Low-heating-value/low-pressure gas combustor

Abstract

The invention discloses a low-heating-value / low-pressure gas combustor, and belongs to the technical field of industrial gas combustor combustion. The technical problem about reduction of NOx emission of a boiler and a heating furnace combusting low-heating-value / low gas supply pressure industrial tail gas is solved. The low-heating-value / low-pressure gas combustor is characterized in that a center air pipe, a primary air channel, a gas channel, a secondary air channel and a tertiary air channel are sequentially and coaxially arranged from interior to exterior; primary air flowing through the primary air channel is swirling air, a plurality of inward jetting inner gas nozzles and a plurality of outward jetting outer gas nozzles are arranged at the front end portion of the gas channel; air flowing through the secondary air channel is direct current air; tertiary air flowing through the tertiary air channel is swirling air, the amount of gas jetted by the inner gas nozzles is 5%-35% of the total gas amount, and the volume of air jetted by the primary air channel is 1%-15% of the total air volume. The low-heating-value / low-pressure gas combustor is simple in structure, the classified combustion method and the thick and thin combustion method are coupled, combustion is complete, flames are stable, low NOx emission is achieved, and various low-heating-value / low-pressure gas combustors are adopted.

Description

technical field [0001] The invention relates to a low calorific value / low pressure gas burner, in particular to a burner for burning industrial tail gas and exhaust gas with low calorific value / low air supply pressure, and a burner for a heating furnace, belonging to the technical field of industrial gas burner combustion. Background technique [0002] Under the general environment of domestic energy saving and emission reduction, my country has intensified its efforts to control environmental problems, and the limits of air pollution emissions have become increasingly strict, and the areas of emission restrictions are not limited to northern heating, industrial boilers and power plant boilers. The requirements for reducing NOx emissions are aimed at the boilers burning industrial waste gas and industrial by-product gas. These industrial waste gases generally have the characteristics of low air supply pressure, low calorific value, and fuel-containing fuels. There are problem...

AI Technical Summary

Problems solved by technology

There are few domestic studies on the NOx emission reduction technology of this type of burner, and there are few international reports

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