Ethylene cracking furnace coking inhibitor preparation device

Abstract

The utility model discloses an ethylene cracking furnace coking inhibitor preparation device, which belongs to the technical field of inhibitor preparation, and comprises a stirring box, a protection box fixedly mounted at the top of the stirring box, a motor fixedly mounted on the inner side wall of the protection box, a rotating shaft fixedly connected to the output end of the motor, and two worm sections fixedly mounted on the outer side of the rotating shaft, the outer sides of the two worm sections are engaged with worm wheels, and the outer sides of the two worm wheels are fixedly provided with a stirring shaft and a rotating shaft respectively. Through mutual cooperation of the motor, the rotating shaft, the worm section, the worm gear, the rotating shaft, the stirring shaft, a first gear, a second gear, a rotating cylinder, a rotating frame, a first stirring plate and a second stirring plate, the second stirring plate and the first stirring plate start to perform bidirectional stirring on raw materials, so that the raw materials are mixed more uniformly in the stirring box; therefore, the active ingredients of the inhibitor are distributed consistently, the use effect of the inhibitor is greatly improved, and the practicability is wider.

Description

Technical Field

[0001] This utility model relates to the field of inhibitor preparation technology, and in particular to an apparatus for preparing coking inhibitors for ethylene cracking furnaces. Background Technology

[0002] The ethylene cracking furnace is a crucial core piece of equipment in ethylene production, consuming more than half of the energy. As a high-temperature component of the ethylene plant, the cracking furnace undergoes secondary reactions such as polymerization and condensation alongside the hydrocarbon cracking reaction. The combined effects of the catalytic action of the furnace tube wall metal and the free radical reactions in the feed material lead to coking on the furnace tube walls. Coking increases the tube wall thermal resistance, reduces the heat transfer coefficient, and causes elevated wall temperatures and localized overheating. Coking also reduces the inner diameter of the furnace tubes, increasing the liquid pressure drop and reducing throughput and ethylene yield. Furthermore, coking corrodes the furnace tubes, with coke seeping into them and causing carburization, reducing the mechanical properties of the tubes, affecting tube strength, and shortening tube lifespan. Coking increases energy consumption in ethylene production and necessitates frequent cleaning and tube replacement, reducing the operating cycle of the ethylene plant and significantly increasing production costs.

[0003] Existing ethylene cracking furnace coking inhibitor preparation devices generally use stirring blades rotating around a stirring shaft, which causes the raw materials to generate unidirectional swirling flow during stirring. This results in uneven mixing of the raw materials in the mixing tank, leading to inconsistent distribution of the effective components of the inhibitor and greatly reducing its effectiveness and practicality. Therefore, we propose an ethylene cracking furnace coking inhibitor preparation device to solve this problem. Utility Model Content

[0004] The purpose of this invention is to provide an apparatus for preparing coking inhibitors for ethylene cracking furnaces, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An apparatus for preparing a coking inhibitor for an ethylene cracking furnace includes: a stirring tank; a protective box fixedly installed on the top of the stirring tank; a motor fixedly installed on the inner side wall of the protective box; a rotating shaft fixedly connected to the output end of the motor; two worm gear segments fixedly installed on the outer side of the rotating shaft; worm wheels meshing with the outer sides of the two worm gear segments; a stirring shaft and a rotating shaft fixedly installed on the outer sides of the two worm wheels, respectively; a first gear fixedly installed on the outer side of the rotating shaft; a second gear fixedly installed on the outer side of the first gear; a rotating cylinder fixedly installed inside the second gear; a rotating frame fixedly installed at the bottom of the rotating cylinder; the rotating frame rotatably mounted on the outer side of the stirring shaft; multiple second stirring plates fixedly installed on both sides of the inner side of the rotating frame; and multiple first stirring plates fixedly installed on the outer side of the stirring shaft, with the multiple second stirring plates staggered from the multiple first stirring plates.

[0007] Preferably, four support plates are fixedly installed on the top of the mixing tank, and the same storage box is fixedly installed on the top of the four support plates. A filter box is interlocked inside the storage box. A pull ring is fixedly installed on the front side of the filter box. Insert rods are interlocked inside both sides of the filter box and the storage box. Fixing rings are fixedly installed on the outer sides of the two insert rods. Return springs are fixedly connected to the side of the two fixing rings that are close to each other. The side of the two return springs that are close to each other is fixedly connected to the outer side of the storage box.

[0008] Preferably, the outer side of the stirring shaft is rotatably mounted inside the rotating cylinder, and two limiting rings are fixedly mounted on the outer side of the rotating cylinder. The two limiting rings are respectively movably abutting against the outer and inner sides of the top of the mixing tank on their respective sides.

[0009] Preferably, the inlet of the storage tank is connected to a feeding hopper, both outlets of the storage tank are connected to feeding pipes, a control valve is provided on the outside of each of the two feeding pipes, and the outlets of the two feeding pipes are connected to the mixing tank.

[0010] Preferably, four support rods are fixedly installed at the bottom of the mixing tank, the discharge port of the mixing tank is connected to a discharge pipe, and a second control valve is provided on the outside of the discharge pipe.

[0011] Preferably, one end of the rotating shaft is rotatably mounted inside the side wall of the protective box, the top ends of both the rotating shaft and the stirring shaft are rotatably mounted inside the top of the protective box, and the bottom end of the rotating shaft is rotatably mounted inside the stirring box.

[0012] In this invention, an ethylene cracking furnace coking inhibitor preparation device is described. By starting a motor, a rotating shaft begins to rotate, which in turn drives a worm gear section to rotate, which in turn drives a meshing worm wheel to rotate, which in turn drives the rotating shaft and a stirring shaft to rotate. The rotation of the stirring shaft further drives a first stirring plate to rotate, which in turn drives a fixed first gear to rotate, which in turn drives a meshing second gear to rotate, which in turn drives a fixed rotating cylinder to rotate. The rotation of the rotating cylinder drives a rotating frame to rotate, which in turn drives a second stirring plate to rotate. This allows the second and first stirring plates to perform bidirectional stirring of the raw materials, resulting in more uniform mixing within the mixing chamber. This leads to a more consistent distribution of the inhibitor's effective components, significantly improving the inhibitor's effectiveness and broadening its applicability.

[0013] In this utility model, the ethylene cracking furnace coking inhibitor preparation device, when it is necessary to clean the filter box, pulls the insert rod to drive the insert rod away from the inside of the filter box and the storage box, so that the filter box and the storage box are no longer fixed. Then, by pulling the pull ring, the filter box is driven away from the inside of the storage box, which facilitates the cleaning of the storage box.

[0014] This utility model has a reasonable structural design. Through the cooperation between the motor, rotating shaft, worm gear section, worm wheel, rotating shaft, stirring shaft, first gear, second gear, rotating cylinder, rotating frame, first stirring plate and second stirring plate, the second stirring plate and the first stirring plate start to stir the raw materials in both directions. This makes the raw materials more evenly mixed in the mixing box, resulting in a consistent distribution of the effective components of the inhibitor, which greatly improves the effect of the inhibitor and makes it more widely applicable. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of a coking inhibitor preparation device for an ethylene cracking furnace proposed in this utility model;

[0016] Figure 2 This is a cross-sectional view of a coking inhibitor preparation device for an ethylene cracking furnace proposed in this utility model.

[0017] Figure 3 This is a schematic diagram of the rotating frame, the first stirring plate, and the second stirring plate proposed in this utility model.

[0018] Figure 4 for Figure 2 A magnified view of part A in the middle;

[0019] Figure 5 for Figure 2 A magnified view of part B in the middle section.

[0020] In the diagram: 1. Mixing tank; 2. Support rod; 3. Protective box; 4. Motor; 5. Rotating shaft; 6. Worm section; 7. Worm wheel; 8. Rotating shaft; 9. Mixing shaft; 10. Gear No. 1; 11. Gear No. 2; 12. Rotating cylinder; 13. Rotating frame; 14. Mixing plate No. 1; 15. Mixing plate No. 2; 16. Limiting ring; 17. Support plate; 18. Storage tank; 19. Feed hopper; 20. Filter box; 21. Pull ring; 22. Insert rod; 23. Fixing ring; 24. Return spring; 25. Feed pipe; 26. Control valve No. 1; 27. Discharge pipe; 28. Control valve No. 2. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figure 1-5 An apparatus for preparing a coking inhibitor for an ethylene cracking furnace includes: a stirring tank 1; a protective box 3 fixedly installed on the top of the stirring tank 1; a motor 4 fixedly installed on the inner side wall of the protective box 3; a rotating shaft 5 fixedly connected to the output end of the motor 4; two worm gear segments 6 fixedly installed on the outer side of the rotating shaft 5; worm wheels 7 meshing with the outer sides of the two worm gear segments 6; a stirring shaft 9 and a rotating shaft 8 fixedly installed on the outer sides of the two worm wheels 7, respectively; one end of the rotating shaft 5 rotatably mounted inside the side wall of the protective box 3; and the top ends of both the rotating shaft 8 and the stirring shaft 9 rotatably mounted on the inner top of the protective box 3. The bottom end of the shaft 8 is rotatably installed inside the mixing tank 1. A first gear 10 is fixedly installed on the outside of the rotating shaft 8. A second gear 11 is fixedly installed on the outside of the first gear 10. A rotating cylinder 12 is fixedly installed inside the second gear 11. A rotating frame 13 is fixedly installed at the bottom of the rotating cylinder 12. The rotating frame 13 is rotatably installed on the outside of the mixing shaft 9. Multiple second mixing plates 15 are fixedly installed on both sides of the inside of the rotating frame 13. Multiple first mixing plates 14 are fixedly installed on the outside of the mixing shaft 9. The multiple second mixing plates 15 are staggered from the multiple first mixing plates 14.

[0023] In this embodiment, four support plates 17 are fixedly installed on the top of the mixing tank 1, and the same storage tank 18 is fixedly installed on the top of the four support plates 17. A filter tank 20 is interlocked inside the storage tank 18. A pull ring 21 is fixedly installed on the front side of the filter tank 20. Insert rods 22 are interlocked inside both sides of the filter tank 20 and the storage tank 18. Fixing rings 23 are fixedly installed on the outer side of the two insert rods 22. A return spring 24 is fixedly connected to the side of the two fixing rings 23 that are close to each other. The side of the two return springs 24 that are close to each other is fixedly connected to the outer side of the storage tank 18, so as to facilitate the fixing of the storage tank 18 and the filter tank 20 through the insert rods 22.

[0024] In this embodiment, the outer side of the stirring shaft 9 is rotatably installed inside the rotating cylinder 12. Two limiting rings 16 are fixedly installed on the outer side of the rotating cylinder 12. The two limiting rings 16 are respectively movably abutting against the outer and inner sides of the top of the mixing box 1. The limiting rings 16 make the rotating cylinder 12 more stable when rotating and will not move due to gravity.

[0025] In this embodiment, the inlet of the storage tank 18 is connected to the feed hopper 19, and both outlets of the storage tank 18 are connected to the feed pipes 25. A control valve 26 is provided on the outside of each of the two feed pipes 25, and the outlets of the two feed pipes 25 are connected to the mixing tank 1, so as to facilitate the raw materials to be transported into the mixing tank 1 through the feed pipes 25.

[0026] In this embodiment, four support rods 2 are fixedly installed at the bottom of the mixing tank 1, and the discharge port of the mixing tank 1 is connected to the discharge pipe 27. A second control valve 28 is provided on the outside of the discharge pipe 27 to facilitate the delivery of the mixed inhibitor from the mixing tank 1 through the discharge pipe 27.

[0027] In this embodiment, during use, the raw materials are fed into the storage tank 18 via the feed hopper 19. Then, the first control valve 26 is opened, allowing the raw materials in the storage tank 18 to be filtered through the filter box 20 and then fed into the mixing tank 1 via the feed pipe 25. The motor 4 is then started, causing the rotating shaft 5 to rotate, which in turn causes the worm gear section 6 to rotate, which in turn causes the meshing worm wheel 7 to rotate, which in turn causes the rotating shaft 8 and the mixing shaft 9 to rotate. Furthermore, the rotation of the mixing shaft 9 causes the first mixing plate 14 to rotate, and the rotating shaft 8 causes the fixed first gear 10 to rotate, which in turn causes the meshing second gear 11 to rotate, which in turn causes the fixed rotating cylinder 12 to rotate. The rotation of the rotating cylinder 12 then causes the rotating frame to rotate. The 13 valve starts rotating, further driving the second mixing plate 15 to rotate, causing the second mixing plate 15 and the first mixing plate 14 to start bidirectional mixing of the raw materials, making the raw materials more evenly mixed in the mixing box 1, resulting in a more consistent distribution of the active ingredients of the inhibitor, thus greatly improving the effect of the inhibitor and making it more practical. The mixed raw materials are discharged through the discharge pipe 27 by opening the second control valve 28. At the same time, when it is necessary to clean the filter box 20, the insert rod 22 is pulled to disengage it from the interior of the filter box 20 and the storage box 18, so that the filter box 20 and the storage box 18 are no longer fixed. Then, by pulling the pull ring 21, the filter box 20 is disengaged from the interior of the storage box 18, thus facilitating the cleaning of the storage box 18.

[0028] The foregoing has provided a detailed description of the coking inhibitor preparation device for an ethylene cracking furnace provided by this utility model. Specific embodiments have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A device for preparing a coking inhibitor for an ethylene cracking furnace, characterized in that, include: A mixing tank (1) is provided, with a protective box (3) fixedly installed on the top of the mixing tank (1). A motor (4) is fixedly installed on the inner side wall of the protective box (3). A rotating shaft (5) is fixedly connected to the output end of the motor (4). Two worm gear segments (6) are fixedly installed on the outer side of the rotating shaft (5). Worm wheels (7) are meshed on the outer side of each of the two worm gear segments (6). A mixing shaft (9) and a rotating shaft (8) are fixedly installed on the outer side of the two worm wheels (7), respectively. A first gear (10) is fixedly installed on the outer side of the rotating shaft (8). A second gear (11) is fixedly installed on the outside of (10). A rotating cylinder (12) is fixedly installed inside the second gear (11). A rotating frame (13) is fixedly installed at the bottom of the rotating cylinder (12). The rotating frame (13) is rotatably installed on the outside of the stirring shaft (9). Multiple second stirring plates (15) are fixedly installed on both sides of the inside of the rotating frame (13). Multiple first stirring plates (14) are fixedly installed on the outside of the stirring shaft (9). The multiple second stirring plates (15) and the multiple first stirring plates (14) are staggered.

2. The apparatus for preparing a coking inhibitor for an ethylene cracking furnace according to claim 1, characterized in that, Four support plates (17) are fixedly installed on the top of the mixing tank (1). The same storage tank (18) is fixedly installed on the top of the four support plates (17). A filter box (20) is interlocked inside the storage tank (18). A pull ring (21) is fixedly installed on the front side of the filter box (20). Insert rods (22) are interlocked inside both sides of the filter box (20) and the storage tank (18). Fixing rings (23) are fixedly installed on the outer side of the two insert rods (22). A return spring (24) is fixedly connected to the side of the two fixing rings (23) that are close to each other. The side of the two return springs (24) that are close to each other is fixedly connected to the outer side of the storage tank (18).

3. The apparatus for preparing a coking inhibitor for an ethylene cracking furnace according to claim 1, characterized in that, The outer side of the stirring shaft (9) is rotatably mounted inside the rotating cylinder (12). Two limiting rings (16) are fixedly mounted on the outer side of the rotating cylinder (12). The two limiting rings (16) are respectively movably abutting against the outer and inner sides of the top of the stirring box (1).

4. The apparatus for preparing a coking inhibitor for an ethylene cracking furnace according to claim 2, characterized in that, The inlet of the storage tank (18) is connected to the feed hopper (19), and the two outlets of the storage tank (18) are connected to the feed pipe (25). A control valve (26) is provided on the outside of the two feed pipes (25), and the outlets of the two feed pipes (25) are connected to the mixing tank (1).

5. The apparatus for preparing a coking inhibitor for an ethylene cracking furnace according to claim 1, characterized in that, Four support rods (2) are fixedly installed at the bottom of the mixing tank (1). The discharge port of the mixing tank (1) is connected to the discharge pipe (27). A second control valve (28) is provided on the outside of the discharge pipe (27).

6. The apparatus for preparing a coking inhibitor for an ethylene cracking furnace according to claim 1, characterized in that, One end of the rotating shaft (5) is rotatably installed inside the side wall of the protective box (3), the top ends of the rotating shaft (8) and the stirring shaft (9) are rotatably installed inside the top of the protective box (3), and the bottom end of the rotating shaft (8) is rotatably installed inside the stirring box (1).

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