Agitating – Stationary deflector in flow-through mixing chamber – Angularly related flat surfaces
Patent
1992-08-28
1994-06-14
Jenkins, Robert W.
Agitating
Stationary deflector in flow-through mixing chamber
Angularly related flat surfaces
366340, B01F 506
Patent
active
053204280
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a mixer installation, a catalyzer installation in towers and the use of such catalyzer installations.
In so-called fixed mixers of a known design, the mixing components are disposed in the mixing towers in such a way that the flow material or material to be mixed is mixed as homogenously as possible. The material to be mixed may consist of gaseous, liquid or solid constituents, or a mixture thereof, and it is also possible to have various phases/physical states of a single substance or individual substances to be mixed. Very many different types of mixing components are known, and they may also be used as cooling or heating components.
Fixed mixers are also used to mix constituents which are intended to react with one another, e.g. to ensure that the reactants react as uniformly and/or as completely as possible. The aim of each installation of mixing components should always be to achieve a relatively high mixing efficiency of the constituents with a relatively low resistance to flow in the main direction or direction of flow of the tower or the mixer.
The mixing efficiency of previous fixed mixer installations depends on the external shape or contours of the individual mixing components and their mutual arrangement. Such installations often have too great flow resistance values, and it is only possible to reduce them at the expense of a thorough mixing of the constituents.
The object of the invention is to create a mixer tower which has a low resistance to flow for the material to be mixed together with good mixing efficiency. Further objects of the invention are to create a catalyzer installation with good mixing efficiency for the reactants and the application and/or use of such catalyzer installations having good mixing efficiency. The invention also relates to a layer having mixing components for a catalyzer installation.
According to the invention such a mixer installation is characterised by the features of the first claim. The catalyzer installation is characterised by the features of the dependent claim 11. The use of the catalyzer installation is characterised by the features of claim 16. The layer comprises catalyzer-coated mixing components. The dependent claims relate to advantageous refinements of the subject matter of the invention.
The resistance to flow is considerably reduced by the mixing components in the tower being provided with ducts, without the mixing efficiency being substantially impaired. Partial flows are displaced to and fro over the cross section and are lightly mixed by the duct components which are alternately inclined towards the main flow direction. In the region where the duct components and the tower clearance meet, mixing efficiency is promoted by additional eddies and the meeting of various partial flows. When several successive duct components made of catalyzer monoliths are installed in the tower, the repeated flow of flow materials in and out of the ducts and the meeting of the flows in the tower clearance contribute towards an improvement in the mixing of the reactants. Furthermore the efficient utilisation of the catalyzer and the throughput is improved by the extension of the flow path, the inclination of the duct components and the increase in turbulence. Finally all this contributes towards an improvement in the course of the catalytic reaction and a reduction in the slip of the reactants (e.g. NH3 slip in Denox catalyzers).
The mixer or catalyzer components or the duct components hereinafter referred to simply as "components"--may be disposed in beds or layers. Adjacent components within a layer or bed and successive components in adjacent layers are advantageous disposed so that they are inclined with respect to one another. The mixing and/or catalyzer components of successive layers or beds are fixed in the tower so that they are twisted with respect to one another, for example.
The spaces between the components in the tower clearance may be completely or partly filled with filler or deflector members or partitions may be provided t
REFERENCES:
patent: 3582048 (1969-06-01), Sarem
patent: 4170446 (1979-10-01), Kocher
patent: 4220416 (1980-09-01), Brauner
patent: 4497751 (1985-02-01), Pluss
patent: 4527903 (1985-07-01), Ruscheweyh
Jenkins Robert W.
Sulzer Chemtech AG
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