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High-Pressure Diaphragm Filter Press – Low Moisture Cake, Automated Sludge Dewatering

Brief Introduction:

The diaphragm filter press is an efficient and energy-saving equipment for solid-liquid separation, widely used in fields such as chemical industry, food, environmental protection (wastewater treatment), and mining. It achieves significant improvement in filtration efficiency and reduction in filter cake moisture content through high-pressure filtration and diaphragm compression technology.


Product Detail

Product Introduction

The membrane filter press is an efficient solid-liquid separation equipment.

It uses elastic diaphragms (made of rubber or polypropylene) to conduct a secondary squeezing on the filter cake, significantly enhancing the dehydration efficiency.
It is widely applied in the sludge and slurry dehydration treatment of industries such as chemical engineering, mining, environmental protection, and food.
Product features
✅ High-pressure diaphragm extrusion: The moisture content of the filter cake is reduced by 10% to 30% compared to ordinary filter presses.
✅ Fully automatic operation: Controlled by PLC, it realizes automatic pressing, feeding, extrusion, and discharging.
✅ Energy-saving and efficient: Shortens the filtration cycle and reduces energy consumption by more than 20%.
✅ Corrosion-resistant design: Available in PP/steel options, suitable for acidic and alkaline environments.
✅ Modular structure: Filter plates can be quickly replaced, making maintenance convenient.
Working principle
原理图
1. Feed stage: Slurry (mud/ore slurry) is pumped in, and solid particles are retained by the filter cloth to form a filter cake.
2. Diaphragm compression: Inject high-pressure water/air into the diaphragm to perform a second compression on the filter cake.
3. Drying and dehumidification: Introduce compressed air to further reduce moisture.
4. Automatic discharging: The filter plate is pulled open, and the filter cake falls off.
Application fields

1.Environmental protection industry (wastewater treatment and sludge dewatering)
Municipal wastewater treatment plant:
Used for concentrating and dewatering sludge (such as activated sludge, digested sludge), it can reduce the moisture content from 98% to below 60%, making it easier for subsequent incineration or landfill.
Industrial wastewater treatment:
Dewatering treatment of high-moisture and high-pollutant sludges such as electroplating sludge, dyeing sludge, and papermaking sludge.
Separation of heavy metal precipitates from wastewater in the chemical industrial park.
River/lake dredging: The silt is rapidly dehydrated, reducing transportation and disposal costs.
Advantages:
✔ Low moisture content (up to 50%-60%) reduces disposal costs
✔ Corrosion-resistant design can handle acidic and alkaline sludge
2. Mining and Metallurgy Industry
Tailings treatment:
Dewatering of tailings slurry from iron ore, copper ore, gold ore and other mineral processing, to recover water resources and reduce the land occupation of tailings ponds.
Dewatering of concentrate:
Improving the grade of the concentrate (such as lead-zinc ore, bauxite) makes it easier to transport and smelt.
Metallurgical slag treatment:
Solid-liquid separation of waste slags such as steel slag and red mud, and recovery of useful metals.
Advantages:
✔ The high-pressure extrusion results in a filter cake with a moisture content as low as 15%-25%
✔ The wear-resistant filter plates are suitable for high-hardness minerals
3. Chemical Industry
Fine Chemicals:
Washing and dehydration of powders such as pigments (Titanium Dioxide, Iron Oxide), dyes, calcium carbonate, kaolin, etc.
Fertilizers and pesticides:
Separation and drying of crystalline products (such as ammonium sulfate, urea).
Petrochemical industry:
Catalyst recovery, oil sludge treatment (such as oil sludge from oil refineries).
Advantages:
✔ Acid and alkali resistant material (PP, rubber lined steel) suitable for corrosive media
✔ Closed operation reduces toxic gas emissions
4. Food and Biotechnology Engineering
Starch Processing:
Drying and washing of corn and potato starch, using alternative centrifuges to reduce energy consumption.
Brewing industry:
Separation of yeast, amino acids, and antibiotic mycelium.
Beverage production:
Pressing and dehydration of beer mash and fruit residues.
Advantages:
✔ Made of food-grade stainless steel or PP material, meeting hygiene standards
✔ Low-temperature dehydration retains active ingredients









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