Manual hydraulic closing plate and frame filter press for
industrial waste treatment Plate size 800mm
The filter press is the most widely used method for the sludge
treatment in wastewater treatment. It can consist just
in drainage through sand beds or it can be mechanical under vacuum
middle or high pressure conditions which require
more sophisticated equipment. It operates by applying very high
pressures to the cake.
Description
A plate 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
| Model | Filter area (㎡) | Volume of filter chamber (L) | Thickness of plate / frame (mm) | Pressure in chamber (Mpa) | Work temperature ℃ | Nos of filter plate /frame | Motor power | Dimensions (mm) | GW (kg) |
| BMY10/800 | 10 | 150 | 30/30 | <0.6 | <80 | 9/10 | 1.5 | 2347x1260x1200 | 1260 |
| BMY20/800 | 20 | 300 | 30/30 | <0.6 | <80 | 19/20 | 1.5 | 2957x1260x1200 | 1595 |
| BMY30/800 | 60 | 900 | 30/30 | <0.6 | <80 | 29/30 | 1.5 | 3567x1260x1200 | 1940 |
| BMY40/800 | 40 | 600 | 30/30 | <0.6 | <80 | 39/40 | 1.5 | 4177x1260x1200 | 2195 |
| BMY50/800 | 50 | 750 | 30/30 | <0.6 | <80 | 49/50 | 1.5 | 4787x1260x1200 | 2720 |
| BMY60/800 | 60 | 900 | 30/30 | <0.6 | <80 | 59/60 | 1.5 | 5397x1260x1200 | 3100 |
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.
