Oxygen-enriched preheating device in combustion furnace with oxygen-enriched nozzle

Abstract

The invention provides an oxygen enrichment preheating device with oxygen enrichment nozzles in a combustion furnace. The device comprises tubular oxygen enrichment preheaters surrounding a combustor in the combustion furnace and oxygen enrichment nozzles connected with the tubular oxygen enrichment preheaters, wherein the oxygen enrichment nozzles are generally in symmetrical distribution on theperiphery of the combustor and are provided with small diffusion angles. The oxygen enrichment preheating device is characterized in that the heat-resistant tubular oxygen enrichment preheaters are installed around the combustor in the combustion furnace and are adhered to or semi-buried in insulating layers which are arranged all around the combustor; the oxygen enrichment nozzles are directly welded on the tubular oxygen enrichment preheaters; in the connectors of the oxygen enrichment nozzles and the tubular oxygen enrichment preheaters in the combustion furnace, each oxygen enrichment nozzle tube is provided with inclined holes extending into the tubular oxygen enrichment preheater tube so as to block the flowing gas in the tubular oxygen enrichment preheater tube from directly entering the connecting pipe of the oxygen enrichment nozzles, wherein the inclined holes are opposite to the airflow direction and are of different lengths, thus the flow of the oxygen enrichment gas flowing through each oxygen enrichment nozzle is similar.

Description

technical field [0001] The invention relates to an oxygen-enriched preheating device in a combustion furnace with an oxygen-enriched nozzle, which is applicable to various industrial boilers, heating furnaces, kilns, furnaces, incinerators, etc. of all fuel gas, and belongs to the technical field of comprehensive energy saving and emission reduction and combustion science technology field. 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 human beings; Energy-saving and emission-redu...

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Problems solved by technology

[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 human beings; Energy-saving and emission-reduction technology has become more and more popular in industrial production, and the biggest advantage of oxygen-enriched combustion-supporting energy-saving and emission-reduction technology is that it not only has good energy-saving and emission-reduction effects, but also has the least modification of the furnace body (only rich Oxygen nozzle and oxygen-enriched preheater are in contact with the furnace body), operating parameters are basically unchanged (combustion air volume is reduced) and can be restored to the original furnace state at any time. However, in the implementation process, oxygen-enriched preheating is a The most troublesome and relatively large investment; for the combustion furnace system that has implemented flue gas heat recovery, it takes heat from the flue leading the flue gas to preheat the oxygen-enriched gas, the workload is large, the cost is high, and it cannot be reduced heat loss; and for the combustion furnace system that does not implement flue gas heat recovery, the cost of preheating oxygen-enriched gas from its flue is too high and the construction is complicated; therefore, it is necessary to find a safe, convenient and low-cost oxygen-enriched gas The preheating method is the key to accelerate the promotion and implementation of high-tech integration technology for oxygen-enriched local oxygen-increasing jets for combustion-supporting energy-saving and emission-reducing

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