A distributed hierarchical interception and diversion control method and system for urban drainage pipe network

Abstract

The application provides a distributed hierarchical interception and diversion control method and system for urban drainage pipe networks, comprising: when the inflow Q i of a downstream zero-level point i in a controlled catchment area is less than a preset control limit Q ilim of the point at any time t, primary control is performed; when the inflow Q i of the downstream zero-level point i in the controlled catchment area is greater than or equal to the preset control limit Q ilim of the point and less than the maximum value Q imax of the processing capacity of the point at any time t, secondary control is performed; and until the inflow Q i of the zero-level point i is reduced by a preset proportion, the primary control is performed. According to the principle of maximizing the total amount of pollutants, the key nodes of the urban rainwater and sewage pipe networks are subjected to distributed hierarchical interception and diversion intelligent control, the effects of sewage and rainwater and sewage diversion are realized by taking flow as a constraint and water quality as a core, and the distributed hierarchical efficient diversion of the drainage system at all levels of pipe networks is realized.

Description

Technical Field

[0001] This invention relates to the fields of comprehensive urban water environment management, quality improvement and efficiency enhancement of urban drainage systems and operation management, and in particular to a distributed hierarchical interception and diversion control method and system for urban drainage pipe networks. Background Technology

[0002] The development and evolution of urban drainage systems has gone through several stages. First, there was the interception and transformation of combined sewer systems. Second, there was the large-scale interception and drainage model along rivers and lakes, gradually developing in response to pollution control in lakes and rivers such as Dianchi, Erhai, and Taihu. Third, some cities further promoted rainwater and sewage separation, clean water and sewage separation, or source control projects for pipeline network improvement. In recent years, with the promulgation of the "Water Ten Measures" and the advancement of black and odorous water body treatment, increasing the concentration of influent sewage, improving plant and network efficiency, and strengthening urban drainage and flood control safety have become important aspects of urban water environment management. Drainage pipelines, as important carriers of sewage collection and treatment systems and urban drainage and flood control systems, face the dual pressure of improving plant and network efficiency and drainage and flood control capabilities. Under the guidance of the national urban renewal path of "intensive, green, and low-carbon development," large-scale demolition and construction of urban underlying surfaces, including roads, will be restricted. Coupled with factors such as project investment and traffic impact, the model of large-scale rainwater and sewage separation transformation of urban pipeline networks will be unsustainable. Therefore, making full use of the existing drainage system's structural foundation, improving the quality of the pipe network through limited engineering modifications, and combining this with advancements in the Internet of Things and information systems to enhance plant and network efficiency and drainage and flood control capabilities will become an important direction for the development of drainage systems.

[0003] Traditional intercepting wells control the flow and scale of wastewater to the sewage treatment system by limiting the interception ratio. While this approach offers advantages such as low cost and minimal operation and maintenance requirements, its fixed interception ratio leads to insufficient integration between the interception capacity of traditional intercepting wells and the operational efficiency of the sewage treatment plant network. During rainy weather, traditional intercepting wells directly deliver a specific amount of mixed rainwater and sewage to the sewage treatment plant, resulting in overflows exceeding the plant's capacity and causing water pollution. During dry weather, traditional intercepting wells intercept even less mixed water than designed, neglecting the water quality and contributing significantly to low concentrations in the sewage treatment plant's influent. With the rise of water environment PPP projects in recent years, smart urban water environment platforms have become standard in water environment management projects, but the traditional intercepting well method is insufficient to support the intelligent operation of the plant network.

[0004] In recent years, smart diversion well products have gradually emerged. These products acquire water quality and quantity data through internal monitoring and sensing elements. Based on the monitoring data, they divert high-concentration wastewater to the wastewater system, while low-concentration mixed stormwater and wastewater are diverted to the stormwater system or discharged. This approach makes complete separation of sewage and stormwater in drainage networks possible, as well as the integrated smart operation of plant and network systems. Current smart diversion products only have a good foundation at the single-point control level of individual smart diversion wells. However, because drainage networks and systems are complex, with upstream and downstream networks influencing each other, a single-point closed-loop control model is insufficient to improve the efficiency of the entire system. Furthermore, focusing only on single-point control of the diversion well, while ignoring the operational capacity and status of upstream and downstream networks, can affect the overflow pollution control and drainage and flood control safety management of the entire drainage system. Currently, most smart diversion well products on the market focus on the closed-loop integration of functions within the well body, such as integrating rain gauges, water level gauges, water quality testing equipment, and control components. However, they neglect the control of the technology and efficiency of the smart control link. In other words, they ignore the response time of the sensing system's monitoring equipment for monitoring water quality and quantity, and the issuance and implementation of control commands also have a delay effect. This will cause the control strategies formulated by the smart diversion well to lose their timeliness, especially when it comes to drainage and flood control scheduling, which will bring significant potential safety hazards from urban flooding. Summary of the Invention

[0005] The purpose of this invention is to provide a distributed, hierarchical interception and diversion control method and system for urban drainage pipe networks, to solve the technical problem in existing technologies where smart diversion wells can only be controlled at a single point and cannot achieve control of the entire upstream and downstream drainage pipe network. The various technical effects of the preferred technical solutions provided by this invention are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a distributed, hierarchical interception and diversion control method for urban drainage pipe networks, comprising the following steps:

[0008] At any time t, when the inflow rate Q at downstream zero-level point i within the controlled catchment area... i Less than the preset control limit Q at this point ilim When this happens, Level 1 control is executed; wherein the Level 1 control includes controlling each level point upstream of the Level 0 point i to intercept the mixed wastewater into the Level 0 point i in a manner exceeding the preset concentration of its level;

[0009] At any time t, when the inflow rate Q at downstream zero-level point i within the controlled catchment area... i Greater than or equal to its preset control limit Q ilim And less than its maximum processing capacity Q imaxIf the flow rate is high, then secondary control is executed; wherein the secondary control includes sequentially determining the primary point ij with the highest flow rate in the area, the secondary point ijk with the highest flow rate among all secondary points covered by the primary point ij with the highest flow rate, and the tertiary point ijkm with the lowest pollutant concentration among all tertiary points covered by the secondary point ijk with the highest flow rate; controlling the sewage outlet in the tertiary point ijkm with the lowest pollutant concentration to close or limit the flow; and determining the influent flow rate Q of the zero-level point i. i Should the preset ratio be reduced? If so, then execute Level 1 control.

[0010] According to a preferred embodiment, the step of sequentially determining the primary monitoring point ij with the highest flow rate in the area, the secondary monitoring point ijk with the highest flow rate among all secondary monitoring points covered by the primary monitoring point ij with the highest flow rate, and the tertiary monitoring point ijkm with the lowest pollutant concentration among all tertiary monitoring points covered by the secondary monitoring point ijk with the highest flow rate, includes:

[0011] Determine at t-Δt ij Momentary Flow Q ij The largest first-order point ij; where Δt ij The time required to transport wastewater from primary point ij to zero point i;

[0012] Determine the secondary points covered by the primary point ij with the largest flow rate at t-Δt. ijk Momentary Flow Q ijk The largest secondary point ijk; where Δt ijk The time required to transport wastewater from secondary point ijk to zero point i;

[0013] Determine which of the tertiary points covered by the secondary point ijk with the largest flow rate is at t-Δt. ijkm Pollutant concentration C at any time ijkm The smallest tertiary point is ijkm, where Δt ijkm The time required to transport wastewater from point ijkm in the third-level point to point i in the zero-level point.

[0014] According to a preferred embodiment, the determination of the influent flow rate Q at the zero-level point i is described. i The steps for deciding whether to reduce the preset ratio also include:

[0015] When determining the inflow rate Q at the zero-level point i i If the preset ratio is not reduced, the secondary control will continue to be executed repeatedly until the inflow rate Q at the zero-level point i is reached. i Reduce the preset ratio.

[0016] According to a preferred embodiment, the water collection area refers to the service area of ​​a pumping station, a sewage treatment plant, or a sewage treatment station.

[0017] According to a preferred embodiment, the zero-level point i refers to the water flow convergence point located at the pump station or sewage treatment plant or sewage treatment station within the water collection area; the first-level point ij refers to the water flow convergence point on the main pipe connected to the pump station or sewage treatment plant or sewage treatment station and flowing towards the pump station or sewage treatment plant or sewage treatment station; the second-level point ijk refers to the water flow convergence point on the branch pipe connected to the main pipe and flowing towards the main pipe; and the third-level point ijkm refers to the water flow convergence point on the branch pipe connected to the branch pipe and flowing towards the branch pipe.

[0018] According to a preferred embodiment, at any time t, the inflow rate Q of the zero-level point i is... i Equal to all the first-order points ij at t-Δt ij The sum of flows at time t, where Δt ij The time required to transport wastewater from primary point ij to zero point i;

[0019] Alternatively, the inflow rate Q at the zero-level point i i Equal to all the second-order points ijk at t-Δt ijk The sum of flows at time t, where Δt ijk The time required to transport wastewater from secondary point ijk to zero point i;

[0020] Alternatively, the inflow rate Q at the zero-level point i i Equal to all the aforementioned third-level points ijkm at t-Δt ijkm The sum of flows at time t, where Δt ijkm The time required to transport wastewater from point ijkm in the third-level point to point i in the zero-level point.

[0021] The present invention also provides a distributed hierarchical interception and diversion control system for urban drainage pipe networks, wherein the control system is used to execute the aforementioned distributed hierarchical interception and diversion control method for urban drainage pipe networks.

[0022] The control system includes a hierarchical sensing system, a hierarchical control system, and a smart operation management system. The hierarchical sensing system is used to sense, store, and transmit water quality and quantity data and image / video data at each level of the water catchment area. The hierarchical control system is used to control the water flow direction and flow rate at each level of the water catchment area. The smart operation management system is used to receive the data transmitted by the hierarchical sensing system at each level of the water catchment area and control the opening and closing of the hierarchical control system.

[0023] According to a preferred embodiment, the hierarchical sensing system includes a water quantity data sensing element, a water quality data sensing element, an image and video sensing element, and a data storage and transmission element, wherein the water quantity data sensing element, the water quality data sensing element, and the image and video sensing element are distributed in the inspection wells at the zero-level, first-level, second-level, and third-level points in the water collection area.

[0024] The hierarchical control system includes flow and direction control devices distributed on structures at level 0, level 1, level 2, and level 3 points in the water catchment area.

[0025] According to a preferred embodiment, the water volume data sensing element includes a rain gauge, a flow meter, and a level gauge; the water quality data sensing element includes a TSS sensor, an Orp sensor, a TDS sensor, or a COD sensor; the image and video sensing element includes an image camera or a video camera; and the data storage and transmission element includes a local memory and a repeater, wherein the repeater is used to connect the local memory and the intelligent operation management system to transmit the sensed data to the intelligent operation management system.

[0026] The flow and direction control device includes a well module, structure, or control module for controlling the flow of interception and diversion in the drainage network. The well module includes a manhole, interception manhole, or overflow manhole. The structure includes a pump station or outlet. The control module includes an automatic or manual control device for controlling the flow direction and flow rate of water in the pipeline, such as a gate, valve, airbag, or pump, or a prefabricated non-control structure for stacking water or chute.

[0027] According to a preferred embodiment, the intelligent operation management system includes a data storage module, a data analysis module, a geographic information visualization module, and a control decision module. The data storage module is used to receive real-time sensing data transmitted by the hierarchical sensing system. The data analysis module is connected to the data storage module and is used to analyze the received real-time sensing data. The control decision module is used to issue control commands to the hierarchical control system based on the analysis results of the data analysis module. The geographic information visualization module is used to present the analysis results.

[0028] Based on the above technical solution, the distributed hierarchical interception and diversion control method and system for urban drainage pipe networks of the present invention have at least the following technical effects:

[0029] The distributed hierarchical interception and diversion control method for urban drainage pipe networks of the present invention takes the principle of maximizing the total amount of pollutant control, and performs distributed hierarchical interception and diversion intelligent control on key nodes of urban stormwater and sewage pipe networks. It achieves the effect of clearing sewage and separating stormwater and sewage with flow as constraint and water quality as the core, realizes efficient distributed hierarchical diversion of pipe networks at all levels of the drainage system, and realizes the systematic coordination of water security and water environment of urban drainage systems. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is an example diagram illustrating the layout of the hierarchical sensing system and hierarchical control system in the distributed hierarchical interception and diversion control system for urban drainage pipe networks of the present invention.

[0032] Figure 2 This is the control logic diagram of the first-level control in the distributed hierarchical interception and diversion control method for urban drainage pipe networks of the present invention;

[0033] Figure 3 This is the control logic diagram of the secondary control in the distributed hierarchical interception and diversion control method for urban drainage pipe networks of the present invention;

[0034] Figure 4 This is a block diagram of the distributed hierarchical interception and diversion control system for urban drainage pipe networks of the present invention.

[0035] In the diagram: 1-Combined sewer system area; 2-Separated sewer system area; 3-Mixed-flow sewer system area; 4-Pumping station; 5-Main pipe; 6-Branch pipe; 7-Branch pipe; 10-Hierarchical sensing system; 20-Hierarchical control system; 30-Intelligent operation management system; 101-Water quantity data sensing element; 102-Water quality data sensing element; 103-Image and video data sensing element; 104-Data storage and transmission element; 201-Flow and direction control device; 301-Data storage module; 302-Data analysis module; 303-Control decision module; 304-Geographic information visualization module. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0037] Example 1:

[0038] like Figure 2 and Figure 3 As shown, the present invention provides a distributed hierarchical interception and diversion control method for urban drainage pipe networks, comprising the following steps:

[0039] At any time t, when the inflow rate Q at downstream zero-level point i within the controlled catchment area... i Less than the preset control limit Q at this point ilim When this occurs, Level 1 control is implemented. Level 1 control includes controlling each upstream level point i to intercept mixed wastewater into Level 0 point i at a concentration exceeding its preset level; this maximizes the daily pollution load intercepted by the drainage system served by Level 0 point i, adhering to the TMDL principle. Specifically, considering the time delay effect of the control system and the safety performance of urban drainage, the flow rate at Level 0 point i must not exceed the preset control limit Q. ilim , where Q ilim <Q imax .

[0040] That is to say, such as Figure 2 As shown, for any time t, when the flow rate Q(i, t) at level zero point i is less than its preset control limit Q ilim At the same time, for control points distributed at each level, the control system should ensure that as many as possible exceed the preset concentration C for that level. imin C ijmin C ijkmin C ijkmmin The mixed wastewater is intercepted and discharged into the wastewater system, as shown in formula (1).

[0041] Formula (1):

[0042]

[0043] At any time t, when the inflow rate Q at downstream zero-level point i within the controlled catchment area... i Greater than or equal to its preset control limit Q ilim And less than its maximum processing capacity Q imaxIf the flow rate is high, then secondary control is executed; wherein the secondary control includes sequentially determining the primary point ij with the highest flow rate in the area, the secondary point ijk with the highest flow rate among all secondary points covered by the primary point ij with the highest flow rate, and the tertiary point ijkm with the lowest pollutant concentration among all tertiary points covered by the secondary point ijk with the highest flow rate; controlling the sewage outlet in the tertiary point ijkm with the lowest pollutant concentration to close or limit the flow; and determining the influent flow rate Q of the zero-level point i. i Should the preset ratio be reduced? If so, then execute level one control. When determining the inflow rate Q at level zero point i... i If the preset ratio is not reduced, the secondary control will continue to be executed repeatedly until the influent flow rate Q at the zero-level point i is reached. i Reduce the preset ratio.

[0044] Preferably, the steps of sequentially determining the primary monitoring point ij with the highest flow rate in the area, the secondary monitoring point ijk with the highest flow rate among all secondary monitoring points covered by the primary monitoring point ij with the highest flow rate, and the tertiary monitoring point ijkm with the lowest pollutant concentration among all tertiary monitoring points covered by the secondary monitoring point ijk with the highest flow rate include:

[0045] (1) Determine the value at t-Δt ij Momentary Flow Q ij The largest first-order point ij; where Δt ij The time required to transport wastewater from primary point ij to zero point i;

[0046] (2) Determine the secondary points covered by the primary point ij with the largest flow rate at t-Δt. ijk Momentary Flow Q ijk The largest secondary point ijk; where Δt ijk The time required to transport wastewater from secondary point ijk to zero point i;

[0047] (3) Determine the tertiary points covered by the secondary point ijk with the largest flow rate at t-Δt. ijkm Pollutant concentration C at any time ijkm The smallest tertiary point is ijkm, where Δt ijkm The time required to transport wastewater from point ijkm in the third-level point to point i in the zero-level point.

[0048] like Figure 3 As shown, this can be understood as: at time t, when Q ilim ≤Q(i,t) imax At this time, the secondary control is activated. The control system then begins a step-by-step search of the primary, secondary, and tertiary points within the catchment area, first locking onto points within the area at t-Δt. ij Momentary Flow Q​ij After identifying the primary point ij with the highest flow, search among all secondary points covered by that primary point ij for the flow within t-Δt. ijk Find the secondary point ijk with the highest flow at time t. After locking the secondary point ijk with the highest flow, search for the value at time t-Δt among all the tertiary points covered by that secondary point. ijkm The system identifies the tertiary point ijkm with the lowest pollutant concentration at any given time and, after locking onto this point, controls are applied to close the sewage outlet or restrict the flow at that point. Finally, it checks whether the flow rate at the zero-level point i has decreased to a preset ratio. If so, this round of control is complete, and primary control can be implemented for the entire system. Otherwise, the secondary control is repeated until the flow rate at the zero-level point i decreases to the preset ratio.

[0049] More preferably, the catchment area refers to the service area of ​​a pumping station, sewage treatment plant, or sewage treatment station. That is, in this application, a catchment area is controlled by a pumping station, sewage treatment plant, or sewage treatment station.

[0050] Furthermore, this application adopts a distributed hierarchical deployment principle to hierarchically deploy the water catchment areas to be controlled. Specifically, the zero-level point i refers to the water flow convergence point at the location of the pump station, sewage treatment plant, or sewage treatment station within the water catchment area; that is, the pump station, sewage treatment plant, or sewage treatment station within the water catchment area is the zero-level control unit of the control system for that water catchment area, which is the zero-level point i. For example... Figure 1 As shown, pump station 4 is the zero-level point S0.

[0051] The primary point ij refers to the water collection point on the main pipeline connected to and flowing towards the pumping station, sewage treatment plant, or wastewater treatment station. That is, the main pipeline connected to the pumping station, sewage treatment plant, or wastewater treatment station is the primary control unit of the water collection area control system, and the water collection point on this main pipeline is the primary point ij. For example... Figure 1 As shown, the main pipe 5 connected to the pump station 4 serves as a primary control unit, and has two water flow convergence points, namely primary point S. 01 and S 02 .

[0052] The secondary point ijk refers to the water collection point on the branch pipe connected to the main pipe and flowing towards it. That is, the branch pipe connected to the main pipe is the secondary control unit of the water collection area control system, and the water collection point of this branch pipe is the secondary point ijk. For example... Figure 1 As shown, the two main pipes 6 connected to the main pipe 5 serve as secondary control units. Each of the two main pipes 6 has two water flow convergence points, which are the secondary point S. 011 S012 and S 021 S 022 .

[0053] The aforementioned third-level point ijkm refers to the water convergence point on a branch pipe connected to the main pipe and flowing towards it. That is, the branch pipe connected to the main pipe is the third-level control unit of the water collection area control system, and the water convergence point of this branch pipe is the third-level point ijkm. For example... Figure 1 As shown, branch pipe 7, connected to main pipe 6, serves as a third-level control unit. The water flow convergence point on branch pipe 7 is a third-level point, such as: S 0111 S 0112 S 0113 S 0121 S 0122 S 0123 S 0211 and S 0221 Preferred, such as Figure 1 As shown, the areas that converge to the three-level control unit can be combined sewer area 1, separate sewer area 2, and mixed-flow sewer area 3. Among them, the main pipe 5 can be a sewage pipe, and the trunk pipe 6 can be a combined sewer pipe or a sewage pipe. Figure 1 The dashed lines in the diagram represent rainwater pipes.

[0054] Furthermore, since each distributed hierarchical point has a certain distance, the inflow rate Q at any time t is... i Equals all first-level points ij at t-Δt ij The sum of the flows at each moment is shown in formula (2), formula (2):

[0055]

[0056] Where Δt ij The time required to transport wastewater from primary point ij to primary point i is calculated as shown in formula (5), where S ij V represents the length of the drainage pipe network from point ij to point i. ij Let be the average flow velocity of the wastewater from point ij to point i.

[0057] Formula (5):

[0058]

[0059] Meanwhile, the inflow rate Q at level 0 point i i It equals all secondary points ijk at t-Δt ijk The sum of the flows at each moment is shown in formula (3), formula (3):

[0060]

[0061] Where Δt ijk The time required for wastewater from secondary point ijk to zero point i is shown in formula (6), S. ijk V represents the length of the drainage pipe network from point ijk to point i. ikj Let be the average flow velocity of the wastewater from point ijk to point i.

[0062] Formula (6):

[0063]

[0064] Meanwhile, the inflow rate Q at level 0 point i i It equals all tertiary points ijkm at t-Δt ijkm The sum of the flows at each moment is shown in formula (4), formula (4):

[0065]

[0066] Where, Δt ijkm The time required to transport wastewater from the third-level point ijkm to the zero-level point i is shown in formula (7); S ijkm V is the length of the drainage pipe network from point ijkm to point i. ijkm Let be the average flow velocity of the wastewater from point ijkm to point i.

[0067] Formula (7):

[0068]

[0069] Therefore, during Level 1 control, the influent flow rate at the Level 0 point does not exceed its preset control limit Q. ilim At this time, the control points at each level are controlled so that the mixed wastewater exceeding the preset concentration for each level is intercepted into the wastewater system, maximizing the total amount of pollutants intercepted by the drainage system. In secondary control, at time t, Q... ilim ≤Q(i,t) imax When determining the primary monitoring point ij with the highest flow rate in the area, the secondary monitoring point ijk with the highest flow rate among all secondary monitoring points covered by the primary monitoring point ij with the highest flow rate, and the tertiary monitoring point ijkm with the lowest pollutant concentration among all tertiary monitoring points covered by the secondary monitoring point ijk with the highest flow rate, it is necessary to determine the pollutant concentration at t-Δt. ij Momentary Flow Q ij After identifying the primary point ij with the highest flow, search among all secondary points covered by that primary point ij for the flow within t-Δt. ijk ​Find the secondary point ijk with the highest flow at time t. After locking the secondary point ijk with the highest flow, search for the value at time t-Δt among all the tertiary points covered by that secondary point. ijkm The system identifies the tertiary monitoring point ijkm with the lowest pollutant concentration at any given time, and after locking onto this point, it controls the sewage outlet at that point by closing it or limiting the flow. This effectively avoids system control errors caused by sensing system delays.

[0070] Example 2

[0071] This embodiment provides a distributed hierarchical interception and diversion control system for urban drainage pipe networks. The control system in this embodiment is used to execute the distributed hierarchical interception and diversion control method for urban drainage pipe networks in Embodiment 1.

[0072] like Figure 4 As shown, the control system includes a hierarchical sensing system 10, a hierarchical control system 20, and a smart operation management system 30. The hierarchical sensing system 10 senses, stores, and transmits water quality and quantity data, as well as image and video data, at each level of the catchment area. The hierarchical control system 20 controls the water flow direction and flow rate at each level of the catchment area. The smart operation management system 30 receives the data transmitted by the hierarchical sensing system 10 and controls the opening and closing of the hierarchical control system 20.

[0073] A further preferred embodiment of the hierarchical sensing system 10 includes a water quantity data sensing element 101, a water quality data sensing element 102, an image and video sensing element 103, and a data storage and transmission element 104. The water quantity data sensing element 101, the water quality data sensing element 102, and the image and video sensing element 103 are distributed in the inspection wells at the zero-level, first-level, second-level, and third-level points in the water collection area.

[0074] The graded control system 20 includes flow and direction control devices 201 distributed on structures at the zero-level, first-level, second-level, and third-level points in the water catchment area.

[0075] like Figure 1 As shown, in Figure 1 The example shown has a hierarchical sensing system 10 and a hierarchical control system 20 distributed at each location.

[0076] Preferably, in this embodiment, zero-level point i refers to the water flow convergence point located at the pump station, sewage treatment plant, or sewage treatment station within the catchment area; that is, the pump station, sewage treatment plant, or sewage treatment station within the catchment area is the zero-level control unit of the catchment area control system, i.e., zero-level point i. The first-level point ij refers to the water flow convergence point on the main pipe connected to and flowing towards the pump station, sewage treatment plant, or sewage treatment station. That is, the main pipe connected to the pump station, sewage treatment plant, or sewage treatment station is the first-level control unit of the catchment area control system, and the water flow convergence point on the main pipe is the first-level point ij. The second-level point ijk refers to the water flow convergence point on the branch pipe connected to and flowing towards the main pipe. That is, the branch pipe connected to the main pipe is the second-level control unit of the catchment area control system, and the water flow convergence point on the branch pipe is the second-level point ijk. The tertiary point ijkm refers to the water convergence point on the branch pipe connected to the main pipe and flowing into the main pipe. That is, the branch pipe connected to the main pipe is the tertiary control unit of the water collection area control system, and the water convergence point of this branch pipe is the tertiary point ijkm. Thus, within a water collection area, a distributed hierarchical deployment principle is followed to deploy the hierarchical sensing system and hierarchical control system, enabling timely acquisition of sensing data from each point and implementation of flow interception and diversion control at that point.

[0077] Further preferably, the water volume data sensing element 101 includes a rain gauge, a flow meter, and a level gauge, used to measure rainfall data, flow data, and level data at corresponding locations. The water quality data sensing element 102 includes a TSS sensor, an Orp sensor, a TDS sensor, or a COD sensor, used to obtain water quality data at corresponding locations. The image and video sensing element 103 includes an image camera or a video camera, used to obtain image or video data at corresponding locations. The data storage and transmission element 104 includes a local memory and a repeater, the repeater being used to connect the local memory and the intelligent operation management system to transmit the sensed data to the intelligent operation management system.

[0078] Preferably, the flow and direction control device 201 includes a well module, a structure, and a control module for flow control of interception and diversion in the drainage network. The well module includes a manhole, interception manhole, or overflow manhole; the structure includes a pumping station or outlet; and the control module includes an automatic or manual control device for controlling the flow direction and flow rate of water in the pipeline, such as a gate, valve, airbag, or pump, or a prefabricated non-control structure for cascading or chutes. The flow and direction control device of this application is arranged in the manholes or related structures of the stormwater and sewage drainage system according to the distributed hierarchical deployment principle of this application. Preferably, the flow and direction control device controls the opening and closing and the degree of opening of the control devices at corresponding levels according to the control instructions of the intelligent operation management system, so as to control the flow of water of a specific quality through a specific flow direction and control the transmission flow rate and duration. This effectively avoids system control errors caused by the delay effect of the sensing system by separating the sensing points from the control points.

[0079] Further preferably, the intelligent operation management system 30 includes a data storage module 301, a data analysis module 302, a geographic information visualization module 304, and a control decision module 303. The data storage module 301 receives real-time sensing data transmitted by the hierarchical sensing system 10. The data analysis module 302, connected to the data storage module 301, analyzes the received real-time sensing data. The control decision module 303 issues control commands to the hierarchical control system 20 based on the analysis results of the data analysis module 302. The geographic information visualization module 304 presents the analysis results. The intelligent operation management system is a unified sensing and control platform for the interception and diversion of urban stormwater and sewage pipe networks.

[0080] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A distributed, hierarchical interception and diversion control method for urban drainage pipe networks, characterized in that, Includes the following steps: At any time t, when the inflow rate Q at downstream zero-level point i within the controlled catchment area... i Less than the preset control limit Q at this point ilim When this happens, Level 1 control is executed; wherein the Level 1 control includes controlling each level point upstream of the Level 0 point i to intercept the mixed wastewater into the Level 0 point i in a manner exceeding the preset concentration of its level; At any time t, when the inflow rate Q at downstream zero-level point i within the controlled catchment area... i Greater than or equal to its preset control limit Q ilim And less than its maximum processing capacity Q imax If the flow rate is high, then secondary control is executed; wherein the secondary control includes sequentially determining the primary point ij with the highest flow rate in the area, the secondary point ijk with the highest flow rate among all secondary points covered by the primary point ij with the highest flow rate, and the tertiary point ijkm with the lowest pollutant concentration among all tertiary points covered by the secondary point ijk with the highest flow rate; controlling the sewage outlet in the tertiary point ijkm with the lowest pollutant concentration to close or limit the flow; and determining the influent flow rate Q of the zero-level point i. i Should the preset ratio be reduced? If so, then execute level one control. The steps of sequentially determining the primary monitoring point ij with the highest flow rate within the area, the secondary monitoring point ijk with the highest flow rate among all secondary monitoring points covered by the primary monitoring point ij with the highest flow rate, and the tertiary monitoring point ijkm with the lowest pollutant concentration among all tertiary monitoring points covered by the secondary monitoring point ijk with the highest flow rate, include: Determine at t- t ij Momentary Flow Q ij The largest first-level point ij; where t ij The time required to transport wastewater from primary point ij to zero point i; Determine which of the secondary points covered by the primary point ij with the highest flow rate is in t- t ijk Momentary Flow Q ijk The largest secondary point ijk; among which t ijk The time required to transport wastewater from secondary point ijk to zero point i; Determine which of the tertiary points covered by the secondary point ijk with the highest flow rate is in t- t ijkm Pollutant concentration C at any time ijkm The smallest tertiary point is ijkm, where, t ijkm The time required to transport wastewater from point ijkm in the third-level point to point i in the zero-level point.

2. The distributed hierarchical interception and diversion control method for urban drainage pipe networks according to claim 1, characterized in that, The determination of the inflow rate Q at the zero-level point i. i The steps for deciding whether to reduce the preset ratio also include: When determining the inflow rate Q at the zero-level point i i If the preset ratio is not reduced, the secondary control will continue to be executed repeatedly until the inflow rate Q at the zero-level point i is reached. i Reduce the preset ratio.

3. The distributed hierarchical interception and diversion control method for urban drainage pipe networks according to claim 1, characterized in that, The catchment area refers to the service area of ​​a pumping station, sewage treatment plant, or sewage treatment station.

4. The distributed hierarchical interception and diversion control method for urban drainage pipe networks according to claim 1, characterized in that, The zero-level point i refers to the water flow convergence point located at the pump station or sewage treatment plant within the water collection area; the first-level point ij refers to the water flow convergence point on the main pipe connected to the pump station or sewage treatment plant and flowing towards the pump station or sewage treatment plant; the second-level point ijk refers to the water flow convergence point on the branch pipe connected to the main pipe and flowing towards the main pipe; and the third-level point ijkm refers to the water flow convergence point on the branch pipe connected to the branch pipe and flowing towards the branch pipe.

5. The distributed hierarchical interception and diversion control method for urban drainage pipe networks according to claim 1, characterized in that, At any time t, the inflow rate Q at the zero-level point i is... i Equal to all the first-order points ij at t- t ij The sum of the flow at each moment, of which t ij The time required to transport wastewater from primary point ij to zero point i; Alternatively, the inflow rate Q at the zero-level point i i Equal to all the second-order points ijk at t- t ijk The sum of the flow at each moment, of which t ijk The time required to transport wastewater from secondary point ijk to zero point i; Alternatively, the inflow rate Q at the zero-level point i i Equal to all the aforementioned tertiary points ijkm at t- t ijkm The sum of the flow at each moment, of which, t ijkm The time required to transport wastewater from point ijkm in the third-level point to point i in the zero-level point.

6. A distributed, hierarchical interception and diversion control system for urban drainage pipe networks, characterized in that, The control system is used to execute the urban drainage network distributed hierarchical interception and diversion control method according to any one of claims 1 to 5. The control system includes a hierarchical sensing system (10), a hierarchical control system (20), and a smart operation management system (30). The hierarchical sensing system (10) is used to sense water quality and quantity data and image and video data of each level point in the water catchment area and store and transmit them. The hierarchical control system (20) is used to control the water flow direction and flow rate of each level point in the water catchment area. The smart operation management system (30) is used to receive the data transmitted by the hierarchical sensing system (10) of each level point and control the opening and closing of the hierarchical control system (20).

7. The distributed hierarchical interception and diversion control system for urban drainage pipe networks according to claim 6, characterized in that, The hierarchical sensing system (10) includes a water quantity data sensing element (101), a water quality data sensing element (102), an image and video sensing element (103), and a data storage and transmission element (104). The water quantity data sensing element (101), the water quality data sensing element (102), and the image and video sensing element (103) are distributed in the inspection wells of the zero-level, first-level, second-level, and third-level points in the water collection area. The hierarchical control system (20) includes flow and direction control devices (201) distributed on structures at the zero-level, first-level, second-level and third-level points in the water collection area.

8. The distributed hierarchical interception and diversion control system for urban drainage pipe networks according to claim 7, characterized in that, The water volume data sensing element (101) includes a rain gauge, a flow meter, and a level gauge; the water quality data sensing element (102) includes a TSS sensor, an Orp sensor, a TDS sensor, or a COD sensor; the image and video sensing element (103) includes an image camera or a video camera; the data storage and transmission element (104) includes a local memory and a repeater, the repeater being used to connect the local memory and the intelligent operation management system to transmit the sensing data to the intelligent operation management system; The flow and direction control device (201) includes a well module, structure or control module for flow control of interception and diversion in drainage pipe network, wherein the well module includes inspection well, interception well or overflow well, the structure includes pump station or outlet, and the control module includes automatic or manual control device of gate, valve, air bag or pump for controlling the flow direction and flow of water in the pipeline, or prefabricated non-control structure of stacked water or chute.

9. The distributed hierarchical interception and diversion control system for urban drainage pipe networks according to claim 7, characterized in that, The intelligent operation management system (30) includes a data storage module (301), a data analysis module (302), a geographic information visualization module (304), and a control decision module (303). The data storage module (301) is used to receive real-time sensing data transmitted by the hierarchical sensing system (10). The data analysis module (302) is connected to the data storage module (301) and is used to analyze the received real-time sensing data. The control decision module (303) is used to issue control commands to the hierarchical control system (20) based on the analysis results of the data analysis module (302). The geographic information visualization module (304) is used to present the analysis results.

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