Catalyst adding device and method for coupling carbon dioxide and ethane

Abstract

The invention discloses a catalyst adding device and method for carbon dioxide and ethane coupling in the technical field of catalyst adding devices.In the coupling reaction process of carbon dioxide and ethane, a laminate, an adding pipe and a discharging pipe are utilized, and in the reaction process of the carbon dioxide and the ethane, the carbon dioxide and the ethane can be added into the catalyst adding device. The deactivated catalyst can be automatically discharged and added, the replacement speed is high, the manual workload is reduced, the reaction in the reaction tower does not need to be stopped, the situation that the reaction needs to be stopped and the reaction tower is opened when the catalyst is replaced, the replacement time is long, and the reaction process of carbon dioxide and ethane is affected is avoided; in the process of discharging the catalyst by utilizing a scraping frame, the catalyst quickly rolls into a discharging pipe, so that the catalyst is prevented from being accumulated in a storage cavity, and in the process of adding the catalyst, the scraping frame moves to scrape the catalyst in the storage cavity, so that uniform distribution of the catalyst is facilitated; and the subsequent full contact of carbon dioxide with ethane and the catalyst is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of catalyst adding devices, and in particular to a catalyst adding device and method for carbon dioxide ethane coupling. Background Art

[0002] The reaction of CO2 with ethane is an important means to achieve carbon emission reduction targets and utilize unconventional energy, which is in line with major national needs and international academic frontiers. Among them, carbon dioxide promotes the activation of ethane through the "active oxygen" mechanism, "lattice oxygen" mechanism and "reaction coupling" mechanism. By selectively breaking the C-H / C-C bond through catalyst design, the reaction can be carried out in a directionally controlled manner along two pathways: ethane dry reforming reaction (DRE) and ethane oxidative dehydrogenation (ODH).

[0003] In the prior art, during the coupling reaction of carbon dioxide and ethane, a catalyst needs to be added to the carbon dioxide and ethane in the reaction process to carry out the catalytic reaction. However, during the coupling reaction of carbon dioxide and ethane, the catalyst gradually loses its activity due to various reasons. The reduced activity of the catalyst during the reaction will lead to a reduced reaction rate of carbon dioxide and ethane. Due to the limitations of the reactants and the reaction apparatus, it is difficult to replace the catalyst during the reaction. During the long-term reaction of carbon dioxide and ethane, the reaction rate will gradually decrease, affecting the reaction progress. Summary of the Invention

[0004] The object of the present invention is to provide a catalyst adding device and method for carbon dioxide ethane coupling to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a catalyst adding device for carbon dioxide ethane coupling, comprising a support frame, a reaction tower installed in the support frame, an air inlet pipe connected to the bottom of the reaction tower, an exhaust pipe connected to the upper surface of the reaction tower, a plurality of storage mechanisms provided inside the reaction tower, the storage mechanisms being used to store the catalysts used in the reaction process, a plurality of replacement mechanisms provided on the surface of the reaction tower corresponding to the positions of the plurality of storage mechanisms, the replacement mechanisms being used to replace the deactivated catalysts during the reaction process, a driving mechanism provided inside the reaction tower, the driving mechanism being used to act on the storage mechanism to dock the storage mechanism with the replacement mechanism to discharge and add the catalyst inside, a scraping mechanism provided inside the storage mechanism, the scraping mechanism being used to scrape the catalyst during the process of discharging the catalyst.

[0006] As a further solution of the present invention, the storage mechanism includes two semicircular layer plates, which are combined and arranged inside the reaction tower. A storage cavity is provided inside the layer plates, and a plurality of air holes are provided on the surface of the layer plates. An addition port is provided on the side of the two layer plates away from each other, and a blocking plate is elastically and slidably connected to the addition port, and the side of the blocking plate away from the addition port is an arc-shaped protrusion.

[0007] As a further solution of the present invention, the replacement mechanism includes an addition pipe and a discharge pipe, and the addition pipe and the discharge pipe are both connected to the surface of the reaction tower. The addition pipe and the discharge pipe are located on the side of the layer plate close to the addition port, and the addition pipe is located above the discharge pipe. The addition pipe and the discharge pipe are both inclined, and the inner wall of the addition pipe and the discharge pipe close to the layer plate is shorter than the inner wall away from the layer plate.

[0008] As a further solution of the present invention, the driving mechanism includes two rotating shafts, which are respectively fixedly connected to the inside of the two layer plates, and the two rotating shafts are rotatably connected to the inner wall surface of the reaction tower after passing through the two layer plates. The two layers are fixedly connected to the inner wall surface of the reaction tower with a retractable connecting plate on one side close to each other. Two driving cylinders are fixedly connected to the inner wall surface of the reaction tower, and the driving cylinders are electrically connected to an external controller. The telescopic ends of the two driving cylinders are commonly fixedly connected to a push rod, and the two connecting plates are hinged to the surface of the push rod.

[0009] As a further solution of the present invention, the scraping mechanism includes a sliding frame, which is elastically slidably connected to the bottom of the inner wall of the storage cavity, and the sliding frame extends to the position of the baffle plate. The sliding frame is fixedly connected to a scraping frame on the side away from the baffle plate, and the scraping frame is in contact with the bottom of the inner wall of the storage cavity. The front and rear side walls of the adding pipe and the discharging pipe are both provided with wavy guide blocks close to the sliding frame.

[0010] As a further solution of the present invention, a flip plate is elastically hinged on the inner wall surface of the air vent, air holes are opened on the surface of the flip plate, and a knocking block is fixedly connected to the surface of the flip plate.

[0011] As a further solution of the present invention, the ends of the addition pipe and the discharge pipe are elastically and slidably connected with L-shaped sealing plates, which seal the ends of the addition pipe and the discharge pipe. When the layer plate rotates, the sealing plate is moved.

[0012] As a further solution of the present invention, a plurality of material blocking grooves are provided at the bottom of the inner wall of the storage cavity. The side of the material blocking groove away from the addition port is arc-shaped, and the side of the material blocking groove close to the addition port is inclined.

[0013] As a further solution of the present invention, the edges of the layer plates and the blocking plates are both arc-shaped, and a soft sealing ring is fixedly connected to the inner wall surface of the reaction tower.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention utilizes a layer plate, an addition tube, and a discharge tube during the coupling reaction of carbon dioxide and ethane, which is beneficial for automatically discharging and adding the deactivated catalyst during the reaction of carbon dioxide and ethane. The replacement speed is fast, which reduces the manual workload, and there is no need to stop the reaction inside the reaction tower, thus avoiding the need to terminate the reaction and open the reaction tower when replacing the catalyst, which takes a long time to replace and affects the reaction process of carbon dioxide and ethane. In addition, a scraper is utilized to quickly roll the catalyst into the discharge tube during the process of discharging the catalyst, thus avoiding the catalyst from accumulating inside the storage chamber and being unable to roll into the discharge tube, thereby affecting the subsequent addition of the catalyst. During the process of adding the catalyst, the scraper moves to scrape the catalyst inside the storage chamber, which is beneficial for the uniform arrangement of the catalyst and facilitates the subsequent full contact of carbon dioxide with ethane and the catalyst.

[0016] The present invention discharges the catalyst inside the storage chamber, and the blocking plate will move to the discharge pipe position under the flipping action of the layer plate, and the addition port is connected to the discharge pipe. In the process of gradually discharging the catalyst inside the storage chamber, the reaction inside the reaction tower continues, and the gas will still pass through the layer plate through the air vents and the vents. When the catalyst on the surface of the flip plate gradually decreases, the airflow will cause the flip plate to rotate, and the rotation of the flip plate will push the catalyst on the surface toward the side close to the discharge pipe, which is beneficial in the process of discharging the catalyst inside the storage chamber. The flip plate can push the catalyst toward the side close to the discharge pipe, so that the catalyst can be quickly discharged from the storage chamber, and can avoid the catalyst from accumulating at the air vent position and being difficult to discharge. The deactivated catalyst will hinder the circulation of carbon dioxide and ethane, and carbon dioxide and ethane gases are difficult to contact with new catalysts, thereby reducing the reaction rate. After the flip plate pushes the surface catalyst to one side, the flip plate will swing back and forth under the action of carbon dioxide and ethane gases, and the knocking block will swing back and forth and knock the inner wall of the storage chamber, which can cause the layer plate to vibrate to a certain extent, which is beneficial for the catalyst inside the storage chamber to be quickly moved out of the storage chamber.

[0017] 3. In the process of flipping the layer plate to discharge the catalyst of the present invention, when the layer plate is flipped to the position of the discharge pipe, the blocking plate will be blocked by the inner wall above the discharge pipe, the layer plate will push the sealing plate downward, and the addition port will be connected with the discharge pipe to discharge the catalyst. Subsequently, in the process of the layer plate returning to its original position, the sealing plate will re-seal the addition pipe to prevent carbon dioxide and ethane gas from escaping through the discharge pipe. When the layer plate is flipped upward to add the catalyst, the layer plate will push the sealing plate upward along the addition pipe, and then the addition port will be connected with the addition pipe to add the catalyst. After the catalyst is added, in the process of the layer plate returning to its original position, the sealing plate will re-seal the addition pipe to prevent excess catalyst inside the addition pipe from falling onto the top of the layer plate, making it difficult to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Flow chart of the method of the present invention;

[0019] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the overall structure of the present invention after being cut apart;

[0021] Figure 4 It is a schematic structural diagram of the reaction tower after being cut open in the present invention;

[0022] Figure 5 for Figure 4 Schematic diagram of the structure at A in the middle;

[0023] Figure 6 It is a structural diagram of the connection relationship between two layers in the present invention;

[0024] Figure 7 for Figure 6 Schematic diagram of the structure at B in the middle;

[0025] Figure 8 This is a schematic diagram of the structure of the middle layer plate of the present invention after being cut open;

[0026] Figure 9 for Figure 8 Schematic diagram of the structure at C in the middle;

[0027] Figure 10 This is a structural diagram showing the positional relationship between the middle plate, the sliding frame and the blocking plate of the present invention;

[0028] Figure 11 It is a structural diagram of the sliding frame and the scraping frame in the present invention.

[0029] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0030] Support frame 1, reaction tower 2, air inlet pipe 3, exhaust pipe 4, layer plate 5, storage chamber 6, air vent 7, adding port 8, blocking plate 9, adding pipe 10, discharge pipe 11, rotating shaft 12, connecting plate 13, driving cylinder 14, pushing rod 15, sliding frame 16, scraping frame 17, guide block 18, flip plate 19, air vent 20, knocking block 21, sealing plate 22, material blocking groove 23, sealing ring 24. DETAILED DESCRIPTION

[0031] 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] See also Figures 1-11 The present invention provides a technical solution: a catalyst adding device for carbon dioxide ethane coupling, comprising a support frame 1, a reaction tower 2 is installed in the support frame 1, an air inlet pipe 3 is connected to the bottom of the reaction tower 2, and an exhaust pipe 4 is connected to the upper end surface of the reaction tower 2. A plurality of storage mechanisms are provided inside the reaction tower 2, and the storage mechanisms are used to store catalysts used in the reaction process. A plurality of replacement mechanisms are provided on the surface of the reaction tower 2 corresponding to the positions of the plurality of storage mechanisms, and the replacement mechanisms are used to replace the deactivated catalysts during the reaction process. A driving mechanism is provided inside the reaction tower 2, and the driving mechanism is used to act on the storage mechanism to dock the storage mechanism with the replacement mechanism to discharge and add the catalyst inside. A scraping mechanism is provided inside the storage mechanism, and the scraping mechanism is used to scrape the catalyst during the process of discharging the catalyst.

[0033] The storage mechanism includes two semicircular layers 5, which are assembled and arranged inside the reaction tower 2. A storage cavity 6 is formed inside the layers 5, and a plurality of air holes 7 are formed on the surface of the layers 5. An addition port 8 is formed on the side of the two layers 5 away from each other. A blocking plate 9 is elastically and slidably connected to the addition port 8, and the side of the blocking plate 9 away from the addition port 8 is an arc-shaped protrusion;

[0034] The replacement mechanism includes an addition pipe 10 and a discharge pipe 11. The addition pipe 10 and the discharge pipe 11 are both connected to the surface of the reaction tower 2. The addition pipe 10 and the discharge pipe 11 are located on the side of the layer plate 5 close to the addition port 8. The addition pipe 10 is located above the discharge pipe 11. The addition pipe 10 and the discharge pipe 11 are both inclined. The inner wall of the addition pipe 10 and the discharge pipe 11 on the side close to the layer plate 5 is shorter than the inner wall on the side away from the layer plate 5.

[0035] The drive mechanism includes two rotating shafts 12, which are respectively fixedly connected to the inside of the two layer plates 5. The two rotating shafts 12 pass through the two layer plates 5 and are rotatably connected to the inner wall surface of the reaction tower 2. A retractable connecting plate 13 is fixedly connected to the side of the two layer plates 5 that are close to each other. Two driving cylinders 14 are fixedly connected to the inner wall surface of the reaction tower 2. The driving cylinders 14 are electrically connected to an external controller. The telescopic ends of the two driving cylinders 14 are commonly fixedly connected to a push rod 15. The two connecting plates 13 are both hinged to the surface of the push rod 15.

[0036] The scraping mechanism includes a sliding frame 16, which is elastically slidably connected to the bottom of the inner wall of the storage chamber 6. The sliding frame 16 extends to the position of the baffle plate 9. A scraping frame 17 is fixedly connected to the side of the sliding frame 16 away from the baffle plate 9. The scraping frame 17 is in contact with the bottom of the inner wall of the storage chamber 6. The front and rear side walls of the addition pipe 10 and the discharge pipe 11 are each provided with a wavy guide block 18 near the sliding frame 16.

[0037] In the process of coupling reaction of carbon dioxide and ethane, carbon dioxide and ethane gas need to be introduced into the reaction tower 2 through the air inlet pipe 3. When carbon dioxide and ethane gas move to the position of the layer plate 5, carbon dioxide and ethane gas will flow into the storage chamber 6 through the air vent 7 and contact the catalyst. Carbon dioxide and ethane gas will undergo coupling reaction under the action of the catalyst. After carbon dioxide and ethane gas react for a period of time, the activity of the catalyst will gradually decrease. Then the external controller will control the driving cylinder 14 to extend, and the driving cylinder 14 will drive the push rod 15 to move upward. The push rod 15 will drive the side of the two layer plates 5 that are close to each other to move upward through the two connecting plates 13. The layer plates 5 will flip around the rotating shaft 12, and the side of the two layer plates 5 that are away from each other will turn around. It will flip downward, and the blocking plate 9 and the adding port 8 will flip to the position of the discharge pipe 11 under the action of the layer plate 5, and the blocking plate 9 will be blocked by the upper inner wall of the discharge pipe 11, and then the bottom of the layer plate 5 will contact the bottom inner wall of the discharge pipe 11, the blocking plate 9 will open, and the adding port 8 will be connected with the discharge pipe 11, and the catalyst inside the storage chamber 6 will roll along the inclined storage chamber 6 through the adding port 8 to the discharge pipe 11 for discharge, and when the bottom of the layer plate 5 passes over the upper inner wall of the discharge pipe 11, the blocking plate 9 will be blocked by the upper inner wall of the discharge pipe 11, and the sliding frame 16 will contact the guide block 18 on the front and rear side wall surfaces of the discharge pipe 11, and then as the layer plate 5 continues to flip downward, the sliding frame 16 will move along the surface of the guide block 18, and the sliding frame 16 and the scraper frame 17 will be on the guide block 18 reciprocates, and the scraper frame 17 scrapes the catalyst inside the storage chamber 6, which is conducive to making the catalyst roll quickly into the discharge pipe 11, and avoids the catalyst from accumulating inside the storage chamber 6 and not being able to roll into the discharge pipe 11, thereby affecting the subsequent addition of catalyst. Then, after the catalyst inside the storage chamber 6 is discharged, the drive motor contracts and drives the push rod 15 to move downward together. The push rod 15 will drive the side of the two layers 5 close to each other to move downward through the connecting plate 13, and the side of the two layers 5 away from each other will flip upward. The layer 5 will first flip to the horizontal, and the blocking plate 9 will block the addition port 8 again. Then the layer 5 continues to flip upward, and the addition port 8 and the blocking plate 9 will move to the position of the addition pipe 10, and the bottom of the addition pipe 10 The inner wall will block the blocking plate 9, and the addition port 8 will be connected to the addition pipe 10. The addition pipe 10 will add the catalyst to the storage chamber 6 through the addition port 8, which is beneficial to the automatic discharge and addition of the deactivated catalyst during the reaction of carbon dioxide and ethane. The replacement speed is fast, which reduces the manual workload and does not require stopping the reaction inside the reaction tower 2, avoiding the need to terminate the reaction and open the reaction tower 2 when replacing the catalyst. The replacement time is long, which affects the reaction process of carbon dioxide and ethane. Subsequently, when the layer plate 5 is flipped downward again, the sliding frame 16 will move back and forth under the action of the guide blocks 18 on the front and rear inner wall surfaces of the addition pipe 10, and the movement of the scraper frame 17 will scrape the catalyst inside the storage chamber 6, which is beneficial to the uniform arrangement of the catalyst.This facilitates the subsequent full contact of carbon dioxide with ethane and catalyst.

[0038] During the process of discharging the catalyst from the storage chamber 6, the catalyst at the vent hole 7 cannot be smoothly removed from the storage chamber 6. As a further solution of the present invention, a flip plate 19 is elastically hingedly connected to the inner wall surface of the vent hole 7. The flip plate 19 has a vent hole 20 formed on its surface. A knock block 21 is fixedly connected to the surface of the flip plate 19. When discharging the catalyst inside the storage chamber 6, the blocking plate 9 will move to the position of the discharge pipe 11 under the action of the flipping of the layer plate 5, and the addition port 8 is connected to the discharge pipe 11. In the process of gradually discharging the catalyst inside the storage chamber 6, the reaction inside the reaction tower 2 continues, and the gas will still pass through the air holes 7 and the air holes 20 through the layer plate 5. When the catalyst on the surface of the flip plate 19 gradually decreases, the air flow will cause the flip plate 19 to rotate, and the rotation of the flip plate 19 will push the catalyst on the surface to the side close to the discharge pipe 11, which is beneficial to the process of discharging the catalyst inside the storage chamber 6. By moving the catalyst near the discharge pipe 11, the catalyst can be quickly discharged from the storage chamber 6, and the catalyst can be prevented from accumulating at the air vent 7 and being difficult to discharge. The inactivated catalyst will hinder the circulation of carbon dioxide and ethane, and carbon dioxide and ethane gases are difficult to contact with new catalysts, reducing the reaction rate. After the flip plate 19 moves the surface catalyst to one side, the flip plate 19 will swing back and forth under the action of carbon dioxide and ethane gases, and the knocking block 21 will swing back and forth and knock the inner wall of the storage chamber 6, which can cause the layer plate 5 to vibrate to a certain extent, which is beneficial for the catalyst inside the storage chamber 6 to be quickly moved out of the storage chamber 6.

[0040] During the process of adding catalyst to the storage chamber 6, after the adding tube 10 adds catalyst to the storage chamber 6 and the layer plate 5 returns to its original position, the catalyst inside the adding tube 10 will fall onto the layer plate 5. As a further solution of the present invention, the ends of the adding tube 10 and the discharge tube 11 are elastically and slidably connected with an L-shaped sealing plate 22. The sealing plate 22 seals the ends of the adding tube 10 and the discharge tube 11. When the layer plate 5 rotates, it causes the sealing plate 22 to move.

[0041] During the process of flipping the layer plate 5 to discharge the catalyst, when the layer plate 5 flips to the position of the discharge pipe 11, the blocking plate 9 will be blocked by the inner wall above the discharge pipe 11, and the layer plate 5 will push the sealing plate 22 downward, and the addition port 8 will be connected with the discharge pipe 11 to discharge the catalyst. Subsequently, during the process of the layer plate 5 returning to its original position, the sealing plate 22 will re-seal the addition pipe 10 to prevent carbon dioxide and ethane gas from escaping through the discharge pipe 11. When the layer plate 5 flips upward to add the catalyst, the layer plate 5 will push the sealing plate 22 upward along the addition pipe 10, and then the addition port 8 will be connected with the addition pipe 10 to add the catalyst. After the catalyst is added, during the process of the layer plate 5 returning to its original position, the sealing plate 22 will re-seal the addition pipe 10 to prevent excess catalyst inside the addition pipe 10 from falling onto the top of the layer plate 5, making it difficult to clean.

[0042] During the process of adding the catalyst into the storage chamber 6, the catalyst will move along the inclined layer plate 5 to one side of the storage chamber 6. As a further solution of the present invention, a plurality of material blocking grooves 23 are provided at the bottom of the inner wall of the storage chamber 6. The side of the material blocking groove 23 away from the addition port 8 is arc-shaped, and the side of the material blocking groove 23 close to the addition port 8 is an inclined surface.

[0043] In the process of adding catalyst into the storage chamber 6, the catalyst will enter the storage chamber 6 through the adding tube 10, and then the catalyst will move along the storage chamber 6. When the catalyst moves into the material blocking groove 23, part of the catalyst will remain in the arc of the material blocking groove 23 away from the adding port 8. This is beneficial for the catalyst to be evenly distributed in the storage chamber 6 under the action of the material blocking groove 23 during the process of moving into the storage chamber 6, thereby increasing the subsequent contact area between carbon dioxide and ethane gas and the catalyst and improving the catalytic efficiency. Subsequently, in the process of discharging the catalyst, the catalyst will move out of the material blocking groove 23 along the inclined surface of the material blocking groove 23 close to the adding port 8.

[0044] During the flipping process of the layer plate 5, carbon dioxide and ethane gas will flow between the layer plate 5 and the reaction tower 2. As a further embodiment of the present invention, the edges of the layer plate 5 and the baffle plate 9 are both curved, and a soft sealing ring 24 is fixedly connected to the inner wall surface of the reaction tower 2;

[0045] During the flipping process of the layer plate 5, the arc at the edge of the layer plate 5 can make the layer plate 5 flip more smoothly, and the sealing ring 24 can seal the edge of the layer plate 5 when the layer plate 5 returns to its original position, preventing carbon dioxide and ethane gas from flowing between the layer plate 5 and the inner wall of the reaction tower 2.

[0046] The method for adding catalyst using the above-mentioned catalyst adding device for carbon dioxide ethane coupling has the following specific steps:

[0047] Step 1: When carbon dioxide and ethane undergo a coupling reaction, carbon dioxide and ethane gases need to be added into the reaction tower 2 through the air inlet pipe 3, and a catalyst will be stored inside the storage mechanism;

[0048] Step 2: After the carbon dioxide and ethane react for a period of time, when the catalyst needs to be replaced, the driving mechanism will activate the storage mechanism to discharge the internal catalyst;

[0049] Step 3: The replacement mechanism will then add new catalyst to the interior of the storage mechanism;

[0050] Step 4: When discharging the catalyst, the scraping mechanism will act on the catalyst to move it, making it easier to discharge the catalyst quickly;

[0051] Step 5: After the replacement is completed, carbon dioxide and ethane can continue to undergo coupling reaction.

[0052] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0053] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A catalyst adding device for carbon dioxide ethane coupling, comprising a support frame (1), characterized in that: A reaction tower (2) is installed in the support frame (1), the bottom of the reaction tower (2) is connected to an air inlet pipe (3), the upper surface of the reaction tower (2) is connected to an exhaust pipe (4), a plurality of storage mechanisms are arranged inside the reaction tower (2), the storage mechanisms are used to store catalysts used in the reaction process, a plurality of replacement mechanisms are arranged on the surface of the reaction tower (2) corresponding to the positions of the plurality of storage mechanisms, the replacement mechanisms are used to replace deactivated catalysts in the reaction process, a driving mechanism is arranged inside the reaction tower (2), the driving mechanism is used to act on the storage mechanism so that the storage mechanism and the replacement mechanism are connected to discharge and add the catalyst inside, a scraping mechanism is arranged inside the storage mechanism, the scraping mechanism is used to scrape the catalyst in the process of discharging the catalyst.

2. The catalyst adding device for carbon dioxide ethane coupling according to claim 1, characterized in that: The storage mechanism comprises two semicircular layer plates (5), which are arranged inside the reaction tower (2) after being combined, a storage cavity (6) is provided inside the layer plates (5), a plurality of air holes (7) are provided on the surface of the layer plates (5), and an addition port (8) is provided on the side away from each other of the two layer plates (5), a blocking plate (9) is elastically slidably connected inside the addition port (8), and the side of the blocking plate (9) away from the addition port (8) is an arc-shaped protrusion.

3. The catalyst adding device for carbon dioxide ethane coupling according to claim 2, characterized in that: The replacement mechanism comprises an addition pipe (10) and a discharge pipe (11), the addition pipe (10) and the discharge pipe (11) are both connected to the surface of the reaction tower (2), the addition pipe (10) and the discharge pipe (11) are located on the side of the layer plate (5) close to the addition port (8), the addition pipe (10) is located above the discharge pipe (11), the addition pipe (10) and the discharge pipe (11) are both arranged at an angle, and the inner wall of the addition pipe (10) and the discharge pipe (11) on the side close to the layer plate (5) is shorter than the inner wall on the side away from the layer plate (5).

4. The catalyst adding device for carbon dioxide ethane coupling according to claim 3, characterized in that: The driving mechanism comprises two rotating shafts (12), the two rotating shafts (12) are respectively fixedly connected inside the two layer plates (5), and the two rotating shafts (12) are rotatably connected to the inner wall surface of the reaction tower (2) after passing through the two layer plates (5), and a retractable connecting plate (13) is fixedly connected to the side of the two layer plates (5) close to each other, and two driving cylinders (14) are fixedly connected to the inner wall surface of the reaction tower (2), and the driving cylinders (14) are electrically connected to an external controller. The telescopic ends of the two driving cylinders (14) are commonly fixedly connected to a push rod (15), and the two connecting plates (13) are hinged to the surface of the push rod (15).

5. The catalyst adding device for carbon dioxide ethane coupling according to claim 3, characterized in that: The scraping mechanism comprises a sliding frame (16), the sliding frame (16) is elastically slidably connected to the bottom of the inner wall of the storage chamber (6), the sliding frame (16) extends to the position of the blocking plate (9), the side of the sliding frame (16) away from the blocking plate (9) is fixedly connected to a scraping frame (17), the scraping frame (17) is in contact with the bottom of the inner wall of the storage chamber (6), and the front and rear side walls of the adding pipe (10) and the discharging pipe (11) are both provided with a wavy guide block (18) on the side close to the sliding frame (16).

6. The catalyst adding device for carbon dioxide ethane coupling according to claim 2, characterized in that: A flip plate (19) is elastically hinged on the inner wall surface of the air vent (7), a vent hole (20) is opened on the surface of the flip plate (19), and a knocking block (21) is fixedly connected to the surface of the flip plate (19).

7. The catalyst adding device for carbon dioxide ethane coupling according to claim 3, characterized in that: The ends of the addition pipe (10) and the discharge pipe (11) are elastically slidably connected with an L-shaped sealing plate (22), and the sealing plate (22) seals the ends of the addition pipe (10) and the discharge pipe (11). When the layer plate (5) rotates, it acts on the sealing plate (22) to move.

8. The catalyst adding device for carbon dioxide ethane coupling according to claim 2, characterized in that: A plurality of material blocking grooves (23) are provided at the bottom of the inner wall of the storage cavity (6); the side of the material blocking groove (23) away from the addition port (8) is arc-shaped, and the side of the material blocking groove (23) close to the addition port (8) is an inclined surface.

9. The catalyst adding device for carbon dioxide ethane coupling according to claim 2, characterized in that: The edges of the layer plate (5) and the blocking plate (9) are both arc-shaped, and a soft sealing ring (24) is fixedly connected to the inner wall surface of the reaction tower (2).

10. A method for adding catalyst using the catalyst adding device for carbon dioxide ethane coupling according to any one of claims 1 to 9, characterized in that: The specific steps of this method are as follows: Step 1: When carbon dioxide and ethane are coupled to react, carbon dioxide and ethane gases need to be added into the reaction tower (2) through the air inlet pipe (3), and a catalyst is stored inside the storage mechanism; Step 2: After carbon dioxide and ethane react for a period of time, when the catalyst needs to be replaced, the driving mechanism will act on the storage mechanism to discharge the internal catalyst; Step 3: The replacement mechanism will then add new catalyst to the interior of the storage mechanism; Step 4: When discharging the catalyst, the scraping mechanism will act on the catalyst to move it, making it easier to quickly discharge the catalyst; Step 5: After the replacement is completed, carbon dioxide and ethane can continue to undergo coupling reaction.

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