A Vertical Pressure Leaf Filter consists of a hermetically sealed tank with vertical filter leaves mounted on a central manifold at the bottom Each filter leaf is made from 5 layers of wire mesh – 2 outer filtering layers and 3 inner support layers
Vertical Pressure Leaf Filters are used for filtration of liquids with ~7% suspended solids:
- A Vertical Pressure Leaf Filter consists of a hermetically sealed tank with vertical filter leaves mounted on a central manifold at the bottom
- Each filter leaf is made from 5 layers of wire mesh – 2 outer filtering layers and 3 inner support layers
- Outer layers of fine wire mesh are selected depending on the application - these act as the primary filtering elements and eliminate the need for filter cloth
- Inner layers of coarser mesh support the outer layers and serve to collect and discharge the filtrate
- Filter cake is discharged from the bottom of the filter using a pneumatic vibrator to shake the leaves
- Cake discharge outlet is provided with a Butterfly valve that can be pneumatically controlled from a remote location, or with a wedge lock full opening valve with heel leaf
- Vertical Pressure Leaf Filters are self cleaning and simple to operate without need for repeated opening of the filter body
- The entire filtration cycle can be easily automated by using a PLC to switch between the priming, filtration, and cleaning steps at regularly timed intervals or based on pressure readings inside the filter
Applications
- Major application of Pressure Leaf Filters is in the filtration of Catalysts, Carbon black, and Bleaching earth in Edible oil processing, Crude oil Bleaching and Post-bleaching, Hydrogenation, Winterisation, and Fractionation
- Applications in the chemical and process industry include Aluminates, Fatty Acids, Sulphur, Mining, Brine, Resins, Ni Catalyst, and Electrolytes
MOC
- Filtering Mesh is manufactured from SS316L, while the inner meshes and collecting channels of the leaves are manufactured from SS304
- The housing and support elements can be manufactured from Carbon Steel, SS304, Monel, Inconel, Carbon Steel, etc. based on customer specifications
- Filters can be provided special linings such as SS304/ SS316L for food grade processes, e.g. in Vegetable Oil refining