Detection method and detection system for mixed rainwater and sewage

Abstract

The invention discloses a detection method and a detection system for rain-sewage mixed flow water, and belongs to the technical field of sewage mixed flow detection. The method comprises the steps that S1, original parameter detection equipment is installed in a source road section of to-be-detected liquid, original parameter values of the to-be-detected liquid are detected regularly, and the original parameter values of the to-be-detected liquid can also be manually and directly set; s2, real-time parameter detection equipment is installed in a to-be-detected liquid flowing section, and real-time parameter values of flowing liquid in the flowing pipeline are detected regularly; in the invention, the judgment result of the mixed flow value is subjected to multi-step judgment to output the final result, or when multiple recheck results are not uniform, manual recheck determination can be performed, the additional arrangement of a recheck program can effectively avoid the detection error and improve the result accuracy, the detection method and the detection system can efficiently and accurately check the mixed flow phenomenon, and the detection efficiency is improved. Environmental pollution caused by mixed flow is avoided, and control pressure is relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage mixed-flow detection, and more specifically, to a detection method and a detection system for rain-sewage mixed water. Background Art

[0002] Rain-sewage separation is an important urban drainage system, aiming to separately collect and discharge rainwater and sewage. This system uses separate pipelines to convey rainwater and sewage, thereby avoiding their mixing and ensuring that the water quality meets the corresponding national or local standards before being discharged into the river. Rain-sewage separation not only helps to protect the urban environment but also improves the utilization efficiency of water resources.

[0003] Rain-sewage separation is a fundamental solution to improving urban infrastructure, solving urban flood control and waterlogging, and eliminating black and odorous water bodies. However, in the existing rain-sewage separation transformation, the following problems still exist:

[0004] The misconnection of sewage pipelines into rainwater pipelines will cause river pollution;

[0005] The misconnection of rainwater pipelines into sewage pipelines will cause an increase in the water volume load of the sewage treatment plant;

[0006] The mixing of industrial wastewater without pretreatment into domestic sewage pipelines will affect the up-to-standard discharge of the sewage treatment plant;

[0007] Some factories even deliberately mix unqualified sewage into rainwater discharge pipelines or domestic sewage discharge pipelines to avoid sewage inspections;

[0008] To avoid sewage pollution to rivers and groundwater, facilitate rainwater collection and utilization, centralized management and discharge, reduce the impact of water volume on the sewage treatment plant, ensure the treatment efficiency of the sewage treatment plant, and further improve water quality, the present invention proposes a detection method and a detection system for rain-sewage mixed water to solve the above technical problems. Summary of the Invention

[0009] 1. Technical Problems to be Solved

[0010] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a detection method and a detection system for rain-sewage mixed water, aiming to solve the problems in the prior art that the misconnection of sewage pipelines into rainwater pipelines will cause river pollution; the misconnection of rainwater pipelines into sewage pipelines will cause an increase in the water volume load of the sewage treatment plant; the mixing of industrial wastewater without pretreatment into domestic sewage pipelines will affect the up-to-standard discharge of the sewage treatment plant; and some factories even deliberately mix unqualified sewage into rainwater discharge pipelines or domestic sewage discharge pipelines.

[0011] 2. Technical Solutions

[0012] To solve the above problems, the present invention adopts the following technical solutions:

[0013] A detection method for rain and sewage mixed flow water, comprising the following steps;

[0014] Step S1: The original parameter detection device is installed in the section of the source of the liquid to be detected, and the original parameter values of the liquid to be detected are regularly detected. The original parameter values of the liquid to be detected can also be directly set manually;

[0015] Step S2: The real-time parameter detection device is installed in the section where the liquid to be detected flows through, and the real-time parameter values of the flowing liquid in the flow pipeline are regularly detected;

[0016] Step S3: The detection parameters of the liquid to be detected include one or more of ammonia nitrogen concentration, temperature, and conductivity. Compare the original parameter values of the liquid to be detected with the real-time parameter values of the flowing section, and calculate the difference between the original parameter values and the real-time parameter values according to the comparison results. The differences in different results will show the following two situations:

[0017] (c) If the difference between the original parameter value and the real-time parameter value is within the set range, it is determined that no other liquid is mixed in the liquid to be detected;

[0018] (d) If the difference between the original parameter value and the real-time parameter value is greater than the set range, it is determined that other liquid is mixed in the liquid to be detected;

[0019] Step S4: When the difference between the original parameter value and the real-time parameter value is greater than the set range, that is, when the liquid parameter is abnormal and mixed flow occurs, when it is detected that there is mixed flow in the liquid, output and confirm the location of the corresponding detection device.

[0020] As a preferred solution of the present invention, the parameter detection position of the detection device is close to the central axis of the pipeline, that is, the position far from the conveying pipe wall.

[0021] As a preferred solution of the present invention, when the detection parameters of the liquid to be detected include ammonia nitrogen concentration, temperature, and conductivity, the specific calculation formula is as follows:

[0022] y = k 1 x 1 n1 + k 2 x 2 n2 + k 3 x 3 n3

[0023] In the formula: y is the mixed flow test value;

[0024] x 1 、x 2 、x 3They are the percentage changes in ammonia nitrogen concentration, temperature, and conductivity, respectively, which are the ratios of the real-time values of the corresponding parameters to the average values of the corresponding water quality.

[0025] k 1 、k 2 、k 3 They are the change coefficients of ammonia nitrogen, temperature, and conductivity, respectively.

[0026] n 1 、n 2 、n 3 They are the change influence factors of ammonia nitrogen, temperature, and conductivity, respectively.

[0027] When y exceeds the set range, it is judged as mixed flow.

[0028] Then, through the verification and improvement of the calculation of the mixed flow ratio, using the data of ammonia nitrogen, temperature, conductivity, etc. collected from hundreds of sampling points, machine algorithms are carried out to deduce the coefficients corresponding to each parameter, and finally the degree of mixed flow is judged. The specific calculation formula is as follows:

[0029] Y = aN b + cW d + eD f

[0030] In the formula: Y is the mixed flow ratio;

[0031] N, W, and D are the numerical values of ammonia nitrogen concentration, temperature, and conductivity indicators, respectively;

[0032] a, b are the change coefficients of ammonia nitrogen indicators;

[0033] c, d are the change coefficients of temperature indicators;

[0034] e, f are the change coefficients of conductivity indicators;

[0035] By setting the range of the mixed flow ratio, 0 ≤ Y < x 1 within is range one, judged as no mixed flow; x 1 ≤ Y < x 2 within is range two, judged as mild mixed flow; x 2 ≤ Y < x 3 within is range three, judged as severe mixed flow.

[0036] As a preferred solution of the present invention, the position for parameter detection is close to the center of the pipeline. For example, it can be at a distance of more than 20 mm from the pipe wall of the conveying pipeline, so as to avoid the influence of impurities adhered to the pipe wall on the parameter detection and obtain the detection parameters of the fluid.

[0037] As a preferred solution of the present invention, the detection parameters of the liquid to be detected can also be set for the detection of other parameters according to the inherent characteristics of the liquid.

[0038] As a preferred embodiment of the present invention, according to the comparison of parameter values before and after, if it is determined that there is a mixed flow in the liquid to be tested, the original detection of the liquid to be tested is started again at this time to obtain a new original parameter value. If the judgment results are consistent, it is determined as a mixed flow.

[0039] Since the original data corresponding to the source of the liquid to be tested is not updated in real time, but updated regularly, this can reduce the workload of the system and ensure the smooth operation of the system internal; when it is determined as a mixed flow through detection and comparison, there may be deviations in the previous original parameters, and the deviation causes the result data to be exactly near the critical value, which is prone to misjudgment; at this time, the former judgment can be used as a preliminary judgment to trigger the subsequent re-inspection procedure. In the re-inspection procedure, the updated detection parameters are used for comparison, and repeated calculations and judgments are performed to further improve the reliability of the results.

[0040] A detection system for rain and sewage mixed water, which is applied to the above-mentioned detection method for rain and sewage mixed water, includes a source water test module, a real-time test module, a water quality homogenization calculation module, a cycle timing module, a mixed flow calculation and analysis module, and a result output module. The source water test module is connected to the water quality homogenization calculation module, the water quality homogenization calculation module and the real-time test module are both connected to the mixed flow calculation and analysis module, the source water test module and the real-time test module are both connected to the cycle timing module, and the mixed flow calculation and analysis module is connected to the result output module;

[0041] The source water test module is used to detect the corresponding parameters of the liquid to be tested;

[0042] The real-time test module is used to detect the corresponding parameters of the middle section or the downstream section of the liquid to be tested;

[0043] The water quality homogenization calculation module is used to calculate the parameter average value of the source water quality according to multiple groups of data measured by the source water test module within a certain period of time;

[0044] The cycle timing module is used to calculate the time cycle, and different update cycles are set in advance for the source water test module and the real-time test module. For example, the parameter detection cycle of the source water test module is 30 - 90 days / time, and the parameter detection cycle of the real-time test module is 1 - 12 hours / time;

[0045] The mixed flow calculation and analysis module is used to calculate the mixed flow test value and determine whether the liquid to be detected has a mixed flow according to the set value;

[0046] The result output module is used to output the mixed flow test values corresponding to the real-time test module at each position.

[0047] As a preferred embodiment of the present invention, the detection system for rain and sewage mixed water further includes a GPS positioning module connected to the raw water test module and the real-time test module, and the GPS positioning module is also connected to the mixed flow calculation and analysis module.

[0048] The GPS positioning module is used to locate the specific positions of each of the raw water test module and the real-time test module, facilitating the corresponding raw water detection parameters and real-time detection parameters in different pipelines, so that the calculation results of the mixed flow calculation and analysis module correspond one by one to the detection modules at different positions in the real-time test module corresponding to the corresponding positions, facilitating the identification of the specific positions where the mixed flow occurs.

[0049] As a preferred embodiment of the present invention, the detection module includes an ammonia nitrogen detector, a water temperature detector, and a conductivity detector.

[0050] As a preferred embodiment of the present invention, the detection system for rain and sewage mixed water further includes a mixed flow re-inspection module connected to the mixed flow calculation and analysis module, the raw water test module, the real-time detection module, and the GPS positioning module; when the value output by the mixed flow calculation and analysis module is within the mixed flow range, the mixed flow re-inspection module intercepts this part of the data, and locks the raw water test module at the calibrated position and the real-time detection module in the same flow pipeline at the corresponding position through the GPS positioning module for instant data update, recalculating the updated mixed flow test value, and the result output module takes the calculation result of the updated data as the final output value.

[0051] As a preferred embodiment of the present invention, the mixed flow re-inspection module is connected to the cycle timing module. While controlling the update of the detection data, the mixed flow re-inspection module will simultaneously send a signal to the cycle timing module, so that the corresponding cycle start times of the raw water test module and the real-time test module at the corresponding positions are updated correspondingly.

[0052] When initially judged as mixed flow, even if the raw water test parameters of this part are updated and recalculated, the water quality average value of the corresponding liquid to be tested in the mixed flow calculation and analysis module has been updated. Therefore, the update cycle of the corresponding test value is recalculated at this time. After multiple cycles, the synchronous operation and synchronous calculation of the test modules can be disrupted, avoiding system jamming caused by excessive data synchronous operation and calculation.

[0053] As a preferred embodiment of the present invention, the detection system for rain and sewage mixed water further includes a display module, and the display module displays the detection status corresponding to each test module through a display screen and marks the mixed flow position. For example, the mixed flow area is marked with a red screen, and the non-mixed flow area is marked with green.

[0054] As a preferred embodiment of the present invention, the detection system for rain and sewage mixed water further includes a client and an alarm module connected to the result output module.

[0055] 3. Beneficial effects

[0056] Compared with the prior art, the advantages of the present invention are as follows:

[0057] (1) In this solution, the detection of flow parameters, the detection of original parameters, and the calculation and judgment of the mixed flow value are used to obtain the result of whether there is mixed flow, and the specific position of the mixed flow is checked according to the GPS positioning. The judgment result of the mixed flow value will go through multiple steps of judgment before the final result is output, or when the recheck results are inconsistent multiple times, manual recheck can be carried out to determine. The addition of the recheck procedure can effectively avoid detection errors, improve the accuracy of the results, and the detection method and detection system can efficiently and accurately detect the mixed flow phenomenon, avoiding environmental pollution caused by mixed flow and reducing the prevention and control pressure. Brief description of the drawings

[0058] Figure 1 It is a flowchart of a detection method for rain and sewage mixed water involved in the present invention;

[0059] Figure 2 It is a flowchart of a detection system for rain and sewage mixed water involved in the present invention. Detailed implementation manners

[0060] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0061] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0062] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0063] Example 1:

[0064] Please refer to Figure 1 , a detection method for rain and sewage mixed flow water, comprising the following steps;

[0065] Step S1: The original parameter detection device is installed in the section of the source of the liquid to be detected, and the original parameter values of the liquid to be detected are regularly detected, or the original parameter values of the liquid to be detected can be directly set manually;

[0066] Step S2: The real-time parameter detection device is installed in the section where the liquid to be detected flows through, and the real-time parameter values of the flowing liquid in the flowing pipeline are regularly detected;

[0067] Step S3: The detection parameters of the liquid to be detected include one or more of ammonia nitrogen concentration, temperature, and conductivity. Compare the original parameter values of the liquid to be detected with the real-time parameter values of the flowing section, and calculate the difference between the original parameter values and the real-time parameter values according to the comparison results. The differences in different results will show the following two situations:

[0068] (e) If the difference between the original parameter value and the real-time parameter value is within the set range, it is determined that no other liquid is mixed in the liquid to be detected;

[0069] (f) If the difference between the original parameter value and the real-time parameter value is greater than the set range, it is determined that other liquid is mixed in the liquid to be detected;

[0070] Step S4: When the difference between the original parameter value and the real-time parameter value is greater than the set range, that is, when the liquid parameter is abnormal and there is a mixed flow, when it is detected that there is a mixed flow in the liquid, output and confirm the location of the detection device corresponding to the mixed flow.

[0071] Further preferably: Among them, the detection parameters of the liquid to be detected include ammonia nitrogen concentration, temperature, and conductivity. The judgment formula for mixed flow detection is as follows:

[0072] y = k 1 x 1 n1 + k 2 x 2 n2 + k 3 x 3 n3

[0073] In the formula: y is the mixed flow test value;

[0074] x 1 、x 2 、x 3They are the percentage changes in ammonia nitrogen concentration, temperature, and conductivity index respectively, and the ratio of the real-time value of the corresponding parameter to the average water quality value is selected. Here, the average water quality value is the average of the detection data corresponding to the source of the liquid to be measured, and the average of the detection data is the average of the values obtained by the original parameter detection equipment through several detections of the source of the liquid to be measured;

[0075] k 1 、k 2 、k 3 They are the change coefficients of ammonia nitrogen, temperature, and conductivity index respectively;

[0076] n 1 、n 2 、n 3 They are the change influence factors of ammonia nitrogen, temperature, and conductivity index respectively;

[0077] When y exceeds the set range, it is judged as mixed flow.

[0078] According to the different liquids to be detected, the values of mixed flow and the judgment criteria are slightly different:

[0079] When rainwater mixes into sewage:

[0080] k 1 takes the value of 1.3, k 2 takes the value of 1.2, k 3 takes the value of 1.1;

[0081] n 1 takes the value of 0.3, n 2 takes the value of 0.5, n 3 takes the value of 0.7.

[0082] When sewage mixes into rainwater:

[0083] k 1 takes the value of 0.8, k 2 takes the value of 0.85, k 3 takes the value of 0.95;

[0084] n 1 takes the value of 0.4, n 2 takes the value of 0.6, n 3 takes the value of 0.8.

[0085] When industrial wastewater mixes into domestic sewage:

[0086] k 1 takes the value of 0.85, k 2 takes the value of 0.9, k 3 takes the value of 0.95;

[0087] n 1 takes the value of 0.5, n 2 takes the value of 0.7, n 3The value is 0.8.

[0088] If y is within the range of 2.9 - 3.1, it is determined that no drainage of different types is mixed in. If y is not within the range of 2.9 - 3.1, it is determined that drainage of different types is mixed in.

[0089] The measurement data is incorporated into the management server, providing a reliable reference basis for the later mixed - flow management.

[0090] Furthermore, through the verification and improvement of the mixed - flow ratio calculation, using the ammonia - nitrogen, temperature, and conductivity data collected from hundreds of sampling points, machine algorithms are performed to deduce the coefficients corresponding to each parameter, and finally the degree of mixed flow is judged. The specific calculation formula is as follows:

[0091] Y = aN b + cW d + eD f

[0092] In the formula: Y is the mixed - flow ratio;

[0093] N, W, and D are the numerical values of the ammonia - nitrogen concentration, temperature, and conductivity indicators respectively;

[0094] a, b are the change coefficients of the ammonia - nitrogen indicator;

[0095] c, d are the change coefficients of the temperature indicator;

[0096] e, f are the change coefficients of the conductivity indicator;

[0097] By setting the range of the mixed - flow ratio, 0 ≤ Y < x 1 within is Range 1, and it is determined that there is no mixed flow; x 1 ≤ Y < x 2 within is Range 2, and it is determined that there is mild mixed flow; x 2 ≤ Y < x 3 within is Range 3, and it is determined that there is severe mixed flow.

[0098] Example 2:

[0099] Based on Example 1:

[0100] Specifically, the parameter detection position of the detection device is close to the central axis of the pipeline. For example, it can be at a distance of more than 20 mm from the pipe wall of the conveying pipeline, so as to avoid the influence of impurities adhered to the pipe wall on the parameter detection and obtain the detection parameters of the fluid.

[0101] Specifically, the detection parameters of the liquid to be detected can also be set for the detection of other parameters according to the inherent characteristics of the liquid.

[0102] Specifically, after initially determining whether mixed flow occurs in the liquid to be tested, the original parameter value of the liquid to be tested is updated in time, and then a secondary determination is performed on the liquid to be tested. The secondary determination results have the following two situations;

[0103] (c) The second judgment is consistent with the first judgment result and is determined to be mixed flow;

[0104] (d) If the secondary judgment is inconsistent with the initial judgment, the relevant operator is notified to conduct a work inspection or to conduct multiple subsequent inspections and judgments;

[0105] If multiple subsequent judgments are consistent with the results of the initial judgment or the re-judgment, the abnormal judgment result is discarded.

[0106] Since the original data corresponding to the source of the liquid to be tested is not updated in real time but regularly, this can reduce the workload of the system and ensure the smooth operation of the system. When it is judged as a mixed flow after detection and comparison, there may be deviations in the original parameters, and the deviation causes the result data to be located exactly near the critical value, which is easy to cause misjudgment. At this time, the former judgment can be used as a preliminary judgment to trigger a subsequent re-inspection procedure. In the re-inspection procedure, the updated detection parameters are used as a comparison, and the calculation and judgment are repeated to further improve the reliability of the results. If the re-judgment is inconsistent with the initial judgment result, multiple subsequent judgments will be triggered (at this time, the original parameter values ​​of the water body to be tested can be updated multiple times), and the abnormal judgment result can be excluded when it is consistent with the initial judgment or the re-judgment result.

[0107] Embodiment 3:

[0108] Based on the methods disclosed in Examples 1 and 2, this embodiment relates to a detection system for mixed rainwater and sewage water. For details, please refer to Figure 2 , including a source water test module, a real-time test module, a water quality homogeneous calculation module, a cycle timing module, a mixed flow calculation and analysis module and a result output module, the source water test module is connected to the water quality homogeneous calculation module, the water quality homogeneous calculation module and the real-time test module are both connected to the mixed flow calculation and analysis module, the source water test module and the real-time test module are both connected to the cycle timing module, and the mixed flow calculation and analysis module is connected to the result output module;

[0109] The source water test module is used to detect the corresponding parameters of the liquid to be tested;

[0110] The real-time test module is used to detect the corresponding parameters of the middle section or downstream section of the liquid to be tested;

[0111] The water quality homogenization calculation module is used to calculate the average value of the source water quality parameters based on multiple sets of data measured by the source water testing module within a certain period of time;

[0112] The cycle timing module is used to calculate the time cycle and set different update cycles in advance for the source water test module and the real-time test module. For example, the parameter detection cycle of the source water test module is 30 or 60 or 80 days per time, and the parameter detection cycle of the real-time test module is 1 or 2 or 4 or 10 hours per time;

[0113] The mixed flow calculation and analysis module is used to calculate the mixed flow test value and judge whether the liquid to be detected is mixed according to the set value;

[0114] The result output module is used to output the mixed flow test values corresponding to the real-time test modules at each position.

[0115] The detection system for rain and sewage mixed water also includes a GPS positioning module connected to the source water test module and the real-time test module, and the GPS positioning module is also connected to the mixed flow calculation and analysis module.

[0116] The GPS positioning module is used to locate the specific positions of each source water test module and real-time test module, which is convenient for corresponding to the source water detection parameters and real-time detection parameters in different pipelines, so that the results calculated by the mixed flow calculation and analysis module are in one-to-one correspondence with the detection modules at different positions in the real-time test module corresponding to the corresponding positions, which is convenient for identifying the specific positions where the mixed flow occurs.

[0117] The detection module includes an ammonia nitrogen detector, a water temperature detector, and a conductivity detector.

[0118] The detection system for rain and sewage mixed water also includes a display module. The display module displays the detection status corresponding to each test module through a display screen and marks the mixed flow position. For example, the mixed flow place is marked with a red screen, and the non-mixed flow place is marked with green.

[0119] The detection system for rain and sewage mixed water also includes a mobile receiving device connected to the result output module, such as a mobile phone, an ipad, a computer, etc.

[0120] The detection system for rain and sewage mixed water also includes an alarm module connected to the result output module.

[0121] Example 4:

[0122] On the basis of Example 3, please refer to Figure 2 :

[0123] The detection system for rain and sewage mixed flow water further includes a mixed flow recheck module connected to the mixed flow calculation and analysis module, the source water test module, the real-time detection module, and the GPS positioning module; when the value output by the mixed flow calculation and analysis module is within the mixed flow range, the mixed flow recheck module intercepts this part of the data, and locks the source water test module at the calibrated position and the real-time detection module in the same flow pipeline at the corresponding position through the GPS positioning module for instant data update, recalculates the updated mixed flow test value, and the result output module takes the calculation result of the updated data as the final output value.

[0124] Specifically, the mixed flow recheck module is connected to the cycle timing module. While controlling the update of the detection data, the mixed flow recheck module will also send the signal to the cycle timing module at the same time, so that the corresponding cycle start times of the source water test module and the real-time test module at the corresponding position are updated correspondingly.

[0125] When it is initially judged as mixed flow, even if the source water test parameters of this part are updated and recalculated, the water quality average value of the liquid to be measured corresponding in the mixed flow calculation and analysis module has been updated. Therefore, the update cycle of the corresponding test value is recalculated at this time. After multiple cycles, the synchronous operation and synchronous calculation of the test modules can be disrupted, avoiding system jamming caused by the synchronous operation and calculation of too much data.

[0126] An artificial parameter input module can also be set up to increase the influence of manual intervention to prevent unpredictable situations.

[0127] As mentioned above, the above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A method for detecting mixed rainwater and sewage water, characterized in that: The steps include: Step S1: The original parameter detection device is installed in the source section of the liquid to be detected, and the original parameter value of the liquid to be detected is regularly detected, and the original parameter value of the liquid to be detected can also be manually set directly; Step S2: The real-time parameter detection device is installed in the section where the liquid to be detected flows, and the real-time parameter value of the flowing liquid in the flow pipe is regularly detected; Step S3: The detection parameters of the liquid to be detected include one or more of ammonia nitrogen concentration, temperature, and conductivity. The original parameter value of the liquid to be detected is compared with the real-time parameter value of the section through which the liquid flows. The difference between the original parameter value and the real-time parameter value is calculated based on the comparison result. The difference between different results may be as follows: (a) If the difference between the original parameter value and the real-time parameter value is within the set range, it is determined that no other liquid is mixed in the liquid to be tested; (b) If the difference between the original parameter value and the real-time parameter value is greater than the set range, it is determined that other liquids are mixed into the liquid to be tested; Step S4: If the difference between the original parameter value and the real-time parameter value is greater than the set range, the liquid parameter is abnormal and mixed flow occurs. When mixed flow occurs in the detected liquid, the location of the corresponding detection device is output and confirmed.

2. A method for detecting mixed rainwater and sewage water according to claim 1, characterized in that: The parameter detection position of the detection equipment is close to the central axis of the pipeline, that is, far away from the wall of the conveying pipe.

3. The method for detecting mixed rainwater and sewage water according to claim 1, characterized in that: When the detection parameters of the liquid to be detected include ammonia nitrogen concentration, temperature, and conductivity, the specific calculation formula is as follows: y=k1x1 n1 +k2x2 n2 +k3x3 n3 Where: y is the mixed flow test value; x1, x2, and x3 are the percentage changes of ammonia nitrogen concentration, temperature, and conductivity indicators, respectively, and the ratio of the corresponding parameter real-time value to the corresponding water quality average value is selected; k1, k2, and k3 are the coefficients of variation of ammonia nitrogen, temperature, and conductivity, respectively; n1, n2, and n3 are the influencing factors of changes in ammonia nitrogen, temperature, and conductivity respectively; When y exceeds the set range, it is judged as mixed flow; Then, by verifying and improving the calculation of the mixed flow ratio, using the data of ammonia nitrogen, temperature, conductivity, etc. collected from hundreds of sampling points, the machine algorithm is used to deduce the coefficients corresponding to each parameter, and finally the degree of mixed flow is determined. The specific calculation formula is as follows: Y=aN b +cW d +eD f Where: Y is the mixed flow ratio; N, W, and D are the index values ​​of ammonia nitrogen concentration, temperature, and conductivity, respectively; a and b are the coefficients of variation of ammonia nitrogen index; c and d are the coefficients of variation of temperature index; e and f are the coefficients of variation of conductivity index; By setting the range of the mixing ratio, 0≤Y<x1 is range one, which is judged as no mixing; x1≤Y<x2 is range two, which is judged as slight mixing; x2≤Y<x3 is range three, which is judged as severe mixing.

4. A method for detecting mixed rainwater and sewage water according to claim 3, characterized in that: After the initial determination of the presence of mixed flow in the liquid to be tested, the original parameter value of the liquid to be tested is updated, and then a secondary determination is performed on the liquid to be tested. The secondary determination results have the following two situations; (c) The second judgment is consistent with the first judgment result and is determined to be mixed flow; (d) If the secondary judgment is inconsistent with the initial judgment, the relevant operator is notified to conduct a work inspection or to conduct multiple subsequent inspections and judgments; If multiple subsequent judgments are consistent with the results of the initial judgment or the re-judgment, the abnormal judgment result is discarded.

5. A rainwater-sewage mixed flow water detection system, applied to a rainwater-sewage mixed flow water detection method according to any one of claims 1 to 4, comprising a source water test module, a real-time test module, a water quality homogeneity calculation module, a cycle timing module, a mixed flow calculation and analysis module and a result output module, characterized in that: The source water test module is connected to the water quality homogenization calculation module by signal, the water quality homogenization calculation module and the real-time test module are both connected to the mixed flow calculation and analysis module by signal, the source water test module and the real-time test module are both connected to the cycle timing module by signal, and the mixed flow calculation and analysis module is connected to the result output module by signal; The source water testing module detects corresponding parameters of the liquid to be tested; The real-time testing module detects the corresponding parameters of the middle section or downstream section of the liquid to be tested; The water quality homogenization calculation module calculates the parameter average value of the source water quality according to the multiple groups of data measured by the source water testing module within a certain period of time; The cycle timing module calculates the time cycle and sets different update cycles in advance for the source water test module and the real-time test module; The mixed flow calculation and analysis module calculates the mixed flow test value and determines whether mixed flow occurs in the liquid to be tested according to the set value; The result output module outputs the mixed flow test value corresponding to the real-time test module at each position.

6. A rainwater-sewage mixed flow detection system according to claim 5, characterized in that: It also includes a GPS positioning module that is signal-connected to the source water testing module and the real-time testing module, and the GPS positioning module is signal-connected to the mixed flow calculation and analysis module.

7. A rainwater-sewage mixed flow detection system according to claim 6, characterized in that: It also includes a mixed flow re-inspection module that is signal-connected to the mixed flow calculation and analysis module, the source water test module, the real-time detection module, and the GPS positioning module. When the value output by the mixed flow calculation and analysis module is within the mixed flow range, the mixed flow re-inspection module intercepts the data, and locks the source water test module at the calibrated position and the real-time detection module in the same flow pipeline at the corresponding position through the GPS positioning module to perform real-time data updates, and recalculates the updated mixed flow test value. The result output module uses the calculation result of the updated data as the final output value.

8. A rainwater-sewage mixed flow detection system according to claim 7, characterized in that: It also includes a display module, a client and an alarm module. The display module displays the detection status corresponding to each test module through a display screen and marks the mixed flow position. The client and the alarm module are both connected to the result output module signal.

9. A rainwater-sewage mixed flow detection system according to claim 8, characterized in that: The detection module includes an ammonia nitrogen detector, a water temperature detector and a conductivity detector.

10. A rainwater-sewage mixed flow detection system according to claim 9, characterized in that: The mixed flow re-inspection module is connected to the cycle timing module signal. While the mixed flow re-inspection module controls the update of the detection data, it will simultaneously transmit the signal to the cycle timing module, so that the cycle start time corresponding to the source water test module and the real-time test module at the corresponding position will be updated accordingly.

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