| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and apparatus capable of efficiently reducing dissolved oxygen in a raw water at a low cost by effectively utilizing the partial pressure difference of an inert gas to lower the consumption of the inert gas. SOLUTION: The raw water is introduced into the upper part of a stripping tower 1 wherein multiple stages of gas-liquid contact sections 2 are disposed, and the inert gas is also introduced into the lower part of the stripping tower 1. The raw water flowing down and the inert gas rising up are repeatedly subjected to countercurrent contact to each other in the gas-liquid contact sections 2 in the stripping tower 1 to strip the dissolved oxygen from the raw water into the inert gas by a mass transfer, thus the dissolved oxygen in the raw water being efficiently reduced. Moreover, the maintenance cost can be reduced by its simple construction. COPYRIGHT: (C)2004,JPO
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