Normal pressure furnace and tower combined processing equipment for waste mineral oil recycling

Abstract

The utility model discloses a kind of waste mineral oil regeneration and utilization's atmospheric furnace and tower combination processing equipment, comprising: atmospheric column, and the fractionating column being set to one side of atmospheric column;Atmospheric column includes heating furnace, the circulation component being set to the top of heating furnace, and the several feed pipes being set to the inside of heating furnace, feed pipe is connected by connecting component, connecting component is used to the quick replacement disassembly of feed pipe;Shunt mechanism includes tower body, and the feed hole being set to one end of tower body;Feed hole is connected with feed pipe, for the fractionating operation of conveying waste mineral oil in tower body;Tower body top is connected with condenser;Heating furnace includes radiation chamber and the hearth being set to the bottom of radiation chamber, feed pipe is set to radiation chamber, further improve the regeneration efficiency of waste mineral oil, and optimize oil product output quality, realize more environmental protection and efficient resource utilization.

Description

Technical Field

[0001] This utility model relates to a waste mineral oil treatment device, and more particularly to a combined atmospheric pressure furnace and tower treatment device for the recycling of waste mineral oil. Background Technology

[0002] In the field of waste mineral oil recycling technology, the combination of atmospheric pressure heating furnace and tower has long been regarded as the core process for efficient treatment, and its operational efficiency directly affects the quality and resource utilization rate of recycled oil. Traditional equipment typically uses a straight pipe or a simple curved single-pass flow channel design for the radiant section of the heating furnace. The waste mineral oil flows through a short path with uneven heat distribution, posing a significant bottleneck, especially when processing high-viscosity, complex-component waste oil. The waste oil has a limited residence time in the radiant chamber, and some oil products are transported to the tower before fully absorbing heat and reaching the target decomposition temperature. This incomplete thermal conversion leads to insufficient thermal cracking of high-temperature heavy components within the tower, resulting in a low yield of light fuel oil. Furthermore, incompletely decomposed gums and asphaltenes easily polymerize within the tower, forming coking byproducts. This not only reduces the purity of the recycled base oil but also exacerbates the risk of tower blockage and increases equipment maintenance costs.

[0003] In industry practice, the radiant section piping layout of conventional heating furnaces makes it difficult to fully utilize the furnace's thermal field. Straight pipes or single-bend structures allow oil to flow only through a localized area of ​​the radiant chamber, preventing the effective transfer of residual heat from the high-temperature flue gas in the later stages of the furnace to the oil. Furthermore, uneven flow velocity distribution further causes temperature stratification of the oil film within the pipes; oil near the pipe wall is prone to overheating and coking, while the central fluid experiences insufficient temperature rise, creating a vicious cycle. This structural defect makes it difficult to guarantee the uniformity and depth of heat treatment of the oil, directly affecting the accuracy of subsequent fractionation. Therefore, it is urgent to optimize the radiant section heat transfer channel design to extend the waste oil thermal reaction time while ensuring a safe flow velocity, promoting uniform molecular decomposition and improving the overall system's separation efficiency and product quality from the source. Thus, it is necessary to improve an existing atmospheric pressure furnace and tower combination processing equipment for waste mineral oil recycling to solve the above problems. Summary of the Invention

[0004] This invention overcomes the shortcomings of the prior art and provides a combined atmospheric pressure furnace and tower processing equipment for the recycling of waste mineral oil, aiming to solve the problems in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a combined atmospheric pressure furnace and tower processing equipment for the recycling of waste mineral oil, comprising: an atmospheric pressure tower, and a fractionation tower disposed on one side of the atmospheric pressure tower;

[0006] The atmospheric pressure tower includes a heating furnace, a circulation assembly located at the top of the heating furnace, and several conveying pipes located inside the heating furnace. The conveying pipes are connected by a connecting assembly, which is used for quick replacement and disassembly of the conveying pipes.

[0007] The diversion mechanism includes a tower body and a feed port located at one end of the tower body; the feed port is connected to a feed pipe for transporting waste mineral oil into the tower body for fractionation operations; the top of the tower body is connected to a condenser.

[0008] In a preferred embodiment of the present invention, the heating furnace includes a radiant chamber and a furnace chamber disposed at the bottom of the radiant chamber. The furnace chamber is used to place fuel for combustion to generate heat radiation sources and transmit them to the radiant chamber. A material conveying pipe is disposed in the radiant chamber.

[0009] In a preferred embodiment of this utility model, the circulation component is disposed at the top of the radiation chamber, the top of the radiation chamber is provided with a ventilation opening, and a shield is provided at the ventilation opening.

[0010] In a preferred embodiment of the present invention, the circulation component includes a fixed frame, a motor fixedly connected to the fixed frame, and fan blades fixedly connected to the motor, the fan blades being used to accelerate the flow of heat radiation.

[0011] In a preferred embodiment of the present invention, the feeding pipe includes an inlet pipe and an outlet pipe, which are connected and both are installed in the radiant heating chamber.

[0012] In a preferred embodiment of this utility model, a plurality of feed pipes are provided, the feed pipes are bent into a U-shape and uniformly attached to the inner wall of the radiant chamber, and the feed pipes adjacent to the connecting components are connected.

[0013] In a preferred embodiment of this utility model, a connecting hole is provided at the end of the feed pipe, and a retaining shaft is slidably disposed in the connecting hole, with both ends of the retaining shaft being hemispherical.

[0014] In a preferred embodiment of the present invention, the connecting assembly includes a fixing plate and a connecting plate, which are symmetrically fixedly connected to the radiant chamber, and positioning holes are respectively provided on the fixing plate and the connecting plate.

[0015] In a preferred embodiment of this utility model, a limiting tube is fixedly connected to the connecting hole on the connecting plate, a slip ring is slidably connected to the limiting tube, rectangular sliding holes are evenly opened on the inner circumference of the limiting tube, a top plate is slidably connected to the sliding hole, the bottom plane of the top plate is flush with the inner circumferential surface of the inner wall of the limiting tube, a spring is provided in the hollow inner wall of the limiting tube, and the slip ring, the top plate and the spring are fixedly connected in this way.

[0016] In a preferred embodiment of the present invention, the connecting component further includes a bent pipe with a fixing groove on its outer wall. The fixing groove is hemispherical and the bent pipe is in transition fit with the limiting ring. The fixing groove can fit with the retaining shaft.

[0017] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0018] (1) This utility model provides a combined atmospheric pressure furnace and tower processing equipment for the recycling of waste mineral oil. By bending the feed pipe into a U-shape and fitting it to the inner wall of the radiant chamber to form an S-shaped flow channel, and the discharge pipe adopts a spiral layout located in the middle of the radiant chamber, this double-layer path greatly extends the residence time of waste mineral oil in the high-temperature radiant chamber and covers the entire area of ​​the radiant chamber, so that the waste mineral oil can fully absorb heat to reach the required temperature. This avoids the situation where some oil is not fully heated before being fed into the tower due to large flow rate or short heating time, ensuring uniform decomposition of oil components. Compared with the prior art, this further improves the recycling efficiency of waste mineral oil and optimizes the output quality of oil, achieving more environmentally friendly and efficient resource utilization.

[0019] (2) This utility model provides a combined atmospheric pressure furnace and tower processing equipment for the recycling of waste mineral oil. Through the connection component, the two ends of the hemispherical clamping shaft fit into the bending pipe fixing groove. After pulling the slip ring to compress the spring, the clamping shaft can retract into the connection hole to facilitate the insertion of the bending pipe. When the slip ring is released, the spring returns to its original position and pushes the clamping shaft to lock the fixing groove. This ensures the modular quick insertion and removal of the conveying pipe unit, and enables maintenance personnel to easily disassemble the conveying pipe to remove coke or replace oxidized and corroded pipe sections. This greatly reduces the pipeline maintenance time. Compared with the conveying pipe fixed by welding or bolts in the prior art, it further reduces the maintenance cost and extends the service cycle of key components through quick replacement, thereby enhancing the sustainable operation performance of the entire recycling system.

[0020] (3) This utility model provides a combination of atmospheric pressure furnace and tower for the recycling of waste mineral oil. The fan blades are driven by a motor to rotate, guiding hot air to flow upward from the bottom of the radiation chamber and diffuse back due to the shielding, forming a circulating airflow. This effectively eliminates the problem of excessive temperature difference between the upper and lower parts caused by insufficient natural convection in traditional heating systems. This makes the waste mineral oil uniformly heated when it flows in the conveying pipe, avoiding the situation where solid coke adheres to the inner wall of the pipe due to the low temperature at the top, which would block the flow and reduce the fractionation efficiency and quality of the tower. Compared with the prior art, this further improves the stability of equipment operation, reduces the frequency of shutdown for cleaning, and extends the life of the conveying pipe, thereby improving the overall reliability and economic benefits of the waste mineral oil treatment system. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0022] Figure 1 This is a perspective structural diagram of a preferred embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the atmospheric pressure tower structure of a preferred embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the connection between the bent pipe and the conveying pipe in a preferred embodiment of this utility model;

[0025] Figure 4 This is a schematic diagram of the pipe bending cross-section mechanism of a preferred embodiment of the present invention;

[0026] Figure 5 This is a preferred embodiment of the present invention. Figure 4 A magnified structural diagram of part A;

[0027] In the diagram: 1. Atmospheric pressure tower; 2. Fractionating tower; 3. Heating furnace; 4. Circulation assembly; 5. Feed pipe; 6. Tower body; 7. Feed port; 8. Radiation chamber; 9. Furnace chamber; 10. Vent; 11. Fixing frame; 12. Motor; 13. Fan blade; 15. Shaft clamp; 16. Fixing plate; 17. Connecting plate; 18. Limiting tube; 19. Slip ring; 20. Sliding hole; 21. Top plate; 22. Spring; 23. Bend. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0029] As shown in the figure, a combined atmospheric pressure furnace and tower processing equipment for the recycling of waste mineral oil includes: an atmospheric pressure tower 1, and a fractionation tower 2 disposed on one side of the atmospheric pressure tower 1.

[0030] The atmospheric pressure tower 1 includes a heating furnace 3, a circulation assembly 4 disposed on the top of the heating furnace 3, and several conveying pipes 5 disposed inside the heating furnace 3. The conveying pipes 5 are connected by a connecting assembly, which is used to quickly replace and disassemble the conveying pipes 5.

[0031] The diversion mechanism includes a tower body 6 and a feed port 7 located at one end of the tower body 6; the feed port 7 is connected to the feed pipe 5 and is used to carry out fractionation operations on the waste mineral oil transported in the tower body 6; the top of the tower body 6 is connected to the condenser.

[0032] It should be noted that this equipment combines an atmospheric pressure furnace with the tower body 6. Waste mineral oil is fed into the atmospheric pressure furnace through the conveying pipe 5, and its interior is heated by the heating furnace 3 beforehand. The circulation component 4 accelerates the flow of hot air, ensuring uniform heating inside. This avoids a large temperature difference between the top and bottom, which could cause the waste mineral oil to become too cold at the top and form solid coke on the inner wall of the conveying pipe 5, blocking the flow of waste mineral oil. Furthermore, the even distribution of the conveying pipe 5 within the heating furnace 3 extends the heating time, thus ensuring the heating of the waste mineral oil. At the same time, the conveying pipe 5 is connected and fixed to the heating furnace 3 using connecting components, allowing for quick installation, disassembly, and replacement. This improves the efficiency of cleaning the coke formed inside the conveying pipe 5 and the efficiency of replacing the pipe due to oxidation and corrosion caused by prolonged operation at high temperatures.

[0033] After the waste mineral oil is fed into the atmospheric pressure furnace through the feed pipe 5 and heated, it is introduced into the tower body 6. The main body of the tower body 6 is equipped with multiple trays, forming a continuous gas-liquid contact unit. The rising high-temperature vapor and the reflux liquid at the top of the tower and the liquid phase flowing down the side are in countercurrent contact on the surface of the trays or packing. Due to the high temperature at the bottom of the tower and the low temperature at the top, a stable temperature gradient is formed along the height of the tower. At each contact surface, low-boiling-point components tend to transfer from the liquid phase to the gas phase and absorb heat as they rise, while high-boiling-point components tend to condense and release heat from the gas phase and flow down into the liquid phase. This cascade effect of heat and mass transfer processes causes the gas phase to continuously accumulate light components as it rises, and the liquid phase to continuously accumulate heavy components as it flows down. The light-component-rich vapor discharged from the top of the tower enters the condenser, where the heat is carried away by the cooling medium. Most of the vapor is condensed into liquid light fuel oil and collected in the reflux tank. Part of the condensate is pressurized and forced back to the top tray of the tower by the reflux pump to form reflux liquid.

[0034] In a preferred embodiment of the present invention, the heating furnace 3 includes a radiation chamber 8 and a furnace chamber 9 disposed at the bottom of the radiation chamber 8. The furnace chamber 9 is used to place fuel for combustion to generate heat radiation and transmit it to the radiation chamber 8. The material conveying pipe 5 is disposed in the radiation chamber 8.

[0035] In a preferred embodiment of the present invention, the circulation component 4 is disposed on the top of the radiation chamber 8, the top of the radiation chamber 8 is provided with a vent 10, and a shield is provided at the vent 10.

[0036] In a preferred embodiment of the present invention, the circulation component 4 includes a fixed frame 11, a motor 12 fixedly connected to the fixed frame 11, and a fan blade 13 fixedly connected to the motor 12. The fan blade 13 is used to accelerate the flow of heat radiation.

[0037] It should be noted that the heating furnace 3 includes a radiant chamber 8 and a furnace chamber 9 located at the bottom of the radiant chamber 8. The radiant chamber 8 and the furnace chamber 9 are separated by a steel plate. The furnace chamber 9 is used to place fuel for combustion. The heat generated by combustion is radiated into the radiant chamber 8 through the steel plate. A door is provided on one side of the radiant chamber 8. A vent 10 is provided on the top of the radiant chamber 8. The motor 12 is located at the vent 10. The output shaft of the motor 12 is fixedly connected to the fan blade 13. The motor 12 is fixedly connected to the radiant chamber 8 through a fixing bracket 11. When the fan blade 13 rotates, the airflow is directed towards the vent 10. A shield is provided at the vent 10.

[0038] During the heating process, the chamber door is closed, and the shield covers the vent 10. Waste mineral oil enters the feed pipe 5, which is located inside the radiant chamber 8. Fuel is burned in the furnace 9, and heat is transferred to the radiant chamber 8 through the steel plate. The motor 12 rotates, driving the fan blades 13 to rotate, which in turn drives the hot air to flow rapidly to the vent 10. Due to the shield, the hot air disperses, while the continuous rotation of the fan blades 13 continuously absorbs the hot air from the bottom and moves it upward, thus forming a circulation of hot air in the radiant chamber 8. This continuously heats the waste mineral oil in the feed pipe 5, and at the same time, the flow of hot air makes the temperature inside the radiant chamber 8 uniform. After heating is completed, the shield is removed and the chamber door is opened. The motor 12 drives the fan blades 13 to rotate. At this time, the vent 10 is no longer covered by the shield, and the hot air inside the radiant chamber 8 flows out rapidly under the action of the fan blades. At the same time, ambient air from outside enters the radiant chamber 8.

[0039] In a preferred embodiment of the present invention, the feeding pipe 5 includes an inlet pipe and an outlet pipe, which are connected and are both installed in the radiant chamber 8 for heating.

[0040] In a preferred embodiment of this utility model, a plurality of feed pipes are provided, the feed pipes are bent into a U-shape and are evenly attached to the inner wall of the radiation chamber 8, and the feed pipes adjacent to the connecting components are connected.

[0041] In a preferred embodiment of the present invention, a connecting hole is provided at the end of the feed tube, and a retaining shaft 15 is slidably disposed in the connecting hole, with both ends of the retaining shaft 15 being hemispherical.

[0042] It should be noted that the conveying pipe 5 includes an inlet pipe and an outlet pipe, which are connected. The inlet pipe is arranged in a U-shape and uniformly on the inner wall of the radiation chamber 8, while the outlet pipe is spirally arranged in the middle part of the radiation chamber 8. Thus, during the operation of this equipment, waste mineral oil enters from the inlet end of the inlet pipe, which is located on the outside of the bottom of the radiation chamber 8. It is connected to the external waste mineral oil and pumped to the inlet pipe into the radiation chamber 8. In the inlet pipe, it flows from the bottom to the top of the radiation chamber 8, and then flows to the outlet pipe at the bottom of the radiation chamber 8. From the outlet pipe, it circulates upwards to the tower body 6 for fractionation.

[0043] It should also be noted that there are several feed pipes, each of which is formed by bending a straight pipe into a U-shape. The U-shape is then bent into a U-shape that fits against the three inner walls of the radiation chamber 8, excluding the chamber door. This allows the feed pipe to flow upward in an S-shape within the radiation chamber 8, ensuring that the waste mineral oil is heated for a sufficient period of time within the feed pipe. This prevents some waste mineral oil from failing to be fully heated when the flow rate in the pipe is too high.

[0044] In a preferred embodiment of the present invention, the connecting assembly includes a fixing plate 16 and a connecting plate 17. The fixing plate 16 and the connecting plate 17 are symmetrically fixedly connected inside the radiation chamber 8, and positioning holes are respectively provided on the fixing plate 16 and the connecting plate 17.

[0045] In a preferred embodiment of this utility model, a limiting tube 18 is fixedly connected to the connecting hole on the connecting plate 17, and a slip ring 19 is slidably connected to the limiting tube 18. A rectangular sliding hole 20 is evenly opened on the inner circumference of the limiting tube 18, and a top plate 21 is slidably connected to the sliding hole 20. The bottom plane of the top plate 21 is flush with the inner circumferential surface of the inner wall of the limiting tube 18. A spring 22 is hollowly provided in the inner wall of the limiting tube 18. The slip ring 19, the top plate 21 and the spring 22 are fixedly connected in this way.

[0046] In a preferred embodiment of the present invention, the connecting component further includes a bent pipe 23, a fixing groove is provided on the outer wall of the bent pipe 23, the fixing groove is hemispherical, the bent pipe 23 is transitionally fitted with the limiting ring, and the fixing groove can fit with the retaining shaft 15.

[0047] It should be noted that the connecting components include a fixing plate 16, a connecting plate 17, and a bend 23. Positioning holes are provided on both the fixing plate 16 and the connecting plate 17. The fixing plate 16 and the connecting plate 17 are respectively fixedly connected to the two sides of the inner side of the door of the radiation chamber 8. The feed pipe is formed by bending a straight pipe in half. The arc-shaped bend at the bottom is located at the fixing plate 16. The two ends of the arc-shaped bend pass through the positioning holes of the fixing plate 16, so that the bend is fixed through the positioning holes on the fixing plate 16 to prevent it from shaking. The endpoints are located in the positioning holes of the connecting plate 17 and are inserted into the inside of the feed pipe through the bend 23. The tolerance value between the feed pipe and the bend 23 is 0. The arc-shaped structure of the bend 23 is similar to that of the bend of the feed pipe.

[0048] After the bend 23 is inserted into the feed pipe, the feed pipe and the bend 23 form a closed elliptical shape, and the elliptical shape is bent into a U-shape and placed close to the inner wall of the radiation chamber 8. The fixing plate 16 and the connecting plate 17 are respectively locked at two positions of the elliptical arc, so that during the operation of the equipment, the positioning holes on the arc-shaped fixing plate 16 and connecting plate 17 respectively limit the vibration generated by the rotation of the motor 12 and prevent the feed pipe from shaking. Moreover, during the connection process of the bend 23, the bend 23 connects the adjacent feed pipes, so that the waste mineral oil can flow in the radiation chamber 8 to the maximum extent, increasing the heating time of the waste mineral oil and preventing the waste mineral oil from entering the tower body 6 before it is fully heated.

[0049] During the connection of the bend 23, a limiting tube 18 is fixedly connected at the positioning hole of the connecting plate 17. The inner wall of the limiting tube 18 is hollow, and a spring 22 is provided in the hollow part. A sliding hole 20 penetrating the inner wall is opened on the circumference of the limiting tube 18. The sliding hole 20 is rectangular. A top plate 21 is slidably connected to the sliding hole 20, and a slip ring 19 is slidably connected to the limiting tube 18. The slip ring 19 and the top plate 21 are fixedly connected. The top plate 21 is fixedly connected to one end of the spring 22. Thus, when the slip ring 19 is pulled, the top plate 21 is moved, thereby compressing and releasing the spring 22. The bottom of the top plate 21 is flush with the inner circumference of the limiting tube 18.

[0050] Positioning holes are located on the circumference of the two ends of the feed tube. A retaining shaft 15 is slidably connected in the connecting hole. The retaining shaft 15 is elliptical and the connecting hole is cylindrical. The end of the connecting hole is curved towards the central axis of the connecting hole to prevent the retaining shaft 15 from falling off the connecting hole. The length of the retaining shaft 15 is longer than the length of the connecting hole. Specifically, the length of the retaining shaft 15 minus the length of the connecting hole equals the radius of the cross-section of the retaining shaft 15. Thus, one end of the retaining shaft 15 is always located outside the connecting hole.

[0051] In use of this utility model, during the connection of the bent tube 23 and the feed tube, firstly, both ends of the feed tube are inserted into the positioning holes of the connecting plate 17. At this time, the spring 22 is in a state of no force, and the spring 22 pushes the top plate 21 to the end of the sliding hole 20. At the same time, the top plate 21 presses against the connecting hole, causing one end of the retaining shaft 15 to protrude from the inner circumference of the feed tube. After the feed tube is inserted into the positioning hole, the slip ring 19 is pulled, which in turn compresses the spring 22 through the top plate 21. Simultaneously, due to the movement of the top plate 21, the retaining shaft 15 can move within the connecting hole. At this time, two different feed tubes are inserted into both ends of the bent tube 23 to connect adjacent feed tubes. During the insertion of the feed tube, Because the two ends of the retaining shaft 15 are hemispherical, the bent tube 23 can directly push the retaining shaft 15 out of the inner circumference of the feed tube until the position of the retaining shaft 15 is aligned with the position of the fixing groove on the bent tube 23. Then the slip ring 19 is released. The slip ring 19 is pushed by the spring 22 and drives the top plate 21 to move to the initial position. At the same time, the top plate 21 is back at the connection hole, pushing the retaining shaft 15 to be completely locked in the fixing groove of the bent tube 23. This makes the bent tube 23 and the feed tube completely fixedly connected. Moreover, in the process of cleaning the coke on the inner wall of the feed tube, it is only necessary to pull the slip ring 19 to quickly disengage it from the bent tube 23 to replace or clean the feed tube, which improves work efficiency.

[0052] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A combined atmospheric pressure furnace and tower processing device for the recycling of waste mineral oil, comprising: An atmospheric distillation column (1) and a fractionation column (2) disposed on one side of the atmospheric distillation column (1), characterized in that; The atmospheric pressure tower (1) includes a heating furnace (3), a circulation assembly (4) disposed on the top of the heating furnace (3), and a plurality of conveying pipes (5) disposed inside the lower part of the heating furnace (3), the plurality of conveying pipes (5) being connected to each other by a connecting assembly; The fractionation tower (2) includes a tower body (6) and a feed port (7) located at one end of the tower body (6); the feed port (7) is connected to the feed pipe (5); the top of the tower body (6) is connected to a condenser; The circulation component (4) includes a fixed frame (11), a motor (12) fixedly connected to the fixed frame (11), and a fan blade (13) fixedly connected to the motor (12). The fixed frame (11) is located on the top of the heating furnace (3), and a cover is provided on the top of the heating furnace (3).

2. The atmospheric pressure furnace and tower combined processing equipment for waste mineral oil recycling according to claim 1, characterized in that: The heating furnace (3) includes a radiation chamber (8) and a furnace chamber (9) located at the bottom of the radiation chamber (8), and the material conveying pipe (5) is located inside the radiation chamber (8).

3. The atmospheric pressure furnace and tower combined processing equipment for waste mineral oil recycling according to claim 2, characterized in that: The circulation component (4) is located on the top of the radiation chamber (8), and the top of the radiation chamber (8) is provided with a vent (10). The shield is located at the vent (10).

4. The atmospheric pressure furnace and tower combined treatment equipment for waste mineral oil recycling according to claim 2, characterized in that: The feeding pipe (5) includes an inlet pipe and an outlet pipe. The inlet pipe and the outlet pipe are connected and are both installed in the radiation chamber (8) for heating.

5. The atmospheric pressure furnace and tower combined processing equipment for waste mineral oil recycling according to claim 4, characterized in that: The feed pipe is provided in several ways. The feed pipe is bent into a U-shape and is evenly attached to the inner wall of the radiation chamber (8). The feed pipes adjacent to the connecting component are connected.

6. The atmospheric pressure furnace and tower combined treatment equipment for waste mineral oil recycling according to claim 5, characterized in that: A connection hole is provided at the end of the feed pipe, and a retaining shaft (15) is slidably disposed in the connection hole. The two ends of the retaining shaft (15) are hemispherical.

7. The atmospheric pressure furnace and tower combined processing equipment for waste mineral oil recycling according to claim 6, characterized in that: The connecting assembly includes a fixing plate (16) and a connecting plate (17). The fixing plate (16) and the connecting plate (17) are symmetrically fixedly connected inside the radiation chamber (8). The fixing plate (16) and the connecting plate (17) have positioning holes respectively.

8. The atmospheric pressure furnace and tower combined processing equipment for waste mineral oil recycling according to claim 7, characterized in that: The connecting hole on the connecting plate (17) is fixedly connected to the limiting tube (18), and the limiting tube (18) is slidably connected to the slip ring (19). The inner circumference of the limiting tube (18) is uniformly provided with through rectangular sliding holes (20).

9. The atmospheric pressure furnace and tower combined processing equipment for waste mineral oil recycling according to claim 8, characterized in that: A top plate (21) is slidably connected to the sliding hole (20). The bottom plane of the top plate (21) is flush with the inner circumferential surface of the inner wall of the limiting tube (18). The inner wall of the limiting tube (18) is hollow and a spring (22) is provided. The slip ring (19), the top plate (21) and the spring (22) are fixedly connected in this way.

10. The atmospheric pressure furnace and tower combined processing equipment for waste mineral oil recycling according to claim 8, characterized in that: The connecting assembly also includes a bend (23), on the outer wall of the bend (23) is a fixing groove, the fixing groove is hemispherical, the bend (23) is in transition fit with the limiting tube, and the fixing groove can fit with the retaining shaft (15).

Images