生物质固定燃烧源烟气稀释采样装置设计与试验

发布时间：2018-05-17 03:22

本文选题：生物质 + 固定燃烧源　；参考：《农业机械学报》2016年03期

【摘要】：针对现有的稀释通道多级采样装置存在稀释比小、停留时间短和便携性能差等问题,根据生物质成型燃料燃烧排放高温烟气中的大气颗粒物数量和质量分布特点,采用二级稀释、反馈调节和射流的原理,设计了生物质固定燃烧源烟气稀释采样装置。该装置由采样枪、一级稀释系统、二级稀释系统、洁净空气发生系统、撞击采样装置等部分组成。装置加工完成后,采用木质成型燃料开展颗粒物采样试验,试验结果表明,该装置能够模拟固定燃烧源排放烟气进入大气环境中的稀释冷凝过程,稀释比达30,停留时间90 s,试验采集得到8种不同粒径级别的大气颗粒物,其中粒径在0.4~1.1μm之间颗粒物占总采集颗粒物的55.5%~68.1%。研究发现采样装置对空气动力学直径在1.1μm以下的大气颗粒物有较好的采样效果。
[Abstract]:Aiming at the problems of low dilution ratio, short residence time and poor portability in the multistage sampling device of dilution channel, the quantity and quality distribution characteristics of atmospheric particulate matter in high temperature flue gas from biomass briquetting fuel combustion were analyzed. Based on the principles of two-stage dilution, feedback regulation and jet flow, a flue gas dilution sampling device for biomass stationary combustion source was designed. The device consists of sampling gun, primary dilution system, secondary dilution system, clean air generating system, impact sampling device and so on. After processing, the particle sampling test was carried out with wood-shaped fuel. The experimental results showed that the device could simulate the dilution and condensation process of flue gas from fixed combustion source into the atmosphere. After dilution of Prida 30 and residence time of 90 s, eight kinds of atmospheric particles with different particle sizes were collected, in which the particle size of 0.40 渭 m accounted for 68.1% of the total particles collected. It is found that the sampling device has a good effect on the sampling of atmospheric particulates with aerodynamic diameter less than 1.1 渭 m.
【作者单位】：农业部规划设计研究院农业部农业废弃物能源化利用重点实验室;黑龙江八一农垦大学工程学院;
【基金】：北京市科技新星项目(2131105000413036)
【分类号】：X851

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