ENHANCED ARGON RECOVERY FROM INTERMEDIATE LINBOIL

摘要

The argon recovery that can be obtained from a cryogenic air distillation plant dual pressure for the production of high purity oxygen is increased beyond current levels without causing disadvantages such O2 a lower pressure, recovery of O2 or N2 smaller, less liquid recovery, or more necessary energy. This is achieved by using an intermediate reflux condenser (208) (component (208) of Figure 2) in the lateral argon arm (202b) and causing liquid N2 via the valve (209) to the condenser, this which aims to increase the reboiler effect on both the argon rectification column (202a) and the lower section of the side arm argon (202b) in proportion to the amount of LN2 evaporated in the condenser ( 208).