Abstract: A filtration apparatus is disclosed. The filtration includes a housing with an exhaust passage; and a filter screen supported within the exhaust passage. An operating linkage moves the filter screen between first and second configuration. In the first configuration, the exhaust flow passes through the filter screen in the flow direction from a first side to a second side of the filter screen. In the second configuration, the exhaust flow passes through the filter screen in the flow direction from the second side to the first side of the filter screen. The operating linkage allows convenient and optional automation of the reversal of the flow direction through the filtration screen so that the filter screen is self cleaning.

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 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 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.

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.