某电厂600MW机组锅炉掺烧劣质煤制粉系统优化调整试验研究  

Optimization adjustment of pulverizing system for a 600 MW unit boiler burning mixed inferior coal

作　　者：李培[1] 梁增同 高振罡 李帅英[3] 周永刚[1] 赵虹[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027 [2]华电宁夏灵武发电有限公司,宁夏灵武751400 [3]西安热工研究院有限公司,陕西西安710032

出　　处：《热力发电》2013年第5期64-68,共5页Thermal Power Generation

摘　　要：对某电厂600MW机组掺烧劣质煤后的制粉系统进行了优化调整,并对调整前后机组的综合经济性进行了比较。结果表明:煤粉偏细和研磨出力不足是影响磨煤机出力的主要原因。通过制粉系统优化调整,磨煤机出力从50t/h左右增加到65t/h以上,机组可实现满负荷运行。虽然灰渣含碳量略有升高,锅炉效率降低0.27%,发电标煤耗升高0.9g/(kW·h),但单位制粉电耗降低17.4%,供电标煤耗降低2.4g/(kW·h),总体经济效益提高。Diagnosis and optimal adjustment tests for pulverizing system of a 600 MW unit boiler after using mixed inferior coal as the fuel was performed,and the unit comprehensive economy before and after the adjustment were compared.The results showed that,pretty small coal particle size and insufficient coal mill output were the major factors affecting the pulverizer's capacity.After the optimization,the coal mill capacity increased from ~50 t/h to above 65 t/h,indicating the coal mill capacity was dramatically improved and the unit realized running at full load condition.Although the slag carbon content had a slight increase,the boiler efficiency decreased by 0.27% and the standard coal consumption for power generation increased by 0.9 g/(kW·h),the electricity consumption of coal pulverizing per unit reduced by 17.4% and the standard coal consumption for power supply decreased by 2.4 g/(kW·h).The total economic benefit increased obviously.

关 键 词：磨煤机 制粉系统 劣质煤掺烧 煤粉细度 制粉电耗 煤耗 综合经济性 

分 类 号：TM621.2[电气工程—电力系统及自动化]