A sewage interception and storage system including an initial rain pipe and a control method thereof

Abstract

The present invention relates to a sewage interception and regulation system and a control method thereof. The sewage interception and regulation system comprises a drainage pipe, an initial rain pipe and at least one water blocking device; the outlet of the drainage pipe is connected to the initial rain pipe, and the drainage pipe is used to discharge the initial rain water into the initial rain pipe; the initial rain pipe is provided with at least one water blocking device. The sewage interception and regulation system and regulation method of the present invention use the "pipeline regulation" method, without relying on a large number of additional regulation tanks, and only rely on the liquid level difference formed on both sides of the initial rain pipe and the water blocking device obtained by additional setting or modification to achieve the effect of interception and regulation, which significantly improves many problems in the existing regulation methods, and there is no need to consider the difficulty of modifying old pipelines too much.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment, and in particular relates to a sewage interception and storage system including an initial rainwater pipe and a control method thereof. Background Art

[0002] With the rapid development of urbanization, the urban land area has gradually expanded, and the structure of urban rainwater pipe networks has become increasingly complex, making the treatment pressure of urban rainwater treatment systems increasingly serious. Urban rainwater treatment systems have also undergone tremendous changes.

[0003] In the early days, the most commonly used system was the diversion water treatment system. Because it was not limited by land area, urban population, environmental and atmospheric pollution, it had a relatively complete rainwater pipe structure and urban sewage system, and the two were completely separated. Urban sewage directly enters the sewage treatment system through the sewage pipe network for collection and treatment; the rainwater pipe network directly receives urban rainwater and discharges it into natural water bodies, and the two do not communicate or interfere with each other. However, with the rapid increase in population, the land area is limited; continuing to use two pipe networks to treat sewage and rainwater can no longer meet the needs of social development; not only that, the advent of the industrial age has triggered a series of environmental and atmospheric pollution, resulting in a large amount of pollution sources in the initial rainwater. If it is discharged directly into natural water bodies through the rainwater pipe network without treatment, humans will no longer have clean water available. Forced by this, people began to seek new rainwater and sewage treatment systems, which are mainly divided into three types: diversion system, combined system and mixed flow system. Among them, the separate rainwater and sewage treatment system generally builds an interception well structure in a certain area of ​​the city, and effectively avoids its discharge into natural water bodies and polluting natural water bodies by accumulating the polluted initial rainwater and transporting it to the urban sewage treatment system for treatment. The combined rainwater and sewage treatment system generally builds a water treatment system shared by rainwater and sewage in a certain area of ​​the city. The mixed flow system is a new water treatment system constructed based on the above-mentioned separate system and combined system. Although the above three rainwater pipe network structures can achieve the separation of initial rainwater and mid- and late-stage rainwater to a certain extent, when actually used in the rainy season, the original sewage volume of the sewage pipe plus the initial rainwater is largely integrated into the sewage pipe and transported to the sewage treatment plant, causing serious water pressure on the sewage treatment plant. It cannot quickly achieve water treatment, and the excess water can only be discharged to the natural water body. Such a drainage system completely loses the role that the drainage system should play.

[0004] To solve the above problems, the current solution is to regulate and store the drainage system. However, the current regulation and storage system generally uses an above-ground or underground regulation and storage tank, but this regulation and storage tank requires a large area and a large excavation depth. In addition, the current land use is tight and land acquisition is also very difficult. In addition, the regulation and storage tank is concentrated in one point. As a regulation and storage tank for non-point source pollution control, it is more difficult and costly to collect the non-point source pollution load of a large area on the ground through drainage pipes into the regulation and storage tank. More importantly, the collection efficiency of the pollution load is very low, because the non-point source pollution load in a distant area is mixed with a large amount of late rainwater during the transportation from the ground to the terminal regulation and storage tank before entering the regulation and storage tank, resulting in the initial rainwater collected in the regulation and storage tank containing a large amount of late rainwater, and the average concentration of the pollution load of the collected rainwater is very low. In addition, in some areas, the transformation of existing pipelines is very difficult. These factors seriously affect the efficiency of water treatment and the actual effect of regulation and storage. Summary of the invention

[0005] In order to improve the problems existing in the prior art, the present invention provides a sewage interception and storage system including an initial rain pipe, wherein the system includes a drainage pipe, an initial rain pipe and at least one water blocking device;

[0006] The outlet of the drainage pipe is connected to the initial rain pipe, and the drainage pipe is used to discharge the initial rainwater into the initial rain pipe;

[0007] The primary rain pipe is provided with at least one water blocking device. When the water blocking device is turned on, the area of ​​the water blocking device in the primary rain pipe along the radial direction of the primary rain pipe is smaller than the cross-sectional area of ​​the primary rain pipe at the location of the water blocking device, and the primary rain pipe is located at different levels of the pipes on both sides of the water blocking device;

[0008] Wherein, when n water blocking devices are arranged to form n+1 regulating and storing areas in the primary rain pipe, the first regulating and storing area is formed between the first water blocking device and the most upstream pipeline, and the regulating and storing space formed when the first water blocking device is closed is recorded as V1, the second regulating and storing area is formed between the second water blocking device and the first water blocking device, and the regulating and storing space formed when the first water blocking device and the second water blocking device are closed is recorded as V2, and so on, the n+1 regulating and storing area is formed between the nth water blocking device and the most downstream pipeline, and the regulating and storing space formed when the nth water blocking device is closed is recorded as Vn+1;

[0009] The initial rain interception rate of the catchment area corresponding to the first storage area is Q1, the initial rain interception rate of the catchment area corresponding to the second storage area is Q2, and so on. The initial rain interception rate of the catchment area corresponding to the n+1 storage area is Qn+1, where Q1+Q2+…+Qn+Qn+1≤V1+V2+…+Vn+Vn+1.

[0010] Preferably, Q1≥V1; Q1+Q2≥V1+V2; and so on, Q1+Q2+…+Qn≥V1+V2+…+Vn, and Q1+Q2+…+Qn+Qn+1≤V1+V2+…+Vn+Vn+1.

[0011] Preferably, Q1≥V1, and Q1≤V1+V2; Q1+Q2≥V1+V2, and Q1+Q2≤V1+V2+V3; and so on, Q1+Q2+…+Qn≥V1+V2+…+Vn, and Q1+Q2+…+Qn+Qn+1≤V1+V2+…+Vn+Vn+1.

[0012] According to the present invention, n is an integer greater than 1, for example, n can be any integer between 1-100000.

[0013] According to an embodiment of the present invention, the cross-sectional area of ​​the water blocking device in the primary rain pipe is adjustable. Preferably, the cross-sectional area can be adjusted by controlling the height, width, inclination and / or thickness of the water blocking device extending in the primary rain pipe.

[0014] According to an embodiment of the present invention, one or more water blocking devices may be provided on the primary rain pipe. For example, when one water blocking device is provided, the water blocking device may divide the primary rain pipe into a regulating and storing area. For example, the primary rain pipe on one side close to the sewage treatment device and the primary rain pipe on the other side are respectively used as regulating and storing areas; when multiple water blocking devices are provided, the multiple water blocking devices may be arranged at intervals along the primary rain pipe to divide the primary rain pipe into multiple regulating and storing areas.

[0015] Preferably, at least part or all of the water blocking device is arranged in the initial rain pipe.

[0016] According to an embodiment of the present invention, the angle between the portion of the water blocking device in the primary rain pipe and the central axis of the upstream primary rain pipe can be set according to the laying slope of the primary rain pipe and the need for storage space, as long as it can form a storage space. As an example, the angle can be between 15° and 165°, preferably 20° to 90°, such as 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, or any integer or non-integer angle between the above different values.

[0017] According to an embodiment of the present invention, the water blocking device is selected from a bottom-opening weir gate, a bottom-opening gate, an eccentric blocking gate, a micro-impounding gate, an air bag, an air pillow or a pneumatic pipe clamp valve.

[0018] According to the embodiment of the present invention, the water blocking device can form a storage space in the pipeline, thereby improving the treatment pressure of the sewage treatment plant caused by the slope drop.

[0019] According to the present invention, the opening of the water blocking device refers to starting the water blocking device so that it can play an interception role, and the closing of the water blocking device refers to deactivating the water blocking device so that it no longer plays an interception role. In addition, those skilled in the art should understand that since the cross-sectional area of ​​the water blocking device in the initial rain pipe is adjustable, the term "open" includes any situation from making the water blocking device play a part of the interception role to playing a full interception role. In other words, the term "open" includes starting the water blocking device so that the water blocking device reaches a cross-sectional area greater than 0 in the initial rain pipe until it reaches 100% of the cross-sectional area that the water blocking device can reach in the initial rain pipe, which can be adjusted according to the capacity of the required storage area. The term "fully open" means starting the water blocking device to reach a cross-sectional area of ​​100% in the initial rain pipe.

[0020] According to an embodiment of the present invention, the distance between two adjacent water blocking devices can be set according to one or more factors including the length of the primary rain pipe, the treatment capacity of the sewage treatment device or sewage treatment plant, and the slope of the primary rain pipe. For example, the distance between two adjacent water blocking devices can be any suitable distance between 100-1500 meters.

[0021] For ease of understanding and description, the present invention will number the water blocking device from the farthest end (or "upstream") to the closest end (or "downstream") of the sewage treatment device or sewage treatment plant.

[0022] According to the present invention, the “downstream” refers to a position closer to a sewage treatment device or a sewage treatment plant relative to the “upstream”, and the “upstream” refers to a position farther away from a sewage treatment device or a sewage treatment plant relative to the “downstream”.

[0023] Those skilled in the art will appreciate that, depending on actual needs (such as rainfall requirements), some, but not all, of the water blocking devices may be used. It will be appreciated that in this case, the number of storage areas will also change accordingly.

[0024] According to a preferred embodiment of the present invention, when the water blocking devices are all opened, the flow rate in the primary rain pipe is the same as the flow rate of the primary rain entering the primary rain pipe.

[0025] According to a preferred embodiment of the present invention, a liquid level sensor is further provided in one or more storage areas for detecting the liquid level height of the storage area.

[0026] As an example, the upstreammost regulating storage area is recorded as the 1st regulating storage area, and the downstreammost regulating storage area is recorded as the n+1th regulating storage area in order from upstream to downstream, and each regulating storage area is provided with a corresponding preset water level, the preset water level of the 1st regulating storage area is the 1st preset water level, the preset water level of the 2nd regulating storage area is the 2nd preset water level, and so on, the preset water level of the n+1th regulating storage area is the n+1th preset water level.

[0027] According to an embodiment of the present invention, the system also includes a diversion well, a sewage pipe and a rainwater pipe, the diversion well includes a water inlet, a first water outlet, a second water outlet and a third water outlet; the water inlet is connected to the drain pipe, the first water outlet is connected to the sewage pipe, the second water outlet is connected to the rainwater pipe, and the third water outlet is connected to the primary rain pipe.

[0028] According to an embodiment of the present invention, the diversion well is used to divert domestic sewage flowing out of the drainage pipe to the sewage pipe, divert rainwater containing dirt that needs to be treated to the primary rain pipe, and divert rainwater that does not need to be treated to the rainwater pipe.

[0029] According to the present invention, the rainwater containing pollutants that needs to be treated refers to rainwater containing pollutants that needs to be treated by a sewage treatment plant or a sewage treatment device, such as initial rainwater or other rainwater containing pollutants at a level that requires treatment.

[0030] According to the present invention, the rainwater that does not require treatment refers to rainwater containing pollutants at a level lower than that requiring treatment, such as mid- to late-stage rainwater.

[0031] According to an embodiment of the present invention, the system further comprises a first water outlet pipe (or "sewer interception pipe"), a second water outlet pipe and / or a third water outlet pipe, the first water outlet is connected to the sewage pipe through the first water outlet pipe, the second water outlet is connected to the primary rainwater pipe through the second water outlet pipe, and the third water outlet is connected to the rainwater pipe through the third water outlet pipe;

[0032] Preferably, when one end of the primary rain pipe is connected to the sewage treatment device, the highest level of the primary rain pipe between the sewage treatment device and the water blocking device is less than the highest level of the primary rain pipe in other parts. More preferably, when one end of the primary rain pipe is connected to the sewage treatment device, the highest level of the primary rain pipe between the sewage treatment device and the water blocking device is less than the lowest level of the primary rain pipe in other parts.

[0033] According to an embodiment of the present invention, the system also includes a controller, which is signal-connected to the liquid level sensor and the water-blocking device, respectively, and is used to receive a liquid level height signal detected by the liquid level sensor, and control the action of the water-blocking device upstream or downstream of the storage area where the liquid level sensor is located according to the liquid level height signal.

[0034] According to the embodiment of the present invention, the selection of the controller and the way in which the controller controls the liquid level sensor are all known in the art. For example, the controller is a PLC controller known in the art.

[0035] According to an embodiment of the present invention, the drainage pipe can be a combined pipe in a combined pipe network, that is, a combined pipe formed by the confluence of a sewage pipe and a rainwater pipe; it can also be a rainwater pipe in a separate flow pipe network or a rainwater pipe in a mixed flow pipe network.

[0036] The present invention also provides a pollution interception and storage method, which includes using the pollution interception and storage system.

[0037] Preferably, when it rains, the sewage interception and storage method includes opening at least one water blocking device so that it forms a storage area in the primary rain pipe together with the pipe wall of the primary rain pipe.

[0038] According to an embodiment of the present invention, the storage regulation method may include the following steps:

[0039] T1) During rainfall, the liquid level sensor in the regulating and storing area detects the liquid level value in the regulating and storing area in real time;

[0040] T2) Rainwater containing dirt that needs to be treated flows into the primary rainwater pipe;

[0041] T3) Open all water blocking devices.

[0042] Preferably, wherein T3) comprises the following steps:

[0043] T3-1) All water blocking devices are opened to the set opening, so that the pipeline has a certain flow rate;

[0044] T3-2) when the liquid level value of the n+1 storage area is greater than or equal to the set maximum liquid level value, the nth water blocking device is fully opened, and the n+1 storage area stops taking in water;

[0045] From downstream to upstream, when the liquid level value of the i-th regulating and storage area is greater than or equal to the set maximum liquid level value, and the i-th water-blocking device to the n-th water-blocking device are all fully opened, the i-1-th water-blocking device is controlled to be fully opened, and the i-th regulating and storage area stops taking in water, where n≥i≥2.

[0046] According to an embodiment of the present invention, the storage regulation method may further include the following steps:

[0047] T4) When the rainfall decreases or stops, the water in the storage area is discharged downstream by adjusting the opening or closing status of one or more water-blocking devices, but the total amount of water discharged is kept within the treatment capacity of the sewage treatment device or sewage treatment plant.

[0048] Preferably, the water in the most downstream regulating and storing area is first discharged to the sewage treatment device or sewage treatment plant.

[0049] As an example, step T4) can be performed as follows:

[0050] T4-1) drain the water in the n+1 storage area so that the water level in the n+1 storage area drops to Hn+1;

[0051] T4-2) Close the nth water blocking device upstream to allow the water to flow into the n+1th storage area;

[0052] T4-3) the water in the n+1 storage area is discharged again, so that the water level in the storage area drops to Hn+1;

[0053] T4-4) The water blocking devices further upstream are closed in sequence until the first water blocking device is closed, and the water in the first regulating storage area is discharged so that the water level in the n+1 regulating storage area drops to Hn+1.

[0054] According to an embodiment of the present invention, the height of Hn+1 is adjusted so that the amount of water flowing from upstream to downstream is greater than the amount of water intercepted by the upstream diversion well to the primary rain pipe.

[0055] As an example, step T4) can be performed as follows:

[0056] T4-1') discharge the water in the n+1 storage area, close the nth water blocking device upstream after a certain time interval, and make the water flow into the n+1 storage area;

[0057] T4-2') After a certain time interval, the water blocking devices further upstream are closed in sequence until the first water blocking device is closed.

[0058] Beneficial Effects

[0059] The sewage interception and storage system and storage method of the present invention use the "pipeline storage" method, without relying on a large number of additional storage tanks, and only rely on the additional setting or transformation of the initial rain pipe and the liquid level difference formed on both sides of the water blocking device to achieve the effect of interception and storage, which significantly improves many problems in the existing storage method, and does not need to consider the difficulty of transformation of old pipes too much. Further, if only the inclined initial rain pipe is used, due to the effect of gravity, the water in the initial rain pipe cannot stay in the initial rain pipe, but is directly discharged to the end. A large amount of sewage is all collected at the end of the initial rain pipe in a short time, which is easy to cause excessive pressure. On the one hand, the initial rain pipe may be damaged and ruptured, and on the other hand, it may cause the water body to flow back to the diversion well, causing waterlogging, and more seriously, it flows back to the drainage pipe, causing more waterlogging and other disasters. However, the "pipeline storage" method of the present invention cleverly solves such technical problems, maximizes the use of the space in the pipeline, and reduces the number of storage tanks set along the sewage pipe as much as possible, saving the occupied area of ​​land and saving costs.

[0060] After using the device and system of the present invention, the non-point source pollution load in the area along the line can be directly connected to the primary rain pipe through the diversion well, and the collection efficiency is very high. The water blocking device can effectively intercept the water in the sewage pipe, preventing a large amount of rainwater from being discharged into the sewage treatment plant at the same time on rainy days, causing treatment pressure, and preventing the sewage treatment plant from directly discharging sewage due to limited treatment capacity.

[0061] Since the distance of pipelines is generally long, the method of the present invention can reduce the plane excavation area and significantly reduce the impact on ground traffic functions. In addition, the pipeline is easy to lay, and the pipeline can be prefabricated and laid directly on site, which is simple to construct and greatly shortens the cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 It is a structural schematic diagram of the pollution interception and storage system of Embodiment 1-3 of the present invention;

[0063] Figure 2 A schematic diagram of the structure of a sewage pipe of a sewage interception and storage system of Embodiment 2-3 of the present invention;

[0064] Figure 3 This is a schematic diagram of the structure of the sewage pipe of the sewage interception and storage system of Example 2-3 of the present invention. DETAILED DESCRIPTION

[0065] The technical solution will be further described in detail below in conjunction with specific embodiments. It should be understood that the following embodiments are only exemplary descriptions and explanations of the present invention and should not be construed as limiting the scope of protection of the present invention. All technologies implemented based on the above content of the present invention are included in the scope that the present invention is intended to protect.

[0066] Example 1

[0067] The structure of a sewage interception and storage system in this embodiment is as follows Figure 1 As shown, the system comprises:

[0068] Drain pipe 5, diversion well 4, primary rain pipe 2, sewage pipe 1, rainwater pipe 3, at least one water blocking device A, sewage interception pipe 6, second water outlet pipe 7 and third water outlet pipe 8;

[0069] The diversion well 4 includes a water inlet, a first water outlet, a second water outlet and a third water outlet; the water inlet is connected to the drain pipe 5, the first water outlet is connected to the sewage pipe 1 through the sewage interception pipe 6, the second water outlet is connected to the primary rain pipe 2 through the second water outlet pipe 7, and the third water outlet is connected to the rain pipe 3 through the third water outlet pipe 8; the diversion well is used to divert the domestic sewage flowing out of the drain pipe 5 to the sewage pipe 1, divert the rainwater containing dirt that needs to be treated to the primary rain pipe 2, and divert the rainwater that does not need to be treated to the rain pipe 3;

[0070] The primary rain pipe 2 is provided with at least one water blocking device A. When the water blocking device is turned on, the area of ​​the water blocking device in the primary rain pipe along the radial direction of the primary rain pipe is smaller than the cross-sectional area of ​​the primary rain pipe at the location of the water blocking device, and the horizontal heights of the primary rain pipe on both sides of the water blocking device are different;

[0071] Wherein, when n water blocking devices are arranged to form n+1 regulating and storing areas in the primary rain pipe, the first regulating and storing area is formed between the first water blocking device and the most upstream pipeline, and the regulating and storing space formed when the first water blocking device is closed is recorded as V1, the second regulating and storing area is formed between the second water blocking device and the first water blocking device, and the regulating and storing space formed when the first water blocking device and the second water blocking device are closed is recorded as V2, and so on, the n+1 regulating and storing area is formed between the nth water blocking device and the most downstream pipeline, and the regulating and storing space formed when the nth water blocking device is closed is recorded as Vn+1;

[0072] The initial rain interception rate of the catchment area corresponding to the first storage area is Q1, the initial rain interception rate of the catchment area corresponding to the second storage area is Q2, and so on, the initial rain interception rate of the catchment area corresponding to the n+1 storage area is Qn+1, among which, Q1≥V1, and Q1≤V1+V2; Q1+Q2≥V1+V2, and Q1+Q2≤V1+V2+V3; and so on, Q1+Q2+…+Qn≥V1+V2+…+Vn, and Q1+Q2+…+Qn+Qn+1≤V1+V2+…+Vn+Vn+1.

[0073] One or more water blocking devices may be provided on the primary rain pipe. For example, when one water blocking device is provided, the water blocking device may divide the primary rain pipe into a regulating and storing area. For example, the primary rain pipe on one side close to the sewage treatment device and the primary rain pipe on the other side are respectively used as regulating and storing areas; when multiple water blocking devices are provided, the multiple water blocking devices may be arranged at intervals along the primary rain pipe to divide the primary rain pipe into multiple regulating and storing areas.

[0074] When the water blocking devices are all opened, the flow rate in the primary rain pipe is the same as the flow rate of the primary rain entering the primary rain pipe.

[0075] Each of the regulating and storing areas is provided with a liquid level sensor for detecting the liquid level height of the regulating and storing area.

[0076] The system also includes a PLC controller, which is respectively connected to the liquid level sensor and the water blocking device for receiving a liquid level height signal detected by the liquid level sensor and controlling the action of the water blocking device upstream or downstream of the storage area where the liquid level sensor is located according to the liquid level height signal.

[0077] The volume of the initial rain pipe is greater than or equal to the total amount of collected initial rainwater.

[0078] The distance between two adjacent water blocking devices can be set according to the length of the primary rain pipe and the slope of the primary rain pipe. For example, the distance between two adjacent water blocking devices is 100-1500 meters.

[0079] There are n water-blocking devices, forming n+1 regulating and storing areas, wherein the first regulating and storing area is formed by the water-blocking device near the most upstream end and the upstream pipeline, the n+1th regulating and storing area is formed by the water-blocking device near the most downstream end and the downstream pipeline, and the remaining regulating and storing areas are formed by two adjacent water-blocking devices.

[0080] Example 2

[0081] like Figure 2 As shown, the sewage interception and storage system includes three water blocking devices, which are denoted as A-1, A-2, and A-3. The three water blocking devices form four storage areas in the initial rain pipe. The first storage area is formed between the first water blocking device A-3 and the upstream pipeline. The storage space formed when the water blocking device is closed is denoted as V1. The second storage area is formed between the second water blocking device A-2 and the first water blocking device A-1. The storage space formed when the water blocking device is closed is denoted as V2. The third storage area is formed between the third water blocking device A-1 and the second water blocking device A-2. The storage space formed when the water blocking device is closed is denoted as V3. The fourth storage area is formed between the third water blocking device A-1 and the downstream pipeline. The storage space formed when the water blocking device is closed is denoted as V4.

[0082] During rainfall, the sewage interception pipe and the first water outlet pipe of the diversion well are in an open state. The diversion well is used to intercept part of the initial rainwater or the heavily polluted rainwater in the catchment area to the sewage pipe and send it to the sewage treatment plant for treatment. Part of the initial rainwater or the heavily polluted rainwater is intercepted to the initial rain pipe, and all the water blocking devices are turned on. The turning on here means starting the water blocking device so that the water blocking device reaches any one of the conditions of the cross-sectional area in the initial rain pipe being greater than 0 and less than 100% of the cross-sectional area. This can be adjusted according to the capacity of the required storage area so that it forms a storage area in the initial rain pipe together with the pipe wall of the initial rain pipe for storage; refer to Figure 3 .

[0083] When it rains, the liquid level sensor in each storage area is used to detect the liquid level in the storage area in real time, and the detected liquid level signal is transmitted to the PLC controller. The controller compares the detection result with the preset threshold value, that is, determines the degree of closure of the water blocking device at this time, and then reasonably distributes the water to different storage areas in the initial rain pipe. The specific operations are as follows:

[0084] When it rains, firstly, the three water blocking devices along the initial rain pipe are opened. For example, when the water blocking device is a bottom-opening weir gate, the opening state is to open the bottom-opening weir gate to the set interception height H. At this time, the corresponding storage spaces in the corresponding storage area are V1', V2', V3' and V4'.

[0085] Assume that Q1 is the total amount of initial rain that needs to be intercepted to the initial rain pipe by all diversion wells connected upstream of the first interception and storage device, Q2 is the total amount of initial rain that needs to be intercepted to the initial rain pipe by all diversion wells connected between the second interception and storage device and the first interception and storage device, Q3 is the total amount of initial rain that needs to be intercepted to the initial rain pipe by all diversion wells connected between the third interception and storage device and the second interception and storage device, and Q4 is the total amount of initial rain that needs to be intercepted by all diversion wells connected downstream of the third interception and storage device;

[0086] When Q1≥V1', the first impoundment device can only intercept a water volume of V1', and the excess water (the water volume is Q1-V1') can only be discharged to the downstream end by gravity;

[0087] When Q1+Q2≥V2'+V1', the first interception device can only intercept V1' of water volume, and the second interception device can only intercept V2' of water volume. The excess water (water volume is (Q1+Q2)-(V2'+V1')) can only be discharged to the downstream end by gravity.

[0088] When Q1+Q2+Q3≥V3'+V2'+V1', the first interception device can only intercept V1' of water volume, the second interception device can only intercept V2' of water volume, and the third interception device can only intercept V3' of water volume. The excess water (water volume is (Q1+Q2+Q3)-(V3'+V2'+V1')) can only be discharged to the downstream end by gravity.

[0089] Since the 4th storage area is the last storage area, the PLC controller and liquid level sensor are used to detect the water level in the 4th storage area in real time. When it reaches the full pipe state, the 3rd interception and storage device is closed, indicating that no more water can enter the 4th storage area at this time. The water level in the 3rd storage area is detected in real time. When it reaches the full pipe state, the 2nd interception and storage device is closed, and so on. If the rainfall continues to increase, until all the interception and storage devices are closed, the primary rain pipe will no longer have the storage capacity.

[0090] In another scheme of the present embodiment, each storage area may not reach a full pipe state, for example, the three downward-opening weir gates along the initial rain pipe are opened to the set interception height H'; at this time, the corresponding storage spaces in the corresponding storage area are V1", V2", V3" and V4", and V1">V1', V2">V2', V3">V3', V4">V4'.

[0091] Example 3

[0092] When the rainfall decreases or stops, the water in the storage area is discharged downstream by adjusting the opening or closing state of one or more water blocking devices, but the total amount of water discharged does not exceed the treatment capacity of the sewage treatment device or sewage treatment plant. The water in the most downstream storage area is discharged to the sewage treatment device or sewage treatment plant first.

[0093] For example, the water in the 4th regulating storage area is discharged so that the water level in the 4th regulating storage area drops to H4; the 3rd water blocking device upstream is closed to allow the water to flow into the 4th regulating storage area; the water in the 4th regulating storage area is discharged again so that the water level in the regulating storage area drops to H4; the water blocking devices upstream are closed in turn until the 1st water blocking device is closed, and the water in the 1st regulating storage area is discharged so that the water level in the 4th regulating storage area drops to H4.

[0094] Alternatively, the following method may be adopted: drain the water in the 4th regulating and storing area, close the upstream 3rd water blocking device after a time interval of 30-60 minutes, and allow the water to flow into the 4th regulating and storing area; close the upstream 2nd water blocking device after a time interval of 30-60 minutes again, and continue in this way until the 1st water blocking device is closed.

[0095] The above is an explanation of the embodiments of the present invention. However, the present invention is not limited to the above embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for intercepting and regulating pollution, the method comprising using a system for intercepting and regulating pollution, the system comprising a drainage pipe, an initial rain pipe and at least one water blocking device; the system further comprising a diversion well, a sewage pipe and a rain pipe, the diversion well comprising a water inlet, a first water outlet, a second water outlet and a third water outlet; the water inlet is connected to the drainage pipe, the first water outlet is connected to the sewage pipe, the second water outlet is connected to the rain pipe, and the third water outlet is connected to the initial rain pipe; The drainage pipe is used to discharge the initial rainwater into the initial rain pipe; One or more water blocking devices are arranged on the primary rain pipe to divide the primary rain pipe into regulating and storing areas. When the water blocking device is opened, the area of ​​the water blocking device in the primary rain pipe along the radial direction of the primary rain pipe is smaller than the cross-sectional area of ​​the primary rain pipe at the location of the water blocking device, and the horizontal heights of the primary rain pipe on both sides of the water blocking device are different. The distance between two adjacent water blocking devices is set according to one or more factors including the length of the primary rainwater pipe, the treatment capacity of the sewage treatment device or sewage treatment plant, and the slope of the primary rainwater pipe; in, When n water blocking devices are provided to form n+1 regulating and storing areas in the primary rain pipe, the first regulating and storing area is formed between the first water blocking device and the most upstream pipeline, and the regulating and storing space formed when the first water blocking device is closed is recorded as V1, the second regulating and storing area is formed between the second water blocking device and the first water blocking device, and the regulating and storing space formed when the first water blocking device and the second water blocking device are closed is recorded as V2, and so on, the n+1 regulating and storing area is formed between the nth water blocking device and the most downstream pipeline, and the regulating and storing space formed when the nth water blocking device is closed is recorded as Vn+1; The initial rain interception amount of the catchment area corresponding to the first storage area is Q1, the initial rain interception amount of the catchment area corresponding to the second storage area is Q2, and so on, the initial rain interception amount of the catchment area corresponding to the n+1 storage area is Qn+1, where Q1≥V1; Q1+Q2≥V1+V2; and so on, Q1+Q2+…+Qn≥V1+V2+…+Vn, and Q1+Q2+…+Qn+Qn+1≤V1+V2+…+ Vn+Vn+1; n is any integer between 1 and 100,000; A liquid level sensor is also provided in one or more storage areas; The system further comprises a controller, wherein the controller is respectively connected to the liquid level sensor and the water blocking device by signals; The method comprises the following steps: When it rains, the sewage interception and storage method includes opening at least one water blocking device so that it forms a storage area in the primary rain pipe together with the pipe wall of the primary rain pipe; The method comprises the following steps: T1) During rainfall, the liquid level sensor in the regulating and storing area detects the liquid level value in the regulating and storing area in real time; T2) Rainwater containing dirt that needs to be treated flows into the primary rainwater pipe; T3) Turn on all water blocking devices; T3) The specific steps are as follows: T3-1) All water blocking devices are opened to the set opening, so that the pipeline has a certain flow rate; T3-2) When the liquid level value of the n+1 storage area is greater than or equal to the set maximum liquid level value, the nth water blocking device is fully opened, and the n+1 storage area stops inflowing water; From downstream to upstream, when the liquid level value of the i-th regulating and storage area is greater than or equal to the set maximum liquid level value, and the i-th water-blocking device to the n-th water-blocking device are all fully opened, the i-1-th water-blocking device is controlled to be fully opened, and the i-th regulating and storage area stops taking in water, where n≥i≥2.

2. The method according to claim 1, wherein: The storage method also includes the following steps: T4) When rainfall decreases or stops, the water in the storage area is discharged downstream by adjusting the opening or closing status of one or more water-blocking devices, but the total amount of water discharged is kept within the treatment capacity of the sewage treatment device or sewage treatment plant.

3. The method according to claim 2, wherein: The water in the downstream storage area should be discharged to the sewage treatment device or sewage treatment plant first.

4. The method according to claim 2, wherein: Step T4) is performed as follows: T4-1) Drain the water in the n+1 storage area so that the water level in the n+1 storage area drops to Hn+1; T4-2) Close the nth water blocking device upstream to allow the water to flow into the n+1th regulation and storage area; T4-3) Drain the water in the n+1 storage area again, so that the water level in the storage area drops to Hn+1; T4-4) Close the water blocking devices further upstream in sequence until the first water blocking device is closed, and drain the water in the first storage area so that the water level in the n+1 storage area drops to Hn+1; Alternatively, step T4) is performed as follows: T4-1') discharge the water in the n+1 storage area, close the nth water blocking device upstream after a certain time interval, and make the water flow into the n+1 storage area; T4-2') After a certain time interval, the water blocking devices further upstream are closed in sequence until the first water blocking device is closed.

5. The method according to claim 1, wherein Q1≥V1, and Q1≤V1+V2; Q1+Q2≥V1+V2, and Q1+Q2≤V1+V2+V3; and so on, Q1+Q2+…+Qn≥V1+V2+…+Vn, and Q1+Q2+…+Qn+Qn+1≤V1+V2+…+ Vn+Vn+1.

6. The method according to claim 1, wherein the cross-sectional area of ​​the water blocking device in the primary rain pipe is adjusted by controlling the height, width, inclination and / or thickness of the water blocking device extending in the primary rain pipe.

7. The method according to claim 1, wherein the water blocking device is selected from a bottom-opening weir gate, a bottom-opening gate, an eccentric blocking gate, a micro-impounding gate, an air bag, an air pillow or a pneumatic pipe clamp valve.

8. The method according to claim 1, wherein the system further comprises a first water outlet pipe, a second water outlet pipe and / or a third water outlet pipe, the first water outlet is connected to the sewage pipe through the first water outlet pipe, the second water outlet is connected to the primary rainwater pipe through the second water outlet pipe, and the third water outlet is connected to the rainwater pipe through the third water outlet pipe.

9. The method according to claim 1, wherein when one end of the primary rain pipe is connected to the sewage treatment device, the highest level of the primary rain pipe between the sewage treatment device and the water blocking device is less than the highest level of other parts of the primary rain pipe.

10. The method according to claim 1, wherein when one end of the primary rain pipe is connected to a sewage treatment device, the highest level of the primary rain pipe between the sewage treatment device and the water blocking device is ≤ the lowest level of other parts of the primary rain pipe.

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