Abstract: In the process for burning combustibles, in particular garbage and refuse, on a furnace grate, the combustion regulation on the furnace grate is carried out in such a way that the ash developing at the end of the furnace grate has a temperature lying just below the melting point of the ash. The combustion regulation is preferably monitored by an infrared camera and influenced appropriately. In order to achieve the desired temperature, the combustion air is advantageously mixed with oxygen and/or preheated.

Abstract: In the installation for decontaminating a liquid effluent contaminated by at least one organic substance, a gaseous combustible is burned in a reactor to produce a flame containing hydroxyl free radicals OH.degree. and oxygen O.sub.2 and that flame is centered on the geometrical axis of the reactor. A helical flow of liquid effluent is produced on the inner cylindrical wall of the reactor to cause a direct contact between the hydroxyl free radicals and the organic substance contaminating the liquid effluent. Having hydroxyl free radicals present, the organic substance is oxidized in liquid phase. The high temperature of the flame enables completion of the oxidation of the organic substance, in liquid phase, by means of the oxygen O.sub.2 present in the flame. At the outlet of the reactor, the liquid and gaseous products are separated; the liquid product is collected while the gaseous product is evacuated.

Abstract: The method and equipment are proposed for wastes thermal destruction on the surface of a bath of melted metal and slag with a heating in plasma jets and the off-gas bubbling through a bath of melted slag, including a plasma hose generated in waste introduction zone which prevents the coming waste from contact with cooled units of the facility; thus, the reliable destruction of bacteria contaminated and toxic wastes are provided. The plasma hose is generated by the coaxial plasma torch with the hollow central electrode through which the wastes are fed. The units for a regular bacteriological examination of waste treatment products are also provided when the processed wastes are infectious wastes generated by medical and veterinary institutions.

Abstract: A heating and incineration device includes a heating chamber for being connected to a heating application. A process stream is recirculated between the heating chamber and the heating application. An incineration tube is positioned into the heating chamber for providing the only exit for gases from the heating chamber and the heating application. A heat source is positioned within the heating chamber in spaced coaxial relation with an incineration tube inlet. The process stream is heated to a working temperature when it is passed through the heating chamber around the periphery of the heat source. The heat source is directed at the incineration tube inlet, so that the highest temperature inside the heating chamber is concentrated along an axis between the heat source and the incineration tube inlet. The distance between the incineration tube inlet and the heat source is adjustable for controlling the temperature inside the incineration tube.

Abstract: A controlled thermal oxidation process for solid combustible waste. The process comprises a first combustion stage wherein the waste is burned in a downward direction from top to bottom. A first, fixed air flow of predetermined volume is passed from bottom to top of the waste. A second, modulated air flow of predetermined lesser volume is passed over the waste and through the combustion flame. The process further comprises a second combustion stage wherein products of combustion from the first stage are exposed to high temperature conditions for a short period of time under 135% to 200% overall stoichiometric air conditions.

Abstract: A process and apparatus for combustion in which a combustible material is introduced into a combustion chamber and oxidant is supplied to the combustion chamber. The combustible material is burned, and forming a primary combustion zone. A mixture of flue gases and flyash having an organic content is injected into the combustion chamber downstream of the primary combustion zone to create an oxygen-deficient reburn zone, thereby lowering the temperature of combustion, reducing the NO.sub.x content of the flue gases, and reducing the potential for NO.sub.x formation in a tertiary oxidizing combustion zone disposed downstream of the oxygen-deficient reburn zone.

Abstract: The present invention describes a method and apparatus for vaporizing and thermally incinerating leachate utilizing gas, including waste gas. The method of disposing of the leachate and waste gas comprises the steps of combusting waste gas in a fire tube heater submerged in leachate contained in a pressure-controlled tank, vaporizing the leachate with thermal energy absorbed from the fire tube heater, releasing the resulting leachate vapor through a pressure valve to a connecting enclosed thermal incinerator, and combusting the leachate vapor in the thermal incinerator thereby destroying volatile organics in the vapor.

Abstract: The present invention provides a relatively compact self-powered, tunable waste conversion system and apparatus which has the advantage of highly robust operation which provides complete or substantially complete conversion of a wide range of waste streams into useful gas and a stable, nonleachable solid product at a single location with greatly reduced air pollution to meet air quality standards. The system provides the capability for highly efficient conversion of waste into high quality combustible gas and for high efficiency conversion of the gas into electricity by utilizing a high efficiency gas turbine or by an internal combustion engine. The solid product can be suitable for various commercial applications. Alternatively, the solid product stream, which is a safe, stable material, may be disposed of without special considerations as hazardous material.

Abstract: A method and apparatus for the volume reduction and processing of solid organic waste, in particular ion exchange media from nuclear facilities containing sulfur or chlorine. A method and apparatus for the volume reduction of nuclear waste is disclosed comprising: subjecting the waste to pyrolysis in a pyrolysis vessel, and gasifying the solid pyrolysis residue in a steam reformer to remove residual carbon. A further method and apparatus for the processing of nuclear waste is disclosed comprising: grinding the nuclear waste, addition of iron powder, pyrolysis, gasification of the pyrolysis residue, and combustion in a submerged bed heater. An evaporator cools gases from the submerged bed heater. Off gases from the evaporator are treated by a fiber bed scrubber to remove acids.

Abstract: The present invention refers to a process for disposing of materials which are explosive active masses and/or contain them comprising the following steps:feeding the materials to be disposed off in a rotary cylindrical furnace (1), conveying the materials into a reaction zone and simultaneously forming compartments of the materials during conveyance, with the materials being thermally reacted in an oxygen-containing environment and the reaction products being fractionately discharged in the form of solid, liquid and gaseous products.

Abstract: A low-cost volume-reducing treatment method for waste which thermally decomposes or burns chlorine-containing waste while the generation of hydrogen chloride and dioxin is completely or considerably suppressed. According to the method, volume of the waste can be greatly reduced. Shredder dust and other waste which contains chlorine derived from, for example, chlorine-containing polymers is thermally decomposed or burned at a temperature of 300.degree. to 1000.degree. C. in a reducing atmosphere where unburned carbon remains. Preferably, a basic material like red mud which contains alkali metal oxides or alkaline earth metal oxides is added before treatment.

Abstract: For determining the average radiation of a surface region of a burning bed, an infrared camera is used in a firing installation, which camera is aligned with this region and is equipped by means of appropriate flame filters in such a way that it operates at the minimum of the interfering radiation emanating from the flame, whereby this interfering radiation is already largely eliminated. In order then also to eliminate the solids radiation from moving particles and thus to obtain a temperature measurement of the burning bed, recordings are made successively at short intervals of time by means of the infrared camera and these are evaluated in the evaluation and control device.

Abstract: A method of treating oil sludge and an apparatus for carrying out same, whereby oil of good quality and inorganic harmless slag can be easily obtained. The method includes agitating oil sludge in an electrolytic tank so as to liquefy same, extracting waste fluid from the liquefied oil sludge, separating solid material from the liquefied oil sludge with a centrifugal separator, extracting waste fluid including the solid material, transporting the liquefied oil sludge to a precipitation tank, extracting waste fluid which is separated and precipitated in the precipitation tank, applying low frequency oscillation to the oil sludge in fluid supply tubes between the electrolytic tank, centrifugal separator and precipitation tank so as to increase oxygen content, extracting oil from an upper portion of the precipitation tank, and incinerating the extracted waste fluid.

Abstract: The present invention is directed to the art of treating waste using laser technology. Industrial and toxic waste materials are irradiated with a laser inside a spherical reactor chamber such that they are heated to high temperatures. Organic compounds are thermally destroyed and chemical bonds are broken. Cool oxygen is pumped into the reactor to provide a refractory protective shield. Silica is added into the vessel at the high temperatures and encapsulates any heavy metals into its crystal matrix. The resulting solidified product may have a hardness of at least 8 on the Knoops scale of hardness and may be used as tooling, road material, oven lining, building materials and the like.

Abstract: A method and apparatus for enclosing, controlling and suppressing the explosive destruction of munitions, including cluster-bomb munitions by detonation in an explosion chamber. The apparatus comprises a double-walled steel explosion chamber in which the of the chamber walls and access doors are filled with granular shock damping silica sand. The floor of the chamber is covered with granular shock-damping pea gravel. An array of vent pipes vents the chamber into manifolds leading to a scrubber for further cooling and environmental treatment of the gaseous combustion products. Within the chamber, plastic bags of water are suspended over the detonation. A munition to be destroyed is placed within an open-topped manganese steel fragmentation containment unit, which is then placed within the chamber under a woven steel blast mat secured to the chamber roof.

Abstract: A system for pyrolysis of hydrocarbon constituents of waste material including a treatment unit featuring a retort with a ellipsoidal cross-section forming a first retort half and a second retort half, the material to be treated being selectively deposited in only one half of the retort at a time during any given period of system operation, to avoid abrasion and wear of the half not in use, thus effectively doubling the life of the retort component. Another feature of a treatment unit according to the invention is a heat reclamation arrangement that introduces gases that have first been combusted to supply heat energy to the retort through a conduit directly into the interior of the retort, to improve the efficiency with which pyrolysis takes place. Further, the treatment unit has an exhaust and cleaning arrangement to render gases produced during pyrolysis substantially free of pollutants such that the gases can be vented to the atmosphere.

Abstract: A material treatment process and apparatus are described, wherein the formation within a pyrolyser of a plasma having a temperature of at least 10,000.degree. C. into which material to be treated is injected as a fine spray or gas and wherein said material is moved as a stream through the pyrolyser toward the exit while maintained at a high temperature.

Abstract: Combustible is comminuted and dried, and metal and noncombustible are removed from the coarsely comminuted combustible. Then, the combustible is secondarily comminuted and separated into coarse combustible and fluff which is fine combustible. The coarse combustible of the separated combustible is fed onto a fire grate (2) of a refuse incinerator (1), and burned in flat bed combustion in a primary combustion chamber (4). On the other hand, the fluff is burned in suspended combustion in a secondary combustion chamber (7) with a combustion fluff burner (5) for incinerating combustible. Thus, refuse containing much plastics which is formed into fluff can be efficiently disposed of, whereby the amount of incineration is increased as a whole.

Abstract: Combustible gases from a solid fuel are produced by pyrolyzing the fuel in a pyrolyzer which also produces carbonaceous material. The carbonaceous material from the pyrolyzer is combusted in a furnace to produce combustion products that include hot flue gases and ash particulate. The combustion products are separated into a plurality of streams, one of which contains flue gases, and another of which contains hot ash which is directed into the pyrolyzer. Finally, the stream of flue gases from the furnace is used to dry the fuel that is supplied to said pyrolyzer.

Abstract: The method of an apparatus for incinerating and melting wastes along with incombustible materials in the wastes which comprise introducing wastes in a horizontal rotary furnace, incinerating the wastes at a temperature from 800.degree. C. to 1,200.degree. C., and melting the ashes of the wastes together with the remaining products which are vitrified at a temperature of more than 1,600.degree. C., by an oxygen type burner in which an oxygen-fuel mixture has an oxygen content of 50% in the mixture. The exhaust gas generated in the incineration and melting processes is introduced to a dust collector for cleaning the exhaust gas.

Abstract: A combustion method and apparatus in which combustible matter, e.g., waste matter, coal, etc., is gasified to produce a combustible gas containing a sufficiently large amount of combustible component to melt ash by its own heat. A fluidized-bed furnace has an approximately circular horizontal cross-sectional configuration. A moving bed, in which a fluidized medium settles and diffuses, is formed in the central portion of the furnace, and a fluidized bed, in which the fluidized medium is actively fluidized, is formed in the peripheral portion in the furnace. The fluidized medium is turned over to the upper part of the moving bed from the upper part of the fluidized bed, thus circulating through the two beds. Combustible matter is cast into the upper part of the moving bed and gasified to form a combustible gas while circulating, together with the fluidized medium.

Abstract: A treatment system is provided which can treat solid materials and/or liquid materials. Preferably, a separator initially separates liquid and solid materials, and the solid materials are deposited upon a substrate within a microwave cavity. Liquids remaining with the solid materials drain through the substrate, and the solid materials are subjected to microwaves. The liquids exiting the separator are preferably also passed through a filter assembly which retains any suspended particles remaining in the liquid, and subjects the particles to microwaves. Exhaust filters can also be provided for the microwave cavities, and the exhaust filters can also be subject to microwaves to incinerate any particles remaining in the exhaust gas. Fire tube arrangements for incinerating solid materials retained or extracted by substrates or filters are also provided.

Abstract: A method and apparatus for incinerating loose waste material in which the loose waste material is introduced into a furnace chamber to form a layer in the bottom of the furnace chamber. The layer of loose waste material is subjected to the direct action of technical-grade oxygen, preferably in less than stoichiometric amounts, with the oxygen fed at least at the speed of sound. The oxygen is supplied utilizing a plurality of lances distributed in the furnace chamber. Heat produced by combustion of the waste material melts incombustible constituents of the waste material. Residual unburnt combustible gases can be fed through an outlet stack to a secondary combustion chamber.

Abstract: A heater for a grain bin is attached to the inlet flange of a centrifugal inline blower and comprises a housing having a vertical front wall attached to the inlet flange of the blower and a parallel vertical rear wall. The front wall has an opening aligned with the opening into the blower. The rear wall has an opening aligned with the opening in the front wall so that the majority of the air entering the blower passes straight through the housing from the rear wall to the front wall. A sleeve surrounds the opening in the rear wall and induces some flow from the housing to mix with the flow into the blower. The combustion chamber is attached to the rear wall through an opening in the rear wall above the sleeve. The housing has two side walls converging to an open top through which air can escape. When heated air is required an air flow is induced from the combustion chamber to mix with the air flow through the housing to heat the total air flow.

Abstract: A method and installation for reducing emissions during the incinerating of waste results from a combustion chamber, a return situated downstream of the combustion chamber for returning a portion of a flue gas to the combustion chamber in a continuous cycle and a flue gas purification installation; and from situating the flue gas purification installation between the combustion chamber and the return, removing chlorine, heavy metal and sulfur dioxide from the flue gas produced in the flue gas purification installation, and admixing the oxygen required for combustion as pure oxygen with the flue gas to generate synthetic air in the ratio of 4:1 to 1:1, and preferably 2:1 to 1.5:1 while excluding ambient air.

Abstract: An apparatus and process are provided for non-combustion, high-temperature cleaning of organic contaminants from fragile parts which are resistant to heat below the temperature of combustion but which may not be resistant to burning or heat above the temperature of combustion, by pyrolysis in a self-inerting atmosphere not supporting combustion, and by oxidization at a controlled temperature below the temperature of combustion for the contaminants preventing fires, explosions, and difficult-to-control temperature variations, with means for removing smoke and fumes from effluent gases, and equivalently for cleaning non-fragile, heat resistant parts as well.

Abstract: A plasma arc torch heat based apparatus and method converts a quantity of particulate soil having a first set of engineering properties into a selected number of smaller quantities each having improved engineering properties differing from the first set of engineering properties and makes practical utilization of the smaller quantities for applications in which the first set of engineering properties were not suited. The apparatus includes a rotatable kiln which is positionable at an angle to horizontal such that soil is received in an upper end and discharged at a lower end thereof. The kiln is heated to a controlled temperature based on the properties of the soil before treatment and the desired improved properties after treatment to meet application requirements.

Abstract: A system for the production of fuel gas from solid biomass fuels and for the combustion of said fuel gas is disclosed which comprises a gasification zone for producing a fuel gas from a solid biomass fuel, said gasification zone being adapted for connection to a solid biomass fuel supply and to a gasification air supply, a predetermined ignition point, a pathway for conveying fuel gas from the gasification zone to the ignition point, and a combustion air injection device for mixing fuel gas and combustion air at the ignition point to initiate combustion of the fuel gas and the combustion air, and for shaping and directing the flame produced, said device being adapted for connection to a combustion air supply.

Abstract: A method and apparatus for treating refuse by non-combustibly shrinking plastics in the refuse. The trash is heated to a temperature of at least 250.degree. to 500.degree. for a minimum period of time. A rotatable chamber heats the refuse and transports the refuse for the minimum period of time. An operator controls the rate of rotation of the chamber and thus the time of heating in accordance with the moisture content of the refuse. A steam/air mixture used as a heat medium serves to kill bacteria in the refuse in addition to shrinking and drying the refuse.

Abstract: Improved methods for the treatment of liquid chemical compounds and process systems for practicing those methods are provided. The methods are practiced by spraying the liquid chemical compounds into a matrix bed of heat resistant materials at temperatures sufficiently high to oxidize the chemical compounds. The sprayed liquid chemical compound is preferably heated to its gaseous state prior to contacting the matrix bed. Processing steps for removing coke deposits in the matrix bed are also provided. The methods are particularly advantageous for the destruction of chemical agents and munitions.

Abstract: A preheater or precalciner kiln is modified to feed solid fuel into a riser duct of the kiln to enable efficient environmentally sound use of solid waste-derived fuel. The modified kiln includes a solid fuel delivery port in the riser duct, a fuel feeder device for feeding solid fuel through the delivery port, and a fuel suspension device for holding the solid fuel for combustion in a fixed position in the kiln gas stream.

Abstract: A method for decontaminating both soil and mixed waste water polluted by hydrocarbons in a single integrated process is disclosed. Contaminated mixed waste fluid is separated into water and hydrocarbons which are then used in the thermal decontamination of polluted soil through the volatilization of hydrocarbon contaminants. Flue gases containing the volatilized hydrocarbons from the thermal soil decontamination undergo oxidation. Thermal energy from the soil decontamination process and the thermal oxidization of the flue gases can be recovered and used to facilitate the separation of hydrocarbons and water. In this integrated system, every by-product of each step is either decontaminated or consumed in another operation of the system. Energy conservation within this system is also realized by the use of heat exchangers to transfer energy from where it is created by the process to where it is used elsewhere to enhance efficiency within the process.

Abstract: The novel waste treatment system of the invention employs multiple reactor zones for processing heterogeneous waste. In one embodiment, the reactor system (10) includes the following components: first (12) and second (14) solid waste feed subsystems; and liquid waste feed subsystem (16); a plasma torch assembly (18) for heating a first chamber (20) of the reactor system (10); a joule effect heater assembly (22) for heating a second chamber (24); a gaseous effluent processing subsystem (26); a metal discharge recycling subsystem (28); and first (30) and second (32) slag discharge processing subsystems. In an alternative embodiment, each of the reactor zones is heated by joule effect heaters. The reactor system (10) can be operated in an oxidation or reduction mode. In either mode, the reactor system (10) allows for more complete reaction of a variety of heterogeneous waste.

Abstract: The present invention provides tunable waste conversion systems and apparatus which have the advantage of highly robust operation and which provide complete or substantially complete conversion of a wide range of waste streams into useful gas and a stable, nonleachable solid product at a single location with greatly reduced air pollution to meet air quality standards. The systems provide the capability for highly efficient conversion of waste into high quality combustible gas and for high efficiency conversion of the gas into electricity by utilizing a high efficiency gas turbine or an internal combustion engine. The solid product can be suitable for various commercial applications. Alternatively, the solid product stream, which is a safe, stable material, may be disposed of without special considerations as hazardous material.

Abstract: The present invention relates to a process for the mixture of and/or for the achievement of and/or the facilitation of the reduction of undesired compounds, such as soot, hydrocarbons and the oxides of nitrogen and, if the fuel contains other substances, such as sulphur and chlorine, and metal compounds such as mercury and arsenic, for bringing about a reduction in emissions of acidifying oxides of sulphur and hydrogen chloride, as well as mercury and arsenic compounds in an incineration unit. In accordance with the invention, this is achieved by a special mixture and mixing process, in which suitable reducing agents for nitrogen compounds and/or for other undesired substances, for example oxides of sulphur, are introduced into the incineration unit in direct association with the combustion zone in conjunction with the supply of gas. This can take place in conjunction with the actual incineration process, or separately from it.

Abstract: Waste treatment. The installation for implementing the method comprises: a furnace (1) defining a confinement enclosure (2) for a fluidized bed (3) of particulate matter; means for recirculating the particles of the bed; means (28) for mixing, coating, and drying the recycled particles and the waste; and means for feeding the furnace from the means (28). The invention is applicable to treating moist waste.

Abstract: Pyrolysis system and method wherein used batteries other than lead-acid batteries for reclamation and recovery of the constituents therein or environmentally safe disposal are placed in rail carts and moved on rails through an entry zone into a central heating zone of a pyrolysis chamber maintained under a negative pressure and then into an exit zone.

Abstract: An incinerator and a process for the incineration of animal carcasses. The inner combustion chamber of the incinerator is lined with a high temperature fibrous insulation material and a stainless steel liner thereby permitting the temperature of the liner to become very hot during incineration. The animal carcass is deposited directly onto the stainless steel liner. Heat is then applied to the chamber, and the liner becomes red hot and radiates heat onto the carcass from all sides of the chamber. The burners are controlled by temperature responsive control devices to maintain the combustion chamber within a desired temperature range. In another embodiment, a stainless steel wall is disposed within the interior of the incinerator housing to form a combustion chamber and an afterburner chamber alongside the combustion chamber. The afterburner chamber includes a separate burner located near the bottom of the incinerator for heating the air as it enters the afterburner chamber.

Abstract: Apparatus and method for gasification of feedstock materials are disclosed. The apparatus includes an oblate spheroid (egg-shaped) gasification chamber having inlets for feedstock material and gaseous oxidizer. A combustion gas outlet permits removal of combustion gases, and an ash collection region allows collection and removal of ash produced in the gasification chamber. A plurality of recirculating venturi tubes located within the gasification chamber recirculate combustion gases and particulates into and out of a gasification zone. Each venturi tube includes a plenum having a gaseous oxidizer inlet and a plurality of orifices capable of producing high velocity air flow towards the feedstock material bed in the gasification zone. Filtration action of the bed entrains combustion particulates. A plurality of air cannons coupled to one or more pulse valves provide pulsed air flow into the gasification zone to agitate the feedstock material bed.

Abstract: In the case of a process for treating residues and waste materials, in particular household, commercial, and industrial trash, in a first step in the process these materials are treated thermomechanically, for example in a worm extruder, that is, in particular, heated, separated into fibers, and brought to a solid state. Then the materials in the solid state are separated selectively and subjected to a further recycling treatment.

Abstract: A method and apparatus for incinerating waste material and in particular, for incinerating particulate material resulting from the shredding of vehicles. The particulate material is fed to one end of a rotary drum, and is subjected in the drum to pyrolitic incineration in the absence of air, to generate combustible gases and a solid residue. The combustion gases and the residue are discharged from the drum to a discharge hood, where the solid residue is separated from the gases. The gases are then passed through a condenser to cool the gases to a temperature below 212.degree. F. to thereby condense water vapor and higher boiling point hydrocarbon gases to produce hydrocarbon liquid.

Abstract: Technology for treating industrial and domestic waste which can be applied in the chemical industry as well as in the power generation sector as a way of using plastic and polymer waste. The method involves: melting down the plastic waste in an atomsphere of superheated steam and thermal destruction of the waste at a temperature of 400.degree.-500.degree. C. on a multi-layered inert material whose particles diminish in size, layer by layer in the direction of flow of the melt, from 3.83 to 0.12 mm; and the removal and condensation of the gaseous products.

Abstract: The present invention describes a process for the disposal of residual substances from waste incineration plants as well as activated coke and/or activated carbon. For this purpose the residual substance as well as activated coke and/or activated carbon is introduced into the annular shaft (3) of the primary chamber (2) of the furnace (1). In the primary chamber (2) a temperature of 1250.degree. C. to 1500.degree. C. is set. The molten material flowing off leaves the primary chamber (2) together with the flue gases through the central outlet (4). The molten material is passed through the secondary chamber (5) and is discharged as slag.

Abstract: A waste material, particularly refuse, is conveyed through a combustion chamber while simultaneously being mixed and is treated with a gaseous oxidizing agent. The combustion chamber comprises a rotary tubular furnace. The waste material is acted on by the gaseous oxidizing agent, with the volatile combustible constituents of the waste material forming flames with the oxidizing agent. The radiation heat of the flames frees additional volatile constituents of the waste material. The waste material freed of volatile constituents is obtained as refuse coke and the unburnt volatile constituents are obtained as combustible gas. The thermal treatment in the rotary tubular furnace can be continued beyond the freeing of volatile substances. Given an adequate temperature rise, the oxidic constituents of the slag formed are melted, and the latter can be obtained in the form of glass.

Abstract: The low-emission swirling-type furnace is designed to burn organic fuel and it can be most advantegeously used for dust combustion.A low-emission swirling-type furnace, according to the invention, comprises a combustion chamber (1) with a prismatic dry-bottom hopper (5) having a slot mouth, and an undergrate blast inlet means (7) disposed thereunder. The furnace includes at least one burner (2) formed by at least a pair of ducts (2a,2b ) lying one above the other and intended for supplying the air-fuel mixture. The ducts (2a, 2b) are each provided with a device (3, 4) for controlling the "air/fuel" ratio, ensuring such a ratio between the amount of air and the amount of fuel in each of the ducts (2a,2b ) that for the overlying duct (2a), this ratio turns out to be invariably higher than for the underlying duct (2b).

Abstract: Process for heating a hollow needle (2) consisting essentially of a metal tube (3), the inside and/or outside of which have previously been brought into contact with a contaminating medium, according to which an electric current is supplied to the said needle, flowing in the metal wall and over the length of the said tube (3) and dissipating thermal energy therein through the ohmic effect, characterized in that a predetermined quantity of electrical energy is supplied to the said needle (2), metered as a function of the electrical characteristics of the said tube (3), on the one hand to suffice for decontamination of the needle, both inside and outside, and on the other hand to limit the heating and preserve the integrity, including the original shape, of the said needle.

Abstract: A method for combusting low heating value liquid by forming a toroidal vortex between atomized liquid and medium velocity oxidant, and carrying out combustion within the toroidal vortex to serve as a dependable ignition source for the main combustion reaction.

Abstract: Plasma energy recycle and conversion (PERC) reactor and process for disposal of energetics such as solid rocket propellants, liquid rocket fuel, chemical agents such as nerve gas, industrial waste such as paint sludge, medical waste or any aqueous/organic liquid or slurry that is pumpable and for separation/consolidation/conversion of low-level radioactive waste or mixed waste incorporating an induction coupled plasma heat source, insulated primary and secondary reaction chambers and associated peripheral control, process and filter devices.

Abstract: A thermal method for continuously processing waste having a calorific value and any degree of moisture, wherein waste is put in a flow of hot, heat-resistant, heat-exchanging material which is warmer than 100.degree. C. The heat exchanging material cools due to heat exchange, the waste dries and the non-evaporated waste components are heated. The cooled, heat-exchanging material is subsequently separated from the dried waste materials and the separated dried waste material is mixed with a percentage of the separated heat-exchanging material. The dried waste material and heat-exchanging material mixture is subsequently heated to pyrolyze waste material and heat the heat exchanging material in preparation for its subsequently use in the continuous process.

Abstract: An improved method and apparatus for removal of .Iadd.contaminants such as .Iaddend.petroleum hydrocarbons from contaminated soil. The apparatus of the invention includes a shallow container, preferably with vertical sides, which has in its bottom wall a multiplicity of elongated recessed chambers with an open mesh entry area at the upper side, and a gas discharge orifice at one end of each chamber. A rack containing burners is adapted for positioning over the material to be treated within the container. The invented method includes charging materials to be treated into a container, heating the material while creating a partial pressure within the chamber, establishing a vacuum to pull the gasses downwardly through the soil and atmospheric air downwardly with the gasses, then either collecting or discharging the removed gasses, after which the soil is removed from the treatment chamber.