Method and device for feeding chemicals into a fibre suspension

Details Method and device for feeding chemicals into a fibre suspension Method and device for feeding chemicals into a fibre suspension

2005-01-11

2005-01-11

Chin, Peter (Department: 1731)

Paper making and fiber liberation

Processes and products

Non-fiber additive

C162S264000, C162S322000, C162S336000, C162S343000

Reexamination Certificate

active

06841040

ABSTRACT:
In the short circulation of a paper machine, a chemicals flow (F1) is fed into a fibre suspension flow in connection with a pipe expansion comprising a first pipe (1) and a second pipe (2) having a larger diameter than the first pipe, which pipes are connected to each other by means of an expansion step (3) perpendicular to the direction of flow. The chemicals flow (F1) can be passed so as to be mixed with the fibre suspension flow either in the second pipe (2) in an ideal mixing zone situated after the expansion step (3) or in the first pipe (1) so close to the expansion step (3) that the chemicals which are added have no time to react with the fibre suspension before the flow enters the expansion step (3).

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Notice of Opposition issued May 3, 2004, in Finnish Patent No. 111397 (App. No. 20012447).
Search Report issued in Finnish Patent 20012447.

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