带排烟余热回收的CFB锅炉节能分析  

Energy-saving Analysis of a CFB boiler with the Waste Heat Recovered from the Exhaust Gases

作　　者：赵斌[1] 张路涛[1] 吕太[2] 闫晨帅[2] 

机构地区：[1]河北联合大学冶金与能源学院,河北唐山063009 [2]东北电力大学能源与动力工程学院,吉林吉林132012

出　　处：《热能动力工程》2013年第5期497-501,553,共5页Journal of Engineering for Thermal Energy and Power

基　　金：河北省科学技术研究与发展计划基金资助项目(11213941)

摘　　要：采用分离式热管空气预热器回收低温烟气余热的CFB锅炉系统(简称RGCFB),建立了烟风阻力、风机电耗和净效率模型。并以京玉电厂1号CFB锅炉的运行参数为基础,对CFB锅炉和RGCFB锅炉进行了4种工况的热效率和净效率对比分析。结果表明:RGCFB锅炉较CFB锅炉热效率提高了1.28～2.23个百分点,净效率提高0.51～1.18个百分点。最后分析了影响RGCFB锅炉净效率的因素,指出了以净效率作为锅炉运行的评价指标,可有效指导锅炉的经济运行。Presented was a CFB boiler system( referred to as RGCFB for short) for recovering the low temperature flue gas waste heat by utilizing a separation type heat pipe air preheater and established was a model for calculating the flue gas and air resistance,fan power consumption rate and net efficiency. On the basis of the operating parameters of No. 1 CFB boiler in Jingyu power plant,a contrast and analysis were performed of the thermal efficiency and net efficiency of the CFB and RGCFB boiler under four operating conditions. The research results show that the thermal efficiency of the RGCFB boiler is 1. 28 to 2. 23 percentagepoints higher than that of the CFB boiler and the net efficiency is 0. 51 to 1. 18 percentage points higher than that of the CFB boiler. Finally,the factors influencing the net efficiency of the RGCFB boiler were analyzed and the fact that to use the net efficiency as an index for evaluating the operation of a boiler can effectively guide the economic operation of the boiler was pointed out.

关 键 词：CFB锅炉 排烟余热回收 理论模型 净效率 影响因素 RGCFB（低温烟气CFB） 

分 类 号：TK115[动力工程及工程热物理—热能工程]