Oilgae - Glossary

Liquid filtration occurs when a suspension of a solid in a liquid passes through a filter. That process takes place when the liquid is pulled through the filter by gravitational force (as in the laboratory example mentioned above) or is forced through the filter by some pressure applied to the mixture. In some filtration systems, a vacuum is maintained in the receiving container. Then normal atmospheric pressure has a greater effect in forcing the mixture through the filter - Source

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Filter Press For Continuous Filtration Under Pressure: A filter press operating under pressure including a vessel (1) filled with crude material with compressed fluid lying above. A hollow shaft projects into the vessel and supports an assembly of filter elements immersed in the crude material. At least one drying and removing unit for the filter cake is mounted in the vessel above the crude material, into which the filter elements are brought in succession. Driving means are provided for imparting a stepwise movement to the filter elements to the filter assembly and a raising and lowering movement to the individual filter elements with respect to the drying and removing unit.