Anti-coking process and automatic decoking equipment for oil refining equipment

Abstract

The application discloses an anti-coking process and automatic decoking equipment for oiling equipment, which comprises a burner, wherein the burner is provided with a plurality of cracking device housings which are fixedly connected; a cracking device inner rotating drum is rotatably arranged in the cracking device housing; one end of the cracking device inner rotating drum is coaxially and rotatably connected with a feeding hopper; the feeding hopper is fixedly connected with a hydraulic cylinder at an end away from the cracking device inner rotating drum; the driving end of the hydraulic cylinder is slidably arranged in the feeding hopper and is fixedly connected with a push plate at the end; the push plate is slidably arranged in the feeding hopper and is fixedly connected with a movable rod at one end; the movable rod is slidably clamped in a supporting cylinder at an end away from the feeding hopper; the supporting cylinder is coaxially and rotatably arranged in the cracking device inner rotating drum; and the two sides of the supporting cylinder are rotatably connected with decoking assemblies. The residual heat of the cracking device is utilized to mix and preheat the air sucked by the burner, so that the combustion temperature difference of the burner is reduced, the temperature of the burner is kept stable, the temperature difference in the cracking device is reduced, and the anti-coking effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of anti-coking technology, specifically to an anti-coking process and automatic coking removal equipment for oiling equipment. Background Technology

[0002] With the accelerating pace of life, the use of plastic and rubber products is increasing. However, the recycling of waste plastic bags and waste rubber products is lagging behind, causing pollution in many places. As environmental pollution becomes more serious, people's awareness of environmental protection is also constantly improving. The pyrolysis of waste rubber and plastic can be further processed to produce gasoline, diesel and other products. This not only provides a good solution for the treatment of industrial waste such as waste tires and plastics generated in modern society, but also provides a new solution for improving the situation of resource depletion and energy shortage.

[0003] Existing methods typically employ pyrolysis via a pyrolysis furnace to achieve the aforementioned oil-based chemical treatment. The pyrolysis temperature is generally around 450℃. However, because the heating temperature must be higher than the pyrolysis temperature, coking occurs on the inner wall of the pyrolysis furnace under these conditions. Furthermore, the coking phenomenon worsens with increasing heating temperature. Coking prevents heat transfer to the material within the pyrolysis furnace, reducing thermal efficiency. Due to this impeded heat transfer, the hot air temperature must be increased to maintain the pyrolysis temperature. This not only increases fuel consumption but also significantly reduces the pyrolysis furnace's lifespan due to the increased heating temperature. Therefore, we propose an anti-coking process and an automatic coking removal device for oil-based chemical treatment equipment to address these problems. Summary of the Invention

[0004] The purpose of this invention is to provide an anti-coking process and an automatic coking removal device for oil and chemical equipment, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an anti-coking process for oil-based chemical equipment, which mixes the hot air discharged during the pyrolysis process with the air drawn into the burner, heats the air drawn into the burner, reduces the combustion temperature difference of the burner, maintains the temperature stability of the burner, and reduces the temperature difference inside the pyrolysis unit to achieve anti-coking.

[0006] An automatic coking removal device for an anti-coking process in oil and chemical equipment is also provided, including a burner. The burner has multiple burners, all of which are fixedly connected to a pyrolysis unit housing. A pyrolysis unit inner rotating cylinder is rotatably installed inside the pyrolysis unit housing. One end of the pyrolysis unit inner rotating cylinder is coaxially rotatably connected to a feed hopper. The end of the feed hopper away from the pyrolysis unit inner rotating cylinder is fixedly connected to a hydraulic cylinder. The drive end of the hydraulic cylinder slides into the feed hopper and is fixedly connected to a push plate at its end. The push plate is slidably disposed in the feed hopper and is fixedly connected to a movable rod at one end. The side of the movable rod away from the feed hopper is slidably engaged in a support cylinder. The support cylinder is coaxially rotatably installed inside the pyrolysis unit inner rotating cylinder. Coking removal components are rotatably connected to both sides of the support cylinder.

[0007] Preferably, a plurality of hot air outlet pipes are fixedly connected to the top of the pyrolyzer shell, a central pipe is fixedly connected to the top of the hot air outlet pipes, a plurality of regenerating pipes are fixedly connected to the central pipe, and the end of the regenerating pipe away from the central pipe is fixedly connected to the air inlet of the burner.

[0008] Preferably, the regenerator pipe has an L-shaped structure, and the hot air outlet pipe is connected to the inner rotating cylinder of the pyrolyzer.

[0009] Preferably, the bottom of the hydraulic cylinder and the feed hopper are both fixedly connected to a base, and the two ends of the support cylinder are respectively rotatably connected to brackets, which are fixedly installed at both ends inside the rotating cylinder of the pyrolyzer.

[0010] Preferably, the desiccant removal assembly includes a rotating ring, a cylindrical slider, a protrusion, a connecting rod, an arc-shaped connecting rod, a scraper, and a support portion. The rotating ring is rotatably sleeved on both sides of the support cylinder. The protrusions are fixedly connected to the outer walls of both sides of the rotating ring. The protrusions are respectively hinged to one end of the connecting rod. The other end of the connecting rod is hinged to one end of the arc-shaped connecting rod. The other end of the arc-shaped connecting rod is respectively hinged to both ends of the support portion. The support cylinder is fixedly sleeved in the middle of the support portion. The scraper is fixedly connected to the side of the arc-shaped connecting rod near the connecting rod. The cylindrical sliders are fixedly connected to the inner walls of both sides of the rotating ring.

[0011] Preferably, the support cylinder has sliding openings on both sides, the cylindrical slider is slidably disposed in the sliding openings, the outer walls of both sides of the movable rod are respectively provided with guide grooves, one end of the guide groove is connected to an arc groove, the arc groove is opened outside the movable rod, and the cylindrical slider is slidably engaged with the guide groove.

[0012] Preferably, the guide groove and the arc groove have the same opening size and depth, the protrusions are symmetrically arranged on both sides of the rotating ring, and the connecting rods on both sides of the rotating ring are arranged in parallel.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: by utilizing the waste heat of the pyrolysis unit to mix and preheat the air drawn into the burner, the combustion temperature difference of the burner is reduced, the temperature of the burner is kept stable, and the temperature difference inside the pyrolysis unit is reduced to prevent coking; the coking removal component performs coking removal work during hydraulic feeding, cleaning the coking inside the pyrolysis unit, thereby improving the reaction efficiency, reducing the load on the equipment, increasing the service life of the equipment, reducing production costs, and reducing energy consumption. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 This is a schematic cross-sectional view of the present invention;

[0016] Figure 3 This is a schematic diagram of the structure of the desiccant removal component in this invention;

[0017] Figure 4 This is a schematic diagram of a partial structure of the movable rod in this invention.

[0018] In the diagram: 1. Pyrolysis shell; 2. Pyrolysis inner rotating cylinder; 3. Burner; 4. Regenerator pipe; 5. Centralized pipe; 6. Hot air outlet pipe; 7. Feed hopper; 8. Hydraulic cylinder; 9. Coke removal assembly; 91. Rotary ring; 92. Cylindrical slider; 93. Protrusion; 94. Connecting rod; 95. Arc-shaped connecting rod; 96. Scraper; 97. Support; 10. Base; 11. Support cylinder; 12. Movable rod; 121. Guide groove; 122. Arc-shaped groove; 13. Support. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1

[0021] Reference Figure 1 , 2 This is the first embodiment of the present invention. This embodiment provides an anti-coking process for oil-based equipment. The hot air discharged during the pyrolysis process is mixed with the air drawn into the burner 3. The air drawn into the burner 3 is mixed and heated to reduce the combustion temperature difference of the burner 3, maintain the temperature stability of the burner 3, and reduce the temperature difference inside the pyrolysis unit to achieve anti-coking.

[0022] An automatic coking removal device for an anti-coking process in oil chemical equipment is also provided, including a burner 3. The burner 3 has multiple burners, all of which are fixedly connected to a pyrolysis shell 1. A pyrolysis inner rotating cylinder 2 is rotatably installed inside the pyrolysis shell 1. One end of the pyrolysis inner rotating cylinder 2 is coaxially rotatably connected to a feed hopper 7. The end of the feed hopper 7 away from the pyrolysis inner rotating cylinder 2 is fixedly connected to a hydraulic cylinder 8. The driving end of the hydraulic cylinder 8 slides into the feed hopper 7 and is fixedly connected to a push plate at its end. The push plate is slidably disposed in the feed hopper 7 and one end of the push plate is fixedly connected to a movable rod 12. The side of the movable rod 12 away from the feed hopper 7 is slidably engaged in a support cylinder 11. The support cylinder 11 is coaxially rotatably installed inside the pyrolysis inner rotating cylinder 2. Coking removal components 9 are rotatably connected to both sides of the support cylinder 11.

[0023] During feeding, coke removal can be achieved. When the hydraulic cylinder 8 extends, it drives the movable rod 12 fixed to the push plate to move. The movable rod 12 slides inside the support cylinder 11, and the cylindrical slider 92 of the coke removal assembly 9 slides inside the guide groove 121 of the movable rod 12. After the movable rod 12 moves, the arc groove 122 moves to the position of the cylindrical slider 92. After the movable rod 12 continues to move linearly, the arc groove 122 drives the cylindrical slider 92 to slide along the arc groove 122. The cylindrical slider 92 then drives the rotating ring 91 to rotate and move by an angle. At the same time, the movable rod 12 slides and engages with the support cylinder 11. One end of the movable rod 12 is fixed to the flange of the movable rod 12 by bolts, fixing the movable rod 12 on the push plate. The push plate is fixedly connected to the hydraulic cylinder 8. Therefore, the engagement of the movable rod 12 makes the support... The cylinder 11 is fixed and will not rotate with the inner rotating cylinder 2 of the pyrolyzer. After the rotating ring 91 rotates, it drives the fixed protrusion 93 to rotate. The protrusion 93 drives the connecting rod 94 to swing. The protrusion 93 drives the hinged arc-shaped connecting rod 95 to move. The arc-shaped connecting rod 95 then drives the fixed scraper 96 to move towards the inner wall of the inner rotating cylinder 2 of the pyrolyzer. When the push plate moves to the end of the feed hopper 7, the movable rod 12 moves linearly to the appropriate position. The scraper 96 then contacts the inner wall of the inner rotating cylinder 2 of the pyrolyzer. At this time, the rotation of the inner rotating cylinder 2 of the pyrolyzer, together with the scraper 96, realizes the coking work. When the hydraulic cylinder 8 retracts, the movable rod 12 moves linearly in the opposite direction. The movable rod 12 drives the rotating ring 91 of the coking removal component 9 to reverse. The rotating ring 91 drives the scraper 96 to disengage from the contact with the inner wall of the inner rotating cylinder 2 of the pyrolyzer, so that the scraper 96 does not affect the oil production.

[0024] Example 2

[0025] Reference Figure 1-4 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment. Specifically, a plurality of hot air outlet pipes 6 are fixedly connected to the top of the pyrolyzer shell 1. A central pipe 5 is fixedly connected to the top of the hot air outlet pipes 6. A plurality of regenerating pipes 4 are fixedly connected to the central pipe 5. The end of the regenerating pipe 4 away from the central pipe 5 is fixedly connected to the air inlet of the burner 3.

[0026] The high-temperature hot air generated during the pyrolysis operation enters the hot air outlet pipe 6, and then the high-temperature hot air is concentrated in the central pipe 5. When the burner 3 is working, the negative pressure generated at the air inlet, together with the heat recovery pipe 4, draws the high-temperature hot air in the central pipe 5. The hot air is mixed into the air inlet of the burner 3, thereby mixing and heating the intake air, reducing the combustion temperature difference of the burner 3, maintaining the temperature stability of the burner 3, and reducing the temperature difference inside the pyrolysis unit to prevent coking.

[0027] Furthermore, the heat recovery pipe 4 has an L-shaped structure, and the hot air outlet pipe 6 is connected to the inner rotating cylinder 2 of the pyrolyzer, so that the high-temperature heat inside the hot air chamber of the pyrolyzer can enter the hot air outlet pipe 6 to realize the recovery and utilization of heat.

[0028] Specifically, the bottom of the hydraulic cylinder 8 and the feed hopper 7 are both fixedly connected to the base 10, and the two ends of the support cylinder 11 are respectively rotatably connected to the bracket 13. The bracket 13 is fixedly installed at both ends inside the rotating cylinder 2 of the pyrolyzer. The bracket 13 supports the support cylinder 11 and ensures the stability of the support cylinder 11 in the rotating cylinder 2 of the pyrolyzer.

[0029] Specifically, the desiccant removal assembly 9 includes a rotating ring 91, a cylindrical slider 92, a protrusion 93, a connecting rod 94, an arc-shaped connecting rod 95, a scraper 96, and a support part 97. The rotating ring 91 is rotatably sleeved on both sides of the support cylinder 11. The protrusion 93 is fixedly connected to the outer walls of both sides of the rotating ring 91. The protrusion 93 is hinged to one end of the connecting rod 94, and the other end of the connecting rod 94 is hinged to one end of the arc-shaped connecting rod 95. The other end of the arc-shaped connecting rod 95 is hinged to both ends of the support part 97. The support cylinder 11 is fixedly sleeved in the middle of the support part 97. The scraper 96 is fixedly connected to the side of the arc-shaped connecting rod 95 near the connecting rod 94. The cylindrical slider 92 is fixedly connected to the inner walls of both sides of the rotating ring 91.

[0030] When the movable rod 12 slides inside the support cylinder 11, the cylindrical slider 92 of the coke removal component 9 slides inside the guide groove 121 of the movable rod 12. After the movable rod 12 moves, the arc groove 122 moves to the position of the cylindrical slider 92. After the movable rod 12 continues to move linearly, the arc groove 122 drives the cylindrical slider 92 to slide along the arc groove 122. The cylindrical slider 92 then drives the rotating ring 91 to rotate and move by an angle. After the rotating ring 91 rotates, it drives the fixed protrusion 93 to rotate. The protrusion 93 drives the connecting rod 94 to swing. The protrusion 93 drives the hinged arc connecting rod 95 to move. The arc connecting rod 95 then drives the fixed scraper 96 to move towards the inner wall of the inner rotating cylinder 2 of the pyrolyzer. When the push plate moves to the end of the feed hopper 7, the movable rod 12 moves linearly to the appropriate position, and the scraper 96 then contacts the inner wall of the inner rotating cylinder 2 of the pyrolyzer. At this time, the rotation of the inner rotating cylinder 2 of the pyrolyzer, in conjunction with the scraper 96, realizes the coke removal work.

[0031] Furthermore, sliding openings are provided on both sides of the support cylinder 11, and the cylindrical slider 92 is slidably disposed in the sliding openings. The outer walls on both sides of the movable rod 12 are respectively provided with guide grooves 121. One end of the guide groove 121 is connected to an arc groove 122. The arc groove 122 is opened outside the movable rod 12. The cylindrical slider 92 slides and engages with the guide groove 121. When the arc groove 122 moves linearly and drives the cylindrical slider 92 to rotate, the cylindrical slider 92 moves in the sliding opening, thereby driving the fixed rotating ring 91 to rotate outside the support cylinder 11, and then cooperating with the protrusion 93 to drive the connecting rod 94 to move.

[0032] Furthermore, the guide groove 121 and the arc groove 122 have the same opening size and depth. The protrusions 93 are symmetrically arranged on both sides of the rotating ring 91. The connecting rods 94 on both sides of the rotating ring 91 are arranged in parallel. The parallel arrangement ensures that when the protrusions 93 rotate in a circle, they drive the hinged connecting rods 94 to move synchronously, ensuring the consistency of the rotation of the arc connecting rods 95 on both sides. This ensures that the scrapers 96 on both sides of the support cylinder 11 can simultaneously contact the inner walls of both sides of the rotating cylinder 2 inside the pyrolyzer.

[0033] Example 3

[0034] Reference Figure 1-4This is the third embodiment of the present invention. Based on the previous two embodiments, during production, the crushed rubber waste is fed into the feed hopper 7. The hydraulic cylinder 8 operates, driving the pusher plate fixed to the drive end to move. The pusher plate pushes the rubber waste in the feed hopper 7 into the rotating drum 2 inside the pyrolyzer for pyrolysis. The high-temperature hot air generated during pyrolysis enters the hot air outlet pipe 6, and then the high-temperature hot air is concentrated in the central pipe 5. When the burner 3 is burning, the negative pressure generated at the air inlet, combined with the heat recovery pipe 4, extracts the high-temperature hot air from the central pipe 5. The hot air mixes into the air inlet of the burner 3, thereby mixing and heating the intake air, reducing the combustion temperature difference of the burner 3, maintaining the temperature stability of the burner 3, and reducing the temperature difference inside the pyrolyzer to prevent coking. When the hydraulic cylinder 8 extends, it drives the movable rod 12 fixed to the pusher plate to move. The movable rod 12 slides within the support cylinder 11, and the cylindrical slider 92 of the coking removal component 9 slides within the guide groove 121 of the movable rod 12. After the movement, the arc-shaped groove 122 moves to the position of the cylindrical slider 92. After the movable rod 12 continues to move linearly, the arc-shaped groove 122 drives the cylindrical slider 92 to slide along the arc-shaped groove 122. The cylindrical slider 92 then drives the rotating ring 91 to rotate and move by an angle. After the rotating ring 91 rotates, it drives the fixed protrusion 93 to rotate. The protrusion 93 drives the connecting rod 94 to swing. The protrusion 93 drives the hinged arc-shaped connecting rod 95 to move. The arc-shaped connecting rod 95 then drives the fixed scraper 96 to move towards the inner rotating cylinder 2 of the pyrolyzer. As the push plate moves to the end of the feed hopper 7, the movable rod 12 moves linearly to the appropriate position, and the scraper 96 then contacts the inner wall of the inner rotating cylinder 2 of the pyrolyzer. At this time, the rotation of the inner rotating cylinder 2 of the pyrolyzer, in conjunction with the scraper 96, achieves the coking removal work. When the hydraulic cylinder 8 retracts, the movable rod 12 moves linearly in the opposite direction. The movable rod 12 drives the rotating ring 91 of the coking removal component 9 to reverse, and the rotating ring 91 drives the scraper 96 to disengage from the contact with the inner wall of the inner rotating cylinder 2 of the pyrolyzer, so that the scraper 96 does not affect the oil production.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic descaling device for an anti-coking process in oil-based chemical equipment, comprising a burner (3), characterized in that, The anti-coking process of the oil-chemical equipment includes the following steps: mixing the hot air discharged from the pyrolysis process with the air drawn into the burner (3), heating the air drawn into the burner (3), reducing the combustion temperature difference of the burner (3), maintaining the temperature stability of the burner (3), and reducing the temperature difference inside the pyrolysis unit to achieve anti-coking. The burner (3) is provided with multiple burners, all of which are fixedly connected to the pyrolysis shell (1). The pyrolysis inner rotating cylinder (2) is rotatably installed inside the pyrolysis shell (1). One end of the pyrolysis inner rotating cylinder (2) is coaxially rotatably connected to the feed hopper (7). The end of the feed hopper (7) away from the pyrolysis inner rotating cylinder (2) is fixedly connected to the hydraulic cylinder (8). The driving end of the hydraulic cylinder (8) slides into the feed hopper (7) and is fixedly connected to the end of the push plate. The push plate is slidably installed in the feed hopper (7) and one end of the push plate is fixedly connected to the movable rod (12). The side of the movable rod (12) away from the feed hopper (7) is slidably engaged in the support cylinder (11). The support cylinder (11) is coaxially rotatably installed in the pyrolysis inner rotating cylinder (2). The two sides of the support cylinder (11) are respectively rotatably connected to the coke removal assembly (9). The desiccant removal assembly (9) includes a rotating ring (91), a cylindrical slider (92), a protrusion (93), a connecting rod (94), an arc-shaped connecting rod (95), a scraper (96), and a support part (97). The rotating ring (91) is rotatably sleeved on both sides of the support cylinder (11). The protrusion (93) is fixedly connected to the outer walls of both sides of the rotating ring (91). The protrusion (93) is hinged to one end of the connecting rod (94). The other end of the connecting rod (94) is hinged to one end of the arc-shaped connecting rod (95). The other end of the arc-shaped connecting rod (95) is hinged to both ends of the support part (97). The support cylinder (11) is fixedly sleeved in the middle of the support part (97). The scraper (96) is fixedly connected to the side of the arc-shaped connecting rod (95) near the connecting rod (94). The cylindrical slider (92) is fixedly connected to the inner walls of both sides of the rotating ring (91). The support cylinder (11) has sliding openings on both sides, and the cylindrical slider (92) is slidably disposed in the sliding openings. The outer walls of both sides of the movable rod (12) are respectively provided with guide grooves (121). One end of the guide groove (121) is connected to an arc groove (122). The arc groove (122) is opened outside the movable rod (12), and the cylindrical slider (92) is slidably engaged with the guide groove (121).

2. The automatic coking removal equipment for the anti-coking process of oil-chemical equipment according to claim 1, characterized in that: The top of the pyrolyzer shell (1) is fixedly connected to several hot air outlet pipes (6), the top end of the hot air outlet pipes (6) is fixedly connected to a central pipe (5), the central pipe (5) is fixedly connected to several regenerating pipes (4), and the end of the regenerating pipe (4) away from the central pipe (5) is fixedly connected to the air inlet of the burner (3).

3. The automatic coking removal equipment for the anti-coking process of oil-chemical equipment according to claim 2, characterized in that: The regenerator pipe (4) has an L-shaped structure, and the hot air outlet pipe (6) is connected to the inner rotating cylinder (2) of the pyrolyzer.

4. The automatic coking removal equipment for the anti-coking process of oil-chemical equipment according to claim 1, characterized in that: The bottom of the hydraulic cylinder (8) and the feed hopper (7) are both fixedly connected to the base (10), and the two ends of the support cylinder (11) are respectively rotatably connected to the bracket (13), and the bracket (13) is fixedly installed at both ends inside the rotating cylinder (2) of the pyrolyzer.

5. The automatic coking removal equipment for the anti-coking process of oil-chemical equipment according to claim 1, characterized in that: The guide groove (121) and the arc groove (122) have the same opening size and depth. The protrusions (93) are symmetrically arranged on both sides of the rotating ring (91). The connecting rods (94) on both sides of the rotating ring (91) are arranged in parallel.

Images