METHOD AND DEVICE FOR MEASUREMENT OF THE RETENTION PROFILE AND FOR CONTROL OF THE RETENTION IN A PAPER/BOARD MACHINE

摘要

In a method and a device for measurement and regulation of the retention profile of the web in a paper/board machine, from the white water drained fr om the web through the wire in the wire part, samples are taken by means of a sample collecting device a number of points in the cross direction of the web, preferably at uniform distances, the samples that were taken are analyzed by means of an analyzer, a retention profile is formed out of the measurement results, and the retention profile thus formed is used for controlling the paper machine.