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机械消泡装置内流场特性分析

Analysis of Flow Field Characteristics in a Mechanical Defoaming Device.

作者信息

Li Shuai, Peng Tiefeng, Xu Shaomei, Qiu Youjie, Huai Yangyang

机构信息

Jiangxi Copper Technology Research Institute Co., Ltd., Nanchang, Jiangxi 330096, China.

出版信息

ACS Omega. 2024 Oct 9;9(42):42850-42857. doi: 10.1021/acsomega.4c04351. eCollection 2024 Oct 22.

DOI:10.1021/acsomega.4c04351
PMID:39464428
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11500149/
Abstract

To improve the froth breakdown performance of flotation foam, a mechanical defoaming device based on vacuum and rotation was developed. The device is mainly composed of a rotating disk and a baffle and generates negative pressure when rotating at high speed. Through the synergistic effects of negative pressure, collision, extrusion, and shearing, the flotation foam effectively separates the liquid and gas phases. The flow field characteristics of the defoaming device are meticulously analyzed through numerical simulation, leading to a comprehensive evaluation of its defoaming performance. The effects of different rotational speeds on fluid velocity, pressure, turbulence, and traces are studied. It can be obtained that when the rotational speed is 900-1800 rpm, the device generates a pressure zone of -2.5 to -12.5 kPa, which can meet the requirements of the defoaming design.

摘要

为提高浮选泡沫的破泡性能，研制了一种基于真空和旋转的机械消泡装置。该装置主要由转盘和挡板组成，高速旋转时产生负压。通过负压、碰撞、挤压和剪切的协同作用，浮选泡沫有效地实现了液相和气相的分离。通过数值模拟对消泡装置的流场特性进行了细致分析，从而对其消泡性能进行了全面评估。研究了不同转速对流体速度、压力、湍流和迹线的影响。结果表明，当转速为900-1800转/分钟时，该装置产生-2.5至-12.5千帕的压力区，能够满足消泡设计要求。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b609/11500149/007db6faa932/ao4c04351_0009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b609/11500149/990b3d013888/ao4c04351_0001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b609/11500149/cf1dda99ca0c/ao4c04351_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b609/11500149/372ee745d9b1/ao4c04351_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b609/11500149/96ee7083fc39/ao4c04351_0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b609/11500149/007db6faa932/ao4c04351_0009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b609/11500149/990b3d013888/ao4c04351_0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b609/11500149/c07fddbe1857/ao4c04351_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b609/11500149/1c2c8378484d/ao4c04351_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b609/11500149/d8ab5d38b992/ao4c04351_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b609/11500149/fe033c1b5a55/ao4c04351_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b609/11500149/cf1dda99ca0c/ao4c04351_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b609/11500149/372ee745d9b1/ao4c04351_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b609/11500149/96ee7083fc39/ao4c04351_0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b609/11500149/007db6faa932/ao4c04351_0009.jpg

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本文引用的文献

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A new wrinkle on liquid sheets: Turning the mechanism of viscous bubble collapse upside down.液膜新皱折：颠覆粘性气泡溃灭机理
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Drainage and Coalescence in Standing Foams.静置泡沫中的排水与聚并
J Colloid Interface Sci. 1997 Jul 1;191(1):184-201. doi: 10.1006/jcis.1997.4953.