电厂水汽中痕量TOC测量方法研究  

Test method for trace total organic carbon content in water vapor

作　　者：田利[1] 石立斌[2] 安雪松[2] 范识玄 王广珠[1] 

机构地区：[1]西安热工研究院有限公司,陕西西安710032 [2]神华江苏国华陈家港发电有限公司,江苏盐城224631 [3]北京大学化学与分子工程学院,北京100871

出　　处：《热力发电》2013年第9期92-94,135,共4页Thermal Power Generation

基　　金：华能集团重点科技项目(ZA-12-HJK16)

摘　　要：针对电厂锅炉给水中总有机碳(TOC)测量的特点,提出采用紫外氧化-电导检测痕量TOC的新方法,确定影响测量的关键因素,并测试其准确度及精密度.运用该方法对TOC含量为0～500 μg/L的水样进行了测定,结果表明其加标回收率在95％～103％,测量标准偏差在2％～5％,具有良好的准确度及精密度.该方法操作简便,易于实现现场在线监测.According to the measurement characteristics of total organic carbon(TOC)content in feedwater,a new method using ultraviolet oxidation combined with conductance to detect the trace TOC content was put forward.Key factors affecting the measurement were determined,and the accuracy and precision of this method were tested.This method was applied to detect the water sample with TOC content from 0μg/L to 500μg/L.The results showed that,the recovery rate of this method was between 95% and 103%,and the measurement standard deviation was between2% and 5%,indicating this method had a high accuracy and precision.Therefore,this method was easy to realize and can realize online detection in field.

关 键 词：给水 痕量TOC 测量方法 氨干扰 紫外氧化 电导检测 

分 类 号：TK227.8[动力工程及工程热物理—动力机械及工程] X832[环境科学与工程—环境工程]