Concentrating method and means therefor
AssigneeSunds Defibrator Industries Aktiebolag
InventorEbbe Hoden
Life of this patent
Estimating the term…
Abstract
Methods and apparatus for concentrating a liquid suspension of solid particles are disclosed including providing a screening web moving in an endless path, folding the screening web into a tubular configuration at a first location along that path, unfolding the screening web from that tubular configuration at a second location along that path, introducing the liquid suspension into the tubular configuration of the screening web proximate to the first location so that liquid can pass outwardly through the tubular configuration of the screening web and a concentrate of the solid particles can be formed therein, and removing the concentrate from the screening web proximate to the second location.
Claims56
A method for concentrating a liquid suspension of solid particles comprising providing a screening web moving in an endless path, folding said screening web into a tubular configuration at a first location along said endless path, providing a secondary web of highly liquid permeable material, folding said secondary web into a tubular configuration within said tubular configuration of said screening web, unfolding said screening web from said tubular configuration at a second location along said endless path, introducing said liquid suspension into said tubular configuration of said screening web proximate to said first location whereby said liquid can pass outwardly through said tubular configuration of said screening web and a concentrate of said solid particles can be formed therein, and removing said concentrate from said screening web proximate to said second location.
An apparatus for concentrating a liquid suspension of solid particles comprising a screening web, means for moving said screening web in an endless path, a secondary web of highly liquid permeable material, web folding means at a first location along said endless path for folding said screening web and said secondary web into a tubular configuration with said secondary web within said tubular configuration of said screening web, web unfolding means at a second location along said endless path for unfolding said screening web and said secondary web from said tubular configuration, liquid suspension introduction means for introducing said liquid suspension into said tubular configuration of said screening web proximate to said first location, whereby said liquid can pass outwardly through said tubular configuration of said screening web and a concentrate of said solid particles can be formed therein, and concentrate removal means for removing said concentrate from said screening web proximate to said second location.
A method for concentrating a liquid suspension of solid particles comprising providing a screening web having a central portion and first and second edge portions moving in an endless path, folding said screening web into a tubular configuration at a first location along said endless path by passing said central portion of said screening web over a first transverse folding edge while passing said first and second edge portions of said screening web over pairs of web folding edges extending inwardly and outwardly with respect to said first transverse folding edge from both sides thereof whereby said screening web is folded into said tubular configuration without tensioning said first and second edge portions of said screening web more than said central portion of said screening web, unfolding said screening web from said tubular configuration at a second location along said endless path by passing said central portion of said screening web over a second transverse folding edge while passing said first and second edge portions of said screening web over a pair of web unfolding edges extending above said second transverse folding edge so as to unfold said screening web, introducing said liquid suspension into said tubular configuration of said screening web proximate to said first location whereby said liquid can pass outwardly through said tubular configuration of said screening web and a concentrate of said solid particles can be formed therein, and removing said concentrate from said screening web proximate to said second location.
An apparatus for concentrating a liquid suspension of solid particles comprising a screening web having a central portion and first and second edge portions, means for moving said screening web in an endless path, web folding means at a first location along said endless path for folding said screening web into a tubular configuration, said web folding means comprising a first transverse folding edge, a first pair of web folding edges extending from both sides of said first transverse folding edge inwardly with respect to said transverse folding edge, and a second pair of web folding edges extending from both sides of said first transverse folding edge outwardly with respect to said first transverse folding edge so as to overlap said first web folding edge whereby said web is folded into said tubular configuration without tensioning said edge portions of said web greater than said central portion of said web, web unfolding means at a second location along said endless path for unfolding said screening web from said tubular configuration, said web unfolding means comprising a second transverse folding edge, a third pair of web folding edges extending from both sides of said second transverse folding edge inwardly with respect to said second transverse folding edge, and a fourth pair of web folding edges extending from both sides of said second transverse folding edge outwardly with respect to said second transverse folding edge whereby said web is unfolded thereby, liquid suspension introduction means for introducing said liquid suspension into said tubular configuration of said screening web proximate to said first location, whereby said liquid can pass outwardly through said tubular configuration of said screening web and a concentrate of said solid particles can be formed therein, and concentrate removal means for removing said concentrate from said screening web proximate to said second location.
Dependencies are inferred from the claim text.