Coal and gangue identification device and coal and gangue sorting system

A coal and gangue identification device, comprising a rotary supporting frame, a water injection unit, a weighing unit, a liquid level detection device, and a processing module, wherein

• the rotary supporting frame is provided with a loading unit used to load a mineral aggregate;
• the rotary supporting frame is used to drive the loading unit to rotate on a horizontal plane;
• in the rotating process of the rotary supporting frame, the loading unit cyclically passes through a water injection region (20a), a material adding region (20b), a volume measurement region (20c), and an unloading region (20d) which are sequentially disposed on a rotation trajectory of the rotary supporting frame;
• the water injection unit is used to inject water to the loading unit of the water injection region (20a);
• the weighing unit is used to acquire the weight of the mineral aggregate filled to the loading unit in the material adding region (20b);
• the liquid level detection device is used to measure a liquid level in the loading unit on the volume measurement region (20c);
• the processing module is used to calculate, according to a measurement result of the liquid level detection device, a volume of the mineral aggregate filled to the loading unit, and is used to identify the mineral aggregate in combination with the volume and the weight of the mineral aggregate obtained by the weighing unit;
• and the processing module is also used to control, according to an identification result, the loading unit to perform unloading in the unloading region (20d).