Dual frequency rotating microwave reactor for liquid carrier reversible hydrogen storage system

Abstract

The application discloses a kind of liquid carrier reversible hydrogen storage system's double-frequency rotary microwave reactor, belong to dehydrogenation equipment field, comprising: reaction chamber, catalytic plate is fixedly arranged in reaction chamber, shell is rotatably connected with reaction chamber, shell is drivingly connected with driving mechanism, microwave heating mechanism is fixedly arranged on the inner surface of shell and with the position corresponding to reaction chamber, cooling chamber is fixedly arranged in the upper portion of reaction chamber and is communicated with reaction chamber;Through reaction chamber and microwave heating mechanism to liquid organic hydrogen storage medium for dehydrogenation, microwave heating mechanism is fixed on the shell, driving mechanism can drive shell rotation and then drive microwave heating mechanism to rotate heating reaction chamber, improve the heating uniformity and heating effect of reaction chamber, compared with the uniformity of existing fixed dehydrogenation heating mechanism heating can be improved at least 40%, combined with the catalytic effect of catalytic plate can significantly improve the dehydrogenation efficiency, reduce dehydrogenation energy consumption.

Description

Technical Field

[0001] This invention relates to the field of dehydrogenation equipment, and in particular to a dual-frequency rotary microwave reactor for a reversible hydrogen storage and release system using a liquid carrier. Background Technology

[0002] Liquid organic hydrogen storage media enable high-density, low-cost, reversible hydrogen storage and transportation, and are considered an ideal solution for mobile hydrogen storage and release technology. Compared with other liquid hydrogen carriers, "aromatic-cycloalkanes" have advantages such as high hydrogen storage density, structural stability, mature large-scale preparation technology, and low price. However, the dehydrogenation of aromatic-cycloalkanes faces the following technical challenges: the dehydrogenation reaction of cycloalkanes requires high temperatures and consumes a lot of energy; the heating efficiency and heating uniformity of existing dehydrogenation equipment are insufficient, resulting in insufficient dehydrogenation selectivity, easy C-C bond cracking and reconstruction, and ultimately leading to catalyst deactivation due to carbon deposition, as well as poor dehydrogenation effect and reduced utilization of the hydrogen storage carrier.

[0003] Therefore, how to provide a cycloalkane dehydrogenation device with low energy consumption, high heating efficiency, and good heating effect is a problem that urgently needs to be solved by those in the field. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-frequency rotary microwave reactor for a reversible hydrogen storage and release system on a liquid carrier, in order to solve the problems existing in the prior art and achieve reduced dehydrogenation energy consumption, improved heating efficiency and heating effect.

[0005] To achieve the above objectives, the present invention provides the following solution: The present invention provides a dual-frequency rotary microwave reactor for a reversible hydrogen storage and release system on a liquid carrier, comprising:

[0006] The reaction chamber contains a catalytic plate that is fixedly installed inside.

[0007] The outer shell is rotatably connected to the reaction chamber and is drive-connected to a driving mechanism, which can drive the outer shell to rotate around the reaction chamber as the center.

[0008] A microwave heating mechanism is fixedly disposed on the inner surface of the outer shell and corresponds to the position of the reaction chamber;

[0009] A cooling chamber is fixedly disposed above the reaction chamber and communicates with the reaction chamber;

[0010] A first leak-proof cover is fixedly installed above the cooling chamber and communicates with the cooling chamber. The first leak-proof cover is connected to an exhaust pipe and a drain pipe, and the height of the drain pipe is lower than the height of the exhaust pipe.

[0011] The second leak-proof cover is fixedly installed below the reaction chamber. The bottom end of the reaction chamber is connected to a liquid inlet pipe, which passes through the second leak-proof cover and extends to the outside.

[0012] Furthermore, the microwave heating mechanism includes: a first waveguide and a second waveguide, the first waveguide and the second waveguide are evenly spaced apart and have different frequencies, and the output ends of the first waveguide and the second waveguide are orthogonal.

[0013] Furthermore, the distance between the output terminals of the adjacent first waveguide and the output terminal of the second waveguide is an odd multiple of the wavelength.

[0014] Furthermore, the first waveguide is 915MHz and the second waveguide is 2450MHz.

[0015] Furthermore, there are at least six catalytic plates, which divide the reaction chamber into multiple reaction cavities, and the total number of the first waveguide and the second waveguide corresponds to the number of reaction cavities.

[0016] Furthermore, it also includes bearings and bearing clips, the reaction chamber being rotatably connected to the outer casing via the bearings and bearing clips.

[0017] Furthermore, it also includes a connecting pipe, which is fixedly installed on the top surface of the cooling chamber, with its two ends respectively connected to the cooling chamber and the first leak-proof cover.

[0018] Furthermore, it also includes an exhaust pipe, which is connected to the first leak-proof cover, and the height of the exhaust pipe is lower than the height of the exhaust pipe.

[0019] Furthermore, it also includes a temperature sensor, which is fixedly mounted on the second leak-proof cover and spaced apart from the liquid inlet pipe, with the sensing end of the temperature sensor extending into the reaction chamber.

[0020] Furthermore, the catalyst plate has a porous structure and is provided with a foamed silicon carbide carrier.

[0021] The present invention discloses the following technical effects:

[0022] 1. This invention dehydrogenates liquid organic hydrogen storage media through a reaction chamber and a microwave heating mechanism. The microwave heating mechanism is fixed to the outer shell, and the driving mechanism can drive the outer shell to rotate, thereby driving the microwave heating mechanism to rotate and heat the reaction chamber, improving the heating uniformity and heating effect of the reaction chamber. Compared with the existing fixed dehydrogenation heating mechanism, the heating uniformity can be improved by at least 40%. Combined with the catalytic effect of the catalytic plate, the dehydrogenation efficiency can be significantly improved and the dehydrogenation energy consumption can be reduced. The cooling chamber can naturally cool the high-temperature hydrogen gas generated during the dehydrogenation process, allowing it to be discharged from the exhaust pipe after cooling down. The first and second leak-proof covers are respectively set on the upper and lower sides of the reaction chamber and the microwave heating mechanism, which can achieve 1 / 4 wavelength impedance source suppression, secondary choke shielding, and prevention of microwave leakage, thereby improving overall safety.

[0023] 2. The microwave heating mechanism consists of two waveguides with different frequencies. The output ends of the two waveguides are orthogonally arranged, which can reduce the mutual coupling of microwaves generated by the two waveguides, avoid energy loss, and improve heating efficiency. At the same time, the distance between the output ends of the two waveguides is an odd multiple of the wavelength, which can also improve the microwave heating efficiency and heating uniformity.

[0024] 3. The waste liquid generated after dehydrogenation can be automatically discharged from the drain pipe. The hydrogen generated after dehydrogenation can be automatically separated from other waste gases due to its low density and light weight. The separated hydrogen is discharged from the exhaust pipe, while other waste gases are discharged from the exhaust pipe, ensuring the purity of the dehydrogenated hydrogen.

[0025] 4. A connecting pipe is installed between the cooling chamber and the first leak-proof cover. The connecting pipe can prevent the dehydrogenated hydrogen from immediately entering the first leak-proof cover and then being discharged from the exhaust pipe. Instead, the hydrogen is allowed to remain in the cooling chamber for a period of time before entering the first leak-proof cover through the connecting pipe, thus ensuring the cooling effect of the cooling chamber on the hydrogen. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 for Figure 1 Bottom structure diagram;

[0029] Figure 3 This is a schematic diagram of the internal structure after the outer shell has been removed.

[0030] Figure 4 This is a structural diagram of the bearing and bearing clip;

[0031] Figure 5 This is a schematic diagram of the connecting pipe structure;

[0032] Figure 6 This is a schematic diagram of the reaction chamber structure;

[0033] The components are as follows: 1. Reaction chamber; 101. Reaction cavity; 2. Catalytic plate; 3. Outer shell; 4. Cooling chamber; 5. First leak-proof cover; 6. Second leak-proof cover; 7. Exhaust pipe; 8. Drain pipe; 9. Inlet pipe; 10. First waveguide; 11. Second waveguide; 12. Exhaust pipe; 13. Temperature detection hole; 14. Bearing; 15. Bearing clip; 16. Connecting pipe. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Example

[0037] Reference Figures 1-5 This invention provides a dual-frequency rotary microwave reactor for a reversible hydrogen storage and release system on a liquid carrier, comprising: a reaction chamber 1, wherein a catalyst plate 2 is fixedly disposed in the reaction chamber 1, the catalyst plate 2 has a porous structure and a foamed silicon carbide carrier is disposed on the catalyst plate 2, and six catalyst plates 2 are disposed to uniformly divide the reaction chamber 1 into six reaction chambers 101 for dehydrogenating the liquid organic hydrogen storage medium; a shell 3 is rotatably connected to the reaction chamber 1 via a bearing 14 and a bearing clip 15, and the shell 3 is connected to a drive mechanism, which can drive the shell 3 to rotate around the reaction chamber 1 as the center. The drive mechanism can adopt a conventional drive motor and a corresponding transmission mechanism, which will not be described in detail here.

[0038] Sufficient installation space exists between the outer casing 3 and the reaction chamber 1. A microwave heating mechanism is fixedly mounted on the inner surface of the outer casing 3. The microwave heating mechanism includes a first waveguide 10 and a second waveguide 11, which are detachably connected to the inner surface of the outer casing 3 by bolts. The first waveguide 10 and the second waveguide 11 are evenly spaced and have different frequencies. The output terminals of the first waveguide 10 and the second waveguide 11 are orthogonal. In this embodiment, the first waveguide 10 is 915MHz, and the second waveguide 11 is... The second waveguide 11 operates at 2450MHz. The first waveguide 10 is a BJ9 waveguide with dimensions of 180mm × 123.82mm × 247.65mm, and the second waveguide 11 is a BJ26 waveguide with dimensions of 100mm × 86.36mm × 43.18mm. The reaction chamber 1 has dimensions of 150mm × 440mm. The distance between the output terminals of adjacent first waveguides 10 and second waveguides 11 is an odd multiple of the wavelength. Three first waveguides 10 and three second waveguides 11 are provided, and the distance between adjacent waveguides is the same. Cooling chamber 4 is fixedly installed above and connected to reaction chamber 1; first leak-proof cover 5 is fixedly installed above and connected to cooling chamber 4, and the first leak-proof cover 5 is connected to exhaust pipe 7 and drain pipe 8, the height of drain pipe 8 being lower than the height of exhaust pipe 7; second leak-proof cover 6 is fixedly installed below reaction chamber 1, and the bottom end of reaction chamber 1 is connected to inlet pipe 9, which penetrates the second leak-proof cover 6 and extends outward. In this embodiment, outer shell 3, first leak-proof cover 5, and second leak-proof cover 6 are all coaxial cylinders, and inlet pipe 9, exhaust pipe 7, and drain pipe 8 are generally located at the axis.

[0039] like Figure 5 As shown, this embodiment also includes a connecting pipe 16, which is fixedly installed on the top surface of the cooling chamber 4, and its two ends are respectively connected to the cooling chamber 4 and the first leak-proof cover 5.

[0040] like Figure 1 and Figure 3 As shown, this embodiment also includes an exhaust pipe 12, which is connected to the first leak-proof cover 5, and the height of the exhaust pipe 12 is lower than the height of the exhaust pipe 7.

[0041] like Figure 2 As shown, it also includes a temperature sensor. A temperature detection hole 13 is provided on the second leak-proof cover 6. The temperature sensor is fixedly installed in the temperature detection hole 13. The temperature detection hole 13 is spaced apart from the liquid inlet pipe 9. The sensing end of the temperature sensor extends into the reaction chamber 1. It should be noted that after the temperature sensor is inserted, the second leak-proof cover 6 still maintains its overall sealing, which can prevent microwave leakage and prevent liquid and gas leakage.

[0042] The specific work process is as follows:

[0043] Liquid organic hydrogen storage medium is introduced into reaction chamber 1 through inlet pipe 9. The drive mechanism, first waveguide 10 and second waveguide 11 are started. The drive mechanism drives the outer shell 3 to rotate around the reaction chamber 1 as the axis. The first waveguide 10 and second waveguide 11 rotate and heat the reaction chamber 1. During the heating process, the temperature in the reaction chamber 1 is monitored by temperature sensor. By confirming the temperature of the reaction chamber 1, the dehydrogenation efficiency, heating efficiency and reaction temperature of the liquid organic hydrogen storage medium can be determined.

[0044] After continuous heating for a period of time, the hydrogen produced by the reaction rises from the reaction chamber 1 to the cooling chamber 4. As the liquid organic hydrogen storage medium is continuously introduced into the liquid inlet pipe 9, the liquid organic hydrogen storage medium after the reaction will naturally rise into the cooling chamber 4. The liquid organic hydrogen storage medium entering the cooling chamber 4 will cool down rapidly and can be used as a natural cooling medium for the hydrogen. After the hydrogen is cooled in the cooling chamber 4, it slowly moves to the connecting pipe 16 and enters the first leak-proof cover 5 from the connecting pipe 16. Finally, it is discharged from the exhaust pipe 7 and collected and stored by the hydrogen storage equipment.

[0045] During the dehydrogenation process, the generated gas is more than 99% hydrogen, which has a very high purity. Only a very small portion is waste gas. In order to ensure the purity of the hydrogen generated during dehydrogenation, the waste gas can sink naturally due to the difference in density between it and hydrogen, and be discharged from the waste gas pipe 12 for centralized treatment.

[0046] The dehydrogenated liquid organic hydrogen storage medium becomes waste liquid. Under the influence of the continuous input of new liquid organic hydrogen storage medium below, the liquid level gradually rises. When the waste liquid level reaches the waste liquid pipe, the waste liquid is discharged from the waste liquid pipe.

[0047] Test case

[0048] The reaction chamber 1 is divided into two, four, and six reaction chambers 101 by the catalyst plate 2. Tests show that when there are six reaction chambers 101, the first waveguide 10 and the second waveguide 11 have the best heating effect on the reaction chamber 1. Compared with the existing fixed dehydrogenation heating mechanism, the heating uniformity can be improved by 47%. Combined with the catalytic effect of the catalyst plate 2, the hydrogen production efficiency can be greatly improved.

[0049] This invention discloses a dual-frequency rotary microwave reactor for a reversible hydrogen storage and release system on a liquid carrier. The reactor dehydrogenates a liquid organic hydrogen storage medium via a reaction chamber 1 and a microwave heating mechanism. The microwave heating mechanism is fixed to the outer shell 3, and a driving mechanism drives the outer shell 3 to rotate, thereby rotating and heating the reaction chamber 1. This improves the heating uniformity and effect of the reaction chamber 1. Compared to existing fixed dehydrogenation heating mechanisms, the heating uniformity can be improved by at least 40%. Combined with the catalytic effect of the catalyst plate 2, this significantly improves the dehydrogenation efficiency and reduces dehydrogenation energy consumption. The cooling chamber 4 naturally cools the high-temperature hydrogen gas generated during the dehydrogenation process, allowing it to cool down before being discharged through the exhaust pipe 7. A first leak-proof cover 5 and a second leak-proof cover 6 are respectively installed on the upper and lower sides of the reaction chamber 1 and the microwave heating mechanism, achieving 1 / 4 wavelength impedance source suppression, secondary choke shielding, and prevention of microwave leakage, thus improving overall safety. The microwave heating mechanism consists of two waveguides of different frequencies, with their output ends orthogonally arranged. This reduces the coupling between the microwaves generated by the two waveguides, preventing energy loss and improving heating efficiency. Simultaneously, the distance between the output ends of the two waveguides is an odd multiple of the wavelength, further enhancing microwave heating efficiency and uniformity. The waste liquid generated after dehydrogenation is automatically discharged from the drain pipe 8. The hydrogen gas generated after dehydrogenation automatically separates from other waste gases due to its low density and light weight. The separated hydrogen gas is discharged from the exhaust pipe 7, while other waste gases are discharged from the exhaust pipe 12, ensuring the purity of the dehydrogenated hydrogen. A connecting pipe is installed between the cooling chamber 4 and the first leak-proof cover 5. This connecting pipe prevents the dehydrogenated hydrogen gas from immediately entering the first leak-proof cover 5 and then being discharged from the exhaust pipe 7. Instead, it causes the hydrogen gas to remain in the cooling chamber 4 for a period before entering the first leak-proof cover 5 through the connecting pipe, ensuring the cooling effect of the cooling chamber 4 on the hydrogen gas.

[0050] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0051] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A dual frequency rotating microwave reactor for a liquid carrier reversible hydrogen storage system, characterized in that, include: A reaction chamber (1) is provided with a catalyst plate (2) fixedly installed inside the reaction chamber (1); The outer shell (3) is rotatably connected to the reaction chamber (1), and the outer shell (3) is connected to the drive mechanism. The drive mechanism can drive the outer shell (3) to rotate around the reaction chamber (1) as the center. A microwave heating mechanism is fixedly disposed on the inner surface of the outer shell (3) and corresponds to the position of the reaction chamber (1); Cooling chamber (4), the cooling chamber (4) is fixedly installed above the reaction chamber (1) and communicates with the reaction chamber (1); The first leak-proof cover (5) is fixedly installed above the cooling chamber (4) and communicates with the cooling chamber (4). The first leak-proof cover (5) is connected to an exhaust pipe (7) and a drain pipe (8). The height of the drain pipe (8) is lower than the height of the exhaust pipe (7). The second leak-proof cover (6) is fixedly installed below the reaction chamber (1). The bottom end of the reaction chamber (1) is connected to the liquid inlet pipe (9). The liquid inlet pipe (9) passes through the second leak-proof cover (6) and extends to the outside. The microwave heating mechanism includes: a first waveguide (10) and a second waveguide (11), the first waveguide (10) and the second waveguide (11) are evenly spaced and the first waveguide (10) and the second waveguide (11) have different frequencies, and the output end of the first waveguide (10) and the output end of the second waveguide (11) are orthogonal; The distance between the output terminals of the adjacent first waveguide (10) and the output terminal of the second waveguide (11) is an odd multiple of the wavelength; The catalyst plate (2) has at least six parts, and the catalyst plate (2) divides the reaction chamber (1) into multiple reaction cavities (101). The total number of the first waveguide (10) and the second waveguide (11) corresponds to the number of reaction cavities (101). It also includes a connecting pipe (16), which is fixedly installed on the top surface of the cooling chamber (4), and its two ends are respectively connected to the cooling chamber (4) and the first anti-leakage cover (5).

2. A dual frequency rotating microwave reactor for a liquid carrier reversible hydrogen storage system according to claim 1, wherein, The first waveguide (10) is 915MHz and the second waveguide (11) is 2450MHz.

3. A dual frequency rotating microwave reactor for a liquid carrier reversible hydrogen storage system according to claim 1, wherein, It also includes a bearing (14) and a bearing clip (15), the reaction chamber (1) being rotatably connected to the outer shell (3) via the bearing (14) and the bearing clip (15).

4. The dual-frequency rotary microwave reactor for a reversible hydrogen storage and release system on a liquid carrier according to claim 1, characterized in that, It also includes an exhaust pipe (12), which is connected to the first leak-proof cover (5), and the height of the exhaust pipe (12) is lower than the height of the exhaust pipe (7).

5. The dual frequency rotating microwave reactor for a liquid carrier reversible hydrogen storage system of claim 1, wherein, It also includes a temperature sensor, which is fixedly mounted on the second leak-proof cover (6) and spaced apart from the liquid inlet pipe (9). The sensing end of the temperature sensor extends into the reaction chamber (1).

6. A dual frequency rotating microwave reactor for a liquid carrier reversible hydrogen storage system according to claim 1, wherein, The catalyst plate (2) has a porous structure and a foamed silicon carbide carrier is provided on the catalyst plate (2).

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