Method for removing scales in steam generation facility

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United States of America Patent

PATENT NO 9834462
APP PUB NO 20160075580A1
SERIAL NO

14780794

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Importance

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Abstract

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Provided is a method for removing a scale in a steam generation facility, whereby it becomes possible to remove a scale deposited on the inside of a boiler vessel during the operation of a boiler without causing corrosion of the boiler. A method for removing a scale in a steam generation facility is disclosed, wherein in the steam generation facility, a pH of boiler water is adjusted to 11.3 or more, and a polyacrylic acid having a weight average molecular weight that is 0.50 to 2.00 times a reference weight average molecular weight as calculated from the following calculation formula (1), or a salt thereof, is added in accordance with the pH value of the boiler water during the operation of a boiler, thereby removing a scale deposited on the inside of a boiler vessel:

description='In-line Formulae' end='lead'Reference weight average molecular weight=−8462×{(pH value)−11.3}+61538  (1).description='In-line Formulae' end='tail'

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Patent Owner(s)

  • KURITA WATER INDUSTRIES LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Sakai, Mizuyuki Hino, JP 5 3
Shimura, Yukimasa Komae, JP 20 51

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