A rectangular peripheral-in and peripheral-out two-sedimentation-tank water inlet system scum cleaning system

Abstract

The utility model discloses a rectangular week in week out two sedimentation tank water system scum cleaning system, including the water distribution channel above the suspension rectangular week in week out two sedimentation tank, set along the water distribution channel length direction, one end with water supply device intercommunication's pool water supply pipe and be connected in pool water supply pipe lower extreme and along pool water supply pipe length direction interval even setting's multiple branch water supply pipe, every branch water supply pipe's lower extreme all are connected with water distribution channel water surface present preset angle setting and distance water surface height 40 400mm's nozzle. The present application is set along the water distribution channel length direction multiple specific height nozzles, and water flow is sprayed to the water surface at the preset angle, can carry out comprehensive, sustained disturbance and push to the scum in the water distribution channel, effectively avoid the scum gathering and caking, solve the water distribution obstruction problem caused by artificial cleaning not in time, ensure two sedimentation tank water distribution evenness and work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of sewage treatment technology, and in particular relates to a scum removal system for a rectangular perimeter inlet and outlet secondary sedimentation tank inlet system. Background Technology

[0002] In the activated sludge process for wastewater treatment, the secondary sedimentation tank is an indispensable and crucial component. As the final process unit in the secondary wastewater treatment flow, its core function is to effectively separate the sludge-water mixture, thereby achieving effluent clarification, sludge thickening, and activated sludge recirculation. The operational efficiency of the secondary sedimentation tank is paramount, directly affecting the quality of the secondary effluent and significantly influencing the concentration of sludge returned to the biological treatment system. It plays a vital role in bridging the upstream and downstream processes of the entire wastewater treatment process.

[0003] However, during the operation of the secondary sedimentation tank, a certain amount of scum will inevitably be generated on the surface of its water distribution channel. This scum mainly comes from the scum carried by the effluent from the upstream biological treatment system. If it is not cleaned in time, it will not only damage the appearance of the secondary sedimentation tank, but more seriously, the scum will gradually accumulate and clump on the surface of the water distribution channel, thereby interfering with the water distribution process, significantly reducing the working efficiency of the secondary sedimentation tank, and affecting the overall effect of sewage treatment.

[0004] Currently, the mainstream method for scum removal in the industry is manual cleaning, which involves manually opening the weir gate at the end of the distribution channel to discharge the scum. However, this method has significant drawbacks: firstly, because the scum accumulates quickly and is prone to caking, frequent cleaning is required, undoubtedly consuming substantial labor costs; secondly, with more and more wastewater treatment plants adopting underground structures, the difficulty of manual scum removal has increased significantly, making it difficult to meet actual operational needs. Furthermore, for secondary sedimentation tanks with a perimeter inlet and outlet design, the cross-section of the distribution channel is gradually changing. This unique structural feature makes it impossible to install mechanical structures such as scrapers for scum skimming like in conventional tanks, making scum removal even more prominent and becoming one of the key bottlenecks restricting the operating efficiency and treatment effect of secondary sedimentation tanks. Utility Model Content

[0005] In view of the technical problems mentioned in the background, the purpose of this application is to provide a scum removal system for a rectangular circumferential inlet and outlet secondary sedimentation tank inlet system.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] A scum removal system for a rectangular circumferential inlet and outlet secondary sedimentation tank includes an in-tank water supply pipe suspended above a water distribution channel of the rectangular circumferential inlet and outlet secondary sedimentation tank, arranged along the length of the water distribution channel, with one end connected to a water supply device, and multiple branch water supply pipes connected to the lower end of the in-tank water supply pipe and evenly spaced along the length of the in-tank water supply pipe. The lower end of each branch water supply pipe is connected to a nozzle that is set at a preset angle to the water surface of the water distribution channel and is 40-400mm above the water surface.

[0008] The preset angle is 90 degrees.

[0009] The water supply pipes in the pool are either one installed in a single rectangular circumferential inlet and outlet secondary sedimentation tank or multiple installed in multiple rectangular circumferential inlet and outlet secondary sedimentation tanks, and one or more water supply pipes in the pool are connected to the water supply device.

[0010] The water supply device includes a main water supply pipe equipped with a pump and a filter, and the water supply pipes in the one or more pools are connected to the main water supply pipe.

[0011] An air vent valve is installed at the lowest point of the main water supply pipe.

[0012] Each of the branch water supply pipes is equipped with a first control switch that can adjust the flow rate of the branch water supply pipe.

[0013] Each of the one or more water supply pipes in the pool is equipped with a second control switch that can adjust the flow rate of the water supply pipe in the pool.

[0014] The main water supply pipe and the water supply pipe in the pool are both DN40 UPVC pipes, and the branch water supply pipes are DN15 UPVC pipes.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] (1) By setting multiple nozzles at specific heights along the length of the water distribution channel, water can be sprayed onto the water surface at a preset angle, which can comprehensively and continuously disturb and push the scum in the water distribution channel, effectively preventing the scum from accumulating and clumping, solving the problem of water distribution obstruction caused by untimely manual cleaning, and ensuring the uniformity of water distribution and work efficiency of the secondary sedimentation tank.

[0017] (2) In view of the gradually changing cross section of the water distribution channel of the rectangular perimeter inlet and outlet secondary sedimentation tank, a combination design of suspended water supply pipeline and nozzle is adopted, which does not require the installation of mechanical structures such as scrapers, perfectly adapts to its special structure, and overcomes the technical bottleneck that traditional mechanical slag skimming methods cannot be applied.

[0018] (3) It replaces the traditional manual sludge removal method and achieves sludge removal through automated or semi-automated water jet spraying, reducing the need for frequent manual operation. It is especially suitable for underground sewage treatment plants, reducing the intensity of manual labor and the difficulty of operation.

[0019] (4) The first control switch on the branch water supply pipe can adjust the flow rate of each nozzle individually, and the second control switch on the water supply pipe in the pool can adjust the overall water supply intensity to adapt to uneven distribution of scum.

[0020] (5) A filter is installed in the water supply device to prevent impurities from clogging the nozzles; the vent valve at the lowest point of the main water supply pipe facilitates system venting and maintenance.

[0021] (6) UPVC pipes are used (the main water supply pipe and the water supply pipe in the pool are DN40, and the branch water supply pipes are DN15), which have strong corrosion resistance, extend service life, and reduce operating costs.

[0022] (7) The system can be connected to multiple water supply pipes in the pool through the main water supply pipe, and simultaneously serve multiple rectangular perimeter inlet and perimeter outlet secondary sedimentation tanks, meeting the large-scale needs of large-scale sewage treatment plants. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the scum removal system of the rectangular perimeter inlet and perimeter outlet secondary sedimentation tank in an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the structure of the branch water supply pipe provided in the embodiments of this application;

[0025] Figure 3 A schematic diagram of the scum removal system structure of a rectangular perimeter-inlet and perimeter-outlet secondary sedimentation tank water inlet system with multiple in-tank water supply pipes provided in the embodiments of this application. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0029] like Figure 1-3 The diagram shows the structure of an embodiment of this application.

[0030] This embodiment provides a scum removal system for a rectangular circumferential inlet and outlet secondary sedimentation tank. The system includes an in-tank water supply pipe 3 suspended above a water distribution channel 2 of the rectangular circumferential inlet and outlet secondary sedimentation tank 1, arranged along the length of the water distribution channel 2, with one end connected to a water supply device, and multiple branch water supply pipes 4 connected to the lower end of the in-tank water supply pipe 3 and evenly spaced along the length of the in-tank water supply pipe 3. Each branch water supply pipe 4 has a nozzle 5 connected to its lower end, which is set at a preset angle to the water surface of the water distribution channel and is 40-400mm above the water surface.

[0031] It should be noted that the rectangular circumferential inlet and outlet secondary sedimentation tank includes a tank body, which is rectangular. A water distribution channel is provided on the side of the tank body, and a slag discharge weir is provided at the end of the water distribution channel. An inlet slag cleaning system is provided above the water surface of the water distribution channel.

[0032] When in use, high-pressure water is sprayed out through nozzle 5 to flush the scum on the surface of the water distribution channel, breaking up the scum that has accumulated and hardened on the water surface into small pieces. Some of the scum enters the pool with the water flow to settle, while some can be carried out by the water flow from the end scum discharge weir gate, thereby achieving the removal effect, saving labor costs and improving removal efficiency.

[0033] In addition, the flushing structure of this utility model uses recycled water 12 from the plant area, which saves water resources and is an environmentally friendly sewage treatment device.

[0034] Preferably, the preset angle is 90 degrees, which is the angle between the nozzle and the liquid surface.

[0035] Preferably, the water supply pipe 3 in the pool is one installed in a single rectangular circumferential inlet and outlet secondary sedimentation tank or multiple installed in multiple rectangular circumferential inlet and outlet secondary sedimentation tanks, and one or more water supply pipes 3 in the pool are connected to the water supply device.

[0036] It should be noted that the rectangular perimeter inlet and perimeter outlet sedimentation tank is a single tank or multiple tanks arranged side by side. Therefore, the water supply pipe 3 in the tank is set as one or more of the corresponding pipes.

[0037] Preferably, the water supply device includes a main water supply pipe 8 equipped with a pump 11 and a filter 10, and the one or more pool water supply pipes 3 are connected to the main water supply pipe 8.

[0038] The main water supply pipe is equipped with a filter that can automatically backwash when clogged by impurities, extending the service life of the water supply pipe and nozzles. The size of the filter mesh is determined according to the size of the impurity particles contained in the water supply that need to be intercepted.

[0039] Preferably, an air vent valve 9 is provided at the lowest point of the main water supply pipe 8.

[0040] It should be noted that a vent valve is installed at the lowest point of the main water supply pipe, which can drain the entire system to prevent freezing in low temperatures.

[0041] Preferably, each of the branch water supply pipes 4 is provided with a first control switch 6 that can adjust the flow rate of the branch water supply pipe 4.

[0042] Preferably, each of the one or more water supply pipes 3 in the pool is equipped with a second control switch 7 that can adjust the flow rate of the water supply pipe 3 in the pool.

[0043] Preferably, the main water supply pipe 8 and the water supply pipe 3 in the pool are both DN40 UPVC pipes, and the branch water supply pipe 4 is a DN15 UPVC pipe.

[0044] It should be noted that all solutions not detailed in this application employ publicly known technologies.

[0045] 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 preferred examples and are not intended to limit the 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. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A scum removal system for a rectangular circumferential inlet and outlet secondary sedimentation tank, characterized in that, It includes a water distribution channel (2) suspended above the rectangular circumferential inlet and outlet sedimentation tank (1), an in-tank water supply pipe (3) set along the length of the water distribution channel (2) and connected to a water supply device at one end, and multiple branch water supply pipes (4) connected to the lower end of the in-tank water supply pipe (3) and evenly spaced along the length of the in-tank water supply pipe (3). Each branch water supply pipe (4) is connected to a nozzle (5) at the lower end, which is set at a preset angle to the water surface of the water distribution channel and is 40-400mm above the water surface.

2. The scum removal system for a rectangular circumferential inlet and outlet secondary sedimentation tank according to claim 1, characterized in that, The preset angle is 90 degrees.

3. The scum removal system for a rectangular circumferential inlet and outlet secondary sedimentation tank according to claim 1, characterized in that, The water supply pipe (3) in the pool is one set in a single rectangular circumferential inlet and outlet secondary sedimentation tank or multiple set in multiple rectangular circumferential inlet and outlet secondary sedimentation tanks, and one or more water supply pipes (3) in the pool are connected to the water supply device.

4. The scum removal system for a rectangular circumferential inlet and outlet secondary sedimentation tank according to claim 3, characterized in that, The water supply device includes a main water supply pipe (8) equipped with a pump (11) and a filter (10), and the one or more pool water supply pipes (3) are connected to the main water supply pipe (8).

5. The scum removal system for a rectangular circumferential inlet and outlet secondary sedimentation tank according to claim 4, characterized in that, An air vent valve (9) is installed at the lowest point of the main water supply pipe (8).

6. The scum removal system for a rectangular circumferential inlet and outlet secondary sedimentation tank according to claim 4, characterized in that, Each of the branch water supply pipes (4) is provided with a first control switch (6) that can adjust the flow rate of the branch water supply pipe (4).

7. A scum removal system for a rectangular circumferential inlet and outlet secondary sedimentation tank according to claim 4, characterized in that, Each of the one or more water supply pipes (3) in the pool is equipped with a second control switch (7) that can adjust the flow rate of the water supply pipe (3) in the pool.

8. The scum removal system for a rectangular circumferential inlet and outlet secondary sedimentation tank according to claim 4, characterized in that, The main water supply pipe (8) and the water supply pipe (3) in the pool are both DN40 UPVC pipes, and the branch water supply pipe (4) is a DN15 UPVC pipe.

Images