Bidirectional axial flow type agitating impeller

Abstract

The invention provides a bidirectional axial flow type agitating impeller, and relates to an agitating device, which comprises an agitating shaft and helical ribbon impellers, wherein the helical ribbon impellers comprise downward pressing type helical ribbon impellers and upturning type helical ribbon impellers, the downward pressing type helical ribbon impellers are positioned in an inner layer, the upturning type helical ribbon impellers are positioned on the periphery, the tops of the downward pressing type helical ribbon impellers and the upturning type helical ribbon impellers are connected together by upper paddles, the bottoms of the downward pressing type helical ribbon impellers and the upturning type helical ribbon impellers are connected together by bottom paddles, the upper paddles are flat paddles, the bottom paddles are tilted paddles, the flat paddles are connected with the top of the agitating shaft by a shaft sleeve, and the tilted paddles are connected with the bottom of the agitating shaft by a shaft sleeve. The bidirectional axial flow type agitating impeller has the advantages that through the combined application of two different types of helical ribbon impellers, two axial flows in different directions are simultaneously generated in materials, the shearing performance is greatly improved, the agitating effect is very good, the agitating efficiency is greatly improved, the bubble forming phenomenon is very little, even the effect of no bubble is realized, and the agitating energy consumption is greatly reduced. The bidirectional axial flow type agitating impeller is especially suitable for agitating multiphase and high-viscosity materials, and the market competitiveness is higher.

Description

technical field [0001] The invention relates to a stirring device, in particular to a bidirectional axial-flow stirring paddle used in industrial fields such as petrochemical industry, biochemical industry, fine chemical industry, medicine and food. Background technique [0002] In petrochemical, biochemical, fine chemical, pharmaceutical and food industries, it is often necessary to carry out operations such as mixing, stirring, dissolving, and dispersing of two or more liquid or solid materials or between liquid and solid materials. The stirring paddle is the core component to realize these operations, and its form and quality directly affect the quality and effect of material reaction. Because different materials have different rheological characteristics, different requirements for interphase dispersion and contact, reaction characteristics, reaction conversion rate, selectivity, etc.; therefore, different types of agitators need to be selected. For low-viscosity media...

AI Technical Summary

Problems solved by technology

For multi-phase and high-viscosity materials, the mixing effect is often poor; take the ribbon-type impeller as an example, which is suitable for stirring high-viscosity (200-500Pa·s) and pseudoplastic fluids, and usually operates in a laminar flow state; The type stirring paddle can form a large circulation with the overall flow being axial and tangential in the stirring tank. It has a wide stirring range, good mixing performance, low shear, strong circulation ability, ultra-low speed operation, low energy consumption, and the stirring speed is 60~ The characteristics of 80rpm; but its disadvantages are: the stirring form of the commonly used single-ribbon or double-ribbon stirring paddles is unified upward or uniform downward pressure, and the middle of the stirring tank is easy to form a dead zone when stirring. The shear performance is weak, which affects the stirring effect

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