Filter Press

Filter Press
Product Introduction:

Filter press is a device that uses pressure difference to separate solid and liquid, and is widely used in chemical, mining, metallurgy, food, environmental protection (wastewater treatment) and other fields. It uses filter media (filter cloth/filter plate) under high pressure to achieve rapid dehydration of slurry, form filter cake and discharge filtrate.


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Description

Product information


Core functions and features

Efficient dehydration: The pressure can reach 0.4-2.0MPa, significantly reducing the moisture content of the filter cake (such as the moisture content of the pulp after dehydration can be reduced to 15%-25%).

Flexible regulation: Adapt to different material characteristics by adjusting the pressure and filtration time.

Environmental protection and energy saving: Compared with centrifuges, it has lower energy consumption and no dust risk.


Key components and functions

Filter plate/filter frame:

Material: polypropylene (PP), reinforced nylon, stainless steel (corrosion resistant).

Structure: open flow (visible filtrate discharge)/undercurrent (closed pipeline).

Filter cloth:

Selection basis: acid and alkali resistance (such as polyester), temperature resistance (such as polypropylene ≤90℃), air permeability (mesh number).

Hydraulic system:

Provide compression force (usually 10-20MPa), electric hydraulic pump or manual operation.

Control system:

Fully automatic programmable PLC control, realizing the whole process of compaction-feeding-washing-unloading.


Core parameters of model selection

Processing capacity: calculated according to the volume of the filter chamber (L) and the cycle (times/hour).

Filtration pressure: generally 0.6-1.6MPa, and the diaphragm pressing stage can reach 2.0MPa.

Filter cake moisture content: diaphragm filter press is 5%-10% lower than ordinary chamber type.

Special requirements: explosion-proof (chemical industry), high temperature resistant (ceramic industry), aseptic (food grade 304 stainless steel).


Workflow (taking automatic chamber type as an example)

Press the filter plate: the hydraulic cylinder pushes the filter plate to form a closed filter chamber.

Feed pumping: the slurry passes through the filter cloth under pressure, and the solids are intercepted to form a filter cake.

Washing/drying (optional): replace the residual filtrate with clean water or blow with compressed air.

Discharging: Pull the filter plate apart, and the filter cake will fall off automatically (with the aid of a vibrator if necessary).


Common problems and solutions

The filtrate is turbid:

Reason: The filter cloth is damaged or the mesh size does not match.

Solution: Replace the filter cloth or add a pre-coat (such as diatomaceous earth).

The filter cake is not formed:

Reason: Insufficient feed pressure or too fine material particles.

Solution: Increase pump pressure or add flocculants (such as PAC).

Filter plate leakage:

Reason: Sealing surface wear or uneven clamping force.

Solution: Repair the sealing surface or recalibrate the hydraulic system.


Maintenance and optimization

Daily maintenance:

Cleaning the filter cloth (backwashing or ultrasonic cleaning), checking the hydraulic oil level.

Key life parts:

Filter cloth (3-6 months), filter plate (3-5 years), hydraulic seal (1-2 years).

Energy efficiency optimization:

Use variable frequency pump to reduce power consumption, and waste heat recovery to dry the filter cake.


Cutting-edge technology

Intelligent:

Integrated pressure sensor and AI algorithm to optimize filtration cycle in real time (such as Endress+Hauser solution).

New material filter plate:

Carbon fiber reinforced composite material (lightweight + corrosion resistance).

Zero emission design:

Combined with steam drying to achieve full drying of sludge (water content <5%).

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