Abstract:
A method comprises providing a combustion apparatus having an outer vessel and an inner conduit. The outer vessel has a first wall that defines an internal volume. The inner conduit is at least partially positioned within the internal volume and provides a fluid passageway that is in communication therewith. The method further comprises introducing oxygen into the internal volume in a manner such that the oxygen swirls within the internal volume and around the inner conduit. Furthermore, the method comprises introducing fuel into the internal volume, and combusting the fuel and oxygen at least partially therewithin. The combustion of the fuel and oxygen produces reaction products and the method further comprises discharging at least some of the reaction products from the internal volume via the fluid passageway of the inner conduit.
Abstract:
A staged combustion method which can provide reduced carbon monoxide generation along with reduced nitrogen oxides generation wherein the primary stage fluids and the secondary stage fluid are provided into the combustion zone in a defined momentum ratio which departs from unity.
Abstract:
A method for operating a furnace (32) comprising generating NOx with burners (13,20) at a value exceeding the equilibrium value by combustion at a distance from the flue (34) and generating NOx with burners (1,12) at a lesser value, preferably at a value below the equilibrium value, by combustion close to the flue (34).
Abstract:
Bei einer Feuerungsanlage, welche dazu ausgelegt ist, die Schadstoff-Emissionen sowohl beim Einsatz eines flüssigen als auch gasförmigen Brennstoffes zu minimieren, wird stromab einer ersten Verbrennungsstufe (1) kopfseitig einer zweiten nachgeschalteten Verbrennungsstufe (2) eine Ringkammer (12) angeordnet. Die erste Verbrennungsstufe (1) wird als Magerstufe mit einem Brenner (100) betrieben, während die zweite Verbrennungsstufe (2) als nahstöchiometrische Stufe betrieben wird. Die Wand der Ringkammer (12) weist eine Anzahl Oeffnungen (13) für die Einströmung eines Gemisches (14) aus rückgeführtem Rauchgas (4) und Brennstoff (15) auf. Die Verbrennungsluft (115) für den Brenner (100) ist ebenfalls ein Gemisch (6) aus Luft (3) und rückgeführtem Rauchgas (4). Die Heissgase aus dieser ersten Verbrennungsstufe (1) werden vor Eintritt in die zweite Verbrennungsstufe (2) moderiert, wobei in dieser zweiten Verbrennungsstufe (2) ab Ringkammer (12) eine selbstzündene Verbrennung stattfindet.
Abstract:
A gasification burner for combustion of a fuel, comprises a barrel having a front and a back, wherein exhaust gas produced by combustion exits at an outlet, a first air inlet into the barrel and a fuel inlet into the barrel, each positioned adjacent the back, wherein air at a first flow rate and fuel at a fuel flow rate are deliverable at the first air inlet and the fuel inlet, respectively, and a secondary air link operatively connected a second air inlet. The second air inlet is positioned closer to the front of the barrel than the first air inlet, and air at a second flow rate is deliverable at the second air inlet from the secondary air link and into the combustion chamber. A slag trap is operatively connected to the barrel so as to be able to receive slag generated from combustion of the fuel in the barrel, and the slag trap is closer to the back than the second air inlet. The second air inlet is offset with respect to the front from the secondary air link.
Abstract:
The invention relates to a process for melting a charge by means of oxy-fuel combustion burners in a furnace (1) that includes at least one upstream flue gas outlet (3), in which furnace, in the charge melting zone: the burners (41-44) placed close to the upstream flue gas outlet burn a liquid fuel; and at least one of the burners (51-54) placed far from the upstream flue gas outlet burns a gaseous fuel.
Abstract:
There is disclosed a burner (2) for use in domestic appliances requiring a hot gaseous stream during operation. The burner consists of a pair of concentric cylindrical tubes one substantially inside the other. The inner tube (4) is provided with a series of perforations (10) in rows around its surface and aligned axially (50) with the tube. An annular passage is defined between the inner and outer tube through which air is drawn by a fan downstream of the tubes and a gas injector (6) is disposed at an inlet end of the burner which delivers a combustible gas into the inner tube.
Abstract:
There is disclosed a burner (2) for use in domestic appliances requiring a hot gaseous stream during operation. The burner consists of a pair of concentric cylindrical tubes one substantially inside the other. The inner tube (4) is provided with a series of perforations (10) in rows around its surface and aligned axially (50) with the tube. An annular passage is defined between the inner and outer tube through which air is drawn by a fan downstream of the tubes and a gas injector (6) is disposed at an inlet end of the burner which delivers a combustible gas into the inner tube.
Abstract:
Flames (30) generated in a furnace (1), having at one end (50) a plurality of fuel conduits (21) in spaced relation to a plurality of oxidant conduits (11), to heat reaction chambers (80) extending the length of the furnace, are straightened by limiting the combined horizontally projected turbulent free-jet area defined by the oxidant conduit outlets at 30% of the average distance from said one end (50) to the opposite end (60) of the furnace to between 10% and 105% of the horizontally projected area of said one end (50). The invention has particular application to steam methane reformers and ethylene cracking furnaces.