卧式循环流化床锅炉燃烧的数值模拟  

Numerical investigation of the flow and combustion in a horizontal circulating fluidized bed boiler

作　　者：李清海[1] 周晓彬[1,2] 陈庚[2] 蒙爱红[1] 张衍国[1] 

机构地区：[1]清华大学热能工程系,热科学与动力工程教育部重点实验室,二氧化碳资源化利用与减排技术北京市重点实验室,北京100084 [2]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《清华大学学报（自然科学版）》2013年第3期353-357,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家“九七三”重点基础研究发展计划(2011CB201502);国家科技支撑计划(2010BAC66B03)

摘　　要：以清华大学专利技术"卧式循环流化床锅炉"为研究对象,用数值模拟的方法计算了炉内的流动和燃烧。以RNG k-ε模型模拟炉内湍流流动,用气固阻力分析模型描述气固两相相互作用,用单收缩核模型模拟炉内燃烧反应,并将数值计算结果与试验数据进行了比较,验证了所用模型的适用性及兼容性。数值模拟结果表明:1.5∶1的一二次风比率较适宜锅炉运行,床温的变化滞后于给料量的变化。该研究可以指导卧式循环流化床锅炉的设计和运行。The flow and combustion characteristics in a horizontal circulating fluidized bed （HCFB） boiler were investigated to improve the HCFB boiler performance. The numerical model used the RNG k-e model to describe the turbulent flow- with a gas solid drag model to describe the drag between the gas and solid phases. A single particle shrinking core model was used to model the combustion in the furnace. The numerical results agree well with experimental data. The numerical results show that a primary to second air ratio of 1.5 ： 1 gives safer and more efficient boiler operation. The results also verify that the bed temperature lags behind the fuel injection. The numerical results will facilitate design and operation of HCFB boilers.

关 键 词：卧式循环流化床 数值模拟 燃烧 

分 类 号：TK222[动力工程及工程热物理—动力机械及工程]