Gas separation control in a centrifugal pump vacuum pump

Details Gas separation control in a centrifugal pump vacuum pump Gas separation control in a centrifugal pump vacuum pump

1997-01-17

1998-12-01

Freay, Charles G.

Pumps

Diverse pumps

Including rotary nonexpansible chamber type

417 53, 417 69, 415143, 4151691, F04B 2314, F04C 1900

Patent

active

058428330

ABSTRACT:
A centrifugal and vacuum pump combination in which the impeller of a centrifugal pump is disposed on the same shaft as a rotor of the vacuum pump, with a gas outlet extending between the centrifugal and vacuum pumps, is operated by positively controlling the flow of gas passing through the gas outlet duct, for example by changing the effective cross-sectional flow area of the outlet duct. The fluent material handled by the pump is preferably a cellulose fiber slurry having a solids consistency of between about 6-15%. The control can be effected automatically in response to solids consistency, inlet pressure, and/or gas content of the slurry being pump. The vacuum pump housing includes an eccentric inner wall, and operation of the pump may be primarily controlled by moving the vacuum pump housing.

REFERENCES:
patent: 3050008 (1962-08-01), Pacey et al.
patent: 4776758 (1988-10-01), Gullichsen
patent: 4921400 (1990-05-01), Niskanen
patent: 4981413 (1991-01-01), Elonen et al.
patent: 5078573 (1992-01-01), Peroaho et al.
patent: 5114310 (1992-05-01), Haavik et al.
patent: 5116198 (1992-05-01), Vesala et al.
patent: 5151010 (1992-09-01), Vesala et al.
patent: 5152663 (1992-10-01), Peroaho et al.
patent: 5366347 (1994-11-01), Hoglund

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