烟气余热换热器的热力学和经济性分析  

Thermodynamic and Economic Analysis of Flue Gas Wasteheat Exchanger

作　　者：马千里[1] 

机构地区：[1]江苏省电力设计院,江苏南京211102

出　　处：《能源与节能》2011年第7期39-40,49,共3页Energy and Energy Conservation

摘　　要：叙述了超超临界1 000 MW火力发电机组塔式锅炉设置烟气余热换热器的方案,指出,在引风机出口烟道装设余热换热器,将烟气温度从123℃(THA工况)降至80℃,经过热力学分析,把回收的热量送入凝结水回热系统,可降低发电标煤耗1.06 g/kW.h,每台机组可减少脱硫用水40.7×104 t/a。The flue gas heat exchanger settled in the updraft boiler of 1000MW coal power plant is demonstrated in this paper.The exchanger is installed in the exiting flue gas duct of the induced draft fan.So that the temperature of flue gas can be decreased from 123 ℃ to 80 ℃（THA operating condition assumed）.The recycled heat is back into the condensation water system.Thermodynamic analysis shows that it can reduce standard coal consumption 1.06g / kWh and reduce annual water consumption of desulfuration 407,000 tons per unit.

关 键 词：余热利用 换热器 电站锅炉 

分 类 号：TK172[动力工程及工程热物理—热能工程]