Title:
METHOD FOR PRODUCING PURE WATER FOR BOILER FEED WATER
Document Type and Number:
Japanese Patent JP2017159212
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing pure water for boiler feed water, the method allowing for stabilization of pH of boiler water after the boiler water has been fed to a boiler.SOLUTION: Water to be treated W is supplied from above a cation exchange resin column 2 through a first flow channel 11, and cation in the water to be treated W is exchanged with and adsorbed to the resin in the cation exchange resin column 2 to obtain cation-treated water W1. The obtain cation-treated water W1 is supplied from a second flow channel 12 to above a decarbonation tower 3, and water is sprayed from a tower upper part to remove carbonic acid in the cation-treated W1. Then, decarbonated water W2 is supplied from a third flow channel 13 to above an anion exchange resin tower 4, anion in the decarbonated water W2 is exchanged with and adsorbed to resin in the anion exchange resin tower 4 to obtain pure water W3 for boiler feed water. At this time, as the anion exchange resin, a resin is used which has been conditioned (cleaned) beforehand in such a manner that a TOC elution amount is 50 ppb or less, preferably, 30 ppb or less.SELECTED DRAWING: Figure 1
Inventors:
SATO SHIN
MINATO YASUHARU
MINATO YASUHARU
Application Number:
JP2016044570A
Publication Date:
September 14, 2017
Filing Date:
March 08, 2016
Export Citation:
Assignee:
KURITA WATER IND LTD
International Classes:
C02F1/42; B01J39/18; B01J41/12; B01J47/028; B01J49/60; C02F1/20
Domestic Patent References:
| JP2014104413A | 2014-06-09 | |||
| JPH11221561A | 1999-08-17 | |||
| JP2007083132A | 2007-04-05 | |||
| JP2000202440A | 2000-07-25 |
Attorney, Agent or Firm:
Yuji Hayakawa
Keisuke Murasame
Keisuke Murasame
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