Gas burner capable of adjusting gas to be self-recycling

Abstract

The invention discloses a gas burner capable of adjusting gas to be self-recycling. The gas burner capable of adjusting the gas to be self-recycling comprises a center fuel pipe, a primary rotational-flow air duct, a secondary direct-flow air duct and an ejector, wherein the center fuel pipe, the primary rotational-flow air duct, the secondary direct-flow air duct and the ejector are coaxial from inside to outside and sequentially embedded in a sleeved mode. A fuel nozzle is formed in the outlet segment of the center fuel pipe, an air cyclone and a pre-mixing chamber are arranged inside the primary rotational-flow air duct, the primary rotational-flow air duct and the pre-mixing chamber are communicated with the fuel nozzle, both an outlet of the pre-mixing chamber and the outlet end of the secondary direct flow air duct are arranged at the throat position of the ejector, a main flame burning area is formed at the throat position of the ejector, an electronic igniter is further arranged inside the primary rotational-flow air duct, one end of the electronic igniter penetrates through the air cyclone, the ignition electrode of the electronic igniter is arranged inside the pre-mixing chamber, the end surfaces, being connected with the head of the burner, of the ejector are of a sawtooth disk structure and meshed with each other, and linkage mechanisms are arranged at the positions of the sawtooth disk structures and fixed on the outer pipe wall of the secondary direct-flow air duct. The gas burner capable of adjusting the gas to be self-recycling has the advantages of being easy to manufacture, and capable of achieving the objective that the adapting range of fuel is wide, burning efficiency is high, burning is stable, and pollution is low.

Description

technical field [0001] The invention relates to a gas burner in the technical field of thermal energy and power engineering, in particular to an adjustable flue gas self-recirculation gas burner combined with low NOx combustion technologies such as flue gas self-recirculation and air staged combustion. Background technique [0002] Gas burners are widely used in industrial heating furnaces, such as ceramic kilns and annealing furnaces. The number of burners used is large, usually ranging from dozens to one or two hundred. The performance of a single burner is the key factor affecting the production process, product quality and product cost. At the same time, the improvement of the combustion characteristics and performance of the burner is the most direct and effective way to achieve energy saving and emission reduction of the kiln. At present, the design, production and application status of gas burners in my country are: high-end foreign imports, mid-end imitation design, ...

AI Technical Summary

Problems solved by technology

For air staged combustion, the smaller the excess air coefficient in the first-stage combustion zone, the better the effect on suppressing NOx

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