CN210993684U - Nitrogen oxide-containing waste gas treatment device provided with chlorine dioxide electrolysis generator - Google Patents
Nitrogen oxide-containing waste gas treatment device provided with chlorine dioxide electrolysis generator Download PDFInfo
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- CN210993684U CN210993684U CN201921158685.7U CN201921158685U CN210993684U CN 210993684 U CN210993684 U CN 210993684U CN 201921158685 U CN201921158685 U CN 201921158685U CN 210993684 U CN210993684 U CN 210993684U
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- chlorine dioxide
- electrolysis generator
- deodorant
- dioxide electrolysis
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Abstract
The utility model relates to a nitrogen oxide-containing waste gas treatment device provided with a chlorine dioxide electrolysis generator, which comprises a chlorine dioxide electrolysis generator, a spiral mixed gas pipe and a secondary absorber; wherein the chlorine dioxide electrolysis generator can generate chlorine dioxide gas by electrolyzing sodium chloride aqueous solution. Compared with the conventional solution type oxidant, the device has higher efficiency of oxidizing nitric oxide by the chlorine dioxide gas, better oxidation effect and better effect and efficiency of treating the whole waste gas; meanwhile, the sodium hypochlorite solution generated by electrolysis can be used as a deodorant for subsequent treatment, so that the addition of an external deodorant is reduced, the resource utilization rate is high, the cost is saved, the waste liquid amount generated by the whole equipment is reduced, the environment is protected, and the generation of secondary pollution is reduced.
Description
Technical Field
The utility model belongs to the technical field of the environmental protection, especially, relate to a set up oxynitride exhaust treatment device that contains of chlorine dioxide electrolysis generater.
Background
The most serious atmospheric pollution in the world today is acid pollution; the environmental acidification is mainly derived from sulfur dioxide (SO) emitted with the exhaust gas2) With Nitrogen Oxides (NO)X). The denitration technology is mainly selective reduction technology (SCR), selective non-reduction technology (SNCR), and the like. At present, with the continuous improvement of the requirements of environmental emission standard, NO treated by SCR and SNCR technologiesXThe emission can not reach the standard, and a plurality of factories adopt a mode of additionally arranging a wet-type washing tower behind the original equipment to carry out secondary treatment on the waste gas; in order to improve the purification efficiency, the wet scrubber often oxidizes NO in the exhaust gas to NO2(ii) a Conventional oxidizers are mainly of the solution type, and the solubility of NO is very low, resulting in very low oxidation efficiency, which affects the purification efficiency of the wet scrubber; in addition, the reducing agent adopted by the wet scrubber tower is mainly NaHS and Na2SO3Can cause H in the using process2S is generated, has odor and influences the environment and the health of people. Therefore, the utility model aims to solve the problem of providing a waste gas treatment device with high nitrogen oxide purification efficiency and no odor discharge.
Disclosure of Invention
An object of the utility model is to overcome prior art's weak point, provide a nitrogen oxide purification efficiency height, odorless exhaust treatment device.
In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a nitrogen oxide waste gas processing apparatus who sets up chlorine dioxide electrolysis generator which characterized in that: comprises a chlorine dioxide electrolysis generator, a spiral mixed gas pipe and a secondary absorber; the air outlet of the chlorine dioxide electrolysis generator is communicated with the air inlet of the spiral mixed gas pipe through a pipeline; the air outlet of the spiral mixed air pipe is communicated with the air inlet of the secondary absorber through a pipeline; the chlorine dioxide electrolysis generator can generate chlorine dioxide gas by electrolyzing sodium chloride aqueous solution; the air inlet of the spiral mixed air pipe is also communicated with an external pipeline for conveying waste gas containing nitrogen oxides; a reducing agent circulating liquid tank, a secondary absorber air inlet, a first filler layer, a reducing agent spraying system, a gas-liquid separation device, a second filler layer, a deodorant spraying system and a secondary absorber air outlet are sequentially arranged in the secondary absorber from bottom to top; the reducing agent circulating liquid tank is communicated with a reducing agent spraying system through a pipeline, and the gas-liquid separation device is communicated with a deodorant spraying system through a pipeline.
As a preferred scheme, the gas-liquid separation device comprises an umbrella cover, a cylinder body and a diaphragm plate; the umbrella cover is connected with the cylinder body through a support column; the bottom of the cylinder body is connected with the transverse partition plate, and the hollow part of the cylinder body penetrates through the transverse partition plate; the diaphragm plate and the side wall of the secondary absorber form a deodorant circulating liquid tank; the deodorant circulating liquid tank is communicated with the deodorant spraying system through a pipeline.
As a more preferable scheme, a deodorant mixing pipe is arranged on a pipeline between the deodorant circulating liquid tank and the deodorant spraying system; the liquid outlet of the chlorine dioxide electrolysis generator is communicated with the deodorant mixing pipe through a pipeline.
As a more preferable scheme, a dosing pump is arranged on a pipeline between the liquid outlet of the chlorine dioxide electrolysis generator and the deodorant mixing pipe.
As a preferable scheme, a gas concentration detector is arranged on a pipeline between the gas outlet of the spiral mixed gas pipe and the gas inlet of the secondary absorber.
As a preferable scheme, a pressurizing fan is arranged on a pipeline between an air outlet of the chlorine dioxide electrolysis generator and an air inlet of the spiral mixed gas pipe.
Preferably, the chlorine dioxide electrolysis generator is provided with a liquid level meter.
As a preferred scheme, a demisting layer is arranged between the deodorant spraying system and the air outlet of the secondary absorber.
The utility model has the advantages of: provides an exhaust gas treatment device with high nitrogen oxide purification efficiency and no odor discharge. Compared with the conventional solution type oxidant, the device has higher efficiency of oxidizing nitric oxide by the chlorine dioxide gas, better oxidation effect and better effect and efficiency of treating the whole waste gas; meanwhile, the sodium hypochlorite solution generated by electrolysis can be used as a deodorant for subsequent treatment, so that the addition of an external deodorant is reduced, the resource utilization rate is high, the cost is saved, the waste liquid amount generated by the whole equipment is reduced, the environment is protected, and the generation of secondary pollution is reduced.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.
Fig. 2 is a schematic structural view of the gas-liquid separation device of the present invention.
In the figure: 1 is chlorine dioxide electrolysis generator, 11 is level gauge, 12 is dosing pump, 13 is dosing valve, 2 is spiral mixing gas pipe, 21 is spiral fluid director, 3 is two-stage absorber, 31 is reducing agent circulation cistern, 32 is first packing layer, 33 is reducing agent spraying system, 34 is gas-liquid separation device, 341 is umbrella cover, 342 is barrel, 343 is diaphragm, 344 is support column, 345 is deodorant circulation cistern, 35 is second packing layer, 36 is deodorant spraying system, 37 is defogging layer, 38 is deodorant mixing tube, 4 is gas concentration detector, 5 is pressurizing fan.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings and examples, which are given by way of illustration only, not limitation, and are not intended to limit the scope of the invention. The structures, connections and methods not described in detail in the present application are all understood to be common general knowledge in the art. It should also be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1 and 2, a nitrogen oxide-containing waste gas treatment device provided with a chlorine dioxide electrolysis generator comprises a chlorine dioxide electrolysis generator 1, a spiral mixed gas pipe 2 and a secondary absorber 3; the air outlet of the chlorine dioxide electrolysis generator 1 is communicated with the air inlet of the spiral mixing air pipe 2 through a pipeline, and the air inlet of the spiral mixing air pipe 2 is also communicated with an external pipeline for conveying waste gas containing nitrogen oxides; the air outlet of the spiral mixed air pipe 2 is communicated with the air inlet of the secondary absorber 3 through a pipeline.
The chlorine dioxide electrolysis generator 1 is an electrolytic tank partitioned into three regions by diaphragms, and can electrolyze a sodium chloride aqueous solution to generate chlorine-containing negative ions, and the chlorine-containing negative ions are gathered near an anode and absorb energy to finally generate chlorine dioxide gas. Meanwhile, a liquid level meter 11 is arranged on the chlorine dioxide electrolysis generator 1; a medicine adding valve 13 is arranged on the liquid inlet of the chlorine dioxide electrolysis generator 1.
The spiral flow guider 21 is arranged in the spiral mixed gas pipe 2, and can mix chlorine dioxide gas generated from the chlorine dioxide electrolysis generator 1 with nitrogen oxide-containing waste gas conveyed from the outside and enable the chlorine dioxide gas and the nitrogen oxide-containing waste gas to react; compared with the traditional equipment, the efficiency of oxidizing the nitric oxide gas insoluble in water by the chlorine dioxide gas is higher, and the oxidation effect is better.
A reducing agent circulating liquid tank 31, a secondary absorber air inlet, a first filler layer 32, a reducing agent spraying system 33, a gas-liquid separation device 34, a second filler layer 35, a deodorant spraying system 36, a demisting layer 37 and a secondary absorber air outlet are sequentially arranged in the secondary absorber 3 from bottom to top; wherein the gas-liquid separation device 34 comprises an umbrella cover 341, a cylinder 342 and a diaphragm 343; the umbrella cover 341 is connected with the cylinder 342 through the supporting column 344; the bottom of the cylinder 342 is connected with a diaphragm 343, and the hollow part of the cylinder 342 penetrates through the diaphragm 343 and is communicated with the space of the lower secondary absorber 3; the transverse clapboard 343 and the side wall of the secondary absorber 3 form a deodorant circulating liquid tank 345; the deodorant circulating liquid tank 345 is communicated with the deodorant spraying system 36 through a pipeline, and a circulating pump and a deodorant mixing pipe 38 are arranged on the pipeline between the deodorant circulating liquid tank and the deodorant spraying system; the inlet end of the deodorant mixing pipe 38 is also communicated with the liquid outlet of the chlorine dioxide electrolysis generator 1 through a pipeline, and the pipeline is provided with a dosing pump 12; in addition, the reducing agent circulation liquid tank 31 is communicated with a reducing agent spraying system 33 through a pipeline, and a circulation pump is also arranged on the pipeline.
Meanwhile, a gas concentration detector 4 is arranged on a pipeline between the gas outlet of the spiral mixed gas pipe 2 and the gas inlet of the secondary absorber 3 and is used for monitoring the concentration of nitric oxide and nitrogen dioxide in the waste gas; a pressurizing fan 5 is arranged on a pipeline between the air outlet of the chlorine dioxide electrolysis generator 1 and the air inlet of the spiral mixed gas pipe 2 and is used for conveying chlorine dioxide gas.
The operation principle of the device is as follows:
(1) the sodium chloride water solution is electrolyzed in the chlorine dioxide electrolysis generator 1 to finally generate chlorine dioxide gas; the main reaction equation:
anode: cl-+2H2O→ClO2+4H++5e-(energization condition);
Cl-+H2O→HClO+H++2e-(energization condition);
the generated chlorine dioxide gas enters the spiral mixed gas pipe 2 according to the requirement under the action of the booster fan 5; meanwhile, the electrolysis can generate solutions such as sodium hypochlorite and the like (also can comprise sodium hydroxide solution with low content); after electrolysis for a period of time, after the sodium hypochlorite solution in the electrolyte is detected to be high in occupation ratio, the sodium hypochlorite-containing solution is sent to the deodorant mixing pipe 38 under the action of the dosing pump 12 and then used as a deodorant for subsequent treatment, so that the addition of an external deodorant is reduced, and the cost is saved; in addition, the liquid level meter 11 is linked with the dosing pump 12 and is used for preventing the electrolyte in the chlorine dioxide generator 1 from being emptied; the liquid level meter 11 is linked with a dosing valve 13 of a sodium chloride solution and used for preventing the electrolyte in the chlorine dioxide generator 1 from being excessive.
(2) The waste gas containing nitrogen oxide enters the spiral mixed gas pipe 2, and the chlorine dioxide gas also enters the spiral mixed gas pipe 2 under the action of the booster fan 5; the two gases are mixed and react to oxidize the nitric oxide gas in the waste gas into nitrogen dioxide gas, and the specific reaction equation is as follows:
2NO+ClO2+H20=NO2+HNO3+HCl；
the gas concentration detector 4 monitors the concentration and the ratio of nitric oxide to nitrogen dioxide in the waste gas, and when the molar ratio of the nitric oxide to the nitrogen dioxide is less than 1, the frequency of the booster fan 5 is increased through linkage with the booster fan 5, so that the air inflow of chlorine dioxide is increased; and conversely, when the ratio of the nitric oxide to the nitrogen dioxide is larger than 1, the frequency of the booster fan 5 is reduced, and the air inflow of the chlorine dioxide is reduced.
(3) The waste gas enters the secondary absorber 3 and moves from bottom to top; the reducing agent spraying system 33 sprays the reducing agent, and the reducing agent and the waste gas generate a reverse mass transfer reaction in the first filler layer 32 to remove nitrogen oxide compounds in the waste gas, and the specific reaction equation is as follows:
2NaHS+2NO2=Na2S2O3+N2+H20；
4Na2SO3+2NO2=4Na2SO4+N2；
the purified exhaust gas continues to move upwards, and the liquid phase falls back to the reducing agent circulating liquid tank 31, and is mixed for recycling.
(4) The exhaust gas passes through the gas-liquid separation device 34 and continues to move upwards to react with the deodorant sprayed from the deodorant spraying system 36, so as to remove the odor gas hydrogen sulfide, and the specific reaction equation is as follows:
H2S+4NaClO =H2SO4+4NaCl；
then the waste gas is discharged after small liquid drops carried in the waste gas are removed by the demisting layer 37; the liquid phase falls back to the deodorant circulating liquid tank 345 for recycling.
In light of the foregoing, it is to be understood that various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. A nitrogen oxide-containing waste gas treatment device provided with a chlorine dioxide electrolysis generator is characterized in that: comprises a chlorine dioxide electrolysis generator, a spiral mixed gas pipe and a secondary absorber; the air outlet of the chlorine dioxide electrolysis generator is communicated with the air inlet of the spiral mixed gas pipe through a pipeline; the air outlet of the spiral mixed air pipe is communicated with the air inlet of the secondary absorber through a pipeline; the chlorine dioxide electrolysis generator can generate chlorine dioxide gas by electrolyzing sodium chloride aqueous solution; the air inlet of the spiral mixed air pipe is also communicated with an external pipeline for conveying waste gas containing nitrogen oxides; a reducing agent circulating liquid tank, a secondary absorber air inlet, a first filler layer, a reducing agent spraying system, a gas-liquid separation device, a second filler layer, a deodorant spraying system and a secondary absorber air outlet are sequentially arranged in the secondary absorber from bottom to top; the reducing agent circulating liquid tank is communicated with a reducing agent spraying system through a pipeline, and the gas-liquid separation device is communicated with a deodorant spraying system through a pipeline.
2. The nitrogen oxide-containing exhaust gas treatment device provided with a chlorine dioxide electrolysis generator according to claim 1, wherein: the gas-liquid separation device comprises an umbrella cover, a cylinder body and a diaphragm plate; the umbrella cover is connected with the cylinder body through a support column; the bottom of the cylinder body is connected with the transverse partition plate, and the hollow part of the cylinder body penetrates through the transverse partition plate; the diaphragm plate and the side wall of the secondary absorber form a deodorant circulating liquid tank; the deodorant circulating liquid tank is communicated with the deodorant spraying system through a pipeline.
3. The nitrogen oxide-containing exhaust gas treatment device provided with a chlorine dioxide electrolysis generator according to claim 2, wherein: a deodorant mixing pipe is arranged on a pipeline between the deodorant circulating liquid tank and the deodorant spraying system; the liquid outlet of the chlorine dioxide electrolysis generator is communicated with the deodorant mixing pipe through a pipeline.
4. The nitrogen oxide-containing exhaust gas treatment device provided with a chlorine dioxide electrolysis generator according to claim 3, wherein: and a dosing pump is arranged on a pipeline between the liquid outlet of the chlorine dioxide electrolysis generator and the deodorant mixing pipe.
5. The nitrogen oxide-containing exhaust gas treatment device provided with a chlorine dioxide electrolysis generator according to claim 1, wherein: and a gas concentration detector is arranged on a pipeline between the gas outlet of the spiral mixed gas pipe and the gas inlet of the secondary absorber.
6. The nitrogen oxide-containing exhaust gas treatment device provided with a chlorine dioxide electrolysis generator according to claim 1, wherein: and a pressurizing fan is arranged on a pipeline between the air outlet of the chlorine dioxide electrolysis generator and the air inlet of the spiral mixed gas pipe.
7. The nitrogen oxide-containing exhaust gas treatment device provided with a chlorine dioxide electrolysis generator according to claim 1, wherein: the chlorine dioxide electrolysis generator is provided with a liquid level meter.
8. The nitrogen oxide-containing exhaust gas treatment device provided with a chlorine dioxide electrolysis generator according to claim 1, wherein: and a demisting layer is arranged between the deodorant spraying system and the air outlet of the secondary absorber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921158685.7U CN210993684U (en) | 2019-07-23 | 2019-07-23 | Nitrogen oxide-containing waste gas treatment device provided with chlorine dioxide electrolysis generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921158685.7U CN210993684U (en) | 2019-07-23 | 2019-07-23 | Nitrogen oxide-containing waste gas treatment device provided with chlorine dioxide electrolysis generator |
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| CN201921158685.7U Active CN210993684U (en) | 2019-07-23 | 2019-07-23 | Nitrogen oxide-containing waste gas treatment device provided with chlorine dioxide electrolysis generator |
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