The Behavior of Phobic and Philip Oil Mist Filters Under High Pressure

다국어 초록 (Multilingual Abstract)

The aim of this paper is to study the changing law of fi lter media properties under high-pressure conditions, and for this purpose, an experimental setup was established to measure the properties of fi lter materials at a maximum pressure of 5 MPa. By observing the experimental phenomena produced under diff erent pressures, combining the experimental data and experimental phenomena for qualitative and quantitative analyses, the fi lter media performance change pattern under diff erent pressures was obtained. The experiments were carried out at a pressure of 1–5 MPa, and the detailed experiments were conducted on the pressure drop, saturation and the liquid distribution pattern of the fi rst and last layers of the fi lter material. The experimental results show that the liquid fi lm on the surface of the fi lter media becomes progressively thinner with increasing pressure, and the jump pressure drop becomes smaller while the saturation increases. The saturation of the fi rst layer of the oleophilic fi lter media increased by 30% and the saturation of the last layer of the oleophobic fi lter media increased by 80% when the pressure was increased from 1 to 5 MPa. In addition, the results show that with increasing pressure, the surface tension of the droplets decreases and the surface tension of the DEHS decreases from 28.72 to 25.26 mN/m. The capillary force of fi lter media B was reduced from 0.20 to 0.13 mN, a 35% reduction in capillary force which changed the distribution of droplets on the fi bres and enhanced the wettability of the fi lter material. This discovery is of great signifi cance for understand ding the variation pattern of fi lter media performance under high-pressure conditions, and provides a basis for the design and manufacture of fi lter elements for high-pressure occasions.