Novel starting method for PSA (Pressure Swing Adsorption) hydrogen extraction device

Abstract

The invention relates to the technical field of gas purification, in particular to a novel start-up method for a PSA (Pressure Swing Adsorption) hydrogen extraction device, which comprises the following steps: on the basis of the working environment of the PSA hydrogen extraction device, checking before start-up is carried out, nitrogen replacement is carried out, the oxygen content of a hydrogen extraction system is controlled within a preset range, and the pressure of the hydrogen extraction system is reduced to normal pressure; the difference between the current environment data and the standard environment data is analyzed, the valve opening degree and the adsorption pressure are adjusted, the equipment operation parameters are optimized to meet the current environment conditions, and an environment parameter adjusting instruction is obtained. By collecting and analyzing the current environmental data, dynamically adjusting the adsorption pressure and the valve opening and connecting the gas quality monitor to collect and analyze the hydrogen purity in real time, the concentration change of impure substances can be found in time, the adsorption time is optimized according to the data, and it is ensured that the hydrogen purity continuously reaches the high standard; and through continuous monitoring and quality verification of the hydrogen purity of the product, the consistency and reliability of the hydrogen product are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of gas purification, and in particular to a novel start-up method for a PSA hydrogen extraction device. Background Art

[0002] The field of gas purification technology focuses on removing impure substances from mixed gases by physical or chemical methods to extract high-purity gas components. This technical field covers a variety of separation technologies, including adsorption, absorption, membrane separation, cryogenic fractionation, etc. In industrial applications, gas purification technology is crucial, especially in the chemical, pharmaceutical, electronic manufacturing, food processing and energy production industries. These technologies not only improve product quality, but also greatly optimize the energy efficiency and economic benefits of the production process.

[0003] Among them, the new startup method for PSA hydrogen extraction unit is mainly used to optimize the startup efficiency and gas recovery effect of hydrogen purification unit. The method is applicable to pressure swing adsorption hydrogen extraction unit. In the initial stage of operation, it can effectively recover unqualified hydrogen and reduce resource waste. By optimizing the operation process and control system of the equipment, the method improves the production purity of hydrogen and the utilization rate of raw gas, improves the economic benefits and environmental performance of hydrogen production facilities, and reduces energy waste.

[0004] The traditional startup method failed to effectively avoid the initial production of substandard hydrogen during the startup and shutdown of the PSA hydrogen extraction unit, resulting in a waste of resources. The traditional method sets fixed operating parameters and ignores the impact of environmental conditions, such as temperature fluctuations and humidity changes. For example, the adsorption method is less efficient in environments with high temperatures or high humidity. The traditional method lacks adaptability to changes in environmental conditions, resulting in the equipment operating in non-ideal environments, affecting efficiency and purity. Failure to achieve refined control and real-time adjustment has led to low energy efficiency and increased costs in the production process, and even affected the production arrangements and product quality of downstream users due to unstable product quality. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a new start-up method for a PSA hydrogen extraction device.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: a new start-up method for a PSA hydrogen extraction device, comprising the following steps:

[0007] S1: Based on the working environment of the PSA hydrogen extraction device, a pre-operation inspection is carried out, and nitrogen replacement is performed to control the oxygen content of the hydrogen extraction system within the preset range, and the pressure of the hydrogen extraction system is reduced to normal pressure. The difference between the current environmental data and the standard environmental data is analyzed, the valve opening and adsorption pressure are adjusted, the equipment operating parameters are optimized to meet the current environmental conditions, and the environmental parameter adjustment instructions are obtained;

[0008] S2: Based on the environmental parameter adjustment instruction, monitor the real-time data of the PSA hydrogen extraction device, evaluate the deviation between the real-time data and the preset parameters, and make fine adjustments according to the feedback of the control strategy, including adjusting the pressure setting and hydrogen flow rate of the adsorption tower to obtain the adjusted operation status information;

[0009] S3: Based on the adjusted operation status information, a gas quality monitor connected to the output end of the PSA device collects the purity data of hydrogen in real time, identifies the change trend of the concentration of impure substances during the adsorption process, adjusts the adsorption time according to the change trend of the concentration of impure substances, optimizes the hydrogen purity to meet the standard requirements, and obtains the optimized purity control result;

[0010] S4: Based on the optimized purity control result, monitor the purity of the product hydrogen, verify that the hydrogen purity reaches the preset standard, analyze the volatility of the hydrogen purity, evaluate whether the output hydrogen quality is qualified, output the qualified hydrogen through the product pipeline, and obtain the product hydrogen quality assurance result.

[0011] The present invention is improved in that the step of analyzing the difference between the current environmental data and the standard environmental data is:

[0012] S111: Based on the working environment of the PSA hydrogen extraction device, an environmental sensor is set to collect real-time temperature, humidity and pressure data to obtain an environmental monitoring data set;

[0013] S112: extracting set standard environmental parameters from the system database, including standard temperature, standard humidity and standard pressure, to obtain a standard environmental data set;

[0014] S113: Based on the environmental monitoring data set and the standard environmental data set, the formula:

[0015] ;

[0016] Calculate the environmental deviation index and obtain the environmental deviation analysis results;

[0017] in, is the actual measured temperature, is the standard temperature, is the actual measured humidity, is the standard humidity, is the actual measured pressure, is the standard pressure, , and is the weight coefficient.

[0018] The present invention is improved in that the step of obtaining the environmental parameter adjustment instruction is:

[0019] S121: Based on the environmental deviation analysis result, the actual valve opening data is compared with the preset valve opening data, the opening difference that needs to be adjusted is determined, and the valve opening is adjusted in real time to obtain the adjusted valve opening data;

[0020] S122: Based on the adjusted valve opening data and the environmental deviation analysis result, the formula:

[0021] ;

[0022] Calculate the adjusted adsorption pressure and obtain the environmental parameter adjustment instruction;

[0023] in, is the adjusted adsorption pressure, is the current adsorption pressure of the device, is the environmental deviation index, is the adjustment coefficient.

[0024] The present invention is improved in that the step of evaluating the deviation between the real-time data and the preset parameters is:

[0025] S211: Based on the environmental parameter adjustment instruction, real-time data of the PSA hydrogen extraction device is collected, including key parameters of temperature, pressure and flow rate, to obtain a real-time data set;

[0026] S212: Based on the real-time data set, compare with preset parameters, including temperature standard, pressure standard and flow rate standard, analyze the deviation between the actual data and the preset data, and generate real-time deviation information;

[0027] S213: Based on the real-time deviation information, the formula:

[0028] ;

[0029] Calculate the operation deviation index and obtain real-time deviation analysis results;

[0030] in, is the running deviation index, represents the actual parameter, Represents preset parameters.

[0031] The present invention is improved in that the step of obtaining the adjusted running status information is:

[0032] S221: Based on the real-time deviation analysis result, the operation deviation index is compared with a preset deviation standard to determine whether the pressure and hydrogen flow rate of the adsorption tower need to be adjusted, and pressure and flow rate adjustment requirement information is obtained;

[0033] S222: Based on the pressure and flow rate adjustment demand information, the formula is:

[0034] ;

[0035] Calculate the optimized parameters;

[0036] in, represents the optimized parameters, Indicates the current operating parameters. is the target parameter, is the adjustment factor, is the running deviation index;

[0037] S223: Based on the optimized parameters, adjust the control valve to modify the hydrogen flow rate, and adjust the output of the pressure pump to verify that the pressure and flow rate of the adsorption tower reach the ideal state, and obtain the adjusted operating parameters.

[0038] The present invention is improved in that the step of identifying the change trend of the concentration of impure substances during the adsorption process is:

[0039] S311: Based on the adjusted operation status information, configure the gas quality monitor interface to match the output end of the PSA device, monitor the hydrogen purity in real time through the monitor, and obtain real-time hydrogen purity data;

[0040] S312: Based on the real-time hydrogen purity data, the formula:

[0041] ;

[0042] Calculate the concentration change trend index of impure substances to obtain concentration change trend information;

[0043] in, Indicates the concentration trend index of impure substances. and Represent the concentration change values ​​at the current and previous moments, respectively. Indicates the time interval, is the adjustment factor.

[0044] The present invention is improved in that the steps for obtaining the optimized purity control result are:

[0045] S321: Based on the concentration change trend information, the formula:

[0046] ;

[0047] Calculate the adjusted adsorption time;

[0048] in, is the adjusted adsorption time, is the standard adsorption time, is the impure substance concentration change trend index, is the adjustment factor;

[0049] S322: Based on the adjusted adsorption time, the operating parameters of the PSA equipment are reset to carry out the actual adsorption process, and the hydrogen purity is monitored again to check whether the hydrogen purity meets the standard requirements, so as to obtain an optimized purity control result.

[0050] The present invention is improved in that the steps for obtaining the product hydrogen quality assurance result are:

[0051] S411: Based on the optimized purity control result, a hydrogen sample is collected in real time through a quality monitor connected to the PSA device to detect the current hydrogen purity, and the formula is:

[0052] ;

[0053] Calculate the purity fluctuation index;

[0054] in, is the purity fluctuation index, is the standard deviation of the hydrogen purity samples, is the average purity of the sample;

[0055] S412: Based on the purity fluctuation index, the purity is compared with the preset standard to determine whether the purity meets the preset standard, and the qualified hydrogen is output through the product pipeline to obtain the product hydrogen quality assurance result.

[0056] Compared with the prior art, the advantages and positive effects of the present invention are:

[0057] In the present invention, by collecting and analyzing current environmental data, the adsorption pressure and valve opening are dynamically adjusted, and the operating conditions of the equipment are optimized, so that it always runs in the best state, reducing energy waste and improving the utilization rate of raw gas. By connecting a gas quality monitor, the hydrogen purity is collected and analyzed in real time, the concentration changes of impure substances can be discovered in time, and the adsorption time is optimized according to the data to ensure that the hydrogen purity continues to reach high standards. Through continuous monitoring and quality verification of the hydrogen purity of the product, the consistency and reliability of the hydrogen product are guaranteed, the quality fluctuation of hydrogen is reduced, and the controllability and predictability of the entire production process are enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 is a flow chart of the method of the present invention;

[0059] Figure 2 A flow chart of analyzing the difference between current environmental data and standard environmental data in the present invention;

[0060] Figure 3 A flow chart for obtaining environmental parameter adjustment instructions for the present invention;

[0061] Figure 4 A flow chart of the present invention for evaluating the deviation of real-time data from preset parameters;

[0062] Figure 5 A flow chart of obtaining adjusted operating status information for the present invention;

[0063] Figure 6 A flow chart showing the changing trend of the concentration of impure substances in the adsorption process of the present invention;

[0064] Figure 7 A flow chart for obtaining optimized purity control results for the present invention;

[0065] Figure 8 The present invention is a flow chart for obtaining product hydrogen quality assurance results. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0067] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0068] See also Figure 1 The present invention provides a technical solution: a new start-up method for a PSA hydrogen extraction device, comprising the following steps:

[0069] S1: Based on the working environment of the PSA hydrogen extraction device, conduct a pre-operation inspection to verify the process, and check whether the on-site programmable valves and regulating valves are smooth through system idling, and perform nitrogen replacement to control the oxygen content of the hydrogen extraction system within the preset range, and reduce the pressure of the hydrogen extraction system to normal pressure, collect the temperature, humidity and pressure data of the current environment, analyze the difference between the current environment data and the standard environment data, adjust the valve opening and adsorption pressure, optimize the equipment operating parameters to meet the current environmental conditions, and obtain environmental parameter adjustment instructions;

[0070] S2: Based on the environmental parameter adjustment instructions, monitor the real-time data of the PSA hydrogen extraction device, evaluate the deviation between the real-time data and the preset parameters, and make fine adjustments according to the feedback of the control strategy, including adjusting the pressure setting and hydrogen flow rate of the adsorption tower to achieve the best operating state and obtain the adjusted operating state information;

[0071] S3: Based on the adjusted operation status information, the gas quality monitor connected to the output end of the PSA equipment collects the purity data of hydrogen in real time, identifies the change trend of the concentration of impure substances during the adsorption process, adjusts the adsorption time according to the change trend of the concentration of impure substances, optimizes the hydrogen purity to meet the standard requirements, and obtains the optimized purity control result;

[0072] S4: Based on the optimized purity control results, monitor the purity of the product hydrogen, verify that the hydrogen purity reaches the preset standard, analyze the volatility of the hydrogen purity, evaluate whether the output hydrogen quality is qualified, output the qualified hydrogen through the product pipeline, and obtain the product hydrogen quality assurance result.

[0073] The environmental parameter adjustment instructions include the adsorption pressure adjustment value, the valve opening adjustment value and the adsorption time adjustment value. The adjusted operating status information includes the pressure setting value, the flow rate setting value and the adsorption temperature setting value. The optimized purity control results include the hydrogen purity value, the gas flow rate adjustment value and the adsorbent regeneration cycle adjustment value. The product hydrogen quality assurance results include the final hydrogen purity value, the final gas flow rate and the adsorbent usage status.

[0074] See also Figure 2 ,The steps to analyze the difference between the current environment data and the standard environment data are:

[0075] S111: Based on the working environment of the PSA hydrogen extraction device, an environmental sensor is set to collect real-time temperature, humidity and pressure data to obtain an environmental monitoring data set;

[0076] The process of deploying environmental monitoring equipment involves installing sensors to collect temperature, humidity and pressure data in real time. The sensors have the ability to work stably under the working environment conditions of the equipment to ensure the accuracy and reliability of the data. The data collection frequency of the sensors is set to once per minute to capture subtle changes in the environment. The collected data is transmitted to the central monitoring platform in real time via an encrypted wireless network. The central monitoring platform will perform preliminary screening and processing of the data, eliminate obvious error data, and store the screened data in the environmental monitoring data set. The process ensures real-time updating and accuracy of the data.

[0077] S112: extracting set standard environmental parameters from the system database, including standard temperature, standard humidity and standard pressure, to obtain a standard environmental data set;

[0078] The process of retrieving standard environmental parameter data from the control system's database includes reading data from multiple preset standard configuration files. The data is based on standard values ​​obtained from historical environmental data and environmental simulation tests. The read parameters include standard values ​​of temperature, humidity and pressure. The standard environmental parameter data set is obtained by comparing environmental data from different regions and seasons. The setting of standard parameters helps the monitoring system to accurately assess the current environmental conditions, and thus provides an effective reference benchmark when monitoring the deviation between actual environmental parameters and standard parameters.

[0079] S113: Based on the environmental monitoring data set and the standard environmental data set, the formula is:

[0080] ;

[0081] Calculate the environmental deviation index and obtain the environmental deviation analysis results;

[0082] in, is the actual measured temperature, is the standard temperature, is the actual measured humidity, is the standard humidity, is the actual measured pressure, is the standard pressure, , and is the weight coefficient.

[0083] formula:

[0084] ;

[0085] The formula is useful in that by adjusting the parameters , and To weight the changes in temperature, humidity, and pressure, the formula can more flexibly adapt to the impact of different environmental factors on the overall environmental assessment, thereby providing an accurate environmental deviation assessment.

[0086] Detailed explanation of the formula and the process of formula calculation and derivation:

[0087] set up Spend, Spend, , , atm, atm, , , , insert the formula to calculate, and get .

[0088] The result shows that the environmental deviation index is 0.141, which means that there is a slight deviation between the actual environment and the standard environment. Providing this value helps equipment operators understand the difference between the current environmental conditions and the preset standards, and then make necessary adjustments.

[0089] See also Figure 3 , the steps to obtain the environmental parameter adjustment instructions are:

[0090] S121: Based on the environmental deviation analysis result, the actual valve opening data is compared with the preset opening data, the opening difference that needs to be adjusted is determined, and the valve opening is adjusted in real time to obtain the adjusted valve opening data;

[0091] According to the results of the environmental deviation analysis, the valve opening is adjusted, including using automatic control equipment to receive adjustment instructions, automatically adjusting the valve opening, and automatically performing the adjustment by calculating the specific opening difference that needs to be adjusted based on the comparison of real-time data with preset data. The adjustment accuracy and response time of the valve are key factors to ensure the stable operation of the equipment. The system will record the opening data before and after the adjustment to provide data support for the subsequent operation effect evaluation. During the adjustment process, the system will also synchronously check the operating status of the valve to ensure the smooth progress of the adjustment activity.

[0092] S122: Based on the adjusted valve opening data and environmental deviation analysis results, the formula:

[0093] ;

[0094] Calculate the adjusted adsorption pressure and obtain the environmental parameter adjustment instruction;

[0095] in, is the adjusted adsorption pressure, is the current adsorption pressure of the device, is the environmental deviation index, is the adjustment coefficient.

[0096] formula:

[0097] ;

[0098] The benefit of the formula is that by adjusting the coefficient and environmental deviations The logarithmic form of is multiplied to achieve fine control of the adsorption pressure, making the pressure adjustment smoother and more sensitive to adapt to environmental changes of varying degrees.

[0099] Detailed explanation of the formula and the process of formula calculation: Setting the initial adsorption pressure kPa, environmental deviation index , adjustment coefficient , then the adjustment of adsorption pressure is calculated as kPa.

[0100] This indicates that under slight environmental deviations, the adjustment of the adsorption pressure is very small, maintaining the stability of the system. This result shows that the precisely calculated pressure regulation enables the equipment to maintain its performance under slightly changing environments, ensuring treatment efficiency and safety.

[0101] See also Figure 4 ,The steps to evaluate the deviation of real-time data from preset parameters are:

[0102] S211: Based on the environmental parameter adjustment instruction, real-time data of the PSA hydrogen extraction device is collected, including key parameters of temperature, pressure and flow rate, to obtain a real-time data set;

[0103] Based on the environmental parameter adjustment instructions, appropriate sensors and installation locations are selected to ensure that key operating data of the PSA hydrogen extraction device, such as temperature, pressure and flow rate, can be accurately collected. Data collection requires the configuration of high-precision sensors, and the data is sent to the central control platform in real time through the network. The central control platform analyzes the data in real time, compares the deviation between the actual operating data and the preset parameters, and obtains a real-time data set. Accurate collection and instant analysis of real-time data are crucial to ensuring that the equipment operates according to the predetermined parameters, and provides a basis for rapid response adjustments.

[0104] S212: Based on the real-time data set, the real-time data is compared with preset parameters, including temperature standard, pressure standard and flow rate standard, and the deviation between the actual data and the preset data is analyzed to generate real-time deviation information;

[0105] Based on the real-time data set, each key parameter collected is compared and analyzed one by one, the specific difference between each parameter and the preset value is calculated, and it is evaluated whether the difference is within the allowable operating deviation range. All deviations outside the range will be marked and an alarm will be generated, generating real-time deviation information. Deviation information is an important basis for the operation team to judge the operating status of the device and decide whether adjustments are needed, helping team members to quickly and accurately understand the operating status of the equipment and take corresponding measures.

[0106] S213: Based on the real-time deviation information, the formula:

[0107] ;

[0108] Calculate the operation deviation index and obtain real-time deviation analysis results;

[0109] in, is the running deviation index, represents the actual parameter, Represents preset parameters.

[0110] formula:

[0111]

[0112] The benefit of the formula is that it provides a unified standard for quantifying device operating deviations, and enhances sensitivity to large deviation values ​​in the form of a sum of squares, allowing the operating team to promptly identify and adjust operating conditions that deviate particularly far from preset parameters, helping to maintain equipment operation under optimal working conditions and prevent potential operational risks.

[0113] Detailed explanation of the formula and the process of formula calculation: The pressure value monitored in real time kPa, The preset standard pressure value kPa, substitute into the formula: .

[0114] The results show that the pressure parameters of the current system are only slightly higher than the preset values, and the deviation index is very small, indicating that the system is basically in a stable state. This result shows that by continuously monitoring and comparing the preset parameters through the monitoring system, the equipment parameters can be adjusted in real time to ensure continuous optimization of system performance.

[0115] See also Figure 5 , the steps for obtaining the adjusted running status information are:

[0116] S221: Based on the real-time deviation analysis result, the operation deviation index is compared with the preset deviation standard to determine whether the pressure and hydrogen flow rate of the adsorption tower need to be adjusted, and the pressure and flow rate adjustment requirement information is obtained;

[0117] Based on the real-time deviation analysis results, the difference between the actual working pressure and the set pressure of the adsorption tower is evaluated, and the real-time data of the hydrogen flow rate is monitored synchronously. The operation deviation index is compared with the preset deviation standard to determine whether the pressure and hydrogen flow rate of the adsorption tower need to be adjusted, providing a basis for fine-tuning operations. The entire process strictly relies on the feedback mechanism of the control system to ensure real-time update and precise regulation of all data;

[0118] S222: Adjust demand information based on pressure and flow rate, through the formula:

[0119] ;

[0120] Calculate the optimized parameters;

[0121] in, represents the optimized parameters, Indicates the current operating parameters. is the target parameter, is the adjustment factor, is the running deviation index;

[0122] formula:

[0123] ;

[0124] : Current operating parameter, such as pressure or flow rate. : Target parameters, ideal operating parameters set according to equipment performance and safety standards. :The adjustment coefficient is set based on past adjustment experience to control the adjustment range. : Operation deviation index, reflecting the deviation between the current parameters and the target parameters.

[0125] Formula calculation process: Setting current operating parameters is 50 units, the target parameter For 60 units, the adjustment factor is 0.1, running deviation index is 1.2.

[0126] calculate unit.

[0127] Calculate the total adjustment: unit.

[0128] Calculate new operating parameters: unit.

[0129] The calculation method dynamically combines actual operation data with preset targets to achieve precise adjustment of equipment operating parameters, optimize equipment operation efficiency and reduce energy consumption. Indicates optimized operating parameters, which help achieve the best operating status of the equipment.

[0130] S223: Based on the optimized parameters, adjust the control valve to modify the hydrogen flow rate, and adjust the output of the pressure pump to verify that the pressure and flow rate of the adsorption tower reach the ideal state, and obtain the adjusted operating parameters;

[0131] Based on the optimized parameters, the pressure and hydrogen flow rate of the adsorption tower are automatically adjusted. The adjustment is usually achieved by modifying the relevant settings in the control system, such as adjusting the valve opening or changing the operating speed of the pump. The fine-tuning measures are to achieve better gas purification effects and energy efficiency ratios. During the adjustment process, the operator needs to closely observe the effects of system feedback to ensure that each adjustment can gradually enable the equipment to approach or reach the optimal operating state. The goal is to achieve or exceed the predetermined production and safety indicators through continuous optimization iterations.

[0132] See also Figure 6 , the steps to identify the changing trend of the concentration of impurities during adsorption are:

[0133] S311: Based on the adjusted operation status information, the gas quality monitor interface is configured to match the output end of the PSA device, and the hydrogen purity is monitored in real time through the monitor to obtain real-time hydrogen purity data;

[0134] Based on the adjusted operating status information, the gas quality monitor connected to the PSA device starts real-time monitoring. After ensuring that the interface of the PSA device matches the gas quality monitor, data transmission between the devices is achieved through precise installation and debugging. In the process, standardized data interface protocols are used to ensure the accuracy and real-time nature of the data. The stable connection of the interface lays the foundation for subsequent data collection. By implementing a real-time monitoring system on the device side, it is ensured that the data obtained from the gas quality monitor is real-time and accurate. The collected data includes changes in hydrogen purity and concentration of impure substances. The data will be used for subsequent analysis and processing.

[0135] S312: Based on real-time hydrogen purity data, the formula:

[0136] ;

[0137] Calculate the concentration change trend index of impure substances to obtain concentration change trend information;

[0138] in, Indicates the concentration trend index of impure substances. and Represent the concentration change values ​​at the current and previous moments, respectively. Indicates the time interval, is the adjustment factor.

[0139] formula:

[0140] ;

[0141] The benefit of the formula is that it allows for rapid response to environmental changes, improves adjustment accuracy, and effectively controls purity within a reasonable range, which has a direct positive impact on the efficiency and output quality of the entire system.

[0142] Detailed explanation of the formula and the process of formula calculation: Use the improved formula to calculate the rate of change of the concentration of impure substances and set the time interval Hours, concentration changes before and after and , adjustment coefficient .calculate .

[0143] The results showed that the concentration of the impure substance changed at a rate of 0.015 units per hour.

[0144] See also Figure 7 , the steps to obtain the optimized purity control results are:

[0145] S321: Based on the concentration trend information, the formula:

[0146] ;

[0147] Calculate the adjusted adsorption time;

[0148] in, is the adjusted adsorption time, is the standard adsorption time, is the impure substance concentration change trend index, is the adjustment factor;

[0149] formula:

[0150] ;

[0151] The benefit of the formula is that it can flexibly adjust the adsorption time according to the change of the concentration of impurities, so as to more accurately control the purity of hydrogen to meet the high standards required for industrial applications. Through this formula, you can intuitively see how the increase in the concentration of impurities systematically affects the duration of the adsorption process. Formula explanation and formula calculation derivation process: Standard adsorption time :The standard adsorption time of the equipment is set to 100 minutes, which is based on past operating data and the manufacturer's recommendations. Impurity concentration trend index :Through the real-time monitoring system, if the concentration of impure substances in the current hydrogen sample increases by 20% compared with the previous cycle, then Adjustment factor : Based on past experience and equipment performance, it is set to 0.05. The coefficient reflects the sensitivity of the adsorption time adjustment to the increase in impurity concentration. Calculate the adjusted adsorption time: ;

[0152] The adjusted adsorption time is approximately 100.91 minutes. This result shows that with a slight increase in the concentration of impure substances, the adjustment of the adsorption time ensures that the purity of the hydrogen can reach the required industrial standards, thereby effectively controlling quality fluctuations in the production process.

[0153] S322: based on the adjusted adsorption time, resetting the operating parameters of the PSA equipment, carrying out the actual adsorption process, and monitoring the hydrogen purity again to check whether the hydrogen purity meets the standard requirements, and obtaining an optimized purity control result;

[0154] Based on the adjusted adsorption time, the operating parameters of the PSA equipment are updated and a new operating cycle is implemented. The purity of the hydrogen is monitored again to verify whether the adjustment of the adsorption time has achieved the expected effect. A real-time feedback mechanism is used to adjust the operating parameters to adapt to actual production conditions. The optimized hydrogen purity results ensure that the hydrogen products can meet strict quality standards. The execution of the process depends on precise time control and the effective use of real-time data to achieve dual optimization of production efficiency and product quality.

[0155] See also Figure 8 , the steps to obtain the product hydrogen quality assurance results are:

[0156] S411: Based on the optimized purity control results, the quality monitor connected to the PSA equipment collects hydrogen samples in real time to detect the current hydrogen purity, using the formula:

[0157] ;

[0158] Calculate the purity fluctuation index;

[0159] in, is the purity fluctuation index, is the standard deviation of the hydrogen purity samples, is the average purity of the sample;

[0160] formula:

[0161] ;

[0162] The benefit of the formula is that by converting the ratio of the standard deviation of hydrogen purity to the average value into a percentage, it can intuitively reflect the degree of fluctuation of hydrogen purity, which is crucial for quality control. If the fluctuation index is too high, it means that the purity is unstable and the production process may need to be adjusted to improve product quality. Formula explanation and formula calculation derivation process: Set the hydrogen purity sample values ​​measured in a cycle to 98.5%, 99.0%, 98.8%, 99.2%, and 98.9%, and calculate the average value and standard deviation , then the purity fluctuation index The results show that the fluctuation of hydrogen purity is very small during the investigation period. It can be considered that the production process is stable and the hydrogen quality meets the standards.

[0163] S412: Based on the purity fluctuation index, the purity is compared with the preset standard to determine whether the purity meets the preset standard, and the qualified hydrogen is output through the product pipeline to obtain the product hydrogen quality assurance result;

[0164] Based on the calculated purity fluctuation index, evaluate whether the purity of hydrogen meets the preset quality standards. If the purity fluctuation index is lower than the maximum allowable value, the hydrogen quality is confirmed to be qualified. Then, the qualified hydrogen is transported to the next production link through the product pipeline through the control system command. The process includes automatic control of the switch valve, pressure regulation of the pipeline and real-time monitoring of the flow rate to ensure that only qualified hydrogen can be finally output, thereby ensuring the quality and safety of the product hydrogen.

[0165] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A novel start-up method for a PSA hydrogen extraction device, characterized in that: The following steps are involved: S1: Based on the working environment of the PSA hydrogen extraction device, a pre-operation inspection is carried out, and nitrogen replacement is performed to control the oxygen content of the hydrogen extraction system within the preset range, and the pressure of the hydrogen extraction system is reduced to normal pressure. The difference between the current environmental data and the standard environmental data is analyzed, the valve opening and adsorption pressure are adjusted, the equipment operating parameters are optimized to meet the current environmental conditions, and the environmental parameter adjustment instructions are obtained; S2: Based on the environmental parameter adjustment instruction, monitor the real-time data of the PSA hydrogen extraction device, evaluate the deviation between the real-time data and the preset parameters, and make fine adjustments according to the feedback of the control strategy, including adjusting the pressure setting and hydrogen flow rate of the adsorption tower to obtain the adjusted operation status information; S3: Based on the adjusted operation status information, a gas quality monitor connected to the output end of the PSA device collects the purity data of hydrogen in real time, identifies the change trend of the concentration of impure substances during the adsorption process, adjusts the adsorption time according to the change trend of the concentration of impure substances, optimizes the hydrogen purity to meet the standard requirements, and obtains the optimized purity control result; S4: Based on the optimized purity control result, monitor the purity of the product hydrogen, verify that the hydrogen purity reaches the preset standard, analyze the volatility of the hydrogen purity, evaluate whether the output hydrogen quality is qualified, output the qualified hydrogen through the product pipeline, and obtain the product hydrogen quality assurance result.

2. The novel start-up method for a PSA hydrogen extraction device according to claim 1, characterized in that: The steps of analyzing the difference between the current environment data and the standard environment data are as follows: S111: Based on the working environment of the PSA hydrogen extraction device, an environmental sensor is set to collect real-time temperature, humidity and pressure data to obtain an environmental monitoring data set; S112: extracting set standard environmental parameters from the system database, including standard temperature, standard humidity and standard pressure, to obtain a standard environmental data set; S113: Based on the environmental monitoring data set and the standard environmental data set, the formula: ； Calculate the environmental deviation index and obtain the environmental deviation analysis results; in, is the actual measured temperature, is the standard temperature, is the actual measured humidity, is the standard humidity, is the actual measured pressure, is the standard pressure, , and is the weight coefficient.

3. The novel start-up method for a PSA hydrogen extraction device according to claim 2, characterized in that: The steps for obtaining the environmental parameter adjustment instruction are: S121: Based on the environmental deviation analysis result, the actual valve opening data is compared with the preset valve opening data, the opening difference that needs to be adjusted is determined, and the valve opening is adjusted in real time to obtain the adjusted valve opening data; S122: Based on the adjusted valve opening data and the environmental deviation analysis result, the formula: ； Calculate the adjusted adsorption pressure and obtain the environmental parameter adjustment instruction; in, is the adjusted adsorption pressure, is the current adsorption pressure of the device, is the environmental deviation index, is the adjustment coefficient.

4. The novel start-up method for a PSA hydrogen extraction device according to claim 1, characterized in that: The steps of evaluating the deviation between the real-time data and the preset parameters are: S211: Based on the environmental parameter adjustment instruction, real-time data of the PSA hydrogen extraction device is collected, including key parameters of temperature, pressure and flow rate, to obtain a real-time data set; S212: Based on the real-time data set, compare with preset parameters, including temperature standard, pressure standard and flow rate standard, analyze the deviation between the actual data and the preset data, and generate real-time deviation information; S213: Based on the real-time deviation information, the formula: ； Calculate the operation deviation index and obtain real-time deviation analysis results; in, is the running deviation index, represents the actual parameter, Represents preset parameters.

5. The novel start-up method for a PSA hydrogen extraction device according to claim 4, characterized in that: The steps for obtaining the adjusted running status information are as follows: S221: Based on the real-time deviation analysis result, the operation deviation index is compared with a preset deviation standard to determine whether the pressure and hydrogen flow rate of the adsorption tower need to be adjusted, and pressure and flow rate adjustment requirement information is obtained; S222: Based on the pressure and flow rate adjustment demand information, the formula is: ； Calculate the optimized parameters; in, represents the optimized parameters, Indicates the current operating parameters. is the target parameter, is the adjustment factor, is the running deviation index; S223: Based on the optimized parameters, adjust the control valve to modify the hydrogen flow rate, and adjust the output of the pressure pump to verify that the pressure and flow rate of the adsorption tower reach the ideal state, and obtain the adjusted operating parameters.

6. The novel start-up method for a PSA hydrogen extraction device according to claim 1, characterized in that: The steps of identifying the changing trend of the concentration of impure substances during the adsorption process are: S311: Based on the adjusted operation status information, configure the gas quality monitor interface to match the output end of the PSA device, monitor the hydrogen purity in real time through the monitor, and obtain real-time hydrogen purity data; S312: Based on the real-time hydrogen purity data, the formula: ； Calculate the concentration change trend index of impure substances to obtain concentration change trend information; in, Indicates the concentration trend index of impure substances. and Represent the concentration change values ​​at the current and previous moments, respectively. Indicates the time interval, is the adjustment factor.

7. The novel start-up method for a PSA hydrogen extraction device according to claim 6, characterized in that: The steps for obtaining the optimized purity control result are: S321: Based on the concentration change trend information, the formula: ； Calculate the adjusted adsorption time; in, is the adjusted adsorption time, is the standard adsorption time, is the impure substance concentration change trend index, is the adjustment factor; S322: Based on the adjusted adsorption time, the operating parameters of the PSA equipment are reset to carry out the actual adsorption process, and the hydrogen purity is monitored again to check whether the hydrogen purity meets the standard requirements, so as to obtain an optimized purity control result.

8. The novel start-up method for a PSA hydrogen extraction device according to claim 1, characterized in that: The steps for obtaining the product hydrogen quality assurance results are: S411: Based on the optimized purity control result, a hydrogen sample is collected in real time through a quality monitor connected to the PSA device to detect the current hydrogen purity, and the formula is: ； Calculate the purity fluctuation index; in, is the purity fluctuation index, is the standard deviation of the hydrogen purity samples, is the average purity of the sample; S412: Based on the purity fluctuation index, the purity is compared with the preset standard to determine whether the purity meets the preset standard, and the qualified hydrogen is output through the product pipeline to obtain the product hydrogen quality assurance result.

Images