电站锅炉尾部受热面综合优化设计  

Comprehensive Optimization Design of the Tail Heating Surface in Utility Boiler

作　　者：郝卫 

机构地区：[1]神华国华(北京)电力研究院有限公司,北京100025

出　　处：《华东电力》2014年第1期193-197,共5页East China Electric Power

基　　金：国家重点基础研究发展计划项目(2011CB710706);国家自然科学基金联合基金项目(U1261210);重庆大学低品位能源利用技术及系统教育部重点实验室开放基金项目(kh3381)~~

摘　　要：在详细分析传统电站锅炉尾部受热面和常规低温省煤器布置方案的基础上,提出一种新型电站锅炉尾部受热面优化布置方案:把空气预热器分级布置,在分隔烟道内布置省煤器和高温空气预热器,在主烟道内,布置两级空气预热器,在两级空气预热器之间加装低温省煤器。结合某典型1 000 MW机组的电站锅炉,分析了新型电站锅炉尾部受热面优化布置方案的传热特性和节能效果。对案例电站在新型受热面优化布置方案下产生的经济效益进行了阐述。Based on detailed analysis of the traditional utility boiler tail heating surface and the layout scheme of the conventional low-temperature economizer, this paper proposes a new type of power plant boiler tail heating surface op-timal layout program. Thereby, hierarchically arrange the air preheater, install the economizer and high-temperature air preheater in the separated flue, fix the two-staged air preheaters in the main flue and the low-temperature economi-zer between the two-staged air preheaters. In combination with a typical 1000MW unit power station boiler, the heat transfer characteristics and the energy-saving effect of the proposed method are analyzed. Resuhs indicate that the hot air temperature can be increased by nearly 20℃, and the low-temperature economizer can save the extracted steam of the #5 regenerative heater from the steam turbine. The saving of standard coal equivalent （SCE） can reach at 4.6 g/ （ kW· h）. The annual amount of coal savings can approximate 26,000 tons and 26 million RMB per year （ with 5500 hours unit running time）.

关 键 词：电站锅炉 尾部受热面 综合优化 余热利用 

分 类 号：TM621[电气工程—电力系统及自动化] TK115[动力工程及工程热物理—热能工程]