Continuously and automatically functioning device for the draina

Details Continuously and automatically functioning device for the draina Continuously and automatically functioning device for the draina

1990-07-30

1992-06-16

Dawson, Robert A.

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Discharge of treated material

210182, 210202, 210298, 210415, 100117, 100145, 198625, 198661, 414218, B30B 914, C02F 1112

Patent

active

051222639

ABSTRACT:
A continuously and automatically functioning device for the drainage of sludge treated with a flocculent, especially of sewage sludge, comprising a screw conveyor installation with a driven conveyor screw consisting of shaft (16) and helix (17) and a screen wall (18). The screw conveyor installation possesses a first cylindrical area (10) of a large diameter and gap width followed by a conical area (12) for purposes of volume reduction in the throughput direction of the sludge. Connected to the conical area (12) of the screw conveyor installation is at least one pressure area (13) which, with the diameter of the shaft (16) being constant, possesses a decreasing lead of the conveyor helix (17) at the side of the entrance, and in its final area carries a conical piece (49) placed upon the shaft (16).

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patent: 4391561 (1983-07-01), Smith et al.
patent: 4415336 (1983-11-01), Stasi et al.
patent: 4871449 (1989-10-01), Lott

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