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Dewatering and self-cleaning process of volute dewatering press

Jan 30, 2019

The volute dewatering press belongs to the screw press dewatering machine, which can reduce the sedimentation tank and the sludge concentration tank and save the construction cost of the sewage station. The volute dewatering press uses the automatic update filter cake filtration technology instead of the traditional filter screen filtration, and the self-renewing filter cake filtration technology ensures the continuous and stable mud-water separation effect of the dehydrator.


The snail dewatering machine is a new type of solid-liquid separation equipment by the strong squeezing force generated by the change of the screw diameter and the pitch and the small gap between the swimming ring and the fixed ring to realize the extrusion and dewatering of the sludge. When the screw pushes the shaft to rotate, the multiple solid laminations disposed on the periphery of the push shaft move relatively, and under the action of gravity, water is filtered out from the relatively moving lamination gap to achieve rapid concentration.


The concentrated sludge in the dewatering process of the stacking screw decanter moves forward with the rotation of the screw shaft; along the exit direction of the mud cake, the pitch of the screw shaft gradually becomes smaller, and the gap between the ring and the ring also becomes smaller, the spiral The volume of the cavity is continuously shrinking; under the action of the back pressure plate at the outlet, the internal pressure is gradually increased. Under the continuous driving of the screw pushing shaft, the water in the sludge is squeezed out, and the solid content of the filter cake is continuously increased. Continuous dewatering of the sludge is achieved.


The rotation of the screw shaft of the volute dewatering press pushes the swimming ring to rotate continuously. The device relies on the movement between the fixed ring and the swimming ring to realize a continuous self-cleaning process, thereby cleverly avoiding the clogging problem common to the traditional dewatering machine.