Oxygen-enriched spray gun based on Venturi tube structure

The utility model relates to the technical field of fusion of waste incineration fly ash, in particular to an oxygen-enriched spray gun based on a Venturi tube structure. The utility model provides an oxygen-enriched spray gun. The oxygen-enriched spray gun comprises an oxygen-enriched air inlet, an inlet sleeve, a pipe body, a fluid acceleration section, an adsorption chamber, a second fluid acceleration section, a mixing chamber, a fluid speed reduction section, a fuel gas inlet pipe and an ash inlet pipeline, wherein a Venturi pipe structure comprises the inlet sleeve, the fluid acceleration section, the adsorption chamber, the second fluid acceleration section, the mixing chamber and the fluid speed reduction section which are connected in sequence; the oxygen-enriched air inlet is used for introducing oxygen-enriched air; the ash inlet pipeline is used for introducing fly ash by utilizing a negative pressure area generated by the Venturi tube structure and mixing the fly ash with oxygen-enriched air; and