CN102179137A - Method for treating organic waste gas - Google Patents
Method for treating organic waste gas Download PDFInfo
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- CN102179137A CN102179137A CN2011101145131A CN201110114513A CN102179137A CN 102179137 A CN102179137 A CN 102179137A CN 2011101145131 A CN2011101145131 A CN 2011101145131A CN 201110114513 A CN201110114513 A CN 201110114513A CN 102179137 A CN102179137 A CN 102179137A
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Abstract
The invention discloses a method for treating organic waste gas, which comprises the following steps of: conveying waste gas in production departments in the industries such as pharmacy, chemical engineering, semiconductors and the like into a primary absorption tower through a fan, making the waste gas contacted with an absorbent pumped by an absorbent circulating pump through the tower top and is sprayed in a countercurrent mode, absorbing water-soluble gas in the waste gas, discharging a liquid phase in the primary absorption tower into a first absorbent storage tank filled with an absorbent prepared in advance, and discharging the gas treated by the primary absorption tower through the upper part of the absorption tower; and if water-insoluble gas is needed to be treated, discharging the treated gas into a secondary absorption tower, making the gas contacted with an absorbent pumped by an absorbent circulating pump through the tower top and is sprayed in a countercurrent mode, absorbing the water-insoluble gas in the waste gas, discharging a liquid phase of the secondary absorption tower into a second absorbent storage tank filled with an absorbent prepared in advance, and discharging the gas treated by the secondary absorption tower through the upper part of the absorption tower, wherein the absorbent can be recycled.
Description
Technical field
The present invention relates to the processing method of a kind of waste gas processing method, particularly a kind of organic exhaust gas.
Background technology
A large amount of benzene, toluene, carrene, chloroform, acetone, ethyl acetate, methyl ether, methyl alcohol, ethanol, N of using in industrial production such as pharmacy, chemical industry, semiconductor, organic solvents such as accelerine, because these organic solvents have effumability, produce a large amount of organic exhaust gas in process of production, therefore, the improvement to organic exhaust gas becomes very important in an air contaminant treatment critical part.
Processing method to organic exhaust gas in the industry at present mainly contains active carbon adsorption, absorption process, Production by Catalytic Combustion Process, biofilter method, membrane separation process etc.In actual production, what usually run into is low concentration, big air quantity, the unsettled organic exhaust gas of content, and in this case, it is optimum adopting liquid absorption method.Liquid absorption method is by the contacting of waste gas and absorbent, and makes wherein harmful constituent be absorbed agent and absorbs.Through desorb, its component is removed or reclaimed, make absorbent regeneration, reuse.The required cleaning equipment volume of this method is little, and cost is low, and absorbent can be regenerated, and pollutant can be converted into useful products, and the key of this technology is the selection of absorbent.The present invention is directed to the organic exhaust gas of heterogeneity, utilize special-purpose absorbent that organic exhaust gas is carried out purified treatment, and utilize distillating method to reclaim organic solvent, make special-purpose absorbent regeneration, realize the comprehensive utilization of resource.
Summary of the invention
Goal of the invention: the present invention is directed to the deficiencies in the prior art, disclose a kind of organic exhaust gas, utilize special-purpose absorbent organic exhaust gas to be carried out the method for purified treatment at heterogeneity.
Technical scheme: the invention discloses a kind of method of handling organic exhaust gas, may further comprise the steps:
(1) organic exhaust gas is entered the absorption tower,, absorb the pernicious gas in the waste gas with the absorbent counter current contacting of cat head spray;
(2) treatment fluid in the absorption tower enters the absorbent storage tank, and the gas after handling through the absorption tower is discharged from the top on absorption tower;
(3) after the treatment fluid in the absorbent storage tank absorbs organic exhaust gas and reaches capacity, realize absorbent and be absorbed separating of organic solvent by distillation, make reuse behind the absorbent regeneration, reclaim organic solvent simultaneously according to the difference of boiling point.
A kind of in described absorption tower preferred filler tower, spray column or the plate column.
The described organic exhaust gas of step (1) is water-soluble gas, water-insoluble gas; Water-soluble gas is gases such as methyl alcohol, ethanol, acetone, triethylamine; Water-insoluble gas is benzene, toluene, carrene, chloroform, ethyl acetate, methyl ether, N, gases such as accelerine.
The absorbent of treatment of water-soluble gas is one or more in the absorbents such as no salt solution, dilute sulfuric acid, watery hydrochloric acid, phosphoric acid,diluted, dilute sodium hydroxide, dilute sodium carbonate or rare calcium hydroxide.
The absorbent of handling water-insoluble gas is one or more in oil, compound diesel, gasoline, composite gasoline, machine oil, biodiesel, soya-bean oil or the sulfonated coal wet goods absorbent.
At the organic exhaust gas of different component, can select water-soluble gas processing method or water-insoluble gas processing method separately for use; Perhaps use water-soluble gas processing method and water-insoluble gas processing method successively, the use order can be changed, and does not influence result.
Beneficial effect: adopt the special-purpose absorbent of technical scheme of the present invention and optimization, can be used for the processing of all kinds of organic exhaust gas of high concentration, big flow and complicated component.Special-purpose absorbent is to the removal efficient height of waste gas, and it is wide to adapt to concentration range, and the voc_s removal rate is more than 95%.Special-purpose absorbent absorbs can realize reuse behind the absorbent regeneration by distillation according to the difference of boiling point after saturated, saves cost.
Description of drawings
Accompanying drawing is a kind of process chart of handling the method for organic exhaust gas.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further explained.
A kind of method of handling organic exhaust gas, will be from the waste gas in industrial production workshops such as pharmacy, chemical industry, semiconductor, enter first grade absorption tower through the blower fan transmission, squeeze into absorbent counter current contacting under the cat head spray with the absorbent circulating pump, absorb the water-soluble gas in the waste gas body, liquid phase in the first grade absorption tower enters the first absorbent storage tank, in the first absorbent storage tank absorbent for preparing in advance is housed, and the gas after handling through first grade absorption tower is discharged from the top on absorption tower; As carrying out water-insoluble gas treatment, to handle gas and enter two-level absorption tower, gas and absorbent circulating pump are squeezed into the absorbent counter current contacting under the cat head spray, absorb the water-insoluble gas in the waste gas, liquid phase in the two-level absorption tower enters the second absorbent storage tank, in the second absorbent storage tank, the absorbent for preparing in advance is housed, absorbent can be recycled, discharge from the top on absorption tower through the gas after the two-level absorption tower processing, the exhaust index reaches " discharge standard of air pollutants " requirement (GB16297-1996).Absorbent absorbs can be realized absorbent and be absorbed separating of organic solvent by distillation according to the difference of boiling point after saturated, reclaims organic solvent, makes reuse behind the absorbent regeneration simultaneously.
Embodiment 1: utilize technology of the present invention, the waste gas in certain company Tiamulin workshop is handled.
The exhaust emission in certain company antibiotics production workshop has: methyl alcohol, ethyl acetate, MIBK, methanol concentration is 1800～2800 mg/m in the waste gas
3, ethyl acetate concentration is 1200～1700 mg/m
3, MIBK concentration is 1500～2300mg/m
3
Waste gas from certain workshop, company antibiotics production workshop, enter first grade absorption tower through the first grade absorption tower blower fan, squeeze into no salt solution counter current contacting under the cat head spray with no salt water circulating pump, absorb the methanol gas in the waste gas, the liquid phase in the first grade absorption tower enters salt-free water storage tank, and no salt solution is housed in salt-free water storage tank, no salt solution can be recycled, discharge from the top on absorption tower through the gas after the first grade absorption tower absorption, enter two-level absorption tower, gas and 45
#Oil cirulating pump is squeezed into 45 under the cat head spray
#The machine oil counter current contacting absorbs ethyl acetate, MIBK gas in the waste gas, and the liquid phase in the two-level absorption tower enters 45
#The machine oil storage tank is 45
#45# machine oil is housed in the machine oil storage tank, and 45# machine oil can be recycled, and the gas after absorbing through two-level absorption tower is discharged from the top on absorption tower.Methanol concentration is 40～130 mg/m in the exhaust
3, ethyl acetate concentration is 30～82 mg/m
3, MIBK concentration is 40～110mg/m
3, the clearance of methyl alcohol, ethyl acetate, MIBK is respectively 95.4%～97.8%, 95.2%～97.5%, 95.2%～97.3% in the waste gas after treatment, and the exhaust index is lower than " discharge standard of air pollutants " requirement (GB16297-1996).
After no salt solution absorbs methyl alcohol and reaches capacity, reclaim methyl alcohol by distillating method, the no salt solution that distills out behind the methyl alcohol is squeezed into reuse in the salt-free water storage tank; After 45# machine oil absorbs ethyl acetate, MIBK and reaches capacity, reclaim ethyl acetate, MIBK according to boiling point difference respectively by distillating method, the 45# machine oil that distills out behind ethyl acetate, the MIBK is squeezed into reuse in the 45# machine oil storage tank; The methyl alcohol that distillation obtains, ethyl acetate, MIBK are after rectifying, and purity reaches the technical grade quality standard, can be back in the pharmaceutical production.
Embodiment 2: utilize technology of the present invention, the waste gas in certain company AVM workshop is handled.
The exhaust emission that certain company extracts the workshop has: methyl alcohol, ethanol, toluene and micro-hydrochloric acid mist, methanol concentration is 900～2600 mg/m in the waste gas
3, concentration of alcohol is 1500～1900 mg/m
3, toluene concentration is 600～950mg/m
3, the hydrochloric acid mist degree is 2～5mg/m
3
Extract the waste gas in workshop, workshop from certain company, enter first grade absorption tower through the first grade absorption tower blower fan, squeeze into dilute sodium hydroxide counter current contacting under the cat head spray with 2% diluted sodium hydroxide solution circulating pump, absorb the methyl alcohol in the waste gas, ethanol, trace hydrochloric acid mist gas, liquid phase in the first grade absorption tower enters the diluted sodium hydroxide solution storage tank, 2% the diluted sodium hydroxide solution for preparing in advance is housed in the diluted sodium hydroxide solution storage tank, diluted sodium hydroxide solution can be recycled, discharge from the top on absorption tower through the gas after the first grade absorption tower absorption, enter two-level absorption tower, gas and biodiesel circulating pump are squeezed into the biodiesel counter current contacting under the cat head spray, absorb the toluene gas in the waste gas, liquid phase in the two-level absorption tower enters the biodiesel storage tank, in the biodiesel storage tank, biodiesel is housed, biodiesel can be recycled, and the gas after absorbing through two-level absorption tower is discharged from the top on absorption tower.Methanol concentration is 30～115 mg/m in the exhaust
3, concentration of alcohol is 30～70mg/m
3, toluene concentration is 15～35mg/m
3, the hydrochloric acid mist detected value is 0; The clearance of methyl alcohol, ethanol, toluene is respectively 95.6%～96.7%, 96.3%～98.0%, 96.3%～97.5% in the waste gas after treatment, and the exhaust index is lower than " discharge standard of air pollutants " requirement (GB16297-1996).
After absorbing methyl alcohol, ethanol in the diluted sodium hydroxide solution and reaching capacity, reclaim methyl alcohol, ethanol according to boiling point difference respectively by distillating method, distill out and squeeze into reuse in the diluted sodium hydroxide solution storage tank after diluted sodium hydroxide solution behind methyl alcohol, the ethanol suitably mends NaOH; After biodiesel absorbs toluene and reaches capacity, reclaim toluene by distillating method, the biodiesel that distills out behind the toluene is squeezed into reuse in the biodiesel storage tank; The methyl alcohol that distillation obtains, ethanol, toluene are after rectifying, and purity reaches the technical grade quality standard, can be back in the pharmaceutical production.
The invention provides a kind of thinking and method of handling organic exhaust gas; the method and the approach of this technical scheme of specific implementation are a lot; the above only is a preferred implementation of the present invention; should be understood that; for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications; these improvements and modifications also should be considered as protection scope of the present invention, and all available prior art of each part not clear and definite in the present embodiment is realized.
Claims (5)
1. a method of handling organic exhaust gas is characterized in that, may further comprise the steps:
(1) organic exhaust gas is entered the absorption tower,, absorb the pernicious gas in the waste gas with the absorbent counter current contacting of cat head spray;
(2) treatment fluid in the absorption tower enters the absorbent storage tank, and the gas after handling through the absorption tower is discharged from the top on absorption tower;
(3) after the treatment fluid in the absorbent storage tank absorbs organic exhaust gas and reaches capacity, realize absorbent and be absorbed separating of organic solvent by distillation, make reuse behind the absorbent regeneration, reclaim organic solvent simultaneously according to the difference of boiling point.
2. a kind of method of handling organic exhaust gas according to claim 1 is characterized in that, the absorption tower is a kind of in packed tower, spray column or the plate column.
3. a kind of method of handling organic exhaust gas according to claim 1 is characterized in that, the described organic exhaust gas of step (1) is water-soluble gas, water-insoluble gas.
4. according to claim 1 or 3 described a kind of methods of handling organic exhaust gas, it is characterized in that the absorbent of treatment of water-soluble gas is one or more in the absorbents such as no salt solution, dilute sulfuric acid, watery hydrochloric acid, phosphoric acid,diluted, dilute sodium hydroxide, dilute sodium carbonate or rare calcium hydroxide.
5. according to claim 1 or 3 described a kind of methods of handling organic exhaust gas, it is characterized in that the absorbent of handling water-insoluble gas is one or more in diesel oil, compound diesel, gasoline, composite gasoline, machine oil, biodiesel, soya-bean oil or the sulfonated coal wet goods absorbent.
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| CN2011101145131A CN102179137A (en) | 2011-05-05 | 2011-05-05 | Method for treating organic waste gas |
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| CN2011101145131A CN102179137A (en) | 2011-05-05 | 2011-05-05 | Method for treating organic waste gas |
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Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103041610A (en) * | 2012-12-05 | 2013-04-17 | 向明强 | Recycling device of modular solvent and heat energy and application of recycling device |
| CN103143239A (en) * | 2013-03-19 | 2013-06-12 | 无锡金博甜菊国际贸易有限公司 | Solvent absorption tower for stevioside production |
| CN104275073A (en) * | 2013-07-04 | 2015-01-14 | 中石化广州工程有限公司 | Methyl alcohol gas absorbing method and device |
| CN104524930A (en) * | 2014-12-03 | 2015-04-22 | 武汉旭日华科技发展有限公司 | Acetone exhaust-gas recovery and refining device and method thereof |
| CN104548875A (en) * | 2014-11-04 | 2015-04-29 | 华文蔚 | Method for purifying volatile organic poison gas |
| CN105056706A (en) * | 2015-08-19 | 2015-11-18 | 常州大学 | Methanol waste gas recycling system based on secondary absorption |
| CN105617856A (en) * | 2016-03-15 | 2016-06-01 | 北京沃太斯环保科技发展有限公司 | Biological absorbent for treating hydrocarbon organic waste gas and preparation method thereof |
| CN105642076A (en) * | 2016-02-23 | 2016-06-08 | 北京沃太斯环保科技发展有限公司 | Absorbent for removing non-methane hydrocarbons and preparation method of absorbent |
| CN105727693A (en) * | 2016-02-23 | 2016-07-06 | 北京沃太斯环保科技发展有限公司 | Absorbent for removing VOC waste gas and preparation method thereof |
| CN106045814A (en) * | 2016-06-30 | 2016-10-26 | 芜湖芳华生物科技有限公司 | Methanol waste gas recovery process for deodorant extraction production |
| CN106823696A (en) * | 2017-03-14 | 2017-06-13 | 常州大学 | Based on two grades of absorptions, the VOCs retracting devices of three steps condensation integrated technique and method |
| CN107174924A (en) * | 2017-07-26 | 2017-09-19 | 天津普瑞爱尔科技有限公司 | A kind of energy-efficient absorption tower |
| CN107670465A (en) * | 2017-09-29 | 2018-02-09 | 北京石油化工学院 | A kind of handling process of VOCs waste gas |
| CN107774097A (en) * | 2017-09-29 | 2018-03-09 | 北京石油化工学院 | A kind of handling process of VOCs waste gas |
| CN107824009A (en) * | 2017-09-29 | 2018-03-23 | 北京石油化工学院 | A kind of processing recovery process of water-insoluble VOCs waste gas |
| CN108662595A (en) * | 2017-03-31 | 2018-10-16 | 安士英 | Hydrogen and oxygen mixture handles organic exhaust gas device |
| CN110975552A (en) * | 2019-12-11 | 2020-04-10 | 陈嘉斌 | Organic waste gas processor based on ethyl acetate and used for lining extraction, neutralization and ester scraping |
| CN111408236A (en) * | 2020-03-17 | 2020-07-14 | 上海汉洁环境工程有限公司 | Waste gas absorption liquid for volatile organic gas treatment |
| CN111871151A (en) * | 2020-07-22 | 2020-11-03 | 循天能源环境科技有限公司 | Absorption treatment method for VOCs organic waste gas |
| CN112807940A (en) * | 2020-12-31 | 2021-05-18 | 南京都乐制冷设备有限公司 | Method for treating VOCs waste gas containing light alkane |
| CN113546935A (en) * | 2021-08-18 | 2021-10-26 | 广东瀚宇能源应用技术有限公司 | Unburned methanol cleaning structure of hearth of methanol hot-blast stove |
| CN114210174A (en) * | 2021-11-10 | 2022-03-22 | 生态环境部华南环境科学研究所 | Absorption/adsorption coupling reinforced stink and organic waste gas treatment method |
| CN115445392A (en) * | 2022-09-30 | 2022-12-09 | 上海化工研究院有限公司 | Recycling treatment process for chlorine-containing volatile organic compound waste gas |
| CN116078118A (en) * | 2023-04-10 | 2023-05-09 | 佛山市大随环保科技有限公司 | Organic waste gas treatment system and method |
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Cited By (28)
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|---|---|---|---|---|
| CN103041610A (en) * | 2012-12-05 | 2013-04-17 | 向明强 | Recycling device of modular solvent and heat energy and application of recycling device |
| CN103143239A (en) * | 2013-03-19 | 2013-06-12 | 无锡金博甜菊国际贸易有限公司 | Solvent absorption tower for stevioside production |
| CN104275073A (en) * | 2013-07-04 | 2015-01-14 | 中石化广州工程有限公司 | Methyl alcohol gas absorbing method and device |
| CN104548875A (en) * | 2014-11-04 | 2015-04-29 | 华文蔚 | Method for purifying volatile organic poison gas |
| CN104524930A (en) * | 2014-12-03 | 2015-04-22 | 武汉旭日华科技发展有限公司 | Acetone exhaust-gas recovery and refining device and method thereof |
| CN105056706A (en) * | 2015-08-19 | 2015-11-18 | 常州大学 | Methanol waste gas recycling system based on secondary absorption |
| CN105727693A (en) * | 2016-02-23 | 2016-07-06 | 北京沃太斯环保科技发展有限公司 | Absorbent for removing VOC waste gas and preparation method thereof |
| CN105642076A (en) * | 2016-02-23 | 2016-06-08 | 北京沃太斯环保科技发展有限公司 | Absorbent for removing non-methane hydrocarbons and preparation method of absorbent |
| CN105617856A (en) * | 2016-03-15 | 2016-06-01 | 北京沃太斯环保科技发展有限公司 | Biological absorbent for treating hydrocarbon organic waste gas and preparation method thereof |
| CN106045814A (en) * | 2016-06-30 | 2016-10-26 | 芜湖芳华生物科技有限公司 | Methanol waste gas recovery process for deodorant extraction production |
| CN106045814B (en) * | 2016-06-30 | 2018-08-14 | 芜湖芳华生物科技有限公司 | A kind of methanol waste gas recovery technology in deodorant extraction production |
| CN106823696A (en) * | 2017-03-14 | 2017-06-13 | 常州大学 | Based on two grades of absorptions, the VOCs retracting devices of three steps condensation integrated technique and method |
| CN108662595B (en) * | 2017-03-31 | 2019-08-06 | 安士英 | Hydrogen and oxygen mixture handles organic exhaust gas device |
| CN108662595A (en) * | 2017-03-31 | 2018-10-16 | 安士英 | Hydrogen and oxygen mixture handles organic exhaust gas device |
| CN107174924A (en) * | 2017-07-26 | 2017-09-19 | 天津普瑞爱尔科技有限公司 | A kind of energy-efficient absorption tower |
| CN107824009A (en) * | 2017-09-29 | 2018-03-23 | 北京石油化工学院 | A kind of processing recovery process of water-insoluble VOCs waste gas |
| CN107774097A (en) * | 2017-09-29 | 2018-03-09 | 北京石油化工学院 | A kind of handling process of VOCs waste gas |
| CN107670465A (en) * | 2017-09-29 | 2018-02-09 | 北京石油化工学院 | A kind of handling process of VOCs waste gas |
| CN110975552A (en) * | 2019-12-11 | 2020-04-10 | 陈嘉斌 | Organic waste gas processor based on ethyl acetate and used for lining extraction, neutralization and ester scraping |
| CN111408236A (en) * | 2020-03-17 | 2020-07-14 | 上海汉洁环境工程有限公司 | Waste gas absorption liquid for volatile organic gas treatment |
| CN111871151A (en) * | 2020-07-22 | 2020-11-03 | 循天能源环境科技有限公司 | Absorption treatment method for VOCs organic waste gas |
| CN112807940A (en) * | 2020-12-31 | 2021-05-18 | 南京都乐制冷设备有限公司 | Method for treating VOCs waste gas containing light alkane |
| CN113546935A (en) * | 2021-08-18 | 2021-10-26 | 广东瀚宇能源应用技术有限公司 | Unburned methanol cleaning structure of hearth of methanol hot-blast stove |
| CN113546935B (en) * | 2021-08-18 | 2024-05-31 | 广东瀚宇新能源装备有限公司 | Unburned methanol cleaning structure for hearth of methanol hot-blast stove |
| CN114210174A (en) * | 2021-11-10 | 2022-03-22 | 生态环境部华南环境科学研究所 | Absorption/adsorption coupling reinforced stink and organic waste gas treatment method |
| CN114210174B (en) * | 2021-11-10 | 2023-08-04 | 生态环境部华南环境科学研究所 | Malodor and organic waste gas treatment method with enhanced absorption/adsorption coupling |
| CN115445392A (en) * | 2022-09-30 | 2022-12-09 | 上海化工研究院有限公司 | Recycling treatment process for chlorine-containing volatile organic compound waste gas |
| CN116078118A (en) * | 2023-04-10 | 2023-05-09 | 佛山市大随环保科技有限公司 | Organic waste gas treatment system and method |
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Application publication date: 20110914 |