Method, device and equipment for controlling bed temperature of adsorption tower and storage medium

Abstract

The invention relates to the technical field of adsorption tower operation control, in particular to an adsorption tower bed temperature control method, device and equipment and a computer storage medium. According to the adsorption tower bed temperature control method, the bed temperature is monitored in real time, the circulation amount is dynamically adjusted according to the preset function curve, and the bed temperature can be effectively prevented from being too high, so that the process safety risk is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of adsorption tower operation control, and in particular to an adsorption tower bed temperature control method, device, equipment and computer storage medium. Background Art

[0002] In the existing adsorption tower operation, the control of bed temperature is a key issue. Too high bed temperature may affect process safety, leading to reduced production efficiency and product quality problems. Therefore, it is necessary to develop an effective automatic control method for bed temperature. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the problem of lack of automatic bed temperature control method in the prior art.

[0004] In order to solve the above technical problems, the present invention provides a method for controlling the temperature of an adsorption tower bed, comprising:

[0005] Real-time monitoring of bed temperature;

[0006] Construct a relationship model between bed temperature and circulation compensation coefficient;

[0007] When the bed temperature is monitored to be higher than a preset threshold, a target circulation amount compensation coefficient corresponding to the current bed temperature is calculated according to the relationship model;

[0008] The target circulation volume compensation coefficient is applied to the circulation volume setting value to automatically adjust the circulation volume.

[0009] Preferably, the real-time monitoring of bed temperature comprises:

[0010] The bed temperature data is collected in real time and the fast Fourier transform algorithm is used to filter out the noise.

[0011] Preferably, the construction of the relationship model between bed temperature and circulation volume includes:

[0012] Based on historical data, a polynomial regression model is used, and the temperature change rate is introduced as an additional variable to establish a relationship model between bed temperature and circulation compensation coefficient:

[0013] Y=aX 2 +bX+c+dΔX

[0014] Among them, Y is the circulation compensation coefficient, X is the bed temperature, ΔX is the rate of change of bed temperature, and a, b, c, and d are model parameters obtained by data fitting.

[0015] Preferably, when it is monitored that the bed temperature is higher than the protection exit condition temperature threshold:

[0016] Start countdown and warning for preset duration;

[0017] If, after the countdown ends, the bed temperature is still higher than the protection exit condition temperature threshold, the circulation volume is automatically reduced and the auxiliary cooling system is started.

[0018] Preferably, during the countdown:

[0019] Real-time monitoring of bed temperature change trend;

[0020] If the bed temperature change trend is decreasing and the decreasing rate reaches a first preset rate, the early warning and subsequent operations are stopped.

[0021] Preferably, when it is monitored that the bed temperature is higher than the temperature threshold of the accident nitrogen filling valve protection opening condition:

[0022] Start the emergency nitrogen filling valve.

[0023] Preferably, after starting the emergency nitrogen filling valve, the method further includes:

[0024] Real-time monitoring of the temperature drop rate after the emergency nitrogen filling valve is activated;

[0025] If the temperature drop rate of the emergency nitrogen filling valve after activation is lower than the second preset rate, the nitrogen filling amount is increased.

[0026] The present invention also provides an adsorption tower bed temperature control device, comprising:

[0027] Temperature monitoring module, used to monitor bed temperature in real time;

[0028] A relationship model building module is used to build a relationship model between bed temperature and circulation volume compensation coefficient;

[0029] A circulation compensation determination module, for calculating a target circulation amount compensation coefficient corresponding to the current bed temperature according to the relationship model when the bed temperature is monitored to be higher than a preset threshold;

[0030] The circulation volume automatic adjustment module is used to apply the target circulation volume compensation coefficient to the circulation volume setting value to automatically adjust the circulation volume.

[0031] The present invention also provides an adsorption tower bed temperature control device, comprising:

[0032] Memory for storing computer programs;

[0033] A processor is used to implement the above-mentioned steps of the adsorption tower bed temperature control method when executing the computer program.

[0034] The present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned adsorption tower bed temperature control method are implemented.

[0035] The above technical solution of the present invention has the following advantages compared with the prior art:

[0036] The adsorption tower bed temperature control method described in the present invention can effectively prevent the bed temperature from being too high, thereby reducing process safety risks, by monitoring the bed temperature in real time and dynamically adjusting the circulation volume according to a preset function curve. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein:

[0038] Figure 1 The present invention provides a flow chart for realizing a method for controlling the bed temperature of an adsorption tower. DETAILED DESCRIPTION

[0039] The core of the present invention is to provide a method, device, equipment and computer storage medium for controlling the bed temperature of an adsorption tower, which effectively achieves the purpose of automatic temperature control.

[0040] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] Please refer to Figure 1 , Figure 1 The present invention provides a flow chart of the method for controlling the bed temperature of an adsorption tower; the specific operation steps are as follows:

[0042] S101: real-time monitoring of bed temperature;

[0043] S102: constructing a relationship model between bed temperature and circulation volume compensation coefficient;

[0044] S103: when the bed temperature is monitored to be higher than a preset threshold, a target circulation amount compensation coefficient corresponding to the current bed temperature is calculated according to the relationship model;

[0045] S104: Apply the target circulation volume compensation coefficient to the circulation volume setting value to automatically adjust the circulation volume.

[0046] Based on the above embodiments, this embodiment describes step S101 in detail:

[0047] The bed temperature data is collected in real time and the fast Fourier transform algorithm is used to filter out the noise.

[0048] Specifically:

[0049] The present invention selects a high-precision, high-stability temperature sensor, such as a thermocouple or a platinum resistance temperature sensor, to ensure the accuracy of the measurement.

[0050] The present invention deploys sensors in key areas of the adsorption tower, including the bottom, middle and top of the tower, as well as beds at different depths, to obtain comprehensive thermal distribution data.

[0051] The present invention uses a data acquisition module (such as a PLC or a data acquisition card) to collect sensor signals and convert them into digital signals for further processing. The present invention designs a high sampling rate data acquisition system to capture rapid temperature changes, especially under process conditions where the bed temperature may change rapidly.

[0052] The present invention performs filtering and amplification processing on the collected analog signal to reduce noise and interference.

[0053] The present invention regularly calibrates the sensor to ensure the accuracy and reliability of long-term measurement.

[0054] Based on the above embodiments, this embodiment describes step S102 in detail:

[0055] Based on historical data, a polynomial regression model is used, and the temperature change rate is introduced as an additional variable to establish a relationship model between bed temperature and circulation compensation coefficient:

[0056] Y=aX 2 +bX+c+dΔX

[0057] Among them, Y is the circulation compensation coefficient, X is the bed temperature, ΔX is the rate of change of bed temperature, and a, b, c, and d are model parameters obtained by data fitting.

[0058] Specifically:

[0059] The present invention collects historical operation data, including bed temperature, circulation volume and related operation conditions such as pressure, flow rate, etc. In addition, the integrity and accuracy of the data are ensured, and missing or abnormal data are processed.

[0060] The present invention extracts useful features from the original data, including bed temperature, temperature change rate (i.e., time derivative of temperature), etc. The temperature change rate can be obtained by differentiating the temperature data, which can be forward difference, backward difference or central difference.

[0061] The present invention selects a polynomial regression model to fit the relationship between the bed temperature and the circulation volume compensation coefficient.

[0062] The polynomial regression model can be expressed as: Y = aX 2 +bX+c+dΔX+eXΔX+f(ΔX) 2 Where Y is the circulation compensation coefficient, X is the bed temperature, ΔX is the temperature change rate, and a, b, c, d, e, and f are model parameters.

[0063] The present invention uses historical data to train the polynomial regression model and estimates the model parameters by minimizing the error between the predicted value and the actual value. The model parameters can be solved using optimization algorithms such as gradient descent and least squares method.

[0064] Based on the above embodiments, this embodiment describes step S103 in detail:

[0065] According to process requirements and safety standards, a preset threshold for bed temperature is set. This threshold is determined by the operator based on experience and historical data analysis. Exceeding this value may affect adsorption efficiency or pose a safety risk.

[0066] Use high-precision temperature sensors to monitor bed temperature in real time and transmit data to the central control system.

[0067] The real-time monitored bed temperature is compared with the preset threshold. If the bed temperature is higher than the threshold, the next calculation process is triggered.

[0068] Using the previously established polynomial regression model, the current bed temperature and temperature change rate are input to calculate the corresponding circulation volume compensation coefficient.

[0069] Adjust the circulation volume setting value according to the compensation coefficient calculated by the model. This coefficient reflects the proportion of circulation volume that needs to be increased or decreased in order to control the bed temperature within a safe range.

[0070] The calculation results are converted into control instructions and output to the circulation volume control system to achieve dynamic adjustment of the circulation volume.

[0071] Based on the above embodiments, this embodiment describes step S104 in detail:

[0072] The target circulation compensation factor is calculated based on the real-time monitored bed temperature and the preset relationship model. This factor is based on historical data and statistical models and is used to adjust the circulation volume in response to temperature changes.

[0073] The calculated target circulation compensation coefficient is applied to the current circulation setting value. If the compensation coefficient is greater than 1, it means that the circulation volume needs to be increased to reduce the bed temperature; if the compensation coefficient is less than 1, it means that the circulation volume needs to be reduced.

[0074] Automatically adjust the setpoint of the circulation volume through the interface with the control system. This usually involves modifying the set point in the control algorithm or directly adjusting the opening of the actuator (such as a valve).

[0075] The actuator (such as a regulating valve) in the control system is adjusted according to the new circulation volume setting value to change the flow rate of the fluid, thereby achieving control of the bed temperature.

[0076] After adjusting the circulation volume, the system will continuously monitor the change of bed temperature to verify the adjustment effect. If the temperature change does not meet the expectation, the system will further fine-tune the circulation volume setting value based on the feedback.

[0077] During the automatic adjustment of the circulation volume, the system checks whether the new set point is within the safe operating range to avoid exceeding the limitations of the equipment.

[0078] In a specific application, a preset function curve is used to dynamically adjust the circulation volume in response to changes in bed temperature. The function curve is derived based on experimental data and theoretical analysis and can accurately describe the relationship between bed temperature and circulation volume. The specific parameter points are as follows:

[0079] The X-axis represents the bed temperature (unit: °C), and the Y-axis represents the circulation volume compensation coefficient.

[0080] Parameter points: (0,0), (10,1), (12,1), (14,1.5), (16,2.5).

[0081] When the bed temperature exceeds the preset threshold, the system will automatically adjust the circulation volume set value to reduce the bed temperature. For example, when the bed temperature rises from 10°C to 14°C, the circulation volume compensation coefficient increases from 1 to 1.5, and the system will increase the circulation volume according to this compensation coefficient to take away more heat, thereby reducing the bed temperature.

[0082] The present invention is based on the circulation volume statistics and automatic setting functions, presets a circulation volume setting compensation (high bed temperature) function curve, realizes the linkage between the circulation volume setting value and the bed temperature, takes the bed temperature control into consideration during the circulation volume automatic control process, and prevents the high bed temperature from affecting the process safety.

[0083] Based on the above embodiment, when it is monitored that the bed temperature is higher than the protection exit condition temperature threshold:

[0084] Start countdown and warning for preset duration;

[0085] If, after the countdown ends, the bed temperature is still higher than the protection exit condition temperature threshold, the circulation volume is automatically reduced and the auxiliary cooling system is started.

[0086] Specifically:

[0087] When the bed temperature is detected to exceed the protection exit condition temperature threshold (e.g. 55°C), the system will immediately start a preset countdown (e.g. 30 seconds) and issue an early warning. The early warning can be carried out in a variety of ways, such as sound and light alarms, system log records, and notifications sent to the control room or the mobile devices of relevant personnel.

[0088] During the countdown, the system continues to monitor the bed temperature in real time to determine if the temperature drops below the safety threshold. If the bed temperature drops below the threshold during the countdown, the system will cancel the activated warning and subsequent protection measures and resume normal operation.

[0089] If the bed temperature is still higher than the protection exit condition temperature threshold after the countdown ends, the system will automatically execute the preset protection measures. The protection measures include automatically reducing the circulation volume, which can be achieved by adjusting the opening of the relevant valves or adjusting the running speed of the pump.

[0090] In addition to reducing the circulation volume, the system will also start the auxiliary cooling system to quickly reduce the bed temperature. The auxiliary cooling system may include a water cooling system, an air cooling system or other cooling media, depending on the design and process requirements of the adsorption tower.

[0091] During the whole process, all operations and changes in bed temperature are recorded by the system for later analysis and audit. The safety monitoring system ensures that all protection measures are executed at the correct time and sequence.

[0092] In a specific application, when the bed temperature of any module in the adsorption tower reaches or exceeds 55°C, the protection exit condition is triggered. The system will not respond immediately to the temperature increase, but will set a 30-second delay. This delay allows short-term temperature fluctuations to not cause unnecessary triggering of protection measures. During these 30 seconds, if the temperature drops below 55°C, the protection measures will not be executed and the system will continue to operate normally. If the temperature is still above 55°C after 30 seconds, the system will execute the preset protection measures, such as reducing the circulation volume or adjusting the process parameters.

[0093] Based on the above embodiment, during the countdown:

[0094] Real-time monitoring of bed temperature change trend;

[0095] If the bed temperature change trend is decreasing and the decreasing rate reaches a first preset rate, the early warning and subsequent operations are stopped.

[0096] Specifically:

[0097] A high-precision temperature sensor is used to monitor the temperature of the adsorption tower bed in real time and transmit the data to the central control system.

[0098] By analyzing the successive temperature readings, the trend of the bed temperature can be determined. This can be done by calculating the time series derivative of the temperature data, i.e. the rate of change of temperature.

[0099] According to the process requirements and safety standards, a first preset rate is set, which is a threshold of temperature drop to determine whether it is necessary to stop the early warning and subsequent operations.

[0100] The system monitors the falling rate of the bed temperature in real time. If the monitored temperature falling rate reaches or exceeds the first preset rate, the system will evaluate whether further action is needed.

[0101] When the bed temperature changes in a downward trend and the rate of decline reaches or exceeds the first preset rate, the system will automatically stop the warning signal and evaluate whether it is necessary to stop the subsequent protection operations that have been started, such as the operation of the auxiliary cooling system.

[0102] Based on the above embodiment, when it is monitored that the bed temperature is higher than the temperature threshold of the accident nitrogen filling valve protection opening condition: the accident nitrogen filling valve is started.

[0103] In a specific application, when the bed temperature of any module in the adsorption tower reaches or exceeds 65°C, the protective opening condition of the emergency nitrogen filling valve is triggered. Once this temperature threshold is reached, the system will immediately open the emergency nitrogen filling valve and fill nitrogen into the adsorption tower to quickly reduce the bed temperature and prevent possible thermal runaway or fire. This protection measure is the last resort in an emergency and is intended to protect personnel safety and equipment integrity.

[0104] Based on the above embodiment, after starting the emergency nitrogen filling valve, the method further includes:

[0105] Real-time monitoring of the temperature drop rate after the emergency nitrogen filling valve is activated;

[0106] If the temperature drop rate of the emergency nitrogen filling valve after activation is lower than the second preset rate, the nitrogen filling amount is increased.

[0107] Specifically:

[0108] After the emergency nitrogen filling valve is started, the system continues to use high-precision temperature sensors to monitor the temperature of the adsorption tower bed in real time.

[0109] The system calculates the rate of temperature drop after the nitrogen filling valve is activated, which is usually achieved by comparing the temperature changes in a short period of time.

[0110] According to the process requirements and safety standards, a second preset rate is set, which is a minimum acceptable temperature drop rate to determine whether it is necessary to increase the nitrogen filling amount.

[0111] The system compares the temperature drop rate monitored in real time with a second preset rate.

[0112] If the monitored temperature drop rate is lower than the second preset rate, the system will automatically increase the nitrogen filling amount of the nitrogen filling valve to improve the cooling effect. Increasing the nitrogen filling amount can be achieved by adjusting the valve opening or increasing the nitrogen pressure.

[0113] The embodiment of the present invention further provides an adsorption tower bed temperature control device; the specific device may include:

[0114] Temperature monitoring module, used to monitor bed temperature in real time;

[0115] A relationship model building module is used to build a relationship model between bed temperature and circulation volume compensation coefficient;

[0116] A circulation compensation determination module, for calculating a target circulation amount compensation coefficient corresponding to the current bed temperature according to the relationship model when the bed temperature is monitored to be higher than a preset threshold;

[0117] The circulation volume automatic adjustment module is used to apply the target circulation volume compensation coefficient to the circulation volume setting value to automatically adjust the circulation volume.

[0118] The adsorption tower bed temperature control device of the present embodiment is used to implement the aforementioned adsorption tower bed temperature control method. Therefore, the specific implementation method of the adsorption tower bed temperature control device can be seen in the embodiment part of the aforementioned adsorption tower bed temperature control method. For example, the temperature monitoring module, the relationship model building module, the circulation compensation determination module, and the circulation amount automatic adjustment module are respectively used to implement steps S101, S102, S103, and S104 in the above-mentioned adsorption tower bed temperature control method. Therefore, its specific implementation method can refer to the description of the corresponding each part of the embodiment, which will not be repeated here.

[0119] A specific embodiment of the present invention further provides an adsorption tower bed temperature control device, comprising: a memory for storing a computer program; and a processor for implementing the steps of the above-mentioned adsorption tower bed temperature control method when executing the computer program.

[0120] A specific embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned adsorption tower bed temperature control method are implemented.

[0121] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0122] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0123] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0124] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0125] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A method for controlling the bed temperature of an adsorption tower, characterized in that: include: Real-time monitoring of bed temperature; Construct a relationship model between bed temperature and circulation compensation coefficient; When the bed temperature is monitored to be higher than a preset threshold, a target circulation amount compensation coefficient corresponding to the current bed temperature is calculated according to the relationship model; The target circulation volume compensation coefficient is applied to the circulation volume setting value to automatically adjust the circulation volume.

2. The adsorption tower bed temperature control method according to claim 1, characterized in that: The real-time monitoring of bed temperature comprises: The bed temperature data is collected in real time and the fast Fourier transform algorithm is used to filter out the noise.

3. The adsorption tower bed temperature control method according to claim 1, characterized in that: The relationship model between bed temperature and circulation volume is constructed as follows: Based on historical data, a polynomial regression model is used, and the temperature change rate is introduced as an additional variable to establish a relationship model between bed temperature and circulation compensation coefficient: Y=aX 2 +bX+c+dΔX Where Y is the circulation compensation coefficient, X is the bed temperature, ΔX is the rate of change of bed temperature, a, b, c, and d are the model parameters obtained by data fitting.

4. The adsorption tower bed temperature control method according to claim 1, characterized in that: When the bed temperature is detected to be higher than the protection exit condition temperature threshold: Start countdown and warning for preset duration; If, after the countdown ends, the bed temperature is still higher than the protection exit condition temperature threshold, the circulation volume is automatically reduced and the auxiliary cooling system is started.

5. The method for controlling the bed temperature of an adsorption tower according to claim 4, characterized in that: During said countdown: Real-time monitoring of bed temperature change trend; If the bed temperature change trend is decreasing and the decreasing rate reaches a first preset rate, the early warning and subsequent operations are stopped.

6. The method for controlling the bed temperature of an adsorption tower according to claim 1, characterized in that: When the bed temperature is detected to be higher than the temperature threshold of the accident nitrogen filling valve protection opening condition: Start the emergency nitrogen filling valve.

7. The method for controlling the bed temperature of an adsorption tower according to claim 6, characterized in that: After starting the emergency nitrogen filling valve, the following steps are also included: Real-time monitoring of the temperature drop rate after the emergency nitrogen filling valve is activated; If the temperature drop rate of the emergency nitrogen filling valve after activation is lower than the second preset rate, the nitrogen filling amount is increased.

8. An adsorption tower bed temperature control device, characterized in that: include: Temperature monitoring module, used to monitor bed temperature in real time; A relationship model building module is used to build a relationship model between bed temperature and circulation volume compensation coefficient; A circulation compensation determination module, for calculating a target circulation amount compensation coefficient corresponding to the current bed temperature according to the relationship model when the bed temperature is monitored to be higher than a preset threshold; The circulation volume automatic adjustment module is used to apply the target circulation volume compensation coefficient to the circulation volume setting value to automatically adjust the circulation volume.

9. An adsorption tower bed temperature control device, characterized in that: include: Memory for storing computer programs; A processor is used to implement the steps of an adsorption tower bed temperature control method as described in any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the adsorption tower bed temperature control method as described in any one of claims 1 to 7 are implemented.

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