Controlling characteristics of a pulp mat on a pulp washing surf

Details Controlling characteristics of a pulp mat on a pulp washing surf Controlling characteristics of a pulp mat on a pulp washing surf

1988-03-21

1989-06-20

Lacey, David L.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With testing, sampling or analyzing

162 50, 162 60, 162 61, 162DIG10, 8156, D21C 900

Patent

active

048407046

ABSTRACT:
Pulp washing efficiency at any given dilution factor and production rate is maximized by controlling washing surface speed in response to determination of total mass of product stream in weight per unit area on the surface and simultaneously controlling the rate of dilution liquid introduction in response to sensing of feed level in the container feeding the surface, thereby to obtain a substantially constant level of pulp in the feed and in the pulp mat formed on the washing surface which is to undergo washing and a substantially constant weight of pulp mat (on a dry pulp basis) per unit area on the washing surface.

REFERENCES:
patent: 4207141 (1980-06-01), Seymour
patent: 4732651 (1988-03-01), Lisnyansky et al.
patent: 4735684 (1988-04-01), Seymour
Perkins, J. K., "Brown Stock Washing Using Rotary Filters", Tappi Press, pp. 1-17, 19-23, 25-31, 33-37, 39-43, 45-51, 53-55.
Sande, W. E. et al., Tappi Journal, Mar. 1988, pp. 93-97.

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