Apparatus and method for sectional pulp introduction to a...

Details Apparatus and method for sectional pulp introduction to a... Apparatus and method for sectional pulp introduction to a...

D - Textiles, Paper

21

F

D21F 1/00 (2006.01) D21F 1/02 (2006.01) D21F 1/08 (2006.01)

Patent

CA 2152830

A device for the sectional supply of pulp suspension to a headbox of a papermaking machine includes a plurality of main inlet lines from a pulp suspension distributor which are distributed over the width of the machine. A throttle is provided in at least one main inlet line. Downstream of the throttle, in at least one of the main lines, a subsidiary line for conveying a subsidiary stream of liquid, such as a pulp suspension or water, is connected to the main inlet line and disposed at an angle to the main inlet line. This angle between the main pulp stream and the subsidiary stream is chosen so that a small change in the rate of flow of the subsidiary stream will cause a large change in the rate of flow of the total stream (main pulp stream + subsidiary stream) directed in the same direction or in the opposite direction of the stream.

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