CN1952083A - Method for producing liquefied natural gas from coke oven gas using pressure-variable adsorption and deep freezing method - Google Patents
Method for producing liquefied natural gas from coke oven gas using pressure-variable adsorption and deep freezing method Download PDFInfo
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- CN1952083A CN1952083A CN 200610102039 CN200610102039A CN1952083A CN 1952083 A CN1952083 A CN 1952083A CN 200610102039 CN200610102039 CN 200610102039 CN 200610102039 A CN200610102039 A CN 200610102039A CN 1952083 A CN1952083 A CN 1952083A
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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
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, adopt simple transformation absorption to separate combination process, prepare the method for natural gas liquids (LNG) with deep refrigeration.
Present method is to utilize coke(oven)gas to adopt the transformation fractionation by adsorption to go out a large amount of H
2, desorption gas separates 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 the contained component of coke(oven)gas 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, be compressed to pressure 1.0-4.5MPa, temperature is 25-45 ℃;
(2) coke(oven)gas after the compression adopts improvement ADA method or tannin extract method to carry out coke oven gas desulfurization under pressure 1.0-4.5MPa;
(3) coke(oven)gas after purifying is at 1.0-4.5MPa, under temperature 25-45 ℃, carries out transformation absorption hydrogen manufacturing, obtains H
2And stripping gas;
(4) stripping gas carries out second time compression, and being compressed to pressure is 1.0-4.5MPa, under temperature 25-45 ℃, carries out condensation first time, is cooled to-carry out gas-liquid separation first time behind the 70--85 ℃, obtains divided gas flow and the separating mixed liquids first time for the first time;
(5) divided gas flow is to carry out the condensation second time under the 1.0-4.5MPa condition at gaseous tension, be cooled to-160--175 ℃, the gas-liquid mixture that is cooled carries out the gas-liquid separation second time under pressure 1.0-4.5MPa, obtain separating gas mixture for the second time and as the liquid of natural gas liquids (LNG) product.
It is a kind of public technology that aforesaid improvement ADA method or tannin extract method are carried out coke oven gas desulfurization, and concrete method is seen " the modern coal chemical technology handbook of Chemical Industry Press's in March, 2004 first version-publication.
Coke(oven)gas after treatment passes through electrically trapped tar oil, desulfurization, deamination, takes off benzene and takes off the coke(oven)gas that obtains behind the naphthalene eventually from the coke(oven)gas that coke oven comes out as mentioned above.
Contain propane, CO the aforesaid first time in the separating mixed liquids
2Deng material, can fully utilize after further separating.
Aforesaid second time, separating gas mixture was rich in CO, N
2
This patent advantage:
1. the present invention utilizes coking to diffuse coke-oven gas, adopts transformation absorption to separate combined technical method with deep refrigeration, preparation natural gas liquids LNG clean fuel.To alleviate China's natural gas liquids situation in short supply.
2. the present invention adopts transformation absorption and the integrated separation method of deep refrigeration, and technological process is simple, easy to operate.
3. the present invention fully separates the coke(oven)gas effective ingredient, can conveniently be used to produce different products.
Description of drawings
Fig. 1 is a process flow sheet of the present invention
Embodiment
Embodiment 1
The coke-oven plant come coke(oven)gas through electrically trapped tar oil, desulfurization, deamination, take off benzene and take off eventually the coke(oven)gas that obtains behind the naphthalene and enter compression for the first time, be compressed to pressure 1.2MPa, during 28 ℃ of temperature, incoming stock gas purifies, and adopts the desulfurization of improvement ADA method.Unstripped gas after the purification at pressure 1.1MPa, under 28 ℃ of the temperature, enters transformation absorption hydrogen manufacturing.Obtain H
2Product and stripping gas.Stripping gas is through being compressed to pressure 1.2MPa for the second time, and temperature is 28 ℃, enters condensation for the first time, material is cooled to-70 ℃ by the first cold medium, enters thereafter for the first time and separates.Contain propane, CO in the parting liquid for the first time
2Deng material.Isolated gas is at pressure 1.1MPa, under the temperature-70 ℃, enters condensation for the second time.Material is cooled to-175 ℃ by the second cold medium.Gas-liquid mixture goes to separate for the second time.Isolated liquid is natural gas liquids (LNG) product, isolates and contains CO, N
2Gaseous mixture.
Embodiment 2
The coke-oven plant comes coke(oven)gas process electrically trapped tar oil, desulfurization, deamination, takes off benzene and takes off the coke(oven)gas that obtains behind the naphthalene eventually to enter compression for the first time, be compressed to pressure 3.2MPa, during 35 ℃ of temperature, incoming stock gas purifies, adopt desulfurizing tanning extract, the unstripped gas after the purification is at pressure 3.1MPa, under 35 ℃ of the temperature, enter transformation absorption hydrogen manufacturing.Make H
2Product and stripping gas.Stripping gas is through being compressed to pressure 3.2MPa for the second time, and temperature is 35 ℃, enters condensation for the first time, material is cooled to-77 ℃ by the first cold medium, enters thereafter for the first time and separates.Contain propane, CO in first parting liquid
2Deng material, isolated gas is at pressure 3.1MPa, under the temperature-77 ℃, enters condensation for the second time.Material is cooled to-168 ℃ by the second cold medium.Gas-liquid mixture goes to separate for the second time.Isolated liquid is natural gas liquids (LNG) product.Isolated liquid is natural gas liquids (LNG) product, isolates and contains CO, N
2Gaseous mixture
Embodiment 3:
The coke-oven plant comes coke(oven)gas process electrically trapped tar oil, desulfurization, deamination, takes off benzene and takes off the coke(oven)gas that obtains behind the naphthalene eventually to enter compression for the first time, be compressed to pressure 4.2MPa, during 45 ℃ of temperature, incoming stock gas purifies, adopt desulfurizing tanning extract, the unstripped gas after the purification is at pressure 4.1MPa, under 45 ℃ of the temperature, enter transformation absorption hydrogen manufacturing.Make H
2Product and stripping gas.Stripping gas is through being compressed to pressure 4.2MPa for the second time, and temperature is 45 ℃, enters condensation for the first time, material is cooled to-85 ℃ by the first cold medium, enters thereafter for the first time and separates.Contain propane, CO in the parting liquid for the first time
2Deng material, isolated gas is at pressure 4.1MPa, under the temperature-85 ℃, enters condensation for the second time.Material is cooled to-160 ℃ by the second cold medium.Gas-liquid mixture goes to separate for the second time.Isolated liquid is natural gas liquids (LNG) product, and isolated liquid is natural gas liquids (LNG) product, isolates and contains CO, N
2Gaseous mixture.
Claims (2)
1, a kind of method of producing natural gas liquids with transformation absorption and deep refrigeration from coke(oven)gas is characterized in that comprising the steps:
(1), after treatment coke(oven)gas is carried out the compression first time, be compressed to pressure 1.0-4.5MPa, temperature is 25-45 ℃;
(2), the coke(oven)gas after the compression under pressure 1.0-4.5MPa, adopt improvement ADA method or tannin extract method to carry out coke oven gas desulfurization;
(3), the coke(oven)gas after purifying is at 1.0-4.5MPa, under temperature 25-45 ℃, carries out transformation absorption hydrogen manufacturing, obtains H
2And stripping gas;
(4), stripping gas carries out second time compression, being compressed to pressure is 1.0-4.5MPa, under temperature 25-45 ℃, carries out condensation first time, is cooled to-carry out gas-liquid separation first time behind the 7--85 ℃, obtains divided gas flow and the separating mixed liquids first time for the first time;
(5), divided gas flow is to carry out the condensation second time under the 1.0-4.5MPa condition at gaseous tension, be cooled to-160--175 ℃, the gas-liquid mixture that is cooled carries out the gas-liquid separation second time under pressure 1.0-4.5MPa, obtain separating gas mixture for the second time and as the liquid of liquefied natural gas product.
2, a kind of method of producing natural gas liquids with transformation absorption and deep refrigeration from coke(oven)gas as claimed in claim 1 is characterized in that described coke(oven)gas after treatment passes through electrically trapped tar oil, desulfurization, deamination, takes off benzene and takes 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 |
|---|---|---|---|
| CNB200610102039XA CN100453626C (en) | 2006-10-19 | 2006-10-19 | Method for producing liquefied natural gas from coke oven gas using pressure-variable adsorption and deep freezing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610102039XA CN100453626C (en) | 2006-10-19 | 2006-10-19 | Method for producing liquefied natural gas from coke oven gas using pressure-variable adsorption and deep freezing method |
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| Publication Number | Publication Date |
|---|---|
| CN1952083A true CN1952083A (en) | 2007-04-25 |
| CN100453626C CN100453626C (en) | 2009-01-21 |
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ID=38058644
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|---|---|---|---|
| CNB200610102039XA Expired - Fee Related CN100453626C (en) | 2006-10-19 | 2006-10-19 | Method for producing liquefied natural gas from coke oven gas using pressure-variable adsorption and deep freezing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101747965A (en) * | 2009-12-31 | 2010-06-23 | 徐西征 | Method for preparing substitute natural gas by utilizing coke oven 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 |
| CN105258453A (en) * | 2015-11-13 | 2016-01-20 | 四川天采科技有限责任公司 | Method for recovering light hydrocarbon and hydrogen from tail gas of petrochemical plant |
| CN105567360A (en) * | 2016-01-27 | 2016-05-11 | 中科合成油工程股份有限公司 | Method and system for preparing liquefied natural gas from coal-to-oil purified synthesis gas |
| US11344840B2 (en) | 2018-05-29 | 2022-05-31 | Sichuan Techairs Co., Ltd. | Method of purifying and recycling normal-pressure waste hydrogen by full temperature range pressure swing adsorption (FTrPSA) in manufacturing process of semiconductor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5891003A (en) * | 1981-11-27 | 1983-05-30 | Kawasaki Steel Corp | Cog refining method intended for production of pure hydrogen by psa method |
| DE3308304A1 (en) * | 1983-03-09 | 1984-09-13 | Didier Engineering Gmbh, 4300 Essen | Process for the production of substitute natural gas |
-
2006
- 2006-10-19 CN CNB200610102039XA patent/CN100453626C/en not_active Expired - Fee Related
Cited By (7)
| 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 |
| CN101747965A (en) * | 2009-12-31 | 2010-06-23 | 徐西征 | Method for preparing substitute natural gas by utilizing coke oven gas |
| CN105258453A (en) * | 2015-11-13 | 2016-01-20 | 四川天采科技有限责任公司 | Method for recovering light hydrocarbon and hydrogen from tail gas of petrochemical plant |
| CN105258453B (en) * | 2015-11-13 | 2017-11-07 | 四川天采科技有限责任公司 | A kind of method that lighter hydrocarbons and hydrogen are reclaimed in the tail gas from petrochemical plant |
| CN105567360A (en) * | 2016-01-27 | 2016-05-11 | 中科合成油工程股份有限公司 | Method and system for preparing liquefied natural gas from coal-to-oil purified synthesis gas |
| CN105567360B (en) * | 2016-01-27 | 2018-06-05 | 中科合成油工程股份有限公司 | A kind of coal liquifaction decontaminating syngas produces the method and system of liquefied natural gas |
| US11344840B2 (en) | 2018-05-29 | 2022-05-31 | Sichuan Techairs Co., Ltd. | Method of purifying and recycling normal-pressure waste hydrogen by full temperature range pressure swing adsorption (FTrPSA) in manufacturing process of semiconductor |
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|---|---|
| CN100453626C (en) | 2009-01-21 |
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