The plate-and-frame filter press is a widely used equipment for solid-liquid separation, whose working principle mainly relies on filter cloth to separate solids and liquids. The following elaborates on the application principle of the plate-and-frame filter press in solid-liquid separation.
The plate-and-frame filter press is primarily composed of plates and frames, filter cloth, a hydraulic system, an electric control system, etc. Its working principle can be summarized into three steps: feeding, filtration, and discharging.
First, the plate-and-frame filter press pumps the material to be separated into the filter chamber via a feed pump. During the feeding process, solid particles in the material are retained on the surface of the filter cloth, while the liquid permeates through the filter cloth into the interior of the filter chamber.
Subsequently, the hydraulic system of the filter press exerts pressure on the plates and frames, causing the filter cloth to adhere tightly to their surfaces, thereby intercepting solid particles. Under pressure, solid particles in the liquid are retained by the filter cloth, achieving solid-liquid separation. The hydraulic system can also maintain or release pressure as needed to ensure a stable filtration effect.
Upon completion of filtration, the electric control system activates the hydraulic system to loosen the plates and frames. A scraper then removes the solid particles from the filter cloth, completing the separation of solids and liquids. Simultaneously, the filtered liquid is discharged from the filter chamber.
Plate-and-frame filter presses are widely used in solid-liquid separation across industries such as chemical processing, environmental protection, food production, and pharmaceuticals. They are employed in diverse separation tasks, including sludge dewatering, activated carbon recovery, and pulp filtration. Customized designs are available to meet specific process requirements and client needs.
Technical Parameters
Model | Remarks |
LFYL400/1500-30UB Filter Press （Main Unit） | · The quoted filter press includes the following features: · Automatic Plate Shifting: Motor-driven mechanism for efficient plate movement. · Hydraulic Compression System: High-pressure clamping with automatic pressure maintenance (self-compensating). · Separate Hydraulic Power Unit: Isolated hydraulic station for easy maintenance. · Open Discharge Design: Transparent drainage for real-time process monitoring. · Filter Plates: Reinforced polypropylene (PP) material for chemical/abrasion resistance. · Beam Structure: Solid steel plate (Q345) with precision machining for load-bearing durability. |
Filtration Area | 400m2 | Chamber Volume | 6007L | Cake Thickness | 30 mm |
Filtration Pressure | 0.8MPa | Number of Filter Plates | 99 Pcs | Filter Plate Size | 1500mm*1500mm |
Cylinder Bore Diameter | 320mm | Maximum Cylinder Stroke | 450 mm | Cylinder Working Pressure | 25MPa |
Filter Press Power | 11.6kw | Slurry Pump Power | 37 kw | Conveyor Belt Power | / |
Sludge Cake Moisture Content | ≤45% | Main Unit Weight | 30000 kg | Main Unit Dimensions | 11660*2350*1920mm |
Filter Press Main Component Configuration Sheet
LFYL 400-1500-30U Filter Press Parameters |
Item | Configuration | LFYL400－1500-30U | Remarks |
Filter Plates & Media | Number of Filter Plates | 99 Pcs | Reinforced polypropylene (including head/tail plates) Technical specs:
- Tensile strength: 56MPa
- Elongation rate: 800%
- Processing tolerance:≤0.157mm parallelism, 0.012/100mm² flatness
- Thickness tolerance: ±0.20mm
- Processing grade: Class 5 |
Plate Dimensions | 1500mm*1500mm | Molded from virgin polypropylene |
Filter Cloth Quantity | 99 Sets | Polypropylene material |
Filter Cloth Specification | Matched with 1500-type plates | Abrasion-resistant, acid/alkali-proof woven fabric |
Discharge Type | Open double-discharge | Open flow |
Handle | Automatic handle | Single-side handle with pulley positioning:
- Flat wheel + positioning wheel
- Contact surface with beam features flat / grooved slots for automatic plate alignment during operation |
Basic Parameters | Chamber Thickness | 30mm |
|
Chamber Volume | ≈6007L |
|
Filtration Area | 400 m² |
|
Overall Dimensions | ≈11660*2350*1920mm | Length× Width ×Height |
Main Frame Structure | Frame Material | Q345 steel plate | Welded with CO₂ gas shielding; open structure; acrylic polyester anti-corrosion coating |
Beam Structure | Premium Q345 bridge steel | Box-welded design with submerged arc welding: Precision-machined paired beams to prevent lateral force during compression |
Surface Treatment | High-speed shot blasting | Rust / scale removal → epoxy mica iron primer → acrylic polyester coating |
Paint System | Epoxy anti-corrosion paint |
|
Feed Method | Center-feed | DN150 carbon steel flange (GB standard) |
Discharge Method | Dual open-discharge | Straight-through drain valves |
Plate Release | Automatic | Cylinder retracts to limit → mechanical plate shifter auto- discharges |
Drive System | High-pressure oil pump | Horizontal motor-driven |
Hydraulic System | Filtration Pressure | 0.8MPa | Feed Pressure |
Clamping Pressure | 25MPa | Operating Pressure |
Pressure Compensation | Auto-start if<20MPa | Relay-Controlled |
Clamping Method | Hydraulic auto-pressure maintenance | Automatic Pressure Replenishment |
Hydraulic Cylinder | Reinforced detachable dual cylinders (Ø320mm) | - Material: 27SiMn seamless steel pipe
- Piston rod: 45# steel (HRC48-50 hardness) - Protective sleeve installed |
Cylinder Seals | Polyurethane + PTFE Copper Seals |
|
Hydraulic Hoses | High-Pressure 36MPa Low- Pressure 20MPa |
|
Cylinder Stroke | 450mm | Working Stroke |
Hydraulic Motor | Ningbo Hengli | 10-Port |
Hydraulic Components | Ningbo Hengli |
|
Plate Shifting | Auto/Manual Switchable | Emergency stop pull-cord installed |
Corrosion Protection | Carbon Steel Epoxy Treatment |
|
Control Mode | Programmable Automation |
|
Electrical Control System | Control Cabinet | Programmable logic controller (PLC) | Features include: automatic clamping, pressure maintaining, pressure compensation, automatic plate release, and safety pressure relief functions. |
Relays | Chint Electric |
|
Limit Switches | Chint Electric |
|
Pressure Gauge | 40MPa Electrical Contact Type | “Zhipu Instruments”(China) |
Control Mode | Auto Clamping, Auto Press Maintenance, Auto Pressure Compensation | Fully automated pressure management |
Discharge Type | Open Flow |
|
Control System | Host automatic control | Customer-provided 3-phase 4-wire, 50Hz |
Auxiliary Equipment | Slurry Pump | Horizontal type | Power：37 kW |
Discharge Conveyor |
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RUSSIAN 
