超临界直流锅炉变压运行下水冷壁中间分配集箱的流量分配特性  

Flow Distribution Characteristics of Intermediate Headers of a Supercritical Once-through Boiler's Water Cooled Walls,Operating Under Variable Pressure Conditions

作　　者：朱玉琴[1] 李迓红[1] 毕勤成[2] 陈听宽[2] 

机构地区：[1]西安石油大学石油炼化工程技术研究中心,西安710065 [2]西安交通大学动力工程多相流国家重点试验室,西安710049

出　　处：《动力工程》2007年第5期663-666,共4页Power Engineering

基　　金：国家自然科学基金资助项目(50323001)

摘　　要：研究了国产600 MW直流锅炉水冷壁中间分配集箱在亚临界压力下的流量分配特性。试验参数为：压力p=12-21 MPa,质量流速G=400-1200 kg/（m^2·s）,质量含汽率x=0-1.0。试验结果表明：随着分配集箱工作压力和分配集箱进口质量流速的增加,分配集箱并联支管之间流量分配的偏差降低;在入口质量含汽率较小时,并联支管间的流量分配偏差随着质量含汽率的增加而增大;在入口质量含汽率大于0.6时,并联支管间的流量分配偏差随着入口质量含汽率的增加而减小。Flow distribution characteristics, of intermediate distribution headers between water walls, under sub-critical pressure conditions, of a domestic manufactured 600MW once-through boiler, has been studied. The effect of the medium＇s pressure on flow distribution characteristics, in the vertical water wall tubes connected with the header, was studied under the following conditions： pressure p = 12 - 21 MPa, mass flow G = 400 - 1 200 kg/m^2 ·s, steam content x = 0 - 1.0. Results show that the non-uniformity, of flow distribution among the parallel connected branch pipes, reduces with the header＇s increasing pressure and the inlet mass flow. In case the inlet mass flow contains little steam, then flow distribution non-uniformity in the branch pipes increases with increasing steam content; but as soon as the inlet steam mass content exceeds 0.6, non-uniformity of flow distribution decreases with increasing steam content at inlet.

关 键 词：能源与动力工程 直流锅炉 超临界压力 流量分配 垂直水冷壁管 

分 类 号：TK229.54[动力工程及工程热物理—动力机械及工程]