BEST技术用于超超临界二次再热机组的可行性分析  

Feasibility Analysis on BEST Technology for Ultra Supercritical Units with Double-Reheat Cycle

作　　者：邓攀 王亚军 DENG Pan;WANG Yajun(Shenhua Guohua Guangtou(Beihai)Power Generation Company Limited,Beihai 536000,China;East China Electric Power Design Institute Co.,Ltd.,Shanghai 200063,China)

机构地区：[1]神华国华广投(北海)发电有限责任公司,广西北海536000 [2]中国电力工程顾问集团华东电力设计院有限公司,上海200063

出　　处：《中国电力》2018年第7期84-89,共6页Electric Power

摘　　要：为降低二次再热发电机组的回热抽汽过热度,提高机组经济性,提出了采用背压抽汽汽轮机(BEST)的节能配置方案。通过介绍BEST技术在回热汽源、排汽走向、材料选用等方面的特点,详细阐述了采用BEST技术的二次再热发电机组在设计、制造、运行与控制中的技术难点,对BEST技术用于高参数二次再热发电机组的可行性进行了技术探讨和经济性分析。分析结果表明,采用BEST技术,单台机组初投资可减少约2 400万元,年利润可增加约4 500万元。To lower the superheat degree of the extraction steam of the heat regenerative system and improve the economic efficiency of the double-reheat power generating units,an energy-saving plan with the backpressure extraction steam turbine(BEST)allocated is proposed.Through the introduction of the BEST characteristics such as heat recovery steam source,exhaust direction and material selection,the technical issues in the design,manufacturing,operation and control of the double-reheat power generating units adopting BEST are presented,and the feasibility and economic performance of BEST used in high-parameter double-reheat power generating units are also analyzed.The analysis results show that with the BEST technology adopted,the investment of single unit can be reduced by about 24 million RMB while the annual profit can be increased by about 45 million RMB.

关 键 词：燃煤发电 二次再热循环 回热系统 背压式抽汽汽轮机(BEST) 双馈电机 调速箱 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]