循环流化床锅炉中水冷壁的磨损原理及其预防  

The Mechanism of the Water Wall Erosion in a Circulating Fluidized Bed Boiler and its Improvement

作　　者：侯祥松[1] 张建胜[1] 王进伟[1] 蒋文斌[1] 邢兴[1] 

机构地区：[1]清华大学热能工程系热能动力工程与热科学教育部重点实验室,北京100084

出　　处：《锅炉技术》2007年第4期19-24,共6页Boiler Technology

基　　金：国家重点基础研究发展规划项目资助(G1999022204)

摘　　要：循环流化床锅炉水冷壁管的磨损是影响循环流化床锅炉运行的一个主要因素。总结了循环流化床锅炉中水冷壁管的磨损情况,根据其磨损机理分析了预防磨损的措施。磨损的根本原因是气固两相流场造成的,因此改善易磨损部位的流场可以减轻磨损。采用厚壁水冷壁管、降低流化速度,也可以有效防止磨损爆管。运行经验表明,这些措施能大大地改善磨损情况,延长水冷壁管的使用寿命。The water erosion is the most serious fact, which affects potentially the CFB boiler performance. The mechanism of the erosion was discussed and consequent preventing techniques were suggested. The authors believe that the water wall erosion is cause by the solid from the reasonless soild-gas flow. Thus the erosion can be avoided by the improving flow field in the same time, the higher thickness of the tube or lower fluidizing velocity are effective for anti-erosion. These ways are confirmed by the practices.

关 键 词：热能工程 循环流化床 水冷壁管 磨损 两相流 

分 类 号：TK223.23[动力工程及工程热物理—动力机械及工程]