定电位电解法与便携式紫外吸收法测定固定污染源二氧化硫的标准方法研究  

Study on Standard Methods for Measuring Sulfur Dioxide from Fixed Pollution Sources by Constant Potential Electrolysis Method and Portable Ultraviolet Absorption Method

作　　者：陈伟忠 CHEN Weizhong(Dongguan Ecological Environment Monitoring Center(Dongguan Solid Waste Management Center),Dongguan 523000,China)

机构地区：[1]东莞市生态环境监控中心(东莞市固体废物管理中心),广东东莞523000

出　　处：《中国资源综合利用》2023年第10期22-25,29,共5页China Resources Comprehensive Utilization

摘　　要：二氧化硫(SO_(2))是我国实行总量控制的大气污染物之一。目前,我国测定固定污染源SO_(2)浓度的标准方法主要有两种,即定电位电解法和便携式紫外吸收法。根据国家相关要求,燃煤、燃气等高污染排放源必须实施节能改造和超低排放,以控制SO_(2)排放总量。2022年,东莞市燃气锅炉项目开始分区、分时段执行《锅炉大气污染物排放标准》(DB 44/765—2019)的大气污染物特别排放限值,即SO_(2)≤35 mg/m^(3),这对SO_(2)排放浓度的监测提出更高要求。本文结合定电位电解法和便携式紫外吸收法的基本原理,比较两种测定方法,验证质量控制措施,从而选定更能真实反映烟气排放情况的监测方法,更加精准地监测固定污染源SO_(2)浓度。Sulfur dioxide(SO_(2))is one of the atmospheric pollutants that China implements total amount control.At present,there are two main standard methods for measuring the concentration of SO_(2) from fixed pollution sources in China,namely constant potential electrolysis method and portable ultraviolet absorption method.According to relevant national requirements,high pollution sources such as coal and gas must implement energy-saving transformation and ultralow emissions to control the total amount of SO_(2) emissions.In 2022,the gas boiler projects in Dongguan City began to implement the special emission limit for atmospheric pollutants specified in the“Boiler Air Pollutant Emission Standard”(DB 44/765—2019)in different zones and periods,with SO_(2)≤35 mg/m^(3),which puts forward higher requirements for monitoring the concentration of SO_(2) emissions.Combining the basic principles of constant potential electrolysis method and portable ultraviolet absorption method,this paper compares the two measurement methods,verifies quality control measures,thus selecting a monitoring method that can more accurately reflect the smoke emission situation,and monitoring the SO_(2) concentration of fixed pollution sources more accurately.

关 键 词：二氧化硫 固定污染源 定电位电解法 便携式紫外吸收法 测定 标准方法 

分 类 号：X831[环境科学与工程—环境工程]