Abstract: An improved, long-life grate bar for use in the traveling grate bar mechanism of a solid-fuel-burning furnace apparatus and having hard wear pad inserts which are disposed within the end portions of the grate bar which ride along support rails. The wear pad inserts can be fabricated from a hard nickel-steel alloy material and can be integrally formed in the grate bar.

Abstract: An improved, long-life grate bar for use in the traveling grate bar mechanism of a solid-fuel-burning furnace apparatus and having hard wear pad inserts which are disposed within the end portions of the grate bar which ride along support rails. The wear pad inserts can be fabricated from a hard nickel-steel alloy material and can be integrally formed in the grate bar.

Abstract: An oscillating damper and air-swept distributor is disclosed for controllably introducing solid fuel into a furnace. The oscillating damper having an oscillating valve member, which oscillates between a first adjustable position and second adjustable position. The air-swept distributor preferably has a pivotably adjustable trajectory plate.

Abstract: A combination mechanical/pneumatic fuel feeder for feeding particulate fuel into a furnace and having a closely coupled hopper, fuel metering device, rotor and air swept delivery plate.

Abstract: A furnace having an ash discharge system which collects and receives siftings falling from portions of the incinerator grate and at the same time provides for controlled emission of air for combustion of the fuel to separate sections of the grate independently. The siftings removal system includes a hopper for receiving siftings that also forms part of an air plenum for directing and controlling the flow of combustion air to the furnace. A rotating conveyor is disposed within the hopper for removing ash from the hopper. An air seal divides the hopper into separate air chambers, each of the chambers being independently supplied with a source of pressurized air. The system also includes a means to separately control the air supply to each chamber.

Abstract: An air swept fuel feeder for feeding particulate fuel into a furnace and having a closely coupled hopper, fuel metering device and air swept delivery plate. An alternate embodiment is disclosed in which a second fuel is delivered to the furnace by an air swept plate.

Abstract: A metering feeder for delivering solid fuels, such as municipal or industrial refuse, for combustion includes a pair of generally vertically arranged hoppers. An upper hopper containing relatively compacted or intertangled fuel discharges metered amounts of fuel into a lower hopper through the action of a ram-type pusher. Fuel discharged from the upper hopper is dropped into the lower hopper to develop sufficient kinetic energy to decompact the fuel. An upwardly inclined conveyor removes fuel from the lower hopper at an independently metered rate under optional control of a combustion control system. The action of the inclined conveyor further decompacts the fuel by underraking and mixing, thereby providing a well controlled, uniform, loose density fuel for combustion. The conveyor has a closed course of cleats which cyclically moves to remove fuel. The cleats extend in acute angular relation to the direction of movement for improved performance.

Abstract: A metering feeder for delivering solid fuels, such as municipal or industrial refuse, for combustion includes a pair of generally vertically arranged hoppers. An upper hopper containing relatively compacted or intertangled fuel discharges metered amounts of fuel into a lower hopper through the action of a ram-type pusher. Fuel discharged from the upper hopper is dropped into the lower hopper to develop sufficient kinetic energy to decompact the fuel. An upwardly inclined conveyor removes fuel from the lower hopper at an independently metered rate under optional control of a combustion control system. The action of the inclined conveyor further decompacts the fuel by underraking and mixing, thereby providing a well controlled, uniform, loose density fuel for combustion. The conveyor has a closed course of cleats which cyclically moves to remove fuel. The cleats extend in acute angular relation to the direction of movement for improved performance.

Abstract: A metering feeder for delivering solid fuels, such as municipal or industrial refuse, for combustion includes a pair of generally vertically arranged hoppers. An upper hopper containing relatively compacted or intertangled fuel discharges metered amounts of fuel into a lower hopper through the action of a ram-type pusher. Fuel discharged from the upper hopper is dropped into the lower hopper to develop sufficient kinetic energy to decompact the fuel. An upwardly inclined conveyor removes fuel from the lower hopper at an independently metered rate under optional control of a combustion control system. The action of the inclined conveyor further decompacts the fuel by underraking and mixing, thereby providing a well controlled, uniform, loose density fuel for combustion. The conveyor has a closed course of cleats which cyclically moves to remove fuel. The cleats extend in acute angular relation to the direction of movement for improved performance.

Abstract: A metering feeder for delivering solid fuels, such as municipal or industrial refuse, for combustion includes a pair of generally vertically arranged hoppers. An upper hopper containing relatively compacted or intertangled fuel discharges metered amounts of fuel into a lower hopper through the action of a ram-type pusher. Fuel discharged from the upper hopper is dropped into the lower hopper to develop sufficient kinetic energy to decompact the fuel. An upwardly inclined conveyor removes fuel from the lower hopper at an independently metered rate under optional control of a combustion control system. The action of the inclined conveyor further decompacts the fuel by underraking and mixing, thereby providing a well controlled, uniform, loose density fuel for combustion. The conveyor has a closed course of cleats which cyclically moves to remove fuel. The cleats extend in acute angular relation to the direction of movement for improved performance.

Abstract: A stoker construction which readily adapts to a wide variety of different sized combustion chambers, utilizing a minimum number of standarized modules. The modules may be arranged singly, or in stacked combination, around the inner perimeter of the combustion chamber wall and cooperate with the fuel supporting grate to form a baffle or movable seal. The modules provide a downwardly converging surface for containing the fuel and define an air plenum and tuyere assembly for controlled admission of overfire air to promote a robust fire and to prevent clinker and slag formation.

Abstract: A rotary continuous ash discharge stoker having a circular grate which is designed to support burning fuel as it distributes the fuel from the feedpoint over the entire grate, and at the same time provides for the controlled admission of air for combustion of the fuel and also automatically removes from the furnace the remaining ash. The upper grate surface consists of two zones, a central stationary section and an outer rotating section or ring. The central section is inclined and is the main air admitting zone. The outer rotating ring serves to distribute the fuel in the furnace with the aid of a stationary spreader arm, admits the air necessary to complete combustion of the fuel and removes the burned out ash from the furnace with the aid of a stationary ash plow.

Abstract: A multi-fuel feeder distributor for a stoker capable of feeding into a furnace and distributing over a grate or hearth, coal and a second fuel, such as wood or a waste fuel, either in combination or separately, comprising a coal feed and a second fuel feed having outlet spouts discharging into a single feed throat into the furnace. Coal is fed from a coal hopper at a continuous controlled rate to a distributor portion of the coal feeder which mechanically throws the coal into the furnace and distributes it evenly over the entire grate surface. The second feeder, an air swept waste fuel feeder, may be used at the same time to feed waste fuel in combination with the coal without interfering with the operation of the coal feed. Water-cooling is used at the feed throat along the furnace wall.