600MW CFB锅炉气固流动均匀性数值模拟与试验研究  

Numerical Simulation and Experimental Investigation of Gas-solid Flow Uniformity in a 600MW CFB Boiler

作　　者：刘名硕 卢啸风[1] 王泉海[1] 徐杰[1] 严谨[1] 许臻 周嗣林 雷秀坚 刘昌旭[2] 谢雄[2] LIU Mingshuo;LU Xiaofeng;WANG Quanhai;XU Jie;YAN Jin;XU Zhen;ZHOU Silin;LEI Xiujian;LIU Changxu;XIE Xiong(Key Laboratory of Low Grade Energy Utilization Technology and System,(Chongqing University),Ministry of Education, Shapingba District,Chongqing 400030,China;Sichuan Baima Circulating Fluidized Bed Exampled Power Limited Liability Company,Neijiang 641005,Sichuan Province,China)

机构地区：[1]低品位能源利用技术及系统教育部重点实验室(重庆大学),重庆市沙坪坝区400030 [2]四川白马循环流化床示范电站有限责任公司,四川省内江市641005

出　　处：《中国电机工程学报》2019年第2期543-549,共7页Proceedings of the CSEE

基　　金：国家重点研发计划(2016YFB0600200)~~

摘　　要：在实炉试验测量数据的基础上,采用欧拉-拉格朗日模型模拟研究600MW超临界循环流化床锅炉在不同负荷、不同二次风分布状态下的气固流动分布规律。结果表明,二次风分布均匀性对炉内稀相区的颗粒浓度分布、悬吊屏表面的颗粒浓度分布、以及六个分离器的进口颗粒流率,都有较大影响。按实际CFB锅炉二次风分布参数完成的数值模拟结果,更接近于锅炉的运行情况。模拟结果还表明,二次风对密相区的扰动很大,特别有利于超大炉膛密相区的气固混合。将模拟结果与炉膛高度为60m的CFB冷模试验台的轴向颗粒浓度分布和部分热态试验测量结果进行对比,计算结果与试验测量结果基本吻合。This paper numerically investigated the gas-solid flow distribution in a 600 MW supercritical circulating fluidized bed boiler under different loads and different secondary air distributions. The Euler-Lagrange model was used in this simulation and corresponding results were compared with the test measurements. The results revealed that the distribution of secondary air strongly affected the solid concentrations in the dilute phase and suspended panels of furnace, as well as the entrance particle mass flux of six cyclones. The simulation results based on actual boiler secondary air distribution parameters would be closer to the operation of the CFB boiler. The simulation also indicated that secondary air had a great influence on the gas-solid mixing in dense phase of the supercritical CFB boiler. Compared with the axial particle concentration distribution of the 60-meter-high CFB riser and the partial thermal experimental data, the simulation results were provided with high accuracy.

关 键 词：超临界循环流化床(CFB)锅炉 气固流动 二次风 均匀性 数值模拟 

分 类 号：TK229[动力工程及工程热物理—动力机械及工程]