The coalescing filter is mainly designed for liquid-liquid separation

The coalescing filter is mainly designed for liquid-liquid separation. It contains two filter elements, namely: poly filter element and separation filter element. For example, in the oil dewatering system, after the oil flows into the coalescing filter, it first flows through the coalescing filter element. The coalescing filter element filters out solid impurities and coalesces extremely small water droplets into larger droplets. Most of the coalesced water droplets can be separated and removed from the oil by its own weight and settled in the water collection tank. Then the oil product flows through the separation filter element. Because the separation filter element has good lipophilicity and hydrophobicity, the water is further separated. Finally, the clean, water-free oil product flows out of the coalescence filter.
The oil first enters the lower part of the filter housing from the inlet pipe, and then flows from the outside to the inside of the filter element. At this time, the coarser particles will immediately settle down and be discharged by the drain valve, and the smaller particles are intercepted by the filter element. Finally, after the clean oil is collected by the filter element tray, it flows out of the coalescing filter from the outlet pipe. As the amount of oil to be processed increases, the contaminants deposited on the filter element will cause the pressure difference of the coalescer to rise. When the pressure difference rises to 0.15Mpa, it indicates that the coalescing filter element has been blocked and should be replaced.
The oil flows into the first-level tray from the oil inlet of the coalescing filter, and then diverges into the first-level filter element. After filtration, demulsification, water molecules grow up, and coalesce, the impurities are trapped in the first-level filter element. The water droplets settle in the sedimentation tank, and the oil enters the secondary filter element from outside to inside, collects in the secondary tray, and flows out from the outlet of the coalescing filter. The material of the secondary filter element is hydrophobic, and the oil can pass smoothly, while the free water is blocked from the filter element, flows into the sedimentation tank, and is discharged through the sewage valve.