Abstract:
Le procédé selon l'invention comprend un brûleur à prémélange constitué d'un ensemble de buses (2) de prémélange disposées circulairement selon un diamètre DB autour d'une buse centrale (4) disposé sur un axe central A au brûleur (1) et destinée à créer une flamme radiale (5) caractérisée en ce que l'ensemble des buses (2, 4) a un ratio comburant/carburant (R) compris entre 1,3 et 1,75. La flamme radiale (5) a pour mission d'assurer l'inter-allumage entre les différentes buses (2, 4) de prémélange. Une flamme annulaire est également réalisée par une combustion en prémélange afin de conserver le ratio (R) favorable à la faible production d'oxydes d'azote d'origine thermique à l'intersection de la flamme radiale et des flammes issues des buses.
Abstract:
According to the present disclosure, a flat-flame nozzle is provided for producing a flat flame in a flame chamber included in a burner assembly. The flat-flame nozzle is configured to conduct fuel from a fuel supply to an ignition zone in the flame chamber. In some illustrative embodiments, the flat-flame nozzle is also configured to conduct oxygen from an oxygen supply to the ignition zone to produce a combustible oxygen-fuel mixture in the flame chamber. In illustrative embodiments, a removable first plate-separation border frame is positioned to lie between a first lower plate and a companion first upper plate. This border frame is configured to cooperate with those plates to form in the flat-flame nozzle a fuel-discharge outlet and a fuel-transport passageway communicating with the fuel-discharge outlet.
Abstract:
A perforated flame holder and burner including a perforated flame holder provides reduced oxides of nitrogen (NOx) during operation. The perforated flame holder includes a pattern of elongated apertures extending between a proximal and a distal surface of the flame holder relative to a fuel nozzle. The perforated flame holder can provide a significantly reduced flame height while maintaining heat output from the burner.
Abstract:
A burner and method for oxidizing solid fuels wherein the burner has a lance having one or more nozzle feeds and one or more nozzle outlets concentrically surrounded by a primary oxidant passage which is concentrically surrounded by a secondary oxidant passage wherein the primary and secondary oxidant passages communicate at their proximal ends with a gas supply, the lance having a distal and proximal end and the one or more nozzle feeds is in communication with a gas supply.
Abstract:
Burner for conveyor gas propelled particulate solid fuel, said burner comprising a burner block (100) and an injector assembly (200), the injector assembly being at least partially surrounded by an injector passage (130) of the burner block, the injector assembly comprising an inner oxygen supply pipe (210) surrounding a fuel injector, which in turn surrounds an oxygen injector (230), each having a downstream end (211, 221, 231) on the side of the passage outlet, the inner oxygen supply pipe having a lateral surface onto which are mounted a set of lateral primary oxygen nozzles (212) for the injection of lateral jets of primary oxygen into the fuel injector with an injection orientation which follows a same sense of rotation around the longitudinal direction and which is directed towards the downstream end of the fuel injector, said lateral primary oxygen nozzles being positioned at a number of different distances from the downstream end (221) of the fuel injector.
Abstract:
The present invention generally relates to an apparatus and method for use in metal melting, refining and/or other processing, such as, for example, steel making in an electric arc furnace (EAF), and more particularly, to improved burner/injector panels and related methods for the introduction of various energy sources, such as, for example, chemical energy, oxygen and particulates into an EAF.
Abstract:
Die Erfindung betrifft eine System zum Umsetzen von Brennstoff und Luft zu Reformat mit einem Reformer (10), der einen Reaktionsraum (12) aufweist, einer Düse (14) zum Zuführen eines Brennstoff/Luft-Gemisches zu dem Reaktionsraum (12) und einer Brennstoffzuführung (16) zur Zuführen von Brennstoff in die Düse (14). Erfindungsgemäss ist vorgesehen, dass die Düse (14) eine Venturidüse mit einem Lufteintrittsbereich (18) und einem sich bezüglich des Lufteintrittsbereiches (18) stromabwärts erstreckenden Diffusorbereich (20) ist.
Abstract:
A burner assembly (20) for a furnace or like device having a firebox defining a combustion zone (24). The burner assembly (20) includes a first annular tile (36) defining a centrally located path for a flow of combustion air and a second annular tile (38) concentric with the first annular tile. The second annular tile (38) has an internal diameter which is larger than an external diameter of said first annular tile (36), and the second annular tile (38) is positioned in surrounding relationship relative to at least a portion of said first annular tile (36) so that a ring-shaped conduit (80) is defined therebetween. The arrangement is such that combustion air flowing along said path induces a flow of flue gas through the conduit for entrainment by the flow of combustion air.
Abstract:
An apparatus and method for using staged air combustion. The apparatus includes a burner body (10) secured to a port block (42), and a fuel passageway (12) extending through the burner body (10), terminating in a fuel nozzle (22), which injects fuel into the burner throat (40). Primary air jets (20) are configured to inject primary air into a primary combustion region (24), which is normally in the burner throat (40). A dish with a dish surface (28) is connected to the burner throat (40); the dish surface (28) extending in a divergent angle with respect to a burner centerline (35). Secondary air jets (34) are connected to the air passageway (14) and extend through the port block (42). The secondary air jets (34) inject secondary air into a secondary combustion region (38), which may be at the dish surface (28) or the hot face (30) of the burner.
Abstract:
A burner apparatus comprises a conduit (40) adapted to convey preheated oxidant and having outlet and inlet ends, and a conduit adapted to convey preheated fuel and having outlet and inlet ends. The conduit (36) adapted to convey preheated fuel is substantially parallel and positioned substantially vertically above the conduit (36) adapted to convey preheated fuel. The conduit (36, 40) adapted to convey preheated oxidant and preheated fuel each are positioned within its own respective elongate cavity (10, 31) in a refractory burner block (4). Such that a substantially annular region is present between an outer surface of each conduit and its respective cavity. Each conduit inlet (46, 48) end extends through a respective plenum (37, 47) for receiving an ambient temperature fluid, the plenums (37, 47) adapted to pass the ambient temperature fluid into the respective annular regions.