Performance analysis for a new chemical cleaning agent for superheaters and reheaters

ZHANG Xiangjin; DENG Yuqiang; YIN Ping; LIU Feng; NI Ruitao

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Performance analysis for a new chemical cleaning agent for superheaters and reheaters

更新时间：2025-09-28

- Performance analysis for a new chemical cleaning agent for superheaters and reheaters
- Thermal Power Generation Vol. 43, Issue 1, Pages: 80-84(2014)
- 作者机构：
  
  西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621.8
- Published：2014
- 稿件说明：
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ZHANG Xiangjin, DENG Yuqiang, YIN Ping, et al. Performance analysis for a new chemical cleaning agent for superheaters and reheaters[J]. Thermal power generation, 2014, 43(1): 80-84.
DOI：

ZHANG Xiangjin, DENG Yuqiang, YIN Ping, et al. Performance analysis for a new chemical cleaning agent for superheaters and reheaters[J]. Thermal power generation, 2014, 43(1): 80-84. DOI：

摘要

针对目前大型机组锅炉过/再热器的化学清洗

研制出一种复合有机清洗剂COCCA。模拟实际清洗工况

对其性能进行了测试

结果表明:该清洗剂对过/再热器氧化皮具有优异的溶解和防剥离特性

从而可避免化学清洗过程中垂直U(W)型管的堵塞;同时对过/再热器金属用材具有良好的相容性

对铁素体钢的均匀腐蚀速率小于1.0g/m2/h

无点蚀;对奥氏体不锈钢无晶间腐蚀

不影响其力学性能;对加载极限应力的奥氏体不锈钢不会产生应力腐蚀裂纹

是一种性能优异的过/再热器化学清洗剂。

Abstract

Aiming at chemical cleaning for large scale unit boiler's superheaters and reheaters

a complex organic cleaning agent(COCCA)was developed.The agent's performance has been tested by simulating the actual chemical cleaning condition.The results show that

this new cleaning agent has excellent dissolution characteristics and anti-stripping properties for oxide skin on the superheaters and reheaters

thus can avoid blockage of the vertical U(W)tube during the cleaning.Moreover

the COCCA has good compatibility for metals used for the superheaters and reheaters:its uniform corrosion rate on the ferrite steel is lower than 1.0g/m2/h

with no pitting corrosion;the intergranular corrosion didn't occur on the austenitic stainless steel

so the COCCA didn't affect the austenitic steel's mechanical properties;no stress corrosion crack appeared on the austenitic steel with load limit stress.Therefore

the COCCA is an excellent chemical cleaning agents for superheaters/reheaters.

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