Linear low-nitrogen fuel gas combustion head

Abstract

The invention discloses a linear low-nitrogen fuel gas combustion head. The linear low-nitrogen fuel gas combustion head comprises a combustion-supporting air inlet pipe (2), a fuel gas distribution chamber (3), a primary combustion head (4), a flame tube (9), a secondary annular linear nozzle (10), a fuel gas inlet pipeline (14) and the like, wherein one end of the combustion-supporting air inletpipe (2) is connected with a combustion-supporting fan or an air flue though an air duct installing flange (1) at the end part; the other end of the combustion-supporting air inlet pipe (2) is connected with the flame tube (9); the fuel gas distribution chamber (3) is located on the outer wall of the combustion-supporting air inlet pipe (2) and the flame tube (9); the fuel gas distribution chamber (3) communicates with the fuel gas inlet pipeline (14), the primary combustion head (4) and the secondary annular linear nozzle (10); the secondary annular linear nozzle (10) comprises a plurality of spraying guns and the multiple spraying guns are distributed in the circumferential direction of a port of the flame tube (9); the tube wall, located in the fuel gas distribution chamber (3), of theflame tube (9) is provided with a heat insulation layer (6). According to the linear low-nitrogen fuel gas combustion head, the fuel gas can be efficiently diffused and mixed, and the NOx generationamount is lower than 20 mg / m<3>, so that the pollution of combustion products to the atmosphere is reduced.

Description

technical field [0001] The invention relates to a combustion device, in particular to a low-nitrogen gas combustion device. Background technique [0002] The combustion methods adopted by traditional gas burners are generally three combustion methods: forced diffusion mixing, partial premixing and complete premixing. The three combustion methods have their own advantages and disadvantages. The forced diffusion mixing effect is poor, the combustion speed is slow, but there is no risk of flashback; the other two combustion methods are well mixed, the combustion speed is fast, but there is a risk of flashback. [0003] The nozzle type of the traditional gas burner is generally a multi-tube or disc-type porous type. The gas is usually injected axially, radially or tangentially along the center of the burner, and a single-stage nozzle or a two-stage nozzle is generally used. The traditional gas burner has a single nozzle structure, simple gas diffusion and mixing method, and the...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a linear low-nitrogen gas combustion head for the problems of insufficient gas diffusion and mixing and high NOx generation in traditional gas burners. The gas can be efficiently diffused and mixed, and the NOx generation is low. at 20mg / m 3 , in order to reduce the pollution of combustion products to the atmosphere

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