JPS56141805A - Degassing method - Google Patents

Abstract

PURPOSE: To effectively degas incoming water, by introducing the water into a heat transfer tube bundle to separate noncondensable gas, then compressing the gas to raise it to high temperature, and introducing it to said tube bundle to exchange heat between the gas and the water.

CONSTITUTION: The sea water to be treated is introduced from pipe 15 to condensation tube bundle 16 of heat release part 13, the vapor evaporated from evaporation chamber 17 is condensed, then the greater part of the water is released out of pipe 18, and the other part of it is introduced into degassing apparatus 1 through branch pipe 19, falls on heat transfer tube bundle 3 from water distributor 20 like rain in apparatus 1, and exchanges heat on the surfaces of tubes 3 with the high temperature vapor introduced through compressor delivery pipe 7 to tubes 3, resulting in thin film evaporation and release of oxygen, carbon dioxide gas, etc. The vapor produced together with these gasses are drawn and compressed with compressor 6, introduced into tubes 3, exchange heat with the sea water scattered on the outsides of tubes 3, the greater part of it is condensed, the other part of the vapor goes to header 9 together with the noncondensable gases, passes through final evaporation chamber 17, and is released out of there with exhausting device 12.

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