CN111185049A - Method for reducing aerosol generated by low-temperature plasma treatment of waste gas through adsorption separation net - Google Patents
Method for reducing aerosol generated by low-temperature plasma treatment of waste gas through adsorption separation net Download PDFInfo
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- CN111185049A CN111185049A CN201811350157.1A CN201811350157A CN111185049A CN 111185049 A CN111185049 A CN 111185049A CN 201811350157 A CN201811350157 A CN 201811350157A CN 111185049 A CN111185049 A CN 111185049A
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- separation net
- adsorption separation
- temperature plasma
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- waste gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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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
- B01D53/323—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 by electrostatic effects or by high-voltage electric fields
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention discloses a method for reducing waste gas aerosol treatment by low-temperature plasma through an adsorption separation net, which comprises the following specific steps: in the device for treating industrial waste gas by multistage low-temperature plasmas, an adsorption separation net made of a flame-retardant material is added between two low-temperature plasma generators so as to adsorb coking particles generated at the discharge part of the upper stage in the device. The adsorption separation net is made of an insulating material; the adsorption separation net is integrally of a block cage structure, and an adsorption material is filled in an inner space formed by the adsorption separation net; the adsorbing material is selected from active carbon, zeolite, molecular sieve, ozone decomposer or high molecular organic material. According to the invention, the adsorption separation net is arranged in the relevant area of the device for treating the industrial waste gas by using the low-temperature plasma, so that the coking of the electrode can be greatly relieved, the continuous working time of the whole device is reduced, and the degradation effect on total hydrocarbon is improved by 10-20%.
Description
Technical Field
The invention relates to a waste gas treatment method, in particular to a method for treating waste gas by adopting a low-temperature plasma technology, and more particularly to a method for reducing aerosol generated by treating waste gas by low-temperature plasma through an adsorption separation net.
Background
VOCs and malodorous gases are one of the important sources of exhaust gas pollution. Recently, a series of latest emission standards (such as GB 31571-2015) related to VOCs and malodorous gases in China put forward stricter requirements on the emission and treatment of VOCs and malodorous gases.
The low-temperature plasma is already applied to VOCs and malodorous gas treatment, and has the advantages of low energy consumption, strong adaptability, high treatment speed and the like. Because the components such as dust, aerosol, PM2.5 and the like exist in the industrial waste gas and the macromolecular polymer generated by the reaction of the low-temperature plasma among the waste gas components in the discharging process easily generates coking and aerosol at the low-temperature plasma discharging part, the coking phenomenon of the low-temperature plasma is more serious when the benzene-containing waste gas and the styrene-containing waste gas are treated. In order to improve the waste gas treatment efficiency, the low-temperature plasma waste gas treatment device mostly adopts multi-stage treatment, aerosol generated by a discharge electrode or a generator at the upper stage is easily adsorbed on a discharge electrode or a discharge disc at the lower stage, and coking is aggravated. The coking wrapped on the discharge part not only reduces the efficiency of treating waste gas by low-temperature plasma, increases energy consumption and reduces service life, but also increases operation burden by repeated decoking work.
Disclosure of Invention
In view of the above technical problems, the present invention provides a method for reducing aerosol generated from low temperature plasma processing exhaust gas by using an adsorption separation net.
The technical solution adopted by the invention is as follows:
a method for reducing aerosol generated by low-temperature plasma treatment of waste gas through an adsorption separation net comprises the following steps: in the device for treating industrial waste gas by low-temperature plasma, an adsorption separation net made of flame-retardant materials is added between a positive electrode and a negative electrode which are continuously discharged or in a non-discharge area which is discharged at intervals so as to adsorb aerosol generated at a part of discharge positions in the device.
Preferably, the device for treating the industrial waste gas by the low-temperature plasma is in continuous discharge or interval discharge; if the device is in continuous discharge, the adsorption separation net is filled between the positive electrode and the negative electrode of the device; if the device is a spaced discharge, the adsorption screen is placed in the non-discharge region between the two stages of discharge regions in the exhaust gas flow direction.
Preferably, the adsorptive separation net is made of an insulating flame-retardant material.
Preferably, the adsorption separation net is of a massive cage structure as a whole, and an adsorption material is filled in an inner space formed by the adsorption separation net in a surrounding mode.
Preferably, the adsorbing material is selected from activated carbon, zeolite, molecular sieve, ozone decomposer or high molecular organic material.
Preferably, the pore diameter of the adsorption separation net is 10-100 μm.
Preferably, the adsorption separation net is an adsorption separation net with the performance of resisting high temperature of more than 100 ℃.
The beneficial technical effects of the invention are as follows:
according to the invention, the adsorption separation net is arranged in the relevant area of the device for treating the industrial waste gas by using the low-temperature plasma, so that the coking of the electrode can be greatly relieved, the continuous working time of the whole device is improved by 20-50%, and the degradation effect on total hydrocarbon is improved by 10-20%. The invention aims to solve the problem that the last part of a device for treating industrial waste gas by multistage low-temperature plasmas carries out graded coking and pollution on the last part.
Drawings
The invention will be further described with reference to the following detailed description and drawings:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another embodiment of the present invention.
Detailed Description
According to the device for treating the industrial waste gas by the multistage low-temperature plasma, the adsorption separation net made of the flame-retardant material is additionally arranged between the anode and the cathode which are continuously discharged or in the non-discharge area which is discharged at intervals so as to adsorb coking particles generated by the previous stage of discharge part, so that the previous stage of discharge part is prevented from generating coking pollution to the next stage, and the problem of coking pollution of the previous stage of the low-temperature plasma device to the next stage is specifically solved.
This is explained in more detail below:
a method for reducing aerosol generated by low-temperature plasma treatment of waste gas through an adsorption separation net comprises the following steps: in the device for treating industrial waste gas by low-temperature plasma, an adsorption separation net made of flame-retardant materials is added between a positive electrode and a negative electrode which are continuously discharged or in a non-discharge area which is discharged at intervals so as to adsorb aerosol generated at a part of discharge positions in the device.
The adsorption separation net is made of an insulating material and is required to have a high temperature resistance of 100 ℃.
The adsorption separation net is of a massive cage structure, and an adsorption material is filled in an inner space formed by the adsorption separation net in a surrounding mode. The adsorbing material is selected from active carbon, zeolite, molecular sieve, ozone decomposer or high molecular organic material.
The pore diameter of the adsorption separation net is 20-100 μm.
Fig. 1 and 2 show two arrangements of the adsorption separation net, which can be specifically determined according to the discharge form of the device for treating industrial waste gas by low-temperature plasma. The device for treating the industrial waste gas by the low-temperature plasma can be a continuous discharge or a spaced discharge. In the case of continuous discharge, as shown in fig. 1, the adsorption spacer net may be filled between the positive and negative electrodes. In the case of the intermittent discharge, as shown in fig. 2, the adsorption screen may be disposed in a non-discharge region between two stages of discharge regions in the flow direction of the exhaust gas.
Parts not described in the above modes can be realized by adopting or referring to the prior art.
It should be noted that the above-mentioned embodiments are only for illustrating the technical ideas and features of the present invention, and the purpose of the present invention is to enable a skilled person to understand the contents and methods of the present invention and to implement the method smoothly, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the disclosure of the present invention are covered by the protection scope of the present invention.
Claims (7)
1. A method for reducing aerosol generated by low-temperature plasma treatment of waste gas through an adsorption separation net is characterized by comprising the following steps: in the device for treating industrial waste gas by low-temperature plasma, an adsorption separation net made of flame-retardant materials is added between a positive electrode and a negative electrode which are continuously discharged or in a non-discharge area which is discharged at intervals so as to adsorb aerosol generated at a part of discharge positions in the device.
2. The method of claim 1 for reducing aerosol generation from low temperature plasma processing of exhaust gases by an adsorptive screen, wherein: the device for treating the industrial waste gas by the low-temperature plasma is in continuous discharge or intermittent discharge; if the device is in continuous discharge, the adsorption separation net is filled between the positive electrode and the negative electrode of the device; if the device is a spaced discharge, the adsorption screen is placed in the non-discharge region between the two stages of discharge regions in the exhaust gas flow direction.
3. The method of claim 1 for reducing aerosol generation from low temperature plasma processing of exhaust gases by an adsorptive screen, wherein: the adsorption separation net is made of an insulating flame-retardant material.
4. The method of claim 1 for reducing aerosol generation from low temperature plasma processing of exhaust gases by an adsorptive screen, wherein: the adsorption separation net is of a massive cage structure, and an adsorption material is filled in an inner space formed by the adsorption separation net in a surrounding mode.
5. A method of reducing aerosol generation from low temperature plasma processing exhaust through an adsorbent screen as claimed in claim 3, wherein: the adsorbing material is selected from active carbon, zeolite, molecular sieve, ozone decomposer or high molecular organic material.
6. The method of claim 1 for reducing aerosol generation from low temperature plasma processing of exhaust gases by an adsorptive screen, wherein: the aperture of the adsorption separation net is 10-100 μm.
7. The method of claim 1 for reducing aerosol generation from low temperature plasma processing of exhaust gases by an adsorptive screen, wherein: the adsorption separation net is an adsorption separation net with the performance of resisting high temperature of more than 100 ℃.
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| CN201811350157.1A CN111185049B (en) | 2018-11-14 | 2018-11-14 | Method for reducing aerosol generated by low-temperature plasma treatment of waste gas through adsorption separation net |
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| CN201811350157.1A CN111185049B (en) | 2018-11-14 | 2018-11-14 | Method for reducing aerosol generated by low-temperature plasma treatment of waste gas through adsorption separation net |
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| CN111185049B CN111185049B (en) | 2022-07-08 |
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| CN111185049B (en) | 2022-07-08 |
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Effective date of registration: 20220608 Address after: No. 22, Chaoyangmen street, Chaoyang District, Beijing 100020 Applicant after: CHINA PETROLEUM & CHEMICAL Corp. Applicant after: Sinopec Safety Engineering Research Institute Co.,Ltd. Address before: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Applicant before: CHINA PETROLEUM & CHEMICAL Corp. Applicant before: SINOPEC Research Institute OF SAFETY ENGINEERING |
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