Patent ID: 7115202
Filing Date: 2006-10-03
Classification: B04B

Abstract:
1. A method for separating a multi-phase mixture, into at least one liquid phase and one dry phase with a given dry matter concentration c TS using a decanting centrifuge which includes: (a) an annular immersion disk that is connected to a shaft at its inside circumference and that exhibits an outside diameter that is smaller than the inside diameter of a centrifuge drum; and (b) at least one liquor weir with a weir gap arranged at the end face of the centrifuge drum that can be used to draw the liquid phase from the centrifuge drum, and with a tank depth setting device that can be used to set the tank depth X said method comprising the steps of: (1) starting up of the centrifuge drum to a start-up drum speed n (2) introducing the multi-phase mixture into the rotating centrifuge drum; (3) drawing off the dry phase through the at least one dry matter discharge opening and drawing off the liquid phase through the weir gap; (4) controlling the tank depth x (5) specifying a tank depth tolerance range with a lower tank depth X (6) comparing the adjusted tank depth x (7) raising the centrifuge drum speed nz by a speed step value Δn (8) re-adjusting the tank depth x (9) comparing the re-adjusted tank depth x