| 发明名称 |
METHOD FOR REMOVING SCALES IN STEAM GENERATION FACILITY |
| 摘要 |
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:;Reference weight average molecular weight=−8462×{(pH value)−11.3}+61538 (1). |
| 申请公布号 |
US2016075580(A1) |
申请公布日期 |
2016.03.17 |
| 申请号 |
US201414780794 |
申请日期 |
2014.03.27 |
| 申请人 |
KURITA WATER INDUSTRIES LTD. |
发明人 |
SAKAI Mizuyuki;SHIMURA Yukimasa |
| 分类号 |
C02F5/10;C11D11/00;C11D3/37 |
主分类号 |
C02F5/10 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for removing a scale in a steam generation facility, 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:
Reference weight average molecular weight=−8462×{(pH value)−11.3}+61538 (1). |
| 地址 |
Tokyo JP |
