A catalyst collection and conveying device at the bottom of the riser of a catalytic cracking unit.

Abstract

This utility model discloses a catalyst collection and conveying device at the bottom of the riser pipe of a catalytic cracking unit, belonging to the field of petrochemical technology. It includes a frame platform with a first riser pipe and a second riser pipe mounted on it. A collection hopper is fixedly connected to the bottom of both the first and second riser pipes. In this utility model, fallen catalyst dust is collected by the collection hoppers at the bottom of the first and second riser pipes. The collected catalyst dust is then driven to the inner cavity of a storage tank via a blower, a first electrically controlled valve, an exhaust pipe, a second electrically controlled valve, an upper guide pipe, and a lower guide pipe. The collection hoppers and closed conveying pipes prevent catalyst powder from floating around due to wind during discharge, effectively controlling dust pollution in the unit area, improving the working environment, and protecting equipment and personnel health.

Description

Technical Field

[0001] This utility model relates to the field of petrochemical technology, and more specifically, to a catalyst collection and conveying device at the bottom of the riser of a catalytic cracking unit. Background Technology

[0002] In the petrochemical industry, catalytic cracking units are important processing equipment. In the initial stage of operation of large-scale catalytic cracking units (such as 4 million tons / year), before the catalyst fluidization, catalyst leakage due to regeneration slide valves often leads to catalyst accumulation at the bottom of the first and second riser pipes. The bottom of the first riser pipe is located on the second-level platform of the frame, and the bottom of the second riser pipe is located on the sixth-level platform of the frame.

[0003] In existing technologies, the treatment of catalyst accumulation at the bottom of the riser typically involves on-site discharge. This means the accumulated catalyst is directly discharged onto a platform and then manually transported down from the platform. This method has significant drawbacks. First, catalyst powder floats everywhere under wind, causing dust pollution throughout the entire unit area, affecting the working environment and potentially posing risks to equipment and personnel health. Second, transporting the accumulated catalyst down from different floors requires substantial manpower and resources, resulting in low efficiency and increased production costs. Therefore, we propose a catalyst collection and conveying device for the bottom of the riser in a catalytic cracking unit. Utility Model Content

[0004] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a catalyst collection and conveying device at the bottom of the riser of a catalytic cracking device.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A catalyst collection and conveying device at the bottom of the riser of a catalytic cracking unit includes a frame platform. A first riser and a second riser are provided on the frame platform. A collection hopper is fixedly sleeved at the bottom end of both the first and second risers. A collection pipe is fixedly connected to the bottom end of each of the two collection hoppers. An exhaust pipe is fixedly connected to the bottom end of each of the two collection pipes. A first electrically controlled valve is fixedly installed at one end of each of the two exhaust pipes. A blower is fixedly connected to the end of each of the two first electrically controlled valves. A second electrically controlled valve is fixedly connected to the other end of each of the two exhaust pipes. An upper guide pipe is fixedly connected to the end of one second electrically controlled valve, and a lower guide pipe is fixedly connected to the end of the other second electrically controlled valve. A collection mechanism is provided on the side of the frame platform, and a sealing mechanism is provided on each of the two collection hoppers.

[0007] As a preferred embodiment of this utility model, the material collection mechanism includes a storage tank disposed on the side of the frame platform. A tank cover is threadedly installed on the top of the storage tank, and a filter screen is disposed on the inner side of the tank cover. A lower plug is threadedly installed on the bottom of the storage tank, and the bottom ends of the upper guide pipe and the lower guide pipe are respectively fixedly sleeved into the inner cavity of the storage tank.

[0008] As a preferred embodiment of this utility model, the sealing mechanism includes a servo motor fixedly installed on the side of the collection hopper and a rotating rod rotatably connected to the inner cavity of the collection hopper. A sealing plate is fixedly connected to the side of the rotating rod, and the side of the sealing plate is in contact with the inner wall of the collection hopper. The output shaft of the servo motor is connected to the end of the rotating rod through a coupling.

[0009] As a preferred embodiment of the present invention, a gas supply pipe is provided at the bottom of the inner cavity of the first lifting pipe, the end of the gas supply pipe penetrates the inner cavity of the collecting hopper and is fixedly sleeved to the outside of the collecting hopper, a catalyst addition pipe is provided on the side of the first lifting pipe, and a gas filling pipe is provided on the side of the first lifting pipe.

[0010] As a preferred embodiment of this utility model, a support frame is fixedly sleeved on the outside of the storage tank, and multiple support legs are fixedly connected to the bottom surface of the support frame.

[0011] As a preferred embodiment of this utility model, the two hair dryers are respectively fixedly installed on the second and sixth layers of the frame platform.

[0012] The advantages of this utility model are:

[0013] In this invention, fallen catalyst dust is collected by collection hoppers at the bottom of the first and second lifting pipes. The collected catalyst dust is then driven into the inner cavity of the storage tank via a blower, a first electrically controlled valve, an exhaust pipe, a second electrically controlled valve, an upper guide pipe, and a lower guide pipe. The collection hoppers and enclosed conveying pipes prevent catalyst powder from floating around due to wind during discharge, effectively controlling dust pollution in the plant area, improving the working environment, and protecting equipment and personnel health. Simultaneously, this device achieves mechanized transport of the catalyst from the bottom of the first and second lifting pipes to the storage tank, eliminating the need for manual handling from the platform, significantly reducing manpower input, lowering labor intensity, saving material resources consumed by manual transport, improving work efficiency, and reducing production costs. Furthermore, the device has a reasonable structural design, utilizing existing frame structures for installation without large-scale modifications, making installation convenient, operation simple, and highly reliable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is an exploded view of the overall structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the collection hopper of this utility model;

[0017] Figure 4 This is an exploded view of the material collection mechanism of this utility model;

[0018] Figure 5 This is a cross-sectional schematic diagram of the collection bucket of this utility model.

[0019] Explanation of the labels in the diagram:

[0020] 1. Frame platform; 2. First lifting pipe; 3. Second lifting pipe; 4. Collection hopper; 5. Material collection pipe; 6. Exhaust pipe; 7. First electric control valve; 8. Blower; 9. Second electric control valve; 10. Sealing mechanism; 11. Material collection mechanism; 12. Upper guide pipe; 13. Lower guide pipe; 14. Storage tank; 15. Tank cover; 16. Filter screen; 17. Lower plug cover; 18. Support frame; 19. Support leg; 20. Servo motor; 21. Rotating rod; 22. Sealing plate; 23. Air supply pipe; 24. Catalyst addition pipe; 25. Gas filling pipe. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example:

[0025] Please see Figure 1-5 A catalyst collection and conveying device at the bottom of the riser of a catalytic cracking unit includes a frame platform 1, a first riser 2 and a second riser 3 on the frame platform 1, a collection hopper 4 fixedly sleeved at the bottom of both the first riser 2 and the second riser 3, a collection pipe 5 fixedly connected to the bottom of each of the two collection hoppers 4, an exhaust pipe 6 fixedly connected to the bottom of each of the two collection pipes 5, a first electrically controlled valve 7 fixedly installed at one end of each of the two exhaust pipes 6, a blower 8 fixedly connected to the end of each of the two first electrically controlled valves 7, a second electrically controlled valve 9 fixedly connected to the other end of each of the two exhaust pipes 6, an upper guide pipe 12 fixedly connected to the end of one second electrically controlled valve 9, a lower guide pipe 13 fixedly connected to the end of the other second electrically controlled valve 9, a collection mechanism 11 on the side of the frame platform 1, and a sealing mechanism 10 on each of the two collection hoppers 4.

[0026] In this embodiment, the device is controlled by a controller in the petroleum catalytic cracking unit, which is the prior art. In addition, the first riser 2 can be set on the second platform on the frame platform 1, and the second riser 3 can be set on the sixth platform on the frame platform 1. The positions of the first riser 2 and the second riser 3 can be set according to the actual situation.

[0027] For details, please refer to Figure 1 and Figure 4 The material collection mechanism 11 includes a storage tank 14 located on the side of the frame platform 1. A tank cover 15 is threadedly installed on the top of the storage tank 14. A filter screen 16 is provided on the inner side of the tank cover 15. A lower plug 17 is threadedly installed on the bottom of the storage tank 14. The bottom ends of the upper guide pipe 12 and the lower guide pipe 13 are respectively fixedly sleeved into the inner cavity of the storage tank 14.

[0028] In this embodiment, the catalyst in the storage tank 14 can be discharged by removing the lower plug 17, and the gas can be discharged through the filter screen 16 so that the catalyst dust can be stored in the inner cavity of the storage tank 14.

[0029] For details, please refer to Figure 2 and Figure 5 The sealing mechanism 10 includes a servo motor 20 fixedly installed on the side of the collection hopper 4 and a rotating rod 21 rotatably connected to the inner cavity of the collection hopper 4. A sealing plate 22 is fixedly connected to the side of the rotating rod 21. The side of the sealing plate 22 fits against the inner wall of the collection hopper 4. The output shaft of the servo motor 20 is connected to the end of the rotating rod 21 through a coupling.

[0030] In this embodiment, when it is necessary to discharge the catalyst from the collection pipe 5, the top of the inner cavity of the collection hopper 4 is sealed by the sealing plate 22.

[0031] For details, please refer to Figure 3 A gas supply pipe 23 is provided at the bottom of the inner cavity of the first riser pipe 2. The end of the gas supply pipe 23 passes through the inner cavity of the collection hopper 4 and is fixedly sleeved to the outside of the collection hopper 4. A catalyst addition pipe 24 and a gas filling pipe 25 are provided on the side of the first riser pipe 2.

[0032] In this embodiment, gas is introduced into the first riser pipe 2 through the gas supply pipe 23, a hot catalyst is introduced into the inner cavity of the first riser pipe 2 through the catalyst addition pipe 24, and additional gas is introduced into the inner cavity of the first riser pipe 2 through multiple gas addition pipes 25.

[0033] For details, please refer to Figure 4 A support frame 18 is fixedly sleeved on the outside of the storage tank 14, and multiple support legs 19 are fixedly connected to the bottom surface of the support frame 18.

[0034] In this embodiment, the storage tank 14 is supported by the cooperation of the support frame 18 and the support leg 19.

[0035] For details, please refer to Figures 1 to 3 Two hair dryers 8 are fixedly installed on the second and sixth layer platforms of the frame platform 1, respectively.

[0036] Working principle: In use, firstly, turn on the two servo motors 20, which drive the rotating rod 21 and the sealing plate 22 to rotate, so that the sealing plate 22 is in a vertical position, allowing the catalyst falling from the first lifting pipe 2 and the second lifting pipe 3 to enter the inner cavity of the collecting hopper 4 and be stored in the inner cavity of the collecting pipe 5. Then, start the servo motors 20 at regular intervals to drive the rotating rod 21 and the sealing plate 22 to rotate 90 degrees again, using the sealing plate 22 to seal the top of the inner cavity of the collecting hopper 4, and open the first solenoid valve 7 and the second solenoid valve 8. With the second electric control valve 9 activated, the blower 8 blows air from the first electric control valve 7 into the inner cavity of the exhaust pipe 6. The airflow guides the catalyst in the inner cavity of the exhaust pipe 6 through the two second electric control valves 9, the upper guide pipe 12, and the lower guide pipe 13 into the inner cavity of the storage tank 14. Then, the catalyst powder entering the inner cavity of the storage tank 14 is filtered by the filter screen 16, and the gas is discharged through the filter screen 16. The catalyst is stored in the inner cavity of the storage tank 14. Finally, the lower plug 17 at the bottom of the storage tank 14 is removed to discharge the catalyst from the inner cavity of the storage tank 14.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A catalytic cracking unit riser bottom catalyst collection conveyor comprising a frame platform (1) characterized by: The frame platform (1) is provided with a first lifting pipe (2) and a second lifting pipe (3). The bottom ends of the first lifting pipe (2) and the second lifting pipe (3) are fixedly connected to a collection hopper (4). The bottom ends of the two collection hoppers (4) are respectively fixedly connected to a material collection pipe (5). The bottom ends of the two material collection pipes (5) are respectively fixedly connected to an exhaust pipe (6). One end of the two exhaust pipes (6) is fixedly installed with a first electric control valve (7). The ends of the two first electric control valves (7) are fixedly connected to a blower (8). The other end of the two exhaust pipes (6) is fixedly connected to a second electric control valve (9). The end of one second electric control valve (9) is fixedly connected to an upper guide pipe (12). The end of the other second electric control valve (9) is fixedly connected to a lower guide pipe (13). The side of the frame platform (1) is provided with a material collection mechanism (11). The two collection hoppers (4) are each provided with a sealing mechanism (10).

2. A catalytic cracking unit riser bottom catalyst collection and transfer apparatus according to claim 1 wherein: The material collection mechanism (11) includes a storage tank (14) located on the side of the frame platform (1). A tank cover (15) is threaded onto the top of the storage tank (14). A filter screen (16) is provided on the inner side of the tank cover (15). A lower plug cover (17) is threaded onto the bottom of the storage tank (14). The bottom ends of the upper guide pipe (12) and the lower guide pipe (13) are respectively fixedly sleeved into the inner cavity of the storage tank (14).

3. A catalytic cracking unit riser bottom catalyst collection and transfer apparatus according to claim 1 wherein: The sealing mechanism (10) includes a servo motor (20) fixedly installed on the side of the collection hopper (4) and a rotating rod (21) rotatably connected to the inner cavity of the collection hopper (4). A sealing plate (22) is fixedly connected to the side of the rotating rod (21). The side of the sealing plate (22) is in contact with the inner wall of the collection hopper (4). The output shaft of the servo motor (20) is connected to the end of the rotating rod (21) through a coupling.

4. A catalytic cracking unit riser bottom catalyst collection and transfer apparatus according to claim 1 wherein: A gas supply pipe (23) is provided at the bottom of the inner cavity of the first lifting pipe (2). The end of the gas supply pipe (23) passes through the inner cavity of the collecting hopper (4) and is fixedly sleeved to the outside of the collecting hopper (4). A catalyst addition pipe (24) is provided on the side of the first lifting pipe (2), and a gas filling pipe (25) is provided on the side of the first lifting pipe (2).

5. A catalytic cracking unit riser bottom catalyst collection and transfer apparatus according to claim 2 wherein: A support frame (18) is fixedly sleeved on the outside of the storage tank (14), and multiple support legs (19) are fixedly connected to the bottom surface of the support frame (18).

6. A catalytic cracking unit riser bottom catalyst collection and transport apparatus as defined in claim 1 wherein: The two hair dryers (8) are respectively fixedly installed on the second and sixth layers of the frame platform (1).

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