Multi-working-condition ortho-parahydrogen continuous conversion test control analysis device
By designing a multi-condition continuous conversion test control and analysis device for n- and para-hydrogen, adjusting the n- and para-hydrogen content and temperature in the raw hydrogen, and detecting the para-hydrogen content in the gas before and after conversion, the problem of liquid hydrogen evaporation caused by the heat of n- and para-hydrogen conversion during hydrogen liquefaction was solved. This provides a testing platform for catalyst performance and heat exchange performance under multiple operating conditions and improves the efficiency of liquid hydrogen storage.
Patent Information
- Application Number
- CN202423112639.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-17
AI Technical Summary
In existing technologies, the heat of conversion caused by the conversion of n- and para-hydrogen during hydrogen liquefaction results in a large amount of liquid hydrogen evaporation, which affects the long-term storage of liquid hydrogen and the energy consumption of liquefaction. It is necessary to add a catalyst during the liquefaction process to promote the conversion of n- and para-hydrogen, but there is a lack of an effective multi-condition continuous conversion test device for n- and para-hydrogen to test the performance of the catalyst.
A multi-condition continuous conversion test control and analysis device for n- and para-hydrogen is designed. The n- and para-hydrogen content in the feed hydrogen is adjusted by a low-pressure liquid hydrogen vaporizer and supporting pipelines. The para-hydrogen content in the gas before and after conversion is detected by an analysis interface. The device provides multiple operating conditions and activates the catalyst through a nitrogen pipeline and heater to prevent freezing and blockage, thereby achieving continuous catalytic conversion.
It enables accurate detection of catalytic reaction rate, space velocity and other data of the positive and negative hydrogen conversion heat exchanger under multiple operating conditions, reduces liquid hydrogen evaporation loss, improves liquid hydrogen storage efficiency, and provides a testing platform for catalyst performance and heat exchange performance in multiple temperature zones.
Smart Images
Figure CN223611458U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of ultralow temperature technology, especially to a multi-working-condition normal and para hydrogen continuous conversion test control analysis device. BACKGROUND
[0002] Hydrogen can be prepared from fossil energy, industrial by-product gas, water and other hydrogen-containing substances, and is an important industrial raw material and energy carrier. Hydrogen energy refers to the energy released by hydrogen in the process of physical and chemical changes, which can be used in industry, power generation, energy storage, transportation fuel, and fields such as natural gas for industrial and civil use.
[0003] Hydrogen mainly exists in the form of a compound, and the usual elemental form is hydrogen gas (H2). Liquid hydrogen is a deep-cooled hydrogen storage method. After compression, hydrogen gas is cooled to below 21 K to become liquid hydrogen, which is then stored in specially designed adiabatic vacuum containers. The density of liquid hydrogen at normal temperature and pressure is 845 times that of gaseous hydrogen, and the volumetric energy density of liquid hydrogen is also several times higher than that of compressed storage, greatly increasing the hydrogen storage capacity of the same volume of hydrogen storage container, and is expected to become the main form of large-scale transportation.
[0004] Normal and para hydrogen conversion is one of the key links of hydrogen liquefaction. The hydrogen molecule H2 composed of two atoms has two states due to the different spin directions of the two hydrogen nuclei. The spin directions of the normal hydrogen (o-H2) are the same, and the spin directions of the para hydrogen (p-H2) are opposite. The equilibrium composition of normal and para states is related to temperature. At normal temperature, the equilibrium hydrogen is a mixture containing 75% normal hydrogen and 25% para hydrogen, which is called normal hydrogen (or standard hydrogen), represented by the symbol n-H2. Above normal temperature, the equilibrium composition of normal and para states remains unchanged. Below normal temperature, the equilibrium composition of normal and para states will change, that is, with the decrease of temperature, the percentage of para hydrogen increases. At standard atmospheric pressure and hydrogen saturation temperature 20.4 K, the para hydrogen concentration of equilibrium hydrogen is 99.8%.
[0005] During the process of hydrogen gradually cooling and liquefying, normal hydrogen will spontaneously convert to para hydrogen and release a large amount of conversion heat, which will cause the vaporization of liquid hydrogen and increase the additional liquefaction energy consumption. This conversion process is not conducive to the long-term storage of liquid hydrogen, and the evaporation amount caused by the conversion heat within one day can even reach more than 20% of the total storage amount, so a catalyst needs to be added during the liquefaction process to promote the conversion process of normal and para hydrogen, and the para hydrogen content in the liquid hydrogen product is generally required to be more than 95% to reduce the liquid hydrogen evaporation loss caused by the conversion of normal and para hydrogen.
[0006] Continuous conversion of normal and para hydrogen is an important link to realize large-scale hydrogen liquefaction. Continuous conversion is to remove the conversion heat of normal and para hydrogen through the cold fluid in the heat exchanger in time, so that the hydrogen gas always maintains the concentration close to the equilibrium hydrogen at the corresponding temperature during the conversion process, and the comprehensive energy consumption of the hydrogen liquefaction system is low.
[0007] From the above, to build a multi-temperature zone variable working condition primary and secondary hydrogen continuous catalytic conversion characteristics test system which can simulate the actual industrial production, to test the continuous catalytic conversion performance of hydrogen in the ultra-low temperature environment of liquid hydrogen temperature zone, catalyst performance and other data, can provide important reference for the design, use and maintenance of primary and secondary hydrogen conversion heat exchanger, so as to promote the development of large-scale hydrogen liquefaction device in gas industry.
[0008] The multi-temperature zone variable working condition primary and secondary hydrogen continuous catalytic conversion characteristics test system should include a multi-working condition primary and secondary hydrogen continuous conversion test control analysis device and a test device for primary and secondary hydrogen conversion, and the design of the multi-working condition primary and secondary hydrogen continuous conversion test control analysis device is a key link, and the purpose of the present application is to provide a multi-working condition primary and secondary hydrogen continuous conversion test control analysis device.
[0009] The information disclosed in this part of the background art is only intended to deepen the understanding of the overall background art of the present application, and should not be regarded as acknowledging or implying in any form that the information constitutes prior art known to those skilled in the art. Content of the present application
[0010] In view of the above, the present application provides a multi-working condition primary and secondary hydrogen continuous conversion test control analysis device, which can adjust the content of primary and secondary hydrogen in raw hydrogen by setting a low-pressure liquid hydrogen vaporizer and a matching pipeline, thereby providing multiple working conditions for the test. The analysis interface is used to connect an analysis device, which detects the content of secondary hydrogen in the gas before and after the conversion of primary and secondary hydrogen. In addition, the analysis interface can also be connected to other instruments as needed, with high flexibility.
[0011] To achieve the above-mentioned purpose, the present application provides the following technical scheme:
[0012] The present application provides a multi-working condition primary and secondary hydrogen continuous conversion test control analysis device, comprising:
[0013] A liquid hydrogen pipeline is connected to the test device for primary and secondary hydrogen conversion; the flow of the liquid hydrogen pipeline is adjustable;
[0014] A low-pressure liquid hydrogen vaporizer, whose liquid inlet is connected to the liquid hydrogen pipeline and whose gas outlet is connected to the raw hydrogen pipeline;
[0015] A raw hydrogen pipeline is connected to the test device;
[0016] An analysis interface is used to connect an analysis device; the analysis device is used to detect the content of secondary hydrogen in the gas before and after the conversion of primary and secondary hydrogen.
[0017] In some embodiments of the present application, the gas outlet of the low-pressure liquid hydrogen vaporizer is also connected to the test device.
[0018] In some embodiments of the utility model, the analysis device includes a primary and secondary hydrogen content chromatographic analyzer.
[0019] In some embodiments of the utility model, the analysis device further includes a dew point meter.
[0020] In some embodiments of the utility model, further include nitrogen pipeline, nitrogen pipeline is connected with raw material hydrogen pipeline.
[0021] In some embodiments of the utility model, nitrogen pipeline is also connected with liquid hydrogen pipeline.
[0022] In some embodiments of the utility model, nitrogen pipeline is connected with test device through nitrogen heater.
[0023] In some embodiments of the utility model, nitrogen heater is electric heater.
[0024] In some embodiments of the utility model, further include venting main pipe.
[0025] In some embodiments of the utility model, nitrogen pipeline is also connected with venting main pipe.
[0026] The utility model embodiment has at least the following advantages or beneficial effects:
[0027] Through the setting of low pressure liquid hydrogen vaporizer and matched pipeline, the primary and secondary hydrogen content in raw material hydrogen can be adjusted, and multiple working condition conditions are provided for test. The analysis interface is used for connecting the analysis device, and the secondary hydrogen content in the gas before and after the conversion of primary and secondary hydrogen is detected through the analysis device. In addition, the analysis interface can also be connected with other instruments according to needs, and the flexibility is high.
[0028] Other features and advantages of the utility model will be described in the subsequent description, and part of them becomes obvious from the description, or is understood by implementing the utility model. DRAWINGS
[0029] In order to more clearly illustrate the technical scheme in the embodiments of the present application or prior art, the drawings needed in the embodiment description will be briefly introduced.
[0030] Figure 1 It is the structural schematic diagram of multi-temperature zone variable working condition primary and secondary hydrogen continuous catalytic conversion characteristic test system.
[0031] Icon:
[0032] 1-test device, 11-ultra-low temperature vacuum cold box, 12-precooling heat exchanger, 121-precooling cold source channel, 122-precooling channel, 123-precooling reheat channel, 13-primary and secondary hydrogen conversion heat exchanger, 131-conversion channel, 132-conversion cold source channel,
[0033] 2-multiple working condition primary and secondary hydrogen continuous conversion test control analysis device, 21-liquid hydrogen pipeline, 22-low pressure liquid hydrogen vaporizer, 23-feed hydrogen pipeline, 24-analysis interface, 25-nitrogen pipeline, 26-nitrogen heater, 27-ventilation main pipe,
[0034] 3-assistant device, 31-molecular pump group. DETAILED DESCRIPTION
[0035] Hereinafter, only some exemplary embodiments are simply described. As can be appreciated by those skilled in the art, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present application.
[0036] In the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integrated; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0037] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
[0038] Referring to Figure 1 The present embodiment provides a multi-temperature-zone variable-working-condition primary and secondary hydrogen continuous catalytic conversion characteristic test system, comprising a test device 1, a multiple working condition primary and secondary hydrogen continuous conversion test control analysis device 2 and an assistant device 3.
[0039] The test device 1 is used to cool the feed hydrogen to a first temperature zone (for example, a 35 K temperature zone) first, and then promote the conversion of primary hydrogen to secondary hydrogen in the feed hydrogen through the primary and secondary hydrogen conversion heat exchanger 13 and cool it to a second temperature zone (for example, a 28 K temperature zone). The test device 1 comprises an ultra-low temperature vacuum cold box 11 with reversible sealing function (openable and closable), and a precooling heat exchanger 12 and a primary and secondary hydrogen conversion heat exchanger 13 which are detachably arranged inside the ultra-low temperature vacuum cold box 11.
[0040] The inside of the ultra-low temperature vacuum cold box 11 can form a dynamic vacuum environment. The ultra-low temperature vacuum cold box 11 is a cylindrical structure, and the top thereof is connected with a matched inlet and outlet pipeline through a forced sealing flange, so that the test device 1 can be integrally disassembled and replaced under the premise of ensuring extremely low leakage rate.
[0041] The precooling heat exchanger 12 is used for cooling the raw hydrogen in the raw hydrogen pipeline 23 to a first temperature zone. In a specific implementation scenario, the precooling heat exchanger 12 is a plate-fin heat exchanger, and can realize multi-channel heat exchange and has good heat exchange effect. The precooling heat exchanger 12 has a precooling cold source channel 121, a precooling channel 122 and a precooling reheat channel 123.
[0042] The precooling cold source channel 121 is used for conveying liquid hydrogen; the precooling heat exchanger 12 uses liquid hydrogen as a cold source.
[0043] The precooling channel 122 is used for cooling the raw hydrogen in the raw hydrogen pipeline 23 to the first temperature zone.
[0044] The precooling reheat channel 123 is used for reheating the gas discharged from the primary and secondary hydrogen conversion heat exchanger 13, and the conversion channel 131 is sequentially connected with the precooling reheat channel 123.
[0045] The primary and secondary hydrogen conversion heat exchanger 13 is used for promoting the conversion of primary hydrogen to secondary hydrogen in the raw hydrogen, and cooling the raw hydrogen to a second temperature zone by taking away the conversion heat in the above conversion process, the second temperature zone being lower than the first temperature zone. In a specific implementation scenario, the primary and secondary hydrogen conversion heat exchanger 13 is a plate-fin heat exchanger, and can realize multi-channel heat exchange and has good heat exchange effect; the primary and secondary hydrogen conversion heat exchanger 13 is detachably arranged in the ultra-low temperature vacuum cold box 11. The primary and secondary hydrogen conversion heat exchanger 13 has a conversion channel 131 and a conversion cold source channel 132 inside.
[0046] The conversion channel 131 is filled with a catalyst for promoting the conversion of primary hydrogen to secondary hydrogen, and the precooling channel 122 is sequentially connected with the conversion channel 131. The catalyst is not limited in the filling manner. Temperature measuring points are arranged at the inlet and outlet of the conversion channel 131. Resistance measuring points are arranged at the inlet and outlet of the conversion channel 131.
[0047] The conversion cold source channel 132 is sequentially connected with the precooling cold source channel 121; the primary and secondary hydrogen conversion heat exchanger 13 uses liquid hydrogen as a cold source, and in this embodiment, preferably, the primary and secondary hydrogen conversion heat exchanger 13 and the precooling heat exchanger 12 use the same cold source in sequence. Temperature measuring points are arranged at the inlet and outlet of the conversion cold source channel 132.
[0048] All hydrogen outlets of the test device 1 are gathered in the venting main pipeline 27, and the tail gas discharged from the test device 1 is vented. It can be understood that, in order to realize safe venting, the tail gas can be reheated by a corresponding heat exchange device before venting.
[0049] The working principle of the test device 1 is as follows: the raw hydrogen gas enters the conversion passage 131 after passing through the raw hydrogen gas pipeline 23 and the pre-cooling passage 122, and is converted into para-hydrogen under the action of the catalyst, and then is reheated through the pre-cooling and reheating passage 123 and discharged through the venting main pipe 27. In the above process, the conversion heat generated is taken away by the liquid hydrogen to realize continuous catalytic conversion. The para-hydrogen content in the gas before and after conversion of the para-hydrogen conversion heat exchanger 13 is continuously detected, and the catalytic reaction rate, space velocity and other results of the para-hydrogen conversion heat exchanger 13 can be calculated in combination with the test operation parameters. In addition, the resistance characteristics of the conversion passage 131 of the para-hydrogen conversion heat exchanger 13 after being filled with the catalyst can be analyzed through the resistance measuring points at the inlet and outlet of the conversion passage 131; and the heat exchange performance of the para-hydrogen conversion heat exchanger 13 can be comprehensively analyzed through the temperature measuring points arranged at each inlet and outlet of the para-hydrogen conversion heat exchanger 13.
[0050] The multi-working-condition para-hydrogen continuous conversion test control and analysis device 2 is used to provide the test device 1 with raw hydrogen gas containing a specified para-hydrogen proportion, provide the test device 1 with a cold source, provide a multi-temperature-zone environment for the test, and detect and analyze the para-hydrogen content in the gas before and after conversion of the para-hydrogen conversion heat exchanger 13. The multi-working-condition para-hydrogen continuous conversion test control and analysis device can adjust the para-hydrogen proportion in the raw hydrogen gas and the temperature zone in which the raw hydrogen gas is converted into para-hydrogen. The multi-working-condition para-hydrogen continuous conversion test control and analysis device 2 comprises a liquid hydrogen pipeline 21, a low-pressure liquid hydrogen vaporizer 22, a raw hydrogen gas pipeline 23, an analysis interface 24, a nitrogen gas pipeline 25, a nitrogen gas heater 26 and a venting main pipe 27.
[0051] The liquid hydrogen pipeline 21, the conversion cold source passage 132, the pre-cooling cold source passage 121 and the venting main pipe 27 are sequentially connected. The flow rate of the liquid hydrogen pipeline 21 is adjustable. In a specific implementation scenario, the outlet of the conversion cold source passage 132 can also be directly connected with the venting main pipe 27.
[0052] The liquid phase inlet of the low-pressure liquid hydrogen vaporizer 22 is connected with the liquid hydrogen pipeline 21, and the low-pressure liquid hydrogen vaporizer 22 vaporizes the liquid hydrogen to obtain liquid hydrogen vapor; and the gas phase outlet of the low-pressure liquid hydrogen vaporizer 22 is directly or indirectly connected with the raw hydrogen gas pipeline 23 and the conversion cold source passage 132.
[0053] The raw hydrogen gas pipeline 23, the pre-cooling passage 122, the conversion passage 131, the pre-cooling and reheating passage 123 and the venting main pipe 27 are sequentially connected.
[0054] The analysis interface 24 is used to connect an analysis device, which is used to detect the content of para-hydrogen in the gas before and after the para-hydrogen conversion heat exchanger 13, and detect the water content in the system pipeline; wherein, the purpose of testing the water content is to check the purging effect of the pipeline of the whole system. In a specific implementation scenario, the analysis device includes a para-hydrogen content chromatographic analyzer and a dew point instrument; the para-hydrogen content chromatographic analyzer is used to continuously detect the content of para-hydrogen in the gas before and after the para-hydrogen conversion heat exchanger 13; and the dew point instrument is used to continuously detect the water content in the system pipeline.
[0055] The nitrogen pipeline 25 is used to provide nitrogen for purging the specified pipeline and activating the catalyst in the conversion channel 131, wherein the purpose of purging the specified pipeline is to remove water vapor and prevent freezing. In a specific implementation scenario, the raw material hydrogen pipeline 23, the liquid hydrogen pipeline 21, the conversion channel 131, and the venting main pipe 27 are all connected with the nitrogen pipeline 25 to remove water vapor in the whole system and prevent freezing.
[0056] The nitrogen heater 26 connects the nitrogen pipeline 25 and the conversion channel 131 to activate the catalyst in the conversion channel 131 by using heated nitrogen. In a specific implementation scenario, the nitrogen heater 26 is an electric heater.
[0057] The working principle of the above-mentioned multi-working-condition para-hydrogen continuous conversion test control analysis device 2 is that the catalyst in the conversion channel 131 is activated by using heated nitrogen. The specified pipeline is purged by the nitrogen pipeline 25 to remove water vapor in the whole system and prevent freezing. By setting the low-pressure liquid hydrogen vaporizer 22 and the matching pipeline, the mixing ratio of the liquid hydrogen vaporization gas in the raw material hydrogen can be adjusted, so as to adjust the content of para-hydrogen in the raw material hydrogen, provide multiple working conditions for the test, and at the same time, the temperature zone for para-hydrogen conversion can be adjusted by adjusting the liquid hydrogen flow, so as to provide multiple temperature zone conditions for the test, so as to explore the continuous catalytic conversion performance of the catalyst under multiple working conditions and multiple temperature zone conditions, and the catalytic performance and heat exchange performance of the para-hydrogen conversion heat exchanger 13.
[0058] The auxiliary device 3 is used to establish a dynamic high-vacuum environment in the internal cavity of the ultralow-temperature vacuum cold box 11, so as to ensure that the multiple temperature zone conditions of liquid hydrogen are realized, thereby providing a multiple temperature zone environment for the test. In a specific implementation scenario, the auxiliary device 3 includes a molecular pump group 31 connected with the ultralow-temperature vacuum cold box 11.
[0059] The above-mentioned devices and components are connected through process pipelines and valves, and the low-temperature pipelines and valves are all coated with a heat preservation layer to reduce the cold loss of the whole system.
[0060] In combination with the above, the working principle of the above-mentioned multi-temperature zone variable working condition para-hydrogen continuous catalytic conversion characteristic test system is as follows:
[0061] The raw hydrogen gas containing the specified ratio of primary and secondary hydrogen is introduced into the conversion passage 131 after passing through the raw hydrogen gas pipeline 23 and the pre-cooling passage 122, and the primary hydrogen is converted into the secondary hydrogen under the action of the catalyst, and then the raw hydrogen gas is reheated through the pre-cooling and reheating passage 123 and discharged through the discharge header 27. In the above process, the conversion heat generated is taken away by the liquid hydrogen to realize continuous catalytic conversion. Before being discharged through the discharge header 27, the content of the secondary hydrogen in the gas before and after conversion in the primary and secondary hydrogen conversion heat exchanger 13 is continuously detected through the analysis interface 24, and the catalytic reaction rate and space velocity of the primary and secondary hydrogen conversion heat exchanger 13 can be calculated in combination with the test operation parameters. In addition, the resistance characteristics of the primary and secondary hydrogen conversion heat exchanger 13 after the conversion passage 131 is filled with the catalyst can be analyzed through the resistance measuring points at the inlet and outlet of the conversion passage 131, and the heat exchange performance of the primary and secondary hydrogen conversion heat exchanger 13 can be comprehensively analyzed through the temperature measuring points arranged at each inlet and outlet of the primary and secondary hydrogen conversion heat exchanger 13. The above system can provide multiple temperature zones and multiple working conditions for the test, and obtain the data of the continuous catalytic conversion performance, the catalyst performance and the heat exchange performance of the raw hydrogen gas in the ultra-low temperature environment of the liquid hydrogen temperature zone, thereby providing important references for the design, use and maintenance of the primary and secondary hydrogen conversion heat exchanger 13.
[0062] In combination with the above, the present embodiment has at least the following beneficial effects:
[0063] I. The multi-working-condition primary and secondary hydrogen continuous conversion test control and analysis device (the low-pressure liquid hydrogen vaporizer 22 and the matched pipeline) can adjust the mixing ratio of the liquid hydrogen vaporization gas in the raw hydrogen gas, thereby adjusting the content of the primary and secondary hydrogen in the raw hydrogen gas, and providing multiple working conditions for the test.
[0064] II. The multi-working-condition primary and secondary hydrogen continuous conversion test control and analysis device can adjust the temperature zone (achieved by adjusting the liquid hydrogen flow) of the raw hydrogen gas for the primary and secondary hydrogen conversion, thereby providing multiple temperature zones for the test, so as to explore the continuous catalytic conversion performance of the catalyst in the primary and secondary hydrogen conversion heat exchanger 13 under multiple working conditions and multiple temperature zones, and the heat exchange performance of the primary and secondary hydrogen conversion heat exchanger 13.
[0065] III. The primary and secondary hydrogen conversion heat exchanger 13 has the conversion passage 131 and the conversion cold source passage 132, the conversion passage 131 is filled with the catalyst for promoting the conversion of the primary hydrogen into the secondary hydrogen, and the conversion cold source passage 132 is connected with the pre-cooling cold source passage 121, that is, the primary and secondary hydrogen conversion heat exchanger 13 integrates the functions of the primary and secondary hydrogen conversion and heat exchange, and can promote the conversion of the primary hydrogen in the raw hydrogen gas into the secondary hydrogen, and take away the conversion heat in the above conversion process, so as to perform the continuous catalytic conversion test.
[0066] IV. The arrangement of the ultra-low temperature vacuum cold box 11 enables the test device 1 to pre-cool the primary and secondary hydrogen conversion heat exchanger 13 device through the cold source (liquid hydrogen) in the environment of high vacuum and low radiation, and create an ultra-low temperature test environment for the primary and secondary hydrogen conversion heat exchanger 13.
[0067] V. By setting the ultra-low temperature vacuum cold box 11, the test device 1 (the internal cavity of the ultra-low temperature vacuum cold box 11) can be established by the auxiliary device 3 to establish a dynamic high vacuum environment, so as to ensure that the multi-temperature zone condition of liquid hydrogen is realized, thereby providing the required multi-temperature zone environment for the test.
[0068] It should be noted that in the embodiment, the first temperature zone is a 35 K temperature zone, and the second temperature zone is a 28 K temperature zone, and in other embodiments, the first temperature zone and the second temperature zone can include a specified temperature zone in the 80 K ~ 28 K temperature range. As known from the foregoing, the adjustment of the temperature zone can be realized by adjusting the liquid hydrogen flow.
[0069] VI. As known from the foregoing, the primary and secondary hydrogen conversion heat exchanger 13 has different catalyst filling modes, and the primary and secondary hydrogen conversion heat exchanger 13 can be disassembled and replaced. By replacing the primary and secondary hydrogen conversion heat exchanger 13 with different catalyst filling modes, the continuous catalytic conversion performance of the catalyst under different catalyst filling modes can be tested, and the catalytic performance and heat exchange performance of the primary and secondary hydrogen conversion heat exchanger 13 under the liquid hydrogen temperature zone can be tested.
[0070] VII. By the resistance measuring point of the inlet and outlet of the conversion channel 131, the resistance characteristics of the conversion channel 131 of the primary and secondary hydrogen conversion heat exchanger 13 after filling the catalyst are analyzed. By arranging the temperature measuring point at each inlet and outlet of the primary and secondary hydrogen conversion heat exchanger 13, the heat exchange performance of the primary and secondary hydrogen conversion heat exchanger 13 is analyzed, thereby providing an important reference for the design, use and maintenance of the primary and secondary hydrogen conversion heat exchanger 13. The present application builds a test platform (referring to the above system) for the characteristics of gas in the liquid hydrogen multi-temperature zone ultra-low temperature environment, which has the advantages of wide working condition range, multiple working condition types, simple operation, reliable data, etc.
[0071] Finally, it should be noted that the above is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and variations, and in the case of no conflict, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A multi-service primary and secondary hydrogen continuous conversion test control analysis device, characterized in that, The utility model relates to a kind of hydrogen isomerization test device, comprising: Liquid hydrogen pipeline is connected with the test device for primary-secondary hydrogen conversion;The flow of the liquid hydrogen pipeline is adjustable; Low-pressure liquid hydrogen vaporizer, its liquid phase import is connected with the liquid hydrogen pipeline, and gas phase export is connected with raw material hydrogen pipeline; Raw material hydrogen pipeline is connected with the test device; Analysis interface is used to connect analysis device;The analysis device is used to detect the content of secondary hydrogen in gas before and after primary-secondary hydrogen conversion.
2. The multi-service primary and secondary hydrogen continuous conversion test control analysis device according to claim 1, characterized in that, The gas phase export of the low-pressure liquid hydrogen vaporizer is also connected with the test device.
3. The multi-service primary and secondary hydrogen continuous conversion test control analysis device according to claim 1, characterized in that, The analysis device includes primary-secondary hydrogen content chromatographic analyzer.
4. The multi-service primary and secondary hydrogen continuous conversion test control analysis device according to claim 3, characterized in that, The analysis device also includes dew point meter.
5. The apparatus according to any one of claims 1 to 4, wherein It also includes nitrogen pipeline;The nitrogen pipeline is connected with the raw material hydrogen pipeline.
6. The multi-service primary and secondary hydrogen continuous conversion test control analysis device according to claim 5, characterized in that, The nitrogen pipeline is also connected with the liquid hydrogen pipeline.
7. The multi-service primary and secondary hydrogen continuous shift test control analysis device according to claim 5, characterized by, The nitrogen pipeline is connected with the test device through nitrogen heater.
8. The multi-service primary and secondary hydrogen continuous conversion test control analysis device according to claim 7, characterized in that, The nitrogen heater is electric heater.
9. The multi-service primary and secondary hydrogen continuous shift conversion test control analysis device according to claim 5, characterized by, It also includes venting main pipe.
10. The multi-service primary and secondary hydrogen continuous conversion test control analysis device according to claim 9, characterized in that, The nitrogen pipeline is also connected with the venting main pipe.