| 摘要 |
PROBLEM TO BE SOLVED: To provide a solid-liquid separation device which is quickly adapted to a concentration change of raw liquid, presets a proper differential velocity, continues stable operation, and can improve productivity.SOLUTION: A solid-liquid separation device includes: a rotation bowl (11) into which raw liquid is supplied; a screw conveyor (12) arranged in the rotation bowl; a raw liquid supply pipe (15) through which the raw liquid is supplied to the rotation bowl; a differential velocity electric motor (19) which presets a prescribed differential velocity for rotation of the screw conveyor; a galvanometer (21) which detects a current value of the differential velocity electric motor; a differential velocity automatic control device (20) which controls the differential velocity electric motor with respect to the current value; a concentration detection device (26) which detects a concentration of the raw liquid flowing through the raw liquid supply pipe; and a differential velocity estimation control device (23) which, when the concentration of the raw liquid detected by the concentration detection device exceeds an automatic control threshold, sets a differential velocity as a preset increase velocity differential velocity upon high concentration.SELECTED DRAWING: Figure 2 |
