The invention relates to a
drying device and method using contact
ultrasound to strengthen low-pressure
superheated steam. The device is equipped with a
drying box connected with a
vacuum pump, a boiler, a steam
storage tank, an
ultrasonic generator, an ultrasonic
transducer and an
ultrasonic radiation plate , the boiler is connected to the steam
storage tank through a conduit, the steam
storage tank is connected to the
drying box through a conduit, and a
steam injection port is provided in the drying box at the connection point, the ultrasonic
transducer is arranged in the drying box, and the drying box is connected to the drying box through a wire. The
ultrasonic generator outside the box is connected, and the
ultrasonic radiation plate is set on the ultrasonic
transducer; this method uses low-pressure
superheated steam as the drying medium, on the one hand, the
boiling point of the water in the material is reduced through the low pressure, which is conducive to the
evaporation of water, on the one hand, it is different from the normal Compared with high-pressure
superheated steam, the use of low-pressure superheated steam reduces the drying temperature, thereby reducing the risk of
thermal decomposition of active ingredients to a certain extent, while ensuring a higher drying rate.