IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0581256
(2009-10-19)
|
등록번호 |
US-8226744
(2012-07-24)
|
우선권정보 |
FR-08 57133 (2008-10-21) |
발명자
/ 주소 |
- Monereau, Christian
- Haik-Beraud, Natacha
- Gueret, Vincent
- Berthelemot, Anne
|
출원인 / 주소 |
- L'Air Liquide Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
15 |
초록
▼
A method for purifying or separating a gas mixture comprising at least one fuel, using a unit having at least one adsorber subjected to a pressure cycle comprising at least one step of placing under vacuum by means of a vacuum pump, wherein at least one adsorber and/or the vacuum pump, depressurized
A method for purifying or separating a gas mixture comprising at least one fuel, using a unit having at least one adsorber subjected to a pressure cycle comprising at least one step of placing under vacuum by means of a vacuum pump, wherein at least one adsorber and/or the vacuum pump, depressurized during the cycle, is repressurized at least partly by an external gas to said unit and not containing a sufficient quantity of oxidizer to create an inflammable mixture during this repressurization.
대표청구항
▼
1. A method for purifying or separating a gas mixture comprising at least one fuel, using a unit having at least one adsorber subjected to a pressure cycle comprising at least one step of placing under vacuum by means of a vacuum pump, wherein at least the vacuum pump, depressurized during the cycle
1. A method for purifying or separating a gas mixture comprising at least one fuel, using a unit having at least one adsorber subjected to a pressure cycle comprising at least one step of placing under vacuum by means of a vacuum pump, wherein at least the vacuum pump, depressurized during the cycle, is repressurized at least partly by an external gas to said unit and not containing a sufficient quantity of oxidizer to create an inflammable mixture during this repressurization. 2. The method of claim 1, wherein the vacuum pump, depressurized during the cycle, is repressurized to a pressure equal to or higher than atmospheric pressure. 3. The method of claim 1, wherein said repressurization, at least partly by an external gas to said unit and not containing a sufficient quantity of oxidizer to create an inflammable mixture, is carried out during shutdown of the unit. 4. The method of claim 1, wherein said repressurization, at least partly by an external gas to said unit and not containing a sufficient quantity of oxidizer to create an inflammable mixture, is carried out, during the operation of the unit, at each pressure cycle of at least one adsorber. 5. The method of claim 1, wherein the repressurization, of the depressurized vacuum pump, by said external gas, takes place in less than 30 seconds. 6. The method of claim 5, wherein the repressurization, of the depressurized vacuum pump, by said external gas takes place in less than 10 seconds. 7. The method of claim 5, wherein the repressurization, of the depressurized vacuum pump, by said external gas takes place in less than 5 seconds. 8. The method of claim 1, wherein at least one adsorber, depressurized during the cycle, is repressurized at least partly by said external gas. 9. The method of claim 1, wherein the fuel is selected from the group consisting of hydrogen H2, carbon monoxide CO, methane CH4 and hydrocarbons. 10. The method of claim 1, wherein the external gas is selected from the group consisting of the stored gas mixture, a gas issuing from a blow-down step, of said pressure cycle, and stored, the stripped and stored gas, and nitrogen issuing from a pressurized tank and a unit for separating the gases of the air or a mixture of these gases. 11. The method of claim 1, wherein the gas mixture comprises carbon dioxide, carbon monoxide, nitrogen and hydrogen, and wherein the external gas is gas enriched with CO2 issuing from a blow-down step of said pressure cycle. 12. The method of claim 1, wherein said unit is a VSA CO2 unit. 13. The method of claim 12, wherein at least one adsorber of the VSA is repressurized, after a shutdown of the unit, at least to atmospheric pressure, using a first volume of said gas, external to said unit and not containing a sufficient quantity of oxidizer, to create an inflammable mixture during this repressurization; said volume being stored in a gas holder placed at the vacuum pump discharge. 14. The method of claim 13, wherein the vacuum pump is repressurized, after a shutdown of the unit and/or at the end of each step of placing under vacuum, to atmospheric pressure using a second volume of said gas, external to said unit and not containing a sufficient quantity of oxidizer to create an inflammable mixture during this repressurization, said volume being stored in a gas holder placed at the vacuum pump discharge. 15. The method of claim 13, wherein during the operation of the unit, the gas holder contains a security volume equal to the first volume of gas. 16. The method as claimed in claim 15, wherein the repressurization of the vacuum pump and at least one adsorber from the security volume is triggered manually or automatically at each risk of air entry. 17. The method of claim 13, wherein the vacuum pump is repressurized in less than 5 seconds. 18. The method of claim 17, wherein the vacuum pump is repressurized in less than one second. 19. The method of claim 12, wherein the CO2 issuing from the VSA is packed in cylinders or fed to a CO2 line for industrial use or underground storage directly or after supplementary treatment. 20. The method of claim 19, wherein the CO2 issuing from the VSA is packed in cylinders or fed to a CO2 line for industrial use or underground storage directly or after supplementary treatment, after a cryogenic treatment.
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