Static mixing element having deflectors and a mixing device

Abstract

The static mixing element in a flow channel (7) has at least two deflectors (30) disposed on mountings (20) at a distance from the channel wall. The deflectors form an angle W of from 10 DEG to 45 DEG to the main flow direction Z. They have different orientations and the projection FZ of the deflectors in the main flow direction amounts to from 5% to 50% of the channel cross-section F. Cross-flows providing very efficient transverse mixing are therefore produced in a simple manner. When dispensing tubes (20, 21) are used as mountings a very effective mixing device is provided.

Description

BACKGROUND OF THE INVENTIONThe invention relates to a static mixing element in a flow channel, the element having at least two deflectors, and to a mixing device having such element. Simple static mixing elements having deflectors are known but their mixing and homegenising abilities are very limited and they always produce a relatively high pressure drop. More elaborate static mixers, for example, comprising crossing subchannels of slats (Sulzer-SMV-mixers) provide very good mixing but are relatively costly to produce. Good mixing is particularly necessary when a small quantity of a fluid is injected by means of an injection system into a main flow of another fluid in a flow channel. When relatively small quantities, for example, of less than 10%, of a gas or a liquid are admixed into the flow of another gas or another liquid, very one mixing paths in the empty tube are necessary to ensure thorough homogeneous mixing. However, conventional mixing devices having complicated adjustab...

AI Technical Summary

Benefits of technology

to provide by means of the static mixing element a simple mixing device which ensures, with a reduced pressure drop and over short paths, high-quality mixing over the entire channel cross-section and over a wide range of load conditions.

Problems solved by technology

Simple static mixing elements having deflectors are known but their mixing and homegenising abilities are very limited and they always produce a relatively high pressure drop.

More elaborate static mixers, for example, comprising crossing subchannels of slats (Sulzer-SMV-mixers) provide very good mixing but are relatively costly to produce.

However, conventional mixing devices having complicated adjustable injection systems cannot provide thorough mixing over a wide range of loads and more particularly at very low volume flow relationships.

Also, this thorough mixing must be achieved over short paths and with a low pressure drop and known mixing devices cannot provide these two features.

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