摘要:
There is provided a top-firing hot blast stove including a burner and a burner duct capable of stabilizing an ignition point at a desired position inside the burner duct and suppressing occurrence of blinking phenomenon so as to achieve high combustion efficiency. A top-firing hot blast stove 10 includes a checker chamber 4 and a combustion chamber 3 which includes a burner system and placed above the checker chamber 4. The burner system includes: a burner 1 provided with a fuel gas pipe 1c and combustion air pipes 1b, 1d; and a burner duct 2 communicating with a burner exit 1a of the burner 1, the burner duct 2 communicating with the combustion chamber 3 through a burner duct outlet 2b, wherein an aperture enlarged portion 2c where an aperture D1 of the burner duct 2 is enlarged is provided over a section from a middle of the burner duct 2 to the burner duct outlet 2b, so that an eddy current ED of the mixed gas MG flowing toward the combustion chamber 3 through the burner duct 2 is formed in the aperture enlarged portion 2c.
摘要:
There is provided a top-firing hot blast stove capable of enhancing combustion efficiency in burner system, supplying high-temperature combustion gas to an entire checker chamber, and suppressing damage on a refractory material on an inner wall of a burner duct. A top-firing hot blast stove 10 has a burner system including: a burner 1 for passing fuel gas or combustion air to each of three or more pipe lines in a multiple pipe line structure; and a burner duct 2. A core pipe line 1b and a central pipe line 1c include a swirling flow generating means provided for generating a swirling flow of the fuel gas or the combustion air, while an outermost pipe line 1d carries a linear flow of the fuel gas or the combustion air, so that combustion gas HG including a linear component HG" and a swirling component HG' is generated in the burner duct 2. The combustion gas HG is supplied to a combustion chamber 3 from at least one or more of the burner systems in an inflow direction which does not pass through a center position of the combustion chamber 3.
摘要:
In order to overcome the problems that earlier methods and apparatus have experienced, in particular in order to provide for a method and burner producing NOx lower than 850 mg/Nm 3 at eight percent O 2 with adjustable flame shape and with higher heat transfer, it is proposed to provide oxygen enriched fuel into a combustion atmosphere (70) of a furnace (60), comprising: - injecting a fuel stream (32, 132, 232, 332, 432, 532) into the combustion atmosphere (70); and - providing, in particular injecting, oxygen (17, 117, 217, 317, 417, 517) into the fuel stream (32, 132, 232, 332, 432, 532) during the injecting of the fuel stream (32, 132, 232, 332, 432, 532) into the combustion atmosphere (70).
摘要:
Ceramic burner for gases, especially for use in the combustion chamber (2) of a regenerative heat generator, such as a hot-blast stove (1) for a blast furnace (1), which ceramic burner is provided with a first feed duct (13) for a first combustion component, such as a combustible gas, and with a second feed duct (12) for a second combustion component, such as combustion air, the first feed duct (13) opening out into a substantially elongate outlet opening (15) and the second feed duct opening out into at least one second outlet opening (14), the latter opening(s) extending essentially parallel to and downstream of the first outlet opening, a partition (11), which continues as far as the two outlet openings (14, 15), furthermore being situated between the first feed duct (13) and the second feed duct (12), in which ceramic burner at least one of the first and second feed ducts (12, 13) is provided with means for imparting turbulence, during operation, to the combustion component emerging through the duct(s) in question, which turbulence is such that a combustible mixture of the two combustion components is formed upstream of the end of the partition (11).
摘要:
Ceramic burner for gases, especially for use in the combustion chamber (2) of a regenerative heat generator, such as a hot-blast stove (1) for a blast furnace (1), which ceramic burner is provided with a first feed duct (13) for a first combustion component, such as a combustible gas, and with a second feed duct (12) for a second combustion component, such as combustion air, the first feed duct (13) opening out into a substantially elongate outlet opening (15) and the second feed duct opening out into at least one second outlet opening (14), the latter opening(s) extending essentially parallel to and downstream of the first outlet opening, a partition (11), which continues as far as the two outlet openings (14, 15), furthermore being situated between the first feed duct (13) and the second feed duct (12), in which ceramic burner at least one of the first and second feed ducts (12, 13) is provided with means for imparting turbulence, during operation, to the combustion component emerging through the duct(s) in question, which turbulence is such that a combustible mixture of the two combustion components is formed upstream of the end of the partition (11).