Gas burner for flat fan-shaped flame ultra-low NOx emission large-load cracking furnace

Abstract

The invention discloses a gas burner for a flat fan-shaped flame ultra-low NOx emission large-load cracking furnace, comprising a brazier brick assembly, a cylinder body, a T-shaped gun assembly and 2-6 outer gun assemblies; the brazier brick assembly comprises an upper brazier brick and a lower brazier brick; the middle part of the lower brazier brick is provided with a lower air flow channel, which is a straight flow channel with constant cross-sectional area; the middle part of the upper brazier brick is provided with an upper air flow channel, the two sides of the upper air flow channel are inclined outwards, and the front surface and the back surface of the upper air flow channel are wave-shaped surfaces. The flame emitted by the T-shaped gun assembly and the flame emitted by the large holes of the outer gun assemblies form a flat fan-shaped flame, so that the furnace space is utilized to the maximum extent, the fuel gas can be combusted in the space as large as possible in a whole radiation chamber, the heat distribution in the furnace chamber is uniform, the furnace tube is heated uniformly, the average temperature and the peak temperature of the flame are simultaneously reduced, the emission of NOx is reduced, the generation of carbon monoxide is effectively avoided, and the combustion is stable and reliable.

Description

technical field [0001] The invention belongs to the field of petrochemical burners, and in particular relates to a flat fan-shaped flat fan-shaped blue fan-shaped vortex flame, fueled by natural gas, catalytic dry gas, self-produced dry gas, etc. Flame ultra-low NOx emission gas burner for heavy load cracking furnace. Background technique [0002] The burner is an important part of the ethylene cracking furnace. The heat energy required by the cracking furnace is obtained through the fuel in the burner. The type, performance and configuration of the burner will have an impact on the performance of the cracking furnace. The quality of the burner directly affects the performance of the cracking furnace. It is related to whether the cracking furnace can run safely and stably for a long period of time. [0003] In recent years, with the increase in the size of cracking furnaces and the improvement of environmental protection requirements, higher requirements have been placed on...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an air classification, fuel classification, oxygen enrichment, anaerobic Oxygen combustion technology, flue gas internal circulation technology, multi-point dispersed combustion technology to reduce the temperature of the high-temperature zone in the center of the flame, form a flat fan-shaped long flame, and automatically control the ratio of air and gas to reduce the oxygen content in the furnace to benefit the cracking furnace Uniform distribution of internal heat, and realize large-load combustion and ultra-low NOx emission flat fan-shaped flame ultra-low NOx emission gas burner for large-load cracking furnace

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