Overflow pollution control method and system

Abstract

The invention discloses an overflow pollution control method and system. The method comprises the following steps that firstly, water volume data and water quality data of all sewage branch pipes are collected, water volume data and water quality data of all sewage secondary main pipes located on the downstream portions of the sewage branch pipes are collected, and water volume data and water quality data of main pipes located on the downstream portions of the sewage secondary main pipes are collected; then, whether the running state of the current pipe network system is abnormal or not is judged based on the water volume data of all the sewage branch pipes, all the sewage secondary main pipes and the main pipe and different levels of water quality data of upstream and downstream communication; if the running state of the current pipe network system is abnormal, further determining an early warning type and an abnormal source; and finally, allocating the water quantity of the sewage treatment plant based on the early warning type of the current pipe network system. According to the method and the system, the abnormal monitoring point position can be positioned more accurately, and the water volume allocation of the sewage treatment plant is realized in time based on the early warning type and the abnormal source, so that the overflow load is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to an overflow pollution control method and system. Background Art

[0002] The essence of the "overflow pollution" problem is that clean water such as rainwater, river and lake water, and groundwater enter the urban sewage collection pipe network system and flow to the urban sewage treatment plant. Because it exceeds the original design capacity, the excess clean water and sewage mixed water overflow into the natural environment, causing pollution. At present, the main way to solve this problem is through engineering transformation at the source, process, and end, that is, diversion transformation at the source (residential areas, schools, shopping malls, etc.), diversion transformation and leakage repair of the process (pipeline network), expansion of the sewage treatment plant at the end or plugging of the overflow point, etc. At the specific implementation level, the existing technology involves a wide range, high capital investment, and many coordinating departments. It is difficult to truly achieve system governance, and it can often only "treat the symptoms instead of the root cause."

[0003] The existing patent CN111285546B discloses a storage and purification system and method for controlling overflow pollution of combined rainwater and sewage. The scheme arranges inlets connected to overflow, storage, purification and other treatment facilities at different heights on the water inlet corridor to treat combined rainwater and sewage sewage under different weather conditions such as sunny days, light rain days, moderate rain days, heavy rain days, and rainstorm days in gradients. The main contents include: the water inlet of the sewage pump station, the water inlet of the storage and sedimentation tank, the water inlet of the water storage type ecological filter and the emergency overflow port with increasing heights on the water inlet corridor, and the clarification overflow port of the storage and sedimentation tank connected to the water storage type ecological filter tank, so as to form a gradient line for graded treatment according to the amount of rainfall. Gradient routes include: no rain or light rainfall routes: water inlet corridors, sewage pumping stations and sewage treatment plants; medium rainfall routes: water inlet corridors, regulating sedimentation tanks and sewage treatment plants; long-term continuous medium rain routes: water inlet corridors, regulating sedimentation tanks, water storage ecological filters and natural water bodies; heavy rainfall routes: water inlet corridors, water storage ecological filters and natural water bodies; rainstorm routes: water inlet corridors, emergency overflow ports overflowing to natural water bodies; and the latter routes include all the previous routes. This plan focuses on the regulation of sewage treatment facilities and fails to systematically consider the system coordination relationship between sewage pipe networks and sewage treatment facilities.

[0004] The existing patent CN113112054B discloses a combined sewer overflow pollution reduction system and linkage and coordination method in high-density built-up areas. The system forms a full-process linkage and coordination smart water decision-making mechanism based on the three dimensions of the past, present and future, and controls each treatment unit in the combined sewer area through an automatic gate. The system includes a sewage pipe network system, a rainwater pipe network system, a combined sewer network system connected to the sewage pipe network system and the rainwater pipe network system, respectively, an urban purification water plant system and an urban CSO storage tank and enhanced treatment system connected to the combined sewer network system, respectively, and a multi-dimensional decision-making smart water platform for making decisions. This solution is mainly used to solve the problem of decision lag in the existing treatment system, focusing on the generated decision situation, and does not explain the process of using data to analyze and calculate the decision.

[0005] Based on the above technical problems, the present invention is hereby proposed. Summary of the invention

[0006] Based on the above technical problems, the present invention proposes an overflow pollution control method and system to solve the problems in the prior art that water volume cannot be dynamically allocated based on operating data, sewage treatment efficiency is low, and overflow risk is high.

[0007] To achieve the above objectives, the present invention proposes an overflow pollution control method.

[0008] A method for controlling overflow pollution, comprising:

[0009] Collect water quantity and quality data of each sewage branch pipe;

[0010] Collect water quantity and quality data of each sewage secondary trunk pipe located downstream of the sewage branch pipe;

[0011] Collect water quantity and quality data of the main pipe located downstream of the secondary sewage pipe;

[0012] Based on the water volume data of each sewage branch pipe, each sewage secondary trunk pipe and main trunk pipe, as well as the water quality data of different levels connected upstream and downstream, it is judged whether the operation status of the current pipe network system is abnormal;

[0013] If the current operation status of the pipe network system is abnormal, further determine the warning type and the source of the abnormality;

[0014] Based on the early warning type of the current pipe network system, the water volume of the sewage treatment plant is adjusted to reduce the overflow load.

[0015] Furthermore, based on the water volume data of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk pipe, and the water quality data of different levels connected upstream and downstream, it is judged whether the operation status of the pipe network system is abnormal, including:

[0016] Based on the water volume data of each sewage branch pipe, each sewage secondary trunk pipe and main trunk pipe, as well as the water quality data of different levels connected upstream and downstream, determine whether the water quality of the pipe network system is abnormal;

[0017] Determine whether the water volume in the pipe network system is abnormal based on the water volume data of the main pipe;

[0018] If the water quantity and / or water quality of the pipe network system is abnormal, the operating state of the pipe network system is abnormal.

[0019] Furthermore, the water volume data includes flow data and water level data. Based on the water volume data of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk pipe, and the water quality data of different levels connected upstream and downstream, it is judged whether the water quality of the pipe network system is abnormal, including:

[0020] Based on the flow data of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk pipe, the average flow of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk pipe is determined in turn;

[0021] Determine the average water quality concentration at each level based on the water quality data of different levels connected upstream and downstream;

[0022] Determine the average water quality concentration difference between adjacent stages connected upstream and downstream according to the average water quality concentration of each stage;

[0023] Determine whether the flow data, average flow, average water quality concentration of each level, and average water quality concentration difference between adjacent levels connected upstream and downstream of each sewage branch pipe, each sewage secondary trunk pipe and main trunk pipe meet the preset water quality status judgment conditions,

[0024] Among them, Q i,j It represents the flow data of the jth sewage branch pipe, secondary sewage main pipe and main pipe at the i-th level. It represents the average flow rate of the jth sewage branch pipe, secondary sewage main pipe and main pipe of the i-th level, They represent the average water quality concentrations at different levels respectively; represents the average length of the secondary sewage pipe, represents the average length of the sewage branch pipe, and n represents the average extended degradation coefficient of pollutants in the sewage pipe in the pipe network system;

[0025] If the water quality status determination conditions are not met, the water quality of the current pipe network system is abnormal.

[0026] Furthermore, judging whether the water volume of the pipe network system is abnormal based on the water volume data of the main pipe includes:

[0027] Determine whether the flow data of the main pipe meets the water state determination conditions,

[0028] in, It represents the volume of domestic sewage in the pipe network system under normal conditions, Q 主干管 represents the real-time flow in the current sewage trunk pipe, T represents the length of the warning time, Q 污水 Indicates the current lifting flow of the sewage treatment plant lifting pump, V max It indicates the maximum storage capacity of the pipe network system without overflow;

[0029] If the water quantity status determination condition is not met, the water quantity of the current pipe network system is abnormal.

[0030] Furthermore, if the current operation status of the pipe network system is abnormal, the warning type and the source of the abnormality are further determined, including:

[0031] Determine whether the water volume data and water quality data of each sewage branch pipe, each sewage secondary trunk pipe and main trunk pipe meet the first abnormal warning judgment condition,

[0032] If the first abnormal warning judgment condition is met, it is determined that the abnormal source of the current pipe network system is that the upstream sewage discharge at the corresponding point is abnormal, and there is illegal industrial sewage discharge and high-concentration sewage discharge;

[0033] The corresponding warning type is that the pollution load concentration of the sewage treatment plant downstream of this point will increase significantly, and the sewage treatment plant will issue a warning of meeting the treatment standards.

[0034] Furthermore, if the current operation status of the pipe network system is abnormal, the warning type and the source of the abnormality are further determined, including:

[0035] Determine whether the water volume data and water quality data of each sewage branch pipe, each sewage secondary trunk pipe and main trunk pipe meet the second abnormal warning judgment condition,

[0036] If the second abnormal warning judgment condition is met, it is determined that the abnormal source of the current pipe network system is that there is a lot of clean water entering the sewage pipe network upstream of the corresponding point, but there is no overflow risk for the time being;

[0037] The corresponding warning type is that the hydraulic load downstream of this point will increase significantly, and the sewage treatment plant will face certain hydraulic shocks.

[0038] Furthermore, if the current operation status of the pipe network system is abnormal, the warning type and the source of the abnormality are further determined, including:

[0039] Determine whether the water volume data and water quality data of each sewage branch pipe, each sewage secondary trunk pipe and main trunk pipe meet the third abnormal warning judgment condition,

[0040] If the third abnormal warning judgment condition is met, it is determined that the abnormal source of the current pipe network system is that a large amount of clean water upstream of the corresponding point enters the sewage pipe network, and the sewage volume is about to exceed the storage capacity of the pipe network system;

[0041] The corresponding warning type is that the hydraulic load downstream of this point will increase significantly, and there will be an overflow risk after time period T.

[0042] Furthermore, based on the warning type of the current pipe network system, the water volume of the sewage treatment plant is adjusted to reduce the overflow load, including:

[0043] If the warning type of the current pipe network system is that the pollution load of the sewage treatment plant downstream of the point will increase significantly and the sewage treatment plant has reached the standard warning, it will be reported to the competent department immediately;

[0044] If the warning type of the current pipe network system is that the hydraulic load downstream of the point will be significantly increased and the sewage treatment plant will face a certain hydraulic impact, the biochemical unit of the sewage treatment plant is adjusted to make the sewage treatment plant perform overload treatment until the warning is eliminated;

[0045] If the warning type of the current pipe network system is that the hydraulic load downstream of the point will increase significantly and there is a risk of overflow after the T time period, the sewage treatment plant will be overloaded, the sewage storage tank will be filled with water, and the bypass purification device will be filled with water until the warning is eliminated.

[0046] Based on the above technical solution, an overflow pollution control method of the present invention has at least the following beneficial effects:

[0047] 1. The present invention monitors and collects water volume data and water quality data of each sewage branch pipe, each sewage secondary trunk pipe, and main trunk pipe, and judges the operating status of the pipe network system and determines the warning type and abnormal source based on the water volume data and water quality data. This method can more accurately locate the abnormal monitoring point, and timely implement water allocation for the sewage treatment plant based on the warning type and the abnormal source, thereby reducing the overflow load.

[0048] 2. The present invention can quickly determine the water quality status of the current pipe network system as a whole by judging whether the water volume data, average water volume, average water quality concentration of each stage and average water quality concentration difference between adjacent stages connected upstream and downstream of each sewage branch pipe, each sewage secondary trunk pipe and main trunk meet the preset water quality status judgment conditions, so as to further determine its warning type and abnormal source, thereby improving the sewage treatment efficiency of the sewage treatment plant.

[0049] 3. The present invention determines whether the water volume data and water quality data of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk meet the preset warning judgment conditions, so as to quickly determine the abnormal source of the monitoring point in the pipe network system and the warning type that the downstream will face, so as to take corresponding treatment measures according to the warning type to reduce the risk of sewage overflow.

[0050] To achieve the above object, the present invention also provides an overflow pollution control system.

[0051] An overflow pollution control system, which is used to control overflow pollution according to the overflow pollution control method, comprises: a sewage pipe network system, a sewage pipe network monitoring device and a control device,

[0052] The sewage pipe network system is used to collect sewage and transmit it to the sewage treatment plant. The sewage pipe network system adopts a hierarchical topology structure, which includes drainage households, sewage branches, sewage secondary trunk pipes and sewage main pipes;

[0053] Sewage pipe network monitoring equipment is used to monitor target monitoring points distributed at various topological levels in the sewage pipe network system, obtain water quality data and water quantity data at the target monitoring points, and transmit the water quality data and water quantity data to the control equipment;

[0054] Control equipment is used to analyze the operating status of the sewage pipe network system based on water quality data and water quantity data, and to issue early warnings and adjust water volume when the sewage pipe network system operates abnormally, thereby achieving overflow pollution control.

[0055] Furthermore, it also includes: a sewage storage tank, which includes at least one water storage corridor to achieve temporary peak-shifting storage.

[0056] Furthermore, the water storage gallery includes a water inlet pipe, a diversion pipe and a drain pipe, and the drain pipe is connected to the water inlet of the sewage treatment plant.

[0057] Furthermore, it also includes: a bypass purification treatment device, which includes an inlet area, a treatment area and an outlet area, and the outlet area is connected to an independent drain outlet or is connected to a tailwater outlet of a sewage treatment plant.

[0058] Furthermore, it also includes: a water distribution device for adjusting the water volume between the sewage treatment plant, the sewage regulating tank and the bypass purification treatment device, and the water distribution device is connected to the water inlet of the sewage treatment plant, the sewage regulating tank and the bypass purification treatment device.

[0059] Furthermore, the water distribution device is also provided with an overflow port.

[0060] Based on the above technical solution, an overflow pollution control system of the present invention has at least the following beneficial effects:

[0061] 1. An overflow pollution control system of the present invention includes a sewage pipe network system, a sewage pipe network monitoring device and a control device. With the help of the hierarchical topological structure of the sewage pipe network system, the sewage pipe network monitoring device monitors the target monitoring points distributed on each topological level, and obtains the corresponding water quality and water quantity data. The operating status of the pipe network system is judged based on the water quantity data and water quality data, and the warning type and abnormal source are determined. The system can locate the abnormal monitoring point more accurately, and use the control device to timely realize the water allocation of the sewage treatment plant based on the warning type and the abnormal source, thereby reducing the overflow load.

[0062] 2. The control device in an overflow pollution control system of the present invention can quickly determine the water quality status of the current pipe network system as a whole by judging whether the water volume data, average water volume, average water quality concentration of each stage and average water quality concentration difference between adjacent stages connected upstream and downstream of each sewage branch pipe, each sewage secondary trunk pipe and main trunk meet the preset water quality status judgment conditions, so as to further determine its warning type and abnormal source, thereby improving the sewage treatment efficiency of the sewage treatment plant.

[0063] 3. The control device in an overflow pollution control system of the present invention judges whether the water volume data and water quality data of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk meet the preset early warning judgment conditions, so as to quickly determine the abnormal source of the monitoring point in the pipe network system and the type of early warning that the downstream will face, so as to take corresponding treatment measures according to the early warning type to reduce the risk of sewage overflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0065] Figure 1 A schematic diagram of the arrangement of a pipe network monitoring device in one embodiment of the present invention;

[0066] Figure 2 A flow chart of an overflow pollution control method according to an embodiment of the present invention;

[0067] Figure 3 A flowchart for determining whether the operating status of the current pipe network system is abnormal in one embodiment of the present invention;

[0068] Figure 4 A flow chart for determining whether the water quality of a pipe network system is abnormal in one embodiment of the present invention;

[0069] Figure 5 This is a flow chart of adjusting the water volume of a sewage treatment plant to reduce the overflow load according to abnormal warning in one embodiment of the present invention;

[0070] Figure 6 The figure is a schematic diagram of an overflow pollution control system according to an embodiment of the present invention.

[0071] The above drawings include the following reference numerals:

[0072] 100. Sewage pipe network system; 200. Sewage pipe network monitoring equipment; 300. Control equipment; 400. Sewage treatment plant; 500. Sewage storage tank; 501. Water inlet pipe; 502. Diversion pipe; 503. Drain pipe; 600. Bypass purification treatment device; 601. Water inlet area; 602. Treatment area; 603. Water outlet area; 700. Water distribution device. DETAILED DESCRIPTION

[0073] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0074] The present invention is further described in detail below in conjunction with specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed by the present invention.

[0075] Example

[0076] In order to solve the problems in the prior art that water volume cannot be dynamically allocated based on operating data, sewage treatment efficiency is low, and overflow risk is high, the present invention proposes an overflow pollution control method and system.

[0077] To achieve the above objectives, the present invention proposes an overflow pollution control method.

[0078] like Figure 1 The figure shows a schematic diagram of the arrangement of the pipe network monitoring equipment in one embodiment of the present invention. In this embodiment, pipe network monitoring equipment is pre-installed at key drainage households, important nodes of the pipe network, pumping stations, and the main water inlet pipes of the sewage treatment plant to monitor the water quantity and water quality in the pipe network system.

[0079] Specifically, the pipe network monitoring equipment is generally arranged in three levels: a. First-level arrangement, the pipe network monitoring equipment is arranged at the source plot and the sewage branch pipe where the source plot converges, that is, the sewage discharge of key drainage households is monitored. The layout needs to include typical communities (such as communities with high occupancy rates and regular residents' living activities), typical public buildings (such as schools, governments, libraries, etc.), typical commercial buildings (such as office buildings, shopping centers, shopping malls, etc.), and industrial production land (such as industrial enterprises, industrial parks, etc.) to reflect the sewage discharge rules of people living, working, and relaxing in the sewage treatment system. b. Second-level arrangement, the pipe network monitoring equipment is arranged at the sewage secondary trunk pipe or the corresponding pump station located downstream of the sewage branch pipe. Multiple sewage branches converge into the sewage secondary trunk pipe node. The sewage secondary trunk pipe node is monitored to reflect the characteristics of the sewage transfer process. c. Third-level arrangement, the pipe network monitoring equipment is arranged at the sewage main pipe, the lifting pump station on the main pipe, the position before the main pipe enters the sewage plant, etc., and monitoring is carried out along the sewage main pipe.

[0080] Combining the above layout principles with Figure 1 It can be seen that the sewage pipe consists of three levels, among which the first-level sewage pipe is provided with multiple sewage branch pipes, the second-level sewage pipe is provided with multiple sewage secondary pipes, and the third-level sewage pipe is provided with a sewage main pipe.

[0081] like Figure 2 A flow chart of an overflow pollution control method according to an embodiment of the present invention is shown in FIG. Figure 2 As shown, the method includes the following sub-steps:

[0082] S1, collect water quantity and quality data of each sewage branch pipe.

[0083] S2, collects water quantity data and water quality data of each sewage secondary main pipe located downstream of the sewage branch pipe.

[0084] S3, collects water quantity data and water quality data of the main pipe located downstream of the secondary sewage pipe.

[0085] The water volume data of each sewage branch pipe described in the above steps S1, S2, and S3 include flow and water level data, and the water quality data include conductivity and chemical oxygen demand COD. By monitoring and collecting the water volume data of each sewage branch pipe, each sewage secondary trunk pipe, and the main trunk pipe, it is easy to determine whether there is an overflow risk in the downstream sewage treatment plant; by monitoring and collecting the water quality data of each sewage branch pipe, each sewage secondary trunk pipe, and the main trunk pipe, it is easy to determine whether rainwater and groundwater have entered each monitoring point, and then quickly locate the abnormal monitoring point and take corresponding treatment measures.

[0086] S4, based on the water volume data of each sewage branch pipe, each sewage secondary trunk pipe and main trunk pipe, as well as the different levels of water quality data connected upstream and downstream, determine whether the operating status of the current pipe network system is abnormal.

[0087] The operating status of the pipe network system can be determined from two aspects: water quantity and water quality. Figure 3 As shown, step S4 mainly includes the following sub-steps S401 to S403.

[0088] S401, judging whether the water quality of the pipe network system is abnormal based on the water volume data of each sewage branch pipe, each sewage secondary trunk pipe and main trunk pipe, as well as the water quality data of different levels connected upstream and downstream.

[0089] like Figure 4 As shown, judging whether the water quality of the pipe network system is abnormal includes sub-steps S4011 to S4015. Figure 1 Taking the arrangement of the pipeline network monitoring equipment shown in the figure as an example, the details of each step are introduced.

[0090] S4011, based on the flow data of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk pipe, determine the average flow of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk pipe in turn.

[0091] The water volume data includes flow data and water level data. In this step, the flow data Q of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk pipe are used. i,j , determine the average flow of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk pipe in turn

[0092] S4012, determining the average water quality concentration of each level based on the water quality data of different levels connected upstream and downstream.

[0093] According to the determined average water quality concentration at each level It is convenient to determine the changes in water quality data at different levels connected upstream and downstream, such as Figure 1 The water quality changes of the first sewage branch pipe monitoring point 1.1 at the first level, the first sewage secondary trunk pipe monitoring point 2.1 at the second level and the sewage main pipe monitoring point 3.1 at the third level are monitored, so as to determine whether the water quality data of the pipe network system is normal based on the water quality changes.

[0094] S4013, determining the average water quality concentration difference between adjacent stages connected upstream and downstream based on the average water quality concentration of each stage.

[0095] This step is used to determine the average water quality concentration difference between each sewage branch pipe and the sewage secondary main pipe and the average water quality concentration difference between each secondary sewage pipe and the sewage main pipe

[0096] For example, the average water quality concentration difference between each sewage branch pipe and the sewage secondary main pipe is It can be understood as the average water quality concentration difference between the first level first sewage branch pipe monitoring point 1.1 and the second level first sewage secondary trunk pipe monitoring point 2.1; or the average water quality concentration difference between the first level second sewage branch pipe monitoring point 1.2 and the second level second sewage secondary trunk pipe monitoring point 2.2. The average water quality concentration difference between each sewage secondary trunk pipe and the sewage trunk pipe It can be understood as the average water quality concentration difference between the second-level secondary sewage trunk monitoring points 2.1, 2.2 to 2.n and the sewage trunk monitoring point 3.1.

[0097] S4014, determine whether the flow data, average flow, average water quality concentration of each stage, and average water quality concentration difference between adjacent stages connected upstream and downstream of each sewage branch pipe, each sewage secondary trunk pipe and main trunk pipe meet the preset water quality status judgment conditions.

[0098] Based on the flow data, average flow, average water quality concentration of each level and average water quality concentration difference between adjacent levels connected upstream and downstream of each sewage branch pipe, each sewage secondary trunk pipe and main trunk pipe determined in the above steps S4011 to S4013, determine whether the above data meets the preset water quality status judgment conditions: Among them, Q i,j It represents the flow data of the jth sewage branch pipe, secondary sewage main pipe and main pipe at the i-th level. It represents the average flow rate of the jth sewage branch pipe, secondary sewage main pipe and main pipe of the i-th level, Respectively represent the average water quality concentration of different levels. represents the average length of the secondary sewage pipe, It represents the average length of the sewage branch pipe, and n represents the average extended degradation coefficient of pollutants in the sewage pipe in the pipe network system.

[0099] It should be noted that when all the judgment formulas in the above-mentioned water quality status judgment conditions are met at the same time, the water quality of the current pipe network system is normal, that is, the ratio of the flow data of each sewage branch pipe, each sewage secondary trunk pipe and the main pipe to the average flow of each sewage branch pipe, each sewage secondary trunk pipe and the main pipe is less than 1.4, and the average water quality concentration of sewage flowing from the source through the sewage branch pipe to the sewage secondary trunk pipe to the main pipe decreases step by step, and the average water quality concentration difference between adjacent levels connected upstream and downstream is less than the degradable sewage concentration of the sewage secondary trunk pipe or sewage branch pipe.

[0100] S4015: If the water quality status determination condition is not met, the water quality of the current pipe network system is abnormal. That is, if one or more of the judgment formulas are not satisfied, it is determined that the water quality of the current pipe network system is abnormal.

[0101] S402: Determine whether the water volume in the pipe network system is abnormal based on the flow data of the main pipe.

[0102] The step S402 includes the following two sub-steps:

[0103] First, determine whether the flow data of the main pipeline meets the water state determination conditions.

[0104] The water level status determination conditions are: in, It represents the volume of domestic sewage in the pipe network system under normal conditions, Q 主干管 represents the real-time flow in the current sewage trunk pipe, T represents the length of the warning time, Q 污水 It represents the current lifting flow rate of the sewage treatment plant lifting pump (that is, the water flow rate that the lifting pump can pump per unit time), V max It indicates the maximum storage capacity of the pipe network system without overflow.

[0105] If the water status judgment conditions are met, it means that the actual water inlet flow of the current pipeline system does not exceed the maximum storage capacity of the pipeline system without overflow, and there is no overflow risk for the time being.

[0106] On the contrary, if the water quantity status determination condition is not met, the water quantity of the current pipe network system is abnormal.

[0107] S403: If the water quantity and / or water quality of the pipe network system is abnormal, the operation state of the pipe network system is abnormal.

[0108] If it is determined through S401 or S402 that one of the water quantity and water quality data of the pipe network system is abnormal, the operation status of the pipe network system is abnormal.

[0109] S5: If the current operation status of the pipe network system is abnormal, further determine the warning type and the source of the abnormality.

[0110] After determining that the operating state of the current pipe network system is abnormal, this embodiment determines the warning type and abnormal source of a certain monitoring point in the current pipe network system through three abnormal warning judgment conditions. Specifically, the process of determining the warning type and abnormal source of a certain monitoring point in the current pipe network system through the first abnormal warning judgment condition is as follows:

[0111] First, determine whether the water volume data and water quality data of each sewage branch pipe, each sewage secondary trunk pipe and main trunk pipe meet the first abnormal warning judgment condition. Among them, the judgment It can be understood that the water quality concentration at this monitoring point is much greater than the average water quality concentration at this monitoring point.

[0112] If the three judgment formulas in the above first abnormal warning judgment condition are met at the same time, it is determined that the abnormal source of the current pipe network system is that the upstream sewage discharge at the corresponding point is abnormal, and there is illegal industrial sewage discharge and high-concentration sewage discharge. The corresponding warning type is that the pollution load of the downstream sewage treatment plant of this point will increase significantly, and the sewage treatment plant treatment reaches the standard warning.

[0113] The process of determining the warning type and abnormal source of a monitoring point in the current pipe network system through the second abnormal warning judgment condition is as follows:

[0114] First, determine whether the water volume data and water quality data of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk pipe meet the second abnormal warning judgment condition.

[0115] If the second abnormal warning judgment condition is met, it can be understood that the flow rate at the current monitoring point exceeds the standard but does not exceed the maximum storage capacity of the pipe network system without overflow, and the water quality concentration is normal. It can be determined that the abnormal source of the current pipe network system is that there is a lot of clean water entering the sewage pipe network upstream of the corresponding point, but there is no overflow risk for the time being. The corresponding warning type is that the hydraulic load downstream of the point will increase significantly, and the sewage treatment plant will face a certain hydraulic shock.

[0116] The process of determining the warning type and abnormal source of a monitoring point in the current pipe network system through the third abnormal warning judgment condition is as follows:

[0117] First, determine whether the water volume data and water quality data of each sewage branch pipe, each sewage secondary trunk pipe and main trunk pipe meet the third abnormal warning judgment condition.

[0118] If the third abnormal warning judgment condition is met, it can be understood that the flow rate at the current monitoring point exceeds the standard and has exceeded the maximum storage capacity of the pipe network system without overflow, and the water quality concentration is normal. It can be determined that the abnormal source of the current pipe network system is that a large amount of clean water upstream of the corresponding point enters the sewage pipe network, and the sewage volume is about to exceed the storage capacity of the pipe network system. The corresponding warning type is that the hydraulic load downstream of the point will increase significantly, and there will be an overflow risk after the T time period.

[0119] S6, based on the warning type of the current pipe network system, adjust the water volume of the sewage treatment plant to reduce the overflow load.

[0120] like Figure 5 FIG. 1 is a flow chart showing how to adjust the water volume of a sewage treatment plant to reduce overflow load according to abnormal warning in one embodiment of the present invention. Figure 5It can be seen that when the early warning type of the pipe network system is determined to be an increase in the pollution load concentration downstream of the point, it is further judged whether the water volume data of the current monitoring point has the risk of overflow or excessive discharge. If there is a risk of overflow or excessive discharge, it is urgently reported to the ecological environment authority for processing and the early warning is eliminated. If the early warning type of the current pipe network system is that the hydraulic load downstream of the point will increase significantly and the sewage treatment plant will face a certain hydraulic shock, the biochemical unit of the sewage treatment plant will be adjusted to make the sewage treatment plant overload treatment until the early warning is eliminated. If the early warning type of the current pipe network system is that the hydraulic load downstream of the point will increase significantly and face the risk of overflow after the T time period, the three measures of overload operation of the sewage treatment plant, water inlet to the sewage storage tank and water inlet to the bypass purification device will be implemented in sequence until the early warning is eliminated.

[0121] Furthermore, when the preset overflow warning water level is reached and the water inlet to the regulating reservoir is turned on, the water level data of the monitoring point is still continuously monitored. If the water level at the current monitoring point does not reach the preset overflow warning water level, it is further determined whether the regulating reservoir is full of water; conversely, if the water level at the current monitoring point reaches the preset overflow warning water level, the bypass system processing is started. If after further determination of whether the regulating reservoir is full of water, it is found that the regulating reservoir is not full of water, the warning is eliminated; conversely, if the reservoir is full of water, the bypass system processing is turned on.

[0122] Similarly, when the bypass process is turned on, determine whether the water level at the current monitoring point has reached the preset overflow warning level. If it is determined that the water level has reached the preset overflow warning level, further determine whether the flow at the current monitoring point has an overflow or discharge risk. If there is an overflow or discharge risk, report it to the ecological environment authority urgently. Otherwise, eliminate the warning.

[0123] In summary, it can be seen from the above description that the above embodiment of an overflow pollution control method of the present invention achieves the following technical effects:

[0124] 1. The present invention monitors and collects water volume data and water quality data of each sewage branch pipe, each sewage secondary trunk pipe, and main trunk pipe, and judges the operating status of the pipe network system and determines the warning type and abnormal source based on the water volume data and water quality data. This method can more accurately locate the abnormal monitoring point, and timely implement water allocation for the sewage treatment plant based on the warning type and the abnormal source, thereby reducing the overflow load.

[0125] 2. The present invention can quickly determine the water quality status of the current pipe network system as a whole by judging whether the water volume data, average water volume, average water quality concentration of each stage and average water quality concentration difference between adjacent stages connected upstream and downstream of each sewage branch pipe, each sewage secondary trunk pipe and main trunk meet the preset water quality status judgment conditions, so as to further determine its warning type and abnormal source, thereby improving the sewage treatment efficiency of the sewage treatment plant.

[0126] 3. The present invention determines whether the water volume data and water quality data of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk meet the preset warning judgment conditions, so as to quickly determine the abnormal source of the monitoring point in the pipe network system and the warning type that the downstream will face, so as to take corresponding treatment measures according to the warning type to reduce the risk of sewage overflow.

[0127] To achieve the above object, the present invention also provides an overflow pollution control system.

[0128] like Figure 6 , a schematic diagram of an overflow pollution control system according to an embodiment of the present invention is shown. The overflow pollution control system is used to control overflow pollution according to the overflow pollution control method described above. The overflow pollution control system includes: a sewage pipe network system 100, a sewage pipe network monitoring device 200 and a control device 300. The sewage pipe network system 100 is used to collect sewage and transmit the sewage to a sewage treatment plant 400. The sewage pipe network system 100 adopts a hierarchical topological structure, which includes drainage households, sewage branch pipes, sewage secondary trunk pipes and sewage main trunk pipes; the sewage pipe network monitoring device 200 is used to monitor target monitoring points distributed at various topological levels in the sewage pipe network system 100, obtain water quality data and water quantity data of the target monitoring points, and transmit the water quality data and water quantity data to the control device 300; the control device 300 is used to analyze the operating status of the sewage pipe network system 100 according to the water quality data and water quantity data, and to issue an early warning and adjust the water quantity when the sewage pipe network system 100 operates abnormally, so as to achieve overflow pollution control.

[0129] The overflow pollution control system of this embodiment also includes: a sewage storage tank 500, a bypass purification treatment device 600 and a water distribution device 700. Specifically, the sewage storage tank 500 includes at least one water storage corridor to achieve temporary peak-shifting storage. Figure 6As shown, the water storage gallery includes an inlet pipe 501, a diversion pipe 502 and a vent pipe 503, and the vent pipe 503 is connected to the water inlet of the sewage treatment plant 400. The bypass purification treatment device 600 includes an inlet area 601, a treatment area 602 and a water outlet area 603, and the water outlet area 603 is connected to an independent drain outlet or connected to the tailwater outlet of the sewage treatment plant 400. The water distribution device 700 is used to allocate the water volume between the sewage treatment plant 400, the sewage storage tank 500 and the bypass purification treatment device 600. The water distribution device 700 is connected to the water inlet of the sewage treatment plant 400, the sewage storage tank 500 and the bypass purification treatment device 600. Furthermore, the water distribution device 700 is also provided with an overflow port.

[0130] It should be understood that an overflow pollution control system is consistent with the description of a corresponding overflow pollution control method embodiment, so it will not be repeated in this embodiment.

[0131] In summary, it can be seen from the above description that the above embodiment of an overflow pollution control system of the present invention achieves the following technical effects:

[0132] 1. An overflow pollution control system of the present invention includes a sewage pipe network system, a sewage pipe network monitoring device and a control device. With the help of the hierarchical topological structure of the sewage pipe network system, the sewage pipe network monitoring device monitors the target monitoring points distributed on each topological level, and obtains the corresponding water quality and water quantity data. The operating status of the pipe network system is judged based on the water quantity data and water quality data, and the warning type and abnormal source are determined. The system can locate the abnormal monitoring point more accurately, and use the control device to timely realize the water allocation of the sewage treatment plant based on the warning type and the abnormal source, thereby reducing the overflow load.

[0133] 2. The control device in an overflow pollution control system of the present invention can quickly determine the water quality status of the current pipe network system as a whole by judging whether the water volume data, average water volume, average water quality concentration of each stage and average water quality concentration difference between adjacent stages connected upstream and downstream of each sewage branch pipe, each sewage secondary trunk pipe and main trunk meet the preset water quality status judgment conditions, so as to further determine its warning type and abnormal source, thereby improving the sewage treatment efficiency of the sewage treatment plant.

[0134] 3. The control device in an overflow pollution control system of the present invention judges whether the water volume data and water quality data of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk meet the preset early warning judgment conditions, so as to quickly determine the abnormal source of the monitoring point in the pipe network system and the type of early warning that the downstream will face, so as to take corresponding treatment measures according to the early warning type to reduce the risk of sewage overflow.

[0135] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. 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.

[0136] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0137] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, which can be embodied in any computer-readable medium for use by an instruction execution system, apparatus or device (such as a computer-based system, a system including a processor or other system that can fetch instructions from an instruction execution system, apparatus or device and execute instructions), or used in combination with these instruction execution systems, apparatuses or devices.

[0138] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0139] It should be noted that, in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

Claims

1. A method for controlling overflow pollution, characterized in that: include: Collect water quantity and quality data of each sewage branch pipe; Collect water quantity and quality data of each sewage secondary trunk pipe located downstream of the sewage branch pipe; Collect water quantity and quality data of the main pipe located downstream of the secondary sewage pipe; Determine whether the operation status of the current pipe network system is abnormal based on the water volume data of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk pipe, and the water quality data of different levels connected upstream and downstream; If the operating state of the current pipe network system is abnormal, further determining the warning type and the source of the abnormality; Based on the warning type of the current pipe network system, the water volume of the sewage treatment plant is adjusted to reduce the overflow load.

2. The method according to claim 1, characterized in that: Based on the water volume data of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk pipe, and the water quality data of different levels connected upstream and downstream, it is judged whether the operation status of the pipe network system is abnormal, including: Determine whether the water quality of the pipe network system is abnormal based on the water volume data of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk pipe, and the water quality data of different levels connected upstream and downstream; Determining whether the water volume of the pipe network system is abnormal based on the water volume data of the main pipe; If the water quantity and / or water quality of the pipe network system is abnormal, the operation state of the pipe network system is abnormal.

3. The method according to claim 2, characterized in that The water volume data includes flow data and water level data. Based on the water volume data of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk pipe, and the water quality data of different levels connected upstream and downstream, it is judged whether the water quality of the pipe network system is abnormal, including: Based on the flow data of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk pipe, the average flow of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk pipe is determined in sequence; Determine the average water quality concentration of each level according to the water quality data of different levels connected upstream and downstream; determine the average water quality concentration difference between adjacent levels connected upstream and downstream according to the average water quality concentration of each level; Determine whether the flow data, the average flow, the average water quality concentration of each stage, and the average water quality concentration difference between adjacent stages connected upstream and downstream of the sewage branch pipes, the sewage secondary trunk pipes and the main trunk pipe meet the preset water quality status determination conditions, Among them, Q i,j It represents the flow data of the jth sewage branch pipe, secondary sewage main pipe and main pipe at the i-th level. It represents the average flow rate of the jth sewage branch pipe, secondary sewage main pipe and main pipe of the i-th level, They represent the average water quality concentrations at different levels respectively; represents the average length of the secondary sewage pipe, represents the average length of the sewage branch pipe, and n represents the average extended degradation coefficient of pollutants in the sewage pipe in the pipe network system; If the water quality status determination condition is not met, the water quality of the current pipe network system is abnormal.

4. The method according to claim 2, characterized in that Judging whether the water volume of the pipe network system is abnormal based on the water volume data of the main pipe includes: Determine whether the flow data of the main pipe meets the water state determination condition, in, It represents the volume of domestic sewage in the pipe network system under normal conditions, Q 主干管 represents the real-time flow in the current sewage trunk pipe, T represents the length of the warning time, Q 污水 Indicates the current lifting flow of the sewage treatment plant lifting pump, V max It indicates the maximum storage capacity of the pipe network system without overflow; If the water quantity status determination condition is not met, the water quantity of the current pipe network system is abnormal.

5. The method according to claim 3 or 4, characterized in that: If the current operation status of the pipe network system is abnormal, the warning type and the abnormal source are further determined, including: Determine whether the water volume data and the water quality data of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk pipe meet the first abnormal warning determination condition, If the first abnormal warning judgment condition is met, it is determined that the abnormal source of the current pipe network system is that the upstream sewage discharge at the corresponding point is abnormal, and there is illegal industrial sewage discharge and high-concentration sewage discharge; The corresponding warning type is that the pollution load of the sewage treatment plant downstream of this point will increase significantly, and the sewage treatment plant will issue a warning of meeting the treatment standards.

6. The method according to claim 5, characterized in that If the current operation state of the pipe network system is abnormal, further determining the warning type and the abnormal source, further comprising: Determine whether the water volume data and the water quality data of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk pipe meet the second abnormal warning determination condition, If the second abnormal warning judgment condition is met, it is determined that the abnormal source of the current pipe network system is that there is a lot of clean water entering the sewage pipe network upstream of the corresponding point, but there is no overflow risk for the time being; The corresponding warning type is that the hydraulic load downstream of this point will increase significantly, and the sewage treatment plant will face certain hydraulic shocks.

7. The method according to claim 6, characterized in that If the current operation state of the pipe network system is abnormal, further determining the warning type and the abnormal source, further comprising: Determine whether the water volume data and the water quality data of each sewage branch pipe, each sewage secondary trunk pipe and the main trunk pipe meet the third abnormal warning determination condition, If the third abnormal warning judgment condition is met, it is determined that the abnormal source of the current pipe network system is that a large amount of clean water upstream of the corresponding point enters the sewage pipe network, and the amount of sewage is about to exceed the storage capacity of the pipe network system; The corresponding warning type is that the hydraulic load downstream of this point will increase significantly, and there will be an overflow risk after time period T.

8. The method according to claim 6 or 7, characterized in that: Based on the warning type of the current pipe network system, the water volume of the sewage treatment plant is allocated to reduce the overflow load, including: If the warning type of the current pipe network system is that the pollution load of the sewage treatment plant downstream of the point will increase significantly and the sewage treatment plant has reached the standard warning, it will be reported to the competent department immediately; If the warning type of the current pipe network system is that the hydraulic load downstream of the point will be significantly increased and the sewage treatment plant will face a certain hydraulic impact, the biochemical unit of the sewage treatment plant is adjusted to make the sewage treatment plant perform overload treatment until the warning is eliminated; If the warning type of the current pipe network system is that the hydraulic load downstream of the point will increase significantly and there is a risk of overflow after the T time period, the sewage treatment plant will be overloaded, the sewage storage tank will be filled with water, and the bypass purification device will be filled with water until the warning is eliminated.

9. An overflow pollution control system, characterized in that: The overflow pollution control system is used to perform overflow pollution control according to the overflow pollution control method according to any one of claims 1 to 8, and the overflow pollution control system comprises: a sewage pipe network system (100), a sewage pipe network monitoring device (200) and a control device (300), The sewage pipe network system (100) is used to collect sewage and transmit the sewage to a sewage treatment plant (400), wherein the sewage pipe network system (100) adopts a hierarchical topological structure, wherein the hierarchical topological structure includes drainage households, sewage branch pipes, sewage secondary trunk pipes and sewage main trunk pipes; the sewage pipe network monitoring device (200) is used to monitor target monitoring points distributed at various topological levels in the sewage pipe network system (100), obtain water quality data and water quantity data of the target monitoring points, and transmit the water quality data and the water quantity data to the control device (300); The control device (300) is used to analyze the operating status of the sewage pipe network system (100) based on the water quality data and the water volume data, and to issue an early warning and adjust the water volume when the sewage pipe network system (100) operates abnormally, thereby achieving overflow pollution control.

10. The system according to claim 9, characterized in that Also includes: A sewage storage tank (500), wherein the sewage storage tank (500) comprises at least one water storage corridor to achieve temporary peak-shifting storage.

11. The system according to claim 10, characterized in that The water storage gallery comprises a water inlet pipe (501), a diversion pipe (502) and a drain pipe (503), and the drain pipe (503) is connected to the water inlet of the sewage treatment plant (400).

12. The system according to claim 9, characterized in that Also includes: Bypass The purification treatment device (600) comprises a water inlet area (601), a treatment area (602) and a water outlet area (603), and the water outlet area (603) is connected to an independent drain outlet or is connected to a tailwater outlet of the sewage treatment plant (400).

13. The system according to claim 12, characterized in that Also includes: A water distribution device (700) is used to distribute the water volume between the sewage treatment plant (400), the sewage regulating tank (500) and the bypass purification treatment device (600), and the water distribution device (700) is connected to the water inlets of the sewage treatment plant (400), the sewage regulating tank (500) and the bypass purification treatment device (600).

14. The system according to claim 13, characterized in that The water distribution device (700) is also provided with an overflow port.

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