Graded self-entrainment low-nitrogen combustor

Abstract

The invention discloses a graded self-entrainment low-nitrogen combustor. The graded self-entrainment low-nitrogen combustor comprises a shell, and a combustion-supporting air channel and a mixing channel are formed in the shell through the pouring of a poured combustor pouring material; a heat accumulator is arranged in the combustion-supporting air channel, and an included angle is formed between the edge of the inner wall of the mixing channel and the axis of the mixing channel; a mixing channel end cover is arranged at the narrow opening end of the mixing channel, and a primary fuel gas channel communicating with the mixing channel is inserted in the mixing channel end cover; the wide opening end of the mixing channel is provided with a horn opening, and the edge of the horn opening circumferentially communicates with a plurality of secondary gas branch pipelines; and an outlet of the combustion-supporting air channel is located in the tangential position of the narrow opening end of the mixing channel and communicates with the mixing channel. The energy-saving and excellent heat transfer capacity of an existing heat storage type flat flame combustor is reserved, the phenomenon of high nitrogen oxide pollutants can be effectively restrained, the effect of low nitrogen oxide emission is achieved, and the national requirement for environmental protection is met.

Description

technical field [0001] The invention relates to the technical field of burners, in particular to a staged combustion and self-entrainment low-nitrogen burner. Background technique [0002] A flat flame burner refers to a burner with a radial plane flame, consisting of a swirler and a fire channel. [0003] The air and gas entering the flat-flame burner flow forward in a swirling flow through the swirler, mix well, and then enter the trumpet-shaped fire channel to be ignited by the ignition burner and start to burn. The swirling flow at the exit of the fire channel is under the action of centrifugal force A swirling flame is formed, which spreads around to form a disc-shaped plane flame, which expands along the parapet. It can be seen that the flat flame burner not only has a uniform temperature field, but also effectively improves the uniformity of the temperature in the furnace, and prevents the phenomenon that the workpiece is damaged or cannot meet the process requiremen...

AI Technical Summary

Problems solved by technology

However, due to the increase in combustion air temperature, the flame peak temperature has increased significantly, resulting in the generation of a large number of thermal nitrogen oxide pollutants, which is not conducive to environmental protection, and gradually does not meet the national environmental protection requirements.

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