Polypropylene High Pressure Plate And Frame Fully Automatic Filter Press For Sludge Dehydrator Membrane Type

Polypropylene high pressure plate and frame filter press for sludge dehydrator membrane type

The membrane plate and frame filter press, is with automatic plate pulling out device by mechanical arm. It saves labor cost.

It's feed from one corner, which are widely used in waste water or slurry treatment, industries from plating and metal finishing to chemical and food processing. Our filter Presses feature heavy duty steel construction with polypropene gasketed plates. These filter presses can be manufactured with manual or automatic closures, but always with a hydraulic cylinder for sure, high pressure closing. The filter pressescan be expanded for larger future capacity by building it in a larger skeleton with a distance piece.  Once you are ready to expand, you can remove the distance piece  and add the extra plates.

Work process

The diaphragm filter press comprises a set of vertical, juxtaposed recessed plates, presses against each other by hydraulic jacks at one end of the set. The pressure applied to the joint face of each filtering plate must withstand the chamber internal pressure developed by the sludge pumping system.
This vertical plate layout forms watertight filtration chambers allowing easy mechanisation for the discharge of cakes.

Filter chlotes finely or tightly meshed are applied to the two groowed surfaces in these plates. Orifices feed the sludge to befiltered under pressure in the filtration chamber. They are usually placed in the center of the plates allowing a proper distribution of flow right pressureand better drainage of sludge within the chamber.Solid sludge gradually accumulate in the filtration chamber until the final compacted cake is formed. The filtrate is collected at the back of the filtration support and carried away by internal ducts.

Filtration cycle

• The filter press is an intermittent dewatering process. Each press operation includes the following steps:
• Closing of the press: as the filter is completely empty, the moving head activated by the jacks calmps the plates.
• Closing pressure is self regulated through filtration
• Filling: During this short phase chamber are filled with sludge for filtration. Filling time depends on the flow of the feed pump. For sludge having good filterability it is best to fill the filter very quickly so as to avoid the formation of a cake in the first chamber before the last ones have been filled.
• Filtration: Once the chamber have been filled continuous arrival of sludge to be dewatered provokes a rise in pressure due to the formation of an increasingly thick layer of filter sludge on the cloths. This filtration phase can be stopped manually, by a timer or more convenientely by a filtrate flow indicator which issues a stop alarm when the end of filtration rate has been reached. When the filtration pump has stopped, the filtrate circuits and central duct, which is still filled with liquid sludge, are purged by compressed air.
• Filter opening: The moving head is drawn back to disengage the first filtration chamber. The cake falls has a result of his own weight. A mechanised system pulles out the plates one by one. The speed of plate separation can be adjusted to account to the cake texture.
  Washing: Whasing of clothes should be carried out every 15-30 processing oprations. For mid- or large units this take place on press using water sprayers at very high pressure (80-100 bar). Whasing is sincronized with separation of plates.

Flow chart of squeezing press filtering and washing - Free flow type

Flow chart of filtering, washing and crushing flow chart - Under current flow type

Filtration capacity

The production capacity of a filter press is somewhere between 1.5 and 10 kg of solid per m2 of filtering surface.

 For 
every the filter press model the chamber volume and the filtering surface depend on the number of plates in the

 filer.

In practical terms pressing times are less then four hours. 
Filtration time depends on:

• cake thikness
• sludge concentration
• specific resistance
• compressibility coefficient.

One of the advantages of the filer press is that it can accept sludge with average filterability. It is always advantageous to

optimally thicken sludge before filter press operations. Although sludge presenting a high filterability enables better production

capacities, a filter press still accepts sludge with low conditioning precision. This tolerance means that the device offers

greater owerall operational safety.

Data sheet

Pipe line diagraphm

Performance

The filter press is suitable for almost all types of sludge:

    Hydrophilic organic sludge: inorganic conditioning is often recommended to enable satisfactory cake release due to minimal
    aderence to filter cloth.
    Hydrophilic inorganic sludge: the filer press generally requires the addition of lime only.
    Hydrophobic inorganic sludge: it is very dense and ideal for the filter press. It is dewatered without any preliminary conditioning.
    Oily sludge: the filter press can be used to treat sludge containing light oils, the presence of grease can sometimes impair the
    smooth running of the filter; clothes have to be degreased at frequent intervals.

Accessories

Competitive advantage

Quality - Rapid filtration, highly automated, stable performance, easy operation and equipped high temperature, high pressure, anti-corrosion, reliably sealing filter plates. We strictly execute ISO9001 quality control system, striving to offer our client the products with advanced technology and best quality to achieve the best filtration.
 
Service  We always have the faith that customer is highest. Before selling out products, we offering technology advice, solution design and give guidance on installation and commissioning. We always follow the using status of our machine, striving to offer all-round premium service.
 
Technology  We constantly adopt advanced technology for filter press to make the products apply with the most innovative science & technology. We also can make custom designed filter press, filter plates and accessories. To meet the market demand, we brought novel & leading technology filter presses together with German designers.