Title:
METHOD FOR REDUCING CORROSION FATIGUE OF EVAPORATING TUBE IN BOILER
Document Type and Number:
WIPO Patent Application WO/2021/181723
Kind Code:
A1
Abstract:
The purpose of the present invention is to effectively reduce the corrosion fatigue of an evaporating tube in a boiler which occurs in association with a corrosive environment or repeated application of stress due to the presence of scales. A method for reducing the corrosion fatigue of an evaporating tube in a boiler, in which each of the concentration of chloride ions and the concentration of sulfate ions in the boiler water is managed at 10 mg/L or less. It is preferred to manage each of the concentration of chloride ions and the concentration of sulfate ions in boiler water by subjecting boiler feed water to a desalination treatment with an ion exchange device, a reverse osmosis membrane device or an electrodeionization device or by increasing the collection rate of boiler condensed water.
Inventors:
SAKAI MIZUYUKI (JP)
UCHIDA KAZUYOSHI (JP)
UCHIDA KAZUYOSHI (JP)
Application Number:
PCT/JP2020/033205
Publication Date:
September 16, 2021
Filing Date:
September 02, 2020
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
F22B37/00; B01D61/00; B01D61/44; C02F1/42; C02F1/44; C02F1/469; C02F5/00; C02F5/10; C02F5/14; C23F14/02; F22B37/56
Foreign References:
| JP2002048776A | 2002-02-15 | |||
| JP2009039599A | 2009-02-26 | |||
| CN208918783U | 2019-05-31 | |||
| JP2017074550A | 2017-04-20 | |||
| JP2015068631A | 2015-04-13 | |||
| JP2020043295A | 2020-03-19 |
Attorney, Agent or Firm:
SHIGENO, Tsuyoshi et al. (JP)
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