Presses – With drain means for expressed liquid – Drainage through or along pressure surface
Patent
1977-03-16
1979-03-20
Feldman, Peter
Presses
With drain means for expressed liquid
Drainage through or along pressure surface
100154, 210400, B30B 924
Patent
active
041448073
ABSTRACT:
There is disclosed a device for dewatering sludge such as residuals in sewage discharge processing installations. The device provides that cakes are formed of the sludge. These cakes have initially a high water content and are of non-homogenous, loose consistency. They are guided between filter bands through a preliminary filtering zone in which some of the water contained in the cakes is extracted by straining and pressure action applied thereto. The filter bands with the cakes therebetween are then successively guided over a first dewatering drum and a subsequent second dewatering drum. Pressure is applied to the filter band while being guided about the drums, thereby extracting further water from the cakes. Additionally, the cakes while traveling from the feed-in point toward and through pressure zones are deformed and also turned over thereby compacting the cakes as water is extracted therefrom. Finally, the cakes after being sufficiently dewatered and compressed are discharged.
REFERENCES:
patent: 1241905 (1917-10-01), Behr
patent: 3315370 (1967-04-01), Hikosaka
patent: 3446139 (1969-05-01), Coffelt
patent: 3743100 (1973-07-01), Bahr
patent: 3906853 (1975-09-01), Wohlfarter
Alb. Klein KG
Feldman Peter
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