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US 6,041,620 AGranted
Cryogenic industrial gas liquefaction with hybrid refrigeration generation
AssigneePraxair Technology, Inc.
InventorsWalter Joseph Olszewski, Bayram Arman, Arun Acharya, Joseph Alfred Weber, Mohammad Abdul-Aziz Rashad
Life of this patent
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Abstract
A method for liquefying an industrial gas wherein a portion of the requisite refrigeration is generated by a multicomponent refrigerant circuit and a portion is generated by turboexpansion of either a portion of the industrial gas or a portion of the multicomponent refrigerant.
Claims18
A method for liquefying an industrial gas comprising:
- (A) compressing an industrial gas, cooling the compressed industrial gas to produce cooled industrial gas, turboexpanding a first portion of the compressed, cooled industrial gas to generate refrigeration, and at least partially condensing a second portion of the compressed, cooled industrial gas by indirect heat exchange with the turboexpanded first portion to produce liquefied industrial gas;
- (B) compressing a multicomponent refrigerant fluid comprising at least two components, cooling the compressed multicomponent refrigerant fluid, expanding the compressed, cooled multicomponent refrigerant fluid to produce refrigeration, and warming the refrigeration bearing expanded multicomponent refrigerant fluid by indirect heat exchange with said cooling compressed industrial gas;
- and
- (C) recovering liquefied industrial gas as product.
1 more element
A method for liquefying an industrial gas comprising:
- (A) compressing an industrial gas, turboexpanding a first portion of the compressed industrial gas to generate refrigeration, cooling a second portion of the compressed industrial gas by indirect heat exchange with the turboexpanded first portion, and further cooling the cooled second portion of the industrial gas to produce liquefied industrial gas;
- (B) compressing a multicomponent refrigerant fluid comprising at least two components, cooling the compressed multicomponent refrigerant fluid, expanding the compressed, cooled multicomponent refrigerant fluid to produce refrigeration, and warming the refrigeration bearing expanded multicomponent refrigerant fluid by indirect heat exchange with said further cooling second portion of the industrial gas;
- and
- (C) recovering liquefied industrial gas as product.
1 more element
A method for liquefying an industrial gas comprising:
- (A) compressing a multicomponent refrigerant fluid comprising at least two components, turboexpanding a first portion of the compressed multicomponent refrigerant fluid to generate refrigeration, and warming the turboexpanded first portion of the multicomponent refrigerant fluid by indirect heat exchange with industrial gas to produce cooled industrial gas;
- (B) further compressing a second portion of the compressed multicomponent refrigerant fluid, expanding the further compressed second portion of the multicomponent refrigerant fluid to generate refrigeration, and warming the expanded second portion of the multicomponent refrigerant fluid by indirect heat exchange with the cooled industrial gas to produce liquefied industrial gas, and
- (C) recovering liquefied industrial gas as product.
Dependencies are inferred from the claim text.