Kr collection method and system based on silica gel low-temperature adsorption, terminal and storage medium

Abstract

The application relates to a Kr collection method and system based on silica gel low-temperature adsorption, a terminal and a storage medium, and relates to the technical field of Kr gas collection.The application comprises the following steps: acquiring a chromatographic separation graph; analyzing the chromatographic separation graph to determine a krypton peak time window, a redundant peak front window and a redundant peak rear window; setting a pre-sequence air collection window in front of the redundant peak front window according to a preset pre-sequence air collection time; analyzing the pre-sequence air collection window, the krypton peak time window, the redundant peak front window and the redundant peak rear window to determine a redundant adsorption window and a gas bag collection gas; and analyzing the gas bag collection gas and the redundant adsorption window to control the low-temperature adsorption of Kr gas by the preset low-concentration adsorption silica gel and high-concentration adsorption silica gel. The application has the effect of improving the purity of the collected Kr gas.

Description

Technical Field

[0001] This application relates to the technical field of Kr gas collection, and in particular to Kr collection methods, systems, terminals and storage media based on low-temperature adsorption of silica gel. Background Technology

[0002] Kr collection based on low-temperature adsorption of silica gel refers to the process of capturing the kr fraction according to the kr peak time window given by the preparative chromatographic separation method, and then adsorbing and collecting the kr gas with silica gel cooled to liquid nitrogen temperature.

[0003] In related technologies, when performing low-temperature adsorption of Kr on silica gel, the chromatogram of the preceding gas is first analyzed to determine the krypton peak time window. A certain amount of redundancy is added before and after the krypton peak time window to finally determine the complete adsorption time window for Kr. After determining the adsorption time window, the carrier gas flow is controlled to flow through the low-temperature adsorption device on silica gel at a fixed flow rate to achieve the collection of Kr gas.

[0004] Regarding the aforementioned technologies, when performing low-temperature adsorption of Kr gas on silica gel based on an adsorption time window, since the adsorption time window is a fixed time interval generated from the chromatogram, the chromatogram results may drift, leading to incorrect truncation of the Kr peak. Furthermore, within the adsorption time window, due to redundant adsorption time and periods of low Kr gas concentration, the adsorbed Kr gas may contain excessively high levels of impurities, resulting in low purity of Kr gas adsorbed at low temperatures on silica gel. There is still room for improvement. Summary of the Invention

[0005] To improve the purity of the collected Kr gas products, this application provides a Kr collection method, system, terminal, and storage medium based on low-temperature adsorption of silica gel.

[0006] Firstly, this application provides a method for collecting Kr based on low-temperature adsorption of silica gel, employing the following technical solution:

[0007] Kr collection methods based on low-temperature adsorption of silica gel include:

[0008] Obtain the chromatogram;

[0009] Analyze the chromatograms to determine the krypton peak time window, the redundant peak front window, and the redundant peak back window;

[0010] A preceding gas collection window is set before the redundant peak window according to the preset preceding gas collection time.

[0011] The preceding gas collection window, the krypton peak time window, the redundant peak pre-window, and the redundant peak post-window were analyzed to determine the redundant adsorption window and the gas collected by the gasbag.

[0012] The gas collected by the gasbag and the redundant adsorption window were analyzed to control the low-temperature adsorption of Kr gas by the preset low-concentration and high-concentration adsorption silica gel.

[0013] Optionally, the steps of analyzing the chromatogram to determine the krypton peak time window, the redundant peak pre-window, and the redundant peak post-window include:

[0014] The chromatogram is expanded according to a preset redundant time period to identify redundant chromatograms;

[0015] Information is extracted from redundant chromatograms to determine the highest chromatographic peak.

[0016] Calculate the product of the preset residual peak percentage and the highest chromatographic peak value to determine the residual peak initiation point;

[0017] The redundant chromatogram is truncated based on the starting node of the residual peak to determine the pre-window, time window, and post-window of the redundant peak.

[0018] Optionally, the steps of analyzing the preceding gas collection window, the krypton peak time window, the redundant peak pre-window, and the redundant peak post-window to determine the redundant adsorption window and the gas collected by the gasbag include:

[0019] The gas is collected by the preset gas collection bladder according to the preceding time window to determine the gas to be collected by the bladder.

[0020] The gas collected by the airbag was analyzed to determine the preceding Kr concentration;

[0021] Determine whether the preceding Kr concentration is greater than a preset preceding Kr threshold;

[0022] If it is not greater than, the krypton peak time window, redundant peak pre-window and redundant peak post-window are integrated to determine the redundant adsorption window;

[0023] If the concentration is greater than the preset low-concentration adsorption silica gel, the Kr gas in the gas collected by the airbag will be adsorbed at low temperature.

[0024] The concentration of preceding Kr, the time window of the krypton peak, the pre-peak window of the redundant peak, and the post-peak window of the redundant peak were analyzed to determine the redundant adsorption window.

[0025] Optionally, the steps of analyzing the preceding Kr concentration, krypton peak time window, redundant peak pre-window, and redundant peak post-window to determine the redundant adsorption window include:

[0026] Calculate the product of the preceding Kr concentration and the preceding gas collection time to determine the total preceding Kr contribution;

[0027] Perform duration analysis on redundant peak-front windows to determine the total peak-front duration;

[0028] Input the total contribution of preceding Kr, the concentration of preceding Kr, and the total pre-peak duration into the preset airbag pre-peak duration model to determine the pre-peak drift duration;

[0029] The redundant peak-before window is truncated backward based on the peak-before drift time, and the krypton peak time window and the redundant peak-after window are moved forward based on the peak-before drift time to determine the drift peak-before window, the drift krypton peak window, and the drift peak-after window.

[0030] The drift peak front window, drift krypton peak window, and drift peak back window are integrated to determine the redundant adsorption window.

[0031] Optionally, the steps of analyzing the gas collected by the gasbag and the redundant adsorption window to control the low-temperature adsorption of Kr gas by preset low-concentration and high-concentration adsorption silica gels include:

[0032] Data is extracted from redundant time windows to determine the pre-peak time window, post-peak time window, and theoretical krypton peak window;

[0033] Obtain the chromatographic carrier gas flow rate;

[0034] The chromatographic carrier gas flow rate was analyzed, and low-concentration adsorbed silica gel was controlled to perform low-temperature adsorption of Kr gas within the pre-peak time window.

[0035] Calculate the product of the chromatographic carrier gas flow rate and the preset intra-peak flow rate coefficient to determine the krypton peak carrier gas flow rate;

[0036] Kr gas was controlled to flow at the kr peak carrier gas flow rate within the theoretical kr peak window, and Kr gas was adsorbed at low temperature using high-concentration adsorption silica gel.

[0037] The chromatographic carrier gas flow rate was analyzed, and low-concentration adsorbed silica gel was controlled to perform low-temperature adsorption of Kr gas within the post-peak time window.

[0038] Optionally, the steps of analyzing the chromatographic carrier gas flow rate and controlling the low-concentration adsorption silica gel for low-temperature adsorption of Kr gas within the pre-peak time window include:

[0039] Obtain the pre-peak Kr concentration;

[0040] Calculate the ratio of the pre-peak Kr concentration to the preset pre-peak concentration threshold to determine the current concentration percentage;

[0041] Calculate the product of the preset pre-peak flow rate coefficient and the chromatographic carrier gas flow rate to determine the pre-peak base flow rate;

[0042] Calculate the product of the preset peak deviation coefficient, the chromatographic carrier gas flow rate, and the current concentration percentage to determine the pre-peak adjustment amount;

[0043] Calculate the difference between the pre-peak base velocity and the pre-peak adjustment amount to determine the pre-peak carrier gas velocity;

[0044] The preset chromatographic separation gas is controlled to flow at the pre-peak carrier gas flow rate, and Kr gas is adsorbed at low temperature with low-concentration adsorption silica gel. The pre-peak Kr concentration is continuously obtained and cyclically calculated to update the pre-peak carrier gas flow rate in real time.

[0045] Optionally, the steps of analyzing the chromatographic carrier gas flow rate and controlling the low-concentration adsorption silica gel for low-temperature adsorption of Kr gas within the post-peak time window include:

[0046] Obtain the Kr concentration after the peak;

[0047] Determine whether the post-peak Kr concentration is greater than the preset high-concentration residual threshold;

[0048] If it is greater than the preset post-peak low flow rate coefficient and the chromatographic carrier gas flow rate, the post-peak carrier gas flow rate is determined.

[0049] If it is not greater than, then determine whether the Kr concentration after the peak is less than the preset low concentration residual threshold.

[0050] If it is less than, calculate the product of the preset post-peak high flow rate coefficient and the chromatographic carrier gas flow rate to determine the post-peak carrier gas flow rate;

[0051] If it is not less than, then input the high flow rate coefficient after the peak, the low flow rate coefficient after the peak, the chromatographic carrier gas flow rate, the high concentration residual threshold, the low concentration residual threshold and the Kr concentration after the peak into the preset medium concentration residual flow rate model to determine the carrier gas flow rate after the peak.

[0052] The preset chromatographic separation gas is controlled to flow at the post-peak carrier gas flow rate. Low-concentration adsorption silica gel is used to adsorb Kr gas at low temperature, and the post-peak Kr concentration is continuously obtained for cyclic calculation to update the post-peak carrier gas flow rate in real time.

[0053] Secondly, this application provides a Kr collection system based on low-temperature adsorption of silica gel, employing the following technical solution:

[0054] A Kr collection system based on low-temperature adsorption of silica gel includes:

[0055] The acquisition module is used to acquire chromatographic separation patterns;

[0056] A memory for storing the program of the Kr collection method based on low-temperature adsorption of silica gel as described in any of the preceding claims;

[0057] The processor and the program in the memory can be loaded and executed by the processor to implement the Kr collection method based on low-temperature adsorption of silica gel as described in any of the above.

[0058] Thirdly, this application provides a smart terminal, which adopts the following technical solution:

[0059] A smart terminal includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed as described in any of the preceding claims for the collection of Kr based on low-temperature adsorption of silica gel.

[0060] Fourthly, this application provides a computer storage medium capable of storing corresponding programs, which facilitates improving the purity of the collected Kr gas products, and adopts the following technical solution:

[0061] A computer-readable storage medium storing a computer program that can be loaded by a processor and executed any of the above-described Kr collection methods based on low-temperature adsorption of silica gel.

[0062] In summary, this application includes at least one of the following beneficial technical effects:

[0063] 1. By analyzing the chromatogram, the krypton peak time window, redundant peak pre-window, and redundant peak post-window corresponding to the chromatogram are determined. Then, a preceding gas collection window is set before the redundant peak pre-window according to the preceding gas collection time. The gas collection bladder is controlled to collect the gas within the preceding time window. The krypton peak time window, redundant peak pre-window, and redundant peak post-window are calibrated according to the gas collected by the bladder. The calibrated time windows are integrated to determine the redundant adsorption window, thereby eliminating data drift interference from the chromatograph. The redundant adsorption window is determined based on the measured data of the gas collected by the bladder, thereby improving the accuracy of Kr gas interception. Based on the gas collected by the bladder and the redundant adsorption window, low-concentration and high-concentration adsorption silica gel are controlled to perform low-temperature adsorption of Kr gas, thereby improving the purity of the collected Kr gas product.

[0064] 2. By analyzing the gas collected by the gasbag, the preceding Kr concentration is determined. If the preceding Kr concentration is not greater than the preceding Kr threshold, it indicates that the chromatogram result is correct and no calibration is required. Therefore, the krypton peak time window, the redundant peak pre-window, and the redundant peak post-window are integrated to determine the redundant adsorption window. If the preceding Kr concentration is greater than the preceding Kr threshold, it indicates that the chromatogram result is incorrect and the krypton peak appears prematurely. The krypton peak time window needs to be adjusted. Therefore, the preceding Kr concentration, the krypton peak time window, the redundant peak pre-window, and the redundant peak post-window are analyzed to determine the redundant adsorption window. At the same time, the low-concentration adsorption silica gel is controlled to adsorb the gas collected by the gasbag at low temperature, thereby increasing the amount of Kr gas collected.

[0065] 3. By extracting data from redundant time windows, the pre-peak time window, post-peak time window, and theoretical krypton peak window are determined. Within the pre-peak and post-peak time windows, where the Kr concentration is low, low-concentration adsorption silica gel is used for low-temperature adsorption of Kr gas. Conversely, within the theoretical krypton peak window, where the Kr concentration is high, high-concentration adsorption silica gel is used for low-temperature adsorption of Kr gas. This reduces adsorption impurities and improves Kr adsorption efficiency. Attached Figure Description

[0066] Figure 1 This is a flowchart of the Kr collection method based on low-temperature adsorption of silica gel in the embodiments of this application.

[0067] Figure 2 This is a flowchart illustrating the analysis of chromatographic separation patterns in this application embodiment to determine the krypton peak time window, redundant peak pre-window, and redundant peak post-window.

[0068] Figure 3 This embodiment of the application analyzes the preceding gas collection window, the krypton peak time window, the redundant peak pre-window, and the redundant peak post-window to determine the redundant adsorption window and the flowchart for gas collection by the gasbag.

[0069] Figure 4 This is a flowchart illustrating the analysis of preceding Kr concentration, krypton peak time window, redundant peak pre-window, and redundant peak post-window in this application embodiment to determine the redundant adsorption window.

[0070] Figure 5 This is a flowchart illustrating the process of analyzing the gas collected by the airbag and the redundant adsorption window in this embodiment of the application to control the low-temperature adsorption of Kr gas by preset low-concentration and high-concentration adsorption silica gel.

[0071] Figure 6 This is a flowchart illustrating the analysis of the chromatographic carrier gas flow rate in this embodiment of the application, and the control of low-concentration adsorbed silica gel for low-temperature adsorption of Kr gas within the pre-peak time window.

[0072] Figure 7 This is a flowchart illustrating the process of analyzing the chromatographic carrier gas flow rate and controlling the low-concentration adsorption silica gel to perform low-temperature adsorption of Kr gas within the post-peak time window in this application embodiment. Detailed Implementation

[0073] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figures 1 to 7 The present application will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the application.

[0074] This application discloses a method, system, terminal, and storage medium for collecting Kr based on low-temperature adsorption of silica gel. Specifically, it discloses a processing terminal, a gas collection bag, high-concentration adsorbent silica gel, and low-concentration adsorbent silica gel. The processing terminal is communicatively connected to the gas collection bag, the high-concentration adsorbent silica gel, and the low-concentration adsorbent silica gel to achieve information interaction and control. The processing terminal acquires a chromatographic separation diagram, analyzes the chromatographic separation diagram, and determines the kr peak time window, redundant peak pre-window, and redundant peak post-window corresponding to the chromatographic separation diagram. Then, based on the previous gas collection time, a previous gas collection window is set before the redundant peak pre-window. The gas collection bag is controlled to collect the gas within the previous time window. The kr peak time window, redundant peak pre-window, and redundant peak post-window are calibrated based on the gas collected by the bag, and the calibrated time windows are integrated to determine the redundant adsorption window, thereby eliminating data drift interference from the chromatograph. The redundant adsorption window is determined based on the measured data of the gas collected by the bag, thereby improving the accuracy of Kr gas interception. Based on the gas collected by the bag and the redundant adsorption window, the low-concentration adsorbent silica gel and the high-concentration adsorbent silica gel are controlled to perform low-temperature adsorption of Kr gas, thereby improving the purity of the collected Kr gas product.

[0075] Reference Figure 1 This application discloses a method for collecting Kr based on low-temperature adsorption of silica gel, including the following steps:

[0076] Step S100: Obtain the chromatographic separation chromatogram.

[0077] Among them, the chromatographic separation chromatogram refers to the krypton peak chromatogram obtained when Kr gas is initially purified by a chromatograph, which is determined by the processing terminal by directly retrieving the operating data of the chromatograph.

[0078] Step S101: Analyze the chromatogram to determine the krypton peak time window, the redundant peak front window, and the redundant peak back window.

[0079] The krypton peak time window refers to the main concentration time window of Kr gas in the chromatogram. The redundant peak front window refers to the redundant time window at the low concentration position of Kr gas during the initial separation of the chromatogram. The redundant peak back window refers to the redundant time window at the low concentration position of Kr gas when it is about to be completely separated in the chromatogram. All three are determined by the processing terminal through analysis of the chromatogram. Specific analysis steps are described in [reference needed]. Figure 2 The steps in the process.

[0080] Step S102: Set a preceding gas collection window in front of the redundant peak window according to the preset preceding gas collection time.

[0081] The preliminary gas collection time refers to the time for collecting gas through the gas collection bag before the Kr gas undergoes low-temperature adsorption. It is determined by the operator through a comprehensive analysis of the separation performance of the chromatograph during the preliminary purification process and the purity requirements of the Kr gas.

[0082] The preceding gas collection window refers to the time window during which gas is collected through the gas collection bladder. It is determined by the processing terminal generating a preceding gas collection time window that is immediately adjacent to the redundant peak pre-window.

[0083] Step S103: Analyze the preceding gas collection window, the krypton peak time window, the redundant peak pre-window, and the redundant peak post-window to determine the redundant adsorption window and the gas collected by the gasbag.

[0084] Here, the redundant adsorption window refers to a Kr gas silica gel low-temperature adsorption time window with a certain device response time redundancy. The gas collected by the gas bag refers to the gas collected by the gas collection gas bag. Both are determined by the processing terminal through analysis of the preceding gas collection window, the krypton peak time window, the redundant peak pre-window, and the redundant peak post-window. Specific analysis steps are described in [reference needed]. Figure 3 The steps in the process.

[0085] Step S104: Analyze the gas collected by the gasbag and the redundant adsorption window to control the low-temperature adsorption of Kr gas by the preset low-concentration and high-concentration adsorption silica gel.

[0086] Among them, low-concentration adsorption silica gel refers to adsorption silica gel with strong impurity adsorption and krypton capture properties. This adsorption silica gel is used to irreversibly and strongly adsorb impurities through physical adsorption methods such as van der Waals forces and microporous adsorption when the Kr concentration is low, while reversibly and weakly adsorbing Kr gas, thereby achieving rapid impurity removal and increasing the purity of Kr gas when the Kr concentration is low.

[0087] High-concentration adsorption silica gel refers to high-capacity adsorption silica gel that can adsorb a large amount of Kr gas. By adjusting the microporous structure and surface modification, this adsorption silica gel has high Kr selectivity, high adsorption capacity, and low impurity adsorption, and is used to adsorb a large amount of Kr gas when the Kr concentration is high.

[0088] After determining the gas collection chamber and redundant adsorption windows, Kr gas was subjected to low-temperature adsorption using both low-concentration and high-concentration silica gel, thereby improving the purity of the Kr gas collection product. Specific analytical procedures are detailed below. Figure 5 The steps in the process.

[0089] Reference Figure 2 The steps for analyzing the chromatogram to determine the krypton peak time window, the redundant peak pre-window, and the redundant peak post-window include:

[0090] Step S200: Expand the chromatogram according to the preset redundant time period to determine the redundant chromatogram.

[0091] The redundancy time period refers to the redundancy time reserved for the device's response time, which is determined by the operator by combining the response performance of the silica gel low-temperature adsorption device with the purity requirements of Kr gas.

[0092] A redundant chromatogram refers to a redundant krypton peak chromatogram obtained by expanding the chromatogram with a redundant time period. The chromatogram is determined by the processing terminal by expanding the chromatogram left and right according to the redundant time period after determining the chromatogram.

[0093] Step S201: Extract information from redundant chromatograms to determine the highest chromatographic peak.

[0094] Among them, the highest chromatographic peak value refers to the peak value with the highest Kr content in the redundant chromatogram. It is determined by the processing terminal by extracting information from the redundant chromatogram and determining the Kr content value corresponding to the highest point in the peak curve.

[0095] Step S202: Calculate the product of the preset residual peak percentage and the highest chromatographic peak value to determine the residual peak starting point.

[0096] Among them, the residual peak ratio coefficient refers to the ratio of the threshold for dividing the Kr peak value and the peak value after the peak to the highest chromatographic peak value. It is determined by the operator through the analysis of the Kr adsorption performance and impurity adsorption performance of low-concentration and high-concentration adsorbed silica gel, and through low-temperature adsorption experiments of silica gel with different concentrations of Kr gas.

[0097] The residual peak initiation node refers to the starting point of Kr content in the pre-peak and post-peak stages of the redundant chromatogram. It is determined by the processing terminal by calculating the product between the residual peak ratio coefficient and the highest chromatographic peak value.

[0098] Step S203: Extract time from the redundant chromatogram based on the peak start node to determine the redundant peak pre-window, krypton peak time window, and redundant peak post-window.

[0099] The redundant peak front window is consistent with the redundant peak front window in step S101. The processing terminal searches for the residual peak start node before the highest peak position of the redundant chromatogram. The time node corresponding to the residual peak start node before the highest peak is the end time node of the redundant peak front window. The start time node of the redundant chromatogram is the start time node of the redundant peak front window. The redundant peak front window is determined based on the start time node and the end time node.

[0100] The redundant peak back window is the same as the redundant peak back window in step S101. The processing terminal finds the time node corresponding to the peak position of the redundant peak after the peak position of the redundant chromatogram based on the starting node of the redundant peak. The starting time node of the redundant peak after the peak position is the start time node of the redundant peak back window, and the ending time node of the redundant chromatogram is the ending time node of the redundant peak back window. The redundant peak back window is determined based on the starting time node and the ending time node.

[0101] The krypton peak time window is consistent with the krypton peak time window in step S101. After the processing terminal determines the redundant peak pre-window and redundant peak post-window, the time window between the redundant peak pre-window and redundant peak post-window is the krypton peak time window.

[0102] Reference Figure 3 The analysis of the preceding gas collection window, the krypton peak time window, the redundant peak pre-window, and the redundant peak post-window, to determine the redundant adsorption window and the steps for gas collection by the gasbag, includes:

[0103] Step S300: Control the preset gas collection bladder to collect the preset preceding gas according to the preceding time window, so as to determine the gas collected by the bladder.

[0104] Among them, the gas collecting airbag refers to an airbag device used to collect gas within a preceding time window.

[0105] The preceding gas refers to the gas that overflows before the Kr gas begins to overflow after separation by the chromatograph.

[0106] The gas collected by the gasbag is the same as the gas collected by the gasbag in step S103. The processing terminal determines the gas collection by controlling the gas collection gasbag according to the preceding time window. By analyzing the preceding gas, the time window is adjusted to improve the accuracy of Kr gas interception.

[0107] Step S301: Analyze the gas collected by the airbag to determine the concentration of the preceding Kr.

[0108] Among them, the preceding Kr concentration refers to the Kr concentration in the preceding gas, which is determined by the processing terminal by directly acquiring the detection data of the miniature packaged TCD thermal conductivity detection device built into the gas collection bag, providing data support for the subsequent determination of the redundant adsorption window.

[0109] Step S302: Determine whether the preceding Kr concentration is greater than the preset preceding Kr threshold.

[0110] The preceding Kr threshold refers to the maximum Kr concentration in the preceding gas under the condition that the chromatogram results are accurate and no data drift has occurred. This data is determined by the operator by detecting the Kr concentration in the preceding gas under standard data.

[0111] The processing terminal determines whether the concentration of preceding Kr is greater than the preceding Kr threshold, thereby determining whether the chromatogram detection result has shifted. Then, based on the concentration of Kr in the preceding gas, the chromatogram shift is determined, and the redundant adsorption window is adjusted according to the shift to improve the collection efficiency of Kr gas.

[0112] Step S3021: If it is not greater than, then integrate the krypton peak time window, the redundant peak pre-window, and the redundant peak post-window to determine the redundant adsorption window.

[0113] If the processing terminal determines that the concentration of the preceding Kr is not greater than the threshold of the preceding Kr, it indicates that the redundant chromatogram has not experienced data drift and there is no need to adjust the time window. Therefore, the krypton peak time window, the redundant peak pre-window, and the redundant peak post-window are integrated to determine the redundant adsorption window.

[0114] Step S3022: If the concentration is greater than the set value, then control the preset low-concentration adsorption silica gel to perform low-temperature adsorption of Kr gas in the gas collected by the airbag.

[0115] If the processing terminal determines that the concentration of preceding Kr is greater than the threshold of preceding Kr, it indicates that data drift has occurred in the redundant chromatogram and the time window needs to be adjusted. Therefore, low-concentration adsorbent silica gel is used to adsorb Kr gas in the gas collected by the gasbag at low temperature, thereby adsorbing Kr present in the preceding gas, increasing the amount of Kr gas collected, and reducing Kr loss caused by data drift.

[0116] The low-temperature adsorption silica gel is the same as the low-temperature adsorption silica gel in step S104, and is used to adsorb Kr in the preceding gas at low temperature.

[0117] Step S3023: Analyze the preceding Kr concentration, krypton peak time window, redundant peak pre-window, and redundant peak post-window to determine the redundant adsorption window.

[0118] Once data drift is identified in the redundant chromatogram, the preceding Kr concentration, the krypton peak time window, the redundant peak pre-window, and the redundant peak post-window are analyzed to adjust the time window and ultimately determine the redundant adsorption window, thereby reducing the loss of Kr gas.

[0119] Reference Figure 4 The steps for determining the redundant adsorption window include analyzing the preceding Kr concentration, krypton peak time window, redundant peak pre-window, and redundant peak post-window:

[0120] Step S400: Calculate the product of the preceding Kr concentration and the preceding gas collection time to determine the total preceding Kr contribution.

[0121] The preceding total Kr contribution refers to the quantified value of the effective Kr contribution within the preceding gas collection window. Since the Kr in the preceding gas is almost zero under normal conditions, the preceding total Kr contribution comes from the Kr within the pre-peak redundant window, which is determined by the processing terminal by calculating the product of the preceding Kr concentration and the preceding gas collection time.

[0122] Step S401: Perform duration analysis on the redundant peak pre-window to determine the total pre-peak duration.

[0123] Among them, the total duration before the peak refers to the total duration of the redundant window before the peak. It is determined by the processing terminal through analysis of the redundant window before the peak, extracting the end time point and the start time point of the redundant window before the peak, and then calculating the difference between the end time point and the start time point.

[0124] Step S402: Input the total contribution of preceding Kr, the concentration of preceding Kr, and the total pre-peak duration into the preset airbag pre-peak duration model to determine the pre-peak drift duration.

[0125] Among them, the airbag pre-peak duration model refers to the formula model that calculates the proportion of pre-peak duration in the airbag by associating the total contribution of Kr in the preceding time period with the Kr contribution of the pre-peak redundancy segment in the preceding time period, making the total contribution equal to the contribution of the pre-peak redundancy window.

[0126] The peak drift time refers to the proportion of the actual Kr peak drift in the actual gas separation results within the preceding time window. It is calculated by the processing terminal by inputting the total contribution of preceding Kr, the preceding Kr concentration, and the total peak drift time into the airbag peak drift time model. The specific calculation formula is as follows:

[0127] .

[0128] In the formula, For the pre-peak drift time, For the total contribution of the preceding Kr, The total duration before the peak. This represents the preceding Kr concentration.

[0129] Step S403: Based on the pre-peak drift time, shorten the redundant pre-peak window backward, and based on the pre-peak drift time, move the krypton peak time window and the redundant post-peak window forward to determine the drift pre-peak window, the drift krypton peak window, and the drift post-peak window.

[0130] Among them, the drift peak front window refers to the redundant peak front window that has been calibrated by the peak front drift time. Since the actual data of the redundant peak front window overlaps with the preceding gas collection window, the Kr in the overlapping part has been collected by the gas collection bag. There is no need to move the redundant peak front window forward. It is only necessary to shorten the redundant peak front window backward. The processing terminal determines the peak front drift time by shortening the redundant peak front window backward according to the peak front drift time.

[0131] The drift krypton peak window refers to the krypton peak time window calibrated by the pre-peak drift time, which is determined by the processing terminal by moving the entire krypton peak time window forward by the pre-peak drift time.

[0132] The drift peak back window refers to the krypton peak time window calibrated by the peak drift time. It is determined by the processing terminal by moving the redundant peak back window forward by the peak drift time.

[0133] Step S404: Integrate the drift peak front window, drift krypton peak window, and drift peak back window to determine redundant adsorption windows.

[0134] In this process, after determining the drift peak pre-window, drift krypton peak window, and drift peak post-window, the drift peak pre-window, drift krypton peak window, and drift peak post-window are spliced ​​and integrated in chronological order to determine the redundant adsorption window.

[0135] Reference Figure 5 The steps for controlling the low-temperature adsorption of Kr gas by analyzing the gas collected by the gasbag and the redundant adsorption window, and controlling the preset low-concentration and high-concentration adsorption silica gel, include:

[0136] Step S500: Extract data from redundant time windows to determine the pre-peak time window, post-peak time window, and theoretical krypton peak window.

[0137] The pre-peak time window is consistent with the drift pre-peak window in step S403, and is determined by the processing terminal by extracting the time period of the drift pre-peak window in the redundant time window.

[0138] The post-peak time window is consistent with the drift peak post-window in step S403, and is determined by the processing terminal by extracting the time period of the drift peak post-window in the redundant time window.

[0139] The theoretical krypton peak window is consistent with the drift krypton peak window in step S403, and is determined by the processing terminal by extracting time periods from the drift krypton peak bed in the redundant time window.

[0140] Step S501: Obtain the chromatographic carrier gas flow rate.

[0141] Among them, the chromatographic carrier gas flow rate refers to the initial gas flow rate of the gas after separation by the chromatograph and flow to the silica gel low-temperature adsorption device, which is determined by the processing terminal by obtaining the basic flow rate setting parameters of the chromatograph.

[0142] Step S502: Analyze the chromatographic carrier gas flow rate and control the low-concentration adsorption silica gel to perform low-temperature adsorption of Kr gas within the pre-peak time window.

[0143] After determining the chromatographic carrier gas flow rate, the flow rate was analyzed to determine the gas flow rate required for low-temperature silica gel adsorption of the gas within the pre-peak time window. Low-concentration silica gel was controlled to adsorb Kr gas at low temperatures within the pre-peak time window, thereby improving the purity of the Kr gas. Specific analytical steps are described below. Figure 6 The steps in the process.

[0144] Step S503: Calculate the product of the chromatographic carrier gas flow rate and the preset intra-peak flow rate coefficient to determine the krypton peak carrier gas flow rate.

[0145] The peak flow rate coefficient refers to the adjustment coefficient of the gas flow rate when the gas is adsorbed within the theoretical krypton peak window. It is determined by the operator through experiments on the adsorption effect of high-concentration adsorbed silica gel at different chromatographic carrier gas flow rates. After determining the gas flow rate with the best adsorption effect at different chromatographic carrier gas flow rates, the gas flow rate is linearly fitted to the chromatographic carrier gas flow rate.

[0146] The krypton peak carrier gas flow rate refers to the gas flow rate when the gas is subjected to low-temperature Kr adsorption by high-concentration adsorbent silica gel within the theoretical krypton peak window. It is determined by the processing terminal by calculating the product of the chromatographic carrier gas flow rate and the flow rate coefficient within the peak.

[0147] Step S504: Control the flow of Kr gas at the Kr peak carrier gas flow rate within the theoretical Kr peak window, and perform low-temperature adsorption of Kr gas with high-concentration adsorption silica gel.

[0148] In this process, after determining the krypton peak carrier gas flow rate, the Kr gas is controlled to flow at the krypton peak carrier gas flow rate within the theoretical krypton peak window. The Kr gas is then adsorbed at low temperature using high-concentration adsorption silica gel, thereby improving the purity of Kr and reducing Kr loss.

[0149] Step S505: Analyze the chromatographic carrier gas flow rate and control the low-concentration adsorption silica gel to perform low-temperature adsorption of Kr gas within the post-peak time window.

[0150] After determining the post-peak time window, the chromatographic carrier gas flow rate was analyzed. Once the gas flow rate within the post-peak time window was determined, low-concentration silica gel was used to adsorb Kr gas at low temperatures, thereby improving Kr gas purity. Specific analytical steps are detailed below. Figure 7 The steps in the process.

[0151] Reference Figure 6 The steps for analyzing the carrier gas flow rate in chromatography and controlling the low-concentration adsorption silica gel for low-temperature adsorption of Kr gas within the pre-peak time window include:

[0152] Step S600: Obtain the pre-peak Kr concentration.

[0153] Among them, the pre-peak Kr concentration refers to the real-time concentration of Kr within the pre-peak time window, which is determined by the processing terminal by directly acquiring the detection data of the micro TCD thermal conductivity detection device arranged at the low-concentration adsorbed silica gel, providing data support for the subsequent determination of the pre-peak carrier gas flow rate.

[0154] Step S601: Calculate the ratio of the pre-peak Kr concentration to the preset pre-peak concentration threshold to determine the current concentration percentage.

[0155] Among them, the pre-peak concentration threshold is consistent with the residual peak start node in step S202, and is the maximum threshold of Kr concentration within the pre-peak time window.

[0156] The current concentration percentage refers to the proportion of the current Kr concentration in the pre-peak concentration threshold, which is determined by the processing terminal by calculating the ratio of the pre-peak Kr concentration to the pre-peak concentration threshold.

[0157] Step S602: Calculate the product of the preset pre-peak flow rate coefficient and the chromatographic carrier gas flow rate to determine the pre-peak base flow rate.

[0158] The peak flow rate coefficient refers to the chromatographic carrier gas flow rate adjustment coefficient that achieves the best adsorption effect at the threshold concentration of Kr within the peak time window. Operators first obtain the concentration threshold data of Kr for all historical peak time periods, calculate the average value to determine the average peak concentration threshold of Kr, and then set different relative carrier gas flow rate adjustment coefficients based on this average value to conduct experiments. The adjustment coefficient that achieves the best adsorption effect is the peak flow rate coefficient.

[0159] Step S603: Calculate the product of the preset peak deviation coefficient, the chromatographic carrier gas flow rate, and the current concentration percentage to determine the pre-peak adjustment amount.

[0160] The peak deviation coefficient is consistent with the intra-peak flow velocity coefficient in step S503, and is used to adjust the flow velocity according to the linear increasing relationship of Kr concentration.

[0161] The pre-peak adjustment amount refers to the adjustment amount of the carrier gas flow rate based on the pre-peak Kr concentration. It is determined by the processing terminal by calculating the product of the peak deviation coefficient, the chromatographic carrier gas flow rate, and the current concentration. This provides data support for the subsequent determination of the pre-peak carrier gas flow rate, thereby adjusting the carrier gas flow rate according to the real-time Kr concentration and improving the adsorption efficiency of Kr.

[0162] Step S604: Calculate the difference between the pre-peak base velocity and the pre-peak adjustment amount to determine the pre-peak carrier gas velocity.

[0163] Among them, the pre-peak carrier gas flow rate refers to the carrier gas flow rate that matches the Kr concentration within the pre-peak time window, which is determined by the processing terminal by calculating the difference between the pre-peak baseline flow rate and the pre-peak adjustment amount.

[0164] Step S605: Control the preset chromatographic separation gas to flow at the pre-peak carrier gas flow rate, use low-concentration adsorption silica gel to perform low-temperature adsorption of Kr gas, and continuously obtain the pre-peak Kr concentration for cyclic calculation to update the pre-peak carrier gas flow rate in real time.

[0165] In this process, after determining the carrier gas flow rate, the preset chromatographic separation gas is controlled to flow at the pre-peak carrier gas flow rate. Low-concentration adsorption silica gel is used to adsorb Kr gas at low temperature, and the pre-peak Kr concentration is continuously obtained for cyclic calculation to update the pre-peak carrier gas flow rate in real time. Thus, the gas flow rate is adjusted synchronously in real time according to the Kr concentration during the pre-peak time period to improve the purification efficiency of Kr gas.

[0166] Gas separation by chromatography refers to the gas after preliminary separation by a chromatograph.

[0167] Reference Figure 7 The steps for analyzing the carrier gas flow rate in chromatography and controlling the low-concentration adsorption silica gel for low-temperature adsorption of Kr gas within the post-peak time window include:

[0168] Step S700: Obtain the post-peak Kr concentration.

[0169] Among them, the post-peak Kr concentration refers to the real-time concentration of Kr within the post-peak time window, which is determined by the processing terminal by directly acquiring the detection data of the micro TCD thermal conductivity detection device arranged at the low-concentration adsorbed silica gel, providing data support for the subsequent determination of the post-peak carrier gas flow rate.

[0170] Step S701: Determine whether the Kr concentration after the peak is greater than the preset high concentration residual threshold.

[0171] The high-concentration residual threshold refers to the lowest concentration value at which the Kr gas concentration after the peak reaches the high-concentration residual threshold standard. The operator analyzes the adsorption performance of high-concentration and low-concentration adsorbed silica gel to determine the adsorption residue of high-concentration adsorbed silica gel. After determining the basic residue, the operator then determines the situation where high-concentration Kr gas is incorrectly intercepted within the time window after the peak based on the theoretical Kr peak time window interception deviation. Finally, the basic residue threshold is adjusted upward to determine the final high-concentration residual threshold.

[0172] By processing the terminal to determine whether the Kr concentration after the peak is greater than the high concentration residual threshold, it can be determined whether there is a high concentration of Kr gas residue. Then, different carrier gas flow rates can be selected according to the residue situation to reduce Kr collection loss.

[0173] Step S7011: If it is greater than the preset post-peak low flow rate coefficient and the chromatographic carrier gas flow rate, then calculate the product of the preset post-peak low flow rate coefficient and the chromatographic carrier gas flow rate to determine the post-peak carrier gas flow rate.

[0174] If the processing terminal determines that the post-peak Kr concentration is greater than the high-concentration residue threshold, it indicates that there is a high-concentration Kr residue. Therefore, the post-peak low flow rate coefficient is calculated by multiplying it by the chromatographic carrier gas flow rate to determine the post-peak carrier gas flow rate.

[0175] The post-peak low flow rate coefficient refers to the flow rate adjustment coefficient that allows for significant reduction in the flow rate of the chromatographic carrier gas under high concentration residual conditions. This extends the time between the high-concentration gas and the low-concentration adsorption device, reducing Kr escape. The operator controls the flow of high-concentration gas according to different flow rate adjustment coefficients, and the flow rate adjustment coefficient that yields the best adsorption effect is the post-peak low flow rate adjustment coefficient.

[0176] The post-peak carrier gas flow rate refers to the gas flow rate during the time period after the peak. It is determined by the processing terminal by calculating the product of the post-peak low flow rate coefficient and the chromatographic carrier gas flow rate, or by the post-peak high flow rate coefficient in the case of low concentration residue, or by the medium concentration residual flow rate model in the case of medium concentration residue.

[0177] Step S7012: If it is not greater than, then determine whether the Kr concentration after the peak is less than the preset low concentration residual threshold.

[0178] If the processing terminal determines that the Kr concentration after the peak is not greater than the high concentration residual threshold, it indicates that there is no high concentration Kr residual situation at this time. Therefore, it is determined whether the Kr concentration after the peak is less than the low concentration residual threshold, thereby determining whether it is a low concentration residual situation or a medium concentration residual situation. Then, different carrier gas flow rates are determined according to different residual situations to reduce Kr loss.

[0179] The low concentration residual threshold refers to the highest concentration of Kr gas after the peak that reaches the low concentration residual threshold standard. It is determined by the operator through analysis of the adsorption effect of high-concentration adsorption silica gel, to determine the Kr residual amount under ideal adsorption conditions, and then combined with the Kr concentration within the time window after the peak.

[0180] Step S7013: If it is less than, calculate the product of the preset post-peak high flow rate coefficient and the chromatographic carrier gas flow rate to determine the post-peak carrier gas flow rate.

[0181] If the post-peak Kr concentration is determined to be less than the low-concentration residual threshold by the processing terminal, it indicates that the situation is a low-concentration residual situation. Therefore, the product of the post-peak high flow rate coefficient and the chromatographic carrier gas flow rate is calculated to determine the post-peak carrier gas flow rate.

[0182] The post-peak high flow rate coefficient refers to the flow rate adjustment coefficient for making small, low-level adjustments to the chromatographic carrier gas flow rate under low concentration residual conditions. It is determined by the operator through experiments with different flow rate adjustment coefficients under low concentration residual conditions to find the flow rate adjustment coefficient with the best adsorption effect under low concentration conditions, which is the post-peak high flow rate coefficient.

[0183] The post-peak carrier gas flow rate is consistent with the post-peak carrier gas flow rate in step S7011, and is determined by the processing terminal by calculating the product of the post-peak high flow rate coefficient and the chromatographic carrier gas flow rate.

[0184] Step S7014: If not less than, input the post-peak high flow rate coefficient, post-peak low flow rate coefficient, chromatographic carrier gas flow rate, high concentration residual threshold, low concentration residual threshold and post-peak Kr concentration into the preset medium concentration residual flow rate model to determine the post-peak carrier gas flow rate.

[0185] If the processing terminal determines that the post-peak Kr concentration is not less than the low-concentration residual threshold, it indicates that the condition is a medium-concentration residual condition. Therefore, the post-peak high flow rate coefficient, post-peak low flow rate coefficient, chromatographic carrier gas flow rate, high-concentration residual threshold, low-concentration residual threshold, and post-peak Kr concentration are input into the medium-concentration residual flow rate model to determine the post-peak carrier gas flow rate.

[0186] The medium-concentration residual flow rate model refers to a model that analyzes the post-peak Kr concentration under medium-concentration residual conditions within the post-peak time window and generates a matching post-peak carrier flow rate.

[0187] The post-peak carrier gas flow rate is consistent with the post-peak carrier gas flow rate in step S7011. It is determined by the processing terminal by inputting the post-peak high flow rate coefficient, post-peak low flow rate coefficient, chromatographic carrier gas flow rate, high concentration residual threshold, low concentration residual threshold, and post-peak Kr concentration into the medium concentration residual flow rate model. The specific calculation formula is as follows:

[0188] .

[0189] In the formula, The post-peak carrier gas velocity, The coefficient for low velocity after the peak. The chromatographic carrier gas flow rate, This represents the high velocity coefficient after the peak. For high concentration residual threshold, The concentration of Kr after the peak. This represents the low concentration residual threshold.

[0190] Step S7015: Control the preset chromatographic separation gas to flow at the post-peak carrier gas flow rate, use low-concentration adsorption silica gel to perform low-temperature adsorption of Kr gas, and continuously obtain the post-peak Kr concentration for cyclic calculation to update the post-peak carrier gas flow rate in real time.

[0191] In this process, after determining the post-peak carrier gas flow rate, the preset chromatographic separation gas is controlled to flow at the post-peak carrier gas flow rate. Low-concentration adsorption silica gel is used to adsorb Kr gas at low temperature, and the post-peak Kr concentration is continuously obtained for cyclic calculation to update the post-peak carrier gas flow rate in real time. Thus, the carrier gas flow rate is determined in real time based on the Kr concentration to reduce Kr loss.

[0192] The gas separated by chromatography is the same as the gas separated by chromatography in step S605, which refers to the gas after preliminary separation by the chromatograph.

[0193] Based on the same inventive concept, embodiments of this application provide a Kr collection system based on low-temperature adsorption of silica gel, comprising:

[0194] The acquisition module is used to acquire chromatographic separation chromatograms, chromatographic carrier gas flow rates, pre-peak Kr concentrations, and post-peak Kr concentrations.

[0195] A memory for storing the program of the Kr collection method based on low-temperature adsorption of silica gel;

[0196] The processor and memory can load and execute the program to implement the Kr collection method based on low-temperature adsorption of silica gel.

[0197] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0198] This application provides a computer-readable storage medium storing a computer program that can be loaded by a processor and executed as a Kr collection method based on low-temperature adsorption of silica gel.

[0199] Computer storage media include, for example, USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, optical disks, and other media that can store program code.

[0200] Based on the same inventive concept, embodiments of this application provide a smart terminal, including a memory and a processor, wherein the memory stores a computer program that can be loaded and executed by the processor to collect Kr based on low-temperature adsorption of silica gel.

[0201] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0202] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any feature disclosed in this specification (including the abstract and drawings) may be replaced by other equivalent or similar features unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is only one example of a series of equivalent or similar features.

Claims

1. A method for collecting Kr based on low-temperature adsorption of silica gel, characterized in that, include: Obtain the chromatogram; Analyze the chromatograms to determine the krypton peak time window, the redundant peak front window, and the redundant peak back window; A preceding gas collection window is set before the redundant peak window according to the preset preceding gas collection time. The gas is collected by the preset gas collection bladder according to the preceding time window to determine the gas to be collected by the bladder. The gas collected by the airbag was analyzed to determine the preceding Kr concentration; Determine whether the preceding Kr concentration is greater than a preset preceding Kr threshold; If it is not greater than, the krypton peak time window, redundant peak pre-window and redundant peak post-window are integrated to determine the redundant adsorption window; If the concentration is greater than the preset low-concentration adsorption silica gel, the Kr gas in the gas collected by the airbag will be adsorbed at low temperature. Low-concentration adsorption silica gel refers to adsorption silica gel with strong impurity adsorption and krypton capture properties. This adsorption silica gel is used for reversible weak adsorption of Kr gas when the Kr concentration is low. Calculate the product of the preceding Kr concentration and the preceding gas collection time to determine the total preceding Kr contribution; Perform duration analysis on redundant peak-front windows to determine the total peak-front duration; The total contribution of the preceding Kr Precursor Kr concentration Total duration before the peak Input into the preset airbag pre-peak duration model to determine the pre-peak drift duration. The pre-peak duration model for the airbag is as follows: ； The redundant peak-before window is truncated backward based on the peak-before drift time, and the krypton peak time window and the redundant peak-after window are moved forward based on the peak-before drift time to determine the drift peak-before window, the drift krypton peak window, and the drift peak-after window. The drift peak front window, drift krypton peak window, and drift peak back window are integrated to determine the redundant adsorption window; Redundant adsorption window refers to a Kr gas silica gel low-temperature adsorption time window with a certain device response time redundancy. Data is extracted from redundant time windows to determine the pre-peak time window, post-peak time window, and theoretical krypton peak window; Obtain the chromatographic carrier gas flow rate; The chromatographic carrier gas flow rate was analyzed, and low-concentration adsorbed silica gel was controlled to perform low-temperature adsorption of Kr gas within the pre-peak time window. Calculate the product of the chromatographic carrier gas flow rate and the preset intra-peak flow rate coefficient to determine the krypton peak carrier gas flow rate; The in-peak flow rate coefficient refers to the adjustment coefficient of the gas flow rate when the gas is adsorbed within the theoretical krypton peak window. It is determined by linearly fitting the gas flow rate and the chromatographic carrier gas flow rate after determining the gas flow rate with the best adsorption effect under different chromatographic carrier gas flow rates. Kr gas was controlled to flow at the kr peak carrier gas flow rate within the theoretical kr peak window, and Kr gas was adsorbed at low temperature using high-concentration adsorption silica gel. High-concentration adsorption silica gel refers to high-capacity adsorption silica gel that can adsorb a large amount of Kr gas. It is used to adsorb a large amount of Kr gas when the Kr concentration is high. The chromatographic carrier gas flow rate was analyzed, and low-concentration adsorbed silica gel was controlled to perform low-temperature adsorption of Kr gas within the post-peak time window.

2. The method for collecting Kr based on low-temperature adsorption of silica gel according to claim 1, characterized in that, The steps for analyzing the chromatogram to determine the krypton peak time window, the redundant peak front window, and the redundant peak back window include: The chromatogram is expanded according to a preset redundant time period to identify redundant chromatograms; Information is extracted from redundant chromatograms to determine the highest chromatographic peak. Calculate the product of the preset residual peak percentage and the highest chromatographic peak value to determine the residual peak initiation point; The redundant chromatogram is truncated based on the starting node of the residual peak to determine the pre-window, time window, and post-window of the redundant peak.

3. The method for collecting Kr based on low-temperature adsorption of silica gel according to claim 1, characterized in that, The steps for analyzing the carrier gas flow rate in chromatography and controlling the low-concentration adsorption silica gel for low-temperature adsorption of Kr gas within the pre-peak time window include: Obtain the pre-peak Kr concentration; Calculate the ratio of the pre-peak Kr concentration to the preset pre-peak concentration threshold to determine the current concentration percentage; Calculate the product of the preset pre-peak flow rate coefficient and the chromatographic carrier gas flow rate to determine the pre-peak base flow rate; The pre-peak flow rate coefficient refers to the chromatographic carrier gas flow rate adjustment coefficient that achieves the best adsorption effect at the threshold concentration of Kr within the pre-peak time window. Calculate the product of the preset peak deviation coefficient, the chromatographic carrier gas flow rate, and the current concentration percentage to determine the pre-peak adjustment amount; The peak deviation coefficient is an adjustment coefficient for gas flow rate, used to adjust the chromatographic carrier gas flow rate according to the linear increasing relationship of Kr concentration; Calculate the difference between the pre-peak base velocity and the pre-peak adjustment amount to determine the pre-peak carrier gas velocity; The preset chromatographic separation gas is controlled to flow at the pre-peak carrier gas flow rate, and Kr gas is adsorbed at low temperature with low-concentration adsorption silica gel. The pre-peak Kr concentration is continuously obtained and cyclically calculated to update the pre-peak carrier gas flow rate in real time.

4. The method for collecting Kr based on low-temperature adsorption of silica gel according to claim 1, characterized in that, The steps for analyzing the carrier gas flow rate in chromatography and controlling the low-concentration adsorption silica gel for low-temperature adsorption of Kr gas within the post-peak time window include: Obtain the Kr concentration after the peak; Determine whether the post-peak Kr concentration is greater than the preset high-concentration residual threshold; If it is greater than that, calculate the product of the preset post-peak low flow rate coefficient and the chromatographic carrier gas flow rate to determine the post-peak carrier gas flow rate. The post-peak low flow rate coefficient refers to the rate adjustment coefficient that allows for significant low-rate adjustments to the chromatographic carrier gas flow under high concentration residual conditions. If it is not greater than, then determine whether the Kr concentration after the peak is less than the preset low concentration residual threshold. If it is less than, calculate the product of the preset post-peak high flow rate coefficient and the chromatographic carrier gas flow rate to determine the post-peak carrier gas flow rate; The post-peak high flow rate coefficient refers to the rate adjustment coefficient for making small, low-rate adjustments to the chromatographic carrier gas flow rate under low concentration residual conditions. If it is not less than, then the post-peak high velocity coefficient will be... Post-peak low velocity coefficient chromatographic carrier gas flow rate High concentration residual threshold Low concentration residual threshold and peak Kr concentration Input into the preset medium-concentration residual flow rate model to determine the post-peak carrier gas flow rate. The medium-concentration residual flow rate model is as follows: ； The preset chromatographic separation gas is controlled to flow at the post-peak carrier gas flow rate. Low-concentration adsorption silica gel is used to adsorb Kr gas at low temperature, and the post-peak Kr concentration is continuously obtained for cyclic calculation to update the post-peak carrier gas flow rate in real time.

5. A Kr collection system based on low-temperature adsorption of silica gel, characterized in that, include: The acquisition module is used to acquire chromatographic separation patterns; A memory for storing the program of the Kr collection method based on low-temperature adsorption of silica gel as described in any one of claims 1 to 4; The processor and the program in the memory are capable of being loaded and executed by the processor to implement the Kr collection method based on low-temperature adsorption of silica gel as described in any one of claims 1 to 4.

6. A smart terminal, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed as described in any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that, The computer program is stored that can be loaded by a processor and executed as described in any one of claims 1 to 4, for the collection of Kr based on low-temperature adsorption of silica gel.

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