A method and device for stabilizing monitoring parameters of pulse extraction column

Abstract

The present application belongs to the technical field of spent fuel reprocessing, and specifically relates to a method and device for stabilizing the monitoring parameters of a pulse extraction column. The method comprises: obtaining the target parameters of the pulse extraction column; the target parameters are any one of liquid level, interface, two-phase density and column weight; judging whether the fluctuation of the target parameters exceeds a first preset threshold; if so, adjusting the damping coefficient of the corresponding pulse column measurement pressure transmitter according to the fluctuation of the target parameters. The embodiment of the present application is based on the debugging of the pulse extraction column, and the large fluctuation of the pulse column parameters causes the difficulty of reference, increases the damping coefficient, solves the related interference and errors, and provides technical support and reference for the debugging of the extraction column parameters in the later stage of post-processing.

Description

Technical Field

[0001] The present application belongs to the technical field of spent fuel reprocessing, and specifically relates to a method and a device for stabilizing monitoring parameters of a pulse extraction column. Background Art

[0002] The pulse extraction column is a common extraction equipment in the production process of spent fuel reprocessing. Its main function is extraction or stripping. Its structure is divided into sieve plate column and baffle plate column. In the reprocessing production process, the pulse extraction column is a two-phase countercurrent contact extraction equipment, which directly affects the quality of the product and the discharge of waste liquid, and more seriously causes the loss of uranium and plutonium and the occurrence of criticality safety accidents.

[0003] In order to achieve the expected stable operation effect, the pulse extraction column must undergo comprehensive debugging and research, be familiar with the structure, column capacity and principle of the pulse extraction column, and explore the best operating conditions and the most stable parameter range of the pulse extraction column through a series of debugging processes such as monomer debugging, water test, acid test, chemical test, cold uranium test and heat test. Since the flowing liquid in the pulse extraction column is a highly radioactive material, the parameters can only be monitored by a remote blowing instrument device. Generally, 6 blowing instrument tubes are installed in the pulse extraction column, which cooperate with each other to complete the measurement of relevant parameters such as liquid level, interface, organic phase density, water phase density, column weight, etc. This series of processes requires the remote blowing instrument device to monitor and feedback the most real and reliable monitoring results as the basis for judgment. During the post-processing process debugging, the various parameters of the pulse extraction column are monitored by the remote blowing instrument device. The pressure at different positions in the pulse extraction column is fed back to the differential pressure transmitter, and then the pressure difference value is brought into the calculation formula to feedback the various hydraulic parameters of the pulse extraction column. By observing the above parameters, the process personnel make a judgment on whether the pulse extraction column is running stably. If the parameters monitored by the remote blowing instrument device fluctuate greatly and the monitoring accuracy is inaccurate, it will cause the process personnel to be unable to make accurate judgments and take effective and timely adjustment measures.

[0004] However, the pulse extraction column uses compressed gas from the buffer tank to provide power to the pulse extraction column to enhance the flow and mixing of the liquid. In this process, the monitoring of the blowing instrument device will be affected to a certain extent, resulting in a large fluctuation range of the monitoring data, which cannot be used as a reference for whether the pulse extraction column is running stably. Summary of the invention

[0005] The purpose of the present application is to provide a method and device for monitoring parameters of a stable pulse extraction column, so as to solve the problem that the pulse extraction column parameters monitored in the prior art fluctuate greatly and cannot be used as a reference for whether the operation is stable.

[0006] Technical solution to achieve the purpose of this application:

[0007] In a first aspect, an embodiment of the present application provides a method for stabilizing monitoring parameters of a pulse extraction column, the method comprising:

[0008] Obtaining a target parameter of a pulse extraction column; the target parameter is any one of a liquid level, an interface, a two-phase density, and a column weight;

[0009] Determining whether the fluctuation of the target parameter exceeds a first preset threshold;

[0010] If so, the damping coefficient of the corresponding pulse column pressure transmitter is adjusted according to the fluctuation of the target parameter.

[0011] Optionally, the damping coefficient of the corresponding pulse column pressure transmitter is adjusted according to the fluctuation of the target parameter, and then the method further includes:

[0012] When the fluctuation of the target parameter still exceeds the second preset threshold, software filtering is added; the second preset threshold is less than the first preset threshold.

[0013] Optionally, the adding of software filtering specifically includes:

[0014] The filtering time is set according to the fluctuation of the target parameter.

[0015] Optionally, adjusting the damping coefficient of the corresponding pulse column pressure transmitter according to the fluctuation of the target parameter specifically includes:

[0016] As the damping coefficient is adjusted, the delay time and the instantaneous measurement value error are observed so that the error is within a preset allowable range.

[0017] A second aspect of the embodiment of the present application provides a device for stabilizing pulse extraction column monitoring parameters, the device comprising:

[0018] A parameter acquisition module, used to acquire a target parameter of the pulse extraction column; the target parameter is any one of liquid level, interface, two-phase density and column weight;

[0019] A first judgment module, used to judge whether the fluctuation of the target parameter exceeds a first preset threshold;

[0020] The coefficient adjustment module is used to adjust the damping coefficient of the corresponding pulse column measurement pressure transmitter according to the fluctuation of the target parameter when the judgment result of the first judgment module is yes.

[0021] Optionally, the device further includes:

[0022] A second judgment module, used to judge whether the fluctuation of the target parameter exceeds a second preset threshold; the second preset threshold is less than the first preset threshold;

[0023] The filter setting module is used to add software filtering when the second judgment module determines that the fluctuation of the target parameter still exceeds the second preset threshold.

[0024] Optionally, the filtering setting module is specifically used to:

[0025] The filtering time is set according to the fluctuation of the target parameter.

[0026] Optionally, the coefficient adjustment module is specifically used to:

[0027] As the damping coefficient is adjusted, the delay time and the instantaneous measurement value error are observed so that the error is within a preset allowable range.

[0028] A third aspect of an embodiment of the present application provides a computer scale storage medium on which a computer program is stored; when the computer program is executed, any one of the methods for stabilizing pulse extraction column monitoring parameters provided in the first aspect of an embodiment of the present application is implemented.

[0029] The fourth aspect of the embodiments of the present application provides an electronic device, including a memory and a processor; a computer program is stored in the memory, and when the processor runs the computer program, any one of the methods for stabilizing the monitoring parameters of a pulse extraction column provided in the first aspect of the embodiments of the present application is implemented.

[0030] The beneficial technical effects of this application are:

[0031] The embodiment of the present application provides a method and device for stabilizing the monitoring parameters of a pulse extraction column, which includes: obtaining the target parameter of the pulse extraction column; the target parameter is any one of the liquid level, interface, two-phase density and column weight; judging whether the fluctuation of the target parameter exceeds a first preset threshold; if so, adjusting the damping coefficient of the corresponding pulse column measurement pressure transmitter according to the fluctuation of the target parameter. The embodiment of the present application is based on the debugging of the pulse extraction column, and increases the damping coefficient to solve the related interference and errors caused by the large fluctuation of the pulse column parameters, and provides technical support and reference for the debugging of the extraction column parameters in the later post-processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic flow chart of a method for stabilizing monitoring parameters of a pulse extraction column provided in an embodiment of the present application;

[0033] Figure 2a-2c A schematic diagram of different filtering times in a method for stabilizing monitoring parameters of a pulse extraction column provided in an embodiment of the present application;

[0034] Figure 3A schematic diagram of the effect of a method for stabilizing monitoring parameters of a pulse extraction column provided in an embodiment of the present application. DETAILED DESCRIPTION

[0035] In order to make those skilled in the art better understand the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only a part of the embodiments of the present application, not all. Based on the embodiments recorded in the present application, all other embodiments obtained by those skilled in the art without paying creative work are within the scope of protection of the present application.

[0036] In order to solve the problems of the prior art, the embodiments of the present application provide a method of increasing the damping coefficient of the differential pressure transmitter of the instrument device for blowing the pulse extraction column to remove high-frequency interference, low-frequency interference and random interference, or data that is distorted and differs greatly from the actual data due to poor reliability of the on-site transmitter, so that the pulse extraction column parameter monitoring is more accurate and reliable. At the same time, software filtering is added to the central control system of the DCS screen to stabilize the curves of various parameters of the pulse extraction column on the DCS screen, avoiding the pulse column being adjusted back and forth due to large fluctuations and incorrect judgments by process personnel, thereby disrupting normal hydraulic operation. The increase in the damping coefficient and filtering allows the parameters to operate stably within a certain range, and the extraction and stripping effects of the pulse column are optimal.

[0037] Based on the above content, in order to clearly and in detail illustrate the above advantages of the present application, the specific implementation methods of the present application will be described below in conjunction with the accompanying drawings.

[0038] See also Figure 1 , which is a schematic flow chart of a method for stabilizing pulse extraction column monitoring parameters provided in an embodiment of the present application.

[0039] A method for stabilizing pulse extraction column monitoring parameters provided in an embodiment of the present application includes:

[0040] Step S101: obtaining a target parameter of a pulse extraction column; the target parameter is any one of liquid level, interface, two-phase density and column weight;

[0041] Step S102: Determine whether the fluctuation of the target parameter exceeds a first preset threshold; if so, execute step S103.

[0042] Step S103: adjusting the damping coefficient of the corresponding pulse column pressure transmitter according to the fluctuation of the target parameter.

[0043] It should be noted that damping refers to any process that reduces vibration, motion or energy transfer. In physics and engineering, damping usually involves the consumption of energy, so that the vibration amplitude of the system decreases over time and eventually reaches a stable state. The pressure transmitter is an instrument that converts the physical pressure variable into an electrical signal recognizable by the control system. There is a specific continuous functional relationship between the output signal and the pressure variable. In the pressure measurement process, the damping coefficient directly affects the output characteristics of the instrument. The smaller the damping coefficient, the faster the rapid response of the instrument. Increasing the damping coefficient reduces the rapidity of the instrument, which can solve the problem caused by excessive fluctuations in the measurement parameters. During the adjustment process of the hydraulic parameters of the pulse extraction column, some parameters fluctuate too much and cannot be used as a reference, which restricts debugging and operation. Therefore, the damping coefficient is increased for the parameter instrument monitoring pressure transmitter to solve such problems.

[0044] In one example, the filter damping calculation formula for the pressure transmitters of all pulse extraction columns in a post-processing demonstration plant is shown in Formula 1:

[0045]

[0046] Where, P is the final value after filter damping calculation, P0 is the previous filter damping calculation value; P1 is the current filter damping calculation value; D is the damping coefficient, which can be a value between 0 and 32.

[0047] By adjusting the size of D, the response effect of the filter damping is adjusted to make the monitoring parameters tend to be stable. With the increase of the damping coefficient of the instrument, after the delay of the corresponding time, the error of the instantaneous measurement value will gradually increase, which has exceeded the allowable error range of the instrument by 0.05%; the increase of the damping coefficient has little effect on the error of the final stable value. Except for a few exceeding the error precision, the errors of the remaining final pressure values ​​are all within the allowable range of 0.05%; with the increase of the damping coefficient of the instrument, the time required to reach the final value is longer, and the longest time can reach about 3 minutes, and the rapidity cannot be guaranteed. Judging from the average deviation of the final indication and the time to reach it, the damping value setting should generally not exceed 3s. However, in the actual operation process, the individual parameters of some pulse columns still fluctuate greatly. The damping value can be appropriately increased to make the parameters of the pulse column tend to be stable.

[0048] In some possible implementations of the present application, after increasing the damping coefficient, the instrument monitoring data will tend to be stable. For individual parameters with a large fluctuation range, software filtering is added to the central control system to make the parameter curve more stable. Then, step S103 may further include:

[0049] When the fluctuation of the target parameter still exceeds the second preset threshold, software filtering is added; the second preset threshold is less than the first preset threshold.

[0050] Filtering is a basic technique in signal processing, which aims to extract useful information from signals containing noise or unwanted components. Depending on its design and function, the filter can pass or block specific frequency components in the signal, thereby modifying and optimizing the signal.

[0051] The DCS system of a post-processing demonstration plant has a signal conversion and processing function for AI signals. However, due to the complexity of the post-processing plant, there are many electrical equipment, high-frequency noise, low-frequency signals, and specific frequency bands, which will affect the parameter display on the DCS screen. Therefore, software filtering is added to remove the noise, electromagnetic signals, and other frequencies that affect the real measurement value during the instrument monitoring process. This allows multiple instantaneous signals to be taken, averaged, and finally a reliable value is obtained.

[0052] Filter time constant: first-order inertial filter, in seconds. It can resist high-frequency and low-frequency interference, remove large random interference, or interference caused by large input jumps due to distortion caused by poor reliability of field transmitters, so that the signal curve becomes smooth, such as the fluctuation of the liquid level in the tank causing the measured liquid level signal to fluctuate. The shorter the filter time, the closer the curve is to the true value; the longer the filter time, the smoother the curve. It can be determined from the applicability of the signal conversion function that increasing the filter time can eliminate the fluctuation interference. The principle of the first-order inertial filter is as follows:

[0053] Y(n)=αX(n)+(1-α)Y(n-1) (2)

[0054] Where α is the filter coefficient; X(n) is the current sampling value; Y(n-1) is the previous filter output value; and Y(n) is the current filter output value.

[0055] According to the different degrees of fluctuation of the pulse column parameters of each baffle, different damping and filtering are set to solve the abnormalities caused by the extraction column instrument monitoring. The first-order inertial filter uses the current sampling value and the last filtering output value for weighting to obtain the effective filtering value, so that the output has a feedback effect on the input. To verify the filtering effect, the filter time is set to 1s, 5s, and 10s for testing. Figure 2a-2c shown.

[0056] From the test results of different filtering times, we can see that the smaller the filtering time, the higher the sensitivity, the closer the filtering is to the true value, but the more unstable the filtering result; the larger the filtering time, the more stable the filtering result, but the sensitivity is relatively reduced. The first-order filter cannot perfectly balance stability and sensitivity. Within the acceptable sensitivity range, try to increase the filtering time to ensure the stability of the final curve.

[0057] A post-processing demonstration plant was selected, in which a pulse extraction column was tested in real time. The data fluctuated greatly. Afterwards, damping was added to the pulse extraction column. Although the parameter fluctuation decreased, the stability was still poor. Afterwards, software filtering was added to the central control system, and the curve tended to be smooth and stable. Figure 3 shown.

[0058] In one example, the adding of software filtering specifically includes:

[0059] The filtering time is set according to the fluctuation of the target parameter.

[0060] In the specific implementation, you can first set a 3s filter time, and then adjust the filter time appropriately according to the fluctuation range of the instrument monitoring value display. The filter time should not be too large or too small. Finally, the final filter value is determined according to the parameter curve.

[0061] In some possible implementations of the embodiments of the present application, adjusting the damping coefficient of the corresponding pulse column pressure transmitter according to the fluctuation of the target parameter specifically includes:

[0062] As the damping coefficient is adjusted, the delay time and the instantaneous measurement value error are observed so that the error is within a preset allowable range.

[0063] In the embodiment of the present application, the damping coefficient of the differential pressure transmitter of the instrument device for blowing the pulse extraction column is increased to remove high-frequency interference, low-frequency interference and random interference, or data that is distorted and differs greatly from the actual data due to poor reliability of the on-site transmitter, so that the monitoring of the pulse extraction column parameters is more accurate and reliable. At the same time, software filtering is added to the central control system of the DCS screen to stabilize the curves of various parameters of the pulse extraction column on the DCS screen, avoiding large fluctuations and incorrect judgments by process personnel, which causes the pulse column to be adjusted back and forth and disrupts normal hydraulic operation. The increase in damping and filtering allows the parameters to operate stably within a certain range, and the extraction and stripping effects of the pulse column are optimal.

[0064] Based on the method for stabilizing the monitoring parameters of a pulse extraction column provided in the above embodiment, an embodiment of the present application also provides a device for stabilizing the monitoring parameters of a pulse extraction column.

[0065] An embodiment of the present application provides a device for stabilizing pulse extraction column monitoring parameters, comprising:

[0066] A parameter acquisition module, used to acquire a target parameter of the pulse extraction column; the target parameter is any one of liquid level, interface, two-phase density and column weight;

[0067] A first judgment module, used to judge whether the fluctuation of the target parameter exceeds a first preset threshold;

[0068] The coefficient adjustment module is used to adjust the damping coefficient of the corresponding pulse column measurement pressure transmitter according to the fluctuation of the target parameter when the judgment result of the first judgment module is yes.

[0069] In some possible implementations of the embodiments of the present application, the device further comprises:

[0070] A second judgment module, used to judge whether the fluctuation of the target parameter exceeds a second preset threshold; the second preset threshold is less than the first preset threshold;

[0071] The filter setting module is used to add software filtering when the second judgment module determines that the fluctuation of the target parameter still exceeds the second preset threshold.

[0072] In one example, the filtering setting module can be specifically used to:

[0073] The filtering time is set according to the fluctuation of the target parameter.

[0074] In some possible implementations of the embodiments of the present application, the coefficient adjustment module may be specifically used for:

[0075] As the damping coefficient is adjusted, the delay time and the instantaneous measurement value error are observed so that the error is within a preset allowable range.

[0076] Based on the method and device for stabilizing the monitoring parameters of a pulse extraction column provided in the above embodiments, the embodiments of the present application also provide a computer scale storage medium on which a computer program is stored; when the computer program is executed, any one of the methods for stabilizing the monitoring parameters of a pulse extraction column provided in the above embodiments is implemented.

[0077] Based on the method and device for stabilizing the monitoring parameters of a pulse extraction column provided in the above embodiment, the embodiment of the present application also provides an electronic device, including a memory and a processor; a computer program is stored in the memory, and when the processor runs the computer program, any one of the methods for stabilizing the monitoring parameters of a pulse extraction column provided in the above embodiment is implemented.

[0078] The present application is described in detail above in conjunction with the accompanying drawings and embodiments, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present application. Any content not described in detail in the present application can adopt the existing technology.

Claims

1. A method for stabilizing monitoring parameters of a pulse extraction column, characterized in that: The method comprises: Obtaining a target parameter of a pulse extraction column; the target parameter is any one of a liquid level, an interface, a two-phase density, and a column weight; Determining whether the fluctuation of the target parameter exceeds a first preset threshold; If so, the damping coefficient of the corresponding pulse column pressure transmitter is adjusted according to the fluctuation of the target parameter.

2. The method for stabilizing pulse extraction column monitoring parameters according to claim 1, characterized in that: According to the fluctuation of the target parameter, the damping coefficient of the corresponding pulse column pressure transmitter is adjusted, and then the following is further included: When the fluctuation of the target parameter still exceeds the second preset threshold, software filtering is added; the second preset threshold is less than the first preset threshold.

3. The method for stabilizing pulse extraction column monitoring parameters according to claim 2, characterized in that: The added software filtering specifically includes: The filtering time is set according to the fluctuation of the target parameter.

4. The method for stabilizing pulse extraction column monitoring parameters according to any one of claims 1 to 3, characterized in that: The step of adjusting the damping coefficient of the corresponding pulse column pressure transmitter according to the fluctuation of the target parameter specifically includes: As the damping coefficient is adjusted, the delay time and the instantaneous measurement value error are observed so that the error is within a preset allowable range.

5. A device for stabilizing monitoring parameters of a pulse extraction column, characterized in that: The device comprises: A parameter acquisition module, used to acquire a target parameter of the pulse extraction column; the target parameter is any one of liquid level, interface, two-phase density and column weight; A first judgment module, used to judge whether the fluctuation of the target parameter exceeds a first preset threshold; The coefficient adjustment module is used to adjust the damping coefficient of the corresponding pulse column measurement pressure transmitter according to the fluctuation of the target parameter when the judgment result of the first judgment module is yes.

6. The device for monitoring parameters of a stable pulse extraction column according to claim 5, characterized in that: The device further comprises: A second judgment module, used to judge whether the fluctuation of the target parameter exceeds a second preset threshold; the second preset threshold is less than the first preset threshold; The filter setting module is used to add software filtering when the second judgment module determines that the fluctuation of the target parameter still exceeds the second preset threshold.

7. The device for monitoring parameters of a stable pulse extraction column according to claim 6, characterized in that: The filtering setting module is specifically used for: The filtering time is set according to the fluctuation of the target parameter.

8. The device for stabilizing monitoring parameters of a pulse extraction column according to any one of claims 5 to 7, characterized in that: The coefficient adjustment module is specifically used for: As the damping coefficient is adjusted, the delay time and the instantaneous measurement value error are observed so that the error is within a preset allowable range.

9. A computer scale storage medium, characterized in that: A computer program is stored thereon; when the computer program is executed, the method for monitoring parameters of a stable pulse extraction column as described in any one of claims 1 to 4 is implemented.

10. An electronic device, characterized in that: It comprises a memory and a processor; a computer program is stored in the memory, and when the processor runs the computer program, the method for stabilizing the monitoring parameters of the pulse extraction column as described in any one of claims 1 to 4 is implemented.

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