steps of water curtain spraying treatment, atomization spraying treatment, gas-liquid separation treatment, plasma treatment and infrared absorption particle treatment, so that the steps are mutually cooperated to realize standard emission of VOCs, and the invention has the advantages of simple treatment process, low operation cost, wide applicability and high VOCs removal rate.
2. The invention solves the problem of low removal rate of the waste gas difficult to decompose in the traditional low-temperature plasma technology, and the flow direction of the VOCs waste gas is set to be parallel to the electric field direction of the plasma generating electrode of the plasma generating device, so that the reduction of the plasma processing effect caused by overlarge or undersize flow rate of the waste gas is overcome, the contact time and the contact area of the waste gas and the plasma are increased, and the high-efficiency utilization of the plasma is realized.
3. The invention adopts a unique infrared absorption particle treatment step and a plasma treatment step, realizes high removal rate of VOCs waste gas, has simple device, low cost and low energy consumption, meets the practical requirement and is suitable for large-area popularization.
4. The VOCs waste gas treatment system has the advantages of low investment, low operation and maintenance cost, small equipment floor area and high treatment efficiency, and can realize high-efficiency deodorization and peculiar smell removal, the treated waste gas can completely meet the specific technical index requirements of various environmental protection departments, and meanwhile, the deflagration caused by safety accidents such as rapid increase of VOCs concentration in a short time due to exhaust faults or other reasons and the like is avoided by additionally arranging temperature control and pressure control, the deflagration is prevented from spreading to workshops to cause injury and death of workers, and the safety performance is greatly improved.
Drawings
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 embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic flow chart illustrating the processing steps of the VOCs treatment system of the present invention;
FIG. 2 is a schematic diagram of one embodiment of a VOCs treatment system of the present invention;
FIG. 3 is a schematic structural diagram of a plasma generator according to the present invention;
fig. 4 is a schematic structural diagram of an infrared heating device of the present invention.
Detailed Description
The technical solution and the advantages thereof will be described in detail with reference to the following embodiments and the accompanying drawings.
Example 1
The sampling analysis is carried out on the VOCs waste gas of a certain factory, and the specific properties are as follows:
wherein, in the exhaust gas: carrying out dry bottom row cultivation on the root, 106.3 mg/m; carrying out Toluene 287.5 mg/m; dilute ethanol 627.5 mg/m.
As shown in fig. 1-4, the present embodiment provides a method for treating VOCs waste gas, comprising the steps of:
1) water curtain spray treatment
Introducing VOCs waste gas from the bottom of a water curtain spray tower 1, spraying the VOCs waste gas through a water curtain and then flowing out from the upper part, wherein the water curtain spray treatment mode adopts annular spray, the annular spray comprises a plurality of spraying parts 11, and the plurality of spraying parts 11 are distributed in the water curtain spray tower 1 in a spiral manner;
2) atomized spray treatment
The spraying liquid comprises water liquid, the water liquid is atomized through an atomizer 21 to form a layer of water film, the water film is used for capturing fine particles in VOCs waste gas, and the fine particles comprise paint particles, methylbenzene and dimethylbenzene;
3) gas-liquid separation treatment
Removing fog drops and/or liquid drops in the VOCs waste gas through a gas-liquid separator 3, wherein the gas-liquid separator 3 is operated at normal temperature and normal pressure;
4) plasma treatment
Passing the VOCs waste gas treated by the gas-liquid separation treatment step through a plasma generating electrode of a plasma generating device 4 along an electric field direction parallel to the plasma generating electrode, so that plasma which is electrically neutral and comprises electrons, positive ions, neutral particles and free radicals is generated in the VOCs waste gas; and charging the surface of dust particles in the VOCs exhaust gas; the plasma reacts with oxygen molecules and water molecules in the VOCs waste gas to generate H, O, OH and O with strong oxidizing property3The VOCs in the VOCs waste gas generate gaseous carbon dioxide and water under the action of the active particles; the plasma generating electrodes include a set of high voltage electrodes 42 and a set of ground electrodes 43, soThe high-voltage electrode 42 and the grounding electrode 43 are both coated with the insulating medium 41, and the high-voltage electrode 42 and the grounding electrode 43 are both arranged in a linear shape; the high-voltage electrode 42 is connected with a high-voltage power supply 46, and the high-voltage power supply 46 is one or a combination of a positive-polarity direct-current high-voltage power supply, a positive-polarity pulse high-voltage power supply or a positive-polarity direct-current superposed alternating-current high-voltage power supply;
in the embodiment, the direction of the electric field of the plasma is set to be consistent with the direction of the VOCs airflow, so that the contact time and the contact area of the VOCs airflow and the plasma beam are increased, the plasma beam is utilized to the maximum extent, and further, the energy conservation, the consumption reduction and the cost saving can be realized.
5) Infrared absorbing particulate treatment
Heating the VOCs waste gas treated by the plasma treatment step by an infrared heating device 5, so that VOCs in the waste gas absorb infrared energy and further react with plasma remained in the gas flow, and are decomposed to form carbon dioxide and water; the infrared heating device 5 comprises an infrared emitter, a gas accommodating cavity 53 and infrared absorption particles 52 distributed in the gas accommodating cavity 53, wherein a plurality of upright posts 51 are arranged in the gas accommodating cavity 53, airflow is enabled to flow in a snake shape through the upright posts 51, and the infrared emitter outputs infrared light with the wavelength of 800 nm;
the final exhaust gas is discharged via a stack 6.
Meanwhile, the treatment method of the VOCs waste gas of the embodiment adopts the following treatment system for treatment:
the treatment system comprises a water curtain spray tower 1, an atomization spray tower 2, a gas-liquid separator 3, a plasma generation device 4 and an infrared heating device 5 which are sequentially connected and communicated;
the water curtain spray tower 1 comprises a plurality of spraying parts 11, and the plurality of spraying parts 11 are spirally distributed in the water curtain spray tower 1; the atomization spray tower 2 comprises an atomizer 21 and spray liquid, and the spray liquid forms film-shaped fogdrops layer by layer through the atomizer 21;
the plasma generating device 4 comprises a plasma generating electrode and a high-voltage power supply, the plasma generating electrode comprises a group of high-voltage electrodes 42 and a group of grounding electrodes 43, the high-voltage electrodes 42 and the grounding electrodes 43 are both coated with insulating media 41, and the high-voltage electrodes 42 and the grounding electrodes 43 are both arranged in a linear shape; the high-voltage electrode 42 is connected with the high-voltage power supply 46, and the high-voltage power supply 46 is one or a combination of a positive-polarity direct-current high-voltage power supply, a positive-polarity pulse high-voltage power supply or a positive-polarity direct-current superposed alternating-current high-voltage power supply;
the infrared heating device 5 comprises an infrared emitter (not shown), a gas containing cavity 53 and infrared absorption particles 52 distributed in the gas containing cavity 53, wherein a plurality of upright posts 51 are arranged in the gas containing cavity 53, the upright posts 51 enable airflow to flow in a snake shape, and the output wavelength of the infrared emitter is 800nm infrared light.
Further, the plasma generating device 4 further comprises a pressure sensor 45 and a temperature sensor 44, wherein the pressure sensor 45 and the temperature sensor 44 are used for monitoring the pressure and the temperature in the plasma generating device 4 in real time.
The whole set of VOCs waste gas treatment process is to initially capture large-particle dust by spraying water curtain; then, fine particles (paint particles, toluene, xylene and the like) in the waste gas are captured by water in a dust remover through a layer of water film formed by atomizing spray liquid in the atomizing spray tower 2 through the atomizer 21, pass through a water curtain and enter a gas-water channel, so that part of organic VOCs gas and particles after atomization and absorption enter a sewage system through spraying, and the VOCs removal efficiency can reach about 15 percent through the step; the temperature sensor 44 and the pressure sensor 45 are arranged to avoid explosion and explosion caused by safety accidents such as rapid increase of the concentration of VOCs in a short time caused by exhaust faults or other reasons; the gas-liquid separation treatment is used as a pretreatment process of the plasma treatment, so that most of water vapor and the like caused by spraying can be removed, and the plasma treatment efficiency is prevented from being influenced; the plasma technology and the infrared absorption particle technology decompose the residual VOCs gas molecules into CO2And H2The highest decomposition rate of total VOCs gas can reach more than 90 percent, and the tail gas has no peculiar smell or stink of the common treatment method.
The total removal rate of VOCs in the exhaust gas treated by the VOCs exhaust gas treatment method of the embodiment is 92%, wherein: carrying out ethanol distillation at a ratio of 8.5 mg/m; carrying out toluene cultivation at 23.0 mg/m; hexarene 50.2 mg/m.
From the above description, the beneficial effects of the present invention are: the removal rate of the VOCs waste gas can reach more than 90 percent at most, the problem that the existing waste gas treatment technology is difficult to meet the continuously improved emission standard requirement is solved, and the emission pollution of the VOCs waste gas to the environment is thoroughly eliminated; the whole treatment process is simple and easy to operate, the treatment efficiency is high, the required equipment is few, the energy consumption of the equipment is low, the requirements of modern enterprises on energy conservation and emission reduction and production benefit improvement are well met, and the method has great significance for saving resources and reducing cost.
Comparative example 1
The general process flow of the low-temperature plasma treatment technology is as follows: water curtain spray → low temperature plasma treatment → water spray → discharge
And (3) processing results: the total removal of VOCs was 50%, wherein in the exhaust gas: carrying out dry bulb harvest with the benzene content of 53.1 mg/m; carrying out high yield and high yield cultivation on the seeds with the toluene content of 143.3 mg/m; the xylene content was 313.8 mg/m.
Comparative example No. two
This example is substantially the same as example 1 except that the plasma treatment in this example employs low temperature plasma treatment and does not include infrared absorbing particulate treatment.
The process flow is as follows: water curtain spray → atomization spray → gas-liquid separation → low temperature plasma treatment → discharge
And (3) processing results: the total removal rate of VOCs in the waste gas is 60%, wherein: carrying out dry bulb harvest with the benzene content of 42.5 mg/m; carrying out high-yield high; the xylene content is 251.0 mg/m.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.

Claims (5)

1.一种VOCs废气处理系统，其特征在于，所述处理系统包括依次连接联通的水幕喷淋塔、雾化喷淋塔、气液分离器、等离子体发生装置和红外加热装置，以及与所述红外加热装置连通的烟囱；1. a VOCs waste gas treatment system, is characterized in that, described treatment system comprises the water curtain spray tower, atomization spray tower, gas-liquid separator, plasma generating device and infrared heating device that are connected successively, and with the chimney communicated by the infrared heating device; 所述水幕喷淋塔包括多个喷洒部，多个所述喷洒部在所述水幕喷淋塔内呈螺旋型分布；The water curtain spray tower includes a plurality of spray parts, and the plurality of spray parts are distributed in a spiral shape in the water curtain spray tower; 所述雾化喷淋塔包括雾化器和喷淋液，所述喷淋液通过所述雾化器形成层层膜状雾滴，所述膜状雾滴用于捕获VOCs废气中的细微颗粒，所述细微颗粒包括油漆颗粒、甲苯和二甲苯；其中，所述喷淋液包括水液，将所述水液通过所述雾化器形成层层水膜；The atomization spray tower includes an atomizer and a spray liquid, and the spray liquid forms layers of film droplets through the atomizer, and the film droplets are used to capture fine particles in VOCs exhaust gas , the fine particles include paint particles, toluene and xylene; wherein, the spray liquid includes water liquid, and the water liquid is passed through the atomizer to form layers of water films; 所述等离子体发生装置包括等离子体发生电极和高压电源，所述等离子体发生电极包括一组高电压电极和一组接地电极，所述高电压电极与所述接地电极均包覆有绝缘介质，所述高电压电极与所述接地电极均呈线型排列；其中，将经所述气液分离器处理过的VOCs废气沿平行于所述等离子体发生装置的等离子体发生电极的电场方向通过所述等离子体发生电极，使得VOCs废气中产生包括电子、正离子、中性粒子、自由基的整体呈电中性的等离子体；并且使得VOCs废气中的灰尘颗粒表面带电；等离子体与VOCs废气中的氧分子、水分子作用，生成具有强氧化性的H、O、OH、O3活性粒子，VOCs废气中的VOCs在活性粒子的作用下生成气态二氧化碳以及水；The plasma generating device includes a plasma generating electrode and a high-voltage power supply, the plasma generating electrode includes a group of high-voltage electrodes and a group of ground electrodes, and both the high-voltage electrode and the ground electrode are covered with an insulating medium, Both the high-voltage electrode and the ground electrode are arranged in a line; wherein, the VOCs waste gas treated by the gas-liquid separator is passed through the electric field parallel to the direction of the electric field of the plasma generating electrode of the plasma generating device. The plasma generating electrode described above makes the VOCs waste gas generate an overall electrically neutral plasma including electrons, positive ions, neutral particles and free radicals; and makes the surface of the dust particles in the VOCs waste gas charged; The action of oxygen molecules and water molecules in VOCs generates highly oxidizing H, O, OH, O 3 active particles, and VOCs in VOCs waste gas generate gaseous carbon dioxide and water under the action of active particles; 所述红外加热装置包括红外线发射器、气体容置腔，以及分布在所述气体容置腔内壁上的红外吸收微粒，所述气体容置腔内设有多个立柱，多个所述立柱使气流呈蛇形流通，所述红外线发射器的输出波长为760-850nm的红外光，所述红外加热装置用于加热经过所述等离子体发生装置处理过的VOCs废气，以使废气中的VOCs吸收红外能量并和残留在气流中等离子体进一步作用，且分解形成二氧化碳和水；The infrared heating device includes an infrared emitter, a gas accommodating cavity, and infrared absorbing particles distributed on the inner wall of the gas accommodating cavity. The airflow is serpentine, and the infrared emitter outputs infrared light with a wavelength of 760-850 nm. The infrared heating device is used to heat the VOCs exhaust gas treated by the plasma generating device, so that the VOCs in the exhaust gas can be absorbed The infrared energy further interacts with the plasma remaining in the airflow, and decomposes to form carbon dioxide and water; 经所述VOCs废气处理系统处理后的废气中VOCs总去除率大于等于75%，其中，废气中：苯≤17mg/m³；甲苯≤60mg/m³；二甲苯≤90mg/m³。The total removal rate of VOCs in the exhaust gas treated by the VOCs exhaust gas treatment system is greater than or equal to 75%, among which, in the exhaust gas: benzene≤17mg/m³; toluene≤60mg/m³; xylene≤90mg/m³. 2.根据权利要求1所述的VOCs废气处理系统，其特征在于，所述水幕喷淋塔中，将VOCs废气从所述水幕喷淋塔的底部通入，经水幕喷淋后从上部流出。2. The VOCs waste gas treatment system according to claim 1, wherein, in the water curtain spray tower, the VOCs waste gas is introduced from the bottom of the water curtain spray tower, and after being sprayed by the water curtain, top out. 3.根据权利要求1所述的VOCs废气处理系统，其特征在于，所述气液分离器在常温常压下操作。3. The VOCs waste gas treatment system according to claim 1, wherein the gas-liquid separator operates at normal temperature and pressure. 4.根据权利要求1所述的VOCs废气处理系统，其特征在于，所述高电压电极连接所述高压电源，所述高压电源为正极性直流高压电源、正极性脉冲高压电源或正极性直流叠加交流高压电源中的一种或其组合。4. The VOCs waste gas treatment system according to claim 1, wherein the high-voltage electrode is connected to the high-voltage power supply, and the high-voltage power supply is a positive-polarity DC high-voltage power supply, a positive-polarity pulsed high-voltage power supply or a positive-polarity DC superposition One or a combination of AC high voltage power sources. 5.根据权利要求1所述的VOCs废气处理系统，其特征在于，所述等离子体发生装置还包括压力传感器和温度传感器，所述压力传感器、温度传感器用于实时监测所述等离子体发生装置内的压力和温度。5. The VOCs exhaust gas treatment system according to claim 1, wherein the plasma generating device further comprises a pressure sensor and a temperature sensor, and the pressure sensor and the temperature sensor are used for real-time monitoring in the plasma generating device pressure and temperature.
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