Abstract: A heating apparatus for supplying heated air to a grain dryer or the like. The apparatus features a biomass furnace with a burn chamber for combustible biomass material, a chimney having a lower end in fluid communication with the burn chamber interior, and air ducting that has a fresh air inlet, an output end connected to the dryer, and directs heated exhaust air from the chimney to the dryer. An airflow control system is configured to both control airflow to the dryer through the air ducting, and control a temperature of said airflow by varying a ratio between the fresh ambient air and the heated exhaust air. The burn chamber has a chain gate with overbed and underbed circulation fans that generate airflow up through the chain grate, as well as tumbling air currents above the chain grate for thorough combustion and cleaner exhaust that won't contaminate the grain.

Abstract: A dehydrator apparatus for dehydrating biological material. The apparatus includes an external housing, and a vessel supported within said external housing and spanning in a longitudinal direction thereof in elevated relation from a bottom of the housing. A loading inlet feeds into said vessel from outside the housing for admission of biological material. An air intake feeds into the housing to deliver heated air thereto from a hot air source, and air routing components within the external housing guide the heated air into heat exchange relationship with the vessel itself, and also into heating and aerating exposure to contents of said vessel. An agitator is installed in operable relation to the vessel to agitate the material fed thereinto via the material inlet. An exhaust outlet exhausts the heated air from the housing after having heated and aerated the vessel and its contents.

Abstract: A heating apparatus for supplying heated air to a dryer for grain or other particulate materials. The apparatus features a biomass furnace with a burn chamber for combustible biomass material, a chimney having a lower end in fluid communication with the burn chamber interior, and air ducting that has a fresh air inlet, an output end connected or connectable to the dryer, and is in in fluid communication with the chimney to enable redirection of said heated exhaust air from the chimney to the dryer via the air ducting. An airflow control system is configured to both control airflow to the dryer through the air ducting, and control a temperature of said airflow by varying a ratio between the fresh ambient air and the heated exhaust air.

Abstract: A system for treating exhaust gas generated by combustion of biomass comprises a frame, a first cyclonic separation stage supported on the frame and comprising a plurality of parallel gas cyclones in fluidic communication with an inlet receiving the exhaust gas for removing from the exhaust gas particulate matter exceeding a first threshold size, and a second bag filtration stage supported on the frame and comprising a plurality of serially-communicated baghouses each comprising a plurality of bag filters therein for removing, from the partially treated exhaust gas received from the first cyclonic separation stage, particulate matter exceeding a second threshold size that is smaller than the first size which was passed through the first treatment stage. The gas cyclones of the first stage are arranged in a laterally extending row across the frame and the baghouses are arranged in a longitudinally extending row across the frame.