Refrigeration – Cryogenic treatment of gas or gas mixture – Separation of gas mixture
Patent
1997-02-14
1999-05-11
Kilner, Christopher
Refrigeration
Cryogenic treatment of gas or gas mixture
Separation of gas mixture
62903, F25J3/00
Patent
active
059015748
ABSTRACT:
The device and the process are used to evaporate a liquid. A first (7) and a second (9) heat exchanger contain evaporation passages and passages for a heat transfer fluid. First heat exchanger (7) is designed as a falling film evaporator, second heat exchanger (9) is designed as a liquid bath evaporator. First heat exchanger (7) has means (13, 14) to introduce heat transfer fluid and means to drain heat transfer fluid. Second heat exchanger (9) includes means to introduce heat transfer fluid. The flow of the means for draining heat transfer fluid from first heat exchanger (7) is connected to the flow of the means for introducing heat transfer fluid into second heat exchanger (9). The equipment and the device can be used in a process for low-temperature separation of air that has a double column consisting of a pressure column (2) and a low-pressure column (3), and the equipment is used for evaporating liquid (5, 6) from the lower section of low-pressure column (3) in indirect heat exchange (7, 9) against condensing vapor (13, 14) from the upper area of pressure column (2).
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Kilner Christopher
Linde Aktiengesellschaft
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