Abstract: A garbage disposal system for household garbage which includes a crushing and shearing unit for the process to separate the liquid from the solid and to shear the solid into refuse strips, a screw friction machine to supply the heat source for a scrap metal recovery unit to collect scrap metal from refuse strips, a drying and a high-temperature heating process to heat refuse strips into dry state, a compressing process to compress refuse strips into refuse blocks, and a cement blocking process to make refuse blocks into caissons for sea water concrete or tidal land construction. Waste liquid filter and waste gas filter are used to filtrate impurities from waste liquid or gas.

Abstract: An incinerator of sectional structure has an airpipe for sending combustion air into a furnace. The airpipe is a straight pipe tapered off at end portion and closed by a plug of castable refractory material filled up in the tapered portion to improve the durability under high temperature circumstances. The airpipe is also inserted into a furnace through a hole opened on an upper furnace wall, and a seal member of easy spallable and castable refractory material fills up the gap between the airpipe and the hole to make easy exchange of the airpipe possible.

Abstract: An apparatus for reducing NOx pollution in the flue gas produced by a burner includes a heat exchanger wherein at least some of the heat transfer elements are coated with a catalyst. A plurality of reactive gas injectors are arranged to introduce a nitrogeneous compound, preferably a source of ammonia, across a hot-end face of the heat exchanger. A reactive gas flow distribution system permits the distribution of the nitrogeneous compound flowing through at least some of the gas injectors to be varied responsive to the temperature profile of the heat exchanger. Preferably, the apparatus also determines the total NOx flow in the flue gas, and the reactive gas flow distribution system permits the total amount of reactive gas flowing through at least some of the gas injectors to be varied responsive to the total NOx flow in the flue gas.

Abstract: A method for converting solid organic fuels, most particularly coals, into high temperature gases that can easily be transformed into useful energy. This method employs a substantially closed reactor, referred to as a gasifier, having an internal reaction chamber or cavity made of materials that can tolerate the presence of oxygen at high temperatures, that possess low thermal mass, that limit or restrict the passage of heat, that function as almost perfect black bodies at high temperatures, and that are resistant to the abrasive effects of the solid fuels.

Abstract: A heat-generating plant comprising a combustion chamber (1), at least one convective exchange zone (4, 9), a desulfurization chamber (6) comprising at least one means (8) for injecting an absorbent and communicating with a chamber (13) linked to said first convective exchange zone (9), said separation chamber having at least one outlet (132, 133) for the spent absorbent and an outlet (14) for the depolluted gases. The plant also comprises :means (32) for regenerating the spent absorbent, andmeans (38, 41) intended to treat the absorbent and/or the regeneration gases coming from said regeneration means (32).A means (16) for the intermediate storage of the spent absorbent can also be provided in the plant.

Abstract: Oxidizable components in an exhaust air or gas flow are burnt by a burner in a combustion chamber enclosed in a housing. For this purpose the exhaust air is distributed into inlet ends of heat exchanger pipes which have outlet ends near the burner. The arrangement is such that the exhaust air carrying oxidizable components flows through the heat exchanger pipes while the exhaust air freed of oxidizable components flows around the heat exchanger pipes. In order to permit effective heat expansions and contractions of the heat exchanger pipes, these pipes have an L-configuration with radially inwardly extending legs having inlet ends connected into perforations in a jacket forming an exhaust air distribution chamber, and with substantially axially extending legs having outlet ends leading close to the burner. An air inlet leads centrally into the distribution chamber and a cleaned air outlet leads out of the housing.

Abstract: A pollution control system for removing harmful elements from industrial smoke streams comprises a reciprocating pump assembly that draws smoke from a furnace or the like and delivers it through a passageway where the smoke is treated sequentially to remove harmful elements therefrom. Disposed along the passageway is an atomizer station, a first fibrous filter, an ignition chamber, and a second fibrous filter. Having traversed the passageway, the smoke is ejected into a large tank of water and bubbles to the surface thereof, thus being further cleansed. From the water tank, the cleansed smoke stream moves up a stack, through a final fibrous filter, and into the atmosphere where it poses a substantially reduced environmental hazard.

Abstract: A condensate drainage device employed as a safety device for preventing the discharge gases produced by combustion from flowing out through the condensate drainage conduit, in condensation boiler apparatuses.

Abstract: A toxic gas exhaust suppression-type combustion system burns a hydrocarbon-based fuel and comprises, an incomplete combustion section for causing incomplete combustion by supplying the fuel and a small amount of air, a solid component removing section, connected to said incomplete combustion section, for collecting and removing a solid component, such as soot, within an unburned gas generated by said incomplete combustion section, and a complete combustion section for perfectly burning a remaining unburned gas by supplying a sufficient amount of air, the remaining unburned gas being obtained by removing the solid component from the unburned gas generated by said incomplete combustion section by flowing the unburned gas through said solid component removing section.

Abstract: A flueless combustion system which accepts materials nominally designed as trash and waste, including the solid and gaseous combustion products of the system itself, and converts these materials and combustion products to marketable products. Pyrolytic conversion is employed to reform these materials and combustion products. The gaseous combustion products of this system are exhausted to an underwater distribution system which permits the gaseous combustion products to percolate through water which contains cellulosic materials to further absorb and entrap gases. The water, cellulosic materials, as well as sediments resulting from the cooling of the exhaust gases, are utilized within the pyrolytic process. The gases, steam, and heat resulting from the pyrolytic process are used in conversion processes such as the Fisher-Tropsche Process to provide marketable products. For example, the Fisher-Tropsche Process produces liquid fuels.

Abstract: An apparatus for separating and recovering effluent gases from a furnace includes a pressure vessel for containing the gases. This vessel has a fluid input for receiving the gases and a fluid output for selectively removing the gases when they are separated. A condenser is provided to transform and maintain the lowest vapor pressure gas as a liquid so that it accumulates as a liquid at the bottom of the vessel. The remaining non-condensed effluent gases accumulate in strata above the liquid. Apparatus is provided to selectively remove the liquid and at least one of the remaining non-condensed gases from the vessel through the fluid output. Also set forth is a method for recovering effluent gases from a furnace including the steps of adding the gases to a pressure vessel, altering the density of the gases so that the lowest vapor pressure gas condenses into a liquid and the non-condensed gases stratify above the liquid. Then the liquid is removed from vessel and optionally expanded to cool the vessel.

Abstract: In an infrared stove apparatus, there is provided a stove body having a radiation window at the front and upper portions of the stove body. A frame is placed within the stove, and one open end of the frame faces to the front portion of the stove body so as to serve as a radiation opening, the other open end of the frame having a porous burner plate through which a mixture of fuel gas and air is to be released. An exhaust opening is provided at the upper lateral side of the frame to pass exhaust gas released through the porous burner plate when the mixture of fuel gas and air is ignited at the time of operation. A metallic net of a suitable mesh screen is provided within the exhaust opening to increase fluid-resistance of the exhaust gas flowing out through the exhaust opening so as to keep a uniform velocity distribution of the exhaust gas while restraining outside air from entering into the frame through the radiation opening leading to the exhaust opening.

Abstract: It is the object of the invention to present a construction for convective smoke filtering cleaners, especially for of the kind that mainly consists of a ceramic smoke filter, a drive fan, a smoke converting device, a water filter, a poison filtering device and a draw fan. Its major feature is that the ceramic smoke filter percolates the black smoke in the exhaust duct and turns it into white smoke, and then the drive fan makes white smoke quickly flow into the smoke converting device. The water supply system of the smoke converting device keeps water flowing around the wall of the exhaust duct and atomized water spraying incessantly in the duct. A rotating reservoir atomizes water and sprays over the inside wall of the duct. Consequently, when the white smoke arrives at the smoke converting device, atomized water drops can completely absorb and purify the smoke. The drifting dust and impurities in smoke along with water fluid are collected in the water filter installed under the smoke converting device.

Abstract: An improved system is provided for the incineration of refuse, especially scrapped automobile and truck tires and the treatment of incineration exhaust gasses as produced thereby. The refuse is incinerated in a closed fire box at controlled temperatures with the incineration exhaust gasses being serially treated by filtration, after-burning, washing with water by use of both a water bath and a water spray, washing with a petroleum based solvent, and cooling to a temperature below the freezing point of water. Filtration is carried out by a self-cleaning apparatus. A combined apparatus is used to carry out both the water bath and water spray with the resultant gasses being acceptable for release into the atmosphere.

Abstract: An emissionless furnace boiler and effluent gas recovery system includes a pressure vessel having a fluid input and fluid output. The system is capable of maintaining an entropy characteristic equal to at least the condensing pressure of the lowest entropy gas of the gases constituting a processed effluent gas discharge. There is also provided a hollow, annular jacket having a surface in thermal communication with the pressure vessel, the jacket having an axis in substantial alignment with the gravity vector and the jacket including a fluid input and fluid output. The system also includes a fluid path beginning internally of said pressure vessel, passing through the vessel, through the fluid output means, continuing externally of the vessel, and extending between the vessel and the input of the jacket. Within the fluid path, but prior to the input of the jacket, there is provided an expansion valve for selectively changing the volume of fluid flowing from the vessel prior to its entry into the jacket.

Abstract: The present invention relates to combustion devices such as incineration furnaces and the like, and in particular, relates to combustion devices which include a combustion gas cooling device by means of which slag, combustion by-products and the like are rapidly cooled and thereby converted to nonadhering fly ash. By converting slag to nonadhering fly ash, the accumulation of slag in downstream exhaust processing equipment is diminished, and hence, the necessity of halting the operation of the combustion apparatus in order to remove the accumulated slag is eliminated, thereby improving the efficiency of operations.

Abstract: An assembly using horizontally oriented heat exchange pipes (10, 10a) and a blower unit (11) for providing heated air adjacent to a furnace (100) and hot water heater (102) is described. The blower unit includes heat exchanger pipes with a downwardly inclined section (10d) and an upwardly inclined section (10e) from horizontal to and from a low point (10c) with a drain (12) for condensed liquids from the flue products exhaust pipe (10a) at the low point. The drain removes condensed liquids which are highly corrosive from the exhaust products pipe without allowing flue gases to pass through the drain.

Abstract: A combustion apparatus is provided, preferably of the thermal heat regeneration type, in which noxious or other gases are passed to an incineration chamber, to be burned at a sufficiently high temperature that they are disposed of. The apparatus is constructed as a compact unit, as essentially a single oven separated into a plurality of heat exchange sections, and with plenums therebeneath, fed by an inlet duct, and able to deliver the products of combustion to an outlet duct, both preferably disposed beneath the plenums, and preferably mounted on a common supporting frame for facilitating sufficient mounting of the apparatus, as well as ready transport of the same.

Abstract: A gas burner assembly including a main burner, a catalyzer and an after burner has a fire guide formed on a boundary between porous flame plates.

Abstract: A method and apparatus for burning a combustible material in a closed container having an open top wherein a sheet of oxygen containing gas is forced into the burning chamber of such container, wherein, in forming the sheet of oxygen containing gas, a majority of the gas which is to be formed into a sheet is forced away from the central section of the sheet towards the end sections of the sheet that are situated on either end of the central section and wherein the interior volume of the burning chamber can be varied by use of a movable wall means so that the combined effect of the gas sheet formed in the foregoing manner and the adjusted internal volume of the burning chamber in relation to the specific material to be burned yields an efficient combustion process as evidenced by minimal production of opaque smoke.

Abstract: A solid fuel combustion chamber combusts the fuel utilizing underfire and overfire air. Both the underfire and overfire air derive from a common intake port, with a controllable vane determining the ratio between the two air sources. Gas flow from the solid fuel combustion chamber enters a gas combustion chamber designed to produce turbulence and thereby promote further combustion. The gas flow is then accelerated in a gas flow chamber and directed to the circulating fluid carrying tubes of a heat exchanger. The heat exchanger includes a condensation chamber which extracts sufficient heat from the gas flow to produce a condensate. An injection system superheats the condensate and injects it into the solid fuel combustion chamber to thereby reduce residue accumulation.

Abstract: A condensate drain system for a furnace incorporates a collector and blower housing assembly mounted above a secondary condensing heat exchanger with condensate ports between the blower housing and the collector housing positioned to assure flow of all condensate from the exhaust flue and the blower housing to the collector housing. A pipe extends downwardly from the collector housing to the condenser outlet manifold so that all condensate ultimately flows to the condenser outlet manifold and can be discharged to a drain by a single tube.

Abstract: A process for treating hazardous particulate generated during a manufacturing process is provided. The process includes the steps of: passing particulate material through at least one duct toward a waste collection device; feeding an additive into the duct to be mixed with the particulate material, upstream from the waste collection device; and passing the particulate material mixed with the additive into the waste collection device. A scrap remelting apparatus is also provided.

Abstract: A waste material incinerator which produces an exhaust, containing trace amounts of a toxic organic substance, includes a flue containing a refractory filter. The refractory filter is heated by the exhaust produced by the incinerator to a temperature above 700.degree. C. to destroy the toxic organic substance in the exhaust. The refractory filter preferably includes a plurality of ceramic cylinders and is periodically cleaned to remove accumulated solid particles on the upstream surface of the cylinders by injecting high pressure air into the cylinders.

Abstract: A process and apparatus for the controlled incineration of hazardous wastes comprising a two stage combustion of the waste into gases. The gases are thereafter cooled and cleaned by passing through primary and secondary scrubbers for cleaning. The invention also concerns an apparatus for the incineration of hazardous waste. The system cleans the gases produced by the incineration process so that hazardous materials are completely incinerated and converted into environmentally safe products at the site of their production.

Abstract: The invention is a method and apparatus for burning combustibles, particularly garbage and coal, in such a manner as to prevent the venting of unwanted pollutants into the atmosphere and for recovering valuable resources. The combustibles are burned in a rotating inclined furnace; solids and molten metals are extracted at the discharge end of the furnace; the discharged gases are passed through a boiler for extracting heat therefrom and generating steam; the discharged gases are liquified by sequential cooling and the so-liquified products removed while preventing discharge of gases into the atmosphere; the remaining gases are passed through a second boiler for further extraction of heat and steam generation and further extraction of liquified products; and the effluent gases are passed into subsequent apparatus for removing any remaining pollutants and for the recovering of resources in accordance with Nielson U.S. Pat. No. 4,728,341.

Abstract: A catalytic combustor wood stove is presented having a combustor ignitor plate which promotes turbulence and mixing of combustion gases with air from a distributed primary air supply to deliver thoroughly mixed gas to the catalytic combustor to light off the combustor at low firebox temperature (in the range of 400.degree. to 500.degree. F.) but operate the combustor at high temperature on the order of 1000.degree. F. to 1200.degree. F. or higher.

Abstract: An apparatus for treating a combustion exhaust gas is here provided which comprises a fire furnace, a denitrating reactor for denitrating the combustion exhaust gas discharged from the fire furnace, a dust collector for collecting solids in the exhaust gas passed through the reactor, and a transport pipe for circulating the solids collected by the dust collector through the fire furnace, the apparatus being characterized in that the transport pipe is provided with an arsenic removal means for removing arsenic from the solids. The arsenic removal means may be a heating device or a washing device. The dust collector may be provided with a means for discarding the solids having a particle diameter of 10 .mu.m or less.

Abstract: A method of operating a combustion plant including a reactor, e.g. a fluidized-bed reactor which transfers heat form a fuel to a granular medium, such as sand, and wherein a part of the heated medium during operation is discharged from the combustion chamber (2) of the reactor (1) and supplied to a heat-producing heat exchanger (11). The plant further includes a storing means (9) which is connected to the combustion chamber (2) of the reactor (1), and a part of the discharged hot medium is transferred to the storing means (9) which stores the medium in order to accumulate the heat therein. In case of increased energy demand, hot medium is supplied from the storing means (9) to one or more additional heat exchangers (28, 29, 30) for supplementing the heat production of the first-mentioned heat exchanger (11).

Abstract: A method and apparatus for removing undesired compounds such as alkali compounds from a shaft furnace such as a blast furnace. The process and apparatus includes providing a plurality of intermediate exhaust conduits or manifolds within the shaft furnace for withdrawing some of the furnace gases which may be rich in alkali or other undesirable compounds from the furnace while allowing the balance of the gases of combustion to rise through the furnace. These conduits are positioned so that the temperature below the conduits is higher than the temperature at which the alkali compounds will volatilize and the temperature above the conduits is lower than the temperature at which the alkali compounds will condense so that the undesirable alkali compounds are in a vapor state when they are withdrawn from the furnace through the intermediate exhaust conduits.

Abstract: An air blower is used with an open fire incineration pit dug below ground level. The blower includes a motor and a fan driven by the motor. A plenum chamber receives air from the fan and has a cross-sectional shape of at least three sides including a flat base flush with the ground level and a front side sloping away from the pit. Preferably, the plenum chamber has a trapezoidal cross-section. A nozzle connected to the plenum chamber jets an air curtain over the open fire in the pit. A protective fence attachable to the plenum chamber surrounds the pit. Also, there may be one or more telescoping sections slidable out of either one or both opposite ends of the plenum chamber for jetting additional air curtains over the open fire in the pit.

Abstract: A process and apparatus for removing moisture from smoke produced in a chemical reaction, such as a combustion reaction, by circulating outside air in heat-exchange relationship with smoke at a point near the chamber where the smoke is produced, thereby heating the air and cooling and partially dehydrating the smoke. A portion of the air which is thus heated is passed in further heat-exchange relationship with smoke and is then directed toward a smoke discharge stack where it is mixed with the partially dehydrated smoke.

Abstract: Disclosed is an apparatus for cleaning sulphur and nitrogen containing flue gases by adding gaseous reagents and by a reaction in a reaction chamber which the reactants pass through in the axial direction and are exposed to at least one electorn beam. The apparatus includes at least one reaction chamber and at least one electron beam source from which the electron beam is admitted into the reaction chamber through at least one pressure step zone. The electron beam source is structurally combined with the reaction chamber in such a manner that the axis of the pressure step stage runs parallel to the axis of the reaction chamber and that the electron beam can be rotationally deflected about this axis to traverse each surface element of a flow cross section of the reaction chamber running perpendicular to the axis at at least one position in the flow path.

Abstract: Apparatus for supplying an air curtain into a pit to facilitate combustion of material disposed within the pit includes an air supply tube mounted on wheels and having an inlet end and an outlet end, a nozzle structure disjointably mounted on the air supply tube at the outlet end thereof and in transverse relation thereto, a motor driven fan for supplying air through the air supply tube and the nozzle and into the pit, the junction between the air supply tube and the nozzle being readily disjointable to accommodate mounting of the nozzle atop the air supply tube for transport along a roadway.

Abstract: An improved trap assembly for a high efficiency fossil fuel furnace includes a vertical tube closed at its lower end with a condensate inlet immediately above the lower end and a condensate outlet above the inlet. A flue gas inlet is provided at the top end of the tube with a flue gas outlet immediately adjacent thereto. A float with a sealing cap is positioned within the tube and rises in response to the level of condensate to block the flue gas outlet.

Abstract: In a process for reheating flue gases originating in furnaces operated with fossils fuels, the flue gases, before being introduced into the chimney, receive heat energy that has been generated in a fluidized bed furnace. Sulfur binding agents are added to the fluidized bed furnace and the flue gases of the this furnace are added to the cleaned flue gases after removal of the suspended dust.

Abstract: An intake air pathway for a wood-burning stove is provided with a control mechanism which automatically responds both to changes in temperatures for controlling the amount of intake air flowing in the pathway and to pressure due to back puff conditions in the stove for closing the intake pathway with and thereby preventing emissions due to back puff. The point of control of the intake pathway may be placed along different points of the pathway. Control valve and check valve functions may be accomplished with a single control surface (i.e., plate or flap), or alternatively, be segregated into two control surfaces. The control arrangement is disposed such that gravity always acts as a safety feature to close the intake air pathway during an uncontrolled fire (e.g. chimney fire) or physical failure of the control apparatus. A fixed-shield baffle system surrounding a combustor of the stove causes reversals of combustion gasses and a secondary air flow supplied to the combustor.

Abstract: A catalytic combustor assembly includes a housing containing a catalytic combustor for insertion into the firebox of an existing stove. The housing engages and hermetically seals against the ceiling of the firebox surrounding the flue outlet of the stove to define an airtight passageway for volatile gases from the firebox to the flue outlet. The housing further defines a pair of secondary combustion air inlets and connected conduit for heating and then directing secondary air into the defined passageway to mix with the volatile gases upstream of the catalytic combustor. A bypass door is also mounted within the housing for selectively allowing the volatile gases to bypass the combustor in passing from the firebox to the flue outlet.

Abstract: Stove for burning solid fuels, particularly wood. The stove has a pedestal which has a primary air inlet and an ash drawer; an upright rectangular main housing which is divided internally into a fire box section and a section for combustion products; a housing for electrical components on the back of the main housing; and a flue. The partition between the fire box and the top portion has a first passageway with a catalyst therein and a damper-controlled bypass passageway. Primary air is admitted beneath the grate and passes upwardly therethrough. Secondary air is admitted to the fire box near the glass-panelled charging doors for solid fuel. The stove has a catalyst chamber for completing combustion of the incompletely burned gases in the fire box.

Abstract: A butterfly-type step subassembly includes a substantially planar valve disc member having a peripheral groove formed in opposite surfaces thereof. Projecting inwardly from the internal walls of the subassembly housing are two non-coplanar, generally semicircular valve seat members having passageway(s) in them communicating outside the housing with a source of purified gas(es). The passageways terminate interiorly in apertures in respective recesses in the seat members positioned to be brought into communication with said grooves when said valve disc member is in substantial contact with said seat members. Means are provided to supply said purified gas(es) to said passageways in response to the movement of said planar disc member to the nominally closed position so that said gas(es) flow into the contact region between the disc and seat members under sufficient pressure to prevent said effluent from flowing through said valve when nominally closed.

Abstract: A system is described for use in the stack or flue ducts of a fossil fueled combustion system to eliminate or substantially reduce SO.sub.x and NO.sub.x emissions. The system includes an electrically operated stable glow discharge maintained between separate resistively ballasted pins and opposing plane electrodes. The electrochemical reactor of this invention electronically activates, reacts and chemically modifies the selected pollutants to render a thermodynamically stable solid product.

Abstract: Solid fuel heating appliance having high thermal efficiency and low levels of polluting emissions. The heating appliance includes an insulated secondary combustion chamber where a mixture of exhaust gases from the primary combustion chamber and secondary air is burned. A catalytic igniter is provided in the secondary combustion chamber to lower the ignition temperature of the unburned volatile gases from the primary combustion chamber. Regenerative feedback structure is provided in heat exchange relationship with the exhaust from the secondary combustion chamber to preheat the mixture entering the secondary combustion chamber, catalytic igniter, and the regenerative heat transfer assure substantially continuous combustion within the secondary combustion chamber even when conditions in the primary combustion chamber change.

Abstract: Disclosed herein is a preferred process for making a catalyst. A catalyst such as is named in the title of this invention. The process begins with the chosing and blending the different refractories in order to necessitate the longevity of the damper. The mixing of the materials, with water, to the right consistency is very important in this process. To much moisture in the material will not provide the necessary porosity the catalyst needs. After mixing, the dampened material is placed into a two piece break away mold and pressed into the desired shape, size and density. The proper amount of curing time and the damp cool area in which the curing is to take place also adds to the longevity of the damper. The object of this invention is to provide an inexpensive process that doesn't require heat, for manufacturing a catalyst that will not become contaminated or less active with use, but by it's causing a more complete combustion, will create a higher BTU output and a decrease in fuel consumption.

Abstract: A porous shield of silicon carbide is incorporated into the outlet of a furnace for shielding the downstream components from radiation of heat from the furnace and to minimize the heat radiated from the furnace.

Abstract: This invention relates to a modified furnace for treating low-quality acid gas streams (those containing less than fifty percent (50%) hydrogen sulfide) to permit stable operation of combustion to provide a Claus furnace effluent. The system comprises burning a fuel gas and indirectly supplying the heat of this combustion to the hydrogen sulfide oxidant reaction wherein the hydrogen sulfide is converted to sulfur and other sulfur-containing products.

Abstract: A wood-type solid fuel fired water heater of modular construction includes a radiation heat transfer section or module in the form of a first annular or cylindrical side wall of refractory material. A water circulating first coil is embedded in the inner surface of the first annular side wall or cylinder to provide a partial water wall or water jacket in the refractory material. The first annular side wall defines the combustion chamber and locus of combustion for direct radiant heating of water in the first coil. The convection heat transfer section or module is formed by a second annular side wall or cylinder of refractory material positioned above the first annular side wall. A second coil for water circulation is mounted inside the second annular side wall but spaced from the inner surface for circulation of hot flue gas around the second coil for convection heating of water in the second coil.

Abstract: A wood or coal burning heater or stove employing a catalytic combustor in its combustion chamber having a primary air supply which feeds air to the fuel, and a secondary air supply which feeds air directly to the catalytic combustor by means of an air diffuser which sprays air evenly over the undersurface of the catalytic combustor. Combustion gases from the burning fuel in the combustion chamber pass through the catalytic combustor to a heat exchanger and then to an exhaust flue. The primary and secondary air supplies are simultaneously controlled so that maximum primary air and reduced secondary air are supplied when maximum heat is demanded, and reduced primary air and maximum secondary air are supplied when minimum heat is demanded. The ratio of primary to secondary air is precisely controlled to maximize overall heating efficiency consonant with high BTU output.

Abstract: A catalytic stove comprised of a housing having a fuel burning chamber and an effluent chamber separated by a domed common wall. An air inlet port is located in the fuel burning chamber and draft air is introduced to burning fuel through an apertured thermal control unit which detects changes in stove temperature. A closure flap is rotatable across the aperture. The thermal control unit, the flap and the aperture cooperate to ensure that the effective area of the aperture changes by an amount approximately proportional to the square of the magnitude of any change in the stove temperature detected by the thermal control unit. Effluent from the fuel flows substantially directly and smoothly from the fuel to a finned holder at the top of the domed wall. The fins then create turbulence in the combustible gases emanating from the burning fuel.

Abstract: A slag tap combustion apparatus which is characterized by comprising a slag tap combustion furnace, a slag granulation chamber for granulating a slag discharged from the slag tap combustion furnace, a slag grain accumulation tower which is filled with slag grains discharged from the slag granulation chamber, a secondary reactor provided with an inlet and an outlet for a waste gas from the slag tap combustion furnace and provided with means for introducing finely powdered lime, a duct for connecting the waste gas outlet of the secondary reactor to the slag grain accumulation tower, and another duct for allowing the waste gas to discharge from the slag accumulation tower.

Abstract: Disclosed herein is an improved wood burning stove having a combustion chamber and a flue for removing exhaust from the chamber wherein the improvement comprises the addition of a catalytic converter means for oxidizing oxidizable species in the exhaust. In one embodiment, the catalytic converter means is situated in a flue immediately adjacent the combustion chamber. In another embodiment, the catalytic converter means is situated in the combustion chamber itself. In addition the nature and structure of a catalytic converter means have been determined for marginal acceptable and optimum performance with adequate pressure drop thereacross.