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Laminated sludge dehydrator
Laminated sludge dehydrator

1.1 purpose of equipment
The double screw type sludge dehydrator is suitable for solid-liquid separation of materials in sewage treatment plant, food, pharmaceutical, chemical, petrochemical, papermaking, metallurgy, printing and dyeing, livestock and poultry industries. It is mainly used for further dehydrating concentrated sludge (moisture content 95-97%) or low concentration sludge (moisture content 99.7% - 97%) into mud cake (moisture content 30-85%) in sewage treatment process.
1.2 working principle

The main body of the dehydrator is mainly composed of a filter body and a spiral shaft, and the filter body is composed of a concentration part and a dehydration part. Therefore, when the sludge enters the filter body, the relative movement of the fixed ring and the traveling ring is used to make the filtrate quickly discharge out through the lamination gap, quickly concentrate, and the sludge moves towards the dehydration part. When the sludge enters the dehydration part, the space in the filter chamber is continuously reduced, and the internal pressure of the sludge is continuously increased. In addition, the back pressure of the pressure regulator at the sludge outlet makes it achieve the purpose of efficient dehydration, At the same time, sludge is continuously discharged out of the machine.
1.3 work and process of dehydrator
(1) First, the sludge raw liquid is input into the "V" metering tank of the dehydrator through the sludge pump, and part of it is returned to the sludge raw liquid tank, and the measured sludge enters the flocculation tank.
(2) The sludge enters into the flocculation and mixing reaction tank, the chemical injection pump injects the flocculant, the two solutions are fully mixed, the reaction forms large alum, and then flows into the filter body, which is driven by the frequency conversion motor.
(3) The sludge flowing into the filtration body enters the concentration section first, quickly separates a large number of flocculation sludge and water, and then pushes the sludge to the dehydration section.
(4) In the dehydration section, the relative movement of the fixed ring and the floating ring and the continuous increase of the pressure in the filter chamber are used to achieve the purpose of efficient dehydration, and the sludge is continuously discharged from the outside of the machine.
1.4 technical characteristics
The series products of screw type sludge dehydrator have the following characteristics:
1. No clogging, easy treatment of oily sludge.
2. Simple operation and management, fully automatic operation, unattended.
3. It can be applied to a wide range of sludge concentration, up to 2000-50000mg / L.
4. Small size, full function, water saving and energy saving.

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