Low-nitrogen combustor

Abstract

The invention provides a low-nitrogen combustor which comprises a shell. The shell is formed by coaxially connecting a fuel section and a combustion section, the outer wall of the fuel section is vertically connected with a fuel gas connecting pipe, a combustion-supporting air connecting pipe is vertically connected on the outer wall of the combustion section, and the combustion section further comprises a fuel gas channel communicating with the fuel section. The low-nitrogen combustor further comprises an ignition device and a primary fuel gas branch pipeline, the primary fuel gas branch pipeline communicates with the fuel gas channel, a primary fuel nozzle is formed in the primary fuel branch pipeline, the inner side of the combustion section is also connected with a secondary fuel gas annular gap channel and a secondary fuel gas branch pipeline, and one end of the secondary fuel gas annular gap is provided with a plurality of secondary fuel spray pipes. The structure of fuel classification and flue gas internal circulation is adopted, and the combustion-supporting air vertically collides with the air flow sprayed by the primary fuel nozzle and is ignited by a pilot burner. At anoutlet of the combustor, secondary fuel is sprayed out to be added into combustion, high-speed airflow or flame forms local negative pressure, and a low-temperature rich combustion area is formed, sothat NOx is reduced.

Description

technical field [0001] The invention belongs to the field of industrial equipment, and in particular relates to a low-nitrogen burner. Background technique [0002] With the global consumption of fossil energy and environmental problems becoming more and more significant, energy conservation and emission reduction has become an urgent problem to be faced in the process of industrialization in all countries in the world. For my country, the extensive and cost-free economic development model for more than 40 years has had a particularly huge impact on energy and the environment, and the task of energy conservation and emission reduction is arduous. Medium and low calorific value gaseous fuels widely exist in the production process of coal production, coal chemical industry, petrochemical industry, iron and steel, metallurgy, textile printing and dyeing industries, such as coke oven gas, blast furnace gas, converter gas, etc. However, the industrial application research on gas...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies and defects of the above-mentioned prior art, the purpose of the present invention is to disclose a low-nitrogen burner, which solves the complex structure of the burner in the prior art, low combustion efficiency, high local combustion temperature, NO x High technical issues of emission concentration

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