CN103341307B - Method and apparatus for removing durable organic pollutants from large flow incinerator exhaust - Google Patents
Method and apparatus for removing durable organic pollutants from large flow incinerator exhaust Download PDFInfo
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- CN103341307B CN103341307B CN201310245783.5A CN201310245783A CN103341307B CN 103341307 B CN103341307 B CN 103341307B CN 201310245783 A CN201310245783 A CN 201310245783A CN 103341307 B CN103341307 B CN 103341307B
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Abstract
The invention discloses a method for removing durable organic pollutants from large flow incinerator exhaust. A large flow incinerator exhaust gas is passed through a multi-stage plasma discharge area until the durable organic pollutants in the exhaust reach an environmental emission standard. The invention also discloses a purification apparatus for removing the durable organic pollutants from the large flow incinerator exhaust. The apparatus comprises a reactor barrel, a gas inlet disposed at the top of the reactor barrel, a gas outlet disposed at the bottom of the reactor barrel, a plurality of plasma discharge devices disposed in the reactor barrel, a high-voltage power supply for supplying the power for the plasma discharge devices and an air compressor for providing ionized gas for the plasma discharge devices. The method and the apparatus are suitable for treating garbage incineration exhaust gas with complex components, have universality for the removal of the durable organic pollutants, and can continuously treat the durable organic pollutants in the large flow incinerator exhaust gas without complex off-line switching operations.
Description
Technical field
The present invention relates to tail gas from incinerator purification disposal technology field, particularly relate to persistence organic pollutant removal methods and device in a kind of large discharge incineration tail gas.
Background technology
To the process of tail gas from incinerator, particularly house refuse, medical waste, the harmlessness disposing of the large discharge tail gas produced in industrial hazard castoff burning process is the major issue of environmental protection industry (epi), at present, (hydrogen chloride is comprised both at home and abroad at the dust removed in garbage incinerating tail gas and sour gas, sulfur dioxide, nitrogen oxide etc.) research and development of aspect achieve reasonable progress, there is reasonable solution, but for the very high bioxin of current attention rate, chlorobenzene, the persistence organic pollutants such as Polychlorinated biphenyls, the main method of activated carbon combined bag-type dust that uses is caught at present, but the method for this mechanical degradation fails to realize the thorough degraded of persistence organic pollutant in incineration flue gas, just chloro pollutant is transferred in solid phase, form new secondary pollution source, cause transfer and the expansion of pollution.In addition; lack effective means targetedly at present for persistence organic pollutant, during a lot of incinerator runs, dioxin exceeds standard, and causes public attention; become environmental protection industry urgent problem, seriously annoying applying of solid waste incineration method of disposal.
At present, plasma method of disposal is mainly used in conventional gas pollutant, as NOx, Sox and volatile organic contaminant (VOC), as benzene, the degraded of toluene etc., these pollutant chemistry structures are simple, comparatively easily degrade and not easily synthesize again, and concentrate on the research report of laboratory room small-sized.Under sliding arc plasma technique may operate in different atmosphere, under different pressures condition, and it is little to have floor space, the feature of easily repacking.And for there is the persistence organic pollutants such as bioxin, chlorobenzene, Polychlorinated biphenyls in the bulky refuse flue gas of refuse burning of large discharge, due to these persistence organic pollutant steady chemical structure, concentration low (trace of ng/m3 grade exists), the plasma degradation efficiency of employing single-stage is low and easily synthesize again under flue gas low-temperature condition again, therefore, the report that application plasma method of disposal carries out persistence organic pollutant in degraded large discharge incineration tail gas is had not yet to see.
Summary of the invention
The invention provides purification method and the device of persistence organic pollutant in a kind of large discharge incineration tail gas, provide the method adopting multiple plasma coupling to dispose to degrade to dispose there is the flue gas of refuse burning of difficult degradation organo-chlorine pollutant, persistence organic pollutant removal efficiency is high, has good degradation efficiency.
A kind of method removing persistence organic pollutant in large discharge tail gas from incinerator, by the flue gas of large discharge incinerator successively by multiple plasma region of discharge, persistence organic pollutant decomposes under action of plasma, concentration progressively reduces, until gas cleaning is complete, namely in tail gas, persistence organic pollutant concentration reaches strict environmental emission standard.
The present invention carries out plasma discharge treatment by adopting multistage, multiple plasma to incineration flue gas, ensure that the degradation rate of pollutant in flue gas, can realize effectively removing of persistence organic pollutant in incineration tail gas.
Remove a purifier for persistence organic pollutant in large discharge tail gas from incinerator, comprise reactor shell, be located at reactor shell top air inlet, be located at reactor shell bottom gas outlet, be positioned at reactor shell multiple plasma discharge apparatus, for the high voltage source of powering to plasma discharge apparatus and for providing the air compressor of ionized gas to plasma discharge apparatus.
In large discharge incineration tail gas provided by the invention, the purifier of persistence organic pollutant is provided with multistage, multiple plasma discharge apparatus in reactor shell, after incineration flue gas enters reactor by the air inlet of cylinder top, plasma treatment will be carried out successively through multiple plasma electric discharge device, the noxious pollutant that can effectively degrade in flue gas, realizes the purification of flue gas.
Preferably, the sidewall of described reactor shell can arrange observation thief hatch, for the clean-up effect of sample detecting apparatus of the present invention to flue gas.
Preferably, described reactor shell is cylinder.
Preferably, described multiple plasma discharge apparatus, along reactor shell axially equidistantly distribution, can improve the purification efficiency of device.
Preferably, the every one-level of described plasma discharge apparatus is made up of multiple reactor ring, and multiple reactor ring is uniformly distributed along reactor shell radial direction in concentric circles.And reactor ring interlaced arrangement between the superior and the subordinate, this interlaced arrangement, can ensure that flue gas is by multiple plasma electric discharge device, makes the persistence organic pollutant in tail gas rapidly by the process of multiple reactor ring.
Preferably, described reactor ring is distributed with some group reaction electrodes, every group reaction electrode is made up of two panels blade type electrode slice.Further preferably, the spacing of described two panels blade type electrode slice is 2-4mm.
Preferably, described every group reaction electrode is equipped with two for the insulation fixed cover of fixed electrode film, can ensure fixedly securing of reaction electrode.
Described blade type electrode slice is also provided with the fin vertical with blade, and the width of preferred fin is 3-10mm, and fin can make ionized space form certain closed interval, ensures the ionization effect of flue gas.
Preferably, the top of described reactor ring is provided with driving compression ring, drives compression ring above the region of discharge of every group reaction electrode, to be equipped with one for spraying compressed-air actuated driving nozzle, drives nozzle by tubes connection air compressor.
Preferably, the nozzle diameter of described driving nozzle is 1-3mm.
Compared with prior art, the invention has the beneficial effects as follows:
(1) the present invention is applicable to the purified treatment of the persistence organic pollutant in the incineration tail gas of complicated components, has generality to the removal of pollutant;
(2) the present invention can on-line continuous process incineration flue gas, does not need to carry out the complex operations such as off-line or intermittent switching, simplifies pipe-line system;
(3) plant area area provided by the invention is little, easily utilizes existing pipeline to transform, and Operation and Maintenance is convenient, and easily realizes Automated condtrol, and disposal efficiency is high;
(4) the present invention does not need to add the running stores such as other additives, and can't cause the metastasis and extension of pollutant, cause secondary pollution, technological process is simple and reliable.
(5) the present invention adopts plasma effectively to decompose persistence organic pollutant, realizes the thoroughly innoxious of persistence organic pollutant in tail gas, and the physical absorption transfer for routine has obvious superiority.
Accompanying drawing explanation
Fig. 1 is the structural representation of the purifier removing large discharge incineration tail gas persistence organic pollutant in the embodiment of the present invention;
Fig. 2 is the top view of the purifier removing large discharge incineration tail gas persistence organic pollutant in the embodiment of the present invention;
Fig. 3 removes the partial enlarged drawing that large discharge burns the purifier of incineration tail gas persistence organic pollutant in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figures 1 to 3, present embodiment discloses a kind of purifier removing large discharge incineration tail gas persistence organic pollutant, this device is by reactor shell 3, form along the equally distributed some grades of plasma discharge apparatus 4 of the inner axis of reactor shell 3, the high voltage source 12 being located at reactor shell 3 outside and air compressor 13.
Wherein, reactor shell 3 is the cylinder that carbon steel and flame-proof thermal insulation material and anti-corrosion material are made, the top of reactor shell 3 is provided with smoke air inlet 5, the bottom of reactor shell 3 is provided with flue gas gas outlet 1, the sidewall of reactor shell 3 is provided with and observes thief hatch 2, for carrying out sample analysis to flue gas.
As shown in Figure 2, plasma discharge apparatus 4 is made up of multiple reactor ring, and multiple reactor ring is uniformly distributed along reactor shell radial direction in concentric circles, reactor ring interlaced arrangement between the superior and the subordinate.
As shown in Figure 3, each reactor ring is evenly distributed with some group reaction electrodes, every group reaction electrode is made up of two panels blade type electrode slice 7, the material of blade type electrode slice 7 is stainless steel, blade type electrode slice 7 is connected with high voltage source 12 and carries out exoelectrical reaction, the spacing of two panels blade type electrode slice 7 is 2-4mm, and arcing excites place 6.
Blade type electrode slice 7 is also provided with current stabilization fin 8, and every group reaction electrode is equipped with two insulation fixed covers 10 for fixed electrode film.Insulation fixed cover 10 plays the effect of fixing support blade type electrode slice 7, and plays insulation protection effect.
The top of each reactor ring is equipped with the driving compression ring 11 be made up of steel pipe, and drive compression ring 11 above the region of discharge of every group reaction electrode, to be equipped with one for spraying compressed-air actuated driving nozzle 9, the nozzle diameter driving nozzle 9 is 1-3mm.Compression ring 11 is driven to use Compressed Gas by tubes connection air compressor 13.
The operation logic of the device in the present embodiment is as follows: reactor connects the high voltage source 12 of 10KV through High-Voltage Insulation electric wire, compressed air is sprayed at a high speed from driving nozzle 9 via driving compression ring 11 by air compressor 13, drive the arc motion at arc excitation place 6, form stable active region, and produce the active particle that can destroy organo-chlorine pollutant.
Large discharge incineration flue gas enters reactor shell 3 from smoke air inlet 5, passes through several plasma discharge apparatus 4 successively, under the direct and indirect effect of active particle, is effectively purified disposal, then discharge through flue gas gas outlet 1.
Adopt the present embodiment device to large discharge incineration tail gas carry out process tests, process of the test and result as follows:
For the large discharge flue gas that incinerator produces, at this purifier of tail flue gas pipe arrangement, disposed by purification.For purifier arrival end and outlet section collected specimens respectively, with the detergent power of evaluating apparatus.Device mainly for as if persistence organic pollutant---the bioxin of pole difficult degradation process.
The result of the test of Yan gas Zhong bioxin purification
Note: Biao Zhong unit is ng I-TEQ/m
3; ND. be lower than detectability: 0.0001ng I-TEQ/m
3.
In incineration flue gas, bioxin initial concentration is 0.2633ng I-TEQ/m
3with 0.2071ng I-TEQ/m
3, difference is caused by fluctuation of operating conditions, and dispose through purifier, Yan gas Zhong bioxin concentration significantly decreases, and twice test Yan gas Zhong bioxin concentration is all lower than 0.1ng I-TEQ/m
3, reach discharging standards.The total degradation rate of Yan gas Zhong bioxin is 79.32% and 75.24%, and achieve the efficient degradation of You Du bioxin, device has good effect.
Claims (6)
1. one kind removes the purifier of persistence organic pollutant in large discharge tail gas from incinerator, it is characterized in that, comprise reactor shell, be located at reactor shell top air inlet, be located at reactor shell bottom gas outlet, be positioned at reactor shell multiple plasma discharge apparatus, for the high voltage source of powering to plasma discharge apparatus and for providing the air compressor of ionized gas to plasma discharge apparatus;
Every one-level of described plasma discharge apparatus is made up of multiple reactor ring, and multiple reactor ring is uniformly distributed along reactor shell radial direction in concentric circles;
The reactor ring interlaced arrangement between the superior and the subordinate of described plasma discharge apparatus;
Described reactor ring is evenly distributed with some group reaction electrodes, and every group reaction electrode is made up of two panels blade type electrode slice.
2. remove the purifier of persistence organic pollutant in large discharge tail gas from incinerator as claimed in claim 1, it is characterized in that, described multiple plasma discharge apparatus are along reactor shell axially equidistantly distribution.
3. remove the purifier of persistence organic pollutant in large discharge tail gas from incinerator as claimed in claim 1, it is characterized in that, the spacing of described two panels blade type electrode slice is 2-4mm.
4. remove the purifier of persistence organic pollutant in large discharge tail gas from incinerator as claimed in claim 1, it is characterized in that, described every group reaction electrode is equipped with two insulation fixed covers for fixed electrode film.
5. remove the purifier of persistence organic pollutant in large discharge tail gas from incinerator as claimed in claim 1, it is characterized in that, the top of described reactor ring is provided with driving compression ring, drives compression ring above the region of discharge of every group reaction electrode, to be equipped with one for spraying compressed-air actuated driving nozzle.
6. remove the purifier of persistence organic pollutant in large discharge tail gas from incinerator as claimed in claim 5, it is characterized in that, the nozzle diameter of described driving nozzle is 1-3mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310245783.5A CN103341307B (en) | 2013-06-19 | 2013-06-19 | Method and apparatus for removing durable organic pollutants from large flow incinerator exhaust |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310245783.5A CN103341307B (en) | 2013-06-19 | 2013-06-19 | Method and apparatus for removing durable organic pollutants from large flow incinerator exhaust |
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| CN103341307A CN103341307A (en) | 2013-10-09 |
| CN103341307B true CN103341307B (en) | 2015-06-17 |
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| CN106925086A (en) * | 2017-04-11 | 2017-07-07 | 南京永研电子有限责任公司 | A kind of organic exhaust gas plasma treatment appts and processing method |
| CN111320134B (en) * | 2018-12-17 | 2023-03-21 | 中国科学院大连化学物理研究所 | Fuel reaction device for producing hydrogen |
| CN109600899A (en) * | 2019-01-11 | 2019-04-09 | 合肥中科远望环保科技有限公司 | A kind of oxygen flame compound plasma torch |
Citations (4)
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|---|---|---|---|---|
| DE19635231A1 (en) * | 1996-08-30 | 1998-03-05 | Siemens Ag | Diesel exhaust gas purification unit combining high-frequency silent plasma discharge and catalytic action |
| US6354903B1 (en) * | 1999-06-29 | 2002-03-12 | Delphi Technologies, Inc. | Method of manufacture of a plasma reactor with curved shape for treating auto emissions |
| CN2672046Y (en) * | 2004-01-16 | 2005-01-19 | 浙江大学 | Slide arc discharge plasma organic waste water treating device |
| CN102500126A (en) * | 2011-12-11 | 2012-06-20 | 浙江大学 | Method and device for purifying high-temperature smoke containing persistent organic pollutants |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006130391A (en) * | 2004-11-04 | 2006-05-25 | Showa Aircraft Ind Co Ltd | Plasma reactor for gas treatment |
| JP2007069115A (en) * | 2005-09-06 | 2007-03-22 | Canon Inc | Gas processing apparatus and cartridge for gas processing |
| WO2009008525A1 (en) * | 2007-07-12 | 2009-01-15 | Imagineering, Inc. | Exhaust gas substance purifier |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19635231A1 (en) * | 1996-08-30 | 1998-03-05 | Siemens Ag | Diesel exhaust gas purification unit combining high-frequency silent plasma discharge and catalytic action |
| US6354903B1 (en) * | 1999-06-29 | 2002-03-12 | Delphi Technologies, Inc. | Method of manufacture of a plasma reactor with curved shape for treating auto emissions |
| CN2672046Y (en) * | 2004-01-16 | 2005-01-19 | 浙江大学 | Slide arc discharge plasma organic waste water treating device |
| CN102500126A (en) * | 2011-12-11 | 2012-06-20 | 浙江大学 | Method and device for purifying high-temperature smoke containing persistent organic pollutants |
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