化工学报 ›› 2018, Vol. 69 ›› Issue (2): 642-649.DOI: 10.11949/j.issn.0438-1157.20170655

• 流体力学与传递现象 • 上一篇    下一篇

新型气液逆流接触洗涤器流动-传质模型

满长卓1, 范怡平1, 范瀚文2   

  1. 1 中国石油大学(北京)重质油国家重点实验室, 北京 102249;
    2 西安交通大学能源与动力工程学院, 陕西 西安 710049
  • 收稿日期:2017-05-19 修回日期:2017-10-10 出版日期:2018-02-05 发布日期:2018-02-05
  • 通讯作者: 范怡平
  • 基金资助:

    国家自然科学基金项目(21476254)。

Flow and mass-transfer model of new countercurrent gas-liquid scrubber

MAN Changzhuo1, FAN Yiping1, FAN Hanwen2   

  1. 1 State Key Laboratory of Heavy Oil, China University of Petroleum, Beijing 102249, China;
    2 College of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China
  • Received:2017-05-19 Revised:2017-10-10 Online:2018-02-05 Published:2018-02-05
  • Supported by:

    supported by the National Natural Science Foundation of China (21476254).

摘要:

通过冷模实验对一种新型气液逆流式洗涤器流动传质特性进行了考察。实验结果表明,在不同的操作条件下,洗涤器内气液两相流动会呈现出不同的流型。其中,洗涤器在泡沫流状态下的高效传质段体积和解吸率的数值均较大。将实验结果与理论分析相结合,依据其气液接触表面更新极快、形成高度湍动泡沫流的特点,提出了一种基于该洗涤器结构和操作特性、可以预测洗涤器传质效果的“两段式”流动-传质模型。模型将洗涤器内气液作用区分为两个区段:旋转射流段和高效传质段。利用该模型分析了解吸率与液气比L/G和旋流比ω的变化关系;结果表明,在不同操作条件下,该模型的计算结果与实验数据吻合较好,可供工程设计参考。

关键词: 气液两相流, 洗涤器, 传质, 解吸率, 表面更新

Abstract:

The flow-mass transfer characteristics of a new countercurrent gas-liquid scrubber were investigated through cold model experiment. The results indicated that different gas-liquid flow patterns in the scrubber could be obtained under different operating conditions. Both the volume of the highly efficient mass-transfer and the desorption rate under the bubble flow presented the higher values comparing with those under other two flow patterns. Combining the experimental results with theoretical analysis, a two-zone flow-mass transfer model which can estimate the mass-transfer of the scrubber was established based on its characteristics of rapid renewal on gas-liquid surface and highly turbulent bubble flow. The structural/operating features of the scrubber were also considered. The proposed model divided the whole gas-liquid impinging area into two zones, including the rotating jet-flow zone and the high-efficiency mass-transfer zone. Then the relationships of desorption rate to L/G as well as ω were discussed by using the model. The computed results by this model match well with the experimental under different operating conditions and it can be used for engineering design purpose.

Key words: gas-liquid flow, scrubber, mass transfer, desorption rate, surface renewal

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