China Stainless steel filter manufacturer-Xinxiang Yinuo Machineries Co., Ltd.

The stainless steel filter is a continuous solid-liquid separation device primarily driven by vacuum negative pressure and constructed from stainless steel. It is widely used in industries such as food, pharmaceuticals, and chemicals that demand high standards of hygiene and corrosion resistance.

Working Principle:

Based on the synergistic effect of vacuum negative pressure adsorption combined with continuous drum rotation, a complete working cycle is achieved with each full rotation.

Phase	Working process	Key parameters
Filtering stage	The filter cloth on the surface of the drum comes into contact with the slurry, and the filtrate passes through the filter cloth under vacuum and enters the channel inside the drum. Solid particles form a filter cake	Vacuum degree 0.04-0.08MPa, drum speed 0.1-10r/min
Washing stage	Spray washing solution on the surface of the filter cake to replace residual mother liquor and improve product purity	Can perform single-stage or multi-stage countercurrent washing
Dehydration stage	Continue to evacuate and reduce the moisture content of the filter cake	The vacuum degree in the drying area remains stable
Unloading stage	Peel off the filter cake from the filter cloth using a scraper, folding tape, or roller	The gap between the scraper and the filter cloth is 0.5-1.5mm
Regeneration stage	The filter cloth is cleaned or backblown to restore its filtering performance	Optional ultrasonic cleaning system

Advantages of Stainless Steel Filters:

Continuous Operation: Suitable for large-scale, extended-duration processes;

High Automation: PLC integration reduces manual intervention;

Corrosion-Resistant Materials: Stainless steel construction withstands acidic, alkaline, and organic solvent environments;

Versatile Adaptability: Processes slurries of varying concentrations, viscosities, and particle sizes;

Integrated Washing/Drying Capabilities: Enhances product quality.

Material Upgrade:

Corrosion Resistance + Food Safety, Suitable for Demanding Conditions

The main body is forged from premium 304/316L stainless steel. Resistant to acids, alkalis, salt spray, and high temperatures, it handles corrosive/high-cleanliness materials like chemical acids/alkalis, food slurries, and metallurgical tailings without secondary contamination risks.

Surface undergoes polishing/passivation treatment, meeting food contact standards and industrial environmental regulations. Prevents material residue and equipment corrosion, extending service life.

Selection Considerations

Material Compatibility

Key parameters such as particle size, suspension concentration, material viscosity, and chemical corrosiveness must be prioritized to ensure equipment aligns with material characteristics.

Precise Capacity Matching

Determine drum specifications and optimal operating speed based on actual hourly/daily processing requirements to guarantee production capacity meets standards.

Filter Cake Moisture Content Control

The target moisture standard directly influences vacuum setting parameters and the optimized design of the drying zone length. Process requirements must be clearly defined in advance.

Filter Cake Washing Requirements

If the process involves filter cake washing or purification steps, a spray washing system must be designed to meet material purity specifications.

Material Selection for Contact Surfaces

Based on the corrosive strength of the material medium, select 304 stainless steel, 316L corrosion-resistant stainless steel, or higher-grade special alloy materials to extend equipment service life.

Explosion-Proof Rating Adaptation

For flammable and explosive operating environments, select explosion-proof motors and supporting control systems compliant with international/domestic industry standards to ensure production safety.

Typical Applications:

Food Industry: Widely used in starch purification, protein separation, yeast filtration, and juice clarification processes;

Pharmaceutical Industry: Meets the demanding solid-liquid separation requirements for antibiotics, vitamins, and active ingredient extracts from traditional Chinese medicine;

Chemical Industry: Precise filtration processes for calcium carbonate, aluminum hydroxide, barium sulfate, and other inorganic salts;

Environmental Engineering: Deep sludge dewatering and sediment recovery/reuse in industrial wastewater treatment;

Metallurgy & Mining: Customized solutions for concentrate enrichment and tailings dewatering.

Maintenance and Care Guidelines for Stainless Steel Filters:

Daily Maintenance:

Check vacuum level and filtrate flow rate. Promptly investigate leaks or blockages when abnormalities occur.

Regularly clean filter cloths to prevent clogging and extend service life.

Lubricate the transmission system to ensure smooth operation.

Periodic Maintenance:

Monthly inspection of distributor head sealing surfaces; promptly replace seals if worn.

Quarterly inspection of drum wall thickness to prevent corrosion perforation.

Annual complete disassembly inspection and overhaul; replace aged components.

Common Troubleshooting Procedures:

Fault Symptoms	Possible causes	Recommended Treatment Method
Vacuum pressure drops sharply	Distribution Head Seal Failure / Filter Cloth Damage	Immediately shut down the machine, inspect the O-ring on the distribution head, and replace the damaged filter cloth.
Difficulty in filter cake separation	Insufficient backflush pressure/Excessive blade gap	Adjust the reverse-blow pressure to 0.5 MPa and fine-tune the scraper gap to 0.8 mm.
Abnormal noise from the drum	Bearing oil shortage/foreign object ingress	Shut down the machine to inspect bearing lubrication, remove foreign objects, and replenish the specified lubricant.
Sudden power outage	Power grid failure	Manually release system pressure to flush residual material and prevent solidification blockages.

Stainless steel filter machines have become the preferred equipment for modern solid-liquid separation due to their continuous automation, high separation efficiency, excellent corrosion resistance, and hygienic properties. They are particularly well-suited for industrial applications with stringent requirements for product quality and production environments.

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