Sludge scraping structure of inclined plate sedimentation tank for wastewater treatment
By installing filter shells and filter components in the inclined plate sedimentation tank, the problems of effluent quality deterioration and equipment blockage caused by floating sludge particles are solved, achieving efficient sludge scraping and purification effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU KEDA ENVIRONMENTAL PROTECTION ENG CO LTD
- Filing Date
- 2025-08-26
- Publication Date
- 2026-07-31
AI Technical Summary
In existing inclined plate sedimentation tanks, sludge particles are prone to spreading and floating during the sludge scraping and discharge process, which leads to deterioration of effluent quality and equipment blockage. Furthermore, the system needs to be shut down to wait for the sludge to settle, increasing energy consumption and equipment wear.
A filter shell and filter assembly, including a filter screen and a flotation plate, are installed in the inclined plate sedimentation tank to intercept floating objects and facilitate easy cleaning through a sliding connection, thus preventing sludge from spreading.
Improve effluent quality, reduce turbidity, shorten sludge settling time, avoid downtime, and reduce energy consumption and equipment wear.
Smart Images
Figure CN224573280U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sludge scraping technology in sedimentation tanks, specifically to a sludge scraping structure for inclined plate sedimentation tanks used in wastewater treatment. Background Technology
[0002] Sedimentation tanks can be classified into horizontal flow, vertical flow, radial flow, and oblique flow sedimentation types according to the direction of water flow within the tank. Inclined plate sedimentation tanks belong to the oblique flow sedimentation type. Sedimentation tanks are structures that use sedimentation to remove suspended solids from water. Inclined plate sedimentation tanks, due to the addition of inclined plates in the tank, can greatly improve sedimentation efficiency, shorten sedimentation time, and reduce the volume of the sedimentation tank.
[0003] In existing inclined plate sedimentation tank structures, scraping devices are typically installed to remove sludge deposited on the inclined plate surface in order to maintain good settling effect. However, in actual operation, after the sludge scraping structure completes the scraping operation on the inclined plate surface, the sludge adhering to the plate is easily spread and floated under the action of water flow disturbance. These loose sludge particles or flocculent materials enter the clear water area at the top of the sedimentation tank with the water flow, and even spread to the clear water discharge pipe, causing problems such as deterioration of effluent water quality and filter screen clogging. To avoid such pollution risks, the conventional practice is to temporarily shut down the system and close the clear water discharge pipe, waiting for the resuspended sludge particles to settle naturally before resuming operation. Each cleaning requires additional time to wait for the sludge to settle again, which not only prolongs the entire treatment cycle, but may also lead to repeated start-ups and shutdowns of equipment such as water pumps, increasing energy consumption and equipment wear and tear.
[0004] Therefore, we propose a sludge scraping structure for inclined plate sedimentation tanks used in wastewater treatment. Utility Model Content
[0005] Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a sludge scraping and discharge structure for an inclined plate sedimentation tank for wastewater treatment, which can effectively solve the problems in the background technology.
[0006] Technical solution To achieve the above objectives, the technical solution adopted by this utility model is as follows: a sludge scraping structure for an inclined plate sedimentation tank for wastewater treatment, comprising multiple inclined plates fixedly connected to the inside of the sedimentation tank body, a wastewater inlet pipe and a clean water outlet pipe respectively penetrating through the side wall of the sedimentation tank body, at least one filter shell is provided at the upper end of the multiple inclined plates inside the sedimentation tank body, multiple flow holes are opened on the side wall of the filter shell, one end of the clean water outlet pipe extends into the filter shell, a filter assembly is slidably connected inside the filter shell at a position outside the clean water outlet pipe, and a buoyancy plate is fixedly connected to both ends of the filter assembly.
[0007] Furthermore, a connecting bracket is fixedly connected to the top of the filter shell, and the connecting bracket is fixedly connected to the top of the sedimentation tank. The inner wall of the filter shell is provided with a sliding groove one and a sliding groove two.
[0008] Furthermore, the filter assembly includes a sludge collection base plate, which has a receiving groove larger than the cross-sectional size of the clean water discharge pipe. Two filter screens are fixedly connected to the top of the sludge collection base plate, and a connecting plate is fixedly connected between the two filter screens. Connecting plates are fixedly connected to the opposite sides of the two filter screens, and filter screens are fixedly connected to the side walls of the two connecting plates. Connecting plates are fixedly connected to the adjacent ends of the filter screens.
[0009] Furthermore, the two buoyancy-cutting plates are respectively fixedly connected to the outer walls of the two filter screens, and the buoyancy-cutting plates are inclined from the top of the filter screens toward the top of the filter shell.
[0010] Furthermore, slider 1 is fixedly connected to the outer wall of the two connecting plates 2, and slider 1 can slide along the inner wall of the slide groove 1. Slider 2 is fixedly connected to the outer wall of the connecting plate 3, and slider 2 can slide along the inner wall of the slide groove 2.
[0011] Furthermore, the tops of slider one and slider two are respectively fixedly connected with pull blocks.
[0012] Furthermore, the pore size of filter screen one is smaller than that of filter screen two.
[0013] Beneficial effects Compared with the prior art, this utility model provides a sludge scraping structure for an inclined plate sedimentation tank for wastewater treatment, which has the following beneficial effects: This sludge scraping structure of an inclined plate sedimentation tank for wastewater treatment features at least one filter shell positioned above multiple inclined plate assemblies. Flow holes are provided on the sidewalls of the filter shell to guide the supernatant after sedimentation through the inclined plates into its interior. Filter components are slidably connected within the filter shell to sequentially intercept larger particles and fine suspended solids. This effectively improves effluent quality, reduces turbidity caused by fine particle residue, and accelerates sludge re-settling, avoiding downtime.
[0014] A buoy-cutting plate is fixedly connected to both ends of the filter assembly. The buoy-cutting plate is inclined from the top of the filter screen to the top of the filter shell. When the water level is high, the floating objects are effectively blocked by the buoy-cutting plate and cannot enter the interior of the filter assembly. At the same time, the floating objects are confined to the outer area of the filter shell, which is convenient for manual regular retrieval and cleaning. Attached Figure Description
[0015] Figure 1 A schematic diagram of the overall structure of the sludge scraping and discharge structure of the inclined plate sedimentation tank for wastewater treatment provided by this utility model; Figure 2 A cross-sectional view of the sludge scraping structure of the inclined plate sedimentation tank for wastewater treatment provided by this utility model. Figure 3 A schematic diagram showing the state of the filter housing and filter assembly provided by this utility model; Figure 4 A disassembled schematic diagram of the filter housing and filter assembly provided by this utility model; Figure 5 A schematic diagram of the structure of the filter assembly provided by this utility model.
[0016] The following are labeled in the diagram: 1. Sedimentation tank body; 2. Wastewater inlet pipe; 3. Clean water outlet pipe; 4. Inclined plate; 5. Filter shell; 6. Connecting bracket; 7. Flow hole; 8. Sludge collection bottom plate; 9. Filter screen one; 10. Connecting plate one; 11. Connecting plate two; 12. Sliding block one; 13. Filter screen two; 14. Connecting plate three; 15. Sliding block two; 16. Float cut-off plate; 17. Pull block. Detailed Implementation
[0017] To make the technical means, creative features, and achieved objectives and effects of this utility model readily understandable, the present utility model will be further described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0018] To address the shortcomings of existing technologies, such as Figure 1-5 As shown, this utility model provides a sludge scraping structure for a sedimentation tank with inclined plates 4 for wastewater treatment. It includes a sedimentation tank body 1, with a wastewater inlet pipe 2 and a clean water outlet pipe 3 penetrating through the side wall of the sedimentation tank body 1. The wastewater inlet pipe 2 and the clean water outlet pipe 3 are used to realize the process of wastewater inflow and purified water outflow. Multiple inclined plates 4 are fixedly connected inside the sedimentation tank body 1. The inclined plates 4 not only effectively increase the sedimentation area but also guide the water flow to form a stable laminar flow state, thereby improving the settling efficiency of suspended solids and allowing sludge to quickly settle to the bottom of the tank body for subsequent processing. Centralized discharge treatment: At least one filter shell 5 is installed at the upper end of multiple inclined plates 4 inside the sedimentation tank 1. Multiple flow holes 7 are opened on the side wall of the filter shell 5. The flow holes 7 are used for the water that has settled in the multiple inclined plates 4 inside the sedimentation tank 1. One end of the clear water discharge pipe 3 extends into the filter shell 5. A filter assembly is slidably connected inside the filter shell 5 at the position outside the clear water discharge pipe 3. The filter assembly filters the water flowing in through the flow holes 7 in two stages. Float-cutting plates 16 are fixedly connected to both ends of the filter assembly. Float-cutting plates 16 are used to prevent floating objects at high water levels from spreading into the filter assembly.
[0019] It should be noted that the sludge scraping and discharge structure of the inclined plate sedimentation tank for wastewater treatment achieves a high degree of integration of multiple functions such as sedimentation, filtration, sludge discharge and anti-floating objects through the setting of filter shell 5, two-stage filter components and flotation plate 16. It has the advantages of compact structure, simple operation and high purification efficiency, and is suitable for various application scenarios such as urban sewage treatment and industrial wastewater treatment.
[0020] A connecting bracket 6 is fixedly connected to the top of the filter housing 5. The connecting bracket 6 is fixedly connected to the top of the sedimentation tank 1. The connecting bracket 6 is made of metal or high-strength engineering plastic, which has good load-bearing capacity and corrosion resistance. The inner side of the connecting bracket 6 is fixedly connected to the filter housing 5, and the outer side of the connecting bracket 6 is connected to the top structure of the sedimentation tank 1, so that the filter housing 5 is stably installed in the space of the sedimentation tank 1, ensuring that it will not be displaced or tilted due to water flow impact or equipment vibration during long-term operation. The inner wall of the filter housing 5 is provided with a sliding groove 1 and a sliding groove 2, which are arranged in a vertical direction to form a sliding fit with the filter assembly. Through this sliding connection method, the filter assembly can move up and down along the sliding groove direction, which is convenient for maintenance personnel to disassemble, clean or replace the filter screen, etc., improving the maintainability and ease of use of the equipment.
[0021] The filter assembly includes a sludge collection base plate 8, which has a receiving groove larger than the cross-sectional size of the clean water discharge pipe 3. Two filter screens 9 are fixedly connected to the top of the sludge collection base plate 8. A connecting plate 10 is fixedly connected between the two filter screens 9. A connecting plate 21 is fixedly connected to the opposite sides of the two filter screens 9. Filter screens 13 are fixedly connected to the side walls of the two connecting plates 11. A connecting plate 314 is fixedly connected to the adjacent ends of the filter screens 13. Two buoyancy cut-off plates 16 are fixedly connected to the outer side walls of the two filter screens 13. The buoyancy cut-off plates 16 are inclined from the top of the filter screens 13 toward the top of the filter shell 5. The filtration aperture of the filter screens 9 is smaller than that of the filter screens 13.
[0022] It should be noted that the two filter screens 9 are symmetrically distributed and arranged around the clean water discharge pipe 3. Each filter screen 9 is made of stainless steel wire mesh or porous plastic material, which has good permeability and anti-clogging ability, and can effectively intercept fine suspended particles remaining in the water. The two filter screens 9 are fixedly connected by connecting plate 10 to enhance the overall rigidity and stability of the structure. The two filter screens 13 are fixedly connected to the outer walls of the two connecting plates 11 respectively, and are fixedly connected between their adjacent ends by connecting plate 14. Connecting plate 14 not only plays a role in structural reinforcement, but also, together with filter screens 13 and connecting plate 11, forms a filter layer with a concave hollow structure, so that the water flow can achieve full contact and buffering in this hollow area, thereby improving the filtration efficiency and avoiding the filtration effect due to water flow short circuit or excessive local flow velocity.
[0023] Two connecting plates 11 are fixedly connected to the outer walls of the two connecting plates 11. The sliding block 12 can slide along the inner wall of the sliding groove 1. The connecting plate 3 14 is fixedly connected to the outer wall of the two connecting plates 15. The sliding block 15 can slide along the inner wall of the sliding groove 2. The top of the sliding block 12 and the sliding block 15 are respectively fixedly connected to the pull block 17. The pull block 17 is made of anti-slip material or has anti-slip texture on the surface, which is easy to hold manually. When it is necessary to clean the filter assembly, simply hold the pull block 17 and pull it outward along the direction of the sliding groove to pull the entire filter assembly out of the filter shell 5, exposing the dirt collection bottom plate 8 below. The dirt collection bottom plate 8 serves as the bottom structure of the filter assembly and is used to collect suspended solids, silt and other impurities that are intercepted in the water flow. After the filter assembly is pulled out as a whole, the user can directly rinse it or clean it manually, effectively preventing the accumulation of impurities from affecting the subsequent filtration effect.
[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A sludge scraping structure for an inclined plate sedimentation tank for wastewater treatment, comprising multiple inclined plates (4) fixedly connected inside a sedimentation tank body (1), wherein a wastewater inlet pipe (2) and a clean water outlet pipe (3) are respectively provided through the side wall of the sedimentation tank body (1), characterized in that: At least one filter shell (5) is provided at the upper end of multiple inclined plates (4) inside the sedimentation tank (1). Multiple flow holes (7) are provided on the side wall of the filter shell (5). One end of the clear water discharge pipe (3) extends into the filter shell (5). A filter assembly is slidably connected inside the filter shell (5) at the position outside the clear water discharge pipe (3). Both ends of the filter assembly are fixedly connected to a buoyancy plate (16).
2. The sludge scraping structure of the inclined plate sedimentation tank for wastewater treatment according to claim 1, characterized in that: The filter shell (5) is fixedly connected to the top of a connecting bracket (6), which is fixedly connected to the top of the sedimentation tank (1). The inner wall of the filter shell (5) is provided with a sliding groove one and a sliding groove two.
3. The sludge scraping structure of the inclined plate sedimentation tank for wastewater treatment according to claim 2, characterized in that: The filter assembly includes a sludge collection base plate (8), on which a receiving groove larger than the cross-sectional size of the clean water discharge pipe (3) is provided. Two filter screens (9) are fixedly connected to the top of the sludge collection base plate (8), and a connecting plate (10) is fixedly connected between the two filter screens (9). A connecting plate (11) is fixedly connected to the opposite sides of the two filter screens (9), and a filter screen (13) is fixedly connected to the side walls of the two connecting plates (11). A connecting plate (14) is fixedly connected to the adjacent ends of the filter screens (13).
4. The sludge scraping structure of the inclined plate sedimentation tank for wastewater treatment according to claim 3, characterized in that: The two buoyancy cut-off plates (16) are fixedly connected to the outer walls of the two filter screens (13) respectively, and the buoyancy cut-off plates (16) are inclined from the top of the filter screens (13) to the top of the filter shell (5).
5. The sludge scraping structure of the inclined plate sedimentation tank for wastewater treatment according to claim 4, characterized in that: The outer walls of the two connecting plates (11) are fixedly connected to sliders (12), which can slide along the inner wall of the groove. The outer walls of the connecting plates (14) are fixedly connected to sliders (15), which can slide along the inner wall of the groove.
6. The sludge scraping structure of the inclined plate sedimentation tank for wastewater treatment according to claim 5, characterized in that: The tops of slider one (12) and slider two (15) are respectively fixedly connected to pull blocks (17).
7. The sludge scraping structure of the inclined plate sedimentation tank for wastewater treatment according to claim 6, characterized in that: The pore size of filter screen one (9) is smaller than that of filter screen two (13).