生物质固体成型燃料燃烧颗粒物的数量和质量分布特性  

Distribution characteristics of number and mass for particulate emission of biomass solid fuel combustion

作　　者：张永亮[1,2] 赵立欣[1] 姚宗路[1] 田宜水[1] 孟海波[1] 张学敏[2] 

机构地区：[1]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,北京100125 [2]中国农业大学工学院,北京100083

出　　处：《农业工程学报》2013年第19期185-192,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金："十二五"国家科技计划课题(2012BAD30B0202)

摘　　要：针对中国生物质固体成型燃料燃烧过程中排放的颗粒物粒径分布不清、燃烧功率和空气量对颗粒物分布影响不明等问题，该文在生物质燃烧试验平台上，采用低压电子冲击仪（electricallowpressureimpactor）设备，对玉米秸秆、棉杆、木质等3种固体生物质成型燃料分别开展了燃烧颗粒排放研究，重点研究了3种生物质成型燃料在不同功率下和不同空气量下的颗粒物的数量和质量分布。试验结果表明，3种燃料的颗粒物的数量峰值主要集中在4-7四级，占颗粒物总数量的70％以上；颗粒物质量峰值在7级和12级，占颗粒物总质量的50％以上。随着功率增加，颗粒物排放量先减小后增大，大粒径颗粒物增多，在14kW时颗粒物排放最少。随着空气量的增加，分布趋势不变，颗粒物总量减少。该研究为中国生物质固体成型燃料的颗粒物排放法规的制定提供参考。The development of biomass solid fuel is one of the effective ways to reduce crop residue waste and coal combustion. However, the distribution about particulate emission of biomass solid fuel under combustion condition has no precise data. More specifically, there is no clear relationship between two variations （burning power and air content） and performance of particle distribution. In terms of different types of solid biomass fuels - corn straw, cotton stalks and wood, this paper focuses on characteristics about particulate emission of these three biomass fuels under the combustion test platform condition by using electrical low pressure impactor （ELPI）. The solid biomass fuels manufactured and developed by Chinese Academy of Agricultural Engineering were compressed into a cylinder with diameter of 8 mm, length of 10-30 mm. In the first experiment, waste gas and particle distribution can be measured through combustion of such three biomass fuels. To be more precise, burning power as variation controlled by adjusting the feeding quantity was set to 10, 12, 14, 16 and 18 kW, and records lasted 30 minutes after the stable power. The result of the first experiment showed the particle emission of three kinds of fuels was the least at the power of 14 kW. To further explore the relationship between air content and distribution of particulate, in the second experiment the air intake as the variation was set to 6, 7, 8 m/s under the power of 14 kW condition. In this experiment, waste gas and particle distribution was measured and recorded in 30 minutes by ELPI at each wind speed after stable combustion. The measuring instrument, ELPI, which divided particles range into 12 grades, from 0.003- 10μm, can record each class of particle number and mass instantaneously. It focused on the particles＇ number concentration distribution and mass concentration distribution of three kinds of biomass forming fuel. The results showed that the peak particle number concentration of three kinds of fuels mainly concentrated in 4

关 键 词：燃料 颗粒物 排放控制 生物质 分布 

分 类 号：S216.2[农业科学—农业机械化工程]