Apparatus for measuring the particle size range in a suspension
OwnerKjell R. A. Erikssoninventor
Life of this patent
Estimating the term…
Abstract
The particle size range of a paper pulp suspension is determined by flowing the suspension up a measuring tube having a filter at the bottom thereof. When a plug of suspended material has formed, the inlet of the measuring tube is closed off. A liquid is then fed to a member which forms a gap in the plug of material and passes up through a measured portion of the suspension. The time taken for the liquid to pass through the plug to a given height is indicative of the mean particle size of the suspension.
Claims9
Apparatus for measuring the particle size range in a suspension, comprising a vertical through-flow passage for the suspension, said passage including a space in which a stationary quantity of suspension from the through-flow passage can collect;
- a measuring tube connected to said space and being provided with a filter which allows liquid through and traps a plug of suspension particles, and a sealing member to cover and uncover the end of said measuring tube at the end by said space;
- means in said measuring tube to separate a suspension layer of predetermined thickness from said plug in front of the filter thereby producing a gap in front of the layer to permit the passage of liquid under predetermined pressure through the layer and the filter;
- and means for measuring the flow rate of said liquid through said layer.
Dependencies are inferred from the claim text.