燃煤发电机组机炉耦合系统经济性的对比分析  

Comparison on Economic Performances of Boiler-Turbine Coupling Systems for Coal-fired Power Plants

作　　者：唐丽丽[1] 谢林贵 赖强[1] 刘明[2] TANG Li-lil;XIE Lin-gui;LAI Qiang;LIU Ming(Dongfang Turbine Co.,Ltd of Dongfang Electric Corporation,Deyang,China,618000;State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an,China,710049)

机构地区：[1]东方电气集团东方汽轮机有限公司,四川德阳618000 [2]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《热能动力工程》2022年第10期81-86,共6页Journal of Engineering for Thermal Energy and Power

基　　金：国家重点研发计划(2018YFB0604405);国家自然科学基金(51776146);四川省工业发展资金项目(川财建【2018】113号)。

摘　　要：为了研究燃煤发电机组机炉耦合系统的经济性,以某典型660 MW超超临界燃煤机组为例,建立了节煤收益与系统投资模型,对常规低压省煤器系统、采用暖风器的机炉耦合系统以及设置旁路烟道的机炉耦合系统等3种机炉耦合系统的经济性进行了对比分析。计算结果表明:在相同的边界条件下,3种机炉耦合系统的净节能效果分别可以达到1.60,2.64和3.32 g/(kW·h),系统换热设备投资分别为530,1 146和1 177万元,系统的年节煤净收益分别达到了307,501和636万元;常规低压省煤器系统的投资最低,但是节能效果最差;采用暖风器的机炉耦合系统的节能效果有所提高,但是系统投资高;设置旁路烟道的机炉耦合系统的经济性最优。In order to evaluate the economy of turbine-boiler coupling system of coal-fired power units,a typical 660 MW ultra-supercritical coal-fired power unit was taken as the reference case,economic performances on three coupling systems,i.e.,conventional low-pressure economizer system,coupling system with air heater and coupling system with bypass flue,were analyzed comparatively by developing the models of coal-saving benefits and system investments.With the same boundary condition,the calculation results show that the net energy-saving effects of the three types of boilers coupling systems can reach 1.60,2.64 and 3.32 g/(kW·h),respectively.The system investments for heat exchangers are 5.30,11.46 and 11.77 million yuan,respectively.The annual net coal-saving benefits of the system are 3.07,5.01 and 6.36 million yuan,respectively.Among three coupling systems,the conventional low-pressure economizer system has the lowest system investment,while the energy-saving effect is the worst;both the system energy-saving effect and the investment have increased in coupling system with air heater.The economic performances of boiler-turbine coupling system with bypass flue is the best.

关 键 词：机炉耦合 余热回收 旁路烟道 热经济性 技术经济性 

分 类 号：TK115[动力工程及工程热物理—热能工程]