Metso Paper Inc.

Valmet Automation Oy

Upm-kymmene Corporation

Pasi Virtanen

Harri Kosonen

Petteri Lannes

Sakari Soini

Matti Ristolainen

Jukka Sorsa

Juha Ojanen

Teuvo Leppänen

Kari I Salminen

Kimmo Penttil&auml;

Kari R&auml;is&auml;nen

Kari J Salminen

Jukka Pennanen

Teemu Pohjalainen

Sakari Modig

Janak Sapkota

A controller of a process includes a resource consumption optimizer which receives sets of control actions for a plurality of actuators from an advanced process controller performing independent data processing with respect to the resource consumption optimizer, each set of control actions resulting in a set-specific combined control action effect. The resource consumption optimizer optimizes resource consumption associated with the sets of control actions by modifying at least one control action on the basis of resource consumption associated with the actuator performing the control action while keeping a difference between a combined control action effect of a modified control action set and a combined control action effect a received control action set set-specifically within an accepted range.

Optimization of a process

In a paper or board machine, the cross-direction profile of a flow channel defined between a first dewatering element () situated inside a first forming wire loop () and a second dewatering element () situated inside a second forming wire loop () is measured, and the location and/or the position of the blade element () is adjusted based on the measurement result in order to regulate the thickness profile of a stock flow. The measurement can be by passing an alternating current of low frequency to a current rail situated in the second dewatering element () and by measuring the strength of the magnetic field created by it by at least two measuring devices which have been placed either in the first dewatering element () or, when the first dewatering element is a forming roll (), in the same dewatering element (64) as the current rail.

Method and regulation arrangement for controlling dewatering profile of a former

The invention concerns an equipment and a method in a twin-wire former, in which a partly pre-drained or non-drained fiber stock is passed to between the forming wires of the web former in the vicinity of the former roll ( ) or of a water drain box, in which connection water is drained out of the stock web by means of the former roll ( ) or the water drain box. The twin-wire former comprises a rib ( ) in connection with the former roll ( ) or the water drain box in the lateral area of the wires (H ), which rib has been fitted to control the running of the second forming wire H ) passed from the gap roll. By means of the rib ( ), in the lateral area of the wire runs, the point at which said forming wire (H ) reaches contact with the first forming wire in connection with the former roll ( ) or the water drain box is shifted further away in the machine direction. The rib ( ) is an oblong structure, which has a maximal height (H ) in the middle area of the rib ( ).

Equipment and method in a twin-wire former

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Valkeakoski, Finland

Pasi Virtanen