Refrigeration – Cryogenic treatment of gas or gas mixture – Separation of gas mixture
Patent
1997-02-07
2000-07-04
Doerrler, William
Refrigeration
Cryogenic treatment of gas or gas mixture
Separation of gas mixture
62654, F25J 300
Patent
active
060821361
ABSTRACT:
There are included a fractionating tower for liquefying and separating the compressed air cooled by heat exchangers to an ultralow temperature, a liquid oxygen takeout path for guiding the liquid oxygen in the above-mentioned fractionating tower to the above-mentioned heat exchangers to gasify so as to become a gasified oxygen, and a product oxygen gas takeout path which extends from the front end of the above-mentioned liquid oxygen takeout path and increases the temperature of the above-mentioned gasified oxygen so as to obtain a product oxygen gas, the above-mentioned liquid oxygen takeout path being provided with an oxygen gas pressurizing pump, and the above-mentioned product oxygen gas takeout path on the side upstream the above-mentioned heat exchangers being provided with an expansion turbine. In the present invention, the liquid oxygen taken out from the fractionating tower is pressurized in a liquid state, then introduced into the expansion turbine to generate a cold, which cold is fed to the heat exchangers, so that the cold is used as a cold source for the entire equipment to reduce the cost of generating the cold.
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Daido Hoxan Inc.
Doerrler William
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