Standing vortex type smoke inner circulation low-nitrogen combustor

Abstract

The invention provides a standing vortex type smoke inner circulation low-nitrogen combustor which comprises a combustor inlet pipe, a flowing speed adjusting ring, a center purging plate and a vortexcontrol section. The combustor stretches in a hearth of an industrial furnace or a gas boiler. After air led in from the combustor inlet pipe is mixed with gas fuel led in from the combustor inlet pipe, the mixed gas passes through the flowing speed adjusting ring, the flowing speed is very high, and the mixed gas impacts on an expansion section of the vortex control section and rushes to the hearth after the direction is deflected. The mixed gas flow impacts with the hearth and is then divided into two strands, one strand of the mixed gas flow is deflected to the downstream part to form a mainstream vortex, and the other strand of the mixed gas flow is deflected to the upstream part along the wall face of the hearth to form an upstream vortex. After ignition is conducted, the smoke formsthe smoke inner circulation during flowing of the mainstream vortex and the upstream vortex, the combustion temperature of the smoke is reduced, and therefore emission of nitric oxides of the combustor is reduced. The standing vortex type smoke inner circulation low-nitrogen combustor is suitable for combustors of industrial furnaces or gas boilers using gas fuel, and emission of nitric oxides can be reduced.

Description

technical field [0001] The invention relates to a vortex-type flue gas internal circulation low-nitrogen burner, in particular to a burner using gaseous fuel, suitable for industrial furnaces or gas-fired boilers using gaseous fuel, which can circulate flue gas internally and reduce nitrogen oxide emissions. Background technique [0002] At present, Beijing, the capital, is seriously affected by smog every year. In the early stage, a comprehensive transformation of Beijing's coal-fired boilers was carried out to replace coal with gas, reducing pollutant emissions from energy sources, and achieving the role of controlling air pollution. The low-nitrogen transformation of gas-fired boilers is to reduce nitrogen oxides and water vapor in the air, and it is also a key project task in the Beijing Clean Air Action Plan. At present, the gas-fired boilers in Beijing are mainly small boilers, accounting for about 88% under 10 steam tons, and the capacity accounts for about 47%. The ...

AI Technical Summary

Problems solved by technology

[0006] To sum up, for reducing the nitrogen oxide emissions of industrial furnaces or gas-fired boilers, many retrofitting technologies will increase the construction and operation costs a lot. Flue gas internal circulation is a cost-effective solution, but improving the circulation of flue gas Quantity is the technical problem to be solved,

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