METHOD AND DEVICE FOR DRYING MATERIALS

摘要

The invention relates to the field of techniques for drying materials of plant and animal origin. The drying method includes heating a material to a temperature that does not cause denaturation of the original properties thereof, high-speed pulse vacuuming, maintaining the vacuum for a period of time, and relieving the vacuum until atmospheric pressure is reached. The material is heated in a drying chamber and the vacuum is relieved using a dried air or gas heat carrier with a temperature of up to 300ºC. A drying device comprises two drying chambers with hermetically sealing doors, which are connected by pipes having fast-acting valves to a receiver tank, heat exchangers (condensers) and condensate receivers. The device also contains a vacuum pump and a device for heating and delivering a heat carrier, which is situated in a separate thermally insulated chamber and is connected to the inlet of each drying chamber by means of thermally insulated air delivery conduits with valves. A container is mounted in each chamber so as to be capable of rotating and is provided with a pipe that is situated along the axis of rotation, the surface of the pipe or the end face of the container being perforated for the delivery of heat carrier and the corresponding opposite walls of the container being made of mesh. The invention makes it possible to reduce drying time and improve drying quality.