Bridge reducing mixed-flow grain dryer with cross-flow vacuum cool heat recovery system

A grain dryer system, comprising:

• one or more grain columns;
• wherein the one or more grain columns includes one or more interior walls and one or more exterior walls;
• the one or more grain columns having a mixed-flow drying section;
• wherein the mixed-flow drying section includes a plurality of inlet ducts;
• wherein the plurality of inlet ducts are connected to vent openings in the one or more interior walls;
• wherein the mixed-flow drying section includes a plurality of exhaust ducts;
• wherein the plurality of exhaust ducts are connected to vent openings in one or more exterior walls;
• a plurality of air restrictors;
• wherein the plurality of air restrictors are configured to restrict the flow of air into the plurality of inlet ducts.

A grain dryer system, comprising:

• at least one grain column;
• wherein the at least one grain column includes an interior wall and an exterior wall;
• the at least one grain column has a mixed-flow drying section;
• wherein the mixed-flow drying section includes a plurality of inlet ducts;
• wherein the plurality of inlet ducts are connected to vent openings in the interior wall;
• wherein the mixed-flow drying section includes a plurality of exhaust ducts;
• wherein the plurality of exhaust ducts are connected to vent openings in the exterior wall;
• a plurality of vent covers operably connected to the exterior wall at positions of the vent openings;
• wherein the plurality of vent covers are configured to move between an open position and a closed position.