CN104927951A - Decarbonization and dehydration process for natural gas - Google Patents
Decarbonization and dehydration process for natural gas Download PDFInfo
- Publication number
- CN104927951A CN104927951A CN201510264155.0A CN201510264155A CN104927951A CN 104927951 A CN104927951 A CN 104927951A CN 201510264155 A CN201510264155 A CN 201510264155A CN 104927951 A CN104927951 A CN 104927951A
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- China
- Prior art keywords
- natural gas
- molecular sieve
- dehydration
- film
- decarburization
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
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- Drying Of Gases (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a membrane process decarbonization and dehydration-molecular sieve dehydration-combined process for natural gas. The process comprises the following steps of removing CO2 and H2S from wet natural gas from a natural gas transmission pipeline through a decarbonization membrane separator, then, removing most of moisture through a dehydration membrane separator, and then, performing deep dehydration through a molecular sieve dehydration tower. According to the process disclosed by the invention, the corrosion problem of pipelines and equipments in traditional decarbonization process can be effectively solved, and the problem that the service life of a molecular sieve in a dehydration process is short is solved.
Description
Technical field
The present invention relates to a kind of Sweet natural gas decarburization dewatering process, be specifically related to a kind of technique adopting membrane separation process decarburization, dehydration and molecular sieve dehydration to combine.
Background technology
From the Sweet natural gas of oil-gas field or long distance pipeline, main component is methane, also containing impurity such as a small amount of heavy hydrocarbon, carbonic acid gas, hydrogen sulfide, water, mercury.First must by CO during production natural gas liquids
2, moisture, heavy hydrocarbon, mercury etc. removes, to avoid CO
2, moisture, heavy hydrocarbon etc. freeze clog downstream pipeline and equipment at low temperatures, and the corrosion that sulphur, mercury etc. produce equipment.
Current natural qi exhaustion CO
2most employing hydramine method, adopts MDEA(N-methyldiethanolamine) solvent removal CO
2, the method removes CO
2need with special formula solvent, cost is very high, and MDEA solution also easy corroded pipeline and equipment.
Natural gas dehydration process, comparatively conventional is molecular sieve dehydration at present.Need after molecular sieve dehydration to regenerate.Molecular sieve is after Reusability and regeneration, and its dehydrating effect will decline, and improves regeneration temperature and can improve the loading capacity of molecular sieve after regeneration, but regeneration temperature high work-ing life that can shorten molecular sieve.
Summary of the invention
The object of this invention is to provide a kind of simple Sweet natural gas decarburization dewatering unit, solve the line equipment corrosion of traditional decarbonization process and dewatering process molecular sieve work-ing life short problem.
A kind of Sweet natural gas decarburization dewatering process of the present invention, its technical process is as follows.
The wet natural gas (pressure is about 4.5MPa) come from natural gas pipeline is filtered solid particulate by the pressure of self, sends into feed heater, is heated to 3-35 DEG C, sends into decarburization membrane separation apparatus, removes CO
2and H
2s, then send into dehydrated film separator, water is discharged by the per-meate side of film, enters water cooler cooling, then enters gas-liquid separator separates and go out waste water and CH
4, after the natural gas via dehydration of dehydrated film separator high pressure side, enter molecular sieve water separation tower by molecular sieve dehydration top of tower, carry out deep dehydration, discharged by molecular sieve dehydration tower bottom after dehydration.Dry gas after dehydration is divided into two strands, and one enters subsequent processing, and one resurgent gases as molecular sieve regenerates molecular sieve.
During regeneration, after the dry gas heater via heating of resurgent gases, enter molecular sieve water separation tower by molecular sieve dehydration tower bottom, then through molecular sieve dehydration top of tower out, through water cooler cooling, then go out waste water through gas-liquid separator separates, be then incorporated to film dehydration separator gas outlet pipeline.
The film that described decarburization membrane separation apparatus adopts is cellulose acetate membrane or polyimide film or polysulfone membrane, and this type of film is to CO
2and H
2the removal effect of S is fine.
The film that described dehydrated film separator adopts is cellulose acetate film.
Described molecular sieve water separation tower is two.
Molecular sieve water separation tower absorption and regenerative process, the turnover of material flows to contrary.
The moisture that dehydrated film separator removes goes out waste water and CH through gas-liquid separator separates again through water cooler cooling
4gas, the CH separated
4gas is admitted to molecular sieve water separation tower after joining with the Sweet natural gas of dehydrated film separator high pressure side again.At utmost alleviate CH in membrane separating process
4loss.
The present invention adopts membrane separation apparatus decarburization, selects CO
2and H
2s has better perviousness, and carrys out decarburization to Sweet natural gas main component without chemosmotic film, the pipeline that current Sweet natural gas decarburization can be avoided to adopt hydramine method to bring and equipment corrosion problem.Adopt film dehydration to combine with molecular sieve dehydration technology, first adopt membrane separation apparatus to remove most of moisture in Sweet natural gas, then adopt molecular sieve to carry out deep dehydration, effectively can reduce the working load of molecular sieve, prolongation molecular sieve work-ing life.
Adopt membrane separation technique can simplify Sweet natural gas decarburization dewatering process, equipment is simple, processing ease, and floor space is little.Do not need additionally to add solvent, do not need regeneration, non-secondary pollution yet.The pressure of Sweet natural gas itself can be utilized as impellent, and turndown ratio is large.Can by the treatment capacity regulating membrane area and process parameter control to adapt to.
Accompanying drawing explanation
Fig. 1 is apparatus of the present invention schema.
In figure, the meaning of each numbering is as follows:
1-wet natural gas; 2-CO
2and H
2s; 3-waste water; 4-waste water; 5-dry gas;
1-1-strainer; 1-2-feed heater; 1-3-decarburization membrane separation apparatus; 1-4-dehydrated film separator; 1-5-water cooler; 1-6-gas-liquid separator; 1-7a, 1-7b-molecular sieve water separation tower; 1-8-well heater; 1-9-water cooler; 1-10-gas-liquid separator.
Embodiment
In conjunction with Figure of description, the technical process of this device is.
The wet natural gas 1(pressure come from natural gas pipeline is about 4.5MPa) by self pressure through filter 1-1 filters solid particles, send into well heater 1-2, be heated to 3-35 DEG C, send into decarburization membrane separation apparatus 1-3.The film that decarburization membrane separation apparatus 1-3 adopts is cellulose acetate membrane or polyimide film or polysulfone membrane, and this type of film is to CO
2and H
2the removal effect of S is fine.CO
2and H
2s discharges from the per-meate side of film, and on high-tension side Sweet natural gas removes CO
2and H
2be admitted to dehydrated film separator 1-4 after S, water is discharged by the per-meate side of film.The steam that dehydrated film separator is discharged may carry a small amount of CH secretly
4.The moisture that dehydrated film separator is discharged cools through water cooler 1-5 again, enters gas-liquid separator 1-6, isolates waste water and CH
4, CH
4gas is entered by molecular sieve water separation tower 1-7a top with the on high-tension side Sweet natural gas of dehydrated film separator 1-4, through molecular sieve filling layer, discharge by bottom molecular sieve water separation tower 1-7a, dry gas after dehydration is divided into two strands, one is as the resurgent gases of molecular sieve water separation tower, and another stock enters next step operation.After the dry gas heater via 1-8 heating of resurgent gases, molecular sieve water separation tower 1-7b is entered by bottom molecular sieve water separation tower 1-7b, molecular sieve is regenerated, dry gas after regenerated molecular sieve separates waste water and Sweet natural gas through water cooler 1-9, gas-liquid separator 1-10 successively, and natural gas via pipeline is connected with dehydrated film separator 1-4 export gas pipeline.
Claims (5)
1. a Sweet natural gas decarburization dewatering unit, it is characterized in that the wet natural gas (pressure is about 4.5MPa) come from natural gas pipeline is filtered solid particulate by the pressure of self, send into feed heater, be heated to 3-35 DEG C, send into decarburization membrane separation apparatus, remove CO
2and H
2s, then send into dehydrated film separator, water is discharged by the per-meate side of film, enters water cooler cooling, then enters gas-liquid separator separates and go out waste water and CH
4, after the natural gas via dehydration of dehydrated film separator high pressure side, enter molecular sieve water separation tower by molecular sieve dehydration top of tower, carry out deep dehydration, discharged by molecular sieve dehydration tower bottom after dehydration.
2. the dry gas after dehydration is divided into two strands, and one enters subsequent processing, and one resurgent gases as molecular sieve regenerates molecular sieve.
3. a kind of Sweet natural gas decarburization dewatering unit as claimed in claim 1, is characterized in that decarburization film is cellulose acetate membrane or polyimide film or polysulfone membrane.
4. a kind of Sweet natural gas decarburization dewatering unit as claimed in claim 1, is characterized in that dehydrated film is cellulose acetate film.
5. a kind of Sweet natural gas decarburization dewatering unit as claimed in claim 1, is characterized in that molecular sieve water separation tower is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510264155.0A CN104927951A (en) | 2015-05-22 | 2015-05-22 | Decarbonization and dehydration process for natural gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510264155.0A CN104927951A (en) | 2015-05-22 | 2015-05-22 | Decarbonization and dehydration process for natural gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104927951A true CN104927951A (en) | 2015-09-23 |
Family
ID=54115381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510264155.0A Pending CN104927951A (en) | 2015-05-22 | 2015-05-22 | Decarbonization and dehydration process for natural gas |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108424799A (en) * | 2018-05-29 | 2018-08-21 | 成都赛普瑞兴科技有限公司 | A kind of device and method purifying production liquefied natural gas using UF membrane |
| CN109722317A (en) * | 2019-03-01 | 2019-05-07 | 西安鸿钧睿泽新材料科技有限公司 | Based on wet reclamation CO2The natural gas decarbonization system and method for adsorbent material |
| CN110997108A (en) * | 2017-08-21 | 2020-04-10 | 埃克森美孚上游研究公司 | Integration of cold solvent and acid gas removal |
| CN111732981A (en) * | 2020-06-10 | 2020-10-02 | 中国石油天然气集团有限公司 | Flash evaporation gas decarburization dehydration method and device based on membrane separation |
| CN116764398A (en) * | 2023-08-18 | 2023-09-19 | 中国华能集团清洁能源技术研究院有限公司 | Carbon dioxide dehydration drying system and process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000016879A1 (en) * | 1998-09-22 | 2000-03-30 | Messer Griesheim Industries, Inc. | Process for separating natural gas and carbon dioxide |
| CN202322831U (en) * | 2011-11-24 | 2012-07-11 | 新奥科技发展有限公司 | Methane and landfill gas utilization system |
| CN203333608U (en) * | 2013-05-08 | 2013-12-11 | 山西汾西机电有限公司 | Marsh gas purification system |
| CN103525492A (en) * | 2013-10-23 | 2014-01-22 | 宁夏宝塔石化科技实业发展有限公司 | Natural gas processing and utilizing process |
| CN203530267U (en) * | 2013-10-22 | 2014-04-09 | 中聚天冠生物能源有限公司 | Compressed biogas production device with methane as raw material |
-
2015
- 2015-05-22 CN CN201510264155.0A patent/CN104927951A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000016879A1 (en) * | 1998-09-22 | 2000-03-30 | Messer Griesheim Industries, Inc. | Process for separating natural gas and carbon dioxide |
| CN202322831U (en) * | 2011-11-24 | 2012-07-11 | 新奥科技发展有限公司 | Methane and landfill gas utilization system |
| CN203333608U (en) * | 2013-05-08 | 2013-12-11 | 山西汾西机电有限公司 | Marsh gas purification system |
| CN203530267U (en) * | 2013-10-22 | 2014-04-09 | 中聚天冠生物能源有限公司 | Compressed biogas production device with methane as raw material |
| CN103525492A (en) * | 2013-10-23 | 2014-01-22 | 宁夏宝塔石化科技实业发展有限公司 | Natural gas processing and utilizing process |
Non-Patent Citations (1)
| Title |
|---|
| 黄维菊等: "CNG加气站原料天然气膜分离法脱水可行性分析", 《化工进展》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110997108A (en) * | 2017-08-21 | 2020-04-10 | 埃克森美孚上游研究公司 | Integration of cold solvent and acid gas removal |
| CN108424799A (en) * | 2018-05-29 | 2018-08-21 | 成都赛普瑞兴科技有限公司 | A kind of device and method purifying production liquefied natural gas using UF membrane |
| CN109722317A (en) * | 2019-03-01 | 2019-05-07 | 西安鸿钧睿泽新材料科技有限公司 | Based on wet reclamation CO2The natural gas decarbonization system and method for adsorbent material |
| CN111732981A (en) * | 2020-06-10 | 2020-10-02 | 中国石油天然气集团有限公司 | Flash evaporation gas decarburization dehydration method and device based on membrane separation |
| CN111732981B (en) * | 2020-06-10 | 2021-06-08 | 中国石油天然气集团有限公司 | Flash evaporation gas decarburization dehydration method and device based on membrane separation |
| CN116764398A (en) * | 2023-08-18 | 2023-09-19 | 中国华能集团清洁能源技术研究院有限公司 | Carbon dioxide dehydration drying system and process |
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Application publication date: 20150923 |