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中国科学院大学学报 ›› 2016, Vol. 33 ›› Issue (2): 218-222.DOI: 10.7523/j.issn.2095-6134.2016.02.011

• 中国工程热物理学会2014年多相流年会专栏 • 上一篇    下一篇

大型循环流化床环形炉膛中气固流动特性的CPFD数值模拟

邱桂芝1,2, 叶佳敏1, 王海刚1, 王小芳1, 王法军1,2, 孙运凯1, 聂立3   

  1. 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
  • 收稿日期:2015-03-13 修回日期:2015-07-07 发布日期:2016-03-15
  • 通讯作者: 王海刚
  • 基金资助:

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

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

QIU Guizhi1,2, YE Jiamin1, WANG Haigang1, WANG Xiaofang1, WANG Fajun1,2, SUN Yunkai1, NIE Li3   

  1. 1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Dongfang Boiler Group Co. LTD, Zigong 643000, Sichuan, China
  • Received:2015-03-13 Revised:2015-07-07 Published:2016-03-15

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.

关键词: 大型循环流化床, 环形炉膛, 气固流动, CPFD数值模拟

Abstract:

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.

Key words: large scale circulating fluidized bed, annular combustion chamber, gas-solids flow, CPFD simulation

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