应用于循环流化床锅炉气固流动和燃烧的CPFD数值模拟  

Application of CPFD Approach on Gas-solid Flow and Combustion in Industrial CFB Boilers

作　　者：张瑞卿[1] 杨海瑞[1] 吕俊复[1] 

机构地区：[1]清华大学热科学与动力工程教育部重点实验室,北京市海淀区100084

出　　处：《中国电机工程学报》2013年第23期75-83,6,共9页Proceedings of the CSEE

基　　金："十二五"国家科技支撑计划项目(2012BAA02B01);白马电厂科技项目(BMCFB60KY10-146)~~

摘　　要：利用计算颗粒流体力学(CPFD)商业软件BarracudaTM对工业循环流化床锅炉中的气固流动和燃烧过程进行了数值模拟,通过模拟得到了炉膛从启动到稳定运行的动态变化过程。在气固流动方面,结果体现了循环流化床锅炉中炉内颗粒的整体流动形态和特性,并准确预测出磨损的发生位置;在燃烧方面,计算结果证明采用简化的煤燃烧机制是合理有效的,得到的炉膛温度分布和气体成分分布均与实际测试情况吻合。验证了利用CPFD手段预测循环流化床中气固流动和燃烧过程的潜力和可行性。This paper performed a systematic simulation research on gas-solid flow and coal combustion in an industrial circulating fluidized bed（CFB） boiler using a commercial CPFD package BarracudaTM.Then,dynamic process including qualitative fluidization patterns and quantitative data in the furnace from start-up to stabilization was obtained.General and some unique characteristics of CFB gas-solid flow was well captured while detailed wear-intensive location in furnace was identified.The calculation results prove that application of a simplified combustion mechanism is efficient,and furnace temperature profile and gas concentration distribution are consistent with actual measurement data.This research presents a potential feasibility of applying the CPFD simulation approach to predict multiphase flow and combustion in industrial scale CFBs.

关 键 词：循环流化床锅炉 数值模拟 气固两相流 煤燃烧 

分 类 号：TK224[动力工程及工程热物理—动力机械及工程]