CN112610891B - Device and method for catalytic conversion of normal para-hydrogen with activation function - Google Patents
Device and method for catalytic conversion of normal para-hydrogen with activation function Download PDFInfo
- Publication number
- CN112610891B CN112610891B CN202011506309.XA CN202011506309A CN112610891B CN 112610891 B CN112610891 B CN 112610891B CN 202011506309 A CN202011506309 A CN 202011506309A CN 112610891 B CN112610891 B CN 112610891B
- Authority
- CN
- China
- Prior art keywords
- hydrogen
- para
- normal
- stop valve
- conversion device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/34—Hydrogen distribution
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Inorganic Chemistry (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
According to the normal-para-hydrogen catalytic conversion device with the activation function and the method, the normal-para-hydrogen catalytic conversion device, the heating rod and the lifting motor are fixedly arranged on the container cover, the normal-para-hydrogen catalytic conversion device and the heating rod are fixedly arranged below the container cover, and the lifting motor is fixedly arranged above the container cover through the lifting rod; the normal-para-hydrogen conversion device is connected with a vacuum pump through a vacuum connecting pipeline; the heat preservation container is arranged below the container cover and is used for accommodating the para-hydrogen conversion device and the heating rod. The hydrogen sample with different para-hydrogen contents can be obtained through catalytic conversion efficiently and rapidly, the catalyst is activated when necessary, the operation is convenient, the reliability is high, the popularization is facilitated, the descending rate of the para-hydrogen conversion device in the precooling medium is accurately controlled remotely by the automatic device through setting the lower flow limit, and the air back suction is prevented.
Description
Technical Field
The invention belongs to the technical field of Zhong Qingqi body analysis in the hydrogen energy application and liquid hydrogen production processes, and particularly relates to an n-para-hydrogen catalytic conversion device and method with an activation function.
Background
Along with the increasing severity of global climate environment protection situation, the pressure to cope with climate change is continuously increased, hydrogen energy is attracting attention worldwide, and energy supply reform becomes a hot spot of current social politics, economy and technology attention. According to the research report of the future development trend of hydrogen energy issued by the international hydrogen energy committee, the demand of hydrogen energy is expected to be 10 times that of the current demand in 2050.
The utilization of hydrogen energy needs to solve a series of problems such as preparation, storage, transportation and application, and the large-scale storage and transportation is the bottleneck and key of hydrogen energy application. The volumetric energy density of the liquid hydrogen is 3 times that of 35MPa hydrogen and 1.8 times that of 70MPa hydrogen. If the cost of hydrogen liquefaction is greatly reduced by adopting a large-scale efficient liquefaction technology through low-cost use, the cost advantage of liquid hydrogen storage and transportation is more obvious. The liquid hydrogen has the advantages of large hydrogen carrying density, low transportation cost, high hydrogen storage purity, better safety of liquid low-pressure storage and use than large-scale high-pressure gaseous form, and the like, the large-scale supply of hydrogen is mainly liquid hydrogen supply, and the large-scale application of hydrogen energy in China is also required to follow the route, thus being an effective way for solving the problems of low-cost and high-efficiency storage, transportation and supply of hydrogen energy.
Meanwhile, china is currently carrying out important special projects of people-carrying spaceflight, deep space exploration, heavy carrier rocket development and the like, and a large amount of liquid hydrogen is used in the development and application stages of the projects. Only with advanced design and manufacturing capabilities of the hydrogen liquefaction system, the subsequent major engineering projects can be stably and safely developed.
The liquefying temperature of the hydrogen is very low, and the hydrogen can be liquefied only after being cooled below a certain temperature, but the cooling and liquefying process of the hydrogen needs to consume a large amount of energy, so that the defects of low liquefying efficiency and high energy consumption are caused.
Hydrogen is a diatomic molecule, and two hydrogen nuclei are rotated about an axis. Depending on the relative direction of the two nuclear spins, the hydrogen molecules can be divided into orthohydrogen and para-hydrogen. The normal hydrogen is a mixture of these two forms of hydrogen molecules, the equilibrium concentration of normal para-hydrogen is only dependent on temperature, and hydrogen at different temperatures where the normal para-hydrogen concentration reaches a stable equilibrium is called equilibrium hydrogen. At a temperature above room temperature, the hydrogen content is 75% and the para-hydrogen content is 25%. The equilibrium concentration of para-hydrogen at the liquid hydrogen saturation temperature of 20.4K is 99.82%. The normal secondary conversion in the hydrogen liquefaction process is an exothermic reaction, and the heat evolved in the conversion is related to the temperature at the time of conversion. In order to reduce the evaporation loss of liquid hydrogen storage caused by the exothermic heat of conversion of normal para-hydrogen, it is generally required that the para-hydrogen content in the liquid hydrogen product is above 95%.
Therefore, one of the main indicators of hydrogen liquefaction is the para-hydrogen content, which is to be determined according to the process requirements. The key point of the para-hydrogen content determination is that a normal para-hydrogen conversion device is required to be equipped, a catalyst is contained in the para-hydrogen conversion device to obtain the para-hydrogen content at a specific temperature, the para-hydrogen content is taken as a standard sample, the para-hydrogen content and a liquid hydrogen sample are analyzed and determined by using a thermal conductivity gas chromatography analysis method, and the para-hydrogen content in the sample is calculated by a standard curve method or a calculation coefficient method. In addition, in some scientific researches, hydrogen samples with different para-hydrogen contents are also required to be obtained for research and test.
Currently, the existing patent (ZL 201320161523.5) proposes a device for conversion of normal para-hydrogen, which has two problems affecting the para-hydrogen content result during use.
First, the catalyst has a post-activation sealing problem. In the use of the catalyst, no matter when the catalytic efficiency is reduced due to misoperation or long-term use, the catalyst needs to be re-activated for subsequent use, but in the patent, the whole device needs to be detached from an original system and then connected to a gas circuit special for activation when the catalyst is activated, and the catalyst is heated by a heating furnace, is activated for more than 6 hours, can be detached after being cooled to room temperature, and is re-installed in a measuring system. If the dismantling process is slow in action and poor in sealing work, excessive air enters the conversion column, so that the catalyst is low in conversion efficiency and cannot be used normally.
Secondly, during the use process, the catalyst efficiency is reduced or the catalyst is invalid due to improper soaking. The device needs to soak the conversion column into liquid nitrogen manually by a person, the accurate control of the gas flow rate or the cooling rate cannot be realized in the manual soaking process, if the soaking speed is too fast, air suck-back can be caused, the catalyst efficiency is affected, the current operation can be invalid, and the conversion operation can be carried out again after the catalyst is activated; however, although the slow soaking speed can be controlled by observing the flow rate, the manual operation has great influence on subjective factors, has high requirements on the proficiency of personnel, and generally has great influence on the measurement result of the secondary hydrogen content.
Disclosure of Invention
In view of this, the present disclosure proposes a normal-para-hydrogen catalytic conversion device and method with an activation function, by integrating the normal-para-hydrogen catalytic conversion device with the activation device, the step of disassembling the normal-para-hydrogen catalytic conversion device when activating the normal-para-hydrogen conversion agent (normal-para-hydrogen catalyst) is eliminated, the activated normal-para-hydrogen catalytic conversion catalyst is ensured to be still prevented from contacting air in the closed system, and the effectiveness of the activation operation and the flexibility of switching the use state are ensured; through setting up the low limit of flow, the automatic device is long-range accurate control positive parahydrogen conversion device's decline rate in precooling medium, prevents the air suck-back.
According to an aspect of the present invention, there is provided a normal-para-hydrogen catalytic conversion apparatus having an activation function, the apparatus comprising: the device comprises a primary-secondary hydrogen conversion device, a heat preservation container, a container cover, a heating rod, a lifting motor, a lifting rod, a vacuum pump and a vacuum connecting pipeline; the device comprises a container cover, a normal-para-hydrogen conversion device, a heating rod and a lifting motor, wherein the normal-para-hydrogen conversion device, the heating rod and the lifting motor are fixedly arranged on the container cover; the normal para-hydrogen conversion device is connected with the vacuum pump through the vacuum connecting pipeline; the heat preservation container is arranged below the container cover and is used for accommodating the normal-para-hydrogen conversion device and the heating rod.
In one possible implementation, the normal para-hydrogen conversion device includes: the device comprises a gas inlet pipeline, a flow regulating valve, an electronic flowmeter, a first stop valve, a threading connector, a precooling pipeline, a conversion column, a normal para-hydrogen catalytic converter, a precooling medium auxiliary inlet, a temperature sensor, a gas outlet pipeline, a third stop valve and a second stop valve arranged on the vacuum connecting pipeline;
The gas outlet pipeline is connected to the outlet of the normal-para-hydrogen conversion device through the third stop valve; the gas inlet pipeline is connected with the pre-cooling pipeline through a through-board connector sequentially through the flow regulating valve, the electronic flowmeter and the first stop valve; the temperature sensor is connected with the conversion column through the container cover perforation, the normal para-hydrogen catalytic conversion agent is filled below the conversion column, the precooling pipeline is wound on the surface of the conversion column, and the precooling pipe is connected with the conversion column through the bottom perforation of the conversion column.
In one possible implementation manner, the container cover is made of a heat-insulating low-temperature-resistant material, and is provided with a heating rod through hole, a conversion column through hole, a board penetrating joint through hole and a fixing seat connected with the lifting motor on the surface.
In one possible implementation manner, a precooling medium auxiliary inlet perforation is further arranged on the surface of the container cover and is used for injecting precooling medium into the heat-preserving container.
In one possible implementation, the insulated container is 1 or more; when the number of the heat-insulating containers is plural, the heat-insulating containers include heat-resistant containers and low-temperature-resistant containers.
In one possible implementation, the apparatus further includes: a display and control system;
the control system is electrically connected with the heating rod, the lifting motor, the temperature sensor, the electronic flowmeter and the vacuum pump, and the display is used for displaying the gas flow measured by the electronic flowmeter, the temperature of the conversion column detected by the temperature sensor and the working parameters of the automatic normal-para-hydrogen catalytic conversion device.
In one possible implementation, the control system includes a touch screen control and a key control.
In one possible implementation, the lifting motor is a table motor, a ceiling motor or a side-hung motor, and has a rotation function.
In one possible implementation manner, the shape of the heating rod is any one of a straight rod type, a U type and a disc type; the first stop valve, the second stop valve and the third stop valve are needle valves or ball valves.
According to another aspect of the present disclosure, there is provided a method for catalytic conversion of normal para-hydrogen with an activation function, the method comprising:
Under the room temperature condition, connecting hydrogen into a gas inlet pipeline, closing a second stop valve, opening a first stop valve and a third stop valve, adjusting a flow regulating valve to enable the hydrogen to reach a preset value, and purging the normal-secondary hydrogen conversion device for a certain time;
controlling the container cover to rise to the upper limit height, and injecting a precooling medium into the heat-preserving container by the conversion column above the heat-preserving container opening; controlling the container cover to descend, and ensuring that the hydrogen flow is higher than a preset flow lower limit value in the process of descending the container cover to cover the heat-preserving container; when the container cover is lowered to the lower limit height and the temperature of the temperature sensor is stable, detecting the temperature of the heat preservation container by using the temperature sensor, and when the temperature displayed by the temperature sensor is higher than the temperature of the pre-cooling medium by more than 1 ℃, supplementing the pre-cooling medium through the pre-cooling medium auxiliary adding port to cool the heat preservation container to the temperature of the pre-cooling medium; when the content of para-hydrogen in the hydrogen passing through the gas outlet pipeline reaches a value corresponding to the temperature of the precooling medium, completing the conversion of ortho-para-hydrogen;
And controlling the container cover to rise to the upper limit height, pouring out the precooling medium in the heat-preserving container, closing the second stop valve, opening the first stop valve and the third stop valve, connecting hydrogen into the gas inlet pipeline to purge the normal parahydrogen conversion device, and re-warming the heat-preserving container and the normal parahydrogen conversion device to room temperature.
In one possible implementation, the method further includes: activating the positive para-hydrogen catalytic converter when the catalytic conversion efficiency of the positive para-hydrogen catalytic converter is reduced;
Activating the normal para-hydrogen catalytic converter, comprising: and after purging the normal-secondary hydrogen conversion device for a certain time, sequentially closing the first stop valve, the third stop valve and the flow regulating valve, opening the second stop valve, controlling the vacuum pump to vacuumize the normal-secondary hydrogen catalytic conversion device, starting the heating rod to heat to a preset temperature, stopping the heating rod, closing the second stop valve, controlling the container cover to rise to an upper limit height, stopping the vacuum pump when the temperature in the heat-insulating container reaches room temperature, sequentially opening the first stop valve and the flow regulating valve, filling hydrogen through the gas inlet pipeline, and closing the first stop valve and the flow regulating valve when the activation of the normal-secondary hydrogen catalytic conversion agent is finished.
In one possible implementation, the pre-cooling medium is at least one of ice-water mixture, liquefied natural gas, propane, liquid ammonia, liquid carbon dioxide, liquid oxygen, liquid nitrogen.
The normal-para-hydrogen catalytic conversion device with the activation function comprises a normal-para-hydrogen conversion device, a heat preservation container, a container cover, a heating rod, a lifting motor, a lifting rod, a vacuum pump and a vacuum connecting pipeline; the device comprises a container cover, a secondary hydrogen conversion device, a heating rod and a lifting motor, wherein the secondary hydrogen conversion device, the heating rod and the lifting motor are fixedly arranged on the container cover; the normal-para-hydrogen conversion device is connected with a vacuum pump through a vacuum connecting pipeline; the heat preservation container is arranged below the container cover and is used for accommodating the para-hydrogen conversion device and the heating rod. The method has the advantages that the step of disassembling and assembling the normal-para-hydrogen conversion device during the activation of the normal-para-hydrogen catalyst can be avoided by integrating the normal-para-hydrogen conversion device and the activation device, so that the activated normal-para-hydrogen catalyst is prevented from contacting air in the closed system, and the effectiveness of the activation operation and the flexibility of switching the use state are ensured; through setting up the low limit of flow, the automatic device is long-range accurate control positive parahydrogen conversion device's decline rate in precooling medium, prevents the air suck-back. The hydrogen samples with different para-hydrogen contents can be obtained efficiently and rapidly through catalytic conversion, and the catalyst is activated when necessary, so that the method is convenient to operate, high in reliability and beneficial to popularization.
Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features and aspects of the present disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1 illustrates a schematic diagram of a normal-para-hydrogen catalytic conversion device with activation functionality according to one embodiment of the present disclosure;
Fig. 2 illustrates a block diagram of a vessel cover of a normal para-hydrogen catalytic conversion device having an activation function according to another embodiment of the present disclosure;
fig. 3 shows a schematic process diagram of a normal para-hydrogen catalytic conversion process with activation functionality according to an embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments, features and aspects of the disclosure will be described in detail below with reference to the drawings. In the drawings, like reference numbers indicate identical or functionally similar elements. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
In addition, numerous specific details are set forth in the following detailed description in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements, and circuits well known to those skilled in the art have not been described in detail in order not to obscure the present disclosure.
Fig. 1 shows a schematic structural diagram of an orthopara-hydrogen catalytic conversion device with an activation function according to an embodiment of the present disclosure.
As shown in fig. 1, the apparatus may include the apparatus including: the device for converting normal para-hydrogen, a heat preservation container 21, a container cover 16, a heating rod 24, a lifting motor 9, a lifting rod 12, a vacuum pump 23 and a vacuum connecting pipeline 17. The device for converting the normal and secondary hydrogen, the heating rod 24 and the lifting motor 9 are fixedly arranged on the container cover 16, the device for converting the normal and secondary hydrogen and the heating rod 24 are fixedly arranged below the container cover 16, and the lifting motor 9 is fixedly arranged above the container cover 16 through the lifting rod 2; the normal para-hydrogen conversion device is connected with a vacuum pump 23 through a vacuum connecting pipeline 17; a thermal insulation container 21 is provided below the container cover 16, and accommodates a para-hydrogen conversion device and a heating rod 24.
In addition, the device may also include a display and control system (both shown in FIG. 1). Wherein the control system is implemented by a control integrated circuit. The control system may be electrically connected to the heater bar 24 through the heater bar signal line 1, the hoist motor signal line 2, the hoist motor 9, the temperature sensor signal line 3, the electronic flow meter signal line 10, the electronic flow meter 8, and the vacuum pump power signal line 20 to the vacuum pump 23. The control system can be touch screen control or key control, and can send out instructions through touch screen or key operation, so that the device can automatically perform corresponding operation.
The display can be used for displaying the gas flow rate measured by the electronic flowmeter 8, the temperature of the conversion column 22 detected by the temperature sensor 13, the working parameters of the automatic device for the normal-para-hydrogen catalytic conversion and the like, and providing corresponding parameters for an automatic control system so as to control the normal-para-hydrogen catalytic conversion device more accurately.
Fig. 2 illustrates a block diagram of a vessel cover of a normal para-hydrogen catalytic conversion device having an activation function according to another embodiment of the present disclosure.
As shown in fig. 2, the container cover 16 is made of a heat-insulating and low-temperature-resistant material. The surface of the container cover 16 is provided with a precooling medium auxiliary feeding port 14 perforation, a heating rod 24 perforation, a conversion column 22 perforation, a threading joint 15 perforation and a fixing seat connected with the lifting rod 12, wherein the precooling medium auxiliary feeding port perforation is used for injecting precooling medium into the heat-preserving container.
As shown in fig. 1, the normal-para-hydrogen conversion device includes a gas inlet line 7, a flow rate control valve 6, an electronic flowmeter 8, a first shutoff valve 11, a threading connector 15, a pre-cooling line 18, a conversion column 22, a normal-para-hydrogen catalytic converter 25, a temperature sensor 13, a gas outlet line 5, a third shutoff valve 4, and a second shutoff valve 19 provided on a vacuum connection line 17.
The gas outlet pipeline 5 is connected to the outlet of the conversion column 22 through the third stop valve 4. The gas inlet pipeline 7 is connected with a precooling pipeline 18 through a flow regulating valve 6, an electronic flowmeter 8 and a first stop valve 11 in sequence through a threading connector 15; the temperature sensor 13 is connected with the conversion column 22 through the perforation of the container cover 16, the normal para-hydrogen catalytic converter 25 is filled below the conversion column 22, the precooling pipeline 18 is wound on the surface of the conversion column 22, and the precooling pipeline 18 is connected with the conversion column 22 through the perforation at the bottom of the conversion column 22.
In an example, the number of the thermal insulation containers 21 may be 1 or more, and when the number of the thermal insulation containers 21 is plural, the thermal insulation containers 21 may include a heat-resistant container and a low-temperature-resistant container.
For example, the temperature of the thermal container 21 is in the range of-200℃to 150 ℃. When the number of the heat-insulating containers 21 is one, the heat-resistant and low-temperature-resistant container is adopted. When the number of the heat insulating containers 21 is plural, two types of heat resistant containers and low temperature resistant containers may be included. The heat-resistant container is used for activating the normal-para-hydrogen catalyst, and the low-temperature-resistant container is used for normal-para-hydrogen cooling conversion operation. Different temperature conditions of the insulated container 21 are obtained by heating the heating rod or adding a pre-cooling medium to the container. The precooling medium can be at least one of ice-water mixture, LNG (Liquefied Natural Gas ), propane, liquid ammonia and liquid carbon dioxide, liquid oxygen and liquid nitrogen.
In an example, the lifting motor 9 is a table motor, a ceiling motor or a side-hanging motor, and has a rotation function; the heating rod 24 is in any one of a straight rod type, a U type and a disk type; the first stop valve 11, the second stop valve 19, and the third stop valve 4 are valves having a throttle function such as needle valves or ball valves. The types of the lifting motor 9 and the second shut-off valve 19 are not limited one by one, and the shape of the heating rod 24 is not limited one by one as long as the device meets the requirements.
The normal-para-hydrogen conversion device, the heating rod 24 and the lifting motor 9 are fixedly arranged on the container cover 16, the normal-para-hydrogen conversion device and the heating rod 24 are fixedly arranged below the container cover 16, and the lifting motor 9 is fixedly arranged above the container cover 16 through the lifting rod 12; the normal para-hydrogen conversion device is connected with a vacuum pump 23 through a vacuum connecting pipeline 17; a thermal insulation container 21 is provided below the container cover 16, and accommodates a para-hydrogen conversion device and a heating rod 24. The method has the advantages that the step of disassembling and assembling the normal-para-hydrogen conversion device during the activation of the normal-para-hydrogen catalyst can be avoided by integrating the normal-para-hydrogen conversion device and the activation device, so that the activated normal-para-hydrogen catalyst is prevented from contacting air in the closed system, and the effectiveness of the activation operation and the flexibility of switching the use state are ensured; through setting up the low limit of flow, the automatic device is long-range accurate control positive parahydrogen conversion device's decline rate in precooling medium, prevents the air suck-back. The hydrogen samples with different para-hydrogen contents can be obtained efficiently and rapidly through catalytic conversion, and the catalyst is activated when necessary, so that the method is convenient to operate, high in reliability and beneficial to popularization.
The invention also provides a method for the catalytic conversion of the normal para-hydrogen with an activation function, which can efficiently and quickly obtain hydrogen samples with different para-hydrogen contents and can activate the catalyst.
Fig. 3 shows a schematic process diagram of a normal para-hydrogen catalytic conversion process with activation functionality according to an embodiment of the present disclosure. As shown in fig. 3, the method may include: the hydrogen is purged to the normal para-hydrogen conversion device, the temperature is reduced to the pre-cooling medium temperature for conversion, and the specific processes are respectively as follows:
under the room temperature condition, connecting hydrogen into a gas inlet pipeline 7, closing a second stop valve 19, opening a first stop valve 11 and a third stop valve 4, regulating a flow regulating valve 6 to enable the hydrogen to reach a preset value, and purging the primary-secondary hydrogen conversion device for a certain time;
Inputting a control command to control the container cover 16 to rise to the upper limit height, and injecting a precooling medium into the heat-preserving container 21 by the conversion column 22 above the opening of the heat-preserving container 21 (the conversion column 22 is completely lifted above the opening of the heat-preserving container 21); inputting a control command to the control system through the display to control the container cover 16 to descend, and ensuring that the hydrogen gas flow rate is higher than a preset flow rate lower limit value in the process of descending the container cover 16 to cover the heat-preserving container 21; when the temperature of the heat preservation container 21 is higher than the temperature of the pre-cooling medium by more than 1 ℃ and the pre-cooling medium is supplemented by the pre-cooling medium auxiliary inlet 14, the temperature of the heat preservation container 21 is reduced to the temperature of the pre-cooling medium, and when the para-hydrogen content in the hydrogen passing through the gas outlet pipeline reaches a value corresponding to the temperature of the pre-cooling medium, the conversion of normal para-hydrogen is completed, and the state can be kept for corresponding application, such as para-hydrogen content measurement.
The pre-cooling medium is at least one of ice-water mixture, liquefied natural gas, propane, liquid ammonia, liquid carbon dioxide, liquid oxygen and liquid nitrogen, and is not limited herein.
For example, during a slow descent of the container lid 16, the descent rate is linked to the display value of the electronic flowmeter 8, ensuring that the hydrogen flow is always above the set lower flow limit. If the flow rate is lower than the set lower limit, the hydrogen gas flow rate is immediately raised to the set upper limit and then slowly lowered, and the above steps are repeated until the container cover 16 completely covers the heat-insulating container 21.
The temperature value of the temperature sensor 13 is observed by using a display screen (not shown in the figure), if the temperature value is higher than the pre-cooling medium temperature by more than 1 ℃, the pre-cooling medium is supplemented from the pre-cooling medium auxiliary inlet 14 until the temperature value of the heat preservation container 21 approaches the temperature of the pre-cooling medium and tends to be stable, so as to be used later.
By correlating the lowering rate of the lifting motor 9 in the heat insulating container 21 with the flow rate of hydrogen passing through the normal para-hydrogen conversion device, the lowering rate of the lifting motor 9 can be precisely controlled, and air suck-back can be prevented.
The container cover 16 is controlled to rise to the upper limit height, the precooling medium in the heat-preserving container 21 is poured out, the second stop valve 19 is closed, the first stop valve 11 and the third stop valve 4 are opened, hydrogen is connected into the gas inlet pipeline 7 to purge the normal para-hydrogen conversion device, and the heat-preserving container and the normal para-hydrogen conversion device are naturally rewarmed to room temperature, so that the rewarming purpose is achieved.
By setting the lower flow limit value, the descending rate of the lifting motor in the low-temperature container is related to the hydrogen flow rate passing through the primary-secondary hydrogen conversion device, so that the automatic control program can accurately control the descending rate of the primary-secondary hydrogen conversion device in the precooling medium to prevent air from being sucked backwards.
In addition, when the catalytic conversion efficiency of the normal-para-hydrogen catalytic converter 25 is lowered by long-term use or misoperation, the method can perform an activating operation on the normal-para-hydrogen catalytic converter 25, specifically:
Connecting hydrogen into a gas inlet pipeline 7, closing a second stop valve 19, opening a first stop valve 11 and a third stop valve 4, regulating a flow regulating valve 6 to enable the hydrogen to reach a preset value, purging a primary and secondary hydrogen conversion device for a certain time, sequentially closing the first stop valve 11, the third stop valve 4 and the flow regulating valve 6, covering a container cover 16, opening the second stop valve 19, controlling a vacuum pump 23 to vacuumize a conversion column 22 of the primary and secondary hydrogen catalytic conversion device, starting a heating rod 24 to heat to the preset temperature, keeping the constant temperature for 6h, stopping the heating rod 24, closing the second stop valve 19, controlling the container cover 16 to rise to the upper limit height, stopping the vacuum pump 23 to vacuumize when the temperature in a heat preservation container 21 reaches room temperature, sequentially opening the first stop valve 11 and the flow regulating valve 6, filling hydrogen through the gas inlet pipeline 7, and closing the first stop valve 11 and the flow regulating valve 6 when activation of the primary and secondary hydrogen conversion agent 25 is finished.
For example, the container lid 16 is lowered into the empty insulated container 21 using a display to input control commands to an automated control system until fully closed. Hydrogen is connected into the gas inlet pipeline 7, the second stop valve 19 is closed, the first stop valve 11, the third stop valve 4 and the flow regulating valve 6 are opened, the flow of the hydrogen is regulated to a required value, and the hydrogen is purged for a certain time. And leak detection is performed on the joints of the pipe fittings, after tightness is ensured, the third stop valve 4, the first stop valve 11 and the flow regulating valve 6 are sequentially closed, a control command for starting the vacuum pump 23 is input, the vacuum pump 23 is operated, and then the second stop valve 19 is opened. By inputting a control command for heating the heating rod 24, the heating rod 24 is started to be heated, and during the heating process, the start-stop operation of the heating rod 24 is associated with the temperature of the temperature sensor 13, and when the set temperature is reached, the heating is stopped, and the heating is started below the set temperature by a certain gap. When the activation is finished, the heating rod 24 is controlled to stop working, the second stop valve 19 is closed, the container cover 16 is controlled to rise to the set upper limit height, the vacuum pump 23 is stopped when the temperature of the temperature sensor 13 reaches the room temperature, the flow regulating valve 6 and the first stop valve 11 are sequentially opened to fill hydrogen, and when the activation is finished, the flow regulating valve 6 and the first stop valve 11 are sequentially closed.
The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvements in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (7)
1. An apparatus for the catalytic conversion of normal para-hydrogen with an activation function, said apparatus comprising: the device comprises a primary-secondary hydrogen conversion device, a heat preservation container, a container cover, a heating rod, a lifting motor, a lifting rod, a vacuum pump and a vacuum connecting pipeline; wherein the normal-para-hydrogen conversion device and the heating rod are fixedly arranged below the container cover, the lifting motor is fixedly arranged above the container cover through the lifting rod; the normal para-hydrogen conversion device is connected with the vacuum pump through the vacuum connecting pipeline; the heat preservation container is arranged below the container cover and is used for accommodating the normal-para-hydrogen conversion device and the heating rod;
The normal para-hydrogen conversion device comprises: the device comprises a gas inlet pipeline, a flow regulating valve, an electronic flowmeter, a first stop valve, a threading connector, a precooling pipeline, a conversion column, a normal para-hydrogen catalytic converter, a precooling medium auxiliary inlet, a temperature sensor, a gas outlet pipeline, a third stop valve and a second stop valve arranged on the vacuum connecting pipeline;
the gas outlet pipeline is connected to the outlet of the normal-para-hydrogen conversion device through the third stop valve; the gas inlet pipeline is connected with the pre-cooling pipeline through a through-board connector sequentially through the flow regulating valve, the electronic flowmeter and the first stop valve; the temperature sensor is connected with the conversion column through the container cover perforation, the normal-para-hydrogen catalytic conversion agent is filled below the conversion column, the precooling pipeline is wound on the surface of the conversion column, and the precooling pipe is connected with the conversion column through the bottom perforation of the conversion column;
The container cover is made of heat-insulating low-temperature-resistant materials, and the surface of the container cover is provided with a heating rod perforation, a conversion column perforation, a board penetrating connector perforation and a fixing seat connected with the lifting motor;
the surface of the container cover is also provided with a precooling medium auxiliary inlet perforation for injecting precooling medium into the heat preservation container;
The apparatus further comprises: a display and control system;
The control system is electrically connected with the heating rod, the lifting motor, the temperature sensor, the electronic flowmeter and the vacuum pump, and the display is used for displaying working parameters of the positive para-hydrogen catalytic conversion device.
2. The normal para-hydrogen catalytic converter according to claim 1, wherein the number of the heat-retaining containers is 1 or more; when the number of the heat-insulating containers is plural, the heat-insulating containers include heat-resistant containers and low-temperature-resistant containers.
3. The positive para-hydrogen catalytic converter according to claim 1, wherein the control system comprises a touch screen control and a key control.
4. The apparatus according to claim 1, wherein the lifting motor is a table motor, a ceiling motor, or a side-mounted motor, and has a rotation function.
5. The normal-para-hydrogen catalytic converter according to claim 1, wherein the shape of the heating rod is any one of a straight rod type, a U-shape, and a disk shape; the first stop valve, the second stop valve and the third stop valve are needle valves or ball valves.
6. A method for the catalytic conversion of normal para-hydrogen with an activating function, said method comprising:
under the room temperature condition, connecting hydrogen into a gas inlet pipeline, closing a second stop valve, opening a first stop valve and a third stop valve, regulating a flow regulating valve to enable the hydrogen to reach a preset value, and purging the primary-secondary hydrogen conversion device for a certain time;
Controlling the container cover to rise to the upper limit height, and injecting a precooling medium into the heat-preserving container above the heat-preserving container opening by the conversion column; controlling the container cover to descend, and ensuring that the hydrogen gas flow rate is higher than a preset flow lower limit value in the process of descending the container cover to cover the heat-preserving container; when the temperature of the container cover is lowered to the lower limit height and the temperature of the temperature sensor is stable, detecting the temperature of the heat preservation container by using the temperature sensor, when the temperature displayed by the temperature sensor is higher than the temperature of the pre-cooling medium by more than 1 ℃, supplementing the pre-cooling medium through the auxiliary adding port of the pre-cooling medium, cooling the heat preservation container to the temperature of the pre-cooling medium, and when the secondary hydrogen content in the hydrogen passing through the gas outlet pipeline reaches a value corresponding to the temperature of the pre-cooling medium, completing the conversion of the normal secondary hydrogen;
controlling the container cover to rise to the upper limit height, pouring out the precooling medium in the heat-preserving container, closing the second stop valve, opening the first stop valve and the third stop valve, connecting hydrogen into the gas inlet pipeline to purge the normal parahydrogen conversion device, and re-warming the heat-preserving container and the normal parahydrogen conversion device to room temperature;
The method further comprises the steps of: activating the normal-para-hydrogen catalytic converter when the catalytic conversion efficiency of the normal-para-hydrogen catalytic converter is reduced;
activating the normal para-hydrogen catalytic converter, comprising: and after purging the normal secondary hydrogen conversion device for a certain time, sequentially closing the first stop valve, the third stop valve and the flow regulating valve, opening the second stop valve, controlling the vacuum pump to vacuumize the normal secondary hydrogen conversion device, starting the heating rod to heat to a preset temperature, stopping the heating rod, closing the second stop valve, controlling the container cover to rise to an upper limit height, stopping the vacuum pump when the temperature in the heat-preserving container reaches room temperature, sequentially opening the first stop valve and the flow regulating valve, filling hydrogen through the gas inlet pipeline, and closing the first stop valve and the flow regulating valve when the activation of the normal secondary hydrogen catalytic conversion agent is finished.
7. The method for catalytic conversion of normal para-hydrogen according to claim 6, wherein the pre-cooling medium is at least one of an ice water mixture, liquefied natural gas, propane, liquid ammonia, liquid carbon dioxide, liquid oxygen, liquid nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011506309.XA CN112610891B (en) | 2020-12-18 | 2020-12-18 | Device and method for catalytic conversion of normal para-hydrogen with activation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011506309.XA CN112610891B (en) | 2020-12-18 | 2020-12-18 | Device and method for catalytic conversion of normal para-hydrogen with activation function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112610891A CN112610891A (en) | 2021-04-06 |
| CN112610891B true CN112610891B (en) | 2024-10-01 |
Family
ID=75240647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011506309.XA Active CN112610891B (en) | 2020-12-18 | 2020-12-18 | Device and method for catalytic conversion of normal para-hydrogen with activation function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112610891B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115199950B (en) * | 2022-08-25 | 2024-12-24 | 北京航天试验技术研究所 | A high-pressure liquid hydrogen delivery system and method capable of suppressing supercritical transition |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212157863U (en) * | 2020-05-22 | 2020-12-15 | 北京飞斯科科技有限公司 | Portable low-temperature equipment for polarizing hydrogen |
| CN215446033U (en) * | 2020-12-18 | 2022-01-07 | 北京航天试验技术研究所 | Paraffin hydrogen catalytic conversion device with activation function |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318793C (en) * | 2002-11-04 | 2007-05-30 | 亚太燃料电池科技股份有限公司 | Hydrogen storage tank hydrogen charging and activation treatment device |
| US7179379B2 (en) * | 2003-03-28 | 2007-02-20 | Ab-Cwt, Llc | Apparatus for separating particulates from a suspension, and uses thereof |
| WO2005041368A2 (en) * | 2003-10-24 | 2005-05-06 | Blacklight Power, Inc. | Novel molecular hydrogen gas laser |
| CN103836333B (en) * | 2012-11-27 | 2016-08-17 | 北京航天试验技术研究所 | A kind of parahydrogen adiabatic conversion refrigerating plant |
| CN106979664B (en) * | 2017-03-06 | 2019-09-20 | 毛恒松 | Atmospheric carbon dioxide liquifying method |
| CN111470472A (en) * | 2019-01-24 | 2020-07-31 | 中国科学院大连化学物理研究所 | A self-testable ortho-parahydrogen conversion device |
| CN209741326U (en) * | 2019-04-19 | 2019-12-06 | 杭州青简科技有限公司 | bamboo charcoal activation device is used in bamboo fibre processing |
| CN110848559B (en) * | 2019-11-26 | 2025-03-18 | 上海理工大学 | A supercritical liquid hydrogen storage system |
| CN211399319U (en) * | 2019-12-27 | 2020-09-01 | 南通科源电力设备有限公司 | Gaseous built-in heating activation processing apparatus of SF6 |
| JP6705071B1 (en) * | 2020-03-04 | 2020-06-03 | 正通 亀井 | Wide area power supply system |
-
2020
- 2020-12-18 CN CN202011506309.XA patent/CN112610891B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212157863U (en) * | 2020-05-22 | 2020-12-15 | 北京飞斯科科技有限公司 | Portable low-temperature equipment for polarizing hydrogen |
| CN215446033U (en) * | 2020-12-18 | 2022-01-07 | 北京航天试验技术研究所 | Paraffin hydrogen catalytic conversion device with activation function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112610891A (en) | 2021-04-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5934081A (en) | Cryogenic fluid cylinder filling system | |
| CN112326501B (en) | A hydrogen storage material multiple performance testing system and testing method | |
| CN107449728A (en) | A kind of HTHP supercritical carbon dioxide homogeneous corrosion pilot system | |
| CN107884435B (en) | A device for measuring thermal conductivity of materials in a high-pressure gas environment | |
| KR100947109B1 (en) | Cryogenic Component Tester | |
| KR101445751B1 (en) | Using a cryogenic fluid heat exchanger valve leakage measuring device | |
| CN112610891B (en) | Device and method for catalytic conversion of normal para-hydrogen with activation function | |
| CN208000301U (en) | Liquefied petroleum gas sampling device and liquefied petroleum gas sample introduction equipment | |
| CN215446033U (en) | Paraffin hydrogen catalytic conversion device with activation function | |
| CN113030151B (en) | Device and method for testing liquefaction rate of low-temperature gas liquefaction device | |
| Phelps et al. | A new experimental facility for investigating the formation and properties of gas hydrates under simulated seafloor conditions | |
| US3938391A (en) | Sampling device for liquefied gases | |
| CN108700258A (en) | Method for cooling down the first low-temperature pressure container | |
| CN101008470A (en) | Process and arrangement for filling high pressure gas containers using a filling tube | |
| CN109655131B (en) | Visual experiment system for liquid phase pipeline of differential pressure type liquid level meter of low-temperature container | |
| CN113984937B (en) | Device and method for testing catalytic performance of catalyst for para-hydrogen reaction | |
| CN201322708Y (en) | Ultra-low temperature Charpy-type test cooling device | |
| CN110345378A (en) | A kind of experimental provision of the non-equilibrium gas-liquid two-phase pipeline flowing of test liquefied natural gas | |
| CN105203596B (en) | Low-temperature gas explosion characteristic test system | |
| CN214407702U (en) | Ultralow-temperature liquid static mass method calibrating device | |
| CN115931454A (en) | Portable liquid natural gas sampling device | |
| US12174156B1 (en) | Device for testing reaction between supercritical carbon dioxide and rock | |
| CN111505047A (en) | Device for Measuring Thermal Conductivity of High Temperature and High Pressure Multicomponent Gas Mixtures | |
| CN117147745A (en) | Liquid hydrogen solid-air preparation and testing device and method thereof | |
| CN209081830U (en) | Liquid light aromatic gasification equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20210406 Assignee: Aerospace Hydrogen Energy Technology Co.,Ltd. Assignor: BEIJING INSTITUTE OF AEROSPACE TESTING TECHNOLOGY Contract record no.: X2022990000160 Denomination of invention: A catalytic conversion device and method of normal and secondary hydrogen with activation function License type: Exclusive License Record date: 20220317 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |