Aga Ab

Linde Aktiengesellschaft

Anders Lugnet

Tomas Ekman

Ola Ritzén

Mats Gartz

Carl-Lennart Axelsson

Mattias Ekblom

Ola Ritzen

A method for combustion in an industrial furnace having fuel and a first oxidizer to heat a material includes arranging at least one lance in a sidewall of the furnace; supplying a second oxidizer with an oxygen content of at least 85 percent by weight in the form of a jet traveling at at least sonic velocity to the interior of the furnace through the at least one lance; running the jet of the second oxidizer in the horizontal plane above the material between and essentially in parallel with two consecutive rows of the roof burners; balancing an amount of the second oxidizer supplied per time unit so that the oxygen content supplied via the second oxidizer constitutes at least 50 percent by weight of the total supplied oxygen per time unit in the furnace.

Method for carrying out combustion in an industrial furnace

Burner device () for an industrial furnace () comprising a channel () for fuel, a channel () for a first oxidant, an outlet () for flue gases, a control device () and a heat buffer (), where the first oxidant and the flue gases alternating are led through the heat buffer (). The invention is characterized in that a separate lancing device () is arranged to supply a second oxidant to the burner device ().

Method for burner and burner device

Method for combustion of a fuel uses an existing air burner (), including a first supply opening () for fuel and a second supply opening () for air, which supply openings () open out into a combustion zone (). The method is characterised in that a gaseous fuel with an LHV (Lower Heating Value) of less than 7.5 MJ/Nmis supplied through the second supply opening (), in that an oxidant including at least 85 percent by weight oxygen is also supplied to the combustion zone () through a supply device for oxidant, and in that the gaseous fuel is caused to be combusted with the oxidant in the combustion zone ().

Method for combustion of a low-grade fuel

Burner device () for an industrial furnace () comprising a channel () for fuel, a channel () for a first oxidant, an outlet () for flue gases, a control device () and a heat buffer (), where the first oxidant and the flue gases alternatingly are led through the heat buffer (). The invention is characterized in that a separate lancing device () is arranged to supply a second oxidant to the burner device ().

Method and device for combusting a solid phase fuel, where the fuel is caused, by the help of a non-pneumatic feeding element (), to be fed to an inlet opening () in a burner device (), where the burner device () includes a first inlet () for the oxidant through which an oxidant is caused to flow via a first supply conduit (). The first inlet () for oxidant is arranged in the form of a first opening arranged by the inlet opening, through which the oxidant is caused to flow out, through a burner pipe () and out through a burner orifice () to a combustion space (), so that the oxidant by ejector action causes the fuel to be conveyed through the burner pipe and out through the burner orifice (), and water vapour is added to the oxidant before the oxidant reacts with the fuel.

Method and device for combustion of solid fuel

Device for heating metal material includes an elongated DFI burner arranged to be driven with gaseous oxidant and gaseous fuel and to be displaceable and longitudinally arranged with respect to the metal material. The burner includes longitudinal tubular vessels for fuel and for oxidant, arranged in parallel to one another and relative to the surface of the metal material. Each of these vessels has an opening through which the fuel and oxidant flow out and then converge in an ignition zone outside the respective vessels, where a flame is generated. Supply devices are arranged via a regulator to keep the pressure constant throughout the respective vessel during operation. Each of the vessels has a longitudinally displaceable piston for controlling the longitudinal extension of the flame in the longitudinal direction of the vessels.

Device and method for heating a metal material

Method for homogenizing the heat distribution as well as decreasing the amount of NOin combustion products when operating an industrial furnace with at least one conventional burner using air as an oxidant. An additional oxidant including at least 50% oxygen gas is caused to stream into the furnace through a lance. The total amount of oxygen supplied is balanced against the amount of fuel being supplied through the air burner. Firstly, the combination of at least 40% of the supplied oxygen is supplied through the additional oxidant, the lance is arranged at a distance from the air burner of at least 0.3 meters, and the additional oxidant streams into the furnace through the lance with at least sonic velocity, and secondly the additional oxidant is supplied only when the air burner is operated at a certain lowest power or at a higher power.

[object Object]

A method and apparatus relating to the combustion of a fuel with an oxidant in a heating furnace, wherein the fuel and the oxidant are delivered to a burner head. In a first method step fuel and oxidant are emitted from the burner head in close proximity to each other, so that combustion essentially takes place close to and at a small distance outward of the burner head, and until a temperature is reached in the furnace space that exceeds the spontaneous combustion temperature of the fuel. In a second method step the fuel and the oxidant are instead emitted from the burner head at a mutual distance apart, so that combustion takes place at a distance from the burner head corresponding to at least the diameter of the burner head and outward of the burner head.

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Rimbo, Sweden

Anders Lugnet