Ultralow-nitrogen gas burner

Abstract

The invention relates to an ultralow-nitrogen gas burner. The ultralow-nitrogen gas burner comprises a first-stage gas header, a second-stage gas collecting ring, a furnace body, an igniter and an airflue with openings in the two ends, and the outlet of the air flue penetrates through a furnace wall of the furnace body to enter a hearth; the air flue at least comprises a central air flue, a primary air flue and a secondary air flue which are sequentially arranged from inside to outside in a sleeved mode, and the first-stage gas header and the second-stage gas collecting ring are connected with a fuel gas main pipe; the first-stage gas header is connected with a central spray gun and a plurality of first-stage gas spray guns, the first-stage gas spray guns are uniformly distributed on theperiphery of the central spray gun, and the central spray gun and the first-stage gas spray guns extend into the central air flue; the second-stage gas collecting ring is uniformly connected with a plurality of second-stage gas spray guns, and the second-stage gas spray guns extend into the secondary air flue; and the igniter is arranged in the central spray gun, and an ignition end of the igniterextends out of an outlet end of the central spray gun. According to the ultralow-nitrogen gas burner, a double-header and pipe group type supply mode is adopted, so that circumferential grading of the fuel is realized, air / gas mixing condition is improved, combustion balance is realized, and NOx generation is reduced.

Description

technical field [0001] The invention belongs to the field of burners, in particular to an ultra-low nitrogen gas burner. Background technique [0002] With the rapid development of the economy, the consumption of energy is increasing rapidly, and the pollution caused by fuel combustion is becoming more and more serious. Urban energy has begun to move towards the era of natural gas, especially the implementation of the "West-to-East Gas Transmission" project, which marks the arrival of the era of natural gas for urban gas in China. After comparing the emissions of oil, coal, and natural gas in the combustion process, it is found that the gas emissions of natural gas are much less than those of other fuels, and only the emission of NOx is on the same order of magnitude. With the rapid development of the natural gas industry, the pollution of nitrogen oxides produced after the combustion of natural gas cannot be ignored. Therefore, the development of ultra-low nitrogen gas bu...

AI Technical Summary

Problems solved by technology

The problem with flue gas recirculation is that the external flue gas recirculation takes up a lot of space and high investment, while the internal flue gas recirculation is less effective in reducing nitrogen oxide emissions

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