Liquid treatment apparatus

Liquid purification or separation – Recirculation – Serially connected distinct treating or storage units

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Details

210197, 210528, B01D 1904, C02B 110

Patent

active

043929559

ABSTRACT:
In liquid sedimentation and clarification apparatus recirculation of previously settled solids is controlled without affecting the volume or rate of flow of incoming untreated liquid. A throttle plate is placed above an updraft tube in the liquid flow path. Movement of the throttle plate toward or away from the end of the updraft tube alters the quantity of settled solids that are mixed with the incoming liquid during the treatment process.

REFERENCES:
patent: 2090384 (1937-08-01), Durpin
patent: 2346366 (1944-04-01), Durpin
patent: 2695710 (1954-11-01), Gibbs
patent: 3227278 (1966-01-01), Johnson
patent: 3397788 (1968-08-01), Duff et al.
patent: 3415378 (1968-12-01), Fukuda
patent: 3473661 (1969-10-01), Duff
patent: 3473665 (1969-10-01), Duff
patent: 3865721 (1975-02-01), Kaelin
patent: 3929640 (1975-12-01), Dohnert
patent: 3951806 (1976-04-01), Young

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