Imperforate bowl: centrifugal separators – Bowl and means external thereof for recirculating material
Patent
1987-02-20
1988-07-26
Jenkins, Robert W.
Imperforate bowl: centrifugal separators
Bowl and means external thereof for recirculating material
494 10, 494 38, B04B 1100
Patent
active
047597445
ABSTRACT:
In connection with recirculation of separated sludge to the separation chamber of a centrifuge separator there are normally flow restricting nozzles in the sludge outlets of the separation chamber. Only after all separated sludge has passed through these nozzles it is divided into one discharge flow and one recirculation flow.
The invention concerns a centrifugal separator with a recirculation circuit (27, 28, 33, 39, 41, 43, 32, 30, 29) for separated sludge, which is completely free of flow restricting nozzles. The amount of separated sludge, that is allowed to leave the centrifugal separator through the outlet conduit (39) without being recirculated, is determined by setting of valves (22, 40) in the stationary outlet conduits (21, 39) for sludge and clarified liquid, respectively.
REFERENCES:
patent: 3204686 (1965-09-01), Thomson
patent: 3494545 (1970-02-01), Nilson
patent: 3640452 (1972-02-01), Thylefors
patent: 3752389 (1973-08-01), Nilsson
patent: 4278200 (1981-07-01), Gunnewig
patent: 4300717 (1981-11-01), Latham
patent: 4643709 (1987-02-01), Lee
ALFA-Laval Separation AB
Jenkins Robert W.
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