The Double-Net Belt Filter Press stands as a core technological solution in modern industrial dewatering, highly regarded for its exceptional efficiency and stable continuous operation. Serving as a pivotal component in solid-liquid separation processes across the papermaking, mining, and environmental protection industries, this equipment efficiently transforms slurry materials such as pulp, sludge, and mineral tailings into high-solid-content filter cakes. It provides a reliable solution for resource recovery, reuse, and waste volume reduction.

Application Fields

In the papermaking industry, it is used for the efficient dewatering of various pulps, such as waste paper pulp and chemi-mechanical pulp.

In the sand washing and mining sectors, the equipment effectively processes tailings, mineral concentrates, and washing slurry.

In environmental engineering, it is the preferred equipment for the volume reduction treatment of municipal and industrial sludge. The dewatered sludge cake lays the foundation for subsequent landfill, incineration, or resource recovery processes.

Working Principle

The dewatering process of the equipment is based on a continuous and precise mechanical pressing principle. The slurry first enters the Gravity Drainage Zone, where free water rapidly separates from the flocculated and conditioned material on two parallel running filter belts under gravity. The material then proceeds to the Wedge Press Zone, where the gradually converging belts apply a smoothly increasing compressive force, initially forming a filter cake. Finally, it reaches the core High-Pressure Shear Zone. Here, the material passes through multiple press rollers arranged in an “S” configuration, subjected to intense surface pressure and shearing forces converted from the belt tension. This deeply removes capillary and bound water, ultimately forming a firm filter cake with extremely low moisture content.

Core Functions

The Automatic Belt Tracking System is a guarantee of stable operation. This system continuously monitors the belt position via sensors and automatically triggers a correction mechanism upon any deviation, effectively preventing wear and downtime caused by belt misalignment.

The Pneumatic Constant Tension Control System ensures uniform dewatering results. It maintains a constant and optimal tension across the entire working surface of the filter belts through precision cylinders. This is key to ensuring stable pressure in each dewatering zone and consistent cake dryness.

The Fully Automatic PLC Integrated Control System enables intelligent management. Users can easily set and monitor all operating parameters via a touchscreen interface, achieving fully automated control and data logging for the entire process, from feeding and chemical dosing to pressing and belt washing.

Technical Advantages

It boasts outstanding dewatering efficiency and dryness. Through an optimized multi-stage pressing process, the filter cake can achieve the tangible result of “no water released when squeezed by hand” (solid content typically reaching 25%-45%), significantly reducing subsequent disposal or transportation costs.

It demonstrates exceptionally high operational stability. Benefiting from core functions like automatic tracking and constant tension control, the equipment can meet the demands of 24/7 continuous production, with a long mean time between failures, ensuring production continuity.

It offers clear advantages in energy consumption and operational costs. Its main power consumption is concentrated on the drive motor. Its simple structure facilitates easy maintenance, providing clients with a high return on investment and long-term value.

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