1 000 MW超超临界机组回热系统热经济性分析  

Thermo-Economic Analysis of Heat Return System for 1 000 MW Ultra-Supercritical Unit

作　　者：李颖杰 Li Yingjie(Taiyuan No.2 Thermal Power Plant,Datang Shanxi Power Generation Co.,Ltd.,Taiyuan Shanxi 030000,China)

机构地区：[1]大唐山西发电有限公司太原第二热电厂,山西太原030000

出　　处：《现代工业经济和信息化》2023年第9期282-284,287,共4页Modern Industrial Economy and Informationization

摘　　要：针对N1000-25/600/600超超临界机组回热抽汽级数优化进行分析与研究,利用热平衡法及热力学方程,计算抽汽级数分别为8段和9段时回热系统热经济性。结果显示,相比于8段抽汽,9段抽汽的回热系统可使全厂热耗率降低285.12 kJ/(kW·h),全场发电标准煤耗率减少0.00976 kg/(kW·h),折合计算1台机组20年总收益,可增加2610.60万元。The optimisation of the number of heat rejection stages of N1000-25/600/600 ultra-supercritical unit is analysed and investigated,and the thermal economy of the heat rejection system is calculated when the number of steam rejection stages is 8 and 9 respectively by using the heat balance method and thermodynamic equations.The results show that compared with the 8-stage extraction,the 9-stage extraction heat return system can reduce the heat consumption rate of the whole plant by 285.12 kJ/(kw-h),and the standard coal consumption rate of the whole site power generation by 0.00976 kg/(kw-h),which is equivalent to calculate the total revenue of one unit for 20 years,and can increase 26.1060 million Yuan.

关 键 词：超超临界 回热系统 抽汽级数 热经济 

分 类 号：TM521[电气工程—电器]