LIU Ping, ZHOU Tao Institute of Nuclear Thermal Power and Standardization. STUDY ON THE HEAT TRANSFER PROCESS OF ASH AND SLAG IN SLAG COOLER OF LARGE-CAPACITY CFB BOILER[J]. Thermal power generation, 2011, 40(10): 13-16.
LIU Ping, ZHOU Tao Institute of Nuclear Thermal Power and Standardization. STUDY ON THE HEAT TRANSFER PROCESS OF ASH AND SLAG IN SLAG COOLER OF LARGE-CAPACITY CFB BOILER[J]. Thermal power generation, 2011, 40(10): 13-16.DOI:
循环流化床锅炉冷渣器灰渣传热过程研究
摘要
针对循环流化床锅炉滚筒冷渣器设计中灰渣的换热系数确定困难等问题
提出利用在计算流化床和浸没表面间的换热中运用乳化团数学模型对灰渣在冷渣器中的传热过程进行传热分析
并计算灰渣的换热系数
进而确定灰渣的各种换热方式所占的份额。计算表明
在灰渣换热过程中辐射换热占32%
导热与对流换热占68%。乳化团的换热量约为气泡辐射传热的7.7倍。
Abstract
Directing against the problems existing in design method of the drum type slag cooler
e.i.the heat exchange coefficient of ash and slag is difficult to determine etc.
a method of using mathematical meodel of emulsified radical in calculation of heat exchange between the fluidized bed and the submerged surface has been put forward
and the heat transfer process of ash and slag in the slag cooler being analysed
and the heat exchange coefficient of ash and slag being calculated
and the share of various heat exchange mode being further determined.The results of calculation can be used as the basis of slag cooler design.