Method and device for forming a filtering fiber cake in an apparatus for measuring the beating degree of pulp flowing through a conduit

摘要

Apparatus in which a sample of pulp flowing through a conduit is periodically introduced into a cylinder. The pulp is deposited upon the strainer element of a piston assembly so as to form a fiber cake which, after formation, is utilized to test the flow of water therethrough over a predetermined time interval in order to measure the degree of beating of the pulp flowing through the conduit. In order to form a fiber cake upon the piston strainer element in which the layers are of substantially uniform density, water at a pressure higher than that utilized during the test period is introduced into the test cylinder and in a direction substantially tangential to the interior surface of the cylinder in order to set up a rotating flow of fluid facilitating formation of fiber cake layers of uniform density.