燃气锅炉烟气余热回收潜力及影响因素分析  

Recovery Potential and Influencing Factors of Flue Gas Waste Heat in Gas-fired Boilers

作　　者：白凤臣[1] 马文姝 宋海江[1] BAI Fengchen;MA Wenshu;SONG Haijiang(Heilongjiang Polytechnic, Harbin 150080,Helongjiang,China;Guangzhou City Construction College, Guangzhou 510929,Guangdong,China)

机构地区：[1]黑龙江职业学院,黑龙江哈尔滨150080 [2]广州城建职业学院,广东广州510929

出　　处：《工业锅炉》2019年第3期5-9,13,共6页Industrial Boilers

摘　　要：介绍了天然气锅炉余热冷凝回收原理,分析了天然气燃烧产物的组份,提出了烟气显热和潜热的计算方法,并以燃气蒸汽锅炉为研究对象,对不同设计温度下烟气余热回收潜力进行了系统的分析计算,并对烟气余热回收影响因素进行了定量分析。结果表明,烟气中可回收的水蒸气潜热可使锅炉热效率提升10%以上,排烟温度越低,回收热量越多,锅炉热效率提升的幅度越大,但追求过低的排烟温度则会导致回收成本的增加。Introduces the principle of waste heat condensation recovery of natural gas boilers, analyzes the components of natural gas combustion products, and proposes the calculation method of sensible heat and latent heat of flue gas.Taking the gas boiler of heating boiler room in Heilongjiang Polytechnic as the research object, the residual heat recovery potential of flue gas at different design temperatures was systematically analyzed and calculated, and the influencing factors of flue gas waste heat recovery were quantitatively analyzed.The results show that the latent heat of steam recoverable in the flue gas can increase the thermal efficiency of the boiler by more than 10%.The lower the exhaust gas temperature, the more heat is recovered, the greater the increase in boiler thermal efficiency, but the lower the exhaust gas temperature, lead to an increase in recycling costs.

关 键 词：燃气锅炉 余热回收 过量空气系数 显热与汽化潜热 

分 类 号：TK222[动力工程及工程热物理—动力机械及工程]