Hydrogen deoxidation tower for preparing green ammonia

Abstract

The invention relates to the technical field of hydrogen production, and discloses a hydrogen deoxidation tower for green ammonia preparation, the hydrogen deoxidation tower comprises a deoxidation tower body and further comprises a heating inner cylinder fixedly mounted in the deoxidation tower body, and a cavity between the interior of the deoxidation tower body and the heating inner cylinder is filled with a catalyst; and a spiral heater is fixedly mounted in the heating inner cylinder. When the temperature in the deoxidation tower body exceeds the catalyst activity temperature range, the auxiliary heat preservation plate is driven to move up and down through clamping connection of the adjusting rod and the adjusting sliding groove, so that the heat preservation area of the auxiliary heat preservation plate on the deoxidation tower body is changed, heat in the deoxidation tower body can be dissipated, and the catalyst in the deoxidation tower body is cooled; the temperature in the deoxidation tower body is maintained within the catalyst activity temperature range, the probability that the catalyst is sintered or inactivated due to the fact that the temperature in the deoxidation tower body is too high is reduced, the probability that the catalytic reaction efficiency is reduced is reduced, and the overall catalytic reaction efficiency is kept stable.

Description

Technical Field

[0001] This application relates to the field of hydrogen production technology, and in particular to a hydrogen deoxygenation tower for the preparation of green ammonia. Background Technology

[0002] Green ammonia refers to ammonia synthesized from green hydrogen (hydrogen produced by electrolysis of water using renewable energy) and nitrogen through a carbon-free (or net-zero carbon emission) process. The core process of green ammonia preparation includes key steps such as green hydrogen preparation (hydrogen production by electrolysis of water), nitrogen separation (air separation system), and ammonia synthesis (Haber-Bosch process). Among these steps, during the production of hydrogen by electrolysis of water, dissolved oxygen in the hydrogen needs to be removed through a deoxygenation tower to ensure the stable operation of the electrolysis system.

[0003] When removing dissolved oxygen from hydrogen through a deoxygenation tower, a heating tube is installed inside the tower. The space between the inner wall of the tower and the outer surface of the heating tube is filled with catalyst. The deoxygenated hydrogen enters through the top of the heating tube, is heated to 150-200°C, and then flows out through the bottom of the heating tube, completing the deoxygenation process under the action of the catalyst. During this process, the catalyst inside the tower shell that is in contact with the outer surface of the heating tube becomes too hot after being heated for a long time. In addition, the catalytic deoxygenation reaction itself is an exothermic reaction. The combination of these two factors causes the temperature at this location to exceed the upper limit of the catalyst's activity temperature, which may lead to catalyst sintering (growth of active component particles) or deactivation. Meanwhile, the part of the catalyst near the inner wall of the shell and away from the outer surface of the heating tube has a slightly lower temperature, resulting in fluctuations in the overall catalytic reaction efficiency. Summary of the Invention

[0004] This application proposes a hydrogen deoxygenation tower for the preparation of green ammonia. It features a cooling function that maintains the catalyst inside the tower within its active temperature range, reducing the probability of catalyst sintering or deactivation due to excessively high temperatures. This avoids reduced catalytic reaction efficiency caused by overheating, ensuring the stability and efficiency of the entire catalytic reaction process. It also reduces the risk of efficiency fluctuations due to catalyst issues, minimizing the probability of efficiency reduction and maintaining stable overall catalytic reaction efficiency. This addresses the problem of catalyst sintering and deactivation affecting overall catalytic efficiency during the catalytic deoxygenation of hydrogen in a deoxygenation tower.

[0005] To achieve the above objectives, this application adopts the following technical solution: a hydrogen deoxygenation tower for green ammonia preparation, comprising a deoxygenation tower body and a heating inner cylinder fixedly installed inside the deoxygenation tower body, wherein the cavity between the interior of the deoxygenation tower body and the heating inner cylinder is filled with a catalyst, a spiral heater is fixedly installed inside the heating inner cylinder, and multiple sets of main heat pipes and secondary heat pipes are rotatably installed on the exterior of the heating inner cylinder for guiding the heat from the surface of the heating inner cylinder away from the catalyst, a stirring mechanism is provided inside the top of the deoxygenation tower body, and the stirring mechanism is drivenly connected to the main heat pipes and secondary heat pipes, and a fixed... Multiple main insulation plates are fixedly installed, and a secondary insulation plate is slidably connected to the top of the main insulation plate. An adjusting rod is slidably installed at the end of the secondary heat conduction pipe away from the heating inner cylinder. An adjusting groove adapted to the adjusting rod is opened on the inner side wall of the secondary insulation plate. During the hydrogen deoxygenation process, the stirring mechanism drives the main heat conduction pipe and the secondary heat conduction pipe to rotate to stir the catalyst, increase the contact area between the catalyst and hydrogen, and the secondary insulation plate moves up and down when the internal temperature of the deoxygenation tower body is too high due to the engagement between the adjusting rod and the adjusting groove, so as to dissipate heat from the deoxygenation tower body and keep the internal temperature of the deoxygenation tower body within the catalyst activity temperature range.

[0006] During the process of the main heat pipe and the secondary heat pipe directing the heat from the surface of the inner cylinder away from the catalyst, the stirring mechanism drives the main heat pipe and the secondary heat pipe to rotate to stir the catalyst. When the internal temperature of the deoxidation tower body is too high due to the engagement between the adjusting rod and the adjusting slide, the secondary insulation plate moves up and down to dissipate heat from the deoxidation tower body, so that the internal temperature of the deoxidation tower body is maintained within the catalyst activity temperature range.

[0007] Furthermore, an iron block is fixedly installed inside the end of the adjusting rod away from the secondary heat-conducting pipe, and an electromagnet is fixedly installed in the inner wall of the adjusting groove, and the electromagnet is electrically connected to the controller.

[0008] Furthermore, sensor group I is fixedly installed on the outer side of the bottom end of the heating inner cylinder, and sensor group II is fixedly installed in the inner wall of the main insulation plate. Both sensor group I and sensor group II are electrically connected to the controller for monitoring the catalyst temperature inside the deoxidation tower body.

[0009] Furthermore, the stirring mechanism includes a toothed ring that is slidably fitted on the outside of the heating inner cylinder. Multiple heat-conducting rods are fixedly installed at the bottom of the toothed ring. The heat-conducting rods are arc-shaped and fit against the outer surface of the heating inner cylinder. The side of the heat-conducting rod away from the heating inner cylinder is fixedly connected to the main heat pipe and the secondary heat-conducting pipe.

[0010] Furthermore, the stirring mechanism also includes a motor fixedly installed on the top of the deoxygenation tower body. The output end of the motor movably penetrates the top wall of the deoxygenation tower body and is fixedly installed with a rotating shaft. The bottom end of the rotating shaft is fixedly installed with a gear that meshes with a gear ring for transmission.

[0011] Furthermore, two connecting rods are symmetrically fixedly installed on the outer side of the bottom end of the telescopic toothed ring. A ball is rotatably installed on the end of the connecting rod away from the toothed ring. A guide ring is fixedly installed on the inner side wall of the top of the deoxygenation tower body. A guide groove is opened on the inner side wall of the guide ring and is slidably connected to the ball. The guide groove is wavy in a centrally symmetrical manner in the vertical direction. The connecting rod and the ball are guided to move up and down while rotating through the guide groove.

[0012] Furthermore, in the vertical direction, the height of the gear ring is greater than the height of the gear, and the height of the gear ring is the same as the height of the guide ring, so as to ensure that the gear ring will not separate from the shaft when it rotates and moves up and down.

[0013] Furthermore, a limiting groove is provided at one end of the adjusting rod near the secondary heat-conducting pipe, which is slidably connected to the secondary heat-conducting pipe. A spring is fixedly installed between the side wall of the secondary heat-conducting pipe and the inner side wall of the limiting groove to assist in the reset of the adjusting rod.

[0014] Furthermore, the top of the main insulation board is provided with a mounting groove that is slidably connected to the secondary insulation board. An elastic element is fixedly installed between the bottom wall of the secondary insulation board and the inner bottom wall of the mounting groove to assist in the repositioning of the secondary insulation board.

[0015] Furthermore, the top of the heating inner cylinder is fixedly connected to the top wall of the deoxygenation tower body and is fixedly connected to an inlet pipe. A flow equalization ring is fixedly installed at the bottom of the heating inner cylinder, and the bottom of the flow equalization ring is fixedly connected to the inner side wall of the deoxygenation tower body. An outlet pipe is fixedly connected to the top of the deoxygenation tower body. Hydrogen enters the interior of the heating inner cylinder through the inlet pipe, and after being heated, it moves out through the flow equalization ring to react with the catalyst inside the deoxygenation tower body. The hydrogen after the reaction flows out through the outlet pipe.

[0016] The beneficial effects of this invention are as follows:

[0017] This application provides a hydrogen deoxygenation tower for the preparation of green ammonia. During the hydrogen deoxygenation process, by adjusting the engagement or disengagement of the regulating rod and the regulating slide, when the internal temperature of the deoxygenation tower exceeds the catalyst's active temperature range, the auxiliary heat-conducting pipe and the regulating rod drive the auxiliary insulation plate to move up and down, thereby changing the insulation area of ​​the auxiliary insulation plate on the deoxygenation tower body. This allows the heat inside the deoxygenation tower body to dissipate, cooling the catalyst inside the deoxygenation tower body and maintaining the internal temperature of the deoxygenation tower body within the catalyst's active temperature range. This reduces the probability of catalyst sintering or deactivation due to excessively high temperatures, avoids the phenomenon of reduced catalytic reaction efficiency caused by excessively high temperatures, ensures the stability and high efficiency of the entire catalytic reaction process, and reduces the risk of fluctuations in reaction efficiency due to catalyst problems, minimizing the probability of reduced catalytic reaction efficiency and maintaining overall catalytic reaction efficiency stability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the front cross-sectional structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the main cross-sectional structure of the deoxygenation tower body, main insulation plate and guide ring of the present invention.

[0022] Figure 4 This is a schematic diagram of the toothed ring, heat-conducting rod, and main heat pipe of the present invention.

[0023] Figure 5 This is a schematic diagram of the main cross-sectional structure of the auxiliary heat pipe and adjusting rod of the present invention.

[0024] In the diagram: 1. Deoxygenation tower body; 2. Heating inner cylinder; 3. Main heat pipe; 4. Secondary heat pipe; 5. Main insulation plate; 6. Secondary insulation plate; 601. Installation groove; 7. Adjusting rod; 8. Adjusting slide groove; 9. Limiting slide groove; 10. Spring; 11. Gear ring; 12. Heat-conducting rod; 13. Connecting rod; 14. Ball; 15. Guide ring; 16. Guide slide groove; 17. Motor; 18. Rotating shaft; 19. Gear; 20. Inlet pipe; 21. Flow equalization ring; 22. Outlet pipe. Detailed Implementation

[0025] 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.

[0026] See Figures 1 to 5 A hydrogen deoxygenation tower for green ammonia preparation includes a deoxygenation tower body 1, with an outlet pipe 22 fixedly connected to the top of the deoxygenation tower body 1. A heating inner cylinder 2 is fixedly installed inside the deoxygenation tower body 1, and the cavity between the interior of the deoxygenation tower body 1 and the heating inner cylinder 2 is filled with a catalyst. A spiral heater is fixedly installed inside the heating inner cylinder 2, and a flow equalization ring 21 is fixedly installed at the bottom of the heating inner cylinder 2, with the bottom of the flow equalization ring 21 fixedly connected to the inner wall of the deoxygenation tower body 1. The top of the heating inner cylinder 2 is fixedly connected to the top wall of the deoxygenation tower body 1 through an inlet pipe 20. During hydrogen purification, the hydrogen to be deoxygenated enters the interior of the heating inner cylinder 2 through the inlet pipe 20, is heated by the spiral heater inside the heating inner cylinder 2, and then flows out through the flow equalization ring 21. The heated hydrogen flows upward and reacts with the catalyst. The deoxygenated hydrogen after the catalyst reaction flows out through the outlet pipe 22.

[0027] A motor 17 is fixedly installed on the top of the deoxygenation tower body 1. The output end of the motor 17 movably passes through the top wall of the deoxygenation tower body 1 and is fixedly installed with a rotating shaft 18. A gear 19 is fixedly installed at the bottom end of the rotating shaft 18. A gear ring 11 that meshes with the gear 19 is slidably fitted on the outer side of the top of the heating inner cylinder 2. Multiple heat-conducting rods 12 are fixedly installed on the top of the gear ring 11, and the multiple heat-conducting rods 12 are arranged in a ring array. The heat-conducting rods 12 are arc-shaped and fit against the outer surface of the heating inner cylinder 2. Multiple main heat pipes 3 and secondary heat-conducting pipes 4 are fixedly installed on the side of the heat-conducting rods 12 away from the heating inner cylinder 2. The main heat pipes 3 and secondary heat-conducting pipes 4 are made of copper-graphite composite material, which, while ensuring high thermal conductivity, also enhances wear resistance and self-lubrication through graphite, avoiding wear on catalyst particles. During the reaction with the catalyst, the heat from the outer surface of the inner cylinder 2 is conducted to the catalyst near the inner wall of the deoxygenation tower body 1 through the heat-conducting rod 12, the main heat pipe 3, and the secondary heat-conducting pipe 4. This reduces the temperature difference between the catalyst near the outer surface of the inner cylinder 2 and near the inner wall of the deoxygenation tower body 1, thus reducing the probability that the hydrogen deoxygenation effect will be affected due to uneven heating of the catalyst. At the same time, the output end of the motor 17 drives the rotating shaft 18 and the gear 19 to rotate. The gear 19 then drives the gear ring 11 to rotate through meshing transmission. When the gear ring 11 rotates, it drives the main heat pipe 3 and the secondary heat-conducting pipe 4 to rotate through the heat-conducting rod 12 to stir the catalyst, reducing the probability of sintering due to long-term accumulation of heated catalyst, increasing the contact area between the catalyst and hydrogen, and improving the catalytic efficiency.

[0028] Two connecting rods 13 are symmetrically fixedly installed on the outer side of the bottom end of the gear ring 11. A ball bearing 14 is rotatably installed on the end of the connecting rod 13 away from the gear ring 11. A guide ring 15 is fixedly installed on the inner side wall of the top of the deoxygenation tower body 1. A guide groove 16 is opened on the inner side wall of the guide ring 15, which is slidably connected to the ball bearing 14. The guide groove 16 is wavy in a centrally symmetrical arrangement in the vertical direction. In the vertical direction, the height of the gear ring 11 is greater than the height of the gear 19. When the gear ring 11 rotates under the meshing transmission of the gear 19, the ball bearing 14 is also inside the guide groove 16. The sliding, wave-shaped guide groove 16 allows the connecting rod 13 and the ball 14 to move up and down while rotating with the gear ring 11. This, in turn, drives the heat-conducting rod 12, the main heat pipe 3, and the secondary heat-conducting pipe 4 to move up and down together. This allows the main heat pipe 3 and the secondary heat-conducting pipe 4 to rotate and stir the catalyst while also flipping up and down, enhancing the stirring effect of the main heat pipe 3 and the secondary heat-conducting pipe 4 on the catalyst and further reducing the probability of catalyst accumulation.

[0029] Multiple main insulation plates 5 are fixedly installed on the inner wall of the deoxygenation tower body 1, and the multiple main insulation plates 5 are arranged in an array in the vertical direction. The top of the main insulation plate 5 is provided with a mounting groove 601, and a secondary insulation plate 6 is slidably installed inside the mounting groove 601. An adjusting groove 8 is provided on the inner wall of the secondary insulation plate 6, and the outer wall of the secondary insulation plate 6 is in contact with the inner wall of the deoxygenation tower body 1. An adjusting rod 7 adapted to the adjusting groove 8 is slidably installed at the end of the secondary heat conduction pipe 4 away from the heat conduction rod 12. An iron block is fixedly installed inside the end of the adjusting rod 7 away from the auxiliary heat pipe 4. An electromagnet is fixedly installed in the inner wall of the adjusting groove 8. Sensor group I is fixedly installed on the outer side of the bottom end of the heating inner cylinder 2. Sensor group II is fixedly installed in the inner wall of the main insulation plate 5. The catalyst temperature inside the deoxidation tower body 1 away from the outer surface of the heating inner cylinder 2 is monitored by sensor group II to ensure that the catalyst temperature at all parts inside the deoxidation tower body 1 can be maintained within the reaction activity temperature range (150~200℃).

[0030] Both sensor groups I and II are arranged in a ring array and are electrically connected to the controller. During hydrogen deoxygenation, sensor group I monitors the surface temperature of the heating inner cylinder 2. Since the spiral heater inside the heating inner cylinder 2 heats the hydrogen at a constant temperature, and under the thermal conductivity of the main heat pipe 3 and the secondary heat pipe 4, the catalyst inside the deoxygenation tower body 1 near the main insulation plate 5 and the secondary insulation plate 6 can also be kept within the catalyst activity temperature range. Therefore, the temperature data monitored by sensor groups I and II are relatively accurate. The temperature remains stable without significant fluctuations. When sensor group I detects a temperature exceeding the catalyst's active temperature (greater than 200℃), it will affect the catalytic reaction efficiency. In this case, the spiral heater needs to be inspected to determine if it is operating normally. If the spiral heater is operating normally, but the temperatures monitored by sensor groups I and II are high, it indicates that the catalyst temperature inside the deoxidation tower body 1 is too high due to the combined effects of the spiral heater's heating and the exothermic catalytic reaction, exceeding the catalyst's active temperature range and affecting catalytic efficiency. At this point, sensor group I will transmit the temperature signal to the control... The controller outputs a control signal to energize the electromagnet, which generates magnetism. When the rotating secondary heat pipe 4 and adjusting rod 7 gradually approach the adjusting groove 8 in the vertical direction, under the action of the electromagnet's magnetism, the iron block drives the adjusting rod 7 to slide away from the secondary heat pipe 4 until the end of the adjusting rod 7 away from the secondary heat pipe 4 slides into the interior of the adjusting groove 8. This achieves the purpose of the secondary heat pipe 4 moving up and down through the engagement between the adjusting rod 7 and the adjusting groove 8, causing the secondary insulation plate 6 to move up and down. When the secondary insulation plate 6 moves up and down, it partially overlaps with the main insulation plate 5, thereby reducing the impact of the secondary insulation plate 6 on the deoxidation tower. The insulation area of ​​the body 1 is reduced, which reduces its insulation effect on the deoxidation tower body 1, allowing the heat inside the deoxidation tower body 1 to dissipate and cool down the deoxidation tower body 1, thereby lowering the temperature of the catalyst inside the deoxidation tower body 1 and keeping the temperature of the catalyst inside the deoxidation tower body 1 within the catalyst activity temperature range. During the heat dissipation process, when the sensor group II detects that the temperature is lower than the catalyst activity temperature (less than 150℃), the sensor group II transmits the temperature signal to the controller. The controller outputs a control signal to de-energize the electromagnet, so that the electromagnet no longer attracts the iron block inside the regulating rod 7.

[0031] The end of the adjusting rod 7 near the secondary heat conduction pipe 4 is provided with a limiting groove 9 that is slidably connected to the secondary heat conduction pipe 4. A spring 10 is fixedly installed between the side wall of the secondary heat conduction pipe 4 and the inner side wall of the limiting groove 9. When the electromagnet is de-energized, the iron block inside the adjusting rod 7 is no longer attracted by the electromagnet. Under the action of the spring force of the spring 10, the adjusting rod 7 gradually slides back to the direction of the secondary heat conduction pipe 4 to release the locking between the adjusting rod 7 and the adjusting groove 8. This prevents the adjusting rod 7 from driving the secondary insulation plate 6 up and down through the adjusting groove 8. An elastic element is fixedly installed between the bottom wall of the secondary insulation plate 6 and the inner bottom wall of the placement groove 601. When the locking between the adjusting rod 7 and the adjusting groove 8 is released, the secondary insulation plate 6 also gradually resets under the action of the elastic element to continue to insulate the deoxygenation tower body 1.

[0032] Working principle:

[0033] During hydrogen purification, the hydrogen to be deoxygenated enters the interior of the heating inner cylinder 2 through the inlet pipe 20. It is heated by a spiral heater inside the heating inner cylinder 2 and then flows out through the equalization ring 21. The heated hydrogen flows upward and reacts with the catalyst. During the reaction, the heat from the outer surface of the heating inner cylinder 2 is conducted to the catalyst near the inner wall of the deoxygenation tower body 1 through the heat-conducting rod 12, the main heat pipe 3, and the secondary heat-conducting pipe 4. This reduces the temperature difference between the catalyst near the outer surface of the heating inner cylinder 2 and near the inner wall of the deoxygenation tower body 1, resulting in a more stable overall catalytic efficiency. The output of the motor 17 drives the rotating shaft 18 and gear 19 to rotate. The gear 19 then drives the gear ring through meshing transmission. When the gear ring 11 rotates, it drives the main heat pipes 3 and secondary heat pipes 4 to rotate through the heat-conducting rod 12 to stir the catalyst. When the gear ring 11 rotates, the rolling ball 14 is guided by the wave-shaped guide groove 16, so that the connecting rod 13 and the rolling ball 14 move up and down while rotating with the gear ring 11. Then, the gear ring 11 drives the heat-conducting rod 12, the main heat pipes 3 and the secondary heat pipes 4 to move up and down together, so that the main heat pipes 3 and the secondary heat pipes 4 can rotate and stir the catalyst while also flipping up and down, which enhances the stirring effect of the main heat pipes 3 and the secondary heat pipes 4 on the catalyst and further reduces the probability of catalyst accumulation. Finally, the hydrogen gas after deoxygenation by the catalyst reaction flows out through the gas outlet pipe 22.

[0034] During the reaction of hydrogen with the catalyst, when sensor group I detects that the temperature exceeds the catalyst's active temperature (greater than 200℃), sensor group I transmits the temperature signal to the controller. The controller outputs a control signal to energize the electromagnet. The energized electromagnet generates magnetism. As the rotating secondary heat pipe 4 and adjusting rod 7 gradually approach the adjusting groove 8 in the vertical direction, under the action of the electromagnet's magnetism, the iron block drives the adjusting rod 7 to slide away from the secondary heat pipe 4 until the end of the adjusting rod 7 away from the secondary heat pipe 4 slides into the interior of the adjusting groove 8. This achieves the purpose of the secondary heat pipe 4 moving up and down through the engagement of the adjusting rod 7 and the adjusting groove 8, causing the secondary insulation plate 6 to move up and down. When the secondary insulation plate 6 moves up and down, it partially overlaps with the main insulation plate 5, thereby reducing the insulation area of ​​the secondary insulation plate 6 on the deoxygenation tower body 1 and reducing its insulation effect on the deoxygenation tower body 1. This allows the heat inside the deoxygenation tower body 1 to dissipate, thus reducing the heat loss and lowering the temperature. The temperature of the catalyst inside the deoxidation tower body 1 is maintained within the catalyst's active temperature range. Simultaneously, the spiral heater needs to be inspected to identify the cause of the excessive temperature. If the spiral heater is operating normally, the excessive temperature inside the deoxidation tower body 1 is likely due to the combined effect of the spiral heater's heating action and the exothermic catalytic reaction. As the deoxidation tower body 1 dissipates heat, when sensor group II detects a temperature below the catalyst's active temperature (below 150℃), sensor group II transmits the temperature signal to the controller. The controller outputs a control signal to de-energize the electromagnet, preventing it from attracting the iron block inside the adjusting rod 7. Under the force of spring 10, the adjusting rod 7 gradually slides back towards the secondary heat pipe 4 to release the engagement between the adjusting rod 7 and the adjusting groove 8. The secondary insulation plate 6 also gradually resets under the action of the elastic element to continue insulating the deoxidation tower body 1.

[0035] By adjusting the engagement or disengagement of the adjusting rod 7 and the adjusting slide 8, when the internal temperature of the deoxidation tower body 1 exceeds the catalyst's active temperature range, the auxiliary heat-conducting pipe 4 and the adjusting rod 7 drive the auxiliary insulation plate 6 to move up and down, thereby changing the insulation area of ​​the auxiliary insulation plate 6 on the deoxidation tower body 1. This allows the heat inside the deoxidation tower body 1 to dissipate, cooling the catalyst inside the deoxidation tower body 1 and maintaining the internal temperature of the deoxidation tower body 1 within the catalyst's active temperature range. This reduces the probability of catalyst sintering or deactivation due to excessively high temperatures inside the deoxidation tower body 1, decreases the probability of reduced catalytic reaction efficiency, and keeps the overall catalytic reaction efficiency stable.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hydrogen deoxygenation tower for green ammonia preparation, comprising a deoxygenation tower body (1), characterized in that, It also includes a heating inner cylinder (2) fixedly installed inside the deoxygenation tower body (1), and the cavity between the inside of the deoxygenation tower body (1) and the heating inner cylinder (2) is filled with a catalyst. A spiral heater is fixedly installed inside the heating inner cylinder (2). Multiple sets of main heat pipes (3) and auxiliary heat pipes (4) are rotatably installed on the outside of the heating inner cylinder (2) to guide the heat on the surface of the heating inner cylinder (2) away from the catalyst. A stirring mechanism is provided inside the top of the deoxygenation tower body (1), and the stirring mechanism is connected to the main heat pipes (3) and auxiliary heat pipes (4) in a transmission connection. Multiple main insulation plates (5) are fixedly installed on the inner side wall of the deoxygenation tower body (1). The top of the main insulation plate (5) A secondary insulation plate (6) is connected to the secondary heat pipe (4) in a limiting sliding connection. An adjusting rod (7) is installed at the end of the secondary heat pipe (4) away from the heating inner cylinder (2). An adjusting groove (8) adapted to the adjusting rod (7) is opened on the inner side wall of the secondary insulation plate (6). During the hydrogen deoxygenation process, the stirring mechanism drives the main heat pipe (3) and the secondary heat pipe (4) to rotate to stir the catalyst, increase the contact area between the catalyst and hydrogen, and drive the secondary insulation plate (6) to move up and down when the internal temperature of the deoxygenation tower body (1) is too high through the engagement between the adjusting rod (7) and the adjusting groove (8) to dissipate heat from the deoxygenation tower body (1) so that the internal temperature of the deoxygenation tower body (1) is maintained within the catalyst activity temperature range.

2. The hydrogen deoxygenation tower for green ammonia preparation according to claim 1, characterized in that, An iron block is fixedly installed inside the end of the adjusting rod (7) away from the secondary heat pipe (4), and an electromagnet is fixedly installed in the inner wall of the adjusting groove (8), and the electromagnet is electrically connected to the controller.

3. The hydrogen deoxygenation tower for green ammonia preparation according to claim 2, characterized in that, Sensor group I is fixedly installed on the outer side of the bottom end of the heating inner cylinder (2), and sensor group II is fixedly installed in the inner wall of the main insulation plate (5). Both sensor group I and sensor group II are electrically connected to the controller and are used to monitor the temperature of the catalyst inside the deoxygenation tower body (1).

4. The hydrogen deoxygenation tower for green ammonia preparation according to claim 3, characterized in that, The stirring mechanism includes a toothed ring (11) that slides on the outside of the heating inner cylinder (2). Multiple heat-conducting rods (12) are fixedly installed at the bottom of the toothed ring (11). The heat-conducting rods (12) are arc-shaped and fit against the outer surface of the heating inner cylinder (2). The side of the heat-conducting rod (12) away from the heating inner cylinder (2) is fixedly connected to the main heat pipe (3) and the secondary heat-conducting pipe (4).

5. The hydrogen deoxygenation tower for green ammonia preparation according to claim 4, characterized in that, The stirring mechanism also includes a motor (17) fixedly installed on the top of the deoxygenation tower body (1). The output end of the motor (17) moves through the top wall of the deoxygenation tower body (1) and is fixedly installed with a rotating shaft (18). The bottom end of the rotating shaft (18) is fixedly installed with a gear (19) that meshes with the gear ring (11).

6. The hydrogen deoxygenation tower for green ammonia preparation according to claim 5, characterized in that, Two connecting rods (13) are symmetrically fixedly installed on the outer side of the bottom end of the telescopic toothed ring (11). A ball (14) is rotatably installed on the end of the connecting rod (13) away from the toothed ring (11). A guide ring (15) is fixedly installed on the inner side wall of the top of the deoxygenation tower body (1). A guide groove (16) is opened on the inner side wall of the guide ring (15) and is slidably connected to the ball (14). The guide groove (16) is wavy in a centrally symmetrical manner in the vertical direction. The connecting rod (13) and the ball (14) are guided to rotate and move up and down through the guide groove (16).

7. A hydrogen deoxygenation tower for green ammonia preparation according to claim 6, characterized in that, In the vertical direction, the height of the gear ring (11) is greater than the height of the gear (19), and the height of the gear ring (11) is the same as the height of the guide ring (15) to ensure that the gear ring (11) will not separate from the rotating shaft (18) when it rotates and moves up and down.

8. A hydrogen deoxygenation tower for green ammonia preparation according to claim 7, characterized in that, The adjusting rod (7) has a limiting groove (9) at one end near the secondary heat pipe (4) that is slidably connected to the secondary heat pipe (4). A spring (10) is fixedly installed between the side wall of the secondary heat pipe (4) and the inner side wall of the limiting groove (9) to assist the adjusting rod (7) in resetting.

9. A hydrogen deoxygenation tower for green ammonia preparation according to claim 8, characterized in that, The top of the main insulation board (5) is provided with a mounting groove (601) that is slidably connected to the secondary insulation board (6). An elastic element is fixedly installed between the bottom wall of the secondary insulation board (6) and the inner bottom wall of the mounting groove (601) to assist the repositioning of the secondary insulation board (6).

10. A hydrogen deoxygenation tower for green ammonia preparation according to claim 1, characterized in that, The top of the heating inner cylinder (2) is fixedly connected to the top wall of the deoxygenation tower body (1) and is fixedly connected to the inlet pipe (20). The bottom of the heating inner cylinder (2) is fixedly installed with a flow equalization ring (21), and the bottom of the flow equalization ring (21) is fixedly connected to the inner wall of the deoxygenation tower body (1). The top of the deoxygenation tower body (1) is fixedly connected to the outlet pipe (22). Hydrogen enters the interior of the heating inner cylinder (2) through the inlet pipe (20), and after being heated, it moves out through the flow equalization ring (21) to react with the catalyst inside the deoxygenation tower body (1). The hydrogen after the reaction flows out through the outlet pipe (22).

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