超临界直流锅炉水冷壁压降及出口汽温计算  

Calculation of Pressure Drop and Outlet Steam Temperature of Water Wall Pipes for Supercritical Once-Through Boiler

作　　者：卢欢[1] 杨冬[1] 周旭[1] 徐良洪[2] 边宝[2] 邵国桢[2] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049 [2]上海锅炉厂有限公司,上海200245

出　　处：《西安交通大学学报》2011年第1期38-42,共5页Journal of Xi'an Jiaotong University

基　　金："十一五"国家科技支撑计划资助项目(2006BAA03B02-03)

摘　　要：针对超临界直流锅炉水冷壁结构特点及炉内热负荷分布特点,将水冷壁划分为由流量回路、压力节点和连接管组成的流动网络系统.根据质量守恒、动量守恒和能量守恒方程,建立了超临界直流锅炉水冷壁压降和出口汽温的数学计算模型.在此基础上,对利港发电厂600MW超临界螺旋管圈直流锅炉在不同负荷时上升系统总压降及上、下炉膛水冷壁出口汽温进行了计算,并与实炉数据进行了比较,表明100%负荷(锅炉最大连续蒸发量)、75%负荷及50%负荷时,上、下炉膛水冷壁出口汽温误差均不超过2%;75%负荷时上升系统总压降相差0.058MPa,误差为2.87%.由此表明所建立的600MW超临界螺旋管圈直流锅炉水动力计算模型和所开发的程序是正确可靠的,完全可用于实际工程计算,为超临界锅炉设计提供了参考.The water wall system can be equivalent to a network consisting of circuits, pressure grids, and connecting pipes. A mathematical model for calculating pressure drop and outlet steam temperature of a supercritical once-through boiler was established on the basis of the mass conservation, momentum conservation and energy conservation equations. Moreover, the pressure drop in the up-system and the outlet steam temperature of a 600 MW supercritical once-through boiler with spiral tube coils at Ligang Power Plant were calculated under different loads, and compared with field test data. The results show that the errors of outlet steam temperature of the water wall pipes for the upper-furnace and lower-furnace were all less than 2 % under 100 % load （boiler maximum continuous rating, BMCR）, 75% load and 50% load; the error of the pressure drop under 75% load for the up-system was 2.87%. It shows that the present hydrodynamic calculation model and the program developed for the 600 MW supercritical once-through boiler are accurate and reliable.

关 键 词：超临界直流锅炉 螺旋管圈 压降 出口汽温 

分 类 号：TK223.3[动力工程及工程热物理—动力机械及工程]