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Title:
DEGASSING METHOD UTILIZING MOLECULAR DIFFUSION
Document Type and Number:
Japanese Patent JPH04313308
Kind Code:
A
Abstract:

PURPOSE: To reduce the dissolved oxygen amt. of raw water to a specified value with a commercially available (low-capacity) water-sealed vacuum pump by imparting a temp. difference between the sealing water of the pump and raw water to control their vapor pressure difference to a specified value, making the temp. of the sealing water lower than that of the raw water and degassing the raw water.

CONSTITUTION: The vapor pressure difference between a working fluid (or sealing water) and raw water is adjusted to ≥ about 8 Torr in the region where the fluid flows into a water-sealed vacuum pump 2 by making the temp. of the fluid lower than that of the raw water. Consequently, a steam flow is generated, the separated gas is transported from a degassing module 1 toward the pump 2 by the molecular diffusion at this time, and the degassing of the raw water is promoted. Consequently, the dissolved oxygen concn. of the raw water is reduced to ≤10 ppb with a commercially available (low-capacity) water-sealed vacuum pump.


Inventors:
Senoo, Yasutoshi
Shiraishi, Hitoshi
Application Number:
JP1991000108946
Publication Date:
November 05, 1992
Filing Date:
April 11, 1991
Export Citation:
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Assignee:
MIURA KENKYUSHO:KK
International Classes:
B01D19/00; C02F1/20; C02F1/58; F04C19/00; F04C25/02; (IPC1-7): B01D19/00; C02F1/20; C02F1/58
Domestic Patent References:
JPH0458095A1992-02-25