制粉系统运行方式对降低排烟温度的影响研究  

RESEARCH ON EFFECTS OF COAL PULVERIZATION SYSTEM'S OPERATION MODE TO REDUCING BOILER FLUE GAS TEMPERATURE

作　　者：曹伟[1] 安连昌[1] 赵虹[2] 周永刚[2] 

机构地区：[1]姚孟发电有限责任公司,河南平顶山467031 [2]浙江大学,杭州310027

出　　处：《热力发电》2000年第4期45-46,49,共3页Thermal Power Generation

摘　　要：导致姚孟电厂２号炉排烟温度偏高的一个重要因素是运行时掺入制粉系统和一次风的冷风量偏大，减少了经过空气预热器的热风量。在增加磨煤机再循环风管的同时缩小一次风管径，使进入炉膛的冷风量减少了８．１２％（总风量）。经过计算，预测排烟温度因此可以降低１３℃，实际改造后排烟温度降低了１５．１℃，锅炉效率提高了０．８２３％。One important factor causing flue gas temperature higher in No. 2 boiler of Yaomeng power plant is too much cool air mixed into coal pulverization system and the primary, which reduces the flow to air preheater. Through installing recirculation tube on the mill and shrinking the primary air pipe diameter, the percentage of cool sir to combustor is reduced by 8. 12% .The calculation predicts 13℃ flue gas temperature decrease. The retrofit test shows that the temperature is reduced by 15. 1 ℃. The boiler efficiency is improved by 0. 823%.

关 键 词：排烟温度 制粉系统 锅炉 运行方式 电厂 

分 类 号：TK223.25[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]