低低温省煤器联合暖风器系统在300MW机组的应用  

Application of the system of low temperature economizer with steam-air heater on 300 MW power unit

作　　者：齐林虎 黄新元[2] 刘红英 

机构地区：[1]山东泓奥电力科技有限公司,济南250101 [2]山东大学能源与动力工程学院,济南250100

出　　处：《华电技术》2016年第10期22-24,77-78,共3页HUADIAN TECHNOLOGY

摘　　要：某电厂300 MW机组设计的低低温省煤器联合暖风器系统,将锅炉烟气余热回收用于加热汽轮机凝结水和锅炉侧冷风,实现机炉联合余热利用。系统投运后,可同时提高锅炉热效率和机组循环热效率,综合发电煤耗降低3.02g/(k W·h);同时,系统还可减轻空气预热器冷端低温腐蚀和堵灰,控制空气预热器烟气侧压降,提高电除尘器效率。最后,针对系统运行存在的问题提出了应对措施。For a certain 300 MW power unit,the designed system of low temperature economizer with steam-air heater could realize the combining waste heat utilization of turbine and boiler,which recover waste heat of flue gas to heat condensation water of steam turbine and cold air at boiler side. After the system put into operation,the boiler thermal efficiency and the circulating heat efficiency are both improved at the meantime,and the full load power generation coal consumption is reduced to 3. 02 g /( kW ·h). Besides,the system also could reduce the lowtemperature corrosion at the cold side and ash blocking of air preheater,control the pressure drop at flue gas side of air preheater,and improve the electrostatic precipitator efficiency. At the end of this paper,the countermeasures for existing problems in the system operation are proposed.

关 键 词：低低温省煤器 暖风器 空气预热器 热效率 发电煤耗 

分 类 号：TK221[动力工程及工程热物理—动力机械及工程]