Dewatering extruder

Details Dewatering extruder Dewatering extruder

B - Operations, Transporting

30

B

B30B 9/06 (2006.01)

Patent

CA 2059674

APPARATUS FOR EXTRACTING LIQUID FROM A COMPOSITE MASS ABSTRACT OF THE DISCLOSURE An apparatus for removing liquid from a composite mixture of liquid and solids comprising a hopper 16 mounted atop a compactor ram assembly 10, having a snout section 12 and an extruder section 14 mounted in a generally axial direction to the compactor ram assembly 10. Wet waste material is loaded into the hopper 16 and falls onto a loading floor 158. A hydraulically operated ram 208 compresses the wet material into the snout and extruder sections 12, 14. Under pressure from the ram 208, liquid in the waste material escapes from numerous drainage holes 25 in the loading floor, the snout section top, bottom and sides 24, 22, 20, the extruder section top, bottom and sides 30, 28, 26 and holes 212 in the ram face 210. A platen 80, pivotally mounted to the extruder top plate 30 near the exit of the device and biased with a constant pressure, controls the back pressure in the extruder and snout sections 14, 12. A first embodiment has a converging extruder section 14, having a narrower cross section at the exit of the section, which aids in compacting the material being dewatered. A second embodiment has a slightly diverging extruder section to prevent impaction of dewater material inside the device when operating with certain composite mixtures such as paper pulp. -23-

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