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    • 3. 发明专利
    • SUSPENSION LEVEL CONTROL METHOD
    • JP2002054980A
    • 2002-02-20
    • JP2000239253
    • 2000-08-08
    • MITSUBISHI CHEM CORP
    • TANAKA YUTAKAKAWAKAMI TETSUGONANBA YOSHIAKI
    • G01F23/288B01F3/12B01J8/00B01J8/10
    • PROBLEM TO BE SOLVED: To provide a suspension level control method capable of highly accurately maintaining the suspension level height in a suspension tank such as a suspension reaction tank in the specific height by simple operation. SOLUTION: In this suspension level 2a control method for adjusting the height of the suspension level 2a in the suspension tank 1 for continuously extracting these members as a suspension under agitation 1a by continuously supplying solid particulates, liquid and pressurized gas, a γ ray irradiation 4 in the vertical direction to the suspension level 2a from a gaseous phase part 3 above a suspension phase part 2 in the tank 1, passes through the suspension phase part 2 is detected (5) outside the tank, and is compared with a preset value of the previously taken-in height of the suspension level 2a from the detecting γ ray quantity, a change quantity is arithmetically operated and calculated in a block 6, and the height of the suspension level 2a is adjusted by operating valve opening of an extracting valve 7 on the basis of the calculated change quantity.