Ultralow-temperature hydrogen purifier

Abstract

The utility model relates to the technical field of hydrogen purification, and discloses an ultralow-temperature hydrogen purifier which comprises a tank body with an opening in the top, an inner tank used for being filled with liquid nitrogen is fixedly installed in the tank body, a heat preservation cavity is formed between the tank body and the inner tank, an upper end cover located at the opening is detachably connected to the tank body, and a lower end cover located at the opening is detachably connected to the upper end cover. A lower end cover located in the inner tank is fixedly installed on the surface of one side of the upper end cover, a partition plate is fixedly installed between the upper end cover and the lower end cover, and a heat preservation cavity is formed between the tank body and the inner tank, so that heat transfer is effectively reduced, the utilization efficiency of liquid nitrogen is improved, meanwhile, the upper end cover and the tank body are detachably connected, and the heat preservation effect is improved. The purification device and the gas purification material are easy to replace and maintain, the maintenance cost is reduced, the closing assembly is further arranged, liquid nitrogen can be manually controlled to enter and exit, and therefore the gas purification material is convenient to replace, and the flexibility is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydrogen purification technical field, concretely is a kind of hydrogen purifier of ultralow temperature. BACKGROUND

[0002] With the development of semiconductor industry, fine chemical industry and photoelectric industry, these industries require extremely high purity of hydrogen, usually more than 99.999% high-purity hydrogen, so it is necessary to further purify hydrogen obtained by various industrial hydrogen production methods, including palladium membrane diffusion method, organic hollow fiber membrane diffusion method, low-temperature separation method, etc. With the continuous progress of science and technology and the acceleration of industrialization process, hydrogen purification technology has been continuously developing.

[0003] In the hydrogen purification process, common impurities (carbon dioxide, carbon monoxide and nitrogen, etc.) can meet the purification requirements by normal temperature adsorption method, while argon needs to be adsorbed and removed under ultralow temperature conditions. In order to meet the temperature conditions of ultralow temperature, liquid nitrogen cooling is usually used, and because the temperature of liquid nitrogen is too low, it is not convenient to replace the purification reaction materials, so an ultralow-temperature hydrogen purifier is proposed to solve the above problems. SUMMARY

[0004] The utility model aims at at least solving one of the technical problems existing in prior art, and therefore proposes an ultralow-temperature hydrogen purifier, which comprises a tank body with an open top, an inner tank for filling liquid nitrogen is fixedly installed in the tank body, and a heat preservation cavity is arranged between the tank body and the inner tank, an upper end cover is detachably connected to the opening of the tank body, a lower end cover is fixedly installed in the inner tank on one side surface of the upper end cover, and a partition plate is fixedly installed between the upper end cover and the lower end cover, the space between the upper end cover and the lower end cover is divided into a shunt cavity on the upper side and a concentration cavity on the lower side by the partition plate, a purification device is arranged in the inner tank between the shunt cavity and the concentration cavity, an inner container is arranged outside the purification device in the inner tank, and the inner container and the inner tank are in communication, and a closing assembly is arranged on the inner container.

[0005] Further, a gas pipe is communicated with the tank body, one end of the gas pipe is communicated with the suction end of the vacuum pump, and the other end is communicated with the heat preservation cavity, and a delivery pipe is communicated with the inner tank, one end of the delivery pipe penetrates the tank body, and the delivery pipe is used for delivering liquid nitrogen.

[0006] Further, an inner thread is arranged at the opening of the tank body, an outer thread is arranged on one side surface of the upper end cover and matched with the inner thread, and the upper end cover is polygonally arranged on the top.

[0007] Further, the purification device comprises a gas inlet pipe fixedly installed on the upper end cover and penetratingly arranged, one end of the gas inlet pipe being in communication with the shunt cavity, a plurality of shunt pipes being fixedly installed on the baffle and annularly and equidistantly arranged, one end of each of the shunt pipes penetratingly extending to the inner container through the lower end cover, a pipe body being fixedly installed on one side of the lower end cover and sleeved with the shunt pipes, and the pipe body being filled with gas purification materials, a gas hole being formed in the lower end cover and in communication with the concentration cavity and the pipe body at two ends thereof, and an air outlet pipe being arranged on the upper end cover and in communication with the concentration cavity at one end thereof.

[0008] Further, the gas inlet end of the gas inlet pipe is provided with a first filter, the lower end cover is provided with a second filter at the gas hole, the lower end cover is provided with an air outlet pipe penetratingly extending to the upper end cover through the baffle, one end of the air outlet pipe is in communication with the inner container, and the other end of the air outlet pipe is provided with a pressure relief valve.

[0009] Further, the closing assembly comprises an interaction hole for the liquid nitrogen to enter and exit, the bottom of the inner container is provided with an interaction hole in communication with the inner tank, a liquid nitrogen plug is slidably connected in the interaction hole, one end of the liquid nitrogen plug is rotatably connected with a hand screw rod in the inner container, and a threaded hole matched with the hand screw rod is formed in the upper end cover.

[0010] Further, the upper end cover is provided with a temperature monitoring device in the concentration cavity.

[0011] The purification device has the advantages that: the tank body and the inner tank are arranged, the heat transfer is effectively reduced, the utilization efficiency of the liquid nitrogen is improved, the purification device and the gas purification materials are easy to replace and maintain through the detachable connection between the upper end cover and the tank body, the maintenance cost is reduced, the closing assembly is further arranged, the liquid nitrogen is manually controlled to enter and exit, the gas purification materials are convenient to replace, and the flexibility is higher. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a whole schematic view of the utility model;

[0013] Figure 2 It is the utility model Figure 1 It is an enlarged schematic view of A in the utility model;

[0014] Figure 3 It is a connection schematic view of the upper end cover, the baffle and the lower end cover of the utility model;

[0015] Figure 4 It is a connection schematic view of the first filter, the second filter and the pipe body of the utility model.

[0016] Wherein, 1, tank body; 2, inner tank; 3, heat preservation cavity; 4, upper end cover; 5, lower end cover; 6, shunt cavity; 7, concentration cavity; 8, purification device; 81, air inlet pipe; 82, shunt pipe; 83, pipe body; 84, air hole; 85, air outlet pipe; 9, inner bag; 10, closure assembly; 101, interactive hole; 102, liquid nitrogen plug; 103, hand screw rod; 104, threaded hole; 11, air pipe; 12, delivery pipe; 13, first filter; 14, second filter; 15, exhaust pipe; 16, temperature monitoring device; 17, partition. DETAILED DESCRIPTION

[0017] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.

[0018] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0019] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0020] In the embodiments, Figures 1-4The utility model provides a kind of ultra-low temperature hydrogen purifier, including the tank body 1 of top opening setting, inner tank 2 for filling liquid nitrogen is fixedly installed in tank body 1, and heat preservation cavity 3 is arranged between tank body 1 and inner tank 2, the upper end cap 4 located at opening is detachably connected on the tank body 1, the lower end cap 5 located in inner tank 2 is fixedly installed on the side surface of upper end cap 4, and baffle 17 is fixedly installed between upper end cap 4 and lower end cap 5, the space between upper end cap 4 and lower end cap 5 is separated into the flow splitting cavity 6 located above and the concentration cavity 7 located below by baffle 17, the purifying device 8 located in inner tank 2 is arranged between flow splitting cavity 6 and concentration cavity 7, the inner container 9 located on the outside of purifying device 8 is arranged in inner tank 2, and inner container 9 and inner tank 2 are communicated with each other, the inner container 9 is arranged on the inner tank 2, and it is communicated with each other, forms a ultra-low temperature environment, so as to realize the adsorption removal of argon, hydrogen after purification enters concentration cavity 7, and is guided out and is collected by gas outlet pipe 85, a plurality of exhaust holes are formed in the surface of inner container 9.

[0021] Refer to Figures 1-4 Wherein, the gas pipe 11 is communicated with the tank body 1, and the one end of the gas pipe 11 is communicated with the suction end of vacuum pump, and the other end is communicated with the heat preservation cavity 3, the conveying pipe 12 is communicated with the inner tank 2, and the conveying pipe 12 penetrates the tank body 1 and is used for conveying liquid nitrogen;

[0022] Through the above structure, before hydrogen purification, the heat preservation cavity 3 is pumped by vacuum pump to reduce the air pressure of the region, prevent the temperature loss of liquid nitrogen in the inner tank 2, help to ensure the efficient progress of hydrogen purification process, the conveying pipe 12 can conveniently inject new liquid nitrogen into the inner tank 2 to maintain the ultra-low temperature environment around the inner container 9 and the internal purifying device 8 thereof.

[0023] Refer to Figures 1-4 Wherein, the inner thread is arranged at the opening of the tank body 1, and the outer thread matched with the inner thread is arranged on the side surface of the upper end cap 4, and the top of the upper end cap 4 is polygonal;

[0024] Through the above structure, by rotating the upper end cap 4, the polygonal (such as hexagonal, octagonal, etc.) setting of the top of the upper end cap 4 can be conveniently used to apply torque by using tools, so as to realize the close connection between the upper end cap 4 and the tank body 1, prevent the leakage of hydrogen during the purification process, and also ensure the stability and safety of the inner tank 2 and its inner container.

[0025] Refer to Figures 1-4The purification device 8 comprises a gas inlet pipe 81 fixedly installed on the upper end cover 4 and penetrating through, one end of the gas inlet pipe 81 being communicated with the shunt cavity 6, a plurality of shunt pipes 82 penetrating through the lower end cover 5 and extending to the inner container 9 are fixedly installed on the baffle 17 in a ring shape and equidistantly distributed, a pipe body 83 is sleeved outside each of the shunt pipes 82 and is fixedly installed on one side of the lower end cover 5, and the pipe body 83 is filled with gas purification materials, a gas hole 84 is formed in the lower end cover 5 and is communicated with the shunt cavity 7 and the pipe body 83, and the upper end cover 4 is provided with a gas outlet pipe 85 communicated with the shunt cavity 7;

[0026] Through the above structure, hydrogen is introduced into the shunt cavity 6 through the gas inlet pipe 81, under the action of pressure, the hydrogen is further distributed into the plurality of shunt pipes 82, then contacts with the gas purification materials in the pipe body 83, so that the gas purification is performed, at the same time, the pipe body 83 is immersed in the liquid nitrogen, so that the ultra-low temperature processing environment is formed, and after the hydrogen is purified, the hydrogen enters the shunt cavity 7 from the gas hole 84.

[0027] With reference to Figures 1-4 The gas inlet end of the gas inlet pipe 81 is provided with a first filter 13, the lower end cover 5 is provided with a second filter 14 at the gas hole 84, the lower end cover 5 is provided with an exhaust pipe 15 penetrating through the baffle 17 and extending to the upper end cover 4, one end of the exhaust pipe 15 is communicated with the inner container 9, and the other end is provided with a pressure relief valve;

[0028] Through the above structure, before the hydrogen enters the pipe body 83, the hydrogen passes through the first filter 13, which is mainly used for removing large-particle impurities such as dust and sand in the gas, so as to protect the subsequent purification process and the inside of the device from being damaged, and the second filter 14 is used for separating the pulverized substances carried after the hydrogen is purified, so as to ensure the purity of the hydrogen, and when the purification device 8 is replaced and installed, the excess air in the purifier is discharged through the pressure relief valve.

[0029] With reference to Figures 1-4 The closed assembly 10 comprises an interaction hole 101 for liquid nitrogen to enter and exit, the bottom of the inner container 9 is provided with the interaction hole 101 communicated with the inner tank 2, a liquid nitrogen plug 102 is slidably connected in the interaction hole 101, one end of the liquid nitrogen plug 102 is rotatably connected with a hand screw rod 103 located in the inner container 9, and a threaded hole 104 matched with the hand screw rod 103 is formed in the upper end cover 4;

[0030] Through the above structural arrangement, before the installation of the purification device 8, the liquid nitrogen plug 102 is in contact with the inner container 9, thereby closing the interaction hole 101, preventing the liquid nitrogen from entering the inner container 9, when it is necessary to inject liquid nitrogen into the inner container 9, the hand screw rod 103 is rotated, driving the liquid nitrogen plug 102 to slide in the interaction hole 101, changing the position of the liquid nitrogen plug 102, thereby opening the interaction hole 101 between the inner container 9 and the inner tank 2, at this time, the liquid nitrogen can flow freely into or out of the inner container 9 through the interaction hole 101, realizing the injection of liquid nitrogen, and during the replacement of the purification device, the interaction hole 101 also needs to be closed, and then the excess liquid nitrogen after gasification is discharged through the pressure relief valve.

[0031] Referring to Figures 1-4 Wherein, the upper end cover 4 is provided with a temperature monitoring device 16 in the concentration cavity 7;

[0032] Through the above structural arrangement, the temperature monitoring device 16 can accurately perceive the real-time temperature in the concentration cavity 7, if the hydrogen temperature is high, liquid nitrogen needs to be added to ensure that the temperature in the cavity meets the requirements of hydrogen purification.

[0033] It should be noted that in this paper, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

[0034] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A cryogenic hydrogen purifier, comprising a tank (1) with an open top, characterized in that: The tank body (1) is fixedly installed with an inner tank (2) for filling liquid nitrogen, and an insulated cavity (3) is provided between the tank body (1) and the inner tank (2). The tank body (1) is detachably connected with an upper end cover (4) located at the opening. A lower end cover (5) located inside the inner tank (2) is fixedly installed on one side surface of the upper end cover (4). A partition (17) is fixedly installed between the upper end cover (4) and the lower end cover (5). The partition (17) divides the space between the upper end cover (4) and the lower end cover (5) into a diversion chamber (6) located above and a concentration chamber (7) located below. A purification device (8) located inside the inner tank (2) is provided between the diversion chamber (6) and the concentration chamber (7). An inner liner (9) located outside the purification device (8) is provided inside the inner tank (2), and the inner liner (9) is connected to the inner tank (2). A closing component (10) is provided on the inner liner (9).

2. The ultra-low temperature hydrogen purifier according to claim 1, characterized in that: The tank (1) is connected to a gas pipe (11), one end of which is connected to the vacuum pump's suction end, and the other end is connected to the insulation cavity (3). The inner tank (2) is connected to a delivery pipe (12) that passes through the tank (1) and is used to deliver liquid nitrogen.

3. The cryogenic hydrogen purifier according to claim 1, characterized in that: The tank body (1) has an internal thread at the opening, and the upper cover (4) has an external thread on one side surface that matches the internal thread. The top of the upper cover (4) is polygonal.

4. The ultra-low temperature hydrogen purifier according to claim 1, characterized in that: The purification device (8) includes an air inlet pipe (81) fixedly installed on the upper end cover (4) and arranged through it. One end of the air inlet pipe (81) is connected to the diversion chamber (6). Several diversion pipes (82) are fixedly installed on the partition plate (17) and are arranged in a ring with equal spacing. One end of each diversion pipe (82) passes through the lower end cover (5) and extends to the inner liner (9). A tube body (83) fixedly installed on one side of the lower end cover (5) is sleeved on the outside of the multiple diversion pipes (82). The tube body (83) is filled with gas purification material. An air hole (84) is opened on the lower end cover (5). The two ends of the air hole (84) are connected to the central chamber (7) and the tube body (83) respectively. An air outlet pipe (85) is provided on the upper end cover (4) and is connected to the central chamber (7) at one end.

5. The ultra-low temperature hydrogen purifier according to claim 4, characterized in that: The air intake end of the air intake pipe (81) is provided with a first filter (13), the lower end cover (5) is provided with a second filter (14) located at the air hole (84), the lower end cover (5) is provided with an exhaust pipe (15) that passes through the partition plate (17) and extends to the upper end cover (4), and one end of the exhaust pipe (15) is connected to the inner liner (9), and the other end is provided with a pressure relief valve.

6. The cryogenic hydrogen purifier according to claim 1, characterized in that: The closing assembly (10) includes an interactive hole (101) for liquid nitrogen inlet and outlet. The bottom of the inner liner (9) is provided with an interactive hole (101) that communicates with the inner tank (2). A liquid nitrogen plug (102) is slidably connected in the interactive hole (101). One end of the liquid nitrogen plug (102) is rotatably connected to a hand-tightening screw (103) located in the inner liner (9). The upper end cover (4) is provided with a threaded hole (104) that is adapted to the hand-tightening screw (103).

7. The cryogenic hydrogen purifier according to claim 1, characterized in that: A temperature monitoring device (16) is provided on the upper end cover (4) and located in the central cavity (7).

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