| 摘要 |
PROBLEM TO BE SOLVED: To obtain a heat exchanger having an enhanced heat recovery rate in which noncondensed gas stored during heat exchange can also be discharged to the outside. SOLUTION: A drain recovery unit 5 is coupled with the bottom section of a heat exchanging vessel 1 and an ejector 22 is coupled with the top section of the heat exchanging vessel 1. The ejector 22 is coupled, on the inlet side thereof, with a cooling fluid supply pipe 4 and, on the outlet side thereof, with a coiled cooling fluid supply pipe 11 along with the drain return opening 30 side of the drain recovery unit 5. Drain pressure fed from the drain recovery unit 5 is mixed with cooling fluid fed from the ejector 22 before being fed to the coiled cooling fluid supply pipe 11 for further heat exchange. Noncondensed gas stored in the heat exchanging vessel 1 during heat exchange is sucked by the ejector 22 and discharged to the outside.
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