Ecological flow control type comprehensive trash holding structure

Abstract

The utility model relates to an ecological flow control type comprehensive trash holding structure which comprises a grit chamber and a flow passing assembly arranged on the first side wall of the grit chamber. The interior of the grit chamber is divided into a water flow section, a transition section and a sedimentation section which are sequentially connected, the height of the middle bottom of the water flow section is larger than that of the middle bottom of the sedimentation section, the longitudinal section of the transition section is of an inverted-S-shaped structure, and inlet water sequentially passes through the water flow section, the transition section and the sedimentation section and then is introduced into a downstream water body from the overflowing assembly. The grit chamber has the beneficial effects that the structural design of the water flow section, the transition section and the settling section in the grit chamber can optimize the flow state of water flow, reduce turbulent fluctuation of a water body and facilitate settling of suspended particles, and in addition, submerged plants are planted at the bottom of the grit chamber, so that settled nutrients can be degraded and absorbed; the overflowing assembly can comprehensively intercept floating objects and suspended objects carried by upstream incoming water, the upstream water level is stably adjusted, and the hydraulic retention time and the discharged ecological flow are controlled.

Description

Technical Field

[0001] This utility model relates to the field of environmental engineering technology, specifically to an ecological flow control integrated pollution interception structure. Background Technology

[0002] Mature industrial point-source intensive wastewater treatment models for agricultural non-point source water pollution have proven to be costly in practice. With the rise of ecological governance models, ecological technologies such as ecological ditches, ecological ponds, stabilization ponds, and constructed wetlands have been widely applied to the treatment of agricultural non-point source water pollution, achieving good results.

[0003] During the treatment of agricultural non-point source wastewater using ecological technologies, floating and suspended solids carried by the wastewater accumulate and settle within the ecological engineering system. Without effective interception measures, these contaminants can easily clog the flow channels of the ecological engineering system, reducing its purification function and shortening its lifespan. Conventional interception technologies typically involve installing screens and nets at the inlet and outlet, which can intercept some floating and suspended solids. However, their effectiveness in intercepting small-volume floating and suspended solids and settled particles in the water is not ideal, and the intercepted floating and suspended solids are prone to clogging the interception structure. Furthermore, these types of interception structures rarely provide controllable regulation of upstream water levels or ensure the required downstream ecological flow. Utility Model Content

[0004] This utility model addresses the technical problems existing in the prior art by proposing an ecological flow control integrated pollution interception structure. It overcomes the problems of single function, limitation, and easy clogging of traditional pollution interception structures. It can comprehensively intercept floating objects, suspended objects, and sediments carried by upstream water, effectively control the flow and ensure the ecological flow needs of downstream areas. It has the advantages of efficient and comprehensive pollution interception, stable regulation and control of flow, and guarantee of downstream ecological flow.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An ecological flow control integrated pollution interception structure includes a sedimentation tank and a flow-through component disposed on the first side wall of the sedimentation tank; the sedimentation tank is divided into a water flow section, a transition section and a sedimentation section connected in sequence, the bottom height of the water flow section is greater than the bottom height of the sedimentation section, the longitudinal section of the transition section is an inverted S-shaped structure, and the influent flows through the water flow section, the transition section and the sedimentation section in sequence and is discharged into the downstream water body through the flow-through component.

[0006] As a further technical solution, the height of the second sidewall symmetrically arranged on both sides of the sedimentation tank is greater than the height of the first sidewall.

[0007] As a further technical solution, the flow-through component is embedded in the first sidewall, and its inlet is connected to the inlet section in the first sidewall, and its outlet is located on the outer wall of the first sidewall to communicate with the downstream water body.

[0008] As a further technical solution, the opening of the water inlet section gradually decreases along the water flow direction.

[0009] As a further technical solution, the outlet of the inlet section is located at its top to communicate with the flow-through component.

[0010] As a further technical solution, the flow-through assembly includes several Z-shaped bends, several connecting elbows, and several connecting pipes. Each bend has at least one water inlet along its height direction, and the water inlet of each bend is connected to one of the connecting elbows.

[0011] The water inlets below the top of the bend are all connected to the connecting elbow through a connecting pipe, and the water inlet of the connecting elbow is connected to the water outlet at the top of the water inlet section.

[0012] The outlet of the inlet section is connected to the connecting elbow.

[0013] As a further technical solution, a first set of water inlet sections is provided on the vertical surface of the first sidewall. The first set of water inlet sections are provided with a second set of water inlet sections, a third set of water inlet sections, and a fourth set of water inlet sections with symmetrical structures in sequence along the left and right sides of the vertical surface of the first sidewall. The height of the bends connected to the second set of water inlet sections, the third set of water inlet sections, and the fourth set of water inlet sections are arranged in an arithmetic progression.

[0014] The height of the bend connected to the first group of water inlet sections is the same as the height of the bend connected to the fourth group of water inlet sections.

[0015] As a further technical solution, the first group of water inlet sections is provided with several water inlet sections arranged in an arithmetic manner along its height direction.

[0016] As a further technical solution, the connecting elbow is provided with a filter or a plug.

[0017] The beneficial effects of this utility model are:

[0018] 1. The structural design of the water flow section, transition section and sedimentation section in the grit chamber can optimize the water flow pattern, reduce water turbulence, and facilitate the sedimentation of suspended particles. In addition, planting submerged plants at the bottom of the grit chamber can degrade and absorb the sedimented nutrients.

[0019] 2. The structural design of the flow-through components and inlet section on the first sidewall utilizes the principle of water pressure difference. Only when the upstream water level is higher than the connection point between the elbow and the bend or connecting pipe can a flow-through channel be formed. The reasonable design of the length of the connecting elbow can effectively intercept floating objects in the water. Furthermore, by selecting to install filters or plugs at the connecting elbow, the opening (installation of filters) or closing (installation of plugs) of the flow-through channel can be autonomously controlled, stably regulating the upstream water level, hydraulic retention time, and downstream ecological flow. In addition, the installation of filters can effectively intercept suspended solids in the water, and the downward orientation of the connecting elbow inlet can effectively prevent suspended solids from clogging the filters. Finally, by controlling the height of the inlet section and the inlet height of the flow-through channel, the dead water level can be reduced, and the disturbance of settled particles into the downstream water body can also be prevented.

[0020] This utility model structure, through a sedimentation tank and a flow-through component installed on the first side wall of the sedimentation tank, can ultimately achieve the purpose of comprehensively intercepting floating, suspended, and settled objects carried by upstream water, stabilizing and regulating the upstream water level, and controlling the hydraulic retention time and downstream ecological flow. Attached Figure Description

[0021] Figures 1-3 These are three-dimensional structural schematic diagrams of the ecological flow control integrated pollution interception structure of this utility model from different perspectives;

[0022] Figure 4 This is a side view perspective diagram of a partial ecological flow control integrated pollution interception structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the longitudinal section structure when the first water inlet section is connected to the bend and the first sidewall.

[0024] Figure 6 This is a schematic diagram of the longitudinal section structure when the second water inlet section is connected to the bend and the first sidewall.

[0025] Figure 7 This is a schematic diagram of the longitudinal section structure when the third water inlet section is connected to the bend and the first sidewall.

[0026] Figure 8 This is a schematic diagram of the longitudinal section structure when the fourth water inlet section is connected to the bend and the first side wall.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] Grit chamber 1, first side wall 11, inlet section 111, first group of inlet sections 112, second group of inlet sections 113, third group of inlet sections 114, fourth group of inlet sections 115, water flow section 12, transition section 13, sedimentation section 14, second side wall 15;

[0029] Flow-through component 2, bend 21, connecting elbow 22, connecting pipe 23. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0032] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0033] Example 1

[0034] To overcome the problems of traditional debris interception structures such as single functionality and easy clogging, and to achieve comprehensive interception of floating, suspended and settled objects carried by upstream water, effectively control the flow and ensure the ecological flow needs of downstream, it has the advantages of efficient and comprehensive debris interception, stable regulation and control of flow, and guarantee of downstream ecological flow.

[0035] Taking a comprehensive small watershed management project for agricultural non-point source water pollution around an important water source protection area in a mountainous area as an example, the project includes rural domestic sewage, household livestock and poultry breeding wastewater, agricultural wastewater mainly from farmland planting, and rainwater runoff. Based on local topographic features, this small watershed management project adopts micro-topographic local modification. The aforementioned water is collected centrally through ecological ditches and then sequentially enters a stabilization pond, an ecological pond, and an artificial wetland system for treatment before entering natural water bodies. In this embodiment, the pollution interception structure is mainly installed at the outlet of the ecological ditch, the inlet or outlet of the pond / wetland, and the overflow weir of a small river channel. The following will provide a more detailed description of this utility model's engineering examples with reference to the accompanying drawings.

[0036] This embodiment provides an ecological flow control integrated pollution interception structure, see below. Figures 1-3 The system includes a sedimentation tank 1 and a flow-through assembly 2 disposed on the first sidewall 11 of the sedimentation tank 1. The sedimentation tank 1 is divided into a water flow section 12, a transition section 13, and a sedimentation section 14 connected in sequence. The bottom height of the water flow section 12 is greater than the bottom height of the sedimentation section 14. The longitudinal section of the transition section 13 is an inverted S-shaped structure. The influent flows through the water flow section 12, the transition section 13, and the sedimentation section 14 in sequence and is then discharged into the downstream water body through the flow-through assembly 2.

[0037] The flow-through component 2 is used to discharge the water in the sedimentation tank 1, after filtering out floating matter, suspended matter, sediment, etc., into the downstream water body.

[0038] The arrangement of the water flow section 12, transition section 13, and sedimentation section 14 within the sedimentation tank 1 optimizes the water flow pattern. Specifically, the water flows sequentially from the water flow section 12, the transition section 13, and the sedimentation section 14 to reduce water turbulence and facilitate the settling of suspended particles. Planting submerged plants (not shown in the figure) at the bottom of the sedimentation tank 1 can degrade and absorb the settled nutrients. Furthermore, the longitudinal section of the transition section 13 can also be curved. The dimensions of the sedimentation tank 1 are determined based on a comprehensive design considering factors such as inflow rate, flow capacity, sedimentation, and water purification effect. For example, the sedimentation tank 1 is approximately 5 meters long, 1.8 meters wide, and 0.5 meters deep. The radius of the upper semicircle in the inverted S-shaped transition section 13 is 0.25 meters. The submerged plants planted at the bottom of the sedimentation tank 1 are selected from native submerged plants that are durable, resistant to pollution, have well-developed root systems, good decontamination effects, certain economic value, and are easy to manage. One or more plants can be selected and planted together. The planting density is determined according to the plant type; for example, Elodea nuttallii and Hydrilla verticillata can be used, with a planting density of 6-8 plants / m². 2 ;

[0039] For example, the first sidewall 11 is a retaining wall structure, with a height of 1.3 meters and a width of 1.8 meters, and its bottom is flush with the bottom of the sedimentation tank 1. The retaining wall can be of the type of natural earth wall, masonry wall, or artificial composite wall.

[0040] Furthermore, the height of the second sidewalls 15 symmetrically arranged on both sides of the sedimentation tank 1 is greater than the height of the first sidewall 11. That is, the hexahedral structure has one first sidewall 11, two symmetrically arranged second sidewalls 15, and an opening in the other sidewall for water to enter.

[0041] It can be explained that the flow-through component 2 is embedded in the first side wall 11, and its inlet is connected to the inlet section 111 in the first side wall 11, and its outlet is located on the outer wall of the first side wall 11 to communicate with the downstream water body. This allows the water purified by the sedimentation tank 1 to flow from the inlet of the first side wall 11 through the flow-through component 2 and then into the downstream water body through the outlet of the first side wall 11. In this process, floating objects, suspended solids and other contaminants carried in the sewage are effectively intercepted.

[0042] Further, see Figures 4-7 The opening of the inlet section 111 gradually decreases along the water flow direction. When the water level in the sedimentation tank 1 is higher than that of the inlet section 111, a flow channel is formed due to the principle of water pressure difference, which can effectively intercept floating objects in the sedimentation tank 1. The intercepted floating objects can be manually retrieved and disposed of in the sedimentation tank 1 from time to time. Furthermore, the inlet section 111 is connected to the flow component 2, so that the water that intercepts the floating objects flows through the flow component 2 to the downstream water outside the sedimentation tank 1.

[0043] In the specific implementation process, see Figure 4 , Figure 5 , Figure 7 The flow-through assembly 2 includes several Z-shaped bends 21, several connecting bends 22, and several connecting pipes 23. Each bend 21 has at least one water inlet along its height direction, and the water inlet of each bend 21 is connected to one of the connecting bends 22.

[0044] The water inlets below the top of the bend 21 are all connected to the connecting elbow 22 via a connecting pipe 23. The water inlet of the connecting elbow 22 is connected to the water outlet at the top of the water inlet section 111. The water outlet of the water inlet section 111 is connected to the connecting elbow 22.

[0045] That is, when the water level in the sedimentation tank 1 is higher than the connection point between the connecting elbow 22 and the bend 21 or the connecting pipe 23, the inlet of the connecting elbow 22 is submerged. Due to the principle of high pressure difference, the floating objects in the upstream water cannot enter the inlet of the connecting elbow 22, and the water body with the intercepted suspended objects is discharged into the downstream water body through the outlet of the flow component 2.

[0046] For example, at least two connecting elbows 22 are connected to a single bend 21. If there are three connecting elbows 22, then two more connecting elbows 22 are sequentially spaced on the straight section of the bend 21, and the connecting elbows 22 are connected to the corresponding bend 21 through the connecting pipe 23. Furthermore, the three connecting elbows 22 on the bend 21 share a common longitudinal centerline, so that water at different water levels in the sedimentation tank 1 can be discharged to the downstream water body through the flow assembly 2.

[0047] In the specific implementation process, see Figure 2 The first sidewall 11 has a first set of water inlet sections 112 on its central vertical surface. The first set of water inlet sections 112 has a second set of water inlet sections 113, a third set of water inlet sections 114, and a fourth set of water inlet sections 115 arranged in a symmetrical manner along the left and right sides of the central vertical surface of the first sidewall 11. The bends 21 connected to the second set of water inlet sections 113, the third set of water inlet sections 114, and the fourth set of water inlet sections 115 are arranged in a manner with their heights increasing in an arithmetic manner.

[0048] The height of the bend 21 connected to the first group of water inlet sections 112 is the same as the height of the bend 21 connected to the fourth group of water inlet sections 115.

[0049] The first group of water inlet sections 112 has several water inlet sections 111 arranged in an arithmetic manner along its height direction.

[0050] For example, see Figure 2 , Figures 4-7 The first group of inlet sections 112 has four inlet sections 111, and each inlet section 111 is connected to a connecting elbow 22. The inlet section 111 at the top is connected to the inlet of the bend 21, and the outlet of the bend 21 is connected to the downstream water body outside the first side wall 11. The other three inlet sections 111 are connected to the bend 21 in sequence through the connecting elbow 22 and the connecting pipe 23, so as to realize the discharge of different water levels in the sedimentation tank 1. The four inlet sections 111 in the first group of inlet sections 112 share a common centerline in the height direction.

[0051] At this point, see Figures 6-8 In the first sidewall 11, the second group of water inlet sections 113 and the fourth group of water inlet sections 115 in the direction of the left or right side of the vertical plane are each provided with only one water inlet section 111. The third group of water inlet sections 114 is provided with two water inlet sections 111 and a connecting pipe 23, each connected to a bend pipe 21. The height of the bend pipes 21 connecting the second group of water inlet sections 113, the third group of water inlet sections 114, and the fourth group of water inlet sections 115 is arranged in an arithmetic progression.

[0052] Furthermore, seven bends are arranged on the first sidewall 11. The first group of inlet sections 112 is connected to a bend 21 via a connecting bend 22 and a connecting pipe 23 (it can be noted that the inlet at the top of this bend 21 is directly connected to the connecting bend 22, while the other connecting bends 22 on this bend 21 are all connected via a connecting pipe 23). The second group of inlet sections 113 and the fourth group of inlet sections 115, located on the left and right sides of the vertical plane, are each connected to a bend 21 via a connecting bend 22. The third group of inlet sections 114 and... The first group of water inlet sections 112 are identical, except that they have two water inlet sections 111. The bends 21 connected to each group of water inlet sections (112, 113, 114, 115) have four equal heights projected on the vertical plane, which are 0.2 meters, 0.5 meters, 0.8 meters, and 1.1 meters respectively, and the lateral spacing between each adjacent bend is 0.25 meters. It can be noted that the first sidewall 11 has three water inlet sections 111 and connecting bends 22 arranged at 0.2 meters, 0.5 meters, 0.8 meters, and 1.1 meters.

[0053] By installing filters or plugs (not shown in the figure) on the elbows 21 of the four water inlet sections 111 of equal height on the first sidewall 11, the upstream water level can be adjusted and the hydraulic retention time and downstream flow rate can be controlled. In addition, the water inlet of the elbow 21 faces downward, and the installed filters can effectively prevent suspended matter in the water from clogging the filters. The filter can be a multi-stage filter cylinder with a length of 0.08 meters, for example, three multi-stage filter screens. The plug can be made of metal and connected to the water inlet of the corresponding elbow 21 by threads.

[0054] This utility model is implemented as follows:

[0055] After the water enters the sedimentation tank 1, it passes through the water flow section 12, the transition section 13 and the sedimentation section 14 in sequence. During this process, the water flow pattern can be optimized, the water turbulence can be reduced, and the sedimentation of suspended particles can be facilitated. Submerged plants are planted in the tank, which can degrade and absorb the sedimented nutrients.

[0056] Subsequently, when the water level in sedimentation tank 1 is higher than the connection point between connecting elbow 22 and bend 21 or connecting pipe 23, a filter element installed in connecting elbow 22 forms a flow channel, submerging bend 21 and intercepting floating debris in the water (which can be periodically removed and disposed of). Simultaneously, water flows into connecting elbow 22 with the filter element installed. During this process, the filter element effectively intercepts suspended solids in the water. Furthermore, the downward-facing inlet of connecting elbow 22 effectively prevents suspended solids from clogging the filter screen. Conversely, when the water level in sedimentation tank 1 is higher than the connection point between connecting elbow 22 and bend 21 or connecting pipe 23, a plug installed in connecting elbow 22 closes the flow channel of the inlet section 111. By controlling the number of opening and closing flow channels in the inlet section 111 at different heights, the upstream water level, hydraulic retention time, and downstream flow rate can be precisely controlled.

[0057] In addition, the design of the inlet height of the connecting bend 22 at the bottom of the first side wall 11 is greater than the height of the bottom of the sedimentation section 14 but less than the height of the bottom of the water flow section 12. This design allows for reasonable control of the length of the bend 21 and the height of its inlet according to requirements, thereby reducing the dead water level and preventing settled particles from disturbing and entering the downstream water body again.

[0058] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0059] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0060] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An ecological flow control integrated pollution interception structure, characterized in that, It includes a sedimentation tank (1) and a flow assembly (2) disposed on the first side wall (11) of the sedimentation tank (1); the sedimentation tank (1) is divided into a water flow section (12), a transition section (13) and a sedimentation section (14) connected in sequence. The bottom height of the water flow section (12) is greater than the bottom height of the sedimentation section (14). The longitudinal section of the transition section (13) is an inverted S-shaped structure. The influent passes through the water flow section (12), the transition section (13) and the sedimentation section (14) in sequence and is discharged into the downstream water body from the flow assembly (2).

2. The ecological flow control integrated pollution interception structure according to claim 1, characterized in that, The height of the second sidewall (15) symmetrically arranged on both sides of the sedimentation tank (1) is greater than the height of the first sidewall (11).

3. The ecological flow control integrated pollution interception structure according to claim 1, characterized in that, The flow-through component (2) is embedded in the first side wall (11), and its inlet is connected to the inlet section (111) in the first side wall (11), and its outlet is located on the outer wall of the first side wall (11) to communicate with the downstream water body.

4. The ecological flow control integrated pollution interception structure according to claim 3, characterized in that, The opening of the inlet section (111) gradually decreases along the direction of water flow.

5. The ecological flow control integrated pollution interception structure according to claim 3, characterized in that, The outlet of the inlet section (111) is located at its top to communicate with the flow-through assembly (2).

6. An ecological flow control integrated pollution interception structure according to any one of claims 3-5, characterized in that, The flow-through assembly (2) includes several Z-shaped bends (21), several connecting bends (22), and several connecting pipes (23). Each bend (21) has at least one water inlet along its height direction, and the water inlet of each bend (21) is connected to one of the connecting bends (22). The water inlets below the top of the bend (21) are all connected to the connecting elbow (22) through a connecting pipe (23), and the water inlet of the connecting elbow (22) is connected to the water outlet at the top of the water inlet section (111). The outlet of the inlet section (111) is connected to the connecting elbow (22).

7. The ecological flow control integrated pollution interception structure according to claim 6, characterized in that, The first sidewall (11) has a first set of water inlet sections (112) on its vertical surface. The first set of water inlet sections (112) has a second set of water inlet sections (113), a third set of water inlet sections (114), and a fourth set of water inlet sections (115) arranged in a symmetrical manner along the left and right sides of the vertical surface of the first sidewall (11). The bends (21) connected to the second set of water inlet sections (113), the third set of water inlet sections (114), and the fourth set of water inlet sections (115) are arranged in a manner with equal arithmetic progression. The height of the bends (21) connected to the first set of water inlet sections (112) is the same as the height of the bends (21) connected to the fourth set of water inlet sections (115).

8. The ecological flow control integrated pollution interception structure according to claim 7, characterized in that, The first group of water intake sections (112) has several water intake sections (111) arranged in an arithmetic manner along its height direction.

9. The ecological flow control integrated pollution interception structure according to claim 8, characterized in that, The connecting elbow (22) is equipped with a filter or a plug.

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