Industrial furnace with high-temperature low-oxygen air burner

Abstract

The present invention relates to an industrial furnace with high-temp. low-oxygen air burner, which is characterized by that the two ends of furnace cavity are respectively equipped with a high-temp.low-oxygen air burner. Said burner is formed from combustion chamber, combustion chamber end cover which is set at end hole of combustion chamber, possesses a circular through hole in its centre and is formed into a ring channel at end portion of the combustion chamber and cover plate positioned on the end cover of combustion chamber. Said burner can make oxygen being in high-temp. air obtain dilution by means of returned fume and convert it into low-oxygen air, and make the fuel combust under the condition of low-oxygen air, and its oxygen concentration is less than 15%. It not only effectively reduce NOx discharge, but also its discharge temp. only is 150-200 deg.C. so as to attain the goal of saving energy and protecting environment.

Description

technical field [0001] The invention belongs to a high-temperature and low-oxygen combustion technology and equipment, in particular to an industrial furnace with a high-temperature and low-oxygen air burner. Background technique [0002] Due to its excellent energy-saving and environmental protection effects, high-temperature low-oxygen combustion technology is the development direction of industrial furnaces all over the world. However, most of the existing industrial furnaces or various fuel oil and gas heating furnaces designed and manufactured by my country's metallurgical system did not use low-oxygen combustion technology, but directly contacted high-temperature and high-oxygen-concentrated air with fuel to ignite and burn , resulting in NO x The emission is high, the loss of smoke exhaust is large, and the energy utilization rate is low. For example, the melting glass furnace used in the prior art is exactly one of them, and its structure generally consists of a fur...

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Problems solved by technology

However, most of the existing industrial furnaces or various fuel oil and gas heating furnaces designed and manufactured by my country's metallurgical system did not use low-oxygen combustion technology, but directly contacted high-temperature and high-oxygen-concentrated air with fuel to ignite and burn , resulting in NO x The emission is high, the loss of smoke exhaust is large, and the energy utilization rate is low

For example, the melting glass furnace used in the prior art is exactly one of them, and its structure generally consists of a furnace, fuel (coal-water slurry or gas fuel) spray gun, regenerative heat exchanger, blower, induced draft fan and four-way reversing valve and other components, the fuel is directly ignited and burned after being injected into the furnace, so it is easy to cause a large loss of smoke exhaust, and the NO x High emissions, do not take advantage of energy saving and environmental protection requirements

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