Flameless combustion heat accumulating type high-speed combustion nozzle

Abstract

The invention discloses a flameless combustion heat accumulating type high-speed combustion nozzle comprising a combustion nozzle body, wherein the combustion nozzle body is internally provided with an air or smoke gas passage, a porous heat accumulator, a combustion cavity, a gas pipeline and an ignition device. The flameless combustion heat accumulating type high-speed combustion nozzle is characterized in that the gas pipeline is connected with a flame combustion gas pipe and a flameless combustion gas pipe, wherein the flame combustion gas pipe is provided with a flame combustion control valve to be controlled; the flameless combustion gas pipe is provided with a flameless combustion control valve to be controlled; the flame combustion gas pipe and the flameless combustion gas pipe are both communicated into the combustion cavity; and the aperture of a flameless combustion gas spray orifice positioned on the tail end of the flameless combustion gas pipe is shorter than that of a flame combustion gas spray orifice positioned on the tail end of the flame combustion gas pipe. The flameless combustion heat accumulating type high-speed combustion nozzle has high energy utilization efficiency, ensures the uniformity of furnace temperature, also greatly reduce the discharge amount of NOx, protects various pipelines around the combustion cavity from being combusted, effectively prolongs the service life of the pipelines, and can carry out flameless combustion under high temperature, thereby effectively controlling the flame temperature.

Description

technical field [0001] The invention relates to a burner for high, medium and flaming fuel industrial furnaces, in particular to a flameless combustion regenerative high-speed burner for high, medium and flaming fuel industrial furnaces. Background technique [0002] Regenerative combustion technology is currently the energy-saving combustion technology with the best energy-saving effect in the world. Its principle is to use a pair of burners with a heat storage body for controlled combustion. When one burner burns, the other burner burns. Inhale and exhaust smoke, when the high-temperature flue gas passes through the heat storage body, it exchanges heat with the heat storage body, the heat storage body absorbs heat, and the temperature of the high-temperature flue gas decreases; When a burner burns, cold air or fuel enters the burner from the regenerator with high heat absorption temperature, and is heated by the regenerator; at the same time, the original burning burner su...

AI Technical Summary

Problems solved by technology

[0003] At present, the diffuse combustion method commonly used in the metallurgical industry, although it can reduce NO X Emissions, however, do not apply to cycle furnaces, especially flamed and medium temperature furnaces

Dispersion combustion results in low flaming combustion efficiency, insufficient flame momentum and speed, and cannot meet the requirements of high temperature control accuracy and blast furnace temperature uniformity in periodic furnaces

[0004] In addition, in the aforementioned regenerative burner, since the flame temperature can reach above 2000°C, it is easy to burn out the pipes around the open flame, etc., resulting in shortened service life; especially the metal pipes burn out after being used for a period of time. can't use it

However, if the ceramic pipe is used, although the high temperature resistance is improved, the ceramic pipe is easy to be brittle under the repeated alternating cold and heat in the regenerative combustion process, and its service life is still not long

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