Low-nitrogen combustor

Abstract

The invention relates to the field of combustors, in particular to a low-nitrogen combustor capable of reducing generation of nitrogen oxides. The low-nitrogen combustor provided by the invention comprises a combustor barrel body, a distributing channel sleeve, a pipeline sleeve, a fuel gas distributor and a guide device, wherein the fuel gas distributor comprises distributing pipelines for performing multi-stage distribution on introduced fuel gas and a plurality of fuel gas spray tubes; the distributing pipelines comprise the first distributing pipeline and the second distributing pipeline; the first distributing pipeline is in pipeline communication with a fuel gas inlet; the first distributing pipeline communicates with the second distributing pipeline through a plurality of pipelines; the first distributing pipeline communicates with the first fuel gas spray tube; and the second distributing pipeline communicates with the second fuel gas spray tube. Through a structure for separating fuel gas from air and spraying out fuel gas in a multi-stage mode, combustion efficiency is improved, so that the central temperature of a combustion furnace during combustion is greatly reduced, and generation of NOx is reduced.

Description

technical field [0001] The invention relates to the field of burners, in particular to a low-nitrogen burner capable of effectively reducing the formation of nitrogen oxides. Background technique [0002] Atmospheric pollution has become a focus of global attention, and one of the main culprits of air pollution is nitrogen oxides. Nitrogen oxides and other pollutants will produce photochemical smog pollution under certain conditions, which poses a huge threat to the human living environment, which makes low-nitrogen combustion technology a key research topic at home and abroad. [0003] Nitrogen oxides mainly come from the flue gas produced by fuel combustion. The factors that affect the formation of nitrogen oxides in flue gas can be summarized into three aspects. The first aspect is related to the characteristics of the fuel. The more nitrogen in the fuel, the easier it is to form Nitrogen oxides; the second aspect is related to the technical parameters in the combustion ...

AI Technical Summary

Problems solved by technology

[0005] However, due to the unreasonable distribution of fuel and air, the existing low-nitrogen burners often cause incomplete combustion and unstable combustion.

At the same time, since 2015, the national NOx standard for flue gas emissions from gas-fired boilers has changed from the European 200mg / m 3 down to 80mg / m 3 , even 30mg / m 3 , however, NOx emissions from existing low nitrogen burners rarely reach 30mg / m 3 around or below

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