300MW机组锅炉低压省煤器改造及经济性分析  

Analysis on Transformation of Low Pressure Economize of 300MW Unit Boiler and Its Economical Efficiency

作　　者：刘畅 卿山[1] 贾壮壮 徐佳瑞 

机构地区：[1]昆明理工大学,冶金与能源工程学院,云南昆明650093

出　　处：《工业加热》2017年第5期5-7,共3页Industrial Heating

基　　金：国家自然科学基金资助项目(51566005,51064015)

摘　　要：某厂1台300 MW循环流化床褐煤锅炉机组,在运行过程中,采用了降低床压的运行方式,使得锅炉排烟温度达到167℃,远高于设计值。排烟温度过高不仅会导致锅炉效率下降,还会影响布袋除尘的安全性。为了达到降低排烟温度与节能减排的目的,提出在锅炉尾部烟道加装低压省煤器的方案,并采用等效焓降法对加装低压省煤器后的机组进行了热经济分析。最终发现锅炉的排烟温度较之前降低了30℃,标准煤耗率下降了3.14 g/(k W·h)。As for a 300 MW circulating fluidized bed lignite boiler unit,reducing the pressure of its bed,make the temperature of the boiler exhaust reach 167℃,which is much higher than the design value. If the exhaust gas temperature is too high,it may reduce the boiler efficiency,and it may also affect the safety of bag dust. In order to reduce the temperature of exhaust gas and energy-saving,we propose to install low-voltage economizer program and analyze the economic efficiency of the low pressure economizer with equivalent enthalpy drop method. Finally it was discovered that exhaust gas temperature of the boiler decreased 30℃ and standard coal was saved 3.14 g/（k W·h）.

关 键 词：低压省煤器 等效焓降 经济性分析 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]