Scum collecting device of sewage sedimentation tank and sewage tank

Abstract

The utility model discloses a scum collecting device of a sewage sedimentation tank and a sewage tank adopting the scum collecting device, and aims to solve the problems that the scum collecting efficiency is low, scum is easy to disturb and fine classification is difficult to realize in the prior art. The device comprises a supporting frame, a lifting structure is arranged on the supporting frame, and the movable end of the lifting structure is connected with a scum collecting structure. The scum collecting structure comprises a scum collecting hopper, and at least one detachable baffle is arranged at the two ends of the scum collecting hopper. The device is characterized in that a plurality of residue filtering plates which are arranged at intervals in the lifting direction are connected into the scum collecting hopper in a sliding mode, residue filtering holes are formed in the residue filtering plates, the diameters of the residue filtering holes of the adjacent residue filtering plates are unequal, and preferably, the diameter of the upper residue filtering plate is larger than that of the lower residue filtering plate. The scum collecting hopper is preferably funnel-shaped and initially located at the bottom of the funnel-shaped sedimentation tank, scum enters the hopper due to gravity, and fine classification of waste residues with different particle sizes is achieved through multiple stages of residue filtering plates. After the scum is fully collected, the collecting hopper is lifted through the lifting structure, and the classified scum can be respectively taken out by opening the baffle plate. The device does not need to move repeatedly in water, scum confusion is avoided, source fine classification treatment of waste residues is achieved, and the device is simple in structure and convenient to operate.

Description

Technical Field

[0001] This utility model relates to the technical field of environmental protection engineering, specifically to a scum collection device for sewage sedimentation tanks and a sewage tank. Background Technology

[0002] With the rapid development of industry and urbanization, the amount of wastewater generated is increasing daily, putting enormous pressure on the water environment. Wastewater treatment is a crucial aspect of environmental protection, and the effective collection and treatment of floating solids such as scum and suspended matter in wastewater is of paramount importance. If this scum is not removed in a timely manner, it will not only affect the normal operation and treatment efficiency of the wastewater treatment system, but may also cause secondary pollution to the environment.

[0003] Currently, various technical solutions have emerged for collecting scum from wastewater treatment ponds. For example, a Chinese utility model patent discloses a scum collection device for wastewater treatment ponds. This device includes a driving component mounted on the upper surface of the wastewater pond and a collecting component mounted on its bottom surface. The driving component moves the collecting component in the wastewater pond to collect scum, and a cleaning unit is provided to clean the collection tank. However, in such devices, the collecting component needs to move in the water during collection, which may cause the scum to be disturbed and spread, affecting collection efficiency. At the same time, the cleaning method of the collection tank may result in incomplete cleaning or inconvenient operation.

[0004] Another type of scum removal device, such as the technology disclosed in the Chinese invention patent, uses a track that runs across the upper part of the sedimentation tank. A scraper driver moving along the track drives scrapers to scrape scum from the water surface and pushes the scum to a scum collection device on one side for collection and discharge. This method is mainly for scraping scum from the water surface, and its scum collection device is usually located on one side of the sedimentation tank, relying on scrapers to push the scum in.

[0005] Some wastewater separation devices, such as those shown in Chinese utility model patents, include a treatment cabinet, a filter assembly, a waste residue removal assembly, and a lifting assembly. The filter assembly comprises a filter plate and a collection box, through which wastewater undergoes solid-liquid separation. The device uses a lifting assembly to vertically move the filter plate and collection box, and is equipped with a scraper brush to scrape the inner wall of the treatment cabinet.

[0006] Analysis of the existing technologies mentioned above reveals that they have solved the problem of scum collection to some extent, but there are still some areas for improvement:

[0007] 1. Collection method and efficiency: Some mobile collection devices are prone to disturbing the scum when operating in water, which affects the collection efficiency and may cause sinking or movement difficulties due to the accumulation of scum.

[0008] 2. Scum Classification and Treatment: Most existing technologies primarily focus on the collection and removal of scum, often treating the collected scum as a mixture. They lack the capability to effectively grade and finely classify scum of different particle sizes or properties during the collection stage. This necessitates additional sorting processes for subsequent differentiated treatment or resource utilization of the waste scum, increasing the complexity and cost of the process.

[0009] 3. Structure and maintenance: Some devices have complex structures and many moving parts, which may lead to higher maintenance costs or make them susceptible to damage in harsh wastewater environments.

[0010] Therefore, developing a wastewater sedimentation tank scum collection device with a more optimized structure that can achieve efficient and low-disturbance collection, while also performing fine classification of scum during the collection process, is of great significance for improving wastewater treatment efficiency and promoting resource recycling, and is a direction that those skilled in the art will continue to explore. Utility Model Content

[0011] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a scum collection device for sewage sedimentation tanks and a sewage tank containing the device, aiming to solve the problems of low scum collection efficiency, difficulty in achieving fine scum classification and complex structure in the existing technology.

[0012] To achieve the above objectives, the present invention adopts the following technical solution: The present invention discloses a scum collection device for a sewage sedimentation tank, including a support frame, a lifting structure on the support frame, and a scum collection structure connected to the movable end of the lifting structure; the scum collection structure includes a scum collection hopper, baffles at both ends of the scum collection hopper, at least one baffle being detachably connected to the scum collection hopper, and multiple filter plates slidably connected inside the scum collection hopper, the multiple filter plates being arranged at intervals along the vertical direction, each filter plate being provided with filter holes, and the diameters of the filter holes on adjacent filter plates being different.

[0013] Through the above technical solution, after entering the scum collection hopper, the scum will pass through multiple filter plates with different pore sizes in sequence, thereby achieving step-by-step filtration and stratified collection of scum of different particle sizes, achieving the purpose of fine classification and processing. The detachable baffle design facilitates the subsequent removal of the classified scum from the collection hopper.

[0014] Preferably, in two adjacent filter plates, the pore size of the filter holes in the upper filter plate is larger than that in the lower filter plate. This arrangement ensures that larger particles of scum are first intercepted by the upper filter plate, while smaller particles of scum pass through the upper filter plate and are then intercepted by the lower filter plate with smaller pore sizes, achieving orderly screening from coarse to fine.

[0015] Preferably, the inner wall of the scum collection hopper is provided with limiting strips extending perpendicular to the baffle, and each filter plate is supported and fixed inside the scum collection hopper by two limiting strips. The limiting strips provide stable support for the filter plates and facilitate the sliding installation and disassembly cleaning of the filter plates.

[0016] Preferably, a locking connector is provided between the baffle and the scum collection hopper. The locking connector ensures a secure connection between the baffle and the scum collection hopper, preventing accidental leakage of scum during collection or lifting.

[0017] Preferably, the locking connector includes a snap fastener disposed on the baffle and a locking fastener disposed on the scum collection hopper. This snap fastener and locking fastener combination is simple to operate and can quickly open and close the baffle.

[0018] Preferably, the lifting structure includes an air pump extending vertically and a telescopic protective chamber located outside the air pump. The air pump provides the lifting power, and the telescopic protective chamber effectively protects the air pump, preventing sewage or impurities from entering and extending its service life.

[0019] Preferably, the scum collection hopper is equipped with a connecting block for connecting the air pump. The connecting block ensures that the power of the air pump can be stably transmitted to the scum collection hopper, enabling its smooth lifting and lowering.

[0020] This utility model also provides a sewage tank, wherein a scum collection device as described in any of the preceding claims is provided. Applying the above-mentioned scum collection device to a sewage tank can effectively improve the collection and classification treatment of scum in the sewage tank.

[0021] Preferably, the shape of the scum collection hopper corresponds to the shape of the sewage tank. This design allows the scum collection hopper to better adapt to the bottom contour of the sewage tank, improving scum collection efficiency and reducing collection dead zones.

[0022] Preferably, the scum collection hopper is funnel-shaped. The funnel shape facilitates the scum to gather towards the center of the hopper under gravity and pass smoothly through the filter plate, while also facilitating the subsequent discharge of scum.

[0023] The beneficial effects of this utility model are as follows: Through the organic combination of the above-mentioned technical features, this utility model not only achieves efficient and low-disturbance collection of scum in sewage sedimentation tanks, but more importantly, it innovatively completes the fine classification of scum during the collection stage, while ensuring the stability and reliability of the structure and the convenience of operation and maintenance. It has significant practical value and promotion prospects.

[0024] Firstly, this utility model provides a scum collection device for sewage sedimentation tanks, comprising a support frame, a lifting structure mounted on the support frame, and a scum collection structure connected to the movable end of the lifting structure. The core feature is that the scum collection structure includes a scum collection hopper with baffles at both ends, at least one of which is detachably connected. Crucially, multiple filter plates are slidably connected within the scum collection hopper, spaced apart along the direction of movement of the lifting structure. Each filter plate has filter holes, and the hole diameters of adjacent filter plates are unequal. The synergistic effect of this series of structures brings about the core technical effect: when scum enters the scum collection hopper under gravity or through other means, it passes sequentially through these filter plates with different hole diameters. Therefore, larger scum particles are initially intercepted by the upper filter plates with larger hole diameters, while smaller scum particles can pass through and be further intercepted by subsequent filter plates with smaller hole diameters. Therefore, this device can achieve step-by-step filtration and layered storage of waste residue of different sizes at the initial stage of scum collection, thereby achieving the goal of refined classification and treatment of waste residue and laying a good foundation for subsequent targeted disposal or resource utilization. At the same time, the detachable design of at least one baffle allows for easy removal of the classified layers of scum from the scum collection hopper after collection, thus improving the convenience of operation.

[0025] Furthermore, in a preferred embodiment of this invention, in two adjacent filter plates, the pore size of the filter plate above is larger than that of the filter plate below. This specific pore size gradient arrangement ensures that the scum is orderly screened from coarse to fine when passing through the filter plate system. That is, the coarsest particles are separated first, followed by the next largest, and so on. This not only ensures the accuracy of classification but also prevents the finer-pore filter plates from being prematurely clogged, thereby maintaining the unobstructed flow and continuous operation of the entire filtration system.

[0026] Furthermore, another preferred embodiment of this utility model indicates that the inner wall of the scum collection hopper is provided with limiting strips extending perpendicular to the baffle direction, and each filter plate is supported and fixed by two limiting strips. This design of limiting strips provides stable and reliable support for the slidingly connected filter plates, ensuring that the filter plates can maintain a preset interval and position in the collection hopper, and facilitating the installation, disassembly, and cleaning and maintenance of the filter plates, thereby reducing the difficulty and time cost of equipment maintenance.

[0027] Furthermore, this utility model also discloses a scheme for connecting the baffle and the scum collection hopper via a locking connector, wherein the locking connector may include a snap fastener disposed on the baffle and a latch disposed on the scum collection hopper. This locking connection method ensures, on the one hand, a tight fixation between the baffle and the scum collection hopper in the closed state, effectively preventing accidental leakage of scum due to vibration or water flow impact during scum collection or lifting; on the other hand, its operation is simple and quick, allowing the baffle to be opened rapidly when scum needs to be removed, thereby improving work efficiency.

[0028] Meanwhile, the lifting structure of this utility model may include an air pump extending vertically and a telescopic protective chamber disposed outside the air pump, and a connecting block for connecting the air pump may be provided on the scum collection hopper. These features together ensure that the scum collection hopper can achieve smooth and reliable vertical lifting and lowering through the power provided by the air pump. The telescopic protective chamber protects the internal air pump from external environmental corrosion such as sewage and scum, thereby extending the service life and operational stability of the lifting mechanism; the connecting block ensures that the lifting power can be effectively transmitted to the scum collection hopper.

[0029] Finally, this utility model also relates to a sewage tank equipped with the aforementioned sewage sedimentation tank scum collection device. Furthermore, when the shape of the scum collection hopper in this device corresponds to the shape of the sewage tank, especially when the scum collection hopper is funnel-shaped, the resulting technical effect is that when the shape of the scum collection hopper matches the sewage tank (especially its bottom), it can more effectively collect and guide the settled scum into the collection hopper, reducing collection dead zones and thus improving the overall scum capture rate. In particular, the funnel-shaped scum collection hopper utilizes the principle of gravity, which facilitates the natural sliding of scum towards the center of the collection hopper and through the multi-stage filter plates, while also facilitating the subsequent complete discharge of the sorted scum by opening the baffles. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments disclosed in this invention, the accompanying drawings of the embodiments will be briefly described below. These drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention.

[0031] Figure 1 This is a schematic diagram of the overall structure of a scum collection device for a sewage sedimentation tank according to the present invention;

[0032] Figure 2 This is a partial structural diagram showing the connection between the lifting structure and the scum collection structure in this utility model;

[0033] Figure 3 This is a schematic diagram of the scum collection hopper in the present invention with the baffle open.

[0034] Figure 4This is a partially enlarged schematic diagram of the filter plate installation inside the scum collection hopper in this utility model;

[0035] Figure 5 This is a cross-sectional view of the filter plate and limiting strip inside the scum collection hopper of this utility model.

[0036] Figure 6 This is a schematic diagram of the structure of the baffle and the buckle in this utility model;

[0037] Figure 7 This is a schematic diagram of the structure of the buckle and lock in this utility model.

[0038] In the picture:

[0039] 1. Sewage sedimentation tank; 2. Support frame; 3. Fixing frame; 4. Telescopic protective chamber; 5. Air pump; 6. Scum collection hopper; 7. Connecting block; 8. First filter plate; 9. Second filter plate; 10. Limiting strip; 11. Lock; 12. Baffle; 13. Plug. Detailed Implementation

[0040] The technical solutions (including preferred technical solutions) of the present invention will be further described in detail below with reference to the accompanying drawings and by way of listing some optional embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0041] Example 1

[0042] Please see Figures 1 to 7 This utility model discloses a scum collection device for a sewage sedimentation tank. The device first includes a sewage sedimentation tank 1. To optimize the natural collection of scum, in this embodiment, the sewage sedimentation tank 1 is preferably designed in a funnel shape. A support frame 2 is fixedly installed on the outside of the sewage sedimentation tank 1, providing a stable installation foundation for the entire collection device.

[0043] At the top of the support frame 2, several lifting structures (e.g., two or more are schematically shown in the figure to ensure uniform force distribution) are fixedly installed. These lifting structures can drive the subsequent scum collection structure to make vertical displacement. In this preferred embodiment, the lifting structure includes a fixed frame 3, which is connected to the top of the support frame 2. A telescopic protective chamber 4 is provided at the bottom of the fixed frame 3, and the telescopic protective chamber 4 houses a synchronous frequency air pump 5 (or air pump) as a power source. The output end (i.e., the movable end) of the air pump 5 extends downward and is connected to the scum collection structure. By controlling the inflation and deflation of the air pump 5, the lifting and lowering of the scum collection structure can be precisely controlled. The telescopic protective chamber 4 provides good protection for the air pump 5, preventing it from being corroded by sewage or harsh environments.

[0044] The core component of the scum collection structure is a scum collection hopper (also referred to as scum collection hopper 6 in this specification and claims). In this embodiment, to match the shape of the sewage sedimentation tank 1, the scum collection hopper 6 is preferably funnel-shaped. Crucially, the scum collection hopper 6 is initially positioned at the bottom of the sewage sedimentation tank 1. The top of the scum collection hopper 6 is fixedly connected to the lifting structure (i.e., the output end of the air pump 5) via a connecting block 7, ensuring stable transmission of the lifting action.

[0045] One of the key innovations of this utility model lies in its unique method of collecting and classifying scum. Inside the scum collection hopper 6, multiple filter plates are arranged at intervals along its vertical direction (i.e., the lifting direction). In this embodiment, it is configured as two layers: a first filter plate 8 at the top and a second filter plate 9 at the bottom. Both layers of filter plates are plate-like structures filled with filter holes, and the pore sizes on adjacent filter plates (i.e., the first filter plate 8 and the second filter plate 9) are different. Specifically, the pore sizes on the first filter plate 8 are designed to be larger to intercept large particles of scum; while the pore sizes on the second filter plate 9 are relatively smaller to intercept smaller particles of scum that pass through the first filter plate 8. Through this layered arrangement of filter plates with different pore sizes, when the scum in the wastewater gradually settles under gravity and falls naturally into the scum collection hopper 6 located at the bottom of the pool, it will be filtered sequentially by the first filter plate 8 and the second filter plate 9. This process eliminates the need for the scum collection hopper to move repeatedly within the wastewater, effectively preventing problems such as difficulty in settling the equipment amidst accumulated scum, or further scum disturbance and diffusion caused by underwater movement. After these two stages of filtration, waste residues of different sizes are effectively separated and remain on or between their corresponding filter plates, thus achieving refined classification and treatment of the waste residues.

[0046] To facilitate the installation, fixing, and cleaning of the filter plates, the inner wall of the scum collection hopper 6 is provided with limiting strips 10 extending in a specific direction (e.g., perpendicular to the baffle 12). The first filter plate 8 and the second filter plate 9 are stably fixed inside the collection hopper by sliding engagement with these limiting strips 10 through their edges, and can be easily pulled out for cleaning or replacement when needed.

[0047] To facilitate the removal of collected and sorted scum, baffles 12 are provided at both ends of the scum collection hopper 6. In this embodiment, at least one baffle 12 (preferably two baffles) is detachably connected to the scum collection hopper 6. The specific connection method can employ locking fasteners; for example, a latch 11 is fixed at a specific location (such as a corner) on the inner surface of the scum collection hopper 6, while a buckle 13 is provided at the corresponding location on the baffle 12. By engaging and disengaging the buckle 13 with the latch 11, the baffle 12 can be quickly opened and closed (e.g., by engaging and disengaging with the latch 11). Figure 3 (The open state is shown).

[0048] In this embodiment, considering the corrosiveness of the wastewater environment and the weight requirements of the device, the scum collection hopper 6, the first filter plate 8, the second filter plate 9, and the baffle 12 are preferably made of corrosion-resistant and lightweight engineering plastic materials.

[0049] The workflow of this utility model is as follows:

[0050] Initial and Collection Stage: The scum collection hopper 6 is lowered to the bottom of the sewage sedimentation tank 1 via a lifting structure. The scum in the sewage settles naturally due to gravity and falls into the scum collection hopper 6.

[0051] Filtration and classification stage: The scum entering the hopper passes through the first filter plate 8 and the second filter plate 9 in sequence. Larger scum particles are intercepted by the first filter plate 8, and smaller scum particles are intercepted by the second filter plate 9, thus achieving layered classification.

[0052] Lifting stage: When a certain amount of scum is collected or the predetermined time is reached, the lifting structure (air pump 5) is activated to smoothly lift the fully loaded scum collection hopper 6 vertically to the outside of the sewage sedimentation tank 1 or the designated unloading position.

[0053] Unloading and cleaning stage: The operator opens the baffle 12 (by operating the latch 11 and the snap 13) and removes the scum of different particle sizes collected on the different filter plates. If necessary, the filter plates 8 and 9 can be pulled out from the limit strip 10 for thorough cleaning.

[0054] Reset phase: After cleaning, reinstall the filter plate and baffle, and the scum collection hopper 6 can be lowered back to the bottom of the pool to start a new collection cycle.

[0055] Example 2

[0056] The overall structure and working principle of this embodiment are basically the same as those of Embodiment 1. The differences may be as follows: for example, the lifting structure can adopt other equivalent driving methods, such as electric screws or hydraulic cylinders; the number of filter plates can be set to two or more layers according to actual classification needs to achieve more refined multi-level classification. The specific shapes of the sewage sedimentation tank and scum collection hopper can also be adapted to the application scenario, but funnel or cone shapes are still preferred to facilitate gravity settling and collection.

[0057] This utility model, through the above-mentioned structural design, cleverly utilizes gravity for static collection of scum, avoiding many drawbacks of traditional mobile collection devices. Furthermore, through its internal multi-stage filtration structure, it achieves refined classification of scum at the source, and has the advantages of simple structure, reliable operation, high collection efficiency, clear classification, and convenient operation and maintenance.

[0058] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0059] It will be readily understood by those skilled in the art that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, combinations, substitutions, improvements, etc., made under the spirit and principles of the present invention are included within the protection scope of the present invention.

Claims

1. A scum collection device for a sewage sedimentation tank, comprising a support frame, wherein a lifting structure is provided on the support frame, and a scum collection structure is connected to the movable end of the lifting structure, characterized in that: The scum collection structure includes a scum collection hopper, with baffles at both ends of the scum collection hopper. At least one baffle is detachably connected to the scum collection hopper. Multiple filter plates are slidably connected inside the scum collection hopper. The multiple filter plates are arranged at intervals along the vertical direction. Each filter plate is provided with filter holes, and the diameter of the filter holes on adjacent filter plates is different.

2. The scum collection device for sewage sedimentation tanks according to claim 1, characterized in that: In two adjacent filter plates, the filter plate above has a larger pore diameter than the filter plate below.

3. The scum collection device for sewage sedimentation tanks according to claim 2, characterized in that: The inner wall of the scum collection hopper is provided with limiting strips extending perpendicular to the direction of the baffle. Each filter plate is supported and fixed in the scum collection hopper by two limiting strips.

4. The scum collection device for sewage sedimentation tanks according to claim 1, characterized in that: A locking connector is provided between the baffle and the scum collection hopper.

5. The scum collection device for sewage sedimentation tanks according to claim 4, characterized in that: The locking connector includes a snap fastener disposed on the baffle and a locking buckle disposed on the scum collection hopper.

6. The scum collection device for sewage sedimentation tanks according to claim 1, characterized in that: The lifting structure includes an air pump extending vertically and a telescopic protective chamber located outside the air pump.

7. The scum collection device for sewage sedimentation tanks according to claim 6, characterized in that: The scum collection hopper is equipped with a connecting block for connecting the air pump.

8. A sewage tank, characterized in that: The sewage tank is equipped with a sewage sedimentation tank scum collection device as described in any one of claims 1-7.

9. The sewage tank according to claim 8, characterized in that: The shape of the scum collection hopper corresponds to the shape of the sewage tank.

10. The sewage tank according to claim 9, characterized in that: The scum collection hopper is funnel-shaped.

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