CN102872703A - Device and process for purifying harmful gas through combining gas-liquid absorption with micro-electrolysis - Google Patents
Device and process for purifying harmful gas through combining gas-liquid absorption with micro-electrolysis Download PDFInfo
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- CN102872703A CN102872703A CN2012103925838A CN201210392583A CN102872703A CN 102872703 A CN102872703 A CN 102872703A CN 2012103925838 A CN2012103925838 A CN 2012103925838A CN 201210392583 A CN201210392583 A CN 201210392583A CN 102872703 A CN102872703 A CN 102872703A
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Abstract
The invention discloses a device and process for purifying harmful gas through combining gas-liquid absorption with micro-electrolysis. The device is composed of an absorption tower, a packing layer and an absorption liquid circulating tank, wherein the packing layer is composed of activated carbon and iron packing. The treatment process is implemented through that: a harmful gas containing airflow to be treated is imported into the device from the lower part of the absorption tower; then, when the harmful gas containing airflow passes through the packing layer composed of activated carbon and iron packing, the harmful gas is effectively absorbed and degraded under the electrode reaction action of multiple micro-batteries formed by the activated carbon and the iron packing; and finally, the purified airflow is discharged from a gas outlet at the upper part of the absorption tower. According to the invention, through adopting a mode of combining liquid absorption and micro electrolytic reaction, the absorption effect is greatly improved, and the possibility of secondary volatilization of harmful substances is also avoided, therefore, the device and process disclosed by the invention are especially applicable to the treatment of harmful gaseous pollutants such as chlorine-containing organic matters, toluene and the like which are poor in water solubility; and the device and process disclosed by the invention are high in treatment efficiency, large in treated gas volume, simple in operation, reliable and practical.
Description
Technical field
The present invention relates to a kind of Gas-Liquid Absorption in conjunction with device and the technique thereof of little electrolytic cleaning pernicious gas; be particularly related to volatile organic matters such as from air-flow, removing hydrocarbon, alcohol, ether, aldehyde, phenol, ketone, ester and amine; the method and apparatus of the inorganic matters such as hydrogen sulfide, sulfur dioxide, nitrogen oxide and ammonia belongs to Air Pollution Control and environmental protection technical field.
Background technology
The volatile organic matters such as hydrocarbonaceous, alcohol, ether, aldehyde, phenol, ketone, ester and amine, the inorganic matters such as hydrogen sulfide, sulfur dioxide, nitrogen oxide and ammonia result from chemistry, pharmacy, spray paint, the various production processes such as Sewage Disposal.These pollutants are not only harmful, some or carcinogen, and also a large amount of discharging is gone back the localized region environment and has been produced and seriously influence.But because these gases or to have chemical constitution more stable be difficult for the characteristics of degraded, or threshold value are lower, brings very large difficulty to purified treatment.
Usually, adopting liquid absorption method is one of main method of removing these pernicious gases, but that the subject matter of the method is absorptive capacity is limited, and absorption liquid is saturated easily.Solution after the absorption must further be processed, if directly send wastewater disposal basin back to, the product that is absorbed after the processing can evaporate again, will cause the generation of secondary pollution.How when improving absorption efficiency, the generation of avoiding again secondary pollution is urgent problem in this skilled industry application process.
The basic principle of liquid phase micro-electrolysis method is to utilize microelectrolysis process in electrode surface generation electrochemical reaction, produces strong oxidative free radical such as OH, HO
2And H
2O
2Deng, these strong oxidizing property materials and nuisance reaction finally are converted into harmless object to nuisance.General micro-electrolysis method is used for the wastewater treatment of chemical industry difficult degradation, and also to the technology report of little electrolysis, but document all concentrates in the processing of waste water and uses in the Chinese patent literature storehouse.Not yet see the report that micro electrolysis tech is applied to waste gas pollution control and treatment.
The objective of the invention is to design and device and the technique thereof of a kind of Gas-Liquid Absorption in conjunction with little electrolytic cleaning pernicious gas is provided, be used for removing pernicious gas from air-flow, these pernicious gases that contain in the air-flow are effectively absorbed and degrade, thereby reach the purpose of cleaning harmful gas.
Summary of the invention
Primary technical problem to be solved by this invention is to provide device and the technique thereof of a kind of absorption in conjunction with little electrolytic cleaning harmful exhaust for existing background technology, it is to adopt to absorb in conjunction with micro electrolysis tech, be used for from air-flow except volatile organic matters such as dealkylation, alcohol, ether, aldehyde, phenol, ketone, ester and amine, the inorganic matters such as hydrogen sulfide, sulfur dioxide, nitrogen oxide and ammonia, these gaseous contaminants are converted into chemically stable material, make absorption liquid recover absorbability, thereby reach gas purification and avoid the problem of secondary pollution purpose.
A kind of device and technique thereof that absorbs in conjunction with little electrolytic cleaning harmful exhaust of the present invention, it is characterized in that described device is general gas-liquid absorption equipment-packing material absorbing tower structure, be provided with in the absorption tower as the ferrous material of little electrolytic anode and the packing layer that forms as the active carbon of little electrolysis cathode and pernicious gas adsorbent, ferrous material is generally the structured packing structure, can be according to the relevant filling-material structure on the tower chemical industry equipment handbook such as the apolegamys such as Raschig ring, Pall ring and cascade ring, effect is about the same.The active carbon structure is generally sphere or cylindricality, diameter is generally 1-50mm, also can be according to iron filler shape and structure customization and coupling, make iron filler and activated carbon even contact mixing placement in the packing layer, in order to effectively form the little electrolysis system of iron charcoal, the filling of general iron filler and activated carbon is than not can be 1 by external surface area than (not containing internal surface area): 0.5-1: 10, and the size of iron filler and activated carbon, shape, structure and proportioning can be according to absorbing the parameter apolegamys such as tower diameter, harmful gas concentration and processing tolerance.General described packing layer porosity is 10%-90%, and the best is 20%-40%.The bottom, absorption tower is provided with the pernicious gas import, gas vent after the top on absorption tower is provided with and purifies, and the bottom on absorption tower is provided with the absorption liquid circulating slot, and the bottom liquid outlet of circulating slot is connected with the inlet of valve with top, absorption tower by circulating pump, pipeline.
The purified treatment that described device is used for pernicious gas, adopt following technique: the pending air-flow that contains pernicious gas is imported described absorption tower, through the packing layer zone that is formed by iron filler and active carbon, gas-solid-liquid phase reaction district with the absorption liquid formation that flows down from top, absorption tower, pernicious gas at first absorbed by the liquid phase that flows down along iron filler and activated carbon surface and liquid phase in the active carbon suction, then under the electrode reaction effect of the numerous micro cell that active carbon and iron filler consist of, material such as OH, HO with strong reactivity have been produced
2And H
2O
2Deng free radical, these materials be dissolved in the solution and by the nuisance generation chemical reaction of charcoal absorption, finally gas phase nuisance degraded, pernicious gas effectively absorbed and purify.
Absorption liquid of the present invention generally adopts the pH value less than 7.5 acidic aqueous solution, example hydrochloric acid or sulfuric acid, and the degradation rate of the nuisance under sour environment is higher.And in solution, can add the salt such as a certain amount of sodium chloride or sodium sulphate as electrolyte, electrolyte mass percent concentration concentration is generally 0.1%-25%.
Compared with prior art, the invention has the advantages that: the mode that adopts liquid absorption and micro-electrolysis reaction to combine, be absorbed by liquid absorption when making pernicious gas by the absorption tower and charcoal absorption wherein, greatly improved the absorbability of absorption liquid, further make pernicious gas obtain degraded by the little electrolytics reaction of iron charcoal, thereby greatly improved assimilation effect, also avoided the possibility of nuisance secondary volatilization, be specially adapted to water-soluble bad harmful gaseous pollutant such as chlorinated organics, the organic processing such as toluene, has the treatment effeciency height, process large-minded, simple to operate, reliable and practical.
Description of drawings
Accompanying drawing is a kind of absorption of the present invention in conjunction with the apparatus structure schematic diagram of little electrolytic cleaning pernicious gas, wherein label: 1 circulating pump; 2 liquid outlets; 3 absorption liquid circulating slots; 4 liquid level gauges; 5 filling openings; 6 gas feeds; 7 gas distribution grids; 8 absorption tower inlets; 9 gas vents; 10 activated carbon; 11 iron fillers; 12 leakage fluid drams.
This apparatus structure is that the bottom, absorption tower is provided with air inlet 5, the top on absorption tower is provided with gas outlet 8, the bottom on absorption tower is provided with absorption liquid circulating slot 3, the bottom of circulating slot 2 has liquid outlet 2 to be connected by circulating pump 1, pipeline and the valve absorption tower inlet 8 with absorption cat head top, the little electrolysis system that is comprised of activated carbon 10 and iron filler 11 is set in the absorption tower, and the bottom on absorption tower also arranges by leakage fluid dram 12.
The processing technological flow of device of the present invention is that pending waste gas is entered in the absorption tower by air inlet 6 and contacts with spray liquid, carries out absorption reaction, and the waste gas after the processing 8 is discharged from the cat head gas outlet.Generation micro-electrolysis reaction district enters absorption liquid circulating slot 3 during packing layer that absorption liquid is comprised of activated carbon 10 and iron filler 11 by tower middle part, then returns the absorption tower by drain pipe 2 through circulating pump 1.
The specific embodiment
Embodiment is described in further detail the present invention below in conjunction with accompanying drawing, but protection scope of the present invention is not limited to this.
Embodiment 1: the experimental provision system flow as shown in drawings, the absorption tower is the packed tower structure, composition of tower shell material is polypropylene, tower diameter is Ф 300mm, and bed stuffing height is 2500mm, is comprised of irony Pall ring and activated carbon, Pall ring diameter 25mm wherein, thickness is 2mm.The active carbon diameter is about 15mm, and the packing layer porosity is about about 25%.Simulated exhaust is passed into by the tower bottom air inlet, behind gas-solid-liquid phase reaction district, is discharged by top.
Experiment condition is: absorption liquid is the common salt aqueous solution+hydrochloric acid of 2%.PH value of solution=3 ± 0.5.
Gas flow: 200m
3/ h, gas temperature: 25 ℃.
The waste gas kind is common are the volatilizations such as the representational hydrocarbon of table, alcohol, ether, aldehyde, phenol, ketone, ester and amine
Organic matter, the inorganic matters such as hydrogen sulfide, sulfur dioxide, nitrogen oxide and ammonia.
Carrier gas: air.
Pump flow: 5m
3/ h.
Experimental result is as shown in table 1.
Table 1 nuisance removal effect
Embodiment 2: shown in the experimental provision system flow accompanying drawing.
Experiment condition is: absorption liquid is the sodium sulphate aqueous solution+sulfuric acid of 2%.PH value of solution=5 ± 0.5.
Other conditions are with embodiment 1.
Experimental result: as shown in table 2.
Table 2 nuisance removal effect
Claims (8)
1. an absorption is in conjunction with the device of little electrolytic cleaning harmful exhaust, it is characterized in that packing layer and absorption liquid circulating slot that described device comprises the absorption tower, is comprised of activated carbon and iron filler; The bottom on described absorption tower is provided with gas feed and absorption liquid circulating slot, and the top on absorption tower is provided with gas vent and inlet, and described absorption liquid circulating slot is connected by the night mouth of advancing on circulating pump, pipeline, valve and top, absorption tower.
2. device according to claim 1 is characterized in that the described packing layer that is comprised of activated carbon and iron filler is arranged on inside, absorption tower, and iron filler and activated carbon even contact are mixed placement.
3. device according to claim 1 and 2 is characterized in that described packing layer porosity is 10%-90%.
4. according to claim 1 and 2 or 3 described devices, it is characterized in that ferrous material is the relevant structured packing on the chemical industry equipment handbook, comprise Raschig ring, Pall ring or cascade ring, active carbon is sphere or cylindricality, and diameter is 1mm-50mm.
5. technique of utilizing device purification of harmful waste gas claimed in claim 1, it is characterized in that described technique is that the pending air-flow that contains harmful gas is imported by the bottom, absorption tower, when regional through the packing layer that is formed by iron filler and active carbon, pernicious gas at first absorbed by the absorption liquid that flows down along iron filler and activated carbon surface and absorption liquid in the active carbon suction, then under the electrode reaction effect of the numerous micro cell that active carbon and iron filler consist of, pernicious gas is effectively absorbed and degrade, the air-flow after the purification is discharged from the gas vent on the top on absorption tower.
6. technique according to claim 5 is characterized in that described absorption liquid adopts the pH value less than 7.5 hydrochloric acid or aqueous sulfuric acid.
7. according to claim 5 or 6 described techniques, it is characterized in that described absorption liquid adds a certain amount of sodium chloride or sodium sulphate, electrolyte mass percent concentration concentration is generally 0.1%-25%.
8. according to claim 5 or 6 or 7 described techniques, it is characterized in that described pernicious gas is following one or more mixing: hydrocarbon, alcohol, ether, aldehyde, phenol, ketone, ester, hydrogen sulfide, sulfur dioxide, nitrogen oxide, ammonia.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012103925838A CN102872703A (en) | 2012-10-03 | 2012-10-03 | Device and process for purifying harmful gas through combining gas-liquid absorption with micro-electrolysis |
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|---|---|---|---|
| CN2012103925838A CN102872703A (en) | 2012-10-03 | 2012-10-03 | Device and process for purifying harmful gas through combining gas-liquid absorption with micro-electrolysis |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103961997A (en) * | 2014-05-29 | 2014-08-06 | 湖南众鑫新材料科技有限公司 | Process for recycling exhaust gas from ammonium metavanadate roasting furnace |
| WO2017211280A1 (en) * | 2016-06-08 | 2017-12-14 | 黄华丽 | Method and device using gas discharge technique and solution absorption technique to remove hazardous gas |
| CN107824021A (en) * | 2017-12-14 | 2018-03-23 | 侯梦斌 | The flue gas purifying equipment and technique of a kind of small scall coal-fired boiler |
| CN108352585A (en) * | 2016-01-06 | 2018-07-31 | 株式会社Lg化学 | Include the secondary cell of gas absorption polymer |
| CN108786395A (en) * | 2018-08-19 | 2018-11-13 | 煤科集团杭州环保研究院有限公司 | A kind of sludge drying exhaust treatment system |
| CN110090529A (en) * | 2018-01-30 | 2019-08-06 | 荆门市格林美新材料有限公司 | A kind of waste lithium cell dismantling exhaust-gas treatment spray-absorption system and the method using it |
| CN110655257A (en) * | 2019-10-15 | 2020-01-07 | 东北石油大学 | Phenol wastewater treatment method |
| CN110721563A (en) * | 2019-08-29 | 2020-01-24 | 武汉时泰环保科技有限公司 | Chlorine-containing organic waste gas purification treatment process |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103961997A (en) * | 2014-05-29 | 2014-08-06 | 湖南众鑫新材料科技有限公司 | Process for recycling exhaust gas from ammonium metavanadate roasting furnace |
| CN108352585A (en) * | 2016-01-06 | 2018-07-31 | 株式会社Lg化学 | Include the secondary cell of gas absorption polymer |
| CN108352585B (en) * | 2016-01-06 | 2021-05-25 | 株式会社Lg化学 | Secondary battery comprising gas-adsorbing polymer |
| WO2017211280A1 (en) * | 2016-06-08 | 2017-12-14 | 黄华丽 | Method and device using gas discharge technique and solution absorption technique to remove hazardous gas |
| CN107824021A (en) * | 2017-12-14 | 2018-03-23 | 侯梦斌 | The flue gas purifying equipment and technique of a kind of small scall coal-fired boiler |
| CN110090529A (en) * | 2018-01-30 | 2019-08-06 | 荆门市格林美新材料有限公司 | A kind of waste lithium cell dismantling exhaust-gas treatment spray-absorption system and the method using it |
| CN108786395A (en) * | 2018-08-19 | 2018-11-13 | 煤科集团杭州环保研究院有限公司 | A kind of sludge drying exhaust treatment system |
| CN110721563A (en) * | 2019-08-29 | 2020-01-24 | 武汉时泰环保科技有限公司 | Chlorine-containing organic waste gas purification treatment process |
| CN110655257A (en) * | 2019-10-15 | 2020-01-07 | 东北石油大学 | Phenol wastewater treatment method |
| CN110655257B (en) * | 2019-10-15 | 2021-12-21 | 东北石油大学 | Phenol wastewater treatment method |
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Application publication date: 20130116 |