Filtration is unit operation. A filter press is a time tested & is most commonly used liquid-solid separation equipment. It is used to reduce the bulk & weight of a product to filtered by separating liquid filtrate and solid filter cake. This process is often referred to as dewatering. Given below are the steps involved in operation: |
- The process slurry is pumped at the inlet of equipment using a feed pump - Filtration occurs inside filter press in series of chambers designed to increase filtration area & filtration rate. - Filtered liquid (filtrate) passes through filter cloths and exits the machine leaving behind solids (filter cake). - Filter cake remains inside chambers of equipments. this cake can be washed with solvent and/or washed with compressed air as per process requirements. - The equipment is then opened and the filter cake is discharged by gravity as each plate is shifted.
Above operation is a batch process. Depending on the particular application, the filter press may be used to recover either the solid particulate, the liquid stream, or both. The filter press accomplishes dewatering within a series of chambers into which a process slurry is pumped using a feed pump.
- Effluent treatment plants - Metals, metal finishing, minerals - Petrochemical and oily slurries - Filtering of fruit juices, wine, vegetable oils and flavour extracts - Industrial laundries - Tanneries and textile waste - Paint sludge - Filter backwash - Municipal water treatment plant sludge - aluminium and lime - Municipal wastewater treatment plant sludge-activated - Chemical separation processes - Dewatering and washing of pigments and dyestuffs - Environmental Remediation - Pre-filtration and Clarification - Corrosive, acidic, alkaline slurry filtration
This equipment has no moving parts when the filtration is in progress hence filter press is known for negligible maintenance. Equipment is also known to operate for years without process breakdown.
Related Articles -
Basket Strainer, Basket Strainers, Strainers,