Process for controlling the addition of retention aids in paperm

Details Process for controlling the addition of retention aids in paperm Process for controlling the addition of retention aids in paperm

1989-06-14

1990-08-28

Alvo, Steve

Paper making and fiber liberation

Processes and products

With measuring, inspecting and/or testing

162253, 162DIG11, D21C 706

Patent

active

049522809

ABSTRACT:
The maximum amounts of the retention-influencing variable stock components which can be added are determined as a function of a predetermined degree of flocculation and typical values of the stock suspension with the aid of a mathematical relationship, and control signals for metering retention aids are derived from the amounts so that the greatest possible retention can be achieved without exceeding a set-point for the degree of flocculation.

REFERENCES:
patent: 4752356 (1988-06-01), Taggert et al.
Masse et al.; "Most Modern Stock Preparation Features Complex Blending System"; Paper Trade Journal, Aug. 13, 1962, pp. 32-39.
Paper Technology; "Measures Fibre Charge On-Line", PT Dec./Jan. 1989.
Paper Trade Journal, "Optical Device Installed at Wet End Monitors Single-Pass Filler Retention", Mar. 1, 1977, pp. 32-34.
Perry et al., "Perry's Chemical Engineering Handbook, Fourth Ed.", McGraw Hill, N.Y., 1963, pp. 2-75-2-77.

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