Water distributor and sewage treatment equipment

Abstract

The present invention relates to the technical field of water treatment equipment, and in particular to a water distributor and sewage treatment equipment. The water distributor includes a water distribution body and a first water distribution hole. The center position of the water distribution body is higher than the end edge. A water distribution surface is constructed between the center position of the water distribution body and the end edge, and the water distribution surface is an arc surface. The first water distribution hole is arranged at the center position of the water distribution body and is suitable for connecting the pipe network, so that the fluid in the pipe network can pass through the first water distribution hole and then flow evenly from the center position of the water distribution body to the end edge along the water distribution surface. The water distributor can introduce fluids such as sewage into the water distribution body through the self-flow and gravity of the fluid, and evenly guide and disperse the fluid into the equipment along the arc-shaped water distribution surface of the water distribution body, thereby achieving uniform water distribution without external power driving action, and effectively improving the uniformity of water distribution, thereby improving the subsequent water treatment effect and treatment efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment equipment, and in particular to a water distributor and sewage treatment equipment. Background Art

[0002] The water distributor in water treatment equipment is a core device used to evenly distribute water flow. Its main function is to evenly and stably disperse the incoming water or treatment medium (such as sewage, chemicals, etc.) to the entire cross-section of the treatment unit (such as filter tanks, reaction tanks, sedimentation tanks, etc.) to avoid local water flow being too fast or too slow, thereby improving treatment efficiency and effect.

[0003] In the existing water treatment industry, especially in the sewage treatment industry, the mainstream sewage treatment processes mainly include traditional activated sludge process, SBR process, biofilm process, A2O process, AAO process and AO process, etc. All links of these processes involve the use of power to drive and support the operation of sewage in the equipment.

[0004] The above-mentioned sewage treatment process usually includes a process link of bio-trickling filtration. Bio-trickling filtration is a biofilm technology that uses microorganisms to degrade pollutants. Its core principle is to spray the medium containing pollutants evenly onto the biological filler layer, so that the microorganisms form a biofilm on the filler surface, decompose the pollutants through metabolism, and ultimately achieve the purpose of purification. The process link involving bio-trickling filtration in the existing process usually involves pumping sewage into a reactor filled with biological filler, and introducing air into the reactor to allow the sewage to come into contact with the oxygen in the air, thereby achieving the degradation of harmful substances in the sewage. In this process, the sewage is evenly distributed by pumps, so it is necessary to separately add a fluid drive device to drive the sewage to flow. However, in some small sewage treatment equipment, due to the limitations of equipment structure, system scale, and operating environment, the drive device that provides external power is difficult to install, and therefore it is impossible to rely on external drive devices to achieve uniform distribution and distribution of sewage. Summary of the Invention

[0005] The present invention provides a water distributor and sewage treatment equipment, which are used to reasonably decouple the water distributor from a power drive device, thereby achieving uniform water distribution without external power.

[0006] The present invention provides a water distributor, comprising a water distribution body and a first water distribution hole.

[0007] The center position of the water distribution body is higher than the end edge, and a water distribution surface is constructed between the center position of the water distribution body and the end edge, and the water distribution surface is a curved surface.

[0008] The first water distribution hole is arranged at the center position of the water distribution body and is suitable for connecting the pipeline network so that the fluid in the pipeline network can pass through the first water distribution hole and then flow evenly from the center position of the water distribution body along the water distribution surface to the end edge.

[0009] According to the water distributor of the present invention, the cross-sectional contour line of the water distribution surface is a line connecting the center position of the water distribution body and the end edge, and the cross-sectional contour line of the water distribution surface is a cycloid.

[0010] According to the water distributor of the present invention, a plurality of water distribution teeth are evenly arranged on the end edge of the water distribution body.

[0011] According to the water distributor described in the present invention, a plurality of water distribution plates are arranged at intervals on the water distribution body, and each of the water distribution plates is constructed into an arc-shaped structure along the curved surface of the water distribution surface; one end of each water distribution plate is close to the center of the water distribution body, and the other end of each water distribution plate is connected to the end edge of the water distribution body.

[0012] According to a water distributor described in the present invention, the end edge of the water distribution body is a disc-shaped structure; and / or the end edge of the water distribution body is constructed with a plurality of concave areas arranged at intervals, and the edge of each of the concave areas forms an arc-shaped concave edge that bends upward and inward relative to the end edge, and the two ends of the concave edge are smoothly connected to the adjacent end edges.

[0013] The water distributor according to the present invention further includes: a pipe connector, an adjusting bushing and an adjusting rod.

[0014] A pipe connector is connected to the center of the water distribution body, the pipe connector is suitable for connecting to the pipe network pipeline, and the tube cavity port of the pipe connector is arranged above the first water distribution hole.

[0015] The regulating bushing is embedded in the pipe connector; the regulating bushing is funnel-shaped, and a water diversion hole is provided at the center of the regulating bushing.

[0016] One end of the regulating rod is fixed to the center of the water distribution body and is arranged to avoid the first water distribution hole; the other end of the regulating rod is connected to the pipe connector.

[0017] According to the water distributor of the present invention, the pipe connector includes a connecting body and a flange.

[0018] The connecting body is axially provided with a tube cavity, the first end of the tube cavity is suitable for connecting to the pipe network pipeline, and the regulating core can be embedded in the first end of the tube cavity; the second end of the tube cavity faces the first water distribution hole.

[0019] A flange is fixedly connected to the connecting body, and the flange is connected to the adjusting rod.

[0020] According to the water distributor described in the present invention, the outer diameter of the flange is larger than the outer diameter of the connecting body; the end of the adjusting rod away from the water distribution body is passed through the flange, and at least one pair of locking nuts is provided on the adjusting rod, and the pair of locking nuts are respectively assembled on the upper surface and the lower surface of the flange to lock and fix the flange and the adjusting rod.

[0021] According to the water distributor described in the present invention, the water distributor includes at least three adjusting rods, each of which is vertically connected between the water distribution body and the pipe connector, and each of the adjusting rods is evenly distributed around the first water distribution hole.

[0022] The present invention also provides a sewage treatment device, comprising the water distributor as described above.

[0023] The present invention provides a water distributor, comprising a water distribution body and a first water distribution hole. The center of the water distribution body is higher than the distal edge, creating a height difference between the center and the distal edge of the water distribution body. This allows fluid to flow along the surface of the water distribution body by virtue of its self-flow and gravity, achieving the effect of fluid movement without external driving force. A water distribution surface is formed between the center and the distal edge of the water distribution body. The water distribution surface is an arc-shaped surface, which improves the uniformity of water distribution within the water distribution body. The first water distribution hole is located at the center of the water distribution body and is suitable for connecting to a pipe network. After passing through the first water distribution hole, fluid in the pipe network flows evenly along the water distribution surface from the center of the water distribution body to the distal edge. The water distributor can introduce fluids such as sewage into the water distribution body by virtue of the fluid's self-flow and gravity, and evenly guide the fluid from the center to the distal edge along the curved water distribution surface of the water distribution body, distributing it into the device. This achieves uniform water distribution without external driving force, effectively improving water distribution uniformity and thereby enhancing subsequent water treatment effects and efficiency.

[0024] The present invention further provides a sewage treatment device comprising the water distributor as described above. By providing the water distributor, the sewage treatment device has all the advantages of the water distributor as described above, and the details will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is one of the structural schematic diagrams of the water distributor provided by the present invention.

[0027] Figure 2 yes Figure 1 A cross-sectional view of a water distributor is shown.

[0028] Figure 3 yes Figure 1 Schematic diagram of the structural explosion of the water distributor is shown.

[0029] Figure 4 This is the second structural schematic diagram of the water distributor provided by the present invention.

[0030] Figure 5 yes Figure 4 A cross-sectional view of a water distributor is shown.

[0031] Reference numerals:

[0032] 1. Adjusting bushing; 2. First locking nut; 3. Second locking nut; 4. Adjusting rod; 5. Water distribution plate; 6. First water distribution tooth; 7. Second water distribution tooth; 8. Pipe connector; 81. Connecting body; 82. Flange; 9. First water distribution hole; 10. Second water distribution hole; 11. Water distribution body; 12. Concave area; 13. End edge; 14. Concave edge; 15. Section outline. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0034] The following combination Figures 1 to 5 The present invention describes a water distributor and sewage treatment equipment equipped with the water distributor.

[0035] like Figures 1 to 3As shown, the water distributor according to an embodiment of the present invention includes a water distribution body 11 and a first water distribution hole 9. The center of the water distribution body 11 is higher than the end edge 13, creating a height difference between the center and edge of the water distribution body 11. This allows for the fluid to flow from the center of the water distribution body 11 along the water distribution surface toward the end edge 13, leveraging the fluid's self-flow and gravity. This allows for fluid movement without external force. A water distribution surface is formed between the center of the water distribution body 11 and the end edge 13. This curved surface improves water distribution uniformity within the water distribution body 11. The first water distribution hole 9 is located at the center of the water distribution body 11 and is suitable for connection to a pipe network. The first water distribution hole 9 guides the fluid, ensuring that after passing through the first water distribution hole 9, the fluid flows evenly along at least one surface (the upper and / or lower surface) of the water distribution surface toward the end edge 13, enhancing controllability and improving the efficiency of uniform water distribution. The first water distribution hole 9 can introduce a part of the water flow into the lower surface of the water distribution body 11, which can effectively divert the fluid flowing into the water distributor, so that the upper and lower surfaces of the water distribution body 11 can produce uniform water distribution, avoiding excessive fluid flow overflow and affecting the water distribution effect.

[0036] It can be seen that the water distributor can introduce fluids such as sewage into the water distribution body 11 through the self-flow of the fluid and the action of gravity, and evenly guide the fluid from the center to the outer edge along the curved water distribution surface of the water distribution body 11 and disperse it into the equipment, thereby achieving uniform water distribution without external power drive, and effectively improving the uniformity of water distribution, thereby improving subsequent water treatment effects and treatment efficiency.

[0037] In some embodiments, as Figure 2 As shown, after cutting the water distribution body 11 through its center, a cross-sectional profile 15 is obtained. Specifically, cross-sectional profile 15 is the line connecting the center of the water distribution body 11 and the end edge 13. In this embodiment, cross-sectional profile 15 of the water distribution surface is a cycloid. A cycloid is a curve that is traced by a point on the circumference of a circle or associated with a circle when it is assumed to roll along a specific path without slipping. The trajectory equation of cross-sectional profile 15 of the water distribution surface described in this embodiment follows the cycloid equation, which is as follows:

[0038]

[0039] Wherein, (x, y) represents the coordinates of the trajectory point of the cross-sectional contour line 15 of the water distribution surface, that is, the trajectory point of the cycloid circle; r represents the radius of the circle; and t represents the arc (rolling angle) passed by the radius of the circle.

[0040] As can be understood, the use of the trochoid as the cross-sectional contour line 15 of the water distribution surface in this embodiment fully utilizes the isochronism and brachistochrone properties of the trochoid. In other words, using the trochoid as the fluid flow trajectory allows the fluid to flow along the shortest path in the gravitational field. This ensures that sewage flows out of the water distribution body at the fastest speed, resulting in a larger water distribution area and higher efficiency.

[0041] In some embodiments, as Figure 1 As shown, a number of water distribution plates 5 are arranged at intervals on the water distribution body 11. The water distribution plates 5 are used to evenly distribute the water flowing through the water distribution surface, so that there is fluid distribution in each direction, thereby improving the uniformity of water distribution. Each water distribution plate 5 is constructed into an arc-shaped structure along the curved surface of the water distribution surface, that is, one end of each water distribution plate 5 is close to the center of the water distribution body 11, and the other end of each water distribution plate 5 is connected to the end edge 13 of the water distribution body 11. In order to better guide the distribution of water flow, it is preferred that the middle parts of all water distribution plates 5 are bent into an arc in the same direction. Therefore, all water distribution plates 5 can be arranged at intervals on the water distribution surface and bent into an arc toward the same side, forming a structure that is all bent clockwise or all bent counterclockwise, so that the water distribution flow direction is controllable and the diversion is more uniform and reliable.

[0042] In some embodiments, as Figures 1 to 3 As shown, a number of water distribution teeth are evenly arranged on the end edge 13 of the water distribution body 11. A plurality of water distribution teeth can be arranged at intervals along the end edge 13 of the water distribution body 11. One end of each water distribution tooth is connected to the water distribution edge line, and the other end extends upward or downward from the water distribution surface. A plurality of water distribution teeth can be arranged at the end edge 13 of the water distribution body 11 to form a continuous tooth-like structure. Gaps are left between adjacent water distribution teeth to allow water to flow through. A plurality of water distribution teeth are used to make the water flow evenly distributed on the water distribution surface a more refined and even secondary distribution, so that the water flow out of the water distributor is more evenly distributed, and truly achieves uniform water distribution without dead angles around the water distributor.

[0043] In some specific embodiments, Figures 1 to 3 As shown, the multiple water distribution teeth include a number of first water distribution teeth 6 and a number of second water distribution teeth 7. All the first water distribution teeth 6 are arranged at the end edge 13 of the water distribution body 11 to form a continuous tooth-like structure, and one end of each first water distribution tooth 6 is connected to the water distribution edge line, and the other end extends upward from the water distribution surface. A water gap is left between adjacent first water distribution teeth 6 so that it can be used to distribute the water flowing through the upper surface of the water distribution surface in a more uniform, detailed and efficient manner. Similarly, all the second water distribution teeth 7 are arranged at the end edge 13 of the water distribution body 11 to form a continuous tooth-like structure, and one end of each second water distribution tooth 7 is connected to the water distribution edge line, and the other end extends downward from the water distribution surface. A water gap is left between adjacent second water distribution teeth 7 so that it can be used to distribute the water flowing through the lower surface of the water distribution surface in a more uniform, detailed and efficient manner.

[0044] It is understandable that the water distribution body 11 described in the embodiment of the present invention may be provided with only the first water distribution teeth 6, only the second water distribution teeth 7, or both the first water distribution teeth 6 and the second water distribution teeth 7. If the water distribution body 11 is provided with the first water distribution teeth 6 and the second water distribution teeth 7, it is preferred that the first water distribution teeth 6 and the second water distribution teeth 7 are provided in a one-to-one correspondence up and down, thereby ensuring that the water distribution uniformity on the upper and lower surfaces of the water distribution surface of the water distribution body 11 is consistent, thereby avoiding water overflow and affecting the water distribution uniformity.

[0045] In some embodiments, as Figure 4 and Figure 5 As shown, the end edge 13 of the water distribution body 11 is disc-shaped, so that the fluid can be evenly distributed on the water distribution surface as it flows from the center of the water distribution body 11 through the water distribution surface to the end edge 13. In the structure of the water distribution body 11, the disc-shaped end edge 13 is located at a lower position relative to the center, so this structure forms the outer contour of the water distribution body 11 into a trumpet-shaped structure.

[0046] In some embodiments, as Figures 1 to 3 As shown, the end edge 13 of the water distribution body 11 is preferably configured with a plurality of spaced concave areas 12. The edge of each concave area 12 forms an arc-shaped concave edge 14 that bends upward and inward relative to the end edge 13, as shown in FIG. Figure 3 As shown. In addition, the two ends of the concave edge 14 are smoothly connected to the adjacent end edge 13. This setting allows the surface of the water distribution body 11 to form a certain undulating surface at intervals near the end edge 13, and shortens the local fluid flow distance. It can be understood that the vertex position of the concave area 12 is the position where the concave edge 14 and the center position are the shortest, and it is also the position where the undulation amplitude of the water distribution surface is the highest, because the fluid can flow out of the water distribution body 11 in advance at the concave edge 14, so that the water distributor can distribute water evenly according to the internal and external layers, and produce a more uniform and thorough water distribution effect from the water distribution area.

[0047] It is understandable that the above-mentioned concave area 12 can be set on the water distribution body 11 at the same time as the disc-shaped end edge 13, or the concave area 12 can be set only on the water distribution body 11 or the disc-shaped end edge 13 can be set only on the water distribution body 11.

[0048] In some specific embodiments, Figure 4 and Figure 5As shown, a plurality of second water distribution holes 10 are preferably provided on the water distribution surface of the water distribution body 11. The second water distribution holes 10 can penetrate the upper and lower surfaces of the water distribution body 11, so that when the fluid flows through the water distribution surface of the water distribution body 11, a portion of the water flow is guided from the upper surface of the water distribution body 11 to the lower surface, thereby distributing more water flow to the bottom of the water distribution body 11, thereby improving the water distribution efficiency and water replenishment uniformity.

[0049] It is understandable that the distribution position and aperture of the second water supply holes are preferably adjusted according to the actual requirements of water distribution volume and water distribution density.

[0050] In some embodiments, as Figure 3 As shown, to reliably connect the water distributor to the water treatment system's pipeline network, the water distributor preferably also includes: a pipe connector 8, an adjusting bushing 1, and an adjusting rod 4. The pipe connector 8 is connected to the center of the water distributor body 11. The pipe connector 8 is suitable for connecting to the pipeline network. The lumen end of the pipe connector 8 is located above the first water distribution hole 9, allowing sewage in the pipeline network to be introduced into the first water distribution hole 9. The pipe connector 8 can be replaced with an appropriate diameter according to the diameter of the pipeline network. The pipe connector 8 and the pipeline network can be connected using threads or glue. The adjusting bushing 1 is embedded in the pipe connector 8 and is used to adjust the water inlet flow rate. The adjusting bushing 1 is preferably funnel-shaped, with a water inlet hole at its center. The diameter of the water inlet hole can be adjusted according to the fluid flow rate, or the adjusting bushing 1 with a water inlet hole of the appropriate diameter can be replaced according to the fluid flow rate. The water distribution body 11 is equipped with several adjustment rods 4. One end of the adjustment rod 4 is fixed to the center of the water distribution body 11 and is arranged to avoid the first water distribution hole 9. The other end of the adjustment rod 4 is connected to the pipe connector 8. The connection position of the pipe connector 8 and the adjustment rod 4 can be flexibly adjusted, thereby flexibly changing the distance between the pipe connector 8 and the water distribution body 11. The distance between the two is determined by the water distribution situation.

[0051] In some specific embodiments, Figure 3As shown, the preferred pipe connector 8 includes: a connecting body 81 and a flange 82. The connecting body 81 is provided with a tube cavity in the axial direction. The first end of the tube cavity is suitable for connecting to the pipe network pipeline, so as to introduce the water flow in the pipe network pipeline into the water distributor. The regulating core 1 can be embedded in the first end of the tube cavity, with the first end of the tube cavity as the fluid inlet, and the regulating core 1 is used to reliably control the flow of the fluid inlet. The second end of the tube cavity faces the first water distribution hole 9 so as to accurately deliver the fluid into the first water distribution hole 9. The flange 82 is fixed to the connecting body 81, and the flange 82 is connected to the adjusting rod 4. Preferably, the outer diameter of the flange 82 is larger than the outer diameter of the connecting body 81, so as to utilize the outer edge platform of the flange 82 to be reliably connected to the adjusting rod 4. Preferably, the end of the adjusting rod 4 away from the water distribution body 11 is passed through the flange 82; at least one pair of locking nuts is provided on the adjusting rod 4, for example Figure 3 The first locking nut 2 and the second locking nut 3 are shown. A pair of locking nuts are respectively assembled on the upper and lower surfaces of the flange 82 to lock the flange 82 to the adjustment rod 4. By locking the pair of locking nuts relative to each other, the flange 82 can be fixed at any height position of the adjustment rod 4, thereby flexibly adjusting the distance between the pipe connector 8 and the water distribution body 11 by utilizing the positional relationship between the adjustment rod 4 and the flange 82.

[0052] In some specific embodiments, the water distributor preferably includes at least three adjustment rods 4. Each adjustment rod 4 is vertically connected between the water distribution body 11 and the pipe connector 8, and each adjustment rod 4 is evenly distributed around the first water distribution hole 9. By using multiple adjustment rods 4 to adjust the height position of different circumferential points of the flange 82 on the corresponding adjustment rod 4, the horizontality of the water distribution body 11 relative to the pipe connector 8 can be reliably fine-tuned, thereby achieving reliable fine-tuning of the relationship between the horizontality of the water distribution body 11 and the angle at which the fluid enters the water distributor, making the water distribution more uniform and efficient.

[0053] To sum up, the water distributor described in the embodiment of the present invention can be applied to pipes with gravity flow of incoming water. It does not require power and fully achieves uniform water distribution. It is also simple to install, does not require maintenance in the later stage, and can be reused. It is a good water distribution device for small unpowered sewage treatment equipment.

[0054] The sewage treatment equipment described in the embodiment of the present invention includes the water distributor described above. Preferably, the water distributor is connected to the pipe network of the sewage treatment equipment. By providing the water distributor, the sewage treatment equipment has all the advantages of the water distributor described above, and the details will not be repeated here.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A water distributor, characterized in that: include: A water distribution body, the center of which is higher than the end edge, and a water distribution surface is constructed between the center of the water distribution body and the end edge, and the water distribution surface is a curved surface; a first water distribution hole, which is provided at the center of the water distribution body and is suitable for connecting to a pipe network, so that the fluid in the pipe network can pass through the first water distribution hole and then flow evenly from the center of the water distribution body along the water distribution surface to the end edge; A plurality of water distribution teeth are evenly arranged on the end edge of the water distribution body; The end edge of the water distribution body is in a disc-shaped structure; and / or the end edge of the water distribution body is configured with a plurality of spaced-apart concave areas, the edge of each of the concave areas forming an arc-shaped concave edge that curves upward and inward relative to the end edge, and the two ends of the concave edge are smoothly connected to the adjacent end edge; Also includes: a pipe connector connected to the center of the water distribution body, the pipe connector being suitable for connecting to the pipe network, and a lumen port of the pipe connector being arranged above the first water distribution hole; An adjusting bushing is embedded in the pipe connector; the adjusting bushing is funnel-shaped, and a water diversion hole is provided in the center of the adjusting bushing; One end of the regulating rod is fixed to the center of the water distribution body and is arranged to avoid the first water distribution hole; the other end of the regulating rod is connected to the pipe connector.

2. The water distributor according to claim 1, characterized in that: The cross-sectional contour line of the water distribution surface is a line connecting the center position of the water distribution body and the end edge, and the cross-sectional contour line of the water distribution surface is a cycloid.

3. The water distributor according to claim 1, characterized in that: Several water distribution plates are arranged at intervals on the water distribution body, and each water distribution plate is constructed into an arc-shaped structure along the arc surface of the water distribution surface; one end of each water distribution plate is close to the center of the water distribution body, and the other end of each water distribution plate is connected to the end edge of the water distribution body.

4. The water distributor according to any one of claims 1 to 3, characterized in that: The pipeline connector includes: The connecting body is provided with a tube cavity in the axial direction, the first end of the tube cavity is suitable for connecting to the pipe network pipeline, the regulating bushing can be embedded in the first end of the tube cavity; the second end of the tube cavity faces the first water distribution hole; A flange is fixedly connected to the connecting body, and the flange is connected to the adjusting rod.

5. The water distributor according to claim 4, characterized in that: The outer diameter of the flange is larger than the outer diameter of the connecting body; the end of the adjusting rod away from the water distribution body is passed through the flange, and at least one pair of locking nuts is provided on the adjusting rod, and the pair of locking nuts are respectively assembled on the upper surface and the lower surface of the flange to lock and fix the flange and the adjusting rod.

6. The water distributor according to claim 4, characterized in that: The water distributor includes at least three adjusting rods, each of which is vertically connected between the water distribution body and the pipe connector, and each of the adjusting rods is evenly distributed around the first water distribution hole.

7. A sewage treatment equipment, characterized in that: It comprises the water distributor as described in any one of claims 1-6.

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