CN116013050B - Sewage monitoring and early warning method for urban underground sewage disposal system - Google Patents
Sewage monitoring and early warning method for urban underground sewage disposal system Download PDFInfo
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Abstract
The invention discloses a sewage monitoring and early warning method of an urban underground sewage disposal system, and belongs to the technical field of water quality monitoring. The sewage monitoring and early warning method of the urban underground sewage drainage system comprises the steps of obtaining urban underground sewage drainage pipeline information, and constructing a physical model of the urban underground sewage drainage pipeline system according to the urban underground sewage drainage pipeline information; acquiring emission data of the urban sewage source, and acquiring sewage state data based on the urban underground sewage piping physical model and the emission data of the urban sewage source; obtaining sewage intersection information based on a physical model of the urban underground sewage drainage pipeline system by utilizing sewage state data; generating a pollutant derivative trend by utilizing sewage intersection information; and obtaining urban underground sewage water quality monitoring and early warning information according to the derivative trend of the pollutants. The early warning information obtained by the method can be used as guiding information for avoiding the generation of derivatives, can be used for guiding the time period of sewage discharge of pollution sources, and can be used for providing assistance for sewage management of urban underground sewage drainage systems.
Description
Technical Field
The invention belongs to the technical field of water quality monitoring, and particularly relates to a sewage monitoring and early warning method of an urban underground sewage disposal system.
Background
In the sewage management of an urban underground sewage disposal system, the discharge sources comprise industrial wastewater, agricultural wastewater, domestic wastewater, natural pollutants and the like which reach the standard, various sewage can be collected in an urban underground sewage disposal pipeline, and various biochemical substances can be collected and reacted in the underground pipeline. The derived irritant gas, sediment and new pollutants respectively bring adverse effects to the surrounding environment of the underground sewage system, the blockage of a sewage pipeline and a sewage treatment terminal. The sewage management difficulty of the urban underground sewage system is high, and in order to avoid the sewage management threat of the urban underground sewage system derived after various pollutants are collected and improve the treatment effect of urban underground sewage, the sewage monitoring and early warning method of the urban underground sewage system is provided for early warning the normal operation of the underground sewage system.
Disclosure of Invention
The invention aims to: the sewage monitoring and early warning method for the urban underground sewage drainage system is provided to solve the problems existing in the prior art.
The technical scheme is as follows: a sewage monitoring and early warning method of an urban underground sewage disposal system comprises the following steps:
acquiring urban underground sewage pipeline information, and constructing an urban underground sewage pipeline system physical model according to the urban underground sewage pipeline information;
acquiring emission data of the urban sewage source, and acquiring sewage state data based on the urban underground sewage piping physical model and the emission data of the urban sewage source;
obtaining sewage intersection information based on a physical model of the urban underground sewage drainage pipeline system by utilizing sewage state data;
generating a pollutant derivative trend by utilizing sewage intersection information;
and obtaining urban underground sewage water quality monitoring and early warning information according to the derivative trend of the pollutants.
Further, the urban underground sewage pipeline information comprises the route distribution information of the urban underground sewage pipeline, the allowable maximum flow of the pipeline and the gradient of the sewage pipeline;
the emission data of the urban pollution discharge source comprises pollution discharge source position information, pollution discharge component information, pollution discharge amount, pollution discharge speed and planned pollution discharge time.
Further, obtaining sewage status data based on the urban underground sewage piping physical model and the emission data of the urban sewage source includes:
obtaining a sewage power data model based on an urban underground sewage drainage piping physical model by utilizing the discharge data of the urban sewage drainage source;
obtaining sewage state data corresponding to the emission data of different urban pollution discharge sources by using a sewage power data model;
the sewage state data comprise position data, flow velocity data, sewage components and content data corresponding to the discharge data of the urban sewage source in the urban underground sewage piping physical model at any time node.
Further, the obtaining of the sewage power data model based on the physical model of the urban underground sewage piping by utilizing the emission data of the urban sewage source comprises the following steps:
obtaining sample data based on a physical model of an urban underground sewage drainage system by utilizing the emission data of an urban sewage drainage source;
constructing a sewage power data initial model by using sample data;
obtaining measured data corresponding to sample data;
and optimizing and adjusting the physical model of the underground sewage drainage pipeline system by utilizing the difference value of the sample data and the measured data to obtain a sewage dynamic data model.
Further, obtaining sewage intersection information based on the urban underground sewage drainage piping physical model by using the sewage status data comprises:
acquiring the overlapped discharge duration of each branch sewage of the urban underground sewage drainage pipeline physical model;
obtaining the sewage quantity of each branch participating in merging according to the overlapped discharge duration of the sewage of each branch and the flow rate data of the sewage state data;
obtaining the pollution components and the content of each branch participating in the merging according to the sewage quantity of each branch participating in the merging and the emission data of the urban sewage source;
and taking the overlapped discharge duration of the sewage of each branch, the sewage quantity of each branch and the pollution components and the contents of the branches participating in the confluence as sewage intersection information.
Further, the step of obtaining the overlapped discharge duration of each branch sewage of the physical model of the urban underground sewage drainage pipeline comprises the following steps:
obtaining the flowing time period of each branch sewage flowing through each junction in the urban underground sewage drainage pipeline physical model by using the sewage state data;
and (3) intersecting the flowing time periods of the tributary sewage upstream of the confluence points to obtain the overlapped discharge duration of the confluence points.
Further, utilizing the wastewater intersection information and wastewater status data to derive trends for the contaminants includes:
obtaining the reaction time of the derivative according to the physical model of the urban underground sewage drainage system and the flow rate data of the sewage state data;
the type and the content of the derivative are obtained by utilizing the pollution components, the content of each branch and the reaction duration of the derivative, which participate in the confluence in the sewage intersection information based on a chemical reaction database;
the type and content of the derivative are used to obtain a contaminant derivative trend.
Further, deriving the contaminant derivative trend using the type and content of the derivative includes:
if the type of the derivative is gas, judging whether the content of the derivative exceeds a gas pressure threshold, if so, the pollutant derivative trend is a gas pressure dangerous trend, otherwise, the pollutant derivative trend is a gas pressure safety trend;
if the type of the derivative is nontoxic gas and the content of the derivative does not exceed the air pressure threshold value, the derivative trend of the pollutant is a gas safety trend;
otherwise, judging whether the content of the derivative exceeds a toxicity safety threshold, if so, the pollutant derivative trend is a toxicity dangerous trend, otherwise, the pollutant derivative trend is a toxicity risk trend;
if the type of the derivative is sediment, the settlement of the sediment is obtained according to the flow rate data of the sewage state data and the content of the derivative, whether the settlement of the sediment is larger than a settlement blocking threshold value is judged, if yes, the derivative trend of the pollutant is a settlement blocking trend, and if not, the derivative trend of the pollutant is a blocking backward trend.
Further, the method for obtaining urban underground sewage quality monitoring and early warning information according to the derivative trend of the pollutants comprises the following steps:
if the derived trend of the pollutants is a dangerous trend of air pressure, the pollution discharge water quality monitoring and early warning information is pressure early warning;
if the pollutant derivative trend is a toxicity risk trend or a toxicity risk trend, the pollution discharge water quality monitoring and early warning information is a dangerous gas toxicity early warning;
and if the pollutant derivative trend is a sedimentation blocking trend, the sewage quality monitoring and early warning information is sedimentation blocking early warning.
The beneficial effects are that: according to the invention, urban underground sewage pipeline information is utilized to construct an urban underground sewage pipeline physical model, the discharge data of urban sewage sources are superposed on the urban underground sewage pipeline physical model to obtain a sewage power data model, the collection condition of the sewage of each pollution source is simulated, a chemical reaction database is called to obtain the types and the contents of derivatives, and early warning information is sent out according to the threat of the derivative multi-urban underground sewage system, and can be used as guiding information for avoiding the generation of the derivatives to guide the sewage discharge time period of the pollution sources, so that assistance is provided for sewage management of the urban underground sewage system, and the treatment effect of urban underground sewage is improved.
Drawings
Fig. 1 is a step diagram of a prediction method in the present invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the invention.
Example 1: in order to realize the early warning of derived pollutants generated by converging various pollutants in an urban low-level sewage drainage system, a sewage monitoring and early warning method of an urban underground sewage drainage system is provided, as shown in fig. 1, the early warning method comprises the following steps:
step 1: acquiring urban underground sewage pipeline information, and constructing an urban underground sewage pipeline system physical model according to the urban underground sewage pipeline information; the urban underground sewage pipeline information comprises the route distribution information of the urban underground sewage pipeline, the allowable maximum flow of the pipeline and the gradient of the sewage pipeline.
Step 2: acquiring emission data of the urban sewage source, and acquiring sewage state data based on the urban underground sewage piping physical model and the emission data of the urban sewage source; the emission data of the urban pollution discharge source comprises pollution discharge source position information, pollution discharge component information, pollution discharge amount, pollution discharge speed and planned pollution discharge time.
Step 3: and obtaining sewage intersection information based on the urban underground sewage drainage pipeline physical model by utilizing the sewage state data.
Step 4: and generating a pollutant derivative trend by utilizing the sewage intersection information.
Step 5: and obtaining urban underground sewage water quality monitoring and early warning information according to the derivative trend of the pollutants.
In the embodiment, the urban sewage source mainly comprises an industrial end, an agricultural end and a resident end;
the factories in the industrial area are adjacently arranged, so that the pollution discharge amount is large, the pollution discharge composition is complex, and the method belongs to a key detection early warning area;
the agricultural terminal has obvious periodic characteristics according to the ingredient use of the agricultural compound with the cultivation characteristics, and belongs to seasonal key detection early warning areas;
the pollution discharge type of the residential terminal is mainly grease pollutants, the daily emission data is stable, the emission data of a fixed urban pollution discharge source can be selected, the data statistics is not needed to be carried out on each emission time like the industrial terminal and the agricultural terminal, and the emission data of the residential terminal is updated periodically.
The step 2 specifically comprises the following steps:
step 21: obtaining a sewage power data model based on an urban underground sewage drainage piping physical model by utilizing the discharge data of the urban sewage drainage source;
step 22: obtaining sewage state data corresponding to the emission data of different urban pollution discharge sources by using a sewage power data model;
the sewage state data comprise position data, flow velocity data, sewage components and content data corresponding to the discharge data of the urban sewage source in the urban underground sewage piping physical model at any time node.
The step 21 specifically includes:
step 211: obtaining sample data based on a physical model of an urban underground sewage drainage system by utilizing the emission data of an urban sewage drainage source;
step 212: constructing a sewage power data initial model by using sample data;
step 213: obtaining measured data corresponding to sample data;
step 214: optimizing and adjusting the physical model of the underground sewage drainage pipeline system by utilizing the difference value between the sample data and the measured data to obtain a sewage dynamic data model;
the measured data for optimizing the urban underground sewage drainage pipeline system physical model comprises the flow and the flow of a rapid section of sewage, the gradient and the pipeline diameter corresponding to the actual measurement point of the underground sewage drainage pipeline system physical model can be obtained through the measured data, and the new gradient and the pipeline diameter are brought into the underground sewage drainage pipeline system physical model, so that a more accurate model is obtained.
The step 3 specifically comprises the following steps:
step 31: acquiring the overlapped discharge duration of each branch sewage of the urban underground sewage drainage pipeline physical model;
step 32: obtaining the sewage quantity of each branch participating in merging according to the overlapped discharge duration of the sewage of each branch and the flow rate data of the sewage state data;
step 33: obtaining the pollution components and the content of each branch participating in the merging according to the sewage quantity of each branch participating in the merging and the emission data of the urban sewage source;
step 34: and taking the overlapped discharge duration of the sewage of each branch, the sewage quantity of each branch and the pollution components and the contents of the branches participating in the confluence as sewage intersection information.
The step 31 specifically includes:
step 311: obtaining the flowing time period of each branch sewage flowing through each junction in the urban underground sewage drainage pipeline physical model by using the sewage state data; the sewage state data can reflect the position data of the physical model of the sewage in the urban underground sewage drainage pipeline system at any time from the sewage discharge meter of the pollution source, the time from the front end of the sewage to the junction point is the starting point of the flowing-through period, and the time from the tail end of the sewage to the junction point is the ending point of the flowing-through period.
Step 312: and (3) intersecting the flowing time periods of the tributary sewage upstream of the confluence points to obtain the overlapped discharge duration of the confluence points.
The step 4 specifically comprises the following steps:
step 41: obtaining the reaction time of the derivative according to the physical model of the urban underground sewage drainage system and the flow rate data of the sewage state data;
step 42: the type and the content of the derivative are obtained by utilizing the pollution components, the content of each branch and the reaction duration of the derivative, which participate in the confluence in the sewage intersection information based on a chemical reaction database; the reaction environment input by the chemical reaction database is the environment of the urban underground sewage disposal system, and the environment of the urban underground sewage disposal system is related to seasons.
Step 43: the type and content of the derivative are used to obtain a contaminant derivative trend.
Step 43 specifically includes:
if the type of the derivative is gas, judging whether the content of the derivative exceeds a gas pressure threshold, if so, the pollutant derivative trend is a gas pressure dangerous trend, otherwise, the pollutant derivative trend is a gas pressure safety trend; preferably, the air pressure threshold is a standard atmospheric pressure, when the air pressure in the fully loaded pipeline changes, the water flow rate is not changed, and the water hammer phenomenon can occur at the turning position of the pipeline, so that the damage of the urban underground sewage disposal system is accelerated.
If the type of the derivative is nontoxic gas and the content of the derivative does not exceed the air pressure threshold value, the derivative trend of the pollutant is a gas safety trend;
otherwise, judging whether the content of the derivative exceeds a toxicity safety threshold, if so, the pollutant derivative trend is a toxicity dangerous trend, otherwise, the pollutant derivative trend is a toxicity risk trend; the toxicity safety threshold is set to 60% of the maximum value of the toxic gas borne by the human body, and the toxicity safety threshold is set to be lower than the human body bearing value in order to avoid the influence of personnel working nearby the urban underground sewage system for a long time although the urban underground sewage system is an urban infrastructure communicated with the atmospheric environment.
If the type of the derivative is a sediment, obtaining the settlement of the sediment according to the flow rate data of the sewage state data and the content of the derivative, judging whether the settlement of the sediment is larger than a settlement blocking threshold, if so, the derivative trend of the pollutant is a settlement blocking trend, otherwise, the derivative trend of the pollutant is a blocking backward trend; wherein the sediment comprises flocculent gel, solid particles and supersaturated crystals; preferably, the settlement blocking threshold is the settlement amount of one fifth of the cross section area of the sediment blocking sewage pipeline, and the normal operation of the urban underground sewage system can be influenced by the excessive settlement amount, so that the sewage blocking risk is increased, and the urban siltation risk exists.
The step 5 specifically comprises the following steps:
if the derived trend of the pollutants is a dangerous trend of air pressure, the pollution discharge water quality monitoring and early warning information is pressure early warning;
if the pollutant derivative trend is a toxicity risk trend or a toxicity risk trend, the pollution discharge water quality monitoring and early warning information is a dangerous gas toxicity early warning;
and if the pollutant derivative trend is a sedimentation blocking trend, the sewage quality monitoring and early warning information is sedimentation blocking early warning.
Example 2: based on the early warning method provided in embodiment 1, when the early warning information is one of pressure early warning, dangerous gas toxicity early warning and sedimentation blocking early warning for the acquired emission data of the urban sewage source, the safe sewage drainage mode (sewage drainage time starting point and sewage drainage speed) can be fed back for the emission data of the urban sewage source, so that the generation of harmful derivatives is avoided, and the running risk of the urban underground sewage drainage system is further reduced.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various equivalent changes can be made to the technical solutions of the present invention within the scope of the technical concept of the present invention, and all such equivalent changes belong to the scope of the present invention.
Claims (3)
1. A sewage monitoring and early warning method of an urban underground sewage disposal system is characterized by comprising the following steps:
acquiring urban underground sewage pipeline information, and constructing an urban underground sewage pipeline system physical model according to the urban underground sewage pipeline information;
acquiring emission data of the urban sewage source, and acquiring sewage state data based on the urban underground sewage piping physical model and the emission data of the urban sewage source;
obtaining sewage intersection information based on a physical model of the urban underground sewage drainage pipeline system by utilizing sewage state data;
generating a pollutant derivative trend by utilizing sewage intersection information;
obtaining urban underground sewage quality monitoring and early warning information according to the derivative trend of the pollutants;
the urban underground sewage pipeline information comprises the route distribution information of the urban underground sewage pipeline, the allowable maximum flow of the pipeline and the gradient of the sewage pipeline;
the emission data of the urban pollution discharge source comprises pollution discharge source position information, pollution discharge component information, pollution discharge amount, pollution discharge speed and planned pollution discharge time;
obtaining sewage status data based on the urban underground sewage piping physical model and the emission data of the urban sewage source comprises:
obtaining a sewage power data model based on an urban underground sewage drainage piping physical model by utilizing the discharge data of the urban sewage drainage source;
obtaining sewage state data corresponding to the emission data of different urban pollution discharge sources by using a sewage power data model;
the sewage state data comprise position data, flow velocity data, sewage components and content data corresponding to the discharge data of the urban sewage source in the urban underground sewage piping physical model at any time node;
the obtaining of the sewage power data model based on the physical model of the urban underground sewage piping by utilizing the emission data of the urban sewage source comprises the following steps:
obtaining sample data based on a physical model of an urban underground sewage drainage system by utilizing the emission data of an urban sewage drainage source;
constructing a sewage power data initial model by using sample data;
obtaining measured data corresponding to sample data;
optimizing and adjusting the physical model of the underground sewage drainage pipeline system by utilizing the difference value between the sample data and the measured data to obtain a sewage dynamic data model;
the obtaining sewage intersection information based on the urban underground sewage drainage piping physical model by utilizing the sewage state data comprises the following steps:
acquiring the overlapped discharge duration of each branch sewage of the urban underground sewage drainage pipeline physical model;
obtaining the sewage quantity of each branch participating in merging according to the overlapped discharge duration of the sewage of each branch and the flow rate data of the sewage state data;
obtaining the pollution components and the content of each branch participating in the merging according to the sewage quantity of each branch participating in the merging and the emission data of the urban sewage source;
the overlapping discharge duration of the sewage of each branch, the sewage quantity of each branch and the pollution components of each branch participating in the confluence are used as sewage intersection information;
the method for obtaining the overlapped discharge duration of each tributary sewage of the urban underground sewage drainage pipeline physical model comprises the following steps:
obtaining the flowing time period of each branch sewage flowing through each junction in the urban underground sewage drainage pipeline physical model by using the sewage state data;
intersection is obtained for the flowing period of the upstream tributary sewage of each junction point, and the overlapping discharge duration of each junction point is obtained;
generating contaminant derivative trends using sewage intersection information includes:
obtaining the reaction time of the derivative according to the physical model of the urban underground sewage drainage system and the flow rate data of the sewage state data;
the type and the content of the derivative are obtained by utilizing the pollution components, the content of each branch and the reaction duration of the derivative, which participate in the confluence in the sewage intersection information based on a chemical reaction database;
the type and content of the derivative are used to obtain a contaminant derivative trend.
2. The method for monitoring and pre-warning sewage of an urban underground sewage system according to claim 1, wherein the step of obtaining the derivative trend of the pollutant by using the type and the content of the derivative comprises the steps of:
if the type of the derivative is gas, judging whether the content of the derivative exceeds a gas pressure threshold, if so, the pollutant derivative trend is a gas pressure dangerous trend, otherwise, the pollutant derivative trend is a gas pressure safety trend;
if the type of the derivative is nontoxic gas and the content of the derivative does not exceed the air pressure threshold value, the derivative trend of the pollutant is a gas safety trend; otherwise, judging whether the content of the derivative exceeds a toxicity safety threshold, if so, the pollutant derivative trend is a toxicity dangerous trend, otherwise, the pollutant derivative trend is a toxicity dangerous trend;
if the type of the derivative is sediment, the settlement of the sediment is obtained according to the flow rate data of the sewage state data and the content of the derivative, whether the settlement of the sediment is larger than a settlement blocking threshold value is judged, if yes, the derivative trend of the pollutant is a settlement blocking trend, and if not, the derivative trend of the pollutant is a blocking backward trend.
3. The method for monitoring and pre-warning sewage of an urban underground sewage system according to claim 2, wherein obtaining urban underground sewage water quality monitoring and pre-warning information according to the derivative trend of the pollutants comprises:
if the derived trend of the pollutants is a dangerous trend of air pressure, the pollution discharge water quality monitoring and early warning information is pressure early warning;
if the pollutant derivative trend is a toxicity risk trend or a toxicity risk trend, the pollution discharge water quality monitoring and early warning information is a dangerous gas toxicity early warning;
and if the pollutant derivative trend is a sedimentation blocking trend, the sewage quality monitoring and early warning information is sedimentation blocking early warning.
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