Furnace self-preheating oxygen-enriched burner with temperature-gathering type oxygen-enriched nozzle

Abstract

The self-preheating oxygen-enriched burner of the temperature-gathering furnace with oxygen-enriched nozzles includes burners burning gaseous or / and liquid fuels, as well as tubular oxygen-enriched preheaters surrounding the burners in the furnace and connected to On the tubular oxygen-enriched preheater, the small-diffusion-angle oxygen-enriched nozzles are symmetrically distributed around the burner. The combustion-supporting air duct in the burner gradually becomes smaller from the middle to the air outlet, and multiple swirls are installed inside the smaller area. plate, characterized in that: the swirl plate can make the combustion-supporting air entering from the burner swirl into the injected fuel flow at an angle of 10 degrees to 45 degrees, and the fuel nozzle sprays a fuel flow with a small diffusion angle on the front face of the burner Oxygen-lean combustion, and then through the oxygen-enriched nozzle in the furnace, the oxygen-enriched gas jet is sent into the combustion flame with oxygen-enriched combustion to improve the efficiency of heat radiation.

Description

technical field [0001] The invention relates to a self-preheating oxygen-enriched burner for a temperature-gathering type combustion furnace with an oxygen-enriched nozzle, which is suitable for all kinds of industrial boilers, heating furnaces, kilns, furnaces, incinerators, etc. of fuel and gas, and belongs to the comprehensive energy-saving and emission-reduction technology field and the field of combustion science and technology. Background technique [0002] With the development of industrial and agricultural deep-processing industries, our living environment is getting worse and worse, so the pressure of low-carbon economy and low-carbon life is becoming greater and greater; various industrial boilers in modern industry, Heating furnaces, kilns, furnaces, incinerators, etc. are the largest emitters of carbon dioxide and other emissions, so reducing emissions in industrial production is the key to realizing a low-carbon economy and protecting the living environment of h...

AI Technical Summary

Problems solved by technology

At present, there is only Wei Boqing in China "Methods and Devices for Furnace Oxygen Enrichment and Partial Oxygen-increasing Jet Combustion to Improve Thermal Efficiency (201010115450.7)" which uses oxygen enrichment to increase the flame temperature of the combustion furnace to improve the heat radiation efficiency, thereby improving the thermal efficiency of the combustion furnace The patent of this method, but for the combustion furnace whose thermal efficiency reaches or exceeds 90%, the increase of the combustion flame temperature is small, and some are even so small that the implementation of oxygen-enriched combustion has no practical significance

In addition, the combustion-supporting air entering from the burner in general burners is diffused, that is to say, the air duct in the burner is straight, and some even gradually become larger. Therefore, the combustion-supporting air entering from the burner It is not conducive to combustion support. Although some burners are equipped with cyclone blades, it cannot make the combustion support air from the burner enter the center of the combustion flame to support combustion.

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