METHOD FOR CONTROLLING SCREENING BY MEASURING FLOW AMOUNT AND CONSISTENCY OF THE PULP

摘要

The invention relates to a method of controlling quality of pulp. Pulp forme d in mechanical defibering of wood is screened into at least two fractions, th e accept that has passed the screening phase being forwarded for further use a nd the reject that did not pass the screening being removed from the screening phase. The invention comprises determining flow amount and consistency of th e pulp supplied to the screening phase and, correspondingly, of the reject removed therefrom, and calculating a passage ratio of the reject and the supplied pulp by means of the flow amounts and consistency values verified through the measurement, and adjusting the screening phase according to said passage ratio.