Propane dehydrogenation catalyst preparation device and method

Abstract

The invention provides a propane dehydrogenation catalyst preparation device and method. A propane dehydrogenation catalyst preparation device comprises a kettle body; the kettle cover is arranged at the top of the kettle body, the lower end of the transmission unit is in transmission connection with a stirring unit positioned in the stirring cavity, a plurality of stirring rods are arranged at the lower part of the stirring unit, and an adjusting assembly is arranged in each stirring rod; the adjusting assembly comprises an inner sliding cavity formed in the stirring rod, a sleeve rod fixedly arranged in the inner sliding cavity, an extrusion spring arranged outside the sleeve rod in a sleeving mode, a feedback block arranged outside the sleeve rod in a sliding and sleeving mode and fixedly connected with the end, close to the stirring unit, of the extrusion spring, and a rectangular groove cavity formed in the bottom of the stirring rod in an inward sunken mode. The adjusting rod is in an arc shape, one end of the steel wire rope is connected with the end, away from the hinged end, of the adjusting rod, and the other end of the steel wire rope is connected with the feedback block. The mixing dead angle is effectively eliminated, and the distribution uniformity of active components of the catalyst is improved.

Description

Technical Field

[0001] This invention relates to a catalyst preparation apparatus and method, specifically to a propane dehydrogenation catalyst preparation apparatus and method, belonging to the field of chemical production equipment technology. Background Technology

[0002] In the propane dehydrogenation to propylene process, the performance of the catalyst directly determines the propylene yield and the operating cycle of the unit. Currently, mainstream propane dehydrogenation catalysts typically use alumina or other porous materials as supports, loading active components such as platinum and tin, as well as additives. During catalyst preparation, impregnation or co-precipitation methods are commonly used to mix the active component precursor solution with the support. During mixing, the uniformity of the active component's dispersion on the support surface directly affects the final active site distribution of the catalyst.

[0003] However, existing reactor-type catalyst preparation mixing devices typically employ impellers with fixed shapes and angles. During catalyst preparation, the local viscosity and concentration of the slurry change as components are added and mixing time progresses. Fixed impellers cannot effectively agitate high-viscosity or high-concentration areas, resulting in a stable and uniform flow field within the reactor. This easily leads to mixing dead zones near the agitator shaft or far from the impeller blades, causing uneven loading of active components and affecting catalyst performance.

[0004] Furthermore, catalyst slurries typically possess a certain degree of adhesion, and during heating and stirring, the slurry easily adheres to the inner wall of the reactor, forming a wall-mounted layer. This not only leads to raw material waste and alters the formulation ratio but also affects the heat transfer efficiency of the jacket heating due to an excessively thick wall-mounted layer, resulting in uneven localized temperatures. In existing agitators with wall-scraping functions, the scraper is always in contact with the inner wall, resulting in high frictional resistance and rapid wear, or a separate drive mechanism is required to control the opening and closing of the scraper, leading to complex structures and high maintenance costs. Summary of the Invention

[0005] Based on the above background, the purpose of this invention is to provide a propane dehydrogenation catalyst preparation apparatus and method, which solves the problem in the prior art that when the reactor faces local high concentration and high viscosity raw materials, mixing dead zones are easily formed, resulting in uneven mixing of active components and support, thus affecting the catalyst activity.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0007] An apparatus for preparing a propane dehydrogenation catalyst, comprising:

[0008] The vessel body is a cylindrical tank with a stirring chamber inside, and a discharge port communicating with the stirring chamber is located at the bottom center of the vessel body;

[0009] A heat jacket is fitted outside the vessel body. The heat jacket has a heating chamber inside. The heat jacket is provided with an injection pipe that connects to the upper side of the internal heating chamber and an outlet pipe that connects to the lower side of the internal heating chamber. The injection pipe and the outlet pipe are used to connect to an external circulating heating device.

[0010] The lid is located on the top of the vessel body. A transmission unit is vertically installed at the center of the top of the lid. The lower end of the transmission unit is connected to a stirring unit located in the stirring chamber. The lower part of the stirring unit is provided with several stirring rods, and each stirring rod is provided with an adjustment component.

[0011] The adjusting assembly includes an inner sliding cavity inside the stirring rod, a sleeve rod fixedly disposed inside the inner sliding cavity, a compression spring sleeved outside the sleeve rod, a feedback block slidably sleeved outside the sleeve rod and fixedly connected to one end of the compression spring adjacent to the stirring unit, a rectangular groove recessed inward at the bottom of the stirring rod, an adjusting rod hinged to the side wall of the rectangular groove, and a steel wire rope. The adjusting rod is arc-shaped, one end of the steel wire rope is connected to the end of the adjusting rod away from its hinge end, and the other end of the steel wire rope is connected to the feedback block.

[0012] Preferably, the adjustment assembly further includes a rotating rod disposed on the side wall of the rectangular cavity, the adjustment rod being rotatably disposed about the rotating rod as an axis; the top wall of the rectangular cavity can limit the upward rotation range of the adjustment rod, and the wire rope can limit the downward rotation range of the adjustment rod.

[0013] Preferably, the feedback block and the adjusting rod form a linkage mechanism via the wire rope. The linkage mechanism is configured such that when the feedback block moves along the sleeve rod in the direction of compressing the spring, the wire rope pulls the adjusting rod to rotate upward around the rotating rod.

[0014] Preferably, when the compression spring is in its naturally extended state, the adjusting rod is kept in a downward rotating state under the action of gravity, and its maximum rotation path is limited by the extension length of the wire rope.

[0015] Preferably, the stirring rod is further provided with a centrifugal assembly, which includes a centrifugal chamber fixedly disposed on the outer side of the stirring rod, a clamping rod fixedly disposed in the centrifugal chamber, a spring sleeved on the outside of the clamping rod, a counterweight block slidably disposed on the outside of the clamping rod and fixedly connected to the end of the spring sleeve away from the stirring unit, a centrifugal sleeve fixedly connected to the end of the counterweight block away from the clamping rod, and a trigger block disposed at the end of the centrifugal sleeve. One end of the centrifugal sleeve extends through the centrifugal chamber, and the counterweight block and the centrifugal sleeve are slidably disposed along the axial direction of the clamping rod.

[0016] Preferably, the vessel body is provided with a cleaning rack inside the stirring chamber, the inner wall of the stirring chamber is provided with a slide rail, the top of the cleaning rack is rotatably embedded in the slide rail, the outer wall of the cleaning rack is tightly fitted to the inner wall of the stirring chamber, and the discharge port penetrates through the bottom of the cleaning rack.

[0017] Preferably, the trigger block is configured to engage with the inner wall of the cleaning frame when the counterweight moves along the lever under centrifugal force and causes the centrifugal sleeve to extend to its furthest distance.

[0018] Preferably, the transmission unit includes a drive motor and a reducer disposed at the bottom of the drive motor and connected to it in transmission. The reducer is provided with a mounting base fixedly connected to the vessel lid at the connection point with the vessel lid, and the output end of the reducer is connected to the stirring unit in transmission.

[0019] Preferably, the stirring unit includes a rotating shaft that is drivenly connected to the output end of the reducer and a bottom stirrer fixedly disposed at the bottom end of the rotating shaft.

[0020] A method for preparing a propane dehydrogenation catalyst using a propane dehydrogenation catalyst preparation apparatus as described in any of the preceding claims, the method comprising the following steps:

[0021] Add the carrier, active component precursor, and additives into the stirring chamber of the reactor.

[0022] Start the external circulation heating equipment, and introduce the heating medium into the heat jacket through the injection pipe. The medium then circulates back through the outlet pipe to raise the temperature of the stirring chamber to the set temperature.

[0023] The transmission unit is started, driving the stirring unit to rotate. The raw materials are stirred and mixed by the stirring rod. During the stirring process, the adjustment component adjusts the rotation amplitude of the adjustment rod according to the resistance of the raw materials.

[0024] After the reaction is complete, the transmission unit and external circulating heating equipment are turned off, and the product is collected through the discharge port.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] This invention discloses a propane dehydrogenation catalyst preparation apparatus and method. By setting a specially structured adjustment component on the stirring rod, the stirring range is changed using the resistance feedback of the raw material itself, eliminating mixing dead zones and significantly improving the uniformity of the distribution of active components in the propane dehydrogenation catalyst. The adjustment component uses a dual action of driving the adjustment rod to rotate through the raw material resistance feedback and driving the adjustment rod to oscillate through centrifugal force. This can both push the adjustment rod to increase the stirring range for local high-concentration raw materials and break the stable flow field of the stirring chamber to form local turbulence by means of oscillation, effectively eliminating mixing dead zones and allowing the active component precursor, support material and additives to fully contact. This solves the problem of uneven mixing caused by the fixed stirring trajectory in traditional fixed stirring structures, and ultimately improves the uniformity of the distribution of active components in the catalyst.

[0027] The adjustment component of this invention automatically adjusts the rotation amplitude of the adjustment rod by the resistance of the raw material. When processing raw materials with different viscosities and solid contents, it can maintain a good stirring effect without the need for manual replacement of the stirring parts. This broadens the adaptability of the device to different catalyst formulation systems, reduces the operating cost of frequent equipment adjustments due to changes in raw material characteristics, and ultimately enhances the adaptability of the device to different raw materials.

[0028] The centrifugal assembly of the present invention moves the counterweight, centrifugal sleeve and trigger block by increasing the rotation speed, which in turn drives the cleaning frame to rotate in the slide rail. It can scrape off the raw materials attached to the inner wall of the stirring chamber in real time, avoiding the side reaction or contamination of subsequent batches of catalyst after the accumulation of residual raw materials. It solves the problems of traditional devices that require shutdown for manual cleaning and are prone to residual impurities. Attached Figure Description

[0029] 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.

[0030] Figure 1 This is a three-dimensional structural schematic diagram of a propane dehydrogenation catalyst preparation device according to the present invention, viewed from a half-section perspective.

[0031] Figure 2 This is a schematic diagram of a propane dehydrogenation catalyst preparation apparatus of the present invention after the cleaning rack has been removed;

[0032] Figure 3 This is a schematic diagram of the external structure of a propane dehydrogenation catalyst preparation apparatus according to the present invention;

[0033] Figure 4 This is a schematic diagram of the internal structure of a propane dehydrogenation catalyst preparation device according to the present invention;

[0034] Figure 5 This is a schematic diagram of the transmission unit and stirring unit in this invention;

[0035] Figure 6 This is a partial structural diagram of the adjustment component in this invention;

[0036] Figure 7 This is a partial structural schematic diagram of the centrifuge assembly in this invention;

[0037] In the diagram: 1. Vessel lid; 2. Vessel body; 3. Thermal jacket; 4. Liquid injection pipe; 5. Support; 6. Feeding and inspection hole; 7. Pressure detection pipe; 8. Transmission unit; 9. Reducer; 10. Drive motor; 11. Rotating shaft; 12. Mounting base; 13. Cleaning rack; 14. Slide rail; 15. Bottom agitator; 16. Agitator unit; 17. Agitator rod; 18. Trigger block; 19. Inner sliding cavity; 20. Discharge port; 21. Liquid discharge pipe; 22. Adjusting rod; 23. Steel wire rope; 24. Rotating rod; 25. Counterweight block; 26. Clamping rod; 27. Spring compression spring; 28. Centrifuge sleeve; 29. ​​Adjusting assembly; 30. Sleeve rod; 31. Compression spring; 32. Feedback block; 33. Centrifuge assembly; 34. Centrifuge chamber. Detailed Implementation

[0038] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of the present invention is not limited to the following embodiments, and any modifications and / or alterations made to the present invention will fall within the protection scope of the present invention.

[0039] In this invention, unless otherwise specified, all parts and percentages are by weight, and the equipment and raw materials used are commercially available or commonly used in the art. Unless otherwise specified, the methods in the following embodiments are conventional methods in the art. Unless otherwise specified, the components or equipment in the following embodiments are general standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0040] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In this detailed description, numerous specific details are set forth to facilitate explanation and provide a thorough understanding of the embodiments of the present invention. However, one or more embodiments may be practiced by those skilled in the art without these specific details.

[0041] like Figure 1-7 As shown, an embodiment of the present invention discloses a propane dehydrogenation catalyst preparation apparatus, including a vessel body 2, a thermal jacket 3 fitted outside the vessel body 2, and a vessel cover 1 disposed on the top of the vessel body 2.

[0042] The vessel body 2 is a cylindrical tank with an internal stirring chamber. A discharge port 20, connecting to the stirring chamber, is located at the bottom center of the vessel body 2. The top of the vessel body 2 also has a feeding and inspection hole 6 and a pressure detection pipe 7, both connecting to the stirring chamber. Supports 5 are fixedly connected to both sides of the vessel body 2 to support the device.

[0043] The heat jacket 3 has a heating chamber inside. The heat jacket 3 is provided with an injection pipe 4 that connects to the upper side of the internal heating chamber and an outlet pipe 21 that connects to the lower side of the internal heating chamber. The injection pipe 4 and the outlet pipe 21 are used to connect to an external circulating heating device.

[0044] A transmission unit 8 is vertically mounted at the center of the top of the vessel lid 1. The transmission unit 8 includes a drive motor 10 and a reducer 9 located at the bottom of the drive motor 10 and connected to it. The connection between the reducer 9 and the vessel lid 1 is provided with a mounting base 12 that is fixedly connected to the vessel lid 1. The lower end of the transmission unit 8, i.e., the output end of the reducer 9, is connected to a stirring unit 16 located in the stirring chamber. The lower part of the stirring unit 16 is provided with multiple stirring rods 17, and each stirring rod 17 is provided with an adjusting component 29. The stirring unit 16 includes a rotating shaft 11 that is connected to the output end of the reducer 9 and a bottom stirrer 15 fixedly mounted at the bottom end of the rotating shaft 11.

[0045] During catalyst preparation, the operator adds various raw materials, including the active component precursor, support material, and additives required for propane dehydrogenation catalyst preparation, into the stirring chamber by opening the feeding inspection port 6. After the raw materials are added, the feeding inspection port 6 is sealed. An external power supply is connected, and the drive motor 10 is started. Its power is transmitted via the drive shaft to the reducer 9, which adjusts the speed and then transmits the power to the stirring unit 16. This drives the bottom stirrer 15 and multiple stirring rods 17 to rotate within the stirring chamber, mixing the raw materials and promoting the catalyst preparation reaction. During the reaction, the pressure change within the stirring chamber is monitored in real time through the pressure detection pipe 7 to ensure the reaction proceeds within the preset pressure range. If maintenance or replenishment of raw materials is required, the feeding inspection port 6 can be reopened for operation. During the preparation process, heating medium is supplied to the interior of the heat jacket 3 via the injection pipe 4 connected to the heat jacket 3 through an external heat circulation device. Meanwhile, the outlet pipe 21 of the heat jacket 3 supplies the medium flowing out of the heat jacket 3 to the external circulation device, continuously completing the heat circulation, maintaining the heat inside the reactor 2, and accelerating the reaction time. After the catalyst preparation reaction is completed, the drive motor 10 is stopped, causing the stirring unit 16 to stop rotating. The discharge port 20 at the bottom center of the stirring chamber of the reactor 2 is opened, allowing the prepared propane dehydrogenation catalyst product to be smoothly discharged through the discharge port 20, completing product collection.

[0046] The adjusting assembly 29 includes an inner sliding cavity 19 inside the stirring rod 17, a sleeve rod 30 fixedly disposed inside the inner sliding cavity 19, a compression spring 31 sleeved outside the sleeve rod 30, a feedback block 32 slidably sleeved outside the sleeve rod 30 and fixedly connected to one end of the compression spring 31 adjacent to the stirring unit 16, a rectangular groove recessed inward at the bottom of the stirring rod 17, an adjusting rod 22 hinged to the side wall of the rectangular groove, and a steel wire rope 23. The adjusting rod 22 is arc-shaped, one end of the steel wire rope 23 is connected to the end of the adjusting rod 22 away from its hinged end, and the other end of the steel wire rope 23 is connected to the feedback block 32. Through holes are provided on the path of the steel wire rope 23 connecting the adjusting rod 22 and the feedback block 32, as well as at the contact position between the stirring rod 17 and the feedback block 32, for the movement of the steel wire rope 23.

[0047] The adjusting assembly 29 also includes a rotating rod 24 disposed on the side wall of the rectangular cavity, and the adjusting rod 22 is rotatably mounted about the rotating rod 24. The top wall of the rectangular cavity limits the upward rotation of the adjusting rod 22, and the wire rope 23 limits the downward rotation of the adjusting rod 22. The feedback block 32 and the adjusting rod 22 form a linkage mechanism via the wire rope 23. The linkage mechanism is configured such that when the feedback block 32 moves along the sleeve 30 toward the compression spring 31, the wire rope 23 pulls the adjusting rod 22 to rotate upward around the rotating rod 24. When the compression spring 31 is in its naturally extended state, the adjusting rod 22 remains in a downward rotating state under the action of gravity, and its maximum rotation path is limited by the extension length of the wire rope 23.

[0048] During the stirring process where the stirring unit 16 drives the stirring rod 17 to rotate, if the local concentration of raw materials in the stirring chamber is high and the resistance is large, the raw materials will exert a squeezing force on the adjusting rod 22 at the bottom of the stirring rod 17. This force causes the adjusting rod 22 to rotate around the rotating rod 24 in the rectangular cavity of the stirring rod 17 in a direction away from the stirring unit 16, increasing the stirring range. When the adjusting rod 22 rotates, its end pulls the feedback block 32 through the wire rope 23, causing the feedback block 32 to also move along the sleeve rod 30 away from the stirring unit 16. The feedback block 32 squeezes the compression spring 31 on the outside of the sleeve rod 30, causing the compression spring 31 to undergo compression deformation. The compression deformation of the compression spring 31 generates a reverse elastic force, which is transmitted to the adjusting rod 22 through the feedback block 32 and the wire rope 23, constraining the rotation amplitude of the adjusting rod 22 and preventing the adjusting rod 22 from rotating excessively due to excessive raw material resistance. When the resistance of the raw material decreases, the reverse elastic force of the compression spring 31 pushes the feedback block 32 to reset along the sleeve rod 30, causing the adjusting rod 22 to rotate towards the stirring unit 16, thereby reducing the stirring range and realizing the adjustment according to the change of the raw material resistance.

[0049] Furthermore, during the rotation of the stirring unit 16, the feedback block 32 moves synchronously with the stirring rod 17 in a circular motion. Under the action of centrifugal force, the feedback block 32 tends to move away from the stirring unit 16, thereby squeezing the compression spring 31 on the outside of the sleeve rod 30. When the speed of the stirring unit 16 changes dynamically, such as when the speed reducer 9 adjusts the speed, or when the instantaneous speed change is caused by fluctuations in the raw material resistance, the magnitude of the centrifugal force on the feedback block 32 also changes accordingly. When the centrifugal force increases, the distance the feedback block 32 moves away from the stirring unit 16 increases, the compression of the compression spring 31 increases, and the upward rotation amplitude of the adjusting rod 22 pulled by the wire rope 23 increases; when the centrifugal force decreases, the compression spring 31 releases its elastic potential energy, pushing the feedback block 32 back towards the stirring unit 16, and the downward rotation amplitude of the adjusting rod 22 under the traction of the wire rope 23 increases. The adjusting rod 22 is always limited by the outer wall of the stirring rod 17 on the upper side of the rectangular trough (to prevent excessive upward rotation) and the length of the wire rope 23 (to prevent excessive downward rotation), ensuring that the oscillating rotation is always within the preset safety range and avoiding collision between the adjusting rod 22 and the inner wall of the stirring chamber or other components.

[0050] Through the dynamic changes in centrifugal force and the resetting action of the compression spring 31, the feedback block 32 reciprocates along the sleeve rod 30, continuously driving the wire rope 23 to pull the adjusting rod 22 to oscillate up and down around the rotating rod 24. This oscillating rotation can break the stable flow field of the raw materials in the mixing chamber, forming local turbulence, avoiding mixing dead zones caused by a fixed mixing trajectory. At the same time, in conjunction with the raw material resistance feedback adjustment, it further improves the mixing uniformity of raw materials with different concentrations and viscosities, ensuring the full integration of active components and carriers during catalyst preparation.

[0051] The stirring rod 17 is also equipped with a centrifugal assembly 33. The centrifugal assembly 33 includes a centrifugal chamber 34 fixedly disposed on the outer side of the stirring rod 17, a clamping rod 26 fixedly disposed in the centrifugal chamber 34, a spring 27 sleeved on the outside of the clamping rod 26, a counterweight 25 slidably sleeved on the outside of the clamping rod 26 and fixedly connected to the end of the spring 27 away from the stirring unit 16, a centrifugal sleeve 28 fixedly connected to the end of the counterweight 25 away from the clamping rod 26, and a trigger block 18 disposed at the end of the centrifugal sleeve 28. One end of the centrifugal sleeve 28 extends through the centrifugal chamber 34, and the counterweight 25 and the centrifugal sleeve 28 are slidably disposed along the axial direction of the clamping rod 26. The counterweight 25 and the centrifugal sleeve 28 are respectively penetrated by the clamping rod 26, and the counterweight 25 and the centrifugal sleeve 28 can slide along the outside of the clamping rod 26. When the counterweight 25 moves toward the stirring unit 16, the spring 27 is compressed on the clamping rod 26.

[0052] The vessel body 2 has a cleaning frame 13 inside the stirring chamber. A slide rail 14 is provided on the inner wall of the stirring chamber, and the top of the cleaning frame 13 is rotatably embedded in the slide rail 14. The outer wall of the cleaning frame 13 is tightly fitted against the inner wall of the stirring chamber, and the discharge port 20 passes through the bottom of the cleaning frame 13. The trigger block 18 is configured to engage with the inner wall of the cleaning frame 13 when the counterweight 25 moves along the locking rod 26 under centrifugal force, causing the centrifugal sleeve 28 to extend to its maximum distance. The cleaning frame 13 has a grid-like structure with through-holes, allowing the trigger block 18 to engage with the grid gaps, thereby rotating the cleaning frame 13.

[0053] During the rotation of the stirring unit 16 driven by the transmission unit 8, when it is necessary to increase the stirring speed to enhance the mixing effect, the speed of the stirring unit 16 is increased by the reducer 9. When the speed of the stirring unit 16 increases, the counterweight 25 is subjected to centrifugal force and moves away from the stirring unit 16 along the clamp 26 within the centrifugal chamber 34. During the movement, the counterweight 25 drives the centrifugal sleeve 28 to move synchronously. When the counterweight 25 moves to the maximum distance, the trigger block 18 at the end of the centrifugal sleeve 28 engages with the inner wall of the cleaning frame 13. At this time, the stirring unit 16 continues to rotate, and the trigger block 18 drives the cleaning frame 13 to rotate synchronously in the slide rail 14 on the inner wall of the stirring chamber. Since the outer wall of the cleaning frame 13 is tightly attached to the inner wall of the stirring chamber, the cleaning frame 13 can scrape and clean the raw materials adhering to the inner wall of the stirring chamber during the rotation of the cleaning frame 13. The scraped raw materials fall back into the stirring chamber to participate in the mixing reaction, avoiding the accumulation of raw material residue.

[0054] When the stirring speed decreases or stops, the centrifugal force on the counterweight 25 decreases, and the elastic spring 27 on the outside of the clamp 26 releases its elastic potential energy, pushing the counterweight 25 to move along the clamp 26 towards the stirring unit 16. The counterweight 25 drives the centrifugal sleeve 28 and the trigger block 18 to reset synchronously. The trigger block 18 disengages from the inner wall of the cleaning frame 13, and the cleaning frame 13 stops rotating. Through the cooperation of the centrifugal unit and the cleaning frame 13, the stirring process and the inner wall cleaning are synchronized, eliminating the need for an additional independent cleaning mechanism and machine shutdown. This improves the purity of the catalyst preparation, ensures the continuity of the preparation process, and increases production efficiency.

[0055] The embodiments of the present invention also disclose a method for preparing a propane dehydrogenation catalyst using a propane dehydrogenation catalyst preparation apparatus as described above, the method comprising the following steps:

[0056] Add the carrier, active component precursor and additives to the stirring chamber of the vessel 2;

[0057] Start the external circulation heating equipment, and introduce the heating medium into the heat jacket 3 through the injection pipe 4. The medium circulates back through the outlet pipe 21 to raise the temperature of the stirring chamber to the set temperature.

[0058] The transmission unit 8 is started, driving the stirring unit 16 to rotate. The stirring rod 17 stirs and mixes the raw materials. During the stirring process, the adjustment component 29 adjusts the rotation amplitude of the adjustment rod 22 according to the resistance of the raw materials.

[0059] After the reaction is complete, the transmission unit 8 and the external circulating heating equipment are turned off, and the product is collected through the discharge port 20.

[0060] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An apparatus for preparing a propane dehydrogenation catalyst, characterized in that: The propane dehydrogenation catalyst preparation apparatus includes: The vessel body (2) is a cylindrical tank and has a stirring chamber inside. The bottom center of the vessel body (2) has a discharge port (20) that connects to the stirring chamber. A heat jacket (3) is fitted outside the vessel body (2). The heat jacket (3) has a heating chamber inside. The heat jacket (3) is provided with an injection pipe (4) that connects to the upper side of the heating chamber inside and an outlet pipe (21) that connects to the lower side of the heating chamber inside. The injection pipe (4) and the outlet pipe (21) are used to connect to an external circulating heating device. The lid (1) is set on the top of the vessel body (2). A transmission unit (8) is vertically provided at the middle of the top of the lid (1). The lower end of the transmission unit (8) is connected to a stirring unit (16) located in the stirring chamber. The lower part of the stirring unit (16) is provided with several stirring rods (17). Each stirring rod (17) is provided with an adjustment component (29). The adjustment assembly (29) includes an inner sliding cavity (19) opened inside the stirring rod (17), a sleeve rod (30) fixedly installed in the inner sliding cavity (19), a compression spring (31) sleeved outside the sleeve rod (30), a feedback block (32) slidably sleeved outside the sleeve rod (30) and fixedly connected to one end of the compression spring (31) adjacent to the stirring unit (16), a rectangular groove recessed inward at the bottom of the stirring rod (17), an adjustment rod (22) hinged to the side wall of the rectangular groove, and a steel wire rope (23). The adjustment rod (22) is arc-shaped, one end of the steel wire rope (23) is connected to the end of the adjustment rod (22) away from its hinge end, and the other end of the steel wire rope (23) is connected to the feedback block (32).

2. The propane dehydrogenation catalyst preparation apparatus according to claim 1, characterized in that: The adjustment assembly (29) also includes a rotating rod (24) disposed on the side wall of the rectangular cavity, and the adjustment rod (22) is rotatably disposed about the rotating rod (24) as the axis; the top wall of the rectangular cavity can limit the upward rotation of the adjustment rod (22), and the wire rope (23) can limit the downward rotation of the adjustment rod (22).

3. The propane dehydrogenation catalyst preparation apparatus according to claim 2, characterized in that: The feedback block (32) and the adjusting rod (22) form a linkage mechanism through the wire rope (23). The linkage mechanism is configured such that when the feedback block (32) moves along the sleeve rod (30) toward the compression spring (31), the adjusting rod (22) is pulled upward around the rotating rod (24) by the wire rope (23).

4. The propane dehydrogenation catalyst preparation apparatus according to claim 1, characterized in that: When the compression spring (31) is in its naturally extended state, the adjusting rod (22) is kept in a downward rotating state under the action of gravity, and its maximum rotation path is limited by the extension length of the wire rope (23).

5. The propane dehydrogenation catalyst preparation apparatus according to claim 1, characterized in that: The stirring rod (17) is also provided with a centrifugal assembly (33), which includes a centrifugal chamber (34) fixedly disposed on the outer side of the stirring rod (17), a clamping rod (26) fixedly disposed in the centrifugal chamber (34), a spring compression spring (27) sleeved on the outside of the clamping rod (26), a counterweight (25) slidably sleeved on the outside of the clamping rod (26) and fixedly connected to the end of the spring compression spring (27) away from the stirring unit (16), a centrifugal sleeve (28) fixedly connected to the end of the counterweight (25) away from the clamping rod (26), and a trigger block (18) disposed at the end of the centrifugal sleeve (28). One end of the centrifugal sleeve (28) extends through the centrifugal chamber (34), and the counterweight (25) and the centrifugal sleeve (28) are slidably disposed along the axial direction of the clamping rod (26).

6. The propane dehydrogenation catalyst preparation apparatus according to claim 5, characterized in that: The vessel body (2) is provided with a cleaning rack (13) in the stirring chamber. The inner wall of the stirring chamber is provided with a slide rail (14). The top of the cleaning rack (13) is rotatably embedded in the slide rail (14). The outer wall of the cleaning rack (13) is tightly attached to the inner wall of the stirring chamber. The discharge port (20) penetrates the bottom of the cleaning rack (13).

7. The propane dehydrogenation catalyst preparation apparatus according to claim 6, characterized in that: The trigger block (18) is configured to engage with the inner wall of the cleaning frame (13) when the counterweight (25) moves along the lever (26) under centrifugal force and drives the centrifugal sleeve (28) to extend to the farthest distance.

8. The propane dehydrogenation catalyst preparation apparatus according to claim 1, characterized in that: The transmission unit (8) includes a drive motor (10) and a reducer (9) disposed at the bottom of the drive motor (10) and connected to it in transmission. The reducer (9) is provided with a mounting seat (12) fixedly connected to the lid (1) at the connection part with the lid (1). The output end of the reducer (9) is connected to the stirring unit (16) in transmission.

9. The propane dehydrogenation catalyst preparation apparatus according to claim 8, characterized in that: The stirring unit (16) includes a rotating shaft (11) that is connected to the output end of the reducer (9) and a bottom stirrer (15) that is fixedly installed at the bottom end of the rotating shaft (11).

10. A method for preparing a propane dehydrogenation catalyst using the propane dehydrogenation catalyst preparation apparatus as described in any one of claims 1-9, characterized in that: The method includes the following steps: Add the carrier, active component precursor and additives to the stirring chamber of the vessel body (2); Start the external circulation heating equipment, and introduce the heating medium into the heat jacket (3) through the injection pipe (4). The medium circulates back through the outlet pipe (21) to raise the temperature of the stirring chamber to the set temperature. Start the transmission unit (8) to drive the stirring unit (16) to rotate, and stir and mix the raw materials through the stirring rod (17). During the stirring process, the adjustment component (29) adjusts the rotation amplitude of the adjustment rod (22) according to the resistance of the raw materials. After the reaction is complete, the transmission unit (8) and the external circulating heating equipment are turned off, and the product is collected through the discharge port (20).

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