A sewage interception and storage system and control method thereof

Abstract

The present invention relates to a sewage interception and regulation and storage system and a control method thereof. The sewage interception and regulation and storage system comprises a drainage pipe, a sewage pipe and at least one water-blocking device; the outlet of the drainage pipe is connected to the sewage pipe, and the drainage pipe is used to discharge domestic sewage and / or initial rainwater into the sewage pipe; the sewage pipe is provided with at least one water-blocking device. The sewage interception and regulation and storage system and regulation and storage method of the present invention can achieve the purpose of interception and regulation and storage only by relying on the liquid level difference formed on both sides of the water-blocking device, and maximizes the use of the space in the pipeline. More importantly, by providing a water-blocking device in the sewage pipe, the number of regulation and storage tanks provided along the sewage pipe can be reduced as much as possible, saving the occupied area of ​​land and also saving costs.

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 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 type of regulation and storage tank occupies a large area and has 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 built at 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 in a large area of ​​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 later 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 later rainwater. The average concentration of the pollution load of the collected rainwater is very low, which seriously affects 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, the system comprising a drainage pipe, a sewage pipe and at least one water blocking device;

[0006] The outlet of the drain pipe is connected to the sewage pipe, and the drain pipe is used to discharge domestic sewage and / or initial rainwater into the sewage pipe;

[0007] The sewage pipe is provided with at least one water-blocking device. When the water-blocking device is opened, the area of ​​the water-blocking device in the sewage pipe along the radial direction of the sewage pipe is smaller than the cross-sectional area of ​​the sewage pipe at the location of the water-blocking device, wherein the horizontal heights of the sewage pipe on both sides of the water-blocking device are different.

[0008] According to an embodiment of the present invention, the cross-sectional area of ​​the water blocking device in the sewage 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 sewage pipe.

[0009] According to an embodiment of the present invention, at least one water blocking device, such as one or more water blocking devices, may be provided on the sewage pipe. For example, when one water blocking device is provided, the water blocking device may divide the sewage pipe into a regulating storage area, for example, the sewage pipe on one side close to the sewage treatment device and the sewage pipe on the other side are respectively used as regulating storage areas; when multiple water blocking devices are provided, the multiple water blocking devices may be arranged at intervals along the sewage pipe to divide the sewage pipe into multiple regulating storage areas.

[0010] According to an embodiment of the present invention, the angle between the portion of the water blocking device in the sewage pipe and the central axis of its upstream pipe (indicating the inclination) can be set according to the slope of the sewage pipe laying 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.

[0011] 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.

[0012] According to the embodiment of the present invention, the water blocking device can form a storage space in the sewage pipe, thereby improving the treatment pressure of the sewage treatment device or sewage treatment plant caused by the slope drop.

[0013] 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 sewage pipe is adjustable, the term "opening" 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 "opening" includes starting the water blocking device so that the cross-sectional area of ​​the water blocking device in the sewage pipe is greater than 0 until it reaches any situation of 100% of the cross-sectional area that the water blocking device can reach in the sewage pipe, which can be adjusted according to the capacity of the required storage area. In the context of the present invention, the cross-sectional area of ​​the water blocking device in the sewage pipe can be defined as "opening", and the opening can be 0% to 100% of the maximum cross-sectional area that the water blocking device can reach in the sewage pipe, such as 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% or 100%.

[0014] 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 sewage pipe, the treatment capacity of the sewage treatment device or sewage treatment plant, and the slope of the pipeline. For example, the distance between two adjacent water blocking devices can be any suitable distance between 100-1500 meters.

[0015] According to an implementation plan of the present invention, when there are n water-blocking devices, n+1 regulating and storing areas can be formed, wherein the first regulating and storing area is formed by the water-blocking device near the most downstream end and the downstream pipeline, the n+1th regulating and storing area is formed by the water-blocking device near the most upstream end and the upstream pipeline, and the remaining regulating and storing areas are formed by two adjacent water-blocking devices.

[0016] According to the present invention, n is an integer greater than 1, for example, n can be any integer between 1-100000.

[0017] For ease of understanding and description, the present invention will number the water blocking device in sequence from the closest end (or "most downstream") to the sewage treatment device or sewage treatment plant to the farthest end (or "most upstream").

[0018] 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". As an example, the most downstream regulating and storage area is recorded as the first regulating and storage area, the regulating and storage area close to the most downstream is recorded as the second regulating and storage area, and so on, the most upstream regulating and storage area is recorded as the n+1th regulating and storage area, and the water blocking device at the upstream end of the first regulating and storage area is the first water blocking device, the water blocking device upstream of the second regulating and storage area is the second water blocking device, and so on, the water blocking device upstream of the nth regulating and storage area is the nth water blocking device, and each regulating and storage area is provided with a corresponding preset water level, the preset water level of the first regulating and storage area is the first preset water level, the preset water level of the second regulating and storage area is the second preset water level, and so on, the preset water level of the n+1th regulating and storage area is the n+1th preset water level.

[0019] 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.

[0020] According to a preferred embodiment of the present invention, a liquid level sensor and / or a flow sensor is further provided in one or more storage areas for detecting the liquid level height of the storage area and / or the flow rate passing through the water blocking device.

[0021] According to an embodiment of the present invention, the system also includes a diversion well and a rainwater pipe, the diversion well includes a water inlet, a first water outlet and a second water outlet, the water inlet is connected to the drain pipe, the first water outlet is connected to the sewage pipe, and the second water outlet is connected to the rainwater pipe.

[0022] According to an embodiment of the present invention, the diversion well is used to divert domestic sewage and rainwater containing dirt that needs to be treated flowing out of the drainage pipe to the sewage pipe, so as to divert rainwater that does not need to be treated to the rainwater pipe.

[0023] According to an embodiment of the present invention, the drain pipe may discharge domestic sewage and / or rainwater containing dirt that needs to be treated into the sewer pipe.

[0024] According to an embodiment of the present invention, the system does not include an additionally provided or modified primary rain pipe.

[0025] 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.

[0026] 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.

[0027] According to an embodiment of the present invention, the system further comprises a sewage interception pipe and / or a water outlet pipe, wherein when a diversion well is present, the first water outlet of the diversion well is connected to the sewage pipe via the sewage interception pipe, and the second water outlet is connected to the rainwater pipe via the water outlet pipe.

[0028] According to an embodiment of the present invention, one end of the sewage pipe may be connected to a sewage treatment device.

[0029] Preferably, when one end of the sewage pipe is connected to the sewage treatment device, the highest level of the sewage pipe between the sewage treatment device and the water blocking device is less than the highest level of the other parts of the sewage pipe. More preferably, when one end of the sewage pipe is connected to the sewage treatment device, the highest level of the sewage pipe between the sewage treatment device and the water blocking device is less than the lowest level of the other parts of the sewage pipe.

[0030] According to an embodiment of the present invention, the system also includes a controller, which is respectively connected to the liquid level sensor (and / or flow sensor) and the water-blocking device signal, and is used to receive the liquid level height and / or flow signal detected by the liquid level sensor, and control the cross-sectional area (or opening) of the water-blocking device upstream or downstream of the storage area where the water-blocking device is located in the sewage pipe according to the signal.

[0031] According to the embodiment of the present invention, the selection of the controller, signal transmission or reception, and the way the controller controls the water blocking device are all known in the art. The controller is, for example, a PLC controller known in the art.

[0032] 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.

[0033] The present invention also provides a pollution interception and storage method, which includes using the pollution interception and storage system.

[0034] 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 sewage pipe together with the pipe wall of the sewage pipe.

[0035] The pollution interception and storage method according to the present invention may include one or more steps selected from the following:

[0036] S1) On sunny days, at least one water blocking device is in a closed state, so that domestic sewage from the drainage pipe is intercepted and flowed to the sewage pipe and transported to the sewage treatment plant or sewage treatment device;

[0037] S2) When it rains, rainwater containing pollutants that need to be treated (such as initial rainwater or other rainwater containing pollutants to a level that requires treatment) is intercepted and sent to the sewage pipe and sent to the sewage treatment plant or sewage treatment device;

[0038] According to an exemplary embodiment of the present invention, the i-th regulating and storage area is optionally connected to other pipelines for conveying sewage; wherein, step S2) may include controlling the opening of the water blocking device so that the flow rate flowing into the sewage treatment plant or sewage treatment device through the water blocking device does not exceed the maximum processing capacity Q of the sewage treatment plant or sewage treatment device; it should be understood that controlling the opening of the water blocking device can adjust the water level in the regulating and storage area to achieve the purpose of controlling the above flow rate. For example, to achieve this purpose, the opening of the first water blocking device is controlled so that the flow rate flowing into the sewage treatment plant or sewage treatment device through the first water blocking device does not exceed the maximum processing capacity Q of the sewage treatment plant or sewage treatment device; when the water level in the i-th regulating and storage area reaches the preset maximum water level Hi of the regulating and storage area, the opening of the i-th water blocking device is increased, or when the water level in the i-th regulating and storage area is lower than Hi, the opening of the i-th water blocking device is reduced, wherein n≥i≥2, n is the total number of water blocking devices;

[0039] According to an exemplary embodiment of the present invention, Hi can be further set to an interval range value [Hi min ,Hi max ], when the water level in the i-th storage area reaches Hi max , increase the opening of the i-th water blocking device, or when the water level in the i-th storage area is lower than Hi min When , the opening of the i-th water blocking device is reduced;

[0040] According to an exemplary embodiment of the present invention, the i-th regulating and storage area can be further connected to other pipelines for conveying sewage. In the context of the present invention, the other pipelines for conveying sewage are also referred to as "sewage branches". For example, in step S2), the maximum treatment capacity of the sewage treatment plant or sewage treatment device is Q, the flow rate through the i-th water blocking device is Qi, the total amount of sewage input to the sewage branch connected to the i-th regulating and storage area is Zi, and the maximum flow threshold of each water blocking device is Fi, where n≥i≥1, n is the total number of water blocking devices; the condition is that the sum of the maximum flow threshold Fi of the i-th water blocking device and the flow rate of sewage input from the sewage branch from the first regulating and storage area to the i-th regulating and storage area is not greater than Q, that is, Fi+(Z1+Z2+…+Zi)≤Q. It should be understood that when the flow rate through a certain water blocking device is less than its maximum flow threshold Fi, the opening of the water blocking device can be reduced; when the detected flow rate is greater than the corresponding flow threshold Fi, the opening of the water blocking device can be increased to adjust Qi.

[0041] Among them, Fi can be further set to an interval range value [Fi min ,Fi max ], when the flow rate through the i-th water blocking device is greater than or equal to Fi max , increase the opening of the i-th water blocking device, or when the flow rate of the i-th water blocking device is less than or equal to Fi min , reduce the opening of the i-th water-blocking device.

[0042] In this application, the term "reach" can be understood as greater than or equal to, for example, when the water level in the i-th storage area reaches Hi max , which can be understood as when the water level in the i-th storage area is greater than or equal to Hi max The term "lower than" can be understood as less than or equal to, for example, when the flow rate of the i-th water blocking device is lower than Fi min , it can be understood that when the flow rate of the i-th water blocking device is less than or equal to Fi min .

[0043] Beneficial Effects

[0044] The water body regulating and storage device, sewage interception and regulation and storage system and regulation and storage method of the present invention use the "pipeline regulation and storage" method, which can achieve the purpose of interception and regulation by relying only on the liquid level difference formed on both sides of the water blocking device, thereby improving many problems in the existing regulation and storage methods. The inventor unexpectedly found that the "pipeline regulation and storage" method maximizes the use of the space in the pipeline. More importantly, after the water blocking device is set in the pipeline, and the liquid level sensor and flow sensor are set, not only the number of regulation and storage tanks set along the sewage pipe is reduced as much as possible, saving land occupation area and cost, but also the sewage treatment volume is controlled in a more accurate and stable manner.

[0045] 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 regulating and storage pipeline through the diversion well nearby, 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.

[0046] 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

[0047] Figure 1 It is a structural schematic diagram of the pollution interception and storage system of Embodiment 1-3 of the present invention;

[0048] Figure 2 It is a schematic diagram of the structure of the sewage pipe of the sewage interception and storage system of Examples 1-3 of the present invention. DETAILED DESCRIPTION

[0049] 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.

[0050] Example 1

[0051] The structure of the sewage interception and storage system in this embodiment is as follows: Figure 1 and Figure 2 The system comprises: a drainage pipe 5, a diversion well 4, a sewage pipe 1, a rainwater pipe 2, at least one water blocking device 3, a sewage interception pipe 6 and a water outlet pipe 7;

[0052] The diversion well 4 includes a water inlet, a first water outlet and a second 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, and the second water outlet is connected to the rainwater pipe 2 through the outlet pipe 7; one end of the sewage pipe 1 is connected to the sewage treatment plant 11.

[0053] The sewage pipe 1 is provided with a plurality of water blocking devices (not all of which are shown). When the water blocking device is activated, the area of ​​the water blocking device in the sewage pipe along the radial direction of the sewage pipe is smaller than the cross-sectional area of ​​the sewage pipe where the water blocking device is located. In addition, the sewage pipe is located at different levels on both sides of the water blocking device, and the plurality of water blocking devices can be arranged at intervals along the sewage pipe to divide the sewage pipe into a plurality of storage areas.

[0054] The diversion well is used to divert sewage and / or initial rainwater flowing from the drainage pipe to the sewage pipe, and to divert mid- and late-stage rainwater to the rainwater pipe; the drainage pipe is used to discharge domestic sewage and / or initial rainwater into the sewage pipe;

[0055] When one end of the sewage pipe is connected to a sewage treatment device or a sewage treatment plant, the highest level of the sewage pipe between the sewage treatment device and the water blocking device is ≤ the lowest level of the other parts of the sewage pipe.

[0056] Each of the regulating and storing areas is provided with a liquid level sensor and a flow sensor for detecting the liquid level height of the regulating and storing area and the sewage flow passing through each water blocking device.

[0057] The system also includes a PLC controller, which is respectively connected to the liquid level sensor, flow sensor and the water blocking device for receiving liquid level height and flow rate signals detected by the sensor, and controlling the opening of the water blocking device upstream or downstream of the storage area where the liquid level sensor or flow rate sensor is located according to the signal.

[0058] The water blocking device is selected from a bottom-opening weir gate, a bottom-opening gate, an eccentric blocking gate, a micro-blocking gate, an air bag, an air pillow or a pneumatic pipe clamp valve. The function of the water blocking device is to overcome the problem that the sewage pipe cannot be filled with water due to the slope drop, and is used to relieve the treatment pressure on the sewage treatment plant on rainy days.

[0059] The distance between two adjacent water blocking devices can be set according to the length of the sewage pipe, the treatment capacity of the sewage treatment plant, and the slope of the sewage pipe. For example, the distance between two adjacent water blocking devices is 100-1500 meters.

[0060] When there are n water-blocking devices, n+1 regulating and storing areas can be formed, wherein the first regulating and storing area is formed by the sewage treatment plant and the water-blocking device near the most downstream end, the last regulating and storing area is formed by the water-blocking device near the most upstream end and the upstream pipeline, and the remaining regulating and storing areas are formed by two adjacent water-blocking devices.

[0061] N water-blocking devices are arranged in the sewage pipe to divide the sewage pipe into n+1 regulating and storing areas, wherein, from the sewage treatment plant or the sewage treatment device upstream, there are the 1st regulating and storing area to the n+1th regulating and storing area, and the water-blocking device at the upstream end of the 1st regulating and storing area is the 1st water-blocking device, and so on, the water-blocking device at the upstream end of the nth regulating and storing area is the nth water-blocking device.

[0062] Example 2

[0063] The control method of the system in embodiment 1 is as follows: Figure 2As shown, the three water blocking devices form four regulating and storing areas in the sewage pipe, the first regulating and storing area is formed between the first water blocking device A-1 and the sewage treatment plant 11, the first preset water level is set in the first regulating and storing area, the second regulating and storing area is formed between the first water blocking device A-1 and the second water blocking device A-2, the second preset water level is set in the second regulating and storing area, the third regulating and storing area is formed between the second water blocking device A-2 and the third water blocking device A-3, the third preset water level is set in the third regulating and storing area, the fourth regulating and storing area is formed between the third water blocking device A-4 and the upstream pipeline, the fourth preset water level is set in the fourth regulating and storing area;

[0064] On sunny days, the three water-blocking devices are closed, and the sewage interception pipe of the diversion well is open. The domestic sewage from the drainage pipe is intercepted and sent to the sewage pipe and then to the sewage treatment plant for treatment.

[0065] When it rains, the sewage interception pipe of the diversion well is in the open state, and the diversion well is used to intercept the initial rainwater or seriously polluted rainwater in the catchment area to the sewage pipe, and then send it to the sewage treatment plant for treatment; the liquid level sensor in each storage area detects the liquid level height in the storage area, and the flow sensor detects the sewage flow through each water-blocking device and transmits the detected signal to the PLC controller. The controller compares the detection result with the preset threshold value, that is, determines whether the water-blocking device is opened or closed at this time, and then temporarily intercepts part of the water in the sewage pipe, and a certain amount of space is reserved in the sewage pipe for the rest of the water to be discharged to the sewage treatment plant. Specifically, the opening of the first water-blocking device is controlled so that the flow rate flowing into the sewage treatment plant or the sewage treatment device through the first water-blocking device does not exceed the maximum processing capacity Q of the sewage treatment plant or the sewage treatment device; when the water level in the i-th regulating and storage area reaches the preset maximum water level Hi of the regulating and storage area, the opening of the i-th water-blocking device is increased, or when the water level in the i-th regulating and storage area is lower than Hi, the opening of the i-th water-blocking device is reduced, where n≥i≥2; and n is the total number of water-blocking devices 3.

[0066] As an option, Hi can be further set to a range value [Hi min ,Hi max ], when the water level in the i-th storage area reaches Hi max , increase the opening of the i-th water blocking device, or when the water level in the i-th storage area is lower than Hi min , reduce the opening of the i-th water-blocking device.

[0067] Example 3

[0068] The system in Examples 1 and 2 is used, except that the i-th regulating and storage area can be further connected to other sewage pipes (sewage branches). During rainfall, the maximum processing capacity of the sewage treatment plant or sewage treatment device is Q, the flow rate through the i-th water blocking device is Qi, the total sewage input volume of the sewage branch connected to the i-th regulating and storage area is Zi, and the maximum flow threshold of each water blocking device is Fi, where n≥i≥1, n is the total number of water blocking devices 3; the condition is that the sum of the maximum flow threshold Fi of the i-th water blocking device and the flow rate of sewage input from the sewage branch from the 1st regulating and storage area to the i-th regulating and storage area is not greater than Q, that is, Fi+(Z1+Z2+…+Zi)≤Q. When the flow rate through a certain water blocking device is less than its maximum flow threshold Fi, the opening of the water blocking device can be reduced; when the detected flow rate is greater than the corresponding flow threshold Fi, the opening of the water blocking device can be increased to adjust Qi.

[0069] According to the above embodiment, during rainfall, especially the initial rainwater, it can be directly stored in the sewage pipe through the installation of multiple water-blocking devices, thus avoiding the need to reclaim additional land along the sewage pipe and set up a separate regulating storage tank, thereby reducing costs. At the same time, it can avoid the serious treatment pressure on the sewage treatment plant due to the need to treat a large amount of sewage in a short period of time.

[0070] 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, a sewage pipe and at least one water blocking device; The outlet of the drain pipe is connected to the sewage pipe, and the drain pipe is used to discharge domestic sewage and / or initial rainwater into the sewage pipe; One or more water blocking devices are arranged on the sewage pipe to divide the sewage pipe into regulating and storing areas. When the water blocking device is opened, the area of ​​the water blocking device in the sewage pipe along the radial direction of the sewage pipe is smaller than the cross-sectional area of ​​the sewage pipe at the location of the water blocking device, wherein: The sewage pipes are located at different levels on both sides of the water blocking device; The distance between two adjacent water blocking devices is set according to one or more factors including the length of the sewage pipe, the treatment capacity of the sewage treatment device or sewage treatment plant, and the slope of the pipeline; One end of the sewage pipe is connected to a sewage treatment plant or a sewage treatment device; n water blocking devices are arranged in the sewage pipe, and the sewage pipe is divided into n+1 regulating and storing areas, wherein the first regulating and storing area to the n+1 regulating and storing area are arranged upstream from the sewage treatment plant or the sewage treatment device, and the water blocking device at the upstream end of the first regulating and storing area is the first water blocking device, and so on, the water blocking device at the upstream end of the n regulating and storing area is the nth water blocking device, which includes one or more steps selected from the following: S1) On sunny days, at least one water blocking device is in a closed state, so that domestic sewage from the drainage pipe is intercepted and flowed to the sewage pipe and transported to the sewage treatment plant or sewage treatment device; S2) When it rains, the rainwater containing pollutants that need to be treated is intercepted and sent to the sewage pipe and then to the sewage treatment plant or sewage treatment device; Step S2 further includes one of the following steps: 1) The i-th regulating and storage area is optionally connected to other pipelines for conveying sewage; the opening of the first water blocking device is controlled so that the flow rate flowing into the sewage treatment plant or sewage treatment device through the first water blocking device does not exceed the maximum treatment capacity Q of the sewage treatment plant or sewage treatment device; when the water level in the i-th regulating and storage area reaches the preset maximum water level Hi of the regulating and storage area, the opening of the i-th water blocking device is increased, or when the water level in the i-th regulating and storage area is lower than Hi, the opening of the i-th water blocking device is reduced, wherein n≥i≥2; Hi is further set to the interval range value [Hi min ,Hi max ], when the water level in the i-th storage area is greater than or equal to Hi max , increase the opening of the i-th water blocking device, or when the water level in the i-th storage area is less than or equal to Hi min When , the opening of the i-th water blocking device is reduced; or 2) The ith storage area is connected to other sewage pipelines called "sewage branches", the maximum treatment capacity of the sewage treatment plant or sewage treatment device is Q, the flow rate through the ith water blocking device is Qi, the flow rate of sewage input from the sewage branch connected to the ith storage area is Zi, and the maximum flow threshold of each water blocking device is Fi, where n≥i≥1, and n is the total number of water blocking devices; the condition is that the sum of the maximum flow threshold Fi of the ith water blocking device and the flow rate of sewage input from the sewage branch from the 1st storage area to the ith storage area is not greater than Q, that is, Fi+(Z1+Z2+…+Zi)≤Q; Fi can be further set to an interval range value [Fi min ,Fi max ], when the flow rate through the i-th water blocking device is greater than or equal to Fi max , increase the opening of the i-th water blocking device, or when the flow rate of the i-th water blocking device is less than or equal to Fi min , reduce the opening of the i-th water-blocking device.

2. The sewage interception and storage method as claimed in claim 1, wherein the cross-sectional area of ​​the water blocking device in the sewage pipe is adjusted by controlling the height, width, inclination and / or thickness of the water blocking device extending in the sewage pipe.

3. The method for intercepting and regulating pollution as described in 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-impedance gate, an air bag, an air pillow or a pneumatic pipe clamp valve.

4. The pollution interception and storage method as described in claim 1, wherein a liquid level sensor and / or a flow sensor is also provided in one or more storage areas.

5. The sewage interception and storage method according to any one of claims 1 to 4, wherein the system further comprises a diversion well and a rainwater pipe, the diversion well comprises a water inlet, a first water outlet and a second water outlet, the water inlet is connected to a drain pipe, the first water outlet is connected to a sewage pipe, and the second water outlet is connected to a rainwater pipe.

6. The sewage interception and storage method as described in claim 5, wherein the system further comprises a sewage interception pipe and / or a water outlet pipe, wherein when a diversion well exists, the first water outlet of the diversion well is connected to the sewage pipe through the sewage interception pipe, and the second water outlet is connected to the rainwater pipe through the water outlet pipe.

7. The sewage interception and storage method as claimed in claim 1, wherein the highest level of the sewage pipe located between the sewage treatment plant or sewage treatment device and the water blocking device is less than the highest level of the sewage pipe in other parts.

8. The sewage interception and storage method as described in claim 1, wherein when one end of the sewage pipe is connected to the sewage treatment device, the highest horizontal height of the sewage pipe located between the sewage treatment plant or the sewage treatment device and the water blocking device is ≤ the lowest horizontal height of other parts of the sewage pipe.

9. The method for intercepting and regulating pollution according to any one of claims 1 to 4, wherein the system further comprises a controller, and the controller is respectively connected to the water blocking device, the liquid level sensor and / or the flow sensor signal.

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