Method and system for monitoring trace substances in a hydrogen purification process

Abstract

The application relates to the technical field of hydrogen purification, and discloses a method and system for monitoring and processing trace substances in a hydrogen purification process.The method comprises the following steps: constructing a standard trace substance change coordinate system set according to standard trace substance change data; performing similarity matching on the standard trace substance change coordinate system set by using a real-time trace substance change curve set to obtain a real-time similar standard change curve set; identifying target purification process parameters corresponding to the real-time similar standard change curve set; performing pressure swing adsorption according to the target purification process parameters and judging whether hydrogen purification is completed; if not, judging whether the real-time similar standard change curve set is replaced; if not, continuing to perform pressure swing adsorption and judging whether hydrogen purification is completed; if the real-time similar standard change curve set is replaced, reacquiring the real-time trace substance change curve set; and if hydrogen purification is completed, stopping hydrogen purification.The application can solve the problem of poor purification effect in the current hydrogen purification process.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen purification, and in particular to a method and system for monitoring and processing trace substances in a hydrogen purification process. Background Art

[0002] In the process of producing hydrogen from ammonia, hydrogen purification is a crucial step. The hydrogen produced by the decomposition of ammonia often contains trace impurities such as water vapor, oxygen, carbon monoxide, and nitrogen. The presence of these impurities can seriously affect the purity of the hydrogen and its subsequent application. Therefore, effective monitoring and treatment methods must be implemented to ensure hydrogen purity.

[0003] Currently, pressure swing adsorption (PSA) technology is mainly used to purify hydrogen. However, during the PSA process, the adsorption parameters of the PSA are not adaptively controlled according to changes in trace impurities. Therefore, the current process of using PSA technology to purify hydrogen suffers from poor purification effect.

[0004] Existing technologies, such as the one titled "A Method and System for Online Monitoring and Real-Time Optimization of a Refining Hydrogen System," with application number CN202410044960.1, disclose that the method includes: obtaining operating parameters of the hydrogen production unit, hydrogen consumption unit, and hydrogen purification unit in the hydrogen system, as well as raw material analysis data, product analysis data, and hydrogen-containing gas data; using data preprocessing to perform data correction and temperature and pressure compensation on the obtained operating parameters; inputting the corrected and temperature-compensated operating parameters and data obtained from the laboratory information management system database into pre-established models of the corresponding hydrogen production unit, hydrogen consumption unit, hydrogen purification unit, and various levels of pipeline network models of the hydrogen system to obtain online monitoring simulation calculation data for the hydrogen system; and using a system optimization algorithm to solve the pre-established online monitoring and optimization model based on the online monitoring simulation calculation data to obtain online optimization calculation data for the hydrogen system. This method requires the establishment of multiple models, is complex and costly, and does not consider the impact of various trace impurities. Summary of the Invention

[0005] The present invention provides a method and system for monitoring and treating trace substances in a hydrogen purification process, the main purpose of which is to solve the problem of poor purification effect in the process of hydrogen purification in the prior art.

[0006] To achieve the above objectives, the present invention provides a method for monitoring and treating trace substances in a hydrogen purification process, comprising:

[0007] Obtaining a standard hydrogen purification data set, wherein the standard hydrogen purification data set refers to a collection of standard purification process parameters, standard trace substance change data, and standard hydrogen purification index values ​​during each hydrogen purification operation, wherein the standard purification process parameters refer to standard adsorption pressure, standard adsorption time, and standard adsorption temperature; the standard trace substance change data refer to standard nitrogen concentration change data, standard water vapor content change data, standard oxygen concentration change data, and standard carbon monoxide concentration change data; and the standard hydrogen purification index values ​​refer to standard hydrogen extraction purity and standard hydrogen extraction efficiency;

[0008] Constructing a standard trace substance change coordinate system set according to the standard trace substance change data, wherein the standard trace substance change coordinate system set refers to a standard nitrogen concentration change coordinate system, a standard water vapor content change coordinate system, a standard oxygen concentration change coordinate system, and a standard carbon monoxide concentration change coordinate system;

[0009] Obtaining a real-time trace substance change curve set, wherein the real-time trace substance change curve set refers to a real-time nitrogen concentration change curve, a real-time water vapor content change curve, a real-time oxygen concentration change curve, and a real-time carbon monoxide concentration change curve within a unit time from the current moment;

[0010] Performing similarity matching on the standard trace substance change coordinate system using the real-time trace substance change curve set to obtain a real-time similar standard change curve set;

[0011] Identifying target purification process parameters corresponding to the real-time similarity standard change curve set, wherein the target purification process parameters refer to target adsorption pressure, target adsorption time, and target adsorption temperature;

[0012] Performing pressure swing adsorption on the preset trace substances according to the target purification process parameters and determining whether hydrogen purification is completed;

[0013] If the hydrogen purification is not completed, determining whether the real-time similarity standard change curve set has been replaced;

[0014] If the real-time similarity standard change curve set has not been replaced, returning to the above step of performing pressure swing adsorption on the preset trace substances according to the target purification process parameters and determining whether hydrogen purification is completed;

[0015] If the real-time similar standard change curve set is replaced, return to the above step of obtaining the real-time trace substance change curve set;

[0016] If the hydrogen purification is completed, the monitoring and processing of trace substances in the hydrogen purification process will be stopped.

[0017] Optionally, constructing a standard trace substance change coordinate system set according to the standard trace substance change data includes:

[0018] Performing point fitting in a pre-constructed nitrogen concentration change coordinate system according to the standard nitrogen concentration change data to obtain a standard nitrogen concentration change coordinate system, wherein the horizontal axis of the nitrogen concentration change coordinate system is the time axis and the vertical axis is the nitrogen concentration;

[0019] Performing point fitting in a pre-constructed water vapor content change coordinate system according to the standard water vapor content change data to obtain a standard water vapor content change coordinate system, wherein the horizontal axis of the water vapor content change coordinate system is the time axis and the vertical axis is the water vapor content;

[0020] Performing point fitting in a pre-constructed oxygen concentration change coordinate system according to the standard oxygen concentration change data to obtain a standard oxygen concentration change coordinate system, wherein the horizontal axis of the oxygen concentration change coordinate system is the time axis and the vertical axis is the oxygen concentration;

[0021] Performing point fitting in a pre-constructed carbon monoxide concentration change coordinate system according to the standard carbon monoxide concentration change data to obtain a standard carbon monoxide concentration change coordinate system, wherein the horizontal axis of the carbon monoxide concentration change coordinate system is the time axis and the vertical axis is the carbon monoxide concentration;

[0022] The standard nitrogen concentration change coordinate system, the standard water vapor content change coordinate system, the standard oxygen concentration change coordinate system and the standard carbon monoxide concentration change coordinate system are collected to obtain a standard trace substance change coordinate system set.

[0023] Optionally, obtaining a real-time trace substance change curve set includes:

[0024] Obtain real-time nitrogen concentration, real-time water vapor content, real-time oxygen concentration and real-time carbon monoxide concentration;

[0025] According to the real-time nitrogen concentration, real-time water vapor content, real-time oxygen concentration and real-time carbon monoxide concentration, respectively draw a real-time nitrogen concentration change curve, a real-time water vapor content change curve, a real-time oxygen concentration change curve and a real-time carbon monoxide concentration change curve;

[0026] Get the current time, and define the real-time curve interception period based on the preset unit time and the current time;

[0027] According to the real-time curve interception time period, a unit real-time nitrogen change curve, a unit real-time water vapor change curve, a unit real-time oxygen change curve and a unit real-time carbon monoxide change curve are respectively intercepted from the real-time nitrogen concentration change curve, the real-time water vapor content change curve, the real-time oxygen concentration change curve and the real-time carbon monoxide concentration change curve;

[0028] The unit real-time nitrogen change curve, the unit real-time water vapor change curve, the unit real-time oxygen change curve and the unit real-time carbon monoxide change curve are collected to obtain a real-time trace substance change curve set.

[0029] Optionally, performing similarity matching on the standard trace substance change coordinate system using the real-time trace substance change curve set to obtain a real-time similar standard change curve set includes:

[0030] sequentially extracting real-time trace substance change curves from the real-time trace substance change curve set, and extracting associated trace substance change coordinate systems corresponding to the real-time trace substance change curves from the standard trace substance change coordinate system set;

[0031] Identifying a substance change starting value, a substance change integral value, a substance change ending value, and a substance change ending slope of the real-time trace substance change curve;

[0032] Identify a real-time similar standard change curve in the associated trace substance change coordinate system according to the substance change starting value, substance change integral value, substance change ending value, and substance change ending slope;

[0033] The real-time similar standard change curves corresponding to the real-time trace substance change curves are collected to obtain a real-time similar standard change curve set.

[0034] Optionally, the identifying of the substance change starting value, substance change integral value, substance change ending value and substance change ending slope of the real-time trace substance change curve includes:

[0035] Identifying a substance change value corresponding to a starting endpoint of the real-time trace substance change curve, and using the substance change value corresponding to the starting endpoint as a substance change starting value;

[0036] Integrating the real-time trace substance change curve to obtain a substance change integral value;

[0037] Identifying a substance change value corresponding to a termination endpoint of the real-time trace substance change curve, and using the substance change value corresponding to the termination endpoint as a substance change termination value;

[0038] The slope of the termination endpoint is calculated and used as the termination slope of the material change.

[0039] Optionally, the identifying a real-time similar standard change curve in the associated trace substance change coordinate system according to the substance change starting value, the substance change integral value, the substance change ending value, and the substance change ending slope includes:

[0040] Calculating a substance starting matching interval according to the substance change starting value and a preset starting screening distance value, wherein the substance starting matching interval is an interval consisting of the substance change starting value minus the starting screening distance value and the substance change starting value plus the starting screening distance value;

[0041] Calculating a material integral matching interval based on the material change integral value and a preset integral screening distance value, wherein the material integral matching distance interval is equal to an interval consisting of the material change integral value minus the integral screening distance value and the material change integral value plus the integral screening distance value;

[0042] Calculating a material termination matching interval according to the material change termination value and a preset termination screening distance value, wherein the material termination matching interval is equal to an interval consisting of the material change termination value minus the termination screening distance value and the material change termination value plus the termination screening distance value;

[0043] Calculating a material termination slope matching interval based on the material change termination slope and a preset slope screening distance value, wherein the material termination slope matching interval is equal to an interval consisting of the material change termination slope minus the slope screening distance value and the material change termination slope plus the slope screening distance value;

[0044] Performing a primary screening in the associated trace substance change coordinate system according to the substance starting matching interval, substance integral matching interval, substance ending matching interval, and substance ending slope matching interval to obtain a primary similarity standard change curve set;

[0045] A real-time similarity standard change curve is identified in the initial similarity standard change curve set according to the material change starting value, the material change integral value, the material change ending value, the material change ending slope and a preset matching formula.

[0046] Optionally, the matching formula is as follows:

[0047]

[0048] Among them, ε i k represents the curve difference value between the i-th primary similar standard change curve in the primary similar standard change curve set and the real-time trace substance change curve, q Indicates the starting matching weight, y q Indicates the starting value of the material change of the real-time trace material change curve. Indicates the starting value of the material change of the i-th initial similar standard change curve, k j Indicates the integral matching weight, y j Indicates the material change integral value of the real-time trace material change curve, represents the integral value of the material change of the i-th initial similar standard change curve, kz Represents the termination matching weight, y z Indicates the material change termination value of the real-time trace material change curve. Indicates the end value of the material change of the i-th initial similar standard change curve, k x represents the slope matching weight, y x Indicates the termination slope of the material change of the real-time trace material change curve, It represents the termination slope of the substance change of the i-th initial similarity standard change curve.

[0049] Optionally, identifying the target purification process parameter corresponding to the real-time similarity standard change curve set includes:

[0050] sequentially extracting real-time similarity standard change curves from the real-time similarity standard change curve set;

[0051] Identifying similar purification process parameters corresponding to the real-time similar standard change curve to obtain a similar purification process parameter set;

[0052] Determining whether the similar purification process parameter set contains the same similar purification process parameters;

[0053] If there are no identical similar purification process parameters in the similar purification process parameter set, the target purification process parameters are calculated using the following formula:

[0054]

[0055] Where, f represents the target adsorption pressure, They represent the adsorption pressure, adsorption time and adsorption temperature corresponding to the real-time similar standard change curve in the standard nitrogen concentration change coordinate system, and They represent the adsorption pressure, adsorption time and adsorption temperature corresponding to the real-time similar standard change curve in the standard water vapor content change coordinate system, and They represent the adsorption pressure, adsorption time and adsorption temperature corresponding to the real-time similar standard change curve in the standard oxygen concentration change coordinate system, respectively. CO , t CO and w CO They respectively represent the adsorption pressure, adsorption time and adsorption temperature corresponding to the real-time similar standard change curve in the standard carbon monoxide concentration change coordinate system, t represents the target adsorption time, and w represents the target adsorption temperature;

[0056] If the similar purification process parameter set contains identical similar purification process parameters, the identical similar purification process parameters are used as target purification process parameters.

[0057] Optionally, the determining whether the real-time similarity standard change curve set has been replaced includes:

[0058] Using the real-time similar standard change curve set as a historical similar standard change curve set and obtaining a real-time trace substance change curve set;

[0059] Obtaining a real-time similar standard change curve set of the real-time trace substance change curve set;

[0060] Determining whether the real-time similarity standard change curve set is consistent with the historical similarity standard change curve set;

[0061] If the real-time similarity standard change curve set is consistent with the historical similarity standard change curve set, then the real-time similarity standard change curve set has not been replaced;

[0062] If the real-time similarity standard change curve set is inconsistent with the historical similarity standard change curve set, the real-time similarity standard change curve set is replaced.

[0063] To achieve the above object, the present invention further provides a monitoring and processing system for trace substances in a hydrogen purification process, comprising:

[0064] a standard trace substance change coordinate system set construction module, for obtaining a standard hydrogen purification data set, wherein the standard hydrogen purification data set refers to a set of standard purification process parameters, standard trace substance change data, and standard hydrogen purification index values ​​during each hydrogen purification operation, wherein the standard purification process parameters refer to standard adsorption pressure, standard adsorption time, and standard adsorption temperature, the standard trace substance change data refer to standard nitrogen concentration change data, standard water vapor content change data, standard oxygen concentration change data, and standard carbon monoxide concentration change data, and the standard hydrogen purification index value refers to standard hydrogen extraction purity and standard hydrogen extraction efficiency; constructing a standard trace substance change coordinate system set based on the standard trace substance change data, wherein the standard trace substance change coordinate system set refers to a standard nitrogen concentration change coordinate system, a standard water vapor content change coordinate system, a standard oxygen concentration change coordinate system, and a standard carbon monoxide concentration change coordinate system;

[0065] A real-time similar standard change curve set matching module is used to obtain a real-time trace substance change curve set, wherein the real-time trace substance change curve set refers to a real-time nitrogen concentration change curve, a real-time water vapor content change curve, a real-time oxygen concentration change curve, and a real-time carbon monoxide concentration change curve within a unit time from the current moment; and the real-time trace substance change curve set is used to perform similarity matching in the standard trace substance change coordinate system to obtain a real-time similar standard change curve set;

[0066] a pressure swing adsorption module, configured to identify target purification process parameters corresponding to the real-time similarity standard change curve set, wherein the target purification process parameters refer to target adsorption pressure, target adsorption time, and target adsorption temperature; perform pressure swing adsorption on preset trace substances according to the target purification process parameters, and determine whether hydrogen purification is completed;

[0067] A loop judgment module is used to determine whether the real-time similarity standard change curve set has been replaced if hydrogen purification has not been completed; if the real-time similarity standard change curve set has not been replaced, return to the above-mentioned step of performing pressure swing adsorption on the preset trace substances according to the target purification process parameters and determine whether hydrogen purification is completed; if the real-time similarity standard change curve set has been replaced, return to the above-mentioned step of obtaining the real-time trace substance change curve set; if hydrogen purification is completed, stop monitoring and processing of trace substances during the hydrogen purification process.

[0068] In order to solve the above problem, the present invention further provides an electronic device, comprising:

[0069] A memory storing at least one instruction; and a processor executing the instruction stored in the memory to implement the above-mentioned method for monitoring and processing trace substances in the hydrogen purification process.

[0070] In order to solve the above problems, the present invention also provides a computer-readable storage medium, which stores at least one instruction, and the at least one instruction is executed by a processor in an electronic device to implement the above-mentioned method for monitoring and processing trace substances in the hydrogen purification process.

[0071] In order to solve the problems described in the background technology, the present invention first constructs a standard trace substance change coordinate system set. In the process of constructing the standard trace substance change coordinate system set, it is necessary to first obtain a standard hydrogen purification data set, and then construct a standard trace substance change coordinate system set based on the standard trace substance change data. At this time, similarity matching can be performed based on the standard trace substance change coordinate system set. Before performing similarity matching, it is necessary to first obtain a real-time trace substance change curve set, and then use the real-time trace substance change curve set to perform similarity matching in the standard trace substance change coordinate system set to obtain a real-time similar standard change curve set.

[0072] Since the real-time similar standard change curve set corresponds to the standard adsorption pressure, standard adsorption time and standard adsorption temperature, and the real-time similar standard change curve set is the most similar to the real-time trace substance change curve set, the target purification process parameters corresponding to the real-time similar standard change curve set can be identified, and then the preset trace substances are pressure-swing adsorption is performed according to the target purification process parameters to determine whether the hydrogen purification is completed. If the hydrogen purification is not completed, it is determined whether the real-time similar standard change curve set has been replaced. If the real-time similar standard change curve set has not been replaced, the corresponding target purification process parameters can continue to be used. Therefore, the above-mentioned step of pressure-swing adsorption of the preset trace substances according to the target purification process parameters and determining whether the hydrogen purification is completed can be returned. If the real-time similar standard change curve set has been replaced, similarity matching needs to be re-performed, and the above-mentioned step of obtaining the real-time trace substance change curve set needs to be returned. If the hydrogen purification is completed, the monitoring and processing of trace substances during the hydrogen purification process is stopped. The monitoring method of the present invention is simple and practical, suitable for industrial large-scale hydrogen purification production, has a high degree of system intelligence, a complete database, and realizes intelligent remote control.

[0073] The present invention can solve the problem of poor purification effect in the process of purifying hydrogen in the existing technology. The monitoring and treatment process comprehensively considers the influence of various trace impurities. Through testing, the purification rate of the produced hydrogen is 2-4% higher than that of the existing technology, the trace impurities are reduced to below 0.1%, and the purified hydrogen is of excellent quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] Figure 1 A schematic flow chart of a method for monitoring and treating trace substances in a hydrogen purification process according to one embodiment of the present invention;

[0075] Figure 2 A functional module diagram of a system for monitoring and processing trace substances in a hydrogen purification process according to one embodiment of the present invention;

[0076] Figure 3 A schematic structural diagram of an electronic device for implementing a method for monitoring and processing trace substances in the hydrogen purification process provided by one embodiment of the present invention.

[0077] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0078] 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.

[0079] The embodiment of the present application provides a kind of trace material monitoring processing method in hydrogen purification process.The execution subject of the trace material monitoring processing method in hydrogen purification process includes but is not limited to at least one of the electronic equipment that can be configured to execute the method provided by the embodiment of the present application, such as server, terminal and the like.In other words, the trace material monitoring processing method in hydrogen purification process can be executed by software or hardware installed in terminal device or server device, and the software can be blockchain platform.The server includes but is not limited to: single server, server cluster, cloud server or cloud server cluster and the like.

[0080] Referring to Figure 1 As shown in the flowchart of the trace material monitoring processing method in hydrogen purification process provided by the embodiment of the present application.In this embodiment, the trace material monitoring processing method in hydrogen purification process includes:

[0081] S1, obtain standard hydrogen purification data set.

[0082] In detail, the standard hydrogen purification data set refers to the collection of standard purification process parameters, standard trace material change data and standard hydrogen purification index value when hydrogen purification is performed each time, the standard purification process parameters refer to standard adsorption pressure, standard adsorption time and standard adsorption temperature, the standard trace material change data refer to standard nitrogen concentration change data, standard water vapor content change data, standard oxygen concentration change data and standard carbon monoxide concentration change data, and the standard hydrogen purification index value refers to standard hydrogen extraction purity and standard hydrogen extraction efficiency.

[0083] As can be understood, the standard hydrogen purification data set refers to the data collection generated in the process of producing purified hydrogen by ammonia each time by technicians.

[0084] S2, construct standard trace material change coordinate system set according to the standard trace material change data.

[0085] As can be understood, the standard trace material change coordinate system set is the collection of standard trace material change coordinate systems constructed according to the change relationship of the standard trace material change data with time.

[0086] In detail, the standard trace material change coordinate system set refers to standard nitrogen concentration change coordinate system, standard water vapor content change coordinate system, standard oxygen concentration change coordinate system and standard carbon monoxide concentration change coordinate system.

[0087] The standard nitrogen concentration change coordinate system refers to a coordinate system that represents the relationship between standard nitrogen concentration change data and time. The standard water vapor content change coordinate system refers to a coordinate system that represents the relationship between standard water vapor content change data and time. The standard oxygen concentration change coordinate system refers to a coordinate system that represents the relationship between standard oxygen concentration change data and time. The standard carbon monoxide concentration change coordinate system refers to a coordinate system that represents the relationship between standard carbon monoxide concentration change data and time.

[0088] In an embodiment of the present invention, the step of constructing a standard trace substance change coordinate system set based on the standard trace substance change data includes:

[0089] Performing point fitting in a pre-constructed nitrogen concentration change coordinate system according to the standard nitrogen concentration change data to obtain a standard nitrogen concentration change coordinate system, wherein the horizontal axis of the nitrogen concentration change coordinate system is the time axis and the vertical axis is the nitrogen concentration;

[0090] Performing point fitting in a pre-constructed water vapor content change coordinate system according to the standard water vapor content change data to obtain a standard water vapor content change coordinate system, wherein the horizontal axis of the water vapor content change coordinate system is the time axis and the vertical axis is the water vapor content;

[0091] Performing point fitting in a pre-constructed oxygen concentration change coordinate system according to the standard oxygen concentration change data to obtain a standard oxygen concentration change coordinate system, wherein the horizontal axis of the oxygen concentration change coordinate system is the time axis and the vertical axis is the oxygen concentration;

[0092] Performing point fitting in a pre-constructed carbon monoxide concentration change coordinate system according to the standard carbon monoxide concentration change data to obtain a standard carbon monoxide concentration change coordinate system, wherein the horizontal axis of the carbon monoxide concentration change coordinate system is the time axis and the vertical axis is the carbon monoxide concentration;

[0093] The standard nitrogen concentration change coordinate system, the standard water vapor content change coordinate system, the standard oxygen concentration change coordinate system and the standard carbon monoxide concentration change coordinate system are collected to obtain a standard trace substance change coordinate system set.

[0094] S3. Obtain a real-time trace substance change curve set.

[0095] In detail, the real-time trace substance change curve set refers to the real-time nitrogen concentration change curve, the real-time water vapor content change curve, the real-time oxygen concentration change curve, and the real-time carbon monoxide concentration change curve within a unit time from the current moment.

[0096] Understandably, when the time period corresponding to the change curve in the standard nitrogen concentration change coordinate system is 0min-30min, the time period corresponding to the real-time nitrogen concentration change curve is 29min-30min. The unit time is 1min.

[0097] In the embodiment of the application, the set of real-time trace substance change curves comprises:

[0098] The real-time nitrogen concentration, the real-time water vapor content, the real-time oxygen concentration and the real-time carbon monoxide concentration are obtained.

[0099] The real-time nitrogen concentration change curve, the real-time water vapor content change curve, the real-time oxygen concentration change curve and the real-time carbon monoxide concentration change curve are respectively drawn according to the real-time nitrogen concentration, the real-time water vapor content, the real-time oxygen concentration and the real-time carbon monoxide concentration.

[0100] The current time is obtained, and the real-time curve interception period is determined according to the preset unit time and the current time.

[0101] The unit real-time nitrogen change curve, the unit real-time water vapor change curve, the unit real-time oxygen change curve and the unit real-time carbon monoxide change curve are intercepted in the real-time nitrogen concentration change curve, the real-time water vapor content change curve, the real-time oxygen concentration change curve and the real-time carbon monoxide concentration change curve respectively according to the real-time curve interception period.

[0102] The unit real-time nitrogen change curve, the unit real-time water vapor change curve, the unit real-time oxygen change curve and the unit real-time carbon monoxide change curve are collected to obtain a set of real-time trace substance change curves.

[0103] Understandably, the real-time curve interception period refers to a period with a starting time of the current time minus the unit time and an ending time of the current time, for example: when the current time is 10:30 and the unit time is 1min, the real-time curve interception period is 10:29-10:30.

[0104] S4, similarity matching is performed on the set of real-time trace substance change curves in the set of standard trace substance change curves to obtain a set of real-time similar standard change curves.

[0105] The set of real-time similar standard change curves refers to a set of curves most similar to the real-time nitrogen concentration change curve in the standard nitrogen concentration change coordinate system, the real-time water vapor content change curve in the standard water vapor content change coordinate system, the real-time oxygen concentration change curve in the standard oxygen concentration change coordinate system and the real-time carbon monoxide concentration change curve in the standard carbon monoxide concentration change coordinate system.

[0106] In an embodiment of the present invention, the method of performing similarity matching on the standard trace substance change coordinate system using the real-time trace substance change curve set to obtain a real-time similar standard change curve set includes:

[0107] sequentially extracting real-time trace substance change curves from the real-time trace substance change curve set, and extracting associated trace substance change coordinate systems corresponding to the real-time trace substance change curves from the standard trace substance change coordinate system set;

[0108] Identifying a substance change starting value, a substance change integral value, a substance change ending value, and a substance change ending slope of the real-time trace substance change curve;

[0109] Identify a real-time similar standard change curve in the associated trace substance change coordinate system according to the substance change starting value, substance change integral value, substance change ending value, and substance change ending slope;

[0110] The real-time similar standard change curves corresponding to the real-time trace substance change curves are collected to obtain a real-time similar standard change curve set.

[0111] It is understood that the associated trace substance change coordinate system refers to the standard trace substance change coordinate system corresponding to the real-time trace substance change curve. For example, when the real-time trace substance change curve is a real-time nitrogen concentration change curve, the associated trace substance change coordinate system is the standard nitrogen concentration change coordinate system. The substance change starting value refers to the substance change value corresponding to the starting point of the real-time trace substance change curve, the substance change integral value refers to the integral value of the real-time trace substance change curve with respect to time, the substance change ending value refers to the substance change value corresponding to the end point of the real-time trace substance change curve, and the substance change ending slope refers to the slope at the end point of the real-time trace substance change curve.

[0112] In an embodiment of the present invention, the identification of the substance change starting value, substance change integral value, substance change ending value, and substance change ending slope of the real-time trace substance change curve includes:

[0113] Identifying a substance change value corresponding to a starting endpoint of the real-time trace substance change curve, and using the substance change value corresponding to the starting endpoint as a substance change starting value;

[0114] Integrating the real-time trace substance change curve to obtain a substance change integral value;

[0115] Identifying a substance change value corresponding to a termination endpoint of the real-time trace substance change curve, and using the substance change value corresponding to the termination endpoint as a substance change termination value;

[0116] The slope of the termination endpoint is calculated and used as the termination slope of the material change.

[0117] In an embodiment of the present invention, the identifying of a real-time similar standard change curve in the associated trace substance change coordinate system according to the substance change starting value, the substance change integral value, the substance change ending value, and the substance change ending slope includes:

[0118] Calculating a substance starting matching interval according to the substance change starting value and a preset starting screening distance value, wherein the substance starting matching interval is an interval consisting of the substance change starting value minus the starting screening distance value and the substance change starting value plus the starting screening distance value;

[0119] Calculating a material integral matching interval based on the material change integral value and a preset integral screening distance value, wherein the material integral matching distance interval is equal to an interval consisting of the material change integral value minus the integral screening distance value and the material change integral value plus the integral screening distance value;

[0120] Calculating a material termination matching interval according to the material change termination value and a preset termination screening distance value, wherein the material termination matching interval is equal to an interval consisting of the material change termination value minus the termination screening distance value and the material change termination value plus the termination screening distance value;

[0121] Calculating a material termination slope matching interval based on the material change termination slope and a preset slope screening distance value, wherein the material termination slope matching interval is equal to an interval consisting of the material change termination slope minus the slope screening distance value and the material change termination slope plus the slope screening distance value;

[0122] Performing a primary screening in the associated trace substance change coordinate system according to the substance starting matching interval, substance integral matching interval, substance ending matching interval, and substance ending slope matching interval to obtain a primary similarity standard change curve set;

[0123] A real-time similarity standard change curve is identified in the initial similarity standard change curve set according to the material change starting value, the material change integral value, the material change ending value, the material change ending slope and a preset matching formula.

[0124] It is understandable that the starting screening distance value refers to half the distance value of the starting matching interval of the substance. For example, when the starting value of the substance change is 10 mol / m 3 The initial screening distance value is 3 mol / m 3 , then the initial matching interval of the substance is [7mol / m 3 , 13 mol / m 3The integral screening distance value refers to a half distance value of the integral matching interval of the substance, the terminal screening distance value refers to a half distance value of the terminal matching interval of the substance, and the slope screening distance value refers to a half distance value of the terminal slope matching interval of the substance.

[0125] In detail, the matching formula is as follows:

[0126]

[0127] wherein, ε i represents a curve difference value of the i th primary similar standard change curve in the primary similar standard change curve set and the real-time trace substance change curve, k q represents a starting matching weight, y q represents a substance change starting value of the real-time trace substance change curve, represents a substance change starting value of the i th primary similar standard change curve, k j represents an integral matching weight, y j represents a substance change integral value of the real-time trace substance change curve, represents a substance change integral value of the i th primary similar standard change curve, k z represents a terminal matching weight, y z represents a substance change terminal value of the real-time trace substance change curve, represents a substance change terminal value of the i th primary similar standard change curve, k x represents a slope matching weight, y x represents a substance change terminal slope of the real-time trace substance change curve, represents a substance change terminal slope of the i th primary similar standard change curve.

[0128] S5, identifying the target purification process parameters corresponding to the real-time similar standard change curve set.

[0129] In detail, the target purification process parameters refer to a target adsorption pressure, a target adsorption time and a target adsorption temperature. The target adsorption pressure refers to an adsorption pressure corresponding to the real-time similar standard change curve set, the target adsorption time refers to an adsorption time corresponding to the real-time similar standard change curve set, and the target adsorption temperature refers to an adsorption temperature corresponding to the real-time similar standard change curve set.

[0130] In the embodiment of the application, the identification of the target purification process parameters corresponding to the real-time similar standard change curve set comprises:

[0131] extracting real-time similar standard change curves in the real-time similar standard change curve set in sequence;

[0132] Identifying similar purification process parameters corresponding to the real-time similar standard change curve to obtain a similar purification process parameter set;

[0133] Determining whether the similar purification process parameter set contains the same similar purification process parameters;

[0134] If there are no identical similar purification process parameters in the similar purification process parameter set, the target purification process parameters are calculated using the following formula:

[0135]

[0136] Where, f represents the target adsorption pressure, They represent the adsorption pressure, adsorption time and adsorption temperature corresponding to the real-time similar standard change curve in the standard nitrogen concentration change coordinate system, and They represent the adsorption pressure, adsorption time and adsorption temperature corresponding to the real-time similar standard change curve in the standard water vapor content change coordinate system, and They represent the adsorption pressure, adsorption time and adsorption temperature corresponding to the real-time similar standard change curve in the standard oxygen concentration change coordinate system, respectively. CO , t CO and w CO They respectively represent the adsorption pressure, adsorption time and adsorption temperature corresponding to the real-time similar standard change curve in the standard carbon monoxide concentration change coordinate system, t represents the target adsorption time, and w represents the target adsorption temperature;

[0137] If the similar purification process parameter set contains identical similar purification process parameters, the identical similar purification process parameters are used as target purification process parameters.

[0138] It is understood that the similar purification process parameters refer to the hydrogen purification process parameters corresponding to the real-time similar standard change curve, which can be an adsorption pressure of 0.5 MPa, an adsorption time of 10 minutes, and an adsorption temperature of 30° C. When the similar purification process parameter set does not contain the same similar purification process parameters, the average of each process parameter can be calculated.

[0139] S6. Perform pressure swing adsorption on the preset trace substances according to the target purification process parameters and determine whether hydrogen purification is completed.

[0140] In the present embodiment, pressure swing adsorption (PSA) technology is used to purify hydrogen. This requires the PSA of trace substances to purify the hydrogen. This PSA technology is currently available, and the main control parameters include adsorption pressure, adsorption time, and adsorption temperature, which are not detailed here.

[0141] If the hydrogen purification is not completed, S7 is executed to determine whether the real-time similarity standard change curve set is replaced.

[0142] It is understandable that when the real-time similarity standard change curve set changes, the real-time similarity standard change curve set is replaced.

[0143] In the embodiment of the present invention, the determining whether the real-time similarity standard change curve set has been replaced includes:

[0144] Using the real-time similar standard change curve set as a historical similar standard change curve set and obtaining a real-time trace substance change curve set;

[0145] Obtaining a real-time similar standard change curve set of the real-time trace substance change curve set;

[0146] Determining whether the real-time similarity standard change curve set is consistent with the historical similarity standard change curve set;

[0147] If the real-time similarity standard change curve set is consistent with the historical similarity standard change curve set, then the real-time similarity standard change curve set has not been replaced;

[0148] If the real-time similarity standard change curve set is inconsistent with the historical similarity standard change curve set, the real-time similarity standard change curve set is replaced.

[0149] Furthermore, as time goes by, the real-time similarity standard change curve set will also be replaced, so it is necessary to use the previous real-time similarity standard change curve set as the historical similarity standard change curve set and obtain a new real-time trace substance change curve set.

[0150] If the real-time similarity standard change curve set has not been replaced, the process returns to the above step of performing pressure swing adsorption on the preset trace substances according to the target purification process parameters and determining whether hydrogen purification is completed.

[0151] It is understandable that when the real-time similarity standard change curve set has not been replaced, the hydrogen purification can continue to be performed according to the target purification process parameters.

[0152] If the real-time similar standard change curve set is replaced, the process returns to the above step of obtaining the real-time trace substance change curve set.

[0153] If the hydrogen purification is completed, S8 is executed to stop monitoring the trace substances during the hydrogen purification process.

[0154] In order to solve the problems described in the background technology, the present invention first constructs a standard trace substance change coordinate system set. In the process of constructing the standard trace substance change coordinate system set, it is necessary to first obtain a standard hydrogen purification data set, and then construct a standard trace substance change coordinate system set based on the standard trace substance change data. At this time, similarity matching can be performed based on the standard trace substance change coordinate system set. Before performing similarity matching, it is necessary to first obtain a real-time trace substance change curve set, and then use the real-time trace substance change curve set to perform similarity matching in the standard trace substance change coordinate system set to obtain a real-time similar standard change curve set.

[0155] Since the real-time similar standard change curve set corresponds to the standard adsorption pressure, standard adsorption time and standard adsorption temperature, and the real-time similar standard change curve set is the most similar to the real-time trace substance change curve set, the target purification process parameters corresponding to the real-time similar standard change curve set can be identified, and then the preset trace substances are subjected to pressure swing adsorption according to the target purification process parameters and it is determined whether the hydrogen purification is completed. If the hydrogen purification is not completed, it is determined whether the real-time similar standard change curve set has been replaced. If the real-time similar standard change curve set has not been replaced, the corresponding target purification process parameters can continue to be used.

[0156] Therefore, we can return to the above step of performing pressure swing adsorption on the preset trace substances according to the target purification process parameters and judging whether the hydrogen purification is completed. If the real-time similarity standard change curve set is replaced, it is necessary to re-perform similarity matching and return to the above step of obtaining the real-time trace substance change curve set. If the hydrogen purification is completed, the monitoring and processing of trace substances during the hydrogen purification process is stopped.

[0157] The monitoring method presented here is simple and practical, suitable for large-scale industrial hydrogen purification production. The system boasts a high level of intelligence, a comprehensive database, and intelligent remote control. The monitoring process comprehensively considers the impact of various trace impurities. Testing has shown that the hydrogen purification rate produced is 2-4% higher than that of existing technologies, with trace impurities reduced to below 0.1%, resulting in excellent purified hydrogen quality.

[0158] like Figure 2 1 is a functional module diagram of a system for monitoring and processing trace substances in a hydrogen purification process provided by one embodiment of the present invention.

[0159] The system 100 for monitoring and processing trace substances during the hydrogen purification process described in the present invention can be installed in an electronic device. Depending on the functionality implemented, the system 100 can include a module 101 for constructing a standard trace substance change coordinate system set, a module 102 for matching a real-time similar standard change curve set, a pressure swing adsorption module 103, and a cycle determination module 104. A module, also referred to as a unit, is a series of computer program segments that can be executed by an electronic device processor and perform a fixed function, and is stored in the electronic device's memory.

[0160] The standard trace substance change coordinate system set construction module 101 is used to obtain a standard hydrogen purification data set, wherein the standard hydrogen purification data set refers to a set of standard purification process parameters, standard trace substance change data and standard hydrogen purification index values ​​during each hydrogen purification, the standard purification process parameters refer to standard adsorption pressure, standard adsorption time and standard adsorption temperature, the standard trace substance change data refer to standard nitrogen concentration change data, standard water vapor content change data, standard oxygen concentration change data and standard carbon monoxide concentration change data, and the standard hydrogen purification index value refers to standard hydrogen extraction purity and standard hydrogen extraction efficiency; constructing a standard trace substance change coordinate system set based on the standard trace substance change data, wherein the standard trace substance change coordinate system set refers to a standard nitrogen concentration change coordinate system, a standard water vapor content change coordinate system, a standard oxygen concentration change coordinate system and a standard carbon monoxide concentration change coordinate system;

[0161] The real-time similar standard change curve set matching module 102 is used to obtain a real-time trace substance change curve set, wherein the real-time trace substance change curve set refers to a real-time nitrogen concentration change curve, a real-time water vapor content change curve, a real-time oxygen concentration change curve, and a real-time carbon monoxide concentration change curve within a unit time from the current moment; and perform similarity matching on the real-time trace substance change curve set in the standard trace substance change coordinate system to obtain a real-time similar standard change curve set;

[0162] The pressure swing adsorption module 103 is used to identify target purification process parameters corresponding to the real-time similarity standard change curve set, wherein the target purification process parameters are target adsorption pressure, target adsorption time, and target adsorption temperature; perform pressure swing adsorption on preset trace substances according to the target purification process parameters and determine whether hydrogen purification is completed;

[0163] The cycle judgment module 104 is used to determine whether the real-time similarity standard change curve set has been replaced if the hydrogen purification has not been completed; if the real-time similarity standard change curve set has not been replaced, return to the above-mentioned step of performing pressure swing adsorption on the preset trace substances according to the target purification process parameters and determine whether the hydrogen purification is completed; if the real-time similarity standard change curve set has been replaced, return to the above-mentioned step of obtaining the real-time trace substance change curve set; if the hydrogen purification is completed, stop monitoring and processing of trace substances during the hydrogen purification process.

[0164] In detail, the modules in the monitoring and processing system 100 for trace substances in the hydrogen purification process according to the embodiment of the present invention are used in the same manner as above. Figure 1 The monitoring and treatment method of trace substances in the hydrogen purification process described in the preceding text is the same technical means and can produce the same technical effects, so it will not be repeated here.

[0165] like Figure 3 FIG. 1 is a schematic diagram of the structure of an electronic device for implementing a method for monitoring and processing trace substances in a hydrogen purification process provided by an embodiment of the present invention.

[0166] The electronic device 1 may include a processor 10, a memory 11 and a bus 12, and may also include a computer program stored in the memory 11 and executable on the processor 10, such as a program for monitoring and processing trace substances in a hydrogen purification process.

[0167] The memory 11 includes at least one type of readable storage medium, including a flash memory, a mobile hard disk, a multimedia card, a card-type memory (e.g., SD or DX memory), a magnetic memory, a magnetic disk, an optical disk, etc. In some embodiments, the memory 11 may be an internal storage unit of the electronic device 1, such as a mobile hard disk of the electronic device 1. In other embodiments, the memory 11 may also be an external storage device of the electronic device 1, such as a plug-in mobile hard disk, a smart memory card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the electronic device 1.

[0168] Furthermore, the memory 11 includes both an internal storage unit of the electronic device 1 and an external storage device. The memory 11 can be used not only to store application software installed in the electronic device 1 and various data, such as the code of a program for monitoring and processing methods for trace substances in a hydrogen purification process, but also to temporarily store data that has been output or is about to be output.

[0169] In some embodiments, the processor 10 may be composed of an integrated circuit, such as a single packaged integrated circuit, or a plurality of packaged integrated circuits with the same or different functions, including one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and a combination of various control chips. The processor 10 is the control core (Control Unit) of the electronic device, connecting the various components of the entire electronic device using various interfaces and circuits. It executes or runs programs or modules stored in the memory 11 (such as a program for monitoring and processing trace substances in the hydrogen purification process) and calls data stored in the memory 11 to perform various functions of the electronic device 1 and process data.

[0170] The bus 12 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus 12 may be divided into an address bus, a data bus, a control bus, etc. The bus 12 is configured to enable communication between the memory 11 and at least one processor 10, etc.

[0171] Figure 3 Only the electronic device with components is shown, and it can be understood by those skilled in the art that Figure 3 The structure shown does not constitute a limitation on the electronic device 1 , and may include fewer or more components than shown in the figure, or combine certain components, or arrange the components differently.

[0172] For example, although not shown, the electronic device 1 may further include a power source (such as a battery) for powering the various components. Preferably, the power source may be logically connected to the at least one processor 10 via a power management device, thereby implementing functions such as charging management, discharging management, and power consumption management through the power management device. The power source may further include any components such as one or more DC or AC power sources, a recharging device, a power failure detection circuit, a power converter or inverter, a power status indicator, etc. The electronic device 1 may further include various sensors, Bluetooth modules, Wi-Fi modules, etc., which will not be described in detail here.

[0173] Furthermore, the electronic device 1 may also include a network interface. Optionally, the network interface may include a wired interface and / or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), which is generally used to establish a communication connection between the electronic device 1 and other electronic devices.

[0174] Optionally, the electronic device 1 may further include a user interface, which may be a display, an input unit (such as a keyboard), or a standard wired interface or a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-emitting Diode) touchscreen. The display may also be appropriately referred to as a display screen or a display unit, which is used to display information processed in the electronic device 1 and to display a visual user interface.

[0175] The program for monitoring and processing trace substances in the hydrogen purification process stored in the memory 11 of the electronic device 1 is a combination of multiple instructions. When running in the processor 10, it can achieve: obtaining a standard hydrogen purification data set, wherein the standard hydrogen purification data set refers to a set of standard purification process parameters, standard trace substance change data, and standard hydrogen purification index values ​​during each hydrogen purification, the standard purification process parameters refer to standard adsorption pressure, standard adsorption time, and standard adsorption temperature, the standard trace substance change data refer to standard nitrogen concentration change data, standard water vapor content change data, standard oxygen concentration change data, and standard carbon monoxide concentration change data, and the standard hydrogen purification index values ​​refer to standard hydrogen extraction purity and standard hydrogen extraction efficiency;

[0176] Constructing a standard trace substance change coordinate system set according to the standard trace substance change data, wherein the standard trace substance change coordinate system set refers to a standard nitrogen concentration change coordinate system, a standard water vapor content change coordinate system, a standard oxygen concentration change coordinate system, and a standard carbon monoxide concentration change coordinate system;

[0177] Obtaining a real-time trace substance change curve set, wherein the real-time trace substance change curve set refers to a real-time nitrogen concentration change curve, a real-time water vapor content change curve, a real-time oxygen concentration change curve, and a real-time carbon monoxide concentration change curve within a unit time from the current moment;

[0178] Performing similarity matching on the standard trace substance change coordinate system using the real-time trace substance change curve set to obtain a real-time similar standard change curve set;

[0179] Identifying target purification process parameters corresponding to the real-time similarity standard change curve set, wherein the target purification process parameters refer to target adsorption pressure, target adsorption time, and target adsorption temperature;

[0180] Performing pressure swing adsorption on the preset trace substances according to the target purification process parameters and determining whether hydrogen purification is completed;

[0181] If the hydrogen purification is not completed, determining whether the real-time similarity standard change curve set has been replaced;

[0182] If the real-time similarity standard change curve set has not been replaced, returning to the above step of performing pressure swing adsorption on the preset trace substances according to the target purification process parameters and determining whether hydrogen purification is completed;

[0183] If the real-time similar standard change curve set is replaced, return to the above step of obtaining the real-time trace substance change curve set;

[0184] If the hydrogen purification is completed, the monitoring and processing of trace substances in the hydrogen purification process will be stopped.

[0185] Specifically, the specific implementation method of the processor 10 for the above instructions can refer to Figures 1 to 3 The description of the relevant steps in the corresponding embodiments will not be repeated here.

[0186] Furthermore, if the modules / units integrated in the electronic device 1 are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. The computer-readable storage medium can be volatile or non-volatile.

[0187] For example, the computer-readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, or a read-only memory (ROM).

[0188] The present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program. When the computer program is executed by a processor of an electronic device, the computer program can implement:

[0189] Obtaining a standard hydrogen purification data set, wherein the standard hydrogen purification data set refers to a collection of standard purification process parameters, standard trace substance change data, and standard hydrogen purification index values ​​during each hydrogen purification operation, wherein the standard purification process parameters refer to standard adsorption pressure, standard adsorption time, and standard adsorption temperature; the standard trace substance change data refer to standard nitrogen concentration change data, standard water vapor content change data, standard oxygen concentration change data, and standard carbon monoxide concentration change data; and the standard hydrogen purification index values ​​refer to standard hydrogen extraction purity and standard hydrogen extraction efficiency;

[0190] Constructing a standard trace substance change coordinate system set according to the standard trace substance change data, wherein the standard trace substance change coordinate system set refers to a standard nitrogen concentration change coordinate system, a standard water vapor content change coordinate system, a standard oxygen concentration change coordinate system, and a standard carbon monoxide concentration change coordinate system;

[0191] Obtaining a real-time trace substance change curve set, wherein the real-time trace substance change curve set refers to a real-time nitrogen concentration change curve, a real-time water vapor content change curve, a real-time oxygen concentration change curve, and a real-time carbon monoxide concentration change curve within a unit time from the current moment;

[0192] Performing similarity matching on the standard trace substance change coordinate system using the real-time trace substance change curve set to obtain a real-time similar standard change curve set;

[0193] Identifying target purification process parameters corresponding to the real-time similarity standard change curve set, wherein the target purification process parameters refer to target adsorption pressure, target adsorption time, and target adsorption temperature;

[0194] Performing pressure swing adsorption on the preset trace substances according to the target purification process parameters and determining whether hydrogen purification is completed;

[0195] If the hydrogen purification is not completed, determining whether the real-time similarity standard change curve set has been replaced;

[0196] If the real-time similarity standard change curve set has not been replaced, returning to the above step of performing pressure swing adsorption on the preset trace substances according to the target purification process parameters and determining whether hydrogen purification is completed;

[0197] If the real-time similar standard change curve set is replaced, return to the above step of obtaining the real-time trace substance change curve set;

[0198] If the hydrogen purification is completed, the monitoring and processing of trace substances in the hydrogen purification process will be stopped.

[0199] In the several embodiments provided by the present invention, it should be understood that the disclosed devices, systems and methods can be implemented in other ways. For example, the system embodiments described above are only exemplary, and actual implementations may have other division methods.

[0200] The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed across multiple network elements. Some or all of the modules may be selected to achieve the purpose of the solution of this embodiment according to actual needs.

[0201] In addition, each function module in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of hardware plus software function module.

[0202] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or essential characteristics of the present application.

[0203] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A method for monitoring and processing trace substances in a hydrogen purification process, characterized in that: The method comprises: Obtaining a standard hydrogen purification data set, wherein the standard hydrogen purification data set refers to a collection of standard purification process parameters, standard trace substance change data, and standard hydrogen purification index values ​​during each hydrogen purification operation, wherein the standard purification process parameters refer to standard adsorption pressure, standard adsorption time, and standard adsorption temperature; the standard trace substance change data refer to standard nitrogen concentration change data, standard water vapor content change data, standard oxygen concentration change data, and standard carbon monoxide concentration change data; and the standard hydrogen purification index values ​​refer to standard hydrogen extraction purity and standard hydrogen extraction efficiency; Constructing a standard trace substance change coordinate system set according to the standard trace substance change data, wherein the standard trace substance change coordinate system set refers to a standard nitrogen concentration change coordinate system, a standard water vapor content change coordinate system, a standard oxygen concentration change coordinate system, and a standard carbon monoxide concentration change coordinate system; Obtaining a real-time trace substance change curve set, wherein the real-time trace substance change curve set refers to a real-time nitrogen concentration change curve, a real-time water vapor content change curve, a real-time oxygen concentration change curve, and a real-time carbon monoxide concentration change curve within a unit time from the current moment; Performing similarity matching on the standard trace substance change coordinate system using the real-time trace substance change curve set to obtain a real-time similar standard change curve set; Identifying target purification process parameters corresponding to the real-time similarity standard change curve set, wherein the target purification process parameters refer to target adsorption pressure, target adsorption time, and target adsorption temperature; Performing pressure swing adsorption on the preset trace substances according to the target purification process parameters and determining whether hydrogen purification is completed; If the hydrogen purification is not completed, determining whether the real-time similarity standard change curve set has been replaced; If the real-time similarity standard change curve set has not been replaced, returning to the above step of performing pressure swing adsorption on the preset trace substances according to the target purification process parameters and determining whether hydrogen purification is completed; If the real-time similar standard change curve set is replaced, return to the above step of obtaining the real-time trace substance change curve set; If the hydrogen purification is completed, the monitoring and processing of trace substances in the hydrogen purification process will be stopped.

2. The method for monitoring and treating trace substances in the hydrogen purification process according to claim 1, characterized in that: The step of constructing a standard trace substance change coordinate system set according to the standard trace substance change data includes: Performing point fitting in a pre-constructed nitrogen concentration change coordinate system according to the standard nitrogen concentration change data to obtain a standard nitrogen concentration change coordinate system, wherein the horizontal axis of the nitrogen concentration change coordinate system is the time axis and the vertical axis is the nitrogen concentration; Performing point fitting in a pre-constructed water vapor content change coordinate system according to the standard water vapor content change data to obtain a standard water vapor content change coordinate system, wherein the horizontal axis of the water vapor content change coordinate system is the time axis and the vertical axis is the water vapor content; Performing point fitting in a pre-constructed oxygen concentration change coordinate system according to the standard oxygen concentration change data to obtain a standard oxygen concentration change coordinate system, wherein the horizontal axis of the oxygen concentration change coordinate system is the time axis and the vertical axis is the oxygen concentration; Performing point fitting in a pre-constructed carbon monoxide concentration change coordinate system according to the standard carbon monoxide concentration change data to obtain a standard carbon monoxide concentration change coordinate system, wherein the horizontal axis of the carbon monoxide concentration change coordinate system is the time axis and the vertical axis is the carbon monoxide concentration; The standard nitrogen concentration change coordinate system, the standard water vapor content change coordinate system, the standard oxygen concentration change coordinate system and the standard carbon monoxide concentration change coordinate system are collected to obtain a standard trace substance change coordinate system set.

3. The method for monitoring and treating trace substances in the hydrogen purification process according to claim 1, characterized in that: The step of obtaining a real-time trace substance change curve set includes: Obtain real-time nitrogen concentration, real-time water vapor content, real-time oxygen concentration and real-time carbon monoxide concentration; According to the real-time nitrogen concentration, real-time water vapor content, real-time oxygen concentration and real-time carbon monoxide concentration, respectively draw a real-time nitrogen concentration change curve, a real-time water vapor content change curve, a real-time oxygen concentration change curve and a real-time carbon monoxide concentration change curve; Get the current time, and define the real-time curve interception period based on the preset unit time and the current time; According to the real-time curve interception time period, a unit real-time nitrogen change curve, a unit real-time water vapor change curve, a unit real-time oxygen change curve and a unit real-time carbon monoxide change curve are respectively intercepted from the real-time nitrogen concentration change curve, the real-time water vapor content change curve, the real-time oxygen concentration change curve and the real-time carbon monoxide concentration change curve; The unit real-time nitrogen change curve, the unit real-time water vapor change curve, the unit real-time oxygen change curve and the unit real-time carbon monoxide change curve are collected to obtain a real-time trace substance change curve set.

4. The method for monitoring and treating trace substances in the hydrogen purification process according to claim 1 or 3, characterized in that: The method of performing similarity matching on the standard trace substance change coordinate system using the real-time trace substance change curve set to obtain a real-time similar standard change curve set includes: sequentially extracting real-time trace substance change curves from the real-time trace substance change curve set, and extracting associated trace substance change coordinate systems corresponding to the real-time trace substance change curves from the standard trace substance change coordinate system set; Identifying a substance change starting value, a substance change integral value, a substance change ending value, and a substance change ending slope of the real-time trace substance change curve; Identify a real-time similar standard change curve in the associated trace substance change coordinate system according to the substance change starting value, substance change integral value, substance change ending value, and substance change ending slope; The real-time similar standard change curves corresponding to the real-time trace substance change curves are collected to obtain a real-time similar standard change curve set.

5. The method for monitoring and treating trace substances in the hydrogen purification process according to claim 4, characterized in that: The method for identifying the material change starting value, material change integral value, material change ending value, and material change ending slope of the real-time trace material change curve includes: Identifying a substance change value corresponding to a starting endpoint of the real-time trace substance change curve, and using the substance change value corresponding to the starting endpoint as a substance change starting value; Integrating the real-time trace substance change curve to obtain a substance change integral value; Identifying a substance change value corresponding to a termination endpoint of the real-time trace substance change curve, and using the substance change value corresponding to the termination endpoint as a substance change termination value; The slope of the termination endpoint is calculated and used as the termination slope of the material change.

6. The method for monitoring and treating trace substances in the hydrogen purification process according to claim 5, characterized in that: The identifying of a real-time similar standard change curve in the associated trace substance change coordinate system according to the substance change starting value, the substance change integral value, the substance change ending value, and the substance change ending slope includes: Calculating a substance starting matching interval according to the substance change starting value and a preset starting screening distance value, wherein the substance starting matching interval is an interval consisting of the substance change starting value minus the starting screening distance value and the substance change starting value plus the starting screening distance value; Calculating a material integral matching interval based on the material change integral value and a preset integral screening distance value, wherein the material integral matching distance interval is equal to an interval consisting of the material change integral value minus the integral screening distance value and the material change integral value plus the integral screening distance value; Calculating a material termination matching interval according to the material change termination value and a preset termination screening distance value, wherein the material termination matching interval is equal to an interval consisting of the material change termination value minus the termination screening distance value and the material change termination value plus the termination screening distance value; Calculating a material termination slope matching interval based on the material change termination slope and a preset slope screening distance value, wherein the material termination slope matching interval is equal to an interval consisting of the material change termination slope minus the slope screening distance value and the material change termination slope plus the slope screening distance value; Performing a primary screening in the associated trace substance change coordinate system according to the substance starting matching interval, substance integral matching interval, substance ending matching interval, and substance ending slope matching interval to obtain a primary similarity standard change curve set; A real-time similarity standard change curve is identified in the initial similarity standard change curve set according to the material change starting value, the material change integral value, the material change ending value, the material change ending slope and a preset matching formula.

7. The method for monitoring and treating trace substances in the hydrogen purification process according to claim 6, characterized in that: The matching formula is as follows: Among them, ε i represents the curve difference value between the i-th primary similar standard change curve in the primary similar standard change curve set and the real-time trace substance change curve, k q Indicates the starting matching weight, y q Indicates the starting value of the material change of the real-time trace material change curve. Indicates the starting value of the material change of the i-th initial similar standard change curve, k j Indicates the integral matching weight, y j Indicates the material change integral value of the real-time trace material change curve, represents the material change integral value of the i-th initial similarity standard change curve, k z Represents the termination matching weight, y z Indicates the material change termination value of the real-time trace material change curve. Indicates the end value of the material change of the i-th initial similar standard change curve, k x represents the slope matching weight, y x Indicates the termination slope of the material change of the real-time trace material change curve, It represents the termination slope of the substance change of the i-th initial similarity standard change curve.

8. The method for monitoring and treating trace substances in the hydrogen purification process according to claim 7, characterized in that: The identifying target purification process parameters corresponding to the real-time similarity standard change curve set includes: sequentially extracting real-time similarity standard change curves from the real-time similarity standard change curve set; Identifying similar purification process parameters corresponding to the real-time similar standard change curve to obtain a similar purification process parameter set; Determining whether the similar purification process parameter set contains the same similar purification process parameters; If there are no identical similar purification process parameters in the similar purification process parameter set, the target purification process parameters are calculated using the following formula: Where, f represents the target adsorption pressure, They represent the adsorption pressure, adsorption time and adsorption temperature corresponding to the real-time similar standard change curve in the standard nitrogen concentration change coordinate system, and They represent the adsorption pressure, adsorption time and adsorption temperature corresponding to the real-time similar standard change curve in the standard water vapor content change coordinate system, and They represent the adsorption pressure, adsorption time and adsorption temperature corresponding to the real-time similar standard change curve in the standard oxygen concentration change coordinate system, respectively. CO , t CO and w CO They respectively represent the adsorption pressure, adsorption time and adsorption temperature corresponding to the real-time similar standard change curve in the standard carbon monoxide concentration change coordinate system, t represents the target adsorption time, and w represents the target adsorption temperature; If the similar purification process parameter set contains identical similar purification process parameters, the identical similar purification process parameters are used as target purification process parameters.

9. The method for monitoring and treating trace substances in the hydrogen purification process according to claim 8, characterized in that: The determining whether the real-time similarity standard change curve set has been replaced includes: Using the real-time similar standard change curve set as a historical similar standard change curve set and obtaining a real-time trace substance change curve set; Obtaining a real-time similar standard change curve set of the real-time trace substance change curve set; Determining whether the real-time similarity standard change curve set is consistent with the historical similarity standard change curve set; If the real-time similarity standard change curve set is consistent with the historical similarity standard change curve set, then the real-time similarity standard change curve set has not been replaced; If the real-time similarity standard change curve set is inconsistent with the historical similarity standard change curve set, the real-time similarity standard change curve set is replaced.

10. A monitoring and processing system for trace substances in a hydrogen purification process, characterized in that: The system comprises: a standard trace substance change coordinate system set construction module, for obtaining a standard hydrogen purification data set, wherein the standard hydrogen purification data set refers to a set of standard purification process parameters, standard trace substance change data, and standard hydrogen purification index values ​​during each hydrogen purification operation, wherein the standard purification process parameters refer to standard adsorption pressure, standard adsorption time, and standard adsorption temperature, the standard trace substance change data refer to standard nitrogen concentration change data, standard water vapor content change data, standard oxygen concentration change data, and standard carbon monoxide concentration change data, and the standard hydrogen purification index value refers to standard hydrogen extraction purity and standard hydrogen extraction efficiency; constructing a standard trace substance change coordinate system set based on the standard trace substance change data, wherein the standard trace substance change coordinate system set refers to a standard nitrogen concentration change coordinate system, a standard water vapor content change coordinate system, a standard oxygen concentration change coordinate system, and a standard carbon monoxide concentration change coordinate system; A real-time similar standard change curve set matching module is used to obtain a real-time trace substance change curve set, wherein the real-time trace substance change curve set refers to a real-time nitrogen concentration change curve, a real-time water vapor content change curve, a real-time oxygen concentration change curve, and a real-time carbon monoxide concentration change curve within a unit time from the current moment; and the real-time trace substance change curve set is used to perform similarity matching in the standard trace substance change coordinate system to obtain a real-time similar standard change curve set; a pressure swing adsorption module, configured to identify target purification process parameters corresponding to the real-time similarity standard change curve set, wherein the target purification process parameters refer to target adsorption pressure, target adsorption time, and target adsorption temperature; perform pressure swing adsorption on preset trace substances according to the target purification process parameters, and determine whether hydrogen purification is completed; A loop judgment module is used to determine whether the real-time similarity standard change curve set has been replaced if hydrogen purification has not been completed; if the real-time similarity standard change curve set has not been replaced, return to the above-mentioned step of performing pressure swing adsorption on the preset trace substances according to the target purification process parameters and determine whether hydrogen purification is completed; if the real-time similarity standard change curve set has been replaced, return to the above-mentioned step of obtaining the real-time trace substance change curve set; if hydrogen purification is completed, stop monitoring and processing of trace substances during the hydrogen purification process.

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