Water quantity and water quality coupling calculation method for drainage pipe network model and sewage treatment plant model

Abstract

The invention discloses a water quantity and water quality coupling calculation method for a drainage pipe network model and a sewage treatment plant model. The method comprises the following steps: step 1, constructing the drainage pipe network model; 2, constructing a sewage treatment plant model; 3, respectively building single model simulators of the drainage pipe network and the sewage treatment plant by using the model engine, wherein the simulators have interface functions to support data exchange; 4, the sewage treatment plant model and the drainage pipe network model are taken as a main engine and a branch engine respectively, and the main engine provides an expansion interface function and performs data interaction and cooperative operation with the branch engine; and 5, establishing a coupling simulator. The method can optimize operation management of a sewage treatment plant, reduce system operation cost, improve sewage treatment efficiency and reduce pollutant discharge. Through dynamic response and real-time monitoring, sewage overflow in the rainy season is prevented, the sewage collection capacity and pollutant concentration of the system are improved, and a quantitative management tool is provided for operation and maintenance of a drainage pipe network and a sewage treatment plant.

Description

Technical Field

[0001] The invention belongs to the field of municipal engineering, and in particular relates to a water quantity and water quality coupling calculation method of a drainage pipe network model and a sewage treatment plant model. Background Art

[0002] With the rapid advancement of information technology, sewage treatment plant models are playing an increasingly important role in promoting efficient operation and intelligent management. Such models provide strong technical support for the planning, design, construction and daily operation of sewage treatment plants by simulating the physical, chemical and biological processes of sewage treatment. In the design stage, the model not only helps engineers make more scientific and reasonable decisions on process selection, equipment configuration and parameter optimization, ensuring the economy and practicality of the design scheme; in the operation stage, the model can also monitor and adjust key operating parameters such as aeration, dosing and sludge age in real time through advanced intelligent control systems, ensuring that the sewage treatment plant can maintain efficient and stable operation under various working conditions.

[0003] In my country, the arrival of the rainy season is often accompanied by heavy rainfall and the widespread existence of combined sewer systems, which leads to the mixed flow of rainwater and sewage, which puts great operating pressure on sewage treatment plants. This impact is not only reflected in the rapid increase in water inflow, but may also cause water quality deterioration, posing a threat to the stable operation of sewage treatment plants. In order to meet this challenge, it is particularly important to realize the coupling calculation of the drainage network model and the sewage treatment plant model. Summary of the invention

[0004] Aiming at the limitations of the existing technology in the operation and management of sewage treatment plants in the rainy season, especially the shortcomings in the treatment of water quantity and water quality fluctuations, the present invention proposes a method for coupling the calculation of water quantity and water quality between the drainage network model and the sewage treatment plant model. The method can optimize the operation and management of sewage treatment plants, reduce system operation costs, improve sewage treatment efficiency, and reduce pollutant emissions. Through dynamic response and real-time monitoring, it can prevent sewage overflow in the rainy season, improve the sewage collection capacity and pollutant concentration of the system, and provide a quantitative management tool for the operation and maintenance of drainage networks and sewage treatment plants.

[0005] To achieve the above object, the present invention proposes a method for calculating the water quantity and water quality of a drainage network model and a sewage treatment plant model, which is characterized by comprising the following steps:

[0006] Step 1: Construct a drainage network model to describe the topological structure, hydraulic characteristics and pollutant migration process of the network;

[0007] Step 2: Construct a sewage treatment plant model to describe the process flow, equipment parameters and water quality change process of the sewage treatment plant;

[0008] Step 3: Using the model engine, a single model simulator of the drainage network and the sewage treatment plant is constructed respectively, wherein the simulator has an interface function to support data exchange;

[0009] Step 4: The sewage treatment plant model and the drainage network model are used as the main engine and the branch engine respectively. The main engine provides an extended interface function to perform data interaction and collaborative calculation with the branch engine.

[0010] Step 5: Build a coupling simulator to realize comprehensive simulation of water quantity and quality of the drainage network and sewage treatment plant.

[0011] Preferably, the step 1 of constructing a drainage network model includes:

[0012] Collect driving data, drainage network asset data, land use type, terrain elevation, build the spatial topological relationship of the drainage system, sort out the upstream and downstream relationships of the network system within the drainage network service range of the sewage treatment plant, debug the model and conduct preliminary operation, monitoring and calibration, and form a verified drainage network model.

[0013] Preferably, the step 2 of constructing a sewage treatment plant model comprises:

[0014] Collect process descriptions, facility design parameters, influent and effluent water volume and quality data for more than half a year, operation data of each facility during stable operation, build upstream and downstream relationships of each facility, configure basic facility parameters and operation parameters, debug the model and initially operate it, calibrate model parameters using long-term influent and effluent and operation data, and form a calibrated sewage treatment plant model.

[0015] Preferably, the specific steps of step 3 are: opening the simulator (configuring model parameters), starting simulation and verifying each model parameter, simulating step by step until the simulation ends, and closing the simulator after the simulation ends.

[0016] Preferably, the specific steps of step 4 are: setting external inflow, setting external water quality load, and the branch engine provides an extended interface function including obtaining node outflow and outflow load.

[0017] Preferably, the specific steps of step 5 are: during the step-by-step simulation process, the main engine sewage treatment plant model uses the branch engine drainage network model to obtain the outflow and load data of the end nodes of the sewage treatment plant service range, and configures these data in the main engine using the extended interface function.

[0018] The beneficial effects of the present invention are:

[0019] 1. The present invention uses a model engine to build simulators for the drainage network and sewage treatment plant respectively, and realizes data exchange and collaborative calculation through interface functions to construct a comprehensive coupling simulator. Through coupling calculation, the generation, transmission and collection process of rainwater and sewage mixed flow in the drainage network can be accurately simulated, and the changing trend of water flow and water quality of the sewage treatment plant can be accurately predicted. In addition, coupling calculation can also help optimize the control strategy of CSO (combined sewer system sewage overflow), reduce the direct discharge of sewage to the environment, and improve the overall quality of the urban water environment.

[0020] 2. The present invention is based on predicting the changing trends of the inflow volume and water quality of the sewage treatment plant, and can adjust the operating parameters in advance, such as increasing the aeration volume, adjusting the dosage, etc., to effectively cope with the increase in inflow volume and the deterioration of water quality.

[0021] 3. The model engine described in the present invention is a computing engine that can handle large-scale complex systems and supports parallel computing and dynamic data exchange.

[0022] 4. The coupling simulator described in the present invention can monitor and predict the dynamic changes of water quantity and quality in the drainage network and sewage treatment plant in real time.

[0023] 5. The present invention can provide real-time decision support in the event of sudden pollution incidents and optimize the operation and management strategy of the sewage treatment plant.

[0024] 6. The present invention can reduce energy consumption and chemical usage in sewage treatment plants and lower operating costs.

[0025] 7. The present invention can improve the treatment efficiency of sewage treatment plants, reduce the discharge of pollutants in sewage, and improve the water quality of receiving water bodies.

[0026] 8. The present invention has strong adaptability and operability and is suitable for drainage systems and sewage treatment plants of different sizes and types. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a work flow chart of the present invention. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with specific examples. The examples only express one embodiment of the present application, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present application. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be based on the attached claims.

[0029] The present invention proposes a method for calculating the water quantity and water quality of a drainage network model and a sewage treatment plant model in a coupled manner. The implementation process includes:

[0030] S1: Construct a drainage network model. Based on the topological structure of the actual drainage network, pipeline characteristics (pipeline length, diameter, slope, roughness coefficient) and hydraulic parameters, establish a drainage network model to describe the transportation, collection and migration of water and pollutants in the network. Specifically, collect driving data (rainfall, dry season inflow, inflow and infiltration), drainage network asset data, land use type, terrain elevation, construct the spatial topological relationship of the drainage system, sort out the upstream and downstream relationships of the network system within the service range of the sewage treatment plant's drainage network, debug the model and initially run it, monitor and calibrate it, and form a verified drainage network model.

[0031] S2: Construct a sewage treatment plant model. According to the process flow, equipment parameters, treatment capacity and water quality change characteristics of the sewage treatment plant, establish a sewage treatment plant model to describe the water balance and water quality change process of sewage in each treatment unit. Specifically: collect process description (process flow, facility description), facility design parameters (size, sludge return volume, residual sludge discharge volume, mixed liquor return volume, dosage, etc.), more than half a year of influent and effluent water volume and quality data, stable operation of each facility operation data, build upstream and downstream correlations of each facility, configure basic parameters and operation parameters of the facility, debug the model and initially operate it, and use long-term influent and effluent and operation data to calibrate model parameters to form a calibrated sewage treatment plant model.

[0032] S3: Use the model engine to build a single model simulator for the drainage network and the sewage treatment plant respectively. The simulator has an interface function to support data exchange. Use the model engine technology to build a drainage network model simulator and a sewage treatment plant model simulator respectively. The simulator has an interface function and can exchange data and coordinate calculations with other models or systems. Specifically: open the simulator (configure model parameters), start simulation and verify each model parameter, simulate step by step until the simulation ends, and end the simulation and close the simulator.

[0033] S4: The sewage treatment plant model and the drainage network model are used as the main engine and branch engine respectively. The main engine provides extended interface functions to interact with the branch engine for data and collaborative operations. Specifically, when performing coupled calculations, the sewage treatment plant model or the drainage network model is selected as the main engine according to specific needs, and the other model is used as the branch engine. The main engine provides extended interface functions to interact with the branch engine for data and collaborative operations to achieve model linkage and coordination.

[0034] S5: On the basis of the above, a comprehensive coupling simulator is built. During the step-by-step simulation of the main engine (sewage treatment plant model), the branch engine (drainage network model) is used to obtain the outflow and load data of the end nodes in the service range of the sewage treatment plant, and these data are configured in the main engine using the extended interface function. The simulator can simultaneously process the water quantity and quality information of the drainage network and the sewage treatment plant, realize the coupling calculation between the two, and provide accurate and real-time overall system simulation results.

[0035] The present invention improves the accuracy and reliability of the overall system simulation by comprehensively simulating the changes in water quantity and quality of the drainage system and the treatment system, which helps to optimize the operation and management of the sewage treatment plant and reduce the operating costs. At the same time, the method enhances the dynamic response capability of the system, provides timely decision-making support for responding to sudden pollution incidents, further improves the efficiency of sewage treatment, reduces pollutant emissions, and improves environmental quality. This technology has strong adaptability and operability, is suitable for drainage systems and sewage treatment plants of different sizes and types, and has broad application prospects and social benefits.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for coupling water quantity and water quality calculation between a drainage network model and a sewage treatment plant model, characterized in that: The steps include: Step 1: Construct a drainage network model to describe the topological structure, hydraulic characteristics and pollutant migration process of the network; Step 2: Construct a sewage treatment plant model to describe the process flow, equipment parameters and water quality change process of the sewage treatment plant; Step 3: Using the model engine, a single model simulator of the drainage network and the sewage treatment plant is constructed respectively, wherein the simulator has an interface function to support data exchange; Step 4: The sewage treatment plant model and the drainage network model are used as the main engine and the branch engine respectively. The main engine provides an extended interface function to perform data interaction and collaborative calculation with the branch engine. Step 5: Build a coupling simulator.

2. The method for coupling water quantity and water quality calculation of a drainage network model and a sewage treatment plant model according to claim 1 is characterized by: The step 1 constructs a drainage network model, including: collecting driving data, drainage network asset data, land use type, terrain elevation, constructing the spatial topological relationship of the drainage system, sorting out the upstream and downstream relationships of the network system within the drainage network service range of the sewage treatment plant, debugging the model and performing preliminary operation, monitoring and calibration, and forming a verified drainage network model.

3. The method for coupling water quantity and water quality calculation of a drainage network model and a sewage treatment plant model according to claim 1 is characterized by: The step 2 constructs a sewage treatment plant model, including: collecting process descriptions, facility design parameters, influent and effluent water volume and quality data for more than half a year, operation data of each facility during stable operation, building upstream and downstream relationships of each facility, configuring basic parameters and operation parameters of the facility, model debugging and preliminary operation, and calibrating model parameters using long-term influent and effluent and operation data to form a calibrated sewage treatment plant model.

4. The method for calculating the water quantity and water quality of a drainage network model and a sewage treatment plant model coupled with each other according to claim 1, characterized in that: The specific steps of step 3 are: opening the simulator (configuring model parameters), starting simulation and verifying each model parameter, simulating step by step until the simulation ends, and then closing the simulator after the simulation ends.

5. The method for coupling water quantity and water quality calculation of a drainage network model and a sewage treatment plant model according to claim 1 is characterized by: The specific steps of step 4 are: setting external inflow, setting external water quality load, and the branch engine provides an extended interface function including obtaining node outflow and outflow load.

6. The method for calculating the water quantity and water quality of a drainage network model and a sewage treatment plant model coupled with each other according to claim 1, characterized in that: The specific steps of step 5 are: during the step-by-step simulation process, the main engine sewage treatment plant model uses the branch engine drainage network model to obtain the outflow and load data of the end nodes of the sewage treatment plant service range, and configures these data in the main engine using the extended interface function.

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