Monitoring treatment method and system for trace substances in hydrogen purification process

Abstract

The invention relates to the technical field of hydrogen purification, and discloses a method and a system for monitoring and processing trace substances in a hydrogen purification process, and the method comprises the following steps: constructing a standard trace substance change coordinate system set according to standard trace substance change data, and performing similarity matching in the standard trace substance change coordinate system set by 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 similar standard change curve set, performing pressure swing adsorption according to the target purification process parameters, and judging whether hydrogen purification is completed or not. If not, whether the real-time similar standard change curve set is replaced or not is judged, if not, pressure swing adsorption continues to be carried out, whether hydrogen purification is completed or not is judged, if yes, the real-time trace substance change curve set is obtained again, and if yes, hydrogen purification is stopped. The problem that the purification effect is poor in the hydrogen purification process in the prior art can be solved.

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 using ammonia to produce hydrogen, hydrogen purification is a crucial link. Since 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 will seriously affect the purity of hydrogen and subsequent application effects. Therefore, effective monitoring and treatment methods must be adopted to ensure the purity of hydrogen.

[0003] Currently, pressure swing adsorption (PSA) technology is mainly used to purify hydrogen. However, during the pressure swing adsorption process, the adsorption parameters of the pressure swing adsorption cannot be adaptively adjusted according to the changes in trace impurities. Therefore, the current process of purifying hydrogen using pressure swing adsorption technology has the problem of poor purification effect.

[0004] The prior art, for example, is named: A method and system for online monitoring and real-time optimization of a refining hydrogen system, application number CN202410044960.1, which discloses that the method includes: obtaining the operating parameters of the hydrogen production device, hydrogen consumption device and hydrogen purification device 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 operating parameters after data correction and temperature and pressure compensation and the data obtained from the laboratory information management system database into the pre-established corresponding hydrogen production device model, hydrogen consumption device model, hydrogen purification device model and hydrogen system pipeline network models at all levels to obtain online monitoring simulation calculation data of the hydrogen system; using a system optimization algorithm, based on the online monitoring simulation calculation data, solving the pre-established online monitoring and optimization model to obtain online optimization calculation data of the hydrogen system. This method requires the establishment of multiple models, which is complex and costly, and does not consider the influence of multiple trace impurities. Summary of the invention

[0005] The present invention provides a method and system for monitoring and processing 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 object, the present invention provides a method for monitoring and processing 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 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;

[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] Acquire 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] Using the real-time trace substance change curve set to perform similarity matching in the standard trace substance change coordinate system set, a real-time similar standard change curve set is obtained;

[0011] Identifying target purification process parameters corresponding to the real-time similar 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 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 is replaced;

[0014] If the real-time similar 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 is stopped.

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

[0018] According to the standard nitrogen concentration change data, point fitting is performed in a pre-constructed nitrogen concentration change coordinate system 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] According to the standard water vapor content change data, point fitting is performed in a pre-constructed water vapor content change coordinate system 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] According to the standard oxygen concentration change data, point fitting is performed in a pre-constructed oxygen concentration change coordinate system 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] According to the standard carbon monoxide concentration change data, point fitting is performed in a pre-constructed carbon monoxide concentration change coordinate system 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 according to 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, the using 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 includes:

[0030] Extracting real-time trace substance change curves in sequence 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] Identify 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;

[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 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:

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

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

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

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

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

[0041] Calculate the material integral matching interval according to the material change integral value and the preset integral screening distance value, wherein the material integral matching distance interval is equal to the 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 according to 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 start matching interval, substance integral matching interval, substance end matching interval and substance end slope matching interval, to obtain a primary similarity standard change curve set;

[0045] The real-time similar standard change curve is identified in the initial similar 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 represents the curve difference value between the i-th initial similar standard change curve in the initial 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. represents the starting value of the material change of the i-th initial similar standard change curve, k j represents 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 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. represents 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 material change of the i-th initial similar standard change curve.

[0049] Optionally, the identifying the target purification process parameter corresponding to the real-time similar 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 respectively 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 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 there are identical similar purification process parameters in the similar purification process parameter set, 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 is 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 also 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 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 ​​for 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; construct 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;

[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; the real-time trace substance change curve set is used to perform similarity matching in the standard trace substance change coordinate system set to obtain a real-time similar standard change curve set;

[0066] A pressure swing adsorption module is used to identify the target purification process parameters corresponding to the real-time similar standard change curve set, wherein the target purification process parameters refer to the target adsorption pressure, the target adsorption time and the target adsorption temperature; according to the target purification process parameters, the preset trace substances are subjected to pressure swing adsorption and it is determined whether the hydrogen purification is completed;

[0067] A loop judgment module is used to judge 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 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 has been replaced, return to the above 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.

[0068] In order to solve the above problem, the present invention further provides an electronic device, the 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, in which at least one instruction is stored. 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 the 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 a standard adsorption pressure, a standard adsorption time and a 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 is replaced. If the real-time similar standard change curve set is not replaced, the corresponding target purification process parameters can continue to be used. Therefore, it is possible to return to the above-mentioned step of performing pressure swing adsorption on the preset trace substances according to the target purification process parameters and determining whether the hydrogen purification is completed. If the real-time similar standard change curve set is replaced, it is necessary to re-perform similarity matching and it is necessary to return to the above-mentioned 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. 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 prior art. The monitoring and treatment process comprehensively considers the influence of various trace impurities. Through testing, the purification rate of produced hydrogen is 2-4% higher than that of the prior art, the trace impurities are reduced to below 0.1%, and the quality of the purified hydrogen is excellent. 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 provided by 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 provided by an embodiment of the present invention;

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

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

[0078] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

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

[0080] Reference Figure 1 FIG. 1 is a flow chart of a method for monitoring and processing trace substances in a hydrogen purification process according to an embodiment of the present invention. In this embodiment, the method for monitoring and processing trace substances in a hydrogen purification process includes:

[0081] S1. Obtain a standard hydrogen purification data set.

[0082] In detail, 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 ​​for each hydrogen purification operation, 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.

[0083] It can be understood that the standard hydrogen purification data set refers to a data set generated by technicians each time they use ammonia to produce purified hydrogen.

[0084] S2. Constructing a standard trace substance change coordinate system set according to the standard trace substance change data.

[0085] It can be understood that the standard trace substance change coordinate system set is a set of standard trace substance change coordinate systems constructed according to the change relationship between the standard trace substance change data and time.

[0086] In detail, 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.

[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 according to the standard trace substance change data includes:

[0089] According to the standard nitrogen concentration change data, point fitting is performed in a pre-constructed nitrogen concentration change coordinate system 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] According to the standard water vapor content change data, point fitting is performed in a pre-constructed water vapor content change coordinate system 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] According to the standard oxygen concentration change data, point fitting is performed in a pre-constructed oxygen concentration change coordinate system 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] According to the standard carbon monoxide concentration change data, point fitting is performed in a pre-constructed carbon monoxide concentration change coordinate system 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] It can be understood that 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 an embodiment of the present invention, the step of obtaining a real-time trace substance change curve set includes:

[0098] Obtain real-time nitrogen concentration, real-time water vapor content, real-time oxygen concentration and real-time carbon monoxide concentration;

[0099] 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;

[0100] Get the current time, and define the real-time curve interception period according to the preset unit time and the current time;

[0101] 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;

[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 real-time trace substance change curve set.

[0103] It can be understood that the real-time curve interception period refers to a period whose starting time is the current time minus the unit time and whose ending time is the current time. For example, when the current time is 10:30 and the unit time is 1 minute, the real-time curve interception period is 10:29-10:30.

[0104] S4. Using the real-time trace substance change curve set, similarity matching is performed in the standard trace substance change coordinate system set to obtain a real-time similar standard change curve set.

[0105] The real-time similar standard change curve set refers to the set of curves that are 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 the embodiment of the present invention, the use of 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 includes:

[0107] Extracting real-time trace substance change curves in sequence 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] Identify 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;

[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 can be 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 a 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 termination value refers to the substance change value corresponding to the end point of the real-time trace substance change curve, and the substance change termination 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 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:

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

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

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

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

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

[0119] Calculate the material integral matching interval according to the material change integral value and the preset integral screening distance value, wherein the material integral matching distance interval is equal to the 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 according to 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 start matching interval, substance integral matching interval, substance end matching interval and substance end slope matching interval, to obtain a primary similarity standard change curve set;

[0123] The real-time similar standard change curve is identified in the initial similar 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 can be understood that the initial screening distance value refers to half the distance value of the initial matching interval of the substance. For example, when the initial 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 3]. The integral screening distance value refers to half the distance value of the material integral matching interval, the termination screening distance value refers to half the distance value of the material termination matching interval, and the slope screening distance value refers to half the distance value of the material termination slope matching interval.

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

[0126]

[0127] Among them, ε i represents the curve difference value between the i-th initial similar standard change curve in the initial 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. represents the starting value of the material change of the i-th initial similar standard change curve, k j represents 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 similar 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. represents 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 material change of the i-th initial similar standard change curve.

[0128] S5. Identify the target purification process parameters corresponding to the real-time similarity standard change curve set.

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

[0130] In an embodiment of the present invention, the step of identifying the target purification process parameter corresponding to the real-time similarity standard change curve set includes:

[0131] Sequentially extracting real-time similarity standard change curves from the real-time similarity standard change curve set;

[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 respectively 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 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 there are identical similar purification process parameters in the similar purification process parameter set, the identical similar purification process parameters are used as target purification process parameters.

[0138] It can be 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 min, and an adsorption temperature of 30° C. When there are no identical similar purification process parameters in the similar purification process parameter set, the mean of each process parameter can be calculated.

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

[0140] In the embodiment of the present invention, the pressure swing adsorption (PSA) technology is used to purify hydrogen, and the trace substances need to be subjected to pressure swing adsorption to purify the hydrogen. The pressure swing adsorption technology is an existing technology, and the main control parameters include: adsorption pressure, adsorption time and adsorption temperature, which will not be described 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 step of 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 the 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 according to the target purification process parameters.

[0152] 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.

[0153] If the hydrogen purification is completed, S8 is executed to stop monitoring and processing of trace substances in 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 is replaced; if the real-time similar standard change curve set is not replaced, the corresponding target purification process parameters can continue to be used.

[0156] Therefore, it is possible to 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 changes, 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 of the present invention is simple and practical, suitable for industrial large-scale hydrogen purification production, with a high degree of system intelligence, a complete database, and intelligent remote control. The monitoring and processing process of the present invention fully considers the influence of various trace impurities. Through testing, the purification rate of hydrogen produced is 2-4% higher than that of the prior art, and the trace impurities are reduced to less than 0.1%, and the purified hydrogen has excellent 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 an embodiment of the present invention.

[0159] The monitoring and processing system 100 for trace substances in the hydrogen purification process of the present invention can be installed in an electronic device. According to the functions to be implemented, the monitoring and processing system 100 for trace substances in the hydrogen purification process can include a standard trace substance change coordinate system set construction module 101, a real-time similar standard change curve set matching module 102, a pressure swing adsorption module 103 and a cycle judgment module 104. The module of the present invention can also be called a unit, which refers to a series of computer program segments that can be executed by an electronic device processor and can complete fixed functions, which are stored in the memory of the electronic device.

[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 ​​for 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; construct 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;

[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; the real-time trace substance change curve set is used to perform similarity matching in the standard trace substance change coordinate system set to obtain a real-time similar standard change curve set;

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

[0163] The cycle judgment module 104 is used to judge 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 judging 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 described above. Figure 1 The monitoring and treatment method of trace substances in the hydrogen purification process described in the present invention is the same as the technical means and can produce the same technical effects, so it will not be repeated here.

[0165] like Figure 3 , which 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 flash memory, mobile hard disk, multimedia card, card-type memory (e.g., SD or DX memory, etc.), magnetic memory, disk, 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 (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the electronic device 1.

[0168] Furthermore, the memory 11 also includes 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 and various data installed in the electronic device 1, such as the code of the program of the monitoring and processing method of trace substances in the hydrogen purification process, but also to temporarily store data that has been output or is to be output.

[0169] The processor 10 may be composed of an integrated circuit in some embodiments, for example, 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 combinations of various control chips, etc. The processor 10 is the control core (Control Unit) of the electronic device, and uses various interfaces and lines to connect various components of the entire electronic device, and executes or executes programs or modules stored in the memory 11 (such as a monitoring and processing method program for trace substances in the hydrogen purification process, etc.), and calls data stored in the memory 11 to execute 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 realize connection and communication between the memory 11 and at least one processor 10, etc.

[0171] Figure 3 Only an electronic device with components is shown, and those skilled in the art will understand 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 also include a power source (such as a battery) for supplying power to each component. Preferably, the power source may be logically connected to the at least one processor 10 through a power management device, so that the power management device can realize functions such as charging management, discharging management, and power consumption management. The power source may also include any components such as one or more DC or AC power sources, recharging devices, power failure detection circuits, power converters or inverters, power status indicators, etc. The electronic device 1 may also include a variety of sensors, Bluetooth modules, Wi-Fi modules, etc., which will not be repeated 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, and an OLED (Organic Light-emitting Diode) touch device. 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 monitoring and processing method program of trace substances in the hydrogen purification process stored in the memory 11 in 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 value refers 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] Acquire 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] Using the real-time trace substance change curve set to perform similarity matching in the standard trace substance change coordinate system set, a real-time similar standard change curve set is obtained;

[0179] Identifying target purification process parameters corresponding to the real-time similar 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 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 is replaced;

[0182] If the real-time similar 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 is 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 module / unit integrated in the electronic device 1 is implemented in the form of a software functional unit and sold or used as an independent product, it 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, and 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, and 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 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;

[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] Acquire 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] Using the real-time trace substance change curve set to perform similarity matching in the standard trace substance change coordinate system set, a real-time similar standard change curve set is obtained;

[0193] Identifying target purification process parameters corresponding to the real-time similar 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 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 is replaced;

[0196] If the real-time similar 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 is 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 illustrative, and actual implementation may have other division methods.

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

[0201] In addition, each functional module in each embodiment of the present invention may be integrated into one processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional modules.

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

[0203] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

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 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 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; Acquire 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; Using the real-time trace substance change curve set to perform similarity matching in the standard trace substance change coordinate system set, a real-time similar standard change curve set is obtained; Identifying target purification process parameters corresponding to the real-time similar 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 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 is replaced; If the real-time similar 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 is stopped.

2. The method for monitoring and processing 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 comprises: According to the standard nitrogen concentration change data, point fitting is performed in a pre-constructed nitrogen concentration change coordinate system 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; According to the standard water vapor content change data, point fitting is performed in a pre-constructed water vapor content change coordinate system 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; According to the standard oxygen concentration change data, point fitting is performed in a pre-constructed oxygen concentration change coordinate system 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; According to the standard carbon monoxide concentration change data, point fitting is performed in a pre-constructed carbon monoxide concentration change coordinate system 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 processing 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 comprises: 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 according to 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 processing trace substances in the hydrogen purification process according to claim 1 or 3, characterized in that: The method of using 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 includes: Extracting real-time trace substance change curves in sequence 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; Identify 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; 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 processing trace substances in the hydrogen purification process according to claim 4, characterized in that: The identification of 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: Identify the substance change value corresponding to the starting endpoint of the real-time trace substance change curve, and use the substance change value corresponding to the starting endpoint as the substance change starting value; Integrating the real-time trace substance change curve to obtain a substance change integral value; Identify the substance change value corresponding to the termination endpoint of the real-time trace substance change curve, and use the substance change value corresponding to the termination endpoint as the substance change termination value; The slope of the termination endpoint is calculated, and the slope of the termination endpoint is used as the material change termination slope.

6. The method for monitoring and processing trace substances in the hydrogen purification process according to claim 5, characterized in that: The method of 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: Calculating a material starting matching interval according to the material change starting value and a preset starting screening distance value, wherein the material starting matching interval is an interval consisting of the material change starting value minus the starting screening distance value and the material change starting value plus the starting screening distance value; Calculate the material integral matching interval according to the material change integral value and the preset integral screening distance value, wherein the material integral matching distance interval is equal to the 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 according to 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 start matching interval, substance integral matching interval, substance end matching interval and substance end slope matching interval, to obtain a primary similarity standard change curve set; The 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 processing 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 initial similar standard change curve in the initial 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. represents the starting value of the material change of the i-th initial similar standard change curve, k j represents 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 similar 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. represents 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 material change of the i-th initial similar standard change curve.

8. The method for monitoring and processing 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 similar 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 respectively 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 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 there are identical similar purification process parameters in the similar purification process parameter set, the identical similar purification process parameters are used as target purification process parameters.

9. The method for monitoring and processing 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 the hydrogen purification process, characterized in that: The system comprises: A standard trace substance change coordinate system set construction module 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 ​​for 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; construct 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; 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; the real-time trace substance change curve set is used to perform similarity matching in the standard trace substance change coordinate system set to obtain a real-time similar standard change curve set; A pressure swing adsorption module is used to identify the target purification process parameters corresponding to the real-time similar standard change curve set, wherein the target purification process parameters refer to the target adsorption pressure, the target adsorption time and the target adsorption temperature; according to the target purification process parameters, the preset trace substances are subjected to pressure swing adsorption and it is determined whether the hydrogen purification is completed; A loop judgment module is used to judge 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 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 has been replaced, return to the above 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.

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