Research status of hydrocyclone and its application prospect in wastewater treatment of coal chemical industry

Yuanwei SUI  Guangru JIA  Gaojie XU  Qiang DONG  Pengge NING  Hongbin CAO

doi:10.12034/j.issn.1009-606X.218248

The Chinese Journal of Process Engineering >

2019 , Vol. 19 >Issue 2: 235 - 245

DOI: https://doi.org/10.12034/j.issn.1009-606X.218248

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Research status of hydrocyclone and its application prospect in wastewater treatment of coal chemical industry

Yuanwei SUI Guangru JIA Gaojie XU Qiang DONG Pengge NING Hongbin CAO

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1. Department of Biology and Environmental Engineering, Hefei University, Hefei, Anhui 230601, China 2. Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 3. Hebei Iron and Steel Group Hansteel Company, Handan, Hebei 056015, China

Received date: 2018-07-16

Revised date: 2018-09-11

Online published: 2019-04-18

Supported by

Projects (U1302274) supported by the National Science Foundation of China

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Abstract

The hydrocyclone is a kind of effective device for two-phase fluids separation using centrifugal force field. Although the hydrocyclone has a simple structure and small size, its separation efficiency is very high and it can be easily installed. Therefore, it is widely used in chemical, petroleum and underground mining industries. First, this work mainly introduces the working principle, theoretical research and application status of the hydrocyclone. The research development of hydrocyclone is discussed from the aspects of numerical simulation, structural parameters, operating parameters and physical parameters, as well as the progress of its application technology. And based on the characteristics: high emulsification, high dispersion and high viscosity of coal chemical wastewater water, the application prospect of hydrocyclone in coal chemical wastewater pretreatment is discussed. The combination of simulation and experiment of hydrocyclone has become the main research direction. The fluid condition of two-phase flow in hydrocyclone is deeply discussed, which provides theoretical basis for the improvement of the hydrocyclone structure, which is conducive to the rapid development of hydrocyclone and people's in depth understanding of it, and expands the application scope of hydrocyclone. We found that the research on structure improvement and operation parameters optimization of hydrocyclone are quite limited and the key to effective oil?water separation is the properties of the fluids. Therefore, it is very important to pretreat oily wastewater in the beginning. Demulsifier or flocculant, ultrasonic or microwave can be used to improve the physical properties of oily wastewater. For oily wastewater treatment, the detailed researches on the effects of oily wastewater?s physical properties and the application of numerical simulation will guide us to improve the separation efficiency of hydrocyclone in the future. It is certain that the hydrocyclone will have good economic benefits and wide application prospects in the deoiling and decoking process of coal-chemical wastewater.

Key words： hydrocyclone; oil-water separation; physical property parameters; numerical simulation

Cite this article

Yuanwei SUI Guangru JIA Gaojie XU Qiang DONG Pengge NING Hongbin CAO . Research status of hydrocyclone and its application prospect in wastewater treatment of coal chemical industry[J]. The Chinese Journal of Process Engineering, 2019 , 19(2) : 235 -245 . DOI: 10.12034/j.issn.1009-606X.218248

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