CN112177709A - Square electrode low-temperature plasma and wood fiber combined tail gas treatment device - Google Patents
Square electrode low-temperature plasma and wood fiber combined tail gas treatment device Download PDFInfo
- Publication number
- CN112177709A CN112177709A CN201910583423.3A CN201910583423A CN112177709A CN 112177709 A CN112177709 A CN 112177709A CN 201910583423 A CN201910583423 A CN 201910583423A CN 112177709 A CN112177709 A CN 112177709A
- Authority
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- China
- Prior art keywords
- wood fiber
- tail gas
- temperature
- filter element
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920002522 Wood fibre Polymers 0.000 title claims abstract description 27
- 239000002025 wood fiber Substances 0.000 title claims abstract description 27
- 238000000746 purification Methods 0.000 claims abstract description 7
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000001179 sorption measurement Methods 0.000 abstract description 3
- 238000006479 redox reaction Methods 0.000 abstract description 2
- 210000002381 plasma Anatomy 0.000 abstract 6
- 230000004888 barrier function Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 17
- 229920001971 elastomer Polymers 0.000 description 14
- 239000005060 rubber Substances 0.000 description 14
- 238000007789 sealing Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- ODUCDPQEXGNKDN-UHFFFAOYSA-N Nitrogen oxide(NO) Natural products O=N ODUCDPQEXGNKDN-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000019391 nitrogen oxide Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/01—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust by means of electric or electrostatic separators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
- F01N3/0226—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being fibrous
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/14—Nitrogen oxides
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention relates to a block-shaped electrode low-temperature plasma and wood fiber coordinated tail gas treatment device, which is a device for combining a plasma generation device and a wood fiber filter element together, wherein a filter body is formed by wrapping wood fibers with a high-temperature-resistant polytetrafluoroethylene net to form the wood fiber filter element, the plasma generation device adopts a dielectric barrier discharge technology, after a high-voltage electrode is electrified, plasmas are generated under the condition that the wood fiber filter element is taken as a medium, the device is provided with two plasma generation areas, tail gas of a diesel engine enters the device, and the low-temperature plasmas and NO in the diesel engine are generated in a first reaction areaXCarrying out complex oxidation-reduction reaction with PM to generate N2And CO2The wood fiber has certain adsorption capacity to particulate matters and unburned oil products, and the gas which is not purified can continue to be in the second placeThe same reaction is carried out in the reaction zone, so that the purification efficiency is greatly improved.
Description
The technical field is as follows:
the invention belongs to a diesel engine tail gas nitrogenOxide (NO)X) And a soot Particle (PM) treatment device which is arranged at the rear end of the silencer of the diesel engine close to the tail pipe and is used for treating NO in the tail gas of the diesel engineXAnd PM.
Background art:
with the rapid development of the transportation industry in China, transportation vehicles powered by diesel engines are widely applied, but the pollution of the diesel engines to the environment is also concerned by people. The tail gas of the diesel engine mainly comprises incompletely combusted oil products, carbon black particulate matters, nitrogen oxides and the like, and the traditional tail gas treatment method is not ideal for the purification effect of the diesel engine. Therefore, researchers have never abandoned the research on the purification of diesel engine exhaust gas, and the methods for purifying diesel engine exhaust gas at present include an activated carbon adsorption method, a plasma method, a catalytic oxidation method, and the like, but these methods have problems of a small purification amount, a large amount of generated by-products, low efficiency, and the like. The low-temperature plasma and wood fiber technology can well solve the problems, and meanwhile, the technology is convenient to operate and low in cost, so that the technology has a better prospect in the aspect of diesel engine exhaust gas treatment. The research is a brand-new purifying device designed on the basis of the purifying mechanism of the low-temperature plasma and wood fiber technology.
The invention content is as follows:
the square electrode low-temperature plasma and wood fiber coordinated tail gas treatment device comprises a plasma generation device and a square wood fiber filter element. A high-voltage electrode plate is fixed on a fixing plate at the upper part of the plasma generating device, a lead is connected to a fixed end, the lead penetrates through sealing rubber, then the sealing rubber is tightly attached to the upper part of the fixing plate and then embedded in an upper shell 3, two square wood fiber filter elements are respectively attached to the high-voltage electrode plate at the lower part of the plasma generating device, then the high-voltage electrode plate which is attached with wood fibers is fixed on the fixing plate, the lead is connected to the fixed end, the lead penetrates through the sealing rubber, then the sealing rubber is tightly attached to the lower part of the fixing plate, and then the lead is embedded in a lower shell 10. The square wood fiber filter element is made of wood fiber wrapped by high-temperature-resistant polytetrafluoroethylene net. After the high-voltage electrode is electrified, the high-voltage electrode is generated under the condition that the wood fiber filter element is used as a mediumPlasma, two plasma generating regions, diesel engine tail gas entering the device, low temperature plasma and NO in the diesel engine in the first reaction regionXCarrying out complex oxidation-reduction reaction with PM to generate N2And CO2And the wood fiber has certain adsorption capacity to particulate matters and unburned oil products, and the gas which is not purified can continue to carry out the same reaction in a second reaction zone, so that the purification efficiency is greatly improved.
Description of the drawings:
FIG. 1: the structure schematic diagram of the block-shaped electrode low-temperature plasma and wood fiber tail gas treatment device. 1 high-voltage positive wire, 2 insulating plugs, 3 upper shells, 4 sealing rubbers, 5 high-voltage electrode plates, 6 fixing plates, 7 air inlets, 8 flanges, 9 insulating rubbers, 10 lower shells, 11 high-voltage negative wires, 12 square wood fiber filter cores and 13 air outlets.
FIG. 2: A-A section view.
The specific implementation mode is as follows:
a low-temperature plasma of a square electrode is cooperated with a wood fiber tail gas treatment device, a high-voltage electrode plate 5 with the length of 250mm, the width of 10mm and the height of 80mm is fixed in the middle of a fixing plate 6, a high-voltage positive electrode lead 1 is connected to a fixed end, the lead penetrates through a sealing rubber 4, the sealing rubber is tightly attached to the upper portion of the fixing plate, then the sealing rubber and the fixing plate are embedded in an upper shell 3 which is subjected to insulation treatment, and an insulating rubber 9 with the thickness of 5mm is adhered to the periphery of an inner cavity of the. Wrapping long wood fibers with the thickness of 0.05-1mm, the width of 1-2mm and the length of 30-50mm with high-temperature resistant polytetrafluoroethylene to prepare two square wood fiber filter elements 12 with the length of 250mm, the width of 10mm and the height of 40mm, respectively pasting the filter elements on the inner sides of the other two high-voltage electrode plates, ensuring that the upper surface of the wood fiber filter element is flush with the end surfaces of the high-voltage electrode plates during pasting, respectively fixing the filter elements at positions 25mm away from the two sides of the central line on the other fixing plate, connecting a high-voltage negative electrode lead 11 to a fixed end, tightly pasting sealing rubber and the lower part of the fixing plate after the lead penetrates through the sealing rubber, then inlaying the sealing rubber and the fixing plate in a lower shell 10 subjected to insulation treatment, and pasting insulating rubber with the thickness of 5. When the upper part and the lower part of the plasma generating device are connected, the electrode plate at the upper part is firstly inserted between the two wood fiber filter elements 13 at the lower part, and then the upper part and the lower part are connected together through the flange 8.
And tail gas enters the device from the gas inlet, and is subjected to chemical reaction with the generated low-temperature plasma, and finally is discharged from the gas outlet. By double-layer purification reaction, NO in the tail gas of the diesel engine can be generatedXAnd the PM content is greatly reduced.
Claims (1)
1. Square electrode low temperature plasma cooperates wood fiber tail gas processing apparatus, characterized by: it comprises a square filter body and a plasma generating device; the filter body is made of wood fiber wrapped by high-temperature-resistant polytetrafluoroethylene; the plasma generating device consists of three square high-voltage electrodes and a filter body; the entire purification apparatus is placed in a region where the temperature of the exhaust system is low.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910583423.3A CN112177709A (en) | 2019-07-01 | 2019-07-01 | Square electrode low-temperature plasma and wood fiber combined tail gas treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910583423.3A CN112177709A (en) | 2019-07-01 | 2019-07-01 | Square electrode low-temperature plasma and wood fiber combined tail gas treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112177709A true CN112177709A (en) | 2021-01-05 |
Family
ID=73915733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910583423.3A Pending CN112177709A (en) | 2019-07-01 | 2019-07-01 | Square electrode low-temperature plasma and wood fiber combined tail gas treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112177709A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219338A (en) * | 2007-09-27 | 2008-07-16 | 深圳先进技术研究院 | Automobile tail gas purifier of low-temperature plasma body |
| CN102230410A (en) * | 2011-06-24 | 2011-11-02 | 北京大学 | Automobile exhaust gas purification device realizing photocatalysis based on plasmas |
| CN208236484U (en) * | 2018-04-18 | 2018-12-14 | 东北林业大学 | Spiral electrode plasma body cooperative wood-fibred filter core purification diesel engine exhaust apparatus |
| US20190055869A1 (en) * | 2016-03-01 | 2019-02-21 | Ngk Spark Plug Co., Ltd. | Plasma reactor |
| CN210637135U (en) * | 2019-07-01 | 2020-05-29 | 东北林业大学 | Square electrode low-temperature plasma and wood fiber combined tail gas treatment device |
-
2019
- 2019-07-01 CN CN201910583423.3A patent/CN112177709A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219338A (en) * | 2007-09-27 | 2008-07-16 | 深圳先进技术研究院 | Automobile tail gas purifier of low-temperature plasma body |
| CN102230410A (en) * | 2011-06-24 | 2011-11-02 | 北京大学 | Automobile exhaust gas purification device realizing photocatalysis based on plasmas |
| US20190055869A1 (en) * | 2016-03-01 | 2019-02-21 | Ngk Spark Plug Co., Ltd. | Plasma reactor |
| CN208236484U (en) * | 2018-04-18 | 2018-12-14 | 东北林业大学 | Spiral electrode plasma body cooperative wood-fibred filter core purification diesel engine exhaust apparatus |
| CN210637135U (en) * | 2019-07-01 | 2020-05-29 | 东北林业大学 | Square electrode low-temperature plasma and wood fiber combined tail gas treatment device |
Non-Patent Citations (1)
| Title |
|---|
| 孔萍等: "《塑料材料》", 31 July 2017, 广东高等教育出版社, pages: 145 * |
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