A sewer network system operation condition rapid diagnosis and evaluation method and system

Abstract

The present application relates to a kind of sewer network system operating condition quick diagnosis and evaluation method and system, the method is through field investigation information, through sewage system operating condition diagnosis and evaluation method, rainwater system operating condition diagnosis and evaluation method, pipe network operating defect diagnosis and evaluation method, plant network system operating condition diagnosis and evaluation method, plant network system matching diagnosis and evaluation method evaluation different pipe network operating condition, quickly understand the present situation of pipe network system Running state, provide preliminary basis for decision, with low cost, short cycle.In addition, the prior art method is mostly suitable for pipe network defect diagnosis, the technical scheme provided in the present application can not only be used for pipe network defect diagnosis using limited field investigation information, but also applicable to the evaluation of sewage, rainwater, combined flow and other different pipe network operating condition, plant network system operating condition, plant network system matching and the like.

Description

Technical Field

[0001] The present invention relates to the field of municipal environmental protection, and in particular to a method and system for quickly diagnosing and evaluating the operating conditions of a drainage network system. Background Art

[0002] With the rapid advancement of urbanization, urban planning and construction have been plagued by the drawbacks of prioritizing surface areas over underground development and prioritizing appearance over substance. Consequently, invisible and intangible underground projects like drainage networks have become a test of a city's conscience. Lagging infrastructure development has left drainage systems with significant shortcomings. While informatization and smart water management have advanced rapidly in recent years, and some cities have established municipal drainage network information management systems that enable management, inspection, and monitoring of drainage networks, many more cities have yet to establish drainage network databases. Consequently, network information remains fragmented, making rapid diagnosis and assessment of network operating conditions challenging.

[0003] Existing technologies include television inspection, sonar inspection, pipeline periscope inspection, and traditional inspection methods (such as visual inspection, simple tools, and diving inspection). These methods are relatively costly, time-consuming, and hardware-dependent. They are generally suitable for tasks such as pipe network surveys that occur only once every few years, but are less effective for short-term, large-scale pipe network diagnosis and assessment. Summary of the Invention

[0004] The purpose of the present invention is to provide a method and system for diagnosing and evaluating the operating conditions of a drainage pipe network system, so as to solve the problem that the existing method for diagnosing and evaluating the operating conditions of a drainage pipe network system relies on hardware means and has low evaluation efficiency.

[0005] According to a first aspect of an embodiment of the present invention, a method for diagnosing and evaluating the operating condition of a drainage network system is provided, comprising:

[0006] The sewage system operation condition diagnosis and assessment method is used to determine whether the sewage well water source composition is normal or whether there is sewage mixing from other sources; to determine whether there is rainwater access to the sewage system and the extent of access; to determine whether there is river and lake water mixing in the sewage system and the extent of mixing;

[0007] The diagnostic and evaluation method for the rainwater system operating conditions is used to determine whether the composition of the rainwater well water source is normal or whether there is other sewage sources mixed in; to determine whether there is sewage mixing misconnection in the rainwater system and the degree of misconnection; to determine the degree of external water mixing in the rainwater system;

[0008] Pipeline network operation defect diagnosis and assessment method, used to diagnose and assess the probability of pipeline network operation defects;

[0009] The plant-grid system operating condition diagnosis and evaluation method is used to diagnose and evaluate the system operating condition based on the principle of water volume and load balance of the plant-grid system;

[0010] The plant network system matching diagnosis and evaluation method is used for evaluating the plant network system matching according to preset sewage treatment evaluation indexes.

[0011] Preferably, the judgment of whether the water source composition of the sewage well is normal or other sewage sources are mixed in includes:

[0012] Only dry day data, the water level of the sewage well in the dry day operation condition is judged, and the water level includes: normal water level and high water level;

[0013] Under the normal water level, if the ammonia nitrogen pollutant concentration is >10 mg / L, it is determined that the water source composition of the sewage well is normal; if the ammonia nitrogen pollutant concentration is ≤10 mg / L, it is determined that the water source of the sewage well has other sewage sources mixed in, including:

[0014] river and lake water, groundwater, construction drainage;

[0015] Under the high water level, if the ammonia nitrogen pollutant concentration is >10 mg / L, it is determined that the water source composition of the sewage well is normal;

[0016] If the ammonia nitrogen pollutant concentration is ≤10 mg / L and there is no obvious difference in water level and water quality with the adjacent rainwater well, it is determined that there is rainwater and sewage mixing or connection; if the ammonia nitrogen pollutant concentration is ≤10 mg / L and there is obvious difference in water level and water quality with the adjacent rainwater well and there is no obvious difference in water quality with the end sewage treatment system, it is determined that the water source of the sewage well has other sewage sources mixed in, including: river and lake water, groundwater, construction drainage; if the ammonia nitrogen pollutant concentration is ≤10 mg / L and there is obvious difference in water level and water quality with the adjacent rainwater well and there is great difference in water quality with the end sewage treatment system, it is determined that the sewage system is seriously deposited;

[0017] When there are dry day and rainy day data, the sewage well is sampled, if the sampled TN concentration change rate is >20%, it is determined that the water source composition of the sewage well may have rainwater access; if the sampled TN concentration change rate is ≤20%, it is determined that the water source composition of the sewage well is normal.

[0018] Preferably, the judgment of whether the sewage system has rainwater access and the access degree includes: judging whether there is rainwater access according to the correlation between daily rainfall and daily operation water quantity of the sewage pump station or the sewage treatment plant; or, judging whether there is rainwater access according to the correlation between daily rainfall and daily water inlet ammonia nitrogen concentration of the sewage pump station or the sewage treatment plant; or, judging whether there is rainwater access according to t test analysis of weather data and daily water inlet quantity data recorded by the sewage plant or the sewage pump station;

[0019] The rainwater access degree is judged according to the daily water inlet quantity of the sewage system under dry day and rainy day conditions.

[0020] Preferably, the judgment of whether the sewage system has river and lake water mixed in and the mixing degree includes:

[0021] According to the comparison of the concentration of municipal pipeline, the concentration of sewage pumping station, the concentration of sewage plant, and the concentration of surface water in dry weather, if the concentration of pumping station / concentration of sewage plant is lower than 1 / 2 of the average concentration of pipeline, or the difference between the concentration of pumping station and the concentration of surface water is within 20%, it is determined that the sewage system may have river and lake water mixed in;

[0022] The degree of river and lake water mixing is calculated according to the water balance method and the pollution load balance method.

[0023] Preferably, the judgment of whether the water source composition of the rainwater well is normal or other sewage sources are mixed in includes:

[0024] Only dry weather data is available, the water level of the rainwater well in dry weather operation is judged, and the water level includes: normal water level and high water level.

[0025] At normal water level, if the ammonia nitrogen pollutant concentration is >10 mg / L, it is determined that there is sewage mixing; if the ammonia nitrogen pollutant concentration is ≤10 mg / L and there is no obvious water flow in dry weather, it is determined that the water source composition of the rainwater well is normal; if the ammonia nitrogen pollutant concentration is ≤10 mg / L and there is water flow in dry weather, it is determined that the water source of the rainwater well has other sewage sources mixed in, including: river and lake water, groundwater, and construction drainage.

[0026] At high water level, if there is no obvious difference in water quality with adjacent sewage wells, it is determined that there is rain and sewage connection; if there is obvious difference in water quality with adjacent sewage wells and the ammonia nitrogen pollutant concentration is >10 mg / L, it is determined that there is sewage mixing; if there is obvious difference in water quality with adjacent sewage wells and the ammonia nitrogen pollutant concentration is ≤10 mg / L, and there is no obvious difference in water quality with the end rainwater system, it is determined that other sewage sources are mixed in, including: river and lake water, groundwater, and construction drainage; if there is obvious difference in water quality with adjacent sewage wells and the ammonia nitrogen pollutant concentration is ≤10 mg / L, and there is a large difference in water quality with the end rainwater system, it is determined that the rainwater system has serious sedimentation.

[0027] Preferably, the judgment of whether the rainwater system has sewage mixing and the degree of mixing includes:

[0028] If there is continuous water flow at the end of the rainwater system in dry weather and the water quality concentration is similar to that of the sewage system, it is determined that there is sewage mixing; if there is continuous water flow at the end of the rainwater system in dry weather and the water quality concentration is similar to that of the surface water, it is determined that other sewage sources are mixed in, including: river and lake water, groundwater, and construction drainage; if there is no continuous water flow at the end of the rainwater system in dry weather, it is determined that the rainwater system has no mixing.

[0029] The degree of sewage mixing is represented by mixing density or mixing water quantity ratio; wherein the mixing density is the ratio of the number of sewage mixing points in the rainwater pipeline to the total number of rainwater wells investigated; and the mixing water quantity ratio is the ratio of the total water quantity of sewage mixing in the rainwater system obtained by investigation to the total sewage production in the investigated area.

[0030] Preferably, the judging the rainwater system external water mixing degree comprises:

[0031] The rainwater system discharged by the rainwater pump station is characterized by the ratio of the rainwater pump station water inflow to the total volume of the rainwater pipeline on dry days, and the rainwater system without rainwater pump station is characterized by the rainwater system water storage volume divided by the total volume of the pipeline on dry days; the external water includes river and lake water, groundwater, and construction drainage.

[0032] Preferably, the diagnosis and evaluation of the system operation condition according to the principle of water quantity and load balance of the plant network system comprises:

[0033] Based on the water quantity and load balance relationship calculation of the instantaneous state, the sewage collection water quantity and the water quantity of the external water mixed into the sewage system are calculated.

[0034] Based on the diagnosis and evaluation of the long sequence operation effect of the system, the long sequence operation parameters of the plant network system are evaluated, and the long sequence operation parameters include the annual overflow frequency, overflow quantity, overflow pollution load, and interception multiple.

[0035] Preferably, the evaluation of the plant network system matching according to the preset sewage treatment evaluation index comprises:

[0036] According to the diagnosis and evaluation index of the plant network matching of the separated system, the plant network matching of the separated system is quickly diagnosed and evaluated.

[0037] According to the diagnosis and evaluation index of the plant network matching of the combined system or interception system, the plant network matching of the combined system or interception system is quickly diagnosed and evaluated.

[0038] According to the second aspect of the embodiment of the present application, a drainage pipe network system operation condition diagnosis and evaluation system is provided, comprising:

[0039] The sewage system operation condition diagnosis and evaluation system is used to judge whether the sewage well water source composition is normal or other sewage sources are mixed in; to judge whether the sewage system has rainwater access and the access degree; and to judge whether the sewage system has river and lake water mixing and the mixing degree.

[0040] The rainwater system operation condition diagnosis and evaluation system is used to judge whether the rainwater well water source composition is normal or other sewage sources are mixed in; to judge whether the rainwater system has sewage mixing and the mixing degree; and to judge the rainwater system external water mixing degree.

[0041] The pipe network operation defect diagnosis and evaluation system is used to diagnose and evaluate the probability of pipe network operation defects.

[0042] The plant network system operation condition diagnosis and evaluation system is used for diagnosing and evaluating the operation condition of the system according to the principle of water quantity and load balance of the plant network system.

[0043] The plant network system matching diagnosis and evaluation system is used for evaluating the matching of the plant network system according to preset sewage treatment evaluation indexes.

[0044] The technical scheme provided by the embodiment of the present application can include the following beneficial effects:

[0045] By means of the field investigation information, the sewage system operation condition diagnosis and evaluation method, the rainwater system operation condition diagnosis and evaluation method, the pipe network operation defect diagnosis and evaluation method, the plant network system operation condition diagnosis and evaluation method and the plant network system matching diagnosis and evaluation method, different pipe network operation conditions are evaluated, the current operation state of the pipe network system is quickly understood, and a preliminary basis is provided for decision-making, which is low in cost and short in cycle. In addition, the prior art method is mostly suitable for pipe network defect diagnosis, the technical scheme provided by the present application is not only suitable for pipe network defect diagnosis by means of limited field investigation information, but also suitable for evaluation of operation conditions of different pipe networks such as sewage, rainwater and combined flow, operation conditions of the plant network system and matching of the plant network system.

[0046] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0047] The accompanying drawings incorporated in the specification and constituting a part hereof illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application.

[0048] Figure 1 is a flow chart of a drainage pipe network system operation condition diagnosis and evaluation method according to an exemplary embodiment;

[0049] Figure 2 is a flow chart of a sewage well water source composition rapid diagnosis and evaluation method only with dry day data according to an exemplary embodiment;

[0050] Figure 3 is a flow chart of a sewage well water source composition rapid diagnosis and evaluation method with both dry day and rainy day data according to an exemplary embodiment;

[0051] Figure 4 is a mixed connection ratio distribution diagram of each rainfall according to an exemplary embodiment;

[0052] Figure 5 is a flow chart of a rainwater well dry day operation condition rapid diagnosis and evaluation method according to an exemplary embodiment;

[0053] Figure 6 is a flow chart of a rainwater system dry day mixed connection diagnosis and evaluation method according to an exemplary embodiment. DETAILED DESCRIPTION

[0054] The exemplary embodiments will be described in detail below with reference to the attached drawings. In the following description, the same numbers are used to denote the same elements throughout the several views. The embodiments described in the following exemplary embodiments are not meant to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the appended claims.

[0055] As can be seen from the foregoing discussion of the background art, the existing water power water quality model software related to urban pipe network mainly includes SWMM, InfoWorks ICM, MIKE URBAN, etc., which are highly professional and require deep professional foundation to operate. Moreover, the basic data required by the professional software is very complete, and in general, the region with pipe network survey data or the project that has entered the operation stage has the condition to establish a mathematical model.

[0056] In addition, the existing research mainly relies on three aspects: one is the existing pipe network information database to extract the basic information of the pipe network, such as pipe length, pipe diameter, buried depth, etc.; one is the existing pipe network detection results, which are mainly obtained based on the Technical Specification for Urban Drainage Pipe Detection and Evaluation (CJJ 181-2012); and the other is the pipe network water power water quality mathematical model, and the establishment of the model completely depends on the completeness of the pipe network information database. These foundations all need a lot of preliminary work, which are suitable for the system planning stage, but not suitable for the stage of quickly judging the project situation in the early stage of the project.

[0057] In view of the disadvantages of the existing drainage pipe network system information being insufficient and difficult to obtain, the existing drainage pipe network system operation condition diagnosis and evaluation method relying on hardware means and the evaluation efficiency being low, and the existing technical method being not suitable for fast diagnosis and evaluation, the present application proposes the following several exemplary embodiments, which are as follows:

[0058] Embodiment One

[0059] Figure 1 is a flow chart of a drainage pipe network system operation condition diagnosis and evaluation method according to an exemplary embodiment, as shown in Figure 1 The method comprises the following steps.

[0060] Step S11, a sewage system operation condition diagnosis and evaluation method is used to judge whether the sewage well water source composition is normal or other sewage sources are mixed; to judge whether the sewage system has rainwater access and the access degree; to judge whether the sewage system has river and lake water mixed and the mixing degree;

[0061] Step S12, the rainwater system operating condition diagnosis and evaluation method is used to determine whether the water source composition of the rainwater well is normal or other sewage sources are mixed in; to determine whether the rainwater system has sewage mixed connection and the degree of mixed connection; to determine the degree of external water mixed into the rainwater system;

[0062] Step S13, the pipe network operating defect diagnosis and evaluation method is used to diagnose and evaluate the probability of pipe network operating defects;

[0063] Step S14, the plant network system operating condition diagnosis and evaluation method is used to diagnose and evaluate the system operating condition according to the principle of water quantity and load balance of the plant network system;

[0064] Step S15, the plant network system matching diagnosis and evaluation method is used to evaluate the matching of the plant network system according to the preset sewage treatment evaluation index.

[0065] It should be noted that the technical scheme provided in the embodiment is suitable for: in the case of lack of hardware investment, the operating condition of the urban drainage system is quickly evaluated through accurate investigation and collection.

[0066] In specific practice, the sewage system operating condition diagnosis and evaluation method, the rainwater system operating condition diagnosis and evaluation method, the pipe network operating defect diagnosis and evaluation method, the plant network system operating condition diagnosis and evaluation method, and the plant network system matching diagnosis and evaluation method have the evaluation framework shown in Table 1 as follows:

[0067]

[0068]

[0069] Table 1

[0070] In specific practice, the determination of whether the water source composition of the sewage well is normal or other sewage sources are mixed in includes:

[0071] 1. Only dry day data is used to determine the water level of the sewage well in dry day operation, and the water level includes: normal water level and high water level (see Table 2, if the water level in the well exceeds the maximum design fullness in Table 2, it is high water level operation, otherwise it is normal water level operation);

[0072] Sewage well pipe diameter or channel height (mm) Maximum design fullness 200-300 0.55 350-450 0.65 500-900 0.70 ≥1000 0.75

[0073] Table 2

[0074] See Figure 2, normal water level, if ammonia nitrogen pollutant concentration > 10mg / L, then determine the sewage well water source composition normal; if ammonia nitrogen pollutant concentration ≤ 10mg / L, then determine that the sewage well water source has other sewage mixed in, including: river and lake water, groundwater, construction drainage;

[0075] High water level, if ammonia nitrogen pollutant concentration > 10mg / L, then determine the sewage well water source composition normal; if ammonia nitrogen pollutant concentration ≤ 10mg / L, and there is no significant difference with the adjacent rainwater well water level and water quality, then determine that there is rainwater and sewage mixing or connection; if ammonia nitrogen pollutant concentration ≤ 10mg / L, and there is a significant difference with the adjacent rainwater well water level and water quality, and there is no significant difference with the end sewage treatment system water quality, then determine that the sewage well water source has other sewage mixed in, including: river and lake water, groundwater, construction drainage; if ammonia nitrogen pollutant concentration ≤ 10mg / L, and there is a significant difference with the adjacent rainwater well water level and water quality, and there is a large difference with the end sewage treatment system water quality, then determine that the sewage system is seriously deposited;

[0076] 2, there are dry and rainy day data, see Figure 3 , if the sampled TN (total nitrogen) concentration change rate > 20%, determine that the sewage well water source composition may have rainwater access; if the sampled TN concentration change rate ≤ 20%, determine that the sewage well water source composition is normal.

[0077] In specific practice, the judgment of whether the sewage system has rainwater access and the access degree includes: judging whether there is rainwater access according to the correlation between daily rainfall and daily operation water quantity of the sewage pump station or sewage treatment plant; or, judging whether there is rainwater access according to the correlation between daily rainfall and daily water ammonia nitrogen concentration of the sewage pump station or sewage treatment plant; or, judging whether there is rainwater access according to t-test analysis of weather data and daily water quantity data recorded by the sewage plant or sewage pump station;

[0078] According to the daily water quantity of the sewage system under dry and rainy conditions to determine the degree of rainwater access.

[0079] Wherein, according to the daily water inflow of the sewage system in dry and rainy days to determine the rainwater access degree, including: ① calculating the daily dry day sewage, if there is no rainfall or rainfall is less than or equal to 2mm, the dry day sewage is the daily sewage, if the daily rainfall is more than 2mm, the dry day sewage is the sewage of the previous dry day; ② calculating the daily rainwater access ratio. The absolute value of the percentage of the daily inflow exceeding the daily dry day sewage is defined as the rainwater access ratio; ③ making a curve of the daily rainwater access ratio and its cumulative percentage, first removing the zero value rainwater access ratio, then arranging the daily rainwater access ratio from small to large, then calculating the cumulative percentage of the daily rainwater access ratio, finally making a curve, if the curve has an obvious inflection point, the rainwater access ratio corresponding to the inflection point is the rainwater access rate, if the curve has no obvious inflection point, the non-zero average value of the daily rainwater access ratio is the rainwater access rate.

[0080]

[0081] In the formula: is the rainwater mixed water quantity ratio, which refers to the proportion of rainwater quantity in the total sewage production in the region in the sewage system;

[0082] Q 雨 is the rainwater access degree of the sewage system in rainy days, m 3 / d.

[0083] Q is the total sewage production of the surveyed area, m 3 / d.

[0084] is calculated by daily data, if there is no rainfall on the day, the dry day sewage is the daily sewage, if the daily rainfall is more than 2mm, Q 雨 is the daily system water delivery quantity, Q refers to the sewage quantity of the previous dry day. According to the cumulative frequency curve of the daily rainwater mixed ratio in a year, the average mixed level of the system is determined, generally the mixed rate is determined by the inflection point of the cumulative frequency curve, if the curve has no obvious inflection point, the average value of the daily mixed rate is taken. Taking TZH sewage pumping station as an example, the catchment area is 7.34km 2 , the mixed proportion distribution results of each rainfall are shown in Figure 4 , it can be seen that when the cumulative frequency is 80%, the curve has an obvious inflection point, and the mixed rate is about 0.15, so the average rainwater access rate of the system is 15%.

[0085] In specific practice, the judgment of whether there is river and lake water mixed into the sewage system and the mixed degree includes:

[0086] 1) judging whether there is river and lake water mixed in

[0087] According to the comparison of the concentration of municipal pipeline under dry weather condition, the concentration of sewage pumping station, the concentration of sewage plant, and the concentration of surface water, if the concentration of pumping station / concentration of sewage plant is lower than 1 / 2 of the average concentration of pipeline, or the difference between the concentration of pumping station / concentration of sewage plant and the concentration of surface water is within 20%, it is judged that there may be river and lake water mixed in.

[0088] 2) Determine the degree of river and lake water mixing

[0089] According to the water balance method and the pollution load balance method, the degree of river and lake water mixing is calculated. Specifically, eight parameters are needed, including the storage capacity of drainage pipe network system, the treatment capacity of sewage plant, the overflow discharge, the rainwater inflow, the concentration of raw sewage, the concentration of river and lake water, the concentration of drainage pipe network, and the concentration of rainwater runoff.

[0090] Collected sewage quantity Q 污收 Rainwater inflow Q 雨接 River and lake water mixing quantity Q 河湖 System storage capacity Q 调蓄 Plant treatment capacity Q 厂站 Overflow discharge Q 排 Satisfy the following formula (1):

[0091] Q 污收 +Q 雨接 +Q 河湖 =Q 调蓄 +Q 厂站 +Q 排 (1)

[0092] At the same time, sewage concentration C 污 Rainwater concentration C 雨 River and lake water concentration C 河湖 Pipe network concentration C 管 Satisfy the following formula (2):

[0093]

[0094] The above formulas (1) and (2) are used to calculate the sewage collection quantity and the river and lake water mixing quantity:

[0095]

[0096] Q 河湖 =Q 调蓄 +Q 厂站 +Q 排 -Q 污收 -Q 雨接

[0097] In specific practice, the judgment of whether the rainwater well water source composition is normal or other sewage source mixing includes:

[0098] Referring to Figure 5If there is no obvious water flow in the rainwater well on a dry day, the rainwater well group is normal; if there is obvious water flow in the rainwater well on a dry day, and if there is no obvious difference in water quality with the adjacent sewage well, it is determined that there is rainwater and sewage connection; if there is obvious difference in water quality with the adjacent sewage well, and the ammonia nitrogen pollutant concentration is >10 mg / L, it is determined that there is sewage mixing; if there is obvious difference in water quality with the adjacent sewage well, and the ammonia nitrogen pollutant concentration is ≤10 mg / L, and there is no obvious difference in water quality with the end rainwater system, it is determined that other sewage sources are mixed, including: river and lake water, groundwater, construction drainage; if there is obvious difference in water quality with the adjacent sewage well, and the ammonia nitrogen pollutant concentration is ≤10 mg / L, and there is a large difference in water quality with the end rainwater system, it is determined that the rainwater system is seriously deposited.

[0099] In specific practice, referring to Figure 6 , the judgment of whether there is sewage mixing and the degree of mixing includes:

[0100] If there is continuous water flow in the end of the rainwater system on a dry day, and the water quality concentration is similar to that of the sewage system, it is determined that there is sewage mixing; if there is continuous water flow in the end of the rainwater system on a dry day, and the water quality concentration is similar to that of the surface water, it is determined that there is other sewage source mixing, including: river and lake water, groundwater, construction drainage; if there is no continuous water flow in the end of the rainwater system on a dry day, it is determined that there is no mixing in the rainwater system.

[0101] The degree of sewage mixing is represented by mixing density or mixing water quantity ratio; wherein the mixing density is the ratio of the number of sewage mixing points in the rainwater pipeline to the total number of investigated rainwater wells; the mixing water quantity ratio is the ratio of the total water quantity of sewage mixing in the rainwater system obtained by investigation to the total sewage production in the investigated area.

[0102] In specific practice, the judgment of the degree of external water mixing in the rainwater system includes:

[0103] For rainwater systems discharged by rainwater pump stations, the degree of external water mixing is represented by the ratio of the water inflow of the rainwater pump station on a dry day to the total volume of the rainwater pipeline; for self-flow discharge systems without rainwater pump stations, the degree of external water mixing is represented by the ratio of the water storage in the rainwater system on a dry day to the total volume of the pipeline; the external water includes: river and lake water, groundwater, construction drainage.

[0104] In specific practice, the pipe network operation defect rapid diagnosis and evaluation method includes:

[0105] The basic information is input, according to the Technical Specification for Urban Drainage Pipe Detection and Evaluation (CJJ181-2012), the pipe network defects include structural defects and functional defects, the structural defects include rupture, deformation, corrosion, misalignment, undulation, dislocation, interface material falling off, branch pipe dark connection, foreign matter penetration, leakage and the like 10 kinds, the functional defects include deposition, scaling, obstacle, residual wall dam root, tree root, dregs and the like 6 kinds. If the actual evaluation pipe network operation defect is needed, the television detection, sonar detection, pipe periscope detection and the like are carried out, the time is long, the investment is large. The embodiment is based on the pipe network attribute information (such as pipe length, slope, buried depth and the like) and quickly diagnoses the pipe network operation defect, and the data mining and machine learning method research are obtained.

[0106] The pipe network operation defect evaluation needs 16 attributes of pipe diameter, pipe length, buried depth, absolute slope, pipe age, road width, road position, road surface condition, road slope, well surface to tree distance, tree size, pipe shape, well surface to water surface distance, flow velocity, deposition thickness, well wall whether perfect, well lid whether perfect and the like. The pipe length, buried depth, absolute slope, well surface to tree distance, well surface to water surface distance and the like 5 attributes have greater influence on the model accuracy, should ensure the accuracy, other attributes can be fuzzy input. According to the above attributes, the probability of misalignment, rupture, tree root (tree root intrusion pipe structure), obstacle (whether there is obstacle blockage), deposition and the like five kinds of defects can be evaluated.

[0107] It can be understood that, compared with the traditional way of checking pipe defects by hardware, such as CCTV, pipe endoscopy, and obtaining pipe network flow and quality rules by monitoring instrument layout, the technical scheme provided by the embodiment does not need hardware investment, and can greatly improve work efficiency. Through the method of experience summary and machine learning, the correlation between key research indicators and system operation conditions is established. The pipe network operation defect rapid diagnosis and evaluation utilizes machine learning technology to establish a prediction model of pipe basic attributes, ground related conditions and pipe operation defect probability, which can quickly evaluate the probability of possible pipe operation defects based on relatively easy-to-obtain data.

[0108] In specific practice, the diagnosis and evaluation of system operation conditions according to the principle of water quantity and load balance of plant and network system, comprising:

[0109] Based on the water quantity and load balance relationship calculation of instantaneous state, the sewage collection water quantity and the water quantity of external water mixed into the sewage system are calculated;

[0110] Based on the system long sequence operation effect diagnosis and evaluation, the long sequence operation parameters of the plant and network system are evaluated, and the long sequence operation parameters include: annual overflow frequency, overflow volume, overflow pollution load, interception multiple.

[0111] It needs to be explained that: (1) Based on the instantaneous state of water and load balance relationship calculation

[0112] The water and load balance relationship of the plant network system is based on the instantaneous state evaluation, mainly involving the sewage collection part, the rainwater entering the sewage system part, the external water mixing into the sewage system part, the system storage part, the sewage plant station transportation and treatment part, the system overflow discharge and the like 6 parts, satisfying the above formula (1), formula (2).

[0113] Among them, the rainwater entering the sewage system is determined according to the above first part "rainwater access degree judgment", the system storage part is roughly estimated according to the pipe network fullness and the volume of each storage facility, the sewage plant station transportation and treatment capacity is obtained according to the plant station water inlet data, or the plant station transportation and treatment capacity is replaced, the instantaneous system overflow discharge is roughly estimated according to the investigation, combined with the original sewage concentration, river and lake water concentration, pipe network concentration and rainwater runoff concentration which can be obtained by investigation, then the sewage collection water and the external water mixed into the sewage system are calculated according to formula 3.

[0114] (2) System long sequence operation effect diagnosis and evaluation

[0115] In the long sequence operation, the plant network system of each time step also satisfies the water and load balance relationship of each period.

[0116] The water input elements of each time step include the collected original sewage, the rainwater entering the sewage system, the river and lake water mixing amount, the system storage amount, the plant station treatment amount, wherein the collected original sewage and the river and lake water mixing amount are obtained according to the above "water and load balance relationship calculation based on instantaneous state", and the output element is the period overflow amount.

[0117] The water quality input elements of each time step include the original sewage concentration, the rainwater runoff concentration and the surface water concentration, and the output elements include the pipe concentration, and the concentration of the storage facility, the plant station inlet concentration and the overflow concentration are obtained from the pipe concentration.

[0118] Through the overflow amount and the overflow concentration of each time step, the annual overflow frequency, the overflow amount, the overflow pollution load and the interception multiple of the plant network system in the long sequence operation can be evaluated.

[0119] Among them, (1) the water and load balance relationship calculation based on the instantaneous state, and (2) the system long sequence operation effect diagnosis and evaluation, are both carried out in units of plant network partition units.

[0120] In specific practice, the evaluation of the matching of the plant network system according to the preset sewage treatment evaluation index comprises:

[0121] According to the diagnosis and evaluation index of the matching of the separated system plant network, the matching of the separated system plant network is quickly diagnosed and evaluated;

[0122] According to the diagnostic evaluation index of the combined system or intercept system plant network matching, the combined system or intercept system plant network matching is quickly diagnosed and evaluated.

[0123] (1) Quick diagnosis and evaluation of plant network matching of separate system

[0124] The diagnostic evaluation index of the plant network matching of the separate system is the sewage water collection rate, the sewage pollution load collection rate, the daily average treatment water volume of the sewage plant, and the daily water volume change range of the sewage plant.

[0125] The sewage water collection rate is the ratio of the collected sewage volume to the original sewage volume. The collected sewage volume is calculated by formula 3 above, and the original sewage volume is estimated according to the population method, land use method or water supply method.

[0126] The sewage pollution load collection rate is the ratio of the pollution load of the collected sewage to the pollution load of the original sewage. The pollution load of the collected sewage is the product of the collected sewage volume and the sewage inlet concentration of the sewage treatment plant, and the pollution load of the original sewage is the product of the original sewage volume and the original sewage concentration investigated.

[0127] The daily average treatment water volume of the sewage plant is obtained by statistical analysis of the long sequence operation data of the sewage plant.

[0128] The daily water volume change range of the sewage plant is the range from the minimum treatment capacity to the maximum treatment capacity during normal operation of the sewage plant.

[0129] The evaluation system is shown in Table 3 below:

[0130]

[0131]

[0132] Table 3

[0133] (2) Quick diagnosis and evaluation of plant network matching of combined system / intercept system

[0134] The diagnostic evaluation of the plant network matching of the combined system / intercept system includes the sewage water collection rate, the sewage pollution load collection rate, the daily average treatment water volume of the sewage plant, the daily water volume change range of the sewage plant, and the system intercept capacity.

[0135] The definitions of the sewage water collection rate, the sewage pollution load collection rate, the daily average treatment water volume of the sewage plant, and the daily water volume change range of the sewage plant are the same as those in (1) Quick diagnosis and evaluation of plant network matching of separate system.

[0136] The system intercept capacity is estimated according to the method provided in "System long sequence operation effect diagnosis and evaluation".

[0137] The evaluation system is shown in Table 4 below:

[0138]

[0139]

[0140]

[0141] Table four

[0142] It can be understood that the technical scheme provided by the embodiment, through field investigation information, does not need to have a complete database system, and through the sewage system operation condition diagnosis and evaluation method, the rainwater system operation condition diagnosis and evaluation method, the pipe network operation defect diagnosis and evaluation method, the plant network system operation condition diagnosis and evaluation method, and the plant network system matching diagnosis and evaluation method, the different pipe network operation conditions are evaluated, the current running state of the pipe network system is quickly understood, and a preliminary basis is provided for decision-making, which is low in cost and short in cycle. In addition, the prior art method is mostly suitable for pipe network defect diagnosis, and the technical scheme provided by the present application can not only be used for pipe network defect diagnosis by using limited field investigation information, but also be suitable for evaluation of operation conditions of different pipe networks such as sewage, rainwater, combined flow, operation conditions of plant network systems, and matching of plant network systems.

[0143] Embodiment two

[0144] According to one of the drainage pipe network system operation condition diagnosis and evaluation systems shown in an exemplary embodiment, the system comprises:

[0145] The sewage system operation condition diagnosis and evaluation system is used to determine whether the water source composition of the sewage well is normal or other sewage sources are mixed; whether the sewage system has rainwater access and the access degree; and whether the sewage system has river and lake water mixed and the mixing degree.

[0146] The rainwater system operation condition diagnosis and evaluation system is used to determine whether the water source composition of the rainwater well is normal or other sewage sources are mixed; whether the rainwater system has sewage mixed and connected incorrectly and the incorrect connection degree; and the rainwater system external water mixing degree.

[0147] The pipe network operation defect diagnosis and evaluation system is used to diagnose and evaluate the probability of pipe network operation defects.

[0148] The plant network system operation condition diagnosis and evaluation system is used to diagnose and evaluate the system operation condition according to the principle of water quantity and load balance of the plant network system.

[0149] The plant network system matching diagnosis and evaluation system is used to evaluate the matching of the plant network system according to the preset sewage treatment evaluation index.

[0150] It should be noted that the technical scheme provided in the embodiment is applicable to: in the case of lack of hardware investment, the operation conditions of the urban drainage system are quickly evaluated through accurate investigation and collection of funds.

[0151] It can be understood that the technical scheme provided in the embodiment can quickly understand the current operation state of the pipe network system by evaluating different pipe network operation conditions through the field investigation information, without needing to have a complete database system, through the sewage system operation condition diagnosis and evaluation method, the rainwater system operation condition diagnosis and evaluation method, the pipe network operation defect diagnosis and evaluation method, the plant network system operation condition diagnosis and evaluation method, and the plant network system matching diagnosis and evaluation method, and providing a preliminary basis for decision-making, which is low in cost and short in cycle. In addition, the prior art method is mostly applicable to pipe network defect diagnosis, and the technical scheme provided in the present application is not only applicable to pipe network defect diagnosis using limited field investigation information, but also applicable to the evaluation of the operation conditions of different pipe networks such as sewage, rainwater, and combined flow, the operation conditions of the plant network system, and the matching of the plant network system.

[0152] It can be understood that the same or similar parts in the above embodiments can be mutually referred to, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0153] It should be noted that in the description of the present application, the terms "first", "second", and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is at least two.

[0154] Any process or method descriptions in flow charts or described elsewhere herein can be understood as representing code modules, segments, or portions of code that include one or more executable instructions for implementing specific logic functions or other processes, and the various embodiments of the present application include additional implementations in which the functions described with reference to the figures are implemented by hardware that is different from that shown or discussed, including hardware capable of performing the functions described with reference to the figures in a substantially simultaneous manner or in reverse order. This should be understood by those skilled in the art of the embodiments of the present application.

[0155] Those skilled in the art of the present technology can understand that all or part of the steps carried out by the above-mentioned embodiment method can be instructed by a program to complete the relevant hardware, and the program can be stored in a computer readable storage medium. When the program is executed, it includes one of the steps of the method embodiment or a combination thereof.

[0156] In addition, each function unit in each embodiment of the present application can be integrated in one processing module, or each unit can be physically present separately, or two or more units can be integrated in one module. The integrated module can be realized in the form of hardware, or in the form of a software function module. When the integrated module is realized in the form of a software function module and sold or used as an independent product, it can also be stored in a computer readable storage medium.

[0157] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0158] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0159] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A method for diagnosing and evaluating the operating conditions of a drainage network system, characterized in that: include: The sewage system operation condition diagnosis and assessment method is used to determine whether the sewage well water source composition is normal or whether there is sewage mixing from other sources; to determine whether there is rainwater access to the sewage system and the extent of access; to determine whether there is river and lake water mixing in the sewage system and the extent of mixing; The determination of whether the water source composition of the sewage well is normal or whether there is other sewage mixed in includes: When only drought data is available, determine the water level of the sewage well under drought conditions, where the water level includes: normal water level and high water level; Under normal water levels, if the ammonia nitrogen concentration is greater than 10 mg / L, the sewage well water source composition is determined to be normal; if the ammonia nitrogen concentration is ≤10 mg / L, it is determined that the sewage well water source is mixed with other sewage sources, including: river and lake water, groundwater, and construction drainage; At high water levels, if the ammonia nitrogen concentration is >10 mg / L, the sewage well water source composition is judged to be normal; if the ammonia nitrogen concentration is ≤10 mg / L and there is no significant difference in water quality from the adjacent rainwater well water level, it is judged that there is rainwater and sewage mixing or connection; if the ammonia nitrogen concentration is ≤10 mg / L and there is a significant difference in water quality from the adjacent rainwater well water level and there is no significant difference in water quality from the terminal sewage treatment system, it is judged that the sewage well water source is mixed with other sewage sources, including: river and lake water, groundwater and construction drainage; if the ammonia nitrogen concentration is ≤10 mg / L and there is a significant difference in water quality from the adjacent rainwater well water level and there is a significant difference in water quality from the terminal sewage treatment system, it is judged that the sewage system is seriously sedimented; When both dry and rainy day data are available, samples are taken from the sewage well. If the change rate of the sampled TN concentration is greater than 20%, it is determined that rainwater may be connected to the sewage well water source. If the change rate of the sampled TN concentration is ≤20%, it is determined that the sewage well water source is normal. Determining whether the sewage system has rainwater access and the extent of access includes: Whether rainwater is connected can be determined based on the correlation between daily rainfall and the daily operating water volume of the sewage pumping station or sewage treatment plant; or, whether rainwater is connected can be determined based on the correlation between daily rainfall and the daily ammonia nitrogen concentration in the sewage pumping station or sewage treatment plant's influent; or, whether rainwater is connected can be determined based on a t-test analysis of weather data and daily influent volume data recorded by the sewage treatment plant or sewage pumping station; Determine the degree of rainwater access based on the daily water inflow to the sewage system under dry and rainy conditions; The diagnostic and evaluation method for the rainwater system operating conditions is used to determine whether the composition of the rainwater well water source is normal or whether there is other sewage sources mixed in; to determine whether there is sewage mixing misconnection in the rainwater system and the degree of misconnection; to determine the degree of external water mixing in the rainwater system; Pipeline network operation defect diagnosis and assessment method, used to diagnose and assess the probability of pipeline network operation defects; The plant-grid system operating condition diagnosis and evaluation method is used to diagnose and evaluate the system operating condition based on the principle of water volume and load balance of the plant-grid system; The plant-grid system compatibility diagnosis and evaluation method is used to evaluate the compatibility of the plant-grid system based on preset sewage treatment evaluation indicators.

2. The method for diagnosing and evaluating the operating conditions of a drainage pipe network system according to claim 1, characterized in that: The determination of whether river and lake water is mixed into the sewage system and the degree of mixing includes: Based on the comparison of concentrations in municipal pipelines, sewage pumping stations, sewage treatment plants, and surface water during dry weather, if the pumping station concentration / sewage treatment plant concentration is less than 1 / 2 of the average pipeline concentration, or the difference between the pumping station concentration and the surface water concentration is within 20%, it is determined that river and lake water may have entered the sewage system; The degree of mixing of river and lake water is calculated based on the water balance method and pollution load balance method.

3. The method for diagnosing and evaluating the operating conditions of a drainage pipe network system according to claim 1, characterized in that: The determination of whether the composition of the rainwater well water source is normal or whether there is other sewage mixed in includes: If there is no obvious water flow in the rainwater well during dry weather, the composition of the rainwater well is normal; If there is obvious water flow in the rainwater well on dry days and there is no obvious difference in water quality between the well and the adjacent sewage well, it is determined that there is rainwater and sewage connection; if there is a significant difference in water quality between the well and the adjacent sewage well, and the concentration of ammonia nitrogen pollutants is greater than 10 mg / L, it is determined that there is sewage mixing; if there is a significant difference in water quality between the well and the adjacent sewage well, and the concentration of ammonia nitrogen pollutants is ≤10 mg / L, and there is no significant difference in water quality between the well and the terminal rainwater system, it is determined that other sewage sources are mixed in, including: river and lake water, groundwater and construction drainage; if there is a significant difference in water quality between the well and the adjacent sewage well, and the concentration of ammonia nitrogen pollutants is ≤10 mg / L, and there is a significant difference in water quality between the well and the terminal rainwater system, it is determined that there is serious sedimentation in the rainwater system.

4. The method for diagnosing and evaluating the operating conditions of a drainage pipe network system according to claim 1, wherein: The determination of whether there is sewage mixing and misconnection in the rainwater system and the degree of mixing and misconnection includes: If there is a continuous flow of water at the end of the rainwater system during dry weather, and the water quality concentration is similar to that of the sewage system, it is determined that sewage is mixed or connected incorrectly. If there is a continuous flow of water at the end of the rainwater system during dry weather, and the water quality concentration is similar to that of surface water, it is determined that there is mixing of other sewage sources, including river and lake water, groundwater, and construction drainage. If there is no continuous flow of water at the end of the rainwater system during dry weather, it is determined that there is no mixing or connection in the rainwater system. If it is determined that sewage mixing and misconnection exists, the misconnection density or misconnection water volume ratio is used to characterize the degree of sewage mixing and misconnection; among which, the misconnection density is the ratio of the number of sewage mixing and misconnection points in the rainwater pipe to the total number of surveyed rainwater wells; the misconnection water volume ratio is the ratio of the total amount of sewage misconnection water in the rainwater system obtained from the survey to the total amount of sewage generated in the surveyed area.

5. The method for diagnosing and evaluating the operating conditions of the drainage pipe network system according to claim 4, characterized in that: The determination of the degree of mixing of external water into the rainwater system includes: For rainwater systems that discharge rainwater through rainwater pumping stations, the ratio of the water intake of the rainwater pumping station on dry days to the total volume of the rainwater pipeline is used to represent the degree of mixing of external water; for gravity discharge systems without rainwater pumping stations, the water storage capacity of the rainwater system on dry days divided by the total volume of the pipeline is used to represent the degree of mixing of external water; the external water includes: river and lake water, groundwater and construction drainage.

6. The method for diagnosing and evaluating the operating conditions of a drainage pipe network system according to claim 1, wherein: The diagnosis and evaluation of the system operating conditions based on the principle of water volume and load balance of the plant network system includes: Based on the instantaneous water volume and load balance relationship, the amount of sewage collected and the amount of external water mixed into the sewage system are calculated; Based on the diagnosis and evaluation of the long-term operation effect of the system, the long-term operation parameters of the plant network system are evaluated, and the long-term operation parameters include: annual overflow frequency, overflow volume, overflow pollution load and interception multiple.

7. The method for diagnosing and evaluating the operating conditions of a drainage pipe network system according to claim 1, characterized in that: The evaluation of the compatibility of the plant network system based on the preset sewage treatment evaluation indicators includes: Rapidly diagnose and evaluate the compatibility of the diversion system plant network based on the diagnostic and evaluation indicators of the diversion system plant network compatibility; Based on the diagnostic and evaluation indicators of the combined or interception system plant network matching, the combined or interception system plant network matching can be quickly diagnosed and evaluated.

8. A drainage network system operating condition diagnosis and evaluation system, characterized in that: include: The sewage system operation condition diagnosis and evaluation system is used to determine whether the sewage well water source composition is normal or whether there is sewage mixing from other sources; to determine whether there is rainwater access to the sewage system and the extent of access; to determine whether there is river and lake water mixing in the sewage system and the extent of mixing; The determination of whether the water source composition of the sewage well is normal or whether there is other sewage mixed in includes: When only drought data is available, determine the water level of the sewage well under drought conditions, where the water level includes: normal water level and high water level; Under normal water levels, if the ammonia nitrogen concentration is greater than 10 mg / L, the sewage well water source composition is determined to be normal; if the ammonia nitrogen concentration is ≤10 mg / L, it is determined that the sewage well water source is mixed with other sewage sources, including: river and lake water, groundwater, and construction drainage; At high water levels, if the ammonia nitrogen concentration is >10 mg / L, the sewage well water source composition is judged to be normal; if the ammonia nitrogen concentration is ≤10 mg / L and there is no significant difference in water quality from the adjacent rainwater well water level, it is judged that there is rainwater and sewage mixing or connection; if the ammonia nitrogen concentration is ≤10 mg / L and there is a significant difference in water quality from the adjacent rainwater well water level and there is no significant difference in water quality from the terminal sewage treatment system, it is judged that the sewage well water source is mixed with other sewage sources, including: river and lake water, groundwater and construction drainage; if the ammonia nitrogen concentration is ≤10 mg / L and there is a significant difference in water quality from the adjacent rainwater well water level and there is a significant difference in water quality from the terminal sewage treatment system, it is judged that the sewage system is seriously sedimented; When both dry and rainy day data are available, samples are taken from the sewage well. If the change rate of the sampled TN concentration is greater than 20%, it is determined that rainwater may be connected to the sewage well water source. If the change rate of the sampled TN concentration is ≤20%, it is determined that the sewage well water source is normal. Determining whether the sewage system has rainwater access and the extent of access includes: Whether rainwater is connected can be determined based on the correlation between daily rainfall and the daily operating water volume of the sewage pumping station or sewage treatment plant; or, whether rainwater is connected can be determined based on the correlation between daily rainfall and the daily ammonia nitrogen concentration in the sewage pumping station or sewage treatment plant's influent; or, whether rainwater is connected can be determined based on a t-test analysis of weather data and daily influent volume data recorded by the sewage treatment plant or sewage pumping station; Determine the degree of rainwater access based on the daily water inflow to the sewage system under dry and rainy conditions; The rainwater system operation condition diagnosis and evaluation system is used to determine whether the composition of the rainwater well water source is normal or whether there is other sewage sources mixed in; to determine whether there is sewage mixing misconnection in the rainwater system and the degree of misconnection; to determine the degree of external water mixing in the rainwater system; Pipeline network operation defect diagnosis and assessment system, used to diagnose and assess the probability of pipeline network operation defects; The plant-grid system operating condition diagnosis and evaluation system is used to diagnose and evaluate the system operating conditions based on the principle of water volume and load balance of the plant-grid system; The plant-network system compatibility diagnosis and evaluation system is used to evaluate the compatibility of the plant-network system based on preset sewage treatment evaluation indicators.

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