| 摘要 |
A process for thickening a fibrous pulp suspension by guiding the suspensio n between a rigid first face and a flexible second face that move in relation to each other and form a converging draining gap, where the first face and/or the second face is/are water permeable, and where the process includes providing the suspension to be drained, forming from the suspension a fibrous pulp layer with a solid matter content of at least about 4% on at least one of the first face and the secon d face, guiding the fibrous pulp layer into the draining gap, applying a pressure differential in the draining gap via the second face to thicken the fibrous pulp layer, t he pressure differential being formed by stretching the second face and pressing the fir st face and the second face toward each other to drain water from the fibrous pulp layer , and transporting the thickened fibrous pulp from the draining gap. |
