Crude helium storage and recycling system for cryogenic helium extraction process and recycling control method

Abstract

The invention provides a crude helium storage and recycling system for a cryogenic helium extraction process and a recycling control method, and relates to the technical field of helium production. The crude helium storage and recycling system for the cryogenic helium extraction process comprises a membrane separation device, a permeable gas supercharging device, a pressure swing adsorption device, a low-temperature adsorption device, a first storage tank group, an unloading device, a second storage tank group, a first detection unit, a second detection unit, a first recycling loop, a second recycling loop, a third recycling loop and a control device. According to the technical scheme, the first detection unit is arranged to monitor the concentration of methane and carbon dioxide in the crude helium at the outlet of the pressure swing adsorption device, high-concentration impurities can be effectively prevented from entering the low-temperature adsorption device, the problem of equipment freezing and blocking caused by condensation is avoided, the crude helium recycling path is dynamically adjusted, and the recycling efficiency of the crude helium is improved. And the gas meeting the standard is sent to the next stage for treatment, so that the helium quality and the production efficiency can be improved in the cryogenic helium extraction process.

Description

Technical Field

[0001] The present application relates to the technical field of helium production, and in particular to a crude helium storage and recycling system and a recycling control method for a deep-cold helium extraction process. Background Art

[0002] Cryogenic helium extraction utilizes the critical temperature differences between natural gas components to separate helium. This technology extracts helium from natural gas through cryogenic processing, resulting in high product purity and yield, along with excellent system reliability and stability. It is currently the most widely used helium extraction method, with approximately 90% of helium extracted using cryogenic methods. In existing helium production processes, qualified crude helium is transported to the dehydrogenation and dehydration skid for purification.

[0003] However, crude helium may contain extremely high levels of methane, carbon dioxide, and Ne gas, and the dehydrogenation and dehydration skid is not capable of handling these extremely high levels of impurity gases. If it is directly purified by the dehydrogenation and dehydration skid, gases such as methane and carbon dioxide will be mixed into the helium, resulting in unqualified refined helium. Therefore, the existing technology generally requires that the crude helium gas should first enter a low-temperature adsorption device, using the selective adsorption of gas molecules by the adsorbent in a low-temperature environment to achieve preliminary purification, concentration, or drying of the gas. However, since the saturated vapor pressure of carbon dioxide and methane will drop sharply in a low-temperature environment, if the carbon dioxide and methane content at the inlet of the low-temperature adsorption device is high, these gases will easily reach saturation and condense under the low-temperature conditions of the low-temperature adsorption device, forming liquid or even solid substances. The channels and adsorbent pores in the low-temperature adsorption device are relatively narrow, and these condensed substances are easy to adhere to the inner wall of the device and the surface of the adsorbent, gradually accumulating and blocking the channels and pores, eventually leading to the occurrence of freeze-blocking, which seriously affects the normal operation of the low-temperature adsorption device and the purification efficiency of helium.

[0004] Therefore, a crude helium storage and recycling system for a cryogenic helium extraction process is needed to at least solve the above problems. Summary of the Invention

[0005] The purpose of the embodiments of the present application is to provide a crude helium storage and refining system for a cryogenic helium extraction process, so as to solve the problem that in the existing crude helium purification system of the cryogenic helium extraction process, the crude helium has high carbon dioxide and methane contents, and is easily frozen and blocked when it directly enters the low-temperature adsorption device, thereby leading to low crude helium purification efficiency.

[0006] To solve the above technical problems, the embodiments of the present application provide the following technical solutions: The present application provides a crude helium storage and recycling system for a cryogenic helium extraction process, comprising: A membrane separation device, a permeate gas pressurizing device, a pressure swing adsorption device, a cryogenic adsorption device and a first storage tank group connected in sequence; an unloading device, wherein the unloading device and the low-temperature adsorption device are both connected to the outlet of the pressure swing adsorption device; a second storage tank group, wherein the inlet of the second storage tank group is connected to the unloading device; a first detection unit, the first detection unit being arranged at the outlet of the pressure swing adsorption device and being used to detect the concentrations of methane and carbon dioxide in the crude helium; A second detection unit is provided at the outlet of the second storage tank group, and is used to detect the pressure of the crude helium gas and the Ne gas concentration; a first recycling circuit, the first recycling circuit connecting the outlet of the second storage tank group and the inlet of the pressure swing adsorption device; a second recycling circuit, the second recycling circuit connecting the outlet of the second storage tank group and the inlet of the permeate gas pressurizing device; a third recycling loop, the third recycling loop connecting the outlet of the second storage tank group and the inlet of the membrane separation device; a control device, the control device being in communication with the first detection unit, the control device being configured to control the crude helium gas to enter the cryogenic adsorption device or the unloading device based on a detection result of the first detection unit; wherein, if the first detection unit detects that the methane concentration in the crude helium gas reaches a first concentration threshold, and / or the carbon dioxide concentration reaches a second concentration threshold, the control device controls the crude helium gas to enter the unloading device; The control device is communicatively connected to the second detection unit, and is used to control the crude helium gas to enter one of the first recycling circuit, the first recycling circuit, and the second recycling circuit according to the detection result of the second detection unit; wherein, the control device determines whether the Ne gas concentration in the crude helium gas reaches a third concentration threshold value, and if so, the control device controls the crude helium gas in the second storage tank group to enter the third recycling circuit; if not, the control device further determines whether the crude helium gas pressure is lower than a first pressure threshold value, and if so, the control device controls the crude helium gas in the second storage tank group to enter the second recycling circuit.

[0007] In some embodiments of the present application, the crude helium storage and recycling system for the cryogenic helium extraction process further includes: a third detection unit, connected to the pressure swing adsorption device, and configured to detect the pressure inside the pressure swing adsorption device; The control device is in communication with the third detection unit, and the pressure value inside the pressure swing adsorption device detected by the third detection unit serves as the first pressure threshold.

[0008] In some embodiments of the present application, the pressure swing adsorption device has a plurality of adsorption towers, the plurality of adsorption towers are arranged in parallel, and the third detection unit detects the pressure value in each of the adsorption towers respectively; The first recycling circuit is connected to the plurality of adsorption towers respectively, and the control device controls the crude helium gas to enter one of the adsorption towers via the first recycling circuit according to the pressure result detected by the third detection unit; The lowest pressure value among the plurality of adsorption towers detected by the third detection unit is used as the first pressure threshold.

[0009] In some embodiments of the present application, the permeate gas pressurizing device is respectively connected to multiple adsorption towers, and the permeate gas pressurizing device is communicatively connected to the control device. The permeate gas pressurizing device is a multi-stage booster pump structure, and the control device controls the pressurization ratio of the permeate gas pressurizing device according to the first pressure threshold.

[0010] In some embodiments of the present application, the crude helium storage and recycling system for the cryogenic helium extraction process further includes: a first pipeline comprising a first main line and a pair of first branch lines, wherein one end of the first main line is connected to the pressure swing adsorption device, and the other end is connected to a pair of first branch lines, wherein the pair of first branch lines are respectively connected to the low-temperature adsorption device and the unloading device, and the first detection unit is disposed on the first main line; A first flow control valve is provided on a pair of the first branch pipelines respectively. The first flow control valve is communicatively connected with the control device. The control device controls the on and off of the first flow control valve according to the detection result of the first detection unit.

[0011] In some embodiments of the present application, the crude helium storage and recycling system for the cryogenic helium extraction process further includes: a second pipeline comprising a second main line and three second branch lines, wherein one end of the second main line is connected to the outlet of the second storage tank group, and the other end is simultaneously connected to the three second branch lines, the three second branch lines being respectively connected to the membrane separation device, the permeate gas pressurizing device, and the pressure swing adsorption device, and the second detection unit is disposed on the second main line; A second flow control valve is provided on each of the second branch pipelines, and the second flow control valve is communicatively connected to the control device, and the control device controls the on and off of the second flow control valve according to the detection result of the second detection unit.

[0012] In some embodiments of the present application, a crude helium storage and recycling system for a cryogenic helium extraction process further includes: A recovery device is connected to the membrane separation device and is used to recover the Ne gas separated by the membrane separation device.

[0013] The present application also provides a recycling control method for the above-mentioned crude helium storage and recycling system for the cryogenic helium extraction process, comprising: Setting a first concentration threshold, a second concentration threshold, a third concentration threshold, and a first pressure threshold; Acquire methane and carbon dioxide concentration data in the crude helium gas at the outlet of the pressure swing adsorption device, and pressure data and Ne gas concentration data of the crude helium gas at the outlet of the second storage tank group; comparing the methane concentration data with the first concentration threshold, and comparing the carbon dioxide concentration data with the second concentration threshold; Determine whether the methane concentration data is greater than the first concentration threshold, and whether the carbon dioxide concentration data is greater than the second concentration threshold; If at least one of the judgment results is yes, the crude helium is controlled to enter the unloading device, otherwise it enters the low-temperature adsorption device; Comparing the Ne gas concentration data with the second concentration threshold to determine whether the Ne gas concentration data is greater than the third concentration threshold, and if so, controlling the crude helium gas to enter the membrane separation device, and then controlling the crude helium gas separated by the membrane separation device to enter the permeate gas boosting device and the pressure swing adsorption device in sequence; Otherwise, the pressure data is compared with the first pressure threshold to determine whether the pressure data is greater than the first pressure threshold. If so, the crude helium is controlled to enter the pressure swing adsorption device; if so, the crude helium is controlled to enter the permeate boosting device and the pressure swing adsorption device in sequence.

[0014] The present application also provides a computer device, comprising a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the above method.

[0015] The present application also provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of the above method when executed by a processor.

[0016] The present application also provides a computer program product, comprising a computer program, which implements the steps of the above method when executed by a processor.

[0017] Compared with the existing technology, the crude helium storage and refining system for the cryogenic helium extraction process provided in the embodiment of the present application can effectively prevent high-concentration impurities from entering the low-temperature adsorption device by setting a first detection unit to monitor the concentrations of methane and carbon dioxide in the crude helium at the outlet of the pressure swing adsorption device, thereby avoiding the problem of equipment freezing and blockage due to condensation. The second detection unit is located at the outlet of the second storage tank group and is used to further monitor the Ne gas concentration and pressure. Based on these parameters, the control system can dynamically adjust the crude helium refining path to ensure that only gas that meets the standards will be sent to the next stage of processing. This significantly improves the quality of the crude helium, reduces the processing pressure for the subsequent production of refined helium, and helps to improve the quality and production efficiency of helium in the cryogenic helium extraction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the exemplary embodiments of the present application will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein: Figure 1 The schematic diagram of the structure of the crude helium storage and recycling system for the cryogenic helium extraction process according to an embodiment of the present application is shown; Figure 2 The flowchart of the recycling control method according to the embodiment of the present application is schematically shown.

[0019] Description of Figure Numbers: 1. Membrane separation device; 2. Permeate gas booster device; 3. Pressure swing adsorption device; 301. Adsorption tower; 4. Cryogenic adsorption device; 5. First storage tank group; 6. Unloading device; 7. Second storage tank group; 8. First detection unit; 9. Second detection unit; 10. First recycling circuit; 11. Second recycling circuit; 12. Third recycling circuit; 13. First flow control valve; 14. Second flow control valve. DETAILED DESCRIPTION

[0020] The following describes exemplary embodiments of the present application in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Instead, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0021] It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this application belongs.

[0022] During the helium extraction process from natural gas, the raw gas undergoes a series of pretreatment steps before being adsorbed on a pressure swing adsorption (PSA) skid to produce crude helium. Qualified crude helium is then transported to the dehydrogenation and dehydration skid for further purification. However, the impurity content of crude helium fluctuates significantly, including methane, carbon dioxide, and neon. Since the dehydrogenation and dehydration skids are not equipped to handle these high levels of impurities, if untreated crude helium is allowed to enter the skids for purification, impurities like methane and carbon dioxide will be mixed into the helium, ultimately resulting in substandard refined helium.

[0023] In the prior art, cryogenic adsorption devices are usually used to adsorb small amounts of methane and carbon dioxide in crude helium. However, the saturated vapor pressure of carbon dioxide and methane will drop sharply in a low-temperature environment. Once the carbon dioxide and methane content at the inlet of the cryogenic adsorption device exceeds the limit that the device can handle, under the low-temperature conditions of the cryogenic adsorption device, these gases will easily reach a saturated state and condense, thereby forming liquid or even solid substances. The channels and adsorbent pores inside the cryogenic adsorption device are relatively narrow, and the condensed substances can easily adhere to the inner wall of the device and the surface of the adsorbent, gradually accumulating over time, and eventually blocking the channels and pores, causing freezing. This will not only seriously affect the normal operation of the cryogenic adsorption device, but will also greatly reduce the purification efficiency of helium and affect the quality of helium.

[0024] In view of this, the present application proposes a crude helium storage and recycling system for the cryogenic helium extraction process, which can effectively ensure the safety and quality of the helium production process through multi-parameter coordinated control and graded recycling strategy.

[0025] Example 1 The present application provides a crude helium storage and recycling system for a cryogenic helium extraction process, such as Figure 1As shown, it includes: a membrane separation device 1, a permeate boosting device 2, a pressure swing adsorption device 3, a cryogenic adsorption device 4 and a first storage tank group 5 connected in sequence; an unloading device 6, the unloading device 6 and the cryogenic adsorption device 4 are both connected to the outlet of the pressure swing adsorption device 3; a second storage tank group 7, the inlet of the second storage tank group 7 is connected to the unloading device 6; a first detection unit 8, the first detection unit 8 is arranged at the outlet of the pressure swing adsorption device 3, for detecting the concentrations of methane and carbon dioxide in the crude helium; a second detection unit 9, the second detection unit 9 is arranged at the outlet of the second storage tank group 7, for detecting the pressure of the crude helium and the Ne gas concentration; a first recycling loop 10, the first recycling loop 10 is connected to the outlet of the second storage tank group 7 and the inlet of the pressure swing adsorption device 3; a second recycling loop 11, the second recycling loop 11 is connected to the outlet of the second storage tank group 7 and the inlet of the permeate boosting device 2; a third recycling loop 12, the third recycling loop 12 is connected to the outlet of the second storage tank group 7 and the inlet; a control device, the control device is communicatively connected to the first detection unit 8, and the control device is used to control the crude helium gas to enter the cryogenic adsorption device 4 or the unloading device 6 according to the detection result of the first detection unit 8; wherein, if the first detection unit 8 detects that the methane concentration in the crude helium gas reaches a first concentration threshold, and / or the carbon dioxide concentration reaches a second concentration threshold, the control device controls the crude helium gas to enter the unloading device 6; the control device is communicatively connected to the second detection unit 9, and the control device is used to control the crude helium gas to enter one of the first recycling loop 10, the first recycling loop 10, and the second recycling loop 11 according to the detection result of the second detection unit 9; wherein, the control device determines whether the Ne gas concentration in the crude helium gas reaches a third concentration threshold, and if so, the control device controls the crude helium gas in the second storage tank group 7 to enter the third recycling loop 12; if not, the control device further determines whether the crude helium gas pressure is lower than the first pressure threshold, and if so, the control device controls the crude helium gas in the second storage tank group 7 to enter the second recycling loop 11.

[0026] The feed gas enters membrane separation unit 1, where the membrane's selective permeability initially separates some impurities, reducing the impurity content in the crude helium. The permeate gas then enters permeate booster 2, where it is boosted to prepare for subsequent processing in pressure swing adsorption unit 3. In pressure swing adsorption unit 3, impurities are further removed from the crude helium by leveraging the varying adsorption capacities of the adsorbent at varying pressures, achieving initial purification.

[0027] At the outlet of the pressure swing adsorption unit 3, a first detection unit 8 continuously monitors the concentrations of methane and carbon dioxide in the crude helium. When the methane concentration reaches a first threshold, the carbon dioxide concentration reaches a second threshold, or both exceed the threshold, the control device receives a signal from the first detection unit 8 and rapidly controls the valves, directing the crude helium to the unloading device 6. If neither the methane nor the carbon dioxide concentration exceeds the threshold, the crude helium smoothly enters the cryogenic adsorption unit 4. Within the cryogenic adsorption unit 4, the crude helium is further purified, concentrated, or dried by the adsorbent's selective adsorption of gas molecules in the low-temperature environment. The purified helium is then stored in the first storage tank assembly 5.

[0028] The crude helium entering the unloading device 6 is stored in the second storage tank group 7. The unloading device 6 is used to pressurize or depressurize the crude helium at the outlet of the pressure swing adsorption unit 3 to meet the storage requirements of the second storage tank group 7. A second detection unit 9 monitors the pressure and Ne gas concentration of the crude helium in real time at the outlet of the second storage tank group 7. If the Ne gas concentration reaches a third concentration threshold, the control device controls the relevant valves to allow the crude helium to enter the third recycling loop 12, returning to the inlet of the membrane separation unit 1 and undergoing the entire processing flow again to reduce the Ne gas content. If the Ne gas concentration does not exceed the standard, the control device then determines the crude helium pressure. If the crude helium pressure is greater than or equal to the first pressure threshold, the crude helium pressure meets the pressure of the pressure swing adsorption unit 3 and can be directly entered into the pressure swing adsorption unit 3 for re-adsorption without the need for pressurization. If the pressure is lower than the first pressure threshold, the control device controls the crude helium to enter the second recycling loop 11, returning to the inlet of the permeate booster 2. Through re-pressurization and subsequent processing, the crude helium pressure is increased to meet production requirements.

[0029] The storage and refining system provided in the embodiment of the present application has significant advantages. In terms of Ne gas recovery, effective recovery of Ne gas has been successfully achieved. In terms of pressure control, an innovative method of pressurization on demand is adopted, and only the crude helium gas that does not meet the pressure standard is pressurized, avoiding unnecessary energy consumption, not only improving the refining efficiency, but also significantly reducing the energy consumption of the entire system. From the perspective of equipment protection and production process, the system can effectively avoid freezing and blockage of the low-temperature adsorption device 4 and ensure its normal operation. At the same time, without interfering with the normal purification process of crude helium, the quality of crude helium is significantly improved, which reduces the processing pressure for the subsequent production of refined helium, and helps to improve the quality and production efficiency of refined helium in the deep-cold helium extraction process.

[0030] In some embodiments, the crude helium storage and recycling system for the cryogenic helium extraction process further includes: a third detection unit, which is connected to the pressure swing adsorption device 3 and is used to detect the pressure inside the pressure swing adsorption device 3; the control device is communicatively connected to the third detection unit, and the pressure value inside the pressure swing adsorption device 3 detected by the third detection unit is used as the first pressure threshold.

[0031] The pressure sensor, the core component of the third detection unit, is installed at a key pressure monitoring point within the pressure swing adsorption device 3, such as near the air inlet or outlet, to ensure accurate internal pressure readings. The third detection unit is connected to the control device via a shielded cable or wireless network to ensure stable data transmission and minimize the impact of external interference on the accuracy of pressure data.

[0032] The third detection unit continuously collects pressure data from the pressure swing adsorption device 3 and transmits the collected pressure values ​​to the control device at a set frequency, such as once per minute. The control device receives this data in real time and sets the most recently received pressure value as the first pressure threshold, which is used as the standard for subsequent crude helium pressure determination.

[0033] When the second detection unit 9 detects the crude helium pressure at the outlet of the second storage tank group 7, it transmits the data to the control device. The control device immediately compares this pressure value with the first pressure threshold provided by the third detection unit. If the crude helium pressure is lower than the first pressure threshold, the control device, according to preset logic, sends a signal to the relevant valve control component to open the valve leading to the second recycling loop 11, directing the crude helium to the inlet of the permeate booster 2 for re-pressurization. If the crude helium pressure is higher than the first pressure threshold, the control device sends a signal to the relevant valve control component to open the valve leading to the first recycling loop 10, directing the crude helium directly to the pressure swing adsorption device 3 for processing.

[0034] By using the third detection unit to dynamically acquire a pressure value as the first pressure threshold, the system can automatically adjust the judgment criteria based on the real-time operating status of the pressure swing adsorption device 3. For example, when the internal pressure of the device changes due to fluctuations in feed gas composition or changes in processing volume, the first pressure threshold changes accordingly, allowing the system to maintain optimal operating conditions and improving its overall dynamic adaptability.

[0035] Setting the first pressure threshold based on real-time pressure data significantly improves the accuracy of decisions regarding crude helium recycle and repressurization. This avoids potential misjudgments caused by fixed thresholds. For example, if the internal pressure of PSA unit 3 decreases due to unusual circumstances, the fixed threshold could incorrectly direct unnecessary crude helium into the recycle process, resulting in wasted resources or preventing it from being recycled, reducing recycle efficiency. The dynamic threshold ensures that recycle is initiated only when the crude helium pressure falls below the unit's current reasonable pressure, optimizing recycle decisions.

[0036] In some embodiments, during the recycling process, the second detection unit 9 monitors the pressure of the crude helium at the outlet of the second storage tank group 7 in real time. In the initial stage of recycling, when the second detection unit 9 detects that the pressure of the crude helium exceeds a first pressure threshold, the control device manipulates the relevant valves to direct the crude helium through the first recycling loop 10 and into the pressure swing adsorption unit 3. However, as recycling continues, the gas in the second storage tank group 7 decreases, causing the pressure within the tanks to gradually decrease, and in turn, the pressure at the outlet of the second storage tank group 7 also decreases. When the outlet pressure drops below the first pressure threshold required by the pressure swing adsorption unit 3, the control device responds quickly by controlling the valves to close the first recycling loop 10 and simultaneously open the second recycling loop 11. This allows all remaining crude helium in the second storage tank group 7 to smoothly enter the recycling process, ensuring full resource utilization and the integrity of the recycling process.

[0037] By directly feeding crude helium that meets the required pressure into the pressure swing adsorption unit 3 through the first recycling loop 10 at the initial stage of recycling, unnecessary pressurization steps are eliminated, allowing the qualified crude helium to quickly enter the next processing step, greatly improving recycling efficiency and saving time and costs. When the outlet pressure of the second storage tank group 7 drops, it is promptly switched to the second recycling loop 11, ensuring that the remaining crude helium in the tanks can also be recycled, avoiding the waste of resources caused by the inability to recycle some crude helium due to pressure fluctuations, and achieving maximum resource utilization.

[0038] In some embodiments, the pressure swing adsorption device 3 has multiple adsorption towers 301, which are arranged in parallel. The third detection unit detects the pressure value in each adsorption tower 301 respectively. The first recycling loop 10 is connected to the multiple adsorption towers 301 respectively. The control device controls the crude helium gas to enter one of the adsorption towers 301 through the first recycling loop 10 according to the pressure result detected by the third detection unit. The lowest pressure value among the multiple adsorption towers 301 detected by the third detection unit is used as the first pressure threshold.

[0039] Within each adsorption tower 301 of the pressure swing adsorption unit 3, high-precision pressure sensors are installed near the air inlet and outlet, serving as the detection components of the third detection unit. These pressure sensors are connected to the control device via dedicated signal transmission lines, ensuring stable and accurate data transmission.

[0040] The first recycling loop 10 is designed as a branch structure, with each branch connected to the inlet of each adsorption tower 301. The flow direction of the crude helium gas is controlled by electric valves installed on the branch pipelines, and these electric valves can be remotely controlled by a control device.

[0041] The third detection unit collects the pressure value within each adsorption tower 301 in real time. At regular intervals (e.g., every 10 minutes), the collected pressure data for all adsorption towers 301 is transmitted to the control device. After receiving the data, the control device compares and analyzes the pressure values ​​of multiple adsorption towers 301, selects the lowest pressure value, and sets this lowest pressure value as the first pressure threshold.

[0042] After the second detection unit 9 detects the pressure data of the crude helium gas at the outlet of the second storage tank group 7 and transmits it to the control device, the control device compares the crude helium gas pressure with the first pressure threshold. If the crude helium gas pressure exceeds the first pressure threshold, the control device, based on pre-set logic, sends an opening signal to the electric valve on the branch pipe of the adsorption tower 301 corresponding to the first pressure threshold, allowing the crude helium gas to enter the adsorption tower 301 through the first recycling loop 10 for further processing.

[0043] By introducing crude helium into the adsorption tower 301 with the lowest pressure, the relatively low pressure environment within the adsorption tower 301 can be fully utilized, allowing as much crude helium as possible to enter the pressure swing adsorption device 3 for processing through the first recycling loop 10. This method avoids blindly introducing crude helium into each adsorption tower 301, reduces unnecessary pressurization steps, reduces energy consumption, and greatly improves recycling efficiency and saves time and costs by allowing more qualified crude helium to quickly enter the next processing step. At the same time, other adsorption towers 301 can simultaneously perform raw gas purification work, thereby significantly improving the quality of the crude helium and improving the purification efficiency of the crude helium without interfering with the normal purification process of the crude helium.

[0044] In some embodiments, the permeate gas boosting device 2 is respectively connected to multiple adsorption towers 301, and the permeate gas boosting device 2 is communicatively connected to the control device. The permeate gas boosting device 2 is a multi-stage boosting pump structure, and the control device controls the boosting ratio of the permeate gas boosting device 2 according to the first pressure threshold.

[0045] Pipelines connect the permeate booster 2 to the multiple adsorption towers 301, ensuring that gas output from the permeate booster 2 can flow smoothly into each adsorption tower 301. Furthermore, a communication line connects the permeate booster 2 to the control device, enabling data exchange. The permeate booster 2 utilizes a multi-stage booster pump structure, with each stage connected sequentially via pipelines. Each stage is equipped with corresponding control valves and sensors to monitor and regulate gas flow and pressure.

[0046] The third detection unit continuously monitors the pressure within each adsorption tower 301 and transmits the data to the control device. Based on this pressure data, the control device calculates a first pressure threshold (e.g., the lowest pressure value among the multiple adsorption towers 301). The control device adjusts the pressure ratio of the permeate booster 2 based on this first pressure threshold. When crude helium needs to be delivered to the permeate booster 2 via the second recycling loop 11 for boosting, the permeate booster 2 increases the pressure of the crude helium to the lowest first pressure threshold, thereby avoiding unnecessary over-pressurization and reducing energy consumption.

[0047] In some embodiments, the crude helium storage and recycling system for the cryogenic helium extraction process further includes: a first pipeline, including a first main line and a pair of first branch pipelines, one end of the first main line is connected to the pressure swing adsorption device 3, and the other end is simultaneously connected to a pair of first branch pipelines, the pair of first branch pipelines are respectively connected to the low-temperature adsorption device 4 and the unloading device 6, and the first detection unit 8 is arranged on the first main line; a first flow control valve 13, the first flow control valves 13 are respectively arranged on the pair of first branch pipelines, the first flow control valves 13 are communicatively connected to the control device, and the control device controls the on and off of the first flow control valve 13 according to the detection result of the first detection unit 8.

[0048] Lay the first main line, and tightly connect one end of it to the outlet of the pressure swing adsorption device 3 to ensure that the crude helium after pressure swing adsorption can flow in smoothly. At the other end of the first main line, a pair of first branch pipelines are branched out. One of the branch pipelines leads to the low-temperature adsorption device 4, and the other leads to the unloading device 6. On the first main line, the first detection unit 8 is accurately installed to ensure that it can accurately detect the concentration of methane and carbon dioxide in the crude helium flowing through here. For a pair of first branch pipelines, a first flow control valve 13 is installed on each branch line. These control valves are connected to the control device through a communication line to ensure that the control device can control them in real time.

[0049] First detection unit 8 continuously monitors the methane and carbon dioxide concentrations in the crude helium gas and transmits this data to the control device in real time. When the methane concentration reaches a first threshold and / or the carbon dioxide concentration reaches a second threshold, the control device immediately issues a command to close the first flow control valve 13 on the branch line leading to the cryogenic adsorption device 4 and simultaneously open the first flow control valve 13 on the branch line leading to the unloading device 6. This directs the crude helium gas to the unloading device 6, preventing high-concentration impurities from entering the cryogenic adsorption device 4.

[0050] On the contrary, if the first detection unit 8 detects that the concentrations of methane and carbon dioxide in the crude helium are within the standard, the control device controls the first flow control valve 13 on the branch pipeline leading to the cryogenic adsorption device 4 to open, and the first flow control valve 13 on the branch pipeline leading to the unloading device 6 to close, so that the crude helium can smoothly enter the cryogenic adsorption device 4 for the next step of processing.

[0051] The coordinated operation of the first detection unit 8 and the first flow control valve 13 allows crude helium to be precisely diverted to the appropriate device based on the actual impurity concentration in the crude helium. This effectively prevents high-concentration impurity gases from entering the cryogenic adsorption device 4, preventing freezing and blockage of the cryogenic adsorption device 4 due to excessive impurities, thereby protecting the normal operation of the cryogenic adsorption device 4 and extending the service life of the equipment. The control device automatically controls the opening and closing of the first flow control valve 13 based on the detection data, automating the crude helium diversion process. This reduces manual intervention, lowers the risk of human error, and improves the reliability and stability of system operation.

[0052] In some embodiments, the crude helium storage and recycling system for the cryogenic helium extraction process also includes: a second pipeline, including a second main line and three second branch pipelines, one end of the second main line is connected to the outlet of the second storage tank group 7, and the other end is simultaneously connected to the three second branch pipelines, the three second branch pipelines are respectively connected to the membrane separation device 1, the permeate boosting device 2, and the pressure swing adsorption device 3, and the second detection unit 9 is arranged on the second main line; a second flow control valve 14, a second flow control valve 14 is respectively provided on each second branch pipeline, the second flow control valve 14 is communicatively connected to the control device, and the control device controls the on and off of the second flow control valve 14 according to the detection result of the second detection unit 9.

[0053] Build a second main line and firmly connect one end of it to the outlet of the second storage tank group 7 to ensure that the crude helium flowing out of the second storage tank group 7 can flow in smoothly. At the other end of the second main line, three second branch pipelines are branched out. These three branch pipelines are respectively connected to the membrane separation device 1, the permeate gas boosting device 2 and the pressure swing adsorption device 3, forming the first recycling loop 10, the second recycling loop 11 and the third recycling loop 12 respectively. On the second main line, the second detection unit 9 is precisely installed so that it can accurately detect the pressure and Ne gas concentration of the crude helium flowing through here. A second flow control valve 14 is installed on each second branch pipeline. These control valves are connected to the control device through a communication line to ensure that the control device can control them in real time.

[0054] Second detection unit 9 continuously monitors the pressure and Ne concentration of the crude helium gas, transmitting this data to the control device in real time. When it detects that the Ne concentration in the crude helium gas reaches a third threshold, the control device immediately issues a command to close second flow control valve 14 on the branch lines leading to the permeate booster 2 and pressure swing adsorption unit 3, while simultaneously opening second flow control valve 14 on the branch line leading to membrane separation unit 1. This directs the crude helium gas to membrane separation unit 1, where it undergoes renewed membrane separation processing to reduce the Ne concentration.

[0055] If the Ne gas concentration is within the specified range, the control device then determines the crude helium pressure. When the pressure falls below a first pressure threshold, the control device closes the second flow control valve 14 on the branch lines leading to the membrane separation unit 1 and the pressure swing adsorption unit 3, and opens the second flow control valve 14 on the branch line leading to the permeate booster 2. The crude helium then enters the permeate booster 2, where it is re-pressurized to increase its pressure.

[0056] If the crude helium pressure is normal and the Ne gas concentration is within the standard, the control device closes the second flow control valve 14 on the branch pipeline leading to the membrane separation device 1 and the permeate gas boosting device 2, and opens the second flow control valve 14 on the branch pipeline leading to the pressure swing adsorption device 3, allowing the crude helium to enter the pressure swing adsorption device 3 for further processing.

[0057] Based on the detection results of the second detection unit 9, the second flow control valve 14 precisely controls the flow direction of the crude helium, achieving targeted recycling. Crude helium with excessive Ne concentration is directed into the membrane separation device 1, effectively reducing the Ne content and improving the purity of the helium. Crude helium with insufficient pressure is directed into the permeate booster 2 to increase the pressure, ensuring smooth subsequent processing and ultimately guaranteeing the quality of the refined helium.

[0058] This fast and accurate diversion mechanism reduces equipment failures and production interruptions caused by mismatched crude helium gas conditions. By automatically controlling the on / off state of the second flow control valve 14, the control device automatically controls the valve based on detection data, automating the selection of the crude helium recycle path. Operators only need to focus on the overall system operation, eliminating the need for frequent manual intervention in the flow of crude helium. This significantly improves work efficiency and enables the system to respond more quickly and accurately to changing operating conditions.

[0059] In some embodiments, the crude helium storage and recycling system for the cryogenic helium extraction process further includes: a recovery device connected to the membrane separation device 1 for recovering the Ne gas separated by the membrane separation device 1 .

[0060] At the gas separation outlet of the membrane separation device 1, a special pipeline is laid to connect to the recovery device. When the membrane separation device 1 starts working and separates the Ne gas from the crude helium, the Ne gas flows along the connecting pipeline to the recovery device. The recovery device can effectively recycle the Ne gas separated by the membrane separation device 1, avoiding the waste of Ne gas. As a valuable rare gas, Ne gas has a wide range of applications in electronics, optics and other fields. Through recycling, not only the comprehensive utilization rate of resources in the helium production process is improved, but the recovered Ne gas can also be sold for a second time or used in other related industries, creating additional economic benefits for the enterprise.

[0061] In some embodiments, the first detection unit 8 may include two component detection devices, such as a gas chromatograph or mass spectrometer, for detecting the methane and carbon dioxide gas components. The second detection unit 9 may include a component detection device and a pressure detection device, which may be a pressure gauge or pressure sensor. The component detection device is used to detect the Ne gas component, and the pressure detection device is used to detect the gas pressure. The third detection unit may include multiple pressure detection devices.

[0062] Example 2 The present application provides a recycling control method for the crude helium storage and recycling system for the cryogenic helium extraction process of Example 1, such as Figure 2 Shown, including: S1. Setting a first concentration threshold, a second concentration threshold, a third concentration threshold, and a first pressure threshold; obtaining methane and carbon dioxide concentration data in the crude helium gas at the outlet of the pressure swing adsorption device 3, and pressure data and Ne gas concentration data of the crude helium gas at the outlet of the second storage tank group 7; S2. Compare the methane concentration data with a first concentration threshold, and compare the carbon dioxide concentration data with a second concentration threshold; determine whether the methane concentration data is greater than the first concentration threshold, and whether the carbon dioxide concentration data is greater than the second concentration threshold; S201, if at least one of the judgment results is yes, control the crude helium to enter the unloading device 6; S202, if not, enter the low-temperature adsorption device 4; S3, comparing the Ne gas concentration data with the second concentration threshold to determine whether the Ne gas concentration data is greater than the third concentration threshold; S301, if yes, control the crude helium to enter the membrane separation device 1, and then control the crude helium separated by the membrane separation device 1 to enter the permeate gas boosting device 2 and the pressure swing adsorption device 3 in sequence; S302: If not, compare the pressure data with the first pressure threshold to determine whether the pressure data is greater than the first pressure threshold; S302a, if it is greater than, control the crude helium to enter the pressure swing adsorption device 3; S302b: If it is less than, control the crude helium to enter the permeate gas booster 2 and the pressure swing adsorption device 3 in sequence.

[0063] Specifically, S1 includes presetting a first concentration threshold (for methane), a second concentration threshold (for carbon dioxide), a third concentration threshold (for Ne gas), and a first pressure threshold in the system control device. These thresholds can be set based on in-depth research into helium production processes and a precise assessment of the processing capabilities of each device. For example, the first and second concentration thresholds can be determined based on the tolerance of the cryogenic adsorption device 4 to methane and carbon dioxide, while the third concentration threshold and the first pressure threshold can be determined based on the Ne gas and pressure requirements of the membrane separation device 1, the permeate booster device 2, and the pressure swing adsorption device 3.

[0064] The first detection unit 8 collects real-time data on the methane and carbon dioxide concentrations in the crude helium gas at the outlet of the pressure swing adsorption device 3, while the second detection unit 9 obtains pressure data and Ne gas concentration data for the crude helium gas at the outlet of the second storage tank group 7. These detection units transmit the collected data to the control device in real time.

[0065] S2 includes: after receiving the data, the control device immediately compares the methane concentration data with the first concentration threshold, and at the same time compares the carbon dioxide concentration data with the second concentration threshold, and then makes a judgment.

[0066] S201 includes: if the first detection unit 8 detects that the methane concentration exceeds the standard or the carbon dioxide concentration exceeds the standard, or both the methane concentration and the carbon dioxide concentration exceed the standard, the control device sends an opening signal to the first flow control valve 13 on the branch pipeline leading to the unloading device 6, and at the same time closes the first flow control valve 13 on the branch pipeline leading to the low-temperature adsorption device 4.

[0067] S202 includes: if the concentrations of methane and carbon dioxide are both within the standard, the crude helium enters the cryogenic adsorption device 4 through the first flow control valve 13 for treatment.

[0068] S3 includes: the second detection unit 9 detects the Ne gas concentration and pressure of the crude helium gas after being processed by the unloading device 6 and entering the second storage tank group 7. The control device compares the Ne gas concentration data with the third concentration threshold and then makes a judgment.

[0069] S301 includes: If the Ne gas concentration is greater than the third concentration threshold, the control device controls the second flow control valve 14 to allow the crude helium gas to enter the membrane separation device 1. In the membrane separation device 1, the crude helium gas is processed and then enters the permeate gas booster 2 and the pressure swing adsorption device 3 in sequence. After completing the recycling process, the system executes step S1 again to re-acquire data and make a judgment.

[0070] S302 includes: if the Ne gas concentration does not exceed the standard, the control device then compares the pressure data with the first pressure threshold and then makes a judgment.

[0071] S302a includes: if the pressure is greater than the first pressure threshold, the control device controls the crude helium to directly enter the pressure swing adsorption device 3 through the second flow control valve 14. After completing one re-refining process, the system executes step S1 again to re-acquire data and make a judgment.

[0072] S302b includes: if the pressure is less than the first pressure threshold, the control device controls the crude helium to sequentially enter the permeate booster 2 and the pressure swing adsorption device 3. After completing a refining process, the system executes step S1 again to reacquire data and make a judgment.

[0073] By precisely setting the concentration threshold and pressure threshold, and performing real-time comparison and judgment of various parameters in the crude helium, the flow direction and processing path of the crude helium can be accurately controlled. Impurities such as methane, carbon dioxide and Ne gas are effectively removed, thereby improving the purity of the helium. This recycling control method achieves efficient recycling of crude helium through multiple cycles of judgment and processing. For crude helium in different states, the most appropriate recycling path can be selected. For example, targeted treatment can be performed for situations where the Ne gas concentration exceeds the standard or the pressure is insufficient. This not only improves the recovery rate of helium, but also fully utilizes the processing capacity of each device, reduces resource waste, and reduces production costs. Through reasonable diversion and recycling mechanisms, damage to the equipment caused by excessive impurity concentration or abnormal pressure is avoided, and high concentrations of methane and carbon dioxide entering the low-temperature adsorption device 4, resulting in freezing and blockage, is avoided, thereby protecting the normal operation of the equipment. At the same time, through the recycling treatment and parameter monitoring of crude helium, the stable operation of the entire helium storage and recycling system is ensured, the risk of production interruption is reduced, and production efficiency is improved.

[0074] In some embodiments, the recycling control method further includes: acquiring pressure data within the pressure swing adsorption device 3 and transmitting the acquired pressure value to the control device. The control device receives the data in real time and sets the most recently received pressure value as the first pressure threshold.

[0075] By using the third detection unit to dynamically obtain the pressure value as the first pressure threshold, the system can automatically adjust the judgment standard according to the real-time operating status of the pressure swing adsorption device 3. This method enables the system to always maintain the best operating state and improves the overall dynamic adaptability.

[0076] In some embodiments, the recycling control method further includes: during the initial recycling phase, when the pressure of the crude helium is detected to exceed a first pressure threshold, the control device first controls the crude helium to enter the pressure swing adsorption device 3 via the first recycling loop 10. The crude helium pressure continues to be monitored in real time. When the pressure of the crude helium drops below the first pressure threshold, the control device controls the closure of the first recycling loop 10 and the simultaneous opening of the second recycling loop 11. By directly delivering crude helium that meets the pressure requirements to the pressure swing adsorption device 3 via the first recycling loop 10 during the initial recycling phase, unnecessary pressurization steps are reduced, allowing qualified crude helium to quickly enter the next processing step, significantly improving recycling efficiency and saving time and costs. When the outlet pressure of the second storage tank group 7 decreases, the control device promptly switches to the second recycling loop 11, ensuring that the remaining crude helium in the tanks can also be recycled, avoiding resource waste caused by the inability to recycle some crude helium due to pressure fluctuations, and maximizing resource utilization.

[0077] In some embodiments, the pressure value in each adsorption tower 301 in the pressure swing adsorption device 3 is obtained, and the collected pressure data of all adsorption towers 301 are transmitted to the control device. After receiving the data, the control device compares and analyzes the pressure values ​​of multiple adsorption towers 301, selects the lowest pressure value, and sets the lowest pressure value as the first pressure threshold. By introducing crude helium into the adsorption tower 301 with the lowest pressure, the relatively low pressure environment in the adsorption tower 301 can be fully utilized, and as much crude helium as possible can enter the pressure swing adsorption device 3 through the first recycling loop 10 for processing. This method avoids blindly introducing crude helium into each adsorption tower 301, reduces unnecessary pressurization links, reduces energy consumption, and greatly improves recycling efficiency and saves time costs by allowing more qualified crude helium to quickly enter the next processing flow.

[0078] In some embodiments, the control device adjusts the pressurization ratio of the permeate gas boosting device 2 based on the first pressure threshold. When the crude helium needs to be delivered to the permeate gas boosting device 2 via the second recycling loop 11 for pressurization, the permeate gas boosting device 2 can increase the crude helium to the lowest first pressure threshold, thereby avoiding unnecessary over-pressurization and reducing energy consumption.

[0079] The embodiment of the present application also provides a computer device, including a memory, a processor and a computer program stored in the memory, wherein the processor executes the computer program to implement the above Figure 2 Steps of the method shown.

[0080] The present application also provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the above-mentioned Figure 2 Steps of the method shown.

[0081] The present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the above Figure 2 Steps of the method shown.

[0082] The algorithms and displays provided herein are not inherently related to any particular computer, virtual system, or other device. Various general-purpose systems may also be used together with the teachings herein. Based on the above description, it is apparent that the structure required for constructing such systems is suitable. In addition, the present application is not directed to any specific programming language. It should be understood that various programming languages ​​may be utilized to implement the present application described herein, and the description of the specific languages ​​above is provided for the purpose of disclosing the preferred embodiment of the present application.

[0083] In addition, the memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0084] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0085] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0086] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0087] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0088] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0089] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0090] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can be implemented using any method or technology to store information. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change RAM (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media such as modulated data signals and carrier waves.

[0091] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0092] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0093] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A crude helium storage and recycling system for cryogenic helium extraction process, characterized in that: include: A membrane separation device, a permeate gas pressurizing device, a pressure swing adsorption device, a cryogenic adsorption device and a first storage tank group connected in sequence; an unloading device, wherein the unloading device and the low-temperature adsorption device are both connected to the outlet of the pressure swing adsorption device; a second storage tank group, wherein the inlet of the second storage tank group is connected to the unloading device; a first detection unit, the first detection unit being arranged at the outlet of the pressure swing adsorption device and being used to detect the concentrations of methane and carbon dioxide in the crude helium; A second detection unit is provided at the outlet of the second storage tank group, and is used to detect the pressure of the crude helium gas and the Ne gas concentration; a first recycling circuit, the first recycling circuit connecting the outlet of the second storage tank group and the inlet of the pressure swing adsorption device; a second recycling circuit, the second recycling circuit connecting the outlet of the second storage tank group and the inlet of the permeate gas pressurizing device; a third recycling loop, the third recycling loop connecting the outlet of the second storage tank group and the inlet of the membrane separation device; a control device, the control device being in communication with the first detection unit, the control device being configured to control the crude helium gas to enter the cryogenic adsorption device or the unloading device based on a detection result of the first detection unit; wherein, if the first detection unit detects that the methane concentration in the crude helium gas reaches a first concentration threshold, and / or the carbon dioxide concentration reaches a second concentration threshold, the control device controls the crude helium gas to enter the unloading device; The control device is communicatively connected to the second detection unit, and is used to control the crude helium gas to enter one of the first recycling circuit, the first recycling circuit, and the second recycling circuit according to the detection result of the second detection unit; wherein, the control device determines whether the Ne gas concentration in the crude helium gas reaches a third concentration threshold value, and if so, the control device controls the crude helium gas in the second storage tank group to enter the third recycling circuit; if not, the control device further determines whether the crude helium gas pressure is lower than a first pressure threshold value, and if so, the control device controls the crude helium gas in the second storage tank group to enter the second recycling circuit.

2. The crude helium storage and recycling system for cryogenic helium extraction process according to claim 1 is characterized in that: Also includes: a third detection unit, connected to the pressure swing adsorption device, and configured to detect the pressure inside the pressure swing adsorption device; The control device is in communication with the third detection unit, and the pressure value inside the pressure swing adsorption device detected by the third detection unit serves as the first pressure threshold.

3. The crude helium storage and recycling system for cryogenic helium extraction process according to claim 2 is characterized in that: The pressure swing adsorption device has a plurality of adsorption towers, which are arranged in parallel, and the third detection unit detects the pressure value in each of the adsorption towers respectively; The first recycling circuit is connected to the plurality of adsorption towers respectively, and the control device controls the crude helium gas to enter one of the adsorption towers via the first recycling circuit according to the pressure result detected by the third detection unit; The lowest pressure value among the plurality of adsorption towers detected by the third detection unit is used as the first pressure threshold.

4. The crude helium storage and recycling system for cryogenic helium extraction process according to claim 3 is characterized in that: The permeate gas boosting device is connected to the multiple adsorption towers respectively, and the permeate gas boosting device is in communication connection with the control device. The permeate gas boosting device is a multi-stage boosting pump structure. The control device controls the boosting ratio of the permeate gas boosting device according to the first pressure threshold.

5. The crude helium storage and recycling system for cryogenic helium extraction process according to claim 1 is characterized in that: Also includes: a first pipeline comprising a first main line and a pair of first branch lines, wherein one end of the first main line is connected to the pressure swing adsorption device, and the other end is connected to a pair of first branch lines, wherein the pair of first branch lines are respectively connected to the low-temperature adsorption device and the unloading device, and the first detection unit is disposed on the first main line; A first flow control valve is provided on a pair of the first branch pipelines respectively. The first flow control valve is communicatively connected with the control device. The control device controls the on and off of the first flow control valve according to the detection result of the first detection unit.

6. The crude helium storage and recycling system for cryogenic helium extraction process according to claim 1 is characterized in that: Also includes: a second pipeline comprising a second main line and three second branch lines, wherein one end of the second main line is connected to the outlet of the second storage tank group, and the other end is simultaneously connected to the three second branch lines, the three second branch lines being respectively connected to the membrane separation device, the permeate gas pressurizing device, and the pressure swing adsorption device, and the second detection unit is disposed on the second main line; A second flow control valve is provided on each of the second branch pipelines, and the second flow control valve is communicatively connected to the control device, and the control device controls the on and off of the second flow control valve according to the detection result of the second detection unit.

7. The crude helium storage and recycling system for cryogenic helium extraction process according to claim 1 is characterized in that: Also includes: A recovery device is connected to the membrane separation device and is used to recover the Ne gas separated by the membrane separation device.

8. A recycling control method, used in the crude helium storage and recycling system for a cryogenic helium extraction process according to any one of claims 1 to 7, characterized in that: include: Setting a first concentration threshold, a second concentration threshold, a third concentration threshold, and a first pressure threshold; Acquire methane and carbon dioxide concentration data in the crude helium gas at the outlet of the pressure swing adsorption device, and pressure data and Ne gas concentration data of the crude helium gas at the outlet of the second storage tank group; comparing the methane concentration data with the first concentration threshold, and comparing the carbon dioxide concentration data with the second concentration threshold; Determine whether the methane concentration data is greater than the first concentration threshold, and whether the carbon dioxide concentration data is greater than the second concentration threshold; If at least one of the judgment results is yes, the crude helium is controlled to enter the unloading device, otherwise it enters the low-temperature adsorption device; Comparing the Ne gas concentration data with the second concentration threshold to determine whether the Ne gas concentration data is greater than the third concentration threshold, and if so, controlling the crude helium gas to enter the membrane separation device, and then controlling the crude helium gas separated by the membrane separation device to enter the permeate gas boosting device and the pressure swing adsorption device in sequence; Otherwise, the pressure data is compared with the first pressure threshold to determine whether the pressure data is greater than the first pressure threshold. If so, the crude helium is controlled to enter the pressure swing adsorption device; if so, the crude helium is controlled to enter the permeate boosting device and the pressure swing adsorption device in sequence.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory, wherein: The processor executes the computer program to implement the steps of the method according to claim 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to claim 8 are implemented.

11. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to claim 8 are implemented.

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