Method and device for concentrating liquid-drenched material
AssigneeValmet Fibertech AB
InventorEbbe Hodén
Life of this patent
Estimating the term…
Abstract
Methods for the concentration of a dilute material such as a fiber suspension are disclosed including enclosing the dilute material between a first straining belt and a second straining belt both moving through endless paths, and in which the width of the first straining belt is greater than the width of the second straining belt, and the method includes causing the longitudinal edges of the first straining belt to overlap the longitudinal edges of the second straining belt in an initial concentration stage, unfolding the longitudinal edges of the first straining belt and then further compressing the concentrated layer produced against the first straining belt in a further concentration stage. Apparatus for carrying out this method is also disclosed.
Claims8
A method for the concentration of a dilute material by forming said dilute material into a concentrated layer having a predetermined width, said method comprising enclosing said dilute material between a first straining belt having a first width which is insufficient to completely enclose said concentrated layer and including a pair of longitudinal edges and a center portion, and a second straining belt having a second width which is insufficient to completely enclose said concentrated layer, and including a pair of longitudinal edges, moving said first and second straining belts through first and second endless paths, said first width being greater than said second width, causing said pair of longitudinal edges of said first straining belt to overlap said pair of longitudinal edges of said second straining belt in an initial concentration stage, unfolding said pair of longitudinal edges of said first straining belt, and further compressing said concentrated layer against said first straining belt in a further concentration stage.
Apparatus for the concentration of dilute material by forming said dilute material into a concentrated layer having a predetermined width, said apparatus comprising a first straining belt having a first width which is insufficient to completely enclose said concentrated layer, and a pair of longitudinal edges and a central portion, and having a first endless path, a second straining belt having a second width which is insufficient to completely enclose said concentrated layer, and a pair of longitudinally extending edges, and having a second endless path, said first width being greater than said second width, enclosing means for causing said longitudinal edges of said first straining belt to be folded over said longitudinal edges of said second straining belt whereby said first and second straining belts enclose said concentrated layer in an initial concentration stage, and secondary concentration means comprising means for unfolding said longitudinal edges of said first straining belt whereby said concentrated layer is further compressed against said first straining belt in a further concentration stage.
Dependencies are inferred from the claim text.