锅炉给水加氧转换期间铬酸根离子释放研究  

STUDY ON CrO2-4-RELEASING IN CONVERTING PROCESS OF ADDING OXYGEN INTO FEED-WATER FOR BOILERS

作　　者：李志刚[1] 沈保中 黄万启[1] 

机构地区：[1]西安热工研究院有限公司,陕西西安710032 [2]华能石洞口第二发电厂,上海200942

出　　处：《热力发电》2012年第2期47-52,共6页Thermal Power Generation

摘　　要：通过监测不同类型机组锅炉给水加氧转换过程及运行期间氢电导率、溶解氧、CrO42-等指标的变化,对加氧转换过程中CrO42-的释放来源进行分析讨论。研究表明,给水加氧转换期间热力系统某些取样点检测出的CrO42-来源于不锈钢取样管,与热力系统设备无关。采用给水加氧处理的机组在正常运行时,未检测出铬离子含量的异常变化。Through Monitoring the converting process of adding oxygen into feed-water of boilers for different capacity parameters of units and the variation of indices in operation period,such as the hydrogen conductivity,the disolved oxygen,an the CrO2-4 etc.,the source of CrO2-4-releasing in converting process of adding oxygen has been analysed and discussed.Study shows that the source of CrO2-4 detected from some sampling points of the thermodynamic system in the converting process of adding oxygen into feed-water are sampling tubes made from stainless steel,and having no relationship with the equipents in said system.During normal operation of units adopting the adding oxygen treatment,abnormal variation of CrO2-4 content hadn＇t detected from each sampling point.

关 键 词：锅炉 给水加氧处理 氢电导率 阴离子 铬酸根离子 取样管 不锈钢 

分 类 号：TM621.8[电气工程—电力系统及自动化]