DCS temperature control system and application thereof in multifunctional reaction kettle

Abstract

The invention discloses a DCS (distributed control system) temperature control system and application thereof in a multifunctional reaction kettle, and particularly relates to the technical field of DCS universal temperature control programs, and the DCS temperature control system comprises a temperature acquisition module, a control module, an execution module, a reaction kettle body, a DCS temperature control system, a material conveying system and a stirring system. According to the DCS temperature control system and the application thereof in the multifunctional reaction kettle, an appropriate temperature control program can be rapidly and accurately called through the DCS temperature control system according to the actual temperature condition in the reaction kettle, efficient temperature control is achieved through a user-defined multi-section rising and falling temperature control mode, the temperature control efficiency is greatly improved, energy consumption is reduced, and the application range of the DCS temperature control system in the multifunctional reaction kettle is widened. And a self-adaptive adjustment unit in the control module can adjust temperature control program parameters in real time according to various factors, so that the precision and the stability of temperature control are further improved, different production process requirements are met, and the universality and the flexibility of the system are enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of DCS universal temperature control programs, and particularly to a DCS temperature control system and its application in a multi-functional reaction kettle. Background Art

[0002] In industries such as chemical engineering and pharmaceuticals, the temperature control of reaction kettles plays a crucial role in product quality and production efficiency. Traditional temperature control systems have many defects: on the one hand, the temperature control programs are fixed, mostly designed for specific temperature ranges or processes, lacking generality. For example, in some fine chemical syntheses, different stages of products require different heating and cooling rates and constant temperature conditions. Traditional systems are difficult to switch flexibly, often requiring frequent manual intervention to adjust equipment, increasing operation complexity and the risk of errors, and it is difficult to accurately maintain the temperature required for complex processes, affecting product purity and yield. On the other hand, existing systems respond sluggishly to the dynamic changes in the reaction process. Chemical reactions are often accompanied by sudden changes in heat release or absorption. For example, the heat release of polymerization reactions changes non-linearly with the process. Traditional temperature control means are difficult to adapt in a timely manner, easily causing large temperature fluctuations, leading to out-of-control reactions, increased side reactions, and even damage to equipment, increasing maintenance costs and potential safety hazards.

[0003] The DCS temperature control system of the present invention and its application in a multi-functional reaction kettle effectively solve these problems. By presetting a variety of flexible temperature control programs and an adaptive adjustment unit, it can automatically and quickly switch temperature control strategies and precisely adjust according to factors such as the temperature in the reaction kettle, material characteristics, and reaction process. While improving temperature control accuracy and stability, it reduces manual intervention, reduces the probability of operation errors, improves production safety and product quality consistency, and the efficient temperature control reduces energy waste, reduces production costs, and enhances the intelligent and automated level of the industrial production process. Summary of the Invention

[0004] The main object of the present invention is to provide a DCS temperature control system and its application in a multi-functional reaction kettle, which can effectively solve the problem that existing systems respond sluggishly to the dynamic changes in the reaction process. Chemical reactions are often accompanied by sudden changes in heat release or absorption. For example, the heat release of polymerization reactions changes non-linearly with the process. Traditional temperature control means are difficult to adapt in a timely manner, easily causing large temperature fluctuations, leading to out-of-control reactions, increased side reactions, and even damage to equipment, increasing maintenance costs and potential safety hazards.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A DCS temperature control system, comprising:

[0007] A temperature acquisition module for real-time acquisition of temperature data inside the reaction kettle;

[0008] A control module, connected to the temperature acquisition module. A variety of preset temperature control programs are stored in the control module. The control module compares the data collected by the temperature acquisition module with a preset temperature value and calls the corresponding preset temperature control program according to the comparison result;

[0009] An execution module, connected to the control module. The execution module heats or cools the reaction kettle according to the preset temperature control program called by the control module. Among them, the execution module includes multiple independently controllable program logic modules, and can achieve multi-segment setting of the target temperature, realizing rapid heating and cooling to the target range, and precisely controlling the temperature through PID.

[0010] Preferably, the preset temperature control programs in the control module include a heating program, a normal temperature replacement program, and a cooling program. Among them, the heating program and the cooling program can achieve rapid heating or cooling (the on-off valve and the regulating valve are fully open, the maximum flow rate of the medium, and the maximum heat exchange rate) and precise temperature control (the on-off valve is fully open, and the regulating valve automatically adjusts the opening of the medium inlet regulating valve from 0% to 100% according to the temperature difference and the preset PID parameters to achieve precise temperature control). When the rapid heating program starts, the hot medium control valve and the regulating valve are in the fully open state, so that the heat exchange rate runs maximally. When the precise temperature control program runs, the valve opening is controlled by the PID module according to the temperature deviation, and the flow rates of the hot medium and the cold medium are dynamically adjusted. When the rapid cooling program starts, the valve opening is controlled by the PID module, and the flow rates of the hot medium and the cold medium are dynamically adjusted. The cold medium control valve and the regulating valve are in the fully open state, so that the heat exchange rate runs maximally. The cold medium control valve and the regulating valve are in the fully open state, so that the heat exchange rate runs maximally.

[0011] Preferably, the control module further includes an adaptive adjustment unit, which adjusts the parameters of the preset temperature control program in real time according to the material characteristics, reaction process, and external environmental factors in the reaction kettle.

[0012] Preferably, the temperature acquisition module includes multiple temperature sensors. The multiple temperature sensors are used to detect the temperature in the reaction kettle (the actual temperature of the material in the reaction kettle, which is also the measurement of the target temperature) and the temperature of the reaction kettle jacket (the jacket temperature is the temperature of the heating or cooling medium). The multiple temperature sensors are distributed at different positions of the reaction kettle, and the control module comprehensively analyzes the data collected by the multiple temperature sensors to determine the actual temperature state in the reaction kettle.

[0013] A multifunctional reaction kettle, comprising:

[0014] The reaction kettle body;

[0015] A DCS temperature control system, connected to the reaction kettle body. The DCS temperature control system is the DCS temperature control system described in any one of claims 1-4;

[0016] A material conveying system, connected to the reaction kettle body, for conveying materials into the reaction kettle;

[0017] A stirring system, arranged inside the reaction kettle body, for stirring materials.

[0018] Preferably, the reaction kettle body further includes a heat preservation layer, which is made of a new type of high-efficiency heat preservation material with a thermal conductivity lower than that of existing heat preservation materials, and can effectively reduce heat dissipation.

[0019] Preferably, the DCS temperature control system is further connected with an alarm module. When the temperature exceeds the preset safe temperature range or the system fails, the alarm module emits an alarm signal.

[0020] Preferably, the DCS temperature control system is also provided with a historical curve module, which can realize the query of temperature historical trends and the analysis of heating and cooling trends. It can not only trace the data, but also analyze the heating and cooling rates and heating duration, so as to optimize the control parameters.

[0021] Preferably, the DCS temperature control system is also provided with an audit tracking module. For the modification of temperature control parameters and the operation actions of each module, it can trace the operation account, operation station, operation time and operation results, making the management more strict and effective.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The DCS temperature control system of the present invention can quickly and accurately call a suitable temperature control program according to the actual temperature in the reaction kettle, and through the heating and cooling units with adjustable efficiency, it realizes efficient temperature control, greatly improves the temperature control efficiency, and reduces energy consumption.

[0024] 2. The adaptive adjustment unit in the control module of the present invention can adjust the temperature control program parameters in real time according to various factors, further improving the accuracy and stability of temperature control, adapting to different production process requirements, and enhancing the versatility and flexibility of the system.

[0025] 3. The new heat preservation layer in the multi-functional reaction kettle of the present invention effectively reduces heat dissipation. Combined with the DCS temperature control system, it further saves energy and improves the overall performance of the reaction kettle.

[0026] 4. The present invention improves the safety of the system through the setting of the alarm module, which can timely remind the operator to handle abnormal situations and avoid the occurrence of production accidents. Specific embodiments

[0027] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0028] Example 1, a DCS temperature control system, characterized in that it includes:

[0029] A temperature acquisition module for real-time acquisition of temperature data inside the reaction kettle;

[0030] A control module, connected to the temperature acquisition module. Multiple preset temperature control programs are stored in the control module. The control module compares the data collected by the temperature acquisition module with the preset temperature value, and calls the corresponding preset temperature control program according to the comparison result;

[0031] An execution module, connected to the control module. The execution module heats or cools the reaction kettle according to the preset temperature control program called by the control module. Among them, the execution module includes multiple independently controllable program logic modules, and can achieve multi-segment setting of the target temperature, realizing rapid heating and cooling to the target range, and performing precise temperature control through PID.

[0032] Furthermore, the preset temperature control programs in the control module include a heating program, a normal temperature replacement program, and a cooling program. Among them, the heating program and the cooling program can achieve rapid heating or cooling (the on-off valve and the regulating valve are fully open, the maximum flow rate of the medium, and the maximum heat exchange rate) and precise temperature control (the on-off valve is fully open, and the regulating valve automatically adjusts the opening of the medium inlet regulating valve from 0% to 100% according to the temperature difference and the preset PID parameters to achieve precise temperature control). When the rapid heating program starts, the hot medium control valve and the regulating valve are in the fully open state, so that the heat exchange rate operates maximally. When the precise temperature control program runs, the valve opening is controlled through the PID module according to the temperature deviation, and the flow rates of the hot medium and the cold medium are dynamically adjusted. When the rapid cooling program starts, the valve opening is controlled through the PID module, and the flow rates of the hot medium and the cold medium are dynamically adjusted. The cold medium control valve and the regulating valve are in the fully open state, so that the heat exchange rate operates maximally. The cold medium control valve and the regulating valve are in the fully open state, so that the heat exchange rate operates maximally.

[0033] Furthermore, the control module further includes an adaptive adjustment unit, and the adaptive adjustment unit adjusts the parameters of the preset temperature control program in real time according to the material characteristics, reaction process, and external environmental factors inside the reaction kettle.

[0034] Furthermore, the temperature acquisition module includes multiple temperature sensors. The multiple temperature sensors are used to detect the temperature inside the reaction kettle (the actual temperature of the material inside the reaction kettle, which is also the measurement of the target temperature) and the temperature of the reaction kettle jacket (the temperature of the jacket is the temperature of the heating or cooling medium). The multiple temperature sensors are distributed at different positions of the reaction kettle, and the control module comprehensively analyzes the data collected by the multiple temperature sensors to determine the actual temperature state inside the reaction kettle.

[0035] Specifically, the assembly and debugging of the DCS temperature control system:

[0036] 1. Installation and Calibration of Temperature Acquisition Module:

[0037] Carefully select high-precision and high-stability temperature sensors with a measurement accuracy of ±0.1°C. Install them at key positions such as the bottom, middle, top of the reactor, and near the material inlet and outlet to ensure comprehensive and accurate acquisition of temperature data inside the reactor. For example, installing a sensor at the bottom can monitor the initial temperature change of the material, the middle sensor is used to reflect the temperature in the core reaction area, and the top sensor can promptly capture the temperature fluctuations in the gas phase part;

[0038] Use professional calibration equipment and standard temperature sources to strictly calibrate each temperature sensor. During the calibration process, simulate different temperature environments, gradually test the output data of the sensor from low temperature to high temperature, and compare it with the standard temperature value. Adjust the parameters of the sensor to control the measurement error within a very small range to ensure the accuracy of temperature acquisition.

[0039] 2. Settings and Optimization of Control Module:

[0040] Write and input fast heating program, precise temperature control program, fast cooling program, etc. into the control module according to specific algorithms and logics. In the fast heating program, set that when the start signal is issued, the control module can calculate the required heating efficiency according to the volume of the reactor and the characteristics of the material, and at the same time keep the cut-off valve and regulating valve fully open, with the maximum flow rate of the heat medium, so that the heat transfer rate operates maximally to ensure that the heating rate can reach more than 5°C per minute;

[0041] The precise temperature control program is based on an advanced PID control algorithm, and different proportional, integral, and derivative parameters are set according to different temperature deviation ranges. For example, when the temperature deviation is within ±1°C, a smaller proportional coefficient and integral time are used to achieve stable fine-tuning; when the deviation exceeds ±2°C, the proportional coefficient and integral time are increased to accelerate the adjustment speed,

[0042] For the adaptive adjustment unit, first set the initial adjustment rules and parameter ranges according to factors such as the heat release characteristics of common materials, reaction kinetics data, and the ambient temperature change range. For example, for an exothermic reaction, when the reaction rate accelerates and the temperature rise rate exceeds a certain threshold, the adaptive adjustment unit automatically increases the efficiency of the cooling unit and appropriately adjusts the parameters of the precise temperature control program.

[0043] 3. Connection and Testing of Execution Module:

[0044] Reliably connect the heating unit and cooling unit of the execution module to the control module to ensure the stability and anti-interference of the communication line. Use high-quality cables and communication interfaces, such as shielded twisted pairs and industrial Ethernet interfaces, to reduce interference and delay during signal transmission. Moreover, the execution module, communication module, and network facilities all adopt redundant design and are equipped with a UPS emergency power supply that can supply power for 60 minutes to ensure stable and reliable system operation;

[0045] Conduct a comprehensive test on the efficiency adjustment function of each heating unit and cooling unit. During the test, gradually adjust from the minimum efficiency to the maximum efficiency, and check whether the response speed and actual efficiency output of the unit match the control instructions. For example, set the heating unit to gradually increase from 10% efficiency to 100% efficiency, observe its heating effect and efficiency change curve, and ensure that each unit can operate stably at different efficiencies.

[0046] Embodiment 2, a multifunctional reaction kettle, comprising:

[0047] The reaction kettle body;

[0048] A DCS temperature control system, connected to the reaction kettle body, and the DCS temperature control system is the DCS temperature control system according to any one of claims 1-4;

[0049] A material conveying system, connected to the reaction kettle body, for conveying materials into the reaction kettle;

[0050] A stirring system, arranged inside the reaction kettle body, for stirring materials.

[0051] Furthermore, the reaction kettle body further includes a heat preservation layer, which is made of a new type of high-efficiency heat preservation material, and its thermal conductivity is lower than that of existing heat preservation materials, which can effectively reduce heat loss.

[0052] Furthermore, the DCS temperature control system is also connected with an alarm module. When the temperature exceeds the preset safe temperature range or the system fails, the alarm module emits an alarm signal.

[0053] Furthermore, the DCS temperature control system is also provided with a historical curve module, which can realize the query of temperature historical trends and the analysis of heating and cooling trends. It can not only realize data traceability but also be used to analyze the heating and cooling rates and heating duration, so as to optimize the control parameters.

[0054] Furthermore, the DCS temperature control system is also provided with an audit trail module. For the modification of temperature control parameters and the operation actions of each module, it can realize the traceability of the operation account, operation station, operation time, and operation result, and the management is more strict and effective.

[0055] Specifically, the integration and testing of the multifunctional reaction kettle

[0056] 1. System connection and collaborative work test:

[0057] Closely connect the assembled DCS temperature control system with the reactor body, material conveying system, and stirring system to ensure normal communication between the flow control device of the material conveying system, the speed controller of the stirring system, etc. and the DCS temperature control system, enabling data interaction and collaborative control. For example, when the DCS temperature control system detects that the temperature is approaching the set reaction temperature, it can send signals to the material conveying system to adjust the feeding rate of the material, and at the same time send instructions to the stirring system to adjust the stirring speed to ensure the uniformity and stability of the reaction.

[0058] 2. Installation and detection of the thermal insulation layer of the reactor body:

[0059] Select a new type of high-efficiency thermal insulation material, such as nano-aerogel composite material, whose thermal conductivity can be as low as below 0.02 W / (m·K). Carefully install it on the outer wall of the reactor body to ensure that the thickness of the thermal insulation layer is uniform, without cracks and voids. Adopt a multi-layer lamination process and seal the treatment between each layer of thermal insulation material to reduce the heat conduction path.

[0060] Use equipment such as a thermal imager to detect the effect of the thermal insulation layer. Before the reactor runs, conduct a thermal imaging scan of the outer wall of the reactor to check whether there are areas with abnormally high local temperatures, ensuring that the thermal insulation layer can effectively reduce heat loss. For example, at the same ambient temperature, compared with the reactor without installing this thermal insulation layer, the outer wall temperature of the installed reactor drops by more than 20 °C.

[0061] Simulation operation test and parameter optimization:

[0062] Before the reactor is put into use, conduct multiple simulation operation tests. Add simulated materials into the reactor, start the DCS temperature control system, and conduct simulated reactions according to different process conditions and temperature curves. For example, simulate the batch reaction in chemical synthesis, set different heating, constant temperature, and cooling stages, and observe the temperature control effect of the DCS temperature control system in each stage.

[0063] Detailedly record information such as temperature change data, working status of heating and cooling units, and material reaction conditions during the simulation operation process. Based on these data, further optimize the parameters of the DCS temperature control system. For example, if it is found that the heating rate is too slow in a certain heating stage, the startup sequence and efficiency distribution of the heating unit can be appropriately adjusted; if the temperature fluctuates greatly during the constant temperature stage, the parameters of the precise temperature control program can be further fine-tuned.

[0064] Operation and monitoring in actual production

[0065] 1. Material conveying and reaction startup:

[0066] According to the production process requirements, the material conveying system accurately conveys materials into the reactor, with the flow control accuracy reaching ±0.5 L / min. At the same time, the stirring system is started, and the stirring speed is set within a suitable range according to the material characteristics and reaction requirements. For example, for high-viscosity materials, the stirring speed can be set at 50 - 100 rpm to ensure thorough mixing of the materials.

[0067] 2. Temperature acquisition and program call:

[0068] The temperature acquisition module continuously and real-time acquires the temperature data inside the reactor and transmits it to the control module at a frequency of once per second. The control module quickly compares and analyzes the acquired data with the preset temperature value. For example, in a certain pharmaceutical reaction, when it is necessary to quickly heat up from room temperature to 80°C, the control module immediately calls the rapid heating-up program. At the same time, the cut-off valve and the regulating valve are in the fully open state, and the maximum flow rate of the heat medium is used to maximize the heat exchange rate, so that the temperature inside the reactor rises rapidly according to the preset heating curve, and the heating rate is stable at about 4°C per minute.

[0069] 3. Precise temperature control and adaptive adjustment:

[0070] When the temperature approaches the target temperature, the control module automatically switches to the precise temperature control program. For example, in a chemical polymerization reaction, when the temperature approaches the reaction temperature of 120°C, the precise temperature control program dynamically adjusts the efficiency of the heating unit and the cooling unit according to the temperature deviation. If the temperature deviation is within ±0.5°C, the control module finely adjusts the efficiency of the heating unit so that its output efficiency fluctuates between 10% - 30% of the rated efficiency to maintain temperature stability.

[0071] The adaptive adjustment unit continuously monitors changes in the material characteristics inside the reactor, the reaction process, and changes in external environmental factors. For example, during the polymerization reaction process, as the reaction progresses, the material viscosity gradually increases, and the reaction heat release rate may change. After the adaptive adjustment unit detects this change, it automatically adjusts the heat dissipation efficiency of the cooling unit and the parameters of the precise temperature control program. If the heat release rate increases, the efficiency of the cooling unit is increased, and the proportional coefficient and integral time in the PID parameters are appropriately adjusted to ensure that the temperature is controlled within the range of 120°C ± 0.5°C.

[0072] 4. Fault alarm and emergency handling:

[0073] If the temperature exceeds the preset safe temperature range or the system fails during operation, the alarm module immediately issues an alarm signal. The alarm signal is simultaneously prompted to the operator through the audible and visual alarm and the control system interface. For example, when the temperature exceeds 130°C (the preset safe upper limit), the audible and visual alarm emits a strong audible and visual signal, and at the same time, the control system interface displays detailed fault information, such as the position of temperature overrun, possible reasons, etc.

[0074] Operators can take corresponding measures in a timely manner according to the alarm information, such as checking whether there are faults in the heating or cooling unit, whether the material transportation is abnormal, whether the stirring system is working properly, etc. If it is found that the temperature rise is caused by the out-of-control heating unit, the power supply of the heating unit can be immediately cut off, and the standby cooling system can be started for cooling. At the same time, the production process parameters can be adjusted or production can be stopped to ensure production safety and product quality.

[0075] During the whole production process, by continuously monitoring and optimizing the DCS temperature control system and its application in the multi-functional reaction kettle, it is ensured that the system is always in the best operating state, meeting the strict requirements of the chemical, pharmaceutical and other industries for the temperature control of the reaction kettle, improving production efficiency and product quality, while reducing energy consumption and production costs.

[0076] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A DCS temperature control system, characterized in that, Including: A temperature acquisition module for real-time acquisition of the temperature data inside the reactor; A control module connected to the temperature acquisition module. A variety of preset temperature control programs are stored in the control module. The control module compares the data acquired by the temperature acquisition module with the preset temperature value and calls the corresponding preset temperature control program according to the comparison result; An execution module connected to the control module. The execution module heats or cools the reactor according to the preset temperature control program called by the control module. Among them, the execution module includes multiple independently controllable program logic modules and can achieve multi-segment setting of the target temperature, realizing rapid heating and cooling to the target range and precisely controlling the temperature through PID.

2. The DCS temperature control system according to claim 1, characterized in that: The preset temperature control programs in the control module include a heating program, a normal temperature replacement program, and a cooling program. Among them, the heating program and the cooling program can achieve rapid heating or cooling (the on-off valve and the regulating valve are fully open, the maximum flow rate of the medium, and the maximum heat exchange rate) and precise temperature control (the on-off valve is fully open, and the regulating valve automatically adjusts the opening of the medium inlet regulating valve from 0% to 100% according to the temperature difference and the preset PID parameters to achieve precise temperature control). When the rapid heating program starts, the heat medium control valve and the regulating valve are in the fully open state, maximizing the heat exchange rate operation. When the precise temperature control program is running, the valve opening is controlled through the PID module according to the temperature deviation, dynamically adjusting the flow rates of the heat medium and the refrigerant. When the rapid cooling program starts, the valve opening is controlled through the PID module, dynamically adjusting the flow rates of the heat medium and the refrigerant. The cold medium control valve and the regulating valve are in the fully open state, maximizing the heat exchange rate operation. The cold medium control valve and the regulating valve are in the fully open state, maximizing the heat exchange rate operation.

3. A DCS temperature control system according to claim 1, characterized in that: The control module further includes an adaptive adjustment unit, which adjusts the parameters of the preset temperature control program in real time according to the material characteristics, reaction process, and external environmental factors inside the reactor.

4. A DCS temperature control system according to claim 1, characterized in that: The temperature acquisition module includes multiple temperature sensors. The multiple temperature sensors are used to detect the temperature inside the reactor (the actual temperature of the material inside the reactor, which is also the measurement of the target temperature) and the temperature of the reactor jacket (the temperature of the medium for heating or cooling). The multiple temperature sensors are distributed at different positions of the reactor, and the control module comprehensively analyzes the data acquired by the multiple temperature sensors to determine the actual temperature state inside the reactor.

5. A multifunctional reactor, characterized in that, Including: The reactor body; A DCS temperature control system connected to the reactor body. The DCS temperature control system is the DCS temperature control system described in any one of claims 1-4; A material conveying system connected to the reactor body for conveying materials into the reactor; A stirring system arranged inside the reactor body for stirring the materials.

6. A multifunctional reactor according to claim 5, characterized in that, The reactor body further includes a heat insulation layer made of a new type of high-efficiency heat insulation material, whose thermal conductivity is lower than that of the existing heat insulation materials, and can effectively reduce heat loss.

7. A multifunctional reactor according to claim 6, characterized in that, The DCS temperature control system is further connected to an alarm module. When the temperature exceeds the preset safe temperature range or the system fails, the alarm module emits an alarm signal.

8. A multifunctional reactor according to claim 7, characterized in that, The DCS temperature control system is also equipped with a historical curve module, which can realize the query of temperature historical trends and the analysis of heating and cooling trends. It can not only achieve data traceability, but also be used to analyze the heating and cooling rates and heating duration, so as to optimize the control parameters.

9. A multifunctional reactor according to claim 8, characterized in that, The DCS temperature control system is also equipped with an audit trail module. For the modification of temperature control parameters and the operation actions of each module, it can trace the operation account, operation station, operation time, and operation results, making the management more rigorous and effective.