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.

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.

Grain flow paths have an upper portion which is a mixed flow portion and which includes a preheat zone and a lower portion which is an undulating moisture equalizer portion and which includes a heat zone. Mixed flow grain diverters extend across the grain flow path substantially perpendicular to longitudinal side walls, and substantially parallel to transverse end walls of the grain flow path. Upper airflow openings are associated with each of the upper diverters. Moisture equalizer lower grain diverters extend along the longitudinal sides grain flow path substantially parallel to the longitudinal side walls, and substantially perpendicular to the transverse end walls of the grain flow path. The burner is positioned outside the airflow path to feed ambient air into the recirculating airflow path, without recirculating airflow passing through the burner.

A grain dryer having a mixed-flow heating section, a tempering transition section, and a vacuum-cooled crossflow cooling section. A fan positioned on the end of the dryer creates a negative pressure in the cooling plenum that pulls air through the grain, warming the air while cooling the grain. This warmed air is pulled through the fan and then passed through a heater to bring it to appropriate drying temperature. This air is then pushed into a heating plenum, where it passes through a mixed-flow grain column, drying the grain, and then exhausted to ambient air.

An improved mixed flow grain dryer is presented having a grain column with upper, middle and lower drying sections. The system includes a set of plenums and ducts configured to move air through the middle and lower drying sections at one or more lower temperatures, recover the air moved through the middle and lower drying sections, and move the recovered air through the upper drying section at a higher temperature. The system is configured to move grain through the upper drying section, then through the middle drying section, then through the lower drying section, while also: moving air of one or more lower temperatures through lower drying section and middle drying section, combining air moved through lower drying section and middle drying section, and moving the combined air through the upper drying section at a higher temperature.

The present invention refers to an automatic grain processing apparatus comprising, in an integrated manner, that is, in a single apparatus, the following units: a cleaning unit (2); a drying unit comprising a dryer (18), a grain weighing and classification unit; and a grain packaging and labelling unit. The present invention also refers to a grain integrity monitoring and tracking system, comprising one or a plurality of sensors arranged in a package and configured to measure the properties, such as temperature and/or moisture and/or pressure and/or vacuum of the packaged grains, together with the location of the load; and at least one communication module configured to receive the data from one or a plurality of sensors and configured to transmit and store the information from said one or a plurality of sensors in a cloud or any high-performance repository. Said sensors arranged in the package (34) can identify exactly how, when and where the load, that is, the packaged grains, is stored, the temperature, vacuum and pressure conditions of the grains, and also provide agile location responses for monitoring by the end client.

A grain dryer has a heated drying section with an upper plenum and a cooling section. A heater is positioned 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. A fan takes a suction from a ductwork on the heated drying section to draw a vacuum in the upper and lower plenums. Grain enters the dryer and flows into the drying section where the grain is exposed to heated air being pulled from the upper plenum into the ductwork. Grain flows from the drying section into the cooling section where the grain is exposed to cooling air being pulled through outer walls of the cooling section into the lower plenum. Grain flows from the cooling section into the unloading section.

An apparatus for drying or conditioning bulk solids, includes a housing including an inlet for receiving the bulk solids, and an outlet for discharging the bulk solids, a plurality of spaced apart heat transfer plates assemblies disposed in the housing between the inlet and the outlet for passage of the bulk solids that flow from the inlet, through spaces between the heat transfer plates, and a sweep gas delivery system for the flow of sweep gas in a first direction across the direction of flow of the bulk solids. The sweep gas delivery system includes at least one valve for reversing the flow of the sweep gas from the first direction to a second direction, opposite to the first direction.

A grain dryer has a heated drying section with an upper plenum and a cooling section. A heater is positioned 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. A fan takes a suction from a ductwork on the heated drying section to draw a vacuum in the upper and lower plenums. Grain enters the dryer and flows into the drying section where the grain is exposed to heated air being pulled from the upper plenum into the ductwork. Grain flows from the drying section into the cooling section where the grain is exposed to cooling air being pulled through outer walls of the cooling section into the lower plenum. Grain flows from the cooling section into the unloading section.

A heater, especially an oilseed heater (15) comprising an insulated jacket (2) which contains a material inlet (3), a material outlet (4), a heating medium inlet (5) and an air outlet (6) and where at least one exchanger (7) for condensation of evaporation residues is arranged inside the insulated jacket (2) and connected with the source (1) of the evaporation residues.