A control device and method for the dew point of a high-pressure hydrogen test

Abstract

An embodiment of the present application provides a control device and method for the dew point of a high-pressure hydrogen test. The control device includes a gas source, a moisture generation kettle, a dew point adjustment kettle, a test kettle, and a controller. The output end of the gas source is connected to the input end of the moisture generation kettle, the output end of the moisture generation kettle is connected to the dew point adjustment kettle, the dew point adjustment kettle is communicated with the test kettle, and the test kettle and the dew point adjustment kettle are connected to the controller. The embodiment of the present application has the characteristics of simple structure, high pressure and high temperature resistance through the moisture generation kettle, the dew point adjustment kettle, the test kettle, the dew point control and the control system. At the same time, the entire dew point control process is isolated from the air to ensure the safety of the high-pressure hydrogen test.

Description

Technical Field

[0001] The embodiments of the present application belong to the technical field of material testing, and particularly relate to a device and method for controlling the dew point of a high-pressure hydrogen test. Background Technique

[0002] In the process of promoting the development of the hydrogen energy industry, there are also certain problems in the process of hydrogen energy utilization. For example, there are safety risks in the materials related to the production, storage, transportation, and application of hydrogen. Hydrogen can cause hydrogen embrittlement of metal materials, especially in the presence of water (including gaseous water and liquid water), the problem of material hydrogen embrittlement will be more serious. For the influence of liquid water on the hydrogen embrittlement resistance of materials, existing test technologies can better simulate and study it. However, for the influence of gaseous water on the hydrogen embrittlement sensitivity of materials, existing test technologies are difficult to simulate. Therefore, if the dew point of the high-pressure hydrogen test environment can be accurately controlled, it is of great significance for the evaluation and safe service of hydrogen production, storage, transportation, and use materials.

[0003] For example, the Chinese invention patent with the publication number CN 109189131 A, a temperature and humidity control system coupling a gas refrigerator and a diffusion absorption refrigerator, discloses a temperature and humidity control system coupling a gas refrigerator and a diffusion absorption refrigerator. The gas refrigerator and the diffusion absorption refrigerator are jointly used as a cold source, and with the help of an air supply pipe, a return air pipe, and a water tank structure, combined with a coolant and an electronic control system, the precise control of the temperature and humidity of the microenvironment in the display cabinet is realized.

[0004] For example, the Chinese invention patent with the publication number CN 113514497 A, a method for controlling the humidity of a flammable and explosive gas mixture, discloses a method for controlling the humidity of a flammable and explosive gas mixture. A specific humidity flammable and explosive mixed gas is prepared through a saturated humid air generation and storage unit, a temperature control unit, a gas distribution unit, and a combustible gas mixing cavity.

[0005] For example, the Chinese invention patent with the publication number CN 103294077 B, a precise control device for the humidity of a gas with a low water vapor content, discloses a precise control device for the humidity of a gas with a low water vapor content. Through the temperature control drying technology of resistance heating and a semiconductor refrigeration sheet, the humidity control of a gas with a low water content is realized. The disadvantages of the above methods are as follows: the system is a non-pressure-resistant device, and the environment is easy to come into contact with air, there are safety risks, so it is not suitable for a high-pressure hydrogen environment; at the same time, the system and method increase the humidity by directly atomizing liquid water, and it is difficult to ensure that the produced wet gas does not contain liquid water.

[0006] For another example, in the Chinese invention patent, a device for setting and controlling the humidity of a gas with the publication number CN 107076689 B discloses a device for setting and controlling the humidity of a gas. The control of the gas humidity is achieved through a flow generating device, a humidity setting device, a humidity sensing device, and a control device. The disadvantages of this device are as follows: it is relatively complex and requires multiple components for humidification and drying to achieve humidity control, resulting in a complex structure of the humidity control device. At the same time, this device is not suitable for high-pressure environments. Summary of the Invention

[0007] The purpose of the embodiments of the present application is to provide a device and method for controlling the dew point of a high-pressure hydrogen test, which has the characteristics of simple structure, high-pressure and high-temperature resistance through a wet gas generation kettle, a dew point adjustment kettle, a test kettle, dew point control, and a control system. At the same time, the entire dew point control process is isolated from the air to ensure the safety of the high-pressure hydrogen test, thereby solving the problems in the background technology.

[0008] In order to solve the above technical problems, the technical solutions of the device and method for controlling the dew point of a high-pressure hydrogen test provided by the embodiments of the present application are specifically as follows:

[0009] The embodiments of the present application disclose a device for controlling the dew point of a high-pressure hydrogen test, including a gas source, a wet gas generation kettle, a dew point adjustment kettle, a test kettle, and a controller. The output end of the gas source is connected to the input end of the wet gas generation kettle. The output end of the wet gas generation kettle is connected to the dew point adjustment kettle. The dew point adjustment kettle is connected to the test kettle. The test kettle and the dew point adjustment kettle are connected to the controller.

[0010] In a preferred embodiment of any of the above solutions, a gas cylinder valve is provided on the gas source. The gas cylinder valve is connected to an inlet pipe, and a pressure reducing valve is provided on the inlet pipe.

[0011] In a preferred embodiment of any of the above solutions, the wet gas generation kettle includes a first inlet pipe, a third fastener, a first kettle cover, a wet gas generation kettle heating furnace, and a wet gas generation kettle body. The first kettle cover is connected to the wet gas generation kettle body through the third fastener. The lower part of the wet gas generation kettle body is connected to the wet gas generation kettle heating furnace. Liquid water is provided in the wet gas generation kettle body. One end of the first inlet pipe penetrates the first kettle cover and is inserted into the wet gas generation kettle body, and the other end is connected to one end of the inlet pipe. A first inlet valve is provided on the first inlet pipe.

[0012] In a preferred embodiment of any of the above solutions, the moisture generation kettle further includes a third seal, an observation part, a first thermocouple, a second thermocouple, a first sensor, and a first connection wire. The third seal is arranged on the contact surface between the kettle body of the moisture generation kettle and the first kettle cover. An observation part is arranged on the first kettle cover. The first thermocouple is used to detect the temperature of the liquid water, and transmits the detected temperature to the controller through the thirteenth connection wire, the seventh connection wire, and the sixth connection wire. The second thermocouple penetrates through the first kettle cover and is used to detect the temperature inside the kettle body of the moisture generation kettle, and transmits the temperature information to the controller through the fourteenth connection wire. The first sensor penetrates through the first kettle cover and extends into the kettle body of the moisture generation kettle, and the first sensor is electrically connected to the controller through the first connection wire.

[0013] In a preferred embodiment of any of the above solutions, the moisture generation kettle further includes a first bursting valve, a first pressure transmitter, a first air outlet pipe, and a first air outlet valve. One end of the first air outlet pipe penetrates through the first kettle cover and extends into the kettle body of the moisture generation kettle. The first air outlet valve is arranged on the first air outlet pipe and is located above the first kettle cover. The first bursting valve is connected to the first pressure transmitter. The first pressure transmitter is electrically connected to the controller through the eighth connection wire, and the first bursting valve is arranged on the first kettle cover.

[0014] In a preferred embodiment of any of the above solutions, the dew point adjustment kettle includes a second air inlet valve, a second air inlet pipe, a first fastener, a second kettle cover, a second sensor, a second bursting valve, a second pressure transmitter, a third sensor, a third thermocouple, a second connection wire, a third connection wire, a fourth connection wire, a fifth connection wire, and a dew point adjustment kettle body. The second kettle cover is connected to the dew point adjustment kettle body through the first fastener. The second sensor, the third sensor, and the third thermocouple all penetrate through the second kettle cover and extend into the dew point adjustment kettle body, and transmit the detected information to the controller through the fourth connection wire, the second connection wire, and the third connection wire respectively. The second bursting valve is connected to the second pressure transmitter, and the second bursting valve is connected to the second kettle cover. The second pressure transmitter is electrically connected to the controller through the fifth connection wire. The second air inlet pipe is communicated with the first air outlet pipe, and a second air inlet valve is arranged on the second air inlet pipe.

[0015] In a preferred embodiment of any of the above solutions, the dew point adjustment kettle further includes a first seal, a first heating jacket, and a second air outlet pipe. The first seal is disposed between the second kettle cover and the kettle body of the dew point adjustment kettle; the first heating jacket is disposed outside the kettle body of the dew point adjustment kettle; one end of the second air outlet pipe penetrates the second kettle cover and extends into the kettle body of the dew point adjustment kettle, and the other end of the second air outlet pipe is communicated with the test kettle, and a second air outlet valve is disposed on the second air outlet pipe.

[0016] In a preferred embodiment of any of the above solutions, the test kettle includes a third air inlet pipe, a second fastener, a third kettle cover, a fourth sensor, a third bursting valve, a third pressure transmitter, a fourth thermocouple, a third air outlet pipe, a third air outlet valve, and a test kettle body. The third kettle cover is connected to the test kettle body through the second fastener, and a second seal is disposed between the third kettle cover and the test kettle body. The fourth sensor and the fourth thermocouple penetrate the third kettle cover and extend into the test kettle body, and the fourth sensor is electrically connected to the controller through a ninth connecting wire, and the fourth thermocouple is electrically connected to the controller through an eleventh connecting wire and a tenth connecting wire; the third bursting valve is connected to the third pressure transmitter, and the third pressure transmitter is electrically connected to the tenth connecting wire. One end of the third air inlet pipe penetrates the third kettle cover and extends into the test kettle body, the other end of the third air inlet pipe is communicated with the second air outlet pipe, and a third air inlet valve is disposed on the third air inlet pipe; a third air outlet valve is disposed on the third air outlet pipe, and one end of the third air outlet pipe penetrates the third kettle cover and extends into the test kettle body; a second heating jacket is disposed outside the third kettle cover, and the second heating jacket is electrically connected to the sixth connecting wire through a twelfth connecting wire; the third air inlet pipe is communicated with the air inlet pipe through a conduit, and one end of the conduit is located between the pressure reducing valve and the first air inlet valve, the other end of the conduit is located between the second air outlet valve and the third air inlet valve, a fourth air inlet valve is disposed on the conduit, and the conduit is communicated with the first air outlet pipe and the second air inlet pipe through a branch pipe.

[0017] In a preferred embodiment of any of the above solutions, the controller is electrically connected to a hydrogen gas alarm and an explosion-proof exhaust fan through a fifteenth connecting wire and a sixteenth connecting wire respectively.

[0018] Compared with the prior art, the high-pressure hydrogen test dew point control device of the embodiment of the present application has the characteristics of simple structure, high pressure and high temperature resistance through a moisture generation kettle, a dew point adjustment kettle, a test kettle, dew point control and a control system. At the same time, the entire dew point control process is isolated from the air to ensure the safety of high-pressure hydrogen tests.

[0019] In a second aspect, a control method for the dew point of the high-pressure hydrogen test described above, the method includes the following steps:

[0020] Pressurize the moisture generation kettle, dew point adjustment kettle and test kettle;

[0021] Pretreat the gas environment in the moisture generation kettle, dew point adjustment kettle and test kettle after pressure testing;

[0022] Set the test temperature, test pressure and test dew point respectively through the controller;

[0023] Adjust the pressure of the moisture generation kettle through the controller;

[0024] After adjusting the pressure of the moisture generation kettle, pre-adjust the gas dew point of the dew point adjustment kettle;

[0025] Transfer the gas with adjusted dew point and pressure in the dew point adjustment kettle to the test kettle.

[0026] Compared with the prior art, the control method for the test dew point of high-pressure hydrogen in the embodiment of the present application can effectively avoid liquid water from entering the test kettle and achieve high-precision control of the high-pressure hydrogen dew point by adjusting the moisture generation kettle, dew point adjustment kettle and test kettle, increasing the hydrogen humidity by heating, reducing the hydrogen humidity by using dry gas, and combining with dew point pre-adjustment. Description of the Drawings

[0027] The drawings described herein are used to provide a further understanding of the present application and constitute a component of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation to the present application. Some specific embodiments of the present application will be described in detail later with reference to the drawings in an exemplary rather than restrictive manner. The same reference numerals in the drawings denote the same or similar components or component parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0028] Figure 1 It is a schematic diagram of the control device for the test dew point of high-pressure hydrogen in the embodiment of the present application.

[0029] Figure 2 It is a schematic diagram of the control method for the test dew point of high-pressure hydrogen in the embodiment of the present application.

[0030] Reference Numerals in the Drawings:

[0031] 1 - Hydrogen cylinder, 2 - Cylinder valve, 3 - Pressure reducing valve, 4 - Inlet pipe, 5 - Fourth inlet valve, 6 - First inlet valve, 7 - First inlet pipe, 8 - Third fastener, 9 - First kettle cover, 10 - Third seal, 11 - Observation part, 12 - First thermocouple, 13 - Humidity generation kettle heating furnace, 14 - Liquid water, 15 - Second thermocouple, 16 - First bursting valve, 17 - First pressure transmitter, 18 - First sensor, 19 - First connecting wire, 20 - First outlet pipe, 21 - First outlet valve, 22 - Second inlet valve, 23 - Second inlet pipe, 24 - First fastener, 25 - Second kettle cover, 26 - First seal, 27 - First heating jacket, 28 - Second sensor, 29 - Second bursting valve, 30 - Second pressure transmitter, 31 - Third sensor, 32 - Third thermocouple, 33 - Second outlet pipe, 34 - Second outlet valve, 35 - Second connecting wire, 36 - Third connecting wire, 37 - Fourth connecting wire, 38 - Fifth connecting wire, 39 - Sixth connecting wire, 40 - Seventh connecting wire, 41 - Controller, 42 - Eighth connecting wire, 43 - Third inlet valve, 44 - Third inlet pipe, 45 - Second fastener, 46 - Third kettle cover, 47 - Second seal, 48 - Second heating jacket, 49 - Fourth sensor, 50 - Third bursting valve, 51 - Third pressure transmitter, 52 - Fourth thermocouple, 53 - Third outlet pipe, 54 - Third outlet valve, 55 - Test kettle, 56 - Humidity generation kettle body, 57 - Dew point adjustment kettle body, 58 - Test kettle body, 59 - Ninth connecting wire, 60 - Tenth connecting wire, 61 - Eleventh connecting wire, 62 - Twelfth connecting wire, 63 - Thirteenth connecting wire, 64 - Fourteenth connecting wire, 65 - Hydrogen gas alarm, 66 - Fifteenth connecting wire, 67 - Explosion-proof exhaust fan, 68 - Sixteenth connecting wire. Detailed implementation mode

[0032] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0034] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0036] The following embodiments of the present application take the control device and method for the dew point of high-pressure hydrogen test as an example to illustrate the solution of the present application in detail, but these embodiments do not limit the protection scope of the present application.

[0037] Embodiment

[0038] In the first aspect, as Figure 1 shown, the embodiment of the present application provides a control device for the dew point of high-pressure hydrogen test, including a gas source 1, a moisture generation kettle, a dew point adjustment kettle, a test kettle 55 and a controller 41. The output end of the gas source 1 is communicated with the input end of the moisture generation kettle, the output end of the moisture generation kettle is connected to the dew point adjustment kettle, the dew point adjustment kettle is communicated with the test kettle 55, and the test kettle 55 and the dew point adjustment kettle are connected to the controller 41.

[0039] In the control device for the dew point of high-pressure hydrogen test described in the embodiment of the present invention, through the moisture generation kettle, the dew point adjustment kettle, the test kettle 55 and the controller 41, it has the characteristics of simple structure, high pressure and high temperature resistance. At the same time, the whole dew point control process is isolated from the air to ensure the safety of high-pressure hydrogen test. In the embodiment of the present invention, preferably, the gas source refers to a high-pressure gas containing hydrogen, the pressure of which is higher than 0.1 MPa. The gas source 1 is a hydrogen cylinder storing hydrogen, and the hydrogen cylinder is communicated with the gas source 1 and the test kettle 55. In the embodiment of the present invention, the moisture generation kettle refers to a high-pressure kettle for generating moisture.

[0040] As Figure 1 shown, a cylinder valve 2 is provided on the gas source 1, the cylinder valve 2 is communicated with an inlet pipe 4, and a pressure reducing valve 3 is provided on the inlet pipe 4.

[0041] In the control device for the dew point of high-pressure hydrogen in the embodiments of the present invention, the cylinder valve 2 is used to open or close the intake pipe 4 and regulate the flow of hydrogen. To reduce the hydrogen at the inlet pressure to the pressure required at the inlet of the moisture generation kettle, a pressure reducing valve 3 can be provided on the intake pipe 4, thus facilitating the regulation of pressure.

[0042] As Figure 1 shown, the moisture generation kettle includes a first intake pipe 7, a third fastener 8, a first kettle cover 9, a moisture generation kettle heating furnace 13, and a moisture generation kettle body 56. The first kettle cover 9 is connected to the moisture generation kettle body 56 through the third fastener 8. The lower part of the moisture generation kettle body 56 is connected to the moisture generation kettle heating furnace 13. Liquid water 14 is provided inside the moisture generation kettle body 56. One end of the first intake pipe 7 penetrates through the first kettle cover 9 and is inserted into the moisture generation kettle body 56, and the other end is communicated with one end of the intake pipe 4. A first intake valve 6 is provided on the first intake pipe 7.

[0043] In the control device for the dew point of high-pressure hydrogen in the embodiments of the present invention, to facilitate the disassembly and assembly of the moisture generation kettle body 56, the moisture generation kettle body 56 and the first kettle cover 9 can be connected through the third fastener 8. To facilitate the heating of the inside of the moisture generation kettle body 56, a moisture generation kettle heating furnace 13 is provided at the bottom of the moisture generation kettle body 56, which can continuously heat the moisture generation kettle body 56. Among them, to generate moisture, the liquid water 14 is placed in the moisture generation kettle body 56, and the moisture generation kettle heating furnace 13 continuously heats the moisture generation kettle body 56, thereby generating steam from the liquid water 14. At this time, to facilitate the introduction of hydrogen, one end of the first intake pipe 7 penetrates through the first kettle cover 9 and is inserted into the moisture generation kettle body 56, and the other end of the first intake pipe 7 is communicated with the output end of the intake pipe 4. By providing a first intake valve 6 on the first intake pipe 7, the input amount of hydrogen can be conveniently adjusted for easy use. In the embodiments of the present invention, preferably, the third fastener, the second fastener, and the first fastener are all fastening bolts.

[0044] As Figure 1As shown, the moisture generation kettle further includes a third seal 10, an observation part 11, a first thermocouple 12, a second thermocouple 15, a first sensor 18, and a first connection wire 19. The third seal 10 is disposed on the contact surface between the kettle body 56 of the moisture generation kettle and the first kettle cover 9. An observation part 11 is provided on the first kettle cover 9. The first thermocouple 12 is used to detect the temperature of the liquid water 14, and transmits the detected temperature to the controller 41 through the thirteenth connection wire 63, the seventh connection wire 40, and the sixth connection wire 39. The second thermocouple 15 penetrates through the first kettle cover 9 and is used to detect the temperature inside the kettle body 56 of the moisture generation kettle, and transmits the temperature information to the controller 41 through the fourteenth connection wire 64. The first sensor 18 penetrates through the first kettle cover 9 and extends into the kettle body 56 of the moisture generation kettle, and the first sensor 18 is electrically connected to the controller 41 through the first connection wire 19.

[0045] In the control device for the high-pressure hydrogen test dew point according to the embodiment of the present invention, in order to make the seal between the kettle body 56 of the moisture generation kettle and the first kettle cover 9 more tight, a third seal 10 can be provided between the kettle body 56 of the moisture generation kettle and the first kettle cover 9. In order to conveniently and real-time obtain the temperature of the liquid water 14 and facilitate the heating of the kettle body 56 of the moisture generation kettle, the first thermocouple 12 is connected to the liquid water 14 inside the kettle body 56 of the moisture generation kettle, so as to transmit the collected temperature to the controller 41 through the thirteenth connection wire 63, the seventh connection wire 40, and the sixth connection wire 39, so as to enable the controller 41 to adjust the heating amount of the heating furnace 13 of the moisture generation kettle according to the actual temperature of the liquid water 14, thereby realizing precise temperature control. In order to conveniently view the condition inside the kettle body 56 of the moisture generation kettle during the heating process, an observation part 11 for observing the condition inside the kettle body 56 of the moisture generation kettle can be provided on the first kettle cover 9. In order to conveniently master the humidity condition inside the kettle body 56 of the moisture generation kettle, one end of the first sensor 18 can penetrate through the first kettle cover 9 and extend below the first kettle cover 9, so as to real-time obtain the humidity inside the kettle body 56 of the moisture generation kettle, and transmit the information to the controller 41 through the first connection wire 19, and then the controller 41 adjusts the heating of the heating furnace 13 of the moisture generation kettle according to the humidity data inside the kettle body 56 of the moisture generation kettle, thereby realizing convenient and precise regulation.

[0046] As Figure 1As shown, the moisture generation kettle further includes a first bursting valve 16, a first pressure transmitter 17, a first gas outlet pipe 20, and a first gas outlet valve 21. One end of the first gas outlet pipe 20 penetrates through the first kettle cover 9 and extends into the kettle body 56 of the moisture generation kettle. The first gas outlet valve 21 is arranged on the first gas outlet pipe 20 and is located above the first kettle cover 9. The first bursting valve 16 is connected to the first pressure transmitter 17. The first pressure transmitter 17 is electrically connected to the controller 41 through an eighth connecting wire 42, and the first bursting valve 16 is arranged on the first kettle cover 9.

[0047] In the control device for the dew point of high-pressure hydrogen gas test in the embodiment of the present invention, in order to prevent the pressure in the kettle body 56 of the moisture generation kettle from being too high, the first bursting valve 16 can be communicated with the kettle body 56 of the moisture generation kettle. When the pressure value in the kettle body 56 of the moisture generation kettle is relatively large, the first bursting valve 16 will open to exhaust gas outward, thereby playing a role in protecting the kettle body 56 of the moisture generation kettle. By setting the first pressure transmitter 17, the gas pressure parameter sensed by the first bursting valve 16 can be converted into a standard electrical signal to be supplied to the controller 41, facilitating the controller 41 to perform regulation.

[0048] As Figure 1 shown, the dew point adjustment kettle includes a second intake valve 22, a second intake pipe 23, a first fastener 24, a second kettle cover 25, a second sensor 28, a second bursting valve 29, a second pressure transmitter 30, a third sensor 31, a third thermocouple 32, a second connecting wire 35, a third connecting wire 36, a fourth connecting wire 37, a fifth connecting wire 38, and a dew point adjustment kettle body 57. The second kettle cover 25 is connected to the dew point adjustment kettle body 57 through the first fastener 24. The second sensor 28, the third sensor 31, and the third thermocouple 32 all penetrate through the second kettle cover 25 and extend into the dew point adjustment kettle body 57, and transmit the detection information to the controller 41 through the fourth connecting wire 37, the second connecting wire 35, and the third connecting wire 36 respectively. The second bursting valve 29 is connected to the second pressure transmitter 30, and the second bursting valve 29 is connected to the second kettle cover 25. The second pressure transmitter 30 is electrically connected to the controller 41 through the fifth connecting wire 38. The second intake pipe 23 is communicated with the first gas outlet pipe 20, and a second intake valve 22 is arranged on the second intake pipe 23.

[0049] In the control device for the dew point of high-pressure hydrogen gas in the embodiments of the present invention, the second kettle cover 25 is connected to the dew point adjustment kettle body 57 through the first fastener 24, which can facilitate disassembly and assembly. Both the second sensor 28 and the third sensor 31 are dew point sensors, which can measure the dew point temperature. By setting the third thermocouple 32, the temperature inside the dew point adjustment kettle body 57 can be directly measured, and the temperature signal is converted into a thermoelectromotive force signal and transmitted to the controller 41. By setting the second bursting valve 29, when the pressure value inside the dew point adjustment kettle body 57 is relatively large, the second bursting valve 29 will open to exhaust gas outward, thus playing a role in protecting the dew point adjustment kettle body 57. By setting the second pressure transmitter 30, the gas pressure parameter sensed by the second bursting valve 29 can be converted into a standard electrical signal to supply the controller 41. The controller 41 can control the hydrogen gas alarm 65 to sound, playing a reminder role and facilitating the controller 41 to carry out regulation. By setting the second intake valve 22 on the second intake pipe 23, the amount of hydrogen gas entering can be regulated, which is convenient for regulation.

[0050] As Figure 1 shown, the dew point adjustment kettle further includes a first seal 26, a first heating jacket 27, and a second outlet pipe 33. The first seal 26 is arranged between the second kettle cover 25 and the dew point adjustment kettle body 57; the first heating jacket 27 is arranged outside the dew point adjustment kettle body 57; one end of the second outlet pipe 33 penetrates through the second kettle cover 25 and extends into the dew point adjustment kettle body 57, and the other end of the second outlet pipe 33 is communicated with the test kettle 55, and a second outlet valve 34 is arranged on the second outlet pipe 33.

[0051] In the control device for the dew point of high-pressure hydrogen gas in the embodiments of the present invention, by setting the first seal 26, the dew point adjustment kettle body 57 can be sealed. By setting the first heating jacket 27, the heating of the dew point adjustment kettle body 57 by the first heating jacket 27 can be conveniently regulated, which is convenient for operation. Then, the gas is discharged to the test kettle 55 through the second outlet pipe 33. In the embodiments of the present invention, preferably, the first seal, the second seal, and the third seal are all sealing rings.

[0052] As Figure 1As shown, the test autoclave 55 includes a third intake pipe 44, a second fastener 45, a third autoclave cover 46, a fourth sensor 49, a third bursting disc 50, a third pressure transmitter 51, a fourth thermocouple 52, a third exhaust pipe 53, a third exhaust valve 54, and an autoclave body 58. The third autoclave cover 46 is connected to the autoclave body 58 through the second fastener 45, which facilitates disassembly and assembly. And a second seal 47 is provided between the third autoclave cover 46 and the autoclave body 58, which can play a sealing role. The fourth sensor 49 and the fourth thermocouple 52 penetrate the third autoclave cover 46 and extend into the autoclave body 58. And the fourth sensor 49 is electrically connected to the controller 41 through a ninth connecting wire 59. In the embodiment of the present invention, the fourth sensor 49 is a dew point sensor, which can measure the dew point temperature. The fourth thermocouple 52 is electrically connected to the controller 41 through an eleventh connecting wire 61 and a tenth connecting wire 60. By setting the fourth thermocouple 52, the temperature inside the autoclave body 58 can be directly measured, and the temperature signal is converted into a thermoelectromotive force signal and transmitted to the controller 41; the third bursting disc 50 is connected to the third pressure transmitter 51, and the third pressure transmitter 51 is electrically connected to the tenth connecting wire 60. One end of the third intake pipe 44 penetrates the third autoclave cover 46 and extends into the autoclave body 58. The other end of the third intake pipe 44 is communicated with the second exhaust pipe 33, and a third intake valve 43 is provided on the third intake pipe 44; a third exhaust valve 54 is provided on the third exhaust pipe 53, and one end of the third exhaust pipe 53 penetrates the third autoclave cover 46 and extends into the autoclave body 58; a second heating jacket 48 is provided outside the third autoclave cover 46, and the second heating jacket 48 is electrically connected to the sixth connecting wire 39 through a twelfth connecting wire 62; the third intake pipe 44 is communicated with the intake pipe 4 through a conduit. One end of the conduit is located between the pressure reducing valve 3 and the first intake valve 6, and the other end of the conduit is located between the second exhaust valve 34 and the third intake valve 43. A fourth intake valve 5 is provided on the conduit. The conduit is communicated with the first exhaust pipe 20 and the second intake pipe 23 through a branch pipe. The controller 41 is electrically connected to a hydrogen gas detector 65 and an explosion-proof exhaust fan 67 through a fifteenth connecting wire 66 and a sixteenth connecting wire 68 respectively. By setting the explosion-proof exhaust fan 67, ventilation can be achieved.

[0053] Second aspect, as Figure 1 and Figure 2 shown, a method for controlling the test dew point of high-pressure hydrogen, the method includes the following steps:

[0054] Step 1: Pressurize the moisture generation kettle, dew point adjustment kettle and test kettle 55. Open the first intake valve 6, close the first outlet valve 21, and pressurize the moisture generation kettle. The pressurizing gas is 99.999% nitrogen, and the pressurizing pressure is not lower than the pressure required for the moisture generation kettle to produce moisture. Close the first intake valve 6, open the fourth intake valve 5 and the second intake valve 22, close the second outlet valve 34, and pressurize the dew point adjustment kettle. The pressurizing gas is 99.999% nitrogen, and the pressurizing pressure is not lower than the pressure required for the dew point adjustment kettle to adjust the dew point; close the first intake valve 6 and the second intake valve 22, open the fourth intake valve 5 and the third intake valve 43, close the third outlet valve 54, and pressurize the test reaction kettle. The pressurizing gas is 99.999% nitrogen, and the pressurizing pressure is not lower than the pressure required for the test in the test kettle;

[0055] Step 2: Pretreat the gas environment in the moisture generation kettle, dew point adjustment kettle and test kettle 55 after pressurization. Open the first intake valve 6, the first outlet valve 21, the second intake valve 22, the second outlet valve 34, the third intake valve 43, the third outlet valve 54, close the fourth intake valve 5, open the gas cylinder valve 2 and the pressure reducing valve 3, and replace the gas in the kettle with the source gas by introducing the source gas. Then close the first intake valve 6, the first outlet valve 21, the second intake valve 22, the second outlet valve 34, the third intake valve 43, the third outlet valve 54, the gas cylinder valve 2 and the pressure reducing valve 3;

[0056] Step 3: Set the test temperature, test pressure and test dew point respectively through the controller 41, start the heating of the moisture generation kettle 13, the first heating jacket 27 and the second heating jacket 48, heat the temperature in the kettle to the required test temperature, and wait for the temperature to stabilize;

[0057] Step 4: Adjust the pressure of the moisture generation kettle through the controller 41. Open the first intake valve 6, close the first outlet valve 21, open the gas cylinder valve 2 and the pressure reducing valve 3, and increase the pressure of the moisture generation kettle higher than the required test pressure (if the test pressure is higher than the source pressure, it can be pressurized by a booster pump); close the first intake valve 6, the gas cylinder valve 2 and the pressure reducing valve 3, increase the hydrogen humidity by heating up, reduce the hydrogen humidity by using dry gas, and at the same time combine with dew point pre-adjustment, which can effectively prevent liquid water from entering the test kettle and realize high-precision control of the dew point of high-pressure hydrogen, which is of great significance for the evaluation of materials for hydrogen production, storage and transportation and safe service;

[0058] Step 5: After adjusting the pressure of the moisture generation kettle, pre-adjust the gas dew point of the dew point adjustment kettle. Open the first outlet valve 21 and the second intake valve 22, close the second outlet valve 34, slowly transfer the moisture to the dew point adjustment kettle through the pressure difference, and adjust the dew point and pressure of the dew point adjustment kettle to slightly higher than the required dew point and pressure through the source gas, and then close the first outlet valve 21 and the second intake valve 22;

[0059] Step 6: Transfer the gas with the dew point and pressure adjusted in the dew point adjustment kettle to the test kettle 55. Open the second gas outlet valve 34 and the third gas inlet valve 43, and close the kettle gas outlet valve 54. Transfer the gas with the dew point pre-adjusted from the dew point adjustment kettle to the test kettle through the pressure difference between the dew point adjustment kettle and the test kettle. If the dew point in the test kettle is higher than the dew point required for the test, it can be further adjusted to the dew point and pressure required for the test by introducing the source gas.

[0060] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features of the components; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A control device for the dew point of a high-pressure hydrogen test, characterized in that, It includes a gas source (1), a moisture generation kettle, a dew point adjustment kettle, a test kettle (55), and a controller (41). The output end of the gas source (1) is communicated with the input end of the moisture generation kettle. The output end of the moisture generation kettle is connected to the dew point adjustment kettle. The dew point adjustment kettle is communicated with the test kettle (55). The test kettle (55) and the dew point adjustment kettle are connected to the controller (41). The moisture generation kettle includes a first intake pipe (7), a third fastener (8), a first kettle cover (9), a moisture generation kettle heating furnace (13), and a moisture generation kettle body (56). The first kettle cover (9) is connected to the moisture generation kettle body (56) through the third fastener (8). The lower part of the moisture generation kettle body (56) is connected to the moisture generation kettle heating furnace (13). Liquid water (14) is arranged in the moisture generation kettle body (56). One end of the first intake pipe (7) penetrates through the first kettle cover (9) and is inserted into the moisture generation kettle body (56), and the other end is communicated with one end of the intake pipe (4). And a first intake valve (6) is arranged on the first intake pipe (7). The moisture generation kettle further includes a first bursting valve (16), a first pressure transmitter (17), a first outlet pipe (20), and a first outlet valve (z1). One end of the first outlet pipe (20) penetrates through the first kettle cover (9) and extends into the moisture generation kettle body (56). The first outlet valve (21) is arranged on the first outlet pipe (20) and is located above the first kettle cover (9). The first bursting valve (16) is connected to the first pressure transmitter (17). The first pressure transmitter (17) is electrically connected to the controller (41) through an eighth connecting wire (42). And the first bursting valve (16) is arranged on the first kettle cover (9). The dew point adjustment kettle includes a second intake valve (22), a second intake pipe (23), a first fastener (24), a second kettle cover (25), a second sensor (28), a second bursting valve (29), a second pressure transmitter (30), a third sensor (31), a third thermocouple (32), a second connecting wire (35), a third connecting wire (36), a fourth connecting wire (37), a fifth connecting wire (38), and a dew point adjustment kettle body (57). The second kettle cover (25) is connected to the dew point adjustment kettle body (57) through the first fastener (24). The second sensor (28), the third sensor (31), and the third thermocouple (32) all penetrate through the second kettle cover (25) and extend into the dew point adjustment kettle body (57), and transmit the detection information to the controller (41) through the fourth connecting wire (37), the second connecting wire (35), and the third connecting wire (36) respectively. The second bursting valve (29) is connected to the second pressure transmitter (30), and the second bursting valve (29) is connected to the second kettle cover (25). The second pressure transmitter (30) is electrically connected to the controller (41) through the fifth connecting wire (38).The second intake pipe (23) is communicated with the first outlet pipe (20), and a second intake valve (22) is arranged on the second intake pipe (23); the gas source refers to a high-pressure gas containing hydrogen, and its pressure is higher than 0.1 MPa.

2. The control device for the dew point of high-pressure hydrogen test according to claim 1, characterized in that, A gas cylinder valve (2) is provided on the gas source (1). The gas cylinder valve (2) is communicated with an inlet pipe (4), and a pressure reducing valve (3) is provided on the inlet pipe (4).

3. The dew point control device for high-pressure hydrogen test according to claim 2, wherein The wet gas generation kettle further includes a third seal (10), an observation part (11), a first thermocouple (12), a second thermocouple (15), a first sensor (18) and a first connecting wire (19). The third seal (10) is arranged on the contact surface between the kettle body (56) of the wet gas generation kettle and the first kettle cover (9). The first kettle cover (9) is provided with the observation part (11). The first thermocouple (12) is used to detect the temperature of the liquid water (14), and transmit the detected temperature to the controller (41) through a thirteenth connecting wire (63), a seventh connecting wire (40) and a sixth connecting wire (39). The second thermocouple (15) penetrates through the first kettle cover (9) and is used to detect the temperature inside the kettle body (56) of the wet gas generation kettle, and transmit the temperature information to the controller (41) through a fourteenth connecting wire (64). The first sensor (18) penetrates through the first kettle cover (9) and extends into the kettle body (56) of the wet gas generation kettle, and the first sensor (18) is electrically connected to the controller (41) through the first connecting wire (19).

4. The dew point control device for high-pressure hydrogen test according to claim 3, characterized in that, The dew point adjustment kettle further includes a first seal (26), a first heating jacket (27) and a second outlet pipe (33). The first seal (26) is arranged between the second kettle cover (25) and the kettle body (57) of the dew point adjustment kettle. The first heating jacket (27) is arranged outside the kettle body (57) of the dew point adjustment kettle. One end of the second outlet pipe (33) penetrates through the second kettle cover (25) and extends into the kettle body (57) of the dew point adjustment kettle, and the other end of the second outlet pipe (33) is communicated with the test kettle (55), and a second outlet valve (34) is provided on the second outlet pipe (33).

5. The dew point control device for high-pressure hydrogen test according to claim 4, characterized in that The test autoclave (55) includes a third inlet pipe (44), a second fastener (45), a third autoclave cover (46), a fourth sensor (49), a third rupture disc (50), a third pressure transmitter (51), a fourth thermocouple (52), a third outlet pipe (53), a third outlet valve (54), and an autoclave body (58). The third autoclave cover (46) is connected to the autoclave body (58) through the second fastener (45), and a second seal (47) is provided between the third autoclave cover (46) and the autoclave body (58). The fourth sensor (49) and the fourth thermocouple (52) penetrate the third autoclave cover (46) and extend into the autoclave body (58), and the fourth sensor (49) is electrically connected to the controller (41) through a ninth connecting wire (59). The fourth thermocouple (52) is electrically connected to the controller (41) through an eleventh connecting wire (61) and a tenth connecting wire (60). The third rupture disc (50) is connected to the third pressure transmitter (51), and the third pressure transmitter (51) is electrically connected to the tenth connecting wire (60). One end of the third inlet pipe (44) penetrates the third autoclave cover (46) and extends into the autoclave body (58). The other end of the third inlet pipe (44) is communicated with the second outlet pipe (33), and a third inlet valve (43) is provided on the third inlet pipe (44). A third outlet valve (54) is provided on the third outlet pipe (53), and one end of the third outlet pipe (53) penetrates the third autoclave cover (46) and extends into the autoclave body (58). A second heating jacket (48) is provided outside the third autoclave cover (46), and the second heating jacket (48) is electrically connected to the sixth connecting wire (39) through a twelfth connecting wire (62). The third inlet pipe (44) is communicated with the inlet pipe (4) through a conduit. One end of the conduit is located between the pressure reducing valve (3) and the first inlet valve (6), and the other end of the conduit is located between the second outlet valve (34) and the third inlet valve (43). A fourth inlet valve (5) is provided on the conduit, and the conduit is communicated with the first outlet pipe (20) and the second inlet pipe (23) through a branch pipe.

6. The control device for the dew point of high-pressure hydrogen test according to claim 5, characterized in that, The controller (41) is electrically connected to a hydrogen gas alarm (65) and an explosion-proof exhaust fan (67) through a fifteenth connecting wire (66) and a sixteenth connecting wire (68) respectively.

7. A control method for a control device of the dew point of high-pressure hydrogen gas test as described in any one of claims 1 to 6, characterized in that, The method includes the following steps: Pressurize the moisture generation autoclave, dew point adjustment autoclave, and test autoclave (55). Pretreat the gas environment in the moisture generation autoclave, dew point adjustment autoclave, and test autoclave (55) after pressure testing. Set the test temperature, test pressure, and test dew point through the controller (41) respectively. Adjust the pressure of the moisture generation autoclave through the controller (41). After adjusting the pressure of the moisture generation autoclave, pre-adjust the gas dew point of the dew point adjustment autoclave. Transfer the gas with adjusted dew point and pressure in the dew point adjustment autoclave to the test autoclave (55).

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