CN1952084A - Method for producing liquefied natural gas from coke oven gas - Google Patents
Method for producing liquefied natural gas from coke oven gas Download PDFInfo
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- CN1952084A CN1952084A CN 200610102040 CN200610102040A CN1952084A CN 1952084 A CN1952084 A CN 1952084A CN 200610102040 CN200610102040 CN 200610102040 CN 200610102040 A CN200610102040 A CN 200610102040A CN 1952084 A CN1952084 A CN 1952084A
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- coke
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Abstract
The invention relates to a physical way to produce liquefied natural gas by separating coke oven gas. By pressure swing adsorption and deep refrigeration integration, producers can separate the methane from the coke oven gas to get the liquefied natural gas. The invention has the advantage of simple technology, thorough separation and full utilization; besides, the invention can be used to produce various kinds of chemical products.
Description
Technical field
The invention belongs to a kind of method of producing natural gas liquids, relate in particular to a kind of method of from coke(oven)gas, producing natural gas liquids with transformation absorption and deep refrigeration method.
Technical background
Natural gas liquids is called for short LNG, and major ingredient is a methane, also has a spot of ethane, propane and nitrogen etc.Be widely used in: 1) city resident's combustion gas; 2) substitute automobile fuel; 3) be used to produce speed cold food as low-temperature receiver, and the pulverize at low temperature that is used for plastics, rubber; 4) as industrial gasses fuel etc.
LNG production mainly is to utilize Sweet natural gas, prepares by the low-temperature liquefaction device.In recent years, the domestic market is in great demand to LNG, the annual need from external a large amount of imports.And China's energy structure is " rich coal, few oil, a deficency ", and China produces 200,000,000 tons/year in coke at present, effluxes coke-oven gas and is about 40,000,000,000 Nm
3/ year, the coke-oven gas that diffuse the coke-oven plant consists of: H
258-66%; CH
421-25%; CO5-8%; CmHn1.6-2.0%; CO
21.9-2.3%; N
22-6%, and small amount of impurities make the LNG product with wherein contained methane liquefaction separation, can make 5,700,000 tons of/year LNG products, alleviate China LNG situation in short supply greatly.
Summary of the invention
The purpose of this invention is to provide a kind of coke-oven gas that utilizes adopts transformation absorption and deep refrigeration legal system to be equipped with the method for natural gas liquids (LNG).
Present method is to utilize coke(oven)gas to adopt the transformation fractionation by adsorption to go out a large amount of CO, and adsorbed gas does not separate through deep refrigeration, and makes liquefied natural gas product.This technological process is simple, and energy consumption is low, and is easy to operate, and coke(oven)gas effective constituent is made full use of, and realized economy, environment, the Trinitarian coordinated development of the energy.
Preparation method of the present invention comprises the steps:
(1) after treatment coke(oven)gas is carried out the compression first time, being compressed to pressure is 2.0-4.5MPa, and temperature is 25-45 ℃;
(2) coke(oven)gas after the compression carries out raw material gas purifying, under 2.0-4.5MPa pressure, adopts low-temp methanol washing process technology or polyglycol dimethyl ether process (NHD) method to purify H in the unstripped gas after the purification
2S content≤0.1ppm obtains separating mixed gas for the first time simultaneously;
(3) unstripped gas after purifying is at 2.0-4.5MPa, under temperature 30-45 ℃, carries out transformation absorption and makes CO and adsorbate not;
(4) adsorbate does not carry out condensation at pressure 2.0-4.5MPa under temperature 30-45 ℃, is cooled to-160--175 ℃ laggard promoting the circulation of qi liquid separates, and obtains separating gas mixture and as the liquid of natural gas liquids (LNG) product.
Coke(oven)gas after treatment is to pass through electrically trapped tar oil, desulfurization, deamination, take off benzene and take off the coke(oven)gas that obtains behind the naphthalene eventually from the coke(oven)gas that coke oven comes out as mentioned above.
Aforesaid first time, separating mixed gas contained CO
2, H
2S and carbonylsulfide (COS), carbonylsulfide (COS) and H
2S gas can further reclaim sulphur.
Aforesaid CO can go after compression that methyl alcohol is synthetic, dme synthetic and ammonia synthesis.
Aforesaid separating gas mixture is rich in H
2, N
2, after separating, can be used for preparing methyl alcohol, dme and synthetic ammonia etc.
This patent advantage
1, the present invention utilizes the coke(oven)gas that diffuse the coke-oven plant, adopts transformation absorption to separate combination process with deep refrigeration, makes natural gas liquids LNG clean fuel, to alleviate the natural gas liquids supply of China's growing tension.
2, the present invention adopts transformation absorption and the integrated separation method of deep refrigeration physics, and technological process is simple, easy to operate.
3, the present invention fully separates the coke(oven)gas effective ingredient, makes things convenient for the different process utilization.
Description of drawings
Fig. 1 is a process flow sheet of the present invention
Embodiment
Embodiment 1
The coke(oven)gas that comes out from coke oven through electrically trapped tar oil, desulfurization, deamination, take off benzene and taking off the coke(oven)gas that obtains behind the naphthalene is compressed to pressure 2.2MPa eventually, during 30 ℃ of temperature, incoming stock gas purifies, and purifies the low-temp methanol washing process technology that adopts, with coke(oven)gas while desulfurization and decarburization.H in the unstripped gas after the purification
2S content=0.1ppm, unstripped gas after the purification is at 2.1MPa, under 30 ℃ of the temperature, enter transformation absorption system CO, adsorbate is not at pressure 2.0MPa, under 30 ℃ of the temperature, enter condensation, material is cooled to-175 ℃, enter separation thereafter by cold medium, isolated liquid is natural gas liquids (LNG) product, isolates and contains CO, N
2Gaseous mixture.
Embodiment 2
The coke(oven)gas that comes out from coke oven through electrically trapped tar oil, desulfurization, deamination, take off benzene and taking off the coke(oven)gas that obtains behind the naphthalene is compressed to pressure 3.2MPa eventually, during 38 ℃ of temperature, incoming stock gas purifies, and purifies polyglycol dimethyl ether process (NHD) method that adopts, with coke(oven)gas while desulfurization and decarburization.H in the unstripped gas after the purification
2S content=0.09ppm, unstripped gas after the purification is at 3.1MPa, under 38 ℃ of the temperature, enter transformation absorption system CO, adsorbate is not at pressure 3.0MPa, under 38 ℃ of the temperature, enter condensation, material is cooled to-168 ℃, enter separation thereafter by cold medium, isolated liquid is natural gas liquids (LNG) product, isolates and contains CO, N
2Gaseous mixture.
Embodiment 3:
The coke(oven)gas that comes out from coke oven through electrically trapped tar oil, desulfurization, deamination, take off benzene and taking off the coke(oven)gas that obtains behind the naphthalene is compressed to pressure 4.2MPa eventually, during 45 ℃ of temperature, incoming stock gas purifies, and purifies polyglycol dimethyl ether process (NHD) method that adopts, with coke(oven)gas while desulfurization and decarburization.H in the unstripped gas after the purification
2S content=0.07ppm, unstripped gas after the purification is at 4.1MPa, under 45 ℃ of the temperature, enter transformation absorption system CO, adsorbate is not at pressure 4.0MPa, under 45 ℃ of the temperature, enter condensation, material is cooled to-160 ℃, enter separation thereafter by cold medium, isolated liquid is natural gas liquids (LNG) product, isolates and contains CO, N
2Gaseous mixture.
Claims (3)
1, a kind of method of producing natural gas liquids from coke(oven)gas is characterized in that comprising the steps:
(1), after treatment coke(oven)gas is carried out the compression first time, being compressed to pressure is 2.0-4.5MPa, and temperature is 25-45 ℃;
(2), the coke(oven)gas after the compression carries out raw material gas purifying, under 2.0-4.5MPa pressure, adopt low-temp methanol washing process technology or polyglycol dimethyl ether process method to purify, H2S content≤0.1ppm in the unstripped gas after the purification obtains separating mixed gas for the first time simultaneously;
(3), the unstripped gas after purifying is at 2.0-4.5MPa, under temperature 30-45 ℃, carry out transformation absorption and make CO and adsorbate not;
(4), not adsorbate is at pressure 2.0-4.5MPa, under temperature 30-45 ℃, carries out condensation, is cooled to-160--175 ℃ laggard promoting the circulation of qi liquid separates, and obtains separating gas mixture and as the liquid of liquefied natural gas product.
2, a kind of method of producing natural gas liquids from coke(oven)gas as claimed in claim 1 is characterized in that described carbonylsulfide and H
2S gas reclaims sulphur.
3, a kind of method of producing natural gas liquids from coke(oven)gas as claimed in claim 1 is characterized in that described coke(oven)gas after treatment is to pass through electrically trapped tar oil, desulfurization, deamination, take off benzene and take off the coke(oven)gas that obtains behind the naphthalene eventually from the coke(oven)gas that coke oven comes out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101020402A CN100543118C (en) | 2006-10-19 | 2006-10-19 | A kind of method of from coke(oven)gas, producing natural gas liquids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101020402A CN100543118C (en) | 2006-10-19 | 2006-10-19 | A kind of method of from coke(oven)gas, producing natural gas liquids |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1952084A true CN1952084A (en) | 2007-04-25 |
| CN100543118C CN100543118C (en) | 2009-09-23 |
Family
ID=38058645
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101020402A Expired - Fee Related CN100543118C (en) | 2006-10-19 | 2006-10-19 | A kind of method of from coke(oven)gas, producing natural gas liquids |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101575540A (en) * | 2009-06-01 | 2009-11-11 | 中国科学院理化技术研究所 | Method for producing liquefied natural gas and carbinol simultaneously |
| CN101799244A (en) * | 2010-04-19 | 2010-08-11 | 杨绍泉 | Comprehensive utilization method of industrial furnace gas |
| CN102172436A (en) * | 2011-03-08 | 2011-09-07 | 安徽淮化股份有限公司 | NHD (polyethylene glycol dimethyl ether) desulfurization and decarburization condensate recovery method and system |
| CN102250658A (en) * | 2010-05-19 | 2011-11-23 | 上海标氢气体技术有限公司 | Method for preparing liquefied natural gas by converting raw materials of coke oven gas and blast furnace gas |
| CN101463281B (en) * | 2007-12-17 | 2012-03-28 | 中国科学院理化技术研究所 | Separating technique and apparatus for preparing liquefied natural gas from coke oven gas |
-
2006
- 2006-10-19 CN CNB2006101020402A patent/CN100543118C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463281B (en) * | 2007-12-17 | 2012-03-28 | 中国科学院理化技术研究所 | Separating technique and apparatus for preparing liquefied natural gas from coke oven gas |
| CN101575540A (en) * | 2009-06-01 | 2009-11-11 | 中国科学院理化技术研究所 | Method for producing liquefied natural gas and carbinol simultaneously |
| CN101799244A (en) * | 2010-04-19 | 2010-08-11 | 杨绍泉 | Comprehensive utilization method of industrial furnace gas |
| CN102250658A (en) * | 2010-05-19 | 2011-11-23 | 上海标氢气体技术有限公司 | Method for preparing liquefied natural gas by converting raw materials of coke oven gas and blast furnace gas |
| CN102172436A (en) * | 2011-03-08 | 2011-09-07 | 安徽淮化股份有限公司 | NHD (polyethylene glycol dimethyl ether) desulfurization and decarburization condensate recovery method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100543118C (en) | 2009-09-23 |
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Granted publication date: 20090923 Termination date: 20121019 |