造粒塔排放尾气粉尘测定方法探讨

摘要

After the tail gas from urea prilling tower was scrubbed through spraying, the filtering membrane mass dust measuring method and the photo-electricity reading dust measuring method were usually used in measure of urea dust content.Author has analyzed the inaccurate reason for measured re-sults by filter membrane mass dust measuring method and photo -electricity dust measure reading method; has discussed the influence of the variation of ex-amples before /after scrubbing for tail gas from prilling tower on the measuring of accuracy ; has supposed the scheme to adopt chemical measure method. Result indicates that chemical measure method is more suitable for measuring urea content in tail gas discharged from urea prilling tower .%尿素造粒塔尾气经过喷淋洗涤后，尿素粉尘含量的测定通常采用滤膜质量测尘法和光电直读测尘法。分析了滤膜质量测尘法和光电直读测尘法测定结果不准确的原因；探讨了造粒塔尾气洗涤前后样品发生的变化对测定准确性的影响；提出了采用化学测定法的方案。结果表明，化学测定法更适合于尿素造粒塔排放尾气中尿素含量的测定。