DING Xuchun, WANG Yi, YIN Zhilong, et al. Flow passage fouling in a 630MW supercritical unit steam turbine:diagnosis and treatment[J]. Thermal power generation, 2013, 42(11): 138-141.
DING Xuchun, WANG Yi, YIN Zhilong, et al. Flow passage fouling in a 630MW supercritical unit steam turbine:diagnosis and treatment[J]. Thermal power generation, 2013, 42(11): 138-141.DOI:
超临界630 MW机组汽轮机通流结垢诊断及处理
摘要
针对某超临界630MW机组首次大修后出现的出力不足、调节级压力逐渐升高等现象
通过监测其热力参数和性能的变化趋势
诊断出高压缸通流部分结垢。在分析结垢原因的基础上
通过对该机组实施锅炉酸洗、汽轮机叶栅喷珠及凝结水加氧处理以抑制给水系统流动加速腐蚀等措施后
解决了该机组汽轮机通流结垢的问题
使调节级压力恢复正常
机组出力得到提高。
Abstract
The insufficient output and the abnormal gradual pressure rise at the first stage occurred after the first overhaul in a 630MW supercritical unit.On the basis of monitoring variation trend of the thermodynamic parameters and its performance
the fouling fault in flow passage of the HP steam turbine was diagnosed.Against this problem
several countermeasures were taken during the second overhaul
such as boiler acid cleaning
sand blasting to turbine blades and condensate oxygenated treatment to inhibit the flow accelerated corrosion(FAC).After the improvement
the fouling problem in flow passage of the steam turbine was solved
the first stage pressure returned to normal and the unit output was increased.