Product Overview
The Linzhen Multi-plate Screw Press Sludge Dewatering Machine (Model 302) is an advanced screw-type sludge dehydrator developed by Qingdao Linzhen Environment Project Co., Ltd. with over 21 years of industry expertise. Engineered for superior solid-liquid separation, this equipment fundamentally outperforms conventional belt presses, centrifuges, and plate-and-frame filter presses. The main body consists of a precision filter device formed by the mutual stacking of fixed rings and moving rings, with a spiral shaft running through the entire assembly to create continuous thickening and dewatering action.
Working Principle
The dewatering process operates through a two-stage continuous mechanism within a fully enclosed system that ensures environmental containment and operational safety.
Stage 1: Gravity Thickening Zone
When the spiral shaft is driven by the precision reduction gearbox, the moving rings around the shaft move relatively up and down in a continuous self-cleaning motion. Conditioned sludge entering the thickening zone undergoes preliminary dewatering as free water is pushed out through the precision gaps between the fixed and moving rings. Most of this water falls into the integrated filtrate pool due to gravity, significantly reducing the sludge volume and increasing solids concentration before mechanical compression begins.
Stage 2: Mechanical Squeeze Dewatering Zone
The concentrated sludge moves continuously from the thickening area into the dewatering zone. As the pitch of the screw shaft thread becomes progressively narrower along the length of the chamber, the pressure within the filter chamber becomes higher and higher. A back pressure plate at the discharge end generates substantial counter-pressure. The combined action of these forces greatly presses the sludge, producing consistently formed sludge cakes that discharge automatically from the sludge outlet port under the continuous propulsion of the screw shaft.
Continuous Self-Cleaning Action
The unique relative motion between the fixed rings and moving rings creates automatic self-cleaning with every rotation of the shaft. This eliminates the need for traditional filter cloth replacement and prevents blockage even when processing oily or fibrous sludge that would rapidly clog conventional dewatering equipment.
Core Advantages
Clogging-Free Self-Cleaning Design
The movable ring assembly replaces traditional press cloth media entirely. The continuous relative up-and-down motion between fixed and moving rings creates automatic self-cleaning action during normal operation, completely preventing blockage and making the equipment exceptionally capable of handling oily sludge that challenges conventional systems.
Superior Energy Efficiency
The screw shaft operates at very low rotational speed through the precision reduction gearbox, requiring significantly less electrical power than high-speed centrifuge alternatives or continuously running belt press systems. This translates to dramatically reduced electricity consumption and lower overall operating expenses throughout the equipment lifecycle.
Wide Application Range
The Model 302 effectively processes diverse sludge types including municipal sewage biosolids, industrial wastewater residues from printing, dyeing, papermaking, chemical processing, pharmaceutical manufacturing, and electroplating operations, food processing byproducts, construction drilling mud, river and reservoir sediment, and challenging oil-containing sludge from petroleum and automotive industries.
Simple Operation and Minimal Maintenance
The fully automatic PLC-controlled system enables continuous operation with minimal operator intervention. Fewer moving parts compared to alternative dewatering technologies reduce mechanical wear, maintenance frequency, and spare parts inventory requirements while extending operational service life.
Stable and Reliable Process Performance
Precision-engineered components manufactured from corrosion-resistant SUS304 stainless steel ensure consistent dewatering efficiency and good filtrate water quality. The integrated reduction gearbox and electric drive system deliver smooth, reliable power transmission under demanding continuous-duty conditions.
Compact and Easy Installation
The integrated monobloc structural configuration occupies minimal installation footprint compared to conventional dewatering equipment with equivalent capacity. This makes the Model 302 particularly suitable for retrofitting existing wastewater treatment facilities or installations where spatial constraints limit equipment options.
Technical Specifications
| Attribute |
Specification |
| Product Name |
Multi-plate Screw Press Sludge Dewatering Machine |
| Brand |
Linzhen |
| Model |
302 |
| Primary Function |
Sludge Thickening & Dewatering |
| Application Scope |
Municipal & Industrial Wastewater Sludge Treatment |
| Processing Capacity |
Up to 3,000 L/h |
| Operation Mode |
Fully Automatic (PLC Control) |
| Construction Material |
SUS304 Stainless Steel |
| Core Components |
Precision Reduction Gearbox, Spiral Shaft, Fixed Rings, Moving Rings, Electric Motor, Control System |
| Screw Shaft Speed |
Ultra-Low Speed (Variable) |
| Electrical Supply |
380V / Customizable to Local Standards |
| Quality Certification |
CE Marking, ISO9001, EUROTEST |
| Standard Warranty |
1 Year |
| After-Sales Support |
Video Technical Support, Remote Diagnostics, On-site Service Available |
| Minimum Order Quantity |
1 Set |
| Customization |
Available per Client Drawings and Specifications |
Product Details and Construction Features
Spiral Shaft Rotary Plate Assembly
The precision-manufactured spiral shaft incorporates stacked fixed rings and moving rings that form the core filtration and compression chamber. The movable ring design replaces traditional disposable press cloth, enabling continuous self-cleaning operation without blockage. This innovative architecture makes the equipment exceptionally capable of handling oily sludge and grease-laden materials that would rapidly compromise conventional belt press or filter press systems.
Precision Reduction Gearbox
The heavy-duty reduction gearbox delivers smooth, reliable torque transmission to the spiral shaft at ultra-low operating speeds. After full dehydration is achieved, the dry mud cake is discharged consistently from the discharge port under the steady propulsion of the screw shaft. The gearbox is engineered for continuous-duty operation with minimal maintenance requirements.
Easy Installation and Stable Performance
The integrated structural design ensures stable and reliable process performance with good filtrate water quality. The compact footprint simplifies installation in both new construction and retrofit applications, reducing civil engineering costs and shortening commissioning timelines.
Flushing and Dosing System
The integrated flushing device and precision dosing nozzles ensure optimal polymer conditioning of incoming sludge and automatic cleaning of the filtration gaps. The overflow nozzle, vent nozzle, and rinse water inlet are strategically positioned for efficient operation and maintenance access.
Application Scenarios
Municipal Sewage Treatment Facilities
The Model 302 efficiently processes domestic sewage sludge, municipal pipe network cleaning residues, wastewater treatment plant residual activated sludge, and septic tank pumpage. The equipment enables municipalities to achieve required solids content for landfill disposal, agricultural utilization, or further thermal processing.
Industrial Wastewater Treatment Plants
Specialized applications include sludge dewatering from textile printing and dyeing facilities, pulp and papermaking mills, petrochemical processing plants, pharmaceutical manufacturing operations, metal electroplating facilities, leather tanning processors, and electronics manufacturing cleanrooms. The clogging-free design handles industrial sludge with high oil and grease content that defeats conventional equipment.
Food & Beverage Processing Industry
Effective treatment of organic residues from food production facilities, intensive aquaculture operations, poultry and livestock slaughterhouse wastewater, dairy processing plants, brewing and distillation facilities, and vegetable oil extraction operations.
Environmental Remediation and Specialized Projects
Construction site drilling mud dewatering, river and lake sediment remediation projects, landfill leachate treatment residuals, kitchen waste and food scrap slurry processing, oil-containing sludge from petroleum refineries and automotive service facilities, and hazardous waste stabilization preprocessing.
About Qingdao Linzhen Environment Project Co., Ltd.
Qingdao Linzhen Environment Project Co., Ltd. was established in 1988 as a professional manufacturer dedicated to environmental protection equipment. Our state-of-the-art manufacturing facility encompasses 27,000 square meters of production space with over 80 advanced production lines. The company maintains an experienced team of more than 90 staff members, including specialized product designers and manufacturing engineers.
Our comprehensive product portfolio includes almost 20 varieties across 10 series, including MBBR sewage treatment plants, MBR sewage treatment plants, dissolved air flotation systems, lamella clarifiers, sludge dewatering machines, filter press machines, belt filter press machines, and plate filter press machines.
The company holds ISO9001 Quality Management System certification, CE marking for European market access, and EUROTEST attestation of conformity. Our intellectual property portfolio includes multiple utility model patents. Manufacturing technologies include laser and plasma cutting, automatic welding, CNC cutting and bending, ensuring precision and consistency in every unit.
Pre-Sale and After-Sale Services
Comprehensive Pre-Sale Support
Inquiry and consulting support, 3D design support and layout planning services, sampling check and pilot testing coordination, factory visiting arrangements, and timely reply to all information requests with detailed quotations.
Dedicated After-Sale Support
Complete installation instruction manuals and technical documentation, operation demonstration videos and comprehensive training materials, technical support via telephone and email, video technical assistance for troubleshooting, on-site installation supervision and commissioning services available globally, and expedited spare parts procurement through our international branch network.
Anti-Corrosion Protection
We use world-famous paint systems including SigmaCoatings and PainBow, applied strictly according to international standards, to ensure long-term corrosion resistance in aggressive operational environments.
Flexible Payment Terms
TT and L/C are both acceptable payment methods. Standard terms are 30% deposit before production and 70% balance before loading by shipment.
Delivery and Packaging
Delivery time depends on order quantities, generally within 4 to 6 weeks. We use standard export packaging suitable for international shipment. Special packaging requirements can be accommodated as needed.
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