System and method for determining critical suspension speed of impeller in solid-liquid stirred tank

A system for determining a critical suspension speed of an impeller in a solid-liquid stirred tank, comprising a stirred tank, wherein an impeller is provided in the stirred tank;

• the impeller is connected to a motor;
• the motor is connected to a speed controller;
• a side wall of the stirred tank horizontally flush with the impeller is provided with a first set of electrodes;
• a middle bottom position of the stirred tank is provided with a second set of electrodes;
• the first set of electrodes comprises two first excitation electrodes and two first measurement electrodes;
• the second set of electrodes comprises two second excitation electrodes and two second measurement electrodes;
• the first excitation electrodes and the second excitation electrodes are connected to a constant-current source;
• and the first measurement electrodes and the second measurement electrodes are connected to a computer through an analog-to-digital converter;
• wherein the first excitation electrodes are equidistant between the first measurement electrodes, and the second excitation electrodes are equidistant between the second measurement electrodes.