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Experimental Research on Treatment of Oil-water Emulsion by Rotary Ceramic Membrane Dynamic Cross-flow Filter

Authors： WANG Shuaishuai, GUAN Shun, CHEN Jiaqing, SI Zheng, HU Jianlong, AN Shenfa, WANG Xiujun, GU Yu, YANG Hanyue

Units： 1School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, P. R. China; 2Beijing Key Laboratory of Pipeline Critical Technology and Equipment for Deepwater Oil & Gas Development, Beijing 102617, P. R. China; 3Petroleum Engineering Technology Research Institute of Shengli Oilfield Branch, SINOPEC, Dongying 257067, P. R. China; 4CNOOC Research Institute Co., Ltd., Beijing 100027, P. R. China

KeyWords： Ceramic membrane separation; cross-flow filtration; shaft-disk rotary structure; oil-water emulsions; oil removal efficiency; membrane permeate flux

ClassificationCode：TE99

year,volume(issue):pagination： 2022,42(3):113-121

Abstract：

Ceramic membrane separation has attracted much attention in the field of oil-water separation for a long time because of its high separation efficiency and no phase transition. However, the conventional ceramic membrane module has some shortcomings, such as the decrease of membrane flux with the increase of filtration working time, which affects its engineering application. The dynamic cross-flow filtration of shaft-disk rotary ceramic membrane with arc radiation channel is a new cross-flow filtration technology developed in recent years. Up to now, it has not been used to separate high-concentration oil-water emulsions. In this paper, based on the customized rotary ceramic membrane dynamic cross-flow filter, the experimental research of separation performance was systematically carried out under different operating conditions such as trans-membrane pressure and motor speed. The oil removal efficiency and membrane permeate flux of high concentration oil-water emulsions with different oil content were compared. The experimental results show that, under all conditions, the oil removal efficiency of the shaft disk rotary ceramic membrane dynamic cross flow filter is more than 99.5%. According to the comprehensive oil removal efficiency and membrane permeate flux, the best operating filter conditions for treating oil-water emulsions are trans-membrane pressure 0.1 MPa and motor speed 1400rpm, and the oil removal rate is 99.88% when separating oil concentration 10% (V) oil-water emulsions. The compressed air backwashing method can quickly restore the reduced membrane flux and realize the long-term stable oil removal of the ceramic membrane.

Funds：

中国石油化工股份有限公司科研项目(320047)；国家自然科学基金企业创新发展联合基金重点支持项目（U20B2030）

AuthorIntro：

王帅帅（1996-），男，硕士研究生，研究方向为环保多相流高效分离技术与设备。

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