循环流化床锅炉气固流动特性的CPFD数值模拟  

CPFD simulation of gas-solid flow in circulating fluidized bed boilers

作　　者：史丹君 卢玫[1] 唐昭帆 SHI Dan-jun;LU Mei;TANG Zhao-fan(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《能源工程》2018年第2期65-71,共7页Energy Engineering

摘　　要：CPFD数值计算方法可有效解决三维空间内连续流体和大量颗粒的耦合计算问题,利用该方法模拟研究了某热电厂循环流化床锅炉炉膛内的气固流动特性,采用Wen Yu-Ergun模型,得到炉膛的压力轴向分布与实际测试结果吻合;在此基础上分析颗粒的粒径、浓度和速度沿轴向和径向的分布规律,得到了炉内颗粒的流态化流动形态和动力学特性。模拟结果可为以后的锅炉运行提供实际指导经验。CPFD numerical computation method can effectively solve the calculation problem of coupling continuous fluid and a large number of particles in three dimensional spaces.The gas-solids flow characteristics of the running circulating fluidized bed boiler furnace in a thermal power plant were investigated based on this simulation method.The result showed that the pressure axial distribution of the furnace predicted by using the WenYu-Ergun model was in good agreement with the actual test result.The distribution regularity of particle size,concentration and velocity along the axial and radial directions were analyzed.The results showed the fluidization morphology and kinetics characteristics of particles in the furnace.The simulation results had good engineering application background and practical significance,which could provide practical guidance experience for boiler operation in the future.

关 键 词：循环流化床 气固流动 CPFD数值模拟 

分 类 号：TK224.1[动力工程及工程热物理—动力机械及工程]