Online ventilating drying device

The invention provides an online ventilating drying device. The device can be connected into a full-automatic fire coal sample preparation system in a seamless manner, online sample preparation of high-humidity coal samples can be achieved, manual pre-drying procedures are reduced, the moisture adapting capacity of the sample preparation system is improved, and meanwhile manual labor intensity can be effectively lowered. The device comprises a hopper, a material stirring device and a heating device, the material stirring device is arranged in the hopper, a weighing device, a conveying device, a support and a bottom disc are further included, the hopper and the conveying device are arranged on the support, the hopper is located on the upper middle portion of the conveying device, and the bottom of the hopper is communicated with the top of the conveying device. The support is arranged on the bottom disc, a plurality of sets of supporting air cylinders are arranged between the support and the bottom disc for connection, the weighing device is arranged at the top of the bottom disc, the conveying device comprises a solid-liquid separation belt and a belt wheel, the belt wheel is arranged on the support, and the heating device is arranged below the conveying device, and comprises a ventilating disc, a heater and an air blower.