Combined sand and liquor separation for chip transport in pulp processing
OwnerJohn F. Bolles, Keith P. Vogel +1inventors
InventorsJohn F. Bolles, Keith P. Vogel, Erkki Pulkkinen
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Abstract
A separation device is disclosed for a cellulose fiber processing system comprising: a particle separation tank having an axis, an upper tangential stream inlet, and a lower particle outlet; an inline drainer column extending at least partially down into the tank and said drainer, wherein the drainer has an inlet within the tank and aligned with the axis of the tank, and the drainer has a clear fluid outlet and an outlet for a mixture of fluid and cellulose fiber.
Claims14
A separation device for a cellulose fiber processing system comprising:
- a particle separation tank having an axis, an upper tangential stream inlet, and a lower particle outlet;
- an inline drainer column extending at least partially down into the tank and said drainer, wherein the drainer has an inlet within the tank and the inlet aligned with the axis of the tank, and the drainer has a clear fluid outlet and an outlet for a mixture of fluid and cellulose fiber.
A method for separating particles and clear fluid from a stream of liquor in a cellulose fiber processing system, wherein said method uses a device having a tank and a drainer column extending down into the tank, said method comprising:
- a. injecting the stream of liquor into an upper inlet to the tank;
- b. swirling the liquor in the tank such that centrifugal forces move particles towards a perimeter of the tank and away from a centerline of the tank;
- c. collecting the particles in a lower portion of the tank;
- d. introducing relatively particle free cooking liquor into an inlet to the drainer, where the drainer inlet is within the tank and substantially aligned with the centerline of the tank;
- e. in the drainer filtering to separate clear liquor for the relatively particle free liquor which includes cellulose fibers and thereby form condensed relatively free particle free liquor;
- f. passing the clear liquor through a clear liquor output of the drainer, and
- g. passing the condensed relatively particle free liquor to an outlet.
Dependencies are inferred from the claim text.