Effect of ring baffle configuration in a self-priming venturi scrubber using CFD simulations--颗粒学报PARTICUOLOGY

Yang, S., Zhao, X., Sun, W., Yuan, J., & Wang, Z. (2019). Effect of ring baffle configuration in a self-priming venturi scrubber using CFD simulations. Particuology, 47, 63-69. https://doi.org/10.1016/j.partic.2019.02.003

Effect of ring baffle configuration in a self-priming venturi scrubber using CFD simulations

Shuai Yang ^*, Xiangdi Zhao, Wanfu Sun, Jiwu Yuan, Zheng Wang

State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering, Qingdao 266071, China

10.1016/j.partic.2019.02.003

Volume 47, December 2019, Pages 63-69

Received 12 November 2018, Revised 11 February 2019, Accepted 19 February 2019, Available online 29 June 2019, Version of Record 7 December 2019.

E-mail: yangs.qday@sinopec.com

Highlights

• The gas‒liquid flow hydrodynamics in a self-priming venturi scrubber was simulated.

• Effects of structure and configuration parameters of ring baffle on injection flow were explored.

• Based on the simulation results, the optimal structure and configuration parameters were provided.

Abstract

This study uses computational fluid dynamics to survey the gas‒liquid flow hydrodynamics of a self-priming venturi scrubber with and without ring baffles. Based on the simulation results, we explore how the structure and configuration parameters such as baffle height, opening-area ratio, and baffle thickness affect the injection flow rate and the homogeneity of the gas‒liquid mixture. In addition, we report the best structure and configuration parameters for the ring baffle. The best position for the ring baffle is at nearly 7/16 of the length of the diffuser above the throat. Having the baffle too near the throat causes large pressure loss, decreasing the injection flow rate. The decrease in opening-area ratio leads to a lower injection flow rate and a more homogeneous gas‒liquid mixture. The optimal value depends on the requirement of the injection flow rate. For the baffle thickness, 5 mm is recommended; an overly thick baffle decreases the homogeneity of the gas‒liquid mixture near the throat. All structure parameters and configuration parameters must satisfy the requirement imposed by the injection flow rate and scrubbing efficiency.

Graphical abstract

Keywords

Self-priming mode; Venturi scrubber; Computational fluid dynamics; Injection flow rate; Mixing degree; Scrubbing efficiency

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