MECHANICAL AGITATOR FOR DIGESTION TANK

摘要

PROBLEM TO BE SOLVED: To eliminate the need for an accurate centering for a draft tube and to avoid resonance of an agitator pump. SOLUTION: The agitator pump 4 is installed on the periphery of a digestion tank 1. The digestion tank 1 is internally provided with the upper draft tube 2 and the lower draft tube 4. The device is provided with a downward current force pipeline 5 which communicates the discharge port 41 of the stirring pump 4 and the upper part of the lower draft tube 3, a downward current suction pipeline 6 which communicates the lower part of the upper draft tube 2 and the suction port 42 of the agitator pump 4, an upward current force pipeline 7 which communicates the discharge port 41 of the stirring pump 4 and the lower part of the upper draft tube 2 and an upward current suction pipeline 8 which communicates the upper part of the lower draft tube 3 and suction port 42 of the stirring pump 4. A downward current force pipeline stop valve 7V and a down ward pump 4. A downward current force pipeline stop valve 7V and a downward current suction pipeline stop valve 8V are closed when an upward current force pipeline stop valve 5V and an upward current suction pipeline stop valve 6V are open. The downward current force pipeline stop valve 5V and the downward current suction pipeline stop valve 6V are closed when the upward current force pipeline stop valve 7V and the upward current suction pipeline stop valve 8V are open.