Automatic control system of heat exchange station

Abstract

The invention discloses an automatic control system for a heat exchange station. The automatic control system comprises a PLC, a monitoring platform, an alarm platform, a water pump device, a sensor group and an adjusting valve, wherein the sensor group and the adjusting valve are mounted on a pipeline system; the PLC is connected with the sensor group; the PLC is connected with the monitoring platform and is used for transmitting the data acquired by the sensor group to the monitoring platform; the monitoring platform is used for comparing the collected data with a preset threshold value and marking different data as different alarm signals according to a comparison result; the monitoring platform is used for sending the alarm signal to the alarm platform, and the alarm platform triggers a warning signal, an alarm signal and an emergency alarm signal according to the received alarm signals of different levels; the monitoring platform is further used for sending different instructions to the PLC according to different alarm signals. Remote monitoring and multi-stage alarm functions of the heat exchange station are achieved through the PLC, the monitoring platform and the alarm platform, manual intervention can be reduced when sudden failures occur, and equipment damage and production interruption are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of urban heating networks, and in particular to an automatic control system for a heat exchange station. Background Art

[0002] As a core component of the urban centralized heating system, the heat exchange station undertakes the key task of heat energy transmission and distribution. With the advancement of urbanization, the scale of heat exchange stations continues to expand, and the complexity and operation and maintenance requirements of the heating system also increase.

[0003] At present, although the heat exchange station automation control system on the market can perform remote monitoring and partial fault detection, there is still a lag in response speed when facing equipment failure or abnormal conditions, and it is unable to respond quickly to emergencies. Especially when equipment failure occurs, the response mechanism of the existing system usually relies on manual intervention or preset control logic, resulting in the system being unable to make timely adjustments in the first place, thereby increasing the risk after the failure occurs.

[0004] Therefore, the heat exchange station requires a control system with multi-level early warning and remote control capabilities to improve operating efficiency, ensure safe and stable operation, and reduce reliance on manual intervention. Summary of the invention

[0005] In response to the above problems, the present application provides an automated control system for a heat exchange station, which reduces manual intervention, can identify potential problems in advance, reduce the occurrence of equipment failures, and improve the reliability and stability of the heat exchange station equipment.

[0006] To achieve the purpose of this application, this application provides the following technical solutions:

[0007] The present application provides a heat exchange station automation control system, including: a PLC controller, a monitoring platform, an alarm platform, a water pump device, and a sensor group and a regulating valve installed on a pipeline system; the PLC controller is connected to the sensor group; the PLC controller is connected to the monitoring platform and is used to transmit the data collected by the sensor group to the monitoring platform;

[0008] The monitoring platform is used to compare the collected data with the preset threshold value, and mark different data as first-level, second-level, and third-level alarm signals according to the comparison results; the monitoring platform is used to send the alarm signal to the alarm platform, and the alarm platform triggers the warning signal, alarm signal, and emergency alarm signal according to the received first-level, second-level, and third-level alarm signals; the monitoring platform is also used to send different instructions to the PLC controller according to different alarm signals;

[0009] Among them, the warning signal is used to remind that the real-time data of the pipeline system deviates from a reasonable range; the alarm signal is used to control the PLC controller to adjust the regulating valve; the emergency alarm signal will trigger the emergency processing mechanism, and the emergency processing mechanism includes: automatic shutdown, starting backup equipment, and adjusting control parameters; starting the backup equipment includes starting the backup water pump and the backup power supply; adjusting the control parameters includes sending instructions to the PLC controller, and the PLC controller adjusts the opening of the regulating valve.

[0010] In one possible implementation, the sensor group includes a temperature sensor, a flow sensor and a pressure sensor; the pipeline system includes a water supply pipeline and a return pipeline, and the sensor group is installed on both the water supply pipeline and the return pipeline; the temperature sensor is used to monitor the water temperature changes in the pipeline system; the pressure sensor is used to monitor the pressure changes in the pipeline system; and the flow monitoring device is used to monitor the water flow changes in the pipeline system.

[0011] In one possible implementation, the water pump device includes a circulation pump and a water make-up pump, each of the water pumps is equipped with a frequency converter; each of the frequency converters is connected to the PLC controller; the PLC controller is used to control the frequency converter to adjust the speed of the water pump device when the second and third level alarm signals are triggered.

[0012] In a possible implementation, the system also includes a pressure relief device, which is connected to the PLC controller. The PLC controller is used to control the opening and closing of the pressure relief device when the second and third level alarm signals are triggered, and adjust the pressure of the inlet and outlet of the heat exchange station pipeline.

[0013] In one possible implementation, the first-level alarm signal is in the water supply pipeline data range: the temperature sensor monitors the temperature in real time: >85°C, the pressure sensor monitors the pressure in real time: >1.2 times the design pressure, and the flow sensor monitors the water supply flow in real time: <80% of the preset flow; the second-level alarm signal is in the water supply pipeline data range: the temperature sensor monitors the temperature in real time: 70-85°C, the pressure sensor monitors the pressure in real time: 0.8-1.2 times the design pressure, and the flow sensor monitors the water supply flow in real time: 80-90% of the preset flow; the third-level alarm signal is in the water supply pipeline data range: the temperature sensor monitors the temperature in real time: <70°C, the pressure sensor monitors the pressure in real time: <0.8 times the design pressure, and the flow sensor monitors the water supply flow in real time: >110% of the preset flow.

[0014] In one possible implementation, the first-level alarm signal is in the return pipe data range: the temperature sensor monitors the temperature in real time: <45°C, the pressure sensor monitors the pressure in real time: >1.2 times the design pressure, and the flow sensor monitors the water supply flow in real time: <80% of the preset flow; the second-level alarm signal is in the return pipe data range: the temperature sensor monitors the temperature in real time: 45-55°C, the pressure sensor monitors the pressure in real time: 0.8-1.2 times the design pressure, and the flow sensor monitors the water supply flow in real time: 80-90% of the preset flow; the third-level alarm signal is in the return pipe data range: the temperature sensor monitors the temperature in real time: >60°C, the pressure sensor monitors the pressure in real time: <0.8 times the design pressure, and the flow sensor monitors the water supply flow in real time: >110% of the preset flow.

[0015] In a possible implementation, the monitoring platform also includes a visualization module and a data management center. The data management center receives data transmitted by the PLC controller and transmits it to the visualization module. The visualization module is used for staff to remotely view the operation status of the heat exchange station.

[0016] In a possible implementation, the system further includes a thermal insulation material, which is coated on the water supply pipe, the return pipe, the sensor group and the regulating valve; and is used to reduce heat loss; the thermal insulation material is one of rock wool and polyurethane foam.

[0017] Beneficial effects: The present application provides a heat exchange station automation control system, which realizes remote monitoring and automatic alarm of the heat exchange station through a PLC controller, a monitoring platform and an alarm platform. By comparing the data collected by the sensor with the preset threshold, the system can detect the operating status of the equipment and pipelines in real time. Once an abnormality occurs, the system will automatically generate an alarm signal. This alarm mechanism triggers different responses, such as warnings, alarms and emergency alarms, according to the severity of the abnormality. Through this function, users can understand the status of the equipment in a timely manner and take corresponding measures. It can reduce manual intervention in the event of a sudden failure, improve the system response speed, and avoid equipment damage and production interruptions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation to the present application.

[0019] Figure 1 A schematic diagram of the system structure provided in an embodiment of the present application. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of this application, unless otherwise specified, "plurality" means two or more.

[0022] The inventor of the present invention has found that although the heat exchange station automation control system currently on the market can perform remote monitoring and partial fault detection, the response speed is still lagging when facing equipment failure or abnormal conditions, and it is unable to respond to emergencies quickly. In particular, when equipment failure occurs, the response mechanism of the existing system usually relies on manual intervention or preset control logic, resulting in the system being unable to make timely adjustments in the first place, thereby increasing the risk after the failure occurs. Based on this, in the embodiment of the present invention provided by the inventor, the system realizes remote monitoring and automatic alarm of the heat exchange station through a PLC controller, a monitoring platform and an alarm platform. By comparing the data collected by the sensor with the preset threshold, the system can detect the operating status of the equipment and pipeline in real time, and the system will automatically generate an alarm signal once an abnormality occurs. This alarm mechanism triggers different responses according to the severity of the abnormality, such as warnings, alarms and emergency alarms. Through this function, users can understand the equipment status in a timely manner and take corresponding measures. It can reduce manual intervention in the event of sudden failures, improve the system response speed, and avoid equipment damage and production interruption.

[0023] like Figure 1 As shown, an automatic control system for a heat exchange station provided in an embodiment of the present application includes: a PLC controller, a monitoring platform, an alarm platform, a water pump device, and a sensor group and a regulating valve installed on a pipeline system; the PLC controller is connected to the sensor group; the PLC controller is connected to the monitoring platform and is used to transmit data collected by the sensor group to the monitoring platform;

[0024] The monitoring platform is used to compare the collected data with the preset threshold value, and mark different data as first-level, second-level, and third-level alarm signals according to the comparison results; the monitoring platform is used to send the alarm signal to the alarm platform, and the alarm platform triggers the warning signal, alarm signal, and emergency alarm signal according to the received first-level, second-level, and third-level alarm signals; the monitoring platform is also used to send different instructions to the PLC controller according to different alarm signals;

[0025] Among them, the warning signal is used to remind that the real-time data of the pipeline system deviates from the reasonable range; the alarm signal is used to control the PLC controller to adjust the regulating valve; the emergency alarm signal will trigger the emergency processing mechanism, which includes: automatic shutdown, starting backup equipment, and adjusting control parameters; starting backup equipment includes starting backup water pumps and backup power supplies; adjusting control parameters includes sending instructions to the PLC controller, and the PLC controller adjusts the opening of the regulating valve.

[0026] In the embodiment of the present application, as the basis of the multi-level alarm mechanism, it is first necessary to install sensors on the equipment of the heat exchange station, collect real-time data of each device through the sensors, and transmit the data to the PLC controller. Then, the threshold of the multi-level alarm range is set on the monitoring platform.

[0027] Specifically, in a possible implementation, the first-level alarm signal is in the water supply pipeline data range: the temperature sensor monitors the temperature in real time: >85°C, the pressure sensor monitors the pressure in real time: >1.2 times the design pressure, and the flow sensor monitors the water supply flow in real time: <80% of the preset flow; the second-level alarm signal is in the water supply pipeline data range: the temperature sensor monitors the temperature in real time: 70-85°C, the pressure sensor monitors the pressure in real time: 0.8-1.2 times the design pressure, and the flow sensor monitors the water supply flow in real time: 80-90% of the preset flow; the third-level alarm signal is in the water supply pipeline data range: the temperature sensor monitors the temperature in real time:

[0028] <70℃, pressure sensor real-time monitoring pressure: <0.8 times design pressure, flow sensor real-time monitoring water supply flow: >110% preset flow. In one possible implementation, the first-level alarm signal is in the return pipe data range: temperature sensor real-time monitoring temperature: <45℃, pressure sensor real-time monitoring pressure: >1.2 times design pressure, flow sensor real-time monitoring water supply flow: <80% preset flow; the second-level alarm signal is in the return pipe data range: temperature sensor real-time monitoring temperature: 45-55℃, pressure sensor real-time monitoring pressure: 0.8-1.2 times design pressure, flow sensor real-time monitoring water supply flow: 80-90% preset flow; the third-level alarm signal is in the return pipe data range: temperature sensor real-time monitoring temperature: >60℃, pressure sensor real-time monitoring pressure: <0.8 times design pressure, flow sensor real-time monitoring water supply flow: >110% preset flow.

[0029] The monitoring platform obtains real-time data and compares it with the preset threshold, and then marks the alarm signal according to the actual data. This alarm mechanism triggers different responses, such as warning, alarm and emergency alarm, according to the severity of the abnormality at the first, second and third levels. Through this function, users can understand the status of the equipment in a timely manner and take corresponding measures.

[0030] It should be noted that the settings of these alarm ranges are based on the design parameters and operating conditions of the heat exchange station system and its key equipment. Specifically, the monitoring ranges of the temperature, pressure and flow of the water supply and return pipes are set according to the design capacity of the equipment, the maximum pressure of the pipes, the heat exchange efficiency, and the system operation requirements. A reasonable alarm range should ensure that the equipment works under normal operating conditions while avoiding equipment damage or performance degradation due to exceeding the design range.

[0031] The design operating temperature of the water supply pipes of most heat exchange station systems is generally higher than 85°C. Therefore, when the temperature exceeds 85°C, it may have adverse effects on equipment such as pipes and valves, resulting in material fatigue or seal failure. At this time, the first-level alarm is needed to indicate that the system is potentially dangerous. The temperature of the return water pipe is usually low, and a temperature lower than 45°C indicates that the heat is not effectively recovered, which may affect the heat exchange efficiency. Therefore, when the return water temperature is lower than 45°C, the system needs to trigger the first-level alarm to indicate that the system is not operating normally. The pipe design of the heat exchange station system usually stipulates that 1.2 times the design pressure is the upper limit, and exceeding this pressure may cause structural damage to the pipe or equipment. Therefore, when the pressure of the water supply pipe exceeds 1.2 times the design pressure, an alarm mechanism is required to warn to prevent damage to the system. Low pressure, such as less than 0.8 times the design pressure, usually indicates that the system cannot maintain sufficient working flow or heat exchange effect, which may lead to insufficient heating or system instability, and an alarm is required to respond. If the flow rate is low, such as less than 80% of the design flow rate, it indicates that the system may have a problem of insufficient flow, which may be due to pump failure or pipeline blockage. At this time, the first-level alarm is used to remind the operator to check the system; when the flow rate exceeds 110% of the design flow rate, it indicates that the system is overloaded and an alarm is needed to warn and take emergency measures.

[0032] The first-level signal alarm is to remind staff that the real-time data of the pipeline system deviates from the reasonable range, and the staff needs to pay attention to the operation of specific system equipment.

[0033] The second-level signal is used to control the PLC controller to adjust the regulating valve. Triggering the second-level signal means that the current real-time data deviates from the preset data range by a large margin. Therefore, the remote monitoring platform needs to send control instructions to the PLC controller. The PLC and controller need to adjust each regulating valve to adjust the operation status.

[0034] The triggering of the third-level signal indicates an emergency situation, some equipment failures, and the heating system is already unavailable, so an emergency handling mechanism needs to be triggered. The emergency handling mechanism includes: automatic shutdown, starting backup equipment, adjusting control parameters, etc. In order to avoid system shutdown and ensure the heating effect, backup equipment is specially set up, such as backup water pumps and backup power supplies. The backup equipment can be started through the PLC controller. In addition, the PLC controller is also required to adjust the valve opening.

[0035] By adopting the above technical solution and setting the above multi-level warning signals, different equipment problems can be dealt with, and users can understand the equipment status in time and take corresponding measures. It can also reduce manual intervention in the event of sudden failures, improve system response speed, and avoid equipment damage and production interruption.

[0036] In one possible implementation, the sensor group includes a temperature sensor, a flow sensor, and a pressure sensor; the pipeline system includes a water supply pipeline and a return pipeline, and the sensor group is installed on both the water supply pipeline and the return pipeline; the temperature sensor is used to monitor water temperature changes in the pipeline system; the pressure sensor is used to monitor pressure changes in the pipeline system; and the flow monitoring device is used to monitor water flow changes in the pipeline system.

[0037] By adopting the above technical solutions, temperature sensors, flow monitoring devices and pressure sensors can comprehensively monitor the temperature, flow and pressure of the heat exchange station. The temperature sensor monitors the water temperature of the pipeline, the pressure sensor monitors the pressure fluctuation at the pipeline inlet, and the flow monitoring device monitors the water flow in the pipeline, providing real-time data support for system adjustment.

[0038] In one possible implementation, the water pump device includes a circulation pump and a water supply pump, each water pump is equipped with a frequency converter; each frequency converter is connected to a PLC controller; the PLC controller is used to control the frequency converter to adjust the speed of the water pump device when the second and third level alarm signals are triggered.

[0039] By adopting the above technical solution, the system adjusts the speed of the water pump through the frequency converter, so that the water pump can adjust the flow rate according to the needs, avoiding system instability caused by excessive or insufficient flow rate. This control method improves energy efficiency, reduces system energy consumption, and provides greater flexibility for emergency response.

[0040] In a possible implementation, the system further includes a pressure relief device connected to a PLC controller, and the PLC controller is used to control the opening and closing of the pressure relief device when the second and third level alarm signals are triggered, thereby adjusting the pressure at the inlet and outlet of the heat exchange station pipeline.

[0041] By adopting the above technical solution, the pressure relief device is connected to the PLC controller, and the pressure relief function can be automatically turned on or off according to the pressure condition of the system. When the system pipeline pressure is too high, the PLC controller can automatically instruct the pressure relief device to discharge the pressure, avoiding the system from bursting or being damaged due to excessive pressure, and ensuring the safety of the system.

[0042] In a possible implementation, the monitoring platform also includes a visualization module and a data management center. The data management center receives data transmitted by the PLC controller and transmits it to the visualization module. The visualization module is used for staff to remotely view the operation status of the heat exchange station.

[0043] In a possible implementation, the system enables operators to remotely view the real-time operation of the heat exchange station through a visualization module and a data management center. Operators can conveniently monitor and manage equipment, improving the operability and usability of the system.

[0044] In a possible implementation, the system further includes a thermal insulation material, which is coated on the water supply pipe, the return pipe, the sensor group and the regulating valve; and is used to reduce heat loss; the thermal insulation material is one of rock wool and polyurethane foam.

[0045] By adopting the above technical solution, the insulation material is coated on the water supply pipe, return pipe and automatic control equipment, which can effectively reduce heat loss and improve the overall thermal efficiency of the system. The thermal efficiency of the system is improved, and energy consumption is reduced, thus achieving the goal of energy conservation and emission reduction.

[0046] In the several embodiments provided in the present application, it should be understood that the disclosed systems, modules and methods can be implemented in other ways. For example, the module embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, modules or units, which can be electrical, mechanical or other forms.

[0047] The above embodiments are only used to illustrate the technical solution of the present application, but not to limit it. The present application is not limited to the exact structure described above and illustrated in the accompanying drawings, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, various changes and modifications made without departing from the concept of the present application should be deemed to belong to the protection scope of the present application.

Claims

1. A heat exchange station automation control system, characterized in that: include: PLC controller, monitoring platform, alarm platform, water pump device, and sensor group and regulating valve installed on the pipeline system; The PLC controller is connected to the sensor group; the PLC controller is connected to the monitoring platform and is used to transmit the data collected by the sensor group to the monitoring platform; The monitoring platform is used to compare the collected data with the preset threshold value, and mark different data as first-level, second-level, and third-level alarm signals according to the comparison results; the monitoring platform is used to send the alarm signal to the alarm platform, and the alarm platform triggers the warning signal, alarm signal, and emergency alarm signal according to the received first-level, second-level, and third-level alarm signals; the monitoring platform is also used to send different instructions to the PLC controller according to different alarm signals; Among them, the warning signal is used to remind that the real-time data of the pipeline system deviates from a reasonable range; the alarm signal is used to control the PLC controller to adjust the regulating valve; the emergency alarm signal will trigger the emergency processing mechanism, and the emergency processing mechanism includes: automatic shutdown, starting backup equipment, and adjusting control parameters; starting the backup equipment includes starting the backup water pump and the backup power supply; adjusting the control parameters includes sending instructions to the PLC controller, and the PLC controller adjusts the opening of the regulating valve.

2. The heat exchange station automation control system according to claim 1, characterized in that: The sensor group includes a temperature sensor, a flow sensor and a pressure sensor; The pipeline system includes a water supply pipeline and a water return pipeline, and a sensor group is installed on both the water supply pipeline and the water return pipeline; The temperature sensor is used to monitor the water temperature change in the pipeline system; The pressure sensor is used to monitor the pressure change of the pipeline system; The flow monitoring device is used to monitor the change of water flow in the pipeline system.

3. The heat exchange station automation control system according to claim 1, characterized in that: The water pump device includes a circulation pump and a water supply pump, each of which is equipped with a frequency converter; each of which is connected to the PLC controller; the PLC controller is used to control the frequency converter to adjust the rotation speed of the water pump device when the second and third level alarm signals are triggered.

4. The heat exchange station automation control system according to claim 1, characterized in that: The system also includes a pressure relief device, which is connected to the PLC controller. The PLC controller is used to control the opening and closing of the pressure relief device when the second and third level alarm signals are triggered, and adjust the pressure of the inlet and outlet of the heat exchange station pipeline.

5. The heat exchange station automation control system according to claim 2, characterized in that: The first-level alarm signal is in the water supply pipeline data range: the temperature sensor monitors the temperature in real time: >85°C, the pressure sensor monitors the pressure in real time: >1.2 times the design pressure, and the flow sensor monitors the water supply flow in real time: <80% of the preset flow; The second-level alarm signal in the water supply pipeline data range: the temperature sensor real-time monitoring temperature: 70-85°C, the pressure sensor real-time monitoring pressure: 0.8-1.2 times the design pressure, the flow sensor real-time monitoring water flow: 80-90% of the preset flow; The third-level alarm signal is in the water supply pipeline data range: the temperature sensor monitors the temperature in real time: <70°C, the pressure sensor monitors the pressure in real time: <0.8 times the design pressure, and the flow sensor monitors the water supply flow in real time: >110% of the preset flow.

6. The heat exchange station automation control system according to claim 2, characterized in that: The first-level alarm signal is in the return pipe data range: the temperature sensor monitors the temperature in real time: <45°C, the pressure sensor monitors the pressure in real time: >1.2 times the design pressure, and the flow sensor monitors the water supply flow in real time: <80% of the preset flow; The second-level alarm signal in the return pipe data range: the temperature sensor real-time monitors the temperature: 45-55°C, the pressure sensor real-time monitors the pressure: 0.8-1.2 times the design pressure, the flow sensor real-time monitors the water supply flow: 80-90% of the preset flow; The third-level alarm signal in the return pipe data range: the temperature sensor real-time monitors the temperature: >60°C, the pressure sensor real-time monitors the pressure: <0.8 times the design pressure, and the flow sensor real-time monitors the water supply flow: >110% of the preset flow.

7. The heat exchange station automation control system according to claim 1, characterized in that: The monitoring platform also includes a visualization module and a data management center. The data management center receives data transmitted by the PLC controller and transmits it to the visualization module. The visualization module is used for the staff to remotely view the operation status of the heat exchange station.

8. The heat exchange station automation control system according to claim 2, characterized in that: The system also includes a heat-insulating material, which is coated on the water supply pipe, the return pipe, the sensor group and the regulating valve; and is used to reduce heat loss; the heat-insulating material is one of rock wool and polyurethane foam.

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