Fluid handling – Processes
Patent
1988-07-01
1991-10-22
Chambers, A. Michael
Fluid handling
Processes
137550, 137565, 162380, 4151681, E03B 318
Patent
active
050586157
ABSTRACT:
A method and apparatus for pumping a liquid-fiber suspension, and specifically for pumping high consistency fiber suspensions in the pump and paper industry. The method of pumping a liquid-fiber suspension includes the moving of the suspension into a pump, separating a portion of the liquid part of the suspension from the liquid-fiber suspension during the pumping operation and directing the separated liquid to the suspension at a point somewhere between a situs in advance of the pump inlet and the pump outlet. This method is enabled by an apparatus, in which at least part of the surfaces of the pump (1) is provided with filter surfaces (6, 7, 8, 9, 10), through which the liquid separated from the suspension is returned either into the pump, directly in front of the suction opening (11) of the pump (1) or to some other suitable place in the vessel containing the suspension.
REFERENCES:
patent: Re29472 (1977-11-01), Kaiser
patent: 2306298 (1942-12-01), Curtis
patent: 2996187 (1961-08-01), Payne
patent: 3823063 (1974-07-01), Callahon et al.
patent: 4126513 (1978-11-01), Justus et al.
patent: 4316768 (1982-02-01), Goddard
patent: 4781529 (1988-11-01), Rose
Timperi Jukka
Vesala Reijo
Vikman Vesa
A. Ahlstrom Corporation
Chambers A. Michael
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