US 4,053,354 AGranted

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

AssigneeAB Kalle-Regulator, Industrivagen

InventorHenrik Martin Kitsnik

Life of this patent

Estimating the term…

Loading patent…

Abstract

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.

Claims6

Dependent claims

A method utilizing a porous strainer disc for forming a fiber cake from a sample of a fibrous suspension, comprising the steps of:

withdrawing a sample of a fibrous suspension from a conduit through which said suspension flows and introducing said suspension into a sampling vessel containing the disc so that the suspension enters on one side of the disc;
introducing a fluid into said vessel and on the same side of said disc at a first pressure greater than the pressure of said suspension flowing through said conduit as said suspension is being introduced into said vessel, said fluid being introduced into said vessel in a direction which is substantially tangential to the wall of the vessel to cause rotation of said suspension about the longitudinal axis of said vessel to form a fiber cake of even density upon said disc;
draining the fluids from the vessel;
introducing said fluid into said vessel at a second predetermined pressure, which is lower than said first pressure, upon the fiber cake formed upon said disc in said vessel;
measuring the rate of flow of fluid per unit time through the fiber cake to determine the degree of beating of the pulp flowing through the conduit.

2 more elements

Apparatus for forming a pulp cake from a sample of a fibrous suspension flowing through a conduit, said apparatus comprising:

a sampling cylinder connected to said conduit and containing a straining disc on which said pulp cake is to be formed, said sampling cylinder being closed at a first end and open at a second end, said second end is connected to a corresponding opening in said conduit;
means for introducing a sample of said suspension flowing through said conduit into said sampling cylinder;
means for causing said suspension to flow through said straining disc so as to form a pulp cake thereon;
at least one valve controlled conduit for introducing a fluid under pressure into said cylinder in a direction which is substantially tangential to wall of the sampling cylinder to cause rotation of said suspension about the longitudinal axis of said cylinder as said suspension is introduced into said cylinder whereby a pulp cake of substantially uniform density is caused to form on said straining disc.

1 more element

Dependencies are inferred from the claim text.