Pump with separate fluidizing vaned shaft adjacent impeller

Details Pump with separate fluidizing vaned shaft adjacent impeller Pump with separate fluidizing vaned shaft adjacent impeller

1989-07-18

1990-12-11

Kwon, John T.

Rotary kinetic fluid motors or pumps

Plural runners having different type flow paths

415 62, 415 68, 55199, 55203, 55409, 162 52, 366294, F04D 110

Patent

active

049765868

ABSTRACT:
A pumping system is capable of handling a paper pulp suspension of medium consistency (e.g. about 8-15% solids consistency) utilizing a conventional centrifugal pump. A conventional pump system capable of handling 3-8% consistency pulp may be retrofit to handle 8-15% consistency pulp. A tube with vanes, and having an open end, extends through the inlet to the pump so that there is a small clearance between the vanes and the inlet, and so that the open end is adjacent but spaced from the hub of the pump impeller. A gas passage extends from the hollow interior of the tube to an area remote from the pump. The tube is rotated in a direction of rotation opposite to the direction of rotation of the pump impeller, and at a speed sufficient to fluidize pulp of about 8-15% consistency, and to force the pulp toward the pump. Gas which collects at the pump impeller is withdrawn through the tube and a gas passage in a shaft connected to the tube, and for that purpose a vacuum pump may be utilized.

REFERENCES:
patent: 3164330 (1965-01-01), Neidl
patent: 4093506 (1978-06-01), Richter
patent: 4435193 (1984-03-01), Gullichsen et al.
patent: 4531892 (1985-07-01), Nasman et al.
patent: 4637779 (1987-01-01), Sherman et al.
patent: 4770604 (1988-09-01), Luthi et al.
patent: 4826398 (1989-05-01), Gullichsen
patent: 4884943 (1989-12-01), Niskanen
A. S. Myrens Verksted Brochure.
"Handbook for Pulp & Paper Technologists", Smook et al.; TAPPI; Canadian Pulp & Paper Assn., pp. 111-113.

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