1、 Introduction to sludge dewatering machine
After sedimentation treatment, sewage will produce a large amount of sludge. Even after concentration and digestion treatment, the moisture content is still as high as 96%, with a large volume that is difficult to digest and dispose of. Dehydration treatment is necessary to increase the solid content of the sludge cake and reduce the footprint of sludge stacking.
2、 Classification of sludge dewatering machines
Generally, large and medium-sized sewage treatment plants adopt mechanical dehydration. There are many types of dehydrators, which can be divided into three categories according to the dehydration principle: vacuum filtration dehydration, pressure filtration dehydration, and centrifugal dehydration.
1. Belt filter press sludge dewatering machine
The belt filter press dewatering machine is composed of two tensioned filter belts carrying the sludge layer, which pass through a series of regularly arranged roller drums in an S-shape. By relying on the tension of the filter belt itself, it forms a squeezing and shearing force on the sludge layer, squeezing out the capillary water in the sludge layer and obtaining a sludge cake with high solid content, thereby achieving sludge dewatering.
2. Centrifugal sludge dewatering machine
The centrifugal dewatering machine is mainly composed of a transfer and a screw conveyor with a hollow shaft. After the sludge is sent into the rotating drum by the hollow shaft, it is immediately thrown into the hub cavity under the centrifugal force generated by high-speed rotation. The proportion of sludge particles is relatively high, resulting in a large centrifugal force that is thrown onto the inner wall of the hub, forming a solid layer; The water density is low, and the centrifugal force is also small, only producing a liquid layer inside the solid layer. The sludge in the solid layer is slowly pushed by the screw conveyor and transported to the cone end of the transfer machine. It is continuously discharged through the outlet around the transfer machine, while the liquid is discharged outside the transfer machine through the overflow of weir four, collected and discharged from the dewatering machine.
3. Plate and frame filter press sludge dewatering machine
The plate and frame filter press uses the compression of the plate and frame to discharge the water inside the sludge through the filter cloth, achieving the purpose of dewatering. It mainly consists of a concave filter plate, a frame, an automatic pneumatic closure system, a measuring plate suspension system, a filter plate vibration system, an air compression device, a filter cloth high-pressure flushing device, and a photoelectric protection device on one side of the machine body.
3、 Characteristics of sludge dewatering machine:
1. The sludge dewatering machine operates automatically, saves manpower, and is easy to maintain and manage.
2. Excellent mechanical performance, good durability, and occupies a small area.
3. The sludge dewatering machine is suitable for various types of sludge dewatering, with high efficiency and large processing capacity.
4. Multiple dewatering, strong dewatering ability, low moisture content of sludge cake.
5. The sludge dewatering machine saves energy, consumes less electricity, operates at low speed, and has no vibration or noise.
6. The belt filter cloth operates continuously, automatically cleans, and is easy to operate.
7. The filter cloth of the sludge dewatering machine is automatically calibrated for snake movement, and the operation is smooth.
8. The filter cloth is easy to install and exchange, and easy to maintain.
9. The sludge dewatering machine has a low dosage of chemicals, low operating costs, and reasonable prices.

Technical parameters of sludge dryer: