procedures for the settlement of sortiersystemen and the application of this procedure, appropriate sorting system

摘要

Controlling a sorting system for papermaking, in which a pulp suspension is separated into fine and coarse fractions, the coarse fraction is resorted and the fine fraction is recycled, comprises determining the inlet and outlet mass flows by online measurement or calculation and supplying the results to a status controller for mathematical modeling and controlling the sorting system and modifying machine parameters selectable as a function of preset target values, e.g. production, efficiency and fiber loss. An independent claim is also included for a sorting system for papermaking, comprising two sorters with outlets for fine and coarse fractions equipped with flow sensors and control valves, where the fine fraction from the second sorter is added to the fine fraction from the first sorter, and a status controller that balances the mass flows by receiving the output signals from the flow sensors and controlling selectable machine parameters as a function of preset target values taking into account a mathematical model of the sorting system.