Hydrogen production hydrogen performance integrated detection system and detection method thereof

Abstract

The invention discloses a hydrogen production and hydrogen performance integrated detection system and a detection method thereof.The hydrogen production and hydrogen performance integrated detection system comprises a purification pipeline system, a detection system and a remote control terminal; the primary separation structure and the secondary separation structure in the tube are used for separating, adsorbing and purifying hydrogen, the performance of the hydrogen is accurately detected at the front tube or the rear tube through the gas chromatograph, and the other detection modules are used for acquiring temperature and pressure data in the tube and hydrogen performance data obtained by the spectrograph; the data modeling module establishes a performance change rule before and after hydrogen is purified by the purification pipeline system, the data prediction module predicts accurate hydrogen performance data after purification, the accurate hydrogen performance data is converted and compared with real-time detection data of a spectrograph in subsequent production, and whether the performance of the purified hydrogen reaches the standard or not is monitored. And the safe operation capability from hydrogen production to hydrogen use in the hydrogenation station and the dynamic, automatic and precise monitoring level of the hydrogen production performance are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen production detection in hydrogen refueling stations. More specifically, the present invention relates to an integrated hydrogen production performance detection system and a detection method thereof. Background Art

[0002] An in-station hydrogen production hydrogen refueling station is a special hydrogen refueling station, which is characterized by setting hydrogen production equipment inside the hydrogen refueling station for on-site hydrogen production. After the hydrogen production is completed, it will pass through a purification system for purification, then be compressed by a compressor and stored in a hydrogen storage tank, and finally be filled into a fuel cell vehicle through a hydrogen dispenser. The working principle of the in-station hydrogen production hydrogen refueling station is to produce hydrogen by electrolyzing water. Generally, two electrodes are immersed in an alkaline solution, and a DC voltage is applied between the electrodes to cause water to decompose into hydrogen and oxygen. Although in-station hydrogen production has obvious economic costs, for the hydrogen production system, not only the floor space problem needs to be considered, but also the hydrogen production performance problem needs to be considered. At present, the detection means are relatively single, relying on equipment such as gas chromatographs to sample at intervals to detect the hydrogen performance before entering the hydrogen storage bottle. The detection efficiency is not high, and it belongs to passive detection, unable to predict hydrogen leakage or unqualified hydrogen performance in advance, resulting in potential safety problems. Summary of the Invention

[0003] An object of the present invention is to solve at least the above problems and provide at least the advantages described hereinafter.

[0004] Another object of the present invention is to provide an integrated hydrogen production performance detection system and a detection method thereof to solve the technical problem of the lag in the detection ability of the in-station hydrogen production performance of hydrogen refueling stations in the prior art.

[0005] To achieve these objects and other advantages of the present invention, on the one hand, the present invention provides an integrated hydrogen production performance detection system, including: A purification pipeline system, which includes a diversion pipe. The inlet end of the diversion pipe is hermetically connected to a section of pre-pipe, and the pre-pipe is communicated with the hydrogen outlet of the hydrogen production machine. The outlet end of the diversion pipe is hermetically connected to a section of middle-pipe. An initial separation structure is arranged in the middle-pipe for adsorbing and removing impurities in the hydrogen. The outlet end of the middle-pipe is hermetically connected to a branched pipe. A secondary separation structure is arranged in the branched pipe. The outlet end of the branched pipe is hermetically and communicatively connected to a section of post-pipe, and the outlet end of the post-pipe is hermetically connected to a gas buffer container for subsequent connection to a pressurization device; Detection module, which includes a gas chromatograph, a spectrometer, a temperature sensor, and a pressure sensor. The gas chromatograph is used to detect the hydrogen performance in the pre-pipe or post-pipe. The spectrometer is used to detect the concentration of gas components in the pipe. The temperature sensor is used to detect the temperature in the pipe. The pressure sensor is used to detect the pressure in the pipe. A set of spectrometers are respectively arranged corresponding to the positions near the outlet ends of the pre-pipe, the middle-pipe, and the split-pipe. Temperature sensors and pressure sensors are respectively arranged in the pre-pipe, the middle-pipe, and the split-pipe. Remote control terminal, which includes a display terminal and a data acquisition module, a data modeling module, a data prediction module, and a data analysis module that are respectively electrically connected to the display terminal. The display terminal is used to display the received data. The data acquisition module is respectively communicatively connected to the gas chromatograph, the spectrometer, the temperature sensor, and the pressure sensor, and is used to obtain the corresponding detection parameter data and respectively transmit them to the data modeling module and the data prediction module. The data modeling module is used to establish a performance change model of the prepared hydrogen before and after passing through the purification pipeline system according to the received detection data and the size of the purification pipeline system. The data prediction module is used to predict the predicted data of the hydrogen performance in the corresponding state under the set temperature and pressure conditions by using the performance change model, and send it to the data analysis module. The data analysis module is used to set data thresholds, obtain the acquisition data of the data acquisition module, and at the same time compare the predicted data.

[0006] Preferably, the remote control terminal further includes an alarm module for sending out alarms. Threshold ranges are respectively set for the data of each of the temperature sensor, the pressure sensor, the gas chromatograph, and the spectrometer. When the data analysis module determines that the threshold is exceeded, it sends a signal to the alarm module.

[0007] Preferably, the diversion pipe is a spiral pipe, and the split-pipe includes a plurality of oppositely arranged C-shaped pipes.

[0008] Preferably, the length of the spiral pipe is not less than 4 times the axial length.

[0009] Preferably, the primary separation structure is used for gas-liquid separation, and the secondary separation structure is used for adsorption and impurity removal.

[0010] On the other hand, the present invention also provides an integrated detection method for the performance of hydrogen produced by hydrogen production, including the following steps: S1. Use the gas chromatograph to sample and detect in the pre-pipe or post-pipe in the early stage of the detection cycle to obtain reference data. The data acquisition module obtains the detection data on the purification pipeline system in real time from the detection module, including the temperature data detected by the temperature sensor, the in-pipe pressure data detected by the pressure sensor, the hydrogen and impurity concentration data detected by the spectrometer, and obtains accurate sampling data by using the gas chromatograph, and transmits it to the data modeling module. Input the size parameters of the purification pipeline system into the data modeling module, and establish a dynamic change model of the hydrogen performance during the flow of hydrogen in the purification pipeline system through the data modeling module; S2. During on-line detection, the data acquisition module collects the corresponding temperature data, pressure data, and hydrogen performance data in real time and transmits them to the data prediction module. Use the dynamic change model to output the accurate target data of the hydrogen performance under the corresponding detection parameters, and transmit it to the data analysis module. Set the threshold range for target data comparison in the data analysis module, and compare the target data with the real-time collected hydrogen concentration and purity detection data; S3. When the threshold range is exceeded, an alarm is issued through the alarm module.

[0011] Preferably, before modeling in the data modeling module, sample in the pre-pipe and the post-pipe, and use a gas chromatograph to detect the initial purity of hydrogen entering the middle pipe to establish the dynamic change model. For the split pipe, the hydrogen concentration in the post-pipe is the sum of the hydrogen concentrations detected in the split pipe.

[0012] The present invention has at least the following beneficial effects: The integrated hydrogen performance detection system for hydrogen production of the present invention includes a purification pipeline system, a detection system arranged on the purification pipeline system, and a remote control terminal for monitoring and utilizing the detection data of the detection system. The purification pipeline system is set to divert the prepared hydrogen, and the hydrogen is separated and adsorbed and purified through the primary separation structure and the secondary separation structure in the pipe. The gas chromatograph is set to accurately detect the hydrogen performance at the pre-pipe or post-pipe, and the other detection modules obtain the in-pipe temperature, pressure data and the hydrogen performance data obtained by the spectrometer. The data modeling module establishes the change law of the hydrogen performance before and after the hydrogen is purified through the purification pipeline system. The data prediction module predicts the accurate hydrogen performance data at the corresponding pipeline position after purification, and compares it with the real-time detection data of the spectrometer in the subsequent production through conversion, monitors whether the performance of the hydrogen after purification meets the standard, improves the safe operation ability from hydrogen production to hydrogen use in the hydrogen refueling station, reduces the difficulty of traditional interval sampling detection that completely relies on the gas chromatograph, and can correspond to the actual pipeline conditions, improving the dynamic, automatic and accurate monitoring level of the hydrogen production performance.

[0013] Other advantages, objects, and features of the present invention will be partially reflected in the following description and partially understood by those skilled in the art through the research and practice of the present invention. Brief Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of the flow direction of hydrogen-making gas in the integrated hydrogen-making hydrogen performance detection system of the present invention; Figure 2 It is a schematic structural diagram of the connection setting of the integrated hydrogen-making hydrogen performance detection system of the present invention. Detailed Description of the Preferred Embodiments

[0015] The following further detailed description of the present invention is made in conjunction with the accompanying drawings, so that those skilled in the art can implement it according to the description in the specification.

[0016] It should be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified; in the description of the present invention, the terms "horizontal", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

[0017] As Figure 1-2 shown, the present invention provides an integrated hydrogen-making hydrogen performance detection system, including: A purification pipeline system, which includes a diversion pipe. The inlet end of the diversion pipe is hermetically connected to a section of pre-pipe, and the pre-pipe is communicated with the hydrogen outlet of the hydrogen-making machine. The outlet end of the diversion pipe is hermetically connected to a section of middle-pipe. An initial separation structure is arranged in the middle-pipe for adsorbing and removing impurities in the hydrogen. The outlet end of the middle-pipe is hermetically connected to a branched pipe. A secondary separation structure is arranged in the branched pipe. The outlet end of the branched pipe is hermetically connected and communicated with a section of post-pipe, and the outlet end of the post-pipe is hermetically connected to a gas buffer container for subsequent connection to a pressurization device; A detection module, which includes a gas chromatograph, a spectrometer, a temperature sensor, and a pressure sensor. The gas chromatograph is used to detect the hydrogen performance in the pre-pipe or post-pipe, the spectrometer is used to detect the concentration of the gas components in the pipe, the temperature sensor is used to detect the temperature in the pipe, and the pressure sensor is used to detect the pressure in the pipe. A set of spectrometers are respectively arranged corresponding to the positions near the outlet ends of the pre-pipe, middle-pipe, and branched pipe, and temperature sensors and pressure sensors are respectively arranged in the pre-pipe, middle-pipe, and branched pipe; Remote control terminal, which includes a display terminal and a data acquisition module, a data modeling module, a data prediction module, and a data analysis module that are electrically connected to the display terminal respectively. The display terminal is used to display the received data. The data acquisition module is communicatively connected to a gas chromatograph, a spectrometer, a temperature sensor, and a pressure sensor respectively, and is used to obtain corresponding detection parameter data and transmit them to the data modeling module and the data prediction module respectively. The data modeling module is used to establish a performance change model of the prepared hydrogen before and after passing through the purification pipeline system according to the received detection data and the size of the purification pipeline system. The data prediction module is used to predict the predicted data of the hydrogen performance in the corresponding state by using the performance change model under the set temperature and pressure conditions, and send it to the data analysis module. The data analysis module is used to set data thresholds, obtain the acquisition data of the data acquisition module, and compare the predicted data at the same time.

[0018] Set the purification pipeline system to divert the prepared hydrogen. A gas-liquid separator can be set in the middle pipe of the purification pipeline system, which is mainly used to remove liquid impurities. A corresponding solid adsorbent or other impurity removal structures can be set in the branch pipes to remove gaseous impurities such as oxygen, sulfide, and organic compounds. For the important parameters of temperature and pressure that affect impurity removal and hydrogen performance, temperature sensors and pressure sensors are respectively set in the front pipe, middle pipe, and branch pipes of the management system. The rear pipe is used as a transition pipe section connected to the subsequent gas buffer container. A spectrometer is set for the front pipe to detect the initial performance of the hydrogen entering the purification pipeline system, the hydrogen concentration and the corresponding impurity concentration. The gas entering the diversion pipe from the front pipe, under the action of the diversion pipe, enhances the flow uniformity and even further plays an accelerating role in the hydrogen production gas, so that the hydrogen production gas maintains a certain flow rate in the middle pipe, passes through more evenly and stably, and makes the impurities better adsorbed and removed. After the hydrogen production gas removes the liquid impurities, the hydrogen concentration and the remaining impurity situation are detected by a spectrometer at the outlet end of the middle pipe. The gas after impurity removal passes through the branch pipes, specifically removes gaseous impurities, and the hydrogen concentration is detected by the spectrometer at the branch pipes. For a large number of gaseous impurities, multiple annularly connected branch pipes can be set to divert the gas, increase the contact area, remove impurities respectively, and improve the purification and impurity removal efficiency.

[0019] During the purification process of the hydrogen gas obtained by hydrogen production through the purification pipeline system, the detection data on which the data modeling module is based can have an acquisition cycle within the normal working hours of the primary separation structure and the secondary separation structure, so as to fully simulate the gas state changes within the normal operation cycle. The performance of hydrogen gas is accurately detected by the gas chromatograph set at the front pipe or the rear pipe. Since the gas chromatograph has a high detection cost and a long time consumption, but the detection result is more accurate, the gas chromatograph samples once from the front pipe or the rear pipe. The data acquisition module obtains the detection data of the other detection modules in real time, corresponding to the accurate data detected by the gas chromatograph at the same moment. Under the determined temperature and pressure in the pipe, the gas passes through the primary separation structure and the secondary separation structure. The data modeling module establishes the change rules of the hydrogen purity and concentration states before and after purification of hydrogen gas after passing through the purification pipeline system for a period of time. The data prediction module predicts the accurate hydrogen gas performance data at the corresponding pipeline position after purification, and through the data analysis module, under the correspondence with the temperature, pressure, and spectrometer detection data detected in real time during subsequent production, assuming the hydrogen gas accurate data state that can be obtained by the gas chromatograph for comparison. A comparison threshold is set in the data analysis module to understand the possible problems that may occur during the hydrogen purification process, whether the purification pipeline system is operating normally, and whether the hydrogen gas can reach the required state standard before pressurization after passing through the purification pipeline system. The spectrometer detects outside the pipe to reduce the sampling frequency of the gas chromatograph and reduce the detection difficulty. All data is displayed and operated on the display terminal for visual management by the staff.

[0020] In another technical solution, as Figure 1-2 shown, the remote control terminal further includes an alarm module for issuing an alarm. Threshold ranges are respectively set for the data of each of the temperature sensor, the pressure sensor, the gas chromatograph, and the spectrometer. When the data analysis module determines that the threshold is exceeded, it sends a signal to the alarm module. Through the alarm module, when the hydrogen gas is not in the normal purification state after purification, an alarm is automatically issued.

[0021] In another technical solution, as Figure 1-2 shown, the diversion pipe is a spiral pipe, and the branch pipe includes a plurality of oppositely arranged C-shaped pipes. Setting the spiral pipe can, on the one hand, divert and accelerate the passing gas, and on the other hand, make the gas flow evenly, improving the separation efficiency of the primary separation structure. The C-shaped pipes appropriately extend the gas flow path to form a circulation, increasing the contact area between the gas and the secondary separation structure and improving the fluidity.

[0022] In another technical solution, as Figure 1-2 shown, based on the diffusion rates between gases of different components, the length of the spiral pipe is not less than 4 times the axial length.

[0023] In another technical solution, as Figure 1-2As shown, the primary separation structure is used for gas-liquid separation, and the secondary separation structure is used for adsorption and impurity removal. The gas-liquid separator is selected as the primary separation structure. For different electrolysis or other hydrogen production methods, the secondary separation structure is provided with solid adsorbents corresponding to the types of gaseous impurities to remove impurities and improve the purification efficiency.

[0024] The present invention also provides an integrated detection method for the hydrogen production performance of hydrogen, which combines Figure 1 As shown, it includes the following steps: S1. Use the gas chromatograph to sample and detect in the pre-pipe or post-pipe in the early stage of the detection cycle to obtain reference data. The data acquisition module obtains the detection data on the purification pipeline system from the detection module in real time, including the temperature data detected by the temperature sensor, the in-pipe pressure data detected by the pressure sensor, the hydrogen and impurity concentration data detected by the spectrometer, and uses the gas chromatograph to obtain accurate sampling data, which is transmitted to the data modeling module. The size parameters of the purification pipeline system are input into the data modeling module, and a dynamic change model of the hydrogen performance during the flow of hydrogen in the purification pipeline system is established through the data modeling module.

[0025] S2. During on-line detection, the data acquisition module collects the corresponding temperature data, pressure data, and hydrogen performance data in real time and transmits them to the data prediction module. The dynamic change model is used to output the accurate target data of the hydrogen performance under the corresponding detection parameters and transmit them to the data analysis module. A threshold range for comparing the target data is set in the data analysis module, and the target data is compared with the hydrogen concentration and purity detection data collected in real time.

[0026] S3. When the threshold range is exceeded, an alarm is issued through the alarm module.

[0027] In another technical solution, as Figure 1-2 shown, before modeling in the data modeling module, samples are taken in the pre-pipe and the post-pipe, and the gas chromatograph is used to detect the initial purity of hydrogen entering the middle pipe to establish the dynamic change model. For the split pipe, the hydrogen concentration in the post-pipe is the sum of the hydrogen concentrations detected in the split pipe.

[0028] The hydrogen production performance integrated detection system and its detection method of the present invention integrate a temperature sensor, a pressure sensor, a spectrometer, and a gas chromatograph as detection modules, which are correspondingly arranged at corresponding positions in the purification pipeline system to monitor the hydrogen purification process of the prepared hydrogen, establish a dynamic change model of the hydrogen performance during the flow process of the purification pipeline system, use the detection data of the gas chromatograph as the accurate data benchmark for hydrogen performance detection, predict the hydrogen purification result during on-line detection, set a threshold value for comparison by using a data analysis module to ensure that the purity of the hydrogen after preparation and purification meets the standard, and improve the safe operation ability of hydrogen production to hydrogen use in the hydrogen refueling station.

[0029] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily achieved. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated and described examples here.

Claims

1. An integrated hydrogen production hydrogen performance detection system, characterized in that Comprising: A purification pipeline system, which includes a diversion pipe. The inlet end of the diversion pipe is hermetically connected to a section of pre-positioned pipe, and the pre-positioned pipe communicates with the hydrogen outlet of the hydrogen generator. The outlet end of the diversion pipe is hermetically connected to a section of middle-positioned pipe. An initial separation structure is arranged in the middle-positioned pipe for adsorbing and removing impurities in the hydrogen. The outlet end of the middle-positioned pipe is hermetically connected to a branched pipe. A secondary separation structure is arranged in the branched pipe. The outlet end of the branched pipe is hermetically connected and communicated with a section of post-positioned pipe, and the outlet end of the post-positioned pipe is hermetically connected to a gas buffer container for subsequent connection to a pressurization device; A detection module, which includes a gas chromatograph, a spectrometer, a temperature sensor, and a pressure sensor. The gas chromatograph is used to detect the hydrogen performance in the pre-positioned pipe or the post-positioned pipe. The spectrometer is used to detect the concentration of the gas components in the pipe. The temperature sensor is used to detect the temperature in the pipe. The pressure sensor is used to detect the pressure in the pipe. A set of spectrometers are respectively arranged corresponding to the positions near the outlet ends of the pre-positioned pipe, the middle-positioned pipe, and the branched pipe. Temperature sensors and pressure sensors are respectively arranged in the pre-positioned pipe, the middle-positioned pipe, and the branched pipe; A remote control terminal, which includes a display terminal and a data acquisition module, a data modeling module, a data prediction module, and a data analysis module that are respectively electrically connected to the display terminal. The display terminal is used to display the received data. The data acquisition module is respectively communicatively connected to the gas chromatograph, the spectrometer, the temperature sensor, and the pressure sensor for acquiring corresponding detection parameter data and respectively transmitting them to the data modeling module and the data prediction module. The data modeling module is used to establish a performance change model of the prepared hydrogen before and after passing through the purification pipeline system according to the received detection data and the size of the purification pipeline system. The data prediction module is used to predict the predicted data of the hydrogen performance in the corresponding state under the set temperature and pressure conditions by using the performance change model and send it to the data analysis module. The data analysis module is used to set data thresholds, acquire the acquisition data of the data acquisition module, and simultaneously compare the predicted data.

2. The integrated hydrogen production hydrogen performance detection system according to claim 1, wherein The remote control terminal further includes an alarm module for issuing an alarm. Threshold ranges are respectively set for the data of each of the temperature sensor, the pressure sensor, the gas chromatograph, and the spectrometer. When the data analysis module determines that the threshold is exceeded, it sends a signal to the alarm module.

3. The integrated hydrogen production hydrogen performance detection system according to claim 1, characterized in that The diversion pipe is a spiral pipe, and the branched pipe includes a plurality of oppositely arranged C-shaped pipes.

4. The integrated hydrogen production hydrogen performance detection system according to claim 3, characterized in that The length of the spiral pipe is not less than 4 times the axial length.

5. The integrated hydrogen production hydrogen performance detection system according to claim 1, characterized in that The initial separation structure is used for gas-liquid separation, and the secondary separation structure is used for adsorption and impurity removal.

6. The integrated hydrogen production hydrogen performance detection method according to claim 2, characterized in that Including the following steps: S1. Use the gas chromatograph to sample and detect in the pre-pipe or post-pipe in the early stage of the detection cycle to obtain reference data. The data acquisition module obtains the detection data on the purification pipeline system in real time from the detection module, including the temperature data detected by the temperature sensor, the in-pipe pressure data detected by the pressure sensor, the hydrogen and impurity concentration data detected by the spectrometer, and obtains accurate sampling data using the gas chromatograph, and transmits it to the data modeling module. Input the size parameters of the purification pipeline system into the data modeling module, and establish a dynamic change model of the hydrogen performance during the flow of hydrogen in the purification pipeline system through the data modeling module; S2. During on-line detection, the data acquisition module real-time collects the corresponding temperature data, pressure data, and hydrogen performance data and transmits them to the data prediction module. Use the dynamic change model to output the accurate target data of the hydrogen performance under the corresponding detection parameters, and transmit it to the data analysis module. Set the threshold range for comparing the target data in the data analysis module, and compare the target data with the real-time collected hydrogen concentration and purity detection data; S3. When the threshold range is exceeded, an alarm is issued through the alarm module.

7. The integrated hydrogen production hydrogen performance detection method according to claim 6, wherein, Before modeling in the data modeling module, sample in the pre-pipe and the post-pipe, and use the gas chromatograph to detect the initial purity of hydrogen entering the middle pipe to establish the dynamic change model. For the separated pipes, the hydrogen concentration in the post-pipe is the sum of the hydrogen concentrations detected in the separated pipes.

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