Abstract: Process and system for the operation of a fireplace or the like in which combustion products including pollutant gases and entrained particulate materials are treated to substantially reduce pollutant levels. The combustion products are passed through a confined flue passageway, such as found in a chimney stack, which extends upwardly to the exterior of the dwelling house or other structure. The flow of combustion products is interrupted in a manner to cause the products to follow a tortuous path in which entrained particulates in the combustion products are separated so that they collect in a suitable disposal zone. The combustion products then pass into an afterburner section comprising a plurality of heating elements. The temperature of the combustion products is sensed below the afterburner section and above bank of heating elements.

Abstract: An ignition device for burners in which an ignition spark is established over a nonconducting surface between a hot electrode and a grounded electrode or electrically conductor portion which enables a greater spark distance to be obtained as compared to an ignition spark which jumps across an air gap between two conducting electrodes. An additional feature of the present invention is the provision of a high limit control positioned proximal the burner such that flame resulting from heater inlet blockage will flash upstream into the vicinity of the high limit control to control operation of the burner.

Abstract: The device for collecting solar energy and transferring it to a reception body to be heated includes a plurality of parallel profiled elements and a closure mechanism. The profiled elements are spaced apart and superposed in order to form a curtain having an outer face suitable for being exposed to solar radiation and an inner face suitable for being located on the reception body side. The profiled elements have two reflecting faces and a shape such that when the inner face is vertical, the profiled elements slope downwardly from the inner face to the outer face. The profiled elements define a plurality of air channels directed upwards from the outer face to the inner face when the inner face is vertical. The profiled elements and the two reflecting faces thereof are formed of an insulating material so as not to conduct heat from the outer face to the inner face.

Abstract: An efficient convection oven is described. The oven utilizes a single inlet centrifugal induced back draft fan disposed in a sidewall thereof between vertical burners and combustion chambers to constantly mix products of combustion from the combustion chambers with air from within the oven cavity and recirculate the same. The fan design of the instant invention permits air changes within the oven cavity in the range of 85 to 100 per minute and the vertical burner fan combustion chamber combination permits a dramatic increase in the rack space within the oven cavity for a given oven exterior envelope.

Abstract: In a mixing and flame stabilization appliance in a combustion chamber with premixed combustion, a gaseous and/or liquid fuel is introduced into the combustion air. The combustion air is guided via a plurality of vortex generators (9) arranged adjacent to one another over the width or the periphery of the combustion chamber duct (20) through which flow takes place. Fuel is introduced into the duct (20) in the immediate region of the vortex generators (9). A vortex generator (9) has three surfaces around which flow can take place freely, which surfaces extend in the flow direction, one forming the top surface (10) and the two others forming the side surfaces. The side surfaces enclose between them a V-angle (a) varying in the flow direction and the top surface (10) is disposed at an angle of incidence to the duct wall (21 ) which varies in the flow direction.

Abstract: The invention describes a heating device (1) for solid fuels (2) with a heating element (3) which comprises a combustion chamber (6) and adjacent thereto a flue gas conduit. Downstream of the combustion chamber (6) a suction device (30) for the flue gases (29) is arranged within the path of the flue gas conduit (39). A heat exchange unit (34, 78, 85) is arranged at least in the region of one of the two side walls (35, 36) and/or the rear wall of the heating element (3), whereby this unit is arranged at a distance from the side wall (35, 36) and/or the rear wall of the heating element (3) facing towards it. An admission opening (49) of the heat exchange unit (34, 78, 85) is connected to the interior (33) of the combustion chamber (6) by a discharge channel (32).

Abstract: A compact outdoor cooking unit having a cooking mode and a transport and storage mode. The outdoor cooking unit has a foldable stove. In the cooking mode, the stove is in the extended state. A base plate of a firebox has a hook flange and the foldable stove has a releasable locking flange along the lower end of an end wall thereof. The locking flange of the stove is releasably secured to the hook flange of the base plate when the foldable stove is in an extended state for the cooking mode. The outdoor cooking unit also includes a base, a pan, and a griddle. In the transport and storage mode, the pan is seated on the base within the upstanding walls of the base. In the transport and storage state, a griddle seats on the pan with the depending walls of the griddle surrounding the pan. The base, the pan, and the griddle, respectively, have vertically aligned handle hooks.

Abstract: Simmer performance in gas ranges is improved by providing a burner grate with a flame impingement ring centered over the gas burner. The burner grate includes a base and a plurality of fingers attached to the base. The flame impingement ring is attached to all or some of the fingers. The flame impingement ring is sized so that simmer flames from the gas burner will impinge thereon. Thus, the flames are directed away from direct impingement on the cooking utensil, and some heat from the flames is absorbed by the grate. The flame impingement ring can have many cross-sectional configurations including curved, circular, oval or straight.

Abstract: A heat exchanger for a multi oil furnace is disclosed wherein the external cabinet shell houses a central ventilation chamber divided into inlet and outlet sides by a generally vertical barrier. Combustion gases flow from the burner chamber into an upper bank of conduits and a lower bank of conduits, all of which pass horizontally through the ventilation chamber. Headers operably coupling the burner chamber, the upper and lower banks of conduits and a discharge opening define a flow path for the combustion gases created by the ignition of the used oil within the burner chamber. By positioning the burner chamber vertically between the upper and lower banks of conduits, the ambient ventilation air must pass over the burner chamber and the upper and lower banks of conduits twice while passing through the ventilation chamber, thereby providing a 360 degree loop of heat exchange.

Abstract: A connecting structure of a blast furnace hot stove of the type in which a heat accumulation chamber dome and a combustion chamber dome are directly connected to each other through a dome connecting pipe which does not have any expansion joint. The ratio (RD/TD) of the diameter (RD) of the dome connecting pipe to the diameter (TD) of the heat accumulation chamber dome approximately meets the condition wherein 0.24.ltoreq.(RD/TD).ltoreq.0.60, while the ratio (RD/ND) of the diameter (RD) of the dome connecting pipe to the diameter (ND) of the combustion chamber dome approximately meets the condition wherein 0.44.ltoreq.(RD/ND).ltoreq.0.80. The connecting structure may have a reinforcement ring provided on straight barrel portions immediately under the heat accumulation chamber dome and the combustion chamber dome, and a connecting beam may be fixed at one end to one of the reinforcement rings and engage at its other end with the other of the reinforcement rings for limited sliding motion.

Abstract: A pocket lighter in which the spark wheel which may produce sparks on rotating in a first direction and rubbing on the pyrophoric stone, apart from being rotatable, is movable between a first position in which it is blocked from rotating in the first direction, and a second position in which it may rotate in said first direction, producing sparks directed towards the valve. The wheel is urged towards said first position when being actuated to rotate in said first direction and to pass to said second position, said wheel should first be rotated in a direction opposite to said first direction. Preferably the positions of the spark wheel are associated with the positions of the end stubs of the shaft thereof in some housings.

Abstract: This invention aims to attain an industrial furnace which ensures uninterrupted operation of itself and protects accessorial devices thereof including a rotary regenerative burner against otherwise possible damage when the rotary regenerative burner suffers from a mechanical trouble, and possess high responsivity and high accuracy. This industrial furnace has an oxidizing agent passage (12) communicating with-an oxidizing agent duct (33a) of a rotary regenerative burner (30), an exhaust gas passage (13) communicating with an exhaust gas duct (33b), a bypass (15) allowing intercommunication between the oxidizing agent passage (12) and the exhaust gas passage (13), and cut-off valves (16, 17) provided respectively in the bypass (15) and the exhaust gas passage (13), whereby the cut-off valve (16) on the bypass (15) side and the cut-off valve (17) on the exhaust gas passage (13) is controlled in response to a signal from burner.

Abstract: A multi oil furnace is disclosed wherein the front door is sealable against the burner chamber and against a lip extending around the circumference of a front header formed in the cabinet shell to operatively interconnect an upper bank of heat exchanger conduits with a lower bank of heat exchanger conduits. The exhaust gases flow from the burner chamber into the upper bank of conduits to the front header where the exhaust gases must flow around the burner chamber to the lower bank of heat exchanger conduits. The lip extending around the periphery of the front header is recessed below the lower bank of conduits to permit an accumulation of ash precipitated from the exhaust gases. The front door carries longitudinally offset sealing surfaces to seal against both the burner chamber and the header lip. Both the upper and lower banks of conduits, the burner chamber and the front header are accessible through the opening corresponding to the front door when moved to its opened position.

Abstract: Stoves fueled by biomass pellets are provided with a grate assembly that supports the pellets for combustion and directs combustion gas into the fire. The grate assembly includes a passive grate of equally or unequally spaced rods. The design of the rods serves to prevent the ash and clinkers from accumulating on the grate in amounts that could reduce the flow of combustion gas into the fire. In one embodiment, the rods define a surface that serves to distribute unburned fuel pellets from a location where they are deposited from a fuel feed conduit.

Abstract: An atmospheric gas burner produces improved turndown by separating a small number of the burner ports for simmer service. The burner has an internal baffle which includes a cup section having four outwardly-extending channels. Each one of the channels aligns with a separate one of the ports. The burner also includes a first fuel nozzle arranged to provide fuel to all of the ports in conventional fashion and a second fuel nozzle which provides fuel to the four simmer ports only. The second fuel nozzle has an injection orifice with a smaller cross-sectional area than the injection orifice of the first fuel nozzle. Preferably, the second orifice is sized to provide the same input rate at a maximum pressure that the first orifice does at a minimum pressure. By using a small number of ports for simmer service, the gas velocity through these ports is increased and improved turndown is achieved. In another embodiment, the baffle divides each port into upper lower sections, instead of separating some of the ports.

Abstract: A fuel lance for liquid and/or gaseous fuels for use in a combustion chamber includes a liquid fuel pipe extending along a lance center line and defining a liquid fuel passage, a gas pipe surrounding the liquid fuel pipe and forming therebetween a gas passage, and a lance outer shell surrounding the gas pipe and forming an air passage around the gas pipe for cooling air and atomizer air. At least one air/fuel nozzle is provided in a peripheral side of the lance outer shell at a downstream end of the fuel lance for air flow out of the air passage into the combustion chamber. At least one gas nozzle is provided in the gas pipe for gas flow out of the gas passage into the air passage, the gas nozzle is positioned relative to the air/fuel nozzle so that gas from the gas nozzle flows with air from the air passage through the at least one air/fuel nozzle into the combustion chamber.

Abstract: An oven utilizing charcoal as the source of cooking heat is disclosed, the oven having a thermostatically controlled charcoal ignition means used only to ignite and then reignite the charcoal in response to any temperature drop below a predetermined lower limit.

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: An improved hood for a cooking apparatus, such as an outdoor barbecue grill. The hood includes integrally formed hinges on the sides thereof comprising a pin-in-saddle assembly. The hood also includes a stop for limiting the rearward travel of the lid with respect to the cooking surface.

Abstract: A method and apparatus for the on-site disposal of landfill gas (LFG) condensate is disclosed. Any contaminants in the condensate are incinerated in an LFG flare. The LFG condensate is first pressurized and then injected, in an atomized state, into a combustion zone of the LFG flare. The LFG condensate is pumped from a plurality of sumps to an accumulator. A pump controlled by a liquid level sensor cycles on and off in response to the level of condensate in the accumulator. The pressurized condensate is delivered to a nozzle via a conduit system. The pressurized condensate is atomized by the nozzle and the resulting mist is directed into the combustion zone where it is vaporized. Any contaminants in the condensate are incinerated along with similar contaminants in the LFG.