Thickener

Details Thickener Thickener

1990-12-19

1992-09-15

Hruskoci, Peter

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210801, 210127, 210129, 2101951, 210207, 210519, B01D 2124

Patent

active

051475561

ABSTRACT:
A thickener for liquids or pulps includes a tank in which flocculation takes place. A feedwell for feed liquid is disposed within the tank and has a restricted bottom opening in fluid communication with the tank. The bottom opening has an effective cross-sectional flow area substantially less than the mean cross-sectional area of the feedwell to restrict the flow of liquid between the tank and the feedwell through the bottom opening and thereby promote homogeneous mixing of the feed liquid within the feedwell. A conduit supplies feed liquid to the feedwell. An aperture is formed in the feedwell or the conduit above the bottom opening and below the upper marginal edge of the feedwell to permit the recirculation of dilute liquid directly from the tank through the aperture and into the feed liquid when the surface level in the tank is higher than the surface level in the feedwell to provide for autogenous dilution of the feed liquid.

REFERENCES:
patent: 1344370 (1920-06-01), Allen
patent: 1452016 (1923-04-01), Allen
patent: 1472317 (1923-10-01), Allen
patent: 2528094 (1950-10-01), Walker
patent: 2678730 (1954-05-01), Coulter
patent: 3532218 (1970-10-01), von Blottnitz et al.
patent: 3926805 (1975-12-01), Walker
patent: 4267052 (1981-05-01), Chang
patent: 4293416 (1981-10-01), Keoteklian
patent: 4357242 (1982-11-01), Chandler
patent: 4541850 (1985-09-01), Oda et al.
patent: 5015392 (1991-05-01), Taylor

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