China Advanced Membrane Filter Press Factory

SINOU Membrane Filter Press is a high-end deep dewatering equipment upgraded on the basis of traditional filter presses. Different from single filtration devices, it is equipped with elastic membrane plates and supports dual working modes of primary filtration + secondary high-pressure squeezing.

By injecting high-pressure water or compressed air to inflate the membrane, it squeezes filter cakes in all directions to extrude interstitial water and bound water that are hard to remove by conventional methods, achieving ultra-low moisture content of solid materials.

This membrane filter press is specially developed for high-viscosity, fine-particle and hard-to-dewater sludge. It features high dewatering efficiency, short working cycle and remarkable sludge reduction effect.

Widely used in municipal sewage, chemical industry, mining tailings, printing and dyeing, electroplating and other fields, it is the preferred equipment for projects with strict requirements on filter cake dryness.

Our products have passed multiple international certifications and been exported to Europe, the Middle East, Southeast Asia and other regions, gaining consistent praise from global industrial clients.

Working Principle & Operational Modes

The core technology of the membrane filter press lies in the secondary squeeze dewatering system. The whole cycle is divided into 6 links, and two optional squeeze media (water / air) are available for different on-site conditions.

Complete Working Flow

① Material Feeding & Primary Filtration: The slurry is pumped into sealed filter chambers. Under the pressure of the feed pump, solid particles are intercepted by filter cloth to form preliminary filter cakes, and free water flows out as filtrate.

② Medium Injection & Membrane Inflation: Stop feeding, inject high-pressure water or compressed air into the back of the elastic membrane plate. The membrane expands evenly to apply all-round pressure on the filter cake.

③ High-pressure Squeezing & Deep Dewatering: The sustained high pressure squeezes out capillary water and bound water inside the filter cake, greatly reducing the moisture content of solids.

④ Optional Air Blow Drying: For materials with extremely high viscosity, compressed air can be passed through the filter cake to further remove residual moisture and shorten the cycle.

⑤ Pressure Relief & Cake Separation: Release the squeeze medium, the membrane resets and shrinks, and the filter cake automatically separates from the plate surface.

⑥ Automatic Cake Discharging & Cloth Cleaning: The plate pulling mechanism opens filter plates one by one for cake unloading. The high-pressure cleaning system rinses filter cloth to complete a full cycle.

Complete Structural Configuration

(1) Reinforced Integral Frame

Adopts heavy-duty carbon steel overall welding structure with strict stress relief treatment. The frame has ultra-high compressive strength and anti-deformation performance, and can withstand long-term alternating load of high-pressure squeezing.

The exterior is coated with multi-layer anti-rust and anti-corrosion paint, adapting to dusty, humid and corrosive industrial environments. The structural layout is optimized to save floor space.

(2) Core Membrane Filter Plate

The most key component of the whole machine. It adopts food-grade / industrial-grade composite polypropylene elastic membrane plate. The main plate body has the same acid and alkali resistance as ordinary filter plates, and the surface elastic membrane has excellent flexibility, tensile resistance and fatigue resistance.

It can withstand repeated expansion and contraction under 1.0~3.0MPa high pressure without cracking or peeling. The integrated flow channel ensures smooth discharge of filtrate and squeeze medium.

(3) Special Filter Cloth

Matched with multi-density composite filter cloth targeted at high-viscosity and fine-particle materials. It has good air permeability and strong interception capacity, not easy to be blocked by tiny particles.

According to different media (acidic, alkaline, oily), we provide customized filter cloth materials to extend service life.

(4) Dual Power Hydraulic & Pneumatic System

Hydraulic Compression System: Provides basic plate-closing pressure, equipped with imported hydraulic components, stable operation, low noise and zero oil leakage.

Squeeze Medium System: Independent high-pressure water pump or air compressor unit is configured according to the selected squeeze mode, with precise pressure regulating valves to control the squeeze pressure in real time.

(5) Automatic Plate Pulling & Discharging Mechanism

Variable-frequency driven plate pulling trolley realizes one-by-one plate opening and automatic cake unloading. For sticky filter cakes, an auxiliary vibration device can be added to assist blanking, avoiding material sticking to plates. The transmission structure is precise and durable with low failure rate.

(6) Intelligent Central Control System

Standard PLC + large-size HMI touch screen. It realizes one-key full-automatic cycle operation, and supports independent setting of feeding time, squeeze pressure, holding time and other parameters.

Built-in multi-protection functions such as overpressure, overload, material shortage and medium leakage, with real-time fault alarm and record query. It can also be connected to the factory DCS system for remote centralized control.

(7) Full-automatic Filter Cloth Cleaning System

Equipped with high-pressure spray cleaning device. After each cycle, it performs comprehensive flushing on the filter cloth surface and gaps to remove attached sludge, ensuring long-term stable filtration efficiency.

Core Competitive Advantages

(1) Ultra-low Filter Cake Moisture Content: Rely on secondary high-pressure squeezing technology. The moisture content of inorganic sludge can be reduced to 15%~25%, and organic sludge to 25%~35. The sludge volume is greatly reduced, cutting subsequent transportation and landfill costs significantly.

(2) Short Working Cycle & High Output: The primary filtration stage does not need to pursue ultra-dry cakes. Combined with fast air/water squeeze and reset, the single cycle is shortened by 30%~75% compared with traditional equipment, and the overall production capacity is increased sharply.

(3) Strong Material Adaptability: It can handle various difficult-to-dewater materials such as high-viscosity slurry, fine desert sand sludge, corrosive chemical residue and oily sludge, which ordinary filter presses cannot cope with.

(4) Dual Squeeze Mode Selection: Water and air squeeze modes are optional, freely matching different site safety regulations and production rhythms.

(5) Durable Core Components: The elastic membrane plate undergoes thousands of fatigue tests, with long service life and low replacement frequency. The whole machine has low comprehensive maintenance cost.

(6) High Automation & Labor Saving: Full-process unattended operation can be realized, which is compatible with modern intelligent factories.

(7) Eco-friendly & High Comprehensive Benefit: The filtrate is clear and recyclable; the dry filter cake is convenient for resource utilization or harmless disposal, fully complying with international environmental protection standards.

Product Series & Technical Parameters

(1) Product Classification

① Standard Water-squeezing Membrane Filter Press: Uses high-pressure water as the squeeze medium. Stable performance, wide applicability, suitable for most conventional industrial projects.

② Air-squeezing High-efficiency Membrane Filter Press: Adopts compressed air for squeezing. Fast cycle, high hourly output, for large-scale continuous production lines.

③ Compact Membrane Filter Press: Miniaturized design, small footprint, for small factories, laboratory tests and renovated workshops.

④ Explosion-proof Membrane Filter Press: Equipped with explosion-proof electrical components, specially used in petrochemical, coal and other flammable and explosive environments.

⑤ Corrosion-resistant Custom Model: Matched with anti-corrosion membrane plates and filter cloth, for strong acid and alkali working conditions.

(2) Main Technical Parameters

In-depth Comparison with Peer Products

We conduct multi-dimensional horizontal comparison with Recessed Chamber Filter Press and Plate-and-frame Filter Press to highlight the differentiated advantages of membrane filter press.

Membrane Filter Press VS Recessed Chamber Filter Press

Membrane Filter Press VS Traditional Plate-and-frame Filter Press

Application Industries & Supporting Equipment

(1) Main Application Scenarios

● Municipal sewage treatment plant: Deep dewatering of domestic sludge and industrial mixed sludge

● Mining & coal washing: Tailings dewatering, coal slime treatment, dry discharge of mineral residues

● Chemical & printing and dyeing: Corrosive sludge, dye residue, catalyst slurry separation

● Electroplating & pharmaceutical: Heavy metal sludge, pharmaceutical residue filtration

● Concrete & sand washing plant: Fine sand sludge, desert sand sludge dewatering

● Food & papermaking: Fiber slurry, food residue solid-liquid separation

(2) Complete Supporting System

● Front-end facilities: Sludge collection tank + vertical / horizontal stirring tank

● Conveying equipment: Hydraulic plunger pump / screw slurry pump

● Medium supply system: High-pressure water pump / air compressor

● Pipeline accessories: High-pressure resistant HDPE pipes, valves, pressure gauges

● Back-end equipment: Belt conveyor

Professional Selection Guide

(1) Confirm sludge characteristics: For high viscosity, fine particles and corrosive media, prefer membrane filter press and customize corresponding filter plate & filter cloth materials.

(2) Define target moisture content: If the required moisture content is below 35%, the membrane model must be selected; ordinary chamber press cannot meet the standard.

(3) Calculate processing capacity: Determine the total filtration area according to daily sludge output and single cycle duration.

(4) Select squeeze mode: Choose water squeeze for explosion-proof and high-temperature sites; choose air squeeze for pursuing high efficiency and short cycle.

(5) Match power standard: Select 50Hz/60Hz electrical components according to local power supply.

(6) Consider layout space: Choose standard type or compact type according to workshop area.

Comprehensive FAQ

Q1: What is the essential difference between membrane filter press and ordinary chamber filter press?

A: The biggest difference is the dewatering process. The membrane filter press adds an elastic membrane secondary squeezing procedure. It can squeeze out the bound water that cannot be removed by single filtration, so the filter cake is drier and the sludge reduction effect is more obvious.

Q2: Which squeeze mode is better, water or air?

A: No absolute distinction. Water squeeze has more stable pressure and is suitable for flammable, explosive and high-temperature environments. Air squeeze resets faster and shortens the cycle, suitable for large-capacity continuous production. You can choose according to site conditions.

Q3: What is the service life of the elastic membrane plate?

A: Our composite membrane plate has passed tens of thousands of expansion and contraction fatigue tests. Under standard working conditions, the service life is more than 12 months. Regular maintenance can effectively extend its service life.

Q4: Can it handle sludge containing 100μm ultra-fine desert sand?

A: Yes. Equipped with special anti-blocking filter cloth and front-end stirring system, it can effectively intercept fine particles and avoid material deposition and cloth clogging, running stably for a long time.

Q5: Can the equipment work under 380V 60Hz power supply in the Middle East?

A: All electrical components support 380V/50Hz and 380V/60Hz dual standards, and are optimized for generator power supply, adapting to local power conditions.

Q6: Is the filtrate after separation reusable?

A: The filtrate after two-stage separation is clear and transparent. It can be recycled to wastewater circulation systems, production processes or discharged up to standard.

Q7: Is remote control supported?

A: The standard model supports local touch screen operation; we can customize remote monitoring and DCS docking functions to realize factory-wide intelligent management.

Standard Operation & Maintenance Rules

(1) Pre-start Inspection

① Check the tightness of filter plates and the integrity of membrane plates and filter cloth.

② Verify the liquid level of hydraulic oil, squeeze medium pressure and pipeline sealing.

③ Clear sundries inside filter chambers to prevent plate damage.

(2) In-operation Management

① Run in no-load mode first, and feed materials after confirming normal operation.

② Monitor pressure changes in real time, and avoid overpressure operation.

③ Check for slurry leakage, medium leakage and abnormal vibration at any time.

(3) Hierarchical Maintenance Plan

① Daily Maintenance

Clean residual sludge on filter cloth; check pipeline valves and running sound; keep the unit clean.

② Weekly Maintenance

Add lubricant to transmission parts and bearings; calibrate pressure sensors and instruments; inspect membrane surface for damage.

③ Monthly Maintenance

Check hydraulic and pneumatic pipeline aging; test automatic protection and alarm functions; tighten all connecting bolts.

④ Quarterly Maintenance

Replace aging sealing rings; thoroughly clean the medium pipeline; debug the automatic program.

⑤ Annual Overhaul

Overall inspection of membrane plates, filter cloth and core power components; frame derusting and repainting; full machine performance debugging.

(4) Wearing Parts Replacement Cycle

① Elastic membrane plate: 12 ~ 18 months

② Filter cloth: 6 ~ 8 months

③ Hydraulic / pneumatic sealing parts: 8 ~ 10 months

④ Squeeze pipeline accessories: 10 ~ 12 months

Packaging, Logistics & Delivery

(1) Packaging Solution: Large frame adopts waterproof tarpaulin + export wooden frame; vulnerable parts and electrical components are packed in sealed wooden cases to prevent collision, moisture and rust during long-distance transportation.

(2) Trade Terms: Support EXW, FOB, CIF, CFR and other international trade terms.

(3) Logistics Cooperation: Long-term cooperation with reliable international freight forwarders, covering sea, land and air transportation, delivering goods to Europe, Middle East, Southeast Asia, Africa and other regions safely and on time.

(4) Loading Optimization: Optimize container layout to save customers' shipping costs.

Certificates & Global After-sales System

(1) Qualification Certificates

The whole machine has passed CE, ISO 9001, ISO 14001 and other international authoritative certifications. Complete factory inspection reports, technical manuals and qualification files are provided to support overseas customs clearance, project bidding and third-party audit.

(2) After-sales Service

① Warranty Period: 1-year full machine warranty, lifetime technical consultation.

② On-site Service: Provide overseas installation guidance, equipment commissioning and professional operator training.

③ Spare Parts Supply: Equipped with global spare parts warehouse, 2-year full set of spare parts can be delivered quickly to reduce downtime.

④ Technical Support: Multilingual after-sales team provides remote video guidance 7×24 hours.