空气预热器烟气入口增设非平衡换热器的可行性分析  

Feasibility of adding non-balance heat exchanger at gas inlet of air preheater

作　　者：王春昌[1] 

机构地区：[1]西安热工研究院有限公司,陕西西安710032

出　　处：《热力发电》2014年第5期13-15,共3页Thermal Power Generation

基　　金："十二五国家科技支撑计划"电站锅炉"排烟余热及水分回收技术研究"(2012BAA071301)

摘　　要：针对回转式空气预热器的旋转特性、低温腐蚀堵灰特征以及出口烟气温度分布规律,提出了在空气预热器入口设置非平衡换热器,将烟道分隔为几个小烟道,通过适度地降低各个小烟道的入口烟气温度,使锅炉排烟温度分布趋于平衡并整体有所降低,最终达到进一步降低锅炉排烟温度的目的,提高锅炉热效率或机组热效率。Against the rotating characteristics,low temperature corrosion ash deposition perform-ance and outlet gas temperature distribution rule of the rotary air preheater,it suggests non-bal-ance heat exchanger be added at the air preheater inlet and the flue duct be divided into several small ones.By properly reducing the inlet gas temperature of each small flue duct,the boiler ex-haust temperature becomes equilibrium and decreases on a whole.Finally,the boiler exhaust tem-perature can be reduced and the boiler efficiency and unit heat efficiency can be enhanced.

关 键 词：空气预热器 排烟温度 非平衡换热器 供电煤耗 热效率 

分 类 号：TK223.34[动力工程及工程热物理—动力机械及工程]