| 摘要 |
A process for thickening a fibrous pulp suspension by guiding the suspension between a rigid first face and a flexible second face that move in relation to e ach 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 second fa ce, guiding the fibrous pulp layer into the draining gap, applying a pressure differ ential in the draining gap via the second face to thicken the fibrous pulp layer, the p ressure differential being formed by stretching the second face and pressing the first f ace and the second face toward each other to drain water from the fibrous pulp layer, an d transporting the thickened fibrous pulp from the draining gap. |
