Pipeline overflow treatment devices and methods

Abstract

This application discloses a pipeline overflow treatment device and method, belonging to the field of water treatment technology. The pipeline overflow treatment device includes a regulating tank with an overflow inlet for receiving pipeline overflow. The regulating tank has multiple storage areas arranged in the flow direction of the pipeline overflow. The pipeline overflow can flow through each storage area sequentially. Later-flowing pipeline overflow can push earlier-flowing pipeline overflow into a storage area away from the overflow inlet, thus diverting the pipeline overflow flowing in sequentially and storing it in different storage areas. The pipeline overflow treatment device provided by this application allows the regulating tank to divert the pipeline overflow flowing in sequentially and store it in different storage areas, thereby diverting the pipeline overflow according to the pollution load. This facilitates precise treatment by subsequent processes based on the pollution load, reduces the processing volume of subsequent processes, and lowers the cost of pipeline overflow treatment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water treatment, in particular to a pipe network overflow treatment device and a treatment method. BACKGROUND

[0002] The pipe network overflow contains a large amount of suspended solids, organic pollutants, nitrogen and phosphorus nutrients, pathogenic microorganisms, and even new pollutants such as persistent organic pollutants, antibiotics, and microplastics. In particular, the pollutant concentration in the initial pipe network overflow is high. If these pollutants enter the receiving water body with the pipe network overflow, the self-purification function of the water body will be affected, and the ecological balance of the water environment will be destroyed. Therefore, the pipe network overflow needs to be treated. However, the flow of the pipe network overflow is usually large, resulting in high pipe network overflow treatment cost. SUMMARY

[0003] The present application provides a pipe network overflow treatment device and a treatment method, which can solve the technical problem of high pipe network overflow treatment cost.

[0004] To solve the above technical problem, the present application provides a pipe network overflow treatment device in one aspect. The pipe network overflow treatment device comprises a regulating and storage tank. An overflow inlet for introducing the pipe network overflow is arranged on the regulating and storage tank. The regulating and storage tank is provided with a plurality of storage areas. The plurality of storage areas are arranged in the flow direction of the pipe network overflow. The pipe network overflow can flow through each storage area in sequence. The pipe network overflow flowing later can push the pipe network overflow flowing earlier into the storage area away from the overflow inlet, so as to separate the pipe network overflow flowing earlier and later and store them in different storage areas respectively.

[0005] The present application provides a pipe network overflow treatment method in another aspect. The method comprises: introducing the pipe network overflow into the regulating and storage tank. The pipe network overflow flowing into the regulating and storage tank in sequence is stored in different storage areas respectively, so as to separate the pipe network overflow according to the pollution load.

[0006] The pipe network overflow treatment device provided by the present application is provided with a plurality of storage areas in the regulating and storage tank. The plurality of storage areas are arranged in the flow direction of the pipe network overflow. The pipe network overflow flowing later can push the pipe network overflow flowing earlier into the storage area away from the overflow inlet. The pipe network overflow flowing earlier and later is separated and stored in different storage areas respectively, so as to separate the pipe network overflow according to the pollution load. The subsequent treatment process can be accurately treated according to the pollution load. Partial pipe network overflow with high pollution load can be selectively treated. The treatment amount of the subsequent treatment process is reduced, and the pipe network overflow treatment cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description only represent some embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without any creative effort are within the protection scope of the present application.

[0008] Figure 1 is a sectional structure schematic diagram of a pipe network overflow treatment device according to an embodiment of the present application along a vertical view;

[0009] Figure 2 is a structure schematic diagram of another embodiment of the pipe network overflow treatment device according to the present application;

[0010] Figure 3 is a sectional structure schematic diagram of a storage and adjustment tank according to an embodiment of the present application along a vertical view;

[0011] Figure 4 is a sectional structure schematic diagram of a sedimentation tank according to an embodiment of the present application along a horizontal view;

[0012] Figure 5 is a sectional structure schematic diagram of the sedimentation tank according to an embodiment of the present application along a vertical view;

[0013] Figure 6 is a flow schematic diagram of a pipe network overflow treatment method according to an embodiment of the present application;

[0014] Figure 7 is a flow schematic diagram of another embodiment of the pipe network overflow treatment method according to the present application. DETAILED DESCRIPTION

[0015] The present application will be further described in detail below in combination with the drawings and embodiments. It is particularly pointed out that the following embodiments are only used to illustrate the present application, but do not limit the scope of the present application. Similarly, the following embodiments are only some embodiments of the present application, but not all embodiments, and all other embodiments obtained by those of ordinary skill in the art without any creative effort are within the protection scope of the present application.

[0016] In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited. The terms "first", "second", "third" in the embodiments of the present application are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", "third" can be explicitly or implicitly included at least one of the features. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly. The terms "include" and "have" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or components inherent to the process, method, product or device.

[0017] Reference herein to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0018] The present application provides a pipe network overflow treatment device. Please refer to Figure 1 The pipe network overflow treatment device 100 can include a surge tank 10. The surge tank 10 can store pipe network overflow. With climate change, the risk of pipe network overflow is increasing, and its high flux characteristics are becoming increasingly prominent. By setting the surge tank 10 to store pipe network overflow, the design capacity of the downstream combined dry pipe and intercepting pump station can be reduced, thereby controlling pipe network overflow pollution. The surge tank 10 is in the shape of a cylinder, and the cross section of its cavity can be circular, elliptical or polygonal, etc. The volume of the surge tank 10 can be determined according to the pipe network overflow calculation.

[0019] Please continue to refer to Figure 1The overflow inlet 111 is arranged on the storage tank 10 for connecting the pipe network overflow. The storage tank 10 is provided with a plurality of storage areas 113 arranged in the flow direction of the pipe network overflow. For example, when the cross section of the storage tank 10 is rectangular, the pipe network overflow can flow in the storage tank 10 from one side of the rectangular cavity to the opposite side, and the plurality of storage areas 113 are arranged at the opposite ends of the rectangular cavity. When the cross section of the storage tank 10 is circular or elliptical, the pipe network overflow can flow along the circumferential direction of the circular or elliptical cavity in the storage tank 10, and the plurality of storage areas 113 are arranged along the circumferential direction of the cavity. The pipe network overflow can flow through the storage areas 113 in sequence, and the later pipe network overflow can push the earlier pipe network overflow into the storage area 113 away from the overflow inlet 111, so as to separate and store the earlier and later pipe network overflows in different storage areas 113. Specifically, the earlier pipe network overflow can be stored in the storage area 113 away from the overflow inlet 111, and the later pipe network overflow can be stored in the storage area 113 close to the overflow inlet 111 in sequence, so as to store the earlier and later pipe network overflows in different storage areas 113.

[0020] Generally, the pipe network overflow flowing into the storage tank 10 at the initial stage contains more pollutants, which is high-pollution-load overflow. The pipe network overflow flowing into the storage tank 10 at the middle and later stages contains less pollutants, which is low-pollution-load overflow. In the traditional storage scheme, the pipe network overflows flowing in at the initial stage and the middle and later stages are mixed together, and it is difficult to separate the high-pollution-load overflow and the low-pollution-load overflow, which increases the processing amount of the subsequent treatment process and leads to high processing cost. The pipe network overflow treatment device 100 provided in the present application is provided with the storage tank 10 having a plurality of storage areas 113 arranged in the flow direction of the pipe network overflow. The later pipe network overflow can push the earlier pipe network overflow into the storage area 113 away from the overflow inlet 111, so as to separate and store the earlier and later pipe network overflows in different storage areas 113, thereby separating the pipe network overflow according to the pollution load, facilitating accurate treatment of the subsequent treatment process according to the pollution load. The middle and later low-pollution-load overflows meeting the discharge standard can be directly discharged, and part of the high-pollution-load pipe network overflow can be selectively treated, which reduces the processing amount of the subsequent treatment process and can reduce the pipe network overflow treatment cost.

[0021] Optionally, in an embodiment, as Figure 2As shown, the pipe network overflow treatment device 100 further comprises a sedimentation tank 20 and a micro-electric coagulation tank 30. The sedimentation tank 20 is provided with an inlet area 21 for receiving the pipe network overflow discharged from the storage area 113 of the storage tank 10 for further treatment. The storage tank 10 divides the pipe network overflow and stores the pipe network overflow with different pollution loads in different storage areas 113. The pipe network overflow with high pollution load is stored in the storage area 113 far from the overflow inlet 111. Generally, the pipe network overflow with high pollution load needs further treatment. Therefore, the part of the storage area 113 far from the overflow inlet 111 is connected with the inlet area 21 of the sedimentation tank 20, so that the pipe network overflow with high pollution load can enter the sedimentation tank 20 for subsequent treatment. The particulate matter in the pipe network overflow can be precipitated in the sedimentation tank 20, so as to quickly filter and separate the particulate matter. The sedimentation tank 20 is provided with a plurality of sedimentation plates 22 for accelerating the precipitation of the particulate matter in the pipe network overflow, so as to improve the treatment efficiency of the pipe network overflow.

[0022] The micro-electric coagulation tank 30 is used for electrolytic treatment of the pipe network overflow treated by the sedimentation tank 20. Through in-situ coagulation and electrolytic oxidation-reduction, the non-settleable micro-particle pollutants and dissolved nitrogen and phosphorus pollutants in the pipe network overflow treated by the sedimentation tank 20 can be removed, so as to improve the purification effect of the pipe network overflow. The bottom of the micro-electric coagulation tank 30 is connected with the inlet area 21 of the sedimentation tank 20, so that part of the pipe network overflow located at the bottom of the micro-electric coagulation tank 30 can be returned to the sedimentation tank 20. The flocculation in the pipe network overflow is deposited at the bottom of the micro-electric coagulation tank 30. Part of the pipe network overflow located at the bottom of the micro-electric coagulation tank 30 is returned to the sedimentation tank 20. The flocculation and the pipe network overflow are fully mixed, so as to provide part of the flocculation for the sedimentation tank 20, form a re-flocculation process, accelerate the precipitation of the particulate matter in the pipe network overflow, further improve the precipitation treatment efficiency of the sedimentation tank 20, reduce the amount of pollutants in the pipe network overflow delivered from the sedimentation tank 20 to the micro-electric coagulation tank 30, and reduce the material and energy input in the electrolytic coagulation process of the micro-electric coagulation tank 30.

[0023] Please refer to Figure 2 In an embodiment, the pipe network overflow treatment device 100 further comprises a first water pump 40, a second water pump 50 and a pollutant collection tank 60. The first water pump 40 is arranged between the storage tank 10 and the sedimentation tank 20, and is used for delivering the pipe network overflow discharged from the storage tank 10 to the sedimentation tank 20 for further treatment. The second water pump 50 is arranged between the micro-electric coagulation tank 30 and the sedimentation tank 20, and is used for delivering part of the pipe network overflow located at the bottom of the micro-electric coagulation tank 30 back to the sedimentation tank 20. The pollutant collection tank 60 is connected with the storage tank 10, the sedimentation tank 20 and the micro-electric coagulation tank 30, and is used for collecting the pollutants, such as sludge, deposited at the bottom of the storage tank 10, the sedimentation tank 20 and the micro-electric coagulation tank 30.

[0024] In an embodiment, as shown in Figure 1As shown, the surge tank 10 comprises a surge tank body 11, a plurality of overflow plates 12 and a plurality of flow baffles 13. The plurality of overflow plates 12 are arranged in intervals along the direction of the pipe network overflow flow, and the overflow plates 12 are arranged on the bottom wall of the surge tank body 11. Two adjacent overflow plates 12 and the surge tank body 11 form a storage area 113. The overflow plates 12 are arranged between two adjacent storage areas 113 to prevent the mixing of pipe network overflows with different pollution loads.

[0025] Please continue to refer to Figure 1 , the flow baffles 13 are arranged in intervals corresponding to the overflow plates 12. Optionally, the flow baffles 13 are connected to the top wall and the side wall of the surge tank body 11. The projection of the flow baffles 13 and the overflow plates 12 on the plane perpendicular to the direction of the pipe network overflow flow overlaps, that is, the flow baffles 13 and the overflow plates 12 are staggered in the vertical direction. The flow baffles 13 are arranged in the upper part of two adjacent storage areas 113 to block the flow of the pipe network overflow. The lower part of the flow baffles 13 is arranged in intervals with the bottom wall of the surge tank body 11, and the pipe network overflow can only flow along the gap between the lower part of the flow baffles 13 and the bottom wall of the surge tank body 11 and the gap between the flow baffles 13 and the overflow plates 12, so that the pipe network overflow can flow along the inner wall of each storage area 113. The direction of the pipe network overflow flow is shown by the arrow in Figure 1 . By staggering the flow baffles 13 and the overflow plates 12 in the vertical direction, the pipe network overflow flows along the inner wall of each storage area 113, and the pipe network overflow flowing in later can push the pipe network overflow flowing in earlier into the storage area 113 away from the overflow inlet 111, thereby separating the pipe network overflows flowing in earlier and later and storing them in different storage areas 113.

[0026] In an embodiment, as Figure 1As shown, the distance between the lower part of the baffle 13 and the bottom wall of the storage tank body 11 is 10-50 cm, and the distance between the adjacent baffle 13 and the overflow plate 12 is 10-50 cm. If the distance between the lower part of the baffle 13 and the bottom wall of the storage tank body 11 is greater than 50 cm, the distance between the lower part of the baffle 13 and the bottom wall of the storage tank body 11 is large, and the center line of the flow line of the pipe network overflow is far away from the bottom wall of the storage tank body 11, so that the flow rate of the pipe network overflow at the bottom wall of the storage tank body 11 is small, and part of the pollutants may not flow with the pipe network overflow and deposit on the bottom wall of the storage tank body 11, which will affect the effect of shunting the pipe network overflow according to the pollution load; if the distance between the lower part of the baffle 13 and the bottom wall of the storage tank body 11 is less than 10 cm, the distance between the lower part of the baffle 13 and the bottom wall of the storage tank body 11 is small, which will affect the flow of the pipe network overflow and reduce the shunting efficiency. Alternatively, the distance between the lower part of the baffle 13 and the bottom wall of the storage tank body 11 can be 10 cm, 20 cm, 30 cm, 40 cm, 50 cm, etc., which is not limited here. Correspondingly, in order to match the flow between the baffle 13 and the overflow plate 12 and the flow between the lower part of the baffle 13 and the bottom wall of the storage tank body 11, the distance between the adjacent baffle 13 and the overflow plate 12 is set to 10-50 cm.

[0027] Alternatively, the height of each overflow plate 12 can be adjusted. The storage area 113 is formed by the adjacent two overflow plates 12 and the storage tank body 11, and the height of each overflow plate 12 is adjusted, so that the volume of each storage area 113 can be adjusted, so that the height of the overflow plate 12 can be adjusted according to the pipe network overflow flow, so that the pipe network overflow flowing in sequence can be shunted and stored in the preset different storage areas 113. Specifically, if the pipe network overflow flow is large, the height of the overflow plate 12 can be increased to increase the volume of the storage area 113; correspondingly, if the pipe network overflow flow is small, the height of the overflow plate 12 can be reduced to reduce the volume of the storage area 113, so that the pipe network overflow under different flow rates can be shunted and stored in the preset different storage areas 113, to facilitate the subsequent treatment process to accurately treat according to the pollution load. The height adjustment mode of the overflow plate 12 can be automatic equipment adjustment or manual adjustment, which is not limited here.

[0028] In some embodiments, the ratio of the height of the overflow plate 12 to the height of the storage tank body 11 is 0.5-0.9. If the ratio of the height of the overflow plate 12 to the height of the storage tank body 11 is less than 0.5, the volume of the storage area 113 is small, which will reduce the utilization rate of the storage tank 10; if the ratio of the height of the overflow plate 12 to the height of the storage tank body 11 is greater than 0.9, the spacing between the top of the overflow plate 12 and the top wall of the storage tank body 11 is small, which will affect the flow of the pipe network overflow, and the pipe network overflow stored in each storage area 113 is more, and there is a risk of mixing of pipe network overflows with different pollution loads, which may affect the effect of shunting pipe network overflow according to pollution load. Alternatively, the ratio of the height of the overflow plate 12 to the height of the storage tank body 11 can be 0.5, 0.6, 0.7, 0.8, 0.9, etc.

[0029] Please refer to Figure 3 In an embodiment, the storage tank 10 is provided with a buffer area 112, which is close to the overflow inlet 111, and the pipe network overflow can flow into the storage area 113 through the buffer area 112, and the buffer area 112 is used for energy dissipation and speed reduction of the pipe network overflow. By providing the buffer area 112, the pipe network overflow can be energy dissipated and speed reduced before flowing into the storage area 113, thereby reducing the flow rate of the pipe network overflow, preventing the pipe network overflow with different pollution loads from mixing, and improving the effect of shunting the pipe network overflow according to the pollution load.

[0030] The way to energy dissipate and speed reduce the pipe network overflow can be to place rubber rods, plastic pads, etc. in the storage tank body 11. In an embodiment, as shown in Figure 3 The storage tank 10 includes a plurality of drop plates 14, which are divided into two groups and vertically correspondingly spaced apart in the buffer area 112, and the orthographic projection of the adjacent two drop plates 14 on the horizontal plane overlaps, so as to guide the pipe network overflow to constantly change the flow direction between the plurality of drop plates 14, thereby energy dissipating and speed reducing the pipe network overflow. Alternatively, one group of drop plates 14 can be connected to the side wall of the storage tank body 11 on the side close to the overflow inlet 111, and the opposite group of drop plates 14 is connected to the flow baffle 13. By providing the staggered drop plates 14, the pipe network overflow can be energy dissipated and speed reduced, and the installation of the drop plates 14 is simple, which can reduce the cost.

[0031] In some embodiments, the ratio of the spacing between the adjacent two drop plates 14 to the height of the storage tank body 11 is 0.1-0.2. In this way, the spacing between the adjacent two drop plates 14 is not too large to affect the effect of energy dissipation and speed reduction of the drop plates 14 on the pipe network overflow, and the spacing is not too small to meet the flow of the pipe network overflow and ensure the shunting efficiency.

[0032] Please refer to Figure 4 , Figure 5In an embodiment, the angle between the sedimentation plate 22 and the horizontal plane is 45-60 degrees, the direction of the pipe network overflow flowing into the sedimentation tank 20 is parallel to the plane where the sedimentation plate 22 is located, and the sedimentation plate 22 is provided with a plurality of V-shaped grooves extending along the vertical direction of the sedimentation plate 22. The extension directions of the plurality of V-shaped grooves can be arranged parallel to each other, thereby forming an inclined baffle plate. Compared with the inclined baffle plate in the conventional inclined plate sedimentation tank, by arranging a plurality of V-shaped grooves extending along the vertical direction of the sedimentation plate 22 on the sedimentation plate 22, the surface area of the sedimentation plate 22 is increased, more attachment points can be provided for the particulate matter, thereby accelerating the precipitation of the particulate matter in the pipe network overflow, and the treatment efficiency of the pipe network overflow can be improved. In some embodiments, the opening angle of the V-shaped groove can be 80-100 degrees, such as 80 degrees, 85 degrees, 90 degrees, 95 degrees, 100 degrees, etc.; the angle between the sedimentation plate 22 and the horizontal plane can be 45 degrees, 50 degrees, 55 degrees, 60 degrees, etc. It is found that when the opening angle of the V-shaped groove and the angle between the sedimentation plate 22 and the horizontal plane are within the above ranges, the treatment efficiency of the particulate matter precipitation can be improved. Field test research shows that by the above arrangement, the total suspended solid particulate matter removal efficiency is more than 85%, and the removal rates of COD (Chemical Oxygen Demand) and total phosphorus are both more than 60%.

[0033] In an embodiment, as Figure 2As shown, the micro-electric coagulation tank 30 comprises an electrolytic cavity 31 and a collecting cavity 32 connected in series, the electrolytic cavity 31 is communicated with the water outlet of the sedimentation tank 20, and the collecting cavity 32 is in the shape of a cone. The bottom of the collecting cavity 32 is communicated with the water inlet area 21 of the sedimentation tank 20, so that the part of the pipe network overflow located at the bottom of the micro-electric coagulation tank 30 after sedimentation can flow back to the sedimentation tank 20. Exemplarily, the electrolytic cavity 31 can be in the shape of a cylinder, the collecting cavity 32 can be in the shape of a cone, and the slope of the collecting cavity 32 can be 0.01-0.02, so as to facilitate the collection of the flocculation deposited at the bottom of the collecting cavity 32. The electrolytic cavity 31 is provided with a water outlet 311 for discharging the pipe network overflow treated by electrolysis. Optionally, the installation elevation of the micro-electric coagulation tank 30 is lower than that of the sedimentation tank 20, and exemplarily, the micro-electric coagulation tank 30 can be buried underground. By setting the installation elevation of the micro-electric coagulation tank 30 lower than that of the sedimentation tank 20, a hydrostatic pressure can be generated in the electrolytic cavity 31, so that the clean overflow located in the upper part of the electrolytic cavity 31 after electrolytic treatment can be discharged from the water outlet 311. The electrolytic cavity 31 is provided with a plurality of electrolytic electrode pairs 312, the positive and negative electrodes of the electrolytic electrode pairs 312 are spaced apart by 1 / 8-1 / 12 of the cross-sectional dimension of the micro-electric coagulation tank 30 in the horizontal plane, and the working voltage of the electrolytic electrode pairs 312 is less than or equal to 10V. By controlling the spacing between the positive and negative electrodes of the electrolytic electrode pairs 312, the electrolytic electrode pairs 312 can neither be spaced too far apart to ensure the effect of electrolytic treatment, nor be spaced too close together to improve the utilization rate of electric energy and reduce costs. Setting the working voltage of the electrolytic electrode pairs 312 to be less than or equal to 10V can ensure the safety of the operation of the electrolytic electrode pairs 312 and reduce the use cost.

[0034] In an embodiment, the effective volume of the micro-electric coagulation tank 30 is greater than or equal to 3 times the effective volume of the sedimentation tank 20, so that the micro-electric coagulation tank 30 has a relatively large effective volume, which can ensure the time of coagulation and sedimentation and electrolytic oxidation processes in the micro-electric coagulation tank 30, so as to ensure the effect of electrolysis and sedimentation treatment.

[0035] The present application provides a pipe network overflow treatment method. Please refer to Figure 6 , the pipe network overflow treatment method 700 can comprise the following steps S710:

[0036] S710, the pipe network overflow is introduced into the storage tank 10, and the pipe network overflow flowing into the storage tank 10 in sequence is stored in different storage areas 113, so as to shunt the pipe network overflow according to the pollution load.

[0037] The pipe network overflow treatment method 700 provided in the application can facilitate subsequent treatment processes to accurately treat according to the pollution load by shunting the pipe network overflow according to the pollution load, wherein the middle and late low pollution load overflow meeting the emission standard can be directly discharged, and part of the high pollution load pipe network overflow can be selectively treated, thereby reducing the treatment capacity of the subsequent treatment process and reducing the pipe network overflow treatment cost.

[0038] In an embodiment, as shown in FIG. 7, the pipe network overflow treatment method 700 includes S710-S730: Figure 7

[0039] S710, introducing the pipe network overflow into the storage tank 10, and storing the pipe network overflow flowing into the storage tank 10 in different storage areas 113 in sequence to shunt the pipe network overflow according to the pollution load;

[0040] S720, introducing the pipe network overflow needing further treatment shunted by the storage tank 10 into the sedimentation tank 20 to make the particulate matter in the pipe network overflow precipitate in the sedimentation tank 20;

[0041] S730, introducing the pipe network overflow treated by the sedimentation tank 20 into the micro-electric coagulation tank 30 to electrolytically treat the pipe network overflow, and conveying part of the pipe network overflow precipitated at the bottom of the micro-electric coagulation tank 30 to the sedimentation tank 20. The pipe network overflow flowing back from the micro-electric coagulation tank 30 to the sedimentation tank 20 can be 5%-15% of the pipe network overflow in the micro-electric coagulation tank 30.

[0042] In the pipe network overflow treatment method 700 described above, first, the storage tank 10 shunts the pipe network overflow according to the pollution load, thereby reducing the treatment capacity of the subsequent treatment process and reducing the pipe network overflow treatment cost; second, the pipe network overflow is treated by the sedimentation tank 20 and the micro-electric coagulation tank 30 in sequence, which can quickly remove the particulate matter precipitated in the pipe network overflow and the non-settleable small particulate pollutants, dissolved nitrogen and phosphorus pollutants, etc., thereby improving the treatment efficiency and purification effect of the pipe network overflow; in addition, part of the pipe network overflow precipitated at the bottom of the micro-electric coagulation tank 30 is flowed back to the sedimentation tank 20 to provide part of the floc for the sedimentation tank 20, thereby further improving the sedimentation treatment efficiency of the sedimentation tank 20.

[0043] The pipe network overflow treatment device and treatment method provided in the application have at least the following beneficial effects:

[0044] ​1. The regulating tank 10 is equipped with multiple storage areas 113, which are arranged in the flow direction of the pipeline overflow. The pipeline overflow that flows in later can push the pipeline overflow that flows in earlier into the storage area 113 away from the overflow inlet, so that the pipeline overflow that flows in later is divided and stored in different storage areas 113 respectively. This allows the pipeline overflow to be divided according to the pollution load, which facilitates the subsequent treatment process to treat it accurately according to the pollution load, reduces the treatment volume of the subsequent treatment process, and can reduce the cost of pipeline overflow treatment.

[0045] 2. The pipeline overflow treatment device 100 also includes a sedimentation tank 20 and a micro-electro-coagulation tank 30. First, the pipeline overflow is diverted according to the pollution load through the regulating tank 10, reducing the treatment volume of subsequent treatment processes and lowering the cost of pipeline overflow treatment. Second, the pipeline overflow is treated sequentially by the sedimentation tank 20 and the micro-electro-coagulation tank 30, which can quickly remove particulate matter sediments, non-settling micro-particulate pollutants, dissolved nitrogen and phosphorus pollutants, etc., from the pipeline overflow, improving the treatment efficiency and purification effect of the pipeline overflow. In addition, the portion of the pipeline overflow that is settled at the bottom of the micro-electro-coagulation tank 30 is returned to the sedimentation tank 20, providing some flocs to the sedimentation tank 20, which can further improve the sedimentation treatment efficiency of the sedimentation tank 20.

[0046] 3. The regulating tank 10 includes a regulating tank body 11, multiple overflow plates 12 and multiple baffle plates 13. The baffle plates 13 and overflow plates 12 are arranged in a one-to-one correspondence and at intervals. The baffle plates 13 and overflow plates 12 are arranged alternately in the vertical direction, so that the pipeline overflow flows along the inner wall of each storage area 113. The pipeline overflow that flows in later can push the pipeline overflow that flows in earlier into the storage area 113 away from the overflow inlet 111, thereby diverting the pipeline overflow that flows in later and storing it in different storage areas 113.

[0047] 4. The height of each overflow plate 12 is adjustable, so that the volume of each storage area 113 is adjustable. Thus, the height of the overflow plate 12 can be adjusted according to the overflow flow of the pipeline network, so that the pipeline overflow under different flow rates can be diverted and stored in different preset storage areas 113 respectively, so as to facilitate subsequent treatment processes to accurately treat according to the pollution load.

[0048] 5. The storage tank 10 is equipped with a buffer zone 112, which can dissipate energy and slow down the overflow of the pipeline network before it flows into the storage area 113, thereby reducing the flow velocity of the pipeline network overflow, preventing the pipeline network overflows of different pollution loads from mixing, and improving the effect of diverting pipeline network overflows according to pollution load.

[0049] 6. The angle between the sedimentation plate 22 and the horizontal plane is 45-60 degrees. The sedimentation plate 22 is provided with multiple V-shaped grooves extending vertically along the sedimentation plate 22, which can accelerate the sedimentation of particulate matter in the pipeline overflow and improve the treatment efficiency of pipeline overflow.

[0050] The above merely illustrates some embodiments of the present application, and is not intended to limit the protection scope of the present application. Any equivalent device or equivalent process transformation, or direct or indirect application in other related technical fields, which is made according to the content of the present application, shall be included in the patent protection scope of the present application.

Claims

1. A pipe network overflow treatment device, characterized by, The device comprises a regulating and storing tank, a sedimentation tank and a micro-electric coagulation tank. The regulating and storing tank is provided with overflow inlets for receiving overflow from a pipe network. The regulating and storing tank is provided with multiple storage areas arranged along the flow direction of the overflow from the pipe network. The overflow from the pipe network flows through the multiple storage areas in sequence. The overflow from the pipe network that flows later pushes the overflow from the pipe network that flows earlier into the storage area away from the overflow inlets, so as to separate and store the overflow from the pipe network in different storage areas. The overflow from the pipe network that flows initially is stored in the storage area away from the overflow inlets. The sedimentation tank is provided with an inlet area for receiving the overflow from the pipe network that needs to be treated further. The sedimentation tank is provided with multiple sedimentation plates for accelerating the sedimentation of particulate substances in the overflow from the pipe network. The micro-electric coagulation tank is used for electrolytic treatment of the overflow from the pipe network that has been treated in the sedimentation tank. The bottom of the micro-electric coagulation tank is in communication with the inlet area of the sedimentation tank, so that part of the overflow from the pipe network that is located at the bottom of the micro-electric coagulation tank after sedimentation flows back to the sedimentation tank. The micro-electric coagulation tank is arranged to provide part of floc for the sedimentation tank. The regulating and storing tank comprises a regulating and storing tank body, multiple overflow plates and multiple flow baffles. The multiple overflow plates are arranged along the flow direction of the overflow from the pipe network. The overflow plates are arranged on the bottom wall of the regulating and storing tank body. Two adjacent overflow plates and the regulating and storing tank body form a storage area. The flow baffles and the overflow plates are arranged in pairs. The projection of the flow baffles and the overflow plates on a plane perpendicular to the flow direction of the overflow from the pipe network overlaps. The lower part of the flow baffles is arranged away from the bottom wall of the regulating and storing tank body, so that the overflow from the pipe network flows along the inner wall of each storage area. The distance between the lower part of the flow baffles and the bottom wall of the regulating and storing tank body is 10-50 cm. The distance between two adjacent flow baffles and overflow plates is 10-50 cm. The height of each overflow plate can be adjusted. The ratio of the height of the overflow plate to the height of the regulating and storing tank body is 0.5-0.

9.

2. The pipe network overflow handling apparatus of claim 1, wherein The regulating and storing tank is provided with a buffer area. The buffer area is close to the overflow inlets. The overflow from the pipe network flows into the storage area through the buffer area. The buffer area is used for energy dissipation and speed reduction of the overflow from the pipe network.

3. A pipe network overflow treatment device according to claim 2, characterised in that, The regulating and storing tank comprises multiple drop water plates. The multiple drop water plates are divided into two groups and arranged in pairs in the vertical direction in the buffer area. The projection of two adjacent drop water plates on a plane overlaps, so as to guide the overflow from the pipe network to change the flow direction constantly between the multiple drop water plates. The ratio of the distance between two adjacent drop water plates to the height of the regulating and storing tank body is 0.1-0.

2.

4. The pipe network overflow handling apparatus of claim 1, wherein The angle between the sedimentation plates and a horizontal plane is 45-60 degrees. The direction of the overflow from the pipe network flowing into the sedimentation tank is parallel to the plane where the sedimentation plates are located. The sedimentation plates are provided with multiple V-shaped grooves extending in the vertical direction of the sedimentation plates.

5. The pipe network overflow handling apparatus of claim 1, wherein The micro-electric coagulation tank comprises an electrolysis cavity and a collecting cavity connected in series, the electrolysis cavity is communicated with the water outlet of the sedimentation tank, and the collecting cavity is in the shape of a cone, the bottom of the collecting cavity is communicated with the water inlet area of the sedimentation tank; The electrolysis cavity is provided with a water outlet for discharging the pipe network overflow treated by electrolysis, a plurality of electrolysis electrode pairs are arranged in the electrolysis cavity, the spacing between the positive and negative electrodes of the electrolysis electrode pair in the horizontal plane is 1 / 8-1 / 12 of the cross-sectional dimension of the micro-electric coagulation tank, and the working voltage of the electrolysis electrode pair is less than or equal to 10V.

6. The pipe network overflow handling apparatus of claim 1, wherein The effective volume of the micro-electric coagulation tank is greater than or equal to 3 times the effective volume of the sedimentation tank.

7. A pipe network overflow treatment method for the pipe network overflow treatment device according to any one of claims 1 to 6, characterized by Comprise: The pipe network overflow is introduced into the storage tank, and the pipe network overflows flowing into the storage tank in sequence are respectively stored in different storage areas to shunt the pipe network overflows according to pollution load, wherein the pipe network overflow with high pollution load is stored in the storage area far away from the overflow water inlet; The pipe network overflow shunted out by the storage tank and needing further treatment is introduced into the sedimentation tank to make the particulate matter in the pipe network overflow precipitate in the sedimentation tank; The pipe network overflow treated by the sedimentation tank is introduced into the micro-electric coagulation tank for electrolytic treatment, and part of the pipe network overflow precipitated and located at the bottom of the micro-electric coagulation tank is transported to the sedimentation tank to make the micro-electric coagulation tank provide part of the flocculus for the sedimentation tank.

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