Low-NOx self-preheating type high-speed burner and control method thereof

Abstract

The invention relates to a low-NOx self-preheating type high-speed burner and a control method thereof, and belongs to the field of burners. According to the burner, the structural style of an ignition combustion chamber is changed, an outer-side air channel, an inner-side air channel, a secondary air channel and a primary air nozzle are correspondingly formed, and a main fuel gas ejecting position is located at the front half part of a necking section of the ignition combustion chamber. The independent arrangement of an ignition fuel gas loop and a main fuel gas loop is realized structurally,and the ignition fuel gas loop is only used for firing under medium and low temperature, so that the burner has an 'ignition fuel gas' and 'main fuel gas' flow proportion adjustment function. The input proportion of the ignition fuel gas is small, so that the heat insulation combustion intensity in the ignition combustion chamber can be greatly reduced, and the control on NOx is realized; and a large-proportion main fuel gas output position is located at the front half part of the necking section of the ignition combustion chamber, so that fuel gas can be effectively ensured to be ignited stably under medium and low temperature, and cannot be combusted in the ignition combustion chamber under high temperature.

Description

technical field [0001] The invention belongs to the field of burners, in particular to a low NOx self-preheating high-speed burner and a control method thereof. Background technique [0002] Self-preheating high-speed burners are widely used in metallurgical heat treatment furnaces. In order to generate a high-speed flame, this type of burner usually produces a relatively high-intensity combustion reaction in a small space to rapidly heat up the gas and expand its volume, thereby achieving high-speed flame ejection, but the high-intensity combustion reaction in a small space usually has Relatively high NOx emission values. Contents of the invention [0003] In view of this, the object of the present invention is to provide a low NOx self-preheating high-speed burner and its control method, which can greatly reduce the high-intensity combustion in a small space under medium and low temperature conditions, thereby ensuring high-speed flame Under the premise of high tempera...

AI Technical Summary

Problems solved by technology

In order to produce a high-speed flame, this type of burner usually produces a relatively high-intensity combustion reaction in a small space to rapidly heat up the gas and expand its volume, thereby achieving high-speed flame ejection, but the high-intensity combustion reaction in a small space usually has Relatively high NOx emission values

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