Abstract: Active rice husk ash is produced by a method which includes placing a hollow platform having many holes of a size too small for rice husk to enter on an enclosed floor slab, erecting a chimney on the hollow platform in communication with the interior of the hollow platform, forming a cone of rice husk around the chimney to completely cover the hollow platform, igniting the rice husk at the small holes for smolderingly incinerating the rice husk into carbonized rice husk, and allowing the carbonized rice husk to self-burn into ash.

Abstract: This patent discloses a secondary fluid supply system for a steam generator used in nuclear reactor power plants. The secondary fluid supply system comprises a secondary fluid (feedwater) inlet nozzle near the base of the steam generator shell, a feedwater riser pipe spaced between the shell of the steam generator and the tube bundle wrapper, the upper end of the feedwater riser pipe being connected to a distribution ring having a plurality of spray nozzles positioned in the recirculating pool above the top of the U-shaped heat exchanger tubes.

Abstract: A burner and port combination for the combustion of a pulverized coal fuel plus air mixture comprises a throat and a burner nozzle positioned at a central area of the throat. The burner nozzle has an inlet for receiving the pulverized coal fuel plus air mixture and an outlet for discharging the pulverized coal fuel plus air mixture. A secondary air tube is positioned laterally adjacent the burner nozzle at each lateral side of the nozzle in the throat for providing a first portion of a secondary air to the throat. A plurality of vanes are positioned at an upper portion of the throat above the burner nozzle and the tubes and at a lower portion of the throat below the burner nozzle tubes for deflecting a second portion of the secondary air from the burner nozzle.

Abstract: An incinerator for combustible or thermally-decomposable gases includes a device which insures that gas continues to flow through the incinerator in the event of failure of the scrubber fan connected to the outlet of the incinerator. When the scrubber fan fails, a solenoid-operated valve opens, and compressed gas from a tank flows through the valve into the main conduit of the incinerator. The compressed gas enters the main conduit through an air flow amplifier installed within the main conduit. The air flow amplifier magnifies the effect of the compressed gas, and creates a region of negative pressure which assures that toxic or hazardous gases do not remain in the incinerator, but instead continue to flow toward the scrubber fan, even after the fan has failed.

Abstract: A method of utilizing the high energy values of fossile fuels in central heating boiler systems. The boiler system comprises a processor which includes an air heat pump (5) which functions to cool the system flue gases by condensation. A first fan (10) generates a first circulation (C.sub.1) of boiler room air, via the air heat pump (5), this circulation of air also passing through a heat exchanger (4) where heat exchange takes place with the flue gases. A second air circulation (C.sub.2) is generated with the aid of a flue-gas fan (7) which removes flue gases from the boiler by suction, thereby generating a subpressure in the boiler room so that fresh air will be drawn in from the ambient surroundings, this air passing through the heat exchanger (4). A lower pressure is maintained on that side of the heat exchanger (4) on which the air/flue gas mixture (C.sub.

Abstract: A technique for decontaminating material, including disposing a grid network of perforated pipes on a base, and covering the same with contaminated soil. A barrier layer is laid on the contaminated material and provided with a vent port coupled to a vapor disposal unit via a suction system. A source of heated gas is coupled to the grid system to force heated air through the contaminated soil and vaporize the contaminants. A mobile decontamination system includes an insulated container having a top lid for loading contaminated material in the container, and an insulated back door for removing decontaminated material. Apertured pipes on the container floor convey a high temperature gas to the contaminated material to vaporize the contaminants. A suction system is coupled to a vapor outlet of the container to remove vaporized contaminants.

Abstract: A tankless, flow-through electric water heater whose housing is designed for modular application, where serially connected modules define the path of the fluid being heated, in this case water, through the heater from inlet to final outlet. Each module contains two separate chambers and each chamber is provided with an electric immersion type heating element. The first and last chambers will also have a temperature sensor which will signal an electronic temperature control system. The temperature sensor in the first and last chambers provides signal inputs to energize each heating element of each chamber for a period of time proportional to the temperature difference between first chamber and the desired set leaving temperature of the water, which is set by an adjustable temperature controller (potentiometer), included in this control system. This control system also has a minimum setting point for a "no flow" condition or for the prevention of water freezing, where extreme weather conditions exist.

Abstract: The disclosure is directed to a burner-containing apparatus, such as a boiler or a furnace, having reduced noxious emissions. A burner receives input air and has an exhaust for exhausting flue gases. A flue gas recirculation system is provided for recirculating a portion of the flue gases back to an input of the burner. A fogging device, which produces a fog from a fogger water supply and a fogger air supply, humidifies the recirculated flue gases.

Abstract: A staged fluidized-bed combustion and filter system for substantially reducing the quantity of waste through the complete combustion into ash-type solids and gaseous products. The device has two fluidized-bed portions, the first primarily as a combustor/pyrolyzer bed, and the second as a combustor/filter bed. The two portions each have internal baffles to define stages so that material moving therein as fluidized beds travel in an extended route through those stages. Fluidization and movement is achieved by the introduction of gases into each stage through a directional nozzle. Gases produced in the combustor/pyrolyzer bed are permitted to travel into corresponding stages of the combustor/filter bed through screen filters that permit gas flow but inhibit solids flow. Any catalyst used in the combustor/filter bed is recycled. The two beds share a common wall to minimize total volume of the system. A slightly modified embodiment can be used for hot gas desulfurization and sorbent regeneration.

Abstract: In an incinerator having a housing structure defining a combustion chamber provided with a pair of side walls, a stoker disposed in the combustion chamber between the side walls and an underfire air system, an overfire air system generally consisting of a first means for injecting a variable volume of air under pressure into the combustion chamber at a level above the stoker, and second means for injecting a variable volume of air under pressure into the combustion chamber at a level above the stoker, a second variable volume air injecting means including means for conveying air supplied to the combustion chamber in heat exchange relation with at least one side wall of the combustion chamber for cooling such wall.

Abstract: In a steam generator or boiler used in a nuclear reactor, the secondary water is supplied via at least one pipe (48) issuing directly into the bottom of an annular recirculation space (32) formed between the outer envelope (10) and an inner envelope (26) surrounding inverted U-tubes (24), on the side of the cold branches of the tubes. A perforated collar or flange (56) placed in the annular space (32), above the pipe (48), produces a pressure drop or flow limitation preventing the rise of the feed water and controls the circumferential distribution of the recirculation water, which drops from the separators (28).

Abstract: A method and apparatus for gasifying tires comprises a housing divided into a tire hopper and vaporization chamber into which air and combustible fluid are inserted through intake manifolds to initially combust and thereafter oxidize tires placed in the housing. Oxidation results in volatile gases and solid residue. The latter is removed through a hatch in the vaporization chamber and the former is shunted to a mixing chamber which comprises an outer compartment, a middle compartment, and an inner compartment. The middle compartment receives the volatile gases which are then mixed with air in the outer and inner compartments. The mixture is combusted with the aid of a combustible fluid mixed in and thereafter shunted to a combustion chamber which further mixes the combustible fluid by means of baffles to thoroughly combust the mixture.

Abstract: This invention relates to a combustion chamber and a method for burning waste material, such as waste oil, hazardous chemicals, and municipal garbage or trash, in a manner which generates very little smoke, particulate matter, unburned hydrocarbons, or potentially hazardous fumes in the exhaust gases. The combustion chamber is enclosed within an outer wall which provides an inlet for air, fuel, and burnable waste material, and an outlet for exhaust gases. Enclosed within the outer wall is an annular wall, which divides the chamber into a central burning region inside the annular wall, and an annular space between the outer wall and the annular wall. The central burning region contains a primary burning zone, while the annulus space carries a portion of the inlet air along the length of the chamber.

Abstract: A retractable sootblower is provided with means for preheating the sootblower lance prior to introduction of blowing medium into the lance to prevent condensation of the blowing medium which would be subsequently discharged from the lance against internal boiler surfaces accelerating surface erosion. The sootblower of the present invention preheats the lance by only providing blowing medium to the lance after at least a portion of the lance has been extended into the boiler and heated by hot boiler gases to thereby prevent condensation of the blowing medium within a cooled lance.

Abstract: An ash melting furnace for heating and melting ashes by a burner. The furnace body is formed with a preheating chamber and a melting chamber. Of the bottom wall of the melting chamber (12), the portion closer to the charging port is convex in transverse cross section, while the portion closer to the discharging port is concave in transverse cross section.

Abstract: A device for indirectly heating fluids, particularly for high temperature processes, includes a heating space in which at least one tube coil is arranged. The tube coil is constructed in a planar manner and the fluid to be heated can be conducted through the tube coil. Heat radiators act from the outside on the tube coil. The heat radiators have a heat radiation surface shaped corresponding to the planar extension of the tube coil. The heat radiators are arranged on opposite sides of the tube coil. Longitudinal ribs are provided on two opposite sides of the tube of the tube coil with respect to the tube cross section.

Abstract: A method and a device for using excess heat of flue gas that is not required for operating a flue gas desulfurization device of a power plant is presented. Before being introduced into the flue gas desulfurization device. The flue gas is guided through preheaters for heating the combustion air and an electrostatic filter. The combustion air preheating step is achieved with two air preheaters, one arranged upstream of the electrostatic filter and one arranged downstream of the electrostatic filter. A partial flue gas stream is branched off at least before the first air preheater arranged upstream of the electrostatic filter. The partial flue gas stream is used to generate steam.

Abstract: A sulfur trioxide conditioning system includes a catalytic converter that converts a portion of the sulfur dioxide in a flow of flue gas to sulfur trioxide. The catalytic converter includes a catalyst support, which is disposed across at least a portion of the cross section of a main duct from a burner to a heat recovery apparatus, and a catalyst on the catalyst support. The amount of the catalyzed surface exposed to the flow of flue gas is selectively varied to control the conversion of sulfur dioxide to sulfur trioxide.

Abstract: An apparatus for removing sludge from the tubes and tubesheet of a steam generator. A support structure is adapted to be mounted at an access port of a steam generator. A lance tube extends from the support structure into the steam generator. A spool attached to a high pressure hose is received in the lance tube. A pinch roller assembly mounted on the support structure is used to move the cylinder through the lance tube. High pressure water flows through slots drilled in the spool and out holes in the lance tube against the tubes and tubesheet. A rocker motor causes back and forth rotation or rocking of the lance tube to create a sweeping action. The lance tube may also be adjusted axially to insure that the water streams are directed to the tube lanes.

Abstract: An incinerating furnace, such as a cremation furnace or other batchwise chargeable furnace, is arranged with a main combustion chamber (1), from which the fumes are adapted to be led away through a following chamber arrangement (6-17) connected with a flue.