Evaluation on heat transfer performance of horizontal liquid-solid circulating fluidized bed heat exchanger

doi:10.16085/j.issn.1000-6613.2016.11.005

Chemical Industry and Engineering Progress ›› 2016, Vol. 35 ›› Issue (11): 3421-3425.DOI: 10.16085/j.issn.1000-6613.2016.11.005

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Evaluation on heat transfer performance of horizontal liquid-solid circulating fluidized bed heat exchanger

LIU Yan^1,2, ZHANG Yingdi¹, PEI Chenglin¹, WANG Zhi¹, ZHANG Wei²

1. Department of Chemical Engineering, Hebei University of Technology, Tianjin 300130, China;
2. School of Marine Science and Engineering, Hebei University of Technology, Tianjin 300130, China

Received:2016-03-18 Revised:2016-08-02 Online:2016-11-05 Published:2016-11-05

水平液固循环流化床换热器传热性能评价

刘燕^1,2, 张英迪¹, 裴程林¹, 王智¹, 张伟²

1. 河北工业大学化工学院, 天津 300130;
2. 河北工业大学海洋科学与工程学院, 天津 300130

通讯作者: 刘燕(1970-),女,副教授,研究方向为化工过程多相流。E-mail:Julia_liuyan@hebut.edu.cn。
作者简介:刘燕(1970-),女,副教授,研究方向为化工过程多相流。E-mail:Julia_liuyan@hebut.edu.cn。
基金资助:
河北省科技支撑计划（14273105D）及河北省自然科学基金（D2014202074）项目。

Abstract

Abstract: The horizontal liquid-solid circulating fluidized bed heat exchanger with Kenics static mixer was studied by this experiment. The effects of Kenics static mixer twist rate, the installation method of Kenics static mixer, flow rate and particle volume fraction on heat transfer performance and flow resistance performance were investigated, which were analyzed by the comprehensive heat transfer performance evaluation criteria index. It was found that the heat transfer and resistance coefficient decrease with the increase of twist rate. Results showed that the performance evaluation criteria of Kenics static mixer with twist rate Y=1.5, 2, 2.5, 3.5 were over 1 without exception in the range of Reynolds number 10000—45000, which indicates that the horizontal fluidized bed heat exchanger with Kenics static mixer can enhance heat transfer. The performance evaluation criteria of horizontal fluidized bed heat exchanger reached 1.18 at most, when the Reynolds number reached about 25000, the twist rate of Kenics static mixer is Y=2.5 and the particle volume fraction is 4%. The performance evaluation criteria of horizontal fluidized bed heat exchanger is the highest on the condition that the distance between two Kenics static mixers with twist rate Y=2.5 is 200mm.

Key words: Kenics static mixer, horizontal liquid-solid circulating fluidized bed, multiphase flow, heat transfer enhancement, performance evaluation criteria(PEC)

摘要： 对管内插入Kenics静态混合器的水平液固循环流化床换热器进行实验研究，实验考察了静态混合器扭率、静态混合器安装方式、液体流速、颗粒体积分数对传热性能和流阻性能的影响，并运用综合强化传热性能评价指标（PEC）对其进行分析。实验发现，传热性能和阻力系数均随扭率增加而减小。当雷诺数在10000~45000之间时，扭率为1.5、2、2.5、3.5的Kenics静态混合器的PEC指标均大于1，说明了水平流化床换热器插入Kenics静态混合器能够改善传热。在雷诺数达到25000左右、Kenics静态混合器扭率为2.5、颗粒体积分数为4%时，水平流化床换热器的PEC指标最高达到1.18。当两个扭率均为2.5的Kenics静态混合器安装间距为200mm时，水平流化床换热器的PEC指标最高。

关键词: Kenics静态混合器, 水平液固循环流化床, 多相流, 强化传热, 性能评价指标

CLC Number:

TQ51

LIU Yan, ZHANG Yingdi, PEI Chenglin, WANG Zhi, ZHANG Wei. Evaluation on heat transfer performance of horizontal liquid-solid circulating fluidized bed heat exchanger[J]. Chemical Industry and Engineering Progress, 2016, 35(11): 3421-3425.

刘燕, 张英迪, 裴程林, 王智, 张伟. 水平液固循环流化床换热器传热性能评价[J]. 化工进展, 2016, 35(11): 3421-3425.

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Evaluation on heat transfer performance of horizontal liquid-solid circulating fluidized bed heat exchanger

水平液固循环流化床换热器传热性能评价

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