Metallic element with a honeycomb structure

 

(57) Abstract:

The invention relates to a metal element with a honeycomb structure having a large number of channels for the fluid located in the direction of flow and is made of metal sheets. At least some sections of sheet metal provided with forming a channel structure defining cell shape, and at least part of the metal sheets in some areas have additional microstructures. Microstructure are at some angle to the direction of flow and are separated from each other at a certain distance so that they overlap. The crossing of the microstructures has an additional hydrodynamic effect, thereby improving the mass transfer between gas and acting as a catalyst external surface of the individual flow channels. 9 C.p. f-crystals, 3 ill.

The invention relates to a metal element with a honeycomb structure having a large number of channels for the passage of fluid located in the direction of flow and is made of metal sheets that are at least in some areas the supply is her least part of the metal sheets at least in some areas have additional microstructures, located at some angle to the direction of flow and spaced from each other at a distance.

Such a metallic element with a honeycomb structure is known from European application EP 0454712 B1.

This element with a honeycomb structure can be described as quite satisfactory.

Taking into account that acts as the catalyst external surface of the metal element with a honeycomb structure contains a noble metal, it is important to reduce its share in the manufacture of the catalyst, thereby reducing the manufacturing cost of the metal element and at the same time improving its catalytic efficiency.

Therefore, the present invention is the improvement of the well-known metal element with a honeycomb structure, which would increase its catalytic efficiency.

This problem is solved by means of a metal element with a honeycomb structure having a large number of channels for the flow of fluid located in the direction of flow and is made of metal sheets that are at least some what, moreover, at least part of the metal sheets at least in some areas have additional microstructures and these microstructures are arranged at an angle to the direction of flow and are separated from each other at a certain distance. According to the invention, the microstructure of individual metal sheets at least part of the metal sheets overlap.

In a preferred embodiment of the element with a honeycomb structure includes layers of alternating alternating smooth and corrugated sheets and corrugated sheets provided with a microstructure.

In one case it is advisable to make sure that these microstructure of the cross on the crests of the corrugation.

In another case, it is advisable that these microstructures were rebaptized in the troughs of the corrugation.

Not less advisable when the microstructure of the cross on one or on both sides of the corrugation.

These microstructures can be crossed and also on the tops and in the valleys of the corrugation.

Can the microstructure of the cross on the tops of the corrugation and at least one of the side walls of the corrugation or in the troughs of the corrugation and at least n vertices of the corrugation, in the troughs of the corrugation and at least one of the side walls of the corrugation.

May also be an option when the microstructure is made on smooth sheets.

Unexpectedly, it was found that the crossing of the microstructures has an additional hydrodynamic effect. This hydrodynamic effect is that intersecting microstructure enhance mixing of the lateral and Central threads. Due to the improved mass transfer between the gas and acting as a catalyst external surface of the individual flow channels. Improved as the removal of products, and their transportation to the outer surface acting as a catalyst, as in this case, the flow has a component directed towards the surface, due to which this component of flow contributes to more efficient movement towards the outer surface, acting as a catalyst.

It was found that this effect on the flow depends on the position of the intersection points of microstructures.

Depending on where the point of intersection, you can achieve more intensive mixing. If the microstructure of perekrashivaniya flow can be affected, performing a relatively small intersection angle of the microstructure. In the interval between the two microstructures nature of the flow doesn't come close to laminar, so the inside flow with intense stirring.

In elements with a honeycomb structure, which collapsed in a roll of corrugated and smooth metal sheets, plain sheets in accordance with the invention is also provided with a microstructure, passing in the longitudinal direction of the metal sheet. The fabrication of the microstructure, which is housed in transverse relation to the longitudinal direction of the metal sheet, still has not been implemented due to technological reasons, since the force required to twist such a smooth sheet, require the use of tools, developing great efforts to implement rolling sheet metal. In addition, when this sheet, Minas, deformed.

With the proposed implementation of intersecting microstructures on smooth metal sheets, it becomes possible to romaniawith smooth sheet without excessive costs, while achieving an improved mixing. In addition, the greater estolate such described in European application EP 0454712 B1.

Other advantages and features of the invention are described in more detail below in the description of examples of its implementation with reference to the drawings, which depict:

in Fig. 1 - corrugated metal sheet with microstructure,

in Fig. 2 is a second embodiment of a corrugated metal sheet with microstructure and

in Fig. 3 - smooth sheet metal with microstructure.

Metallic element with a honeycomb structure consists of a large number of channels 2 for the flow of fluid F in the direction R of movement of the stream, which is formed by the metal sheets 3 and 4. The metal sheets 3 are corrugated. The metal sheets 4 are smooth. Corrugated and smooth metal sheets are alternately stacked alternating layers.

Corrugated metal sheets 3 is equipped with a microstructure 5. The microstructure 5 is a cross embossed depressions in the form of strips in corrugated sheet 3. As can be seen in Fig. 1, the microstructure 5 cross on the tops of the bumps 6.

In Fig. 2 depicts another embodiment of. It differs from the variant according to Fig. 1 in that microstr the ptx2">

Intersecting corrugated structure form an angle (alpha) with the direction of flow.

In Fig. 3 depicts a smooth sheet 4. Smooth sheet 4 has crossed the microstructure 5.

Intersecting microstructure smooth sheet allow us to drill in a heated state, which until now was only possible for structures, passing in the direction of collapse.

It is also possible to manufacture the item in a heated condition, combining corrugated sheet with microstructure with a smooth sheet having a microstructure.

1. Metallic element with a honeycomb structure having a large number of channels for the flow of fluid located in the direction of flow and is made of metal sheets that are at least in some areas equipped with at least one forming a channel structure defining a honeycomb structure, and at least part of the metal sheets at least in some areas have additional microstructures and these microstructures are arranged at an angle to the direction of flow and are separated from each other on necrorealism sheets, cross.

2. Element with a honeycomb structure on p. 1, characterized in that it consists of layers of alternating alternating smooth and corrugated sheets and corrugated sheets provided with a microstructure.

3. Element with a honeycomb structure on p. 2, characterized in that the microstructure of the cross on the crests of the corrugation.

4. Element with a honeycomb structure on p. 2, characterized in that the microstructure of the cross in the troughs of the corrugation.

5. Element with a honeycomb structure on p. 2, characterized in that the microstructure of the cross on one or on both sides of the corrugation.

6. Element with a honeycomb structure on p. 2, characterized in that the microstructure of the cross on the tops and in the valleys of the corrugation.

7. Element with a honeycomb structure on p. 2, characterized in that the microstructure of the cross on the tops of the corrugation and at least one of the side walls of the corrugation.

8. Element with a honeycomb structure on p. 2, characterized in that the microstructure of the cross in the troughs of the corrugation and at least one of the side walls of the corrugation.

9. Element with a honeycomb structure on p. 2, characterized in that the microstructure of the cross on the tops of th is by Roy p. 2, characterized in that on smooth sheets made microstructure.

Priority points:

26.09.1994 on PP.1, 2, 10;

07.10.1994 on PP.3 - 9.