Metso Paper Automation Oy

Jukka Nokelainen

Taisto Huhtelin

Timo Rantala

Risto Kuusisto

Lin Tian

The invention relates to a method and equipment for controlling properties of paper, in which method the effect of the flow of retention agent (F,) and the stock flow (F,) on the basis weight of the paper (BW) is modelled. The fulfilled modelling is used to adjust the basis weight of the paper (BW) by controlling simultaneously the flow of retention agent (F,) and the stock flow (F,).

Method and equipment for controlling properties of paper

The invention relates to a method and equipment for controlling properties of paper, which method comprises modelling the effect of the flow of retention agent (F,) both on the amount of filler in the white water and on the paper ash content (ASH), and the effect of the flow of filler (F,) both on the paper ash content (ASH) and on the amount of filler in the white water. The fulfilled modelling is used to adjust the amount of filler in the white water and the paper ash content (ASH) by controlling simultaneously the flow of retention agent (F,) and the flow of filler (F,).

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Kajaani, Finland

Jukka Nokelainen