Pressure swing adsorption hydrogen production device

Abstract

The utility model discloses a pressure swing adsorption hydrogen production device which comprises an adsorption box, an adsorption module is arranged in the adsorption box, and the adsorption module is filled with an adsorbent; an air inlet pipe and an exhaust pipe are further arranged on the adsorption box, the air inlet pipe is communicated with the inlet end of the adsorption module, and the exhaust pipe is communicated with the outlet end of the adsorption module; the adsorption box is further filled with a heat exchange medium, and the adsorption module is wrapped with the heat exchange medium. Compared with the prior art, the hydrogen production device has the advantages that redundant heat in the gas adsorption process is converted into heat for heat preservation in the gas release process through the heat exchange medium, so that reasonable allocation and recycling of the heat are realized between the gas adsorption process and the gas release process, the energy consumption of the whole hydrogen production device is reduced, and the operation cost of the equipment is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of methanol hydrogen production equipment, and specifically to a pressure swing adsorption hydrogen production device. Background Art

[0002] Methanol-to-hydrogen is currently the primary hydrogen production technology used in my country. The tail gas from methanol-to-hydrogen production primarily consists of hydrogen and carbon dioxide. Existing technology typically separates these gases through pressure swing adsorption (PSA). However, the adsorption beds used in these PSA processes generate significant heat during the adsorption process, hindering the adsorption of impurity gases. Furthermore, the use of large amounts of hydrogen during bed desorption and regeneration reduces hydrogen yield, while the use of compressors or vacuum pumps increases the cost of PSA hydrogen production. Summary of the Invention

[0003] The main purpose of this application is to provide a pressure swing adsorption hydrogen production device, aiming to solve the defect of high adsorption cost in the prior art.

[0004] This application achieves the above objectives through the following technical solutions:

[0005] A pressure swing adsorption hydrogen production device includes an adsorption box;

[0006] An adsorption module is provided in the adsorption box and is filled with an adsorbent; the adsorption box is further provided with an air inlet pipe and an exhaust pipe, the air inlet pipe is connected to the inlet end of the adsorption module, and the exhaust pipe is connected to the outlet end of the adsorption module;

[0007] A heat exchange medium is filled in the adsorption box, and the adsorption module is wrapped by the heat exchange medium.

[0008] Optionally, the adsorption module includes an upper mounting plate, a lower mounting plate and several adsorption tubes, and the adsorption tubes are separated from each other; the upper mounting plate and the lower mounting plate are both provided with several mounting holes, and the two ends of each adsorption tube are respectively plugged into and connected to the mounting holes on the same side.

[0009] Optionally, the upper mounting plate and the lower mounting plate are respectively connected to the adsorption box by welding; a connecting sleeve is provided in each of the mounting holes, and both ends of each of the adsorption tubes are respectively threadedly connected to the two connecting sleeves.

[0010] Optionally, each of the adsorption tubes includes a first tube body, a reducer and a second tube body, the outer diameter of the first tube body is coaxially connected to the large end of the reducer, and the second tube body is coaxially connected to the small end of the reducer; the first tube body and the second tube body are respectively threadedly connected to the connecting sleeve.

[0011] Optionally, the adsorption box includes a box body, the top of the box body is connected to an upper sealing cover, and the bottom of the box body is connected to a lower sealing cover; the upper sealing cover is connected to the exhaust pipe, and the lower sealing cover is connected to the intake pipe.

[0012] Optionally, both the upper sealing cover and the lower sealing cover are provided with sealing grooves, and sealing rubber rings are provided in the sealing grooves. The upper and lower sides of the box body are provided with sealing rings, and the sealing rings are respectively inserted into the two sealing grooves.

[0013] Optionally, the heat exchange medium is a phase change heat storage medium prepared using molten salt.

[0014] Optionally, the heat exchange medium is heat exchange oil, and the adsorption box is provided with a feed pipe and a discharge pipe; the hydrogen production device also includes a circulation module for controlling the circulation flow of the heat exchange oil, and the circulation module connects the feed pipe with the discharge pipe.

[0015] Optionally, the circulation module includes a temporary storage box and a circulation pump, the outlet end of the circulation pump is connected to the feed pipe, and the inlet end thereof is connected to the temporary storage box; the temporary storage box is connected to the discharge pipe through a return pipe.

[0016] Optionally, the outer surface of the temporary storage box is wrapped with a heat insulation layer.

[0017] Compared with the prior art, this application has the following effects:

[0018] The present application includes an adsorption box, which is equipped with an adsorption module, and the adsorption module is filled with adsorbent; the adsorption box is also provided with an air inlet pipe and an exhaust pipe, the air inlet pipe is connected to the inlet end of the adsorption module, and the exhaust pipe is connected to the outlet end of the adsorption module; the adsorption box is also filled with a heat exchange medium, and the heat exchange medium wraps the adsorption module.

[0019] During use, the gas to be adsorbed enters the adsorption module from the air inlet pipe, and the adsorbent absorbs the impurities in the exhaust gas. At the same time, the high-purity hydrogen after adsorption is discharged from the exhaust pipe. During the adsorption process, the temperature of the adsorbent gradually increases. At this time, the heat exchange medium with a lower temperature absorbs heat and cools the entire adsorption module, thereby ensuring that the temperature of the adsorbent is moderate and in the best working condition.

[0020] When the adsorbent is saturated, the air inlet pipe is closed. At this time, the temperature and pressure of the entire adsorption module will gradually decrease due to the lack of external air source, and the adsorbed impurity gas will be released. At the same time, as the impurity gas is released, its temperature drops further. At this time, the heat released by the heat exchange medium ensures that the temperature of the adsorbent is within the optimal release temperature range, thereby achieving efficient and stable release of impurity gas.

[0021] Compared with the prior art, the present invention converts excess heat during the gas adsorption process into heat for thermal insulation during the gas release process through a heat exchange medium, thereby achieving reasonable allocation and reuse of heat between the gas adsorption and release processes, thereby reducing the energy consumption of the entire hydrogen production device and further reducing the operating costs of the equipment;

[0022] Secondly, this application can achieve the above functions by adding a heat exchange medium, which requires relatively little modification to the hydrogen production equipment and has low modification costs, which is conducive to the promotion and application of the technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a pressure swing adsorption hydrogen production device provided in embodiment 1 of the present application;

[0024] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0025] Figure 3 A schematic diagram of the structure of another optional technical solution for a pressure swing adsorption hydrogen production device;

[0026] Figure markings: 1-adsorption box, 2-adsorbent, 3-inlet pipe, 4-exhaust pipe, 5-heat exchange medium, 6-upper mounting plate, 7-lower mounting plate, 8-adsorption tube, 9-mounting hole, 10-connecting sleeve, 11-feed pipe, 12-discharge pipe, 13-temporary storage box, 14-circulation pump, 15-reflux pipe, 16-insulation layer, 101-box body, 102-upper sealing cover, 103-lower sealing cover, 104-sealing groove, 105-sealing rubber ring, 106-sealing ring, 801-first tube body, 802-large and small heads, 803-second tube body.

[0027] The purpose, features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] Implementation Method 1

[0033] Reference Figures 1 to 3 This embodiment, as an optional embodiment of the present application, discloses a pressure swing adsorption hydrogen production device, including an adsorption box 1, the adsorption box 1 includes a box body 101, the top of the box body 101 is connected to an upper sealing cover 102, and the bottom of the box body 101 is connected to a lower sealing cover 103.

[0034] The box body 101 is connected to the upper sealing cover 102 by a plurality of connecting bolts, and the box body 101 is connected to the lower sealing cover 103 by a plurality of connecting bolts;

[0035] At the same time, a sealing groove 104 is provided on the upper sealing cover 102 and the lower sealing cover 103, and a sealing rubber ring 105 is embedded in each of the two sealing grooves 104. At the same time, a sealing ring 106 is provided on the upper end surface and the lower end surface of the box body 101. The two sealing rings 106 are respectively inserted into the two sealing grooves 104. At the same time, the connecting bolts are connected to squeeze the sealing rubber ring to seal the entire sealing groove 104.

[0036] The upper sealing cover 102 is provided with an exhaust pipe 4, and the lower sealing cover 103 is connected to an intake pipe 3;

[0037] The above structure enables the entire equipment to have strong disassembly and maintenance capabilities, making it convenient for staff to overhaul the equipment at any time and improving overhaul efficiency.

[0038] An adsorption module is also provided in the adsorption box 1, and the adsorption module includes an upper mounting plate 6, a lower mounting plate 7 and a plurality of adsorption tubes 8. The upper mounting plate 6 is provided on the upper side of the adsorption box 1, and the lower mounting plate 7 is provided on the lower side of the adsorption box 1. The upper mounting plate 6 and the lower mounting plate 7 are both connected to the adsorption box 1 by welding;

[0039] Each adsorption tube 8 is arranged between the upper mounting plate 6 and the lower mounting plate 7, and each adsorption tube 8 is arranged along the axial direction of the adsorption box 1; a plurality of mounting holes 9 are provided on the upper mounting plate 6 and the lower mounting plate 7, and a connecting sleeve 10 is provided in each mounting hole 9 by welding;

[0040] It should be noted that the inner diameter of the connecting sleeve 10 provided on the upper mounting plate 6 is 1.1-1.2 times the inner diameter of the connecting sleeve 10 provided on the lower mounting plate 7;

[0041] At the same time, each of the adsorption tubes 8 includes a first tube body 801, a reducer 802, and a second tube body 803. The outer diameter of the first tube body 801 is coaxially connected to the large end of the reducer 802, and the second tube body 803 is coaxially connected to the small end of the reducer 802.

[0042] The first tube 801 is threadedly connected to the connecting sleeve 10 located on the upper mounting plate 6, and the second tube 803 is threadedly connected to the connecting sleeve 10 located on the lower mounting plate 7;

[0043] Through the above connection method, a closed space is formed between the upper mounting plate 6 and the lower mounting plate 7, and the closed space is filled with a heat exchange medium 5;

[0044] On the other hand, in the above structure, the adsorption tube 8 can be disassembled and installed as needed, which reduces the maintenance difficulty of the equipment as much as possible;

[0045] Secondly, the configuration of the large and small heads 802 allows the outer shape of the adsorption tube 8 to be transformed into a structure with one end larger than the other. Due to the change in outer diameter, the small end of the adsorption tube 8 can be easily and quickly passed through the connecting sleeve 10 on the upper mounting plate 6 during plug-in installation, thereby minimizing the difficulty of installing the adsorption tube 8.

[0046] At the same time, an adjusting nut with a regular hexagonal structure is integrally connected to the free end of the first tube body 801 of the adsorption tube 8 .

[0047] It should be noted that a material pipe is also provided on the outer axial surface of the adsorption box 1. The heat storage medium is a phase change heat storage medium prepared by molten salt. When in use, the material pipe is sealed by a sealing cover or other equipment.

[0048] During use, the heat generated by the adsorbent 2 during the adsorption process is transferred to the heat exchange medium 5 through the adsorption tube 8, and the heat exchange medium 5 absorbs heat and stores energy; when releasing impurity gas, a temperature difference is formed between the adsorbent 2 and the heat storage medium. At this time, the heat released by the heat exchange medium 5 heats the adsorbent 2, thereby maintaining the temperature of the adsorbent 2 in the optimal working range.

[0049] Furthermore, the heat exchange medium 5 is heat exchange oil, and the adsorption box 1 is provided with a feed pipe 11 and a discharge pipe 12; the hydrogen production device also includes a circulation module, and the circulation module includes a temporary storage box 13 and a circulation pump 14, the outlet end of the circulation pump 14 is connected to the feed pipe 11, and the inlet end thereof is connected to the temporary storage box 13; the temporary storage box 13 is connected to the discharge pipe 12 through a return pipe 15; and the outer surface of the temporary storage box 13 is also wrapped with a heat insulation layer 16;

[0050] Compared with the heat storage medium prepared from molten salt, the heat exchange oil has a lower specific heat capacity. Therefore, the heat exchange oil is circulated by the circulation pump 14 to transfer the heat to the temporary storage box 13 in time, and then re-input through the heat exchange oil when needed.

[0051] Compared with the prior art, the present invention converts excess heat during the gas adsorption process into heat for thermal insulation during the gas release process through a heat exchange medium, thereby achieving reasonable allocation and reuse of heat between the gas adsorption and release processes, thereby reducing the energy consumption of the entire hydrogen production device and further reducing the operating costs of the equipment;

[0052] Secondly, this application can achieve the above functions by adding a heat exchange medium, which requires relatively little modification to the hydrogen production equipment and has low modification costs, which is conducive to the promotion and application of the technology.

[0053] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A pressure swing adsorption hydrogen production device, characterized in that: It includes an adsorption box (1); An adsorption module, the adsorption module being arranged in the adsorption box (1), and the adsorption module being filled with an adsorbent (2); an air inlet pipe (3) and an air outlet pipe (4) being further arranged on the adsorption box (1), the air inlet pipe (3) being in communication with an inlet end of the adsorption module, and the air outlet pipe (4) being in communication with an outlet end of the adsorption module; A heat exchange medium (5), the heat exchange medium (5) is filled in the adsorption box (1), and the heat exchange medium (5) wraps the adsorption module.

2. A pressure swing adsorption hydrogen production device according to claim 1, characterized in that: The adsorption module comprises an upper mounting plate (6), a lower mounting plate (7) and a plurality of adsorption tubes (8), and the adsorption tubes (8) are separated from each other; the upper mounting plate (6) and the lower mounting plate (7) are both provided with a plurality of mounting holes (9), and the two ends of each adsorption tube (8) are respectively plugged and connected to the mounting holes (9) on the same side.

3. A pressure swing adsorption hydrogen production device according to claim 2, characterized in that: The upper mounting plate (6) and the lower mounting plate (7) are respectively connected to the adsorption box (1) by welding; a connecting sleeve (10) is provided in each mounting hole (9), and both ends of each adsorption tube (8) are respectively connected to the two connecting sleeves (10) by thread.

4. A pressure swing adsorption hydrogen production device according to claim 3, characterized in that: Each of the adsorption tubes (8) comprises a first tube body (801), a reducer (802) and a second tube body (803); the outer diameter of the first tube body (801) is coaxially connected to the large end of the reducer (802); and the second tube body (803) is coaxially connected to the small end of the reducer (802); the first tube body (801) and the second tube body (803) are respectively threadedly connected to the connecting sleeve (10).

5. A pressure swing adsorption hydrogen production device according to claim 1, characterized in that: The adsorption box (1) comprises a box body (101), the top of the box body (101) is connected to an upper sealing cover (102), and the bottom of the box body (101) is connected to a lower sealing cover (103); the upper sealing cover (102) is connected to the exhaust pipe (4), and the lower sealing cover (103) is connected to the intake pipe (3).

6. A pressure swing adsorption hydrogen production device according to claim 5, characterized in that: The upper sealing cover (102) and the lower sealing cover (103) are both provided with sealing grooves (104), and sealing rubber rings (105) are provided in the sealing grooves (104). The upper and lower sides of the box body (101) are both provided with sealing rings (106), and the sealing rings (106) are respectively inserted into the two sealing grooves (104).

7. A pressure swing adsorption hydrogen production device according to claim 1, characterized in that: The heat exchange medium (5) is a phase-change heat storage medium prepared using molten salt.

8. The pressure swing adsorption hydrogen production device according to claim 1, characterized in that: The heat exchange medium (5) is heat exchange oil, and the adsorption box (1) is provided with a feed pipe (11) and a discharge pipe (12); the hydrogen production device also includes a circulation module for controlling the circulation flow of the heat exchange oil, and the circulation module connects the feed pipe (11) and the discharge pipe (12).

9. A pressure swing adsorption hydrogen production device according to claim 8, characterized in that: The circulation module comprises a temporary storage box (13) and a circulation pump (14), wherein the outlet end of the circulation pump (14) is connected to the feed pipe (11), and the inlet end thereof is communicated with the temporary storage box (13); the temporary storage box (13) is communicated with the discharge pipe (12) via a return pipe (15).

10. A pressure swing adsorption hydrogen production device according to claim 9, characterized in that: The outer surface of the temporary storage box (13) is wrapped with a heat insulation layer (16).

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