CN-121613030-B - Kr collecting method, system, terminal and storage medium based on silica gel low-temperature adsorption

CN121613030BCN 121613030 BCN121613030 BCN 121613030BCN-121613030-B

Abstract

The application relates to a Kr collecting method, a system, a terminal and a storage medium based on silica gel low-temperature adsorption, which relate to the technical field of Kr gas collection and comprise the steps of obtaining a chromatographic separation diagram; 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 front gas window in front of the redundant peak front window according to the preset front gas collecting time, analyzing the front gas window, the krypton peak time window, the redundant peak front window and the redundant peak rear window to determine redundant adsorption windows and gas bag collected gas, and analyzing the gas bag collected gas and the redundant adsorption windows to control the preset low-concentration adsorption silica gel and high-concentration adsorption silica gel to adsorb the Kr gas at low temperature. The application has the effect of improving the purity of the collected product of the Kr gas.

Inventors

Sheng Yewei
Fu Chenjiang
LI HAI
WU DAN
LIU LANG
YU WANLI

Assignees

杭州湘亭科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260130

Claims (7)

1. A Kr collection method based on silica gel low temperature adsorption, comprising: Obtaining a chromatographic separation chart; 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 preamble gas collection window in front of a redundant peak front window according to the preset preamble gas collection time; Controlling a preset gas collecting air bag to collect preset precursor gas according to the precursor time window so as to determine air bag collecting gas; analyzing the airbag collected gas to determine a preamble Kr concentration; judging whether the concentration of the preamble Kr is larger than a preset preamble Kr threshold value or not; if not, integrating the krypton peak time window, the redundant peak front window and the redundant peak rear window to determine a redundant adsorption window; If the ratio is greater than the ratio, controlling the preset low-concentration adsorption silica gel to adsorb the Kr gas in the gas bag collecting gas at a low temperature; The low-concentration adsorption silica gel is adsorption silica gel having strong impurity adsorption and krypton capturing property, and is used for carrying out reversible weak adsorption on the Kr gas when the Kr concentration is low; Calculating the product of the concentration of the preamble Kr and the preamble gas collection time to determine the preamble total Kr contribution; performing time length analysis on the redundant peak front window to determine total time length before the peak; Total contribution of preamble Kr Concentration of Kr in preamble Sum of the total time before peak Inputting into a preset air bag pre-peak time length model to determine the pre-peak drift time length The air bag pre-peak duration model is as follows: ; The front window of the redundant peak is truncated backwards according to the pre-peak drift time, and the krypton peak time window and the rear window of the redundant peak are moved forwards according to the pre-peak drift time so as to determine the front window of the drifting peak, the drifting krypton peak window and the rear window of the drifting peak; Integrating the front drifting peak window, the drifting krypton peak window and the rear drifting peak window to determine a redundant adsorption window; The redundant adsorption window is a Kr gas silica gel low-temperature adsorption time window provided with a certain device response time redundancy; Extracting data from the redundant time window to determine a pre-peak time window, a post-peak time window and a theoretical krypton peak window; Obtaining a chromatographic carrier gas flow rate; Analyzing the flow rate of the chromatographic carrier gas, and controlling the low-concentration adsorption silica gel to adsorb the Kr gas at low temperature in a pre-peak time window; Calculating the product of the chromatographic carrier gas flow rate and a preset peak flow rate coefficient to determine the krypton peak carrier gas flow rate; the peak inner flow rate coefficient refers to the adjustment coefficient of the gas flow rate when the gas is adsorbed in the theoretical krypton peak window, and is determined by linear fitting of 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; Controlling the Kr gas to flow at the flow rate of the krypton peak carrier gas in a theoretical krypton peak window, and carrying out low-temperature adsorption on the Kr gas by using high-concentration adsorption silica gel; the high-concentration adsorption silica gel means a high-capacity adsorption silica gel capable of adsorbing a large amount of Kr gas, for adsorbing a large amount of Kr gas when the Kr concentration is high; Analyzing the flow rate of the chromatographic carrier gas, and controlling the low-concentration adsorption silica gel to adsorb the Kr gas at low temperature in a post-peak time window.
2. The Kr collection method based on silica gel cryoadsorption according to claim 1, wherein the step of analyzing the chromatographic separation map to determine a krypton peak time window, a redundant peak front window, and a redundant peak rear window comprises: expanding the chromatographic analysis chart according to a preset redundancy time period to determine a redundancy chromatographic chart; extracting information from the redundant chromatograms to determine the highest chromatographic peak value; calculating the product of a preset Yu Feng duty cycle value and the highest chromatographic peak value to determine a Yu Feng starting node; and performing time interception on the redundant chromatogram according to the Yu Feng starting node to determine a redundant peak front window, a krypton peak time window and a redundant peak rear window.
3. The Kr collection method based on low-temperature adsorption of silica gel according to claim 1, wherein the step of analyzing the flow rate of the chromatographic carrier gas and controlling the low-temperature adsorption of Kr gas by the low-concentration adsorption silica gel in the pre-peak time window comprises: Acquiring the pre-peak Kr concentration; Calculating the ratio of the pre-peak Kr concentration to a preset pre-peak concentration threshold value to determine the current concentration duty ratio; calculating the product of a preset pre-peak flow velocity coefficient and the chromatographic carrier gas flow velocity to determine a pre-peak basic flow velocity; The pre-peak flow velocity coefficient refers to a chromatographic carrier gas flow velocity adjustment coefficient with the best adsorption effect under the threshold concentration of Kr in a pre-peak time window; calculating the product of a preset deviation coefficient in a peak, the flow rate of chromatographic carrier gas and the current concentration ratio to determine the pre-peak adjustment quantity; The in-peak deviation coefficient refers to an adjustment coefficient of the gas flow rate, and is used for adjusting the chromatographic carrier gas flow rate according to the linear increasing relation of the Kr concentration; calculating the difference between the pre-peak base flow rate and the pre-peak adjustment to determine the pre-peak carrier gas flow rate; Controlling the preset chromatographic separation gas to flow at the pre-peak carrier gas flow rate, performing low-temperature adsorption on the Kr gas by using low-concentration adsorption silica gel, and continuously acquiring the pre-peak Kr concentration for cyclic calculation so as to update the pre-peak carrier gas flow rate in real time.
4. The Kr collection method based on low-temperature adsorption of silica gel according to claim 1, wherein the step of analyzing the flow rate of the chromatographic carrier gas and controlling the low-temperature adsorption of Kr gas by the low-concentration adsorption silica gel in the post-peak time window comprises: Obtaining the Kr concentration after peak; Judging whether the Kr concentration after the peak is greater than a preset high concentration residual threshold value; if the flow rate is larger than the preset flow rate value, calculating the product of the preset low flow rate coefficient after the peak and the chromatographic carrier gas flow rate to determine the carrier gas flow rate after the peak; the low flow rate coefficient after peak refers to a speed adjustment coefficient which remains at high concentration and performs large low flow rate adjustment on the flow rate of chromatographic carrier gas; if the concentration of the Kr after the peak is not more than the preset low concentration residual threshold value, judging whether the Kr concentration after the peak is less than the preset low concentration residual threshold value; if the flow rate is smaller than the preset flow rate value, calculating the product of the preset high flow rate coefficient after the peak and the chromatographic carrier gas flow rate to determine the carrier gas flow rate after the peak; The high flow rate coefficient after peak refers to a speed adjustment coefficient which remains at low concentration and performs small low flow rate adjustment on the flow rate of chromatographic carrier gas; If not less than, the flow velocity coefficient is high after the peak Low flow rate coefficient after peak Flow rate of chromatographic carrier gas High concentration residual threshold Low concentration residual threshold And Kr concentration after peak Inputting into a preset middle concentration residual flow velocity model to determine the carrier gas flow velocity after peak The medium concentration residual flow rate model is as follows: ; and controlling the preset chromatographic separation gas to flow at the carrier gas flow rate after the peak, performing low-temperature adsorption on the Kr gas by using low-concentration adsorption silica gel, continuously acquiring the Kr concentration after the peak, and performing cyclic calculation to update the carrier gas flow rate after the peak in real time.
5. Kr collecting system based on silica gel cryoadsorption, characterized by comprising: the acquisition module is used for acquiring a chromatographic separation chart; a memory for storing a program of the Kr collection method based on silica gel cryoadsorption according to any one of claims 1 to 4; A processor, a program in a memory capable of being loaded and executed by the processor and implementing the Kr collection method based on silica gel cryoadsorption as claimed in any one of claims 1 to 4.
6. An intelligent terminal, characterized by comprising a memory and a processor, wherein the memory stores a computer program capable of being loaded by the processor and executing the Kr collection method based on silica gel cryoadsorption as claimed in any one of claims 1 to 4.
7. A computer-readable storage medium, characterized in that a computer program capable of being loaded by a processor and executing the Kr collection method based on silica gel cryoadsorption as recited in any one of claims 1 to 4 is stored.

Description

Kr collecting method, system, terminal and storage medium based on silica gel low-temperature adsorption Technical Field The application relates to the technical field of Kr gas collection, in particular to a Kr collection method, a Kr collection system, a Kr terminal and a Kr storage medium based on silica gel low-temperature adsorption. Background Kr collection based on silica gel low temperature adsorption refers to the collection of krypton by adsorption with silica gel cooled to liquid nitrogen temperature by intercepting krypton fraction according to the krypton peak time window given by the preparative chromatographic separation method. In the related art, when the Kr is subjected to silica gel low-temperature adsorption, firstly, a chromatogram of a precursor gas is analyzed, a krypton peak time window is determined, a certain redundancy is added before and after the krypton peak time window, finally, a complete adsorption time window for adsorbing the Kr is determined, and after the adsorption time window is determined, a carrier gas flow is controlled to flow through a silica gel low-temperature adsorption device at a fixed flow rate, so that the collection of the Kr gas is realized. For the related art, when the Kr gas is subjected to the low-temperature adsorption according to the adsorption time window, because the adsorption time window is a fixed time interval generated based on the chromatogram, the situation that the chromatogram shows the result drift may occur, so that the adsorption time window can intercept the krypton peak erroneously, and meanwhile, in the adsorption time window, the situation that the impurity content in the adsorbed Kr gas is too high due to the existence of a time period with low concentration of the redundant adsorption time and the Kr gas, the Kr gas purity of the low-temperature adsorption of the silica gel is low, and the improvement is still in existence. Disclosure of Invention In order to improve the purity of the collected product of the Kr gas, the application provides a Kr collecting method, a system, a terminal and a storage medium based on silica gel low-temperature adsorption. In a first aspect, the application provides a Kr collection method based on silica gel low-temperature adsorption, which adopts the following technical scheme: A Kr collection method based on silica gel low temperature adsorption, comprising: Obtaining a chromatographic separation chart; 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 preamble gas collection window in front of a redundant peak front window according to the preset preamble gas collection time; Analyzing the preamble gas 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 collecting gas; analyzing the gas collected by the air bag and the redundant adsorption window to control the preset low-concentration adsorption silica gel and high-concentration adsorption silica gel to adsorb the Kr gas at low temperature. Optionally, the step of analyzing the chromatographic separation map to determine a krypton peak time window, a redundant peak front window, and a redundant peak rear window includes: expanding the chromatographic analysis chart according to a preset redundancy time period to determine a redundancy chromatographic chart; extracting information from the redundant chromatograms to determine the highest chromatographic peak value; calculating the product of a preset Yu Feng duty cycle value and the highest chromatographic peak value to determine a Yu Feng starting node; and performing time interception on the redundant chromatogram according to the Yu Feng starting node to determine a redundant peak front window, a krypton peak time window and a redundant peak rear window. Optionally, the step of analyzing the preamble set louver, the krypton peak time window, the redundancy peak front window, and the redundancy peak rear window to determine the redundancy adsorption window and the gas-bag collected gas comprises: Controlling a preset gas collecting air bag to collect preset precursor gas according to the precursor time window so as to determine air bag collecting gas; analyzing the airbag collected gas to determine a preamble Kr concentration; judging whether the concentration of the preamble Kr is larger than a preset preamble Kr threshold value or not; if not, integrating the krypton peak time window, the redundant peak front window and the redundant peak rear window to determine a redundant adsorption window; If the ratio is greater than the ratio, controlling the preset low-concentration adsorption silica gel to adsorb the Kr gas in the gas bag collecting gas at a low temperature; The preamble Kr concentration, krypton peak time window, redundant peak front window, and redundant peak rea