Honeycomb body made of ceramic material

Abstract

A honeycomb body of ceramic material for use in installations for cleaning and/or regenerating gases, comprising a prismatic body, which is penetrated by many rectilinear gas-flow channels parallel to one another, which discharge into both face ends of the honeycomb body, wherein the honeycomb body (1) has at least one tubular recess (5, 5), which is oriented transversely to the direction of the flow channels (4).

Claims

1. A honeycomb body of ceramic material for use in installations for cleaning and/or regenerating gases, comprising a prismatic body, which is penetrated by many rectilinear gas-flow channels parallel to one another, which discharge into two face ends of the honeycomb body, wherein the honeycomb body has at least one tubular recess, which is oriented transversely to the direction of the gas-flow channels, and wherein the at least one tubular recess has a cross-section dimensioned such that the number of gas-flow channels of a transverse plane of the prismatic body lying transverse to the side of the prismatic body into which the tubular recess opens is greater than the number of gas-flow channels of the transverse plane that are not connected by the at least one tubular recess.

2. The honeycomb body of claim 1, wherein the at least one tubular recess comprises two tubular recesses intersecting one another, each of the two tubular recesses extending between two side faces, opposite one another, of the prismatic body.

3. The honeycomb body of claim 2, wherein the two tubular recesses are shaped by a machining method in the honeycomb body in an unfired state.

4. The honeycomb body of claim 1, wherein the at least one tubular recess is shaped by a machining method in the honeycomb body in an unfired state.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention will be described in further detail below in terms of exemplary embodiments in conjunction with the drawings. In the drawings:

(2) FIG. 1 shows a first embodiment of a honeycomb body of the invention in a perspective view; and

(3) FIG. 2 shows a second embodiment of a honeycomb body of the invention.

DETAILED DESCRIPTION OF THE DRAWINGS

(4) The ceramic honeycomb bodies 1 shown in FIGS. 1 and 2 have the form of a rectangular prism, with side faces 2, 3 that are parallel to one another. The honeycomb bodies 1 are penetrated by rectilinear channels 4, parallel to one another, of rectangular cross section, which extend between the side faces and are separated from one another by thin-walled webs. The channels 4 could also have a square cross section. For practical use, the honeycomb bodies 1 can for instance have a prism length of approximately 0.1-1.0 m, in particular approximately 0.15-0.3 m, and a prism end face side length of approximately 0.1-0.5 m, preferably 0.1-0.30 m.

(5) The honeycomb bodies 1 shown in FIGS. 1 and 2 are expediently produced by extrusion (prior to firing), for instance as 4343 cell honeycomb bodies 1 with a geometry of 150150150 mm.sup.3 and with flow channels 4 of 2.92.9 mm, and/or a cell wall thickness of 0.5 mm.

(6) As FIGS. 1 and 2 also show, the honeycomb bodies 1 are provided with tubular recesses 5, 5. After the extrusion, the tubular recesses 5, 5 are obtained by machining methods performed on the green (unfired) honeycomb bodies 1, preferably by drilling, using a core drill of suitable diameter.

(7) Drilling the recess 5 in FIG. 1 is done via a unilateral drilling operation through the entire cross section of the honeycomb body 1. Alternatively, in FIG. 2, two drilling operations are performed, each as far as the center of the honeycomb body 1, for instance. To attain the crosswise-arranged tubular recesses 5 of FIG. 2, each extending extend between two side faces 1 opposite one another, the honeycomb body 1 is processed twice (in the variant where drilling is done all the way through, they are offset by 90 each) or four times (offset each time by 90, in the variant where drilling is done as far as the middle of the honeycomb body).

(8) In practical use, the honeycomb bodies 1 of the invention are lined up with one another and stacked one above the other. For instance, two honeycomb bodies 1 stacked one above the other can each be rotated by 90 from one another in the stack. When honeycomb bodies 1 which have two intersecting tubular recesses 5 are lined up or stacked, the result in each layer is a network-like, open tube system with an extraordinarily favorable transverse flow. However, it is also possible for only the lowermost or the two lowermost honeycomb body layers in a stack to be provided with tubular recesses 5, 5 in the honeycomb bodies 1; then the layers located above them comprise standard honeycomb bodies 1 without tubular recesses 5, 5.