Device for cleaning water contaminated with sediment and light liquids

Abstract

Device for cleaning water contaminated with sediment and light liquids, comprising a cylindrical or cubic container (1), a water inlet (2) into the container (1), a water outlet (10) from the container (1), wherein the water inlet and the water outlet are arranged substantially radially to a vertical axis of the container extending between a bottom and the top of the container, a collection chamber for sediment (12) in the region of the bottom of the container (1), and several flow guide plates forming several parallel flow paths between them and connected to each other as a package, wherein means are provided for moving the flow guide plates relative to the container (1) during cleaning operation, characterized in that the package is rotatably arranged in the container, with an axis of rotation arranged parallel to the vertical axis of the container.that the package is movable in and against the direction of the vertical axis of the container, that the package consisting of the several flow guide plates has a cylindrical shape or the shape of a prism with the base of a polygon, in particular a rectangle, hexagon or octagon, that the container is provided with distribution devices to guide the flow within the container, the distribution devices having guide plates arranged parallel to the vertical axis of the container, that if the package has a cylindrical shape, the guide plates bear loosely against the circumference of the package consisting of several flow guide plates in sections, or that if the package has the shape of a prism with the base of a polygon, there is a gap between the edges of the guide plates and the circumference of the package, which allows rotation of the package.

Description

[0001] The invention relates to a device for cleaning water contaminated with sediment and light liquids.

[0002] Rainwater flowing from urban traffic areas and other sealed surfaces is often heavily contaminated with solids, and less frequently with traces of oil or gasoline, which must be removed before being discharged into ecologically sensitive water bodies. Cross-flow clarifiers are well-known sedimentation and oil separators that can separate settleable solids and light liquids from rainwater runoff.

[0003] The cross-flow clarifier, a basic form of an inclined clarifier or lamella separator, has long been state of the art. The incoming liquid is introduced into the spaces between a number of parallel plates or lamella elements and flows slowly through them in a horizontal direction. These plates are inclined perpendicular to the direction of flow. Settling substances from the flow settle on the surface of the plates and can slide downwards into a sump perpendicular to the direction of flow, following gravity and the inclination of the plates. Even substances that are lighter than water can be removed, such as light liquids such as oil or gasoline. Oil droplets rise and collect under the plate above, where they aggregate into larger droplets and then, following the inclination of the plates in the opposite direction, rise to the water surface, where they, for example,can be held back with a diving wall.

[0004] Since residues of sediment and possibly oil can stick to the plates or slat elements, cleaning is often necessary. This can be done manually. Another common method is to spray down the plates or slat elements.

[0005] US Patent No. 4,194,976 A discloses a device for purifying water contaminated with sediment and light liquids. The device comprises a circular-cylindrical container, which is provided with a water inlet and a water outlet. The water inlet and the water outlet are located opposite each other. A collecting chamber for sediment is provided in the area of ​​the bottom of the container. Flow guide plates in the form of diagonally mounted membranes or foils are provided within the container, forming several parallel flow paths between them. The membranes or foils are mounted within a frame, thus forming a package.

[0006] French patent application FR 2 689 781 A1 discloses another device for cleaning water contaminated with sediment and light liquids. The device comprises a circular-cylindrical container with a lid for closing the top of the container. The container is provided with a water inlet and a water outlet, the water inlet and the water outlet being opposite one another. A collecting space for sediment is arranged in the region of a bottom of the container. Within the container, several flow guide plates are provided, each having the shape of a funnel. The several funnels are stacked one inside the other to form several parallel flow paths between them, and the several funnels are connected to one another to form a package. The outer diameter of the funnels essentially corresponds to the inner diameter of the container.

[0007] German patent application DE 10 2013 210 473 A1 discloses a device for cleaning water contaminated with sediment. Two consecutively arranged sets of flow guide plates are provided in a basin, with a plurality of parallel flow paths formed between the flow guide plates. Each set of flow guide plates can be pivoted from a horizontal position to an inclined or vertical position.

[0008] Another device for cleaning sediment-laden water is known from German patent application DE 10 2010 003 633 A1. It comprises several packages of flow guide plates arranged side by side. Each package can be pivoted from an inclined position to an approximately vertical position.

[0009] German patent application DE 198 50 320 A1 discloses a device for cleaning sediment-laden water, which features roof-shaped flow guide plates. The roof-shaped flow guide plates are arranged so that they open upwards.

[0010] German utility model DE 83 25 163 U1 discloses another device for cleaning sediment-laden water using roof-shaped flow guide plates. The flow guide plates are arranged so that they open downwards. Two packages, each with roof-shaped flow guide plates, are arranged directly next to each other.

[0011] German patent application DE 23 63 540 A discloses a thickener for separating particles of a solid and a liquid. The thickener has flow guide plates that can be pivoted.

[0012] German patent DE 12 53 673 B discloses a device for cleaning sediment-laden water. The device comprises a package of several flow guide plates. The flow guide plates can be pivoted from an inclined working position to a vertical position and / or pulled out of the tank.

[0013] European patent EP 0 836 876 B1 discloses a device for cleaning water contaminated with sediment. A stack of parallel, flat flow guide plates can be pivoted between a vertical and an inclined position.

[0014] German patent application DE 27 15 049 A1 discloses a separator for light liquids with several flat flow guide plates arranged parallel to the flow direction. The flow guide plates are arranged parallel to the flow direction in a rectangular container. A stack of the several flow guide plates arranged parallel to one another extends from a right-hand side wall of the container, as seen in the flow direction, to a left-hand side wall of the container. The flow guide plates can each be pivoted about a common pivot axis perpendicular to the flow direction.

[0015] The invention is intended to provide a device for cleaning water contaminated with sediment and light liquids, which is compact in design and easy to clean during operation.

[0016] According to the invention, a device for cleaning water contaminated with sediment and light liquids is provided with the features of claim 1. Advantageous developments of the invention are described in the subclaims.

[0017] According to the invention, a device for cleaning water contaminated with sediment and light liquids is provided, comprising a cylindrical or cubic container. Furthermore, a water inlet into the container and a water outlet from the container are provided, wherein the water inlet and the water outlet are arranged substantially radially to a vertical axis of the container, which extends between a bottom and the top of the container. The device is further provided with a collection space for sediment in the region of the bottom of the container and with a plurality of flow guide plates, which form a plurality of parallel flow paths between them and which are interconnected to form a package. Finally, the device provides means for moving the flow guide plates relative to the container during a cleaning process.

[0018] The provision of means for moving the flow guide plates relative to the container during a cleaning process makes it possible to clean the flow guide plates without disassembling the device. Due to the compact design of the device, it must be cleaned at regular intervals, for example several times a year. With the device according to the invention, this cleaning can be carried out without removing the flow guide plates from the container. Rather, the flow guide plates only have to be moved relative to the container. This creates a sloshing movement between the flow guide plates, which sets any sediment resting on the flow guide plates in motion, so that it can slide off the flow guide plates or sink into the sediment collection space.Similarly, any droplets of light liquids adhering to the flow guide plates can be dislodged by the movement relative to the container, allowing them to rise and be collected appropriately. In any case, the flow guide plates can be cleaned without having to empty the container and without having to remove the flow guide plate assembly from the container. The container can be provided with a lid to seal its top.

[0019] According to the invention, the package is arranged rotatably in the container, with an axis of rotation being arranged parallel to the vertical axis of the container.

[0020] The rotatable arrangement of the package around a rotation axis parallel to the vertical axis of the container enables particularly effective, simple and quick cleaning of the flow guide plates. For example, the package consisting of several flow guide plates is pivoted back and forth around the rotation axis using a simple lever. This creates a sloshing movement in the flow paths between the flow guide plates, which loosens sediment and light liquids from the flow guide plates so that they can then be drained away. Such cleaning by means of a rotation movement can be carried out in an extremely short time and therefore does not require extensive and time-consuming maintenance. For example, a rotary crank could even be inserted through an opening in the lid, so that the container does not even have to be opened for cleaning.

[0021] According to the invention, the package is movable in and against the direction of the vertical axis of the container.

[0022] Even such a simple up-and-down movement within the container creates the desired sloshing motion in the flow paths between the flow guide plates. Cleaning can thus also be achieved by an up-and-down movement. Within the scope of the invention, a combination of a rotary movement with an up-and-down movement of the flow guide plate stack is also possible.

[0023] According to the invention, the package of the plurality of flow guide plates has a circular cylindrical shape or the shape of a cylinder with the base area of ​​a regular polygon, in particular a hexagon or an octagon.

[0024] The projection of the flow guide plates in the direction of the vertical axis of the container is thus circular-cylindrical or has the shape of a regular polygon. Due to this shape, the package of multiple flow guide plates can be easily rotated within the container around a rotation axis arranged parallel to the vertical axis of the container. The container is then advantageously circular-cylindrical and designed as a prefabricated standard shaft. To clean the flow guide plates, a rotation or back-and-forth movement of a few degrees is sufficient. Even if the package of multiple flow guide plates with a polygonal shape is surrounded by fixed baffles, such a movement can be achieved without problem. A circular-cylindrical shape of the package allows for any swivel angle.

[0025] According to the invention, the container is provided with distribution devices to guide the flow within the container.

[0026] The distribution devices have the very important task within the scope of the invention of evenly distributing the flow between the superimposed spaces between the flow guide plates. Without distribution devices, the water would flow at high speed towards the opposite outlet at the level of the water inlet, whereas in the spaces between lower-lying flow guide plates the flow would be low or even in the opposite direction. On the one hand, plates can be used as distribution devices that are arranged parallel to the vertical axis of the container and are essentially perpendicular to the flow and are provided with openings for flow through. Such openings can, for example, have a comparatively small cross-section at the level of the water inlet and a larger cross-section towards the bottom, as the distance from the water inlet increases.If such a flow distribution device is not intended to prevent the inflow of light liquids, such as oil, the openings in the plate can be in the form of elongated holes with a width that increases from the top to the bottom of the container.

[0027] According to the invention, the distribution device has guide plates arranged parallel to the vertical axis of the container.

[0028] By means of baffles arranged in this way, the flow within the container can be guided in the desired manner, namely that the flow guide plates are flowed through in parallel and at the same time an area with no or insignificant flow is realized to the side of the flow guide plates, in which space the sediment can then reach the bottom of the container without being stirred up again.

[0029] In a further development of the invention, the guide plates are loosely attached in sections to the circumference of the package of several flow guide plates.

[0030] In this way, the baffles can provide a pivoting support for the stack of multiple flow guide plates. The baffles guide the stack of multiple flow guide plates when it is rotated back and forth during cleaning. Similarly, the baffles can guide the stack of multiple flow guide plates when it is moved up and down parallel to the vertical axis of the container.

[0031] In a further development of the invention, the distribution devices are designed to provide at least a first section of the container through which no or only a slight flow is carried, said first section being laterally adjacent to the package with the flow guide plates, viewed perpendicular to the vertical axis of the container.

[0032] Such a section of the tank with no or only a slight flow creates space for the sediment to slide or sink to the bottom of the tank. A collection space for sediment is then provided in the area of ​​the bottom of the tank.

[0033] In a further development of the invention, the distribution devices comprise an inlet distribution device with at least two guide plates arranged parallel to the vertical axis of the container and an outlet distribution device with at least two guide plates arranged parallel to the vertical axis of the container.

[0034] In this way, on the one hand, a flow can be directed from the inlet to the outlet of the container and, at the same time, flow shadows are created to the left and / or right of a connecting line of the baffles, which then create a space for sediment to slide or sink.

[0035] In a further development of the invention, the two guide plates of the inlet distribution device and the two guide plates of the outlet distribution device each have a side edge running parallel to the vertical axis of the container, which is arranged directly adjacent to the circumference of the package or rests against the circumference of the package.

[0036] If the stack of multiple flow guide plates is circular-cylindrical, the guide vanes can be in contact with the stack, yet the stack can still pivot. If the stack is polygonal, the guide vanes must either be arranged at a short distance from the stack, or cleaning must be achieved by the stack's up-and-down movement.

[0037] In a further development of the invention, the guide plates are arranged parallel to each other.

[0038] In a further development of the invention, the distribution devices are designed to provide at least a second section of the container through which there is no flow or only a slight flow in the region of the bottom of the container as a collecting space for sediment.

[0039] In a further development of the invention, the guide plates arranged parallel to the vertical axis of the container end above the bottom of the container and the collection space for sediment is formed between the bottom of the container and the guide plates.

[0040] In a further development of the invention, a baffle arranged transversely to the flow direction in the outlet is arranged within the container in front of the water outlet to retain light liquids within the container.

[0041] The plurality of flow guide plates may be connected by means of a pipe arranged substantially parallel to the vertical axis of the container, one end of which is arranged in the sediment collection space and the other end of which is accessible from a top side of the container. In this way, the sediment collected in the sediment collection space can be easily sucked out through the pipe.

[0042] In a further development of the invention, the flow guide plates each have two sections arranged at an angle of less than 180° to each other, which are connected to each other in the region of a ridge edge.

[0043] The flow guide plates are each designed like a gable roof. For example, two flat sections can be connected at an edge. This allows sediment to slide down the sloped sections on either side of the flow guide plates. Light liquids are collected below the ridge edge of the flow guide plates and can rise through holes in the ridge. The light liquids, especially oil, then collect at the water surface and are retained there by a baffle.

[0044] In a further development of the invention, the flow guide plates are each designed like a saddle.

[0045] A saddle-shaped design of the flow guide plates is one in which a curved edge or one consisting of several sections arranged at an angle to one another connects a left and right half of the flow guide plates. The two sections of the guide plates can be curved so that they have a concave shape when viewed from the top side of the container. The two sections of the flow guide plates can also consist of several flat pieces angled to one another, resulting in a concave or inwardly curved surface when viewed from the top side of the container.

[0046] Alternatively, the flow guide plates can be flat.

[0047] In a further development of the invention, the flow guide plates have beads or ribs which extend essentially along imaginary planes arranged parallel to the vertical axis of the container.

[0048] Such beads or ribs can, on the one hand, contribute to stiffening the flow guide plates. On the other hand, they can create obstacles for water flowing between the flow guide plates. This allows sediment to be separated from the water even more effectively. Since the beads or ribs extend within imaginary planes arranged parallel to the vertical axis of the tank, they essentially run in the direction the sediment slides off the flow guide plates.

[0049] In a further development of the invention, the package of flow guide plates can be removed from the container in the direction of the vertical axis of the container.

[0050] In this way, the package of flow guide plates can be easily pulled out of the container, for example if it needs to be cleaned outside the container by spraying.

[0051] The flow guide plates can be movable relative to one another within the stack. Relative movement of the flow guide plates within the stack can also generate the desired sloshing motion in the flow paths between the flow guide plates, which then leads to the detachment of sediment and light liquids deposited on the flow guide plates. For example, the flow guide plates can be rotated relative to one another. The flow guide plates can also be pivotally connected to one another at two opposite side edges and pivotable in a parallelogram manner.The flow guide plates can also each have a first and a second section that are pivotally connected to one another, and the respective first sections of the flow guide plates can be pivoted like a parallelogram, and the respective second sections of the flow guide plates can also be pivoted like a parallelogram. In this way, for example, the sections of the flow guide plates can move like butterfly wings. For example, the sections of the flow guide plates are pivotally connected to one another, and the respective outer edges of the flow guide plates are moved up and down to create a sloshing movement between the flow guide plates. The flow against the flow guide plates is parallel to the joint axis, so that the first and second sections are next to one another as seen in the direction of flow. For example, the first section is on the left and the second section is on the right as seen in the direction of flow.

[0052] Further features and advantages of the invention will become apparent from the claims and the following description of preferred embodiments of the invention in conjunction with the drawings. Individual features of the various illustrated and described embodiments can be combined with one another in any desired manner without exceeding the scope of the invention.

[0053] The drawings show: Fig. 1 is an isometric, partially sectioned view of the device according to the invention from above, Fig. 2 a longitudinal section through the device of the Fig. 1, Fig. 3 a plan view of the device of the Fig. 1, Fig. 4 a package of flow guide means of the device of Fig. 1, Fig. 5 a package of flow guide means according to a further embodiment of the invention, Fig. 6 a flow guide plate according to a further embodiment of the invention, Fig. 7 a package of flow guide plates according to another embodiment of the invention, Fig. 8 a flow guide plate according to a further embodiment of the invention, Fig. 9 a flow guide plate according to a further embodiment of the invention, Fig. 10 a flow guide plate according to another embodiment of the invention, Fig. 11 a flow guide plate according to a further embodiment of the invention, Fig. 12 a flow guide plate according to a further embodiment of the invention, Fig. 13 a plan view of a device according to the invention according to a further embodiment, Fig. 14 a package of flow guiding means according to a further embodiment in an operating state, Fig. 15 the package of flow control devices of the Fig. 14 in one movement during a cleaning process, Fig. 16 the inlet distribution device of the device of Fig. 1 in isometric view and Fig. 17 a flow guide plate according to another embodiment of the invention.

[0054] The representation of the Fig. 1 shows a tank 1, which in the illustrated embodiment is designed as a circular cylindrical concrete sewer shaft inserted into a rainwater sewer line and which, during operation, is filled with water up to the height of an outlet and is thus designed as a permanent reservoir. Within the scope of the invention, the tank 1 can also be prismatic with a polygonal base, for example, even cubic. Both circular and cubic tanks are available in standardized and prefabricated versions. A water inlet 2 feeds the rainwater radially into the tank. An inlet distribution device, consisting of two lateral guide plates 3 arranged vertically in the tank 1, and a distribution plate 4, has the task of distributing the inflow evenly between the spaces 5 of a package 7 comprising several flow guide plates 6. The flow through these spaces 5 is essentially horizontal.On the side opposite the water inlet 2, the tank 1 has an outlet distribution device comprising two guide plates 8 arranged vertically in the tank 1, which collect the flow and direct it under a baffle 9 to the water outlet 10. The baffle 9, together with the raised upper edges of the guide plates 8, has the task of retaining light liquid in the tank 1. The bottom of the water outlet 10 defines a permanent dam 11, see . Fig. 2, as a permanent water level in tank 1.

[0055] The package 7 consists of several flow guide plates 6 stacked one above the other with a defined distance. The flow guide plates 6 are each folded in a roof shape, see also Fig. 4, and thus form two inclined sections. In the top view, see Fig. 3, the package 7 has a circular circumference. Each flow guide plate 6 is thus created from an elliptical cut, for example, from sheet metal. The gable roof shape of the flow guide plates 6 is then created by bending the sheet metal around the ridge edge.

[0056] How Fig. 3, the package 7 fits into the space formed by the side edges of the guide plates 3 and 8 facing the package. The side edges of the guide plates 3 and 8 rest on the outer circumference of the package 7 and thus guide it when it is inserted into the container, when it is removed from the container and during a rotational movement about a vertical axis of the container, as will be explained.

[0057] The inclined sections of the saddle roof-shaped flow guide plates 6 guide the sliding sediment into the space between the edges of the guide plates 3 and 8, in Fig. 3 into the circular section 13 above or below the package 7. Since Fig. 3 represents a plan view, in the installed state of the device according to the invention, the spaces 13 are thus located to the left or right of a main flow direction through the container 1, which runs from the water inlet 2 to the water outlet 10. Due to the baffles 3, 8, these spaces 13 are in the flow shadow and are not or only to a very small extent flowed through, so that the sediment settling there cannot be stirred up again by the flow.

[0058] Tank 1 is designed as a permanent storage tank. After the cleaning process by moving or shaking the flow guide plates, the contents of the tank, including the cleaned-off dirt or sludge, can also be emptied into a sewer or other container. For this purpose, pumps (not shown) or a drainage pipe at the bottom of the tank can be provided. The next time it rains, the volume refills to the height of the permanent storage.

[0059] If package 7 is used according to the embodiment of the Fig. 5 is installed in the container 1, wherein the flow guide plates 6 are arranged according to Fig. 5 consist of flat, elliptical plates, the sediment can only slide off the flow guide plates 6 in one direction. In this case, only a single space 13 would be formed in the container, and the package 7 can then expediently be arranged asymmetrically offset from the vertical axis of the container 1.

[0060] Light liquids, such as oil, collect below the ridge edge of the roof-shaped flow guide plates 6, see Fig. 1, Fig. 2 and Fig. 4. In these ridge edges, see Fig. 4, holes 14 are arranged. Light liquids can thus rise into the spaces between the lamellae above and finally to the water level 11. As already explained, light liquids then float on the water level and are held back by the baffle 9, see Fig. 2.

[0061] As in Fig. 1, Fig. 2, Fig. 3 and Fig. As can be seen in Figure 4, the individual flow guide plates 6 of the stack 7 are lined up on a centrally extending rod 15 and are rigidly, or at least non-rotatably, connected to this rod. According to an embodiment of the invention not shown, the rod 15 can be designed as a tube, whereby sediment collecting at the bottom of the container 1 can then be sucked upwards through this tube.

[0062] The rod 15 is mounted on the bottom of the container, for example, by being inserted into a blind hole or a suitable bearing on the bottom of the container. For the sake of clarity, such a mounting is not shown in the illustrations of the Fig. 1 and Fig. 2 is not shown. However, it is obvious to the person skilled in the art how such a bearing, for example in the form of a simple bushing, can be designed. In small systems, it is sufficient if the rod 15 rests on the bottom of the container. At the upper end, the rod 15 is provided with a crank handle 21. By means of this crank handle, the entire package 7 can be rotated about the vertical axis of the container 1, which coincides with the rod 15. During such a rotation, as already explained, the package is guided by the edges of the guide plates 3, 8, which, see Fig. 3, on the outer circumference of the package 7. The package 7 can now be rotated, for example, as in Fig. 1, indicated by a double arrow, back and forth by a certain angular amount. This creates a sloshing motion in the spaces 5 between the individual flow guide plates 6, which loosens or detaches sediment resting on the flow guide plates 6, so that it can then slide along the flow guide plates 6 into the spaces 13. From the spaces 13, the sediment then reaches the bottom of the container 1, where a space 12 for collecting sediment is formed.

[0063] The sloshing motion also loosens any droplets of light liquids, such as oil, adhering to the flow guide plates 6, allowing them to rise below the ridge edges of the individual flow guide plates 6. As already described, the droplets of the light liquids can then pass through the holes 14 to the water level 11 within the container 1.

[0064] The rotating movements allow for very easy cleaning of the flow guide plates 6 of the package 7. Specifically, the package 7 does not need to be lifted out of the container 1. Instead, it is sufficient to lift off a lid of the container 1 and then clean the package with a few quick rotating movements. This type of cleaning can be performed easily, even several times a year, with very little time expenditure.

[0065] In an embodiment of the invention not shown, it is possible to place a rotary crank through an opening in the lid and then to set the package 7 in rotational movement even without lifting the lid.

[0066] At the upper end of the rod 15 there is also an eyelet 22, see Fig. 1 and Fig. 2. Using the eyelet 22, the entire package 7 can be slightly raised vertically and lowered again without rotating it. This is indicated by a double arrow in the Fig. 1. The cleaning effect is similar to that of a rotating movement of the package 7. A sloshing movement occurs in the spaces between the flow guide plates, which leads to the sliding off of the overlying sediment or the rising of deposited light liquids.

[0067] The package 7 can be guided during a rotary movement as well as during lifting and lowering by a lower central bearing at the bottom of the container. In a manner not shown, the package can also be mounted in the area of ​​the rod 15 above the package 7. For small systems, for example for installation in a sewer shaft, it is also possible for the central rod 15 to simply stand on the shaft floor or on a crossbeam without a special pivot bearing, and for the package 7, see Fig. 3, is given sufficient guidance by the four edges of the guide plates 3, 8, so that the described pivoting movement or up and down movement for cleaning is possible.

[0068] The representation of the Fig. 13 shows a plan view of a device according to the invention according to a further embodiment of the invention. The only difference to the device shown in Fig. 1 to 3 lies in the circumference of the package 7, which has the shape of a regular octagon. The described rotary movement for cleaning around the vertical axis of the container by means of the rod 15 requires only a small pivot angle, so that such a rotary movement can also be carried out with a design of the individual flow guide plates 6 with a polygonal circumference, in particular an octagonal circumference. In addition to the octagonal circumferential shape shown, the individual flow guide plates 6 can also be designed to be square or hexagonal, for example. In these cases, i.e. with a generally polygonal circumference of the package 7, there is a gap between the edges of the guide plates 3, 8 and the circumference of the package 7, which enables the rotary movement. The raising and lowering of the package 7 is obviously also possible with a polygonal design of the individual flow guide plates 6 or of the entire package 7.

[0069] If, during the cleaning of the device 8, the sediment deposited at the bottom of the container 1 is to be removed, this can be sucked out together with the water in the container 1 using a suction truck and a suction hose. The suction hose can be used, see Fig. 3, through one of the chambers 13. If oil has accumulated on the water surface, this should be removed separately beforehand.

[0070] It has already been explained that it is possible to provide a continuous pipe instead of the continuous rod 15 and then to suck the sediment lying at the bottom of the tank 1 in the sediment collection chamber 12 through such a pipe. For this purpose, the guide pipe would have to be fitted with a hose coupling at an accessible location at the top.

[0071] As already described, it is also possible to pull the entire package 7 upwards out of the container 1 by means of the eyelet 22 and then clean it, for example, by spraying it down. The container itself is then easily accessible for inspection and cleaning, for example, using a ladder 25, see Fig. 3, which can be permanently installed. After inspection or cleaning, the package 7 is reinserted into the correct position. The permanent reservoir 11 or water level refills automatically the next time it rains.

[0072] The representation of the Fig. Figure 6 shows a flow guide plate according to a further embodiment of the invention. The flow guide plate is roof-shaped and differs from the flow guide plates 6 of Fig. 4 by beads or ribs 16 arranged in the inclined sections of the flow guide plate 6. The beads or ribs 16, on the one hand, stiffen the flow guide plate 6, and on the other hand, they are arranged within imaginary planes that are parallel to the vertical axis of the container 1 or parallel to the rod 15. The ribs or beads 16 thus guide the sediment resting on the flow guide plate 6, but do not hinder its sliding movement, since they are arranged essentially in the direction of fall or sliding of the sediment. The same applies to the direction in which light liquids rise up the flow guide plates 6.

[0073] The representation of the Fig. Figure 7 shows a package of four flow guide plates 6 according to a further embodiment of the invention. The individual flow guide plates 6 are, like the flow guide plate 6 of Fig. 6, provided with ribs or beads 16. In contrast to the flow guide plate 6 of the Fig. 6, the flow guide plates 6 are arranged according to Fig. 7 are provided with spacers 17 in the form of downwardly projecting projections. The spacers 17 can, for example, be embossed into the flow guide plates 16 and ensure a constant gap 5 between the individual flow guide plates 6. The individual flow guide plates 6 are identically designed and are placed on top of one another, each rotated by 180°. As a result, the spacers 17 also lie in offset positions on the respective lower flow guide plate 6.

[0074] The representation of the Fig. Figure 8 shows a flow guide plate 6 according to a further embodiment of the invention. The flow guide plate 6 has a saddle-like shape, with only flat surfaces 19 and straight edges 20 between the individual sections 19. Viewed from the top of the container 1, the flow guide plate 6 of the Fig. 8 a concave shape. The sediment can therefore flow in the direction of the Fig. 8 arrows shown on the flow guide plate 6, whereby it is guided in the direction of the edge 20. The flow guide plate 6 of the Fig. 8 has a significantly increased strength compared to a flat flow guide plate.

[0075] The representation of the Fig. Figure 9 shows a flow guide plate 6 according to another embodiment of the invention with a saddle-like shape. The saddle-like shape, or rather the concave curvature, of the flow guide plate 6 is formed here by three flat sections 19, which are connected to one another by straight edges.

[0076] The representation of the Fig. 10 shows a further flow guide plate 6 according to a further embodiment. The flow guide plate 6 of Fig. 10 has a saddle-like shape composed of individual flat sections 19. However, the sections 19 are each provided with one or more beads or ribs 16 arranged parallel to the preferred direction of the sliding sediment.

[0077] The representation of the Fig. 11 shows a flow guide plate 6 according to a further embodiment of the invention. The flow guide plate 6 of Fig. 11 has a saddle-like shape, this saddle-like shape being composed of two concavely curved halves 18 which are connected to each other by means of a likewise concavely curved edge.

[0078] The representation of the Fig. 12 shows a flow guide plate 6 according to a further embodiment of the invention, wherein the shape of the flow guide plate 6 corresponds to the shape of the flow guide plate of the Fig. 11, but in addition ribs or beads 16 are introduced parallel to a preferred direction of the sediment during sliding.

[0079] Fig. Figure 14 shows a package 7 according to another embodiment of the invention. The individual flow guide plates 6 are each designed in the shape of a gable roof and consist of two equally sized, flat halves 28, which are pivotally connected to one another in the region of a ridge edge by means of a hinge 27. Each individual flow guide plate can thus perform a movement around the hinges 27, which overall resembles the movement of a butterfly's wing.

[0080] In the area of ​​the two opposite outer edges, the flow guide plates 6 are each pivotably connected to a rod 29, which at the same time ensures that the spaces 5 between the individual flow guide plates are equal, i.e. that the individual sections 28 of the flow guide plates are held parallel to one another.

[0081] In the Fig. In the state shown in Figure 14, the flow guide plates 6 are flowed through transversely in the direction of the two arrows and deposited sediment can then slide off the side of the flow guide plates 6 in the direction of the two solid arrows.

[0082] In a cleaning process, the flow guide plates 6 can then be moved relative to each other, as in Fig. 15. For this purpose, a crossbar, to which the two rods 29 are articulated, is moved up and down along the guide rod 15, as shown by an arrow in Fig. 15. The ridge edges of the flow guide plates 6 and the hinges 27 remain stationary. Only the rod 29 and thus the outer edges of the flat sections 28 of the individual flow guide plates 6 are thereby moved towards the bottom of the container, see Fig. 15, and up again, see Fig. 14. This also creates a sloshing movement between the flow guide plates 6 in the spaces 5, which then leads to a detachment of sediment and thus to a cleaning of the flow guide plates 6.

[0083] The Fig. 14 and Fig. The movement of the flow guide plates 6 relative to one another shown in Fig. 15 can also be supported, for example, by a rotational movement of the entire package about an axis of rotation coinciding with the rod 15.

[0084] The representation of the Fig. 16 shows in isometric view the distribution plate 4 of the device of Fig. 1. The distribution plate 4 is, see Fig. 1, located in front of the package 7 in the direction of flow. The distribution plate 4 has three elongated openings arranged parallel to the vertical axis of the container and widening downwards. The water inlet 2, see Fig. 1 and Fig. 2, is located approximately at the height of the center of the distribution plate 4. With the distribution plate 4 and in particular through the openings in the distribution plate 4 which widen towards the bottom of the container, a uniform flow through the flow guide plates of the package 7 can be achieved.

[0085] The representation of the Fig. Figure 17 shows a flow guide plate according to a further embodiment of the invention. The flow guide plate is conical, and it is intended to construct a package of several conical flow guide plates. This package of several conical flow guide plates 40 arranged one above the other is, like the package 7 in Fig.1, is inserted into the container. Sediment can then slide off the individual conical guide plates 40 in the direction of the arrows 42. Sediment will thus sink downwards over the entire circumference of the flow guide plates 40 towards the bottom of the container. The flow guide plates 40 each have several ascent openings 40 for light liquids in the region of their upper end. The flow guide plates 40 are firmly connected to a central rod 44 in the region of their upper end. By means of the rod 44, the package of several flow guide plates 40 can then either be rotated about the longitudinal axis of the rod 44 and / or lifted by means of the rod 44.

Claims

[1] A device for cleaning water contaminated with sediment and light liquids, comprising a cylindrical or cubic container (1), a water inlet (2) into the container (1), a water outlet (10) from the container (1), the water inlet and the water outlet being arranged substantially radially to a vertical axis of the container, which extends between a bottom and the top of the container, a collecting space for sediment (12) in the region of the bottom of the container (1), and a plurality of flow guide plates which form a plurality of parallel flow paths between them and which are connected to one another to form a package, means being provided for moving the flow guide plates relative to the container (1) during a cleaning operation, characterized bythat the package is rotatably arranged in the container, with an axis of rotation arranged parallel to the vertical axis of the container, that the package is movable in and against the direction of the vertical axis of the container, that the package of the plurality of flow guide plates has a circular-cylindrical shape or the shape of a prism with the base of a polygon, in particular a rectangle, hexagon, or octagon, that the container is provided with distribution devices to guide the flow within the container, wherein the distribution devices have guide plates arranged parallel to the vertical axis of the container, that the guide plates, when the package has a circular-cylindrical shape, rest loosely in sections on the circumference of the package of several flow guide plates, or that when the package has the shape of a prism with the base of a polygon, there is a gap between the edges of the guide plates and the circumference of the package,which allows the package to rotate. [2] Device according to claim 1, characterized by that the distribution devices are designed to provide at least a first section of the container through which there is no flow or only a slight flow, said first section, viewed perpendicular to the vertical axis of the container, laterally adjoining the package with the flow guide plates. [3] Device according to claim 2, characterized by that the distribution devices consist of an inlet distribution device and an outlet distribution device. [4] Device according to claim 3, characterized by that the inlet distribution device and / or the outlet distribution device is provided with at least one guide plate arranged parallel to the vertical axis of the container. [5] Device according to claim 4, characterized bythat the at least one guide plate of the inlet distribution device and / or the outlet distribution device each has a side edge running parallel to the vertical axis of the container, which is arranged directly adjacent to the circumference of the package or rests against the circumference of the package. [6] Device according to claim 5, characterized by that several guide vanes arranged parallel to each other are provided. [7] Device according to at least one of claims 1 to 6, characterized by that the distribution devices are designed to provide at least a second section of the container through which there is no flow or only a slight flow in the region of the bottom of the container as a collecting space for sediment. [8] Device according to claim 7, characterized bythat the at least one guide plate arranged parallel to the vertical axis of the container ends above the bottom of the container and the collecting space for sediment is formed between the bottom of the container and the guide plate. [9] Device according to at least one of the preceding claims, characterized by that within the container in front of the water outlet there is a baffle arranged transversely to the flow direction in the outlet to retain light liquids within the container. [10] Device according to at least one of the preceding claims, characterized by that the flow guide plates each have two sections arranged at an angle of less than 180 degrees to each other, which are connected to each other in the region of a ridge edge. [11] Device according to claim 10, characterized by that the flow guide plates are each saddle-shaped. [12] Device according to claims 1 to 10, characterized bythat the flow guide plates are each flat. [13] Device according to at least one of the preceding claims, characterized by that the flow guide plates have beads or ribs which extend essentially along imaginary planes arranged parallel to the vertical axis of the container. [14] Device according to at least one of the preceding claims, characterized by that the package of flow guide plates can be removed from the container in the direction of the vertical axis.

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