撞击预燃室煤粉燃烧器燃烧特性数值模拟  

Combustion Simulation of Pre-combustion Chamber Pulverized Coal Burner

作　　者：李经宽[1,2] 王帅[2] 刘海玉[2] 樊保国[2] 金燕[2] 

机构地区：[1]山西大学动力工程系 [2]太原理工大学电气与动力学院

出　　处：《电站系统工程》2016年第5期1-4,10,共5页Power System Engineering

基　　金：山西省社会科学发展科技攻关项目(20130313001-1);山西省重点研发计划一般项目(201603D321021)资助

摘　　要：针对适用于劣质煤燃烧的新型撞击预燃室煤粉燃烧器,采用数值模拟的方法,研究其燃烧特性,得到了不同二次风进风角度和挡板角度下燃烧器流场分布、温度场分布、CO分布和NO分布。模拟研究表明,撞击预燃室燃烧器的煤粉燃烧分为两个阶段,在预燃室内第一阶段燃烧使风粉温度达到1300 K,这对劣质煤的稳定燃烧十分重要;挡板角度是影响预燃室内积灰的主要因素,挡板角度为45°时,挡板附近和预燃室内流场分布最合理。The flow field, temperature field, carbon monoxide and nitric oxide mole fraction of the burner in different baffle angle and secondary air angle are studied by the simulation of combustion and flow characteristics of impact pre-combustion chamber pulverized coal burner, which is suitable for low grade coal. It is concluded that combustion of pulverized coal is divided into two stages. The temperature of pulverized coal flow reaches 1300K in pre-combustion chamber after first stage, which is important for the stable combustion of low grade coal. The baffle angle has an important influence in particles deposit and flow field is more reasonable when the baffle angle is 45°.

关 键 词：煤粉燃烧器 燃烧模拟 流场分布 组分场 

分 类 号：TK223.23[动力工程及工程热物理—动力机械及工程]