Turbulent-current long-flame top burning type hot blast stove combustor

Abstract

The invention discloses a top combustion stove burner with long turbulent-flame, which belongs to the iron making field in iron works. The technical proposal is that: a burner made of refractory materials is arranged at upper section of a firebox; a narrow section is positioned between a pre-mixing chamber of the firebox and the firebox; a plurality of independent coal gas spraying ports and independent air spraying ports are distributed on side wall of the pre-mixing chamber; the coal gas spray ports have certain rotating angles along the radial of the burner. The invention is characterized in that: the air spraying ports have an upward dip angle along the axial of the burner; the two kinds of spraying ports are shear the same number and are corresponded up and down. Compared with the prior art, the invention is able to enable the air and the coal gas to form turbulent flow after entering into the pre-mixing chamber and burn and mixing symmetrically, thereby ensuring most burning areconducted below the narrow section and burned up before reaching to checker bricks; besides, the invention realizes the sufficient mixing of air and coal gas and ensures the even distribution of air flow through the design angle of the spraying port, thereby enabling the concentration of the air closing up to internal wall of the firebox larger than that of CO and reducing the corrosion for stovewall by the high temperature CO.

Description

technical field [0001] The invention relates to a top-fired hot blast stove burner in the ironmaking field of a steel plant, in particular to a turbulent long-flame top-fired hot blast stove burner capable of protecting the wall of the hot blast stove, prolonging the life of the hot blast stove and increasing the temperature of the hot blast. Background technique [0002] The hot blast stove is a kind of equipment that sends hot blast to the ironmaking blast furnace. The quality of this equipment is directly related to the cost of ironmaking. For example, if the blast temperature increases, it can save coke and increase the output of molten iron; if the combustion air flow is evenly distributed, the hot blast stove can also be extended. Long service life, increase the benefit of ironworks. The working principle of the hot blast stove is to burn blast furnace gas (or coke oven gas) through the hot blast stove burner to generate a large amount of high-temperature flue gas. The...

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Problems solved by technology

However, there are still big deficiencies in the above schemes in practice, for example: how to organize the combustion flame reasonably for different furnace diameters, how to make the high-temperature flue gas flow evenly distributed, how to protect the inner wall of the combustion chamber from being eroded by high-temperature CO, and how to make the arch The top has the smallest temperature difference during the air supply and the furnace firing, so that the life of the hot blast stove is longer, etc.

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