燃煤电厂烟气余热二次回收节能效果研究  

Study on Energy Saving Effect of Secondary Recovery of Exhaust Flue Gas Heat in a Coal-fired Power Plant

作　　者：金军 关键 林志明 徐伟 沈忠明 傅国涛 陈金鸿 吴学成[2] Jin Jun;Guan Jian;Lin Zhiming;Xu Wei;Shen Zhongming;Fu Guotao;Chen Jinhong;Wu Xuecheng(Zhejiang Zheneng Jiahua Power Generation Co., Ltd., Jiaxing 314201,Zhejiang Province, China;State Key Laboratory of Clean Energy Utilization,Zhejiang University, Hangzhou 310027, China)

机构地区：[1]浙江浙能嘉华发电有限公司,浙江嘉兴314201 [2]浙江大学能源清洁利用国家重点实验室,杭州310027

出　　处：《发电设备》2022年第3期164-169,共6页Power Equipment

基　　金：浙江省能源集团有限公司项目(嘉华计[2020]第72号)。

摘　　要：以某燃煤电厂660 MW机组为研究对象,在原有的一级烟气余热回收系统基础上,开展了增设二级烟气余热回收设备后的节能效果和经济性研究。计算结果表明:实施二级烟气余热回收改造能够使机组的供电煤耗率降低0.206 g/(kW·h)。二级烟气余热回收改造具有良好的可实施性,但其设备总投资较高,投资回收期约为9 a。Taking a 660 MW unit in a coal-fired power plant as the research object,for the existing primary exhaust flue gas heat recovery system,a study was conducted on the energy saving effect and economy with adding the secondary exhaust flue gas heat recovery equipment.Calculation results show that,through adopting the retrofit of the secondary exhaust flue gas heat recovery,the net coal consumption rate can be reduced by 0.206 g/(kW·h).The retrofit of the secondary exhaust flue gas heat recovery is a good technology with implementability,but the total equipment investment is high and the payback period of this retrofit is about nine years.

关 键 词：燃煤电厂 烟气余热回收 换热器 等效焓降法 

分 类 号：TM621.4[电气工程—电力系统及自动化]