Abstract: A vaporization burner for a heating device operated with liquid fuel, particularly a motor vehicle heating device, has a combustion pipe defining a combustion chamber, and an absorbent body arranged on a carrier, fuel being supplied to the absorbent body via said carrier. At least part of the carrier is not covered by the absorbent body, the uncovered area is provided with a through-opening. An ignition device is arranged behind the carrier and, preferably, extends into an ignition chamber, formed behind the carrier, by an ignition housing having a wall with an opening for supplying combustion air into the ignition chamber. Fuel, which has been vaporized by the absorbent body, reaches the ignition chamber via an opening in a portion of the carrier covered by the absorbent body and forms a combustible mixture. The mixture in the chamber is ignited by means of the ignition device, resulting in a pilot frame which extends through the through-opening in the uncovered area of the carrier.

Abstract: Water heating methods and apparatus feed a combustible mixture of gas and air to an axial inlet of a cylindrical radiant surface burner and conduct water to be heated through a heat exchanger encompassing that cylindrical radiant surface burner as a cylindrical structure having first passages for combustion gases therethrough substantially radially of the cylindrical radiant surface burner and the heat exchanger.

Abstract: An efficient gas-fired bayonet-type heater has been developed to challenge the dominant position long enjoyed by the electric bayonet-type heater. The new heater replaces the electric resistance element in the bayonet-type heat exchange shell with a tubular porous fiber burner having a high length-to-diameter ratio attached to a long feed tube for the gas-air mixture. An annular space around the burner and feed tube within the shell provides the path for the combustion gases to flow to a discharge opening near the entry point of the gas-air mixture.

Abstract: Laminated object comprising sintered metal fibre webs at least one web of which consists of application-active metal fibres joined to an adjacent mixed-fibre web and a carrier. Depending on the nature of the active fibres, the object is e.g. applicable in membranes for radiant burners, in catalysts and wear-resistant seals.

Abstract: A radiant burner comprising a screen and a radiant plate enclosed by a peripheral band and associated with a body defining the premixing chamber. In said burner, there is provided, bearing against an upper flange of the band, a ceramic frame having an internal peripheral structure which enables the grate to be supported. Provision being also made of resilient means.

Abstract: A far-infrared radiating system comprises a far-infrared radiating element (2) such as a ceramic, adhered to a metallic material (1) and radiating far-infrared rays upon heating. The system is constructed of a primary-radiating element (5) which is made of a metallic material while heated by a combustion gas passing therethrough and a secondary-radiating element (3) provided with the far-infrared radiating element (2) adhered to the metallic material (1). The primary-radiating element (5) is spaced apart and oppositely disposed from the secondary-radiating element (3) which is heated by infrared rays radiated from the primary-radiating element (5) having been heated with a combustion gas passing therethrough, whereby the secondary-radiating element (3) radiates far-infrared rays.

Abstract: There is disclosed a gas-fired water heater/boiler apparatus with a unique burner assembly that provides high levels of BTU/hour input making it suitable for commercial installations. The gas burner includes a pair of superimposed tubes, each having evenly distributed perforations of a different uniform size, that are rolled flush together and provide a thick walled burner with greatly increased strength and resistance to premature failure while furnishing an optimum flame pattern. The gas burner projects into the interior of a vertical, cylindrical array of finned heat exhanger tubes through which the fluid to be heated is circulated. The water heater/boiler apparatus is compact and thermally insulated by a pressurized forehearth and may be installed on combustible floors or in closets with zero clearance.

Abstract: This invention relates to a burner with low emission of polluting gases, comprising, in a conduit, an injector of fluid fuel which creates in the conduit, supplied with combustion-supporting air heated in an exchanger, a fuel/air mixture. The latter burns, creating a flame which clings to a stabilizer constituted for example by a hollow piece, of V-section, obturating a central part of the cross-section of the conduit. Downstream of this stabilizer there is placed an obstacle causing a local reduction follwed by a sudden increase in the cross-section of the conduit in order to promote oxidation of the carbon monoxide.

Abstract: Improved combustion of liquid fuel is achieved with a porous fiber burner by forming a mixture of the vaporized fuel and all of the desired combustion air sufficiently heated to prevent condensation of the vaporized fuel, and introducing the heated mixture into the porous fiber burner to effect flameless combustion on the outer surface of the burner. The resulting surface combustion produces a high proportions of radiant heat and increased thermal efficiency while suppressing the formation of nitrogen oxides and other pollutants in the flue gas. Periodically, fuel gas may be supplied to the same porous fiber burner.

Abstract: A liquid-fueled thermoelectric field burner operable in two modes, a start-up mode and a steady-state mode. A rechargeable battery backed up by a manually operated generator permits cold start-up of a preheat burner followed by operation of a main burner which provides heat to thermoelectric converters which operate to provide necessary power for steady-state operation. Cold start-up is facilitated by atomizing the liquid fuel for combustion in the preheat burner, and steady-state blue flame operation is enhanced by mixing vaporized fuel and preheated air for combustion in a main burner. The thermoelectric converters are cooled by air from a cooling blower.

Abstract: A catalytic bed has an upright forward surface openly exposed to the living space and generates a partially laminar flow and a partially turbulent flow of substantially smokeless gaseous combustion products upward along the bed surface, with laminar flow adjacent thereto and the turbulent flow positioned forward thereof. A collection chamber is positioned above the bed and has spaced apart lower and upper walls to define a rearward collection chamber and a forward inlet space. A negative pressure source is connected to the collection space to create an exhaust flow therefrom. A baffle wall extends laterally and projects upwardly from the lower wall toward the upper wall, terminating at a distance therefrom to create a pressure drop between the collection and inlet spaces sufficient to provide a substantially uniform draw along the length of the baffle wall.

Abstract: A gas burner having a forced air intake and a combustible gas intake. A source of primary air also feeds secondary air to the combustion products at approximately the level of the surface of a plate through which combustion products escape.

Abstract: A fiber matrix burner and method of manufacture in which a shaped burner element is formed by accreting a slurry onto a foraminous support. The slurry is comprised of ceramic fibers, a binding agent, a vaporizable filler, and a powdered, normally non-flammable aluminum alloy having a melting point between 660.degree. C. and 1,000.degree. C. After the drying and firing, a porous matrix of the fibers is formed which flamelessly combusts a fuel-air mixture. During combustion, the aluminum alloy inhibits growth of alumina crystals on the fiber surface to prolong burner life and, in addition, protects the burner both from extreme temperature and flashback.

Abstract: Burner (1) for a gaseous fuel comprising a distributing zone (2) surrounded by an outer wall (4) of a porous medium, an air supply tube (9) debouching in the distributing zone (2), a fuel supply tube (12), and a mixing head (13) arranged in the air supply tube (9), which mixing head (13) comprises a box (15) in which the fuel supply tube (12) debouches and open-ended mixing tubes (23 and 24), which extend through the box (15), wherein the part of the wall of a mixing tube (24 or 25) located in the box (15) is provided with openings (29).

Abstract: A burner apparatus is disclosed having a burner body and a burner case with a thermally insulated metal bracket interposed therebetween to connect the burner body to the burner case and control the temperature rise of the burner case during operation of the apparatus with respect to the temperature of the burner body.

Abstract: A gas-fired radiant tube that employs heterogeneous catalytic combustion, and a high combustion efficiency, low NO.sub.x catalytic combustion radiant tube heating system, incorporating the radiant tube, are disclosed. In the system, essentially mirror image, combined inlet/exhaust units containing heat regenerator units are connected at opposite ends of the catalytic combustion tube. Combustion flow is cycled back and forth through the units and the combustion tube so that during any given cycle the hot exhaust gases heat the regenerator in the exhaust side of the flow for preheating the inlet gases during the next, reversed flow cycle and the natural gas fuel is completely oxidized. Thus, the cycled flow completely consumes the fuel and constantly preheats inlet air so that the sytem provides both high combustion efficiency and high thermal efficiency.

Abstract: An insulated reflector for a low-intensity radiant energy heating system. Several embodiments are disclosed. In one embodiment, the reflector forms a chamber which is used to preheat fresh air admitted to the heated area.

Abstract: There is disclosed a gas-fired water heater/boiler apparatus with a unique burner assembly that provides high levels of BTU/hour input making it suitable for commercial installations. The gas burner includes a pair of superimposed tubes, each having evenly distributed perforations of a different uniform size, that are rolled flush together and provide a thick walled burner with greatly increased strength and resistance to premature failure while furnishing an optimum flame pattern. The gas burner projects into the interior of a vertical, cylindrical array of finned heat enchanger tubes through which the fluid to be heated is circulated. The water heater/boiler apparatus is compact and thermally insulated by a ressurized forehearth and may be installed on combustible floors or in closets with zero clearance.

Abstract: Improved burner constructions for gas-fired infra-red generators having ceramic fiber matrix through the thickness of which gaseous combustion mixture is passed and as it emerges it is burned to heat emerging surface to incandescence. Burner matrix can be loaded with silicon carbide particles to improve its emissivity, can be made water-repellent and its uniformity can be improved. Burner body can be casting, with sheet metal addition to form a baffle and air-seal and to grip matrix edges. Combustion mixture plenum can have movable partition assembly separating it from air seals, to adjust portion of matrix at which incandescence is generated. Metal screen can be stretched in front of incandescent surface to assist with low-temperature operation. Large size matrix can have central support fitted and secured to back of burner body. Air seal can be provided by narrow curtain of air extending around internal faces of burner body.

Abstract: An improved combustion element for a radiant energy burner. The element comprises a generally cylindrical metal screen having its outer end closed off by an end closure, while the inner end is connected to a source of gaseous fuel. Strands of ceramic material are braided directly on the outer surface of the screen to form a braided sleeve which is snugly fitted over the entire periphery of the screen.

Abstract: A catalytic combustion and heat transfer device for use in a deep fat fryer is disclosed, characterized by increased efficiency and heat transfer. The device includes a hollow elongated heat exchanger having a generally oval interior cross-sectional configuration. A catalytic burner is mounted within a combustion end of the heat exchanger and a unique core buster and heat exchange fin arrangement is mounted within the flue end of the exchanger. The fin arrangement comprises a plurality of generally U-shaped tapered fins arranged in opposed pairs and connected with the inner side wall surface of the exchanger, with the leg portion of each opposed pair extending toward each other in spaced relation. The core buster is arranged between the opposed pairs of fins in contiguous relation with the free end edges thereof to define a plurality of channels within the fins, respectively. A spark ignition device is mounted adjacent the catalytic burner to ignite a combustion mixture supplied to the burner.

Abstract: A heating boiler having a vertical, completely premixing burner tube arranged in a space shut off at the top includes concentrically relative to the burner tube a helical water tube surrounded by an upwardly extending flue gas discharge jacket. The burner tube comprises a lower circumferentially closed tubular mixing portion and an upper portion having burner ports formed by a plurality of stacked alternately flat and radially corrugated annular discs held together by a flat top plate connected through a bolt or the like to a cross piece or the like wedged in an internally tapered upper end of the circumferentially closed tubular mixing portion.

Abstract: For a heater operated by means of liquid fuel, a vaporization burner is provided that has a large-volume active first vaporization part for the very volatile components of the fuel and a large-surface second vaporization part for the least volatile fuel components. The two vaporization parts are separated from one another by a fuel-impermeable material, such as ceramics, so that any occurring coke formations at the second passive vaporization part cannot migrate to the first vaporization part. As a result, the operating reliability and the service life of such a vaporization burner are improved.

Abstract: A burner has a combustion body supporting a platinum-group catalyst. An air-fuel mixture is supplied to the combustion body and combusted primarily on the upstream surface of the combustion body. A heat-transmissive body is disposed for discharging heat radiation from the upstream surface of the combustion body. The burner has a greater heat radiation efficiency and a wider range in which the amount of combustion is variable than conventional catalytic combustion burners.

Abstract: A burner comprising a primary mixing chamber having one or more gas inlets and one or more primary air inlets; and one or more secondary mixing chambers, a perforated portion being provided in a side wall of each of said secondary mixing chambers, and each of said secondary mixing chambers communicating with the primary mixing chamber; each primary air inlet 6 comprising an aperture in a wall of the primary mixing chamber and a sliding member attached to the primary mixing chamber over the aperture and movable between a first limit position when the aperture is completely covered by the member and a second limit position when the aperture is completely uncovered by the member, means being provided to retain the member at any position intermediate the first and second limit positions.

Abstract: A high temperature surface combustion burner, comprises a burner head having an air fuel mixed gas supply inlet, a burner plate secured to said burner head, wherein the burner plate is made of a ceramic porous body having more than 30% by volume of pores of 25 to 500 .mu.m in mean pore diameter; and a plurality of throughholes having a 0.05 to 5.0 mm diameter and provided in said burner plate at intervals of 2 to 30 mm and substantially vertically extending with respect to the combustion surface.Another surface combustion burner comprises a burner head having an air fuel mixed gas supply inlet, a burner element secured to said burner head, said burner element consisting of a ceramic porous body having pores sufficiently communicated from its inside to its outside for diffusing an air fuel mixed gas, wherein said ceramic porous body has 75 to 95% by volume in total of communicated pores of 0.5 to 5.0 mm in mean pore diameter; and a plurality of throughholes each having a hydraulic diameter of 0.05-5.

Abstract: A radiant gas burner has a gas plenum and a surrounding non-combustible gas plenum. In this structure, a matrix which is gas permeable is clipped into the first gas plenum by means of a sintered metal plate that extends from the wall of the non-combustible gas plenum over the peripheral edge of the matrix. The sintered metal allows both combustible and non-combustible gas to pass there through with substantially the same velocity.

Abstract: Zone-controlled radiant burners are provided for retrofit installation in existing heaters. The burners comprise hollow cylindrical fiber matrix layers with baffles forming separate plena. A main stream of pre-mixed fuel and air is directed into the middle plenum, with the mixture flowing through the fiber matrix layer and incandescently combusting on the active surface zones to radiantly heat the tube coils. A reduced flow of fuel/air mixture, or only air, is directed into the remaining plenum so that the surrounding surface zones are combustibly less active or inactive to avoid destructive overheating of the burner surfaces.

Abstract: This invention relates to a barbecue grill, and in particular to a high pressure gas fired barbecue grill having perforated ceramic heating elements which emit infrared radiation. A pair of steel rods are suspended in a cast aluminum housing, and a pair of plenum chambers are suspended therebetween. The upper surfaces of each plenum chamber comprises a pair of perforated rectangular ceramic blocks separated by an imperforate metal plate. The bottom of the housing is open, and has a tray carried proximate the opening for food particles.

Abstract: An advanced compact heater which includes a radiant section of tube coils nested about a plurality of tiers of vertically spaced-apart fiber matrix burners. Each burner is comprised of a hollow cylindrical shell of a fiber matrix material with an oval cross-section of optimum height-to-width aspect ratio and a long length-to-height aspect ratio. A process fluid or water is directed through the radiant coil of tubes disposed in vertical arrays on opposite sides of the burner tiers. Pre-mixed fuel and air flamelessly combusts on the active sections of the burner surfaces permitting narrow burner-to-coil spacing with a compact heater size and reduced capital cost in relation to the heat input rating. Exhaust from the burners flows in heat exchange relationship past tube coils in a convective section for extraction of residual heat.

Abstract: Improved burner constructions for gas-fired infra-red generators having ceramic fiber matrix through the thickness of which gaseous combustion mixture is passed and as it emerges it is burned to heat emerging surface to incandescence. Burner body can be casting, with sheet metal addition to form a baffle and air-seal and to grip matrix edges. Combustion mixture pelnum can have movable partition assembly separating it from air-seals, to adjust portion of matrix at which incandescence is generated. Metal screen can be stretched in front of incandescent surface to assist with low-temperature operation. Thermal insulation on external portions of burner body can also be held in place with screening. Large size matrix can have central support fitted in joint between matrix segments, and secured to back of burner body. Air-seal can be provided by narrow curtain of air extending around internal faces of burner body.

Abstract: A combustion chamber (1; 101), is surrounded by a heater (4; 104), by means of which a constant temperature in the order of 850.degree. C. can be maintained in the chamber (1; 101). The chamber (1; 101) has arranged therein devices (17, 18, 117) which, when the arrangement is in operation, partly obstruct the passage of gas through the chamber. The waste gases to be treated are introduced into the chamber (1; 101) through an inlet (2; 102) and the treated, residual waste gas is discharged from the chamber through an outlet (3; 103). The arrangement also includes a supply line (14,15,16, 114,115) for supplying pre-heated reaction medium to the interior of the chamber (1; 101).

Abstract: A non-catalytic porous-phase combustor and process for generating radiant energy wherein the gas phase reaction and combustion take place within the pores of a multilayer porous plate to provide higher combustion intensity and to provide a greater proportion of heat released by radiation. The combustor comprises a porous plate having at least two discrete and contiguous layers, a first preheat layer comprising a material having a low inherent thermal conductivity and a second combustion layer comprising a material having a high inherent thermal conductivity and providing a radiating surface. Combustion intensities of about 400,000 to about 750,000 Btu/hr-ft.sup.2 may be achieved in the combustion layer of the porous phase combustor.

Abstract: A wireless hand held hot air hair dryer comprises a nozzle for exhausting air, a heating chamber disposed proximate the nozzle, a fuel reservoir for storing a vaporizable fuel in a liquid state, and catalytic heating means in fluid flow communication with the fuel reservoir and including a catalyst member disposed within the heating chamber for combusting vaporized fuel supplied from the fuel reservoir. The dryer further includes a battery-powered motor and a fan driven by the motor for passing air through the heating chamber so as to contact said catalyst member, to thereby heat the air prior to exhausting through the nozzle. Manually operated control means are also provided for controlling the amount of current applied to the motor and proportionally adjusting the flow of fuel to the heating means to thereby regulate the temperature of the heated air in relation to the amount of air flow exhausted through the nozzle.

Abstract: An improved gas-fired radiant heater is disclosed, particularly useful in drying continuous web materials, wherein a partially compartmentalized manifold chamber is formed beneath an extended series of porous ceramic tiles for evenly distributing a predetermined gas-air mixture of fuel so that upon ignition there is provided a continuous burning surface along the entire length of the tiles. A plurality of baffle members are disposed throughout an elongated manifold housing to compartmentalize lower portions of the manifold chamber and thereby permit the proper flow of fuel through the heater to generate a more uniform radiant heat field. An air jacket assembly surrounding the manifold chamber is further provided and includes an outer casing into which cooling air is injected and circulated throughout the length of the heater.

Abstract: A dual stage combustion furnace has primary and secondary combustion chambers. The primary combustion chamber contains a solid fuel, such as wood or coal. The secondary combustion chamber is formed adjacent to and in communication with the primary combustion chamber for containing and igniting volatile combustion gases produced in the primary chamber. A plurality of hollow members, which provide a grate, extend through the primary chamber, and into the secondary chamber. Volatile gases given off in the primary combustion chamber are then ignited and burned in the secondary combustion chamber upon combination with heated air passing through the hollow grate members.

Abstract: A catalytic combustion device of the type including a catalyst for oxidation of a fuel vapor and air, and an ignition heater for initiating oxidation on the catalyst is disclosed. The device comprises a tubular first member carrying thereon the catalyst for supplying the fuel vapor to the catalyst, and a tubular second member disposed in the first member defining therein a passageway for the fuel vapor, the second member being secured at its one end thereof to the first member so as to constitute a thermostatic element for controlling the rate of gas flow by means of the difference in thermal expansion between the first and second members.

Abstract: Radiant burners are provided with a pair of opposed mounting legs for ready installation and removal from a support structure having a pair of spaced parallel support rails without utilizing bolts, other fasteners, or special tools. One leg has a C-shaped engagement portion adapted to hookingly engage about and receive one support rail, while the other leg includes an L-shaped engagement portion with detents at the free end thereof to resiliently engage the other rail by a snap fit.

Abstract: An apparatus for heating air wherein the combustion is dispersed in direct proximity to a metal hydride fuel storage means in order that the combustion heat effects the release of hydrogen from the metal hydride. The combustion area contains a catalyst and a semipermeable membrane separates the hydride fuel storage means and the combustion area. The temperature of the metal hydride is raised to effect initial release of hydrogen which passes through the semipermeable membrane, mixes with air and is combusted at the catalyst. The heat of combustion, in direct proximity to the metal hydride, perpetuates the hydrogen release.

Abstract: A vaporization burner of the type that has a carrier connected with a fuel line on which an absorbent body is located is provided with a heat conducting body for quicker fuel vaporization and for increasing the temperature on the surface of the carrier that faces the combustion chamber. The heat conducting body is formed of a heat resistant and highly heat conductive material and projects into the flame zone of the combustion chamber. The heat conducting body may be attached releasably to the carrier or it may be fastened to it by means of press welding. The heat conducting body may be developed as a hollow body, preferably as a piece of pipe, whereby the end projecting into the flame zone may be open or closed. For closing of the end of the heat conducting body that projects into the flame zone, when the conductive body is formed from a piece of pipe, the free end may be compressed. Furthermore, the heat conducting body may be arranged centrally or eccentrically on the carrier.

Abstract: A self-aerating radiant gas burner assembly comprises a mixing chamber (1) closed except for an air inlet (3) into which is directed a gas injector jet (4), of 0.5 to 2.0 mm bore, to induce flow of air through the inlet, the chamber being surmounted by a radiant burner element of ceramic foam material of a porosity between 15 and 40 pores per linear 25 mm and a thickness between 8 and 30 mm, the dimensions within these ranges being selected for a specified gas and pressure range with the relationship that the lower the gas pressure the larger the jet size.

Abstract: A gas-fired burner of the radiant type includes a boardlike heating element constituted by a porous matrix of refractory fibers, the periphery of one side of the heating element being bonded to and in fluidtight engagement with an open end of a sheet metal box functioning as a gas plenum. A combustible gas mixture is fed into the plenum and forced through the porous heating element for burning at the outer face thereof. The boardlike heating element is retained in position by a strip of perforated metal fixed to the outer surface of the sheet metal box and extending about the edge of the heating element, the strip being bent over to hold the edge of the heating element against the box. A multilayer blanket of thermal insulating material wrapped around the sheet metal box is held in position by bent metal tabs and by the bent strip of perforated metal retaining the heating element. A low cost diffuser assembly ensures optimum gas mixture flow within the plenum.

Abstract: Improved infra-red irradiators and use thereof for soldering, domestic water heating, furnace treatment, drying and moisture profiling of paper webs. Burners can have a ceramic fiber mat held over a shallow combustion mixture plenum essentially completely spanned by a baffle. Mats can have folded-in edges to permit close packing. The plenum can have a partition forming a small ignition compartment with an igniter against the covering portion of the mat. Burners can be fitted to heat radial chambers on a rotating table lehr.

Abstract: A surface-combustion radiant burner comprising a frame 1 of impermeable material supporting a porous element 2 permeable to gas and conduit means 7 to conduct a combustible gas mixture into a gas distributing space 5 enclosed by the frame 1 and the porous element 2, the porous element 2 being formed of metal particles of an alloy containing iron, chromium and aluminum and having the property of forming an alumina layer on heating in the presence of oxygen. And, a method of using such a burner for burning gas and air mixtures at high temperatures while minimizing nitrogen oxide production and burner corrosion.

Abstract: A catalytic stove is provided comprising a mixing chamber having one end adapted to receive a fuel can and an opposite end provided with a diffuser. A plate provided with a grid of between 200 and 400 openings per square inch extends across the exit end of the diffuser. A catalytic surface is coated on the exit portion of the plate. The catalyst is selected from the group consisting of platinum, palladium, rhodium and iridium.

Abstract: This invention is directed to a method and an apparatus to heat certain particles. These certain particles are heated to make them more desirable. In the heating of these particles, it is often desirable to expand the particles to make a light-weight aggregate. The light-weight aggregate may be used in making a building material or the like. In carrying out the process of heating these particles, there is used air for combustion of the combustible fuel and only a mimimum of air for carrying of the particles or expansion of the particles.

Abstract: Disclosed is a gas-fired cooktop for a range which provides high thermal efficiency and low emissions of air pollutants, particularly low levels of NO.sub.x. The cooktop includes a perforated tile burner which radiates infrared energy upward at a high flux rate to rapidly quench burner gas temperatures and inhibit the formation of NO.sub.x. A perforated glass-ceramic jet plate positioned between the burner and a cooking vessel transmits most of the radiant infrared energy from the burner to the vessel and also forms jets of combustion products which are directed against the bottom of the vessel for convective heating. Thermal efficiencies of up to about 70 percent and NO.sub.x emissions as low as about 15 parts per million are achieved by the cooktop.

Abstract: An evaporation burner comprises a burning unit having a hollow gas chamber therein and burning plates on its surface, a gas generating chamber through which a preheat burning flame may flow, an inlet window through which the preheat burning flame within the gas generating chamber may flow into the burning unit, and recirculation windows through which apart of the preheat burning flame entering into the burning unit may be recirculated back to the gas generating chamber. The gas generating chamber is located adjacent to the burning unit and substantially along the centerline of the burning unit. The burning unit and the gas generating chamber are communicated to each other. The recirculation windows are adjusted to vary their closing/opening degree, as desired, by an opening/closing damper.

Abstract: A radiant gas-fired burner having a back plate for connection to a supply of air and gas which, together with a combined refractory fiber pad-metal support structure, defines a plenum for supply of a combustible air-gas mixture. A foraminous metallic member is embedded within a porous pad of refractory fibers and interlocked therewith. Lugs affixed to the rear surface of the metallic member afford connection to said back plate in a manner allowing easy detachment therefrom without dismounting said back plate from its operative position. The burner has a rectangular surface that is uniformly radiant which was formed by vacuum-forming a refractory fiber felt onto the foraminous member. Metal foil around the periphery of the pad prevents gas flow from escaping through the side edge.

Abstract: A research burner having a water-cooled hemispherical head provided with a urved upper surface adapted as a seat for a flame which is surrounded by a shroud of inert gas. The burner provides for optical access to the various zones of the flame under study for both temperature and concentration of species in a compatible mixture.