Abstract: A spark ignited, gas fueled pilot assembly compromising a bracket and a metal gas tube extending through the bracket and having an outlet end. The gas tube is surrounded by a ceramic jacket which is of such a length as to extend beyond the outlet end of the gas tube by approximately 0.03? such that the gas tube outlet is recessed into the ceramic jacket. The assembly further comprises a pair of ignitor electrodes carried by the bracket and arranged and located relative to the recessed gas supply tube to ignite fuel emanating therefrom.

Abstract: A drying installation for the continuous drying of a moving web material is provided. The installation includes radiating or heating elements, burning the gas. The installation includes a gas flow circulation system configured to suction combustion products generated by the radiating or heating elements. The gas flow circulation system also includes an extraction pipe configured for the evacuation from the installation of at least part of the combustion products suctioned by the gas flow circulation system. The installation also includes a device for treating carbon monoxide and optionally nitrogen oxides, the treatment device-including an oxidation and optionally reduction catalyst and being mounted on or downstream of said extraction pipe in order to treat the carbon monoxide and optionally the nitrogen oxides contained in the combustion products. The installation includes a regulation means configured to regulate the temperature of the catalyst at a temperature greater than or equal to 130° C.

Abstract: A ceramic reflector (100) for at least one IR lamp comprises at least one elongated concave reflector body (102). Each of the at least one elongated concave reflector bodies comprises an elongated bottom section and two elongated upstanding walls. Each of the elongated concave reflector bodies is provided for containing at least one IR lamp (150) and for reflecting the IR light from the at least one IR lamp. Each elongated concave reflector body has in each cross section at both of its upstanding walls a wall height. The wall height is the vertical distance between the deepest level of the bottom section of the reflector body and the highest level of the upstanding wall. At one or at both longitudinal ends of at least one reflector body; the wall height is at both upstanding walls larger than in the middle section of the elongated concave reflector body.

Abstract: A convective hood for transverse installation in a system for continuous heat treatment of moving strip material comprises blowing nozzles for blowing hot gas against the moving strip in an arrangement transverse to the direction of movement of the strip material; and a first transverse suction zone for the suction of hot gas. The first transverse suction zone comprises a first transverse section and a second transverse section. The first transverse section and the second transverse section are provided at the same side downstream or upstream of the movement of the strip material from the blowing nozzles when the convective hood is installed in a system for continuous heat treatment of moving strip material. The second transverse section is provided along the line for movement of the continuous strip material between the first transverse section and the blowing nozzles.

Abstract: A thimble shaped burner is made of a porous foam metal material and is adapted to be mounted on the interior of a plenum chamber receiving a fuel/air mixture under pressure. The fuel/air mixture infuses into the interior of the thimble shaped burner body and exits from it through a burner port in a support structure where the fuel/air mixture that has been infused through the burner body is ignited. The burners are typically used in multiples and are mounted by means conventional fasteners passing through reinforced mounting flanges on the interior of an air fuel plenum chamber. Flame lift off is reduced or eliminated by particular configurations and dimensions of annular metal washers that are used in association with the burner bodies for mounting purposes.

Abstract: A gas-fired, powered infrared burner unit comprising a perforate distribution plate configured as a tray and a porous foam metal burner element carried in the tray, the combination overlying the open top of a plenum box and sealingly fastened to an edge flange of said box by a retainer having a surrounding flange fastened to the plenum box flange by welding, staking or other means so as to eliminate the need for a gasket. The foam metal medium is constructed of a foam metal alloy to have a pore size of 1000 micros±5%, and produce, along with the perforations in the distribution tray, a port loading of between about 850 and 1,000 BTU/in2.

Abstract: A ceramic reflector (100) for at least one IR lamp comprises at least one elongated concave reflector body (102). Each of the at least one elongated concave reflector bodies comprises an elongated bottom section and two elongated upstanding walls. Each of the elongated concave reflector bodies is provided for containing at least one IR lamp (150) and for reflecting the IR light from the at least one IR lamp. Each elongated concave reflector body has in each cross section at both of its upstanding walls a wall height. The wall height is the vertical distance between the deepest level of the bottom section of the reflector body and the highest level of the upstanding wall. At one or at both longitudinal ends of at least one reflector body; the wall height is at both upstanding walls larger than in the middle section of the elongated concave reflector body.

Abstract: Gas fired radiant emitter having a premixing chamber for preparing a premix of gas and air; a perforated ceramic plate acting as burner deck; and a pilot burner having a premix gas supply flow tube and two electrodes. The premix gas supply flow tube of the pilot burner extends from the side of the perforated ceramic plate where the premixing chamber is located, into a through hole in the perforated ceramic plate. The premix gas supply flow tube has a gas exit in the through hole in the perforated ceramic plate or at the combustion side of the perforated ceramic plate. The gas fired radiant emitter has features so that in an area of the perforated ceramic plate around where the premix gas supply flow tube extends into a through hole in the perforated ceramic plate, no premix gas flows through the perforated ceramic plate.

Abstract: A nozzlebox for blowing hot gas in the convective drying zone of equipment for the continuous drying of air-borne paper sheets comprises at least one direct impingement nozzle for ejecting a jet of hot gas perpendicular to the average plane of the paper sheet to be dried. The nozzle box comprises a plurality of inclined jet nozzles for ejecting jets of hot gas under an inclined angle with respect to the average plane of the paper sheet to be dried. At least two inclined jet nozzles are provided for which the plane comprising the vector representations of the jet directions of the at least two inclined jet nozzles does not comprise the vector representing the jet direction of a direct impingement nozzle.

Abstract: Method of recovering thermal energy from a motorized heat pump (1) comprising a step of: removal of the heat in the condenser (4), removal of the heat in the engine recuperator (11), removal of the heat in the exhaust recuperator (17), restoration of the heat removed in a heat restorer (21) that the heat transfer loop (18) passes through, the method being capable of: determining the power of the combustion in the heat engine (7), determining the refrigeration power available in the evaporator (3), modulating the speed of rotation of the heat engine (7) such that the refrigeration power is numerically superior to the combustion power.

Abstract: Gas fired radiant emitter having a premixing chamber for preparing a premix of gas and air; a perforated ceramic plate acting as burner deck; and a pilot burner having a premix gas supply flow tube and two electrodes. The premix gas supply flow tube of the pilot burner extends from the side of the perforated ceramic plate where the premixing chamber is located, into a through hole in the perforated ceramic plate. The premix gas supply flow tube has a gas exit in the through hole in the perforated ceramic plate or at the combustion side of the perforated ceramic plate. The gas fired radiant emitter has features so that in an area of the perforated ceramic plate around where the premix gas supply flow tube extends into a through hole in the perforated ceramic plate, no premix gas flows through the perforated ceramic plate.

Abstract: A control system for control of supply of electrical power from a network to various groups of impedances comprises a synchronisation system for synchronising with the cycles of an AC supply network and a programmable control unit. The programmable control unit has control tables. Each control table corresponds with a particular percentage of maximum electrical power. Each control table has a sequence of bits, the percentage of 1 values corresponds to the percentage of maximum power. The programmable control unit provides digital outputs in the form of control tables for the command of static power switches which control electrical power to the various groups of impedances. The impedances of one group are connected in star and the various groups are connected in parallel. The control system guarantees an efficient use of the electrical power, equally distributed over the three phases with a low level of harmonics.

Abstract: The present invention relates to a gas fired infrared radiation emitter comprising a burner plate (140) acting as combustion surface and a radiant screen (160) positioned at the combustion side of the perforated tiles. The radiant screen is embossed (180) proving locally different distances between the burner plate and the radiant screen. The result is a higher performance of the gas fired infrared radiation emitter.

Abstract: A drying installation (1) and method for drying of products (3). More in particular, the invention relates to a drying installation (1) and a method for drying sludge or mud, as e.g. the drying of wastewater and industrial sludge possibly contaminated with toxic or corrosive components. The dryer installation (1) comprises infrared emitters (5) which are protected and/or insulated from the evaporation products (7) exiting the drying product (3).

Abstract: A radiant burner comprises a body defining a premixing chamber and a combustion chamber. The premixing chamber is separated from the combustion chamber by at least one radiant burner plate (2) which has multiple levels of burner surface. The combustion chamber is further limited by a first radiant screen (4). The radiant burner further comprises a second radiant screen (3) in the combustion chamber. The second radiant screen is spaced from, but near and parallel to the radiant burner plate(s), such that this second radiant screen acts as an extended burner surface and also heats up said at least one radiant burner plate when in use.

Abstract: A radiant heater including a burner having an inlet for receiving an air and gas mixture and an exhaust for emitting exhaust gases generated by combustion of the air and gas mixture within the burner, an elongated radiant heating tube having an inlet for receiving the exhaust gases emitted by the burner, a gas flow control assembly for controlling the flow of gas to the burner, and a blower for controlling the flow of air to the burner. The blower comprises a two-stage blower including a motor having a low winding corresponding to a low blower speed and a high winding corresponding to a high blower speed. The gas flow control assembly comprises a two-stage regulator or two-stage valve having a low setting for delivering a low gas flow to the burner and a high setting for delivering a high gas flow to the burner.

Abstract: A radiant heating system including at least one gas burner and at least one conduit connected to the at least one burner on one end and connected to at least one exhaust tube at an opposite end for transporting hot exhaust gas. Heat is transferred via conduction to an external surface of the conduit. The heat is then radiated omnidirectionaly from the external surface of the conduit as infrared rays. A fan directs a stream of air across the external surface of the conduit to cool the conduit allowing the at least one burner to operate continuously for longer periods of time.

Abstract: A dryer for drying continuous strips of paper uses blowing and suction airflows. The temperature of the suction airflow is higher than the temperature of the blowing airflow. The dryer exchanges energy between the blowing and suction airflows.

Abstract: In a heat treatment installation a strip moves continuously past infrared radiant elements and elements for blowing air onto the strip. The installation comprises a succession of blower elements separated from each other by at least one infrared radiant element, each blower element having on each side of it a suction element near an infrared radiant element.

Abstract: A fuel enriched ignitor for a fuel gas burner appliance wherein a fuel enricher tube is provided with a coupling having a threaded insert which, by way of a metering orifice, matches the enricher tube to the particular fuel gas being used. By both two-element and three-element ignitors are disclosed. The ignitor is also illustrated in a gas supply system having a single main valve which serves both the enricher tube and the primary appliance burner.