CN102086417A - Method for purifying marsh gas and recovering elemental sulfur and carbon dioxide - Google Patents
Method for purifying marsh gas and recovering elemental sulfur and carbon dioxide Download PDFInfo
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- CN102086417A CN102086417A CN 200910231354 CN200910231354A CN102086417A CN 102086417 A CN102086417 A CN 102086417A CN 200910231354 CN200910231354 CN 200910231354 CN 200910231354 A CN200910231354 A CN 200910231354A CN 102086417 A CN102086417 A CN 102086417A
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Abstract
The invention discloses a method for purifying marsh gas and recovering elemental sulfur and carbon dioxide, mainly comprising the technical steps of gas-liquid separation, gas supercharging, gas purification, decarbonization and desulfurization, Clinsulf process sulfur recovery, carbon dioxide liquefaction and the like, and specifically comprising the steps of enabling previous-system anaerobic fermentation marsh gas subjected to the gas-liquid separation and supercharging to be in counter current contact with an absorption liquid in an absorbing tower, and removing the carbon dioxide and hydrogen sulfide in the marsh gas, wherein the purified and supercharged marsh gas can be used as fuel gas for automobiles; the heated absorption liquid is desorbed in the absorbing tower, the gas mixture of the carbon dioxide and the hydrogen sulfide from the desorption process is heated by a marsh gas boiler and then is reacted with quantitative hot air through a Clinsulf reactor, the gas mixture is cooled by a Clinsulf cooler to separate the elemental sulfur, and the residual carbon dioxide is compressed and liquefied by a compressor so as to be stored in a gas holder.
Description
Technical field
The invention belongs to high density organic waste treatment technology process matched therewith, relate to and adopt chemical absorption method to remove a kind of processing method that process combination that carbonic acid gas and hydrogen sulfide, Clinsulf technology reclaims sulphur, pressurized liquefied recovery carbonic acid gas purified and reclaimed elemental sulfur and carbonic acid gas in the biogas.
Background technology
Biogas fermentation technical finesse high density organic waste (feces of livestock and poultry; organic waste; stalk etc.) can produce great number of flammable gas-biogas; therefore thereby can be with biogas as a kind of new forms of energy alleviating energy crisis that is used; but because organic waste are produced in the biogas in fermentation; also can produce carbon dioxide and hydrogen sulfide thereupon; this part gas is burning; generating or can be oxidized to when being converted into other energy and have corrosive sour gas; thereby combustion equipment is caused serious corrosion, also can affect simultaneously surrounding environment.In order to handle carbonic acid gas and the hydrogen sulfide in the anaerobically fermenting biogas, now generally in the following ways: with thionizer remove hydrogen sulfide other, the direct burning and exhausting of carbonic acid gas.Though adopt such treatment process can effectively remove hydrogen sulfide in the biogas, minimizing is to the corrosion of equipment, but but do not reach the hydrogen sulfide that reclaims in the biogas and the order ground of carbonic acid gas, caused wasting of resource, increased pollution yet for environment.
Summary of the invention
Produce many deficiencies and the incomplete problem to existing in marsh gas purifying and recovery elemental sulfur and the carbon dioxide process in the biogas at existing anaerobically fermenting, the invention provides the processing method of a kind of marsh gas purifying and recovery elemental sulfur and carbonic acid gas.Adopt this technology, not only can use as vehicle fuel by purifying marsh gas, and can reclaim and obtain elemental sulfur and liquid carbon dioxide fertilizer.
The processing method of marsh gas purifying provided by the present invention and recovery elemental sulfur and carbonic acid gas, its concrete processing step is:
1 gas-liquid separation
The biogas that anaerobically fermenting is obtained passes through air water separator, and the water vapour in the biogas is separated;
2 gas boostings
After biogas carried out supercharging with booster fan, be transported to gas sweetening decarbonization, desulfuration unit.
3 gas sweetening decarbonization, desulfurations
With the biogas after the supercharging, feed the absorption tower.With top-down organic amine absorption liquid counter current contact, carbonic acid gas in the biogas and hydrogen sulfide are absorbed by the organic amine alkaline absorption solution in the absorption tower.High purity biogas after the purification through absorber cooler cooling, absorption tower separator separate dewater after, pressurized sending outside as vehicle fuel.After being heated, the organic amine alkali lye that contains hydrogen sulfide and carbonic acid gas is sent to the desorption tower heating desorption in interchanger, the mixed gas of separating sucking-off carbonic acid gas and hydrogen sulfide cools off through the desorption tower water cooler, after the desorption tower separator dewaters, be sent to Clinsulf reactor oxidation of sulfureted hydrogen.
4Clinsulf technology reclaims sulphur
The mixed gas that contains hydrogen sulfide and carbonic acid gas is delivered to the Clinsulf reactor with the quantitative air mixed of preheating, at this H behind methane boiler direct heating to 220 ℃
2The S direct oxidation, by a built-in Clinsulf water cooler, the controlling reactor temperature out is separated out elemental sulfur a little more than the dew-point temperature of sulphur at separator, the heat of cooling reactor is removed with water coolant, and a large amount of hot water of generation is used for anaerobic fermentation system insulation heating.
5 co 2 liquefactions
The gas mixture that removes hydrogen sulfide contains highly purified carbon dioxide, and compressed machine is pressurized liquefied to be stored in steel cylinder and the gas holder, is used for booth for nitrogen, carbon back fertilizer, liquid fertilizer etc.
Advantage of the present invention: 1, single stage method has realized the marsh gas purifying desulfurization and decarburization, has reduced process procedure; 2, this process unit can match with the biogas fermentation engineering, has strengthened the effect of harmless treatment.3, purified marsh gas purity can reach 99.5%, can pressurize and use as vehicle fuel, has saved the oil and natural gas resource; 4, reclaim the carbonic acid gas that has obtained elemental sulfur and liquefaction.Elemental sulfur is a main raw material of producing sulfuric acid and fertilizer, and the carbonic acid gas of liquefaction can be used for developing saturated arbon dioxide solution fertilizer, compound carbon back fertilizer and pours into steel cylinder and is used for warmhouse booth carbonating etc., has considerable income.
Description of drawings
Accompanying drawing is a process flow sheet of the present invention
1, air water separator; 2, booster fan; 3, absorption tower; 4, absorber cooler; 5, absorption tower separator; 6, interchanger; 7, desorption tower; 8, desorption tower well heater; 9, desorption tower water cooler; 10, desorption tower separator; 11, methane boiler; 12, Clinsulf reactor; 13, Clinsulf water cooler; 14, separator; 15, compressor; 16, gas-holder.
Embodiment
The present invention is a kind of marsh gas purifying and the processing method that reclaims elemental sulfur and carbonic acid gas, comprise that mainly gas-liquid separation, gas boosting, gas sweetening decarbonization, desulfuration, Clinsulf technology reclaim processing steps such as sulphur, co 2 liquefaction, system's anaerobically fermenting biogas is after the gas-liquid separation supercharging before being about to, in the absorption tower with the absorption liquid counter current contact, remove carbonic acid gas and hydrogen sulfide in the biogas, purify back biogas supercharging and can be used for vehicle fuel; Desorb takes place at desorption tower through heating in absorption liquid, carbonic acid gas that desorbs and hydrogen sulfide gas mixture heat through methane boiler, with quantitative warm air through the Clinsulf reactor reaction, Clinsulf water cooler refrigerated separation obtains elemental sulfur, and the compressed machine of residual carbon dioxide compresses and liquefies and is stored in gas-holder.
Its specific embodiment is as follows:
1 gas-liquid separation
The biogas that anaerobically fermenting is obtained passes through air water separator 1, and the water vapour in the biogas is separated;
2 gas boostings
After biogas carried out supercharging with booster fan 2, be transported to gas sweetening decarbonization, desulfuration unit.
3 gas sweetening decarbonization, desulfurations
With the biogas after the supercharging, feed absorption tower 3.With top-down organic amine absorption liquid counter current contact, carbonic acid gas in the biogas and hydrogen sulfide are absorbed by the organic amine alkaline absorption solution in the absorption tower.High purity biogas after the purification through absorber cooler 4 cooling, absorption tower separator 5 separate dewater after, pressurized sending outside as vehicle fuel.After being heated, the organic amine alkali lye that contains hydrogen sulfide and carbonic acid gas is sent to desorption tower 7 heating desorptions in interchanger 6, the mixed gas of separating sucking-off carbonic acid gas and hydrogen sulfide is through 9 coolings of desorption tower water cooler, after desorption tower separator 10 dewaters, be sent to Clinsulf reactor 11 oxidation of sulfureted hydrogen.
4Clinsulf technology reclaims sulphur
The mixed gas that contains hydrogen sulfide and carbonic acid gas is delivered to Clinsulf reactor 12 with the quantitative air mixed of preheating, at this H behind methane boiler 11 direct heating to 220 ℃
2The S direct oxidation, by a built-in Clinsulf water cooler 13, the controlling reactor temperature out is separated out elemental sulfur a little more than the dew-point temperature of sulphur at separator 14, the heat of cooling reactor is removed with water coolant, and a large amount of hot water of generation is used for anaerobic fermentation system insulation heating.
5 co 2 liquefactions
The gas mixture that removes hydrogen sulfide contains highly purified carbon dioxide, compressed machine 15 pressurized liquefied being stored in the gas-holder 16.
The link of carbonic acid gas and elemental sulfur in the described cover purification recovery biogas, this biogas derives from the anaerobically fermenting link.
Described marsh gas purifying link comprises physical method and chemical process, permits adding one or more amine absorbents.
Described elemental sulfur reclaims link, includes but not limited to Clinsulf technology, can select different Clinsulf process combination according to the concentration of hydrogen sulfide.
Described ammonia reclaims link, includes but are not limited to the supercharging liquefying plant, feeds basic solution after also can supercharging to produce carbon back fertilizer
Described recovery technology comprises one or more heat recovery device, and waste heat is used for the anaerobically fermenting heating.
Claims (6)
1. a marsh gas purifying and reclaim the technology of elemental sulfur and carbonic acid gas is characterized in that, comprising:
The first step, gas-liquid separation.The biogas that anaerobically fermenting is obtained passes through air water separator 1, and the water vapour in the biogas is separated;
Second step, gas boosting.After biogas carried out supercharging with booster fan 2, be transported to gas sweetening decarbonization, desulfuration unit.
The 3rd step, gas sweetening decarbonization, desulfuration.With the biogas after the supercharging, feed absorption tower 3.With top-down organic amine absorption liquid counter current contact, carbonic acid gas in the biogas and hydrogen sulfide are absorbed by the organic amine alkaline absorption solution in the absorption tower.High purity biogas after the purification through absorber cooler 4 cooling, absorption tower separator 5 separate dewater after, pressurized sending outside as vehicle fuel.After being heated, the organic amine alkali lye that contains hydrogen sulfide and carbonic acid gas is sent to desorption tower 7 heating desorptions in interchanger 6, the mixed gas of separating sucking-off carbonic acid gas and hydrogen sulfide is through 9 coolings of desorption tower water cooler, after desorption tower separator 10 dewaters, be sent to Clinsulf reactor 11 oxidation of sulfureted hydrogen.
The 4th step, Clinsulf technology reclaim sulphur.The mixed gas that contains hydrogen sulfide and carbonic acid gas is delivered to Clinsulf reactor 12 with the quantitative air mixed of preheating, at this H behind methane boiler 11 direct heating to 220 ℃
2The S direct oxidation, by a built-in Clinsulf water cooler 13, the controlling reactor temperature out is separated out elemental sulfur a little more than the dew-point temperature of sulphur at separator 14, the heat of cooling reactor is removed with water coolant, and a large amount of hot water of generation is used for anaerobic fermentation system insulation heating.
The 5th step, co 2 liquefaction.The gas mixture that removes hydrogen sulfide contains highly purified carbon dioxide, compressed machine 15 pressurized liquefied being stored in the gas-holder 16.
2. purify the link that reclaims carbonic acid gas and elemental sulfur in the biogas as a cover as described in claims 1, this biogas derives from the anaerobically fermenting link.
3. comprise physical method and chemical process as marsh gas purifying link as described in claims 1, permit adding one or more amine absorbents.
4. reclaim link as claims 1 described elemental sulfur, include but not limited to Clinsulf technology, can select different Clinsulf process combination according to the concentration of hydrogen sulfide.
5. reclaim link as ammonia as described in claims 1, include but are not limited to the supercharging liquefying plant, feed basic solution after also can supercharging to produce carbon back fertilizer.
6. comprise one or more heat recovery device as claims 1 described recovery technology, waste heat is used for the anaerobically fermenting heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200910231354 CN102086417A (en) | 2009-12-02 | 2009-12-02 | Method for purifying marsh gas and recovering elemental sulfur and carbon dioxide |
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| CN 200910231354 CN102086417A (en) | 2009-12-02 | 2009-12-02 | Method for purifying marsh gas and recovering elemental sulfur and carbon dioxide |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103113945A (en) * | 2013-02-01 | 2013-05-22 | 王仕华 | Marsh gas purification system and marsh gas purification method |
| CN104932570A (en) * | 2015-06-26 | 2015-09-23 | 中国石油大学(北京) | Trace biomass thermal splitting and sulfide collecting device and method |
| CN105734082A (en) * | 2016-02-03 | 2016-07-06 | 沂南县沂蒙医药包装有限公司 | Ampoule workshop waste heat utilization method and utilization system thereof |
| CN107337480A (en) * | 2016-04-29 | 2017-11-10 | 扬州宇家环保科技有限公司 | A kind of poultry manure handling process |
| CN107715671A (en) * | 2017-09-25 | 2018-02-23 | 江苏河海新能源股份有限公司 | Hydrogen sulphide removal unit |
| CN110127623A (en) * | 2018-02-09 | 2019-08-16 | 中国石油化工股份有限公司 | The method of plasma decomposing hydrogen sulfide |
| CN110548370A (en) * | 2019-09-04 | 2019-12-10 | 大连理工大学 | Acid gas purification process and device for producing hydrogen sulfide with various purities |
| CN111013311A (en) * | 2019-12-26 | 2020-04-17 | 四川深蓝环保科技有限公司 | Advanced treatment system and method for hydrothermal waste gas |
-
2009
- 2009-12-02 CN CN 200910231354 patent/CN102086417A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103113945A (en) * | 2013-02-01 | 2013-05-22 | 王仕华 | Marsh gas purification system and marsh gas purification method |
| CN103113945B (en) * | 2013-02-01 | 2015-04-08 | 王仕华 | Marsh gas purification system and marsh gas purification method |
| CN104932570A (en) * | 2015-06-26 | 2015-09-23 | 中国石油大学(北京) | Trace biomass thermal splitting and sulfide collecting device and method |
| CN105734082A (en) * | 2016-02-03 | 2016-07-06 | 沂南县沂蒙医药包装有限公司 | Ampoule workshop waste heat utilization method and utilization system thereof |
| CN105734082B (en) * | 2016-02-03 | 2020-01-24 | 沂南县沂蒙医药包装有限公司 | Ampoule workshop waste heat utilization method and utilization system thereof |
| CN107337480A (en) * | 2016-04-29 | 2017-11-10 | 扬州宇家环保科技有限公司 | A kind of poultry manure handling process |
| CN107715671A (en) * | 2017-09-25 | 2018-02-23 | 江苏河海新能源股份有限公司 | Hydrogen sulphide removal unit |
| CN107715671B (en) * | 2017-09-25 | 2020-11-17 | 江苏河海新能源股份有限公司 | Hydrogen sulfide removing device |
| CN110127623A (en) * | 2018-02-09 | 2019-08-16 | 中国石油化工股份有限公司 | The method of plasma decomposing hydrogen sulfide |
| CN110127623B (en) * | 2018-02-09 | 2021-09-14 | 中国石油化工股份有限公司 | Method for decomposing hydrogen sulfide by plasma |
| CN110548370A (en) * | 2019-09-04 | 2019-12-10 | 大连理工大学 | Acid gas purification process and device for producing hydrogen sulfide with various purities |
| CN111013311A (en) * | 2019-12-26 | 2020-04-17 | 四川深蓝环保科技有限公司 | Advanced treatment system and method for hydrothermal waste gas |
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Application publication date: 20110608 |