CN107694298A - The method and apparatus of pollutant in processing gas - Google Patents

The method and apparatus of pollutant in processing gas Download PDF

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Publication number
CN107694298A
CN107694298A CN201711127756.2A CN201711127756A CN107694298A CN 107694298 A CN107694298 A CN 107694298A CN 201711127756 A CN201711127756 A CN 201711127756A CN 107694298 A CN107694298 A CN 107694298A
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China
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gas
pollutant
processing gas
electrochemical
plasma
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CN201711127756.2A
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Chinese (zh)
Inventor
王雨化
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上海睿筑环境科技有限公司
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Priority to CN201711127756.2A priority Critical patent/CN107694298A/en
Publication of CN107694298A publication Critical patent/CN107694298A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/32Separation 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
    • B01D53/323Separation 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/32Separation 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
    • B01D53/326Separation 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 in electrochemical cells
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75Multi-step processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/70Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708Volatile organic compounds V.O.C.'s
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2259/00Type of treatment
    • B01D2259/80Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
    • B01D2259/818Employing electrical discharges or the generation of a plasma

Abstract

The invention discloses a kind of method of pollutant in processing gas, this method first carries out the preposition purified treatment of electrochemistry to pending gas and carries out corona treatment again with the pollutant in gas of degrading.By making pending gas pass through the electrochemical electrode system containing oxidizing species or strong oxidizing property intermediate, improve ability and reactivity that organic gas molecule carries microlayer model, effectively promote the gas treating process of follow-up corona treatment, so that rearmounted corona treatment, the removal efficiency of volatile organic matter gas is not only further improved under the auxiliary of preposition electrochemical treatments, while the new component of the organic gas reaction generation in the preposition purified treatment of electrochemistry can be removed.The equipment for also disclosing pollutant in processing gas simultaneously, is separated into electrochemical treatments region and plasma treatment zone, pending gas flows through the electrochemical treatments region with being flowed out behind the plasma treatment zone by air outlet successively by air channel shell.

Description

The method and apparatus of pollutant in processing gas
Technical field
The present invention relates to a kind of method and apparatus of pollutant in environmental technology field, more particularly to processing gas.
Background technology
Volatile organic matter (VOCS, volatile organic compounds) refers to that saturated vapor pressure is more than under normal temperature Organic compound of the boiling point at 50~260 DEG C under 133.32Pa, normal pressure, such as toluene, hexamethylene, formaldehyde etc., or in normal temperature Any organic solid that can be volatilized or liquid under normal pressure.With industrial expansion, VOCS discharge capacity dramatically increases, and VOCS pairs Huge harm be present in the health and living environment of the mankind;Thus how gas is purified, effectively removed in gas VOCS has turned into a focus of field of Environment Protection concern.
VOCS method mainly has plasma gas processing mode in existing processing gas, and it is introduced directly into pending Waste gas, volatile organic matter gas molecule is bombarded by the motion of the negative ions that are driven in extra electric field, and then broken Its bad molecular structure is translated into CO2、H2O, CO etc., it is empty to reach purification so as to reduce or remove volatile organic compounds The purpose of gas.Or the preceding filter layer (such as activated carbon, cloth bag) for being equipped with stronger absorption property carries out corona treatment, mistake again The main function of filtering layer is preliminarily reduced in waste gas to reduce larger-size particulate matter, steady air flow field in waste gas Gas molecule.
However, which kind of plasma generating mode no matter used, the reaction efficiency of negative ions and gas molecule is very Limited, under the dynamic condition for especially having certain flow rate in air flue, therefore plasma air purifying is limited to processing dirt always Contaminate the application scenario of thing concentration relatively low (about 100ppm) itself.
Therefore, it is necessary to the processing mode of pollutant in gas is improved.
The content of the invention
The present invention proposes a kind of method and apparatus of pollutant in processing gas, with more effectively to the pollution in gas Thing is handled.
In order to solve the above problems, the method for pollutant, this method include following in a kind of processing gas of present invention offer Step:
S1, the preposition purified treatment of electrochemistry is carried out to pending gas;
S2:Corona treatment is carried out to the gas after the preposition purified treatment of electrochemistry with the pollutant in gas of degrading.
The preposition purified treatment of electrochemistry at least to:Make part organic gas molecule hydrophilic, form gas-microlayer model Mixture.
The corona treatment at least to:Gas-microlayer model mixture is set to be ionized and degrade.
The preposition purified treatment of electrochemistry also at least to:Remove the soluble pollutant in part;And/or have part Machine gas molecule decomposes, and forms metastable state molecule;And/or make part organic gas molecule activation, form anakmetomeres.
The corona treatment also at least to:Make anakmetomeres and/or metastable state molecule in electric field and plasma Effect is lower to occur ionization decomposition.
Preferably, the solution that the preposition purified treatment of the electrochemistry uses for:Be injected in the negative electrode of electrochemical treater with Dynamic moisture film between anode.
In one embodiment of the invention, the raw material of the dynamic moisture film is running water or hydrogen peroxide solution.
In one embodiment of the invention, the material substrate of the negative electrode and anode is titanium, substrate surface be provided with ruthenium, One or several kinds in iridium, iron, rhodium, palladium, platinum, lead, tantalum and its alloy or oxide.
In one embodiment of the invention, the generation electrode that the corona treatment uses is shaped as flat board, circle Cylinder is cylindric.
In one embodiment of the invention, the surface that electrode occurs is insulating materials or nanometer conductive material.
Meanwhile in order to solve the above problems, the equipment of the invention that pollutant in a kind of processing gas is also provided, including air channel Shell, the air channel shell are divided into electrochemical treatments region and plasma treatment zone, and pending gas is from air channel The air intake vent of shell enters, and flow through successively the electrochemical treatments region with behind the plasma treatment zone by air channel outside The air outlet outflow of shell;Wherein:
The electrochemical treatments region is used to carry out the preposition purified treatment of electrochemistry to pending gas;
The plasma treatment zone is used to carry out corona treatment to the gas after the preposition purified treatment of electrochemistry With the pollutant in gas of degrading.
More than one group electrochemical electrode pair is provided with the electrochemical treatments region, every group of electrochemical electrode is to including Negative electrode and anode.
In one embodiment of the invention, all anodes pass through the first circuit interface after the first conductive component parallel connection It is electrically connected with the positive pole of power supply, all negative electrodes pass through the negative of second circuit interface and power supply after the second conductive component parallel connection Pole is electrically connected with.
Preferably, in addition to water washing device, the water washing device are arranged in the air channel shell, by the air channel shell It is separated into electrochemical treatments region and plasma treatment zone;The water washing device is used to spray to the electrochemical treatments region Liquid is penetrated, dynamic moisture film is formed between the negative electrode and anode in the electrochemical treatments region, as the preposition purification of chemistry The solution of processing.
In one embodiment of the invention, the water washing device includes:Water supply line, the water supply line is described in The side in electrochemical treatments region is provided with some nozzles, and liquid sprays through some nozzles, in the electrochemical treatments area Dynamic moisture film is formed between the negative electrode and anode in domain.
Preferably, the water washing device also includes the water fender being obliquely installed, and the water fender is positioned close to described etc. The side of gas ions processing region.
In one embodiment of the invention, the plasma treatment zone is provided with more than one group of generation electrode, Every group of generation electrode includes negative electrode and anode.
In one embodiment of the invention, all anodes pass through tertiary circuit interface after the 3rd conductive component parallel connection It is electrically connected with the positive pole of power supply, all negative electrodes pass through the negative of the 4th circuit interface and power supply after the 4th conductive component parallel connection Pole is electrically connected with.
The present invention is allowed to compared with prior art, the advantages of following and actively effect be present due to using above technical scheme Fruit:
1) in processing gas provided by the invention pollutant method, before first carrying out electrochemistry to pending gas Purified treatment is put, then corona treatment is carried out with the pollution in gas of degrading to the gas after the preposition purified treatment of electrochemistry Thing, prefilter only is carried out to gas before any plasma treatment so as to solve the method for pollutant in traditional processing gas The shortcomings that volatile organic matter gas ionization thus can not be effectively facilitated, by the present invention in that pending gas passes through containing strong The electrochemical electrode system of oxidizing substance or strong oxidizing property intermediate, improve the energy that organic gas molecule carries microlayer model Power and reactivity, effectively promote the gas treating process of follow-up corona treatment so that at rearmounted plasma Reason, not only further improves the removal efficiency of volatile organic matter gas under the auxiliary of preposition electrochemical treatments, while can go Except the new component of the organic gas reaction generation in the preposition purified treatment of electrochemistry.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram of the equipment of pollutant in processing gas provided in an embodiment of the present invention;
Fig. 2 is the schematic top plan view of the equipment of pollutant in processing gas provided in an embodiment of the present invention;
Fig. 3 is toluene gas gas chromatogram pending in one embodiment of the invention;
Fig. 4 is the toluene gas gas chromatogram after only being handled in one embodiment of the invention by electrochemical purification;
Fig. 5 is the toluene gas gas chromatogram after only being handled in one embodiment of the invention by plasma for purification;
Fig. 6 is to combine purification by the preposition purified treatment of electrochemistry and plasma for purification processing in one embodiment of the invention Toluene gas gas chromatogram afterwards;
Fig. 7 is n-hexane gas gas chromatogram pending in another embodiment of the present invention;
Fig. 8 is the n-hexane gas gas chromatogram after only being handled in another embodiment of the present invention by electrochemical purification;
Fig. 9 is the n-hexane gas gas-chromatography after only being handled in another embodiment of the present invention by plasma for purification Figure;
Figure 10 is after being combined in another embodiment of the present invention by electrochemical purification processing and plasma for purification processing N-hexane gas gas chromatogram.
In figure:1- air channel shells, 2- air channels top cover, 3- electrochemical electrodes, the conductive components of 4- first, the circuits of 5- first connect Mouthful, the conductive components of 6- second, 7- second circuit interfaces, 8- discharge outlet, 9 water route interfaces, 10- water supply lines, 11- nozzles, 12- gears Electrode, the conductive components of 14- the 3rd, 15- tertiary circuit interfaces, the conductive components of 16- the 4th, the circuits of 17- the 4th occur for water plate, 13- Interface
Embodiment
The method and apparatus of pollutant in processing gas proposed by the present invention is made below in conjunction with the drawings and specific embodiments It is further described.According to following explanation and claims, advantages and features of the invention will become apparent from.It should be noted It is that accompanying drawing uses using very simplified form and non-accurately ratio, only to convenience, lucidly aids in illustrating this hair The purpose of bright embodiment.
Before this present invention is proposed, present inventor enters to the method for pollutant in current possible processing gas Sufficient research is gone, specific research is as follows:
1) traditional plasma gas processing mode is introduced directly into pending gas or is only before equipped with stronger absorption The filter layer of performance, the main function of filter layer are to reduce larger-size particulate matter, steady air flow field in gas, while tentatively Ground reduces the gas molecule in waste gas;Filter layer is adsorption effect with pending gas interaction, after flowing through filter layer The gas molecule for being moved to follow-up plasma gas processing system does not react, that is, flows through the gas molecule sheet of filter layer Body does not change, so prefilter layer does not have booster action for plasma gas processing procedure.Regardless of whether using The reaction efficiency of which kind of plasma generating mode, negative ions and gas molecule is extremely limited, especially has in air flue Under the dynamic condition of certain flow rate, therefore plasma air purifying is limited to handle the relatively low application of pollutant concentration itself always Occasion.
2) applicant is largely tested on the basis of the mechanism of research plasma gas processing, if finding gas Molecule, which carries hydrone, will promote gas molecule ionization in the electric field and improves the generation efficiency of plasma, therefore apply People also attempts first to wash gas before corona treatment is carried out to gas, i.e., in plasma gas processing unit Preposition water washing device, but because dissolution rate of the substantial amounts of volatile organic matter gas molecule in water is very low, for example toluene exists Solubility in water is only 0.053g/100mL (temperature be 25 DEG C when), so directly allowing pending volatile organic matter gas Molecule flows through the aqueous solution and is difficult to the carrying of hydrone, while also is difficult to realize the direct absorption of many class organic gas.
In order that gas molecule carries hydrone, applicant is attempted using atomized steam directly in apparatus for processing plasma Middle importing microlayer model, it is found that there is the micro-arc discharge that microlayer model cohesion causes plasma-generating electrode, can It can explode;Gas treatment efficiency is reduced on the contrary, while exacerbates the danger of plasma gas processing equipment.Using Atomized steam be introduced directly into microlayer model way be only applicable to electric signal analyze based on na level Weak current sensors field Close.
Based on the studies above, present inventor creatively devises a kind of with reference to liquid state electrochemical, gas electronic Learn and the method for gas purification of plasma technique, this method cover three kinds of states of liquid, gas, plasma of material, be a kind of The wide method for gas purification of high efficiency, low cost, processing gas category.Specifically, the invention provides one kind to handle gas The method of pollutant, this method comprise the following steps in body:
S1, the preposition purified treatment of electrochemistry is carried out to pending gas;The step at least to:Make part organic gas Molecule is hydrophilic, forms gas-microlayer model mixture;
S2:Corona treatment is carried out to the gas after the preposition purified treatment of electrochemistry with the pollutant in gas of degrading; The step at least to:Gas-microlayer model mixture is set to be ionized and degrade.
The method of pollutant is by caused active group in the preposition purified treatment of electrochemistry in the processing gas of the present invention, Gas molecule is carried more drops, gas-microlayer model mixture is formed, so as to which the office of follow-up corona treatment be substantially improved Portion's electric microfield improves overall volatile organic matter removal efficiency to promote the ionization of gas molecule, realizes wider range The purpose of air is purified under scene.
Because dissolution rate of the substantial amounts of volatile organic matter gas molecule in water is very low, thus those skilled in the art It is extremely difficult to expect by making organic gas molecule hydrophilic, the mode of gas-microlayer model mixture is formed to improve the place of plasma Efficiency is managed, the present invention is to act in a diametrically opposite way, and the technology prejudice of this area is overcome from thinking.Dexterously it make use of in addition The mode of electrochemistry, by caused active group in electrochemical treatments, gas molecule is carried more drops, formed gas- Microlayer model mixture, further solving to be introduced directly into caused by atomized steam reduces gas treatment efficiency, simultaneously plus Acute dangerous the problem of holding of plasma gas processing equipment, unexpected technique effect is reached.
Certainly, in the processing gas of the present invention in the method for pollutant, the preposition purified treatment of electrochemistry is also at least To:Remove the soluble pollutant in part;And/or part organic gas molecule is decomposed, form metastable state molecule;And/or Make part organic gas molecule activation, form anakmetomeres.The corona treatment also at least to:Make anakmetomeres and/ Or ionization decomposition occurs under electric field and action of plasma for metastable state molecule.In addition, in the mistake of the preposition purified treatment of electrochemistry Cheng Zhong, it is understood that there may be part organic gas molecule addition, the phenomenon of macromolecular is formed, for this possible situation, the plasma Body processing can also decompose to the macromolecular for forming addition with Plasma Interaction.So as to further carry The efficiency of high beta plasma processing, more effectively remove the organic pollution in gas.
Wherein, electrochemical treatments can for example be carried out using sewage disposal with electrode system, sewage disposal electrode system Principle is:Using electrolysis tech between electrode, specifically, it is anti-that electrochemical electrolysis occurs between electrochemical electrode using electrochemical solution Should and caused Strong oxdiative material is as reactant or catalyst that (wherein, oxidizing species caused by electrochemical reaction include Chlorate, hypochlorite, H2O2And O3, the intermediate of strong oxidizing property includes electronics, HO-、HO2、O2-Deng free radical), in waste water Harmful substance molecule, in the presence of oxidizing species or strong oxidizing property intermediate, redox reaction change, which will occur, to be had Machine thing molecular formula, increases mass transfer driving force, and organic molecule improves with water affinity;Generation oxidation Decomposition is converted into Water, CO2, inorganic salts;Generation addition reaction makes to form macromolecular between organic molecule;Generation electron transfer reaction, form activation Molecule or metastable state molecule.By passing through the sewage disposal electrode system containing oxidizing species or strong oxidizing property intermediate System, ability and reactivity that organic gas molecule carries microlayer model are improved, effectively promotes follow-up plasma gas Gas treating process in body processor.Rearmounted plasma gas processing equipment, not only in preposition sewage disposal electrode The removal efficiency of volatile organic matter gas is further improved under the auxiliary of system, while sewage disposal electrode system can be removed The new component of middle organic gas reaction generation, these new components for example can be:Hydroxyl radical free radical can add with benzene ring structure molecule Into, also can be with thymidine generation addition reaction, one hydroxyl of increase and another group in reactant molecule structure.
Preferably, the solution that the preposition purified treatment of the electrochemistry uses for:It is injected in electrochemical treatments Dynamic moisture film between the negative electrode and anode of device.Solution of the dynamic moisture film one side as the preposition purified treatment of electrochemistry, separately On the one hand the flow velocity of gas can be reduced so that gas can be relatively more fully anti-during the preposition purified treatment ground of electrochemistry Should;In addition, the dynamic moisture film also can remove the pollutant of the part solubility in gas as solution.
As further preferred embodiment, the raw material of the dynamic moisture film is running water or hydrogen peroxide solution, running water Or hydrogen peroxide be electrochemically reacted between electrochemical electrode after generate oxidizing species.
Wherein, the material substrate of the negative electrode of electrochemical treater and anode is titanium, substrate surface be provided with ruthenium, iridium, iron, One or several kinds in rhodium, palladium, platinum, lead, tantalum and its alloy or oxide.Certainly, the present invention is not limited thereto, as long as electric Pole material meets following condition:Redox potential approaches with oxygen evolution reaction potential, as oxygen separates out standard in sour environment Electrode potential is 1.23VRHE, electrode used therein material, which need to be higher than this potential, can just be stabilized.
Wherein, the generation electrode that the corona treatment uses is shaped as flat board, cylinder or cylindric.Generation electrode Surface be insulating materials or nanometer conductive material, such as CNT and zinc oxide nanowire pair.
This method is as follows to the purification process of pollutant in gas:
(1) in electrochemical gas processing, partly soluble first gas molecule or particulate matter will be dissolved filter in the solution Remove;
(2) voltage loaded on electrochemical electrode can make running water or hydrogen peroxide dynamic moisture film produce oxidizing species or Strong oxidizing property intermediate, the reaction that can occur with the pollutant in gas include increasing the affinity of contaminant molecule and water, hair Raw oxidation Decomposition purification, electron transfer reaction form anakmetomeres and metastable state molecule, and addition forms macromolecular;
(3) gas after preliminary purification enters in heating region and handled, and the contaminant molecule for combining microlayer model exists To be degraded in electric field, ionization occurs under electric field and action of plasma and decomposes for anakmetomeres and metastable state molecule, while before Putting the macromolecular that addition is formed in electrochemical reaction can also decompose with Plasma Interaction.
The equipment that the embodiment of the present invention additionally provides pollutant in a kind of processing gas, refer to Fig. 1 and Fig. 2, such as Fig. 1 and Shown in Fig. 2, the equipment includes air channel shell 1, and the air channel shell 1 is divided into electrochemical treatments region and corona treatment area Domain, pending gas enter from the air intake vent of air channel shell, and flow through successively the electrochemical treatments region and the grade from Flowed out after daughter processing region by the air outlet of air channel shell;Wherein:
The electrochemical treatments region is used to carry out the preposition purified treatment of electrochemistry to pending gas;
The plasma treatment zone is used to carry out corona treatment to the gas after the preposition purified treatment of electrochemistry With the pollutant in gas of degrading.
Wherein, more than one group electrochemical electrode pair is provided with electrochemical treatments region, every group of electrochemical electrode is to wrapping Include negative electrode and anode.Multigroup tabular surface modification is provided with for example, electrochemical treatments region is arranged near air intake vent, in it The Ti electrode electrochemical electrode 3 of iridium tantalum alloy, all anodes pass through the first circuit interface 5 after the parallel connection of the first conductive component 4 It is electrically connected with the positive pole of power supply, all negative electrodes pass through second circuit interface 7 and power supply after the parallel connection of the second conductive component 6 Negative pole is electrically connected with.
Plasma treatment zone is provided with more than one group of generation electrode, and every group of generation electrode includes negative electrode and sun Pole.Multigroup flat-plate shape plasma is provided with for example, plasma treatment zone is arranged near air outlet, in it, and electrode occurs 13, its surface is modified by zinc oxide nanowire, and all anodes pass through tertiary circuit interface after the parallel connection of the 3rd conductive component 14 15 are electrically connected with the positive pole of power supply, and all negative electrodes pass through the 4th circuit interface 17 and electricity after the parallel connection of the 4th conductive component 16 The negative pole in source is electrically connected with.
Preferably, the height of tabular electrochemical electrode 3 and the generation electrode of plasma treatment zone Degree is equal with the height of air channel shell 1, is disposed alternately at along the width of air channel shell 1 according to negative electrode, anode outside air channel Corresponding position in shell 1 so that into the gas in air channel shell 1 can by the preposition purified treatment of electrochemistry and Corona treatment.
In a preferred embodiment, the equipment also includes water washing device, and water washing device is arranged in air channel shell 1, by air channel Shell 1 is separated into electrochemical treatments region and plasma treatment zone;Water washing device is used for electrochemical treatments area spray Liquid, dynamic moisture film is formed between the negative electrode and anode in electrochemical treatments region, the solution as the preposition purified treatment of chemistry. Specifically, in one embodiment of the invention, water washing device includes:Water supply line 10, and water supply line 10 is towards electrochemistry The side of processing region is provided with some nozzles 11, forms nozzle array.Water route interface 9 is provided with the top of water washing device, even The water supply line 10 of water washing device is connected to, the air channel shell side of the electrode base of electrochemical treater is provided with discharge outlet 8, is used for Reclaim the solution after electrochemical reaction;Liquid enters in water supply line 10 through water route interface 9, is sprayed by some nozzles 11, in electricity Dynamic moisture film is formed between the negative electrode and anode of chemical treatment region.Wherein, water supply line 10 includes some water pipes, some water pipes Arranged along the short transverse of air channel shell 1, some nozzles 11 are provided with each water pipe;Or water supply line 10 is whole including one Root water pipe, the snakelike arrangement of short transverse of the water pipe along air channel shell 1, some nozzles 11 is provided with each section;So that Obtain can form uniform dynamic moisture film between the negative electrode of tabular electrochemical electrode 3 and anode in short transverse.
Wherein, air channel shell 1 includes an air channel top cover 2, and air channel top cover 2 is provided with some connecting holes, connect for water route, circuit Mouth outside air channel with supplying water, the connection of electric power system.
As the presently preferred embodiments, water washing device also includes the water fender 12 being obliquely installed, and water fender 12 is positioned close to The side of gas ions processing region, such as 45 degree are downwardly inclined to plasma treatment zone side, certainly, the angle of inclination is simultaneously Be not it is unique, can according to circumstances Reasonable adjustment.By setting water fender 12, the water that can be carried to gas is somewhat collected, In order to avoid gas humidity is too high, prevent plasma part from forming excessive excessive drop, to ensure the efficiency of corona treatment And the safety of equipment.
The application method of the equipment of pollutant is in processing gas provided in an embodiment of the present invention:Additional power source passes through circuit Voltage is accessed interface into the negative electrode in electrochemical treatments region and anode forms electric field, and gas enters in electrochemical treatments region, by Water washing device sprays running water or hydrogen peroxide solution forms dynamic moisture film between the electrode in electrochemical treatments region and reduces gas The flow velocity of body, so as to gas and caused oxidizing species or strong oxidizing property intermediate between the electrode in electrochemical treatments region Interact and degrade, activate or be hydrophilic.After gas after preposition processing is by the water fender of water washing device, in plasma Degraded by the highfield direct ionization between plasma-generating electrode in processing region, or occur mutually with the plasma of generation Act on and decomposing, purifying.Gas after processing is discharged by the air outlet of plasma processor.
Using before this equipment, number of electrodes, structure snd size should be selected according to application environment, water washing device be opened, in electricity On the electrode of chemical treatment region and plasma treatment zone after upper on-load voltage respectively, pending gas is introduced.
In order to further be stated to the effect of the present invention, the present invention is by toluene with explanation is compared exemplified by n-hexane It is as follows:
1. the processing of pair toluene
Using the said equipment provided by the invention, running water is used to be passed through about 2000ppm first at air intake vent for solution Benzene gas, it is respectively adopted at the plasma gas processing after electrochemical gas processing, washing, electrochemical treatments and plasma Manage the gas purification mode being combined to handle toluene gas, wherein gas flow rate about 5L/min, electrochemical gas processing Pole plate between voltage between 30V to 40V, between 0.2A to 0.5A, the inter-electrode voltage of corona treatment is electric current Between 20kV to 30kV, electric current is between 2uA to 5uA.Air-out under the conditions of being measured respectively by gas chromatographic analysis technique respectively The gas collection of illustrative plates at mouthful place, corresponding diagram 3 is to Fig. 6 respectively, and abscissa be the time in collection of illustrative plates, and ordinate is gas chromatographicanalyzer gained The gas characteristic response readings signal arrived.The position at peak represents gaseous species information in spectral line, and the area at peak represents the dense of gas Degree.It can be seen from Fig. 3 to Fig. 6 measurement result, after electrochemical gas processing and plasma gas processing are combined, not only The efficiency of plasma gas processing is greatly improved, more effectively avoids the new gas formed in electrochemical treatments Component pollutes.
2. the processing of pair n-hexane
Using the said equipment provided by the invention, running water is used to be passed through about 2000ppm at air intake vent just for solution Hexane gas, plasma gas processing, electrochemical treatments and plasma after electrochemical gas processing, washing is respectively adopted The gas purification mode that processing combines is handled n-hexane gas, wherein gas flow rate about 5L/min, at electrochemical gas Voltage is between 30V to 40V between the pole plate of reason, and between 0.2A to 0.5A, the inter-electrode voltage of corona treatment is electric current Between 20kV to 25kV, electric current is between 2uA to 5uA.Air-out under the conditions of being measured respectively by gas chromatographic analysis technique respectively The gas collection of illustrative plates at mouthful place, distinguishes corresponding diagram 7 to Figure 10, abscissa is the time in collection of illustrative plates, and ordinate is gas chromatographicanalyzer institute Obtained gas characteristic response readings signal.The position at peak represents gaseous species information in spectral line, and the area at peak represents gas Concentration.It can be seen from measurement result, after electrochemical gas processing and plasma gas processing are combined, greatly improve The efficiency of plasma gas processing.
In above-mentioned processing, electrochemical gas processing refers to only accessing voltage the negative electrode and anode in electrochemical treatments region Electric field is formed, starts water washing device, but do not start corona treatment;Plasma gas processing after washing refers to not opening Dynamic electrochemical treatments, only start water washing device and corona treatment;Electrochemical treatments and corona treatment are combined finger It is to start electrochemical treatments, water washing device and corona treatment.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims Scope.

Claims (18)

1. a kind of method of pollutant in processing gas, it is characterised in that this method comprises the following steps:
S1, the preposition purified treatment of electrochemistry is carried out to pending gas;
S2:Corona treatment is carried out to the gas after the preposition purified treatment of electrochemistry with the pollutant in gas of degrading.
2. the method for pollutant in processing gas as claimed in claim 1, it is characterised in that at the preposition purification of electrochemistry Reason at least to:Make part organic gas molecule hydrophilic, form gas-microlayer model mixture.
3. the method for pollutant in processing gas as claimed in claim 2, it is characterised in that the corona treatment is at least To:Gas-microlayer model mixture is set to be ionized and degrade.
4. the method for pollutant in processing gas as claimed in claim 3, it is characterised in that at the preposition purification of electrochemistry Reason also at least to:Remove the soluble pollutant in part;And/or part organic gas molecule is decomposed, form metastable state point Son;And/or make part organic gas molecule activation, form anakmetomeres.
5. the method for pollutant in processing gas as claimed in claim 4, it is characterised in that the corona treatment is also extremely It is few to:Make anakmetomeres and/or metastable state molecule that ionization decomposition occur under electric field and action of plasma.
6. the method for pollutant in the processing gas as described in any one of claim 1 to 5, it is characterised in that the electrochemistry The solution that preposition purified treatment uses for:The dynamic moisture film being injected between the negative electrode of electrochemical treater and anode.
7. the method for pollutant in processing gas as claimed in claim 6, it is characterised in that the raw material of the dynamic moisture film is Running water or hydrogen peroxide solution.
8. the method for pollutant in processing gas as claimed in claim 6, it is characterised in that the material of the negative electrode and anode Substrate is titanium, and substrate surface is provided with a kind of or several in ruthenium, iridium, iron, rhodium, palladium, platinum, lead, tantalum and its alloy or oxide Kind.
9. the method for pollutant in the processing gas as described in any one of claim 1 to 5, it is characterised in that the plasma The generation electrode that body processing uses is shaped as flat board, cylinder or cylindric.
10. the method for pollutant in processing gas as claimed in claim 9, it is characterised in that the surface that electrode occurs For insulating materials or nanometer conductive material.
11. the equipment of pollutant in a kind of processing gas, it is characterised in that including air channel shell, the air channel shell is separated Into electrochemical treatments region and plasma treatment zone, pending gas enters from the air intake vent of air channel shell, and successively The electrochemical treatments region is flowed through with being flowed out behind the plasma treatment zone by the air outlet of air channel shell;Wherein:
The electrochemical treatments region is used to carry out the preposition purified treatment of electrochemistry to pending gas;
The plasma treatment zone is used to carry out corona treatment to the gas after the preposition purified treatment of electrochemistry to drop Solve the pollutant in gas.
12. the equipment of pollutant in processing gas as claimed in claim 11, it is characterised in that the electrochemical treatments region More than one group electrochemical electrode pair is inside provided with, every group of electrochemical electrode is to including negative electrode and anode.
13. the equipment of pollutant in processing gas as claimed in claim 12, it is characterised in that all anodes are led through first It is electrically connected with after electric Components Parallel Connection by the positive pole of the first circuit interface and power supply, all negative electrodes are in parallel through the second conductive component It is electrically connected with afterwards by the negative pole of second circuit interface and power supply.
14. the equipment of pollutant in processing gas as claimed in claim 12, it is characterised in that also including water washing device, institute State water washing device to be arranged in the air channel shell, the air channel shell is separated at electrochemical treatments region and plasma Manage region;The water washing device is used for the electrochemical treatments area spray liquid, the moon in the electrochemical treatments region Dynamic moisture film, the solution as the preposition purified treatment of chemistry are formed between pole and anode.
15. the equipment of pollutant in processing gas as claimed in claim 14, it is characterised in that the water washing device includes: Water supply line, the water supply line are provided with some nozzles towards the side in the electrochemical treatments region, if liquid warp is described Dry nozzle is sprayed, and dynamic moisture film is formed between the negative electrode and anode in the electrochemical treatments region.
16. the equipment of pollutant in the processing gas as described in claims 14 or 15, it is characterised in that the water washing device is also Including the water fender being obliquely installed, the water fender is positioned close to the side of the plasma treatment zone.
17. the equipment of pollutant in processing gas as claimed in claim 11, it is characterised in that the corona treatment area Domain is provided with more than one group of generation electrode, and every group of generation electrode includes negative electrode and anode.
18. the equipment of pollutant in processing gas as claimed in claim 17, it is characterised in that all anodes are led through the 3rd It is electrically connected with after electric Components Parallel Connection by the positive pole of tertiary circuit interface and power supply, all negative electrodes are in parallel through the 4th conductive component It is electrically connected with afterwards by the negative pole of the 4th circuit interface and power supply.
CN201711127756.2A 2017-11-15 2017-11-15 The method and apparatus of pollutant in processing gas CN107694298A (en)

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WO2019096139A1 (en) * 2017-11-15 2019-05-23 上海睿筑环境科技有限公司 Method and apparatus for treating pollutants in gas

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CN203090725U (en) * 2013-01-24 2013-07-31 江苏新阪神太阳能有限公司 Waste gas treatment device
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CN204656315U (en) * 2015-04-07 2015-09-23 季宇锋 A kind of drying tunnel smog and application VOC exhaust gas purification system
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