Study on the effects of structural parameters of bubble-cap distributor with Venturi downcomer on the liquid distribution performance

MO Hanyang; YONG Yumei; ZHANG Guangji; YU Kang; CHEN Wenqiang; YANG Chao

doi:10.11949/0438-1157.20210871

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Study on the effects of structural parameters of bubble-cap distributor with Venturi downcomer on the liquid distribution performance

Fluid dynamics and transport phenomena | 更新时间：2026-07-24

- Study on the effects of structural parameters of bubble-cap distributor with Venturi downcomer on the liquid distribution performance
- CIESC Journal Vol. 72, Issue 12, Pages: 6241-6253(2021)
- 作者机构：
  
  1.中国矿业大学（北京）化学与环境工程学院，北京 100083
  2.中国科学院过程工程研究所，北京 100190
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20210871
  CLC： TQ 028.8
- Received：28 June 2021，
  
  Revised：2021-08-30，
  
  Online First：22 December 2021，
  
  Published：05 December 2021
- 稿件说明：
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莫晗旸, 雍玉梅, 张广积, 于康, 陈文强, 杨超. 文丘里卷吸型气液分配器液体分配性能的结构参数研究[J]. 化工学报, 2021, 72(12): 6241-6253

MO Hanyang, YONG Yumei, ZHANG Guangji, YU Kang, CHEN Wenqiang, YANG Chao. Study on the effects of structural parameters of bubble-cap distributor with Venturi downcomer on the liquid distribution performance[J]. CIESC Journal, 2021, 72(12): 6241-6253
莫晗旸, 雍玉梅, 张广积, 于康, 陈文强, 杨超. 文丘里卷吸型气液分配器液体分配性能的结构参数研究[J]. 化工学报, 2021, 72(12): 6241-6253 DOI： 10.11949/0438-1157.20210871.

MO Hanyang, YONG Yumei, ZHANG Guangji, YU Kang, CHEN Wenqiang, YANG Chao. Study on the effects of structural parameters of bubble-cap distributor with Venturi downcomer on the liquid distribution performance[J]. CIESC Journal, 2021, 72(12): 6241-6253 DOI： 10.11949/0438-1157.20210871.

摘要

为了改善滴流床用的内卷吸型气液分配器的液体分散差的现象，提出了一种文丘里卷吸型气液分配器，并对其结构参数进行了参数化研究，定量认识卷吸型分配器的结构参数对其气液分配性能的影响。在冷态实验装置上进行了文丘里卷吸型气液分配器性能实验，建立了耦合群体平衡模型的欧拉-欧拉两相流模型，数值模拟了文丘里卷吸型气液分配器气液两相分配流动过程。冷模实验结合数值模拟，系统性考察了各结构参数对卷吸型气液分配器的液体分布均匀性、喷淋半径以及压降的影响。结果表明，采用具备缩-扩结构的文丘里管作为降液管能够有效提升卷吸型分配器的分布均匀度和喷淋半径，并显著降低压降。通过正交试验，获得了主要结构参数与分配性能的相关性，给出了结构参数与性能指标的经验关联式。降液管的扩张段是改善液体分配性能的关键结构，其扩张角为30°时液体分配性能最好。

Abstract

In order to improve the liquid center aggregation of bubble-cap typed gas-liquid distributor in trickle bed reactor and investigate the relationship between structural parameters and performance of liquid distribution

a new gas-liquid distributor with the Venturi downcomer was designed while the effect of its structure parameters on the distribution quality was explored. A cold experimental bench was established

and the performance of the new gas-liquid distributor was verified. Euler-Euler-PBE mathematical model was built up and validated to simulate the gas-liquid flow in the new gas-liquid distributor. Combining the experimental and numerical data

the effect of the structure parameters on pressure drop

liquid distribution

and spray area was analyzed systematically. The results show that the use of a Venturi with a shrink-and-expansion structure as a downcomer can effectively improve the distribution uniformity and spray radius of the entrainment type distributor

and significantly reduce the pressure drop. Based on the orthogonal cases numerically

the significance of main structure parameters was clarified

and empirical correlations of the distribution performance with structural parameters were obtained. The expansion section of the downcomer is a key structure to improve the liquid distribution performance

and the liquid distribution performance is the best when the expansion angle is 30°.

关键词

Keywords

references

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