热力发电Issue(9)：57-60,65,5.DOI:10.3969/j.issn.1002-3364.2015.09.057
燃煤机组锅炉低温烟气余热利用节能效益分析
Energy-saving analysis for heat recovery from low-temperature flue gas in coal-fired units
摘要
Abstract
Installing low pressure economizer in tail flue duct of boilers can reduce exhaust temperature and enhance the boiler efficiency.The waste heat of flue gas is introduced into regenerative system of the steam turbine,so part of the exaction steam will return into the turbine to do work,thus to improve energy utili-zation efficiency of the unit.Taking a 100 MW unit coal-fire power unit as the example,the energy-saving effect of the above waste heat utilization technology was verified by applying the iteration-check method and the equivalent enthalpy drop method.The results show that,this waste heat recovery transformation scheme can reduce the exhaust temperature by 23.7 ℃,increase the boiler efficiency by 1.214%,decrease the heat rate by 60 kJ/(kW·h)and save the coal consumption by 2.313 g/(kW·h).关键词
燃煤机组/锅炉/低压省煤器/低温烟气/余热利用/热经济性/迭代-校核法/等效焓降法Key words
coal-fired power unit/boiler/low pressure economizer/low temperature flue gas/heat recovery/thermal economy/iteration-checking/equivalent enthalpy drop method分类
能源科技引用本文复制引用
宋景慧,刘桂才,廖艳芬,马晓茜..燃煤机组锅炉低温烟气余热利用节能效益分析[J].热力发电,2015,(9):57-60,65,5.基金项目
广东省能源高效清洁利用重点实验室资助项目(2013A061401005) （2013A061401005）
能源高效清洁利用广东普通高校重点实验室资助项目(KLB10004) （KLB10004）
