Centralized control method and device for village and town sewage treatment plants, electronic equipment and medium

Abstract

The invention provides a centralized control method and device for village and town sewage treatment plants, electronic equipment and a medium. The centralized control method comprises the steps that operation data of process equipment of multiple village and town sewage treatment plants and monitoring data of monitoring instruments are collected in real time through a PLC system; the collected operation data and monitoring data are transmitted to a centralized control center in real time through a network transmission layer formed by special lines of operators; in the centralized control center, the operation data and the monitoring data are received through an SCADA system, and the data are integrated and analyzed; when the production operation parameters are found to be abnormal based on analysis, a control instruction is sent to the PLC system from the centralized control center through the network transmission layer; and executing the control instruction through the PLC system so as to adjust the operation parameters of the process equipment. In the mode, the real-time centralized monitoring, remote intelligent scheduling and collaborative optimization management of each dispersed plant station are realized, the manpower dependence and the operation cost are obviously reduced, and the stable standard reaching of the effluent quality is effectively ensured.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a centralized control method, device, electronic equipment, and medium for township wastewater treatment plants. Background Technology

[0002] With the advancement of rural wastewater treatment, decentralized small-scale wastewater treatment plants are widely used in mountainous areas of western China. These plants are geographically dispersed and difficult to access, generally employing independent automated systems for local control. However, this technological model has significant drawbacks: each plant forms an "information silo," preventing the sharing of operational data; management personnel cannot centrally monitor and uniformly schedule the entire process status in real time; operation and maintenance rely on on-site personnel, resulting in slow fault response, high operating costs, low management efficiency, and unstable effluent quality. Therefore, how to achieve centralized, intelligent, and efficient operation and management of multi-point distributed rural wastewater treatment plants has become an urgent technical challenge. Summary of the Invention

[0003] In view of this, the purpose of this invention is to provide a centralized control method, device, electronic equipment and medium for township sewage treatment plants, which constructs an integrated approach of local monitoring, dedicated network transmission and centralized control, realizing real-time centralized monitoring, remote intelligent scheduling and collaborative optimization management of each decentralized plant, significantly reducing reliance on manpower and operating costs, and effectively ensuring the stable compliance of effluent water quality.

[0004] In a first aspect, embodiments of the present invention provide a centralized control method for township sewage treatment plants. The method includes: real-time acquisition of operating data of process equipment and monitoring data of monitoring instruments from multiple township sewage treatment plants via a PLC system; real-time transmission of the acquired operating data and monitoring data to a centralized control center via a network transmission layer composed of dedicated lines from telecom operators; receiving the operating data and monitoring data via a SCADA system at the centralized control center, and integrating and analyzing the data to remotely monitor production operating parameters; when abnormal production operating parameters are detected based on the analysis, issuing control commands from the centralized control center to the PLC system via the network transmission layer; and executing the control commands via the PLC system to adjust the operating parameters of the process equipment.

[0005] In a preferred embodiment of the present invention, the above-mentioned real-time acquisition of operating data of process equipment and monitoring data of monitoring instruments of multiple township sewage treatment plants through a PLC system includes: connecting process equipment and monitoring instruments to the PLC system via fieldbus; and reading operating data of process equipment and monitoring data of monitoring instruments through the PLC system.

[0006] In a preferred embodiment of the present invention, the above-mentioned real-time transmission of the collected operation data and monitoring data to the centralized control center through a network transmission layer composed of carrier leased lines includes: transmitting the operation data and monitoring data from the PLC system or the host computer system connected to the PLC system to the network transmission layer through industrial Ethernet switches and gateways; and transmitting the operation data and monitoring data to the centralized control center in real time through a local area network composed of carrier leased lines.

[0007] In a preferred embodiment of the present invention, the above-mentioned receiving of operational data and monitoring data through the SCADA system in the centralized control center, and integrating and analyzing the data, includes: storing, managing, processing and monitoring the operational data and monitoring data in real time through the SCADA system deployed on the server; and displaying the operational data and monitoring data graphically, performing trend analysis and alarm management through the SCADA client software on the control workstation.

[0008] In a preferred embodiment of the present invention, the above-mentioned sending control commands from the centralized control center to the PLC system through the network transmission layer includes: generating control commands through the SCADA client software of the control workstation; and sending the control commands to the PLC system of the target wastewater treatment plant through the network transmission layer.

[0009] In a preferred embodiment of the present invention, the above-mentioned execution of control commands by the PLC system to adjust the operating parameters of the process equipment includes: the PLC system controlling the start-up, stop or adjustment of the operating parameters of the process equipment based on the control commands; the process equipment includes a mixing device, a sludge discharge device, an aeration device or a chemical dosing device.

[0010] In a preferred embodiment of the present invention, the method further includes configuring a three-level control mode for the process equipment, including: a local control level, a station control level, and a central control level; the local control level allows operators to control the process equipment at the equipment site through an electrical control cabinet, without the PLC system participating in the control; the station control level allows operators to send instructions to the PLC system through a host computer system, and the PLC system controls the process equipment; the central control level allows operators to send instructions to the PLC system through a centralized control center, and the PLC system controls the process equipment.

[0011] Secondly, embodiments of the present invention also provide a centralized control device for township sewage treatment plants. The device includes: a data acquisition module for real-time acquisition of operating data of process equipment and monitoring data of monitoring instruments from multiple township sewage treatment plants via a PLC system; a data transmission module for real-time transmission of the acquired operating data and monitoring data to a centralized control center via a network transmission layer composed of dedicated lines from telecom operators; a data analysis module for receiving operating data and monitoring data at the centralized control center via a SCADA system, and integrating and analyzing the data to remotely monitor production operating parameters; a control command issuing module for issuing control commands from the centralized control center to the PLC system via the network transmission layer when abnormal production operating parameters are detected based on analysis; and a control command execution module for executing control commands via the PLC system to adjust the operating parameters of the process equipment.

[0012] Thirdly, embodiments of the present invention also provide an electronic device, including a processor and a memory, wherein the memory stores computer-executable instructions that can be executed by the processor, and the processor executes the computer-executable instructions to implement the centralized control method for township sewage treatment plants described in the first aspect.

[0013] Fourthly, embodiments of the present invention also provide a computer-readable storage medium storing computer-executable instructions. When the computer-executable instructions are invoked and executed by a processor, the computer-executable instructions cause the processor to implement the centralized control method for township sewage treatment plants described in the first aspect.

[0014] The embodiments of the present invention bring the following beneficial effects: This invention provides a centralized control method, device, electronic equipment, and medium for township wastewater treatment plants. A PLC system collects real-time operational data from process equipment and monitoring data from instruments at multiple township wastewater treatment plants. The collected operational and monitoring data are transmitted in real-time to a centralized control center via a network transmission layer composed of dedicated lines from a telecom operator. At the centralized control center, a SCADA system receives the operational and monitoring data, integrates and analyzes the data to remotely monitor production parameters. When abnormal production parameters are detected based on the analysis, a control command is sent from the centralized control center to the PLC system via the network transmission layer. The PLC system executes the control command to adjust the operational parameters of the process equipment. This approach integrates local monitoring, dedicated network transmission, and centralized control, achieving real-time centralized monitoring, remote intelligent scheduling, and collaborative optimization management of various decentralized plants. This significantly reduces reliance on manpower and operating costs, effectively ensuring stable compliance of effluent quality.

[0015] Other features and advantages of this disclosure will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the techniques described above.

[0016] To make the above-mentioned objects, features and advantages of this disclosure more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A flowchart of a centralized control method for a township sewage treatment plant provided in an embodiment of the present invention; Figure 2 A flowchart of another centralized control method for township sewage treatment plants provided in an embodiment of the present invention; Figure 3 A structural diagram of a centralized control system for a township sewage treatment plant provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a centralized control device for a township sewage treatment plant provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In recent years, with the acceleration of China's industrialization, environmental pollution has become increasingly prominent, and the call for sustainable development has grown louder, leading to an increasingly urgent need for intelligent and complex wastewater treatment. This is especially true for western mountainous cities, where the terrain is rugged, towns are scattered, and wastewater pipe networks have limited coverage. Often, small-scale wastewater treatment plants need to be built in each town for on-site collection and treatment. These town wastewater treatment plants are numerous, widely distributed, and located in remote areas, facing challenges such as dispersed equipment, diverse operating conditions, and insufficient personnel. Due to the mountainous terrain and inconvenient transportation, manual inspections are inefficient and difficult to detect and address operational anomalies promptly. Furthermore, the lack of unified scheduling and operational optimization methods among plants easily leads to differences in treatment efficiency, high energy consumption, and fluctuations in effluent quality. Existing automation systems are mostly independent of each plant, failing to achieve cross-plant data sharing and unified monitoring. Management personnel must rely on on-site operations and lack the ability to monitor and coordinate the overall operational status in real time. Therefore, there is an urgent need for a centralized control system that can adapt to the geographical features of mountainous cities and realize centralized monitoring, remote scheduling and intelligent operation management of multi-point distributed sewage treatment plants, so as to improve operation and maintenance efficiency, reduce labor costs and ensure stable effluent quality.

[0021] Based on this, the present invention provides a centralized control method, device, electronic equipment, and medium for township sewage treatment plants. This method allows for real-time acquisition of operational data from process equipment and monitoring data from instruments at multiple township sewage treatment plants via a PLC system. The acquired operational and monitoring data are transmitted in real-time to a centralized control center via a network transmission layer composed of dedicated operator lines. At the centralized control center, the operational and monitoring data are received through a SCADA system, which integrates and analyzes the data to remotely monitor production parameters. When abnormal production parameters are detected based on the analysis, a control command is sent from the centralized control center to the PLC system via the network transmission layer. The PLC system executes the control command to adjust the operational parameters of the process equipment. This approach integrates local monitoring, dedicated network transmission, and centralized control, enabling real-time centralized monitoring, remote intelligent scheduling, and collaborative optimization management of various dispersed plants. This significantly reduces reliance on manpower and operating costs, effectively ensuring stable compliance of effluent quality.

[0022] To facilitate understanding of this embodiment, a centralized control method for township sewage treatment plants disclosed in this embodiment of the invention will first be described in detail.

[0023] Example 1 This invention provides a centralized control method for township sewage treatment plants. Figure 1 A flowchart illustrating a centralized control method for a township sewage treatment plant, provided as an embodiment of the present invention. Figure 1 As shown, the centralized control method for the township sewage treatment plant may include the following steps: Step S101: Real-time data collection of process equipment operation data and monitoring data from monitoring instruments of multiple township sewage treatment plants is performed through the PLC system.

[0024] Among them, PLC system: Programmable Logic Controller, a digital computer used in industrial environments, is used to execute instructions such as logic control, sequential control, timing, counting and arithmetic operations to control machines or production processes.

[0025] Process equipment refers to the mechanical equipment that directly participates in the wastewater treatment process. This includes, but is not limited to: agitators (mixing equipment), sludge pumps (sludge removal equipment), blowers or aeration heads (aeration equipment), and dosing pumps (dosing equipment) in equalization tanks, anoxic tanks, and aerobic tanks.

[0026] Among them, operating data refers to the working status information of the process equipment itself, such as the motor start / stop status, operating frequency, current, voltage, fault alarm signals, cumulative running time, etc.

[0027] Monitoring instruments include sensors and instruments used to measure and provide feedback on various physical and chemical parameters during the process. These include, but are not limited to: ultrasonic level gauges (for measuring water tank levels), electromagnetic flow meters (for measuring influent / effluent flow rates), dissolved oxygen analyzers (DO meters, for measuring dissolved oxygen concentration in aerobic tanks), and oxidation-reduction potentiometers (ORP meters, for reflecting the biochemical reaction environment).

[0028] Among them, monitoring data refers to the process parameter values ​​measured by monitoring instruments, such as liquid level (meters), instantaneous flow rate (cubic meters / hour), dissolved oxygen concentration (mg / L), oxidation-reduction potential (mV), pH value, turbidity, etc.

[0029] In each township wastewater treatment plant, the PLC is connected to the control loop of the process equipment and the signal output terminal of the monitoring instrument through its digital input (DI) / analog input (AI) module or communication interface (such as RS485).

[0030] The PLC reads these input signals cyclically according to a preset scanning cycle (e.g., 100 milliseconds). For example, it reads the "run" signal (DI point) of the aeration blower in aerobic tank No. 1, and reads the 4-20mA current signal from the DO meter in that tank and converts it into dissolved oxygen concentration value.

[0031] The PLC runs a control program written according to the process requirements. In addition to collecting data, it can also perform basic local logic judgments and control outputs.

[0032] Specifically, the PLC system can collect real-time operating data of process equipment and monitoring data of monitoring instruments from multiple township sewage treatment plants. This can include: connecting process equipment and monitoring instruments to the PLC system via fieldbus; and reading the operating data of process equipment and monitoring data of monitoring instruments through the PLC system.

[0033] Among them, fieldbus is a digital, serial, multi-point communication network, such as RS485, used in industrial fields to connect intelligent field devices (such as instruments and actuators) with automated control systems.

[0034] For example, the PLC's RS485 communication port can be connected in series with multiple devices supporting the Modbus RTU protocol (such as 3 dosing pumps and 2 DO meters) via a shielded twisted-pair cable. The PLC, acting as the master station, polls these slave devices by address to read their status and measured values.

[0035] Step S102: The collected operational and monitoring data are transmitted in real time to the centralized control center through a network transmission layer composed of dedicated operator lines.

[0036] Among them, carrier leased lines refer to dedicated communication lines leased by network service providers, such as MPLS-VPN and SDH leased lines. Their characteristics include guaranteed bandwidth, stable lines, low latency, and high security (isolated from the public internet).

[0037] Among them, the network transmission layer refers to the dedicated wide area network (WAN) built by the operator's leased lines, connecting various decentralized sewage treatment plants with the centralized control center.

[0038] For example, the PLC or host computer in the factory sends packaged data to the factory's industrial gateway or router via an industrial Ethernet switch. This gateway connects to a local operator's dedicated network node via fiber optic cable or cable. The data packets are routed within the operator's dedicated network, traversing geographical space, and finally arrive at the network access point where the centralized control center is located. For example, data from factory A in township A is transmitted 50 kilometers via a dedicated line and then converges with data from factory B in township A to the centralized control center's computer room in the city.

[0039] Specifically, the collected operational and monitoring data are transmitted in real time to the centralized control center through a network transmission layer composed of carrier leased lines. This can include: transmitting operational and monitoring data from the PLC system or the host computer system connected to the PLC system to the network transmission layer through industrial Ethernet switches and gateways; and transmitting operational and monitoring data to the centralized control center in real time through a local area network composed of carrier leased lines.

[0040] For example, via the host computer: The PLC first uploads the data to the local host computer (industrial control computer) via the factory's Ethernet. The data forwarding service or OPC server on the host computer packages the data and then sends it to the dedicated line via the industrial Ethernet switch and gateway.

[0041] PLC direct transmission: Some high-end PLCs or PLCs equipped with specific communication modules can connect directly to the industrial gateway via their own Ethernet interface without going through a host computer, pushing data to the dedicated network. This method reduces intermediate steps and provides higher real-time performance.

[0042] Local Area Network (LAN): This LAN is a logical concept, referring to a virtual private network built through carrier leased line technology (such as VPN), which makes geographically dispersed plants and centers logically appear to be in the same secure LAN, facilitating data communication and management.

[0043] In step S103, at the centralized control center, operational and monitoring data are received through the SCADA system, and the data is integrated and analyzed to remotely monitor production operation parameters.

[0044] The centralized control center is a physical location (such as a dispatch center) that houses the hardware and software systems used for comprehensive monitoring and dispatching.

[0045] Among them, SCADA system: monitoring and data acquisition system, is an industrial control system software used to monitor and control distributed assets. Its core functions include data acquisition, network communication, human-machine interface (HMI), alarm handling, and data analysis.

[0046] The SCADA system's communication server continuously listens to network ports, receives data packets from various factories, parses and verifies them, and writes the data to a real-time database. For example, data from 10 different township factories are uniformly timestamped and identified by the factory, then stored in the same database table to form a comprehensive data view.

[0047] For example, the HMI screen dynamically displays the status of each plant's equipment (e.g., green for pumps indicates operation, red for pumps indicates shutdown) and real-time parameters (e.g., liquid level). The system plots historical trend curves of key parameters (e.g., influent flow rate, effluent COD) for maintenance personnel to analyze process changes. The SCADA system has built-in normal range thresholds for various parameters (e.g., DO in the aerobic tank should be maintained at 2-4 mg / L), and the system continuously compares real-time data with the thresholds.

[0048] Furthermore, in addition to basic threshold alarms, SCADA systems or integrated upper-level platforms can perform more in-depth data analysis, such as calculating plant-wide energy consumption indicators (kWh / ton of water), identifying trends in equipment efficiency decline, and predicting effluent water quality based on influent load, providing decision support for optimized operation.

[0049] Specifically, in the centralized control center, operational and monitoring data are received through the SCADA system, and the data is integrated and analyzed. This may include: storing, managing, processing, and monitoring operational and monitoring data in real time through the SCADA system deployed on the server; and displaying operational and monitoring data graphically, performing trend analysis, and managing alarms through the SCADA client software on the control workstation.

[0050] The server (backend) is responsible for core data services. For example, the database server stores all historical data; the application server runs the core SCADA services, performs complex calculations (such as cumulative water treatment volume), manages alarm logic, processes control command queues, and provides data interfaces to other systems (such as MES or cloud platforms).

[0051] The control workstation (front end) provides an interactive interface for operators. For example, operators can access real-time footage from any plant, view the influent ammonia nitrogen change curve over the past 24 hours, and confirm and silence a "pump overheating" alarm. All of this is achieved through interaction between the SCADA client software and the backend server.

[0052] Step S104: When abnormal production operation parameters are found based on analysis, control commands are sent from the centralized control center to the PLC system through the network transmission layer.

[0053] Abnormal production operation parameters refer to any state that deviates from the preset safe or optimized operating range. Examples include: excessively high / low liquid level, insufficient dissolved oxygen concentration, equipment failure shutdown, and warnings of excessive effluent quality.

[0054] Among them, the control command is a digital command generated by the SCADA system to change the status of field equipment. It typically includes information such as the target plant address, the target equipment identifier, and the action to be performed (such as start, stop, or set frequency value).

[0055] For example, the SCADA system monitors that "the dissolved oxygen concentration in aerobic tank 1 of Plant B has been below 2.0 mg / L for 5 minutes," triggering a "low DO alarm." After confirming the alarm, the central dispatcher, through the SCADA client software, controls the blower to increase its frequency and sets the new frequency to 45Hz. The SCADA system translates this operation into a standard control command (such as a Modbus TCP write command). This command is transmitted via the central core switch, through the carrier's dedicated network line, and back to the network equipment of the wastewater treatment plant in Township B, ultimately reaching the target PLC.

[0056] Specifically, issuing control commands from the centralized control center to the PLC system via the network transmission layer can include: generating control commands through the SCADA client software of the control workstation; and sending the control commands to the PLC system of the target wastewater treatment plant via the network transmission layer.

[0057] Step S105: Execute control commands through the PLC system to adjust the operating parameters of the process equipment.

[0058] Specifically, the PLC system executes control commands to adjust the operating parameters of the process equipment, which may include: the PLC system controlling the start-up, stop, or adjustment of the operating parameters of the process equipment based on the control commands; the process equipment includes mixing equipment, sludge discharge equipment, aeration equipment, or chemical dosing equipment.

[0059] For example, when Plant B's PLC receives a command from the central control center to "set the blower frequency to 45Hz," the PLC's control program executes the command, sending a corresponding control signal to the blower's frequency converter via its analog output (AO) module or communication interface. The blower's frequency converter responds to the signal, adjusting the motor speed and increasing the aeration rate. Subsequently, the dissolved oxygen concentration monitored by the DO meter begins to rise. This data is again collected by the PLC and fed back to the central control center through the corresponding path, thus forming a complete closed-loop control loop of "monitoring-analysis-decision-control-feedback."

[0060] The centralized control method for township wastewater treatment plants provided in this invention can collect real-time operational data of process equipment and monitoring data of monitoring instruments from multiple township wastewater treatment plants through a PLC system. The collected operational and monitoring data are transmitted in real-time to a centralized control center via a network transmission layer composed of dedicated lines from telecom operators. At the centralized control center, the operational and monitoring data are received through a SCADA system, and the data is integrated and analyzed to remotely monitor production operation parameters. When abnormal production operation parameters are detected based on the analysis, control commands are sent from the centralized control center to the PLC system through the network transmission layer. The PLC system executes the control commands to adjust the operating parameters of the process equipment. This method constructs an integrated approach of local monitoring, dedicated network transmission, and centralized control, realizing real-time centralized monitoring, remote intelligent scheduling, and collaborative optimization management of various decentralized plants. This significantly reduces reliance on manpower and operating costs, effectively ensuring stable compliance of effluent water quality standards.

[0061] Example 2 This invention also provides another centralized control method for township sewage treatment plants; this method is implemented based on the method in the above embodiments.

[0062] Figure 2 A flowchart of another centralized control method for township sewage treatment plants provided in an embodiment of the present invention is shown below. Figure 2 As shown, the centralized control method for the township sewage treatment plant may also include the following steps: Step S201: Configure a three-level control mode for the process equipment. Specifically, the three-level control mode configuration includes: local control level, station control level, and central centralized control level.

[0063] In the local control level, operators control the process equipment at the equipment site through an electrical control cabinet, and the PLC system does not participate in the control.

[0064] The local control level serves as the final safeguard during equipment commissioning, emergency shutdown, or remote system failure. For example, maintenance personnel can directly switch the "manual / automatic" knob on the control cabinet to "manual" next to the aeration blower and then press the "start" button. The equipment will respond immediately, and this process is completely independent of the PLC or network.

[0065] In the station control level, operators send instructions to the PLC system through the host computer system, and the PLC system controls the operation of the process equipment.

[0066] Among them, the station control level is suitable for daily inspections and local process adjustments within the plant. For example, if the on-duty personnel in the plant find that the sludge level in the sedimentation tank is too high on the host computer, they can start the sludge discharge valve of that tank independently on the host computer monitoring screen of the plant, without affecting other plants or requiring central intervention.

[0067] In the central control level, operators send instructions to the PLC system through a centralized control center, and the PLC system then controls the operation of the process equipment.

[0068] The central control level is suitable for comprehensive coordination, optimization, and emergency dispatch. For example, based on a weather forecast (heavy rain is expected), the center predicts a surge in the inflow of water to each plant. Therefore, it sends a batch of instructions through the SCADA system to all downstream plant booster pump stations to "empty the pipeline capacity in advance" and uniformly lowers the target liquid level control of the pump stations by 0.5 meters.

[0069] Step S202: The three-level control mode is activated based on the preset control requirements.

[0070] Specifically, the three-level control mode is activated based on preset control requirements, and may include: activating the local control level in case of an emergency at the equipment site; activating the station control level when controlling a single plant in a coordinated manner; and activating the central control level when coordinating the management and control of multiple plants.

[0071] The three modes are complementary and have hierarchically overlapping permissions. Instructions at both the station control level and the central control level are executed by the PLC, but the PLC program sets priorities (usually the central control level has the highest priority). The local control level has the highest hardware priority; when activated, it temporarily blocks automatic control signals from the PLC to ensure the absolute safety of on-site personnel. This achieves a balance between control flexibility and system security.

[0072] Example 3 This invention also provides a centralized control system for township sewage treatment plants; the system is implemented based on the methods described in the above embodiments.

[0073] Figure 3 A structural diagram of a centralized control system for a township sewage treatment plant provided in an embodiment of the present invention is shown below. Figure 3 As shown, the centralized control system of the township sewage treatment plant may include the following structure: Local monitoring layer: The PLC system collects the operating data of all process equipment and monitoring data of all sewage treatment process sections in the sewage treatment plants in various townships in real time. Each piece of equipment operates according to the program set by the PLC system. The PLC system transmits the collected equipment data to the host computer system. At the same time, the data is transmitted to the centralized control center in real time through the operator's dedicated line via industrial Ethernet switches and gateways. The PLC system also receives and executes the instructions issued by the centralized control center.

[0074] Network transmission layer: It adopts a local area network composed of dedicated lines from operators to transmit data collected by the local monitoring layer to the centralized control center in real time, and is also used to transmit instructions issued by the centralized control center.

[0075] Central Control Center: By deploying a SCADA system, it receives data collected by the local monitoring layer, integrates, analyzes and manages the data, and then remotely monitors production operation parameters. When problems are detected, it promptly issues instructions to the local monitoring layer to adjust and optimize the operation parameters to a reasonable range.

[0076] The local monitoring layer specifically includes process equipment (1), monitoring instruments (2), PLC system (3), host computer system (4), industrial Ethernet switch (5), and gateway (6).

[0077] The process equipment (1) includes: mixing equipment, sludge removal equipment, aeration equipment, dosing equipment, etc. in the sewage treatment process section such as equalization tank, anoxic tank, and aerobic tank. The process equipment (1) is connected to the PLC system (3) via RS485 bus, and transmits the operation data of each process equipment (1) to the PLC system (3) in real time. Each process equipment (1) runs according to the program set by the PLC system (3) and receives the control instructions issued by the PLC system (3), and then makes corresponding control actions, such as start / stop.

[0078] The monitoring instruments (2) include ultrasonic level gauges, electromagnetic flow meters, DO meters, ORP meters, etc. The monitoring instruments (2) are connected to the PLC system (3) via RS485 bus and transmit the monitoring data of each monitoring instrument (2) to the PLC system (3) in real time.

[0079] The PLC system (3) is a programmable logic controller, mainly composed of a power supply, a central processing unit (CPU), an input / output unit (I / O unit), a memory, and a communication interface. Its lower end is connected to each process equipment (1) and monitoring instrument (2) via an RS485 bus, and its upper end is connected to the host computer system (4) via an Ethernet communication port. The PLC system (3) reads the operating data of each process equipment (1) and the monitoring data of the monitoring instrument (2) via the RS485 bus, and controls the process equipment (1) in reverse.

[0080] The process equipment (1) adopts a three-level control method: The first level is the "local control level": that is, the operator controls the equipment at the equipment site through the electrical control cabinet. This control method is realized by the electrical circuit, and the PLC system (3) does not participate in the control.

[0081] The second level is the "station control level": that is, the operator sends instructions to the PLC system (3) from the host computer, and the PLC system (3) controls the operation of the equipment according to the instructions.

[0082] The third level is the "centralized control level": that is, the operator sends instructions to the PLC system (3) on the centralized control center platform, and the PLC system (3) operates and controls the equipment according to the instructions.

[0083] This three-level control mode is not a simple hierarchical superposition, but rather a solution to the needs of precise control and efficient collaborative management of sewage treatment in rural areas, thereby achieving full-chain control from process equipment (1) to the central control center.

[0084] First, the "local control level" focuses on the underlying control infrastructure, ensuring complete controllability of process equipment and providing stable basic data and operational status for subsequent levels of control. Second, the "station control level" focuses on the coordinated control of a single plant, centralizing the traditional decentralized operation of a single plant onto a host computer, significantly reducing the workload of on-site maintenance and improving control accuracy and process synergy. Finally, the "centralized control level" focuses on the coordinated management and control of wastewater treatment plants in various townships, realizing centralized monitoring, remote scheduling, and intelligent operation management of multiple plants, greatly improving operation and maintenance efficiency, reducing labor costs, and ensuring stable effluent compliance.

[0085] The three-level control mode provides full-chain control assurance from the site to the central control center. Through hierarchical division of labor and data exchange, it solves the problems of manpower waste and low efficiency in the traditional operation mode, and is especially suitable for the characteristics of rural sewage treatment plants that are numerous, widely distributed and geographically dispersed.

[0086] The host computer system (4) mainly consists of three parts: hardware platform, operating system, and dedicated software. The hardware platform is a high-performance workstation, the operating system is Windows, and the dedicated software includes configuration software, office software, etc. As the monitoring and control center of each sewage treatment plant, the host computer system (4) allows plant management personnel to query real-time and historical data of each device, and store, analyze, and manage the data. At the same time, the host computer system (4) is connected to the PLC system (3) through an industrial Ethernet switch (5) to control the on-site process equipment (1) for efficient operation and management.

[0087] The industrial Ethernet switch (5) connects the PLC system (3) and the host computer system (4) through a physical interface. The industrial Ethernet switch (5) supports various communication protocols, enabling the PLC system (3) and the host computer system (4) to transmit data efficiently and stably, and realize real-time monitoring and control of the production process. At the same time, the industrial Ethernet switch (5) is connected to the gateway (6) to realize communication between the sewage treatment plant's internal network and the external network.

[0088] The gateway (6) serves as a bridge between the internal network and the external network of the sewage treatment plant, playing a role in network connection and data exchange.

[0089] The network transmission layer uses a local area network (LAN) composed of dedicated operator lines to transmit data collected by the local monitoring layer to the centralized control center in real time. It also transmits commands issued by the centralized control center. The advantages of this dedicated operator network transmission layer include high stability, fast transmission speed, low network latency, and high security, making communication between the local monitoring layer and the centralized control center more stable, faster, and more secure.

[0090] The centralized control center specifically includes a core switch (7), a server (8), a control workstation (9), and a large-screen display system (10).

[0091] The core switch (7) is the core network device of the entire centralized control center. On the one hand, it brings together all network devices in the centralized control center to the core switch (7), and each device can access each other and share data through the core switch (7). On the other hand, the core switch (7) serves as a bridge between the internal network and the external network of the centralized control center, enabling communication between the internal and external networks of the centralized control center.

[0092] The server (8) is mainly used to deploy SCADA systems. SCADA systems are software systems used to monitor and control industrial processes. In SCADA systems, the server plays a role in data storage and management, data processing and analysis, network and communication management, virtualization and resource optimization, backup and disaster recovery, real-time monitoring and alarms, etc.

[0093] The control workstation (9) mainly consists of three parts: hardware platform, operating system and dedicated software.

[0094] The hardware platform is a high-performance workstation, the operating system is Windows, and the dedicated software includes SCADA client software, office software, etc. The control workstation (9) serves as the user terminal of the SCADA system, enabling operators to efficiently and safely monitor and control the process of each wastewater treatment plant, and realize real-time management and decision-making.

[0095] First, the SCADA client software allows operators to intuitively monitor and manage the entire system through a graphical user interface, viewing real-time data, charts, and alarm information, and obtaining the operating status, historical data, and trend analysis results of various on-site equipment. Second, the SCADA client software can send control commands (such as start, stop, and parameter adjustment) to on-site equipment, enabling direct management of the wastewater treatment process. This interaction ensures that operators can flexibly respond to emergencies.

[0096] In addition, the SCADA client software provides alarm notification and event management functions on the operator's computer. The operator can receive timely alarms for system anomalies and faults and view detailed information about related events so that they can take swift action.

[0097] The large screen display system (10) is the core display platform of the entire centralized control system. It centrally presents the real-time operation data, water quality parameters, equipment status, etc. of all sewage treatment process sections in each sewage treatment plant, and combines process flow diagrams, trend curves and alarm information to form an intuitive and dynamic full-process visualization interface.

[0098] Operators and managers can quickly grasp the operating status of each processing unit through the large screen, facilitating unified scheduling, optimization of operating parameters, and coordination of maintenance operations. When water quality fluctuations, equipment failures, or risks of water quality exceeding standards occur, the large screen system can promptly highlight alarms and locate the specific process section, supporting dispatchers to respond quickly and achieve stable and efficient operation of the entire plant.

[0099] Example 4 Corresponding to the above method embodiments, this invention provides a centralized control device for township sewage treatment plants. Figure 4 This is a schematic diagram of the structure of a centralized control device for a township sewage treatment plant provided in an embodiment of the present invention, as shown below. Figure 4 As shown, the centralized control device for the township sewage treatment plant may include: The data acquisition module 401 is used to collect real-time operating data of process equipment and monitoring data of monitoring instruments from multiple township sewage treatment plants through the PLC system.

[0100] The data transmission module 402 is used to transmit the collected operational data and monitoring data to the centralized control center in real time through a network transmission layer composed of dedicated lines from operators.

[0101] The data analysis module 403 is used to receive operational and monitoring data through the SCADA system in the centralized control center, and to integrate and analyze the data in order to remotely monitor production operation parameters.

[0102] The control command issuing module 404 is used to issue control commands from the centralized control center to the PLC system through the network transmission layer when abnormal production operation parameters are detected based on analysis.

[0103] The control instruction execution module 405 is used to execute control instructions through the PLC system to adjust the operating parameters of the process equipment.

[0104] The centralized control device for township wastewater treatment plants provided in this invention can collect real-time operational data of process equipment and monitoring data of monitoring instruments from multiple township wastewater treatment plants through a PLC system. The collected operational and monitoring data are transmitted in real-time to the centralized control center via a network transmission layer composed of dedicated lines from telecom operators. At the centralized control center, the operational and monitoring data are received through a SCADA system, and the data is integrated and analyzed to remotely monitor production operation parameters. When abnormal production operation parameters are detected based on the analysis, control commands are sent from the centralized control center to the PLC system through the network transmission layer. The PLC system executes the control commands to adjust the operating parameters of the process equipment. This approach integrates local monitoring, dedicated network transmission, and centralized control, achieving real-time centralized monitoring, remote intelligent scheduling, and collaborative optimization management of various decentralized plants. This significantly reduces reliance on manpower and operating costs, effectively ensuring stable compliance of effluent water quality standards.

[0105] In some embodiments, the data acquisition module is further configured to connect the process equipment and monitoring instruments to the PLC system via a fieldbus; and to read the operating data of the process equipment and the monitoring data of the monitoring instruments through the PLC system.

[0106] In some embodiments, the data transmission module is also used to transmit operating data and monitoring data from the PLC system or the host computer system connected to the PLC system to the network transmission layer through an industrial Ethernet switch and gateway; and to transmit operating data and monitoring data to the centralized control center in real time through a local area network composed of dedicated lines from operators.

[0107] In some embodiments, the data analysis module is also used to store, manage, process, and monitor operational and monitoring data in real time through a SCADA system deployed on a server; and to perform graphical display, trend analysis, and alarm management of operational and monitoring data through SCADA client software on a control workstation.

[0108] In some embodiments, the control command issuing module is further configured to generate control commands through the SCADA client software of the control workstation; and send the control commands to the PLC system of the target wastewater treatment plant through the network transmission layer.

[0109] In some embodiments, the control instruction execution module is also used by the PLC system to control the start-up, stop, or adjustment of operating parameters of the process equipment based on control instructions; the process equipment includes mixing equipment, sludge discharge equipment, aeration equipment, or chemical dosing equipment.

[0110] In some embodiments, the control instruction execution module is further configured to configure a three-level control mode for the process equipment, including: local control level, station control level, and central control level; the local control level allows operators to control the process equipment at the equipment site through an electrical control cabinet, without the PLC system participating in the control; the station control level allows operators to send instructions to the PLC system through a host computer system, and the PLC system controls the process equipment; the central control level allows operators to send instructions to the PLC system through a centralized control center, and the PLC system controls the process equipment.

[0111] The device provided in this embodiment of the invention has the same implementation principle and technical effect as the aforementioned method embodiment. For the sake of brevity, any parts not mentioned in the device embodiment can be referred to the corresponding content in the aforementioned method embodiment.

[0112] Example 5 This invention also provides an electronic device for operating the above-described centralized control method for township sewage treatment plants; see [link to related documentation]. Figure 5 The diagram shows the structure of an electronic device, which includes a memory 500 and a processor 501. The memory 500 stores one or more computer instructions, which are executed by the processor 501 to implement the above-mentioned centralized control method for township sewage treatment plants.

[0113] Furthermore, Figure 5 The electronic device shown also includes a bus 502 and a communication interface 503. The processor 501, the communication interface 503 and the memory 500 are connected via the bus 502.

[0114] The memory 500 may include high-speed random access memory (RAM) and may also include non-volatile memory, such as at least one disk storage device. Communication between this system network element and at least one other network element is achieved through at least one communication interface 503 (which can be wired or wireless), such as the Internet, wide area network, local area network, metropolitan area network, etc. The bus 502 can be an ISA bus, PCI bus, or EISA bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 5 The symbol is represented by a single double-headed arrow, but this does not mean that there is only one bus or one type of bus.

[0115] Processor 501 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of processor 501 or by instructions in software form. Processor 501 can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this invention. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this invention can be directly manifested as execution by a hardware decoding processor, or execution by a combination of hardware and software modules in the decoding processor. The software module can reside in a readily available storage medium in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory 500, and processor 501 reads information from memory 500 and, in conjunction with its hardware, completes the steps of the method described in the foregoing embodiments.

[0116] This invention also provides a computer-readable storage medium storing computer-executable instructions. When these computer-executable instructions are called and executed by a processor, they cause the processor to implement the aforementioned centralized control method for township sewage treatment plants. For specific implementation details, please refer to the method embodiments, which will not be repeated here.

[0117] The computer program product for the centralized control method of township sewage treatment plants provided in this embodiment of the invention includes a computer-readable storage medium storing non-volatile program code executable by a processor. The instructions included in the program code can be used to execute the methods described in the preceding method embodiments. For specific implementation, please refer to the method embodiments, which will not be repeated here.

[0118] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0119] In the several embodiments provided by this invention, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the coupling or direct coupling or communication connection shown or discussed may be through some communication interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0120] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected based on actual needs to achieve the purpose of this embodiment.

[0121] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0122] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0123] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A centralized control method for township sewage treatment plants, characterized in that, The method includes: The PLC system collects real-time operational data of process equipment and monitoring data of monitoring instruments from multiple township sewage treatment plants. The collected operational and monitoring data are transmitted in real time to the centralized control center through a network transmission layer composed of dedicated lines from operators. In the centralized control center, the operational and monitoring data are received through the SCADA system, and the data is integrated and analyzed to remotely monitor production operation parameters. When abnormal production operation parameters are detected based on analysis, control commands are sent from the centralized control center to the PLC system through the network transmission layer. The control commands are executed by the PLC system to adjust the operating parameters of the process equipment.

2. The method according to claim 1, characterized in that, The system uses a PLC to collect real-time operational data from the process equipment of multiple township wastewater treatment plants and monitoring data from monitoring instruments, including: The process equipment and monitoring instruments are connected to the PLC system via fieldbus; The PLC system reads the operating data of the process equipment and the monitoring data of the monitoring instruments.

3. The method according to claim 1, characterized in that, The process of transmitting the collected operational and monitoring data to the centralized control center in real time via a network transmission layer composed of dedicated operator lines includes: The operational and monitoring data are transmitted from the PLC system or the host computer system connected to the PLC system to the network transmission layer via industrial Ethernet switches and gateways. The operational and monitoring data are transmitted in real time to the centralized control center via a local area network composed of the operator's dedicated lines.

4. The method according to claim 1, characterized in that, The central control center receives the operational and monitoring data via the SCADA system, and integrates and analyzes the data, including: The SCADA system deployed on the server stores, manages, processes, and monitors the operational and monitoring data in real time. The SCADA client software on the control workstation is used to graphically display, analyze trends, and manage alarms for the operational and monitoring data.

5. The method according to claim 1, characterized in that, The step of sending control commands from the centralized control center to the PLC system through the network transmission layer includes: Control commands are generated through the SCADA client software on the control workstation; The control commands are sent to the PLC system of the target wastewater treatment plant through the network transmission layer.

6. The method according to claim 1, characterized in that, The step of executing the control commands through the PLC system to adjust the operating parameters of the process equipment includes: The PLC system controls the start-up, stop, or adjustment of operating parameters of the process equipment based on the control commands. The process equipment includes mixing equipment, sludge removal equipment, aeration equipment, or chemical dosing equipment.

7. The method according to claim 1, characterized in that, The method also includes configuring a three-level control mode for the process equipment, including configuration of: local control level, station control level and central centralized control level; The local control level refers to the operation and control of the process equipment by the operator at the equipment site through the electrical control cabinet, and the PLC system does not participate in the control; The station control level is where operators send instructions to the PLC system through the host computer system, and the PLC system controls the operation of the process equipment. The central control level is where operators send commands to the PLC system through the central control center, and the PLC system then controls the operation of the process equipment.

8. A centralized control device for a township sewage treatment plant, characterized in that, The device includes: The data acquisition module is used to collect real-time operating data of process equipment and monitoring data of monitoring instruments from multiple township sewage treatment plants through the PLC system; The data transmission module is used to transmit the collected operational data and monitoring data to the centralized control center in real time through a network transmission layer composed of dedicated lines from operators; The data analysis module is used to receive the operational data and monitoring data through the SCADA system in the centralized control center, and to integrate and analyze the data in order to remotely monitor production operation parameters. The control command issuing module is used to issue control commands from the centralized control center to the PLC system through the network transmission layer when abnormal production operation parameters are detected based on analysis. The control instruction execution module is used to execute the control instructions through the PLC system to adjust the operating parameters of the process equipment.

9. An electronic device, characterized in that, The method includes a processor and a memory, the memory storing computer-executable instructions that can be executed by the processor, the processor executing the computer-executable instructions to implement the centralized control method for township sewage treatment plants according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when invoked and executed by a processor, cause the processor to implement the centralized control method for township sewage treatment plants as described in any one of claims 1 to 7.

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