CN102764565A - Method for processing malodorous gas - Google Patents
Method for processing malodorous gas Download PDFInfo
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- CN102764565A CN102764565A CN2011101145150A CN201110114515A CN102764565A CN 102764565 A CN102764565 A CN 102764565A CN 2011101145150 A CN2011101145150 A CN 2011101145150A CN 201110114515 A CN201110114515 A CN 201110114515A CN 102764565 A CN102764565 A CN 102764565A
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Abstract
Malodorous gases are entered into a primary absorption tower and countercurrent contact with a first absorbent sprayed from the top of the tower. Alkaline gases like ammonia or acid gases like hydrogen sulfide in the malodorous gases are absorbed. The liquid in the absorption tower is discharged into an absorbent tank. The absorbent in the absorbent tank is recycled. Simultaneously, oxidants are continuously filled into the absorbent tank, so that the absorbed alkaline gases or acid gases can be fully oxidized and decomposed. The gas phase passed through the primary absorption tower is discharged from the upper portion of the primary absorption tower into a secondary absorption tower. The gases entered the secondary absorption tower are countercurrent contact with a second absorbent sprayed from the top of the tower. Hydrocarbons, halohydrocarbons, oxygenated organic compounds and the like in the malodorous gases are absorbed. The liquid in the absorption tower is discharged into the absorbent tank. The absorbent in the absorbent tank is recycled. The hydrocarbons and the oxygenated organic compounds in the saturated absorbent after absorption are recovered by a distillation method. The absorbent is also recycled. The gas phase passed through the secondary absorption tower is discharged from the upper portion of the secondary absorption tower.
Description
Technical field
The present invention relates to a kind of waste gas processing method, particularly a kind of method of handling foul gas.
Background technology
The odor pollutant that produces in the sewage disposal is that protein, fat, carbohydrate are by microbial respiratory or ferment formed product and incomplete product.According to the chemical composition of odorous substance, can it be divided into five types, the one, sulfur-containing compound is like hydrogen sulfide, mercaptan, thioether and thiophene etc.; The 2nd, nitrogen-containing compound is like ammonia, amine, acid amides and indoles etc.; Three halogens and derivative thereof are like chlorine, halogenated hydrocarbons etc.; The 4th, hydrocarbon compound is like alkane, alkene, alkynes and aromatic hydrocarbon (like benzene, toluene class) etc.; The 5th, oxygen-bearing organic matter, like alcohol, aldehyde, ketone, phenol and organic acid etc., these materials extensively exist in Sewage Biological Treatment equipment.
The traditional handicraft method commonly used of handling foul gas at present has: WATER-WASHING METHOD, cooling method, absorption method, energetic ion method, bioanalysis, chemical absorption method, oxidizing process and firing method etc.WATER-WASHING METHOD, absorption efficiency are not high, are of limited application; Cooling method, efficient is low, and weak effect can not satisfy processing requirements; Absorption method, it is little to handle load, and running cost is high, is not suitable for handling big flow, the foul gas of high concentration; The energetic ion method is the method for the chamber of experimentizing research recent years, but only is applicable to organic low concentration macromolecule pollutant, and equipment investment is bigger; The bioanalysis technology is immature and only be applicable to biodegradable water-soluble low concentration foul gas, and the difficulty of operation maintenance simultaneously is big, and device starts slow; Firing method is invested high reason application and also is restricted because of complex process; Using at present maximum in commercial production and the sewage disposal process is chemical absorption method, and chemical absorption method is because of using traditional absorbent, and absorption efficiency is not high, absorbs the back waste liquid and deficiency such as need handle and be restricted.In actual motion, what usually run into is high concentration, big air quantity, the unsettled foul gas of content, and in this case, it is optimum adopting the technology of the liquid absorption method and the oxidizing process comprehensive regulation.
Summary of the invention
Goal of the invention:, disclose a kind of effective treating method that is directed against the foul gas of heterogeneity to the deficiency of prior art.
Technical scheme: the invention discloses a kind of method of handling foul gas, may further comprise the steps:
(1) foul gas is entered the first absorbent counter current contacting of first absorption tower and cat head spray, the pernicious gas in the absorbing waste gas;
Treatment fluid in (2) first absorption towers enters the first absorbent storage tank, and the gas after handling through first absorption tower enters second absorption tower from the top on first absorption tower;
After treatment fluid in (3) the first absorbent storage tanks absorbs harmful exhaust and reaches capacity, realize first absorbent and be absorbed separating of organic solvent through distillation, make reuse behind first absorbent regeneration according to the difference of boiling point;
(4) in the absorbent storage tank, add oxidant, oxidant and organic solvent produce reaction, and oxidation in organic solvent is decomposed.
(5) gas after handling through first absorption tower gets into the absorbent counter current contacting that second absorption tower and cat head spray, and contains the oxygen organic gas in the absorbing waste gas;
Treatment fluid in (6) second absorption towers enters the second absorbent storage tank, and the gas after handling through second absorption tower is discharged from the top on second absorption tower;
After treatment fluid in (7) the second absorbent storage tanks absorbs organic exhaust gas and reaches capacity, realize second absorbent and be absorbed separating of organic solvent through distillation, make reuse behind second absorbent regeneration, reclaim organic solvent simultaneously according to the difference of boiling point.
First absorption tower or second absorption tower are a kind of in packed tower, spray column or the plate column.
The described organic exhaust gas of step (1) is NH
3Class alkaline gas or H
2S class sour gas.
Handle NH
3First absorbent of type alkaline gas is a kind of in the absorbents such as sulfuric acid, hydrochloric acid, hypochlorous acid, citric acid, and concentration is 1.0%～25.0%; Handle NH
3A kind of in clorox that can the oxidation alkaline gas, the calcium hypochlorite of the oxidant that adds during type alkaline gas, concentration is 10.0%～30.0%.
Handle H
2First absorbent of S class sour gas is a kind of in the absorbents such as NaOH, calcium hydroxide, sodium carbonate, and concentration is 5.0%～20.0%; Handle H
2The oxidant that adds during S class sour gas is a kind of in the hydrogen peroxide solution, Peracetic acid of oxidation sour gas, and concentration is 15.0%～35.0%.
Said second absorbent is a kind of in the absorbents such as used oil, biodiesel, diesel oil, gasoline, compound diesel, composite gasoline, rubber oil refining.
To the foul waste gas of different component, can select NH separately for use
3Class alkaline gas processing method or H
2S class sour gas processing method; Perhaps use NH successively
3Class alkaline gas processing method and H
2S class sour gas, the use order can be changed, and does not influence result.
Beneficial effect: adopt technical scheme of the present invention and optimized parameters, can be used for the processing of all kinds of foul gas of high concentration, big flow and complicated component.Handled foul gas has nitrogen-containing compound (ammonia, methylamine, dimethylamine, trimethylamine, ethamine, butylamine, dibutylamine, diisopropyl ammonia, indoles, acid amides etc.), sulfide is arranged (hydrogen sulfide, methyl mercaptan, ethyl mercaptan, propanethiol, methyl sulfide, benzenethiol, two sulphur bismethanes, dimethyl disulfide two sulphur bismethanes, dimethyl disulfide, sulfuration hexichol alkene, propyl group mercaptan, amyl mercaptan, benzyl mercaptan, 2-butylene mercaptan, benzenethiol, thiophene etc.), oxygen-bearing organic matter (alcohol, aldehyde, ketone, phenol and organic acid etc.) is arranged, halogen and derivative (chlorine, halogenated hydrocarbons etc.) thereof are arranged, one or more stench components in the hydrocarbon compound (alkane, alkene, alkynes and aromatic hydrocarbon etc.) are arranged.The present device small investment, compact equipment, easy and simple to handle, operating flexibility is big, and operating cost is low, and energy consumption is merely prior art 1/2～1/3; The absorbent utilization ratio is high, and the consumption of oxidant is little, and the discharging of waste liquid amount behind the absorption foul gas is little, and liquid waste processing is easy, can directly advance sewage disposal system and handle; Absorbent can pass through the distillating method regeneration.
Description of drawings
Accompanying drawing is the process chart of foul gas processing method.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is done further explanation.
Foul gas gets into the absorbent counter current contacting of first grade absorption tower and cat head spray, absorbs the NH in the foul gas
3The class alkaline gas; Liquid phase in the absorption tower enters the absorbent jar; Absorbent in the absorbent jar recycles, and mends into oxidant to the absorbent jar continuously simultaneously, makes the abundant oxidation Decomposition of absorbed alkaline gas in the absorbent; Discharge from the top on absorption tower through the gas phase behind the absorption tower, get into two-level absorption tower.Get into the absorbent counter current contacting of the gas and the cat head spray of two-level absorption tower, absorb the H in the foul gas
2S class sour gas; Liquid phase in the absorption tower enters the absorbent jar; Absorbent in the absorbent jar recycles, and mends into oxidant to the absorbent jar continuously simultaneously, makes the abundant oxidation Decomposition of absorbed sour gas in the absorbent; Discharge from the top on absorption tower through the gas phase behind the absorption tower, get into three grades of absorption towers.Get into the absorbent counter current contacting of the gas and the cat head spray on three grades of absorption towers; Gases such as the hydro carbons in the absorption foul gas, halogenated hydrocarbons, oxygen-bearing organic matter; Liquid phase in the absorption tower enters the absorbent jar, and the absorbent in the absorbent jar recycles, and the absorbent that absorbs after saturated utilizes distillating method to reclaim hydro carbons and oxygen-bearing organic matter; Make the absorbent regeneration reuse simultaneously, discharge from the top on absorption tower through the gas phase behind three grades of absorption towers.
Embodiment 1: utilize technology of the present invention, the foul gas of certain refuse depot is handled.
The exhaust emission of certain refuse depot has: NH
3Class alkaline gas (ammonia, methylamine, dimethylamine, trimethylamine, ethamine, butylamine, dibutylamine, diisopropyl ammonia, indoles, acid amides etc.)
From the waste gas of refuse depot, get into first grade absorption tower through the first grade absorption tower blower fan, squeezing into concentration under the cat head spray with circulating pump is 12% sulfuric acid counter current contacting; Alkaline gas gas in the absorbing waste gas, the liquid phase in the first grade absorption tower enters the absorption tower storage tank, and sulfuric acid is housed in storage tank; Sulfuric acid can be recycled, and the gas after absorbing through first grade absorption tower is discharged from the top on absorption tower, gets into two-level absorption tower; Gas and absorbent recirculation pump are squeezed into the biodiesel counter current contacting under the cat head spray; Contain oxygen organic gas gas in the absorbing waste gas, the 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.
Sulfuric acid absorption NH
3After the class alkaline gas reaches capacity, reclaim NH through distillating method
3The class alkaline gas distills out NH
3Sulfuric acid behind type alkaline gas is squeezed into reuse in the sulfuric acid storage tank, is 15% oxidant chloric acid sodium and organic solvent NH in the absorbent storage tank, adding concentration simultaneously
3The class alkaline gas produces reaction, and oxidation in organic solvent is decomposed; After biodiesel absorbs and to contain the oxygen organic gas and reach capacity, reclaim respectively through distillating method according to boiling point difference and to contain the oxygen organic gas, distill out the biodiesel that contains behind the oxygen organic gas and squeeze into reuse in the biodiesel storage tank; What distillation obtained contains the oxygen organic gas 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 of certain plant is handled.
The exhaust emission of certain plant has: H
2S class sour gas has sulfide (hydrogen sulfide, methyl mercaptan, ethyl mercaptan, propanethiol, methyl sulfide, benzenethiol, two sulphur bismethanes, dimethyl disulfide two sulphur bismethanes, dimethyl disulfide, sulfuration hexichol alkene, propyl group mercaptan, amyl mercaptan, benzyl mercaptan, 2-butylene mercaptan, benzenethiol, thiophene etc.).
Waste gas from certain plant extracts gets into first grade absorption tower through the first grade absorption tower blower fan, squeezes into the NaOH counter current contacting under the cat head spray, the H in the absorbing waste gas with circulating pump
2S class sour gas, the liquid phase in the first grade absorption tower enter the first absorption tower storage tank, and prepared sodium hydroxide solution in advance is housed in the sodium hydroxide solution storage tank; Sodium hydroxide solution can be recycled, and the gas after absorbing through first grade absorption tower is discharged from the top on absorption tower, gets into two-level absorption tower; Gas and absorbent circulating pump are squeezed into the composite gasoline counter current contacting under the cat head spray; Contain the oxygen organic gas in the absorbing waste gas, the liquid phase in the two-level absorption tower enters the composite gasoline storage tank, in the composite gasoline storage tank, composite gasoline is housed; Composite gasoline can be recycled, and the gas after absorbing through two-level absorption tower is discharged from the top on absorption tower.
Absorb H in the sodium hydroxide solution
2After S class sour gas reaches capacity, reclaim H respectively through distillating method according to boiling point difference
2S class sour gas distills out H
2S class sour gas has the sodium hydroxide solution behind the sulfide to enter reuse in the storage tank, in storage tank, mends concentration simultaneously and be 25% Peracetic acid oxidant and isolated H
2Oxidation in organic solvent is decomposed in the reaction of S class sour gas; After composite gasoline absorbs toluene and reaches capacity, reclaim toluene through distillating method, the composite gasoline that distills out behind the toluene is squeezed into reuse in the composite gasoline 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 foul gas, realize that specifically the method for this technical scheme and approach 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 improvement and retouching; These improvement and retouching also should be regarded as protection scope of the present invention, and all available prior art of each part not clear and definite in the present embodiment realizes.
Claims (8)
1. a method of handling foul gas is characterized in that, may further comprise the steps:
(1) foul gas is entered the first absorbent counter current contacting of first absorption tower and cat head spray, the pernicious gas in the absorbing waste gas;
Treatment fluid in (2) first absorption towers enters the first absorbent storage tank, and the gas after handling through first absorption tower enters second absorption tower from the top on first absorption tower;
After treatment fluid in (3) the first absorbent storage tanks absorbs harmful exhaust and reaches capacity, realize first absorbent and be absorbed separating of organic solvent through distillation, make reuse behind first absorbent regeneration according to the difference of boiling point;
(4) in the absorbent storage tank, add oxidant, oxidant and organic solvent produce reaction, and oxidation in organic solvent is decomposed;
(5) gas after handling through first absorption tower gets into the absorbent counter current contacting that second absorption tower and cat head spray, and contains the oxygen organic gas in the absorbing waste gas;
Treatment fluid in (6) second absorption towers enters the second absorbent storage tank, and the gas after handling through second absorption tower is discharged from the top on second absorption tower;
After treatment fluid in (7) the second absorbent storage tanks absorbs organic exhaust gas and reaches capacity, realize second absorbent and be absorbed separating of organic solvent through distillation, make reuse behind second absorbent regeneration, reclaim organic solvent simultaneously according to the difference of boiling point.
2. a kind of method of handling foul gas according to claim 1 is characterized in that, first absorption tower or second absorption tower are a kind of in packed tower, spray column or the plate column.
3. a kind of method of handling foul gas according to claim 1 is characterized in that, the described organic exhaust gas of step (1) is NH
3Class alkaline gas or H
2S class sour gas.
4. according to claim 1 or 3 described a kind of methods of handling foul gas, it is characterized in that, handle NH
3First absorbent of type alkaline gas is a kind of in the absorbents such as sulfuric acid, hydrochloric acid, hypochlorous acid, citric acid, and concentration is 1.0%～25.0%.
5. according to claim 1 or 3 described a kind of methods of handling foul gas, it is characterized in that, handle H
2First absorbent of S class sour gas is a kind of in the absorbents such as NaOH, calcium hydroxide, sodium carbonate, and concentration is 5.0%～20.0%.
6. according to claim 1 or 3 described a kind of methods of handling foul gas, it is characterized in that, handle NH
3A kind of in clorox that can the oxidation alkaline gas, the calcium hypochlorite of the oxidant that adds during type alkaline gas, concentration is 10.0%～30.0%.
7. according to claim 1 or 3 described a kind of methods of handling foul gas, it is characterized in that, handle H
2The oxidant that adds during S class sour gas is a kind of in the hydrogen peroxide solution, Peracetic acid of oxidation sour gas, and concentration is 15.0%～35.0%.
8. according to the said a kind of method of handling foul gas of claim 1, it is characterized in that said second absorbent is a kind of in the absorbents such as used oil, biodiesel, diesel oil, gasoline, compound diesel, composite gasoline, rubber oil refining.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101145150A CN102764565A (en) | 2011-05-05 | 2011-05-05 | Method for processing malodorous gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101145150A CN102764565A (en) | 2011-05-05 | 2011-05-05 | Method for processing malodorous gas |
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| CN102764565A true CN102764565A (en) | 2012-11-07 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103272463A (en) * | 2013-05-23 | 2013-09-04 | 杭州国泰环保科技有限公司 | Process for treating malodorous gases in sludge |
| CN103933851A (en) * | 2014-05-08 | 2014-07-23 | 徐国庆 | Waste gas treatment method in xanthate production |
| CN104083982A (en) * | 2014-07-15 | 2014-10-08 | 南京大学 | Method for absorbing and recycling medium-high-concentration organic solvent |
| CN104248906A (en) * | 2013-06-28 | 2014-12-31 | 中国石油天然气股份有限公司 | High-density intermittent discharging organic exhaust-gas treatment technology |
| CN104548875A (en) * | 2014-11-04 | 2015-04-29 | 华文蔚 | Method for purifying volatile organic poison gas |
| CN105903336A (en) * | 2016-05-30 | 2016-08-31 | 李景致 | Safe environment-friendly multifunctional leaking chlorine absorption device |
| CN105999756A (en) * | 2016-07-08 | 2016-10-12 | 北京沃太斯环保科技发展有限公司 | Movable petrochemical enterprise shutdown gas-sweeping processing device and process |
| CN106823737A (en) * | 2017-01-04 | 2017-06-13 | 长沙汇聚环境技术有限公司 | A kind of administering method of garbage transfer station foul gas |
| CN108939750A (en) * | 2018-06-25 | 2018-12-07 | 珠海恒基达鑫国际化工仓储股份有限公司 | A kind of condensate Deodor technique |
| 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 |
| CN114920386A (en) * | 2022-05-17 | 2022-08-19 | 四川省银河化学股份有限公司 | Method for desulfurizing hot spring water and co-producing sulfur soap |
| CN114950078A (en) * | 2022-06-14 | 2022-08-30 | 扬州联博药业有限公司 | Waste gas treatment process in doxycycline hydrochloride production |
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Patent Citations (2)
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| CN1509798A (en) * | 2002-12-25 | 2004-07-07 | 何培鎏 | Paint spraying exhaust treating process and apparatus thereof |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103272463B (en) * | 2013-05-23 | 2015-12-02 | 杭州国泰环保科技股份有限公司 | Foul gas treatment process in mud |
| CN103272463A (en) * | 2013-05-23 | 2013-09-04 | 杭州国泰环保科技有限公司 | Process for treating malodorous gases in sludge |
| CN104248906B (en) * | 2013-06-28 | 2017-06-06 | 中国石油天然气股份有限公司 | A kind of high concentration intermittent discharge VOCs treatment technique |
| CN104248906A (en) * | 2013-06-28 | 2014-12-31 | 中国石油天然气股份有限公司 | High-density intermittent discharging organic exhaust-gas treatment technology |
| CN103933851A (en) * | 2014-05-08 | 2014-07-23 | 徐国庆 | Waste gas treatment method in xanthate production |
| CN103933851B (en) * | 2014-05-08 | 2015-11-11 | 徐国庆 | The processing method of waste gas in xanthate production |
| CN104083982A (en) * | 2014-07-15 | 2014-10-08 | 南京大学 | Method for absorbing and recycling medium-high-concentration organic solvent |
| CN104548875A (en) * | 2014-11-04 | 2015-04-29 | 华文蔚 | Method for purifying volatile organic poison gas |
| CN105903336A (en) * | 2016-05-30 | 2016-08-31 | 李景致 | Safe environment-friendly multifunctional leaking chlorine absorption device |
| CN105999756A (en) * | 2016-07-08 | 2016-10-12 | 北京沃太斯环保科技发展有限公司 | Movable petrochemical enterprise shutdown gas-sweeping processing device and process |
| CN106823737A (en) * | 2017-01-04 | 2017-06-13 | 长沙汇聚环境技术有限公司 | A kind of administering method of garbage transfer station foul gas |
| CN108939750A (en) * | 2018-06-25 | 2018-12-07 | 珠海恒基达鑫国际化工仓储股份有限公司 | A kind of condensate Deodor technique |
| 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 |
| CN114920386A (en) * | 2022-05-17 | 2022-08-19 | 四川省银河化学股份有限公司 | Method for desulfurizing hot spring water and co-producing sulfur soap |
| CN114950078A (en) * | 2022-06-14 | 2022-08-30 | 扬州联博药业有限公司 | Waste gas treatment process in doxycycline hydrochloride production |
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Application publication date: 20121107 |