Settling tank with sludge backflow function

Abstract

The utility model discloses a sedimentation tank with a sludge backflow function, which is characterized in that a drainage plate is arranged in the sedimentation tank, and the periphery of the drainage plate is connected with the side wall of the sedimentation tank; partition plates are arranged on the drainage plate and divide the drainage plate into four independent areas, and the four independent areas incline from the periphery to the middle of the partition plates. A sludge pipe is arranged in the middle of the drainage plate and is used for outputting sludge in the sedimentation tank; a sewage pipe is arranged at the position, close to the middle of the drainage plate, of the drainage plate, a lifting mechanism is arranged below the sewage pipe, and the sewage pipe is used for outputting sewage in the sedimentation tank. The drainage plate inclining towards the middle is arranged in the sedimentation tank, sludge is conveyed to the middle of the drainage plate under the influence of gravity, and then the sludge is discharged through the sludge pipe; the sewage pipe with the telescopic height is arranged on the drainage plate, upper-layer sewage is discharged by controlling the height of the sewage pipe during sludge sedimentation, and then sludge is discharged by opening the sludge pipe, so that the sewage treatment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sedimentation tanks, and particularly relates to a sedimentation tank with a sludge reflux function. Background Art

[0002] The purpose of reflux sludge is to maintain a certain suspended solid concentration (MLSS) in the aeration tank or reaction tank, that is, to maintain a certain concentration of microorganisms to ensure the sewage treatment effect. The flow rate of reflux sludge is usually determined according to the designed reflux sludge ratio (R) of the sewage treatment plant. This ratio is the ratio of the reflux sludge volume to the influent volume, and is generally set by the design institute according to the designed influent concentration during the construction of the sewage treatment plant.

[0003] Sludge reflux can be controlled and adjusted in various ways to maintain the stability of the sludge concentration in the aeration tank or reaction tank. A common method is to adjust the operation of the reflux sludge pump according to the sludge level in the secondary sedimentation tank to avoid sludge loss caused by too high sludge level in the secondary sedimentation tank. Another method is to determine the reflux ratio by measuring the sludge sedimentation ratio (SV) or the mixed liquor sludge concentration (MLSS) and adjust it as needed. In actual operation, the management personnel of the sewage treatment plant will determine the optimal reflux sludge volume and reflux ratio according to daily experience and observation results, combined with the sludge sedimentation curve and the properties of activated sludge. And the reflux sludge will be reused after reflux: after the reflux sludge is reintroduced into the aeration tank or reaction tank, it will be mixed with the influent water and continue to participate in the sewage treatment process; the microorganisms in the reflux sludge will continue to decompose and remove the organic matter and pollutants in the water to achieve the purification and treatment of sewage.

[0004] However, at present, the reflux sludge is pumped into the sedimentation tank by a reflux pump. Due to the high content of primary sedimentation sludge, it is easy to block the pipelines in the subsequent process, and the conveying pressure of the pipelines is large, which affects the sewage treatment efficiency. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the above deficiencies, and provides a sedimentation tank with a sludge reflux function, expecting to improve the problem that the high sludge content during the primary sedimentation of sewage causes a large conveying pressure on the pipelines.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A sedimentation tank with a sludge return function comprises a sedimentation tank, wherein a drainage plate is arranged inside the sedimentation tank, and the drainage plate is connected to the side wall of the sedimentation tank on all sides; a partition is arranged on the drainage plate, and the partition divides the drainage plate into four independent areas, and the four independent areas are inclined from all sides to the middle of the partition; a sludge pipe is arranged in the middle of the drainage plate, and the input end of the sludge pipe is consistent with the height of the drainage plate, and the sludge pipe is used to output the sludge in the sedimentation tank; a sewage pipe is arranged on the drainage plate, and the sewage pipe corresponds to the position in the middle of the drainage plate, and a lifting mechanism is arranged under the sewage pipe, and the sewage pipe is used to output the sewage in the sedimentation tank; wherein the telescopic length of the sewage pipe is controlled by the depth of accumulated water in the sedimentation tank.

[0008] A further technical solution is: the drainage plate is in a shape with high edges and low middle, the sludge pipe is arranged at the center of the drainage plate, and there is a gap between the sewage pipe and the sludge pipe.

[0009] A further technical solution is: slideways are provided on both sides of the partition, the slideways are horizontally distributed along the partition, and scrapers are connected to the slideways, and the scrapers are used to scrape the sludge on the drainage plate.

[0010] A further technical solution is: the two ends of the scraper are connected to the slide on the partition, and the scraper slides on the partition through the slide; the scraper includes a connecting part, and the two ends of the connecting part are respectively provided with a first groove and a second groove, there is a height difference between the first groove and the second groove, and the first groove and the second groove are nested with each other.

[0011] A further technical solution is that the scraper includes a plurality of connecting parts, and the first groove and the second groove are respectively provided on one side where two adjacent connecting parts are close to each other, and the scraper is extended and retracted by nesting the first groove and the second groove.

[0012] A further technical solution is: a water inlet pipe is provided at a position of the side wall of the sedimentation tank higher than the drainage plate, and the water inlet pipe is used to introduce sewage into the sedimentation tank.

[0013] A further technical solution is that the sludge pipe and the sewage pipe both penetrate the drainage plate, and the sludge pipe and the sewage pipe are connected to external pipelines through the bottom plate of the sedimentation tank.

[0014] A further technical solution is that the sludge pipe and the sewage pipe are controlled to be opened or closed by valves.

[0015] A further technical solution is: a plurality of sewage pipes are provided, and the sewage pipes are connected to a drain pipe under the drainage plate, and the drain pipe is used to discharge the sewage out of the sedimentation tank.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model improves the sewage treatment efficiency by setting a diversion plate inclined towards the middle in the sedimentation tank, using the influence of gravity to send the sludge to the middle of the diversion plate, and then discharging the sludge through the sludge pipe; and a sewage pipe with a telescopic height is arranged on the diversion plate. When the sludge settles, the upper-layer sewage is first discharged by controlling the height of the sewage pipe, and then the sludge is discharged by opening the sludge pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the external structure of the sedimentation tank of the utility model;

[0019] Figure 2 It is a sectional view of the sedimentation tank of the utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the diversion plate of the utility model;

[0021] Figure 4 It is a schematic diagram of the distribution of the sewage pipe of the utility model;

[0022] Figure 5 It is a schematic diagram of the structure of the connecting part of the utility model.

[0023] Identification description: 1. Sedimentation tank; 2. Diversion plate; 3. Water inlet pipe; 4. Sludge pipe; 5. Sewage pipe; 6. Drain pipe; 7. Bottom plate; 8. Partition plate; 9. Scraper; 91. Connecting part; 92. First groove; 93. Second groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present utility model will be further described below with reference to the accompanying drawings.

[0025] Embodiment 1.

[0026] As Figure 1-2 shown, an embodiment of the present utility model is a sedimentation tank with a sludge reflux function, including a sedimentation tank 1. A diversion plate 2 is arranged inside the sedimentation tank 1, and the periphery of the diversion plate 2 is connected to the side wall of the sedimentation tank 1; a partition plate 8 is arranged on the diversion plate 2, and the partition plate divides the diversion plate 2 into four independent areas, and the four independent areas are all inclined from the periphery towards the middle of the partition plate 8; a sludge pipe 4 is arranged in the middle of the diversion plate 2, and the sludge pipe 4 is at the same height as the diversion plate 2, and the sludge pipe 4 is used to output the sludge in the sedimentation tank 1; a sewage pipe 5 is arranged at a position close to the middle of the diversion plate 2 on the diversion plate 2, and a lifting mechanism is arranged below the sewage pipe 5, and the sewage pipe 5 is used to output the sewage in the sedimentation tank 1; wherein, the telescopic length of the sewage pipe 5 is controlled by the depth of the accumulated water in the sedimentation tank 1.

[0027] The sedimentation tank 1 is constructed of reinforced concrete or corrosion-resistant materials and has sufficient volume to accommodate the sewage to be treated and the sludge generated by sedimentation; the inclined drainage plate 2 is installed inside the sedimentation tank 1 and is closely connected to the side walls of the sedimentation tank around, ensuring that there is no sewage bypass. The drainage plate 2 is designed with a structure that gradually inclines from the periphery to the center, and the inclination angle is optimized and calculated to maximize the use of gravity to promote the convergence of sludge to the center; the partition plate 8 is arranged at the center position of the drainage plate 2, dividing the drainage plate 2 into four equal independent areas. Each area follows the principle of inclining from the periphery to the center, further refining the sludge flow path and improving the sedimentation efficiency.

[0028] The sludge pipe 4 is located below the center of the drainage plate 2 and is flush with the surface of the drainage plate. It is controlled by a valve and is used to regularly discharge the sludge converged at the center to the subsequent treatment unit.

[0029] The sewage pipe 5 is installed at a position close to the center but higher than the sludge pipe on the drainage plate. There is a lifting mechanism below it. The lifting mechanism can be an existing lifting mechanism. The lifting mechanism drives the input end of the sewage pipe 5 to adjust the height, and can automatically adjust the height according to the water depth in the sedimentation tank 1. A filter screen is provided at the bottom of the sewage pipe 5 to prevent the sludge from being discharged by mistake, and only the upper clear water is allowed to pass through.

[0030] Sewage inlet stage: The sewage to be treated enters the sedimentation tank through the inlet and is evenly distributed throughout the sedimentation tank 1.

[0031] Gravity sedimentation stage: As the sewage stands still, due to the action of gravity, the suspended substances and larger particles in the sewage begin to settle and move towards the center along the inclined drainage plate 2. The presence of the partition plate 8 enhances the efficiency of this process, enabling the sediment in each area to converge faster.

[0032] Sewage discharge stage: When a relatively clear water layer forms on the upper layer of the sedimentation tank 1, the lifting mechanism automatically adjusts the sewage pipe 5 to an appropriate height according to the preset water depth threshold, opens the valve, discharges the upper clear water, reduces the subsequent treatment load, and can also control the volume of the discharged sewage by adjusting the height of the sewage pipe 5.

[0033] Sludge discharge stage: When the upper clear water is discharged to a certain extent, close the sewage pipe, open the valve of the sludge pipe, and discharge the sludge converged at the center of the drainage plate to the designated treatment area.

[0034] Through the optimized design of the drainage plate and partition plate structure, the sedimentation and convergence of sludge are accelerated, the treatment time is reduced; the sewage pipe realizes automatic operation through the lifting mechanism, flexibly adjusts according to the water depth, reduces manual intervention; effectively separates sewage and sludge, improves the water purification effect, and reduces the energy consumption in the subsequent treatment process at the same time.

[0035] This embodiment is applicable to various scenarios such as urban sewage treatment plants and industrial wastewater treatment stations, improving the overall sewage treatment efficiency and benefits.

[0036] Embodiment 2.

[0037] As Figure 3 shown, another embodiment of the present utility model is that the drainage plate 2 is in the shape of high at the edge and low in the middle, and the sludge pipe 4 is arranged at the central position of the drainage plate 2.

[0038] The drainage plate 2 is designed to be high at the edge and low in the middle. This design makes full use of the gravity principle, enabling the suspended solids and sludge in the sewage to flow and converge naturally towards the central area of the drainage plate 2 during the sedimentation process. The edge of the drainage plate 2 is closely connected to the side wall of the sedimentation tank to ensure that the sewage does not flow around the drainage plate.

[0039] The sludge pipe 4 is arranged at the central position of the drainage plate 2, that is, the focus where the sludge converges. The sludge pipe 4 is controlled by a valve. When the sludge accumulates to a certain extent at the center of the drainage plate, the valve can be conveniently opened to discharge the sludge to the subsequent treatment unit. The setting position of the sludge pipe 4 ensures that the discharged sludge is mainly high-concentration sludge, improving the efficiency and effect of sludge treatment.

[0040] Sewage entry and sedimentation: The sewage enters the sedimentation tank 1 through the water inlet and is distributed in the area above the drainage plate 2. As the sewage stands still, the suspended solids and sludge in it start to settle under the action of gravity and converge towards the center along the slope of the drainage plate 2 which is high at the edge and low in the middle.

[0041] Sludge collection: As the sedimentation process proceeds, the sludge continuously accumulates in the central area of the drainage plate 2. When the sludge accumulates to a certain amount, the valve on the sludge pipe 4 can be operated to smoothly discharge the sludge.

[0042] While the sludge is being discharged, the relatively clear accumulated water on the upper layer of the sedimentation tank 1 is retained. This part of the clear water can be further purified through subsequent treatment steps or directly used in some occasions with low water quality requirements.

[0043] The design of the drainage plate with high edge and low middle, combined with the precise setting of the sludge pipe in the center, greatly improves the efficiency of sludge collection; the sludge discharge can be achieved through simple valve control, reducing the complexity and labor intensity of manual operation; it improves the pertinence of sludge treatment, enabling the subsequent treatment unit to more efficiently treat high-concentration sludge, while retaining the available clear water resources.

[0044] Embodiment 3.

[0045] As Figure 3As shown in the figure, in one embodiment of the present utility model, slideways are provided on both sides of the partition plate 8. The slideways are horizontally distributed along the partition plate 8, and a scraping plate 9 is connected to the slideways. The scraping plate 9 is used to scrape the silt on the drainage plate 2.

[0046] The partition plate 8 not only serves as a physical barrier for dividing the drainage plate area but also has horizontally distributed slideways on both of its sides. These slideways provide a track for the movement of the scraping plate 9.

[0047] The scraping plate 9 is connected to the slideways on the partition plate 8 and is designed to be slidable along the slideways. The bottom of the scraping plate 9 closely adheres to the surface of the drainage plate 2. When the scraping plate 9 moves, it can effectively scrape and remove the silt on the drainage plate 2; the driving device provides the power required for the movement of the scraping plate, which can be a motor, a cylinder, or other forms of automatic driving devices.

[0048] After the sewage enters the sedimentation tank, it is distributed in the area above the drainage plate. As the standing time increases, the suspended solids and sludge gradually settle and converge to the center of the drainage plate. When the sedimentation tank has been operating for a period of time and the silt has accumulated to a certain thickness on the drainage plate, the driving device is started. The driving device drives the scraping plate to move along the slideways on both sides of the partition plate. The bottom of the scraping plate closely adheres to the surface of the drainage plate. The scraping plate moves from the edge of the drainage plate to the center, collecting the silt from the edge of the drainage plate to the center of the drainage plate, and then the silt is discharged through the silt pipe.

[0049] By introducing an automatic scraping and silt removal mechanism, the frequency and labor intensity of manual silt removal are reduced, and the automatic operation level of the sedimentation tank is improved; the scraping plate moves along the slideway, which can comprehensively and efficiently scrape the silt on the drainage plate, avoiding the decline in treatment efficiency caused by long-term silt accumulation; the design of the scraping plate and the slideway is relatively simple, easy to maintain and repair, and reduces the maintenance cost of the system.

[0050] Embodiment 4.

[0051] As Figure 4-5 shown, in another embodiment of the present utility model, both ends of the scraping plate 9 are connected to the slideways on the partition plate 8, and the scraping plate 9 slides on the partition plate 8 through the slideways; the scraping plate 9 includes a connecting portion 91, and first grooves 92 and second grooves 93 are respectively provided at both ends of the connecting portion 91. There is a height difference between the first grooves 92 and the second grooves 93, and the first grooves 92 and the second grooves 93 are nested with each other.

[0052] The scraping plate 9 is designed to be slidable along the partition plate slideway, and both of its ends are connected to the slideway. The scraping plate 9 includes a connecting portion 91, and first grooves 92 and second grooves 93 are provided in the connecting portion 91.

[0053] The first grooves 92 are located inside one side of the connecting portion 91 and penetrate the connecting portion 91, and are used for the connecting portions 91 to be nested with each other when the scraping plate 9 expands and contracts.

[0054] Second groove 93: Located inside the other side of the connecting part 91, there is an obvious height difference between the second groove 93 and the first groove 92.

[0055] Nested mechanism: The first groove and the second groove are designed to be a structure that can be nested with each other, so that during the sliding process of the scraper, the height of its working surface can be adjusted as needed to adapt to different thicknesses of silt.

[0056] Silt scraping: As the sedimentation tank operates, silt gradually accumulates on the drainage plate. The scraper slides along the partition slideway under the action of the driving device and starts to scrape the silt.

[0057] Adaptive adjustment: When the partition distance gradually narrows, the scraper also adaptively contracts through the drive of the drive mechanism. The inner parts of two adjacent connecting parts are the first groove and the second groove respectively, so two adjacent connecting parts can be nested with each other.

[0058] Silt collection and discharge: The scraped silt is discharged to the subsequent treatment unit through the silt pipe.

[0059] The nested groove design of the scraper enables it to make adaptive adjustments according to different distances between partitions, improving the flexibility and efficiency of silt cleaning.

[0060] Embodiment 5.

[0061] As Figure 5 shown, in one embodiment of the present utility model, the scraper 9 includes a plurality of connecting parts 91, and the first groove 92 and the second groove 93 are respectively arranged on the adjacent sides of two adjacent connecting parts 91. The scraper 9 expands and contracts through the nesting of the first groove 92 and the second groove 93.

[0062] The scraper is composed of a plurality of interconnected connecting parts 91, and each connecting part 91 is flat, facilitating sliding on the surface of the drainage plate.

[0063] The first groove 92 is located on one side of a connecting part, and its shape and size are designed to be nested with the second groove; the second groove 93 is located on the corresponding side of another connecting part 91 adjacent to the first groove 92, matching the first groove 92. Through nesting, the relative movement of the connecting part 91 is realized, so that the whole scraper 9 extends or shortens.

[0064] The expansion and contraction of the scraper 9 are controlled by a driving device (such as a motor, a cylinder, etc.), which drives the connecting part 91 to move along the slideway, and realizes the expansion and contraction adjustment of the scraper through the nesting and separation of the first groove and the second groove.

[0065] Under the action of the driving device, the scraper slides along the baffle chute from above the drainage plate towards the center of the drainage plate to start scraping the silt; during this process, it is necessary to drive the scraper to perform telescopic adjustment to adapt to the narrowing spacing between the baffles; the telescopic change of the scraper is achieved through the nesting and separation between the connecting parts; the scraped silt is discharged to the subsequent treatment unit through the silt pipe arranged at the center of the drainage plate.

[0066] High efficiency and adaptability: The nested telescopic scraper can automatically adjust its length according to the change of the spacing between the baffles, ensuring the scraping effect while reducing unnecessary friction and wear.

[0067] Improve the dredging efficiency: By setting the scraper, the silt remaining on the drainage plate can be reduced, thereby improving the dredging efficiency and achieving a better dredging effect.

[0068] Embodiment 6.

[0069] As Figure 1 shown, another embodiment of the present invention is that a water inlet pipe 3 is provided at a position on the side wall of the sedimentation tank 1 higher than the drainage plate 2, and the water inlet pipe 3 is used to introduce sewage into the sedimentation tank 1.

[0070] The water inlet pipe 3 is arranged at a position on the side wall of the sedimentation tank 1 higher than the drainage plate 2 for introducing the sewage to be treated into the sedimentation tank 1. The design of the water inlet pipe 3 should ensure that the sewage can flow into the sedimentation tank evenly and stably, avoiding direct impact on the drainage plate or forming local siltation.

[0071] Sewage introduction: The sewage to be treated is introduced into the sedimentation tank 1 through the water inlet pipe 3 from a position on the side wall of the sedimentation tank 1 higher than the drainage plate 2. Due to the higher position of the water inlet, the sewage naturally falls under the action of gravity, which helps to form a uniform flow field in the sedimentation tank.

[0072] Sewage sedimentation: The sewage entering the sedimentation tank 1 is distributed in the area above the drainage plate 2, and as the standing time increases, the suspended matter and sludge gradually settle and converge to the center of the drainage plate 2. The shape design of the drainage plate 2 accelerates this process and improves the sedimentation efficiency.

[0073] Silt treatment: When the sedimentation tank operates for a period of time and the silt accumulates to a certain thickness on the drainage plate, it can be scraped and cleaned through devices such as scrapers.

[0074] Improve the sedimentation efficiency: The side wall water inlet method helps to form a uniform flow field in the sedimentation tank, avoiding the problems of local siltation and uneven sedimentation that may be caused by the traditional bottom water inlet method, thereby improving the sedimentation efficiency.

[0075] Optimize the layout: The water inlet pipe is arranged at a position on the side wall higher than the drainage plate, which not only saves the space at the bottom of the sedimentation tank but also helps to optimize the overall layout and improve the space utilization rate.

[0076] Strong adaptability: This sedimentation tank system is particularly suitable for scenarios that require efficient treatment of a large amount of sewage, such as urban sewage treatment plants, industrial wastewater treatment stations, etc. By adjusting the number and position of the inlet pipes, it can flexibly adapt to sewage treatment projects of different scales and requirements.

[0077] Example 7.

[0078] As Figure 2 shown, in one embodiment of the present utility model, both the sludge pipe 4 and the sewage pipe 5 penetrate through the diversion plate 2, and the sludge pipe 4 and the sewage pipe 5 are connected to external pipes through the bottom plate 7 of the sedimentation tank 1. The height of the diversion plate can be adjusted according to actual usage needs.

[0079] The sludge pipe 4 penetrates through the diversion plate, with one end located below the diversion plate 2 near the sludge accumulation area, and the other end is connected to an external sludge treatment pipe through the bottom plate 7 of the sedimentation tank 1. The sludge pipe 4 is used to discharge the sludge scraped by the scraper 9 to an external treatment unit.

[0080] The sewage pipe 5 also penetrates through the diversion plate 2, but its position is usually higher than that of the sludge pipe to avoid sludge entry. One end of the sewage pipe 5 is located in the relatively clear water layer area above the diversion plate 2, and the other end is also connected to an external sewage discharge pipe through the bottom plate 7 of the sedimentation tank 1. The sewage pipe 5 is used to discharge the relatively clear sewage after sedimentation treatment to a subsequent treatment unit or directly discharge it. Since there are multiple sewage pipes 5 on the diversion plate 2, the multiple sewage pipes 5 converge into one pipe after passing through the diversion plate 2, and the sewage is discharged from this pipe to the outside of the sedimentation tank 1.

[0081] The bottom plate 7 is used to support the entire sedimentation tank 1 and serve as a channel for connecting the sludge pipe 4 and the sewage pipe 5 to external pipes.

[0082] Sewage sedimentation: After the sewage enters the sedimentation tank through the inlet pipe, it is distributed and left to settle in the area above the diversion plate. Suspended solids and sludge gradually settle to the area below the diversion plate, forming a sludge layer; while the relatively clear sewage remains in the upper water layer. At this time, the valves of both the sewage pipe and the sludge pipe are in the closed state.

[0083] Discharging sewage: After standing for a period of time, adjust the height of the sewage pipe to discharge the upper-layer sewage. At this time, the valve of the sludge pipe is in the closed state; after the upper-layer sewage is discharged, close the valve of the sewage pipe and open the valve of the sludge pipe to discharge the sludge; when a certain amount of the sludge layer is discharged, the sludge attached to the diversion plate is scraped off by the scraper. The scraper slides from the periphery of the diversion plate to the center under the action of the driving device, and during the sliding process of the scraper, the sludge can be scraped off and pushed to the mouth of the sludge pipe. The design of the sludge pipe penetrating through the diversion plate ensures the smooth discharge of the sludge and avoids interference with the upper water layer.

[0084] Sewage discharge: The relatively clear sewage after sedimentation treatment is discharged from the sedimentation tank through the sewage pipe, entering the subsequent treatment unit or being directly discharged. The location of the sewage pipe is selected to ensure that the quality of the discharged sewage meets the requirements.

[0085] Effective separation: The design of the sludge pipe and the sewage pipe running through the drainage plate realizes the effective separation and discharge of sludge and sewage, improving the sewage treatment efficiency and water quality.

[0086] Compact structure: This design saves space, making the structure of the sedimentation tank more compact, which is conducive to achieving efficient sewage treatment in a limited space.

[0087] Embodiment 8.

[0088] Another embodiment of the present utility model is that the sludge pipe 4 and the sewage pipe 5 are controlled to be opened or closed by valves.

[0089] The sludge pipe 4 is responsible for transporting the sludge accumulated at the bottom of the sedimentation tank 1 to the subsequent treatment unit. A special valve is installed on the sludge pipe 4 to control the timing and flow rate of sludge discharge.

[0090] The sewage pipe 5 discharges the sewage after preliminary sedimentation treatment from the sedimentation tank 1 for further treatment or discharge into the natural water body. The sewage pipe 5 is also equipped with a valve to achieve precise control of sewage discharge.

[0091] Valve system: It includes a sludge pipe valve and a sewage pipe valve. These valves can be manually adjusted or automatically controlled (such as controlled by a PLC system or sensors). The automatic valve can be automatically opened or closed according to preset conditions (such as sludge concentration, sewage flow rate, etc.), improving the intelligent level of the system.

[0092] Control system: It is used to monitor and manage the operating status of the entire system, including parameters such as the status of valves, pipeline pressure, and flow rate. The control system can adjust the valve opening according to the actual situation to optimize the discharge efficiency.

[0093] Sludge discharge: When the sludge in the sedimentation tank accumulates to a certain amount, the control system (if any) will send a signal to automatically open the valve on the sludge pipe, and the sludge is transported to the subsequent treatment unit through the sludge pipe under the action of gravity or a pump. After the discharge is completed, the valve automatically closes to prevent sludge backflow.

[0094] Sewage discharge: After the sewage after sedimentation treatment meets the discharge standard, it is discharged through the sewage pipe. The control system can also monitor the sewage flow rate and quality, and open the sewage pipe valve at an appropriate time for discharge. After the discharge is completed, the valve closes to maintain the sealing of the system.

[0095] The introduction of the valve system makes the discharge process of sludge and sewage more precisely controllable, reducing resource waste and environmental pollution.

[0096] Improve efficiency: The automated valves can automatically adjust the opening degree according to actual needs, improving the discharge efficiency and treatment capacity.

[0097] Reduce costs: By precisely controlling the discharge process, unnecessary energy consumption and manual intervention are reduced, lowering the operating costs.

[0098] Example 9.

[0099] As Figure 4 shown, another embodiment of the present utility model is that a plurality of sewage pipes 5 are provided, and the sewage pipes 5 are connected to a drain pipe 6 under the diversion plate 2, and the drain pipe 6 is used to discharge sewage from the sedimentation tank 1.

[0100] The sewage pipes 5 are evenly distributed on the diversion plate 2 and are used to collect the sewage that has undergone preliminary sedimentation treatment. Each sewage pipe is equipped with a valve to control the discharge of sewage as needed.

[0101] The drain pipe 6, as the main channel for sewage discharge, is connected to a plurality of sewage pipes 5. The drain pipe 6 is responsible for discharging the collected sewage from the sedimentation tank uniformly, sending it to the subsequent treatment unit or directly discharging it to a designated location.

[0102] Improve discharge efficiency: The design of multiple sewage pipes enables more comprehensive and efficient sewage collection, reducing the retention time of sewage in the sedimentation tank.

[0103] Enhance flexibility: Through the precise control of the sewage discharge flow rate and timing by the valve system, flexible adjustment can be made according to actual treatment requirements.

[0104] When referring to "one embodiment", "another embodiment", "the embodiment", etc. in this specification, it means that the specific features, structures or characteristics described in connection with that embodiment are included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in connection with any one embodiment, it is intended that the implementation of such feature, structure or characteristic in combination with other embodiments also falls within the scope of the present utility model.

[0105] Although the present utility model has been described herein with reference to a number of illustrative embodiments of the present utility model, it should be understood that those skilled in the art can design many other modifications and embodiments that will fall within the scope and spirit of the principles disclosed in this application. More specifically, within the scope of the disclosure, the drawings, and the claims of this application, various variations and improvements can be made to the components and / or the layout of the subject combination layout. In addition to the variations and improvements made to the components and / or the layout, other uses will also be apparent to those skilled in the art.

Claims

1. A sedimentation tank with sludge return function, comprising a sedimentation tank (1), characterized in that: A drainage plate (2) is provided inside the sedimentation tank (1), and the drainage plate (2) is connected to the side wall of the sedimentation tank (1) on all sides; The guide plate (2) is provided with a partition (8), the partition divides the guide plate (2) into four independent areas, and the four independent areas are all inclined from the periphery to the middle of the partition (8); A sludge pipe (4) is provided in the middle of the guide plate (2), the input end of the sludge pipe (4) is in line with the height of the guide plate (2), and the sludge pipe (4) is used to output the sludge in the sedimentation tank (1); A sewage pipe (5) is provided on the drainage plate (2), and the sewage pipe (5) corresponds to the middle position of the drainage plate (2). A lifting mechanism is provided below the sewage pipe (5), and the sewage pipe (5) is used to output the sewage in the sedimentation tank (1); The telescopic length of the sewage pipe (5) is controlled by the depth of accumulated water in the sedimentation tank (1).

2. A sedimentation tank with sludge return function according to claim 1, characterized in that: The drainage plate (2) is in a shape with high edges and low middle, the sludge pipe (4) is arranged at the center of the drainage plate (2), and there is a gap between the sewage pipe (5) and the sludge pipe (4).

3. A sedimentation tank with sludge return function according to claim 1, characterized in that: Slideways are provided on both sides of the partition (8), the slideways are horizontally distributed along the partition (8), and the slideways are connected to scrapers (9), and the scrapers (9) are used to scrape the sludge on the drainage plate (2).

4. A sedimentation tank with sludge return function according to claim 3, characterized in that: Both ends of the scraper (9) are connected to the slideways on the partition (8), and the scraper (9) slides on the partition (8) through the slideways; The scraper (9) comprises a connecting portion (91), and a first groove (92) and a second groove (93) are respectively provided at two ends of the connecting portion (91), and there is a height difference between the first groove (92) and the second groove (93), and the first groove (92) and the second groove (93) are nested with each other.

5. A sedimentation tank with sludge return function according to claim 4, characterized in that: The scraper (9) comprises a plurality of connecting parts (91), and the first groove (92) and the second groove (93) are respectively provided on the side close to two adjacent connecting parts (91), and the scraper (9) is extended and retracted by the nesting of the first groove (92) and the second groove (93).

6. A sedimentation tank with sludge return function according to claim 1, characterized in that: A water inlet pipe (3) is provided on the side wall of the sedimentation tank (1) at a position higher than the guide plate (2), and the water inlet pipe (3) is used to introduce sewage into the sedimentation tank (1).

7. The sedimentation tank with sludge return function according to claim 1, characterized in that: The sludge pipe (4) and the sewage pipe (5) both penetrate the drainage plate (2), and the sludge pipe (4) and the sewage pipe (5) are connected to external pipelines through the bottom plate (7) of the sedimentation tank (1).

8. The sedimentation tank with sludge return function according to claim 1, characterized in that: The sludge pipe (4) and the sewage pipe (5) are opened or closed by valves.

9. The sedimentation tank with sludge return function according to claim 1, characterized in that: A plurality of sewage pipes (5) are provided, and the sewage pipes (5) are connected to a drainage pipe (6) below the drainage plate (2), and the drainage pipe (6) is used to discharge sewage from the sedimentation tank (1).

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