阳泉二电厂炉水pH值降低原因的试验分析

通过对阳泉二电厂1号，2号机水汽质量进行跟踪监测，查出了给水pH值不低而炉水pH值降低的原因是由于精处理再生设备存在严重缺陷，精处理混床在线电导率表未正常投运，混床运行中泄漏大量Cl^-,造成炉水Cl^-浓度升高，炉水pH值下降。从机理上对试验现象进行了分析，提出了严格控制运行中精处理混床出水电导率，消除精处理再生设备摧残，改变炉内水处理方式等建议。

Experimental Analysis of pH Decrease of Boiler Water at the Yangquan No.2 Power Plant

By continuous measurement of water steam quality of No.1 and No.2 generator unit at the Yangquan No 2 power plant,it finds that the pH decreasing in boiler water but without any decreasing in feed water is due to the abnormal performance of in-situ conductivity analyzer and the defect of regenerate condensate polishing device,which led to the leaking of Cl - and then the rising of Cl - in boiler water.As a result,the pH of boiler water decreased.Based on the abave analysis,the best control of running was proposed.