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Filter Press Manufacturers - Shuangfa Machinery
Who is Shuangfa Machinery?
Shuangfa is specialized in manufacturing and exporting filtration equipment for many years, and the largest filter press manufacturer in central China, has CE, ISO9001, & 4 patents etc and has the rich experience to help you with your filtration process and dewatering needs.
What is a Filter Press?
Filter press is an cost-effective solution for highly efficient solid-liquid separation by using pressure filtration, the material to be filtered is pumped into filter press under the pressure, to get filter cake and filtrate, widely application.
(1)Filter press consists of frame, filter plate, pressing system(manual, mechanical or hydraulic) and electric control cabinet.
(2) Filter plates are installed on girder between tail plate and push plate, with filter cloth sandwiched in them.
The filtration cycle can be broken into the following steps: filling, dewatering (solid-liquid separation), cake wash and air blow, membrane squeeze(if applicable), and finally emptying.
During the filling process solids laden slurry is pumped under pressure into the filter press chambers through the piping at the stationary head of the filter press.
Solids within the slurry will flow to the area of cake development with the lowest pressure differential, resulting in a filter cake.
As each cake chamber fills with slurry, the liquid passes through the filter cloth across the drain-field, through the drain ports and exits via gravity out of the corner discharge holes.
The first one third to one half of the filtration cycle, when the majority of the total cake solids have been pumped into the press, is referred to as the fast fill stage.
When the flow rates begin to taper off as the cake builds in thickness and the pressure differential increases.
The solids deposition process continues until the filter cakes forming on the individual chamber walls bridge at the center, completely filling the press with solids.
Solids are continually pumped into the chamber reducing interstitial space by compacting particles; it is during this final stage that the filter cake achieves maximum dryness.
Cake Wash & Air Blow
If the cake contains desirable components that require subsequent processing, undesirable components can be flushed from the cake by means of water or an appropriate solvent.
Air blowing cakes can be utilized for additional moisture reduction.
If using membrane squeeze plates, the membranes filter plate can be inflated using either air or hydraulic pressure applying a mechanical force on the filter cake contained in the chamber, which will physically compress the filter cake and force out additional moisture held within the cake resulting in drier cake solids.
The last step is to remove the de-watered filter cake and ready the filter press for the next batch.
The individual filter plates are separated and the collected solids (filter cake) are discharged, usually by gravity, to an appropriate receptacle.
Filter Press Accessories
Contact us with questions regarding your filtration equipment or how to further optimize your filter press operation. Shuangfa filtration equipment experts are always at your hand.