Cleaning methods for water distribution devices, water distribution pipes, and filler areas in constructed wetlands

Abstract

This application relates to a water distribution device, a water distribution pipe, and a cleaning method for the filler zones of an constructed wetland. The water distribution device includes a wetland pool, a water distribution pipe, and a moving mechanism. At least two filler zones are spaced apart within the wetland pool, and a water distribution zone is provided between adjacent filler zones. The water distribution pipe is at least partially located within the water distribution zone, and multiple water distribution holes are formed on the portion of the pipe located within the water distribution zone. The water distribution pipe communicates with the adjacent filler zones through these holes. The moving mechanism drives the water distribution pipe to move within the water distribution zone. The moving mechanism drives the water distribution pipe to cover the entire water distribution zone, ensuring uniform water distribution to the adjacent filler zones. Furthermore, because the water distribution pipe is movable, a large number of water distribution pipes are unnecessary; fewer pipes reduce the clogging rate and further improve water distribution uniformity. Simultaneously, the water distribution device of this application eliminates the need for a collection pipe, thus preventing clogging issues.

Description

Technical Field

[0001] This application relates to the field of constructed wetland wastewater treatment technology, and in particular to a method for cleaning the water distribution device, water distribution pipe and filler area of ​​constructed wetlands. Background Technology

[0002] A water distribution system typically includes a main water distribution pipe, branch water distribution pipes, and a collection pipe. Optimizing the water distribution and collection methods is of great significance for the long-term operation of constructed wetlands.

[0003] In related technologies, perforated PVC water distribution is often used to ensure uniform water distribution.

[0004] However, as the water distribution device operates, water collection pipes, water distribution pipes, and artificial wetland substrate inevitably experience water hole blockage. Blocked water distribution devices will affect the uniformity of water distribution. Summary of the Invention

[0005] Therefore, it is necessary to provide a cleaning method for the water distribution device, water distribution pipe and filler area of ​​an artificial wetland to address the problem of water distribution uniformity.

[0006] A water distribution device for an artificial wetland, the water distribution device comprising:

[0007] A wetland pond, wherein at least two filler zones are spaced apart within the wetland pond, and a water distribution zone is provided between two adjacent filler zones;

[0008] A water distribution pipe, at least partially located in the water distribution area, has multiple water distribution holes on the portion of the water distribution pipe located in the water distribution area, and the water distribution pipe communicates with two adjacent packing areas through the water distribution holes; and

[0009] A moving mechanism is used to drive the water distribution pipe to move within the water distribution area, so that the multiple water distribution holes can distribute water to different positions within the movement range of the water distribution pipe.

[0010] In one embodiment, at least two packing zones include a first packing zone and a second packing zone arranged sequentially along the height direction, the first packing zone being located above the water distribution zone, the thickness of the first packing zone being less than the thickness of the second packing zone, and the water distribution pipe moving in the horizontal direction.

[0011] In one embodiment, the particle size of the filler in the first filler region is larger than the particle size of the filler in the second filler region.

[0012] In one embodiment, the wetland pool has a rectangular structure and two wide sidewalls that are arranged opposite each other and extend along the width direction. The two wide sidewalls are respectively provided with grooves extending along the width direction. Each groove is provided with a moving mechanism. The two ends of the water distribution pipe are respectively connected to the corresponding moving mechanism. The moving mechanism is used to drive the water distribution pipe to move along the width direction of the wetland pool.

[0013] In one embodiment, the wetland pool has a circular structure, and an annular groove is formed on the side wall of the wetland pool. The water distribution pipe passes through the central axis of the wetland pool, and both ends of the water distribution pipe extend into the groove. The moving mechanism is used to drive the water distribution pipe to rotate around the central axis of the wetland pool.

[0014] In one embodiment, at least two packing zones include a third packing zone and a fourth packing zone arranged sequentially in a horizontal direction, the third packing zone and the fourth packing zone being symmetrical about the water distribution zone, and the water distribution pipe being movable in the height direction.

[0015] In one embodiment, two opposite grooves are formed on the side wall of the wetland pool, the water distribution area is located between the two grooves, each groove is provided with a moving mechanism, and the two ends of the water distribution pipe are respectively connected to the corresponding moving mechanism.

[0016] In one embodiment, the moving mechanism includes a guide rail disposed in the groove and a movable seat disposed on the guide rail, with both ends of the water distribution pipe connected to the movable seats in the two grooves respectively.

[0017] A method for cleaning the water distribution pipes of a water distribution device in an constructed wetland includes the following steps:

[0018] A cleaning pipe is provided, wherein the cleaning pipe has a plurality of cleaning holes, the diameter of which is smaller than the diameter of the water distribution hole;

[0019] Pass the cleaning pipe through the water distribution pipe, with both ends of the cleaning pipe located outside the water distribution pipe.

[0020] Seal one end of the cleaning pipe and inject high-pressure water or a mixture of water and slow-release oxygen material into the other end, while simultaneously lifting and moving the cleaning pipe in the water distribution pipe.

[0021] Until the blockage stops flowing out of the water distribution pipe.

[0022] A method for cleaning the packing material area of ​​a water distribution device in an constructed wetland.

[0023] A cleaning pipe is provided, wherein a plurality of cleaning holes are provided on the cleaning pipe, the diameter of the cleaning holes is smaller than the diameter of the water distribution holes, the number of cleaning holes is greater than the number of water distribution holes, and the hole spacing between two adjacent cleaning holes is smaller than the hole spacing between two adjacent water distribution holes.

[0024] Replace the water distribution pipe on the moving mechanism with a cleaning pipe;

[0025] One end of the cleaning pipe is blocked, and high-pressure water or a mixture of water and slow-release oxygen material is injected into the other end. At the same time, the moving mechanism drives the cleaning pipe to move or rotate.

[0026] Until the blockage stops being discharged from the packing area.

[0027] The aforementioned method for cleaning the water distribution device, water distribution pipes, and filler zones of constructed wetlands involves at least a portion of the water distribution pipes located within the water distribution zone. These pipes are driven to move via a moving mechanism, allowing them to distribute water at different positions between adjacent filler zones. This ensures the water distribution covers the entire water distribution zone, resulting in uniform water distribution to the two adjacent filler zones. Furthermore, because the water distribution pipes are movable, a large number of pipes are unnecessary, reducing the clogging rate and further improving water distribution uniformity. Additionally, the water distribution device of this application eliminates the need for a collection pipe, thus preventing clogging issues.

[0028] Furthermore, the smaller number of water distribution pipes facilitates quick and easy removal of blockages. Water in the water distribution pipes can flow from the water distribution holes to the packing area, meaning that blockages in the packing area can be cleared directly through the water distribution pipes. Attached Figure Description

[0029] Figure 1 This is a cross-sectional view of a large artificial wetland in one embodiment.

[0030] Figure 2 This is a top view (unfilled) of a large constructed wetland in one embodiment.

[0031] Figure 3 This is a top view of a small artificial wetland in one embodiment.

[0032] Figure 4 This is a cross-sectional view of a small artificial wetland in one embodiment.

[0033] Figure 5 This is a top view of a circular artificial wetland in one embodiment.

[0034] Figure 6 This is a schematic diagram of the structure of the water distribution pipe in one embodiment.

[0035] Reference numerals: 100, wetland pool; 110, first filling zone; 120, second filling zone; 130, groove; 140, third filling zone; 150, fourth filling zone; 160, upper perforated baffle; 170, lower perforated baffle; 200, water distribution pipe; 210, water distribution hole; 300, moving mechanism; 310, moving seat; 320, guide rail; 330, traction line; 340, winding mechanism; 400, cleaning pipe; 410, cleaning hole; 420, sphere. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0042] See Figures 1-6 An embodiment of this application provides a water distribution device for an artificial wetland, comprising: a wetland pool 100, a water distribution pipe 200, and a moving mechanism 300. At least two filler zones are spaced apart within the wetland pool 100, and a water distribution zone is provided between adjacent filler zones. The water distribution pipe 200 is at least partially located within the water distribution zone, and a plurality of water distribution holes 210 are provided on the portion of the water distribution pipe 200 located within the water distribution zone. The water distribution pipe 200 communicates with the two adjacent filler zones through the water distribution holes 210. The moving mechanism 300 drives the water distribution pipe 200 to move within the water distribution zone, so that the plurality of water distribution holes 210 can distribute water to different locations within the movement range of the water distribution pipe 200.

[0043] In this embodiment, at least a portion of the water distribution pipe 200 is located in the water distribution area, and the water distribution pipe 200 is driven to move by the moving mechanism 300, so that the water distribution pipe 200 can distribute water to different positions between two adjacent filling areas. This facilitates the water distribution of the water distribution pipe 200 covering the entire water distribution area, thereby uniformly distributing water to the two adjacent filling areas. Furthermore, since the water distribution pipe 200 is movable, a large number of water distribution pipes 200 are unnecessary. The reduced number of water distribution pipes 200 correspondingly reduces the clogging rate of the water distribution pipes 200, further improving the uniformity of water distribution. Simultaneously, the water distribution device of this application eliminates the water collection pipe, thus preventing the clogging problem of the water collection pipe.

[0044] In addition, the number of water distribution pipes 200 is small, which facilitates quick cleaning of blockages in the water distribution pipes 200. Water in the water distribution pipes 200 can flow from the water distribution holes 210 to the packing area, that is, blockages in the packing area can be cleaned directly through the water distribution pipes 200.

[0045] In some embodiments, combined with Figure 1 , Figure 2 as well as Figure 5 At least two packing zones include a first packing zone 110 and a second packing zone 120 arranged sequentially along the height direction. The first packing zone 110 is located above the water distribution zone. The thickness of the first packing zone 110 is less than the thickness of the second packing zone 120. The water distribution pipe 200 moves in the horizontal direction.

[0046] In this embodiment, when the wetland pond 100 is a large artificial wetland pond 100, the area of ​​the wetland pond 100 is relatively large. At this time, the first filling material area 110 and the second filling material area 120 are arranged sequentially along the height direction, the water distribution area is located between the first filling material area 110 and the second filling material area 120, and the water distribution pipe 200 moves along the horizontal direction to cover the entire area of ​​the wetland pond 100 and prevent dead corners from being distributed with water.

[0047] Furthermore, the thickness of the upper first packing zone 110 is less than the thickness of the lower second packing zone 120, which reduces the weight of the first packing zone 110, thereby reducing the load-bearing requirements on the first packing zone 110 and simplifying the overall structure of the water distribution device. Simultaneously, since the second packing zone 120 is located below the water distribution zone, the water in the distribution zone naturally flows downwards under gravity. Therefore, even if the thickness of the second packing zone 120 is greater than that of the first packing zone 110, the uniformity of water distribution in the second packing zone 120 can still be guaranteed.

[0048] Furthermore, the particle size of the packing material in the first packing zone 110 is larger than the particle size of the packing material in the second packing zone 120.

[0049] In this embodiment, the particle size of the packing material in the first packing area 110 is relatively large, which helps to reduce the load-bearing requirements of the first packing area 110 and also helps to ensure the air permeability of the entire water distribution device. In addition, when the load-bearing structure of the first packing area 110 is damaged, the larger-particle-size packing material located above is less likely to block the packing material located below.

[0050] The first filling zone 110 has an upper perforated baffle 160 at its bottom, and the second filling zone 120 has a lower perforated baffle 170 at its top. Both the upper and lower perforated baffles 160 and 170 have holes, with the hole diameter of the upper perforated baffle 160 being smaller than the particle size of the filler material in the first filling zone 110, and the hole diameter of the lower perforated baffle 170 being smaller than the particle size of the filler material in the second filling zone 120. The area between the upper and lower perforated baffles 160 and 170 is a perforated water distribution area. This means that water in the water distribution pipe 200 can flow directly through the water distribution hole 210 and the upper perforated baffle 160 to the first filling zone 110, and directly through the water distribution hole 210 and the lower perforated baffle 170 to the second filling zone 120.

[0051] In some embodiments, combined with Figure 1 and Figure 2 The wetland pool 100 has a rectangular structure and two wide sidewalls that are arranged opposite each other and extend along the width direction. The two wide sidewalls are respectively provided with grooves 130 extending along the width direction. Each groove 130 is provided with a moving mechanism 300. The two ends of the water distribution pipe 200 are respectively connected to the corresponding moving mechanism 300. The moving mechanism 300 is used to drive the water distribution pipe 200 to move along the width direction of the wetland pool 100.

[0052] In this embodiment, the wetland pond 100 is a large rectangular artificial wetland pond 100, and the length of the water distribution area is equal to the length of the wetland pond 100. The moving mechanism 300 is used to drive the water distribution pipe 200 to move along the width direction of the wetland pond 100, thereby reducing the travel distance of the water distribution pipe 200.

[0053] Of course, in other embodiments, the wetland pool 100 may have two long sidewalls that are arranged opposite each other and extend along the length direction. The two long sidewalls are respectively provided with grooves 130 extending along the length direction. Each groove 130 is provided with a moving mechanism 300. The two ends of the water distribution pipe 200 are respectively connected to the corresponding moving mechanism 300. The moving mechanism 300 is used to drive the water distribution pipe 200 to move along the length direction of the wetland pool 100.

[0054] Specifically, the water distribution pipe 200 is a U-shaped water distribution pipe 200, with its two bent portions extending into the groove 130 to connect with the moving mechanism 300. The top surface elevation of the U-shaped water distribution pipe 200 is not lower than the top surface elevation of the first filling area 110. The bottom surface elevation of the groove 130 is not higher than the bottom surface elevation of the water distribution area, and the top surface elevation of the groove 130 is equal to the top surface elevation of the wall of the wetland pool 100.

[0055] In some embodiments, the moving mechanism 300 includes a guide rail 320 disposed in a groove 130 and a movable seat 310 disposed on the guide rail 320. The two ends of the water distribution pipe 200 are respectively connected to the movable seats 310 in the two grooves 130. The guide rail 320 is centrally disposed in the groove 130, and the two ends of the U-shaped water distribution pipe 200 are detachably connected to the corresponding movable seats 310, for example, by snap-fit ​​or hook-fit.

[0056] In some embodiments, each groove 130 is provided with a winding mechanism 340 at its first end and second end, with the first end located on one side of the second end along the width direction of the wetland pool 100. A motor is provided inside the winding mechanism 340. Two winding mechanisms 340 in the same groove 130 are respectively connected to the two ends of the movable seat 310 located in the groove 130 through a traction line 330.

[0057] When the two motors at the first end of the groove 130 start simultaneously, they cause the two winding mechanisms 340 at the first end to simultaneously wind the traction line 330. That is, the traction line 330 pulls the water distribution pipe 200 towards the first end of the groove 130 via the movable seat 310. At this time, the motors of the two winding mechanisms 340 at the second end of the groove 130 are not working, and the two winding mechanisms 340 at the second end can automatically rotate to unwind the line. When the water distribution pipe 200 moves towards the second end of the groove 130, the winding mechanism 340 at the second end winds the line, and the winding mechanism 340 at the first end unwinds the line.

[0058] In some other embodiments, the guide rail 320 may be a screw, the motor is located at one end of the guide rail 320, and the movable seat 310 is threadedly connected to the guide rail 320. When the motor drives the guide rail 320 to rotate, the movable seat 310 moves on the guide rail 320.

[0059] In some embodiments, combined with Figure 5 The wetland pool 100 has a circular structure. An annular groove 130 is provided on the side wall of the wetland pool 100. The water distribution pipe 200 passes through the central axis of the wetland pool 100, and both ends of the water distribution pipe 200 extend into the groove 130 respectively. The moving mechanism 300 is used to drive the water distribution pipe 200 to rotate around the central axis of the wetland pool 100.

[0060] In this embodiment, the water distribution pipe 200 is a U-shaped water distribution pipe 200, the bottom elevation of the groove 130 is not greater than the bottom elevation of the water distribution area, and the top elevation of the groove 130 is equal to the top elevation of the pool wall.

[0061] In some embodiments, the moving mechanism 300 includes a guide rail 320 disposed in the groove 130 and a moving seat 310 disposed on the guide rail 320, and the two ends of the water distribution pipe 200 are respectively connected to the moving seats 310 in the two grooves 130.

[0062] In some embodiments, the guide rail 320 is an annular guide rail, and a movable seat 310 is provided on the annular guide rail. The U-shaped water distribution pipe 200 is detachably connected to the movable seat 310, for example, by snap-fit ​​or hook-fit. Two winding mechanisms 340 are provided close to each other in the groove 130. A motor is provided in the winding mechanism 340. The two winding mechanisms 340 are respectively connected to the two ends of the movable seat 310 located in the groove 130 through traction lines 330. An annular groove is formed in the annular guide rail 320, and the traction line 330 is disposed in the annular groove.

[0063] When one winding mechanism 340 is winding wire, the other winding mechanism 340 is unwinding wire, thereby causing the movable seat 310 to drive the wiring tube to rotate in one direction (e.g., clockwise); when one winding mechanism 340 is unwinding wire, the other winding mechanism 340 is winding wire, thereby causing the movable seat 310 to drive the wiring tube to rotate in the opposite direction (e.g., counterclockwise).

[0064] In some other embodiments, the movable seat 310 is mounted on the central axis of the wetland pool 100 and is connected to a motor to directly drive the water distribution pipe 200 to rotate.

[0065] In some embodiments, combined with Figure 3 and Figure 4 At least two packing zones include a third packing zone 140 and a fourth packing zone 150 arranged sequentially in the horizontal direction. The third packing zone 140 and the fourth packing zone 150 are symmetrical about the water distribution zone. The water distribution pipe 200 moves in the vertical direction.

[0066] In this embodiment, for a small constructed wetland with a relatively small area, it is sufficient to position the water distribution zone between two filler zones, with the water distribution pipe 200 moving vertically within the distribution zone to achieve uniform water distribution. The vertical water distribution zone, compared to the horizontal one, does not require consideration of the structural pressure-bearing capacity of the upper filler zone, resulting in a relatively simpler structure. Here, "small constructed wetland" is used in contrast to "large constructed wetland."

[0067] Furthermore, the type of packing material in the third packing zone 140 is the same as that in the fourth packing zone 150, in order to improve the uniformity of water distribution in the third packing zone 140 and the fourth packing zone 150.

[0068] Specifically, two opposite grooves 130 are provided on the side wall of the wetland pool 100, and the water distribution area is located between the two grooves 130. Each groove 130 is provided with a moving mechanism 300, and the two ends of the water distribution pipe 200 are respectively connected to the corresponding moving mechanism 300.

[0069] In this embodiment, the shape of the wetland pool 100 can be any symmetrical polygonal structure, such as a rectangle, a regular pentagon, a regular hexagon, or other symmetrical irregular shapes, and the axis of symmetry passes through the water distribution area and the groove 130, so that the water in the water distribution pipe 200 can flow simultaneously into the third filling area 140 and the fourth filling area 150 located on both sides. At the same time, the moving mechanism 300 drives the water distribution pipe 200 to move along the height direction, further increasing the uniformity of water distribution along the height direction.

[0070] The moving mechanism 300 includes a guide rail 320 disposed in the groove 130 and a moving seat 310 disposed on the guide rail 320. The two ends of the water distribution pipe 200 are respectively connected to the moving seats 310 in the two grooves 130.

[0071] In some embodiments, each groove 130 is provided with a winding mechanism 340 at its top. Each winding mechanism 340 is connected to a corresponding movable support via a traction line 330. Both ends of the water distribution pipe 200 are detachably connected to the movable support. A motor is installed inside each winding mechanism 340. When two motors drive the corresponding winding mechanisms 340 to rotate clockwise simultaneously, the two winding mechanisms 340 wind wires simultaneously, thereby driving the water distribution pipe 200 upwards via the movable support. When two motors drive the corresponding winding mechanisms 340 to rotate counterclockwise simultaneously, the two winding mechanisms 340 unwind wires simultaneously, thereby driving the water distribution pipe 200 downwards via the movable support.

[0072] In some other embodiments, the guide rail 320 is a lead screw, and the movable seat 310 is threadedly connected to the lead screw. When the motor drives the lead screw to rotate, the movable seat 310 will move up and down along the lead screw.

[0073] Combination Figure 6 An embodiment of this application also provides a method for cleaning the water distribution pipe 200 of a water distribution device for an artificial wetland, characterized by comprising the following steps:

[0074] A cleaning pipe 400 is provided, and a plurality of cleaning holes 410 are provided on the cleaning pipe 400. The diameter of the cleaning holes 410 is smaller than the diameter of the water distribution holes 210.

[0075] The cleaning pipe 400 is passed through the water distribution pipe 200, and both ends of the cleaning pipe 400 are located outside the water distribution pipe 200.

[0076] Seal one end of the cleaning pipe 400 and inject high-pressure water or a mixture of water and slow-release oxygen material into the other end. At the same time, lift and move the cleaning pipe 400 in the water distribution pipe 200.

[0077] The blockage will continue to be discharged from the water distribution pipe 200 until it stops.

[0078] In this embodiment, the cleaning method of the water distribution pipe 200 described above is applicable to any constructed wetland pool 100 with a water distribution pipe 200, including large constructed wetland pools 100, small constructed wetland pools 100, and circular constructed wetland pools 100. Before cleaning, a cleaning pipe 400 is prepared. The cleaning pipe 400 can be a PE pipe with relatively high bending capacity. A steel ball is inserted into the opening at the front end of the PE pipe. The diameter of the PE pipe is smaller than the diameter of the U-shaped water distribution pipe 200. The PE pipe is inserted into the water inlet end of the U-shaped water distribution pipe 200 and pulled out from the other end of the U-shaped water distribution pipe 200. Then, the steel ball is removed. The PE pipe is provided with dense cleaning holes 410. The diameter of the cleaning holes 410 is smaller than the diameter of the water distribution holes 210 on the U-shaped water distribution pipe 200. During cleaning, firmly seal the front opening of the PE pipe, inject high-pressure water into the end opening, and continuously pull the PE pipe up and down and move it left and right to flush the blockage in the U-shaped water distribution pipe 200 under high pressure. Observe the outflow of blockage in the U-shaped water distribution pipe 200 with the naked eye at all times. When the number and size of the blockage are found to be gradually decreasing, the water pressure can be maintained or reduced. When the number and size of the blockage are found to be gradually increasing, the water pressure can be maintained or increased until no obvious blockage is seen in the water flow discharged from the U-shaped water distribution pipe 200. At this time, the cleaning of the blockage in the U-shaped water distribution pipe 200 is completed. Stop the high-pressure flushing and pull out the PE pipe.

[0079] Furthermore, the slow-release oxygen material uses macroporous weakly acidic acrylic cation exchange resin as an encapsulating agent to encapsulate calcium peroxide. Using a mixture of water and the slow-release oxygen material can increase the oxygen content of wetlands and reduce the formation of bioclogging.

[0080] One embodiment of this application also provides a method for cleaning the filler area of ​​a water distribution device in an constructed wetland, characterized in that...

[0081] A cleaning pipe 400 is provided, and a plurality of cleaning holes 410 are provided on the cleaning pipe 400. The diameter of the cleaning hole 410 is smaller than the diameter of the water distribution hole 210, the number of cleaning holes 410 is greater than the number of water distribution holes 210, and the hole spacing between two adjacent cleaning holes 410 is smaller than the hole spacing between two adjacent water distribution holes 210.

[0082] Replace the water distribution pipe 200 on the moving mechanism 300 with the cleaning pipe 400;

[0083] One end of the cleaning pipe 400 is blocked, and high-pressure water or a mixture of water and slow-release oxygen material is injected into the other end. At the same time, the moving mechanism 300 drives the cleaning pipe 400 to move or rotate.

[0084] Until the blockage stops being discharged from the packing area.

[0085] The cleaning method for the packing area of ​​the above-mentioned water distribution device is applicable to any constructed wetland pool 100 with a movable water distribution pipe 200, including large constructed wetland pools 100, small constructed wetland pools 100, and circular constructed wetland pools 100. Taking a circular constructed wetland pool 100 as an example: the cleaning pipe 400 is a PE pipe with relatively high bending capacity. The U-shaped water distribution pipe 200 is removed from the movable seat 310 and moved to one side as a whole. The front end of the PE pipe enters the constructed wetland from the top of the inlet side groove 130, passes through the water distribution layer, and is pulled out from the top of the outlet side groove 130. After straightening along the diameter of the circular constructed wetland, the two ends of the PE pipe are fixed to the movable seat 310 respectively. The opening at the front end of the PE pipe is sealed firmly, and high-pressure water is injected into the end opening. The movable seat 310 moves the two ends of the PE pipe. The PE pipe is moved along guide rail 320 to rotate in the circular artificial wetland for high-pressure flushing of the packing layer. The outflow of blockages in groove 130 is observed visually at all times. When the number and size of blockages are gradually decreasing, the water pressure can be maintained or appropriately reduced. When the number and size of blockages are gradually increasing, the water pressure can be maintained or appropriately increased until no obvious blockages are seen in the water discharged from groove 130. At this point, the cleaning of blockages in U-shaped water distribution pipe 200 is complete. High-pressure flushing is stopped and the PE pipe is pulled out.

[0086] Furthermore, the slow-release oxygen material uses macroporous weakly acidic acrylic cation exchange resin as an encapsulating agent to encapsulate calcium peroxide. Using a mixture of water and the slow-release oxygen material can increase the oxygen content of wetlands and reduce the formation of bioclogging.

[0087] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A water distribution device for an artificial wetland, characterized in that, The water distribution device includes: A wetland pond, wherein at least two filler zones are spaced apart within the wetland pond, and a water distribution zone is provided between two adjacent filler zones; A water distribution pipe, at least partially located in the water distribution area, has multiple water distribution holes on the portion of the water distribution pipe located in the water distribution area, and the water distribution pipe communicates with two adjacent packing areas through the multiple water distribution holes; and A moving mechanism is used to drive the water distribution pipe to move within the water distribution area, so that the multiple water distribution holes can distribute water to different positions within the movement range of the water distribution pipe. At least two packing zones include a first packing zone and a second packing zone arranged sequentially along the height direction. The first packing zone is located above the water distribution zone. The thickness of the first packing zone is less than the thickness of the second packing zone. The water distribution pipe moves horizontally. An upper perforated baffle is provided at the bottom of the first packing zone, and a lower perforated baffle is provided at the top of the second packing zone. Holes are respectively provided on the upper and lower perforated baffles. The diameter of the holes on the upper perforated baffle is smaller than the particle size of the packing material in the first packing zone, and the diameter of the holes on the lower perforated baffle is smaller than the particle size of the packing material in the second packing zone. The area between the upper and lower perforated baffles is a hollow water distribution zone.

2. The water distribution device for an artificial wetland according to claim 1, characterized in that, The particle size of the packing material in the first packing zone is larger than that of the packing material in the second packing zone.

3. The water distribution device for an artificial wetland according to claim 1, characterized in that, The wetland pool has a rectangular structure and two wide sidewalls that are arranged opposite each other and extend along the width direction. Each of the two wide sidewalls has a groove extending along the width direction. Each groove is provided with a moving mechanism. The two ends of the water distribution pipe are respectively connected to the corresponding moving mechanism. The moving mechanism is used to drive the water distribution pipe to move along the width direction of the wetland pool.

4. The water distribution device for an artificial wetland according to claim 1, characterized in that, The wetland pool has a circular structure, and an annular groove is formed on the side wall of the wetland pool. The water distribution pipe passes through the central axis of the wetland pool, and both ends of the water distribution pipe extend into the groove. The moving mechanism is used to drive the water distribution pipe to rotate around the central axis of the wetland pool.

5. The water distribution device for an artificial wetland according to claim 1, characterized in that, At least two packing zones include a third packing zone and a fourth packing zone arranged sequentially in the horizontal direction, the third packing zone and the fourth packing zone being symmetrical about the water distribution zone, and the water distribution pipe moving in the height direction.

6. The water distribution device for an artificial wetland according to claim 5, characterized in that, The wetland pool has two opposite grooves on its side wall. The water distribution area is located between the two grooves. Each groove is equipped with a moving mechanism. The two ends of the water distribution pipe are connected to the corresponding moving mechanism.

7. The water distribution device for an artificial wetland according to any one of claims 3, 4, and 6, characterized in that, The moving mechanism includes a guide rail disposed in the groove and a movable seat disposed on the guide rail, and the two ends of the water distribution pipe are respectively connected to the movable seats in the two grooves.

8. A method for cleaning the water distribution pipe of the water distribution device of the constructed wetland according to any one of claims 1-7, characterized in that, Includes the following steps: A cleaning pipe is provided, wherein the cleaning pipe has a plurality of cleaning holes, the diameter of which is smaller than the diameter of the water distribution hole; Pass the cleaning pipe through the water distribution pipe, with both ends of the cleaning pipe located outside the water distribution pipe. Seal one end of the cleaning pipe and inject high-pressure water or a mixture of water and slow-release oxygen material into the other end, while simultaneously lifting and moving the cleaning pipe in the water distribution pipe. Until the blockage stops flowing out of the water distribution pipe.

9. A method for cleaning the filler area of ​​the water distribution device of an artificial wetland according to any one of claims 1-7, characterized in that, Includes the following steps: A cleaning pipe is provided, wherein a plurality of cleaning holes are provided on the cleaning pipe, the diameter of the cleaning holes is smaller than the diameter of the water distribution holes, the number of cleaning holes is greater than the number of water distribution holes, and the hole spacing between two adjacent cleaning holes is smaller than the hole spacing between two adjacent water distribution holes. Replace the water distribution pipe on the moving mechanism with a cleaning pipe; One end of the cleaning pipe is blocked, and high-pressure water or a mixture of water and slow-release oxygen material is injected into the other end. At the same time, the moving mechanism drives the cleaning pipe to move or rotate. Until the blockage stops being discharged from the packing area.

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