Abstract: A burner system for consumption of waste fuel comprises a screw conveyor having a longitudinal hollow interior for air distribution and radially disposed air intake orifices connecting the hollow interior to a plurality of combustion chambers, which includes a first combustion chamber disposed centrally around the screw conveyor and at least one orifice; a second combustion chamber disposed concentrically around the first combustion chamber, receiving burning waste fuel from the first combustion chamber, and in fluid communication with the air intake orifice to provide air from an air blower through the orifice; and a third combustion chamber disposed concentrically around the second combustion chamber, receiving waste fuel from the second combustion chamber, and in fluid communication with the air intake orifice to provide air from the air blower.

Abstract: The invention relates to solid fuel units having a fuel supply chamber wherein the fuel to be sent for combustion to the combustion region found in the body is placed and the feed mechanism carrying the solid fuel found in the chamber forward. It is characterized in that it includes a main burning block having a fuel and air cell connected to the solid fuel supply chamber and air outlet vents formed on the external wall surface. A preventive surface is positioned on the main burning block external wall surface in a way that it would form a closed volume in a certain distance.

Abstract: A burner system for consuming waste fuel comprises a combustion unit having at least three combustion chambers arranged concentrically around a variable speed conveyor screw for directing the waste fuel along a fuel consumption path through the combustion chambers; an air chamber surrounding the combustion chambers to facilitate preheating combustion air delivered to the combustion chambers and to facilitate insulating the combustion chambers against thermal losses to the environment; a boiler in fluid communication with the combustion chambers for heating fluid to facilitate an energy conversion process; and an intelligent control system for controlling operation of the burner system. The control system controls operating parameters of the boiler including pressure, temperature and fluid level and activates an emergency stop alarm if any one of the operating parameters is outside a predetermined range of operating values.

Abstract: A burner system for consumption of waste fuel comprises a screw conveyor having a longitudinal hollow interior for air distribution and radially disposed air intake orifices connecting the hollow interior to a plurality of combustion chambers, which includes a first combustion chamber disposed centrally around the screw conveyor and at least one orifice; a second combustion chamber disposed concentrically around the first combustion chamber, receiving burning waste fuel from the first combustion chamber, and in fluid communication with the air intake orifice to provide air from an air blower through the orifice; and a third combustion chamber disposed concentrically around the second combustion chamber, receiving waste fuel from the second combustion chamber, and in fluid communication with the air intake orifice to provide air from the air blower.

Abstract: The present invention provides a burner system which uses waste fuels, especially waste plastic fuels. Burner size is minimized by having multiple combustion chambers concentrically located around a rotating screw conveyor. Heat efficiency is improved by having air passages disposed around the combustion chambers, thus preheating air for the combustion prior to its delivery to the combustion chambers, while simultaneously thermally insulating the combustion chambers against the environment. Waste fuel is transported from a fuel hopper to the combustion chambers by a rotating screw conveyor having the spiraling auger blades. Speed of screw conveyor rotation controls the consumption of waste fuel and, thus, the amount of thermal energy generated in the burner. The burner system includes an intelligent control system for controlling operation of the burner system, so that the burner system performs at optimum efficiency, safely and with minimum operator intervention.

Abstract: The present invention provides a burner system which uses waste fuels, especially waste plastic fuels. Burner size is minimized by having multiple combustion chambers concentrically located around a rotating screw conveyor. Heat efficiency is improved by having air passages disposed around the combustion chambers, thus preheating air for the combustion prior to its delivery to the combustion chambers, while simultaneously thermally insulating the combustion chambers against the environment. Waste fuel is transported from a fuel hopper to the combustion chambers by a rotating screw conveyor having the spiraling auger blades. Speed of screw conveyor rotation controls the consumption of waste fuel and, thus, the amount of thermal energy generated in the burner. The burner system includes an intelligent control system for controlling operation of the burner system, so that the burner system performs at optimum efficiency, safely and with minimum operator intervention.

Abstract: The present invention provides a burner which uses solid fuels, especially waste plastic fuels. Burner size is minimized by having multiple combustion chambers concentrically located around a rotating screw conveyor. Heat efficiency is improved by having air passages disposed around the combustion chambers, thus preheating air for the combustion prior to its delivery to the combustion chambers, while simultaneously thermally insulating the combustion chambers against the environment. Waste plastic is transported from a fuel hopper to the combustion chambers by a rotating screw conveyor having the spiraling auger blades. Speed of screw conveyor rotation controls the consumption of waste plastic and, thus, the amount of thermal energy generated in the burner.

Abstract: A gasifier and gasifier system based on the gasifier, which contains as a major component, a novel feed system for feeding organic materials into the burn pile of the gasifier. The gasifier feed system is a horizontal auger driven feed system that feeds directly through a ceramic elbow into the furnace without having to auger the feed through significant vertical elevations.

Abstract: A feeder for feeding bulk material into a high pressure conveying line. The feed assembly comprises a rotary feeder that has a material inlet for receiving bulk material from a low pressure source and a material outlet for discharging the bulk material into a higher pressure conveying line which is a source of leakage gas into the rotary feeder. The feeder has venting means to vent leakage gas through the material inlet without such leakage gas contacting the bulk material entering the feeder.

Abstract: A roller grate consists of rollers disposed one behind the other by means of which the material to be burned is moved, and of a drive for the rollers that constitutes a hydraulic motor for driving one or several rollers. A method for operating the roller grate consists of operating the hydraulic motor in angular steps. The roller grate has the advantage that roller grates having low-weight drive units can be operated with high reliability and with little wear of the drive units.

Abstract: An apparatus and method are for the pyrolysis of waste. The aparatus has a rotating cell formed of a cylinder in combination with a truncated cone rotating on the same axis. The apparatus also has a hopper for charging the waste at one end of the cylinder, an ash box at the other end of the cylinder, a gas recuperator, and a retaining threshold between the cylinder and the truncated cone. A region of intimate contact of the waste with itself is created, whereby the waste is converted into coke which is used as fuel in the pyrolysis of the waste.

Abstract: A process and system for the recovery of desirable constituent materials from vehicle tire pieces through pyrolysis. The system includes a pyrolysis section that is divided into a plurality of individual heating zones. Each of the heating zones is heated to a distinct operating temperature that is independent from the operating temperature of the remaining heating zones. Vehicle tire pieces are fed into the infeed end of the pyrolysis section by a rotatable feed cylinder that includes a screw-like flight extending from the inner wall of the feed cylinder. As the feed cylinder rotates, the flight directs the supply of vehicle tire pieces into the infeed end of the pyrolysis section. The pyrolysis section includes a rotary kiln that is divided into the plurality of heating zones.

Abstract: A water-cooled firing grate made up of grate bar blocks extending over the width of the grate and each having a plurality of grate bars mounted on a grate bar carrier and interconnected by connecting pieces communicating between meandering shaped channels in the grate bar and a pair of end pieces forming an inlet and an outlet at the outer boundaries of the block and connected to an inlet and an outlet for the cooling water. The pieces are so fixed to the bars that they maintain a clearance between the bars of 1 to 1.5 mm.

Abstract: A roller grate arrangement for garbage-incinerating plants, in which a plurality of rollers with horizontal and parallel axes lie in an inclined plane. Primary air is fed to interiors of the rollers by air boxes located below the grate. The rollers have surfaces with air gaps for supplying the primary air, and the rollers are positioned to form a space between adjacent rollers. A component in the space between adjacent rollers, bridges the space between adjacent rollers. The component is free of air passages. Blast pipes are positioned in spaces between adjacent rollers and are connected to a separate system for feeding supplemental air.

Abstract: A roller grate arrangement for garbage-incinerating plants, in which a plurality of rollers with horizontal and parallel axes lie in an inclined plane. Primary air is fed to interiors of the rollers by air boxes located below the grate. The rollers have surfaces with air gaps for supplying the primary air, and the rollers are positioned to form a space between adjacent rollers. A component in the space between adjacent rollers bridges the space between adjacent rollers. The component is free of air passages. Blast pipes are positioned in spaces between adjacent rollers and are connected to a separate system for feeding supplemental air.

Abstract: In a combustion system for particulate fuel including a combustion chamber with an opening at the base of the combustion chamber and a vertical discharge duct pushing the particulate fuel through the opening there is provided a hopper spaced from the combustion chamber and a transportation duct for carrying the particulate fuel from hopper to the discharge duct. In the transportation duct there is provided an auger shaft with a first long auger flight rotated to carry the material from the hopper to the discharge duct. A second shorter flight is arranged on a side of the discharge duct opposite to the hopper in a short tube portion and is rotated in the direction to feed the material back toward the discharge duct. The two flight portions cooperate in pushing the material into the vertical discharge duct as the shaft of the flight is rotated.

Abstract: A cylinder grate for incinerators, especially garbage incinerators, with hollow grate cylinders (1). The cylinders are positioned separated and axially parallel along a slanted plane (3). There is a gap between each pair of cylinders and accommodating strippers (5). The strippers are secured to stripper holders (6) below the gap. Components (11) swing back and forth below the strippers and are resiliently forced against the overall length of the cylinder.

Abstract: A heater for burning particulate combustible fuel material, and a stoker for transferring the fuel for use in connection with such a heater. The heater includes a burner with a step upward from the stoker onto the burner, for reducing the possibility of the fire burning back into the supply of fuel. The stoker includes a first conveyor and a second conveyor, spaced vertically apart and connected together by a drop box. A drive arrangement for driving the conveyors includes a prime mover connected to the first conveyor by means of a drive shaft and to the second conveyor by an intermittent drive. The intermittent drive includes a second shaft with a plurality of paddles extending radially outwardly therefrom. In one embodiment, one or more paddles are removably affixed to the first shaft and extend radially outward therefrom. Thus rotation of the first shaft causes rotation of the second shaft only when the paddles are in contact.

Abstract: A bar for a rotary grate is of T-section and has an enlarged head and a fin projecting inwardly therefrom. The head is formed with an end face directed outward from the fin and a pair of substantially parallel side faces extending inward obliquely from the end face. The side faces extend at an angle of between 40.degree. and 75.degree., preferably about 60.degree., to the end face. Thus air exiting from inside the roller-grate drum flows obliquely to a radius from the drum-rotation axis. This ensures that even if the material being burned does not form a continuous layer on the surface of the roller, the air will be likely to impinge this material. The fin extends generally centrally from the head and has a centerline that generally bisects the head. The bar has ends formed with blocks projecting to opposite sides of the bar so that blocks of adjacent bars can interfit.

Abstract: A furnace grate roller, mainly for incinerating refuse, with a tubular casing formed by rings of bars separated by blow gaps of set width, is of conventional structure, comprising a cylindrical cage framework with T-shape cross-section longitudinal members disposed along its generatrices and a casing formed of groups of rings separated by gaps for blowing combustion-supporting air. The rings are segmented into arcuate bars which extend between the longitudinal members. To limit relative movement of the bars while allowing them some play the bars are attached at one end by a notch to the flange of a longitudinal member and are secured in place by bosses on an intermediate member bolted longitudinally to the longitudinal member. The bars have recesses at their end contiguous with the intermediate member into which the bosses are inserted. In this way the bars are attached with limited capacity for movement relative to the roller in the axial, radial and peripheral directions.

Abstract: A roller grate incinerator cooperatively associated with a waste heat boiler, wherein a plurality of cylindrical shaped water cooled roller grates are disposed on an incline to form a undulating water cooled surface upon which a bed waste is laid and burned as the roller grates turn moving the burning waste along the undulating surface, which has a plurality of perforations through which combustion air is supplied to the underside of the bed to facilitate burning of the waste and the flow of hot gases through the waste heat boiler.

Abstract: The present invention discloses a rotary grate for a solid fuel fired furnace which allows ash, cinders and clinkers to be removed from the burning fuel mass, without reducing or stopping the combustion process. A plurality of parallel water cooled rolls supports the burning fuel mass. The rolls are grouped into pairs of rolls, each pair of rolls having a drive roll and a driven roll. Each pair of rolls are geared together such that rotation of the drive roll simultaneously rotates the driven roll. Each roll has a plurality of protrusions about the circumference thereof, spaced down the length of the roll. The protrusions pass, during rotation of the rolls, the protrusions on adjacent rolls in non-contacting relationship to crush any cinders, clinkers or other tramp material. This action allows ash and the crushed material to pass between the rolls to an ash collection area beneath the rolls. Each of the drive rolls are rotated by a reversible drive mechanism which incrementally rotates the rolls.

Abstract: The invention concerns a grate bar for a grate tumbler of a tumbler grate of a trash incineration installation or similar combustion facility with a base rod showing an outer rod surface and an inner rod surface, as well as side surfaces, a head surface and a foot surface, the cross-section form being T-shaped with a cross rod (15). The invention also concerns a grate tumbler for the tumbler grate of a trash incineration installation or the like with a hollow shaft and a cylindrical carrier construction, with grate-bar carriers resting upon the carrier construction and grate bars mounted upon the carriers, while the grate bars are mounted upon the grate bar carriers (8) in such fashion that the slit (25) between adjacent grate bars (11) is no greater than 1 mm in width on the combustion-chamber side.

Abstract: A tilted, fixed kiln with rotory steam gasifier having a fixed elongated, pressurizable kiln body member with an input end and an output end and with the center axis supported at an angle to the horizontal so as to bring into effect gravitational forces acting on high moisture content biomass material fed into the input end and travelling through the kiln to the output end and having in the kiln body an axially extending rotor and a motor, radially spaced-apart scoop-like blade elements extending along the axial length of the kiln for tumbling the material, means for increasing the temperature from its input to its output end, spaced-apart blades and chains disposed in the rotor kiln cavities for stirring the biomass material as it travels through the kiln to prevent agglomeration, a plurality of parallel, axially extending hot gas counter-flow feedback pipes arranged around the kiln body and along the backsides of the scoop-like blade elements, a metering auger mounted vertically to the input end of the kiln

Abstract: A self-cleaning, high heat transfer wood or coal stove includes an interior cylindrical squirrel-cage configured fuel grate comprised of parallel air-conducting pipes for heating forced cold air. This arrangement of pipes not only provides for a self-cleaning stove interior due to the cyclical condensation and combustion of deposited effluents produced by combustion, but also greatly enhances the heat transfer capability of the stove by increasing the surface area available for heat exchange. The cyclical condensation and combustion is effected by incrementally rotating the interior cylindrical fuel grate by turning, using a handle inserted into one of a plurality of rod sockets which reside on the front of the stove. The stove of this invention is constructed with separate doors for convenient fuel loading and ash removal, and the fuel loading door is disposed to engage the combustion chamber opening with an air-tight and secure fit.

Abstract: A drum-shaped grate of an incinerator includes a plurality of cylindrical drums, the grate covering of which is formed of a plurality of suspended middle grate bars which are combined in segments and arrested by fixed grate bars. The adjacent grate bars in the circular direction are suspended on bar carriers and the lateral faces of each two adjacent grate bars are spaced from each other by spacers. The surfaces of the spacers positioned between each two adjacent grate bars and abutting against each other are flat and smooth. Due to a possible relative displacement of the middle grate bars in their longitudinal direction owing to the placing of the spacers between the adjacent bars a clogging of the air slots formed between the grate bars would be prevented.

Abstract: Inerts, particularly flotation addles and/or middlings are burned as a fire material in a grate firing and form a solid slag which is mechanically comminuted during the firing process. Comminution is accomplished with grate elements which are movable with respect to the slag and which are cooled by feeding combustion air therethrough, the combustion air being directly injected from the grate elements into the firing material.

Abstract: The invention relates to heating apparatus the use of which is recommended to meet the heat demand first of all of family homes and individual flats, or a small group of them.Substance of the heating apparatus according to the invention is, that it has grate construction connected with actuating mechanism, the open, hollow grate elements of which provided with air outlet openings at least at one of their ends are arranged along endless surface, furthermore it has air inlet head fitted to at least one of the front ends of the grate construction.It is advisable to form the grate elements from tubes and to arrange them along cylindrical surface.

Abstract: A solid fuel furnace includes a combustion chamber and an elongated grate trough extending below the combustion chamber for charging the solid fuel into the chamber. A tube extends within the grate trough so that the axis of the tube is parallel to that of the trough, the tube being supported at the ends of the chamber for rotation about the tube axis. Blade members are provided on the outer circumferential surface of the tube to convey the solid fuels introduced into the furnace in the axial direction of the tube as the tube is rotated. The blade members have radially extending openings which communicate with the interior of the tube, and combustion air is supplied to the tube interior at one end of the tube so that the combustion air is introduced into the combustion chamber through the blade members as the tube rotates. Accordingly, both solid fuel and combustion air are charged into the combustion chamber at a desired rate by the rotating tube and blade members.