A chamber filter press is an efficient batch-type solid-liquid separation equipment and an upgraded iteration of the plate and frame filter press. The equipment consists of paired concave filter plates spliced to form sealed filter chambers, with filter cloth as the filtration medium. The feed pump pressurizes the feed liquid to drive the liquid through the filter cloth for discharge, while solid particles are trapped and form filter cakes in the filter chambers, thereby achieving solid-liquid separation.
Featuring a compact structure, low filter cake moisture content, and convenient operation and maintenance, the equipment is suitable for treating high-turbidity and high-viscosity feed liquids in multiple fields such as chemical engineering, metallurgy, mining, municipal sewage treatment, food, and pharmaceuticals. Manual, semi-automatic, or fully automatic control modes can be selected according to production scale, making it one of the most widely used core equipment in industrial solid-liquid separation processes.

Overview of the Core Principle

The core working principle of a chamber filter press is pressure-driven filtration + filter chamber interception to form cakes. The entire operation cycle is divided into four key stages:
1.Filter Chamber Sealing Stage: The clamping device (hydraulic or mechanical) pushes the movable pressure plate to closely fit multiple concave filter plates. The concave areas of adjacent filter plates combine to form independent sealed filter chambers, and the filter cloth is fixed on the surface of the filter plates, serving as a barrier for solid-liquid separation.

2.Pressurized Filtration Stage: After the feed pump pressurizes the feed liquid to 0.2-2.5MPa, it is sent into the filter chamber through the feed channel on the filter plates. Under the action of pressure difference, the liquid (filtrate) in the feed liquid passes through the filter cloth and is collected and discharged through the drainage grooves on the surface of the filter plates. Solid particles are trapped by the filter cloth and gradually accumulate in the filter chamber until the filter chamber is filled with filter cake, and the filtration stage ends.

3.Filter Cake Washing/Blowing Stage (Optional)
1.Washing: For working conditions requiring filter cake purification, washing water is introduced. Under pressure, the washing water passes through the filter cake layer to elute soluble impurities in the filter cake and improve filter cake purity.
2.Blowing: Compressed air is introduced to blow off residual moisture in the filter cake and filter cloth, further reducing the filter cake moisture content and lowering subsequent transportation and treatment costs.
3.Unloading Stage: The clamping device releases pressure, the movable pressure plate retreats, and the filter plates are pulled apart one by one manually or by an automatic plate pulling device. The filter cake falls off the filter cloth by its own weight or the scraping action of the unloading device, completing one solid-liquid separation cycle.

Product Introduction

Chamber filter presses can be divided into multiple series according to clamping methods and control methods, with core parameters and characteristics as follows:
1. Classification by Clamping Method

Mechanically Clamped Chamber Filter Press: Adopts screw drive to clamp the filter plates, featuring a simple structure, low manufacturing cost, and convenient maintenance. It has a small adjustable range of clamping force (≤0.6MPa) and is suitable for low-pressure, small-batch solid-liquid separation scenarios such as laboratory small-scale experiments and small workshops. Its disadvantage is low automation and high labor intensity.
Hydraulically Clamped Chamber Filter Press: Driven by a hydraulic system for clamping, it has a large and stable clamping force (0.8-3.0MPa) and excellent sealing performance of the filter chamber. It can meet high-pressure filtration requirements and is suitable for medium and large-scale industrial production. Equipped with an automatic pressure maintaining function, it can automatically supplement pressure when the clamping force decreases, ensuring stable filtration. It is currently the mainstream type in the industrial field.

2. Classification by Control Method

Manual Chamber Filter Press: Clamping, pulling apart, and unloading of filter plates are all operated manually. The equipment has a simple structure and low price, suitable for small-batch and intermittent production scenarios such as purification of small chemical reagents and laboratory sample processing.
Semi-Automatic Chamber Filter Press: The hydraulic system automatically completes the clamping and pressure maintaining of filter plates, while pulling apart and unloading of filter plates require manual assistance or a semi-automatic plate pulling device, reducing labor intensity. It is suitable for small and medium-scale continuous production such as residue separation in food processing plants and sludge dewatering in small sewage treatment stations.
Fully Automatic Chamber Filter Press: Integrates a PLC control system, automatic plate pulling device, automatic filter cloth cleaning device, and filter cake conveying device. It realizes the full-process automatic operation of clamping - feeding - filtration - washing - blowing - unloading - filter cloth cleaning without manual intervention, with high operation efficiency. It is suitable for large-scale and continuous production scenarios such as large-scale mine tailings treatment and advanced treatment of chemical park wastewater.

Selection Reference Table

Model Series	Clamping Method	Control Method	Filter Plate Material	Filter Plate Size (mm)	Clamping Force (MPa)	Filtration Area (m²)	Key Selection Parameters	Core Adaptable Working Conditions
XM Manual Series	Mechanical	Manual	Polypropylene	320×320-500×500	≤0.6	0.5-10	Feed liquid processing capacity, experiment scale	Laboratory small-scale experiments, small workshops
XB Semi-Automatic Series	Hydraulic	Semi-Automatic	Polypropylene/Cast Iron	500×500-1000×1000	1.0-1.6	10-50	Feed pressure, feed liquid viscosity	Food processing, small sewage treatment stations
XZ Fully Automatic Series	Hydraulic	Fully Automatic	Polypropylene/Stainless Steel	800×800-2000×2000	1.6-3.0	50-500	Automation requirements, filter cake moisture content requirements	Mine tailings, large-scale chemical wastewater treatment
XG High-Temperature Series	Hydraulic	Semi-Automatic/Fully Automatic	Cast Iron/Stainless Steel	630×630-1500×1500	1.6-2.5	20-200	Feed liquid temperature (≤200℃), corrosion resistance	Metallurgical high-temperature ore pulp, pharmaceutical high-temperature feed liquid

Application Scenarios

With efficient solid-liquid separation capacity and wide adaptability, chamber filter presses cover multiple industrial fields, with core application scenarios as follows:

1. Municipal Environmental Protection Field

Dewaters sludge from municipal sewage treatment plants, reducing the moisture content of sludge from 99% to 60%-80%, greatly reducing sludge volume and facilitating subsequent landfill, incineration, or resource utilization. It treats industrial wastewater (printing and dyeing, papermaking, electroplating wastewater) to remove suspended solids and heavy metal precipitates in the wastewater, ensuring that the effluent meets discharge standards.

2. Mining and Metallurgical Field

Dewaters tailings pulp from gold, copper, iron, and other mines, realizing dry discharge of tailings, reducing the floor area of tailings ponds, and lowering environmental risks. It treats smelting sludge and dust removal wastewater in the metallurgical industry to recover valuable metals and improve resource utilization rate.

3. Chemical Field

Used for the filtration of intermediates and finished products in industries such as pesticides, dyes, chemical fertilizers, and coatings. For example, dreg separation in pesticide production and pigment solid-liquid separation in coating production. The filter cake moisture content is as low as 25%-35%, improving product purity and yield.

4. Food and Pharmaceutical Field

In the food industry, it is used for juice clarification, soy sauce residue filtration, and edible oil refining. In the pharmaceutical industry, it is used for dreg filtration and antibiotic extract clarification. The stainless steel filter plate model can meet GMP certification requirements to ensure product hygiene and safety.

Product Features and Achieved Effects

1. Core Product Features

Feature	Specific Description
High Solid-Liquid Separation Efficiency	High-pressure filtration can trap tiny solid particles, with a suspended solid removal rate of ≥99% in the filtrate and high clarity, enabling direct reuse
Low Filter Cake Moisture Content	Under the dual action of hydraulic clamping and air blowing, the filter cake moisture content is 5%-10% lower than that of plate and frame filter presses, reducing subsequent treatment costs
Compact Structure and Good Sealing Performance	The concave design of filter plates ensures no dead corners in the filter chamber, excellent sealing performance, no risk of feed liquid leakage, and suitability for high-pressure filtration working conditions
Convenient Operation and Maintenance	Filter plates are easy to disassemble and assemble, and filter cloth is simple to replace; fully automatic models can realize unattended operation, reducing labor costs
Strong Adaptability	Can handle feed liquids under various working conditions such as high turbidity, high viscosity, corrosion, and high temperature. The filter cloth can be customized according to the characteristics of the feed liquid

2. Practical Application Effects

Water Purification Effect

When treating industrial wastewater, the suspended solid concentration of the filtrate can be reduced to below 5mg/L, meeting the first-class standard of "Integrated Wastewater Discharge Standard" (GB 8978-1996). When treating municipal sewage, the volume of sludge after dewatering is reduced to 1/10-1/5 of the original volume, lowering the difficulty of sludge disposal.

Resource Recovery Effect

After dewatering of mine tailings, the filter cake can be used for brick making, backfilling, or extracting valuable metals. In the chemical industry, useful components in the filter cake can be recovered, and the raw material utilization rate is increased by 10%-15%.

Cost Control Effect

Low filter cake moisture content reduces sludge transportation costs by 30%-50%; fully automatic models can save more than 60% of labor costs and greatly improve production efficiency.

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