Dynamic fluidized bed system and dynamic fluidized separation method

A dynamic fluidized bed system, comprising a blower, a vibrating table, a fluidization chamber, a pressure acquisition unit and a controller;

• the fluidization chamber is placed on the vibrating table, the vibrating table drives the fluidization chamber to vibrate, and an air outlet of the blower is connected to an inner cavity of the fluidization chamber;
• data acquisition ends of the pressure acquisition unit are located in a bed layer of the fluidization chamber, the pressure acquisition unit acquires pressure signals at different vertical positions within the bed layer and transmits the pressure signals to the controller, the controller receives the pressure signals, calculates differential pressure signals, converts the differential pressure signals into density signals, processes the density signals to generate Hilbert spectrums of particles in the bed layer, and determines whether the bed layer is in a mixed state or a separated state based on the Hilbert spectrums;
• an X-axis coordinate of the Hilbert spectrums is frequency, a Y-axis coordinate is time, and a Z-axis coordinate is density fluctuation amplitude;
• 0~10 Hz is a bubble frequency, and 20~30 Hz is a vibration frequency;
• in case peak density fluctuation amplitude at 0~10 Hz is less than or equal to peak density fluctuation amplitude at 20~30 Hz, indicating that the bed layer is in the separated state;
• in case the peak density fluctuation amplitude at 0~10 Hz is greater than the peak density fluctuation amplitude at 20~30 Hz, indicating that the fluidized bed is in the mixed state;
• wherein the dynamic fluidized bed system further comprises an air distribution chamber, an air distribution plate, and an air distribution layer, the air distribution chamber is located at a bottom of the fluidization chamber and is connected to the fluidization chamber, a bottom end of the air distribution chamber is connected to the vibrating table, the air distribution plate and the air distribution layer are arranged between the air distribution chamber and the fluidization chamber, and an air inlet of the air distribution chamber is connected to the air outlet of the blower;
• one end of the air distribution plate near a gangue discharge port is rotatably connected to the fluidization chamber, and an other end of the air distribution plate is a free end;
• the air distribution chamber comprises an inner telescopic sealing ring, an outer telescopic sealing ring, an inner pipe, and an outer pipe sleeved outside the inner pipe;
• a gap is between the outer pipe and the inner pipe;
• the air distribution plate is divided into a central area and a surrounding area around the central area;
• the surrounding area is provided with main air distribution holes, while the central area is not provided with main air distribution holes;
• an air outlet of the inner pipe covers the central area and is connected to an edge of the central area via the inner telescopic sealing ring;
• the inner pipe is equipped with a suction pump;
• an air outlet of the outer pipe covers the surrounding area and is connected to an edge of the surrounding area via the outer telescopic sealing ring.