Centrifugal dewatering machine
The decanter is mainly composed of a drum and a spiral pusher with a hollow shaft. After the sludge is fed into the drum by the hollow shaft, it is drilled immediately after the centrifugal force generated by the high-speed rotation is several thousand times larger than the gravity Inside the drum cavity. The proportion of sludge particles is large, and the centrifugal force is also large, and is discarded on the inner wall of the hub to form a solid layer. The water density is small and the centrifugal force is small, and only the liquid layer is generated inside the solid layer. The solid layer of sludge in the spiral pusher slowly pushed, was transported to the drum of the cone, the drum out of the continuous discharge of the mud, the liquid from the outlet overflow to the drum, the collection after the discharge of dehydration machine.
Decanter centrifugal dewatering machine features: small footprint, simple operation, continuous operation, high degree of automation, less pollution of the working environment, the operator's labor intensity is small; decanter centrifugal dehydrator affected by the impact of sludge fluctuations Small, because the centrifugal force is very large, so the sludge pretreatment (flocculation) is not demanding, therefore, can choose a smaller molecular weight flocculant and the amount of small, low operating costs.
Centrifugal dewatering technology in recent years has made great progress, especially some foreign advanced technology, such as Sweden AlfaLayal company, Germany FlOwttwey company, the United States sharples company, Japan Ishikawa grinding company, such as the production of spiral centrifugal dewatering machine, The mud cake with solid rate of up to more than 30 percent, continuous operation, stable and reliable, the slurry can be concentrated without a high degree of automation; and the operation is in a fully enclosed environment, the dehydration machine around no sludge and sewage There is no smell, can greatly improve the operating environment of the staff, which by the industry's favor, with great market potential.
 
 2. Belt filter dewatering machine
Belt filter press is from the upper and lower tension of the filter belt with a layer of mud, from a series of regular arrangement of the roller cylinder was S-shaped, relying on the tension of the filter itself to form the sludge layer of the squeeze and Shear force, continuous operation, the sludge layer of water squeezed out, in order to achieve sludge dewatering.
Belt filter press is affected by the fluctuation of sludge load. When the sludge load is large, the sludge will overflow from both sides of the filter belt and pollute the site. After the operation of the filter belt into the lower part, a large amount of water recoil Adhesion to the filter on the sludge, so that it does not plug the filter belt pores, because the belt filter dewatering machine for the open work, the work environment pollution, water consumption is also large; belt filter dewatering machine The operation is more cumbersome, the process of running the filter belt is often deviation, filter belt wear is also larger, need to timely adjust and replace the new filter belt, therefore, the management control is relatively complex, the operation of the operator's high quality requirements; Sludge pretreatment (flocculation) requires a higher, high molecular weight flocculant and the amount of large, therefore, expensive, high cost.
                         
 3. Plate and frame pressure filter dewatering machine
 Plate and frame filter press is squeezed through the frame, so that the sludge within the sludge through the filter cloth to achieve the purpose of dehydration. It is mainly composed of concave human filter plate, frame, automatic - pneumatic closing system side plate suspension system, filter plate vibration system, air compression device, filter cloth high pressure washing device and the fuselage side photoelectric protection device and so on. Equipment selection, should consider the following aspects:
(1) the requirements of the solid rate of mud cake. General plate and frame filter press Compared with other types of dehydration, mud cake with the highest solid rate of up to 65 percent, if the sludge from the reduction of land occupation factors, plate and frame filter press should Is the preferred option.

(2) filter plate and filter cloth material. Requiring corrosion resistance, with a certain tensile strength, compressive strength.

(3) the movement of the filter plate. Requirements can be completed by hydraulic or pneumatic automatic or semi-automatic to reduce the labor intensity of the operator.

(4) the operation of workers labor intensity, covers an area of large, site pollution, filter cloth, filter plate loss, low production efficiency.