Belt Filter Press

The belt filter press is a solid-liquid separation device based on the principle of mechanical pressing. Its core consists of an annular filter belt, a roller pressing system with decreasing diameter, an intelligent deviation adjustment device, and a variable frequency drive module. It achieves efficient dehydration of sludge or slurry through the squeezing effect of the filter belt and the roller system.

Efficient dehydration
The belt filter press adopts a three-stage dehydration structure of gravity drainage → wedge pre-pressure, → high-pressure shearing to form a progressive dehydration effect.
• Gravity drainage device: Use a porous filter belt to quickly discharge free water, with a dehydration efficiency of about 30%-40%.
• Wedge pre-pressure device: The roller spacing decreases and gradually increases the pressure to discharge capillary water.
• High-pressure shearing device: The shear roller applies peak pressure (up to 1.5MPa) at a wrap angle of 180°, further reducing the moisture content of the filter cake to below 85%.
The three-stage synergy increases the daily processed dry matter mass by about 60% and shortens the dehydration cycle by about 50%.

Stable operation
The belt filter press integrates a tension sensor, a thickness monitor, and an offset controller to sense the operation status of the filter belt in real time and ensure stable operation.
• Tension sensor: Dynamically adjust the tightness of the filter belt (accuracy ±2%) to ensure that the thickness uniformity of the mud cake reaches more than 98%.
• Thickness monitor: Real-time feedback of mud cake thickness to optimize the distribution of pressing pressure.
• Offset controller: Automatically corrects filter belt deviation to reduce the risk of wear.
• Fault warning system: Identify more than 80% of potential faults in advance, and extend the trouble-free operation time (MTBF) to 8,000 hours.

Intelligent control
The belt filter press adopts a PLC control system, and can automatically adjust the filter belt speed and pressing pressure according to the feed concentration and flow rate to achieve precise control. It automatically enters low power consumption mode when unloaded, and reduces the overall energy consumption by about 35% through frequency reduction operation.

The operating principle of a belt filter press involves conditioning the feed sludge with a polyelectrolyte to facilitate flocculation. The flocculated sludge is then distributed onto an endless, horizontal porous filter belt where initial drainage occurs. As the sludge advances, a second filter belt is applied to sandwich the material, after which it undergoes further dewatering through a series of rollers with decreasing diameters. The final stage employs shear rollers arranged to provide a minimum 180-degree belt wrap, ensuring optimal pressure distribution and maximizing moisture removal efficiency.

• The above-mentioned treatment capacity is a reference value. According to the different properties of the sludge, the treatment capacity will be affected. For details, please consult our company when selecting models.

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