摘要
对ZGM113G-II型磨煤机进行特性试验及相关分析,找出了制粉系统运行不合理的原因,并指出了调整方向。研究结果表明:各试验工况下煤粉细度R90值在4%～13%,均匀性指数n在0.66～1.17;大多试验工况下的风环风速低于85m/s;磨煤机最大给煤量可以达到75t/h,对应的磨煤电耗为6.123kW.h/t;从缓解结焦的角度出发,应将折向挡板开度设置在60%/60%;磨煤机给煤量应尽可能设置在65～70t/h;一次风压应控制在10～12kPa;液压加载压力控制在7.5～9.5MPa。
By performance tests and corresponding analysis to the ZGM113G-II type mill, causes leading to irrational operation of the pulverizing system have been found out, to which an adjustment way is put forward. Study results show that the fineness R 90 of pulverized coal is within 4% - 13% under various test conditions, and the uniform index n is within 0. 66-1.17; the air flow rate at air ring area is below 85 m/s under most test conditions; the maximum coal feed rate is 75 t/h, with a corresponding mill power consumption of 6. 123 kW.h/t; from the point of view of coking relieving, the deflector baffle opening should be set at 60/60; the coal feed rate would better be set within 65-70 t/h, while the primary air pressure be controlled within 10-12 kPa and the hydraulic loading pressure be controlled within 7.5-9.5 kPa.
出处
《发电设备》
2012年第4期252-255,共4页
Power Equipment
关键词
中速磨煤机
煤粉细度
风环风速
容积强度
结焦
medium speed coal mill
pulverized coal fineness
air flow rate at air ring area
heat release rate
coking
