Multi-level medium filtering assembly and domestic sewage treatment device

Abstract

The utility model discloses a multi-level medium filtering assembly and a domestic sewage treatment device, and belongs to the technical field of sewage treatment.The multi-level medium filtering assembly comprises a plurality of partition plates distributed in an up-down staggered mode, a plurality of fixing screw rods and a plurality of limiting nuts, and each partition plate is composed of a supporting flat plate and a supporting inclined plate and forms a hexagonal cavity in an enclosing mode; fixing screws penetrate through guide holes of the partition plates, spacing of the partition plates can be adjusted by matching with limiting nuts, fixing is achieved, a first filtering mechanism, a multi-layer medium filtering assembly and a second filtering mechanism are sequentially arranged in the sewage treatment box in the sewage flowing direction, and the first filtering mechanism intercepts impurities through a transverse grating, a longitudinal grating and a hook; the second filtering mechanism realizes fine filtering through a drawable insertion plate and a filter screen, a chute at the bottom of the sewage treatment box is matched with a blow-off pipe to realize sludge discharge, the device can realize step-by-step efficient filtering of sewage, the distance between the filtering layers is adjustable, each filtering mechanism is convenient to disassemble and assemble, and the device can meet the filtering requirements of different water qualities.

Description

Technical Field

[0001] This utility model relates to the field of domestic sewage treatment technology, and in particular to a multi-level media filtration component and a domestic sewage treatment device. Background Technology

[0002] In the process of domestic sewage treatment, filtration is a key step in removing suspended impurities and improving effluent quality. Existing domestic sewage treatment plant filtration systems have shortcomings: Regarding multi-stage filtration structures, traditional multi-stage filtration devices often have fixed filter layer spacing, making it impossible to flexibly adjust the spacing according to differences in sewage quality and filtration requirements, thus limiting the applicability of the device; furthermore, the installation and disassembly of filter layers often use an integrated, fixed structure, requiring the entire filtration structure to be disassembled when the media or packing material within the filter layer needs to be replaced or cleaned, which is cumbersome, time-consuming, and labor-intensive.

[0003] In the pretreatment filtration stage, the primary filtration structure of conventional filtration devices often adopts a single grid design, which can only intercept larger-diameter impurities and is not effective at intercepting soft fibrous impurities. These impurities are easily carried into subsequent filtration units by the water flow, causing blockage of subsequent filter media and affecting the stable operation of the filtration system. In addition, the primary filtration structure is mostly fixed, making subsequent cleaning and maintenance inconvenient. After long-term use, the accumulation of impurities can easily lead to blockage of the water flow channel and reduce the filtration flux. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing multi-layer filtration devices, where the filter layer spacing is mostly fixed and cannot be flexibly adjusted according to the differences in water quality and filtration requirements of the treated wastewater, resulting in poor interception of soft fibrous impurities. Therefore, this invention proposes a multi-layer media filtration component and a domestic wastewater treatment device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multi-stage media filtration assembly, comprising:

[0007] Multiple partitions are arranged in an alternating pattern. Each partition includes multiple support plates and a support inclined plate. The multiple support plates are fixedly connected to the support inclined plate. Two adjacent partitions are arranged to form a hexagonal cavity. A gap is left between two adjacent partitions for filling the filter medium and allowing sewage to flow. Multiple guide holes are provided on each support plate.

[0008] Multiple fixing screws are arranged vertically, and the fixing screws pass through the guide holes of all partitions, so that the multiple partitions can slide along the axial direction of the fixing screws;

[0009] Multiple limiting nuts are provided, with at least one limiting nut corresponding to the top and bottom of each partition. The limiting nuts are threaded onto the outer wall of the fixing screw and are used to axially limit and fix the partition.

[0010] A domestic sewage treatment device includes: a sewage treatment tank, and a multi-stage media filter assembly as described above;

[0011] The two opposite side walls of the sewage treatment tank are respectively fixedly installed with connecting flanges, and the ends of the two connecting flanges away from the sewage treatment tank are respectively fixedly connected to an inlet pipe and a drain pipe.

[0012] The wastewater treatment tank is provided with a first filtration mechanism, a multi-level media filtration assembly, and a second filtration mechanism arranged sequentially along the wastewater flow direction. The bottom end of the fixing screw of the multi-level media filtration assembly is fixedly connected to the bottom inner wall of the wastewater treatment tank.

[0013] In one possible design, the first filtering mechanism includes a rectangular frame and an interception component;

[0014] The inner walls on both sides of the sewage treatment tank are provided with strip grooves that fit the rectangular frame. The rectangular frame is slidably engaged between two corresponding strip grooves and can be pulled out and disassembled along the length of the strip groove.

[0015] The interception component is fixedly installed inside the rectangular frame. The interception component includes a horizontal grille and multiple vertical grilles. The horizontal grille is arranged in a horizontal direction. The multiple vertical grilles are fixedly installed at the top and bottom of the horizontal grille, and the vertical grilles are perpendicularly intersecting the horizontal grille.

[0016] Each of the longitudinal grids has multiple hooks fixedly installed on its outer side to intercept soft fibrous impurities.

[0017] In one possible design, the second filtration mechanism includes an insert plate and a filter screen;

[0018] The top inner wall of the sewage treatment tank is provided with a slot that fits the insert plate, and the insert plate is slidably connected inside the slot;

[0019] A rectangular hole communicating with a slot is provided on one side wall of the sewage treatment tank, and the rectangular hole is used for the insertion plate to be pulled out.

[0020] The filter screen is fixedly installed on the side of the insert plate facing the multi-level media filtration assembly;

[0021] The wastewater treatment tank has a circular hole on one side wall that communicates with the slot. The circular hole is fixedly connected to the drain pipe to discharge the wastewater after it has been filtered by the filter screen.

[0022] In one possible design, the bottom inner wall of the sewage treatment tank is provided with an inclined groove, which is inclined towards the discharge side along the sewage flow direction;

[0023] A drain pipe is fixedly installed on the top of the sewage treatment tank, and the bottom end of the drain pipe is connected to the inclined channel for discharging settled sludge.

[0024] In one possible design, the outer wall of the wastewater treatment tank is integrally formed with multiple reinforcing plates, which are evenly distributed along the circumference of the wastewater treatment tank.

[0025] In one possible design, the top of the sewage treatment tank has two symmetrically arranged rectangular slots, and each of the two rectangular slots has a mounting plate that is snapped into it. The mounting plate has multiple mounting holes, and the mounting plate is fixed in the rectangular slot by fasteners passing through the mounting holes.

[0026] A triangular inclined plate is fixedly connected between the two mounting plates. The triangular inclined plate is located on the water inlet side of the uppermost partition in the multi-level media filter assembly and is used to guide the sewage.

[0027] In one possible design, the insert plate has an operating hole inside.

[0028] In this application, when in use, sewage is sent into the sewage treatment tank through the inlet pipe. After the sewage enters, it first passes through two sets of rectangular frames for preliminary filtration. The horizontal and vertical grids can prevent large impurities from entering, and the multiple hooks can improve the filtration effect of impurities. The rectangular frames are inserted into the strip groove as a whole for easy cleaning later.

[0029] Wastewater continues to be conveyed forward, passing through the gaps between multiple baffles and the space composed of multiple supporting plates and inclined plates, which can accommodate various media and fillers. Then, the wastewater enters between the multiple baffles, where it can be filtered simultaneously, improving filtration efficiency. Multiple baffles are slidably sleeved on four fixed screws, and multiple limit nuts are threaded on the fixed screws and located on the upper and lower sides of the baffles, which can facilitate the disassembly of multiple baffles and adjust the spacing between each baffle layer as needed, thus expanding the applicability of the device.

[0030] After being filtered on both sides, the wastewater is finally discharged through the drain pipe. After a period of use, the insert plate can be pulled up through the operating hole and removed from the inside of the slot, making it convenient to clean and maintain the filter screen. The bottom inner wall of the wastewater treatment tank is equipped with a sloping groove to facilitate the discharge of sludge, which is then discharged through the sewage pipe.

[0031] Beneficial effects: The multi-stage media filter assembly forms a hexagonal space through multiple staggered partitions, which can accommodate various media and fillers. When sewage flows through, it can simultaneously perform multi-stage filtration, effectively improving filtration efficiency. The partitions are slidably fitted onto the fixing screws through guide holes and are fixed by limiting nuts on the upper and lower sides. This not only facilitates the disassembly and installation of the partitions, but also allows for flexible adjustment of the spacing between each partition according to the sewage quality and filtration requirements, thus broadening the applicability of the device.

[0032] The first filtration unit adopts a rectangular frame that slides and snaps into the strip groove, making it easy to remove and clean as a whole. The horizontal and vertical grilles work together to effectively intercept large impurities, and the multiple hooks on the side of the vertical grille can enhance the interception effect of soft fibrous impurities, reduce the risk of clogging of subsequent filtration units, and ensure the stable operation of the filtration system.

[0033] The insert plate of the second filtration mechanism is slidably connected in the slot. The insert plate can be easily pulled up through the rectangular hole, which facilitates the cleaning and maintenance of the filter screen, shortens downtime for maintenance, and improves processing efficiency. The slot, in conjunction with the round hole and drain pipe, ensures that the filtered wastewater is discharged smoothly and that the water flow channel is unobstructed.

[0034] The inclined groove design on the inner wall of the bottom of the sewage treatment tank can guide sludge and other sediments to collect towards the sewage pipe, making it easier for the sludge to be completely discharged and preventing sediment from accumulating at the bottom, affecting the filtration effect and aggravating equipment corrosion. The multiple reinforcing plates on the outer wall of the sewage treatment tank can enhance the overall structural strength of the device, improve the stability of the device under long-term water flow impact and pressure, and extend the service life of the equipment.

[0035] The connecting flanges on both sides of the sewage treatment tank facilitate the installation and disassembly of the inlet and outlet pipes, improving the ease of assembly and maintenance of the device; the mounting plate snapped into the rectangular groove at the top, together with the triangular inclined plate, guides the sewage entering the multi-stage media filtration assembly, ensuring that the sewage is evenly distributed into the filtration space between each partition, further improving the uniformity of the filtration effect. Attached Figure Description

[0036] Figure 1 This is a three-dimensional structural diagram of a multi-level media filtration assembly and a domestic sewage treatment device proposed in this utility model.

[0037] Figure 2 This is a three-dimensional sectional view of a multi-level media filtration assembly and a sewage treatment tank in a domestic sewage treatment device proposed in this utility model.

[0038] Figure 3 Exploded view of the sewage treatment tank and insert plate in a multi-level media filter assembly and domestic sewage treatment device proposed in this utility model;

[0039] Figure 4 This is a three-dimensional view of the rectangular frame in a multi-level media filtration assembly and domestic sewage treatment device proposed in this utility model.

[0040] Figure 5 This is an exploded view of the partition and triangular inclined plate in a multi-level media filtration assembly and domestic sewage treatment device proposed in this utility model.

[0041] In the diagram: 1. Wastewater treatment tank; 2. Inlet pipe; 3. Rectangular frame; 4. Triangular inclined plate; 5. Partition plate; 501. Supporting inclined plate; 502. Supporting plate; 503. Guide hole; 6. Fixing screw; 7. Insert plate; 8. Reinforcing plate; 9. Connecting flange; 10. Filter screen; 11. Rectangular hole; 12. Rectangular groove; 13. Strip groove; 14. Round hole; 15. Sewage pipe; 16. Inclined groove; 17. Operating hole; 18. Drain pipe; 19. Slot; 20. Longitudinal bar; 21. Transverse bar; 22. Hook; 23. Limit nut; 24. Mounting hole; 25. Mounting plate. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0043] In one embodiment: Refer to Figure 1-5 A treatment device includes a wastewater treatment tank 1. A multi-stage media filtration assembly includes multiple partitions 5 and multiple fixing screws 6. The multiple partitions 5 are arranged in an alternating pattern. Specifically, each partition 5 is composed of multiple supporting plates 502 and the same supporting inclined plate 501. The multiple supporting plates 502 are fixedly connected to the supporting inclined plate 501. The upper and lower partitions 5 cooperate to form a hexagonal structure, and there is a gap between the two partitions 5 to provide space for the filling of filter media and packing. At the same time, multiple guide holes 503 are opened inside the supporting plates 502.

[0044] The bottoms of multiple fixing screws 6 are fixedly connected to the inner wall of the bottom of the sewage treatment tank 1. The fixing screws 6 pass through multiple guide holes 503, allowing the multiple partitions 5 to be adjusted in position along the length of the fixing screws 6. Specifically, multiple limiting nuts 23 are threaded onto the outer wall of the fixing screws 6. The multiple limiting nuts 23 are located above and below the partitions 5, respectively. By tightening the limiting nuts 23, the partitions 5 can be limited and fixed. A sealing washer is provided on the contact surface between the limiting nut 23 and the partition 5, and a sealing ring is provided at the fit gap between the fixing screws 6 and the guide holes 503. Based on this, multiple The partition 5 is slidably connected to the inner wall of the sewage treatment tank 1 via a slider and a slide rail. Multiple partitions 5 are sleeved on the fixing screw 6 and, together with the limiting nuts 23 on the upper and lower sides, not only can the multiple partitions 5 be easily disassembled, but the spacing between each layer of partitions 5 can also be adjusted according to the differences in sewage quality and filtration requirements, thereby expanding the applicability of the device. When the sewage continues to be transported forward, it will pass through the gaps between multiple partitions 5. The space composed of multiple supporting plates 502 and supporting inclined plates 501 can accommodate a variety of media and fillers. After the sewage enters between the multiple layers of partitions 5, it can be filtered simultaneously, thereby improving the filtration efficiency.

[0045] The domestic sewage treatment device includes the aforementioned multi-stage media filter assembly and a sewage treatment tank 1. Connecting flanges 9 are fixedly installed on both sides of the sewage treatment tank 1. Specifically, one end of each connecting flange 9 is fixedly connected to an inlet pipe 2 and a drain pipe 18, respectively. Sewage can be sent into the sewage treatment tank 1 through the inlet pipe 2, and the treated water is discharged through the drain pipe 18. Strip grooves 13 are formed on both inner walls of the sewage treatment tank 1. A first filtration mechanism for filtration is arranged between corresponding two strip grooves 13. Furthermore, a slot 19 is formed on the inner wall of the top of the sewage treatment tank 1. A second filtration mechanism for filtration is arranged inside the slot 19. The multi-stage media filter assembly is fixedly installed inside the sewage treatment tank 1 and located between the first and second filtration mechanisms, allowing sewage to pass through the first filtration mechanism, the multi-stage media filter assembly, and the second filtration mechanism in sequence, thereby improving the effluent water quality.

[0046] The first filtration mechanism includes a rectangular frame 3, which is slidably engaged inside the strip groove 13, allowing the rectangular frame 3 to be pulled out along the strip groove 13 for easy cleaning and maintenance. A horizontal grid 21 is fixedly installed inside the rectangular frame 3, and a vertical grid 20 is fixedly installed at the top and bottom of the horizontal grid 21. The horizontal grid 21 and the vertical grid 20 work together to form a mesh structure, which can intercept large impurities in the sewage. Multiple hooks 22 are fixedly installed on the side of the vertical grid 20. The hooks 22 can intercept soft fibrous impurities in the sewage, preventing these impurities from entering the subsequent filtration unit with the water flow and causing filter media blockage. After the sewage is sent into the sewage treatment tank 1 from the inlet pipe 2, it first passes through the two sets of rectangular frames 3 for preliminary filtration. The horizontal grid 21 and the vertical grid 20 can prevent large impurities from entering, and the multiple hooks 22 further improve the filtration effect on impurities. The rectangular frame 3 is inserted into the strip groove 13 as a whole, and during subsequent cleaning, the rectangular frame 3 can be directly pulled out from the strip groove 13, which is convenient to operate.

[0047] The second filtration mechanism includes an insert plate 7 slidably connected inside the slot 19. A filter screen 10 is installed on the insert plate 7. A rectangular hole 11 is opened on one side of the inner wall of the sewage treatment tank 1. The rectangular hole 11 is connected to the slot 19 and provides operating space for pulling out the insert plate 7. An operating hole 17 is opened on the insert plate 7. A circular hole 14 is opened on one side of the inner wall of the slot 19. The circular hole 14 is used in conjunction with and connected to the drain pipe 18. The sewage after the first two stages of filtration will be filtered again by the filter screen 10 and finally discharged through the circular hole 14 into the drain pipe 18. After a period of use, the insert plate 7 can be pulled out upward through the rectangular hole 11. After the insert plate 7 is pulled out from inside the slot 19, the filter screen 10 can be cleaned and maintained. The operation is simple and convenient.

[0048] Furthermore, the top of the sewage treatment tank 1 is provided with two symmetrically arranged rectangular slots 12. The two rectangular slots 12 are fitted with mounting plates 25. The mounting plates 25 are provided with multiple mounting holes 24. The mounting plates 25 can be firmly fixed in the rectangular slots 12 through the mounting holes 24. The two mounting plates 25 are fixedly connected with the same triangular inclined plate 4. The triangular inclined plate 4 is located on one side of the uppermost partition plate 5. The sewage that has been initially filtered by the first filtration mechanism will flow smoothly into the partition plates 5 of the multi-level media filtration assembly under the guidance of the triangular inclined plate 4, avoiding the sewage directly impacting the filter media and causing uneven distribution of the filter media, thus ensuring the stability of the filtration effect.

[0049] Based on this, the number of baffles 5 and the spacing between adjacent baffles 5 can be adjusted according to the actual sewage treatment volume. Adjustment is completed by loosening the limiting nut 23, moving the baffle 5 to the appropriate position, and then tightening the limiting nut 23. This operation is flexible and convenient, adaptable to different treatment needs. Unlike the above embodiment, a handle can be provided on the top of the insert plate 7, making the pulling operation of the insert plate 7 easier and further improving the convenience of operation and maintenance.

[0050] This application can be used in the field of domestic sewage treatment, or in other fields applicable to this application.

[0051] In another embodiment: Reference Figure 1-5 This invention relates to a multi-level media filtration assembly and a domestic sewage treatment device, which is used in the field of domestic sewage treatment. The structure of this embodiment is basically the same as that of the aforementioned embodiments, except that: a sloping groove 16 is provided on the bottom inner wall of the sewage treatment tank 1, and a sewage pipe 15 is fixedly installed on the top of the sewage treatment tank 1. The sewage pipe 15 is connected to the sloping groove 16. The inclined structure of the sloping groove 16 allows the sludge generated during the sewage treatment process to converge along the inclined direction of the sloping groove 16 to the sewage pipe 15, facilitating sludge discharge. Finally, the sludge is discharged through the sewage pipe 15. The outer wall of the sewage treatment tank 1 is integrally formed with multiple reinforcing plates 8, which can improve the structural strength of the sewage treatment tank 1 and prevent it from deforming due to water pressure during long-term use. A sewage valve is installed in series on the sewage pipe 15 to control the opening and closing of the sewage pipe 15 and realize the periodic centralized discharge of settled sludge.

[0052] During long-term use, the rectangular frame 3 needs to be periodically removed from the strip groove 13 to clean the impurities trapped on the transverse grid 21, longitudinal grid 20, and hook 22; the insert plate 7 needs to be periodically removed through the operation hole 17 to clean or replace the filter screen 10; the fit between the fixing screw 6 and the limit nut 23 needs to be periodically checked, and lubricant should be applied to the mating parts of the fixing screw 6 and the guide hole 503, and the sliding parts of the insert plate 7 and the slot 19, and impurities in the mating gaps should be cleaned; at the same time, the filtration effect of the filter medium needs to be periodically checked, and ineffective filter medium should be replaced in time to ensure the stable operation of the device.

[0053] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A multi-stage media filtration assembly, characterized in that, include: Multiple partitions (5) are arranged in an alternating pattern. Each of the partitions (5) includes multiple support plates (502) and a support inclined plate (501). The multiple support plates (502) are fixedly connected to the support inclined plate (501). Two adjacent partitions (5) are enclosed to form a hexagonal cavity, and a gap is left between two adjacent partitions (5) for filling the filter medium and for sewage to flow. Each support plate (502) is provided with multiple guide holes (503). Multiple fixing screws (6) are arranged in a vertical direction; The fixing screw (6) passes through the guide hole (503) of all the partitions (5), so that the multiple partitions (5) can slide along the axial direction of the fixing screw (6); Multiple limiting nuts (23) are provided above and below each partition (5). The limiting nuts (23) are threaded onto the outer wall of the fixing screw (6) and are used to axially limit and fix the partition (5).

2. A domestic sewage treatment device, characterized in that, include: Wastewater treatment tank (1), and the multi-stage media filtration assembly as described in claim 1; The sewage treatment tank (1) is provided with a first filtration mechanism, a multi-level media filtration assembly and a second filtration mechanism in sequence along the sewage flow direction. The bottom end of the fixing screw (6) of the multi-level media filtration assembly is fixedly connected to the bottom inner wall of the sewage treatment tank (1).

3. The domestic sewage treatment device according to claim 2, characterized in that, The first filtering mechanism includes a rectangular frame (3) and an interception component; The inner walls of both sides of the sewage treatment tank (1) are provided with strip grooves (13) that are adapted to the rectangular frame (3). The rectangular frame (3) is slidably engaged between the two corresponding strip grooves (13) and can be pulled out and disassembled along the length of the strip grooves (13). The interception component is fixedly installed inside the rectangular frame (3). The interception component includes a horizontal grille (21) and a plurality of vertical grilles (20). The horizontal grille (21) is arranged in the horizontal direction. The plurality of vertical grilles (20) are fixedly installed at the top and bottom of the horizontal grille (21) respectively, and the vertical grilles (20) and the horizontal grille (21) are perpendicularly intersecting. Each of the longitudinal grids (20) has multiple hooks (22) fixedly installed on its outer side for intercepting soft fibrous impurities.

4. The domestic sewage treatment device according to claim 2, characterized in that, The second filtration mechanism includes an insert plate (7) and a filter screen (10); The top inner wall of the sewage treatment tank (1) is provided with a slot (19) that is compatible with the insert plate (7), and the insert plate (7) is slidably connected to the inside of the slot (19). The sewage treatment tank (1) has a rectangular hole (11) on one side wall that communicates with the slot (19), and the rectangular hole (11) is used for the insertion plate (7) to be pulled out. The filter screen (10) is fixedly installed on the side of the insert plate (7) facing the multi-level media filtration assembly; The sewage treatment tank (1) has a circular hole (14) on one side wall that communicates with the slot (19). The circular hole (14) is fixedly connected to the drain pipe (18) for the sewage filtered by the filter screen (10) to be discharged.

5. The domestic sewage treatment device according to claim 2, characterized in that, The bottom inner wall of the sewage treatment tank (1) is provided with an inclined groove (16), which is inclined towards the sewage discharge side along the sewage flow direction. The top of the sewage treatment tank (1) is fixedly equipped with a sewage pipe (15), and the bottom end of the sewage pipe (15) is connected to the inclined trough (16) for discharging settled sludge.

6. The domestic sewage treatment device according to claim 2, characterized in that, The outer wall of the sewage treatment tank (1) is integrally formed with multiple reinforcing plates (8), and the multiple reinforcing plates (8) are evenly distributed along the circumference of the sewage treatment tank (1).

7. The domestic sewage treatment device according to claim 2, characterized in that, The top of the sewage treatment tank (1) has two symmetrically arranged rectangular slots (12), and each of the two rectangular slots (12) is fitted with an installation plate (25). The installation plate (25) has multiple installation holes (24), and the installation plate (25) is fixed in the rectangular slot (12) by fasteners passing through the installation holes (24). A triangular inclined plate (4) is fixedly connected between the two mounting plates (25). The triangular inclined plate (4) is located on the water inlet side of the uppermost partition (5) of the multi-level media filter assembly and is used to guide the sewage.

8. The domestic sewage treatment device according to claim 4, characterized in that, The insert plate (7) has an operating hole (17) inside.

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