Anti-backfire device for gas mixing type combustor

Abstract

The invention relates to the technical field of heat energy engineering, and discloses an anti-backfire device for a gas mixing type combustor. The anti-backfire device comprises a shell, a mixing pipe cavity is fixedly formed in one end of an inner cavity of the shell, a combustion cavity located in the inner cavity of the shell is fixedly formed in one side of the mixing pipe cavity, and four hydrogen pipes are fixedly installed in the inner cavity of the mixing pipe cavity. According to the anti-backfire device, a first spray head is cooled through flowing of air, the flame propagation speed of hydrogen is decreased, meanwhile, the flame propagation speed of natural gas is increased, and the backfire phenomenon is effectively prevented; and by designing that the pipe body diameter value of a protection pipe set changes in a progressive manner, when air flows in a pipe body of the protection pipe set located on the outer surface of the first spray head, insufficient heat absorption caused by heat contained in the air is effectively offset, and when air flows in the pipe body of the protection pipe set located on the outer surface of a second spray head, the reverse heat conduction phenomenon at the position of the second spray head and the reverse cooling problem of an opening in the front end of the second spray head can be avoided.

Description

technical field [0001] The invention relates to the technical field of thermal energy engineering, in particular to an anti-backfire device for a gas-mixed burner. Background technique [0002] A burner is a device that injects fuel and air in a certain way and burns them together. Existing burners mostly use gas mixed combustion, generally a mixture of natural gas and hydrogen. The mixed gas of hydrogen and hydrogen is sent into the mixing tube, and then sprayed out through the nozzle, so that the mixed gas enters the combustion chamber or fire channel for combustion. [0003] For existing burners, because hydrogen has a higher flame propagation velocity than natural gas, when the mixture of natural gas and hydrogen burns together in the inner cavity of the burner, that is, the combustion chamber, backlash is very easy to occur. Fire phenomenon, if there is backfire inside the burner, it will cause the jet device to be burned and deformed. At the same time, it will cause t...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the use of the existing gas-mixed burner proposed in the background technology, the present invention provides a backfire prevention device for a gas-mixed burner, which can effectively prevent the backfire phenomenon at the combustion chamber and ensure the gas injection The advantage that the device is not burned down solves the technical problems raised in the above-mentioned background technology

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