FILTER PRESSES

The chamber filter presses we produce are used for dewatering technological sludges and wastewater in various industries:

in the chemical industry in technological processes,
in metallurgy for dewatering ores and concentrates,
in heating for flue gas desulfurization processes,
in mining for dewatering flotation tailings and waste,
in municipal wastewater treatment plants and industrial wastewater such as electroplating, grinding, painting, and others,
in other technological processes requiring dewatering.

The filter presses we produce consist of a support structure, an actuator system with a power unit, fitted with a filter cloth, a package of filter plates, and a supply and control system. The work cycle begins by compressing the filter plates (closing the press), after which the press is ready for sludge injection into the chambers, where the filter cloth acts as a barrier, while the filtrate (effluent) is drained from the press either centrally through a collection manifold or individually from each plate. After the chambers are filled with sludge, forming a filter cake, and the remaining sludge in the supply manifold is removed with a reverse air pulse, it is possible to perform cake washing and blowing operations to improve filtration effects.

The press is unloaded by mechanically or manually separating the individual filter plates. The sludge in the form of formed filter cakes falls into a container or onto a conveyor, completing the filter press work cycle.

Standard filter press construction includes:

the press support structure with a hydraulic cylinder or compression screw for 400x400mm presses,
polypropylene filter pack with a complete set of filter cloths,
hydraulic power unit,
press power and control system 220/380 V,
mechanical plate separation system standard from 800x800mm format.

Additional equipment for presses can include:

sludge pumping system with inverter based on screw pumps,
tilting gates with electropneumatic drive,
sludge collection - with a stationary or self-propelled container, belt or screw conveyor,
filter cloth washing system,
sludge pre-treatment system,
microprocessor control system.

The effects obtained in the filtration process depend on many factors, including:

the type of sludge supplied to the press (crystalline, amorphous, fibrous, etc.),
the filtration aids used (polyelectrolytes, flocculants),
the surface area and volume of the filter chambers,
the sludge feed pressure,
the duration of the filtration cycle, etc.

Below we present representative filtration results from moisture tests (the percentage indicates the moisture content of the filter cake):

coal industry sludges: 18.0-30.0%
copper concentrates: 13.5-20.0%
tannery sludges: 23.0-65.0%
electroplating sludges: 33.0-80.0%
defecation sludges in sugar factories: 28.0-30.0%
phosphate, carbonate, brine solutions: 21.0-40.0%
municipal sludges: 52.0-70.0%
meat industry sludges: 31.0-55.0%
petroleum-derived sludges: 40.0-45.0%
peat sludges: 58.0-65.0%