Reducing ring rib water-cooling type surface combustion gas appliance

Abstract

The invention discloses a reducing ring rib water-cooling type surface combustion gas appliance. The gas appliance comprises reducing ring ribs, first-stage annular cooling water pipes and second-stage annular cooling water pipes, wherein the first-stage annular cooling water pipes and the second-stage annular cooling water pipes are arranged on the reducing ring ribs; a gas inlet cylinder is arranged on the outer side of the ring rib with the maximum diameter of the reducing ring ribs; an ignition gun hole/central secondary air pipeline is arranged on the inner side of the ring rib with the minimum diameter of the reducing ring ribs; a certain angle theta is formed between the multiple groups of reducing ring ribs and the axis of a combustor, so that a stepped gas inlet surface is formed, and isobaric gas inlet is formed; and the flow area of anti-backfire gas inlet micro-channels formed by the reducing ring ribs and the annular cooling water pipes is gradually reduced in the gas inlet direction, and in addition, an outlet forms a continuous stepped combustion plane. According to the gas appliance, isobaric gas inlet, uniform low-temperature low-NOx surface combustion of gas can be realized, meanwhile, backfire can be effectively prevented, and stable, efficient, clean and safe combustion of gas fuel is ensured; and meanwhile, the structure is simple, manufacturing is convenient, and the gas appliance is suitable for batch production.

Description

technical field [0001] The invention relates to the technical field of burners, in particular to a water-cooled surface combustion gas device with different diameter ring ribs. Background technique [0002] Although coal resources are still the main source of energy consumption in my country, a large amount of environmental pollutants such as nitrogen oxides and dust will be produced during the combustion of coal, and various post-processing technologies have also brought extremely high economic costs. In contrast, natural gas, as a clean energy, has the advantages of high combustion efficiency, low cost of pollutant control and less pollutant emission, which is more in line with the development requirements of "low-carbon economy". However, natural gas will still produce some air pollutants such as nitrogen oxides during the combustion process. According to their sources, they are mainly divided into thermal type, fast type and fuel type. The generation of fuel type and fas...

AI Technical Summary

Problems solved by technology

At present, the low-nitrogen combustion technologies of gas-fired boilers mainly include staged combustion, lean-burn premixing, flue gas recirculation, flameless combustion MILD, and swirling combustion. However, most low-nitrogen combustion technologies have high cost, complex structure or low-nitrogen combustion. Therefore, a gas device with high combustion efficiency, simple structure and good low-nitrogen combustion effect needs to be developed urgently

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