CN103341307A - 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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- CN103341307A CN103341307A CN2013102457835A CN201310245783A CN103341307A CN 103341307 A CN103341307 A CN 103341307A CN 2013102457835 A CN2013102457835 A CN 2013102457835A CN 201310245783 A CN201310245783 A CN 201310245783A CN 103341307 A CN103341307 A CN 103341307A
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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 and purify the disposal technology field, relate in particular to persistence organic pollutant removal methods and device in a kind of big flow incineration tail gas.
Background technology
Processing to tail gas from incinerator, house refuse particularly, medical waste, the harmlessness disposing of the big flow tail gas that produces in the industrial hazard castoff burning process is the major issue of environmental protection industry (epi), at present, dust and sour gas in removing garbage incinerating tail gas (comprises hydrogen chloride both at home and abroad, sulfur dioxide, nitrogen oxide etc.) research and development of aspect have obtained reasonable progress, reasonable solution has been arranged, but at the very high De bioxin of present attention rate, chlorobenzene, persistence organic pollutants such as Polychlorinated biphenyls, the main method of activated carbon combined bag-type dust of using is caught at present, but the method for this mechanical degradation fails to realize the thorough degraded of persistence organic pollutant in the incineration flue gas, just the chloro pollutant is transferred in the solid phase, form new secondary pollution source, cause transfer and the expansion of polluting.In addition; lack effective means targetedly at present at persistence organic pollutant, the dioxin discharging in service of a lot of incinerators exceeds standard, and causes public attention; become environmental protection industry urgent problem, seriously perplexing applying of solid waste incineration method of disposal.
At present, the plasma method of disposal is mainly used in the conventional gas pollutant, as NOx, Sox and volatile organic contaminant (VOC), as benzene, the degraded of toluene etc., these pollutant chemistries are simple in structure, and easily degraded and be difficult for again syntheticly and concentrates on the research report of laboratory miniaturization.The sliding arc plasma technique may operate under the different atmosphere, under the different pressures condition, and it is little to have floor space, easily the characteristics of repacking.And there are persistence organic pollutants such as De bioxin, chlorobenzene, Polychlorinated biphenyls in the bulky refuse flue gas of refuse burning for big flow, because these persistence organic pollutant steady chemical structure, concentration low (trace of ng/m3 grade exists), adopt the plasma degradation efficient of single-stage low and synthetic more easily again under the flue gas low-temperature condition, therefore, have not yet to see and use the degrade report of persistence organic pollutant in the big flow incineration tail gas of plasma method of disposal.
Summary of the invention
The invention provides purification method and the device of persistence organic pollutant in a kind of big flow incineration tail gas, provide the method that adopts the multiple plasma coupling to dispose to degrade and disposed the flue gas of refuse burning with difficult degradation organo-chlorine pollutant, persistence organic pollutant removal efficiency height has good degradation efficiency.
A kind of method that removes persistence organic pollutant in the big flow tail gas from incinerator, the flue gas of big flow incinerator is passed through the multiple plasma region of discharge successively, persistence organic pollutant decomposes under action of plasma, concentration progressively reduces, complete until gas cleaning, namely persistence organic pollutant concentration reaches strict environmental emission standard in the tail gas.
Multistage by adopting, a plurality of plasma of the present invention carries out plasma discharge treatment to incineration flue gas, has guaranteed the degradation rate of pollutant in the flue gas, can realize effectively removing of persistence organic pollutant in the incineration tail gas.
A kind of purifier that removes persistence organic pollutant in the big flow tail gas from incinerator, comprise reactor shell, be located at the reactor shell top air inlet, be located at the reactor shell bottom the gas outlet, be positioned at reactor shell a plurality of plasma discharge apparatus, be used for to the high voltage source of plasma discharge apparatus power supply and be used for providing the air compressor of ionized gas to plasma discharge apparatus.
The purifier of persistence organic pollutant is provided with multistage, a plurality of plasma discharge apparatus in the big flow incineration tail gas provided by the invention in reactor shell, after incineration flue gas enters reactor by the air inlet of cylinder top, to carry out plasma treatment through the multiple plasma electric discharge device successively, can effectively degrade noxious pollutant in the flue gas is realized the purification of flue gas.
Preferably, on the sidewall of described reactor shell the observation thief hatch can be set, be used for sample detecting apparatus of the present invention to the clean-up effect of flue gas.
Preferably, described reactor shell is cylinder.
Preferably, described a plurality of plasma discharge apparatus axially equidistantly distribute along reactor shell, can improve the purification efficiency of device.
Preferably, each level of described plasma discharge apparatus is made up of a plurality of reactor rings, and a plurality of reactor rings radially are concentric circles along reactor shell and evenly distribute.And reactor ring interlaced arrangement between the superior and the subordinate, this interlaced arrangement can guarantee that flue gas can pass through the multiple plasma electric discharge device, and the persistence organic pollutant in the tail gas is handled by a plurality of reactor rings rapidly.
Preferably, be distributed with some group reaction electrodes on the described reactor ring, every group reaction electrode is made up of two blade type electrode slices.Further preferred, the spacing of described two blade type electrode slices is 2-4mm.
Preferably, described every group reaction electrode is equipped with two insulation fixed covers that are used for fixed electrode film, can guarantee fixedly securing of reaction electrode.
Also be provided with the fin vertical with blade on the described blade type electrode slice, the width of preferred fin is 3-10mm, and fin can make ionized space form certain closed interval, guarantees the ionization effect of flue gas.
Preferably, the top of described reactor ring is provided with the driving compression ring, drives compression ring and is equipped with one for spraying compressed-air actuated driving nozzle above the region of discharge of every group reaction electrode, drives nozzle and connects air compressor by conduit.
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 component complexity, and the removal of pollutant is had generality;
(2) the present invention can on-line continuous handle incineration flue gas, does not need to carry out complex operations such as off-line or intermittent switching, has simplified 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 automation control, disposal efficiency height;
(4) the present invention does not need to add running stores such as other additives, can't cause transfer and the diffusion of pollutant, causes secondary pollution, and technological process is simple and reliable.
(5) the present invention adopts plasma effectively to decompose persistence organic pollutant, and persistence organic pollutant is thoroughly innoxious in the realization tail gas, shifts for the physical absorption of routine to have obvious superiority.
Description of drawings
Fig. 1 is for removing the structural representation of the purifier of big flow incineration tail gas persistence organic pollutant in the embodiment of the invention;
Fig. 2 is for removing the vertical view of the purifier of big flow incineration tail gas persistence organic pollutant in the embodiment of the invention;
Fig. 3 is for removing the partial enlarged drawing that big flow burns the purifier of incineration tail gas persistence organic pollutant in the embodiment of the invention.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing.
Shown in Fig. 1～3, present embodiment discloses a kind of purifier that removes big flow incineration tail gas persistence organic pollutant, and this device is by reactor shell 3, form along the equally distributed some grades of plasma discharge apparatus 4 of reactor shell 3 inner axis, the high voltage source 12 of being located at reactor shell 3 outsides and air compressor 13.
Wherein, the cylinder that reactor shell 3 is made for carbon steel and flame-proof thermal insulation material and anti-corrosion material, the sidewall that the bottom that the top of reactor shell 3 is provided with smoke air inlet 5, reactor shell 3 is provided with flue gas gas outlet 1, reactor shell 3 is provided with observes thief hatch 2, is used for flue gas is carried out sample analysis.
As shown in Figure 2, plasma discharge apparatus 4 is made up of a plurality of reactor rings, and a plurality of reactor rings radially are concentric circles along reactor shell and evenly distribute, reactor ring interlaced arrangement between the superior and the subordinate.
As shown in Figure 3, be evenly distributed with some group reaction electrodes on each reactor ring, every group reaction electrode is made up of two blade type electrode slices 7, the material of blade type electrode slice 7 is stainless steel, blade type electrode slice 7 links to each other with high voltage source 12 and carries out exoelectrical reaction, the spacing of two blade type electrode slices 7 is 2-4mm, and arcing excites place 6.
Also be provided with current stabilization fin 8 on the blade type electrode slice 7, every group reaction electrode is equipped with two insulation fixed covers 10 that are used for fixed electrode film.Insulation fixed cover 10 plays the fixedly effect of support blade type electrode slice 7, and plays the insulation protection effect.
The top of each reactor ring is equipped with the driving compression ring of being made by steel pipe 11, drives compression ring 11 and is equipped with one for spraying compressed-air actuated driving nozzle 9 above the region of discharge of every group reaction electrode, and the nozzle diameter that drives nozzle 9 is 1-3mm.Drive compression ring 11 and connect air compressor 13 use Compressed Gas by conduit.
The operation logic of the device in the present embodiment is as follows: reactor connects the high voltage source 12 of 10KV through the 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.
Big flow incineration flue gas enters the reactor shell 3 from smoke air inlet 5, passes through several plasma discharge apparatus 4 successively, under the direct and indirectly-acting of active particle, is effectively purified disposal, discharges through flue gas gas outlet 1 then.
Adopt the device of present embodiment that big flow incineration tail gas is carried out Processing Test, process of the test and result are as follows:
At the big flow flue gas that incinerator produces, at this purifier of tail flue gas pipe arrangement, dispose by purifying.At purifier arrival end and outlet section difference collected specimens, with the detergent power of evaluating apparatus.Device be primarily aimed to as if persistence organic pollutant---the bioxin handled of utmost point difficult degradation.
The result of the test that flue gas Zhong bioxin purifies
Annotate: unit is ng I-TEQ/m in the table
3ND. for being lower than detectability: 0.0001ng I-TEQ/m
3
De bioxin initial concentration is 0.2633ng I-TEQ/m in the incineration flue gas
3With 0.2071ng I-TEQ/m
3, difference is caused by fluctuation of operating conditions, disposes through purifier, and flue gas Zhong bioxin concentration significantly decreases, and twice test flue gas Zhong bioxin concentration all is lower than 0.1ng I-TEQ/m
3, reach discharging standards.The total degradation rate of flue gas Zhong bioxin is 79.32% and 75.24%, has realized the efficient degradation of poisonous bioxin, and device has good effect.
Claims (10)
1. a method that removes persistence organic pollutant in the big flow tail gas from incinerator is characterized in that, may further comprise the steps:
Big flow incineration flue gas is successively by the multiple plasma region of discharge, complete until gas cleaning.
2. purifier that removes persistence organic pollutant in the big flow tail gas from incinerator, it is characterized in that, comprise reactor shell, be located at the reactor shell top air inlet, be located at the reactor shell bottom the gas outlet, be positioned at reactor shell a plurality of plasma discharge apparatus, be used for to the high voltage source of plasma discharge apparatus power supply and be used for providing the air compressor of ionized gas to plasma discharge apparatus.
3. the purifier that removes persistence organic pollutant in the big flow tail gas from incinerator as claimed in claim 2 is characterized in that, described a plurality of plasma discharge apparatus axially equidistantly distribute along reactor shell.
4. as claim 2 or the 3 described purifiers that remove persistence organic pollutant in the big flow tail gas from incinerator, it is characterized in that, each level of described plasma discharge apparatus is made up of a plurality of reactor rings, and a plurality of reactor rings radially are concentric circles along reactor shell and evenly distribute.
5. big flow incineration flue gas device as claimed in claim 4 is characterized in that, the reactor ring interlaced arrangement between the superior and the subordinate of described plasma discharge apparatus.
6. the purifier that removes persistence organic pollutant in the big flow tail gas from incinerator as claimed in claim 4 is characterized in that, is evenly distributed with some group reaction electrodes on the described reactor ring, and every group reaction electrode is made up of two blade type electrode slices.
7. the purifier that removes persistence organic pollutant in the big flow tail gas from incinerator as claimed in claim 6 is characterized in that, the spacing of described two blade type electrode slices is 2-4mm.
8. the purifier that removes persistence organic pollutant in the big flow tail gas from incinerator as claimed in claim 6 is characterized in that, described every group reaction electrode is equipped with two insulation fixed covers that are used for fixed electrode film.
9. the purifier that removes persistence organic pollutant in the big flow tail gas from incinerator as claimed in claim 6, it is characterized in that, the top of described reactor ring is provided with the driving compression ring, drives compression ring and is equipped with one for spraying compressed-air actuated driving nozzle above the region of discharge of every group reaction electrode.
10. the purifier that removes persistence organic pollutant in the big flow tail gas from incinerator as claimed in claim 9 is characterized in that, the nozzle diameter of described driving nozzle is 1-3mm.
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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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| 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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| CN103341307B CN103341307B (en) | 2015-06-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN111320134A (en) * | 2018-12-17 | 2020-06-23 | 中国科学院大连化学物理研究所 | Fuel reaction device for producing hydrogen |
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| 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 |
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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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN111320134A (en) * | 2018-12-17 | 2020-06-23 | 中国科学院大连化学物理研究所 | Fuel reaction device for producing hydrogen |
| 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 |
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| CN103341307B (en) | 2015-06-17 |
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