Ultra-low-NOx gas burner

Abstract

The invention relates to an ultra-low-NOx gas burner. The ultra-low-NOx gas burner comprises a central drum, a swirler, a gas gun group, a throat opening, a front panel and a shell; the swirler is arranged at a connector of the central drum, the throat opening and the shell are coaxially arranged on the periphery of the central drum, the gas gun group is composed of multiple inter gas guns, multiple middle gas guns and multiple outer gas guns, and the front panel is provided with opposite penetrating gas flow holes and outer gas gun nozzle containing holes; a central drum cavity is a center combustion-supporting air passage, an annular cavity between the central drum and the throat opening is a direct-current combustion-supporting air passage, and an annular cavity between the periphery of the throat opening and the shell is a cooling air passage; the inner gas guns and the middle gas guns are arranged in the direct-current combustion-supporting air passage, and the outer gas guns are arranged in the cooling air passage. In the working process, due to the fact that gas sprayed from the middle gas guns is transition gas, segmented configuration and staged combustion are achieved, sufficient combustion of the gas in the dispersed state can be achieved, the content of oxygen in a furnace hearth is effectively diluted, the emission amount of NOx is decreased to below 10 ppm, and CO is not generated.

Description

technical field [0001] The invention relates to the technical field of gas heating, in particular to a NO X Ultra-low NOx gas burners with emissions less than 10ppm. Background technique [0002] NO X It is an important air pollutant and an important factor that causes acid rain. Because it can form colloids with water vapor in the air to form smog, it is also one of the culprits that form PM2.5. With the strengthening of environmental protection and the deepening of energy conservation and emission reduction policies in our country, the requirements for NOx emission indicators are also increasing day by day. It has been clarified that the national standard of 100ppm can no longer be implemented, and NO X Mandatory requirements for emissions of less than 50ppm, but also put forward the goal of reducing NOx emissions from gas boilers to below 15PPM by 2017. To this end, the industry is actively exploring ways to achieve this. At present, although burners with NOx emission...

AI Technical Summary

Problems solved by technology

At present, although burners with NOx emission less than 30ppm have been put on the market in the world, and most of them are realized by post-treatment measures of flue gas recirculation, due to the large energy consumption and potential vibration caused by this method, there are potential safety hazards. It is more difficult to promote

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