Methanol hydrogen efficient reaction device

Abstract

This utility model provides a high-efficiency methanol-to-hydrogen reaction device, relating to the technical field of methanol-to-hydrogen reaction devices. It includes an outer tube, an inner tube, and a heater. An inner tube is disposed inside the outer tube, and the inner and outer tubes are connected by a partition. The inner diameter of the outer tube is larger than the outer diameter of the inner tube to form a jacket for accommodating the catalyst. The partition divides the jacket into a first reaction zone and a second reaction zone. An inlet port and an outlet port are inserted into the top surface of the outer tube. The inlet port connects to the top of the first reaction zone, and the outlet port connects to the top of the second reaction zone. The heater is installed on the outside of the outer tube. The inner tube includes an outer tube and an inner tube. A limiting mechanism is provided on the top surface of the end cap. By designing the reaction tube as a double-layered rotatable structure and opening through holes on the surfaces of the inner and outer tubes, dynamic turbulence is formed when the reaction gas flows through the catalyst layer, enhancing the contact efficiency between the gas and the catalyst.

Description

Technical Field

[0001] This utility model relates to the technical field of methanol-to-hydrogen reaction devices, and in particular to a high-efficiency methanol-to-hydrogen reaction device. Background Technology

[0002] Methanol to hydrogen production is a hydrogen production process that uses methanol and water vapor under set temperature and pressure conditions, along with a catalyst, to cause methanol to undergo a cracking reaction and a carbon monoxide conversion reaction, producing hydrogen and carbon dioxide. The hydrogen and carbon dioxide are then separated to obtain the desired hydrogen.

[0003] Chinese Patent Publication No. CN219291362U discloses a methanol-to-hydrogen reaction apparatus, comprising: a reaction chamber; the reaction chamber includes: an outer tube, an inner tube coaxially inserted within the outer tube, and a partition connecting the outer tube and the inner tube; the inner diameter of the outer tube is larger than the outer diameter of the inner tube to form a jacket for accommodating a catalyst; the partition divides the jacket into a first reaction zone and a second reaction zone, and the bottoms of the first reaction zone and the bottoms of the second reaction zone are interconnected; an inlet port connecting to the reaction chamber; the inlet port connecting to the top of the first reaction zone; an outlet port connecting to the reaction chamber; the outlet port connecting to the top of the second reaction zone; a heater connecting to the reaction chamber; the heater includes: a first heating wire uniformly wound around the outside of the outer tube and a second heating wire uniformly wound around the inside of the inner tube; and a temperature monitoring assembly connecting to the reaction chamber; the temperature monitoring assembly includes: a first temperature sensor connected to the first reaction zone, a second temperature sensor connected to the second reaction zone, and a third temperature sensor connected to the inner cavity of the outer tube;

[0004] In this existing design, although a jacket can be set in the reaction chamber, and the inner and outer rings can be heated by the cooperation of the first heating wire located on the outside of the jacket and the second heating wire located on the inside of the jacket, which improves the uniformity and controllability of the heating temperature and improves the conversion rate and selectivity in the production process, the static jacket catalyst bed design results in uneven distribution of reactants due to the unidirectional flow of gas. The reaction rate in the area near the heating wire is much higher than that in the central area, and unreacted methanol is prone to accumulate in dead corners, reducing the overall conversion rate and increasing the subsequent purification cost.

[0005] Therefore, a high-efficiency methanol-to-hydrogen reactor was designed to solve the above problems. Utility Model Content

[0006] To address the problems mentioned in the background section, this invention provides a highly efficient methanol-to-hydrogen reaction device with adjustable catalytic efficiency.

[0007] This utility model adopts the following technical solution: a methanol-to-hydrogen high-efficiency reaction device, including an outer tube, an inner tube, and a heater. The inner tube is arranged inside the outer tube, and the inner tube and the outer tube are connected by a partition. The inner diameter of the outer tube is larger than the outer diameter of the inner tube to form a jacket for accommodating the catalyst. The partition divides the jacket into a first reaction zone and a second reaction zone. An inlet port and an outlet port are inserted into the top surface of the outer tube. The inlet port is connected to the top of the first reaction zone, and the outlet port is connected to the top of the second reaction zone. The heater is installed on the outside of the outer tube. The inner tube includes an outer tube and an inner tube. The inner tube is sleeved inside the outer tube. Through holes are opened on the surface of both the outer tube and the inner tube. The inner tube is rotatably connected to the inside of the outer tube through an end cap. A limit mechanism is provided on the top surface of the end cap.

[0008] The limiting mechanism includes a connecting rod and a fixing block. The connecting rod is installed at the top end of the inner tube, and the fixing block is installed on the top surface of the end cap. A long block is installed at the top end of the connecting rod, and a limiting groove is formed on the side of the long block. A groove is formed on the side of the fixing block, and a spring is installed inside the groove. A limiting block is installed at one end of the spring.

[0009] As a preferred embodiment of the methanol-to-hydrogen high-efficiency reaction device of this utility model, a temperature sensor is installed on the top surface of the outer tube.

[0010] In a preferred embodiment of the methanol-to-hydrogen high-efficiency reaction device of this utility model, the through holes include coarse holes, fine holes, and auxiliary holes. The through holes opened on the surface of the outer tube are the auxiliary holes, and the through holes opened on the surface of the inner tube are coarse holes and fine holes, respectively.

[0011] As a preferred embodiment of the methanol-to-hydrogen high-efficiency reaction device of this utility model, the auxiliary holes are evenly distributed on the surface of the outer tube.

[0012] In a preferred embodiment of the methanol-to-hydrogen high-efficiency reaction device of this utility model, the fine pores are uniformly distributed on one side of the inner tube and the first reaction zone, and the coarse pores are uniformly distributed on the side where the inner tube and the second reaction zone are connected.

[0013] In a preferred embodiment of the methanol-to-hydrogen high-efficiency reaction device of this utility model, the limiting groove is semi-circular in shape, the limiting block is spherical in shape, and the sizes of the limiting groove and the limiting block are matched.

[0014] As a preferred embodiment of the methanol-to-hydrogen high-efficiency reaction device of this utility model, the top surface of the end cap is provided with a scale, and the spacing between the scale grooves on the surface of the scale is 120°.

[0015] As a preferred embodiment of the methanol-to-hydrogen high-efficiency reaction device of this utility model, there are three sets of fixing blocks, and the positions of the three sets of fixing blocks correspond to the scale grooves on the surface of the scale.

[0016] As a preferred embodiment of the methanol-to-hydrogen high-efficiency reaction device of this utility model, a rotating block is installed on the top surface of the long block.

[0017] Compared with the prior art, the advantages and positive effects of this utility model are as follows: by designing the reaction tube as a double-layered rotatable structure with through holes on the inner and outer tube surfaces, the reaction gas forms dynamic turbulence when flowing through the catalyst layer, which enhances the contact efficiency between the gas and the catalyst, reduces local reaction dead zones, and the rotation of the inner tube drives the micro-movement of the catalyst, avoiding sintering or activity reduction caused by long-term fixed accumulation of the catalyst, thus extending the service life of the catalyst. The limiting mechanism adopts a spring pre-tightening mechanical locking method, which automatically fixes the angle of the inner tube after rotation adjustment, ensuring the uniformity of airflow distribution while maintaining structural stability without the need for additional power input. The double-layered tube wall through hole structure forms a multi-stage reaction path, and methanol vapor achieves step-by-step cracking when passing through different pore sizes, which improves hydrogen yield and reduces by-product generation. Attached Figure Description

[0018] Figure 1 This invention provides a schematic diagram of a high-efficiency methanol-to-hydrogen reaction device;

[0019] Figure 2 A schematic diagram of the inner tube of a high-efficiency methanol-to-hydrogen reactor is provided for this utility model.

[0020] Figure 3 A cross-sectional view of a high-efficiency methanol-to-hydrogen reaction device is provided for this utility model;

[0021] Figure 4 This invention proposes a high-efficiency methanol-to-hydrogen reaction device. Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 This invention proposes a high-efficiency methanol-to-hydrogen reaction device. Figure 3 Enlarged view at point B in the middle;

[0023] Figure 6 This invention presents a top view of a high-efficiency methanol-to-hydrogen reaction device.

[0024] Legend:

[0025] 1. Outer tube; 2. Inner tube; 201. Outer tube; 202. Inner tube; 203. Through hole; 2031. Coarse hole; 2032. Fine hole; 2033. Auxiliary hole; 3. Partition; 4. Interlayer; 5. Air inlet port; 6. Air outlet port; 7. Heater; 8. End cap; 9. Limiting mechanism; 901. Connecting rod; 902. Fixing block; 903. Long block; 904. Limiting groove; 905. Groove; 906. Spring; 907. Limiting block; 10. Temperature sensor; 11. Dial; 12. Rotating block. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification. Example

[0028] In the existing technology, the existing methanol-to-hydrogen reactor includes an outer tube 1, an inner tube 2, and a heater 7. The inner tube 2 is housed inside the outer tube 1, and the inner tube 2 and outer tube 1 are connected by a partition 3. The inner diameter of the outer tube 1 is larger than the outer diameter of the inner tube 2 to form a jacket 4 for housing the catalyst. The partition 3 divides the jacket 4 into a first reaction zone and a second reaction zone. An inlet port 5 and an outlet port 6 are inserted into the top surface of the outer tube 1. The inlet port 5 connects to the top of the first reaction zone, and the outlet port 6 connects to the top of the second reaction zone. The heater 7 is installed on the outside of the outer tube 1. This methanol-to-hydrogen reactor also includes a heater... The device comprises: a first heating wire uniformly wound on the outer side of the outer tube and a second heating wire uniformly wound on the inner side of the inner tube; and a temperature monitoring assembly connected to the reaction chamber. The temperature monitoring assembly includes: a first temperature sensor connected to the first reaction zone, a second temperature sensor connected to the second reaction zone, and a third temperature sensor connected to the inner cavity of the outer tube. A jacket is provided in the reaction chamber. The first heating wire, located on the outer side of the jacket, and the second heating wire, located on the inner side of the jacket, work together to achieve heating of the inner and outer rings, thereby improving the uniformity and controllability of the heating temperature and improving the conversion rate and selectivity in the production process.

[0029] This application incorporates the aforementioned prior art, such as Figures 1 to 6As shown, this utility model provides a technical solution: a methanol-to-hydrogen high-efficiency reaction device, the inner tube 2 includes an outer tube 201 and an inner tube 202, the inner tube 202 is sleeved inside the outer tube 201, and through holes 203 are opened on the surface of both the outer tube 201 and the inner tube 202. The inner tube 202 is rotatably connected to the inside of the outer tube 1 through an end cap 8, and a limit mechanism 9 is provided on the top surface of the end cap 8;

[0030] The limiting mechanism 9 includes a connecting rod 901 and a fixing block 902. The connecting rod 901 is installed at the top of the inner tube 202, and the fixing block 902 is installed on the top surface of the end cover 8. A long block 903 is installed at the top of the connecting rod 901. A limiting groove 904 is opened on the side of the long block 903. A groove 905 is opened on the side of the fixing block 902. A spring 906 is installed inside the groove 905. A limiting block 907 is installed at one end of the spring 906.

[0031] In this embodiment, an inner tube 202 and an outer tube 201 are provided. By designing the reaction tube as a double-layered rotatable structure, and opening through holes 203 on the surface of both the inner tube 202 and the outer tube 201, the reaction gas can form dynamic turbulence when flowing through the catalyst layer, which enhances the contact efficiency between the gas and the catalyst. At the same time, a limiting mechanism 9 is also provided. Through the interlocking between the limiting block 907 and the limiting groove 904, tactile feedback can be provided to the user, making it easy for the user to quickly adjust the position of the inner tube 202 and the outer tube 201.

[0032] Combining the above solutions:

[0033] Furthermore:

[0034] like Figure 1 and Figure 3 As shown;

[0035] In an optional embodiment, a temperature sensor 10 is mounted on the top surface of the outer tube 1 for temperature detection.

[0036] In this embodiment, the temperature of the inner and outer rings of the reaction tube can be controlled according to the temperature requirements of the reaction tube, thereby meeting the temperature requirements of the reaction. It has a simple structure, good heating uniformity and strong controllability, high temperature control accuracy, and small space occupation.

[0037] Combining the above solutions:

[0038] Furthermore:

[0039] like Figures 2 to 3 As shown;

[0040] In order to adjust the aperture, in an optional embodiment, the through hole 203 includes a coarse hole 2031, a fine hole 2032 and an auxiliary hole 2033. The through hole 203 opened on the surface of the outer tube 201 is the auxiliary hole 2033, and the through holes 203 opened on the surface of the inner tube 202 are the coarse hole 2031 and the fine hole 2032 respectively.

[0041] In this embodiment: during the rotation of the inner tube 202, the holes are completely misaligned, and the airflow only passes through the bottom connecting area, which is suitable for use in high flow rate conditions. Aligning half of the holes allows for use in standard reaction mode, while aligning all the holes is suitable for use in high catalytic demand conditions. By rotating the inner tube 202, the relationship between the coarse holes 2031, the fine holes 2032, and the auxiliary holes 2033 can be adjusted, thereby controlling the contact efficiency between the gas and the catalyst.

[0042] Combining the above solutions:

[0043] Furthermore:

[0044] like Figures 2 to 3 As shown;

[0045] In an optional embodiment, to align the holes, auxiliary holes 2033 are evenly distributed on the surface of the outer tube 201.

[0046] In this embodiment, the auxiliary hole 2033 is a long, oblique groove, which facilitates the formation of cross airflow with the coarse hole 2031 and fine hole 2032 on the surface of the inner tube 202. This allows the auxiliary hole 2033 to be evenly distributed on the surface of the outer tube 201. In other words, the auxiliary hole 2033 is fixed with the outer tube 201. When the inner tube 202 is rotated, the coarse hole 2031, fine hole 2032 and auxiliary hole 2033 can be misaligned, thereby achieving fine control of airflow.

[0047] Combining the above solutions:

[0048] Furthermore:

[0049] like Figures 2 to 3 As shown;

[0050] To improve airflow mixing, in an optional embodiment, fine pores 2032 are uniformly distributed on one side of the inner tube 202 and the first reaction zone, and coarse pores 2031 are uniformly distributed on the side where the inner tube 202 and the second reaction zone are connected.

[0051] In this embodiment, fine pores 2032 are distributed on the same side of the first reaction zone, i.e., at the gas inlet port 5, which can enhance the initial diffusion of the gas and promote full contact between the gas and the catalyst. Meanwhile, coarse pores 2031 are distributed on the same side of the second reaction zone, i.e. at the gas outlet port 6, which can reduce flow pressure loss and prevent the accumulation of reaction products.

[0052] Combining the above solutions:

[0053] Furthermore:

[0054] like Figures 3 to 4 As shown;

[0055] To facilitate the engagement of the limiting block 907 and the limiting groove 904, in an optional embodiment, the limiting groove 904 is semi-circular in shape, the limiting block 907 is spherical in shape, and the sizes of the limiting groove 904 and the limiting block 907 are matched.

[0056] In this embodiment: when the inner tube 202 is rotated, the inner tube 202 drives the connecting rod 901 to rotate, and the connecting rod 901 in turn drives the long block 903 to rotate. When the long block 903 rotates, the limiting block 907 can be disengaged from the limiting groove 904. When the long block 903 rotates to be opposite to the next fixed block 902, the limiting block 907 can be re-engaged into the limiting groove 904, providing tactile feedback to the user.

[0057] Combining the above solutions:

[0058] Furthermore:

[0059] like Figures 3 to 4 As shown;

[0060] In order to observe the rotation position of the inner tube 202, in an optional embodiment, a scale 11 is provided on the top surface of the end cap 8, and the scale grooves on the surface of the scale 11 are spaced 120° apart.

[0061] In this embodiment: a scale 11 is provided on the top surface of the end cap 8, and the spacing between the scale grooves on the surface of the scale 11 is 120°. When the inner tube 202 is rotated, the position of the through groove can be adjusted according to the actual working conditions.

[0062] Combining the above solutions:

[0063] Furthermore:

[0064] like Figures 3 to 6 As shown;

[0065] In order to make the limiting block 907 fit into the limiting groove 904, in an optional embodiment, there are three sets of fixing blocks 902, and the positions of the three sets of fixing blocks 902 correspond to the scale grooves on the surface of the scale 11.

[0066] In this embodiment, the number of fixing blocks 902 is set to three groups, and the three groups of fixing blocks 902 correspond to the scale grooves on the surface of the scale 11 respectively. Under different working conditions, the limiting block 907 can be inserted into the limiting groove 904 to provide tactile feedback.

[0067] Combining the above solutions:

[0068] Furthermore:

[0069] like Figures 2 to 3 As shown;

[0070] To facilitate the rotation of the inner tube 202, in an optional embodiment, a rotating block 12 is mounted on the top surface of the elongated block 903.

[0071] In this embodiment, a rotating block 12 is installed at the top of the long block 903. When the inner tube 202 needs to be rotated, the inner tube 202 can be driven to rotate simply by rotating the rotating block 12, which improves the operating efficiency.

[0072] Working principle: When used under high flow rate conditions, rotating block 12 drives rotating block 903, which in turn drives moving block 907. The side of long block 903 presses against moving block 907, causing moving block 907 to retract spring 906 into groove 905 until moving block 907 out of groove 904. Then, due to its own elasticity, spring 906 causes moving block 907 to extend out of groove 905 again. Simultaneously, long block 903 drives connecting rod 901 to rotate, which in turn drives inner tube 202 to move outwards. The inner tube 201 rotates, and simultaneously the coarse holes 2031 and fine holes 2032 on the surface of the inner tube 202 and the auxiliary holes 2033 on the surface of the outer tube 201 are misaligned, so that the holes are completely misaligned. The gas flow can then flow only through the bottom connecting area. At this time, the limiting block 907 on the surface of the first set of fixing blocks 902 re-engages into the limiting groove 904. When used in the standard reaction mode, the rotating block 12 is continuously rotated so that the limiting block 907 on the surface of the second set of fixing blocks 902 and the limiting groove 904 on the side of the long block 903 engage, thus aligning half of the holes. When used under high catalytic demand, the rotating block 12 is continuously rotated again so that the limiting block 907 on the surface of the third set of fixing blocks 902 engages into the limiting groove 904, thus aligning all the holes. By rotating the inner tube 202, the relationship between the coarse holes 2031, fine holes 2032 and auxiliary holes 2033 can be adjusted, and the contact efficiency between the gas and the catalyst can be controlled.

[0073] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A high-efficiency methanol-to-hydrogen reactor, comprising an outer tube (1), an inner tube (2), and a heater (7), wherein the inner tube (2) is disposed inside the outer tube (1), the inner tube (2) and the outer tube (1) are connected by a partition (3), the inner diameter of the outer tube (1) is larger than the outer diameter of the inner tube (2) to form a jacket (4) for containing a catalyst, the partition (3) divides the jacket (4) into a first reaction zone and a second reaction zone, an inlet port (5) and an outlet port (6) are inserted into the top surface of the outer tube (1), the inlet port (5) is connected to the top of the first reaction zone, the outlet port (6) is connected to the top of the second reaction zone, and the heater (7) is installed on the outside of the outer tube (1), characterized in that: The inner tube (2) includes an outer tube (201) and an inner tube (202). The inner tube (202) is sleeved inside the outer tube (201). Both the outer tube (201) and the inner tube (202) have through holes (203) on their surfaces. The inner tube (202) is rotatably connected to the inside of the outer tube (1) through an end cap (8). The top surface of the end cap (8) is provided with a limit mechanism (9). The limiting mechanism (9) includes a connecting rod (901) and a fixing block (902). The connecting rod (901) is installed at the top of the inner tube (202), and the fixing block (902) is installed on the top surface of the end cap (8). A long block (903) is installed at the top of the connecting rod (901). A limiting groove (904) is opened on the side of the long block (903). A groove (905) is opened on the side of the fixing block (902). A spring (906) is installed inside the groove (905), and a limiting block (907) is installed at one end of the spring (906).

2. The methanol-to-hydrogen efficient reaction device according to claim 1, characterized in that: A temperature sensor (10) is installed on the top surface of the outer tube (1).

3. The high-efficiency methanol-to-hydrogen reactor according to claim 2, characterized in that: The through hole (203) includes a coarse hole (2031), a fine hole (2032), and an auxiliary hole (2033). The through hole (203) opened on the surface of the outer tube (201) is the auxiliary hole (2033), and the through hole (203) opened on the surface of the inner tube (202) is the coarse hole (2031) and the fine hole (2032), respectively.

4. The methanol-to-hydrogen efficient reaction device according to claim 3, characterized in that: The auxiliary holes (2033) are evenly distributed on the surface of the outer tube (201).

5. The methanol-to-hydrogen efficient reaction device according to claim 4, characterized in that: The fine pores (2032) are evenly distributed on one side of the inner tube (202) and the first reaction zone, and the coarse pores (2031) are evenly distributed on the side where the inner tube (202) and the second reaction zone are connected.

6. The methanol-to-hydrogen efficient reaction device according to claim 5, characterized in that: The limiting groove (904) is semi-circular in shape, and the limiting block (907) is spherical in shape. The sizes of the limiting groove (904) and the limiting block (907) are matched.

7. The methanol-to-hydrogen efficient reaction device according to claim 6, characterized in that: The top surface of the end cap (8) is provided with a scale (11), and the spacing between the scale grooves on the surface of the scale (11) is 120°.

8. The methanol-to-hydrogen efficient reaction device according to claim 7, characterized in that: There are three sets of fixing blocks (902), and the positions of the three sets of fixing blocks (902) correspond to the scale grooves on the surface of the scale (11).

9. The methanol-to-hydrogen efficient reaction device according to claim 8, characterized in that: A rotating block (12) is mounted on the top surface of the long block (903).

Images