超临界“W”火焰锅炉水冷壁的优化设计  

Optimized design of water wall in supercritical boiler with W-shaped flame

作　　者：樊泉桂[1] 阎书耕[2] 

机构地区：[1]华北电力大学,河北保定071003 [2]华能上安电厂,河北井陉050310

出　　处：《中国电力》2010年第8期13-17,共5页Electric Power

摘　　要：阐述了超临界"W"火焰锅炉水冷壁的优化设计。针对超临界锅炉垂直管屏水冷壁运行中出现的热偏差较大和必须降低流动阻力的要求,以及"W"火焰锅炉由于炉型结构和水冷壁系统复杂,不便于采用螺旋管圈和炉内热负荷分布复杂的问题,根据实际运行数据、试验数据以及计算数据,论证了提高超临界"W"火焰锅炉性能的主要技术措施。包括:改进现有"W"火焰炉型结构,提高"W"火焰炉型对超临界压力下工质热物性的适应性能,避免现有2种炉型运行缺陷的叠加,掌握热负荷分布变化和水冷壁流量分配的一致性关系,控制水冷壁出口的温度和温度偏差,改进正流量补偿特性对水冷壁工质温度偏差的抑制作用的有限性,采用优化内螺纹管垂直管屏水冷壁和低质量流速等。The optimized design of water wall in supercritical boiler with W-shaped flame was expatiated. In view of the requirements of the higher thermal deviation ,the necessary of reducing the flow resistance and the problems of being inconvenient to adapt the spiral tube ring and the complexity of the distribution of the heat load in the vertically-upward wall operation because of the structure of the boiler and the complexity of the water wall system, and based on the actual operation data, the experiment data as well as the computation data, the major measures of the supercritical boiler with W-shaped flame were proved, which include improving the furnace structure, enhancing of adaptability of the working medium thermodynamic properties at the supercritical pressure, avoiding the composition of the shortcomings of the existing two kinds of boiler, gaining the compatibility relationship between the change of the heat load and the distribution of the fluid capacity, controlling the temperature and temperature deviation of the outlet of the water wall, the finiteness of the inhibition effect of the flow compensation feature to the deviation of the fluid temperature and optimizing internally-ribbed tubes in the vertical platen water wall and the low mass flow speed.

关 键 词：超临界锅炉 "W"火焰 水冷壁 优化设计 温度偏差 流量补偿 

分 类 号：TK223.31[动力工程及工程热物理—动力机械及工程]