An object of the present disclosure is to provide a pre-mixed burner capable of preventing a backfire, improving flame stability, and responding to various combustion loads. To attain the object, the present disclosure is implemented by including a flame hole member made of a foam body which is made from a plurality of metal alloys through a sintering process and in which an air hole being a space between struts configuring a framework is formed, and configured to form a flame by allowing a mixed gas of gas and air to be sprayed through the air hole, a flame hole member fixing plate configured to fixedly couple the flame hole member to a burner main body, and a distributing plate provided in front of the flame hole member and at which a plurality of distributing holes are formed so as to uniformly supply the mixed gas to the flame hole member.

A superadiabatic burner has a flame holder formed from a porous medium, a fuel inlet coupled to the flame holder, a fuel outlet coupled to the flame holder, a preheater comprising an inlet and an outlet coupled to the fuel inlet, and a radiating rod coupled to the porous medium. The porous medium comprises a first porous section and a second porous section. Methods of using the burner allow preheated air or other mixtures to be provided to the fuel inlet as part of a fuel air mixture for the burner.

The burner (100) comprises a cylindrical porous substrate (110); and an end cap (130) at a first end of the cylindrical porous substrate (110). The cylindrical porous substrate (110) is provided for flow of a premix of combustible gas and air from the outside of the cylindrical porous substrate (110) through the pores of the cylindrical porous substrate (110) to an interior cavity (140), for the combustible gas to be combusted on the inner surface of the cylindrical porous substrate (110) thereby generating hot gas. The burner has an opening (182) at the second end of the cylindrical porous substrate (110) to exit the hot flue gas out of the interior cavity (140). The cylindrical porous substrate (110) has a higher permeability section (170), located at the opening (182) at the second end. The higher permeability section (170) has a lower resistance to gas flow than other sections of the cylindrical porous substrate (110).

A burner includes a base and a combustion tray, wherein the base has an inlet pipe and two horn-shaped tubes. The horn-shaped tubes are connected to opposite sides of the inlet pipe, wherein each of the horn-shaped tubes respectively has a first section. A length of the first sections is no less than an inner diameter of the inlet pipe at where the horn-shaped tubes are connected to. The combustion tray is engaged with the base, and communicates with the horn-shaped tubes. Whereby, gas and air could be fully mixed while flowing through each of the first sections. The symmetrical horn-shaped tubes could direct the airflow to the combustion tray, where the airflow could be outputted from flame vents of the combustion tray, whereby to generate more even flame, and to enhance the heating efficiency.

The invention relates to a method for producing a molded body, having a silicon carbide support matrix and an integral carbon structure, wherein a base body on the basis of a powder mixture containing silicon carbide or silicon and carbon and of a binder is built in layers in a generative method, and wherein a pyrolysis of the base body is effected for realizing the molded body after the binder has been cured, wherein the carbon content of the carbon structure is adjusted by way of the pyrolysis of the binder and by way of the carbon content of the powder mixture or infiltration of a carbon material into the silicon carbide support matrix.

A combustion membrane for a gas burner including a fabric having two opposite fabric surfaces, which form a combustion surface exposed on the outer side and an inner surface facing towards an inner side respectively, where the fabric forms an interlacing of metal wires having warp threads and weft threads transverse to the warp threads, where the fabric has localized first areas with reduced gas permeability, alternated with localized second areas with higher gas permeability than the first areas, and both the first areas and the second areas have an extension, in at least one direction in the plane of the fabric, greater than the space occupied by at least three consecutive warp threads in the weft direction and greater than the space occupied by at least three consecutive weft threads in the warp direction.

A combustion membrane for a gas burner including a fabric having two opposite fabric surfaces, which form a combustion surface exposed on the outer side and an inner surface facing towards an inner side respectively, where the fabric forms an interlacing of metal wires having warp threads and weft threads transverse to the warp threads, and where both fabric surfaces form ribs in high relief alternating with valleys in low relief and that both the ribs and the valleys have an extension, in at least one direction in the plane of the fabric, greater than the space occupied by at least three consecutive warp threads in the weft direction and greater than the space occupied by at least three consecutive weft threads in the warp direction.

A flame holder assembly includes a flame holder element and a flame shield element. The flame holder element has a first plurality of apertures extending through the flame holder element. The flame shield element has a second plurality of apertures extending through the flame shield element. Each of the second plurality of apertures has a lateral dimension that is no greater than a flame quenching distance. The flame shield element is positioned facing the flame holder element, and the flame holder assembly is configured such that fuel is supplied to the flame holder element via the second plurality of apertures of the flame shield element.

A burner includes a porous support and a combustion tube along which is mounted the porous support. The combustion tube has one or more openings configured to pass fuel to the porous support. The combustion tube is formed by a plurality of tubular modules assembled together. The burner includes at least one distribution tube extending inside the combustion tube and configured to distribute fuel in a predetermined manner in the combustion tube.

A combustion membrane (14, 14) for a gas burner (2) forms a multilayer panel (22) including a gas-permeable diffuser layer (24) of a porous or fibrous solid material other than metal sheet, the diffuser layer (24) forming a combustion surface (25) facing an outer side (17), a support layer (26) formed by a metal sheet (32), arranged on an inner side (23) with respect to the diffuser layer (24), opposite to the combustion surface (25), and connected to the diffuser layer. The metal sheet has a pattern (27) of passage openings (28), a local deviating layer (29), bordering the support layer (26). Diverter flaps (30) bent transversely out of the support layer (26) and delimited by cutting or tearing edges (42) of the support layer metal sheet (32), form guide surfaces (31) oblique to a direction (40) orthogonal to an extension plane (41) of the multilayer panel (22).