Abstract: A burner that is useful for providing a melting flame whose axis can be altered during operation, and for providing a supersonic jet of oxidant that can penetrate through the surface of the molten material, has a unique combination of features including a specially contoured flame collar at its open discharge end.

Abstract: A gas burner includes a first tube and a second tube, wherein the first tube includes a first section and a second section which are connected to each other; the second section includes a chamber and an air outlet disposed at one side of the chamber; a cross-sectional area of the chamber of the second section is larger than a cross-sectional area of one end of the first section communicating with the second section. The second tube includes an air inlet section, a venturi section, and an extending section, wherein one end of the air inlet section includes an air inlet; the air inlet is adapted to supply gas; the venturi section is between the air inlet section and the extending section; the extending section extends into the chamber of the second section of the first tube and has a cross-sectional area small than the cross-sectional area of the chamber.

Abstract: A modular linear fireplace gas burner system having a plurality of interconnectable pipe modules and one or more burner members of varying length, each said pipe module having a pipe segment, spuds, orifice mounting blocks and mounting brackets to retain one of more of the burner members, wherein the distance D(o) between adjacent spuds on each pipe segment is equal and for joined pipe segments the distance D(c) between the outermost spud of one pipe segment to the outermost spud of the other pipe segment is equal to D(o).

Abstract: A burner apparatus which can be used as a side burner for an outdoor grill. The burner apparatus includes a burner head having a plurality of surrounding discharge ports and a flame guide element positioned in the burner head for receiving the combustible gas feed stream. The flame guide element has a plurality of guide openings which discharge the combustible gas stream into the burner head toward the discharge ports such that the combustible gas stream flows out of the discharge ports of the burner head at an angle which is preferably in the range of from 0° to about 30° upward from horizontal. This greatly increases the effectiveness and fuel efficiency of the burner by increasing the flame contact area for a cooking pot placed on the burner, allowing the use of a more shallow burner pan, and allowing the burner head to be raised.

Abstract: The present invention provides a gas burner (10) including: a distributor means (50) having at least one distribution chamber to distribute an air gas mixture around said distributor (50), said burner (10) including a plurality of flame ports (70) through which said gas mixture can pass and be ignited; at least one injector (39) associated with said distributor (50), said at least one injector (39) being positioned to inject gas into said at least distribution chamber via a venture formed of a vertically directed passage and transition port (64) and at least one venturi extension extending away from said transition port (64).

Abstract: A device for intensifying a flame, comprising an object intended to be placed in front of the burner head, at a distance from said burner head, so that it is placed at least partly inside a flame extending from the burner head, and furthermore, said object being arranged to glow, heated by said flame. An apparatus for applying the device, for heating a liquid or air, comprising a burner and a combustion chamber, wherein the apparatus comprises an object in the combustion chamber. In the method, the device is installed in front of the burner head, or in an apparatus for heating a liquid or air, comprising an opening for the burner head, and a combustion chamber.

Abstract: A method and apparatus for producing radiant heat in which a mixture of fuel and primary combustion oxidant is introduced into a combustion chamber having a heat radiating wall, which mixture has less than a stoichiometric requirement for complete combustion of the fuel, and igniting the mixture, forming heated partial combustion products. At least a portion of the heat in the heated partial combustion products is transferred to the heat radiating wall. The heated partial combustion products are passed from the combustion chamber into an exhaust gas plenum disposed adjacent to the combustion chamber. A secondary combustion oxidant is introduced into the exhaust gas plenum in an amount sufficient to complete combustion of the partial combustion products, forming exhaust gases. Heat in the exhaust gases is transferred to the primary combustion oxidant disposed in a combustion oxidant plenum disposed adjacent to said exhaust gas plenum.

Abstract: A system for converting fuel and air into reformate with a reformer which has a reaction space, a nozzle for supplying a fuel/air mixture to the reaction space, and a fuel feed for supplying fuel to the nozzle. In the reaction space, there is a breaker body for a fuel/air mixture supplied through the nozzle.

Abstract: An operating and control package for at least one pressurized burner. The operating and control package comprises a controller and a gas control device. The controller is an integrated packaged unit for supplying and controlling a pre-mixed air/gas pressurized burner. A housing is provided for containing the controller. The housing is preferably located at the end of the burner manifold. The gas control device comprises a gas control valve for receiving gas entering the control package and a premix blower located within the housing for receiving gas from the gas control valve and air entering the control package. The gas control device mixes the air and gas to form a pressurized combustible mixture which is fed into the burner.

Abstract: A gas burner for an infrared oven provides fast and controllable infrared energy, the emitted spectrum of which varies continuously over a wide spectrum. The burner is assembled from an elongated fuel distribution chamber having an open top and into which a gaseous fuel and combustion air is introduced. As the fuel mixture is delivered into the fuel distribution chamber, it eventually fills the chamber and thereafter flow through a double-layer wire mesh burner plate set over the fuel distribution chamber. The fuel combusts above the wire mesh burner plates to heat a screen wire above the burner plates. The screen wire is heated to a temperature at which the screen wire emits IR. The emitted IR wavelength can be controlled by controlling the gas supply to turn the combustion on and off according to the amount of IR heated needed.

Abstract: Gas burner for a dryer including a gas nozzle for receiving, and injecting gas, a mixing tube for mixing the gas injected from the gas nozzle and primary air, igniter fitted to an outlet of the mixing tube for igniting the gas mixed with the primary air coming out of the outlet of the mixing tube, and a flame holder fitted to the outlet of the mixing tube having flame holes for splitting, and ejecting the gas mixed with the primary air in burning the gas, thereby forming shorter flame lengths, and securing stability of the flame by enhancing an initial igniting capability, and splitting the flame into many parts to increase introduction of secondary air into the flame.

Abstract: The present invention is to provide a gas lighter, which comprises a nozzle provided at one end of a barrel extended forwardly from a housing, an auxiliary ceramic sleeve member provided at one end of a ceramic sleeve member in the barrel adjacent the nozzle, a metal ring provided at one end of the auxiliary ceramic sleeve member distal from the sleeve member, a radial metal filament provided in the metal ring, and a metal block provided in a center of the metal filament, wherein an ignition is adapted to generate flame at the end of the nozzle and burn the metal block to be hot enough to ignite gas fuel, and in a case of flame extinguished suddenly by wind, the metal block is adapted to ignite flame again in a very short period of time. As a result, it is possible of preventing large gas from leaking accidentally.

Abstract: Flashback protection is provided proximate the head of a cutting torch by a fitting, which can be in the form of an adapter or a cutting tip for mounting to the head. The fitting includes a check valve and porous structure for restricting flashback.

Abstract: Flashback protection is provided in or proximate the head of a cutting torch by a fitting, which can be in the form of an adapter or a cutting tip for mounting to the head. The fitting includes a body and porous structure that is preferably carried by the body and is a distinct component from the body. The porous structure has a multiplicity of convolute passageways extending therethrough for restricting flashback.

Abstract: A cooking appliance includes burners having ports that are aligned in a defined alignment with respect to an adjacent structure of a burner body or the cooking appliance within a piloting zone so that the adjacent structure guides the formation of a flame kernel at an outlet of the port. The adjacent structure may be ports which also form flame kernels withing the piloting zone of the burner port outlet, a structural portion of the burner body such as an extended lip protruding beyond the burner port or a separate structure such as a flame rod or other target that stabilizes the flame kernels at the burner port outlet. Such structures provide a method for improving the turndown ratio of burners by preventing lifting or backlash of the flame kernels generated at the burner port outlets by aligning the ports in conjunction with an adjacent structure within a piloting zone.

Abstract: A swirl-type internal flame recirculation burner apparatus and method as used to fire asphalt plant aggregate dryers, air heaters and calcining kilns and method includes a compressed air oil atomizer assembly. The burning and swirling fuel and primary main combustion air mixture recirculates upstream along the burner axis. The secondary main combustion air may be swirled. The burner may also be fired on gas or a combination of gas and oil.

Abstract: Flashback protection is provided in or proximate the head of a cutting torch by a fitting, which can be in the form of an adapter or a cutting tip for mounting to the head. The fitting includes a body and porous structure that is preferably carried by the body and is a distinct component from the body. The porous structure has a multiplicity of convolute passageways extending therethrough for restricting flashback.

Abstract: The invention relates to an atomizer burner for a motor vehicle heater, with a cobustion chamber which contains a baffle barrier and with an atomizer means (2) which atomizes the fuel into the combustion chamber, characterized in that within the combustion chamber in the atomization direction of the fuel at a distance from the atomization point of the atomizer means (2) which is smaller than the diameter of the combustion chamber or the diameter of a cylindrical heat shield (8) which extends in the combustion chamber there is a baffle plate (18) which acts as a baffle barrier.

Abstract: In a fuel gas burner, a reduction of NOx emissions is brought about by the combined use of both a catalyst and a radiation baffle. The catalyst and baffle are located in serial flow relationship such that each contributes to the NOx reduction function without the creation of undesirable conditions. The catalyst is located upstream of the flame and the amount of primary air supplied to the burner is controlled so as to bring about a reduction of NOx emissions while at the same time not allowing the temperature of the catalyst to exceed a threshold limit, thereby ensuring an acceptably long life and durability of the catalyst. The radiation baffle is located in the flame to radiate heat away therefrom and lower the temperature thereof to reduce NOx emissions, with the mass of the baffle being limited such that no significant levels of CO are generated.

Abstract: Low NOx axial premix burner apparatus and methods for burning fuel gas are provided by the present invention. The methods of the invention are basically comprised of the steps of mixing a first portion of the fuel gas and all of the air to form a lean primary fuel gas-air mixture, discharging the lean primary fuel gas-air mixture into the furnace space whereby the mixture is burned in a primary combustion zone therein, discharging a second portion of the fuel gas into the primary combustion zone to stabilize the flame produced therein and discharging the remaining portion of the fuel gas into a secondary combustion zone in the furnace space.

Abstract: In a gas-burning apparatus, such as a furnace, a device for reducing NOx emissions includes a cup member mounted proximate to an inlet to a combustion chamber of the apparatus and a perforate member attached to the cup member and located in the combustion chamber at a predetermined distance inwardly from the inlet. The perforate member has a plurality of holes to define a mesh pattern through which the flame and other products of combustion are constrained to pass within the combustion chamber. The perforate member acts as a heat sink to reduce the flame temperature, thereby inhibiting NOx production.

Abstract: The object of this invention is to provide a combustion device for cooking gas burners. In the combustion device, a frusto-conical flame guide cover (30) having an inclined side surface (31) is seated at the center of the inside area (11) of an annular-shaped bumer head (10). In such a case, the nozzle tips (20) are inclinedly arranged on the bumer head (10) such that the axes of the mixed gas outlets (24) of the tips (20) are converged at a predetermined height of the central axis (32) of the flame guide cover (30). The combustion device of this invention effectively uses low pressure and low price gases such as LNG and quickly generates high temperature heat expected from the conventional middle pressure or high pressure gas burners.

Abstract: The invention relates to an atomizer burner for a motor vehicle heater, with a combustion chamber which contains a baffle barrier and with an atomizer means (2) which atomizes the fuel into the combustion chamber, characterized in that within the combustion chamber in the atomization direction of the fuel at a distance from the atomization point of the atomizer means (2) which is smaller than the diameter of the combustion chamber or the diameter of a cylindrical heat shield (8) which extends in the combustion chamber there is a baffle plate (18) which acts as a baffle barrier.

Abstract: Low NOx axial premix burner apparatus and methods for burning fuel gas are provided by the present invention. The methods of the invention are basically comprised of the steps of mixing a first portion of the fuel gas and all of the air to form a lean primary fuel gas-air mixture, discharging the lean primary fuel gas-air mixture into the furnace space whereby the mixture is burned in a primary combustion zone therein, discharging a second portion of the fuel gas into the primary combustion zone to stabilize the flame produced therein and discharging the remaining portion of the fuel gas into a secondary combustion zone in the furnace space.

Abstract: A compact torch for use in semiconductor processing which may be used both to produce steam and to perform wet or dry dichlorethylene (DCE) oxidation at varying concentrations with no reconfiguration of the torch, providing full temperature of control of the oxidation product gases, with redundancy to provide automatic backup of heating and ignition elements, and with non-mechanical flow control of the oxidation product gases.

Abstract: An infrared radiation source is provided by directing combustion gases through a honeycomb mantle along the axis of symmetry thereof. The honeycomb mantle is formed of individual tubes disposed at an angle to the axis of symmetry of the mantle and is closed at the end away from the combustion gas input. The mantle may contain a structure to divert the combustion gases therein to aid in uniform heating.

Abstract: A burner for combusting fuel gas and air in an enclosure having a burner block member of non-combustible material, such as ceramic, having a central rectangular or square opening. Said burner block being located between the surface to be heated and an enclosure wall opposite said surface, said central rectangular or square block opening being used to shape the combustion flame in a flat or fan shaped fashion parallel to the enclosure wall surface. In such an arrangement, the burner's purpose is to direct combustion flame upon the enclosure wall which is heated by the flame and radiates heat back towards the surface area to be heated and to reduce the oxygen content which serves to reduce the peak flame temperature of the combustion process to thereby reducing NO.sub.x production.

Abstract: A mixing/quenching device is in the form of a perforate metal sheet or screen secured at the downstream end of a belled orifice with the perforations defining a plurality of flow paths. The dividing and combining of the flow is passing through the flow paths provides turbulence such that thermal NO.sub.x is reduced.

Abstract: A powered multi-fuel burner has a burner assembly which utilizes an air aspirated nozzle. An air compressor provides air to the air aspirated nozzle and to a fuel-holding tank where the fuel within the tank is put under air pressure thereby to enhance its flow to the air aspirated nozzle. A bleed valve is positioned between the air compressor and the fuel thank thereby to increase or decrease the air pressure within the fuel tank. By increasing and decreasing the air pressure within the tank, the burner can produce heat over a range of operation.

Abstract: A fuel-fired water heater is provided with a flame spreader-type fuel burner assembly that reduces the operating NOx emissions of the water heater. The assembly includes a radial port gas burner coaxially disposed in a facing relationship with a generally inverted dish-shaped flame spreader which intercepts and is impinged on its concave side by the burner flames. In various disclosed embodiments of the flame spreader, during operation of the burner the burner flames pass through spaced series of openings extending through the flame spreader body inwardly of its outer edge periphery instead of being deflected horizontally outwardly past such periphery before passing upwardly beyond the flame spreader. The passage of the previously generated burner flames through these various openings serves to materially reduce the burner NOx emissions compared to a burner having an associated flame spreader with a conventional imperforate construction.

Abstract: A low emission combustion system for use in a fuel-fired apparatus includes a fuel-fired burner (30) operative for generating a flame extending substantially axially outwardly from the outlet of the burner, a heat transfer tube (40) opposed to the outlet of the burner whereby the flame extending from said burner passes into a flame inlet section (48) of the gas flow conduit (46) of the heat transfer tube, a radiator body (50) disposed within the flame inlet section of the gas flow conduit of the heat transfer tube, and a catalytic converter (60) for oxidizing carbon monoxide to carbon dioxide. The radiator body (50) has a thermal mass sufficient to reduce peak flame temperatures in the flame inlet section to less than 2800 F. The catalytic converter is disposed within the gas flow conduit at a location downstream of the radiator body.

Abstract: A gas burner produces a homogeneous mixture of gas and air in a short mixing zone by creating turbulence to promote thorough mixing. The burner includes a burner housing supporting a gas distribution tube and an air blower, the distribution tube emitting jets of gas in a radial direction and supporting a baffle plate having a plurality of openings. Air from the blower impinges on the jets of gas to form streams of gas and air that pass through the openings in the baffle plate. A diffuser ring is disposed downstream from the baffle plate and extends radially inward to form a flow constriction. The streams of gas and air contact the diffuser ring and undergo turbulence and the resulting mixture of gas and air passes through the diffuser ring and expands within the interior of a perforated combustion head. The mixture passes through the perforations and when ignited obtains combustion of nearly 100% of the gas and produces a very even flame profile.

Abstract: High dynamic pressure oscillations in hydrocarbon-fueled combustors typically occur when the transport time of the fuel to the flame front is at some fraction of the acoustic period. These oscillations are reduced to acceptably lower levels by restructuring or repositioning the flame front in the combustor to increase the transport time. A pilot flame front located upstream of the oscillating flame and pulsed at a selected frequency and duration effectively restructures and repositions the oscillating flame in the combustor to alter the oscillation-causing transport time.

Abstract: The fuel in the fuel rich inner cone of the flame is catalyzed by a partial oxidation catalyst into carbon monoxide and hydrogen which have a lower peak flame temperature thereby reducing thermal NO.sub.x. The insert is heated and radiates heat with a further reduction of peak flame temperature.

Abstract: A fuel-fired air heating furnace is provided with NOx reduction apparatus associated with a plurality of combustor tubes forming a portion of the furnace heat exchanger section. Inshot-type fuel burners are spaced apart from and face the open inlet ends of horizontal combustion sections of the combustor tubes. The NOx reduction apparatus includes a plurality of NOx reduction members formed from a metal rod material, and a mounting plate having a row of spaced apart pairs of mounting holes therein. Each NOx reduction member has an elongated, generally U-shaped configuration, with a closed inner end, an open outer end, and a spaced pair of corrugated leg portions extending between such inner and outer ends.

Abstract: A high intensity and high efficiency radiant gas burner (10) has a housing (8), a gas inlet (11) for receiving a combustible gas, a gas injection plate (13) for distributing the gas, a gas distribution chamber (16) for permitting the gas to expand, a porous ceramic layer (17) for receiving the gas from the gas distribution chamber (16), and a plurality of elongated flame support rods (23) situated over and spaced from a burner surface (17b) of the porous ceramic layer (17). When the gas is ignited, the flame transfers energy via convective heat transfer to the rods (23). When the rods (23) heat up, they radiate energy back towards the burner surface (17b) and also outwardly away from the burner surface (17b) so that radiation intensity and efficiency are optimized. A rod adjustment mechanism (84) may be disposed on the burner (10) for moving the rods (23) to thereby optimize radiation intensity and efficiency.

Abstract: A gas burner is described, provided with a connection for supplying a mixture of combustible gas and combustion air, and a burner pack comprising a plurality of stacks of at least one metal plate which is deformed transversely to its flat plane, and at least one flat metal plate on both sides of each deformed plate, which stacks of burner plates are separated by a solid filler and said plates with their main surfaces being parallel to the flow direction of the gas/air mixture, wherein per stack the flow direction of the gas/air mixture from the flow channels bounded by said deformed plate and said flat plates is the same.According to the invention, each stack of burner plates comprises two or more deformed plates.

Abstract: A baffle is located in a recessed location relative to the inlet of a heat exchanger tube and facing the burner. The baffle is made of high temperature ceramic foam and has a plurality of flutes which define the flow path. In passing through the baffle, the velocity of the flame pattern is increased which reduces the noise level. The baffle also reduces NO.sub.x as a result of heat transfer to the baffle.

Abstract: A mixing/quenching device is in the form of a stack of perforate metal sheets secured together with the perforations aligned to define continuous flow paths. The interfaces of the laminations in the flow path provides turbulence and the thermal mass of the device provides heat transfer such that thermal NO.sub.x is reduced.

Abstract: A spiral, perforate ceramic baffle is placed into a heat exchanger in facing relationship with the burner and in an overhung relationship to the heat exchanger. A primary air/fuel mixture in the flame from the burner passes into the baffle drawing secondary air into the overhung portion of the baffle cooling the burner flame. Turbulence of the burner flame pattern in the baffle changes heat exchanger harmonic resonance and reduces burner noise.

Abstract: A fuel fired, forced air, draft induced heating furnace is provided with NOx reduction apparatus associated with a plurality of combustor tubes forming a portion of its heat exchanger structure. In-shot type fuel burners are spaced apart from and face the open inlet ends of horizontal combustion sections of the combustor tubes. The NOx reduction apparatus includes a plurality of insert members received in inlet end portions of the combustor tubes. Each insert member is formed from a single sheet of metal mesh material and has a hollow, open-ended body portion coaxially received in its associated combustor tube and spaced laterally inwardly from its interior side surface, and a circumferentially spaced plurality of integral, laterally outwardly projecting support rib portions that slidably engage the interior side surface of the combustor tube, thereby automatically maintaining the insert member in a coaxial relationship with the combustor tube regardless of the positional orientation of the tube.

Abstract: A gas-fired infrared radiator comprising a closed housing which includes a combustion chamber, with a side of the radiator that is to be directed towards an object being a radiation plate which forms a boundary of the combustion chamber, and comprising at least one burner, wherein the or each burner is a high-speed burner adapted for combustion in two combustion stages, with the second combustion stage taking place in the combustion chamber, the or each high-speed burner is arranged in such a manner that a flame formed by the or each high-speed burner is directed at the radiation plate, and gas guiding means are provided for partly recirculating flue gas which has been passed along the radiation plate, to the first or second combustion stage.

Abstract: In a torch which uses oxygen and a fuel gas, a first flashback assembly and a second flashback assembly are formed as an integral part of the torch handle. Each flashback assembly includes three primary components as follows: a porous metal flashback arrestor, a retainer and a check valve subassembly. In the preferred embodiment, the porous metal flashback arrestor is mounted on one end of the retainer and the check valve subassembly is held in the other end. In an alternative embodiment, the check valve subassembly is positioned on the interior of the porous metal flashback arrestor. Each flashback assembly can be easily removed and replaced during periodic reconditioning of the torch. The flashback assemblies utilize a parts-in-place principle which precludes operation of the torch unless both flashback assemblies are installed in the torch handle. The porous metal flashback arrestor is designed to reduce the possibility of migration of a flashback upstream from the torch.

Abstract: A submergible torch for removing nitrate and/or nitrite ions from a waste solution containing nitrate and/or nitrite ions comprises: a torch tip, a fuel delivery mechanism, a fuel flow control mechanism, a catalyst, and a combustion chamber. The submergible torch is ignited to form a flame within the combustion chamber of the submergible torch. The torch is submerged in a waste solution containing nitrate and/or nitrite ions in such a manner that the flame is in contact with the waste solution and the catalyst and is maintained submerged for a period of time sufficient to decompose the nitrate and/or nitrite ions present in the waste solution.

Abstract: An abatement member for inhibiting formation of oxides of nitrogen in a gas-fired furnace by controlling peak flame temperatures and residence times at the peak flame temperatures is described. The combustion system has at least one heat exchanger conduit having a flow path therethrough and at least one gas burner for burning fuel to produce a combustion flame. The abatement member has a porous refractory body portion having at least one section which is disposed transversely to the direction of flow of gases through the conduit. In one embodiment, the abatement member is a metallic screen having a serpentine shape and positioned within the fire tube. The combustion flame is directed toward and into the inlet of a fire tube and through the screen whereby the screen absorbs thermal energy from the combustion flame at a rate which limits peak flame temperatures to levels which inhibit formation of oxides of nitrogen.

Abstract: Burner fed with combustive air and combustible gas, comprising a distribution chamber (3) communicating with a combustion chamber (11), with interposition between them of a combustion grille (13). The distribution chamber is fed tangentially with air and gas and comprises a mixing turbine (15). The burner may be ignited through the periphery of the combustion chamber.

Abstract: An afterburner positionable adjacent the discharge end of a combustion chamber of a fuel-burning heater utilizes a ring portion and a nose cone portion which are constructed as a unit out of a single piece of material. The ring portion accommodates the attachment of the afterburner adjacent the discharge end of the combustion chamber, and the nose cone portion has a skirt including peripheral edge portions which are spaced from and overlap the inner edge portions of the ring portion so that the direction of movement of the flow of products of combustion through the combustion chamber is altered before the combustion products exit the chamber. The afterburner is formed from a single piece of sheet steel in steps involving a first press operation, a lancing operation, and then a second press operation.

Abstract: A fast, safe pyrogenic external torch assembly that provides pure steam for semiconductor processing in semiconductor processing furnaces includes a gas injection nozzle subassembly, a pulse heater subassembly and a compressed-air-cooled heat-exchanging jacket subassembly. The gas injection nozzle subassembly includes plural oxygen gas injection nozzles and a hydrogen gas injection nozzle that cooperate to provide a torch that is well-behaved over the practicable range of oxygen and hydrogen gas supply rates and ratios, that may be quickly ramped to any desired gas flow conditions and that is free from the possibility of unwanted explosion due to incomplete hydrogen gas consumption. The pulse heater subassembly includes one or more blackbodies and a radiant energy source that are cooperative to quickly and efficiently provide one or more hot spots at the industry safe-ignition temperature.

Abstract: A furnace includes a generally cylindrical combustion chamber that is open at one end for receiving a single port inshot target burner. The target burner includes a flame spreader for lowering the heat energy and temperature of the gas flame so as to reduce NO.sub.x emissions. The flame spreader includes a plurality of rods affixed to the target plate or disc.

Abstract: A block-like curtain of reticulated ceramic foam is spaced forwardly of the burner nozzle of an industrial burner and, when heated by the flame of the burner, oxidizes unburned CO into CO.sub.2 to reduce the emissions of CO. By virtue of the curtain reducing the CO emissions, the burner may operate with a slower, longer and lower temperature flame so as to reduce NO.sub.x emissions. The curtain may be adjusted toward and away from the burner nozzle in order to correlate the position of the curtain with the length of the flame.