Abstract:
Method for burning fuel, wherein in order to obtain temperature T necessary for initializing the F2 operating mode, first the combustion chamber is preheated with burning products from the F1 operating mode to temperature T k and the air supplying the burner is preheated in the heat exchanger to temperature T AIR , which can range from the ambient temperature to 450°C, and maximally to 600°C. This relationship is defined by T = 1/2(T k + T AIR ), after meeting this condition the secondary fuel is supplied at the F2 operating mode. At the F2 operating mode, the fuel is supplied through one lance with a nozzle, from which a stream flows parallel to the stream of burning mixture of the air and fuel from the first burning segment and exhaust gases, mixes and burns together causing the extension of the flame, extension of the burning time, even distribution of temperatures in the combustion chamber and low emission of toxic compounds.
Abstract:
An air-fuel burner includes a heat-transfer tube, an air-fuel mixing chamber, and an air-fuel nozzle. The air-fuel nozzle is coupled to the air-fuel chamber to communicate a combustible air-fuel mixture into a combustion chamber defined between the air-fuel nozzle and the heat-transfer tube. The combustible air-fuel mixture, when ignited, establishes a flame in the combustion chamber to produce heat which is transferred through heat-transfer tube to an adjacent medium external to the heat-transfer tube.
Abstract:
In one embodiment, alternative combustion cavity layouts are provided for practicing fuel staging in a trapped vortex (TVC) combustion apparatus comprising an inlet premixer, for injecting fuel-air mixture into the inlet of the combustion apparatus and one or more vortex premixers, for injecting fuel-air mixture into the recirculating vortex within each of one or more trapped vortex cavities. A plurality of TVC cavities, may, for example, be laid out axially, radially, peripherally, internally, or in combinations of such arrangements. These layouts may be used in conjunction with a fuel staging method whereby the relative proportion of mixture introduced through the inlet and the respective vortex premixers can be varied as a function of operating conditions.
Abstract:
In one embodiment, a premixer is provided for use, e.g., with trapped vortex (TVC) combustors, that injects premixed fuel and air directly into the recirculating vortex, in a manner compatible with natural vortex flow in the cavity.
Abstract:
An oxy/coal combustion system and method include a furnace arranged and disposed to receive and combust a first solid fuel to form a combustion fluid, a convective section having one or more inlet devices, the convective section arranged and disposed to receive and combust a second fuel in the presence of the oxygen, and one or more heat exchangers arranged and disposed to exchange heat with the combustion fluid.
Abstract:
Die Erfindung betrifft ein Verfahren zur Reglung der Verbrennungsluftzufuhr an einem mit fossilen Brennstoffen befeuerten Dampferzeuger, wobei die Verbrennungsluft stufenweise in verschiedenen Verbrennungszonen zugegeben wird. Die Erfindung sieht vor, dass eine Regelung der Verbrennungsluftzufuhr in Abhängigkeit des NOx- und/oder CO-Gehaltes im Rauchgas derart erfolgt, dass zunächst eine Variation der Luftzufuhr zwischen den verschiedenen Verbrennungszonen bei etwa konstanter Luftmenge vorgenommen wird. Dieser Regelung ist eine äußere Regelung der Gesamtluftmenge aufgeschaltet.
Abstract:
A fuel injector (10) for use in a furnace is provided. The fuel injector (10) is used to deliver pulverized fuel to a combustion chamber of a furnace. The structure of the fuel injector (10) facilitates efficient combustion while stabilizing the combustion flame. As a result, a minimal amount of NO X and other undesirable byproducts are released into the atmosphere.
Abstract translation:提供一种用于炉中的燃料喷射器(10)。 燃料喷射器(10)用于将粉碎的燃料输送到炉的燃烧室。 燃料喷射器(10)的结构有助于在稳定燃烧火焰的同时有效地燃烧。 结果,最少量的NO x X和其它不希望的副产物被释放到大气中。
Abstract:
A method for increasing the nitrogen oxide emissions by either removing or modifying fuel rich nitrogen oxide (NOx) reduction processes thereby improving combustion efficiencies especially with low volatile low sulfur coals, and remove unburned carbon, reduce sulfur dioxide and reducing carbon dioxide emissions, while using post-primary combustion urea or ammonia injection with or without a reburn fuel NOx reducing process to restore NOx to regulated emission levels. Furthermore, adding lime or limestone to the urea or ammonia solution to further reduce SO2 and to increase the concentration of the carbon free fly ash to cementitious concentrations. Furthermore, by proper number and disposition of the injectors in the post combustion zone and by further water diluting the mixture, this NOx reduction process is effective at substantially higher gas temperatures than conventional Selective Non-Catalytic NOx Reduction and with no ammonia slip. This method significantly increases the profitability of power plants.
Abstract:
Die Erfindung ist auf einen Gasbrenner zur Verbrennung von Brenngasen mit Sauerstoff gerichtet, der eine Primärgasdüse (6) und Sekundärgasdüsen (5) umfasst, die mit einer gemeinsamen zentralen Zuleitung (3) verbunden sind. Dabei sind die schräg nach unten gerichteten Nicht-Horizontalöffnungen (8) der Primärgasdüse so ausgerichtet, dass der Gasstrahl diese auf einen Punkt einer Mittellinie (10) zwischen jeweils zwei Sekundärgasdüsen gerichtet ist, und die Mittellinie definiert ist als gedachte Linie, die zur Rotationsachse der Primärgasdüse parallel und mittig zwischen zwei benachbarten Sekundärgasdüsen verläuft.
Abstract:
A fuel injector (10) for use in a furnace is provided. The fuel injector (10) is used to deliver pulverized fuel to a combustion chamber of a furnace. The structure of the fuel injector (10) facilitates efficient combustion while stabilizing the combustion flame. As a result, a minimal amount of NO X and other undesirable byproducts are released into the atmosphere.