| 摘要 |
PURPOSE:To always obtain a concentrate with constant concn. and to also adjust the concn. of a separated liquid to an objective value or less, by providing a screw decanter type centrifugal concentrator controlling the concn. of the concentrate according to an inner body torque constant control system and an attachment detecting the concn of the separated liquid to control the supply amount of a raw liquid. CONSTITUTION:A process controller 5 is compares feedback signal of the torque value of an inner body 2 detected by a torque detector 13 and inputted through a torque display operator 14 with the set torque value of the inner body 2 imparted through a torque setting device 16 to calculate deviation. If there is deviation, the speed of a variable speed back-drive apparatus 17 is corrected through a first controller 18 so as to eliminate deviation to adjust the torque value of the inner body 2 to the aforementioned set torque value, the measuring concn. signal from a separated liquid densitometer 22 is inputted to an operator 24 and, when the concn. of a separated liquid exceeding an objective value was detected, a second controller 25 inputs a signal exceeding said objective value to reduce the supply amount of a raw liquid.
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