发电厂锅炉烟气余热回收方案热经济性研究

分析某发电厂锅炉排烟余热回收利用的热经济性,提出了供暖期利用烟气余热进行供暖、非供暖期利用烟气余热加热凝结水的回收方案。研究表明,采用该方案,供暖期可节约标准煤987.9 t/a,非供暖期可节约标准煤883.1 t/a,合计每年可节约标准煤1 871 t,具有良好的节能减排效果。

Thermal Economy Analysis on Waste Heat Recovery of the Exhaust Flue Gas of Boiler in Power Plant

This paper presents a case study of recovering waste heat of the exhaust flue gas of boiler in a power plant.The waste heat can be recovered by installing a low temperature economizer.The low temperature economizer can save the steam extracted from the turbine to heat the condensed water to gain extra work in un-heating period,in the heating period,it heat the circulating water for civilian using.Analysis results show that it is feasible to install a low temperature economizer for recovering the heat of exhaust flue gas in power plant,which has sound effect on energy saving and emission reduction.The benefits generated include saving of standard coal equivalent about 987.9 t in the heating period and 883.1 t in un-heating period.The total annual saving of standard coal is about 1 871 t.