Modularized filter bed

Abstract

The utility model discloses a modular filter bed which comprises at least one filter bed, the filter bed comprises a first filter bed and a second filter bed arranged on the first filter bed, and the second filter bed is movably arranged; a water inlet header pipe and a water outlet pipe arranged on one side of the first filter bed are arranged in the first filter bed; a water inlet system is arranged between the first filter bed and the second filter bed, a nano aeration disc is arranged above the water inlet system, and a breather pipe is connected with the nano aeration disc; external incoming water is communicated with the water inlet end of the water inlet header pipe which is communicated with the water inlet system; external water overflows to the first filter bed after being filtered in the second filter bed. An existing ecological filter bed is modularized, the size of a single filter bed is greatly reduced, when maintenance is needed, a specific module can be positioned, and the maintenance workload is greatly reduced; a standby module is filled, when a single module breaks down and stops using, the single module can be shut down independently, and using of other modules is not affected; the multi-module connection design fully considers the use performance of the modules.

Description

Technical Field

[0001] This application relates to the field of ecological water treatment technology, and in particular to a modular filter bed. Background Technology

[0002] Existing ecological filter beds are mostly integrated biological filter beds that achieve ecological purification as a whole. During the use of biological filter beds, malfunctions may occur and maintenance is required. However, the workload of excavating and backfilling the inside of the biological filter bed is large, and it is not easy to locate the specific problem point for maintenance.

[0003] Modularizing existing ecological filter beds can significantly reduce the volume of a single filter bed, but there are also related technical issues that need to be studied. For example, when a biological filter bed is modularized, there are issues such as the need for stable physical splicing between the modules, the treatment effect, and the functionality of the modules after splicing, such as water inlet, air inlet, and water outlet. When problems occur and maintenance is required, there are issues such as the disassembly and reinstallation of each module. Summary of the Invention

[0004] To address the aforementioned problems, this application provides a modular filter bed.

[0005] To achieve the above objectives, this application provides a modular filter bed, comprising at least one filter bed;

[0006] The filter bed includes a first filter bed and a second filter bed disposed on the first filter bed, wherein the second filter bed is movable.

[0007] A main inlet pipe and an outlet pipe are provided inside the first filter bed; a water inlet system is provided between the first filter bed and the second filter bed, and a nano-aeration disc is provided above the water inlet system, and an air vent is connected to the nano-aeration disc; external water is connected to the inlet end of the main inlet pipe, and the main inlet pipe is connected to the water inlet system.

[0008] External water is filtered in the second filter bed and then overflows into the first filter bed.

[0009] More specifically, the second filter bed includes a filter media housing, modular filter media disposed within the filter media housing, a filter media layer plate disposed at the bottom of the modular filter media, and a lifting hook disposed at the top of the filter media housing, with water passage holes formed on the filter media layer plate.

[0010] More specifically, the water inlet system includes a first water inlet pipe, a second connecting water inlet pipe connected to one end of the first water inlet pipe, and a third water inlet pipe connected to the other end of the first water inlet pipe, wherein the first water inlet pipe, the second water inlet pipe, and the third water inlet pipe are connected in an I-shape.

[0011] More specifically, the first, second, and third water inlet pipes are each provided with a number of water outlet holes on the surface near the module filter material. The number of water outlet holes are arranged along the length of the water inlet pipes, and external water is sprayed onto the module filter material from the water outlet holes.

[0012] More specifically, the venting pipe includes a main venting pipe and several branch venting pipes connected to the main venting pipe. The branch venting pipes connect the main venting pipe to the nano-aeration disc and are disposed within the module filter media.

[0013] More specifically, the nano-aeration disc is configured with a double helix structure, which is positioned above the water inlet system, and the nano-aeration disc is provided with a number of air outlet holes.

[0014] More specifically, an inlet connecting pipe is provided on the main inlet pipe, and the inlet connecting pipe connects the main inlet pipe to the inlet system.

[0015] More specifically, the bottom of the first filter bed is inclined, the water outlet pipe is located on the lower side, and a water collection hole is opened on the water outlet pipe. The filtered water enters the water outlet pipe through the water collection hole.

[0016] More specifically, a placement space is formed between the top of the first filter bed and the bottom of the second filter bed, and the water inlet system and the nano aeration disc are both arranged in the placement space. A release valve is provided on the side wall of the placement space.

[0017] More specifically, a support foot is provided at the bottom of the exterior of the second filter bed, and the second filter bed is placed on the first filter bed by the support foot.

[0018] The beneficial effects of this application for a modular filter bed are as follows: This utility model modularizes existing ecological filter beds, greatly reducing the volume of a single filter bed. When the biological filter bed malfunctions and requires maintenance, the specific module can be located and hoisted separately for maintenance at an off-site location, significantly reducing the workload of maintenance. Simultaneously, a spare module can be added without affecting the normal use of the entire biological filter bed. In the design of the connection between multiple modules, the performance of the modules is fully considered, such as the physical structure of water inlet, air inlet, and water outlet. When a single module malfunctions and stops working, it can be shut down individually without affecting the use of other modules. The second filter bed of the modular wetland is designed as a vertical flow wetland, and the first filter bed is designed as a horizontal flow wetland. By combining two different wetland types in the same site, the land area occupied by the wetland is greatly reduced. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the modular combination planar structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the modular unit planar structure of this utility model;

[0021] Figure 3 This is a schematic cross-sectional view of the modular assembly structure of this utility model;

[0022] Figure 4 This is a cross-sectional view of a single module of this utility model;

[0023] In the diagram: 1. First filter bed; 11. First filter bed wall; 12. First filter media; 13. Main inlet pipe; 14. Inlet connecting pipe; 15. Outlet pipe; 151. Water collection hole; 2. Second filter bed; 21. Second filter bed shell; 22. Modular filter media; 23. Filter media layer plate; 231. Water passage hole; 24. Water inlet system; 241. First inlet pipe; 242. Second inlet pipe; 243. Third inlet pipe; 244. Outlet hole; 25. Nano aeration disc; 251. Air outlet; 26. Air pipe; 261. Main air pipe; 262. Branch air pipe; 27. Release valve; 28. Support leg; 29. ​​Lifting hook. Detailed Implementation

[0024] like Figures 1-4 As shown, a modular filter bed includes at least one sub-filter bed, each sub-filter bed including a first filter bed 1, a second filter bed 2, an inlet manifold 13, an air vent 26, and an outlet pipe 15. The filter bed receives external water through the inlet manifold 13 and sends it to the second filter bed 2 for treatment. The treated water flows to the first filter bed 1 for further treatment, and the water flowing out of the first filter bed 1 is collected by the outlet pipe 15.

[0025] like Figure 3 , Figure 4As shown, a main inlet pipe 13 is provided inside the first filter bed 1, and an outlet pipe 15 is provided at the bottom of one side of the first filter bed 1. The first filter bed 1 can further treat the water effluent from the second filter bed 2, which is the last treatment process of the sub-filters. The water flowing out of the first filter bed 1 can be directly collected and discharged by the outlet pipe 15. External water enters the sub-filters through the main inlet pipe 13 for treatment. The main inlet pipe 13 is the main pipeline for transporting external water. The main inlet pipe 13 connects each sub-filter in the modular filter bed, and uniformly transports external water to each sub-filter. When all the sub-filters are arranged in a row, the main inlet pipe 13 can connect to each sub-filter, but when the sub-filters are arranged in a row, the main inlet pipe 13 can connect to each sub-filter. When the filter bed is arranged in two or more rows, a single main inlet pipe 13 cannot meet the water supply needs of multiple rows of filter beds. Therefore, the number of main inlet pipes 13 needs to be set according to the number of filter beds. When the filter bed is arranged in two rows, the main inlet pipe 13 is divided into a first main inlet pipe and a second main inlet pipe. The inlet ends of the first main inlet pipe and the second main inlet pipe can receive water simultaneously or alternately. When the filter bed is arranged in three rows, the main inlet pipe 13 is divided into a first main inlet pipe, a second main inlet pipe, and a third main inlet pipe. The inlet ends of the first main inlet pipe, the second main inlet pipe, and the third main inlet pipe can receive water simultaneously or alternately. In this scheme, the filter bed is arranged in two rows. The outlet pipe 15 is used to collect the water filtered by the filter bed and discharge the water uniformly.

[0026] The first filter bed 1 is located at the bottom of the sub-filter beds. The first filter bed 1 includes a first filter bed wall 11 and a first filter media 12 disposed inside the first filter bed wall 11. The thickness of the first filter bed 1 can be set as needed, but it must ensure that the constant water level of the first filter bed 1 is below the top of the filter bed shell of the second filter bed 2. In this design, the height of the first filter bed wall 11 is set to be lower than the height of the second filter bed 2 but higher than 50 cm, and the thickness of the first filter media 12 is 30 cm. The water treated by the second filter bed 2 is further treated in the first filter bed 1. The water overflows from the top of the second filter bed 2 into the first filter bed 1 and finally flows out from the bottom of the filter media of the first filter bed 1, completing the purification process. Each sub-filter bed can have one first filter bed 1, or an entire first filter bed 1 can be laid at the bottom of the entire modular filter bed. In this design, an entire first filter bed 1 is used.

[0027] Water flowing out of the first filter bed 1 is discharged from the modular filter bed through the outlet pipe 15. The outlet pipe 15 is located on the side of the modular filter bed away from the inlet of the inlet pipe. To ensure water collection, the side of the outlet pipe 15 is lower than the inlet side. Several water collection holes 151 are provided on the outlet pipe 15. Water treated in the first filter bed 1 enters the outlet pipe 15 through the water collection holes 151 and is discharged through the outlet pipe 15. To ensure smooth water flow into the water collection holes 151 and prevent small particles of filter media from entering or clogging them, large stones are placed around the outlet pipe 15. These large stones surround the outlet pipe 15, preventing small particles of filter media from entering the water collection holes 151 and ensuring unobstructed water flow. Regardless of how many filter beds are operating in the modular filter bed, all purified water is discharged through the outlet pipe 15.

[0028] The main inlet pipe 13 is laid at the bottom of the first filter bed 1, covering the entire modular filter bed. The inlet of the main inlet pipe 13 is connected to external water, and the outlet of the main inlet pipe 13 is connected to the water inlet system 24. External water enters the water inlet system 24 through the main inlet pipe 13 and then enters the second filter bed 2 for treatment. Since the modular filter bed includes at least one sub-filter bed, in order to ensure that each sub-filter bed can receive water, the number of outlets of the main inlet pipe 13 is consistent with the maximum number of sub-filter beds in the modular filter bed.

[0029] To better ensure the connection between the main water inlet pipe 13 and the water inlet system 24, several water inlet connecting pipes 14 are provided on the main water inlet pipe 13. The water inlet connecting pipes 14 extend to the second filter bed 2 and connect to the water inlet system 24 inside it. One end of the water inlet connecting pipe 14 is connected to the main water inlet pipe 13 and the other end is connected to the water inlet system 24. External water is evenly transported from the main water inlet pipe 13 to the water inlet connecting pipe 14 and then to the water inlet system 24 through the water inlet connecting pipe 14. To ensure that all sub-filters within the modular filter bed can operate normally when needed, the number of inlet connection pipes 14 is consistent with the maximum number of sub-filters within the modular filter bed. External water enters each inlet connection pipe 14 through the main inlet pipe 13, and then enters each inlet system 24 through the inlet connection pipe 14. All sub-filters within the same modular filter bed can be used and stopped simultaneously. However, if a sub-filter malfunctions and requires repair, the water in the first filter bed 1 of the malfunctioning sub-filter bed is drained, followed by the water in the second filter bed 2. The second filter bed 2 of the malfunctioning sub-filter bed is then removed, and a plug is installed at the outlet of the corresponding inlet connection pipe 14 to prevent further water leakage. The other sub-filters can then resume normal operation. Alternatively, inlet valves can be installed on the corresponding inlet connection pipes to control whether water flows from the inlet connection pipe 14. Since the inlet connection pipes 14 are located at the bottom of the filter bed, opening or closing the inlet valves is inconvenient; therefore, the inlet valves are electric valves.

[0030] The air pipe 26 is installed inside the second filter bed 2, and a water inlet system 24 is installed at the bottom of the second filter bed 2. A nano aeration disc 25 is installed above the water inlet system 24.

[0031] like Figure 1 , Figure 2 , Figure 3 as well as Figure 4As shown, the second filter bed 2 includes a second filter bed shell 21, modular filter media 22 disposed within the second filter bed shell 21, and filter media plates 23 supporting the modular filter media 22. After the modular filter media 22 is installed, a portion of the space remains at the bottom of the second filter bed shell 21 for placement. The water inlet system 24 and the nano-aeration disc 25 are both disposed within this space. The modular filter media 22 is arranged along the height of the second filter bed shell 21. The second filter media shell 21 has an opening at the top and is enclosed at the bottom and around the perimeter, completely enclosing the modular filter media 22 within the second filter bed shell 21 for easy movement. External water enters the modular filter media 22 from the bottom, is treated from bottom to top, and then overflows from the top. The filter media plate 23 is used to support the module filter media 22. The filter media plate 23 is made of high-strength composite material. In order to ensure that water can enter the module filter media 22, water passage holes 231 are opened on the filter media plate 23. The size of the water passage holes 231 can be set according to the diameter of the filter media particles. In this solution, the water passage holes 231 are set to a diameter of 0.5 cm.

[0032] The modular filter media 22 is the core of the modular filter bed, and pollutants are treated through the biofilm formed on the modular filter media 22. The modular filter media 22 can be a single layer or multiple layers, and can be set and proportioned according to different influent water characteristics.

[0033] like Figure 1 , Figure 2 As shown, the water inlet system 24 is located within the placement space near the water inlet connecting pipe. The water inlet system 24 includes a first water inlet pipe 241, a second water inlet pipe 242 connected to one end of the first water inlet pipe 241, and a third water inlet pipe 243 connected to the other end of the first water inlet pipe 241. The first water inlet pipe 241, the second water inlet pipe 242, and the third water inlet pipe 243 are connected in an I-shape. Because the water inlet connecting pipe 14 is located in the middle of each filter bed, the inlet of the first water inlet pipe 241 is located in the middle of the first water inlet pipe 241. The outlet of the water inlet connecting pipe 14 is connected to the inlet of the first water inlet pipe 241. External water enters through the inlet of the first water inlet pipe 241 and flows into the second water inlet pipe 242 and the third water inlet pipe 243. The water outlet can be opened on the second water inlet pipe 242 and / or the third water inlet pipe 243, and external water flows out from the water outlet and sprays onto the module filter media 22. Alternatively, several water outlet holes 244 can be opened on the first, second and third water inlet pipes 243, and external water is sprayed onto the module filter media 22 from the several water outlet holes 244. In this solution, several water outlet holes 244 are opened on the first, second and third water inlet pipes 243.

[0034] A plurality of water outlet holes 244 are provided on each water inlet pipe of the water inlet system 24. The plurality of water outlet holes 244 are evenly opened along the length of the water inlet pipe and are set toward the module filter media 22. In order to ensure water output efficiency, the water outlet holes 244 are arranged in two rows.

[0035] like Figure 1 , Figure 2 As shown, to increase the oxygen content of the incoming water, a nano-aeration disc 25 is installed above the water inlet system 24. The nano-aeration disc 25 is positioned on the side of the placement space near the module filter media 22. When the incoming water is sprayed out through the outlet hole 244, it combines with the gas released inside the nano-aeration disc 25. The nano-aeration disc 25 is a double-spiral, uninterrupted tubular structure, coiled at the bottom of the module filter media 22. Its size matches the size of the water inlet system 24, ensuring that the water sprayed from the outlet hole 244 can combine with the gas. In this design, the maximum outer diameter of the nano-aeration disc 25 is equal to the maximum length of the water inlet system 24. To ensure gas release, several air outlet holes 251 are provided on the nano-aeration disc 25. Gas is released from the air outlet holes 251 and combines with the water. The air outlet holes 251 are evenly distributed on the nano-aeration disc 25, ensuring uniform combination of water and gas sprayed from the outlet hole 244.

[0036] The nano-aeration disc 25 is configured with a double-helix structure, including a first spiral tube and a second spiral tube. The air inlets of both the first and second spiral tubes are connected to the vent pipe 26. To facilitate air intake into the two spiral tubes, a T-junction is provided to connect the first spiral tube, the second spiral tube, and the vent pipe 26. Gas enters into both spiral tubes simultaneously through the air outlet of the vent pipe 26, and both spiral tubes simultaneously deliver gas towards the center. The connection method of the first spiral tube, the second spiral tube, and the vent pipe 26 is not limited, as long as the aeration function is achieved. When two spiral tubes are set, their individual lengths will be shorter than when a single spiral tube is set, which can avoid the problem of the spiral tube being too long or the gas not being able to reach the top due to insufficient pressure.

[0037] The gas within the nano-aeration disc 25 is transported through the vent pipe 26. The vent pipe 26 includes a main vent pipe 261 and several branch vent pipes 262 connected to the main vent pipe 261. Each branch vent pipe 262 extends into the modular filter media 22, and each branch vent pipe 262 corresponds to a module filter media 22. A nano-aeration disc 25 is provided inside each sub-filter bed. The branch vent pipe 262 located within the module filter media 22 is connected to the nano-aeration disc 25 at its bottom, and its other end is connected to the main vent pipe 261. The connection method between the branch vent pipe 262 and the nano-aeration disc 25 is not fixed; in this design, a quick-release connector is used. The main vent pipe 261 covers the entire modular filter bed, uniformly supplying air to each branch vent pipe 262.

[0038] The vent pipe 26 is made of polyethylene, which has good flexibility and elasticity.

[0039] To ensure that all sub-filters within the modular filter bed can be used normally when needed, the number of vent branch pipes 262 is consistent with the maximum number of sub-filters within the modular filter bed. Connection ports are set on the main vent pipe according to the maximum number of vent branch pipes 262. Sometimes, some sub-filters within the modular filter bed may not be used, but the main vent pipe will still supply air. In this case, after the gas enters from the main vent pipe 261, it will be directly discharged from the connection port of the location where no filter bed is installed, resulting in waste. Therefore, to ensure that no gas is wasted due to the unused sub-filters, a closed pipe is installed at the connection port of the corresponding main vent pipe 261.

[0040] When maintaining the inlet system 24 and the nano-aeration disc 25, the entire second filter bed 2 needs to be disassembled, which is time-consuming and labor-intensive. To facilitate maintenance, a release valve 27 is installed on the side wall of the placement space. After opening the release valve 27, all the water in the second filter bed 2 can be drained, allowing for inspection and maintenance of the inlet system 24, the nano-aeration disc 25, and the filter media plate 23. Simultaneously, draining all the water from the second filter bed 2 facilitates its movement. The release valve 27 is relatively large, allowing maintenance personnel to reach in and inspect the various pipes.

[0041] To facilitate the placement of the second filter bed 2, support feet 28 are provided at the bottom of the second filter bed 2. The second filter bed 2 passes through the first filter media 12 and is placed on the bottom wall of the first filter bed 1 via the support feet 28. The support feet 28 are screw-rotatable structures, and the height of each support foot 28 can be finely adjusted by rotating it to achieve leveling of the second filter bed 2. The bottom of the support feet 28 is a triangular support plate, which reduces pressure by increasing the contact area. The second filter bed 2 can be placed at the bottom of the filter bed or on the first filter bed 1 via the support feet 28. When the second filter bed 2 is moved, the support feet 28 move accordingly.

[0042] Several lifting hooks 29 are provided on the top of the second filter bed 2 for easy movement. Furthermore, a lifting hook 29 is designed on each side of the module housing. The lifting hooks 29 are shaped like an inverted "U" and are connected to the module housing. The lifting hooks 29 allow the second filter bed 2 to be lifted and moved mechanically.

[0043] Based on constructed wetlands, this structure combines vertical and horizontal flow through a unique modular design to maximize pollutant treatment. The influent treatment process is bottom-up.

[0044] When water arrives, it enters the modular filter bed through the main inlet pipe 13 placed at the bottom of the filter bed. External water enters the inlet connecting pipe 14 through the main inlet pipe 13, and then enters the inlet system 24 through the inlet connecting pipe 14. The inlet system 24 sprays the incoming water onto the modular filter media 22, allowing the incoming water to enter the second filter bed 2. The incoming water is evenly distributed through the I-shaped inlet system 24 located at the bottom of the second filter bed 2, and then comes into contact with the nano-aeration disc 25 above, increasing the oxygen content.

[0045] Water sprayed through the inlet system 24 passes through the perforated filter media layer 23 and enters the module filter media 22, where contaminants are removed. As the inlet water increases, the water level in the second filter bed 2 rises. During this rise, contaminants are removed as the water flows through the module filter media 22, and the treated clean water is at the top of the module filter media 22. As the water level continues to rise, the treated water overflows from the perimeter of the second filter bed 2 and enters the first filter bed 1. The water overflowing from the second filter bed 2 is collected by the first filter bed 1, forming a horizontal flow for further treatment of contaminants. A water outlet pipe 15 is provided at the bottom of one side of the filter bed. The water collected in the filter bed is discharged through the water outlet pipe 15, completing the entire treatment cycle.

Claims

1. A modular filter bed, characterized in that: Includes at least one filter bed; The filter bed includes a first filter bed (1) and a second filter bed (2) disposed on the first filter bed (1), wherein the second filter bed (2) is movably disposed; A main inlet pipe (13) and an outlet pipe (15) are provided in the first filter bed (1) on one side of the first filter bed (1); a water inlet system (24) is provided between the first filter bed (1) and the second filter bed (2), a nano aeration disc (25) is provided above the water inlet system (24), and an air vent pipe (26) is connected to the nano aeration disc (25); external water is connected to the inlet end of the main inlet pipe (13), and the main inlet pipe (13) is connected to the water inlet system (24); External water is filtered in the second filter bed (2) and then overflows to the first filter bed (1).

2. The modular filter bed according to claim 1, characterized in that: The second filter bed (2) includes a second filter bed housing (21), a modular filter media (22) disposed in the second filter bed housing (21), a filter media plate (23) disposed at the bottom of the modular filter media (22), and a lifting hook (29) disposed at the top of the second filter bed housing (21). Water passage holes (231) are provided on the filter media plate (23).

3. The modular filter bed according to claim 2, characterized in that: The water inlet system (24) includes a first water inlet pipe (241), a second water inlet pipe (242) connected to one end of the first water inlet pipe (241), and a third water inlet pipe (243) connected to the other end of the first water inlet pipe (241). The first water inlet pipe (241), the second water inlet pipe (242), and the third water inlet pipe (243) are connected in an I-shape.

4. The modular filter bed according to claim 3, characterized in that: The first water inlet pipe (241), the second water inlet pipe (242) and the third water inlet pipe (243) are all provided with a plurality of water outlet holes (244) on the surface near the module filter material (22). The plurality of water outlet holes (244) are arranged along the length direction of the water inlet pipe, and external water is sprayed from the water outlet holes (244) onto the module filter material (22).

5. The modular filter bed according to claim 2, characterized in that: The ventilation pipe (26) includes a main ventilation pipe (261) and a plurality of ventilation branch pipes (262) connected to the main ventilation pipe (261). The ventilation branch pipes (262) connect the main ventilation pipe (261) and the nano aeration disc (25). The ventilation branch pipes (262) are disposed inside the module filter material (22).

6. The modular filter bed according to claim 1, characterized in that: The nano aeration disc (25) is configured with a double helix structure, which is located above the water inlet system (24). Several air outlet holes (251) are provided on the nano aeration disc (25).

7. The modular filter bed according to claim 1, characterized in that: An inlet connection pipe (14) is provided on the main inlet pipe (13), and the inlet connection pipe (14) connects the main inlet pipe (13) to the inlet system (24).

8. The modular filter bed according to claim 1, characterized in that: The first filter bed (1) is inclined at the bottom, and the water outlet pipe (15) is located on the lower side. A water collection hole (151) is provided on the water outlet pipe (15), and the filtered water enters the water outlet pipe (15) through the water collection hole (151).

9. The modular filter bed according to claim 1, characterized in that: A placement space is formed between the top of the first filter bed (1) and the bottom of the second filter bed (2). The water inlet system (24) and the nano aeration disc (25) are both located in the placement space. A release valve (27) is provided on the side wall of the placement space.

10. The modular filter bed according to claim 1, characterized in that: A support foot (28) is provided at the bottom outside the second filter bed (2), and the second filter bed (2) is placed on the first filter bed (1) by means of the support foot (28).

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