CN102161925A - Process for producing biological natural gas by using methane - Google Patents
Process for producing biological natural gas by using methane Download PDFInfo
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- CN102161925A CN102161925A CN2011100605068A CN201110060506A CN102161925A CN 102161925 A CN102161925 A CN 102161925A CN 2011100605068 A CN2011100605068 A CN 2011100605068A CN 201110060506 A CN201110060506 A CN 201110060506A CN 102161925 A CN102161925 A CN 102161925A
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- natural gas
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- methane
- absorption tower
- biogas
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Abstract
The invention belongs to the technical field of biological natural gas production and particularly relates to a process for producing biological natural gas by using methane. The process comprises the following steps: removing solid impurities from the methane by using a filter; performing dry-process desulfuration; compressing the methane by a compressor till 0.8 to 1.5MPa; allowing the pressurized methane to enter an absorption tower from the lower part of the absorption tower to undergo spray washing; and finally, absorbing by a molecular sieve, drying and dewatering. In the invention, the biological natural gas is produced by using methane, the process flow is simple, the operation is safe, the recovery rate of the product gas is high, environmental pollution is avoided, and the process is in accordance with national standards.
Description
Technical field
The invention belongs to the technical field of producing bio-natural gas, be specifically related to a kind of technology of utilizing the biogas production bio-natural gas.
Background technology
In the face of the worldwide energy and climate crisis, China makes great adjustment to energy structure during " 12 ".And the preferred manner that reduces discharging intensity is the energy structure that changes based on coal, oil, reduces carbon emission intensity from feed end, increases the renewable energy source of introducing clean.Biogas is used and is just being met this feature, therefore country's " 12 " biogas construction of will making overall planning, the energy construction of attaching most importance to biogas is included in country " 12 " energy development strategy, when formulating energy development planning, put into effect support policy and arranging project funds, favour.
The biogas isolation of purified is produced the bio-natural gas technology, be based on marsh gas purifying construction investment, working cost is low, product recovery rate is high requirement, be based on advanced technology, safe and effective, system is reliable, environmentally safe, the aim being convenient to promote are innovated.Because raw material biogas complicated component should carry out purifying treatment to biogas earlier, the purification of biogas mainly is to the H in the biogas
2S, CO
2, H
2The removal of O.Desulfurization is for fear of etching apparatus and H
2S poisons, if SO is emitted in the biogas burning
2And SO
3, can compare H
2S causes bigger harm, because SO
2Can reduce dew point, sulfuric acid has highly corrosive; Dehydration is can dissolve H because if accumulated water in the airway
2S and corrosion pipeline when the pressurized storage of biogas, in order to prevent the freezing gas-holder of condensed water, also must be removed water in addition; Remove CO in the biogas
2Be because CO
2Reduced the energy density of biogas, by removing CO
2Can improve the Energy value of unit volume gas, make it become " green energy resource ", reach the standard of bio-natural gas.
Summary of the invention
The object of the present invention is to provide a kind of technology of utilizing the biogas production bio-natural gas.
For reaching above-mentioned purpose, the present invention by the following technical solutions:
A kind of technology of utilizing the biogas production bio-natural gas, biogas is removed solid impurity through filter, and compressed machine is compressed to 0.8-1.5MPa, carries out dry desulfurization then, enter the absorption tower by the bottom, absorption tower again and spray washing, adopt the molecular sieve adsorption drying and dehydrating at last.
Water temperature when described spray is washed is 4-10 ℃.
Water after the described spray washing is got back to the normal pressure Analytic Tower and is discharged CO
2, being pressurized to 1.1-1.8MPa by water pump, the pressure of water pump is higher than the pressure of compressor, removes the absorption tower spray when being cooled to 4-10 ℃ by handpiece Water Chilling Units more again, forms the water route circulation.
The sweetening agent that adopts during described dry desulfurization is a ferric oxide desulfurizer.
The present invention adopts the mode of dry desulfurization, can reduce personnel's input, regularly reloads.Biogas to be clean contains H
2S allows up to 5000mg/Nm
3, purify back gas H
2S content≤15ppm, the desulfurization precision height, turndown ratio is big.Adopt molecular sieve adsorbing and dewatering, in the moisture, all right absorbed portion acidic components improve gas purification degree in removing biogas; Simultaneously, do not have chemical reaction in the adsorption process, rate of adsorption is fast, and the running balance between each the phase material that participates in adsorbing is finished fast, and technical process is simple, and is easy to operate.Biogas behind the dry desulfurization can increase CO through pressurization
2With the solubleness of H2S in water, can effective elimination CO after the spray washing
2With remaining H2S, product purity is greater than 97%, CH
4Yield is greater than 95.6%.Because compressor exit temperature is higher, circulating water temperature will constantly rise in summer, can influence the purity of product gas.Select temperature 4-10 ℃ water temperature on the low side, can obtain higher yield and product gas purity, reduce quantity of circulating water.Simultaneously, select 4-10 ℃ spray water temperature, both can be the product gas dehydration and reduced fixed investment and working cost, also can avoid adopting lower water temperature to cause refrigeration techniques complexity, energy consumption to rise.Water after the spray washing is got back to the normal pressure Analytic Tower and is discharged CO
2, when being cooled to 4-10 ℃, water pump supercharging, handpiece Water Chilling Units remove the absorption tower spray again, form the water route circulation.The present invention utilizes the technical process of biogas production bio-natural gas simple, operational safety, and the product gas rate of recovery is higher, environmentally safe.
Embodiment
Embodiment 1
Utilize the technology of biogas production bio-natural gas, biogas is removed solid impurity through filter, compressed machine is compressed to 1.5MPa, adopt ferric oxide desulfurizer to carry out dry desulfurization then, entering the absorption tower by the bottom, absorption tower again, to adopt temperature be that 4 ℃ water sprays washing, adopts the molecular sieve adsorption drying and dehydrating.Product after testing, CH
4Purity be 99%, yield is 93%.
Water after the spray washing is got back to the normal pressure Analytic Tower and is discharged CO
2, be pressurized to 1.8MPa by water pump, remove the absorption tower spray when being cooled to 4 ℃ by handpiece Water Chilling Units more again, form the water route circulation.
Embodiment 2
Utilize the technology of biogas production bio-natural gas, biogas is removed solid impurity through filter, compressed machine is compressed to 1.1MPa, adopt ferric oxide desulfurizer to carry out dry desulfurization then, entering the absorption tower by the bottom, absorption tower again, to adopt temperature be that 7 ℃ water sprays washing, adopts the molecular sieve adsorption drying and dehydrating.Product after testing, CH
4Purity be 98%, yield is 95.6%.
Water after the spray washing is got back to the normal pressure Analytic Tower and is discharged CO
2, be pressurized to 1.4MPa by water pump, remove the absorption tower spray when being cooled to 8 ℃ by handpiece Water Chilling Units more again, form the water route circulation.
Embodiment 3
Utilize the technology of biogas production bio-natural gas, biogas is removed solid impurity through filter, compressed machine is compressed to 0.8MPa, adopt ferric oxide desulfurizer to carry out dry desulfurization then, entering the absorption tower by the bottom, absorption tower again, to adopt temperature be that 10 ℃ water sprays washing, adopts the molecular sieve adsorption drying and dehydrating.Product after testing, CH
4Purity be 97%, yield is 97%.
Water after the spray washing is got back to the normal pressure Analytic Tower and is discharged CO
2, be pressurized to 1.1MPa by water pump, remove the absorption tower spray when being cooled to 10 ℃ by handpiece Water Chilling Units more again, form the water route circulation.
Claims (4)
1. technology of utilizing the biogas production bio-natural gas, it is characterized in that: biogas is removed solid impurity through filter, and compressed machine is compressed to 0.8-1.5MPa, carries out dry desulfurization then, enter the absorption tower by the bottom, absorption tower again and spray washing, adopt the molecular sieve adsorption drying and dehydrating at last.
2. the technology of utilizing the biogas production bio-natural gas as claimed in claim 1 is characterized in that: the water temperature when described spray is washed is 4-10 ℃.
3. the technology of utilizing the biogas production bio-natural gas as claimed in claim 1 or 2 is characterized in that: the water after the described spray washing is got back to the normal pressure Analytic Tower and is discharged CO
2, being pressurized to 1.1-1.8MPa by water pump, the pressure of water pump is higher than the pressure of compressor, removes the absorption tower spray when being cooled to 4-10 ℃ by handpiece Water Chilling Units more again, forms the water route circulation.
4. the technology of utilizing the biogas production bio-natural gas as claimed in claim 3 is characterized in that: the sweetening agent that adopts during described dry desulfurization is a ferric oxide desulfurizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100605068A CN102161925A (en) | 2011-03-14 | 2011-03-14 | Process for producing biological natural gas by using methane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100605068A CN102161925A (en) | 2011-03-14 | 2011-03-14 | Process for producing biological natural gas by using methane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102161925A true CN102161925A (en) | 2011-08-24 |
Family
ID=44463380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100605068A Pending CN102161925A (en) | 2011-03-14 | 2011-03-14 | Process for producing biological natural gas by using methane |
Country Status (1)
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| CN (1) | CN102161925A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102586334A (en) * | 2012-02-17 | 2012-07-18 | 江南大学 | Method for producing biogas from kitchen wastes by anaerobic fermentation |
| CN102660342A (en) * | 2012-05-18 | 2012-09-12 | 常熟理工学院 | Method and device for atomizing and purifying marsh gas |
| CN102876413A (en) * | 2012-09-26 | 2013-01-16 | 开封黄河空分集团有限公司 | Biogas decarburization two-stage desorption process |
| CN102895866A (en) * | 2012-09-27 | 2013-01-30 | 开封黄河空分集团有限公司 | Dry-method desulfuration technology for methane |
| CN103320193A (en) * | 2013-07-05 | 2013-09-25 | 苏州苏净保护气氛有限公司 | Device and method for manufacturing high quality natural gas by purifying methane |
| CN106190384A (en) * | 2016-08-05 | 2016-12-07 | 成都天成碳化工有限公司 | The methane purification natural gas method of high-recovery |
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| EP0263796A1 (en) * | 1986-10-08 | 1988-04-13 | Ente per le nuove tecnologie, l'energia e l'ambiente ( ENEA) | Process and device for producing a biological gas from the anaerobical digestion of an organic substance |
| RU2093564C1 (en) * | 1995-03-07 | 1997-10-20 | Виктор Игнатьевич Тумченок | Household methane tank |
| CN1928037A (en) * | 2006-08-10 | 2007-03-14 | 蒋钧 | Preparation method of artificial natural gas |
| CN101016491A (en) * | 2007-02-09 | 2007-08-15 | 山东十方新能源有限公司 | Process of preparing natural gas from alcohol methane |
| CN201003050Y (en) * | 2007-02-06 | 2008-01-09 | 东莞市康达机电工程有限公司 | Processing apparatus for producing sulfur-free natural gas using methane |
| CN101475859A (en) * | 2009-01-21 | 2009-07-08 | 东莞市康达机电工程有限公司 | Method and apparatus for preparing sulfur-free natural gas from methane |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0263796A1 (en) * | 1986-10-08 | 1988-04-13 | Ente per le nuove tecnologie, l'energia e l'ambiente ( ENEA) | Process and device for producing a biological gas from the anaerobical digestion of an organic substance |
| RU2093564C1 (en) * | 1995-03-07 | 1997-10-20 | Виктор Игнатьевич Тумченок | Household methane tank |
| CN1928037A (en) * | 2006-08-10 | 2007-03-14 | 蒋钧 | Preparation method of artificial natural gas |
| CN201003050Y (en) * | 2007-02-06 | 2008-01-09 | 东莞市康达机电工程有限公司 | Processing apparatus for producing sulfur-free natural gas using methane |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102586334A (en) * | 2012-02-17 | 2012-07-18 | 江南大学 | Method for producing biogas from kitchen wastes by anaerobic fermentation |
| CN102586334B (en) * | 2012-02-17 | 2013-10-16 | 江南大学 | Method for producing biogas from kitchen wastes by anaerobic fermentation |
| CN102660342A (en) * | 2012-05-18 | 2012-09-12 | 常熟理工学院 | Method and device for atomizing and purifying marsh gas |
| CN102876413A (en) * | 2012-09-26 | 2013-01-16 | 开封黄河空分集团有限公司 | Biogas decarburization two-stage desorption process |
| CN102895866A (en) * | 2012-09-27 | 2013-01-30 | 开封黄河空分集团有限公司 | Dry-method desulfuration technology for methane |
| CN103320193A (en) * | 2013-07-05 | 2013-09-25 | 苏州苏净保护气氛有限公司 | Device and method for manufacturing high quality natural gas by purifying methane |
| CN103320193B (en) * | 2013-07-05 | 2015-03-25 | 苏州苏净保护气氛有限公司 | Device and method for manufacturing high quality natural gas by purifying methane |
| CN106190384A (en) * | 2016-08-05 | 2016-12-07 | 成都天成碳化工有限公司 | The methane purification natural gas method of high-recovery |
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Address after: 475004 No. 33 Songcheng Avenue, Kaifeng City, Henan Province Applicant after: Kaifeng Huanghe Air Separation Group Co., Ltd. Address before: West Development Zone, Henan province 475000 City Road No. 4 song Applicant before: Kaifeng Huanghe Air Separation Group Co., Ltd. |
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Application publication date: 20110824 |