Small circulating grain dryer make use of the clean hot air as heat medium to dry grain. The interior of dryers is composed of angular ventilation boxes, which is arranged in a staggered arrangement. The angular boxes are filled with grains flowing downward. The hot air enters the intake angular box through the grain layer, and passes through the grain layer from above to below.

1. The dryer is set multiple emergency grain discharge ports for easy maintenance and troubleshooting.
2. Coal or straw, wood and other biomass fuels are taken as fuels of hot blast stove. The combustion efficiency is high, significantly reducing the fuel cost.
3. Hand-fired hot blast stove and efficient steel tubular heat exchanger with the integrated structure of hot blast