F - Mech Eng,Light,Heat,Weapons – 25 – J
Patent
F - Mech Eng,Light,Heat,Weapons
25
J
F25J 3/04 (2006.01) F25J 3/00 (2006.01)
Patent
CA 2324052
The process and the apparatus are used for the low-temperature fractionation of air. Charge air (1) which has been compressed and has undergone prior purification is introduced into a rectifier system for nitrogen/oxygen separation. This system comprises a pressure column (2), a low-pressure column (3) and a condenser/evaporator system (101, 102, 103) for heating the low-pressure column (3). The condenser/evaporator system has a first section (101) which is designed as a falling-film evaporator. A first oxygen-rich liquid (6) from the low-pressure column (3) is introduced into the evaporation passages of the falling-film evaporator (101), where it is partially evaporated. In the process, an oxygen-rich vapour (11) and a second oxygen-rich liquid (12) are formed. At least part of the oxygen-rich vapour (11) is returned to the low-pressure column (3). The condenser/evaporator system additionally has a second section (102, 103), which is designed at least in part as a forced circulation evaporator (103). At least some of the second oxygen-rich liquid (12, 13) is passed, by means of a delivery device (14), to the evaporation passages of the second section (102, 103) of the condenser/evaporator system.
Johnson Ernest Peter
Linde Aktiengesellschaft
Pompl Gerhard
LandOfFree
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