EP3787767A1

EP3787767A1 - Sedimentation device

Info

Publication number: EP3787767A1
Application number: EP20703744.1A
Authority: EP
Inventors: Jorge Torras-Piqué
Original assignee: H2O Research GmbH; 3P Technik Filtersysteme GmbH; H2O RES GmbH
Current assignee: 3P Technik Filtersysteme GmbH
Priority date: 2019-03-07
Filing date: 2020-02-05
Publication date: 2021-03-10
Also published as: DE102019203116A1; WO2020177966A1; AU2020230787A1; US20200282339A1; US11167224B2; BR112020025554A2

Abstract

A sedimentation device for material contained in liquid, in particular in precipitation water, is proposed, comprising a sedimentation insert (12), which, in the usage position, is inserted into a shaft element (13), wherein: the sedimentation insert (12) has an inflow chamber (18), which is delimited by an inflow-chamber side wall (20) equipped with a lateral inflow opening (19) and has an outlet opening (23) on the underside of the inflow chamber; a flow-breaking device (24) for breaking a liquid flow produced in a through-flow direction (26) between the inflow opening (19) and an outflow opening (25) is associated with the outlet opening (23); the sedimentation insert has an outflow chamber (32), which annularly surrounds the inflow chamber and is delimited by an inner outflow-chamber side wall, a bottom (33) and an outer outflow-chamber side wall (34); the outflow opening (25) is formed at the boundary of the outflow chamber (32); and the outer outflow-chamber side wall (34) is designed as a spillover element (38).

Description

3P Technik Filtersysteme GmbH, 73337 Bad Überkingen and H2O Research GmbH, 48155 Münster

Sedimentation device

The invention relates to a sedimentation device for material contained in liquid, in particular rainwater.

Such sedimentation devices have been known for a long time. An important area of application of such sedimentation facilities is the separation of material from rainwater, especially dirt, dust, dirt, etc. that are swept along in a rain event. In rainwater retention systems filled after heavy rainfall, there is a need to divert the accumulated rainwater. Discharging the rainwater that has been viewed without the interposition of a sedimentation device into the sewer system or for the purpose of seepage is problematic.

A sedimentation device in the form of a hydrodynamic treatment device is described, for example, in EP 1 651 325 B1. The treatment device disclosed there has a cylindrical outer wall, on the jacket surface of which an inlet for liquid is formed. The inlet leads into a storage space, which in turn opens into an outer separation chamber. On the underside of the outer separation chamber there is a funnel-shaped base element with a central opening through which the outer separation chamber chamber is connected to a sedimentation space or sump. The outer separation chamber is penetrated by an inner separation chamber, which also has a cylindrical chamber wall. In the outer surface of this chamber wall, inlet openings are formed into which liquid, in particular water, can flow from the outside to the inside into the inner separation chamber. The inner separation chamber is closed at the bottom, so that after entering the inner separation chamber, liquid rises and reaches an outlet also formed on the outer surface of the chamber wall and flows from there out of the treatment device. The flow through the treatment device thus takes place from the outside to the inside, the flow initially being directed downwards over the sump and from there directed upwards again.

EP 2 957 683 B1 describes a wastewater treatment arrangement which has a shaft in which a pair of annular spaces is received with an annular space that is upper in the vertical direction of the shaft and a lower annular space. The sewage treatment arrangement is flowed through in the upstream, i.e. on the outer surface of the shaft there is an inlet and an outlet located higher than that, with several pairs of annular spaces being received in the shaft interior and flowed through in the upstream so that suspended matter or suspended matter in the water or in the liquid Sediments are retained.

The object of the invention is to create a sedimentation device which is simple in construction and inexpensive and with which a high throughput of liquid to be cleaned is possible. This object is achieved by a sedimentation device with the features of independent claim 1. Developments of the invention are presented in the subclaims.

The sedimentation device according to the invention for material contained in liquid, in particular rainwater, has a sedimentation insert which, when in use, is inserted into a shaft element, the sedimentation insert having an inlet chamber, which is provided with an inlet chamber equipped with an inlet opening on the side. Side wall is delimited and has an outlet opening on its underside, the outlet opening being assigned a flow breaker device for breaking a flow of a liquid flow generated between the inlet opening and an outlet opening in a flow direction, and wherein the sedimentation insert has an outlet chamber that surrounds the inlet chamber in a ring shape a bottom and an outer discharge chamber side wall are delimited by an inner discharge chamber side wall, the discharge opening being formed on the boundary of the discharge chamber, and the outer discharge chamber-Se itenwand is designed as a raid.

In this case, the flow takes place from the inside to the outside and from there via an overflow to the outlet opening. In the position of use of the sedimentation device, the annular space between the shaft wall and the Sedimentationsein rate form an outer chamber, while the interior of the Sedi mentation insert can form the inner chamber, which is flown against the next before the liquid enters the outer chamber. It is not necessary to adapt the shaft elements to the sedimentation insert, that is to say the sedimentation insert can be easily inserted into a shaft element. Liquid therefore runs into the first An inlet chamber which is designed in such a way that a liquid flow is generated that enables a high throughput through the sedimentation insert. However, the liquid flow is broken by the flow breaker device, which prevents deposited sediments from being whirled up again. The liquid that rises after passing the outlet opening is largely free of sediments and then passes through the overflow to the outlet opening. In a particularly preferred manner, the inlet chamber side wall is cylindrical.

In a particularly preferred manner, the inlet chamber has an inlet section assigned to the inlet opening and an outlet section assigned to the outlet opening downstream of the inlet section in the flow direction.

The outlet section is expediently designed in the shape of a funnel.

In a further development of the invention, the inner outlet chamber side wall is formed by the inlet chamber side wall. Alternatively, however, it would also be conceivable for the outlet chamber to have an inner outlet chamber side wall which is formed separately from the inlet chamber side wall.

In a particularly preferred manner, a flow guiding element is arranged in the flow direction after the inlet opening in the inlet chamber in such a way that inflowing liquid can be set in a tangential flow. The flow guide element can be used, for example, as a deviation lying in the flow path of the liquid flowing in through the inlet opening. ser, in particular in the form of a deflector plate.

In a further development of the invention, the overflow is designed as a weir. In a particularly preferred manner, the weir is formed as a prong, with a plurality of prongs forming the upper edge of the outer discharge chamber side wall in the circumferential direction of the outer discharge chamber side wall.

The prongs expediently have the shape of isosceles triangles. However, other overflow cross-sections, in particular other triangular geometries, can also be used. It is essential that a uniform overflow over the weir is possible, even if the weir is not aligned exactly horizontally. In a further development of the invention, the flow breaker has at least one, in particular a plurality of flow breaker elements transverse to the flow direction. The decisive factor here is that a tangential flow prevailing in the inlet chamber is broken by means of the flow breaker elements so that the sump or sedimentation space below the inlet chamber is free from a turbulent flow, which prevents sediments from being swirled up.

In a particularly preferred manner, the flow breaker elements are connected downstream of the outlet opening in the direction of flow.

Appropriately, the flow breaker elements are sword-like. In a particularly preferred manner, the flow breaker elements form a stand on which the sedimentation insert is in the position of use in the shaft element.

In a further development of the invention, the flow breaker device has a grid which is preferably arranged in or below the outlet opening.

The discharge opening is expediently arranged on the outer discharge chamber side wall.

In a particularly preferred manner, the outlet opening is adjustable in height. This makes it possible to compensate for a height difference between a drain opening formed on the shaft element and the drain opening of the sedimentation insert. The height adjustment can be carried out, for example, by a height-adjustable slide with a diaphragm opening.

In a particularly preferred manner, the Sedimentationsein set consists of plastic. For example, the sedimentation insert can be a plastic part produced by means of rotational molding. A preferred embodiment is shown in the drawing and is explained in more detail below. In the drawing show:

Figure 1 is a longitudinal section through a preferred embodiment

example of the sedimentation device according to the invention,

FIG. 2 is a perspective top view of the sedimentation device from FIG. 1, FIG. 3 shows a perspective view of the sedimentation insert of the sedimentation device from FIG. 1,

FIG. 4 shows a perspective view of the sedimentation insert from FIG. 1 from a different direction compared to FIG.

FIG. 5 shows a side view of the sedimentation insert from FIG. 3 and FIG

6 shows a side view of the sedimentation insert of FIG. 3 rotated by 90 ° with respect to FIG. 3. FIGS. 1 to 6 show a preferred embodiment of the sedimentation device 11 according to the invention. The sedimentation device 11 is shown below by way of example when it is used to separate material contained in rainwater, in particular Sediments in the form of

Described dirt particles. In principle, it would also be possible to treat liquids other than water with the sedimentation device 11, but the main area of application is the treatment of rainwater, in particular rainwater. In the example described, the sedimentation device 11 can for example be upstream or downstream of a rainwater retention basin or be arranged in the rainwater retention basin, so that rainwater accumulated in the rainwater retention basin can be drained off via the sedimentation device. An untreated derivative of pent-up

Rainwater, for example, from a rainwater retention basin into the sewer system, into a body of water or for the purpose of seepage is not permitted according to the legislature's separation decree more permissible, so that there is a need to treat such dammed rainwater.

The use of the sedimentation device 11 according to the invention is not coupled to a rainwater retention basin, but the sedimentation device 11 can be used wherever rainwater is discharged into the sewer system, into a body of water or for seepage.

As shown in particular in FIG. 1, the sedimentation device 11 has a sedimentation insert 12 which is inserted into a box element 13 in the position of use. The shaft element 13 shown by way of example in FIG. 1 usually consists of concrete material and is buried in the ground. The shaft element 13 has a shaft casing 14 which is open on the top and is closed on the bottom by a shaft bottom 15. The lower part of the shaft element 13 and the shaft bottom 15 together form a sump or Se dimentsammelraum. The shaft jacket 14 expediently has a cylindrical shape.

Because the shaft element 13 is open at the top, the sedimentation insert 12 can be inserted into the shaft element 13 from above in a simple manner. As shown in particular in FIG. 1, the manhole element 13 on the manhole jacket 14 has a manhole inlet opening 16 and a manhole outlet opening 17 arranged diametrically with respect to a manhole element longitudinal axis of this opposite to the manhole jacket 14.

In contrast to the Schachtele element 13, the sedimentation insert 12 is expediently a plastic component. The sedimentation insert 12 can be made, for example, by plastic rotational molding. The sedimentation insert 12 has an inlet chamber 18, which is delimited by an inlet chamber side wall 20 equipped with a lateral inlet opening 19.

As shown in FIGS. 1 and 2, the inlet opening 19 of the inlet chamber 18 is connected to the shaft inlet opening 16 via an inlet pipe 21, the inlet pipe 21 protruding beyond the outside of the shaft casing 14.

The inlet chamber 18 has an inlet section 22 assigned to the inlet opening 19. The inlet section 22 is delimited by a cylindrical part of the inlet chamber side wall 20.

The inlet chamber 18 has an outlet opening 23 on its underside, with the outlet opening 23 being assigned a flow breaker device for the flow breaking of a liquid flow generated between the inlet opening 19 and an outlet opening 24 in a flow direction 25.

The inlet chamber 18 has an outlet section 27, which is connected downstream of the inlet section 22 of the inlet chamber 18 in the flow direction 26, is assigned to the outlet opening 23 and is designed in the form of a funnel in the example. The outlet section 27 expediently forms a hydrodynamic separator. The outlet opening 23 is located on the underside of the outlet section 27. As can be seen in particular in FIG. 2, a flow guide element 28 in the form of a deflector is arranged in the flow direction 26 after the inlet opening 19 in the inlet chamber 18 in such a way that inflowing water in a tangential flow is displaced. In the example shown the flow guide element 28 in the form of the deflector is designed as an angle profile, which is expediently connected in one piece to the inlet chamber side wall 20. The deflector has a vertical leg 29, which, as shown in Figure 2, runs in the vertical direction of the inlet chamber 18 and is inclined relative to the mouth surface of the inlet opening 19 in such a way that inflowing water from the inner wall of the vertical leg 29 serving as a guide surface 30 bounces off and in the direction of the inner wall of the inlet - chamber side wall 20 is guided, where a tangential flow is then generated. The vertical limb 29 is connected in one piece to a horizontal limb 31 which is connected at an angle to the vertical limb 29 and is also connected in one piece to the inlet chamber side wall 20. As shown in FIGS. 3 and 4 in particular, the sedimentation insert 12 has an outlet chamber 32 which surrounds the inlet chamber 18 in a ring shape and is delimited by an inner outlet chamber side wall, a bottom 33 and an outer outlet chamber side wall 34. As shown in particular in Figures 3 and 4, the inner outlet chamber side wall is formed in the example by the inlet chamber side wall.

The bottom of the outlet chamber 32 and the outer outlet chamber side wall 34 are integrally connected to the inlet chamber side wall 20. As shown in particular in Figure 2, the outlet opening 25 is located at the limit of the

Outlet chamber 32, in particular on the outer outlet chamber side wall 34.

As especially the synopsis of FIGS. 3 and 4 shows, the outlet opening 25 is adjustable in height. The height adjustability is achieved in that the outlet opening 25 is part of a slide 35, the height is adjustable on a slide guide 36 on the outer run chamber side wall 34 from.

As shown in particular in FIGS. 1 and 2, the outlet opening 25 is connected to the shaft outlet opening 17 via an outlet pipe 37. The height adjustment of the outlet opening 25, in particular by means of the slide 35, serves to compensate for a difference in height between the outlet opening 25 and the shaft outlet opening 17.

As shown in particular in FIG. 2 and also in FIGS. 3 to 6, the outer discharge chamber side wall 34 is designed as an overfall 38. The overflow 38 is designed as a weir in the example, expediently as a serrated weir. The weir has a row of prongs 39 forming the upper edge of the outer discharge chamber side wall 34 with a plurality of prongs 40 arranged in the circumferential direction, in particular at a uniform distance from one another. The prongs 40, which can also be referred to as teeth, have the shape in the example isosceles triangles. Thus, triangular overflow cross-sections 41, in particular the shape of isosceles triangles, are formed between adjacent prongs 40. The triangular overflow cross-sections 41 enable a uniform overflow of water which flows into the outlet chamber from the outside, overflowing the serrated weir. As shown in particular in FIGS. 3 and 4, the sedimentation insert 12 is equipped with a flow breaker device 24. The flow breaker device 24 is assigned to the outlet opening 23 and serves to break the flow of the turbulent tangential flow in the inlet chamber. The purpose of this is that material deposited on the shaft bottom 15 is not whirled up again. The stream flow breaker device 24 has a plurality of flow breaker elements 42a-c standing transversely to the flow direction. As shown in particular in FIGS. 3 and 4, the flow breaker elements 42a-c are connected downstream of the outlet opening 23 in the flow direction 26, that is, they are located below the inlet chamber 18.

The flow breaker elements 42a-c are sword-like in the example and are shown in the example in the form of three plate-like flow breaker elements 42a-c arranged in a star shape at regular intervals from one another. The flow breaker elements 42a-c are integrally connected to one another and together form a stand 43 for the inlet and outlet chambers 18, 32 located above. For example, it is possible that the lower edge of the inlet chamber side wall 20 sits on the stand 43. As already mentioned, it is essential that the flow breaker elements are perpendicular to the direction of flow.

In the example shown, a tangential flow arises in the inlet chamber, which flow is broken by the flow breaker elements aligned transversely thereto, which are aligned in the vertical direction.

As shown in particular in FIG. 3, on the underside of the stand 43 there are height-adjustable feet 44, namely on at least two of the three flow breaker elements. This makes it possible to adjust the installation position of the sedimentation insert 12.

As also shown in FIGS. 3 and 4, stiffening webs 45 are arranged between each two adjacent flow breaker elements 42, which give the stand 43 sufficient stability. The flow breaker device 24 also has a grid 46, which is arranged slightly below the outlet opening 23 in the example shown. The grid 46 also serves to break the turbulent tangential flow in the inlet chamber 18.

During operation, rainwater contaminated with sediments flows into the inlet chamber 18 via the inlet pipe 21 and the inlet opening 19. In the process, the rainwater flowing in hits the flow guide element 28 in the form of the deflector and is directed towards the inner wall of the inlet chamber 18. A tangential flow is created which ensures that a relatively high speed and thus a high throughput is created within the inlet chamber 18. What water flows in the inlet chamber 18 down and enters the funnel-shaped outlet chamber 32, where it then over the

Exit opening 23 emerges into the interior of the shaft element 13. The flow breaker device 24 with the two plate-like flow breaker elements 42 ensures that the flow is calm, that is, the breaking of the tangential flow. Sediments that were washed away settle at the bottom of the shaft 15. The flow breaker elements 42, which are arranged in a star shape, prevent a tangential flow at the shaft bottom 15.

The rainwater now rises inside the box element 13 and overflows over the overflow 38 in the form of the serrated weir. The rainwater flowing over is essentially free of the sediments deposited on the shaft bottom 15. The rainwater reaches the outlet chamber 32 via the serrated weir, from where it can only flow off via the outlet opening 25. The precipitation water purified in this way then flows off via the outlet opening 25 and from there it can be discharged into the sewer system, into a body of water or to infiltration.

Claims

Expectations

1. Sedimentation device for in liquid, insbesonde re rainwater, contained material, with a Sedi mentation insert (12) which is used in the position of use in a chess telement (13), wherein the sedimentation insert (12) has an inlet chamber (18) through an inlet chamber side wall (20) equipped with a lateral inlet opening (19) is delimited and has an outlet opening (23) on its underside, the outlet opening (23) having a flow breaker device (24) for breaking the flow between the inlet opening (19) and an outflow opening (25) in a flow direction (26) generated liquid flow is assigned, and wherein the sedimentation insert has an outflow chamber (32) which surrounds the inflow chamber (18) in an annular shape and which is formed by an inner outflow chamber side wall, a bottom (33) and an outer discharge chamber side wall (34) is limited, wherein at the boundary of the discharge chamber (32) the Outlet opening (25) is formed from, and wherein the outer outlet chamber side wall (34) is designed as an overflow (38).

2. Sedimentation device according to claim 1, characterized in that the inlet chamber side wall (20) is formed cylindrically.

3. Sedimentation device according to claim 1 or 2, characterized in that the inlet chamber (18) one of the inlet The inlet section (22) assigned to the flow opening and an outlet section (27) assigned to the outlet opening (23) downstream of the inlet section (22) in the direction of flow (26), the outlet section (27) preferably being funnel-shaped.

4. Sedimentation device according to one of the preceding claims, characterized in that the inner outlet chamber side wall of the inlet chamber side wall (20) forms GE.

5. Sedimentation device according to one of the preceding claims, characterized in that in the flow direction (26) after the inlet opening (19) in the inlet chamber (18) a flow guiding element (28) is arranged in such a way that inflowing liquid is transformed into a tangential flow. is settable.

6. Sedimentation device according to one of the preceding claims, characterized in that the overflow (38) is designed as a weir, preferably the weir is designed as a serrated weir, with a plurality in the circumferential direction of the outer discharge chamber side wall (34), the upper edge of the outer Spout chamber side wall (34) forming prongs (40).

7. Sedimentation device according to claim 6, characterized in that the prongs (40) have the shape of isosceles triangles.

8. Sedimentation device according to one of the preceding

Claims, characterized in that the flow breaker device (24) has at least one, in particular several flow breaker elements (42a-c) standing transversely to the flow direction.

9. Sedimentation device according to claim 8, characterized in that the flow breaker elements (42a-c) are switched nachge in the flow direction (26) of the outlet opening (23).

10. Sedimentation device according to claim 8 or 9, characterized in that the flow breaker elements (42a-c) are sword-like.

11. Sedimentation device according to one of claims 8 to

10, characterized in that the flow breaker elements (42a-c) form a stand (43) on which the sedimentation insert (12) stands in the position of use in the shaft element (13).

12. Sedimentation device according to one of the preceding claims, characterized in that the flow breaker device (24) has a grid (46) which is preferably arranged in the outlet opening or below the outlet opening.

13. Sedimentation device according to one of the preceding claims, characterized in that the outlet opening (25) is arranged on the outer outlet chamber side wall (34), the outlet opening (25) preferably being adjustable in height.

14. Sedimentation device according to one of the preceding claims, characterized in that the sedimentation insert (12) consists of plastic.

15. Sedimentation device according to one of the preceding claims, characterized by a shaft element (13).