低温高湿环境下低浓度烟尘测试方法研究  

Research on test method of low concentration particulate matter in flue gas with low temperature and high humidity

作　　者：祁志福[1,2] 寿春晖 邹正伟 邬东立 陈彪 刘春红 

机构地区：[1]浙江浙能技术研究院有限公司,浙江杭州310003 [2]浙江大学能源清洁利用国家重点实验室,浙江杭州310027

出　　处：《环境污染与防治》2017年第7期789-793,共5页Environmental Pollution & Control

基　　金：浙江省能源集团有限公司科技资助项目(No.ZN-KJ-15-013)

摘　　要：燃煤电厂是颗粒物重要的排放源之一。"超低排放"后,部分工况下烟气处于低温高湿条件,对烟尘测试工作带来挑战,尤其是低浓度时。选择某典型低温高湿的测试环境,比对研究了《固定污染源排气中颗粒物测定与气态污染物采样方法》(GB/T 16157—1996)和《固定污染源的排放在低浓度时颗粒物质(粉尘)的质量浓度的测定手工重量分析法》(ISO 12141:2002)两种烟尘测试方法,并依据国际标准化组织的"测量不确定度描述指南"(简称GUM)测量不确定度,评估了不同方法的测量不确定度。结果表明:低温高湿环境下,ISO 12141:2002测试数据的准确度、精密度均好于GB/T 16157—1996,同时ISO12141:2002测量不确定度明显低于GB/T 16157—1996;采用高等级天平、增加烟气采样体积和烟尘采样测试数量,可有效降低烟尘排放值测量不确定度。Coal-fired power plant was one of the important sources of particulate matter.After ultra-low emission reform,part condition of flue gas was low temperature and high humidity sometimes,which bringing challenges to the test of particulate matter concentration,especially when low concentration.In this paper,a comparative study of Chinese national standard＂Determination of particulates and sampling methods of gaseous pollutants emitted from exhaust gas of stationary source＂（GB/T 16157-1996）and International Standardization Organization（ISO）standard＂Stationary source emissions-determination of mass concentration of particulate matter（dust）at low concentrations-manual gravimetric method＂（ISO 12141：2002）was carried out in a typical test environment of low temperature and high humidity.The measurement uncertainty of the results of two methods was evaluated according to the＂Guide to the expression of uncertainty in measurement＂（GUM）published by ISO.It showed that the accuracy and precision of the data acquired by ISO 12141：2002were much better than that by GB/T 16157-1996.Meantime,measurement uncertainty of result acquired by ISO 12141：2002was less than that by GB/T 16157-1996.The measurement uncertainty of particulate matter emission concentration could be effectively reduced by using the high grade balance,increasing the volume of flue gas sampling and the quantity of particulate matter sampling.

关 键 词：烟尘排放值 超低排放 低温高湿 测量不确定度评估 

分 类 号：X773[环境科学与工程—环境工程]