Abstract: A method and a device for reliably preventing undesired flashback or excessive separation/extinction of a pulsating flame for use in pulsed combustion reactors or pulsation reactors for thermal material treatment or thermal material synthesis is disclosed. The invention makes it possible to operate pulsed combustion reactors or pulsation reactors with thermal material treatment at markedly greater amplitudes of an oscillation of a hot gas flow in the reactor, and to improve the properties of the thermally treated/thermally synthesized material, and to markedly increase the throughput rates of the reactor (reactor capacity), and thus to reduce production costs in comparison to other thermal methods/apparatus for material treatment, and hence to make the pulsed combustion reactor technology or pulsation reactor technology more competitive. According to the invention, the invention uses a swirl burner to generate a swirl-stabilized flame, an essentially conical diffuser being connected downstream of the burner.

Abstract: The invention relates to a device and a method for thermal treatment of a raw material in an oscillating hot gas flow of a pulsation reactor, comprising a burner, which is supplied with a mass flow, via at least one pipeline, for forming at least one flame, which produces the oscillating hot gas flow, wherein the flame is arranged in a combustion chamber, and wherein a reaction chamber follows the combustion chamber downstream of the combustion chamber. In order to be independent of the dimension of the device, it is proposed to provide the mass flow that is supplied to the flame with an externally impressed pulsation. The combustion chamber and/or the reaction chamber can then be varied in geometry to avoid resonances.

Abstract: An oscillating firing system for targeted adjustment/readjustment of amplitudes of oscillations of static pressure and/or hot gas velocity in an oscillating firing system for thermal treatment of materials or materials synthesis includes at least one burner, with which an oscillating (pulsating) flame is generated, and at least one combustion chamber (resonator), into which the flame is directed. Upstream of the burner outlet an oscillation volume is inserted into the supply lines leading to the burner through which oscillation volume air, fuel or fuel-air mixture can flow. Preferably, the size of the oscillation volume may be adjustable. Thus, it is possible to change the amplitude of oscillation.

Abstract: An apparatus is provided for suppressing flame/pressure pulsations in a furnace, in which a flame is surrounded by a gas shroud stream having a higher flow speed, whereby a ring vortex formation is stopped. In order for this gas shroud stream to be able to achieve smaller gas volumes, a screen is provided that surrounds the gas outlet openings and runs at a spacing around the burner, so that a flue gas recirculation area associated with the combustion chamber is separated from the outlet location of the gas shroud stream and thus the gas shroud stream itself.

Abstract: A process and apparatus are provided for suppressing flame and pressure pulsations in a furnace which has a burner for generating a flame and a combustion chamber into which the flame is directed. Usually, pressure pulsations can occur in such furnaces, which are induced and amplified by ring vortices rolling up on the outer or peripheral regions of the flame and or fuel/air stream. In order to prevent these ring vortices, it is proposed to surround the flame with an envelope of gas which has a higher flow velocity in the direction of the flame than the peripheral region of the flame or the fuel gas/air flow of the burner, whereby a boundary layer acceleration results, and the vortex formation can no longer take place. The furnace burner is provided with one or more gas discharge openings closely surrounding the burner outlet in order to create the gas envelope.