Inlet module and sedimentation system

Abstract

Inlet module (10) for a sedimentation plant, which inlet module comprises a pipe section (11) and at least one inlet device through which a liquid can be introduced into the pipe section (11), wherein the pipe section (11) has a first, closable end (11a) in the axial direction, which is spaced from the inlet device in the axial direction by an offset length (A), and a second, open end (11b) which is designed for connection to another module (20, 30) of the sedimentation plant, wherein the inlet device has an inlet nozzle (16) which projects into the interior of the pipe section (11) of the inlet module (10), characterized by the fact that the offset length (A) is dimensioned such that a circulation space (19) is formed between the inlet device and the closable axial end (11a) of the pipe section (11), in which the liquid introduced into the inlet module (10) by the inlet device can circulate before being directed towards the open end (11b) of the pipe section (11) of the inlet module (10), the inlet nozzle (16) opens towards the circulation space (19).

Description

Technical field

[0001] The invention relates to a sedimentation plant and an inlet module for a sedimentation plant.

[0002] Sedimentation systems are designed to allow undissolved pollutants of varying densities to settle out of liquids. Besides density, particle size is also crucial for the behavior of the particles within the sedimentation system.

[0003] Sedimentation tanks take the form of a settling basin or consist of a pipe system. They can be connected, for example, between a rainwater drain from road surfaces and an infiltration system, and then serve to protect the infiltration system from contamination and blockage caused by settleable solids when rainwater is discharged. State of the art

[0004] A sedimentation plant of this type is known from DE 20 2005 014 237 U1. It comprises a sedimentation body, preferably to be laid underground, which defines a settling chamber; at least one inlet device through which a liquid can be introduced into the settling chamber; and at least one outlet device through which the liquid can be discharged from the settling chamber. The sedimentation plant can be modularly constructed and then subdivided into an inlet module, optionally at least one linear module, and an outlet module, wherein the inlet module comprises the inlet device and the outlet module the outlet device.

[0005] DE 20 2007 011 126 U1 relates to a sedimentation plant for settling settleable substances contained in liquids, comprising a sedimentation body, preferably to be laid underground, which defines a settling chamber, at least one inlet device through which a liquid can be introduced into the settling chamber, and at least one outlet device through which the liquid can be discharged from the settling chamber.

[0006] DE 20 2005 019 643 U1 relates to a sampling device for liquids containing suspended and / or sinking solids.

[0007] From WO 98 / 38 134 A1, a closed, chemically assisted wastewater treatment system is known in which the water flows through a settling pipe into a settling tank. A U-shaped inlet is installed at a distance from the closed end of the settling pipe facing away from the settling tank. The water is to be introduced into the settling pipe as gently and without turbulence as possible through this inlet and flows towards the settling tank.

[0008] Publications WO 2005 / 085 696 A1, US 2 795 240 A and US 7 459 090 B1 also represent the state of the art. Description of the invention

[0009] The present invention is based on the objective of creating a sedimentation plant and an inlet module for a sedimentation plant with improved cleaning performance.

[0010] This task is solved, firstly, with an inlet module according to claim 1.

[0011] This inlet module comprises a pipe section and at least one inlet device through which a liquid can be introduced into the pipe section. The pipe section has a first, closable end axially spaced from the inlet device by an offset length, and a second, open end configured for connection to another module of the sedimentation system. This second module can be, in particular, a line module or an outlet module of the sedimentation system. In conventional sedimentation systems, this offset length is quite short. According to the invention, however, it is dimensioned such that a circulation space is formed between the inlet device and the closable axial end of the pipe section of the inlet module, in which the liquid introduced into the inlet module by the inlet device can circulate before being directed towards the open end of the pipe section of the inlet module.

[0012] The inlet device has an inlet nozzle that protrudes into the interior of the pipe section of the inlet module. The inlet nozzle opens towards the circulation space.

[0013] The liquid flowing in through the inlet device, e.g., rainwater, therefore initially flows into the circulation chamber, which is formed in the inlet module according to the invention in the area between the inlet nozzle and the sealed end of the pipe section. The circulation chamber is formed by appropriately dimensioning the offset length by which the first sealable end of the pipe section is axially spaced from the inlet device. The first sealable end of the pipe section of the inlet module seals the sedimentation system axially in the assembled or installed state.

[0014] At the closed end of the pipe section, the liquid is deflected and only then flows in the opposite direction, i.e. through the free end of the inlet module and, in the installed state, continues towards an outlet module with a drain device.

[0015] This circular movement of the liquid within the recirculation chamber, initially running counter to the actual flow direction from inlet to outlet, lengthens the flow path and thus the transit time of the liquid compared to an inlet module where the liquid would flow directly from the inlet towards the outlet. Simultaneously, the flow velocity of the liquid in the sedimentation system is reduced. Strong turbulence can be avoided, and a flow with a greater laminar component can be generated.

[0016] These effects are achieved with the inlet module design according to the invention, without changing the length of the sedimentation system between the inlet and the outlet. Instead, the recirculation chamber extends the pipe run from the inlet nozzle, for example, in the opposite direction to the outlet nozzle. The direction of extension of the recirculation chamber does not necessarily have to coincide with the direction of extension of the pipe run.

[0017] Optional features of the inlet module according to the invention are set out in the associated dependent claims.

[0018] If the offset length in the axial direction of the pipe section is determined from a central axis of the inlet device to the closable axial end of the pipe section of the inlet module, it is preferably at least equal to the inner diameter of the pipe section of the inlet module. With an offset length of this magnitude, a noticeable improvement in cleaning performance is already achieved, while otherwise maintaining the same dimensions of the sedimentation system.

[0019] The cleaning performance is further improved if the offset length determined in this way is at least equal to 1.5 times, or better yet at least equal to 1.75 times, the inner diameter of the pipe section of the inlet module.

[0020] In principle, there is no upper limit to the offset length. However, to prevent the inlet module from becoming too unwieldy, the offset length determined as above should preferably be no more than 2.5 times, better yet no more than 2.25 times, and even better no more than twice the inner diameter of the pipe section of the inlet module.

[0021] The inlet nozzle can have a longitudinal axis that runs essentially perpendicular to a longitudinal axis of the pipe section of the inlet module.

[0022] The end of the inlet nozzle projecting into the interior of the pipe section is preferably beveled at an angle to the longitudinal axis of the inlet nozzle, an angle preferably between 5 and 35 degrees, and more preferably about 20 degrees. This allows the inlet opening, through which the liquid enters the settling chamber, to have an oval outline. This bevel is designed so that the inlet nozzle opens towards the settling chamber. Due to the bevel, the inlet opening is directed not only downwards towards the bottom of the pipe section, but also to a certain extent towards the first, closable end of the pipe section.

[0023] Alternatively or additionally, the end of the inlet nozzle projecting into the interior of the pipe section can be provided in its area facing away from the closable end of the pipe section with an extension attached at an angle, which angle is preferably between 15 and 55 degrees, more preferably about 40 degrees to the longitudinal axis of the inlet nozzle (which can run essentially vertically in the installed state).

[0024] This angled and / or angled extension design of the inlet nozzle's outlet ensures that the inlet opening faces both the closed end of the inlet nozzle and the bottom of the pipe section of the inlet module. This prevents all rainwater entering the settling chamber via the inlet nozzle from impacting the bottom of the pipe section vertically. Instead, the rainwater is given a downward, oblique motion. Therefore, an advantageous effect is achieved even without the presence of a circulation chamber. The angled design and / or extension complement the circulation chamber according to the invention in that the circulation chamber provides the rainwater with the necessary space to flow in the direction already predetermined by the extension and / or angled design and subsequently be redirected.

[0025] The above-mentioned problem is solved, secondly, with a sedimentation plant according to claim 8.

[0026] This sedimentation system comprises a pipe section formed by at least one pipe segment; an inlet device through which a liquid can be introduced into the pipe section; and an outlet device through which the liquid can be discharged from the pipe section. The pipe section has a first and a second end in the axial direction, the first end of the pipe section being offset from the inlet device in the axial direction and from the outlet device by a certain offset length. When installed, the first axial end closes off the sedimentation system in the axial direction. Similar to the inlet module according to the invention, the offset length is dimensioned such that a circulation space is formed between the inlet device and the closable axial end of the pipe section, in which the liquid introduced into the inlet module by the inlet device can circulate before being directed towards the outlet device.

[0027] The sedimentation system can be modular in design and then comprises at least one inlet module, at least one outlet module, and optionally at least one connecting module between the inlet and outlet modules, wherein the inlet device is part of the inlet module and the outlet device is part of the outlet module. A modular design has the advantage that the system can be easily adapted to individual needs. Furthermore, individual modules can be easily transported and relocated. However, the invention also includes sedimentation systems constructed as single units.

[0028] Furthermore, the same advantageous developments can be implemented in the sedimentation plant according to the invention as in the inlet module according to the invention. Corresponding features are described in the associated dependent claims. Brief description of the drawings Fig. Figure 1 shows an inlet module according to the invention for a sedimentation plant in longitudinal section. Fig. Figure 2 shows a sedimentation plant according to the invention with the inlet module made of Fig. 1 in longitudinal section. Fig. Figure 3 shows a sedimentation plant without a circulation chamber in longitudinal section for comparison purposes. Detailed description of an embodiment of the invention

[0029] The Fig. Figure 2 shows an embodiment of a sedimentation plant according to the invention.

[0030] In the embodiment of the invention presented here, the sedimentation system has a modular design, allowing it to be easily adapted to individual needs. Furthermore, individual modules can be easily transported and relocated.

[0031] The system comprises, in particular, an inlet module 10, a channel module 20, and an outlet module 30. Modules 10, 20, and 30 are connected to each other by means of couplings 18. Depending on the desired length of the sedimentation system, modules, especially channel modules 20, of different lengths can be used, and several channel modules 20 can also be provided between the inlet module 10 and the outlet module 30. In this case, the different channel modules 20 can also be coupled to each other via couplings. If a particularly short construction length is desired, the channel modules 20 can be omitted, and the outlet module 30 can be directly connected to the inlet module 10. Depending on the number and length of the channel modules 20 used, the total length of the sedimentation system varies, often ranging between three and twelve meters (corresponding to the construction lengths common in the prior art, for example, three, six, or nine meters).

[0032] The inlet module 10 comprises a pipe section 11, which in the present embodiment is essentially cylindrical, and an inlet device, which here is provided in the form of an inlet nozzle 16. The pipe section 10 has, in the axial direction, a first, closable end 11a, which is spaced axially from the inlet device 16 by an offset length A, and a second, open end 11b, which is designed for connection to another module – here a linear module 20 – of the sedimentation system.

[0033] The track module 20 comprises a pipe section 21, the cross-section of which essentially corresponds to that of the pipe section 11 of the inlet module 10, so that the pipe sections 11, 21 can be coupled.

[0034] The drainage module 30 comprises a pipe section 31 also designed with a suitable cross-section and a drainage device, here a drainage nozzle 36, through which the liquid can be discharged from the drainage module 30.

[0035] The pipe sections 11, 21, and 31 of the individual modules together form a pipe section of the sedimentation system. A settling chamber 50 is defined within the pipe section. When the sedimentation system is installed as intended, the bottom of the pipe section, and thus of the settling chamber 50, runs essentially horizontally and preferably parallel to the ground. A liquid—in this specific application, for example, rainwater—can be introduced into the settling chamber 50 through the inlet device, in this case the inlet nozzle 16.

[0036] The opposite axial ends of the pipe section, i.e. in the present case the outer axial end 11a of the inlet module 10 and the outer axial end 31b of the outlet module 30, are closed by means of end plates 15.

[0037] The pipe sections 11, 21, and 31, which form the pipe run, are, for example, corrugated pipe sections with a substantially circular cross-section and an inner diameter D. Alternatively, the pipe run can also have other cross-sectional shapes. The pipe run can be made of any material. In particular, plastics are suitable, preferably polyolefins such as polypropylene (PP) or polyethylene (PE). A corrugated pipe made of plastic offers the necessary strength.

[0038] The inlet nozzle 16 and the outlet nozzle 36 penetrate the wall of the pipe section 11 and 31 of the inlet module 10 and the outlet module 30, respectively, and each has a longitudinal axis that runs substantially at a right angle to the central axis Z of the pipe section. For the inlet nozzle 16 and the outlet nozzle 36, for example, plastic pipes or manholes can be used, the diameter of which is suitable for the inner diameter of the pipe section. With an inner diameter of the pipe section of approximately 1000 mm, the nozzles 16 and 36 could suitably have an outer diameter of approximately 400 mm. The nozzles 16 and 36 are preferably bonded to the pipe sections of the modules 10 and 30, respectively, in a rigid and fluid-tight manner, e.g., by welding. For this purpose, the nozzles 16 and 36 are preferably made of the same material as the pipe sections 11, 21, and 31.In the installed state, the end of each nozzle 16, 36 that protrudes outside the pipe section 11, 31 is closed by a manhole cover 17, which is only schematically indicated here.

[0039] Preferably, the outlet nozzle 36 is designed as a dip tube. This enables the retention of floating and suspended solids, and in the event of an accident, oils and the like can be contained.

[0040] The sedimentation system is laid underground in a manner known per se, such that the longitudinal axis Z of the settling chamber 50 runs essentially horizontally and the longitudinal axes of the inlet and outlet nozzles 16 and 36 are arranged vertically and parallel to each other. The sectional view in Fig. 2 intersects the longitudinal axes of inlet and outlet nozzles 16, 36 and the longitudinal axis Z of the pipe section or settling chamber 50.

[0041] To connect the sedimentation system to upstream and / or downstream systems (not shown), the inlet and / or outlet systems are aligned with the respective connections. Using appropriate pipe connections, the inlet system is permanently and fluid-tightly connected to a connection of an upstream system (e.g., rainwater drain), and the outlet system is connected to a connection of a downstream system (e.g., infiltration system).

[0042] While the conveyor module 20 and the discharge module 30 of the sedimentation plant according to the invention are designed in a manner known per se, the inlet module 10 of the sedimentation plant is designed in a novel way. This is described in detail below. The inlet module 10 is designed in Fig. 1 shown again in detail, with the cutting plane in Fig. 1 is the same as in Fig. 2.

[0043] In the inlet module shown here, one end of the inlet nozzle 16 projects into the interior of the settling chamber 50. The rainwater flowing in through the inlet nozzle 16 continues to flow in a circulation chamber 19, which in the inlet module 10 according to the invention is formed in the area between the inlet nozzle 16 and the closed end 11a of the pipe section 11. The circulation chamber 19 is formed by an offset length A by which the first, closable end 11a of the pipe section is axially spaced from the inlet device 16.

[0044] At the closed end 11a of the pipe section 11, the rainwater is deflected and only then flows in the opposite direction, i.e., towards the outlet module 30 with the outlet nozzle 36. This circular movement of the rainwater within the circulation chamber 19 in the inlet module 10, which initially runs counter to the actual flow direction within the pipe section, lengthens the flow path and thus the transit time of the rainwater compared to a case in which the rainwater were directed directly from the inlet opening 13 of the inlet nozzle 16 towards the outlet module 30. At the same time, the flow velocity of the rainwater is reduced. Strong turbulence of the rainwater can be avoided, and a flow with a greater laminar component can be generated. These effects are achieved with the inlet module design according to the invention without changing the length of the pipe section between the inlet and the outlet.In this configuration, the circulation space 19 extends the pipe section from the inlet nozzle 16 in the direction opposite to the outlet nozzle 36, with a central axis of the circulation space 19 coinciding with the central axis Z of the pipe section.

[0045] Measured between the longitudinal axis of the inlet nozzle 16 and the lockable end 11a of the inlet module 10, the offset length A is preferably at least as large as the inner diameter of the pipe section 11.

[0046] A further improvement in cleaning performance is achieved if the offset length A is at least equal to one and a half times the diameter of the pipe section 11.

[0047] In order to avoid making the inlet module 10 excessively bulky, the offset length A can be chosen to be less than two and a half times the inner diameter of the pipe section 11.

[0048] If, for example, the pipe section 11 has an inner diameter of 800 mm, the offset length A should therefore be at least 800 mm, preferably at least 1200 mm, but at most 2000 mm. In an exemplary, preferred embodiment, the offset length A is approximately 1500 mm with an inner diameter of the pipe section 11 of approximately 800 mm.

[0049] If the pipe section 11 has an inner diameter of 1000 mm, the offset length A should be at least 1000 mm, preferably at least 1500 mm, but at most 2500 mm.

[0050] In the illustrated embodiment of the inlet module 10, the end of the inlet nozzle 16 projecting into the settling chamber 50 is also designed in a novel way.

[0051] Firstly, the end of the inlet nozzle 16 projecting into the settling chamber 50 is chamfered at an angle α relative to the longitudinal axis of the inlet nozzle. This gives the inlet opening 13, through which the rainwater enters the settling chamber 50, an oval outline. The chamfer is designed such that the inlet nozzle 16 opens towards the circulation chamber 19. The angle α is preferably between 5 and 35 degrees, and approximately 20° in the present embodiment.

[0052] Secondly, the end of the inlet nozzle 16 projecting into the settling chamber 50 is provided on the side facing away from the end plate 15, i.e., facing the section module 20, with an arc-shaped extension 14, which is itself attached to the end of the inlet nozzle 16. In the present embodiment, the extension 14 is designed as a segmented arc and welded to the end of the inlet nozzle 16. Reference numeral 22 designates the associated weld. However, the extension 14 can also be attached to the end of the inlet nozzle 16 in another way or even be formed integrally with the inlet nozzle 16. The segmented arc itself is composed of individual plate-shaped segments, for example, welded together.

[0053] The extension 14 is designed and attached to the end of the inlet nozzle such that it forms an angle β with the longitudinal axis of the inlet nozzle 16, which here runs vertically. In the sectional view according to Fig. 1 the angle β is preferably between 15 and 55 degrees, in the present embodiment about 40° to the longitudinal axis of the inlet nozzle 16 and thus also to the vertical.

[0054] Due to this design of the inlet end of the inlet 16, which is angled on one side and provided with the angled extension 14 on the other, the inlet opening 13 faces the left, closed end 11a and the bottom of the pipe section of the inlet module 10. Unlike inlet 16s without this design, not all of the rainwater that is introduced into the settling chamber 50 via the inlet 16 directly impacts the bottom of the pipe section. Instead, the rainwater is given a downward, oblique motion. In this respect, the angled design and / or the extension 14 at the lower end of the inlet 16 achieves an advantageous effect even independently of the presence of the circulation chamber 19.The chamfer and the extension advantageously complement the function of the circulation space 19 insofar as the circulation space 19 offers enough space for the rainwater to flow in the direction already specified by the extension 14 and / or the chamfer and subsequently be deflected.

[0055] The operating principle of the sedimentation plant according to the invention will now be described.

[0056] Under normal operating conditions, the sedimentation system is continuously filled, and the settling chamber 50 is completely full. A liquid, e.g., rainwater from the roof drain of a residential building, is introduced into the sedimentation system via the inlet device. The rainwater enters the interior of the settling chamber 50 through the inlet opening 13 at the end of the inlet nozzle 16. Due to the design of the inlet nozzle 16's end, as described above, with its extension 14, the liquid flow entering the settling chamber 50 is set into a circulating motion through the circulation chamber 19 in the inlet module 10. During this circulation, coarse substances contained in the rainwater are already settled. The rainwater then flows on through the channel module 20 to the outlet module 30, where it is discharged from the sedimentation system in a manner known per se and, for example, conveyed into an insurance system.

[0057] Fig.Figure 3 shows a comparative example of a sedimentation plant, which is approximately identical to the one known from DE 20 2005 014 237 U1 discussed above. The inlet module 10' of this sedimentation plant does not have a circulation space according to the invention, because the offset length A' of the pipe section of the inlet module 10 (measured from the longitudinal axis of the inlet nozzle 16' to the sealed end of the pipe section of the inlet module 10') is too short to form such a circulation space. Consequently, the overall length L' is also z The inlet module is significantly shorter than the total length L (10'). z of the inlet module 10 according to the invention.

[0058] Due to the extended flow path provided by the circulation chamber 19, the sedimentation system according to the invention offers improved cleaning performance compared to a sedimentation system with the same inner diameter but without a circulation chamber. Conversely, the sedimentation system according to the invention with the circulation chamber achieves the same cleaning performance as a sedimentation system without a circulation chamber, even with a smaller inner diameter D. In a specific example, a sedimentation system according to the invention with a circulation chamber achieved a cleaning performance with an inner diameter D of 800 mm that a sedimentation system without a circulation chamber only achieved with an inner diameter D' of 1000 mm. The sedimentation system according to the invention can therefore either be designed more compactly while maintaining the same performance, or it achieves better cleaning performance with the same design.

[0059] The above description of the preferred embodiment of the inlet module 10 serves to illustrate the invention but is not intended to limit its scope. This also applies, and especially so, to the fact that the advantages discussed in connection with the preferred embodiment of the inlet module 10 can be achieved not only with a modular sedimentation plant but also with a one-piece plant that has a circulation chamber of the type described above in the area of ​​its inlet.

Claims

[1] Inlet module (10) for a sedimentation plant, which inlet module comprises a pipe section (11) and at least one inlet device through which a liquid can be introduced into the pipe section (11), wherein the pipe section (11) has a first, closable end (11a) in the axial direction, which is spaced from the inlet device in the axial direction by an offset length (A), and a second, open end (11b) which is designed for connection to another module (20, 30) of the sedimentation plant, wherein the inlet device has an inlet nozzle (16) which projects into the interior of the pipe section (11) of the inlet module (10), characterized by , that the offset length (A) is dimensioned such that a circulation space (19) is formed between the inlet device and the closable axial end (11a) of the pipe section (11), in which the liquid introduced into the inlet module (10) by the inlet device can circulate before being directed towards the open end (11b) of the pipe section (11) of the inlet module (10), the inlet nozzle (16) opens towards the circulation space (19). [2] Inlet module (10) according to claim 1, in which the offset length (A) in the axial direction of the pipe section (11) is determined from a central axis of the inlet device to the lockable axial end (11a) of the pipe section (11) of the inlet module (10) and is at least equal to an inner diameter (D) of the pipe section (11) of the inlet module (10). [3] Inlet module (10) according to claim 2, wherein the offset length (A) determined in this way is at least equal to 1.5 times, or better yet at least equal to 1.75 times, the inner diameter (D) of the pipe section (11) of the inlet module (10). [4] Inlet module (10) according to claim 2 or 3, wherein the offset length (A) determined in this way is at most 2.5 times, better yet at most 2.25 times, and even better at most 2 times the inner diameter (D) of the pipe section (11) of the inlet module (10). [5] Inlet module (10) according to claim 1, in which the inlet nozzle (16) has a longitudinal axis which is substantially perpendicular to a longitudinal axis (Z) of the pipe section (11) of the inlet module (10). [6] Inlet module (10) according to claim 1, in which the end of the inlet nozzle (16) projecting into the interior of the pipe section (11) is inclined at an angle (α) relative to the longitudinal axis of the inlet nozzle, which angle (α) is preferably between 5 and 35 degrees, more preferably about 20 degrees. [7] Inlet module (10) according to claim 1 or 6, in which the end of the inlet nozzle (16) projecting into the interior of the pipe section (11) is provided in its area facing away from the closable end (11a) of the pipe section (11) with a projection (14) attached at an angle (β), which angle (β) is preferably between 15 and 55 degrees, more preferably about 40 degrees to the longitudinal axis of the inlet nozzle (16). [8] Sedimentation plant with: a pipe section formed by at least one pipe section (11, 21, 31), an inlet device through which a liquid can be introduced into the pipe section, and a drainage device (36) through which the liquid can be drained from the pipe section, wherein the pipe section has a first (11a) and a second end (31b) in the axial direction, and wherein the first end (11a) of the pipe section is spaced away from the inlet device in the axial direction and from the outlet device (36) by an offset length (A), wherein the inlet device has an inlet nozzle (16) which projects into the interior of the pipe section (11) of the inlet module (10), characterized by , that the offset length (A) is dimensioned such that a circulation space (19) is formed between the inlet device and the lockable axial end (11a) of the pipe section, in which the liquid introduced into the inlet module (10) by the inlet device can circulate before being directed towards the outlet device (36), the inlet nozzle (16) opens towards the circulation space (19). [9] Sedimentation plant according to claim 8, in which the offset length (A) in the axial direction of the pipe section is determined from a central axis of the inlet device to the first axial end (11a) of the pipe section and is at least equal to an inner diameter (D) of the pipe section. [10] Sedimentation plant according to claim 9, in which the offset length (A) thus determined is at least equal to 1.5 times, or better yet at least equal to 1.75 times, the inner diameter (D) of the pipe section. [11] Sedimentation plant according to claim 9 or 10, in which the offset length (A) thus determined is at most equal to 2.5 times, better yet at most equal to 2.25 times, and even better at most equal to 2 times the inner diameter (D) of the pipe section. [12] Sedimentation plant according to claim 8, in which the inlet nozzle (16) has a longitudinal axis which is substantially perpendicular to a longitudinal axis (Z) of the pipe section. [13] Sedimentation plant according to claim 8, in which the end of the inlet nozzle (16) projecting into the interior of the pipe section is inclined at an angle (α) to the longitudinal axis of the inlet nozzle, which angle (α) is preferably between 5 and 35 degrees, more preferably about 20 degrees. [14] Sedimentation plant according to claim 8 or 13, in which the end of the inlet nozzle (16) projecting into the interior of the pipe section is provided in its area facing away from the first end (11a) of the pipe section with a projection (14) attached at an angle (β), which angle (β) is preferably between 15 and 55 degrees, more preferably about 40 degrees to the longitudinal axis of the inlet nozzle (16). [15] Sedimentation plant according to claim 8, which is modular in design and has at least one inlet module (10), at least one outlet module (30) and optionally at least one path module (20) between inlet module (10) and outlet module (30), wherein the inlet device (16) is part of the inlet module (10) and the outlet device (36) is part of the outlet module (30).

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