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过程工程学报 ›› 2017, Vol. 17 ›› Issue (4): 689-696.DOI: 10.12034/j.issn.1009-606X.216238

• 流动与传递 • 上一篇    下一篇

气液逆流洗涤器内两相流场的实验研究与数值模拟

李 萌2, 李 智1, 秦 迪1, 范怡平1* 卢春喜1   

  1. 1.中国石油大学(北京)重质油国家重点实验室,北京 102249;2. 中石化洛阳工程有限公司,河南 洛阳 471003
  • 收稿日期:2016-07-06 修回日期:2017-01-05 出版日期:2017-08-20 发布日期:2017-08-16
  • 通讯作者: 范怡平

Experimental Research and Numerical Simulation of Flow Field in a Gas?Liquid Countercurr Scrubber

Meng LI2,  Zhi LI1,  Di QIN1,  Yiping FAN1*,  Chunxi LU1   

  1. 1. State Key Laboratory of Heavy Oil, China University of Petroleum, Beijing 102249, China;
    2. SINOPEC Louyang Petrochemical Engineering Corporation, Luoyang, Henan 471003, China
  • Received:2016-07-06 Revised:2017-01-05 Online:2017-08-20 Published:2017-08-16
  • Contact: FAN Yi-ping

摘要: 采用RNG k?ε湍流模型和欧拉双流体多相流模型模拟了气液逆流接触洗涤器内的两相流场,将计算结果用实验验证.通过考察两相流速、湍流强度、压降、气含率等参数验证了模型的可靠性,对不同喷嘴结构和操作条件下的泡沫区流场特性进行了模拟分析. 结果表明,气液撞击形成泡沫区的湍流强度高,气液两相径向与切向速度较大,轴向速度较小,可用湍流强度大小表征泡沫区的大小. 泡沫区占整个洗涤器的体积分数??随气液质量流量比增大先增大后减小,气液质量流量比为0.0096时达峰值;随进液轴/切流量比增大?先增大后减小,流量比为0.66时达峰值. 喷口直径为8 mm、切向进液倾斜角为60°时气液传质效果最好.

关键词: 洗涤喷嘴, 数值模拟, 湍流强度

Abstract: By using RNG k?ε turbulence model and Euler two-fluid multiphase model, simulation of countercurrent-crossflow gas?liquid imping scrubber was presented and the computed results were validated via experiments. The models’ reliability was confirmed by analyzing the parameters, including the velocities of the two phases, the turbulence intensity, the pressure drop and the local gas hold-up distribution. The flow field characteristics in foam area with diffierent nozzle structures and operating conditions were simulated. The results showed that the turbulence intensity in the foam area formed by collision of gas and liquid was quite high, the tangential and radial velocities of the two phases was high and the axial velocity was low. The foam area could be represented by the turbulence intensity. The volume fraction of the effective mass transfer area in the total flow field increased firstly and then decreased with the increasing of gas and liquid mass flow ratio, peaks around 0.0096. The effective mass transfer area firstly increased and then decreased with the increasing of the axial and tangential liquid mass flow ratio, and peaks around 0.66. When the diameter of the nozzle was 8 mm and tangential angle into the liquid was 60°, gas?liquid mass transfer reached the best.

Key words: scrubber nozzle, numerical simulation, turbulent intensity