Multistage preheating dual-mode low-NOx self-preheating burner

Abstract

The invention relates to a multistage preheating dual-mode low-NOx self-preheating burner, belongs to the technical field of industrial combustors, and is mainly used for industrial furnace kilns in the industries of steel, color, machinery, aviation, forging, ceramics and the like. According to the burner, a burner shell is installed at one end of a flue gas flow guiding device, a tiling is installed at the other end of the flue gas flow guiding device, a burner core is mounted on the tiling, an air flue gas deflector is mounted in the burner shell, the air flue gas deflector is matched withthe flue gas flow guiding device, one end of a heat exchanger is mounted on the air flue gas deflector, the other end of the heat exchanger is connected with the tiling, one end of an air guide cylinder is installed on the burner shell, the other end of the air guide cylinder is located in the heat exchanger, one end of a burner end cover and one end of an air cylinder are installed on the burnershell, a smoke exhaust pipe is installed in the air cylinder, and the smoke exhaust pipe is connected with the air flue gas deflector.

Description

technical field [0001] The invention relates to a multi-stage preheating dual-mode low NOx self-preheating burner, which belongs to the technical field of industrial burners and is mainly used in industrial furnaces and kilns in industries such as iron and steel, nonferrous metals, machinery, aviation, forging, and ceramics. Background technique [0002] At present, most of the burners are preheated by themselves, and the flue gas circulates in the outermost cavity of the burner shell, which has the disadvantages of high burner shell temperature, large resistance, relatively low heat transfer efficiency, and low burner power. The nozzle classification effect is not good, the flame is short, the temperature is low, the NOx emission is high, and the burner outlet structure has poor high temperature resistance. In addition, the flameless mode gas pipe extends to the burner nozzle, which is easy to burn out and has short service life, such as the invention patent 201811304912.2,...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the burners are preheated by themselves, and the flue gas circulates in the outermost cavity of the burner shell, which has the disadvantages of high burner shell temperature, large resistance, relatively low heat transfer efficiency, and low burner power. Poor nozzle classification effect, short flame, low temperature, high NOx emission, and poor high temperature resistance of the burner outlet structure

In addition, the flameless mode gas pipe extends to the nozzle outlet, which is easy to burn out and has short service life, such as the invention patent 201811304912.2, which affects its promotion and application in high-temperature, high-performance large-scale industrial furnaces

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