An apparatus for batch mixing and passivation of catalyst fines

Abstract

The utility model relates to catalyst powder mixing passivation device technical field, especially in kind for catalyst powder batch mixing passivation device. Through setting up the barrel body of inclination, and by drive mechanism drive its rotation, make the inside catalyst powder of barrel produce sustained three -dimensional overturn, realized from static deposit passivation to dynamic full contact passivation fundamental change, improved passivation and mixing's efficiency and uniformity greatly. The conical table closing type inlet / outlet of barrel body top adopts, can effectively limit the dispersal of powder in the operation and transfer process. The inside wall of barrel body is set up and is thrown to the board in the circumference, further enhanced the throwing and convection of powder, ensured the full, fast contact of powder and passivation atmosphere. The whole structure provides an integrated solution for catalyst powder's high efficiency, uniform, low loss batch mixing passivation.

Description

Technical Field

[0001] This utility model relates to the technical field of catalyst powder mixing and passivation device, and in particular to a device for batch mixing and passivation of catalyst powder. Background Technology

[0002] Platinum-carbon catalysts possess a large specific surface area and extremely high surface energy. Freshly prepared platinum nanoparticles in their reduced state exhibit a strong affinity for oxygen. When exposed to air, a violent oxidation reaction occurs, releasing a large amount of heat. Since the activated carbon support itself is also flammable, the accumulated heat can easily cause the temperature to rise to its ignition point, leading to spontaneous combustion, fire, and safety accidents. To fundamentally address this safety hazard, we need to passivate the catalyst. Traditional static passivation involves placing a container containing the sample in an environment with a specific oxygen content for a period of time. However, due to the thickness of the sample buildup, the contact between the passivation atmosphere and the catalyst surface is insufficient, and passivation can only be achieved through diffusion. This process is too lengthy, resulting in poor passivation effects, impacting production schedules, and increasing production costs. Secondly, to ensure the uniformity and consistency of the final product quality, we need to premix catalyst powders from different batches before packaging and use. This process involves mixing and transferring catalyst powders. Accelerating the mixing process and reducing catalyst powder loss during transfer helps lower overall production costs. Utility Model Content

[0003] The purpose of this invention is to overcome the technical defects of existing technologies, such as long static passivation time of catalysts, low efficiency, large transfer loss of catalyst powder, poor mixing effect and low efficiency, and to provide a device for batch mixing and passivation of catalyst powder.

[0004] In a first aspect, the present invention provides an apparatus for batch mixing and passivation of catalyst powder, comprising a support structure; a barrel body, the barrel body being inclinedly disposed on the support structure for holding catalyst powder, the top of which is provided with an inlet / outlet, the inlet / outlet being in the form of a truncated cone, and the inner wall of the barrel body being provided with multiple lifting plates for tipping the powder; and a drive mechanism disposed on the support structure for driving the barrel body to rotate around its central axis.

[0005] This invention utilizes an inclined drum body driven by a drive mechanism to rotate, causing continuous three-dimensional tumbling of the catalyst powder inside. This achieves a fundamental shift from static stacking passivation to dynamic, full-contact passivation, significantly improving the efficiency and uniformity of passivation and mixing. The conical truncated inlet / outlet at the top of the drum effectively limits powder escape during operation and transfer. The circumferentially arranged lifting plates on the inner wall of the drum further enhance powder dispersion and convection, ensuring sufficient and rapid contact between the powder and the passivation atmosphere. The overall structure provides an integrated solution for efficient, uniform, and low-loss batch mixing and passivation of catalyst powder.

[0006] Preferably, the support structure is provided with an inclined support plate, and the barrel body is rotatably connected to the support plate.

[0007] By setting an inclined support plate, when the barrel rotates, the catalyst powder not only rolls around the barrel, but also moves slowly along the inclined axis, forming a composite three-dimensional motion trajectory. This significantly enhances the mixing uniformity between the powders and promotes all-round contact between the powders and the passivation atmosphere.

[0008] Preferably, the angle between the support plate and the horizontal plane is 15°-60°.

[0009] This angle range has been optimized through experiments to ensure that the powder receives sufficient axial movement to achieve thorough mixing, while avoiding excessive angle that could cause powder to accumulate at one end, affecting mixing efficiency and unloading smoothness.

[0010] Preferably, the driving mechanism includes a drive motor and a drive gear, the drive gear being connected to the output end of the drive motor; a driven gear is provided at the bottom center of the barrel; the drive gear meshes with the driven gear.

[0011] The use of a central gear drive ensures direct and efficient power transmission with a constant transmission ratio, guaranteeing the stability and controllability of the barrel's rotation speed and providing a foundation for precise control of passivation process parameters.

[0012] Preferably, the support plate is further provided with at least one auxiliary gear, which cooperates with the driving gear to limit the position of the driven gear and assist the driven gear in rotating.

[0013] The addition of auxiliary gears not only reduces the transmission load on the drive gear, improving the smoothness and reliability of the transmission, but also provides additional radial constraint on the driven gear, effectively preventing the barrel from swaying and vibrating during rotation.

[0014] Preferably, there are two auxiliary gears, and the driving gear and the two auxiliary gears are arranged in a triangle, meshing and surrounding the driven gear.

[0015] The two auxiliary gears and the driving gear form a stable triangular support structure, which makes the force on the driven gear more balanced, greatly improves the rigidity and coaxiality of the transmission system, reduces operating noise, and extends the service life of the gears.

[0016] Preferably, the support plate is provided with at least two barrel support rods, each barrel support rod is fitted with multiple rollers, and the outer wall of the barrel is supported on the rollers.

[0017] The support rod and rollers together form an auxiliary support system for the barrel body, distributing the weight of the barrel and materials to multiple support points and significantly reducing the load on the central gear shaft. The rolling friction of the rollers significantly reduces the rotational resistance of the barrel, making the drive less strenuous and the operation smoother.

[0018] The combination of support rods and rollers not only forms an auxiliary support system for the barrel body, distributing the load and reducing rotational resistance, but the two support rods themselves also form a V-shaped or parallel guide track. When the operator places the barrel, the outer wall of the barrel naturally slides along the support rod rollers and automatically centers, achieving rapid and accurate positioning of the barrel. This provides a prerequisite for the subsequent automatic engagement of the gears at the bottom and is an important component of the overall quick-assembly function.

[0019] Preferably, a flat tapered bearing is also provided between the bottom of the barrel and the support plate.

[0020] The flat tapered bearing can withstand both axial and radial loads simultaneously, further optimizing the stress state at the bottom of the barrel and transforming sliding friction into rolling friction. This not only makes the rotation smoother but also improves the durability and wear resistance of the support structure.

[0021] Preferably, the inlet / outlet is provided with a cover, and the cover is threadedly connected to the outer surface of the inlet / outlet.

[0022] Preferably, the bottom of the support structure is provided with multiple support bases, so that a frame space gap is formed between the support structure and the mounting plane.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention utilizes an inclined drum body driven by a drive mechanism to rotate, causing continuous three-dimensional tumbling of the catalyst powder inside. This achieves a fundamental shift from static stacking passivation to dynamic, full-contact passivation, significantly improving the efficiency and uniformity of passivation and mixing. The conical truncated inlet / outlet at the top of the drum effectively limits powder escape during operation and transfer. The circumferentially arranged lifting plates on the inner wall of the drum further enhance powder dispersion and convection, ensuring sufficient and rapid contact between the powder and the passivation atmosphere. The overall structure provides an integrated solution for efficient, uniform, and low-loss batch mixing and passivation of catalyst powder. Attached Figure Description

[0024] Figure 1 This is an exploded view of the structure of the device for batch mixing and passivation of catalyst powder according to the present invention.

[0025] Figure 2 This is a schematic diagram of the internal structure of the device for batch mixing and passivation of catalyst powder according to the present invention.

[0026] Figure 3 This is a state diagram illustrating the working process of the device for batch mixing and passivation of catalyst powder according to this invention.

[0027] Marked in the image: 1-Support structure, 2-Barrel body, 3-Support plate, 4-Inlet / outlet, 5-Lifting plate, 6-Drive motor, 7-Driving gear, 8-Driven gear, 9-Auxiliary gear, 10-Barrel support rod, 11-Roller, 12-Flat cone bearing, 13-Rotating plate, 14-Lid, 15-Support base. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0029] Example 1 This embodiment provides an apparatus for batch mixing and passivation of catalyst powder, such as... Figure 1 As shown, the device includes a support structure 1 and a barrel 2. The barrel 2 is inclinedly mounted on the support structure 1 and is used to hold catalyst powder. Specifically, the support structure 1 is provided with an inclined support plate 3, and the barrel 2 is rotatably connected to the support plate 3. By setting the inclined support plate 3, when the barrel 2 rotates, the catalyst powder not only rolls around the barrel 2, but also moves slowly along the inclined axial direction, forming a composite three-dimensional motion trajectory. This significantly enhances the mixing uniformity of the powder and promotes all-round contact between the powder and the passivation atmosphere.

[0030] More specifically, the angle between the support plate 3 and the horizontal plane is 15°-60°. This angle range has been experimentally optimized to ensure that the powder obtains sufficient axial movement component to achieve thorough mixing, while avoiding excessive angle that would cause the powder to accumulate at one end, affecting mixing efficiency and unloading smoothness. In this embodiment, preferably, the angle between the support plate 3 and the horizontal plane of the support structure is 45°.

[0031] In this preferred embodiment, such as Figure 2 As shown, the top of the barrel 2 is provided with an inlet / outlet 4, which is in the shape of a truncated cone, effectively limiting the escape of powder during operation and transfer. The inner wall of the barrel 2 is provided with multiple lifting plates 5 for tipping the powder; this further enhances the throwing and convection of the powder, ensuring sufficient and rapid contact between the powder and the passivating atmosphere. The barrel 2 is also equipped with a cover 14, which is externally threaded to the inlet / outlet 4 at the top of the barrel 2.

[0032] A drive mechanism, mounted on the support structure 1, drives the barrel 2 to rotate around its central axis. By setting the barrel 2 at an inclination and driving it to rotate by the drive mechanism, the catalyst powder inside the barrel undergoes continuous three-dimensional tumbling, achieving a fundamental transformation from static stacking passivation to dynamic full-contact passivation, significantly improving the efficiency and uniformity of passivation and mixing.

[0033] Specifically, in this embodiment, the driving mechanism includes a drive motor 6 and a drive gear 7, with the drive gear 7 connected to the output end of the drive motor 6; a driven gear 8 is disposed at the center of the bottom of the barrel 2; the drive gear 7 meshes with the driven gear 8. The use of a center gear transmission ensures direct and efficient power transmission with a constant transmission ratio, guaranteeing the stability and controllability of the barrel 2's rotational speed, thus providing a foundation for precise control of passivation process parameters.

[0034] More preferably, the support plate 3 is further provided with at least one auxiliary gear 9. Specifically, in this embodiment, two auxiliary gears 9 are included. The auxiliary gears 9 and the driving gear 7 cooperate with each other to limit the position of the driven gear 8 and assist the driven gear 8 in rotating. The driving gear 7 and the two auxiliary gears 9 are arranged in a triangle and mesh with and surround the driven gear 8 therein.

[0035] The addition of auxiliary gear 9 serves two purposes: firstly, it reduces the transmission load on the driving gear 7, improving the smoothness and reliability of the transmission; secondly, it provides additional radial constraint on the driven gear 8, effectively preventing swaying and vibration of the barrel 2 during rotation. The two auxiliary gears 9 and the driving gear 7 form a stable triangular support structure 1, making the force on the driven gear 8 more balanced, greatly improving the rigidity and coaxiality of the transmission system, reducing operating noise, and extending the service life of the gears.

[0036] This embodiment is specific, such as Figure 3 As shown, at least two barrel support rods 10 are provided on the support plate 3, and multiple rollers 11 are sleeved on each barrel support rod 10. The outer wall of the barrel 2 is supported on the rollers 11. The support rods and rollers 11 together form an auxiliary support system for the barrel 2, distributing the weight of the barrel 2 and the material to multiple support points, significantly reducing the load on the central gear shaft. The rolling friction of the rollers 11 significantly reduces the rotational resistance of the barrel 2, making the drive more effortless and the operation smoother.

[0037] Preferably, a planar tapered bearing 12 is further provided between the bottom of the barrel 2 and the support plate 3. Wherein, for example... Figure 1 As shown, the planar tapered bearing 12 is disposed in the central groove of the support plate 3, and a rotating plate 13 is also disposed on the upper part of the planar tapered bearing 12. The driven gear 8 at the bottom of the barrel 2 is supported on the rotating plate 13.

[0038] The barrel 2 is detachably connected to the support structure 1 through a gear combination design.

[0039] In a preferred embodiment, a cover 14 is provided on the inlet / outlet, and the cover 14 is threadedly connected to the outer surface of the inlet / outlet 4.

[0040] Preferably, the bottom of the support structure 1 is provided with a plurality of support bases 15, so that a frame space gap is formed between the support structure and the mounting plane.

[0041] The specific workflow includes: Pour the prepared catalyst powders A, B, and C from different batches / intervals into the container sequentially. Turn on the main drive motor switch, set the rotation parameters, and start the stirrer to begin mixing and passivation. Once mixing and passivation are complete, remove the container and pour the mixed and passivated catalyst directly into the container for the next process.

[0042] The technical solution of this utility model transforms static passivation into dynamic passivation, allowing the catalyst powder to fully contact the atmosphere, accelerating the passivation process and improving passivation efficiency. The mixing tank adopts a quick-release toothed structure and the inlet / outlet has a truncated conical design, which restricts the escape of catalyst powder. Due to the convenience and effectiveness of the above structure, the mixing tank itself can be directly used as a transfer container, which can effectively reduce the loss of catalyst powder during transfer and accelerate the uniform mixing of catalyst powder in different batches.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An apparatus for batch mixing and passivation of catalyst powder, characterized in that, The device includes a support structure (1); a barrel (2) which is inclinedly mounted on the support structure (1) and used to hold catalyst powder. The top of the barrel has an inlet / outlet (4) which is shaped like a truncated cone. The inner wall of the barrel (2) is provided with multiple lifting plates (5) for turning the powder. A drive mechanism is mounted on the support structure (1) and used to drive the barrel (2) to rotate around its central axis. An inclined support plate (3) is provided on the support structure (1), and the barrel (2) is rotatably connected to the support plate (3). The drive mechanism includes a drive motor (6) and a drive gear (7), and the drive gear (7) is connected to the output end of the drive motor (6). A driven gear (8) is provided at the bottom center of the barrel (2). The drive gear (7) meshes with the driven gear (8).

2. The apparatus for batch mixing and passivation of catalyst powder according to claim 1, characterized in that, The angle between the support plate (3) and the horizontal plane is 15°-60°.

3. The apparatus for batch mixing and passivation of catalyst powder according to claim 1, characterized in that, At least one auxiliary gear (9) is also provided on the support plate (3). The auxiliary gear (9) cooperates with the driving gear (7) and meshes with the driven gear (8).

4. The apparatus for batch mixing and passivation of catalyst powder according to claim 3, characterized in that, The number of auxiliary gears (9) is two. The driving gear (7) and the two auxiliary gears (9) are arranged in a triangle and the driven gear (8) is meshed and surrounded therein.

5. The apparatus for batch mixing and passivation of catalyst powder according to claim 1, characterized in that, At least two barrel support rods (10) are provided on the support plate (3), and multiple rollers (11) are sleeved on each barrel support rod (10). The outer wall of the barrel (2) is supported on the rollers (11).

6. The apparatus for batch mixing and passivation of catalyst powder according to claim 5, characterized in that, A planar tapered bearing (12) is also provided between the bottom of the barrel (2) and the support plate (3).

7. The apparatus for batch mixing and passivation of catalyst powder according to any one of claims 1-6, characterized in that, The inlet / outlet (4) is provided with a cover (14), and the cover (14) is threadedly connected to the outer surface of the inlet / outlet (4).

8. The apparatus for batch mixing and passivation of catalyst powder according to claim 7, characterized in that, The bottom of the support structure (1) is provided with multiple support bases (15), so that a frame space gap is formed between the support structure and the mounting plane.

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