Reforming catalyst lifter

Abstract

The utility model discloses a reforming catalyst lifter, and particularly relates to a reforming catalyst lifter in the field of petroleum refining, which comprises a cavity, the bottom of the cavity is communicated with a primary lifting gas inlet, the left side of the upper part of the cavity is communicated with a catalyst inlet, and the right side of the catalyst inlet is communicated with a catalyst outlet. And the primary lifting gas inlet is communicated with the catalyst outlet through a primary lifting gas outlet, and the primary lifting gas outlet is provided with a nozzle. According to the utility model, the whole high-efficiency airflow ejected from the primary lifting air outlet can be effectively dispersed into a plurality of bundles of airflow, the pulsating airflow is changed into stable airflow, the speed difference between catalysts is smaller, the lifting is more stable, and the efficiency is improved. Therefore, the problems of catalyst breakage caused by high-speed collision of the catalyst and pipeline thinning and high catalyst loss caused thereby are avoided.

Description

Technical Field

[0001] The utility model relates to a reforming catalyst lifter, in particular to a reforming catalyst lifter in the field of petroleum refining. Background Art

[0002] Catalytic reforming is a key process in the secondary processing of petroleum. It involves a catalytic reaction aimed at producing high-octane gasoline components and aromatics. Its efficiency and stability are directly related to the yield and quality of key products such as high-octane gasoline and aromatics. In this process, the healthy condition and efficient circulation of the reforming catalyst are the cornerstones for ensuring process continuity and product quality.

[0003] Existing reforming catalyst lifters operate based on the Venturi effect, effectively utilizing the low-pressure zone created by high-speed airflow to draw in and accelerate catalyst particles. The primary lift gas outlet within the Venturi tube is designed as a straight pipe (e.g., a ￠30*2 gauge). The drawn catalyst, driven by the high-speed airflow, enters the lift flow duct. Due to the uneven force distribution across the entire airflow, the catalyst is subjected to uneven forces. This unevenness exacerbates collisions between catalyst particles and friction between the duct wall. Particularly in areas with sharp changes in airflow direction, such as bends in the lift duct, the kinetic energy of the catalyst particles is dramatically amplified, creating a "blowout" effect. This high-intensity impact not only directly breaks up catalyst particles but also accelerates wear at the outer bends of the duct, reducing duct wall thickness and increasing the risk of leaks. Catalyst breakage not only wastes raw materials and increases processing costs, but more seriously, these tiny catalyst fragments can migrate throughout the circulation system, eventually clogging critical components such as the regenerator and the Johnson screen in the chamber. Clogging the Johnson screen directly increases the pressure drop within the chamber, impacting the efficiency and stability of the entire catalytic reforming system.

[0004] Therefore, there is an urgent need for a reforming catalyst lifter that can avoid the problems of catalyst breakage caused by high-speed collision of catalysts and the resulting pipeline thinning and high catalyst loss. Utility Model Content

[0005] The purpose of the present utility model is to provide a reforming catalyst lifter, in which a nozzle is arranged at the original primary lifting gas outlet to effectively disperse the entire airflow into multiple airflows, ensuring that each airflow can maintain sufficient power to effectively carry and accelerate catalyst particles, and avoid the problem of high-speed collision of catalyst particles caused by excessive concentration of airflow, so as to overcome the shortcomings of the prior art such as catalyst breakage caused by high-speed collision of catalysts and the resulting pipeline thinning and high catalyst loss.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0007] A reforming catalyst lifter comprises a cavity, wherein a primary lift gas inlet is connected to the bottom of the cavity, a catalyst inlet is connected to the left side of the upper part of the cavity, and a catalyst outlet is connected to the right side of the catalyst inlet, so as to facilitate the smooth entry of catalyst particles into the cavity. The primary lift gas inlet and the catalyst outlet are connected through the primary lift gas outlet, and the primary lift gas outlet is provided with a nozzle. The catalyst enters from the catalyst inlet and falls to the bottom of the cavity. The high-speed airflow enters from the primary lifting air inlet. The inhaled catalyst particles enter the primary lifting air outlet driven by the high-speed airflow. However, the airflow entering the primary lifting air inlet is a whole stream, which makes it impossible for the catalyst particles to be evenly distributed. The nozzle set at the primary lifting air outlet can effectively disperse the whole airflow into multiple airflows. Due to the uniform distribution of the multiple airflows, the catalyst particles brought in are also dispersed again under the action of the airflow. In this process, the catalyst particles are not only more evenly stressed, but also the collision intensity between each other is greatly reduced, thereby effectively reducing the catalyst breakage rate. At the same time, due to the uniformity of the airflow distribution, the movement trajectory of the catalyst particles in the cavity also becomes more stable and controllable, further reducing their impact and wear on the inner wall of the pipe.

[0008] Furthermore, the primary lift gas outlet includes a cone and a cylinder, the end of the cone with a larger diameter is connected to the primary lift gas inlet, the end of the cone with a smaller diameter is connected to one end of the cylinder, and the other end of the cylinder is provided with a nozzle and connected to the catalyst outlet.

[0009] Furthermore, the diameter of the cone is larger than the diameter of the primary lifting gas inlet. When the catalyst particles enter the cavity from the catalyst inlet, the catalyst particles will naturally slide to the bottom of the cavity and gradually approach the cone area in the process. At this time, the high-speed airflow is sprayed into the cone through the primary lifting gas inlet, which increases the kinetic energy of the high-speed airflow and attracts the catalyst particles. The catalyst particles are engulfed by the airflow and climb upward along the inner wall of the cone until they reach the connection between the primary lifting gas outlet and the primary lifting gas inlet, and are discharged from the catalyst outlet through the nozzle set at the primary lifting gas outlet.

[0010] Furthermore, the primary lift gas outlet and the nozzle are connected by welding.

[0011] Furthermore, a thermometer port is provided on the left side of the cavity for detecting the temperature inside the cavity.

[0012] Furthermore, baffles are provided on both sides of the cavity, and an interlayer is formed between the cavity and the baffles. A secondary lifting air inlet is provided on the right side of the cavity, one side of the interlayer is connected to the secondary lifting air inlet, and the other side is connected to the secondary lifting air outlet, providing a second chance for catalyst particles that were not successfully driven by the high-speed airflow during the first lifting process; although the catalyst entering from the catalyst inlet will be driven by the high-speed airflow of the first lifting air inlet, some catalyst particles will not be driven by the high-speed airflow and will fall to the bottom of the cavity due to excessive catalyst particle content. The high-speed airflow enters from the secondary lifting air inlet, and is blocked by the baffle, and only moves in the interlayer. The high-speed airflow goes out from the secondary lifting air outlet, and blows the catalyst particles that fall to the bottom of the cavity to a certain height, so that the catalyst particles at the bottom can be driven by the high-speed airflow of the first lifting air inlet, and will not accumulate at the bottom of the cavity.

[0013] Furthermore, a plurality of connecting plates are provided between the inner wall of the cavity and the baffle, so as to ensure that the baffle is stably fixed on both sides of the cavity, and the interlayer formed by the baffle and the cavity is sufficiently stable.

[0014] Furthermore, the nozzle end face is a flat nozzle.

[0015] Furthermore, the nozzle end face is a spherical nozzle.

[0016] Furthermore, the nozzle end face is a multi-edge nozzle.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] The utility model provides a reforming catalyst lifter, which is provided with a nozzle at the primary lifting gas outlet, and can effectively disperse the entire high-efficiency airflow ejected from the primary lifting gas outlet into multiple small airflow beams evenly, which not only effectively reduces the kinetic energy of the pulsed airflow, but also significantly removes the pulsating pressure waves in the airflow, so that the airflow pulsation component that may originally cause instability is greatly weakened. As the airflow is stabilized, its ability to carry catalyst particles is also significantly improved. The uniform distribution of multiple airflows ensures that each airflow can fully contact the catalyst particles and be redispersed under their action. This dispersion effect not only greatly reduces the speed difference between the catalyst particles, but also makes the catalyst flow more stable and orderly during the entire lifting process. This stable airflow and catalyst flow state effectively avoids the problem of crushing caused by high-speed collision of the catalyst during the traditional lifting process. Under the support of the stable airflow, the catalyst particles can contact and move with each other in a softer manner, thereby greatly reducing the crushing rate. At the same time, due to the reduction of airflow pulsation, the impact and wear on the pipeline are also significantly reduced, extending the service life of the equipment and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an overall schematic diagram of a reforming catalyst lifter in an embodiment of the present utility model.

[0020] Figure 2 This is a schematic diagram of a primary lifting gas outlet of a reforming catalyst lifter in an embodiment of the present utility model.

[0021] In the figure, 1. primary lifting gas inlet; 2. secondary lifting gas inlet; 3. thermometer port; 4. primary lifting gas outlet; 5. catalyst inlet; 6. catalyst outlet; 7. cavity; 8. nozzle; 9. cone; 10. cylinder; 11. baffle; 12. connecting plate; 13. secondary lifting gas outlet. DETAILED DESCRIPTION

[0022] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 creative efforts should fall within the scope of protection of the present invention.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] The utility model provides a reforming catalyst lifter, which can effectively disperse the entire high-efficiency airflow ejected from a single lifting gas outlet into multiple airflows, effectively reducing the kinetic energy of the pulsed airflow, removing the airflow pulsation pressure wave, thereby reducing the pulsating component of the compressed airflow, and changing the pulsating airflow into a smooth airflow. Due to the uniform distribution of the multiple airflows, the brought-in catalyst is also dispersed again under the action of the airflow, the speed difference between the catalysts is smaller, and the lifting is more stable, thereby avoiding the catalyst breakage caused by high-speed collision of the catalysts and the resulting pipeline thinning and high catalyst loss problems.

[0025] See Figures 1 to 2 A reforming catalyst lifter includes a cavity 7, wherein a primary lift gas inlet 1 is connected to the bottom of the cavity 7, a catalyst inlet 5 is connected to the left side of the upper portion of the cavity 7, and a catalyst outlet 6 is connected to the right side of the catalyst inlet 5. The primary lift gas inlet 1 and the catalyst outlet 6 are connected through a primary lift gas outlet 4, and the primary lift gas outlet 4 is provided with a nozzle 8. The primary lift gas outlet 4 and the nozzle 8 are connected by welding. Traditional lifters often cause uneven force on the catalyst due to the concentration of airflow, which in turn causes a series of problems. This lifter successfully disperses the original high-speed airflow into multiple small and uniform airflows by installing a nozzle at the primary lift gas outlet. The catalyst particles are not only more evenly stressed, but also the collision intensity between each other is greatly reduced, thereby effectively reducing the catalyst breakage rate. At the same time, due to the uniformity of the airflow distribution, the movement trajectory of the catalyst particles in the cavity also becomes more stable and controllable, further reducing their impact and wear on the inner wall of the pipe. The entire lifting process is not only efficient and stable, but also greatly extends the service life of the equipment and reduces maintenance costs.

[0026] A thermometer port 3 is provided on the left side of the cavity 7 for detecting the temperature in the cavity 7; the primary lift gas outlet 4 includes a cone 9 and a cylinder 10, the end of the cone 9 with a larger diameter is connected to the primary lift gas inlet 1, and the end of the cone 9 with a smaller diameter is connected to one end of the cylinder 10, and the other end of the cylinder 10 is provided with a nozzle 8 and communicated with the catalyst outlet 6. The diameter of the cone 9 is larger than the diameter of the primary lift gas inlet 1, and the high-speed airflow is sprayed into the cone 9 through the primary lift gas inlet 1, thereby increasing the kinetic energy of the high-speed airflow and attracting catalyst particles. The catalyst particles are entrained by the airflow and climb upward along the inner wall of the cone 9 until they reach the connection between the primary lift gas outlet 4 and the primary lift gas inlet 1, and are discharged from the catalyst outlet 6 through the nozzle 8 provided at the primary lift gas outlet 4;

[0027] In some preferred embodiments of the present invention, baffles 11 are provided on both sides of the cavity 7, and an interlayer is formed between the cavity 7 and the baffles 11. A secondary lifting air inlet 2 is provided on the right side of the cavity 7, one side of the interlayer is connected to the secondary lifting air inlet 2, and the other side is connected to the secondary lifting air outlet 13; a second chance is provided for those catalyst particles that are not successfully driven by the high-speed airflow during the first lifting process. Although the catalyst entering from the catalyst inlet 5 will be driven by the high-speed airflow of the first lifting air inlet 1, some catalyst particles will not be driven by the high-speed airflow and fall to the bottom of the cavity 7 due to excessive catalyst particle content. The high-speed airflow enters from the secondary lifting air inlet 13, and is blocked by the baffle 11, and only moves in the interlayer. The high-speed airflow goes out from the secondary lifting air outlet 13, and blows the catalyst particles that fall to the bottom of the cavity 7 to a certain height, so that the catalyst particles at the bottom can be driven by the high-speed airflow of the first lifting air inlet 1, and will not accumulate at the bottom of the cavity. Multiple connecting plates 12 are positioned between the inner wall of the cavity 7 and the baffle 11. These connecting plates 12 are evenly spaced at regular intervals, forming a stable support network. Each connecting plate 12 is tightly connected to the inner wall of the cavity 7 and the baffle 11 via high-strength fasteners, ensuring that the baffle 11 remains stable in position, preventing it from shaking or shifting, even when impacted by airflow or collision with catalyst particles.

[0028] In some preferred embodiments of the present invention, the end surface of the nozzle 8 is a flat nozzle.

[0029] In some preferred embodiments of the present invention, the end surface of the nozzle 8 is a spherical nozzle.

[0030] In some preferred embodiments of the present invention, the end face of the nozzle 8 is a multi-edge nozzle.

[0031] Throughout this specification, references to terms such as "some embodiments," "optionally," "further," or "some examples" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0032] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A reforming catalyst booster, characterized in that: The invention comprises a cavity (7), wherein the bottom of the cavity (7) is connected to a primary lift gas inlet (1), the left side of the upper portion of the cavity (7) is connected to a catalyst inlet (5), the right side of the catalyst inlet (5) is connected to a catalyst outlet (6), the primary lift gas inlet (1) and the catalyst outlet (6) are connected via a primary lift gas outlet (4), and the primary lift gas outlet (4) is provided with a nozzle (8).

2. A reforming catalyst booster according to claim 1, characterized in that: The primary lift gas outlet (4) comprises a cone (9) and a cylinder (10), wherein the end of the cone (9) with a larger diameter is connected to the primary lift gas inlet (1), and the end of the cone (9) with a smaller diameter is connected to one end of the cylinder (10), and the other end of the cylinder (10) is provided with a nozzle (8) and communicated with the catalyst outlet (6).

3. A reforming catalyst booster according to claim 2, characterized in that: The diameter of the cone (9) is larger than the diameter of the primary lift gas inlet (1).

4. The reforming catalyst booster according to claim 1, characterized in that: The primary lifting gas outlet (4) and the nozzle (8) are connected by welding.

5. The reforming catalyst booster according to claim 1, characterized in that: A thermometer port (3) is provided on the left side of the cavity (7).

6. The reforming catalyst booster according to claim 1, characterized in that: Baffles (11) are provided on both sides of the cavity (7), and a sandwich is formed between the cavity (7) and the baffles (11). The right side of the cavity (7) is connected to a secondary lifting gas inlet (2). One side of the sandwich is connected to the secondary lifting gas inlet (2), and the other side is connected to the secondary lifting gas outlet (13).

7. The reforming catalyst booster according to claim 6, characterized in that: A plurality of connecting plates (12) are provided between the inner wall of the cavity (7) and the baffle (11).

8. The reforming catalyst booster according to claim 1, characterized in that: The end surface of the nozzle (8) is a flat nozzle.

9. The reforming catalyst booster according to claim 1, characterized in that: The end surface of the nozzle (8) is a spherical nozzle.

10. The reforming catalyst booster according to claim 1, characterized in that: The end face of the nozzle (8) is a multi-edge shaped nozzle.

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