煤与废弃物混烧过程中PM10生成特性  

Formation Characteristics of PM10 During Co-combustion of Coal with Waste

作　　者：张煜枫 刘小伟[1] 徐义书[1] 綦久鑫 胡子文 徐明厚[1] Zhang Yufeng;Liu Xiaowei;Xu Yishu;Qi Jiuxin;Hu Ziwen;Xu Minghou(State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学煤燃烧国家重点实验室,武汉430074

出　　处：《燃烧科学与技术》2020年第5期438-443,共6页Journal of Combustion Science and Technology

基　　金：国家优秀青年科学基金资助项目(51922045);国家自然科学基金委国际合作重大资助项目(51661125011)。

摘　　要：在1 500℃的高温沉降炉中进行了一种高硅铝煤(大同煤)和一种工业废弃物(茶叶茎)的单烧与混烧实验,探讨了混烧过程中矿物的交互反应对PM10生成特性的影响.实验结果表明,灰基准下废弃物单烧时PM1生成量远大于煤,原因是其碱金属含量较高,而废弃物PM1-10的生成量则略小于煤.混烧时煤中硅铝酸盐对碱金属蒸气的吸附作用抑制了碱金属的气化凝结从而促进PM1的减排;混烧时生成了熔点更低的颗粒促进了碰撞聚合作用从而导致了PM1-10的减排.In this paper,a high-silica-aluminum coal,an industrial solid waste and their blends were burned in a laboratory-scaled drop tube furnace at 1500℃,respectively.The effects of mineral interactions on PM10 formation during the combustion were discussed.Experimental results show that the amount of PM1 produced by the burning of the waste was much larger than that of the coal due to a high content of alkali elements.The amount of PM1-10 produced by the waste was slightly smaller than that by the coal.The adsorption of alkali metal vapour by aluminosilicate in coal inhibited the gasification and condensation of alkali metal and promoted the reduction of PM1 during co-combustion.The formation of particles with lower melting point promoted the collision and led to the reduction of PM1-10.

关 键 词：PM10 混烧 煤 废弃物 交互反应 

分 类 号：TK16[动力工程及工程热物理—热能工程]