Abstract: A furnace blower assembly comprising a fan housing, a fan, a motor, and a diverter. The housing defines an interior compartment, at least one air inlet, and a diverter receiving opening adapted to receive a portion of the diverter. The diverter has an air directing ramp and a discharge port. The diverter receiving opening and the diverter are adapted such that at least a portion of the air directing ramp is within the interior compartment of the housing. The air directing ramp is adapted to change direction of air flowing through the diverter receiving opening.

Abstract: A grate step module (1) for a thrust combustion grate for the combustion of refuse in a large-scale plant has a carrier part (2) for the grate steps (3, 4), exactly one fixed grate step (3) and exactly one movable grate step (4) and also a grate step drive. The movable grate step (4) is displaceable back and forth with respect to the fixed grate step (3) by way of the grate step drive. The grate step module (1) is connectable in a row with further grate step modules (1) without a gap and in this way forms the thrust combustion grate.

Abstract: The invention pertains to a burner for solid fuel, said burner comprising: A stoker (41) having a fuel outlet (29) within said burner, and an exhaust (31), a grate (27) positioned below said fuel outlet (29) and between said fuel outlet (29) and said exhaust (31), a first blower (92) connected to a space below said grate (27), and a second blower (68) connected to a plurality of injectors (61A, 62A) provided around said fuel outlet (29) above said grate (27) and directed towards said exhaust (31), said injectors (61A, 62A) being parallel and unidirectionally directed over said grate (27), and wherein the injectors (61A, 62A) are provided along the periphery of said burner, said injectors (61A, 62A) being configured for injecting secondary air at a speed of 40-80 m/s, thereby ensuring unidirectional parallel flows of secondary air over said grate (27).

Abstract: Device for heating air during the duty cycle of a heating boiler fired in particular by solid fuel or biomass, composed of a conduit for supplying air to the furnace and a conduit for outflow the exhaust gas from the heating boiler into the flue. The device has the closed exhaust gas conduit (2) which over the length of its connection with the flue (8) is shaped resembling a cosine curve with advantageously vertical exhaust gas conduits (4) adhered to the vertical air conduits (11) which over the length of the air conduit (3) have a shape resembling a sine curve, and on the last vertical conduit (5), where the end section (7) of the exhaust gas conduit (2) is guided to the flue (8), there is a pumping fan (6).

Abstract: A method and portable apparatus is described for the conversion of cellulose and other blomass waste materials through a pyrolysis and partial combustion sequence in a downdraft gasifier to produce a gas which can be immediately utilized to fuel an internal combustion engine in a generator set (genset). More specifically, the heat from the combustion of part of the cellulosic or other waste input is used to pyrolyze the remainder of the input to produce a mixture of permanent fuel gases. Particulates are removed (water scrubbers, filters) from the gas mixture which can then be used directly as a major part of the fuel to operate the internal combustion engine in the genset. All movement into, through, and out of the gasifier and purification train is controlled by the vacuum associated with the intake of the internal combustion engine, thereby ensuring a steady production of electricity.

Abstract: An induced draft stove has a housing in which a food-supporting grate is disposed above a solid fuel-supporting grate. Burning solid fuel within the stove creates an induced flow of ambient combustion air to the fuel which is sequentially drawn into a pair of manually dampered inlet plenum boxes carried by the housing, through an air supply manifold, and into the open ends of a laterally spaced series of horizontally extending air delivery tubes which are removably positioned within the housing beneath the fuel grate. Combustion air entering the tubes is drawn downwardly through bottom outlet openings therein, flowed upwardly along lower exterior surface portions of the tubes, through the spaces between adjacent tube pairs, and then upwardly to the burning fuel. Upper side portions of the tubes shield the bottom outlet openings therein to prevent ash and other fuel bits falling from the fuel grate from clogging these outlet openings.

Abstract: A wood-burning furnace including a combustion chamber having a novel combustion air distribution system including jets whereby air is delivered only to a limited portion of the area of the fire bed, and whereby clogging of the jets by the large quantities of wood ash is prevented, the combustion air being delivered by a thermostatically controlled blower and damper system such that the heat delivered by the furnace may be controlled and regulated with substantially the same degree of accuracy as that obtainable with gaseous and liquid fuels.

Abstract: A new furnace is provided which employs a forced draft to efficiently and cleanly burn a wide variety of fuels such as wood and refuse. The furnace is designed to internally and continuously pyrolyze (gasify) fuel prior to the burning phase which is conducted in a lower chamber of the furnace where air is admitted at a controlled rate. Combustion temperature is maintained at 1800.degree. F. or higher to completely burn gasified fuel by enclosing the burning zone with refractory material and by not extracting sensible heat from the combustion region until after exhaust gases exit the lower chamber. Ash is produced in a fine powder as a consequence of its being removed from the combustion effluent by gravity and cyclonic (i.e. turbulent) separation.