大型循环流化床环形炉膛中气固流动特性的CPFD数值模拟  

CPFD simulation of gas-solids flow in annular combustion chamber of large-scale circulating fluidized bed

作　　者：邱桂芝 叶佳敏[1] 王海刚[1] 王小芳[1] 王法军[1,2] 孙运凯[1] 聂立 

机构地区：[1]中国科学院工程热物理研究所,北京100190 [2]中国科学院大学,北京100049 [3]东方锅炉股份有限公司,四川自贡643000

出　　处：《中国科学院大学学报（中英文）》2016年第2期218-222,共5页Journal of University of Chinese Academy of Sciences

基　　金：国家自然科学基金(61320106004;61374018);中国科学院战略性先导科技专项(A类)(XDA07030100)资助

摘　　要：环形炉膛理论上可有效解决大型循环流化床中二次风穿透不足的问题,其内外环壁面的设计也为更多的受热面提供了充足的空间,是一个具有明显优势的新型炉膛结构.本文使用CPFD数值模拟方法,对循环流化床环形炉膛冷态实验台内气固流动特性进行研究.模拟得到的炉内轴向压力分布和返料流率均与实验结果吻合较好.在此基础上分析炉内气固流动特性以及炉膛出口气固流动不均匀性,研究结果为环形炉膛的设计优化提供有价值的信息.Annular combustion chamber was designed for large-scale circulating fluidized bed （CFB） to improve the secondary air penetration and increase the enclosing heat transfer surface. In this study, the gas-solids flow in a large-scale CFB with annular combustion chamber is investigated based on CPFD simulation. The results show that the pressure distribution and solids flux predicted by the numerical simulation are in good agreement with experimental results. The gas-solids flow behavior and non-uniformity characteristics of gas and solids mass fluxes at combustion chamber outlets are analyzed. The results can be used as valuable information for the optimum design of annular combustion chamber.

关 键 词：大型循环流化床 环形炉膛 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]