Drum helical microwave drying unit CONTINUOUS DRYER loose and granulated materials

摘要

1. The drum helical microwave drying unit for drying a continuous bulk or granular material, comprising a frame with a drive and transmission, a rotary drum mounted horizontally with the end caps, with holes in the middle, a resonant slotted waveguide radiator is connected to a source of electromagnetic waves, in which is used as a microwave generator, hot air supply device and the removal of vapor, characterized in that the drum, with an inner radius r = 0,5 ... 6λ, where λ - length of the microwave olny in free space, a boot device is rigidly attached to the frame, a conveying screw is rigidly attached to the drum with the step, h the height of the blade (0,8 ... 1,2) Δ, where Δ - depth of penetration of microwave energy into the material, and the angle helical surface inclination β = 75 ... 135 °, the latter has a coil height where d- diameter hole in the discharge end cover, stirring blades, rigidly fixed pitch p = 15 ... 90 ° on the inner surface of the drum, a height h = (0, 1 ... 0.5) hi discharge opening located at the last portion of th revolution of the conveying screw near the waveguide end of the drum cover, coinciding with the holes exorbitant waveguides rigidly attached to the outer surface of the drum, wherein the total exorbitant waveguides hole area should be greater than or equal to the area of ​​the discharge orifice, and through a waveguide endcap introduced waveguide slit resonant emitter disposed at an angle to the horizontal γ = γ, where γ - the angle of repose of the material with fixed on it from above venting device