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   The main stacked spiral sludge dewatering machine is composed of a screw shaft, a helical blades to drive the screw axis rotation of the motor and is sleeved on the screw shaft is composed of a plurality of fixed outer ring and swimming ring cross arranged at intervals and filter device;;
    The leaves on the screw shaft drive, swim ring can rotate freely between two adjacent fixed ring and swing, formation pressure, complete sludge dehydration.
    Swimming ring gap automatic loose adjacent ring between the water flow channel in the work, to prevent the blockage of sludge.