CN103111168A - Large-air-volume low-concentration plasma exhaust gas treatment device - Google Patents
Large-air-volume low-concentration plasma exhaust gas treatment device Download PDFInfo
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- CN103111168A CN103111168A CN2013100605372A CN201310060537A CN103111168A CN 103111168 A CN103111168 A CN 103111168A CN 2013100605372 A CN2013100605372 A CN 2013100605372A CN 201310060537 A CN201310060537 A CN 201310060537A CN 103111168 A CN103111168 A CN 103111168A
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Abstract
The invention discloses a large-air-volume low-concentration plasma exhaust gas treatment device comprising a plasma shell, wherein an air inlet and an air outlet are arranged on the plasma shell; a plurality of plasma generators are arranged in at least one cross section of the cavity of the plasma shell; the plasma generators in the same cross section are connected with each other; the plasma generators are vertical to the air inlet and comprise insulating bases; air flow uniform grids are connected at the front and rear parts of the bases; a plurality layers of wire electrodes and a plurality of plate electrodes are vertically connected between the left and right plates in the cavities of the bases from top to bottom; the plate electrodes as well as the plate electrodes and the layers of wire electrodes are parallel to each other; each plate electrode is in interleave arrangement with each layer of wire electrodes and has equal space with adjacent wire electrodes; each layer of wire electrodes are uniformly arranged at intervals; each plate electrode and wire electrode are respectively connected with an outgoing wire; and the outgoing wires are respectively connected with the ground terminal and the high voltage terminal of a high voltage alternating current power supply. The large-air-volume low-concentration plasma exhaust gas treatment device disclosed by the invention is capable of obtaining relatively high gas treatment flow, maintaining high-density large-area plasma, discharging in a stable state and improving the treatment efficiency.
Description
Technical field
The present invention relates to a kind of purifier of waste gas, be specifically related to a kind of large-wind-volume low-concentration plasma emission-control equipment.
Background technology
Along with expanding economy, the thing followed is that the poisonous and harmful gaseous contamination problem that produces of the field such as industrial production is also day by day serious.Gaseous contamination mainly comes from the industries such as oil, chemical industry, application, sewage disposal, tobacco.The gaseous contaminant that these industries produce has that flow is large, the characteristics of complicated component, if directly discharging will be to health of human body and atmospheric environment harm.Must carry out the processing of online large flow to these pollutants, make it to reach discharging standards.
Non-thermal plasma trap is that gaseous contaminant is administered the hot spot technology of leading in recent years.Than traditional air purifying process, as firing method, absorption method, bioanalysis, membrane separation process, photocatalytic method etc., plasma technique has the characteristics such as handling process is short, efficient is high, energy consumption is low, secondary pollution is few, applied widely, is considered to a kind of environmental pollution advanced purification technology that has future.Under normal pressure, near the electric field when electric-field intensity inhomogeneous or electrode than electrode between the electric field at other position when much better than, voltage is elevated to a certain degree, near the gas medium electrode can be produced electric discharge phenomena by partial breakdown.The atmospheric plasma discharge form can be divided into corona discharge, glow discharge, dielectric barrier discharge and arc discharge.Due to the restriction that is subject to practical application, corona discharge and dielectric barrier discharge obtain more application aspect master gas.But corona discharge easily forms spark discharge when voltage is higher, in addition the corona discharge strength ratio a little less than, process waste gas efficient lower.And dielectric barrier discharge is owing to there being dielectric barrier, is bottleneck processing gas flow and keeping aspect stable discharging.Require electrode spacing large when throughput is large, so breakdown voltage is high and more difficult acquisition stable discharging.
Summary of the invention
The object of the present invention is to provide a kind of large-wind-volume low-concentration plasma emission-control equipment, it can obtain higher gas treatment flow, can keep the plasma of high-density large-area simultaneously, makes discharge be in stable state, improves treatment effeciency.
to achieve these goals, technical solution of the present invention is: a kind of large-wind-volume low-concentration plasma emission-control equipment, comprising the plasma housing, described plasma housing be provided with into, the gas outlet, be positioned at into, in at least one cross section of plasma housing inner chamber between the gas outlet, several plasma generators are installed, interconnect and fill up this cross section along outer rim between each plasma generator of same cross section, described plasma generator is perpendicular to the air inlet of plasma housing, described plasma generator comprises the rectangular frame pedestal, described pedestal is made by insulating materials, before described pedestal, the back is connected with respectively the airflow uniform distribution grid, be evenly equipped with the grid holes on described airflow uniform distribution grid, the inner chamber of described pedestal is left, vertically be connected with some layers of wire electrode and several battery lead plates between right panel from top to bottom, be parallel to each other between each described battery lead plate and between each battery lead plate and each layer wire electrode, each battery lead plate and each layer wire electrode are crisscross arranged, each described battery lead plate is adjacent that between the wire electrode of layer, spacing equates, the wire electrode that is positioned at same layer is even, the interval arranges, each described battery lead plate is connecting electrode plate lead-out wire respectively, the outer surface of each described battery lead plate is respectively equipped with resistant to elevated temperatures insulating medium layer, each described battery lead plate lead-out wire passes respectively insulating medium layer and is connected with pedestal and is connected with the earth terminal of high-voltage ac power, the outer surface that each described battery lead plate lead-out wire passes the part of pedestal all overlaps fixedly guide pin bushing of insulation, one end of each wire electrode is connecting electrode silk lead-out wire respectively, each wire electrode lead-out wire is connected with the high-pressure side of high-voltage ac power after passing pedestal.
Large-wind-volume low-concentration plasma emission-control equipment of the present invention, wherein vertically connect respectively the insulation balance plate that several are parallel to each other and even interval arranges between each adjacent two battery lead plates, each wire electrode between adjacent two battery lead plates vertically passes respectively the balance plate that respectively insulate.
Large-wind-volume low-concentration plasma emission-control equipment of the present invention, wherein the left and right two ends of each described wire electrode are separately fixed on two hold-down screws, two described hold-down screws are bolted in respectively on the left and right plate of pedestal, connecting electrode silk lead-out wire on one of them hold-down screw.
Large-wind-volume low-concentration plasma emission-control equipment of the present invention, wherein said plasma housing is the box structure of cuboid, its left plate is provided with the air inlet of flaring, its upper surface right part is provided with the gas outlet of convergent, links together by C type channel-section steel and hold-down screw respectively between the pedestal of adjacent described plasma generator and between adjacent pedestal and plasma housing.
Large-wind-volume low-concentration plasma emission-control equipment of the present invention, wherein said plasma housing is provided with manhole.
after adopting such scheme, large-wind-volume low-concentration plasma emission-control equipment of the present invention is connected by air inlet and the waste gas of plasma housing, waste gas is each plasma generator by plasma housing inner chamber all, each battery lead plate lead-out wire of plasma generator is connected with high-pressure side with the earth terminal of high-voltage ac power respectively with each wire electrode lead-out wire, connect high-voltage ac power, under the effect of High Level AC Voltage, produce corona discharge around electrode wire layer between adjacent electrode plates, because for the parallel-plate discharge, can produce higher peripheral electric field under equal applied voltage, therefore the needed discharge breakdown voltage of wire electrode is lower, produce micro discharge around wire electrode, and corona preionization can further reduce the gap breakdown field intensity, insulating medium layer can suppress the formation of arc discharge, thereby in the electrion zone, the stable dielectric impedance corona discharge of Large-Area-Uniform appears, region of discharge produces and is rich in a large number the high energy active particle, when gaseous contaminant evenly enters high voltage discharge field in a large number by the airflow uniform distribution grid, high energy active particle and dusty gas react, reach the purpose of removing pollutant, because the gas flow that enters plasma housing inner chamber is very large, therefore this device can obtain higher gas treatment flow, can keep simultaneously the plasma of high-density large-area, make discharge be in stable state, improve treatment effeciency.
Further beneficial effect of the present invention is: vertically connect the insulation balance plate that several are parallel to each other and even interval arranges between each adjacent two battery lead plates, make each wire electrode between adjacent two battery lead plates vertically pass respectively the balance plate that respectively insulate, design can guarantee that each layer wire electrode is parallel with each battery lead plate on the one hand like this, set up simultaneously the insulation balance plate, help equilibrium to enter the air-flow of plasma generator entrance, high voltage discharge field with plasma is separated into independently several little region of discharges simultaneously, helps to improve the density of plasma.
Further beneficial effect of the present invention is: the left and right two ends of each wire electrode are separately fixed on two hold-down screws, two hold-down screws are bolted in respectively on pedestal, make one of them hold-down screw connecting electrode silk lead-out wire, the installation, fixing of wire electrode and wire electrode lead-out wire is convenient in design like this.
Further beneficial effect of the present invention is: be the box structure of cuboid with the plasma housing design, to link together by C type channel-section steel and hold-down screw respectively between the pedestal of adjacent plasma generator and between adjacent pedestal and plasma housing, design is simple in structure, easy for installation like this.
Further beneficial effect of the present invention is: establishing manhole on the plasma housing, is the plasma generator for convenient maintenance plasma housing inner chamber.
Description of drawings
Fig. 1 is the shape assumption diagram of large-wind-volume low-concentration plasma emission-control equipment of the present invention;
Fig. 2 is the front view of plasma generator uniform in the same cross section of plasma housing inner chamber of the present invention;
Fig. 3 is the top view of plasma generator uniform in the same cross section of plasma housing inner chamber of the present invention;
Fig. 4 is that the A-A of Fig. 2 is to cutaway view;
Fig. 5 is the front view of individual plasma generator of the present invention;
Fig. 6 is that the B-B of Fig. 5 is to cutaway view;
Fig. 7 is the left view of individual plasma generator of the present invention;
Fig. 8 is that the C-C of Fig. 7 is to cutaway view.
Below in conjunction with accompanying drawing, the present invention is described further by embodiment;
The specific embodiment
As shown in Figure 1, large-wind-volume low-concentration plasma emission-control equipment of the present invention comprises plasma housing 1.Plasma housing 1 is the box structure of cuboid.Be processed with the air inlet 2 of flaring on its left plate, its upper plate right part is processed with the gas outlet 3 of convergent, and its header board is processed with manhole 17.
To shown in Figure 4, in the same cross section of plasma housing 1 inner chamber between air inlet 2 and gas outlet 3,3 * 4 plasma generators 4 are installed in conjunction with Fig. 2.Be transversely arranged 3 plasma generators 4,4 plasma generators 4 of longitudinal arrangement.Interconnect and fill up this cross section along outer rim between each plasma generator 4.Plasma generator 4 is perpendicular to the air inlet 2 of plasma housing 1.To shown in Figure 7, individual plasma generator 4 comprises rectangular frame pedestal 5 in conjunction with Fig. 5.Pedestal 5 is made by insulating materials, and it is of a size of 50cm * 30cm.Link together by C type channel-section steel 15 and hold-down screw 16 respectively between the pedestal 5 of adjacent plasma generator 4 and between adjacent pedestal 5 and plasma housing 1.Forward and backward of single pedestal 5 is connected with respectively airflow uniform distribution grid 18, is evenly equipped with the grid holes on airflow uniform distribution grid 18.Vertically be connected with triple electrode silk 6 and four battery lead plates 7 between the left and right plate of the inner chamber of single pedestal 5 from top to bottom.Be parallel to each other between each battery lead plate 7 and between each battery lead plate 7 and each layer wire electrode 6.Each battery lead plate 7 is crisscross arranged with each layer wire electrode 6.The spacing that each battery lead plate 7 is adjacent between the wire electrode 6 of layer equates, this spacing is 10mm.The wire electrode 7 that is positioned at same layer is evenly, the interval arranges, and the spacing between adjacent electrode silk 7 is 6mm, and the diameter of each wire electrode 7 is 1mm.The left end of each battery lead plate 7 is connecting electrode plate lead-out wire 8 respectively.The outer surface of each battery lead plate 7 is respectively equipped with resistant to elevated temperatures insulating medium layer 9, and this insulating medium layer 9 is made by ceramic material.Each battery lead plate lead-out wire 8 is connected with the earth terminal of high-voltage ac power 12 after passing respectively the left plate that insulating medium layer 9 is connected with pedestal.The outer surface that each battery lead plate lead-out wire 8 passes the part of pedestal 5 all overlaps fixedly guide pin bushing 10 of insulation.The left and right two ends of each wire electrode 6 are fixed on two hold-down screws 14 after passing respectively the left and right plate of pedestal 5, two hold-down screws 14 are bolted in respectively on the left and right plate of pedestal 5, connecting electrode silk lead-out wire 11 on left end hold-down screw 14, each wire electrode lead-out wire 11 are connected with the high-pressure side of high-voltage ac power 12 respectively.Vertically connect respectively three between each adjacent two battery lead plates 7 and be parallel to each other and the even insulation balance plate 13 that arranges of interval, each wire electrode 6 between adjacent two battery lead plates 7 vertically passes respectively the balance plate 13 that respectively insulate.
during use, the air inlet 2 of waste gas and plasma housing 1 is connected, high-voltage ac power is connected, waste gas all enters plasma housing 1 inner chamber, and through the airflow uniform distribution grid 18 of each plasma generator 2, even a large amount of high voltage discharge fields that enter, under the effect of High Level AC Voltage, produce corona discharge around 6 layers of wire electrodes between adjacent electrode plates 7, because for battery lead plate 7, the needed discharge voltage of wire electrode 6 is lower, under equal applied voltage than being easier to produce peripheral electric field, produce micro discharge around wire electrode 6, more easily form plasma, thereby produce the corona discharge of Large-Area-Uniform, and corona preionization can reduce the gap breakdown field intensity, the insulating medium layer 9 of battery lead plate 7 outer surfaces can suppress the formation of arc discharge, thereby in the electrion zone, the stable dielectric impedance corona discharge of Large-Area-Uniform appears, region of discharge produces and is rich in a large number the high energy active particle, when gaseous contaminant enters high voltage discharge field, high energy active particle and dusty gas react, reach the purpose of removing pollutant, treated waste gas is discharged through the gas outlet 3 of plasma housing 1.Its concrete course of reaction:
(1) in the plasma generation district, under the effect of high energy particle, can produce strong oxidizing property free radical O, OH etc.;
(2) if the organic molecule that pollutes in waste gas is subject to the high energy particle collision and excites, may make molecular link obtain external energy and rupture, thereby forming little atom or molecule;
(3) through series reaction, the interactions such as the atom of living radical and little group, excitation state, organic molecule, its end product is CO, CO
2, H
2O etc.
Because the gas flow by plasma generator 4 is very large, so this device can obtain higher gas treatment flow, can keep the plasma of high-density large-area simultaneously, making discharge be in stable state, improves treatment effeciency.
Above-mentioned waste gas is after purified treatment, 3 places sample in the gas outlet, according to the HJ/T38-1999 gas chromatography, NMHC and TVOC (TOVC) are carried out sampling determination, check result is pressed the GB16297-1996 discharge standard of air pollutants.
Implementation result is as shown in the table:
The above embodiment is described the preferred embodiment of the present invention; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; various distortion and improvement that the common engineers and technicians in this area make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (5)
1. large-wind-volume low-concentration plasma emission-control equipment, it is characterized in that: comprise plasma housing (1), described plasma housing (1) be provided with into, gas outlet (2, 3), be positioned at into, gas outlet (2, 3) at least one cross section of plasma housing (1) inner chamber between, several plasma generators (4) are installed, be positioned between each plasma generator (4) of same cross section and interconnect and fill up this cross section along outer rim, described plasma generator (4) is perpendicular to the air inlet (2) of plasma housing (1), described plasma generator (4) comprises rectangular frame pedestal (5), described pedestal (5) is made by insulating materials, before described pedestal (5), the back is connected with respectively airflow uniform distribution grid (18), be evenly equipped with the grid holes on described airflow uniform distribution grid (18), the inner chamber of described pedestal (5) is left, vertically be connected with some layers of wire electrode (6) and several battery lead plates (7) between right panel from top to bottom, be parallel to each other between each described battery lead plate (7) and between each battery lead plate (7) and each layer wire electrode (6), each battery lead plate (7) is crisscross arranged with each layer wire electrode (6), each described battery lead plate (7) is adjacent that between the wire electrode (6) of layer, spacing equates, the wire electrode (7) that is positioned at same layer is even, the interval arranges, each described battery lead plate (7) is connecting electrode plate lead-out wire (8) respectively, the outer surface of each described battery lead plate (7) is respectively equipped with resistant to elevated temperatures insulating medium layer (9), each described battery lead plate lead-out wire (8) passes respectively insulating medium layer (9) and is connected 5 with pedestal) be connected with the earth terminal of high-voltage ac power (12) afterwards, the outer surface that each described battery lead plate lead-out wire (8) passes the part of pedestal (5) all overlaps fixedly guide pin bushing (10) of insulation, one end of each wire electrode (6) is connecting electrode silk lead-out wire (11) respectively, each wire electrode lead-out wire (11) is connected with the high-pressure side of high-voltage ac power (12) after passing pedestal (5).
2. large-wind-volume low-concentration plasma emission-control equipment as claimed in claim 1, it is characterized in that: vertically connect respectively the insulation balance plate (13) that several are parallel to each other and even interval arranges between each adjacent two battery lead plates (7), each wire electrode (6) that is positioned between adjacent two battery lead plates (7) vertically passes respectively the balance plate (13) that respectively insulate.
3. large-wind-volume low-concentration plasma emission-control equipment as claimed in claim 1 or 2, it is characterized in that: the left and right two ends of each described wire electrode (6) are separately fixed on two hold-down screws (14), two described hold-down screws (14) are bolted in respectively on the left and right plate of pedestal (5), the upper connecting electrode silk lead-out wire (11) of one of them hold-down screw (14).
4. large-wind-volume low-concentration plasma emission-control equipment as claimed in claim 3, it is characterized in that: described plasma housing (1) is the box structure of cuboid, its left plate is provided with the air inlet (2) of flaring, its upper surface right part is provided with the gas outlet (3) of convergent, links together by C type channel-section steel (15) and hold-down screw (16) respectively between the pedestal (5) of adjacent described plasma generator (4) and between adjacent pedestal (5) and plasma housing (1).
5. large-wind-volume low-concentration plasma emission-control equipment as claimed in claim 4, it is characterized in that: described plasma housing (1) is provided with manhole (17).
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| CN2013100605372A CN103111168A (en) | 2013-02-26 | 2013-02-26 | Large-air-volume low-concentration plasma exhaust gas treatment device |
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| CN2013100605372A CN103111168A (en) | 2013-02-26 | 2013-02-26 | Large-air-volume low-concentration plasma exhaust gas treatment device |
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Cited By (3)
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| CN105013302A (en) * | 2015-08-17 | 2015-11-04 | 上海仲砾环保科技工程有限公司 | Filament plate type high-frequency nano particle peculiar smell removing device |
| CN105148692A (en) * | 2015-08-17 | 2015-12-16 | 上海仲砾环保科技工程有限公司 | Filament plate type oil fume purification equipment adopting high-frequency nano-ions and having odor removal function |
| CN106793435A (en) * | 2016-11-30 | 2017-05-31 | 沙利斌 | A kind of arc discharge plasma generating device for industrial waste gas treatment |
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Application publication date: 20130522 |