Advances in the detection of chlorides in desulfurization wastewater of coal-fired power plant

doi:10.16085/j.issn.1000-6613.2017-2581

Abstract

Abstract: In recent years, the zero discharge of desulphurization wastewater has attracted much attention as an important measure to control pollutant discharge in coal-fired power plants. Especially, the detection methods of chloride ion content in desulphurization wastewater have become the research focuses. In this paper, the categories and methods of the chloride detection in desulphurization wastewater were briefly presented. On the basis of the principles of four kinds of chlorine ion analysis methods in capacity analysis, chromatographic analysis, optical analysis and electrochemical analysis, seven kinds of chloride ion detection methods and practical applications, such as silver nitrate titration, ion chromatography, atomic absorption spectrometry, spectrophotometry, long period fiber grating, potentiometric titration and ion selective electrode have been introduced. Furthermore, the special conditions in desulphurization wastewater were compared. Finally, the development trend of chlorine detection method in desulfurization wastewater from coal-fired power plants was prospected. Ion selective electrode has the advantages of fast response, easy miniaturization and online monitoring. It is the most suitable technology for developing the standard method of chloride detection in desulphurization wastewater.

Key words: chemical analysis, desulfurization wastewater, chloride ion, on-line monitoring, ion selective electrode method

摘要： 近年来脱硫废水零排放作为燃煤电厂中控制污染物排放的重要措施而备受关注，特别是脱硫废水中氯离子含量的检测手段和方法已经成为研究热点。本文简述了适用于脱硫废水中氯离子检测的类别和方法，在阐述容量分析、色谱分析、光学分析和电化学分析4类氯离子分析方法原理的基础上，进一步介绍了硝酸银滴定法、离子色谱法、原子吸收光谱法、分光光度法、长周期光纤光栅法、电位滴定法和离子选择电极法7种氯离子检测方法及实际应用，并针对脱硫废水特殊条件对7种检测方法进行了比较，最后对燃煤电厂脱硫废水氯离子检测方法的发展趋势进行了展望。离子选择电极法具有响应快速、易微型化、在线监测等优点，是最适合发展成为脱硫废水氯离子检测标准方法的技术。

关键词: 化学分析, 脱硫废水, 氯离子, 在线监测, 离子选择电极法

CLC Number:

X701.3

MA Shuangchen, XU Fang, XU Dongsheng, LI Defeng, FAN Zixuan, FAN Shuaijun, PANG Weiying. Advances in the detection of chlorides in desulfurization wastewater of coal-fired power plant[J]. Chemical Industry and Engineering Progress, 2018, 37(10): 4044-4052.

马双忱, 徐昉, 徐东升, 李德峰, 范紫瑄, 樊帅军, 庞蔚莹. 燃煤电厂脱硫废水氯离子检测现状与应用进展[J]. 化工进展, 2018, 37(10): 4044-4052.

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