AT394442B - Packing material (tower packing) for systems for exchanging energy and/or matter (mass), or eliminator plate - Google Patents

Abstract

The packing material serves for systems for exchanging energy and/or material, or as an eliminator plate, e.g. for cooling towers, for trickling (sprinkling, percolating) filters (biofilters) in biological sewage clarifying (purifying) systems, or for chemical columns (towers), for heat exchangers in direct contact with media, for liquid (fluid) distributors, air feeding lines (feeders) or the like. It also comprises a multiplicity of juxtaposed plates 1 arranged to form packets. The individual plates have channels (grooves) 2 which run essentially parallel to one another, or are deformed to form such channels. The channels 2 of neighbouring plates form throughchannels for the media, and the imaginary cross sections of each channel 2 are essentially the same as one another over their length as regards their shape and size. The envelopes 6 of the two outer corners of the outer edge regions of the imaginary cross sections of the individual channels run in the manner of a helix. The helix-like envelopes of a plate, which are formed by the two outer corners or outer edge regions of the imaginary cross sections, are situated axially parallel to one another and are congruent to one another. <IMAGE>

Description

AT 394 442 B

The invention relates to a packing for systems for energy and / or mass exchange or droplet separators according to the features of the concept of claim 1.

Such fillers are mostly used for direct energy exchange, in which the energy-exchanging media are in direct contact, i.e. without being separated by a wall, for example when exchanging heat in cooling towers, for direct mass transfer between media, for example in the case of evaporative cooling in cooling towers or in stripping processes Reaction between media, for example in chemical columns, to promote biological processes, for example in trickling filters for wastewater treatment, for separation processes, for example droplet separators in cooling towers, for liquid distributors, air feeders and similar applications.

Within the large number of packing elements already known for the aforementioned purposes, the present invention is concerned with the group which is intended to impart a twist to the medium or media.

A system of screw surfaces is known as a typical twist-filler (DE-OS 31 10 859) which forces the media streams to rotate about their axes, the direction of rotation of adjacent screw surfaces being in opposite directions

Furthermore, a plurality of raster-like channels with indentations and bulges of their channel walls are known (DE-OS 36 25 809), these bays, based on the axis of the respective channel, following a helical shape. Since the corner-forming, channel-forming tubes or foils form interstice channels when they are joined together, the latter intentionally have an opposite direction of rotation as compared to the main channels caused by the protrusions or the protrusions into which they protrude.

In another known embodiment (DE-PS 30 16 274) winding channels are provided. Here, a back and forth twist is to be achieved, i.e. a partial twist, which is compensated by partial rotations to the left and to the right to zero total rotation

Furthermore, a spacer for the corrugated trickle plates is known for a cross-flow cooling tower (DE-AS 25 09 570), which is intended to simultaneously impart a rotation to the inflowing or flowing air. The spacers should only be installed in the form of strips with gaps and their rotation should not affect the filling body as a whole, but only the cross-flowing air and only in sections. Each horizontal section of a swirl-distance strip represents a channel with a straight, general axis around which rotation-generating elements are arranged.

Although a helical media guidance by means of the elements comprising the currents is known (DE-PS 21 22 537), the indentation / bulge on the positive / negative side, which is inevitable in the case of deep-drawn film, is both a screw form and an inhibiting counter screw form in this selected type of formation in the channels. There is no conflict between adjacent channels. They also have straight axes.

Furthermore, with regard to a vertical plane, back and forth winding packing channels are known (DE-AS 12 87 096), which, however, have no swirling effect.

The object of the invention has therefore set itself the task of structurally designing a filler body in such a way that its manufacture remains simplified and, on the other hand, the efficiency is additionally improved by a redesign.

To achieve this object, the invention proposes those measures that are the content and subject of the characterizing part of claim 1.

Depending on the manufacturing technology or the intended use, the envelopes run continuously over the length of a channel or they consist of essentially straight sections. In order to further achieve the objective according to the invention, it is expedient for the channels or the channels to have a sufficient curvature or winding over their length and for this purpose it is provided that, seen in the axial direction of the helical envelope curves, the envelope curves assigned to a channel this axis projection touch or overlap each other. The envelope curve can have a rotation angle of 360 ° or more over the length of a channel. Depending on the application, it is also possible to make this angle of rotation smaller than 360 °.

In order to facilitate the penetration of the various media into the packing, it is further provided that the envelopes of a channel in the area near the edge of a plate have a substantially straight section and perpendicular to the edge of the plate, so that the plate packs stacked together to form a packing have straight and open inlet zones.

Measures which serve in particular to intensify the contact between the media which are in direct contact can consist in the fact that, seen in the axial direction of the helical envelope curves, the envelope curves assigned to a channel are represented as ovals. Another possibility is that, seen in the axial direction of the helical envelope, the envelopes assigned to a channel are polygons, in particular rhombuses. For this purpose, the helical envelopes can have a different slope over the length of the channel. Further measures are that at least individual grooves of a plate have bulge-like protrusions on at least part of their walls. Have indentations and the imaginary connection line of consecutive indentations or indentations along a channel run like a helical line. Furthermore, that the imaginary helical connecting line with the envelope of the outer corners or outer edge regions of the channel -2-

AT 394 442 B lies in the same direction and that the imaginary helical connecting line with the envelope of the outer corners or outer edge areas of the channel is opposite

The fillers are formed by stacking plates of the type described and characterized above to form a package. If the envelopes of plates directly adjacent to one another within a package lie against one another, the grooves of these plates form circumferentially closed, spatially wound channels. Within a package, these envelopes of immediately adjacent plates can also enclose an angle with one another, so that the spatially winding channels of adjacent plates intersect.

Without restricting the invention, several exemplary embodiments for such plates are illustrated with the aid of the drawings. FIG. 1 shows a plate of a first embodiment in plan view; Fig. 2 in a side view looking in the direction of arrow (II) in Fig. 1; Fig. 3 is a side view in the direction of the arrow (III) in Fig. 1; 4 shows an oblique view and FIG. 5 shows a filler body, formed from several plates according to FIGS. 1 to 4, the direction of view of this filler body corresponds to the arrow (Π) in FIG. 1, FIG. 6 shows a plate of a second embodiment in top view; FIG. 7 in side view, viewing direction arrow (IV) in FIG. 6 and FIG. 8 a side view in viewing direction of arrow (V) in FIG. 6; 9 shows an oblique view and FIG. 10 shows a filler body, formed from a plurality of adjacent plates according to FIGS. 6 to 9, the direction of view here corresponds to the arrow (TV) in FIG. 6; Fig. 11 illustrates a top view of a third embodiment; FIG. 12 in a side view, viewing direction arrow (VI) in FIG. 11 and FIG. 13 a side view, viewing direction of the arrow (VII) in FIG. 11; FIG. 14 illustrates a filler body, formed from plates according to FIGS. 11 to 13, the viewing direction corresponds to the arrow (VII) in FIG. 11 and FIG. 15 shows the filler body according to FIG. 14 in a side view corresponding to the viewing direction according to arrow (VI ) in Fig. 11, wherein the individual plates are stacked together to form this filler body such that the grooves of the adjacent plates each intersect; 16 is an explanatory diagram.

The plate (1) of the first embodiment is illustrated in plan view and in two side views in FIGS. 1 to 3. The plate (1) consists of a correspondingly stable plastic film and is spatially deformed over its surface, which is particularly clear from the two side views according to FIGS. 2 and 3. In order to make this spatial deformation clear, the following thought experiment is carried out with reference to FIG. 16, which also serves in a corresponding manner for the plates of the other exemplary embodiments. A partial cross-section (X-X) is laid through the plate (1), and in FIG. 16 the cross-sectional line is shown on an enlarged scale compared to the other representations, which here illustrates a downwardly open channel (2), the outer corners of which are shown in FIG (3) are designated. In order to get to the plate (1) or to a groove (2) of this plate, this cross-sectional line or generatrix shown in FIG. 16 executes two superimposed movements, namely a linear straight movement, perpendicular to the plane of the drawing and a movement on one circumferentially closed path, for example on a circle, which is indicated here in Fig. 16 by the dashed line (4), with the result that the envelope of the corners (3) run like a helix. The radius (R) of this circumferentially closed movement path can vary within wide limits. In the embodiment according to FIGS. 1 to 3, an oval (5) was selected as the circumferentially closed movement path, which, incidentally, is clearly recognizable from FIG. 2, the larger axis of this oval lying approximately parallel to the middle plane of the plate (1) and the middle one The radius of this oval corresponds approximately to half the height or depth (T) of the channel (2). The generatrix (Fig. 16) of the channel (2) then describes a spatially deformed surface. 16 shows a cross-sectional contour of a channel (2) of the plate (1). If the cross-sectional line of the channel (2) shown here in FIG. 16 is now extended on both sides, the shape shown being repeated periodically, and the line obtained in this way being moved as the generator in the sense described, the surface of the plate (1 ) described. The spatially winding course of the individual channels (2) clearly illustrates the oblique view of this plate according to FIG. 4. Since the corners (3) of the cross-sectional line of the channels (2) (FIG. 16) end in narrow flats (7) before they run out merge into the next channel to the side, these flats (7) form spatially wound narrow bands, which are referred to here as an envelope (6).

Both from FIG. 1 and from FIG. 4 it can be seen that the envelope curve (6) of a channel (2) in the region of a plate (1) near the edge has an essentially straight profile and to the upper and lower edges (8) and ( 9) of the plate (1) have a right-angled section.

Uniformly shaped plates (1) with the configuration described are now stacked together to form packages (10), the envelope curve (6) lying adjacent to one another within a package (10) of plate (1), and the channels which are essentially circumferentially closed in this way are spatially wound Form channels within the packing. Such a filler is shown in FIG. 5 or a part of such a filler, which is constructed here from three plates (1), with the upper edge in the direction of the arrow (Π) from FIG. 1 on this part of the filler is looked at. It is also possible, however, that the envelope curve of plates immediately adjacent within a package enclose an angle with one another, so that the spatially winding channels (2) of adjacent plates intersect. This crossing angle can vary within wide limits. Depending on the application, one or the other arrangement will be selected.

It can also be seen from FIG. 1 that the envelopes of a channel in the region of a plate near the ranch have a section which is essentially straight and is at right angles to the edge of the plate. Become -3-

Claims (5)

AT 394 442 B, therefore, several plates, as can be seen in FIG. 1 and combined with the described features to form packages (FIG. 5), the spatially wound channels delimited by the channels (2) have upper and lower edge areas (8) , (9) straight inlet zones for the media. The exemplary embodiment according to FIGS. 6, 7, 8 and 9 likewise has spatially extending channels (2) with 5 a trapezoidal cross-sectional contour. The cross-sectional corners (Fig. 16) are not guided here on a continuous closed movement path, but on a movement path that is also circumferentially closed, but consists of more or less straight sections that are at an angle to one another, for example this movement path in the axial direction here helical envelope seen through a rhombus. These envelopes (6) here also run in the manner of a helical line, but 10 this helical line is formed from short straight pieces. In the plates (1) (FIG. 6) that are bonded here, the channels (2) run opposite the edge area (8) of the Plate at an angle. 1 and 6 that the helical envelopes (6), regardless of whether they are formed by continuously running or straight web sections, have a uniform slope over their length. It is within the scope of the invention to vary the slope of the IS helical envelope curves (6) over the length of the channels (2). A further plate (1) according to a further exemplary embodiment is illustrated in a top view in FIG. 11. Here - as can be seen from FIG. 13 - the angle of rotation of the helical envelope (6) is only a few degrees, and furthermore the helical envelope is represented by a straight line Section (12) formed, which is only part of such an envelope consisting of straight sections. These straight sections 20 run in the edge regions (8) and (9) of the plate at right angles to the latter. Fig. 14 now shows a filler (10) which is formed from plates (1) according to Figs. 11 to 13, wherein the grooves (2) of adjacent plates (1) cross like a helix. In the exemplary embodiments shown, in order not to impair the clarity of the illustrations, the channels (2) are each shown with smooth walls. In order to increase the swirling effect for the media and to intensify the contact of the media with one another, it is within the scope of the invention that at least individual channels of a plate have bulge-like indentations or indentations on at least part of its wall and the imaginary connecting line of incoming or outgoing along a channel. Bulges run like a helix. The imaginary helical connection line can coincide with the envelope of the outer corner or edge areas of the channel 30 or the imaginary helix connection line runs in opposite directions with the envelope of the outer corners or outer edge area of the channels. If the channels (2) of the exemplary embodiments discussed were shown with a trapezoidal cross-sectional contour, it should finally be mentioned that this cross-sectional contour can also have other shapes which form channels. 35 PATENT CLAIMS 40 1. Packing material for systems for energy and / or material exchange or droplet separators, e.g. B. for cooling towers, for trickling filters in biological wastewater treatment plants or for chemical columns, for heat exchangers in direct contact with media, for liquid distributors, air feeders or the like. Consisting of a large number of 45 plates arranged side by side in packages, the individual plates running essentially parallel to one another Have channels or are deformed to such and the channels of adjacent plates form passages for the media and the imaginary cross-sections of each channel are substantially the same in shape and size over their length, characterized in that the envelope curves (6) The two outer corners (3) or outer edge areas of the imaginary cross sections of the 50 individual channels run at least over most of their length in the manner of a helix and the shiau formed by the two outer corners or outer edge areas of the imaginary cross sections benlinie-shaped envelopes of a plate lie parallel to one another and are congruent with each other. 2. Packing body according to claim 1, characterized in that the envelopes (6) run continuously over the length of a 55 channel (Fig. 1). 3. Packing body according to claim 1, characterized in that the helical envelopes (6) over the length of a channel consist of essentially straight sections (Fig. 6). 60 4. Packing body according to one of claims 1 to 3, characterized in that, seen in the axial direction of the screw benlinie-like envelopes, the envelopes assigned to a groove tangent or overlap in this axis projection (Fig. 2.7). -4- AT 394 442 B 5. Filling body according to one of claims 1 to 3, characterized in that the helical envelope curves over the length of the channel - seen in the axial direction of the envelope curve - has an angle of rotation of less than 360 ° (Fig. 11) . 6. Filler body according to claim 1, characterized in that the enveloping curves (6) of a channel (2) in the region near the edge of a plate (1) a substantially straight and to the edge (8,9) of the plate (1) perpendicular section have (Fig. 1,11). 7. Packing body according to claim 4, characterized in that, seen in the axial direction of the helical envelopes (¢), the envelopes assigned to a groove (2) are shown as ovals (Fig. 2). 8. Packing body according to claim 4, characterized in that, seen in the axial direction of the helical envelopes (6), the envelopes assigned to a groove (2) are polygons, in particular rhombuses (Fig. 7). 9. Packing body according to claim 7 or 8, characterized in that the longer of the two substantially perpendicular axes of the ovals or rhombuses lie in or parallel to the imaginary central plane of the plate (Fig. 2.7). 10. Packing body according to one of claims 1 to 9, characterized in that the helical envelope curves (6) have a different slope over the length of the channel. 11. Packing body according to one of claims 1 to 10, characterized in that the envelopes (6) from within a package (10) directly adjacent plates abut each other and the channels (2) of these plates form essentially circumferentially closed, spatially wound channels (Fig . 5.10). 12. Packing body according to one of claims 1 to 9, characterized in that the envelopes of an immediately adjacent plates within a package enclose an angle with one another and the spatially winding grooves of adjacent plates intersect. 13. Packing body according to one of claims 1 to 12, characterized in that at least individual grooves of a plate have bulge-like bulges or indentations on at least part of its wall and the imaginary connecting line of successive indentations or bulges in the manner of a along a groove Helix. 14. Packing body according to claim 1, characterized in that the average radius (R) of the helical envelope (6) corresponds approximately to half the depth (T) of the channel (2) (Fig. 16). With 4 sheets of drawings -5-