Venturi tube capable of reducing noises and combustor

Abstract

The invention provides a gas nozzle capable of reducing noises and a combustor. The combustor consists of a venturi tube and the gas nozzle, wherein the gas nozzle is used for spraying gas to the venturi tube and meanwhile injecting air; the venturi tube is provided with a venturi tube first end and a venturi tube second end which are opposite; the venturi tube first end is provided with a shrinking portion; the shrinking portion is provided with an air inlet opening which allows injected air to enter the shrinking portion; the shrinking portion is provided with a flow guiding ring which is used for distributing flow to reduce dynamic noises of air; the flow guiding ring is connected with the shrinking portion and is positioned on the inner side of the shrinking portion; the flow guiding ring is provided with an outer surface which faces the shrinking portion and an inner surface which is away from the shrinking portion; a first injection channel is formed between the outer surface ofthe flow guiding ring and the shrinking portion; and a second injection channel is formed in one side of the inner surface of the flow guiding ring.

Description

technical field [0001] The invention relates to an injection type combustion device, in particular to a venturi tube and a burner for reducing noise. Background technique [0002] Existing burners are mainly composed of a venturi tube and a gas nozzle. The function of the gas nozzle is mainly to inject gas at high pressure and inject low-pressure air fluid, and perform energy exchange and material mixing in the venturi tube, so as to achieve the mixed gas in the The purpose of complete combustion at the outlet of the Venturi tube, but because the ultra-high-speed air ejected from the nozzle will generate high-frequency noise at the same time, it is very important to control the noise within an acceptable range for environmental protection. [0003] The current way to reduce the noise of ground torches is mainly to build fences on the outermost periphery, but this method occupies a large area and requires too much land area; the cost of building fences is high; and the scope ...

AI Technical Summary

Problems solved by technology

[0002] Existing burners are mainly composed of a venturi tube and a gas nozzle. The function of the gas nozzle is mainly to inject gas at high pressure and inject low-pressure air fluid, and to perform energy exchange and material mixing in the venturi tube, so as to achieve the mixed gas in the The purpose of complete combustion at the outlet of the Venturi tube, but because the ultra-high-speed air ejected from the nozzle will generate high-frequency noise at the same time, it is very important to control the noise within an acceptable range for environmental protection functions

[0003] The current way to reduce the noise of ground torches is mainly to build fences on the outermost periphery, but this method occupies a large area and requires too much land area; the cost of building fences is high; and the scope of application is small

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