Method for improving combustion temperature of combustion furnace by local oxygen-enriched oxygenation jet combustion-supporting technology and device thereof

Abstract

The invention provides a method for improving combustion temperature of a combustion furnace by a local oxygen-enriched oxygenation jet flow combustion-supporting technology, comprising the following steps: oxygen-enriched gas with higher linear velocity is delivered to some combustion flame position for combustion-supporting through an oxygen-enriched nozzle with a small spread angle; and after pressurization, the oxygen-enriched gas enters a fuel flow area for mixing and combusting at 12-45 degrees with the jet fuel and with linear velocity which is 1.5-5.0 times of the fuel flow velocity in a jet flow manner, wherein the position in which the oxygen-enriched gas enters is at the center of the combustion flame position and is slightly deviated from a fuel nozzle. The invention further provides a corresponding device. The invention has the advantage that by adopting the special oxygen-enriched jet nozzle with the small spread angle and a thermal radiation principle, under the conditions that fuel consumption is not increased, any structure of the original furnace is not changed and only an oxygen-enriched preheating system and the oxygen-enriched nozzle are contacted with a furnace body, the temperature of a combustion flame area is improved maximally.

Description

technical field [0001] The invention relates to a method and device for oxygen-enriched local oxygen-increasing jets in a combustion furnace to support combustion and increase the combustion temperature. , cement kilns and incinerators, etc., which belong to the field of comprehensive energy saving and emission reduction technology and the field of combustion science and technology. Background technique [0002] The purpose of general combustion furnaces is mostly to heat a certain medium, toast certain substances or incinerate certain substances. It is necessary to reach the design temperature, but many combustion furnaces, especially some old The combustion temperature is low due to the increase of production load, or the combustion temperature is low due to the increase of production load, and some oil furnaces are changed to natural gas or gas furnaces due to local environmental protection requirements to reduce sulfide emissio...

AI Technical Summary

Problems solved by technology

Many new combustion furnaces in countries and regions with relatively tight energy sources such as Japan, South Korea, and Europe use oxygen-enriched combustion, but most of their oxygen-enriched combustion uses oxygen-enriched combustion as a whole, and the overall oxygen-enriched combustion is costly and has many side effects , the effect of increasing the combustion temperature is not the best

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