Annular surface cold flame ultralow-nitrogen combustor

Abstract

The invention discloses an annular surface cold flame ultralow-nitrogen combustor. The annular surface cold flame ultralow-nitrogen combustor comprises a mixed gas cylinder body for inputting air andgas, a water outlet pipe, a water inlet pipe, a water inlet tank, a water outlet tank, an outer water pipe and an inner water pipe; a mixer is connected with the mixed gas cylinder body; the mixed gascylinder body is connected with a water outlet porous plate of the water outlet tank; the water inlet pipe penetrates through the mixed gas cylinder body to communicate with a water inlet porous plate of the water inlet tank; the water outlet pipe communicates with the water outlet tank; two ends of the outer water pipe and the inner water pipe correspondingly communicate with the water inlet porous plate and the water outlet porous plate; and a plurality of porous plates sleeve the internal water pipe. The annular surface cold flame ultralow-nitrogen combustor can effectively reduce the NOxemission, can replace and transform a traditional combustor and a premixing combustor, can preferably match with a boiler through changing the diameter and the length of a combustion surface of the combustor according to the power of the boiler and the space size of a combustion chamber, and realizes stable, uniform and complete combustion of flame on the combustion surface.

Description

technical field [0001] The technology relates to a burner, in particular to an annular surface cold flame ultra-low nitrogen burner. Background technique [0002] At present, with the continuous improvement of environmental protection requirements, the emission requirements of NOx are becoming more and more stringent, and the low-nitrogen transformation of the original gas burners has been basically completed, but these burners mainly adopt air staged supply, fuel staged combustion and auxiliary flue gas external cycle, while NOx emissions are mostly controlled at 50mg / Nm 3 Above, due to the need for an external flue gas external circulation fan, the power used is increased. At the same time, in order to reduce NOx emissions, it is necessary to increase the flue gas circulation, which affects the output of the boiler and the stability of combustion. Surface metal fiber mesh premix burners are also used in low-nitrogen transformation, but the normal use of the burner is affe...

AI Technical Summary

Problems solved by technology

In the industrial field, the existing slit burner uses water-cooled tubes to cool the flame and reduce NOx emissions. However, with the increase of boiler power, the volume of the burner increases a lot, which cannot be well matched with the boiler, and cannot be used in old-fashioned boilers. The low-nitrogen modification is mainly applied to the new integrated boiler

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