煤粉锅炉新型风水联合干排渣系统构建及热平衡分析  

Conception and Heat Balance Analysis of Water-air Cooling Dry Slag Discharge System for Pulverized Coal-fired Boiler

作　　者：冯斌[1] 卢平[2] FENG Bin;LU Ping(Department of Power Generation,East China Electric Power Design Institute Co.,Ltd.,Shanghai 200063,China;School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing,Jiangsu 210023,China)

机构地区：[1]华东电力设计院有限公司发电分公司,上海200063 [2]南京师范大学能源与机械工程学院,江苏南京210023

出　　处：《上海电力大学学报》2020年第5期451-455,共5页Journal of Shanghai University of Electric Power

摘　　要：基于风水联合冷却的概念,提出了一种新型煤粉锅炉风水联合干排渣系统,由风冷式钢带冷渣机和间冷式滚筒冷渣器两级冷渣组成,依次利用空气和水冷却热渣,回收锅炉排渣的余热,并建立了风水联合干排渣和湿式刮板捞渣机的热平衡模型。1000 MW燃煤机组的热平衡分析与计算结果表明,风水联合干排渣系统具有显著的节能效果;与传统湿式刮板捞渣机相比,可节约煤耗约0.35 g/k Wh;与风冷式钢带机或链板机相比,能耗降低更多。Based on the conception of air-water combined cooling,a novel air-water cooling dry slag discharge system for pulverized coal-fired boiler was proposed,which consists of air-cooled steel strip machine and indirect water-cooled roller cooling machine,and the waste heat from boiler slag is successively recovered by using air and water cooling.The heat balance models of water-air cooling dry slag discharge and wet slag scraper conveyor were established based on the above conception.The heat balance analysis and calculation results of 1000 MW coal-fred boiler indicated that water-air cooling dry slag discharge system has a significant energy-saving effect.It can reduce the coal consumption about 0.35 g/kWh compared with traditional wet slag scraper conveyor,and can reduce more coal consumption compared with the air-cooled dry slag discharge system.

关 键 词：煤粉锅炉 干排渣系统 风水联合冷却 热平衡 锅炉效率 

分 类 号：TK223.2[动力工程及工程热物理—动力机械及工程]