Enrichment of krypton and xenon in oxygen fraction of air liquefaction plant, employs plate heat exchanger block made from copper, nickel or their alloys

摘要

The body of the plate heat exchanger block is made from copper, nickel, a copper alloy or a nickel alloy. The sump evaporator of the krypton-xenon enrichment column is constructed as a bath evaporator. It is constructed as a condenser-evaporator. Through indirect heat exchange, hot vapor is at least partially condensed in the sump evaporator. Equipment is provided to introduce recovered gas into the krypton-xenon enrichment column, and to introduce hot vapor into the condensation space of the sump evaporator : An independent claim IS INCLUDED FOR corresponding plant equipment.