摘要
GB/T 16157-1996中推荐的采样测试方法,仅适用于颗粒物浓度高于50 mg/m3的固定污染源采样。伴随着排放标准的提高,污染物控制技术与工艺日趋完善,部分示范工程颗粒物排放在线数据显示低于1 mg/m3,沿用原方法采样经常出现样品失重现象,从而无法得到烟气中真实的低浓度粉尘排放浓度。经多次试验研究,通过采用一体式低浓度采样头和大流量采样泵,增加采样体积、预留空白样、选用优质滤膜、对采样枪进行伴热改造等措施,针对低浓度排放测试的准确性和可靠性得到很大的提高,该法已在实际工程上得到应用,为我国颗粒物低排放测试技术的规范与成熟提供借鉴。
The traditional testing method mentioned in GB / T 16157- 1996 only apply to stationary source with more than 50 mg / m^3 particulate concentration. Pollution control technologies and processes are maturing with the strict emission standards,the online data of some demonstration projects show the emissions of particulate are less than 1 mg / m^3. There are often occurring weightlessness phenomenon if following the traditional testing methods,thus it cannot get real concentration of dust emission in flue gas. Through repeated experiments and practice,the weightlessness problem can be effectively solved by using one- piece sampling- head and high flow sampling pump,increasing the sampling volume,reserving blank samples,choosing high- quality filter membrane and heating sampling gun,and the accuracy and reliability have been greatly improved. The method has been applied in practical engineering,provided reference for practical engineering.
出处
《电力科技与环保》
2015年第5期28-31,共4页
Electric Power Technology and Environmental Protection
基金
国家高技术研究发展计划(863计划)(2013AA065004)
关键词
低浓度
粉尘
测试
low concentration
dust
test
