Tire pyrolysis continuous production external device

Abstract

This invention relates to an external device for continuous tire pyrolysis production, comprising an end separation chamber. A carbon black feeding hopper is sealed to the bottom of the end separation chamber. A drain pipe is welded to the inner wall of the carbon black feeding hopper. The top of the drain pipe, near the welding line, is open. An oil outlet is provided on the shell of the carbon black feeding hopper. The drain pipe is inclined, and its lower end is connected to one end of the oil outlet. The other end of the oil outlet is connected to a return pipe, and the other end of the return pipe is connected to an oil collection tank. Cooling units are provided on the exterior of both the return pipe and the oil collection tank. A pressure relief valve, a nitrogen injection pipe, and a liquid seal pipe are connected to the top of the oil collection tank. A nitrogen delivery valve is installed on the nitrogen injection pipe, and a one-way valve is installed on the liquid seal pipe. This device ensures continuous and efficient production while also improving safety during production.

Description

Technical Field

[0001] This invention relates to the field of tire pyrolysis technology, and in particular to an external device for continuous tire pyrolysis production. Background Technology

[0002] Waste tires are recycled and crushed into granules suitable for pyrolysis. These granules are then placed in a high-temperature, atmospheric-pressure, oxygen-free pyrolysis reactor. After adding a catalyst, the waste tire granules are heated for catalytic pyrolysis, yielding carbon black and pyrolysis oil and gas. The pyrolysis oil and gas are recovered and cooled to obtain pyrolysis oil. The carbon black is discharged from a dedicated outlet.

[0003] During the pyrolysis process, carbon black and oil gas are fed from one side of the pyrolysis furnace, while carbon black and oil gas are discharged from the other side. The oil gas can be discharged using the pressure difference, but the carbon black requires mechanical conveying. The temperature of the pyrolysis oil gas during pyrolysis can typically reach several hundred degrees Celsius. Even slight temperature fluctuations during its movement can affect its state, easily causing it to change from a gaseous to a liquid state. Because the pipe discharging carbon black is far from the pyrolysis furnace, and part of this pipe needs to be connected to external conveying machinery and extends considerably, it is difficult to effectively insulate the outside of the pipe. Meanwhile, the internal temperature of the pipe is much higher than the external temperature. When the pyrolysis oil gas reaches this point, the inner wall of the pipe is slightly cooler. Upon contact, the oil gas liquefies and adheres to the inner wall, moving downwards. Finally, the liquefied oil drips into the carbon black. During long-term continuous production, the accumulation of the mixture of carbon black and oil at the carbon black discharge pipe causes blockage, thus affecting the continuous production of the equipment.

[0004] Therefore, an external device for continuous tire pyrolysis production is needed to solve the above-mentioned technical problems. Summary of the Invention

[0005] This invention addresses the technical problems existing in the prior art by providing an external device for continuous tire pyrolysis production.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: An external device for continuous tire pyrolysis production includes an end separation chamber. The bottom of the end separation chamber is sealed and connected to a carbon black feeding chamber. A diversion pipe is welded to the inner wall of the carbon black feeding chamber. The top of the diversion pipe is open near the welding line. An oil outlet is provided on the shell of the carbon black feeding chamber. The diversion pipe is inclined. The lower end of the diversion pipe is connected to one end of the oil outlet. The other end of the oil outlet is connected to a return pipe. The other end of the return pipe is connected to an oil collection tank. Cooling units are provided on the outside of the return pipe and the oil collection tank. A pressure relief valve, a nitrogen injection pipe, and a liquid seal pipe are connected to the top of the oil collection tank. A nitrogen delivery valve is installed on the nitrogen injection pipe, and a one-way valve is installed on the liquid seal pipe.

[0007] Preferably, in the above-mentioned tire pyrolysis continuous production external device, the return pipe includes a first return pipe, a hose, and a second return pipe, the hose is connected between the first return pipe and the second return pipe, and the lower end of the first return pipe is connected to the oil collection tank.

[0008] Preferably, in the above-mentioned tire pyrolysis continuous production external device, the cooling unit includes a cooling tank and a cooling sleeve. The cooling tank is fitted outside the oil collection tank, and the cooling sleeve is fitted outside the first return pipe. The cooling tank and the cooling sleeve are in communication.

[0009] Preferably, in the above-mentioned tire pyrolysis continuous production external device, the cooling tank is provided with a second coolant circulation interface, and the cooling sleeve is provided with a first coolant circulation interface.

[0010] Preferably, in the above-mentioned tire pyrolysis continuous production external device, the lower end of the liquid seal pipe is provided with a liquid seal barrel, the liquid seal barrel is filled with distilled water, and the lower end of the liquid seal pipe is inserted below the surface of the distilled water.

[0011] Preferably, in the above-mentioned tire pyrolysis continuous production external device, a level gauge is installed on the outside of the oil collection tank.

[0012] Preferably, in the above-mentioned tire pyrolysis continuous production external device, the height of the oil outlet is higher than the outlet end of the first return pipe.

[0013] Preferably, in the above-mentioned tire pyrolysis continuous production external device, the top of the drain pipe is inclined.

[0014] Preferably, in the above-mentioned tire pyrolysis continuous production external device, a four-way valve is connected to the second return pipe.

[0015] The beneficial effects of this invention are as follows: by welding a drainage pipe to the inner wall of the end separation chamber and setting the drainage pipe at an angle, the oil on the inner wall can be drained to the outside of the end separation chamber, thereby avoiding pipe blockage caused by the mixing of oil and carbon black, and ensuring the continuity and efficiency of production; the cooling unit can cool the oil, ensuring the safety of the oil after drainage; by connecting a hose between the first return pipe and the second return pipe, the mechanical vibration transmitted from the carbon black feeding hopper can be absorbed, ensuring the stable connection of each connection component; by installing a one-way valve on the liquid seal pipe, an automatic pressure relief function can be achieved, ensuring safe production; by installing a four-way valve on the second return pipe, it is convenient for later unblocking and maintenance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external connection structure of the oil collection tank and cooling unit of the present invention;

[0017] Figure 2 for Figure 1 Internal structure diagram;

[0018] Figure 3 A schematic diagram showing the connection structure of the pyrolysis furnace, rotary conveyor pipeline, and end separation chamber;

[0019] Figure 4 for Figure 3 A sectional view along the A-A direction;

[0020] Figure 5 This is a schematic diagram of the cross-sectional connection structure between the drainage tube and the inner wall.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 1. Cracking furnace; 2. Rotary conveyor pipe; 3. End separation chamber; 4. Carbon black feeding chamber; 5. Oil and gas outlet; 6. Oil outlet; 7. Carbon black discharge port; 8. Separation chamber connecting pipe; 9. Chain; 10. Drive shaft; 11. Oil collection tank; 12. Inner wall; 13. Cooling tank; 14. Cooling sleeve; 15. First return pipe; 16. Coolant; 17. First coolant circulation interface; 18. Second coolant circulation interface; 19. Hose; 20. Four-way valve; 21. Second return pipe; 22. Pressure relief valve; 23. Nitrogen injection pipe; 24. Liquid seal pipe; 25. Check valve; 26. Liquid seal tank; 27. Liquid level gauge; 28. Drainage pipe. Detailed Implementation

[0023] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, an external device for continuous tire pyrolysis production is described. A rotary conveyor pipe 2 is connected to the end of a pyrolysis furnace 1. A separation chamber connecting pipe 8 is connected to the end of the rotary conveyor pipe 2, and a final separation chamber 3 is connected to the end of the separation chamber connecting pipe 8. The rotary conveyor pipe 2 is rotatably and sealed to the separation chamber connecting pipe 8 and the pyrolysis furnace 1 via seals and bearings. A ring of meshing teeth is provided on the outside of the rotary conveyor pipe 2, which is connected to a gear on an external drive shaft 10 via a chain 9. The rotation of the drive shaft 10, through the chain 9, drives the rotary conveyor pipe 2 to rotate, thereby driving the auger inside the rotary conveyor pipe 2 to rotate, thus conveying carbon black towards the final separation chamber 3.

[0025] The top of the end separation chamber 3 is equipped with an oil and gas outlet 5, through which the cracked oil and gas are transported to the outside for liquefaction and collection. The bottom of the end separation chamber 3 is sealed and welded with a carbon black feeding hopper 4. The carbon black feeding hopper 4 is equipped with a vertical spiral conveyor inside, and the transmission structure at the bottom is sealed and connected to the carbon black discharge port 7 at its lower end to ensure that the carbon black can be discharged smoothly from the carbon black discharge port 7.

[0026] Preferably, a drainage pipe 28 is welded to the inner wall 12 of the carbon black feeding hopper 4 on the side near the separation chamber connecting pipe 8. This can be adjusted according to specific circumstances during use; if a large amount of oil also appears on the other side of the inner wall of the carbon black feeding hopper 4, a drainage pipe 28 can also be welded to that side.

[0027] like Figure 4 , Figure 5 As shown, the top of the drain pipe 28 near the welding line is open, and the drain pipe 28 is inclined. Oil dripping from the inner wall 12 falls into the drain pipe 28. The carbon black feeding hopper 4 has an oil outlet 6 on its shell, and the lower end of the drain pipe 28 is connected to one end of the oil outlet 6. The inclined top of the drain pipe 28 minimizes the amount of carbon black falling into it.

[0028] The other end of the oil outlet 6 is connected to a second return pipe 21, and the end of the second return pipe 21 is connected to a four-way valve 20. One end of the hose 19 is connected to one port of the four-way valve 20, and the other end of the hose 19 is connected to a first return pipe 15. The lower end of the first return pipe 15 is connected to the oil collection tank 11. The heights of the oil outlet 6, the second return pipe 21, the hose 19, and the first return pipe 15 decrease sequentially, facilitating the flow of oil into the oil collection tank 11 under its own gravity. The hose 19 and the second return pipe 21 are respectively connected to two adjacent ports on the four-way valve 20. During normal production, the other two ports of the four-way valve 20 are closed; when the pipeline is blocked, the other two ports of the four-way valve 20 can be opened, and a drain rod can be inserted to clear the blockage. The hose 19 is designed to absorb mechanical vibrations transmitted from one side of the carbon black feed hopper 4, preventing the vibrations from being transmitted to the oil collection tank 11 and ensuring the stability of all connections.

[0029] A level gauge 27 is installed on the outside of the oil collection tank 11, through which the oil level in the oil collection tank 11 can be observed. An oil drain outlet is provided at the bottom of the oil collection tank 11, and the oil is discharged when the tank is full.

[0030] A cooling tank 13 is fitted around the oil collection tank 11, and a cooling sleeve 14 is fitted around the first return pipe 15. The cooling tank 13 and the cooling sleeve 14 are connected, and coolant 16 circulates inside the cooling tank 13 and the cooling sleeve 14. A second coolant circulation port 18 is provided on the cooling tank 13, and a first coolant circulation port 17 is provided on the cooling sleeve 14. The first coolant circulation port 17 and the second coolant circulation port 18 are connected to an external circulation pump, which allows the coolant 16 to circulate and cool the oil. Due to the high oil temperature, there is a significant risk that if oxygen is present in the oil collection tank 11, it will explode.

[0031] The top of the oil collection tank 11 is connected to a pressure relief valve 22, a nitrogen injection pipe 23, and a liquid seal pipe 24. A nitrogen delivery valve is installed on the nitrogen injection pipe 23, and a one-way valve 25 is installed on the liquid seal pipe 24. Before use, a large amount of nitrogen is introduced into the oil collection tank 11 through the nitrogen injection pipe 23 to purge the air inside, primarily to remove oxygen from the air. The one-way valve 25 only allows gas inside the oil collection tank 11 to escape, while preventing external air from entering. Simultaneously, the one-way valve 25 provides automatic pressure relief, ensuring safe production. A liquid seal container 26 is installed at the lower end of the liquid seal pipe 24. The liquid seal container 26 is filled with distilled water, and the lower end of the liquid seal pipe 24 is inserted below the surface of the distilled water. The distilled water absorbs the cracked oil gas, preventing a small amount of cracked oil gas from being released into the air and polluting it.

[0032] Working principle: When using this external device for continuous pyrolysis production, after the pyrolysis oil and gas come into contact with the inner wall 12 of the end separation chamber 3, if the temperature of the inner wall 12 is lower than the temperature of the oil and gas, the pyrolysis oil and gas will liquefy and adhere to the inner wall 12. The oil drips into the guide pipe 28 and flows along the guide pipe 28 to the oil outlet 6. It then flows through the second return pipe 21, the hose 19, and the first return pipe 25 to the oil collection tank 11. This avoids the oil dripping into the carbon black, affecting the viscosity of the carbon black and clogging the pipes.

[0033] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. An external device for continuous tire pyrolysis production, comprising an end separation chamber (3), wherein a carbon black feeding chamber (4) is sealed to the bottom of the end separation chamber (3), characterized in that: A drain pipe (28) is welded to the inner wall (12) of the carbon black feeding silo (4). The top of the drain pipe (28) is open near the welding line. An oil outlet (6) is provided on the shell of the carbon black feeding silo (4). The drain pipe (28) is inclined. The lower end of the drain pipe (28) is connected to one end of the oil outlet (6). The other end of the oil outlet (6) is connected to a return pipe. The other end of the return pipe is connected to an oil collection tank (11). Cooling units are provided on the outside of the return pipe and the oil collection tank (11). A pressure relief valve (22), a nitrogen injection pipe (23), and a liquid seal pipe (24) are connected to the top of the oil collection tank (11). A nitrogen delivery valve is installed on the nitrogen injection pipe (23), and a check valve (25) is installed on the liquid seal pipe (24).

2. The tire pyrolysis continuous production external device according to claim 1, characterized in that: The return pipe includes a first return pipe (15), a hose (19), and a second return pipe (21). The hose (19) is connected between the first return pipe (15) and the second return pipe (21). The lower end of the first return pipe (15) is connected to the oil collection tank (11).

3. The tire pyrolysis continuous production external device according to claim 1, characterized in that: The cooling unit includes a cooling tank (13) and a cooling sleeve (14). The cooling tank (13) is fitted outside the oil collection tank (11), and the cooling sleeve (14) is fitted outside the first return pipe (15). The cooling tank (13) and the cooling sleeve (14) are connected.

4. The tire pyrolysis continuous production external device according to claim 3, characterized in that: The cooling tank (13) is provided with a second coolant circulation port (18), and the cooling sleeve (14) is provided with a first coolant circulation port (17).

5. The tire pyrolysis continuous production external device according to claim 1, characterized in that: The lower end of the liquid seal tube (24) is provided with a liquid seal barrel (26), the liquid seal barrel (26) is filled with distilled water, and the lower end of the liquid seal tube (24) is inserted below the surface of the distilled water.

6. The tire pyrolysis continuous production external device according to claim 1, characterized in that: A level gauge (27) is installed on the outside of the oil collection tank (11).

7. The tire pyrolysis continuous production external device according to claim 2, characterized in that: The height of the oil outlet (6) is higher than the outlet end of the first return pipe (15).

8. The tire pyrolysis continuous production external device according to claim 1, characterized in that: The top of the drainage tube (28) is inclined.

9. The tire pyrolysis continuous production external device according to claim 2, characterized in that: A four-way valve (20) is connected to the second return pipe (21).

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