山东建筑大学学报2017，Vol.32Issue(4)：327-332,6.
电站低低温烟气余热利用系统熵产分析
Entropy generation analysis of the super-low temperature flue gas heat recovery system in thermal power plants
摘要
Abstract
Super-low temperature treatment of boiler flue gas in thermal power plants is one of high-efficient techniques in dust removal and desulfurization.In a super-low temperature flue gas waste heat recovery system (super-low FGWHRS),the waste heat coming from flue gas cooling is reused to save energy.It is of great significance for power plant energy conservation to efficiently utilize the waste heat and accurately evaluate its energy saving effect.Based on the second law of thermodynamics,the energy loss model of each process was established using entropy generation method combined with equivalent enthalpy analysis.Based on the developed model,the heat economy and energy losses of each process of the super-low FGWHRS of a subcritical unit with the tipe of N300 -16.7/537/537-7 were analyzed.The results show that the main influencing factor on the system thermal efficiency is the exhaust gas energy of the boiler,accounting for 85.23％ of total loss of working capacity.The studied system reduces the exhaust gas temperature of the boiler from 138 to 90 ℃.As a result,the plant efficiency is improved by 0.66％,saving standard coal consumption rate of 2.15 g/(kW · h).Emission reduction and energy saving are achieved.关键词
低低温烟气处理/电站节能/熵产分析/经济性Key words
super-low temperature flue gas treatment/energy conservation/entropy generation analysis/economic performance分类
能源科技引用本文复制引用
陆万鹏,孙浩森,赵元东..电站低低温烟气余热利用系统熵产分析[J].山东建筑大学学报,2017,32(4):327-332,6.基金项目
国家发改委-电力行业低碳技术创新及产业化示范工程项目(发改办高技[2013] 1819号) （发改办高技[2013] 1819号）
山东建筑大学博士基金项目(0000601336) （0000601336）
