摘要
使用溶解氢表测量主蒸汽中氢气质量浓度是监测过热器和再热器管壁高温氧化速度的有效方法,可以预警可能出现的超温或过热结垢现象。但在实际运行过程中发现,溶解氢表测量准确性较差。通过试验研究发现,水样中的溶解氧对溶解氢表测量存在明显影响。溶解氢质量浓度越小,溶解氧质量浓度越大,溶解氢表测量相对误差越大。另一方面,当溶解氢质量浓度一定时,溶解氢表实际测量值与溶解氧质量浓度存在线性关系。因此得出溶解氧可能是影响溶解氢表测量的重要因素。
It is an effective method to monitor the high temperature oxidation rate of the inner wall of superheater and reheater tubes by using dissolved hydrogen analyzer to measure dissolved hydrogen content in main steam ,which can warn the possible overheating or overheating deposit.However,it is found that in the actual operation,measurement accuracy of dissolved hydrogen analyzer is poor. The results of study show that the dissolved oxygen in water sample has obvious effect on the measurement of dissolved hydrogen. The smaller the dissolved hydrogen is,the more dissolved oxygen contains,and the greater the relative error of dissolved hydrogen analyzer makes. On the other hand,when the dissolved hydrogen content is constant,the actual value of the dissolved hydrogen analyzer has a linear relationship with the dissolved oxygen content.Therefore,dissolved oxygen may be an important factor affecting the measurement of dissolved hydrogen analyzer.
作者
李海洋
王仁雷
尤良洲
衡世权
LI Haiyang;WANG Renlei;YOU Liangzhou;HENG Shiquan(Huadian Electric Power Research Institute Company limited,Hangzhou 310030,China)
出处
《华电技术》
CAS
2019年第7期27-30,共4页
HUADIAN TECHNOLOGY
关键词
主蒸汽
溶解氢表
溶解氧
测量相对误差
线性关系
main steam
the dissolved hydrogen analyzer
dissolved hydrogen
relative error of measurement
linear relationship
作者简介
李海洋(1988-),男,河南信阳人,工程师,工学硕士,从事电厂化学腐蚀与防护以及电厂化学仪表研究方面的工作(E-mail:haiyang-Li@chder.com).
