AT392017B - Tower packing - Google Patents

Abstract

The tower packing is used for energy and/or mass exchange installations or mist collectors, for example for cooling towers, for perforating filters in biological effluent treatment plants or for chemical columns, for heat exchangers in direct contact with media, or for fluid distributors or air feeds. It has a plurality of through channels 11 arranged side by side in a grid, through which gaseous and/or liquid media flow. The axes 12 of the through channels 11 extend essentially in the manner of a helix over the majority of their length. Hypothetical matching points on the cross-sectional contours of each through channel, which follow one another along this axis 12, lie on a line parallel to the axis of this through channel, so that a straight line lying in the plane of a cross section and connecting the axis of the through channel and a point on the cross sectional contour essentially maintains its direction in space over the length of this through channel. <IMAGE>

Description

AT 392 017 B

The invention relates to a packing with the features of the preamble of patent 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 material exchange between media, for example in the case of evaporative cooling in cooling towers or in stripping processes for reaction between media, for example in chemical columns, for the promotion of 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 compared to the main channels caused by the protrusions into them, or by the slots 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 streams 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.

Further publications which show and describe swirling fillers are DE-OS 3136 589 and DE-OS 30 48 968. The former shows a filler body which consists of concentrically wrapped tube bundles, in the other filler body all individual elements are designed to rotate in the same direction. SU-PS 1 136 830 also shows a swirling filler. Hose-like channels are formed from axially successively joined pipe sections. These are screwed together in concentric layers. Each layer consists of closely spaced channels and has an opposite direction of rotation compared to the layer below and above it.

The object of the present invention has therefore set itself the task of structurally designing a filler body in such a way that it can be produced easily and that, in addition, its efficiency compared to comparable and known constructions is improved by its special structural shape.

To achieve this object, the invention proposes those measures that are the content and subject of the characterizing part of claim 1. Thanks to this proposal, a straight line lying in the plane of a cross-section and connecting the axis of the through-channel and a point of the cross-sectional contour essentially maintains its direction in space over the length of the through-channel.

In a preferred embodiment, the walls of the passageways have indentations and / or protrusions, and the connecting line of successive indentations and / or protrusions run correspondingly helically to the axis of the passageways. The direction of rotation of this connecting line of the indentations and / or bulges in the wall of a through-channel can be opposite to the axis of the through-channel or it can have the same direction of rotation as this, depending on the requirements for the extent of the media mixture or the Extent of media contact.

The cross sections of the passage channels can have polygonal and / or corrugation shapes, for example form a circle or an oval, but also all corner shapes vc m triangles: k to a polygon are possible. The passageways can be built through pipes. However, the filler body can also be formed from a large number of plates stacked together to form packages. Individual plates have channels which are essentially parallel to one another or are deformed to form channels, the channels being adjacent Plates that form passages for the media. The plates can be arranged so that two troughs of adjacent plates form a circumferentially closed passage channel. The plates -2-

AT 392 017 B can also be connected crosswise with respect to their channel-like deformation, so that the passage channels are open channels.

The cross-sectional type and cross-sectional size ratios between the passage channels and the interstice channels located between them do not necessarily have to be the same.

Likewise, various design options are known with regard to the smoothness or roughness of the duct wall and the attachment of additional knobs, etc., so that this will not be discussed in more detail.

The idea on which the invention is based can be implemented in numerous embodiments. This is explained in more detail using the drawings.

1 to 6 illustrate various embodiments of a filler body according to the invention, wherein each figure is assigned several representations and these representations relate to both details and combinations thereof, which will be discussed in detail in the explanation of the respective figure.

The basic idea of the invention is first explained with reference to FIG. 1: The main direction of extension of the passage channel is designated by (10). This passage channel (11) is adapted to a three-dimensional shaft, the axis (12) of which is helical. (12a) and (12b) show that the axis (12) of the through-channel is designed like a helix, whereby this axis can have a continuous course or can consist of individual straight sections. A combination of straight sections and continuously running sections is also conceivable and possible.

The imaginary cross-sections of the through-channels, which follow one another along the helical axis (12), are arranged without screwing the screw-like axis, so that a straight line connecting the axis of the through-channel and a point of the cross-sectional contour over the length of the cross section lies in the plane of a cross section Passage channel essentially maintains its direction in space.

With (14, 15, 16) and (17), the cross-sectional contours of the through-channel (11) are shown in plan view, which lie in different cross-sectional planes of this through-channel, in the perspective view of which they are shown with (14 ', 15', 16 ') and ( 17 '). The crosses (x) denote the points of intersection of individual cross-sectional planes with the helical axis (12) of the passage channel (11).

In the detailed illustration (18), the cross section through a passage channel provided with bends is shown, in which the unbooked channel walls are designated with (18a), the bulges with (18b) and the indentations with (18c).

From (19a) the principle of four-way bends of the channel walls running along a helical connection line can be seen, which follow the helical axis (12). (19b) shows the opposite direction of the course of the bookings. At (19c) it is shown that several bays can also be located on a partial area of a section of the flow channel. The sequence of bulges to indentations will be discussed later in this description.

Fig. 2 illustrates the embodiment shown in Fig. 1. For the sake of clarity, the reference numbers are omitted from FIG. 1. Along the passage channel, one bay is provided for each channel section, which runs along a helical connecting line.

Fig. 3 shows a cross-sectionally hexagonal passage channel and also the plates having grooves, from which it is formed. (30) and the representation points (o) indicate the main direction of extension of the passage channel (31), which is indicated in Fig. 1 with (10). The crosses (x) denote the centers of the hexagonal cross-sectional contours through which the helical axis of the through-channels runs. The connecting line of these center points (x) is not shown in the drawing for reasons of clarity. It has an angular, irregular course.

A steady course is usually more advantageous. Such a course of the axis of the passage channels is indicated by the dashed line (32). The walls of the passage channels can also have a continuous course over their length, corresponding to the course of the helical axis.

With (33) and (34) it is shown that the axis of the passage channels runs in a preferred embodiment in the area of the inlet zones and / or outlet zones parallel to the main direction of extension (30). For certain types of applications, it can be advantageous if the axes of the inlet zones and / or outlet zones are arranged obliquely to the main direction of extension. This is the case if the inlet of the passage channel only begins in zone (35) and the outlet only ends in a later, also obliquely directed zone.

Furthermore, it can be seen from FIG. 3 that the helical axis of the passage channels executes at least one full, 360 ° rotation over the length of a passage channel. An increase in the number of turns will be discussed later in this description.

In the zone (36) of Fig. 3, the formation of the passages from molded plates (36a) is shown. As a result of the spatial structure of these plates, the interstice channels (36b) which form when the plates are joined also have the same cross section. With (36c) the shape of a single plate is shown and with (36d) a groove is cut, the shape of which can be seen from the zone (36e).

Finally, a structure similar to honey wafers is shown in zone (37), in which the plates (37a) have the structure mentioned in the surface facing towards the inside. Due to the short intermediate slats -3-

Claims (9)

AT 392 017 B (37b), however, results in only approximately quadrangular cross-sections for the space channels (37c) which are formed when the panels are joined together. 4 shows a section of a plate shaped into channels, which is intended to be joined together with a plate of the same shape to form a row of adjacent passages. Such plate pairs are then connected one above the other to form a package, the low-lying zones of one plate pair each resting on the raised zones of the next plate pair, as a result of which the passage channels are also formed. In Fig. 4, the mentioned plate section is shown with (41) in plan, with (42) in side elevation and with (43) in elevation. With (&quot; T &quot;) the deep-lying zones and (&quot; B &quot;) the raised zones of the back and forth and up and down course of the shaped plate are designated. (Bl) and (TI) indicate the highest and (B3) and (T3) the lowest lying zones of these sections. Fig. 4 shows that in this example, the helical axes of the channels that arise when the plates are paired rotate by 360 ° + 180 °. If you imagine the plates to be significantly extended, there are several full 360 ° rotations of the axes. 5, FIGS. 1 and 2 are used, specifically the reference numbers (18b) and (18c). The embodiment shown in Fig. 5 shows one of the possible arrangements of the bay on the walls of the passage channels in individual sections of the same and their helical continuation in the next passage channel section. As shown in (51) and (52), the indentations drawn in zone (50) are indentations (18c) and indentations (18b). Their helical succession in the channel course is indicated by (51 ') and (52'). The shape and combination of the versions of the baying have a corresponding influence on the interstice channels. Another embodiment of the invention is to have the passage channels cross. This achieves media compensation along the individual plates. An example is shown schematically in FIG. 6. A shaped plate (60), which is shown with (61) in a side section and with (62) in plan, is with a counter-shaped plate ( 63) connected. The main directions of extension of the channels are designated with (&quot; o &quot;). The plates are put together in such a way that the grooves formed in the plates cross, which is shown in the overview (64). If several such plates are connected to one another according to the side cut (65), gap channels are again formed here, which are designated by (66) in FIG. 6. Bayings in the walls of the passage channels are not shown in Fig. 6. However, in the sense of the previous explanations, they can also be present in intersecting channels and thus promote, for example, the direction of flow or the swirling of the media. PATENT CLAIMS 1. Packing material for systems for energy and / or material exchange or droplet separators, e.g. B. for cooling towers, 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 characterized in that the axes (12) of the passage channels (11) extend over most of their length essentially in the manner of a helical line and imaginary corresponding points of the cross-sectional contours of each passage channel which follow one another along this axis lie on a line parallel to the axis of this passage channel. 2. Packing body according to claim 1, characterized in that the axis extending in the manner of a helix (12) of a passage channel (11) has a substantially continuous course over its length. 3. Filler body according to claim 1, characterized in that the axis extending in the manner of a helix (12) of a passage (11) over its length consists of essentially straight successive sections. 4. Filler body according to one of claims 1 to 3, characterized in that that the axes (12) of the passage channels (11) in their end regions run essentially parallel to the main direction of extension (11) of the passage channels. -4- AT 392 017 B 5. Packing body according to one of claims 1 to 3, characterized in that the axes (12) of the passage channels (11) in their end regions obliquely, preferably at an acute angle to the main direction of extension (10) of the passage channels. 6. Packing body according to one of claims 1 to 5, characterized in that over the length of the passage channels (11) the axis extending in the manner of a helix (12) has a rotation of at least 360 °. 7. Packing body according to claim 1, characterized in that the walls of the passage channels. (11) have indentations and / or indentations (18b, 18c) and the connecting line of successive indentations and / or indentations (18b, 18c) corresponding to the axis (12) of the flow channels run in a helical manner. 8. Packing body according to claim 7, characterized in that the direction of rotation of the connecting line of the indentations and / or bulges (18b, 18c) in the wall of a passage channel (11) to the axis (12) of the passage channel (11) is opposite. 9. Filler body according to claim 7, characterized in that the connecting line of the indentations and / or bulges (18b, 18c) in the wall of the passage channel (11) has the same direction of rotation as the helical axis (12) of the passage channel. Including 6 sheets of drawings -5-