MULTISTAGE RESERVOIR-TYPE CONDENSER-EVAPORATOR, AND NITROGEN PRODUCTION DEVICE USING MULTISTAGE RESERVOIR-TYPE CONDENSER-EVAPORATOR

摘要

The purpose of the present invention is to provide a compact multistage reservoir-type condenser-evaporator and a nitrogen production device using the multistage reservoir-type condenser-evaporator making it possible to produce gases of two different types of compositions without increasing the power for producing the nitrogen. The present invention provides a multistage reservoir-type condenser-evaporator characterized by being further equipped with: a lowermost stage reservoir section for collecting, without circulating, a liquid supplied to a lower-stage evaporation passage; and a fluid collection unit for collecting fluid flowing out from a lowermost-stage evaporation passage, and discharging same to the exterior without returning same to the lowermost stage reservoir section.