METHOD AND APPARATUS FOR CONTROLLING THE OPERATION OF STOCK PREPARATION OF A PAPER MACHINE

摘要

A method and an apparatus for controlling the operation of stock preparation of a paper machine for preparing machine stock from component stocks. The stock preparation includes a plurality of successive blending points, where the component stocks are blended with each other, a second raw material of the machine stock is added to the stock and/or the stock is diluted by blending dilution water with the stock. The flow and/or consistency of one or more stocks arriving at a blending point and/or the flow and consistency of the stock leaving a blending point and/or the concentration of the second raw material of the machine stock in the stock is adjusted in such a manner that the flow and/or consistency of the stock and/or the concentration of the second raw material of the machine stock in the stock follow target values determined for them.