Electric heat tracing system control method and device, medium, equipment and program product

Abstract

The invention relates to an electric heat tracing system control method and device, a medium, equipment and a program product, and the method comprises the steps: responding to the operation starting of an electric heat tracing system, and determining the equipment type of heat-traced target equipment in a coal liquefaction system; according to the equipment type of the heat-traced target equipment, a corresponding heat-tracing temperature control strategy is determined, and in the heat-tracing temperature control strategy, the temperature for executing heat-tracing temperature rising is gradually increased; and according to the heat tracing temperature control strategy, electric heat tracing of the heat-traced target equipment is controlled through a distributed controller of the electric heat tracing system. In the heat tracing temperature control strategy, the mode that the temperature for executing heat tracing temperature rising is gradually increased is adopted, and on the basis that it is guaranteed that the heat tracing efficiency is improved, it can be effectively avoided that due to the fact that the required temperature is directly heated at a time, the temperature of target equipment is rapidly changed, and heat expansion damages to heat-traced target equipment are caused. And the problems of large temperature fluctuation, non-uniform heat tracing and the like in a traditional control mode can be avoided.

Description

Technical Field

[0001] This disclosure relates to the field of industrial automation control technology, specifically to a control method, device, medium, equipment, and program product for an electric heat tracing system. Background Technology

[0002] In industrial production, electric heat tracing systems are widely used to prevent pipelines and valves from freezing and leaking due to excessively low temperatures during operation. In the direct coal liquefaction process, the stable operation of electric heat tracing systems is crucial for ensuring the smooth operation of the entire production process. These systems continuously provide necessary temperature protection for pipelines, valves, and other process equipment, effectively preventing potential leaks caused by low temperatures, such as media solidification, equipment freezing, and shrinkage, thereby ensuring the continuity and safety of production process switching. Summary of the Invention

[0003] The purpose of this disclosure is to provide a control method, apparatus, medium, equipment, and program product for an electric heat tracing system.

[0004] To at least solve the above-mentioned technical problems, a first aspect of the present disclosure provides a method for controlling an electric heat tracing system, comprising: In response to the operation start operation of the electric heat tracing system on the operation interface, the equipment type of the target equipment to be heat-traced in the coal liquefaction system is determined. Based on the equipment type of the target equipment being heated, a corresponding heating temperature control strategy is determined, wherein the temperature at which the heating temperature is increased is increased sequentially in the heating temperature control strategy. According to the heat tracing temperature control strategy, the distributed controller of the electric heat tracing system performs electric heat tracing control on the target device being traced.

[0005] Optionally, determining the corresponding heat tracing temperature control strategy based on the equipment type of the target heat-traced device includes: Obtain the initial temperature data of the heat tracing device corresponding to the target heat-traced equipment; The required temperature of the target device to be heated is determined based on the device type of the target device. Based on the required temperature of the target heat-traced device and the initial temperature data of the corresponding heat-tracing device, a corresponding heat-tracing temperature control strategy is determined.

[0006] Optionally, determining the corresponding heat tracing temperature control strategy based on the required temperature of the target heat-traced device and the corresponding initial temperature data of the heat tracing device includes: Based on the required temperature of the target device being heated and the corresponding initial temperature data of the heating device, determine the temperature value at which the heating device increases the heating temperature each time it performs the heating temperature increase and the duration of the heating hold after each increase in the heating temperature. Based on the temperature value of the temperature increase each time the heat tracing device performs the temperature increase and the heat tracing duration after each temperature increase, a corresponding heat tracing temperature control strategy is determined.

[0007] Optionally, the method further includes: Acquire real-time temperature data corresponding to the target device being heated, wherein the real-time temperature data includes the temperature data of the target device being heated and / or the temperature data of the heating device corresponding to the target device being heated; Based on the real-time temperature data described above, determine whether a heat tracing warning is required; In the event of a heat tracing warning, identify the interlocking heat tracing device corresponding to the target heat-traced equipment; The interlock start / stop information of the interlocked heat tracing device is generated, and the interlock start / stop information is sent to the interlocked heat tracing device to perform the interlock start / stop operation.

[0008] Optionally, the method further includes: Acquire target data for each of the heat-traced target devices, wherein the target data includes at least one of the following: real-time temperature data, fault alarm data, and historical temperature data; Based on the target data of the heat-traced target device, target display information is generated, which is used to draw a monitoring view on the operation interface.

[0009] Optionally, the method further includes: In response to a heat tracing control operation on the operating interface, control information for the heat tracing device in the electric heat tracing system is determined, wherein the heat tracing control operation is a control operation for the heat tracing device corresponding to the target heat-traced device. Based on the control information, target control information is generated, which is then sent to the corresponding heat tracing device to perform heat tracing and heating control.

[0010] A second aspect of this disclosure provides an electric heat tracing system control device, comprising: The first determining module is configured to determine the equipment type of the target equipment being heated in the coal liquefaction system in response to an operation start-up operation of the electric heat tracing system on the operation interface. The second determining module is configured to determine a corresponding heat tracing temperature control strategy based on the equipment type of the target heat-traced device, wherein the temperature at which the heat tracing temperature is increased is increased sequentially in the heat tracing temperature control strategy. The control module is configured to perform electric heat tracing control on the target device being traced through the distributed controller of the electric heat tracing system, according to the heat tracing temperature control strategy.

[0011] A third aspect of this disclosure provides a non-transitory computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the steps of the method described in any of the first aspects.

[0012] A fourth aspect of this disclosure provides an electronic device comprising: A memory on which computer programs are stored; A processor for executing the computer program in the memory to implement the steps of the method of any one of the first aspects.

[0013] A fifth aspect of this disclosure provides a computer program product including a computer program that, when executed by a processor, implements the steps of the method described in any one of the first aspects.

[0014] The above technical solution can achieve at least the following beneficial effects: When the electric heat tracing system is activated, a heat tracing temperature control strategy can be determined based on the type of the target equipment. This strategy employs a gradual increase in the temperature required to raise the heat tracing level. This approach effectively avoids the risk of rapid temperature changes and thermal expansion damage to the target equipment caused by directly heating to the required temperature all at once, while ensuring high heat tracing efficiency. It also avoids problems such as large temperature fluctuations and uneven heat tracing common in traditional control methods, better adapting to different equipment characteristics and ensuring stable equipment operation. Furthermore, through the distributed controller of the electric heat tracing system, the target equipment is controlled according to the predetermined strategy, achieving intelligent and precise control. This improves heat tracing efficiency, reduces energy consumption, minimizes manual intervention, and enhances the flexibility of heat tracing control, significantly improving the overall convenience, reliability, and economy of the coal liquefaction system.

[0015] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a flowchart of a control method for an electric heat tracing system provided in an embodiment of this disclosure.

[0017] Figure 2 This is a schematic diagram of the architecture of an electric heat tracing system provided in the embodiments of this disclosure.

[0018] Figure 3 This is an implementation provided in the embodiments of this disclosure. Figure 1 The flowchart for step S12.

[0019] Figure 4 This is an implementation provided in the embodiments of this disclosure. Figure 2 The flowchart for step S123.

[0020] Figure 5 This is a flowchart of a process for increasing the temperature of a heat tracing device according to an embodiment of this disclosure.

[0021] Figure 6 This is a block diagram of an electric heat tracing system control device provided in the embodiments of this disclosure.

[0022] Figure 7 This is a block diagram of an apparatus for controlling an electric heat tracing system according to an embodiment of the present disclosure. Detailed Implementation

[0023] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0024] It should be noted that all actions involving the acquisition of signals, information, or data in this disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the location is situated, and with authorization from the owner of the relevant device.

[0025] Before introducing the electric heat tracing system control method provided in the embodiments of this disclosure, we first introduce the technical problems existing in the relevant scenario. In the field of direct coal liquefaction into liquid fuel, direct coal liquefaction units are usually equipped with electric heat tracing systems for the bottom five-way valve of the thermal high-pressure separator, high-temperature and high-pressure pipelines, high-pressure differential liquid control valves, and other important valves. The electric heat tracing system adopts an automatic control method using a field temperature controller or a PLC (Programmable Logic Controller).

[0026] However, due to the harsh on-site environment and the poor stability of the temperature controller itself, the process personnel have difficulty operating it, and the original system is old, resulting in a high failure rate of the system. It is also inconvenient for process personnel to operate and control it in a timely manner, and there are even cases where the heating rises too fast or too slow, causing temperature runaway and equipment damage, which often leads to production stoppages.

[0027] First, the harsh on-site environment may include extreme temperature fluctuations, high humidity, corrosive gases, or dust. These factors directly affect the operational stability and reliability of the temperature controller, as well as the ease of operation for personnel. Prolonged exposure to such environments can easily damage the electronic components of the temperature controller, reduce sensor accuracy, and lead to inaccurate measurements, thus affecting the control effect.

[0028] In addition, the stability of the thermostat itself is also one of the reasons for frequent failures. Some thermostats have poor shock resistance, anti-interference ability, and long-term operational stability. In actual use, thermostats not only frequently malfunction, fail to respond, or experience temperature runaway, increasing maintenance costs, but also seriously threaten the safe operation of critical equipment, potentially leading to production interruptions, equipment damage, or even more serious safety accidents.

[0029] Secondly, due to the thermal inertia of the controlled object, the sensor response time, the controller processing speed, and the actuator action time, the temperature controller has a lag when performing temperature control. This lag will lead to slow system response, reduced control accuracy, and deviations.

[0030] Furthermore, due to issues with the stability and accuracy of the thermostat, as well as the influence of the ambient environment on the sensor, temperature control becomes inaccurate, failing to precisely maintain the set temperature and potentially causing temperature fluctuations or even loss of control. Lacking advanced control algorithms and intelligent control strategies, the thermostat cannot achieve more precise and efficient temperature control based on changes in ambient temperature, thus increasing energy consumption and the risk of malfunction.

[0031] Furthermore, since the electric heat tracing systems of each system operate independently without centralized control and monitoring, it is extremely inconvenient for operators to perform operations on-site, and the ease of use and maintenance is low.

[0032] In view of this, the present disclosure provides a control method for an electric heat tracing system to adapt to the complex production needs and higher safety standards in the scenario of direct coal liquefaction into liquid fuels, so as to improve the stability and reliability of the electric heat tracing system, reduce the failure rate and maintenance costs, and ensure that process pipelines and valves can operate safely and stably in various harsh environments, thus providing a guarantee for the stable operation of direct coal liquefaction into liquid fuels.

[0033] Figure 1 This is a flowchart and block diagram illustrating a control method for an electric heat tracing system according to an exemplary embodiment. This method can be applied, for example, to a distributed electric heat tracing system, wherein... (See also...) Figure 2As shown, a distributed electric heat tracing system may include: a heat tracing device corresponding to the target equipment being heat-traced, a control cabinet based on a DCS (Distributed Control System), a server, and a central control device deployed in a central control room. The heat tracing device may be composed of a resistance temperature detector (RTD) connected to a heat tracing wire, which can be arranged on the target equipment by means of attachment or winding, for example. The control cabinet is communicatively connected to the heat tracing device via, for example, a bus. The control cabinet and the server, and the server and the central control device, are communicatively connected via Ethernet or an industrial bus. The electric heat tracing system control method provided in this embodiment can be executed by the control cabinet or by the server, thus utilizing the powerful data processing and network communication capabilities of the DCS to achieve remote centralized monitoring and automated control of the electric heat tracing system.

[0034] Further, see Figure 1 As shown, the control method for the electric heat tracing system includes the following steps.

[0035] In step S11, in response to the operation start operation of the electric heat tracing system on the operation interface, the equipment type of the target equipment to be heat-traced in the coal liquefaction system is determined.

[0036] In this embodiment of the disclosure, the user interface is typically developed based on a specific graphical user interface framework, which includes a built-in event listening mechanism. When the user clicks the "Start Electric Heat Tracing System" button on the user interface, the interface will capture the click event.

[0037] In this embodiment of the disclosure, the database or configuration file of the electric heat tracing system will pre-store relevant information of each device in the coal liquefaction system, including device ID, device name, device type, etc. This information is stored in a structured manner, such as using the table structure of a relational database, or configuration files in formats such as JSON or XML.

[0038] In addition to the "Run / Start" button, the user interface may also display a device selection list or drop-down menu, from which the user needs to select the target device to be heated. After the user completes the selection and clicks the "Run / Start" button, the event handler will obtain the identifier of the selected device (such as the device ID). Then, it will query the corresponding device type information from the database or configuration file based on this identifier.

[0039] In step S12, a corresponding heat tracing temperature control strategy is determined according to the equipment type of the target device being heat-traced, wherein the temperature for increasing the heat tracing temperature in the heat tracing temperature control strategy is increased sequentially.

[0040] In this embodiment of the disclosure, a series of heat tracing temperature control strategy templates are predefined for different types of heat-traced equipment in the coal liquefaction system. These templates take into account the characteristics of the equipment, such as the material, working medium, and normal operating temperature range. For example, for some equipment that is sensitive to temperature changes, the control strategy may be more gradual; while for some high-temperature resistant equipment that needs to reach the heat tracing temperature quickly, the control strategy may be more aggressive.

[0041] The software for an electric heat tracing system establishes a mapping table between device types and heat tracing temperature control strategy templates. This table can be stored in a database or implemented as a dictionary or hash table in the code. Once the device type of the target device being traced is determined, the software quickly finds the corresponding heat tracing temperature control strategy template based on this mapping table.

[0042] The heat tracing temperature control strategy template defines a series of parameters to control the temperature increase process. The rule for progressively increasing the temperature can be achieved by setting parameters such as the initial temperature, the magnitude of each temperature increase, and the interval between increases. For example, the initial temperature can be set to the ambient temperature or the initial temperature of the heat tracing device. The first temperature increase is set to 5°C, with a 10-minute interval. The second temperature increase is set to twice the first (10°C), with the same 10-minute interval. The third temperature increase is set to three times the first (15°C), with the same 10-minute interval, and so on. Each subsequent temperature increase doubles the initial increase, thus achieving a progressively increasing temperature for the heat tracing system.

[0043] In this way, the heat tracing temperature can be gradually increased, which can ensure the long-term stable operation of the electric heat tracing temperature control system, avoid damage to the medium pipeline and valve internals caused by excessively rapid temperature increase at one time, and ultimately ensure the long-term stable operation of the device.

[0044] In step S13, according to the heat tracing temperature control strategy, the electric heat tracing control of the target device is executed through the distributed controller of the electric heat tracing system.

[0045] In this embodiment of the disclosure, after receiving the heat tracing temperature control strategy and the current temperature of the device from the server, the distributed controller executes the corresponding control algorithm. For example, a PID (Proportional-Integral-Derivative) control algorithm is used to calculate the control output based on the deviation between the current temperature and the target temperature. This output is then used to adjust the power of the electric heat tracing device, thereby controlling the rise in the heat tracing temperature.

[0046] The distributed controller adjusts the power supply of the electric heat tracing equipment through control circuits based on the output calculated by the control algorithm. For example, it adjusts the effective value of the AC power by controlling the conduction angle of the thyristors, thereby changing the heating power of the electric heat tracing equipment. As the power is adjusted, the electric heat tracing equipment heats the target equipment according to the rule of gradually increasing the temperature set in the heat tracing temperature control strategy until the target temperature is reached and maintained.

[0047] In this embodiment of the disclosure, according to the heat tracing temperature control strategy, a corresponding control signal for the heat tracing device is generated and output to the heat tracing device through the digital output module of the DCS, thereby accurately controlling the on / off state of the electric heat tracing device and realizing precise temperature adjustment and stable control.

[0048] It can be explained that by implementing the above-mentioned scheme to achieve precise control of the electric heat tracing heating process, including the formulation and execution of strategies for gradual temperature increase and maintaining the temperature gradient for a specific duration, the stability and reliability of the electric heat tracing system can be significantly improved, the failure rate and maintenance costs reduced, and more precise and efficient temperature control achieved. This improves the accuracy and response speed of temperature control and greatly enhances the system's intelligence and automation level. This provides a solid guarantee for the stable operation of the equipment in the engineering development project of the second-generation direct coal liquefaction technology, and helps the project achieve its goals of improving coal conversion efficiency, reducing costs, and reducing pollution.

[0049] It can be explained that after deploying the control cabinet based on the DCS, the original field control system and temperature controller can be removed; at the same time, the local operation panel, power cabinet, etc., can also be removed. New cables, safety barriers, and relays are added from the field to the DCS control cabinet, allowing them to connect directly to the DCS system. The sequential control logic of the SCM (Sequential Control Module) is configured through the DCS control system server, and then downloaded to the system.

[0050] Meanwhile, the existing distribution panels, heat tracing circuit panels, thermocouples, some thermocouple acquisition boxes, and heat tracing cables were retained. The process operation screens were redesigned, unifying all measurement points into the existing system for centralized management and distributed control. The temperature measurement function of the thermocouples remained unchanged. Thermocouple signals, originally used only for display, will now serve as input signals to the DCS control cabinet. After logic processing in the DCS system, they will be output to control the start and stop of the heat tracing cables, thus making control more precise. This significantly reduces the number of devices on-site, thereby reducing the frequency of periodic calibrations and saving considerable time and manpower costs for on-site operation and maintenance. It effectively avoids the problems of multiple operating system types and maintenance difficulties. Furthermore, the on-site operation panels were removed, and control was moved to the DCS control room, providing convenience for process personnel. Most importantly, the electric heat tracing control logic was comprehensively optimized, protecting both production equipment and property, precisely controlling the temperature rise rate, and greatly extending the service life of the equipment.

[0051] When the electric heat tracing system is activated, the above-mentioned technical solution can determine the heat tracing temperature control strategy based on the type of the target equipment. This strategy employs a gradual increase in the temperature required to raise the heat tracing level. While ensuring improved heat tracing efficiency, it effectively avoids the risk of drastic temperature changes and thermal expansion damage to the target equipment caused by directly heating to the required temperature all at once. It also avoids problems such as large temperature fluctuations and uneven heat tracing found in traditional control methods, better adapting to different equipment characteristics and ensuring stable equipment operation. Furthermore, through the distributed controller of the electric heat tracing system, the target equipment is controlled according to the predetermined strategy, achieving intelligent and precise control. This improves heat tracing efficiency, reduces energy consumption, minimizes manual intervention, enhances the flexibility of heat tracing control, and significantly improves the overall convenience, reliability, and economy of the coal liquefaction system.

[0052] Optionally, see Figure 3 As shown, in step S12, determining the corresponding heat tracing temperature control strategy based on the equipment type of the target heat-traced device includes: In step S121, the initial temperature data of the heat tracing device corresponding to the target heat-traced device is obtained.

[0053] In this embodiment of the disclosure, the temperature sensor converts the temperature of the heating device into an electrical signal. Different types of sensors use different conversion methods. For example, a thermocouple utilizes the thermoelectric effect; when the two ends of a circuit composed of two different metals are at different temperatures, a thermoelectric electromotive force is generated, and the temperature value can be obtained by measuring this thermoelectric electromotive force. A resistance temperature detector (RTD) utilizes the characteristic that the resistance of a metal changes with temperature; the temperature is calculated by measuring the resistance value. These electrical signals are usually weak analog signals and need to be amplified and conditioned.

[0054] In this embodiment, the analog signal output by the sensor is first amplified and filtered to eliminate noise and interference and improve signal quality. Then, the analog signal is converted into a digital signal by an analog-to-digital converter (ADC) for processing by a computer or other digital device. The resolution of the ADC determines the accuracy of the temperature measurement; higher resolution allows for the differentiation of smaller temperature changes. The acquisition module also encodes and packages the digital signal for transmission to a server or control cabinet via a communication interface.

[0055] In step S122, the required temperature of the target device being heated is determined according to the device type of the target device being heated.

[0056] In this embodiment, equipment made of different materials has different temperature tolerances. For example, plastic equipment can generally only be used in a lower temperature range; excessively high temperatures can cause the plastic to deform, soften, or even decompose. Metal equipment, on the other hand, has higher temperature resistance, but different metals have different melting points and coefficients of thermal expansion. When determining the required temperature, the required temperature for different seasons can be set in advance according to process requirements, equipment material specifications, and relevant standards to ensure that the temperature is within the allowable range of the equipment material.

[0057] For example, a database containing various equipment types and their corresponding temperature requirements can be established. This database can be built by collecting data from actual production, referencing relevant industry standards and technical documents, etc. When determining the required temperature for equipment, the required temperatures of the same or similar equipment types can be retrieved from the database as a reference.

[0058] In step S123, a corresponding heat tracing temperature control strategy is determined based on the required temperature of the target heat-traced device and the initial temperature data of the corresponding heat tracing device.

[0059] In this embodiment, the difference between the initial temperature of the heat tracing device and the required temperature is first calculated. This temperature difference reflects the degree to which the heat tracing device needs to raise the temperature, and different temperature differences require different control strategies. If the temperature difference is small, it indicates that the initial temperature of the heat tracing device is close to the required temperature, and a more gradual control strategy can be adopted to avoid overheating and causing equipment damage or energy waste. For example, a smaller heating power or a longer heating interval can be used. If the temperature difference is large, a more aggressive control strategy is required to raise the temperature to the required temperature as quickly as possible. For example, a larger heating power or a shorter heating interval can be used.

[0060] Furthermore, based on the magnitude of the temperature difference, the heat tracing process is divided into multiple stages, each employing different control parameters. For example, in the initial stage, when the temperature difference is large, a smaller heating power can be used to raise the temperature, and then the temperature increase can be gradually increased. The segmented control algorithm can achieve the division of stages by setting multiple temperature thresholds, each threshold corresponding to different control parameters.

[0061] Optionally, see Figure 4 As shown, in step S123, determining the corresponding heat tracing temperature control strategy based on the required temperature of the target heat-traced device and the corresponding initial temperature data of the heat tracing device includes: In step S1231, based on the required temperature of the target device being heated and the initial temperature data of the corresponding heating device, the temperature value of each heating temperature increase performed by the heating device and the heating duration after each heating temperature increase are determined.

[0062] First, calculate the total temperature difference between the initial temperature of the heat tracing device and the required temperature of the target equipment. Then, based on the preset number of segments, distribute the total temperature difference evenly across each heating process, i.e., the temperature value of each heating step. Considering that the equipment has different sensitivities to temperature changes in different temperature ranges, to prevent sudden use of higher temperatures and large temperature increases that could damage pipes or valves due to thermal expansion when the temperature is far from the required temperature, it is advisable to initially determine that the temperature range is smaller at the beginning and larger at the end.

[0063] In this embodiment of the disclosure, after the heat tracing device completes one heating cycle, it needs to maintain a certain temperature for a period of time to allow the equipment to reach thermal equilibrium. The thermal equilibrium time of the equipment depends on factors such as the equipment's heat capacity, thermal conductivity, and the heating power of the heat tracing device. The thermal equilibrium time of different equipment under different operating conditions can be determined experimentally.

[0064] See Figure 5As shown, in step S51, the initial temperature A℃ of the heat tracing device is acquired; in step S52, the heat tracing temperature is increased by X℃ based on A℃, with an allowable error increase of ±Y℃, where Y can be 5. Then, when the temperature reaches (A+X)±5℃, step S53 is executed, and timing is started, maintaining the increased temperature for N hours; in step S54, after the timing reaches N hours, the heat tracing temperature is increased again by 2X℃ based on (A+X)±5℃, again with an allowable error increase of ±Y℃; then, when the temperature reaches (A+3X)±5℃, step S55 is executed, and timing is started again, maintaining the increased temperature for N hours, and so on, repeatedly increasing the heat tracing temperature and starting timing N, with each temperature increasing by X℃ compared to the previous one. In step S56, when the temperature of the heat tracing device reaches the required temperature, real-time temperature data corresponding to the heat-traced target device is acquired, and monitoring is performed.

[0065] In step S1232, a corresponding heat tracing temperature control strategy is determined based on the temperature value of each heat tracing temperature increase performed by the heat tracing device and the heat tracing holding time after each heat tracing temperature increase.

[0066] In this embodiment, a sequential control process is constructed based on the determined temperature values ​​for each heating step and the heat tracing holding time. For example, the heat tracing device is first controlled to heat according to the first heating temperature value. After reaching this temperature value, it enters the heat tracing holding stage and holds for the set time. Then, a second heating step is performed, and the above process is repeated until the equipment temperature reaches the required temperature. This sequential control process is simple to understand and easy to implement, and is suitable for scenarios where the control accuracy requirements are not high and the temperature change process is relatively simple.

[0067] Optionally, the method further includes: Acquire real-time temperature data corresponding to the target device being heated, wherein the real-time temperature data includes the temperature data of the target device being heated and / or the temperature data of the heating device corresponding to the target device being heated; In this embodiment, a temperature sensor is installed between the heat tracing wire and the target device being heat-traced, enabling real-time temperature data measurement. The measured temperature data is transmitted via a transmitter to the safety barrier between the DCS cabinets, and then the safety barrier transmits it to the AI ​​(Analog) card. After processing by the card, the temperature data is transmitted to the controller. The controller further processes the data before transmitting it to the switch. The server and operator station use the switch for data reading, control, alarm, and interlocking to start and stop the on-site electric heat tracing.

[0068] Based on the real-time temperature data described above, determine whether a heat tracing warning is required; In this embodiment of the disclosure, a reasonable temperature threshold is set according to the process requirements of the target equipment being heated and the design parameters of the heating device. For the target equipment being heated, an upper temperature threshold and a lower temperature threshold need to be set. The upper temperature threshold is to prevent excessively high equipment temperatures from causing damage or affecting product quality, while the lower temperature threshold is to ensure the normal operation of the equipment and the fulfillment of process requirements. For example, some media may solidify or increase in viscosity at low temperatures, affecting the equipment's transport and operation.

[0069] Similarly, temperature thresholds also need to be set for heat tracing devices. For example, the upper temperature threshold for electric heat tracing devices is to prevent overheating of the heat tracing cable from causing fires and other safety accidents; the lower temperature threshold is to ensure that the heat tracing device can provide sufficient heat to meet the heat tracing needs of the target equipment.

[0070] In this embodiment of the disclosure, the real-time temperature data of the target device and the heat tracing device are collected and compared with the set temperature thresholds. If the temperature of the target device exceeds the upper temperature threshold or falls below the lower temperature threshold, or if the temperature of the heat tracing device exceeds its set upper or lower temperature threshold, a heat tracing warning is determined to be in effect.

[0071] In the event of a heat tracing warning, identify the interlocking heat tracing device corresponding to the target heat-traced equipment; In this embodiment of the disclosure, when the target equipment being heated experiences an overheating warning, it may be necessary to interlock and stop the operation of some or all of the heating devices to reduce the equipment temperature. For example, for an electrically heated valve, when the valve temperature exceeds the upper limit threshold, the electric heating device of the valve and the electric heating devices of the valve or pipeline upstream of the valve may be interlocked and stopped.

[0072] In this embodiment of the disclosure, in the presence of heat tracing warnings, such as over-temperature protection, fault self-diagnosis and alarms, the power supply can be cut off in a timely manner to prevent equipment damage or safety accidents.

[0073] In this embodiment, the safety protection system sends commands to the DO in the CM through logical judgment in the sequential control, controlling the relay to control the electric heat tracing heating. Simultaneously, by detecting the real-time temperature value input by the AI, an alarm and alarm level are set for that temperature value, and an alarm is issued using an audible and visual alarm device. The thermocouple signal from the normal circuit is acquired by the thermocouple and transmitted to the DCS cabinet via a transmitter and safety barrier. The temperature signal is then sent to the operator station via a switch cabinet for display or alarm.

[0074] The interlock start / stop information of the interlocked heat tracing device is generated, and the interlock start / stop information is sent to the interlocked heat tracing device to perform the interlock start / stop operation.

[0075] In this embodiment, precise temperature control, stepped heating, and timed temperature maintenance are provided for the heat tracing devices of various target devices. Each type of heat tracing device has its own independent sequential control loop, enabling independent heating. When the electric heat tracing device is in normal operation, the human-machine interface unit can monitor its operating status in real time. If overheating or a temperature value lower than the target value occurs, the sequential control loop will start and stop the heat tracing loop according to logical judgment, without affecting the normal operation of other electric heat tracing loops.

[0076] Optionally, the method further includes: Acquire target data for each of the heat-traced target devices, wherein the target data includes at least one of the following: real-time temperature data, fault alarm data, and historical temperature data.

[0077] In this embodiment, the electrical signal output by the temperature sensor is received to obtain real-time temperature data and historically reported electrical signals from the temperature sensor, thus obtaining historical temperature data. Fault alarm data can be fault data reported when the temperature sensor is unable to collect data.

[0078] Based on the target data of the heat-traced target device, target display information is generated, which is used to draw a monitoring view on the operation interface.

[0079] In this embodiment, the target display information can be used to create intuitive and easy-to-use operation and monitoring screens, including real-time temperature display, fault alarms, and historical data queries. This facilitates operators in monitoring the operating status of the electric heat tracing system in real time and responding quickly to abnormal situations. This enables accurate adjustment of the electric heat tracing temperature, real-time monitoring of the target heating temperature, and the ability to maintain gradient temperature rise and heating time for specific durations, greatly improving the stability, reliability, and visibility of the electric heat tracing temperature control.

[0080] In this embodiment of the disclosure, the user interface can be configured with a one-click start / stop soft button and a monitoring view using a scripting language. The scripting language is written using drawing software, and the one-click start / stop soft button is configured.

[0081] In this embodiment of the disclosure, data from different devices can be integrated based on information such as device identification or location, thereby comparing and analyzing real-time temperature data and historical temperature data of the same device to observe the temperature change trend of the device; fault alarm data can be combined with real-time temperature data to analyze the temperature status of the device when a fault occurs, so as to display the operating status of multiple devices in a unified view on the operation interface.

[0082] In this embodiment of the disclosure, a suitable monitoring view type is selected based on the operator's needs and the characteristics of the target equipment being heated. For example, the monitoring view type may include line charts, bar charts, pie charts, dashboards, etc.

[0083] Line charts are suitable for displaying the temperature trend of equipment over time. Operators can observe the trend of the line to determine whether the equipment temperature is stable and whether there are abnormal fluctuations. Bar charts can be used to compare temperature data from different devices or temperature data from the same device at different time periods. Pie charts are suitable for displaying the proportional distribution of equipment fault alarms. For example, by counting the number of different types of fault alarms over a period of time, a pie chart can clearly show the proportion of each type of fault alarm, making it easier for operators to determine the priority of fault handling. Dashboards can simulate traditional instrument displays, intuitively displaying key information such as real-time temperature and fault status of the equipment. For example, using a pointer-type dashboard to display the current temperature of the equipment allows operators to understand the temperature status of the equipment at a glance.

[0084] A well-designed view layout can improve the usability of the user interface and the effectiveness of information display. A partitioned layout is used to categorize and display different types of monitoring views. For example, the real-time temperature monitoring view is placed at the top of the interface, the fault alarm monitoring view is in the middle, and the historical temperature analysis view is at the bottom.

[0085] Optionally, the method further includes: In response to a heat tracing control operation on the operating interface, control information for the heat tracing device in the electric heat tracing system is determined, wherein the heat tracing control operation is a control operation for the heat tracing device corresponding to the target heat-traced equipment.

[0086] The user interface is typically based on a specific software development framework, and event listeners are set for various elements (such as buttons, sliders, switches, etc.) on the interface. Taking a button as an example, when a user clicks the button controlling the heating device on the interface, a click event is triggered. The event listener will capture this event and pass the relevant information of the event (such as event type, trigger element identifier, etc.) to the event handler function.

[0087] Furthermore, after receiving the event information, the event handling function will identify and parse the operation. For example, if the user clicks a slider used to adjust the power of the heat tracing device, the event handling function will obtain the current position value of the slider and convert the slider position into a specific power value according to the pre-set mapping relationship between slider position and power value.

[0088] For switch-type operations (such as turning the heat tracing device on or off), the event handler function directly identifies the switch state change and converts it to the corresponding Boolean value (true for on, false for off). Simultaneously, it determines which heat tracing device the operation targets based on the layout and element identifiers of the user interface. For example, each heat tracing device may have a unique ID or name identifier on the user interface; by retrieving the identifier associated with the element that triggered the operation, the corresponding target heat tracing device can be accurately located.

[0089] Based on the control information, target control information is generated, which is then sent to the corresponding heat tracing device to perform heat tracing and heating control.

[0090] In this embodiment, a series of control strategies can be predefined, which are determined according to different operation types and the needs of the target equipment being heated. For example, for process pipelines requiring precise temperature control, the control strategy for the heating device may include a PID control strategy based on the temperature setpoint. After the user sets the target temperature of the process pipeline on the operating interface, the power required to be output by the heating device can be calculated according to the current real-time temperature data and the target temperature using a PID control algorithm. The output power corresponds to the temperature rise, that is, after each power output, a preset time is waited before the power is increased again, and the output power is increased sequentially.

[0091] Optionally, the target equipment to be heated includes at least one of the following: process piping and process valves.

[0092] In this embodiment of the disclosure, the temperature signal detection unit of the heat tracing device may include a resistance temperature detector (RTD), a heat tracing wire, and a temperature sensor. The RTD is connected to the heat tracing wire, and the temperature sensor collects the surface temperature of the process pipeline and process valve where the electric heat tracing circuit is located, as well as the ambient temperature.

[0093] In this embodiment of the disclosure, an insulation layer can be provided on the surface of process pipelines and process valves. The insulation layer can be replaced manually by obtaining the ambient temperature. For example, a thicker insulation layer with better heat insulation can be used in winter, and a thinner insulation layer with poorer heat insulation can be used in summer.

[0094] The above technical solution, through the implementation of gradual temperature increase, effectively avoids the impact of sudden temperature changes on process valves and pipelines, thus extending the service life of the equipment. Meanwhile, the optimization of DCS sequential control and the human-machine interface makes system operation more convenient and monitoring more comprehensive.

[0095] Based on the same concept, this disclosure also provides a control device for an electric heat tracing system, see [link to relevant documentation]. Figure 6 As shown, it includes: The first determining module 610 is configured to determine the equipment type of the target equipment being heated in the coal liquefaction system in response to an operation start operation of the electric heat tracing system on the operation interface. The second determining module 620 is configured to determine a corresponding heat tracing temperature control strategy based on the equipment type of the target heat-traced device, wherein the temperature at which the heat tracing temperature is increased is increased sequentially in the heat tracing temperature control strategy. The control module 630 is configured to perform electric heat tracing control on the target device being traced through the distributed controller of the electric heat tracing system in accordance with the heat tracing temperature control strategy.

[0096] Optionally, the second determining module 620 is configured to: Obtain the initial temperature data of the heat tracing device corresponding to the target heat-traced equipment; The required temperature of the target device to be heated is determined based on the device type of the target device. Based on the required temperature of the target heat-traced device and the initial temperature data of the corresponding heat-tracing device, a corresponding heat-tracing temperature control strategy is determined.

[0097] Optionally, the second determining module 620 is configured to: Based on the required temperature of the target device being heated and the corresponding initial temperature data of the heating device, determine the temperature value at which the heating device increases the heating temperature each time it performs the heating temperature increase and the duration of the heating hold after each increase in the heating temperature. Based on the temperature value of the temperature increase each time the heat tracing device performs the temperature increase and the heat tracing duration after each temperature increase, a corresponding heat tracing temperature control strategy is determined.

[0098] Optionally, the device further includes: an early warning aircraft control module, configured as follows: Acquire real-time temperature data corresponding to the target device being heated, wherein the real-time temperature data includes the temperature data of the target device being heated and / or the temperature data of the heating device corresponding to the target device being heated; Based on the real-time temperature data described above, determine whether a heat tracing warning is required; In the event of a heat tracing warning, identify the interlocking heat tracing device corresponding to the target heat-traced equipment; The interlock start / stop information of the interlocked heat tracing device is generated, and the interlock start / stop information is sent to the interlocked heat tracing device to perform the interlock start / stop operation.

[0099] Optionally, the apparatus further includes: an acquisition and generation module, configured to: Acquire target data for each of the heat-traced target devices, wherein the target data includes at least one of the following: real-time temperature data, fault alarm data, and historical temperature data; Based on the target data of the heat-traced target device, target display information is generated, which is used to draw a monitoring view on the operation interface.

[0100] Optionally, the apparatus further includes: a determining and generating module, configured to: In response to a heat tracing control operation on the operating interface, control information for the heat tracing device in the electric heat tracing system is determined, wherein the heat tracing control operation is a control operation for the heat tracing device corresponding to the target heat-traced device. Based on the control information, target control information is generated, which is then sent to the corresponding heat tracing device to perform heat tracing and heating control.

[0101] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0102] A third aspect of this disclosure provides a non-transitory computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the steps of the method described in any of the first aspects.

[0103] A fourth aspect of this disclosure provides an electronic device comprising: A memory on which computer programs are stored; A processor for executing the computer program in the memory to implement the steps of the method of any one of the first aspects.

[0104] A fifth aspect of this disclosure provides a computer program product including a computer program that, when executed by a processor, implements the steps of the method described in any one of the first aspects.

[0105] Figure 7 This is a block diagram illustrating an electronic device 700 according to an exemplary embodiment. Figure 7 As shown, the electronic device 700 may include a processor 701 and a memory 702. The electronic device 700 may also include one or more of a multimedia component 703, an input / output (I / O) interface 704, and a communication component 705.

[0106] The processor 701 controls the overall operation of the electronic device 700 to complete all or part of the steps in the aforementioned electric heat tracing system control method. The memory 702 stores various types of data to support the operation of the electronic device 700. This data may include, for example, instructions for any application or method operating on the electronic device 700, and application-related data such as contact data, sent and received messages, pictures, audio, video, etc. The memory 702 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The multimedia component 703 may include a screen and audio components. The screen may be, for example, a touchscreen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may be further stored in memory 702 or transmitted via communication component 705. The audio component also includes at least one speaker for outputting audio signals. I / O interface 704 provides an interface between processor 701 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual or physical buttons. Communication component 705 is used for wired or wireless communication between the electronic device 700 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IoT, eMTC, or other 5G technologies, or combinations thereof, is not limited here. Therefore, the corresponding communication component 705 may include: a Wi-Fi module, a Bluetooth module, an NFC module, etc.

[0107] In an exemplary embodiment, the electronic device 700 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described electric heat tracing system control method.

[0108] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, which, when executed by a processor, implement the steps of the electric heat tracing system control method described above. For example, the computer-readable storage medium may be the memory 702 including program instructions described above, which may be executed by the processor 701 of the electronic device 700 to complete the electric heat tracing system control method described above.

[0109] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0110] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0111] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A control method for an electric heat tracing system, characterized in that, include: In response to the operation start operation of the electric heat tracing system on the operation interface, the equipment type of the target equipment to be heat-traced in the coal liquefaction system is determined. Based on the equipment type of the target equipment being heated, a corresponding heating temperature control strategy is determined, wherein the temperature at which the heating temperature is increased is increased sequentially in the heating temperature control strategy. According to the heat tracing temperature control strategy, the distributed controller of the electric heat tracing system performs electric heat tracing control on the target device being traced.

2. The method according to claim 1, characterized in that, The step of determining the corresponding heat tracing temperature control strategy based on the equipment type of the target device includes: Obtain the initial temperature data of the heat tracing device corresponding to the target heat-traced equipment; The required temperature of the target device to be heated is determined based on the device type of the target device. Based on the required temperature of the target heat-traced device and the initial temperature data of the corresponding heat-tracing device, a corresponding heat-tracing temperature control strategy is determined.

3. The method according to claim 2, characterized in that, The step of determining a corresponding heat tracing temperature control strategy based on the required temperature of the target heat-traced device and the corresponding initial temperature data of the heat tracing device includes: Based on the required temperature of the target device being heated and the corresponding initial temperature data of the heating device, determine the temperature value at which the heating device increases the heating temperature each time it performs the heating temperature increase and the duration of the heating hold after each increase in the heating temperature. Based on the temperature value of the temperature increase each time the heat tracing device performs the temperature increase and the heat tracing duration after each temperature increase, a corresponding heat tracing temperature control strategy is determined.

4. The method according to claim 1, characterized in that, The method further includes: Acquire real-time temperature data corresponding to the target device being heated, wherein the real-time temperature data includes the temperature data of the target device being heated and / or the temperature data of the heating device corresponding to the target device being heated; Based on the real-time temperature data described above, determine whether a heat tracing warning is required; In the event of a heat tracing warning, identify the interlocking heat tracing device corresponding to the target heat-traced equipment; The interlock start / stop information of the interlocked heat tracing device is generated, and the interlock start / stop information is sent to the interlocked heat tracing device to perform the interlock start / stop operation.

5. The method according to claim 1, characterized in that, The method further includes: Acquire target data for each of the heat-traced target devices, wherein the target data includes at least one of the following: real-time temperature data, fault alarm data, and historical temperature data; Based on the target data of the heat-traced target device, target display information is generated, which is used to draw a monitoring view on the operation interface.

6. The method according to claim 5, characterized in that, The method further includes: In response to a heat tracing control operation on the operating interface, control information for the heat tracing device in the electric heat tracing system is determined, wherein the heat tracing control operation is a control operation for the heat tracing device corresponding to the target heat-traced device. Based on the control information, target control information is generated, which is then sent to the corresponding heat tracing device to perform heat tracing and heating control.

7. A control device for an electric heat tracing system, characterized in that, include: The first determining module is configured to determine the equipment type of the target equipment being heated in the coal liquefaction system in response to an operation start-up operation of the electric heat tracing system on the operation interface. The second determining module is configured to determine a corresponding heat tracing temperature control strategy based on the equipment type of the target heat-traced device, wherein the temperature at which the heat tracing temperature is increased is increased sequentially in the heat tracing temperature control strategy. The control module is configured to perform electric heat tracing control on the target device being traced through the distributed controller of the electric heat tracing system, according to the heat tracing temperature control strategy.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the steps of the method described in any one of claims 1-6.

9. An electronic device, characterized in that, include: A memory on which computer programs are stored; A processor for executing the computer program in the memory to implement the steps of the method according to any one of claims 1-6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1-6.

Images