Method of and apparatus for optimizing the clarified phase and c

Details Method of and apparatus for optimizing the clarified phase and c Method of and apparatus for optimizing the clarified phase and c

1983-07-18

1984-10-09

Jenkins, Robert W.

Imperforate bowl: centrifugal separators

Bowl and means external thereof for recirculating material

494 10, 494 11, B04B 1100

Patent

active

044758979

ABSTRACT:
In a centrifuge of the type in which the solids are continuously discharged through nozzles, the nozzles are dimensioned to ensure that the volume of solids discharged from them is smaller than the volume of solids fed into the centrifuge through a feed line. The solids space in the centrifuge accordingly fills up gradually and, when it is full, the clarified phase begins to get turbid. The level of turbidity is determined by a photocell and the flow of clarified phase returned to the feed line through a diversion valve. Since the amount of liquid being fed into the centrifuge is maintained at a constant level, the volume of new liquid flowing into the centrifuge is decreased by an amount equal to the volume of clarified phase being recirculated. The volume of solids being fed into the centrifuge then decreases to below the level of the volume of solids that can be discharged from the nozzles until the solids retained in the drum are discharged with the maximum concentration of solids discharged from the nozzles being maintained. Once the level of turbidity decreases, the recirculation of the clarified phase is, preferably after a certain delay, terminated. The method ensures a constant maximum concentration of solids discharge and optimum clarification of the liquid phase at minimum automatic-control costs.

REFERENCES:
patent: 2532792 (1950-12-01), Svensjo
patent: 3623657 (1971-11-01), Trump
patent: 3750940 (1973-08-01), Nilsson
patent: 3752389 (1973-08-01), Nilsson
patent: 3893907 (1975-07-01), Canevari

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