几种无油直接点火煤粉燃烧器机理浅析  

ELEMENTARY ANALYSIS OF MECHANISM GOVERNING SEVERAL COAL-POWDER BURNERS USED FOR OILLESS DIRECT IGNITION

作　　者：李文蛟[1] 邱建荣[1] 李琳琅[2] 岑可法[3] 郑楚光[1] 

机构地区：[1]华中科技大学,湖北武汉430074 [2]西安交通大学,陕西西安710049 [3]浙江大学,浙江杭州310027

出　　处：《热力发电》2003年第2期62-64,共3页Thermal Power Generation

摘　　要：浅析了 3种形式的无油直接点火煤粉燃烧器的点火机理 ,提出了无油点火过程中火炬的扩张理论 ,这一理论较明晰地反映了着火进程。影响火炬扩张的因素有 :初始火炬能量强度 β、火炬卷吸扩张因子a1,(x) 、扩散引起的扩张因子a2 ,(x) 。煤粉火炬在扩张过程中 ,随时间、空间、空气动力场等的变化 ,火炬扩张的形式不同。 3种形式的无油直接点火煤粉燃烧器性能各异 。An elementary analysis of ignition mechanism governing three types of coal-powder burners used for oilless direct ignition has been made, and a torch expanding theory in the process of oilless direct ignition being suggested. The said theory can distinctly reflect the process of catching fire. The factors influencing upon torch expanding are: the energy intensity B of initial torch; expanding factor (α)1, (x) due to torch's rolling suction; and expanding factor (α)2 , (x) caused by diffusion. In the expanding process, the coal powder torch's expanding form is varying with the change of time, space, and air flow field. The performance of coal-powder burners for three said types is different, an appropriate direct ignition style should be determined on the basis of fuel coal properties etc..

关 键 词：无油直接点火 煤粉燃烧器 锅炉 电站 

分 类 号：TK223.23[动力工程及工程热物理—动力机械及工程] TM621.2[电气工程—电力系统及自动化]