摘要:
A burner, such as for a secondary combustion chamber of a gas turbine with sequential combustion having first and second combustion chambers, includes an injection device for introducing at least one gaseous fuel into the burner. The injection device has at least one body which is arranged in the burner with at least one nozzle for introducing the gaseous fuel into the burner. The body is configured as a streamlined body which has a streamlined cross-sectional profile and which extends with a longitudinal direction perpendicularly or at an inclination to a main flow direction prevailing in the burner. The at least one nozzle has its outlet orifice at or in a trailing edge of the streamlined body. The body has two lateral surfaces substantially parallel to the main flow direction. At least one vortex generator is located on at least one lateral surface upstream of the at least one nozzle.
摘要:
Radiant fired heaters used with reactors are described. The apparatus includes at least two sets of radiant fired heaters, the first set being at a second height less than the first height. Each set of radiant fired heaters comprises at least one radiant fired heater. Each radiant fired heater has at least one process coil disposed within the heater, burners, and a flue gas outlet. There is at least one inlet manifold having an inlet and multiple outlets, with each outlet of the inlet manifold in fluid communication with one process coil inlet. There is an outlet manifold having multiple inlets and an outlet, with the multiple inlets in fluid communication with the process coil outlets. A method of selecting a reforming apparatus arrangement is also described.
摘要:
A furnace for performing an endothermic process, comprising tubes containing a catalyst for converting a gaseous feed, wherein tubes are positioned in rows inside the furnace, wherein burners are mounted between the tubes and between the tubes and the furnace walls parallel to the tubes rows, and wherein the burners rows and the tubes rows are ended by end walls and are divided into sections with, on each row of tubes, the distance from a wall end tube to the end wall being T2W, the distance between two adjacent inner tubes in a section being T2T, and the distance between two symmetry end tubes of two adjacent sections being T2S, wherein the tubes in the rows are arranged in such a way that the ratios T2T/T2W and T2T/T2S are greater than 0.5 and smaller than 2 thus limiting the differences in the heat transfer to the outer tubes (wall end tubes and symmetry end tubes) with respect to the inner tubes and reducing the temperature difference between outer tubes and inner tubes.
摘要:
L'invention concerne un four et un procédé de combustion pour la fusion de verre selon lequel un premier combustible et un second combustible de même nature ou de natures différentes, sont introduits dans un laboratoire de fusion constitué par une paroi avant, une paroi arrière, des parois latérales et une voûte disposées au-dessus d'un bassin pour recevoir le verre à fondre et contenir le bain de verre fondu, selon lequel on introduit le premier combustible par au moins un brûleur (1) disposé sur une première paroi et injecte le second combustible par au moins un injecteur (4) sur une seconde paroi différente de la première paroi, prévoit l'introduction d'une veine d'air de combustion pour la combustion des premier et second combustibles de façon que le brûleur soit situé à un endroit près de ou dans la veine d'air de combustion et positionne l'injecteur sur la seconde paroi à une distance du brûleur suffisante, dans une zone où le second combustible se mélange avec les fumées chaudes recirculant dans le laboratoire de la combustion du premier combustible, pour qu'il se dilue dans ces fumées, avant de s'enflammer dans le laboratoire au contact de l'air de combustion non consommé par la combustion du premier combustible, avec transfert de la chaleur produite vers le verre à fondre, tout en réduisant la production de NOx.
摘要:
A furnace for performing an endothermic process comprising tubes containing a catalyst for converting a gaseous feed, wherein tubes are positioned in rows inside the furnace, wherein burners are mounted between the tubes and between the tubes and the furnace walls parallel to the tubes row and wherein the burners rows and the tubes rows are ended by end walls and are divided into sections with the distance from the end burner to the end wall being B2W, the distance between two adjacent burners in the section being B2B, and half the distance in-between two sections being B2S, wherein the burners in the rows are arranged in such a way that the ratios B2B/B2W and B2B/B2S are greater than 1.3 thus limiting the occurrence of the flame merging phenomenon and reducing significantly the quadratic mean of the tube temperature profile.
摘要:
A furnace for reheating metallurgical products comprising longitudinal walls provided with lateral burners (A1, B1,... N1; A2, B2,... N2), the burners being arranged in successive rows, and transverse end walls, and provided with an inlet and an outlet for the products, the furnace comprising, at the inlet, a recovery area (R) followed immediately, in the direction of travel of the products, by a preheating area, then successive heating areas, a smoke discharge channel (5) being provided immediately upstream from the furnace inlet and the recovery area being traversed by the smoke discharged in this way, flowing in the opposite direction to the movement of the products, each product being disposed in such a way as to extend in a direction transverse to the direction of travel; the furnace is provided, in the preheating area, on each longitudinal wall, with lateral burners (A1, B1, A2, B2) with flame modulation, capable of being controlled to produce a short flame or a long flame, in such a way as to generate a preferential flow (4) of the smoke in the recovery area in order to establish, from the recovery step, any desired temperature profile for the product, in particular a sloping profile, for which the temperature difference is maintained or increased in order to obtain the desired profile by combining modulation of the flame length and modulation of the ignition time of the burners in the heating areas.