Pellet low-nitrogen central burner and gas supply structure thereof

Abstract

The invention belongs to the technical field of rotary kiln burners and accessories thereof, and particularly relates to a pellet low-nitrogen central burner and a gas supply structure thereof. The pellet low-nitrogen central burner comprises a burner and a guide duct group connected with the burner, wherein the burner consists of a plurality of barrel structures which are sleeved coaxially, including an axial flow wind barrel, a rotational flow wind barrel, a coal wind barrel and a central barrel in sequence; and a guide duct assembly consists of a plurality of circular pipes which are sleeved coaxially, including an axial flow wind pipe, a rotational flow wind pipe, a coal wind pipe and a central wind pipe. The gas supply structure comprises a protective structure arranged on the outer side of the pellet low-nitrogen central burner, a gas guide pipe group arranged on the back side of the pellet low-nitrogen central burner, and a gas supply pipe group. According to the pellet low-nitrogen central burner disclosed by the invention, the shape of burning flame is regular and complete by means of large speed difference, strong rotational flow and central wind flame stabilizing effect;the flame is stable without fluctuation; and the phenomenon of kiln lining sweeping is avoided.

Description

technical field [0001] The invention belongs to the technical field of a rotary kiln burner and its accessory structure, and in particular relates to a pellet low-nitrogen central burner and its gas supply structure. Background technique [0002] The pellet low-nitrogen central burner for rotary kiln has developed from the single-channel pellet central burner in the early 1970s to the double-channel, three-channel pulverized coal burner, and later the four-channel burner. development, but its basic structure has been stuck in the old style, and there are certain limitations, including poor adaptability to coal quality, poor flame adjustment performance, few adjustment methods, insufficient combustion, etc. The existence of the above problems leads to the inability of the burner performance. To achieve the best, the content of nitrogen oxides produced after combustion is high, causing serious environmental pollution, and as modern production has stricter requirements on produ...

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Problems solved by technology

[0002] The pellet low-nitrogen central burner for rotary kiln has developed from the single-channel pellet central burner in the early 1970s to the double-channel, three-channel pulverized coal burner, and later the four-channel burner. development, but its basic structure has been stuck in the old style, and there are certain limitations, including poor adaptability to coal quality, poor flame adjustment performance, few adjustment methods, insufficient combustion, etc. The e

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