循环流化床锅炉外置床传热系数的测定和关联  

Measurment and empirical correlation of heat transfer coefficient in external heat exchanger of a CFB boiler

作　　者：孙献斌[1] 时正海[1] 金森旺[1] 刘海峰[1] 赵鹏博[1] 李力[1] 

机构地区：[1]中国华能集团清洁能源技术研究院有限公司,北京100098

出　　处：《热力发电》2014年第1期115-117,共3页Thermal Power Generation

基　　金：国家"十二五"科技支撑计划课题"CFB锅炉燃用难燃煤种的研究"(2012BAA02B02)资助

摘　　要：外置床传热系数是设计大型循环流化床(CFB)锅炉受热面的关键参数。为了测定CFB锅炉外置床的传热系数,在1台热功率4MW的CFB试验台上,对外置床的传热系数进行了试验和测定,研究了外置床床温、流化速度对传热特性的影响规律。通过对试验数据的回归,得到了外置床传热系数的关联式,其计算和试验误差的绝对值小于14%,表明该关联式准确度较高,可用于CFB锅炉外置床的设计计算。The heat transfer coefficient of external heat exchanger is key parameters for designing large-capacity circulating fluidized bed （CFB）boiler. In order to measure heat transfer coefficient in external heat exchanger of the CFB boiler, the measurement of heat transfer coefficient in the external heat exchanger was performed on a hot test facility with heating power of 4 MW. The effect of bed temperature and fluidized velocity on heat transfer characteristics was investigated. Through regression analysis on the test data,the correlation formula of heat transfer coefficient in external heat exchanger was obtained. The error between the heat transfer coefficient^s calculated value and measured value was less than 14% ,indicating the correlation equation has high calcula- tion accuracy and can be applied in design calculation for CFB boilers.

关 键 词：CFB锅炉 外置床 传热系数 关联式 

分 类 号：TK229[动力工程及工程热物理—动力机械及工程]