Abstract: A grain dryer has an upper plenum in communication with a pair of heating columns. Each heating column has an inner boundary and an outer boundary being formed with a plurality of angled containment baffles configured to funnel grain down the heating column while allowing heated air to be drawn from the upper plenum through the grain. At least one fan takes a suction from the ductwork to draw heated air from the upper plenum through the heating column such that grain is exposed to heated air. The orientation of the containment baffles forming the inner boundary directs the flow of the heated air in a downward direction through an inner portion of a grain column between the inner boundary and the outer boundary, and the orientation of the containment baffles forming the outer boundary directs the heated air in an upwards direction in an outer portion of the grain column.

Abstract: A grain dryer has pair of heating columns in communication with an upper plenum, and a pair of cooling columns in communication with a lower plenum. A heater is located between the lower plenum and the upper plenum, wherein air is heated by the heater as air in the lower plenum is pulled through the heater and into the upper plenum. As the grain flows into the cooling column, it is exposed to cooling air being pulled through the cooling column into the lower plenum. A cooling air bypass system having a plurality of bypass tubes brings bypass air into the lower plenum from outside the grain dryer without having the bypass air come into contact with the grain being cooled in the cooling section. The cooling air bypass system includes a grill with an adjustable damper to adjust the amount of bypass air that flows into the lower plenum.

Abstract: A grain dryer has a pair of heating columns with an upper plenum in communication with the pair of heating columns. Each heating column has an inner boundary and an outer boundary being formed with a plurality of angled containment baffles configured to funnel grain down the heating column while allowing heated air to be drawn from the upper plenum through the grain. The grain dryer has a plurality of grain diverters mounted longitudinally at regular height intervals between the containment baffles forming the inner boundary and the containment baffles forming the outer boundary. Each grain diverter is shaped to form a downward facing nook that forms a void in the grain as the grain flows down the heating column.

Abstract: A grain dryer has a pair of heating columns, each having an inner boundary and an outer boundary formed with angled containment baffles configured to funnel grain down the heating column while allowing heated air to be drawn through the grain from an upper plenum. The grain dryer has a ductwork connected to the outer boundary of each heating column, and at least one fan that takes a suction from the ductwork to draw heated air from the upper plenum through the heating column. Debris entrained in higher velocity heated air leaving the outer boundary settles in the ductwork because of the lower velocity of the heated air. An access port is attached in the bottom portion of the ductwork that is operable between a closed position and an open position, wherein debris that settles in the bottom portion of the ductwork is removed through the access port.

Abstract: A grain dryer has an upper plenum in communication with a pair of heating columns. Each heating column has an inner boundary and an outer boundary being formed with a plurality of angled containment baffles configured to funnel grain down the heating column while allowing heated air to be drawn from the upper plenum through the grain. At least one fan takes a suction from the ductwork to draw heated air from the upper plenum through the heating column such that grain is exposed to heated air. The orientation of the containment baffles forming the inner boundary directs the flow of the heated air in a downward direction through an inner portion of a grain column between the inner boundary and the outer boundary, and the orientation of the containment baffles forming the outer boundary directs the heated air in an upwards direction in an outer portion of the grain column.

Abstract: A grain dryer has pair of heating columns in communication with an upper plenum, and a pair of cooling columns in communication with a lower plenum. A heater is located between the lower plenum and the upper plenum, wherein air is heated by the heater as air in the lower plenum is pulled through the heater and into the upper plenum. As the grain flows into the cooling column, it is exposed to cooling air being pulled through the cooling column into the lower plenum. A cooling air bypass system having a plurality of bypass tubes brings bypass air into the lower plenum from outside the grain dryer without having the bypass air come into contact with the grain being cooled in the cooling section. The cooling air bypass system includes a grill with an adjustable damper to adjust the amount of bypass air that flows into the lower plenum.

Abstract: The flame cone of the present invention is intended to be used with a heater for a grain bin or the like. The heater comprises a housing having one or more housing walls and having an inlet end and an outlet end. A blower is provided for forcefully moving air from the inlet end through the housing and out of the outlet end. A burner is provided within the housing for heating air moving through the housing. A flame diverter is positioned within the housing downstream from the burner for diverting the flame outwardly from the burner toward the walls of the housing. The diverter comprises a cone-shaped structure having a plurality of spaced slats diverging outwardly from the burner and toward the walls of the housing. More specifically, the improvement of this invention comprises a burner cone having an apex and an outer base spaced axially from the apex with the slope of the burner cone being generally similar to the slope of the diverter.