现代电力2013，Vol.30Issue(1)：75-80,6.
电站锅炉烟气余热利用的热力学分析与优化设计原则
Thermodynamic Analysis and Optimum Design Principles of the Heat Recovery of Utility Boilers' Flue Gas
摘要
Abstract
The heat recovery of utility boiler flue gas, used to heat condensed water in the feed water system, can squeeze out proportion of the extraction to return the turbine to continue expansion of acting work. It partly improves unit efficiency and reduces plant coal consumption. Based on the selected working conditions of typical ultra-supercritical units and combined with engineering constraints, this paper carries out a variety of typical integrated excogitations of heating condensed water by utilization of flue gas heat recovery. Both equivalent enthalpy drop method and conventional thermal balance method are used for thermo-dynamic comparison and analysis. The research shows that computed results of the two methods are very close, which can check each other under engineering computation. On condition that low temperature economizer meets the constraints, it will have better energy conservation effects when high-grade steam extraction is replaced. Simultaneously, reasonable series-parallel connection methods may achieve much better thermal and comprehensive performance.关键词
电站节能/低温余热利用/热力学分析/常规热平衡法/等效焓降法Key words
power plant energy saving/ low-temperature waste heat utilization/ thermodynamic analysis/ conventional thermal balance method/ equivalent enthalpy drop method分类
信息技术与安全科学引用本文复制引用
黄圣伟,徐钢,杨勇平,刘超,刘文毅,杨志平..电站锅炉烟气余热利用的热力学分析与优化设计原则[J].现代电力,2013,30(1):75-80,6.基金项目
国家重点基础研究发展计划项目(973计划)(2009CB219801,2011CB710706) （973计划）
国家自然科学基金项目(51025624) （51025624）
国际科技合作项目(2010DFA72760-609) （2010DFA72760-609）
