The invention discloses a negative-pressure
microwave uniform spraying and
drying device and application, belonging to the technical field of uniform
drying devices. The negative-pressure
microwave uniform spraying and
drying device comprises a circulating
material storage device, a feeder, a negative-pressure spraying
pipe, a
microwave heating cavity, a
cyclone separator, a vacuum
storage tank, a
discharger, a water ring
vacuum pump, a circulating
pipe and microwave sources. The circulating
material storage device is used for storing materials dried circularly, the feeder is used for feeding dry materials to the negative-pressure spraying
pipe which is a channel for drying and circulating the materials, and the microwave sources are uniformly distributed inside the microwave heating cavity, two ends of which are sealed. The
cyclone separator is connected with an outlet of the negative-pressure spraying pipe inside the microwave heating cavity and is connected with the vacuum
storage tank and the
discharger through a channel. The
discharger is connected with the circulating
material storage device through the circulating pipe. Because the materials can be sprayed under negative pressure, the device can be used for spraying, rotating and circulating the materials under a microwave
vacuum drying condition so as to achieve the purpose of drying the materials efficiently and uniformly, meanwhile, is favorable for shortening the
drying time by above 40% and reducing the cost of large-scale production.