Venturi mixer with porous orifice plate for promoting mixing effect

Abstract

The invention relates to a venturi mixer with a porous orifice plate for promoting a mixing effect. The venturi mixer comprises a mainstream fluid inflow pipeline, a mainstream fluid shrinkage section, a mainstream fluid throat pipeline, a mainstream fluid diffusion section, a mainstream fluid outflow pipeline and an introduction pipeline; the porous orifice plate is welded on the inner wall of the mainstream fluid throat pipeline; a big hole is formed in the middle of the porous orifice plate, and four small holes are distributed around the big hole. The axis of the big hole formed in the porous orifice plate is coincided with that of a mainstream venturi tube, and the included angles between the axes of the small holes formed in the porous orifice plate and the axis of the mainstream venturi tube are 45 degrees. The venturi mixer provided by the invention can reduce the influence of a boundary layer on the mixing effect, enhance the disturbance of the fluid in a throat region, enhance the mass exchange between the introduction fluid and the mainstream fluid near a central axis, and improve the uniformity of fluid mixing.

Description

technical field [0001] The invention relates to the technical field of Venturi mixers, in particular to a Venturi mixer in which a porous orifice plate promotes the mixing effect. Background technique [0002] Venturi mixer is a fluid mixing device widely used in engineering practice. A common Venturi mixer is a classic Venturi tube with a throat opening, the mainstream fluid flows through the classic Venturi tube, and the incoming fluid enters the throat pipe of the main flow through the inlet pipe. When the mainstream fluid flows into the throat pipe, its flow velocity is fast and the pressure is low, and the pressure difference between the incoming fluid and the mainstream fluid in the throat pipe is used to introduce the incoming fluid to realize the mixing of two different fluids. [0003] There is a boundary layer in the fluid area of ​​the throat pipe wall of the existing Venturi mixer, resulting in a low fluid velocity near the wall, which is likely to cause uneven ...

AI Technical Summary

Problems solved by technology

[0003] There is a boundary layer in the fluid area of ​​the throat pipe wall of the existing Venturi mixer, resulting in a low fluid velocity near the wall, which is likely to cause uneven mixing; and when the mainstream fluid velocity is too high or the flow rate is too large, The incoming fluid cannot flow into the mainstream fluid area near the centerline, which is prone to the problem of low mixing efficiency

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