Belt Filter Press
Continuous Automatic Three-Stage Sludge Dewatering Machine for Wastewater Treatment & Solid-Liquid Separation
Belt Filter Press is a professional continuous automatic solid-liquid separation equipment designed for sludge dewatering and wastewater residue treatment. Adopting three-stage progressive dewatering technology including gravity drainage, low-pressure pre-pressing and high-pressure squeezing, it efficiently removes moisture from various industrial and municipal sludge. The fully automatic operation realizes uninterrupted feeding, dewatering and cake discharging, featuring high separation efficiency, low energy consumption and stable filter cake dryness. It is the core supporting equipment for standardized wastewater treatment and sludge reduction projects.
Anti-Deviation
No Blockage
Cost-Effective
What is Belt Filter Press?
In municipal sewage treatment, chemical industry, mining, food processing and papermaking industries, a large amount of wet sludge is produced during wastewater treatment. The raw sludge has high moisture content, fluid state and large volume, which is difficult for stacking, transportation and subsequent disposal. Traditional filter presses adopt intermittent operation with low efficiency, unstable dewatering effect, high operating energy consumption and frequent equipment failures, greatly increasing enterprise environmental protection and transportation costs.
Our Belt Filter Press breaks through the limitations of traditional intermittent filtration equipment. It adopts dual-filter-belt progressive squeezing structure and three-stage graded dewatering process. After flocculation conditioning, the sludge completes free water drainage, low-pressure shaping and high-pressure deep dewatering step by step. The whole process runs continuously and automatically, effectively reducing sludge moisture and volume. With stable operation, low failure rate and low operating cost, it has become the mainstream energy-saving and high-efficiency dewatering equipment for global industrial and municipal wastewater treatment projects.
Contents
Complete Equipment Composition of Belt Filter Press
1. Automatic Sludge Flocculation Conditioning System
Equipped with integrated medicament mixing and sludge conditioning device. It fully mixes sludge with flocculant to promote fine suspended particles to aggregate into large flocs, separating free water from sludge solids fundamentally. The variable-frequency feeding and dosing system intelligently adjusts the mixing ratio according to sludge concentration and flow rate, ensuring optimal flocculation effect and laying a foundation for efficient subsequent dewatering.
2. Gravity Dewatering Zone System (Primary Dehydration)
The conditioned flocculated sludge evenly spreads on the open filter belt. A large amount of free water in the sludge is naturally drained through the gap of the porous filter belt by gravity. This stage removes most of the surface free water, turning fluid sludge into solid mud layer, eliminating mud overflow and running loss, and greatly reducing the pressure of subsequent squeezing and dewatering.
3. Wedge Pre-Pressing Zone System (Low-Pressure Shaping)
The upper and lower filter belts gradually converge to form a wedge-shaped pre-pressing area. The sludge is gently squeezed at low pressure to discharge residual free water and tiny bubbles inside the mud layer. The mud layer is gradually compacted and shaped to avoid sludge splashing and layer disorder in the high-pressure area, ensuring uniform thickness and stable texture of the filter cake.
4. High-Pressure Squeezing & Shearing Dewatering System (Deep Dehydration)
The core dewatering module adopts multi-group diameter progressive compression rollers. The dual filter belts wrap the sludge and pass through the serpentine roller group. Gradually increasing extrusion pressure and horizontal shearing force squeeze out capillary water inside the sludge deeply. This three-stage progressive pressure rise mode avoids sudden pressure damage to filter cloth and ensures deep and uniform dewatering of sludge.
5. Intelligent Belt Deviation Correction & Tension Control System
Equipped with automatic pneumatic tensioning and infrared deviation correction device. It monitors the filter belt running state in real time, automatically adjusts belt tension and corrects deviation, effectively solving common problems such as belt deviation, wrinkling and damage. The system ensures long-term stable and synchronous operation of the upper and lower filter belts, reducing equipment failure rate and prolonging filter belt service life.
6. High-Pressure Belt Self-Cleaning System
Equipped with high-pressure circulating water cleaning device. After each dewatering cycle, the high-pressure water jet thoroughly washes the residual sludge particles on the filter belt, unclogging the filter holes completely. It prevents filter belt blockage and permeability decline, ensuring long-term stable filtration efficiency and avoiding frequent manual cleaning maintenance.
7. PLC Full-Automatic Control System
Presets professional dewatering parameter programs for different types of sludge. It intelligently linkage controls sludge feeding, dosing, belt running speed, water pressure and dewatering time. Equipped with overload protection, deviation alarm, blockage shutdown and fault self-diagnosis functions, realizing 24-hour unattended continuous automatic production.
Core Product Advantages of Belt Filter Press
1. Continuous Uninterrupted Operation, Ultra-High Efficiency
Different from intermittent working plate frame filter presses, this belt filter press realizes 24-hour continuous feeding, dewatering and cake discharging. No frequent start-stop and waiting cycle, the production efficiency is increased by more than 80% compared with traditional equipment, which perfectly meets large-scale and long-term sludge disposal demands of sewage plants and industrial enterprises.
2. Three-Stage Progressive Dewatering, High Dry Cake Rate
Adopts scientific gravity drainage, low-pressure pre-pressing and high-pressure deep squeezing graded dewatering process. It fully removes free water and capillary water in sludge. The moisture content of finished filter cake can be stably controlled at 60%-75%, realizing significant sludge volume reduction, greatly reducing subsequent transportation and incineration costs.
3. Intelligent Anti-Deviation Design, Stable Operation
The integrated pneumatic tensioning and infrared deviation correction system ensures synchronous and stable operation of dual filter belts. It effectively avoids common faults such as belt deviation, folding, damage and mud leakage of traditional belt presses. The equipment runs smoothly with low vibration and low failure rate, greatly reducing downtime loss.
4. Self-Cleaning Filter Belt, No Blockage & Long Service Life
Matching high-pressure circulating water self-cleaning system, the filter belt is always kept unobstructed with stable permeability. No manual frequent cleaning is required, solving the pain points of easy blockage, reduced efficiency and short service life of traditional filter belts. The later maintenance cost is extremely low, saving labor and time costs for enterprises.
5. Low Energy Consumption & Cost-Effective
The whole machine adopts energy-saving motor and optimized roller transmission structure, with low power consumption and high mechanical efficiency. Compared with hydraulic filter presses, it saves more than 40% of operating power consumption. The simple structure and few vulnerable parts greatly reduce daily operation and maintenance costs, with ultra-high cost performance.
6. Wide Adaptability & Environmental Compliance
It can adapt to dewatering of various complex sludges, including municipal sewage sludge, chemical sludge, mining tailings sludge, food sludge and papermaking sludge. The fully sealed operation avoids sludge and sewage leakage, no secondary pollution, fully complying with global environmental protection discharge standards for solid waste disposal.
Working Principle & Production Process of Belt Filter Press
Working Principle
The Belt Filter Press adopts three-stage progressive dewatering principle of gravity drainage + low-pressure pre-shaping + high-pressure shear squeezing. The diluted sludge is fully mixed with flocculant in the conditioning system to form dense flocculent aggregates. Then the sludge evenly enters the gravity dewatering zone, where a large amount of free water is naturally drained through the porous filter belt. After preliminary dehydration, the sludge enters the wedge pre-pressing zone for low-pressure shaping to avoid material disorder.
Finally, the dual filter belts wrap the sludge and pass through multiple groups of progressive diameter reduction rollers. The gradually increasing extrusion pressure and horizontal shearing force deeply squeeze out the internal capillary water of the sludge, realizing thorough solid-liquid separation. The dewatered dry filter cake is automatically discharged, and the filter belt is cleaned and recycled by the high-pressure self-cleaning system to complete continuous cyclic dewatering operation.
Standard Production Flow
Sludge Pump Feeding + Flocculant Dosing → Fully Mixing & Flocculation Conditioning → Gravity Free Water Drainage → Wedge Low-Pressure Pre-Pressing Shaping → Multi-Roller High-Pressure Deep Squeezing → Dry Filter Cake Automatic Discharging → Filter Belt High-Pressure Self-Cleaning → Cyclic Continuous Operation
Application Scenarios of Belt Filter Press
This high-efficiency Belt Filter Press is widely used in municipal sewage treatment plants, industrial wastewater treatment stations and solid waste disposal projects. It is suitable for dewatering treatment of various types of sludge, including urban domestic sewage sludge, chemical industrial sludge, mining tailings sludge, food processing sludge, papermaking sludge and printing and dyeing sludge. It can effectively reduce sludge volume, reduce environmental protection pressure and disposal costs, and realize harmless and reduction treatment of sludge waste.
Core Application Fields: Municipal wastewater treatment, industrial sewage sludge dewatering, mine tailings solid-liquid separation, food & paper mill sludge disposal, environmental protection sludge reduction projects
Real Project Cases of Belt Filter Press
Case 1: Municipal Sewage Sludge Dewatering Project | Philippines Urban Sewage Plant
Project Info: The customer needs long-term continuous dewatering of urban domestic sludge. Traditional equipment has low efficiency and high energy consumption. Our BP1500 belt filter press runs 24 hours continuously stably, stably controls filter cake moisture at 65%-70%, realizes 70% sludge volume reduction. The automatic operation greatly saves labor costs, meeting the daily large-scale sludge disposal demand of urban sewage plants.
Case 2: Chemical Industrial Sludge Treatment Project | Indonesia Chemical Park
Project Info: Industrial chemical sludge has complex components and high viscosity, which is easy to block traditional filter equipment. Our customized anti-blockage belt filter press with enhanced self-cleaning system solves the blockage problem thoroughly. The three-stage progressive dewatering ensures uniform dewatering effect, helping customers realize standardized harmless disposal of chemical sludge.
Case 3: Mining Tailings Dewatering Project | Malaysia Mineral Processing Plant
Project Info: The customer needs solid-liquid separation of tailings sludge for tailings dry stacking and water recycling. Our high-efficiency belt filter press realizes rapid dewatering of tailings sludge. The dry filter cake can be directly stacked and reused, and the separated clean water is recycled for production, greatly improving resource utilization rate and reducing project operating costs.
Technical Parameters of Belt Filter Press
| Model | NJDT1500 | NJDT2000 | NJDT2500 | NJDT3000 |
| Belt Width(mm) | 1500 | 2000 | 2500 | 3000 |
| Main machine power(kW) | 3.0 | 4.0 | 5.5 | 7.5 |
| Screen spray water pressure(HPa) | ≥0.5 | |||
| Compressed air consumption amount(㎡/min) |  0.3 | |||
| Compressed air pressure(bar) | 4.0 | |||
| Dimension L*W*H(mm) |
5180*2240*2280 | 5180*2640*2280 | 5180*3140*2280 | 5180*3640*2280 |
| Feeding material moisture(%) | 76-90% | |||
| Residue moisture (%) | 50-70% | |||
| Feeding material processing capacity(t/d) | Â 40-50 | Â 50-70 | Â 70-90 | Â 90-120 |
Get Custom Belt Filter Press Solution
Our Belt Filter Press breaks through the defects of traditional intermittent dewatering equipment, featuring continuous automatic operation, three-stage progressive deep dewatering, low energy consumption and stable cake dryness. It provides efficient, energy-saving and low-cost solid-liquid separation and sludge reduction solutions for global municipal sewage plants and industrial environmental protection enterprises, helping customers reduce disposal costs and meet environmental protection standards.
Contact us now to get free model selection, sludge-matched customized solution and accurate project quotation!
FAQs of Belt Filter Press
Q1: What types of sludge can the belt filter press handle?
A: It adapts to almost all common sludge types, including municipal domestic sewage sludge, chemical sludge, mining tailings sludge, food, papermaking, printing and dyeing industrial sludge. It supports parameter adjustment and customized configuration for different sludge characteristics.
Q2: What is the moisture content of the finished filter cake?
A: Under normal working conditions, the filter cake moisture can be stably controlled between 60%-75%. According to different sludge properties and flocculation effects, the moisture value can be adjusted appropriately to meet the requirements of sludge transportation, stacking and subsequent treatment.
Q3: What are the advantages compared with plate frame filter press?
A: Belt filter press supports 24-hour continuous automatic operation without intermittent waiting, with higher efficiency and lower energy consumption. It has automatic deviation correction and self-cleaning functions, lower failure rate and simpler operation and maintenance, which is more suitable for large-scale long-term sludge disposal projects.
Q4: Is the filter belt easy to block and damage?
A: Equipped with full-automatic high-pressure circulating water self-cleaning system, the filter belt is cleaned in real time during operation to prevent sludge residue and hole blockage. The high-strength polyester filter cloth is corrosion-resistant and wear-resistant, with long service life and low replacement cost.
Q5: Can the equipment realize unattended operation?
A: Yes. The PLC intelligent linkage control system presets professional operating parameters, realizing automatic feeding, dosing, dewatering, discharging and cleaning. It supports 24-hour unattended continuous operation with fault self-diagnosis and alarm functions.
