Gas nozzle for industrial kiln and distribution method using same

Abstract

The invention discloses a gas nozzle for an industrial kiln and a distribution method using the same. The gas nozzle for the industrial kiln comprises an air inlet outer tube and a gas inlet inner tube, wherein the outer tube is provided with at least two-stage closures to form at least two-stage accelerating regions; and the front part of the inner tube is provided with a gas outlet on the side face and a baffle plate on the end face, so that gas is mixed with air to form eddy. The distribution method using the gas nozzle comprises a step of mixing the gas and the air in a volume ratio of 1:9. The nozzle can make the gas well mixed in an eddy mixing state, achieves long flame and high rigidity, can make the gas fully combusted and has a stable gas excess air coefficient within 1.05; and compared with the conventional nozzle, the nozzle saves the gas by 30 to 50m<3> / ton and has long service life.

Description

technical field [0001] The invention relates to a gas burner used in an industrial kiln and a gas distribution method thereof. Background technique [0002] Gas burners used in industrial furnaces (including natural gas, coal gas, liquefied petroleum gas, etc.) generally consist of an outer tube and an inner tube, the outer tube is used for air intake, the inner tube is used for gas intake, and the outer tube has no air In the acceleration section, the inner tube fire injection adopts a direct injection structure, which causes the following defects: 1. High air consumption 2. The air is introduced at a certain speed at one time without acceleration, making the burning flame soft and short. 3. The structure of directly spraying flames makes the mixing of air and gas unsatisfactory, the excess air coefficient is large, and the fuel combustion is incomplete. 4. The front end of the burner is directly in contact with the high-temperature flame in the furnace, which is easy to b...

AI Technical Summary

Problems solved by technology

[0002] Gas burners used in industrial furnaces (including natural gas, coal gas, liquefied petroleum gas, etc.) generally consist of an outer tube and an inner tube, the outer tube is used for air intake, the inner tube is used for gas intake, and the outer tube has no air In the acceleration section, the inner pipe flame spraying adopts a direct spray structure, which causes the following defects: 1. High air consumption 2. The air is introduced at a certain speed at one time without acceleration, making the burning flame soft and short

3. The structure of directly spraying flames makes the mixing of air and gas unsatisfactory, the excess air coefficient is large, and the fuel combustion is incomplete

4. The front end of the burner is directly in contact with the high-temperature flame in the furnace, which is easy to be burned and melted, resulting in a short service life of the burner

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