燃油锅炉烟气冷凝余热回收技术探讨  

Discussion on Condensing Heat Recovery of Oil-fired Boiler

作　　者：王志勇[1,2] 刘畅荣[2] 王汉青[2] 寇广孝 

机构地区：[1]中南大学能源科学与工程学院 [2]湖南工业大学土木工程学院

出　　处：《建筑热能通风空调》2010年第3期78-80,87,共4页Building Energy & Environment

基　　金：湖南省科技计划重点项目(2007FJ2006)

摘　　要：通过分析排烟温度、过量空气系数等因素对排烟热损失的影响,对燃油锅炉不同排烟温度下的烟气余热回收节能潜力进行了理论计算。结果表明：采取冷凝余热利用技术,排烟温度由195℃降到40℃时,可以同时回收燃油锅炉排烟中的显热和潜热,能显著减小排烟热损失,锅炉热效率提高8%左右,冷凝余热回收潜力较大。Through analyzing the factors that influence exhaust heat loss,such as flue gas temperature and excess air,energy saving potential of waste heat recovery for oil-fired boiler in different flue gas temperature is calculated.Both theoretical calculations and economic analysis show that condensing heat recovery technology can enable the optimal recovery of both sensible and latent heat in exhaust flue gas and significantly reduce the exhaust heat loss.Thermal efficiency of oil-fired boiler can be increased 8% when the temperature of flue gas is reduced from 195℃ to 40℃.The potential of condensing heat recovery is remarkable.

关 键 词：燃油锅炉 烟气 热损失 冷凝 

分 类 号：TK115[动力工程及工程热物理—热能工程]