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    • Study on Effects of Vibration on the Diesel–Water Separation Efficiency of Different Filter Paper
    DOI：10.13949/j.cnki.nrjgc.2023.03.010
    Key Words:vibration  separation efficiency  filter paper  collision  fracture
    Author NameAffiliationE-mail
    YAN Dengkui* College of Vehicle &
    Transportation Engineering， Henan University of Science and Technology， Luoyang 471003， China     		yandk00@163.com 
    MA Zhihao* College of Vehicle &
    Transportation Engineering， Henan University of Science and Technology， Luoyang 471003， China     		mazhihao@haust.edu.cn 
    CHEN Wei DIFITE （SIP） Co.， Ltd.， Suzhou 215126， China  
    WANG Nan DIFITE （SIP） Co.， Ltd.， Suzhou 215126， China  
    WANG Xin College of Vehicle &
    Transportation Engineering， Henan University of Science and Technology， Luoyang 471003， China     		 
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    Abstract:In order to investigate the law of oil–water separation efficiency of filter paper with different structures under vibration conditions， a vibration-diesel–water separation test rig was built. The oil–water separation tests were conducted on four pieces of commercial filter paper of different structures under the vibration frequencies of 20 Hz， 50 Hz， 100 Hz， 150 Hz， 200 Hz， and 300 Hz， with vibration accelerations of 9.8 m/s2， 19.6 m/s2， 39.2 m/s2， 58.8 m/s2 and 78.4 m/s2， diesel–water interfacial tension of 22 mN/m and equivalent surface flow rate of 5 cm/min. The results showed that under the condition of 4g vibration acceleration， the oil–water separation efficiency changed significantly with a low-frequency vibration of 20 Hz. Under different vibration conditions， the oil–water separation efficiency of single-layer filter paper changed more significantly compared with that of composite filter paper. The vibration along the X direction （the same direction as the flow of diesel oil） led to a precipitous decrease in oil–water separation efficiency than along the Y direction（direction perpendicular to the direction of diesel flow and parallel to the ground） and Z direction （direction perpendicular to the ground）. The main reason for the decrease in oil–water separation efficiency was that the low-frequency vibration caused the water droplets to break away from the fibers in advance， and the water droplets collided and broke with the fibers due to the inertia generated by the vibration. The greater the vibration acceleration， the lower the oil–water separation efficiency. Under a vibration acceleration of 78.4 m/s2， the oil–water separation efficiency of filter paper No.1（single-layer coalescence filter paper）， No.3（single-layer intercept filter paper）， and No.4 （composite intercept filter paper） decreases by 7.2%， 6.7%， and 3.4%， respectively.
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