1000MW机组锅炉烟气余热利用空气预热器烟气旁路方案关键技术问题研究  

Study on Heat Recovery from Flue Gas in 1 000MW Power Plant by Using the System of Gas Bypass of Air Preheater

作　　者：靖长财 杨富鑫 谭厚章[2] 王顺森[2] 

机构地区：[1]神华国华(北京)电力研究院有限公司,北京100025 [2]西安交通大学能源与动力工程学院,陕西西安710049

出　　处：《锅炉技术》2017年第4期19-22,共4页Boiler Technology

摘　　要：针对百万机组锅炉的烟气余热利用,采用空气预热器烟气旁路方案,并对烟气旁路分流量、分段烟气温度、冷风加热温度、给水和凝结水介质温度、低温省煤器布置等5项关键技术进行了分析,提出了应对措施。结合某1 000 MW燃煤机组,采用空气预热器烟气旁路方案,对锅炉的烟气余热利用系统进行了优化,使得机组供电煤耗降低2.9g/(kW·h),节能效果显著。To recover the waste heat from flue gas in 1 000 MW power plant, a system of gas bypass of air preheater is proposed. For further optimizing the system, this paper discusses the key issues that affect the efficiency of energy saving, e.g. the flue gas amount bypassed the air preheater, the flue gas temperature at split flow, the air temperature after being heated, the temperatures of the feed water and condensation water and the location of low temperature economizer; moreover, the solutions for these issues are presented. The waste heat recovery system of a 1 000 MW power plant is optimized by the system of gas bypass of air preheater, and the results show that the standard coal consumption will be reduced by 2. 9 g/（kW.h）.

关 键 词：锅炉 烟气余热 空气预热器烟气旁路 

分 类 号：TK223.34[动力工程及工程热物理—动力机械及工程]