Apparatus for manufacturing ultra-pure water

Details Apparatus for manufacturing ultra-pure water Apparatus for manufacturing ultra-pure water

1991-08-30

1993-10-05

Dawson, Robert A.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

2101952, 2102572, 210180, 210181, 210900, 210750, B01D 6100

Patent

active

052501833

ABSTRACT:
The present invention provides an apparatus for manufacturing ultra-pure water, characterized in that a decarbonator/degassor and a reverse osmosis equipment for pretreatment of supply water are installed in the upper stream of a multiple effect evaporator. The present invention also provides a method for manufacturing ultra-pure water, characterized in that most of the carbonic groups dissolved in the supply water is degassed by a decarbonating/degassing treatment prior to introducing the water to the multiple effect evaporator, and that most of the scale components such as Ca.sup.++, SO.sub.4.sup.-- and Mg.sup.++ are also eliminated by a reverse osmosis treatment.

REFERENCES:
patent: 3901768 (1975-08-01), Steinbruchel
patent: 3968002 (1976-07-01), Standiford
patent: 4344826 (1982-08-01), Smith
patent: 4795532 (1989-01-01), Mizutani et al.
Patent Abstracts of Japan, vol. 14, No. 242 (C-721) 23 May 1990 & JP-A-2 063 592 (Hitachi Ltd.).
Patent Abstracts of Japan, vol. 10, No. 269 (C-372) 12 Sep. 1986 & JP-A-61 093 897 (Hitachi Zosen Corp.).
Patent Abstracts of Japan, vol. 10, No. 339 (C-385) 15 Nov. 1986 & JP-A-61 141 985 (Mitsubishi Heavy Ind. Ltd.).

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