火电机组水汽系统总有机碳(TOC)检测与规律研究

Detection and Law of TOC in Water and Steam System in Power Plants

通过对不同水源、不同工艺的水处理系统进行总有机碳(TOC)检测与分析,探讨不同水源在不同处理工艺中TOC的去除效果,揭示TOC在水处理及热力系统中的去除规律,最终表明不同水源经合理的系统设计其除盐水总有机碳含量均能满足控制要求。对比不同补给水单体设备的TOC去除能力,结合不同单体设备的去除机理,揭示出反渗透和阴离子交换器的TOC去除率较高,活性炭过滤器、其之前的预处理、阳离子交换器去除率次之,超滤和混合离子交换器TOC平均去除率较低。所检测热力系统给水和蒸汽品质整体状况较好,说明补给水处理和精处理总体运行状况均良好。

This paper detects and analyzes the total organic carbon( TOC) based on different water sources and different treatment processes of water treatments,and discusses TOC removal effects of different water treatment processes and reveals the TOC removal law in the water treatment and thermal system. The result shows that all TOCs in desalted water from different water sources can meet the control requirements by reasonable system design. By comparing TOC removal capability of different feed water equipments and combining with the different equipment removal mechanism,it is revealed that the reverse osmosis and anion exchangers have highest TOC removal efficiency,followed by activated carbon filters,pre-treatment and cation exchangers,and the average TOC removal rate of ultrafiltration and mixed ion exchangers is lowest. The detected water and steam systems are all in good condition,indicating that operations of the detected make-up water treatment system and condensate fine treatment system are in good condition.