The invention discloses a separating speed adjustable type circulating
grain drying machine which comprises a grain storing cabin, a feeding hoister, a feeding hopper hoister and a
drying system, wherein the feeding hoister and the feeding hopper hoister are mounted on two sides of a grain storing cabin base; the
drying system is mounted below the feeding hopper hoister and comprises a fixed rack,a feeding elephant
trunk, a discharging elephant
trunk, a hot-blast air inlet connecting
pipe, an air outlet
pipe, a fixed coaming and a
drying device; the fixed coaming is mounted around the dryingdevice; the drying device comprises a driving motor, a driving
sprocket, a pulling chain, a porous screen plate and a heat-resisting rubber flexible plate; and grain in the grain storing cabin is controlled by a discharging gate to enter the feeding hopper hoister, enters into the drying device to be dried on the drying
system via a feeding
pipe, is conveyed to the discharging elephant
trunk to bedischarged, and enters the grain storing cabin via a grain feeding pipe through the feeding hoister. According to the technical scheme, the separating speed adjustable type circulating
grain drying machine is simple in structure and safe and reliable; a grain storing layer, a drying layer and a transportation device are designed in a separating manner, so that
secondary loss of grain is avoided;and the separating speed adjustable type circulating
grain drying machine is convenient in mounting and overhaul and uniform in heating, improves the drying quality and reduces
energy consumption andfailure rate.