基于CPFD方法的660MW超临界CFB锅炉循环回路均匀性研究  

Study on the Uniformity of Circulating Loop in a 660MW Supercritical CFB Boiler Based on CPFD Method

作　　者：陈鸿伟[1,2,3] 黑成浩 王俊武 宋杨凡 赵俊骅 贾建东 王稀光 CHEN Hong-wei;HEI Cheng-hao;WANG Jun-wu;SONG Yang-fan;ZHAO Jun-hua;JIA Jian-dong;WANG Xi-guang(Department of Power Engineering,North China Electric Power University,Baoding 071003,Hebei Province,China;Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology,North China Electric Power University,Baoding 071003,Hebei Province,China;Baoding Key Laboratory of Low Carbon and High Efficiency Power Generation Technology,North China Electric Power University,Baoding 071003,Hebei Province,China;Sujin Shuozhou Coal Gangue Power Generation Co.,Ltd.,Shuozhou 036006,Shanxi Province,China;Baoding Institute of Architecture Design Co.,Ltd.,Baoding 071000,Hebei Province,China)

机构地区：[1]华北电力大学动力工程系,河北保定071003 [2]华北电力大学河北省低碳高效发电技术重点实验室,河北保定071003 [3]华北电力大学保定市低碳高效发电技术重点实验室,河北保定071003 [4]苏晋朔州煤矸石发电有限公司,山西朔州036006 [5]保定市建筑设计院有限公司,河北保定071000

出　　处：《动力工程学报》2023年第1期24-33,共10页Journal of Chinese Society of Power Engineering

基　　金：河北省自然科学基金资助项目(E2020502053);国家自然科学基金资助项目(52106199);北京市自然科学基金资助项目(3214056);中央高校基本科研业务费专项资金资助项目(2020MS102)。

摘　　要：采用计算颗粒流体力学(CPFD)方法对某660 MW超临界循环流化床锅炉的炉膛、分离器和下部料腿进行了模拟,分析了锅炉负荷、分离器出口压力、一二次风配风和非均匀二次风对各回路固体流率的影响。结果表明:在稳定性分析中,压力模拟值与锅炉运行数据的平均偏差为9.6%,循环回路固体流率平均值与设计物料流量的平均相对偏差为9.49%;中间循环回路固体流率较高,回料口与中间分离器的非对应布置对左、右半炉的总固体流率影响不大;较高的分离器出口压力对不同回路固体流率的分布影响较大,当出口压力较低时,其影响减少;均匀性最好的配风比为50∶50,在此条件下,分离器固体流率的相对极差为5.97%;当炉膛中部的二次风量减少至24%时,相对极差减小到8.45%。The computational particle-fluid dynamics(CPFD)method was used to simulate the furnace,cyclone separators and lower diplegs of a 660 MW supercritical circulating fluidized bed(CFB)boiler,and the effects of the boiler load,cyclone separator outlet pressure,primary and secondary air distributions,and non-uniform secondary air on the solid flow rate of each circulating loop were analyzed.Results show that the average deviation between the simulated pressure values and the boiler operation data is 9.6%in the stability analysis,and the average relative deviation between the average solid flow rate of the circulating loops and the designed material flow is 9.49%.The solid flow rate of the intermediate circulating loop is higher,and the non-corresponding arrangement of the return inlets and the cyclone separators has little influence on the total solid flow rate of the left and right half boilers.The higher outlet pressure of the cyclone separator has a greater effect on the distribution of the solid flow rate in different circulating loops,but the effect becomes smaller when the outlet pressure is lower.The relative range of the solid flow rate of the cyclone separator under the air distribution ratio of 50∶50 with the best uniformity is 5.97%.When the air volume fraction of the secondary air in the middle of the furnace is reduced to 24%,the relative range will be reduced to 8.45%.

关 键 词：超临界循环流化床锅炉 循环回路 固体流率 CPFD模拟 

分 类 号：TK227[动力工程及工程热物理—动力机械及工程]