Equipment for after-treatment of waste tire thermal cracking carbon black
By using a double-layer reactor and multi-gas modification treatment, the problems of low specific surface area and low structure of waste tire pyrolysis carbon black were solved, thereby increasing its application ratio in rubber products.
Patent Information
- Application Number
- CN202423060972.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-11
AI Technical Summary
The low specific surface area and structure of waste tire pyrolysis carbon black, along with its low content of surface-active groups, result in poor reinforcing properties in rubber, making it unsuitable for large-scale application in tires.
The reactor adopts a double-layer structure, with an outer layer of isostatic graphite and an inner layer of 316L stainless steel. Heating wires are spirally wound for uniform heating, and different gases are introduced through multiple air inlets for modification treatment. An integrated condenser collects oil impurities, achieving ultra-high temperature treatment.
It significantly improves the specific surface area and structure of pyrolysis carbon black, restores the activity of some surface groups, and increases its application in green tires and rubber products.
Smart Images
Figure CN223547951U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of processing device technology, specifically to a device for the post-processing of carbon black from waste tire pyrolysis. Background Technology
[0002] Waste tire rubber blocks undergo thermal pyrolysis in an oxygen-free or oxygen-deficient pyrolysis furnace. The solid pyrolysis products generated are then processed by iron removal and grinding to obtain a product called waste tire thermal pyrolysis carbon black.
[0003] However, since waste tire pyrolysis carbon black is a mixed carbon material, in addition to amorphous carbon, it also contains a certain amount of coke, hard carbon, unpyrolyzed rubber hydrocarbons, and pyrolysis oil and other impurities. These impurities are irregularly wrapped on the surface of pyrolysis carbon black and filled in the internal pores, resulting in a lower specific surface area and structure than virgin carbon black, a lower content of surface active groups, and poorer reinforcing performance in rubber. Therefore, it cannot be used in tires in a large proportion. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] To address the shortcomings of existing technologies, this invention provides a device for the post-processing of waste tire pyrolysis carbon black, thereby solving the problem mentioned in the background art that waste tire pyrolysis carbon black has a lower specific surface area and structure than virgin carbon black, a lower content of surface active groups, and poorer reinforcing properties in rubber, thus preventing its large-scale application in tires.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model provides the following technical solution: a device for post-processing of waste tire pyrolysis carbon black, comprising:
[0008] A base, on the surface of which an air intake flow meter is mounted;
[0009] A feeding hopper is located on the left side of the upper surface of the base, and a feeding port is provided on the upper surface of the feeding hopper;
[0010] The reactor is located on the right side of the upper surface of the base. The reactor has air inlets evenly distributed at the feed end, discharge end and side. The number of air inlets at the feed end and discharge end of the reactor is not less than 4. A conveying pipe is installed at the lower part of the feed hopper.
[0011] The motor is located on the left side of the conveying pipe, and the rotor of the motor is coaxially mounted with an auger. The discharge port is located on the right side of the reactor.
[0012] The discharge pipe is located on the right side of the discharge port. The discharge pipe is connected to a finished product tank. Both sides of the reaction vessel are equipped with gas outlet pipes. The gas outlet end of each gas outlet pipe is equipped with a condensation collection tank for cooling and collecting the relevant oil and chemical reagents.
[0013] A vacuum chamber is installed on the inner wall of the reactor. The inner side of the vacuum chamber is the reactor cylinder wall, which is connected to the air inlet. The reactor cylinder wall is composed of an outer isostatic graphite layer and an inner 316L stainless steel layer, with a 2mm gap between the outer modules. Heating wires are spirally wound between the isostatic graphite layer and the 316L stainless steel layer. A drain port is installed at the bottom of the reactor. Exhaust pipes are installed on both sides of the upper surface of the reactor and are connected to the gas outlet. A protective gas inlet is provided next to the exhaust pipe and is connected to the corresponding air inlet. A condensate inlet and a condensate outlet are installed at the bottom and top of the reactor, respectively. A condensate channel is opened on the outside of the inner tube of the exhaust pipe, and the inner tube of the exhaust pipe is connected to the reactor cylinder wall.
[0014] Preferably, valves are installed on the outside of each air inlet, and inert protective gases such as nitrogen can be injected into the reactor through the air inlet by opening the valves.
[0015] Preferably, a mounting plate is installed on the left side of the feed hopper, and the motor is mounted on the upper surface of the mounting plate. The mounting plate is used to install the motor.
[0016] Preferably, a sealing flange is installed at the bottom of the sewage outlet, and a sealing cover is provided at the bottom of the sealing flange to seal the bottom of the sewage outlet.
[0017] Preferably, bolts are evenly screwed onto the bottom of the sealing cover, and the upper part of each bolt is screwed onto the surface of the sealing flange, so that the sealing cover can be installed by means of the bolts.
[0018] Preferably, an aggregating box is installed at the upper part of the inner cavity of the feeding hopper, and a discharge channel is installed at the bottom of the aggregating box. The bottom of the discharge channel communicates with the inner cavity of the conveying pipe, and waste tire pyrolysis carbon black can be injected into the conveying pipe through the aggregating box.
[0019] Beneficial effects
[0020] Compared with the prior art, this utility model provides a device for the post-processing of waste tire pyrolysis carbon black, which has the following beneficial effects:
[0021] This equipment for the post-processing of carbon black from waste tire pyrolysis features an inner reactor whose inner wall is composed of two layers of material. The outer layer is made of isostatically pressed graphite, which can withstand high temperatures for extended periods. Each material module has approximately 2mm gaps to prevent thermal expansion and contraction. The inner layer is made of 316L stainless steel, which is resistant to acid and alkali corrosion. The heating element is located between the isostatically pressed graphite and stainless steel inner walls, spiraling around the cylinder for uniform heating. This improves the uniformity of the modification degree of the pyrolysis carbon black. Air inlets at different locations within the reactor allow for the introduction of different types of gas into different parts of the reactor. By using different gases or steam to modify materials, and adding heating components to heat the materials in the reactor to ultra-high temperatures (below 1000℃), the volatilization of oils and other organic impurities in the materials can be promoted. In conjunction with a condensation device, oil impurities can be collected. The pyrolysis carbon black after being processed by this device has a significantly improved specific surface area and structure, and some surface groups have regained activity. It can be used as a sustainable material in a larger proportion of green tires and rubber products, thereby solving the defects of pyrolysis carbon black with many impurities on the surface and inside and poor reinforcing performance mentioned in the background technology. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the structure of this utility model;
[0023] Figure 2 This is a cross-sectional view of the feed hopper of this utility model;
[0024] Figure 3 This is a schematic diagram of the installation structure of the reaction vessel of this utility model;
[0025] Figure 4 This is a cross-sectional view of the reaction vessel of this utility model;
[0026] Figure 5 This is an exploded perspective view of the sewage outlet of this utility model;
[0027] Figure 6 This is a top view of the reactor of this utility model;
[0028] Figure 7 This is a schematic diagram of the cross-sectional structure of the reaction vessel of this utility model.
[0029] In the diagram: 1. Base; 2. Inlet flow meter; 3. Feed hopper; 4. Feed inlet; 5. Air inlet; 6. Reactor; 7. Conveying pipe; 8. Motor; 9. Screwdriver; 10. Discharge port; 101. Discharge pipe; 102. Air outlet pipe; 103. Condensate collection tank; 11. Finished product tank; 12. Vacuum tank; 13. Heating wire; 14. Drain outlet; 15. Exhaust pipe outlet; 16. Condensate inlet; 17. Valve; 18. Mounting plate; 19. Sealing flange; 20. Sealing cover plate; 21. Bolt; 22. Collection box; 23. Discharge channel; 24. Condensate outlet; 25. Reactor wall; 26. Protective gas inlet. Detailed Implementation
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0031] This utility model provides a technical solution: a device for the post-processing of carbon black from waste tire pyrolysis. Please refer to [link / reference]. Figure 1 It includes a base 1, on the surface of which an air intake flow meter 2 is mounted. The air intake flow meter 2 is installed outside the main air intake and is used to count the flow rate.
[0032] The feeding bin 3 is located on the left side of the upper surface of the base 1, and the upper surface of the feeding bin 3 is provided with a feeding port 4;
[0033] Reactor 6 is located on the right side of the upper surface of base 1. Please refer to [reference needed]. Figure 6 and Figure 7 The reactor 6 has air inlets 5 evenly distributed at the feed end, discharge end and side. The number of air inlets 5 at the feed end and discharge end of the reactor 6 is not less than 4. The feed hopper 3 is equipped with a conveying pipe 7 at the bottom.
[0034] Please see Figure 3 Motor 8 is located on the left side of conveying pipe 7. The rotor of motor 8 is coaxially mounted with auger 9. Discharge port 10 is opened on the right side of reactor 6.
[0035] Please see Figure 4 The reactor 6 is a rotating cylindrical vessel with a double-layered shell and vacuum insulation. The reactor body does not rotate in a ring shape, but rotates half a circle in the forward direction and then half a circle in the reverse direction. The outer layer of the vessel body is an insulation layer made of 316L stainless steel.
[0036] Please see Figure 3The discharge pipe 101 is located on the right side of the discharge port 10. The discharge pipe 101 is connected to the finished product tank 11. Both sides of the reaction vessel 6 are equipped with gas outlet pipes 102. The gas outlet end of the gas outlet pipe 102 is equipped with a condensation collection tank 103. The condensation collection tank 103 is used to condense and collect the high-temperature steam to obtain the relevant oil and chemical reagents.
[0037] Please see Figure 4 A vacuum tank 12 is installed on the inner wall of the reactor 6. The inner side of the vacuum tank 12 is provided with a reactor cylinder wall 25, which communicates with the air inlet 5. The reactor cylinder wall 25 is composed of an outer isostatic graphite layer and an inner 316L stainless steel layer, with a 2mm gap between the outer modules. A heating wire 13 is spirally wound between the isostatic graphite layer and the 316L stainless steel layer. A drain port 14 is also installed at the bottom of the reactor 6. Exhaust pipes 15 are installed on both sides of the upper surface of the reactor 6, communicating with the exhaust pipe 102. A protective gas inlet 26 is located next to the exhaust pipe 15, connected to the corresponding air inlet 5. The protective gas inlet 26 is used to input gas into the corresponding air inlet 5 and is used for external supply of protective gas. A pipeline for a gas (such as nitrogen) is used to introduce protective gas into the inlet 5. The bottom and top of the reactor 6 are respectively equipped with a condensate inlet 16 and a condensate outlet 24. The inner tube of the exhaust pipe 15 has a condensate channel on the outside, and the inner tube of the exhaust pipe 15 is connected to the reactor wall 25. During operation, the inner tube of the exhaust pipe 15 will export the high-heat impurity gas inside the reactor wall 25, and after condensation by the condensation component, it will be finally introduced into the condensation collection tank 103 from the outlet pipe 102 for collection. At the same time, the drain outlet 14 is opened below the exhaust pipe 15. The light impurities that are dispersed after the thermal cracking of waste tire carbon black enter the outlet pipe 102 through the exhaust pipe 15, and the heavy impurities fall into the cavity above the drain outlet 14 for accumulation, and are finally collected and discharged through the drain outlet 14.
[0038] The inner wall of reactor 6 is composed of two layers of materials stacked together. The outer layer is made of isostatic graphite material that can withstand high temperatures for extended periods, with approximately 2mm gaps between each material module to prevent thermal expansion and contraction. The inner layer is made of 316L stainless steel, which provides a certain degree of resistance to acid and alkali corrosion.
[0039] The heating wire 13 is located between the isostatic graphite and stainless steel cylinder wall of the inner layer of the vessel, spiraling around the cylinder to provide uniform heating. The heating wire 13 is made of silicon carbide material and has the characteristics of high temperature resistance and long service life.
[0040] The piping layout of air inlet 5 includes two forms, such as... Figure 6 and Figure 7As shown: The first type has air inlets 5 located at the feed end and the discharge end, symmetrically distributed, with at least 4 air inlets 5, usually used to introduce protective inert gas; the second type has one air inlet 5 every half meter in the axial direction of the vessel body. This type of air inlet 5 is usually used to introduce chemical solutions, water vapor, or carbon dioxide, etc. The two pipeline arrangement methods are combined to meet the needs of introducing different types of gases at different stages.
[0041] Valves 17 are installed on the outside of each air inlet 5 to control the flow rate and pressure.
[0042] The exhaust port 15, located at both ends of the reactor body, efficiently discharges air entrained during the feeding of pyrolysis carbon black powder. Because the reactor body of the post-treatment unit is at a high temperature, air is entrained during the feeding of pyrolysis carbon black powder. Therefore, inert gas flowing from both ends of the reactor body is used to discharge the air, preventing spontaneous combustion of the pyrolysis carbon black powder. Simultaneously, pyrolysis carbon black contains a certain amount of undecomposed rubber hydrocarbons and volatile organic compounds from pyrolysis oils, all of which volatilize significantly inside the heated reactor body. Inert gas is used to discharge these volatile substances, which are then cooled and collected at both ends of the reactor body. This prevents residual volatiles from condensing a second time on the furnace wall and the surface of the pyrolysis carbon black during the high-temperature process. The exhaust gas is uniformly condensed and filtered in the tail gas cooling section.
[0043] A special rotating spiral is installed inside the feed inlet 4 to help the powder material be smoothly transported into the reactor body and avoid bridging.
[0044] Each air inlet 5 is equipped with a valve 17. By opening the valve 17, nitrogen gas can be injected into the reactor 6 through the air inlet 5.
[0045] Please see Figure 3 An mounting plate 18 is installed on the left side of the feed hopper 3, and the motor 8 is installed on the upper surface of the mounting plate 18. The mounting plate 18 is used to install the motor 8.
[0046] Please see Figure 5 A sealing flange 19 is installed at the bottom of the drain outlet 14, and a sealing cover plate 20 is provided at the bottom of the sealing flange 19. The sealing cover plate 20 is used to seal the bottom of the drain outlet 14.
[0047] Bolts 21 are evenly screwed onto the bottom of the sealing cover plate 20, and the upper part of the bolts 21 is screwed onto the surface of the sealing flange 19. The sealing cover plate 20 can be installed by means of the bolts 21.
[0048] Please see Figure 2 An aggregating box 22 is installed in the upper part of the inner cavity of the feeding hopper 3. A discharge channel 23 is installed at the bottom of the aggregating box 22. The bottom of the discharge channel 23 is connected to the inner cavity of the conveying pipe 7. Waste tire pyrolysis carbon black can be injected into the conveying pipe 7 through the aggregating box 22.
[0049] The working process of this device is as follows: First, pyrolysis carbon black powder enters the interior of reactor 6 through a feed screw, and simultaneously, the corresponding air inlet 5 valve 17 is opened. Generally, nitrogen is first turned on to remove air from the material. The reactor heating system slowly raises the temperature. Once the specified reaction temperature is reached, the axial vent of the reactor is opened to introduce the required gas, usually chemical solution, water vapor, carbon dioxide, etc. Multiple air inlets 5 can greatly improve the stability of gas entry, making the reaction more complete.
[0050] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0051] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A device for post-processing of carbon black from waste tire pyrolysis, characterized in that, include: A base (1) is provided, and an air intake flow meter (2) is mounted on the surface of the base (1); The feeding bin (3) is located on the left side of the upper surface of the base (1), and the upper surface of the feeding bin (3) is provided with a feeding port (4); The reactor (6) is located on the right side of the upper surface of the base (1). The reactor (6) has air inlets (5) evenly distributed at the feed end, discharge end and side. The number of air inlets (5) at the feed end and discharge end of the reactor (6) is not less than 4. The feed hopper (3) is equipped with a conveying pipe (7) at the lower part. The motor (8) is located on the left side of the conveying pipe (7). The rotor of the motor (8) is coaxially mounted with an auger (9). The discharge port (10) is opened on the right side of the reactor (6). The discharge pipe (101) is located on the right side of the discharge port (10). The discharge pipe (101) is connected to the finished product tank (11). Both sides of the reaction vessel (6) are equipped with gas outlet pipes (102). The gas outlet end of the gas outlet pipe (102) is equipped with a condensation collection tank (103). A vacuum tank (12) is installed on the inner wall of the reactor (6). The inner side of the vacuum tank (12) is provided with a reactor cylinder wall (25). The reactor cylinder wall (25) is connected to the air inlet (5). The reactor cylinder wall is composed of an outer isostatic graphite layer and an inner 316L stainless steel layer, with a 2mm gap between the outer modules. A heating wire (13) is spirally wound between the isostatic graphite layer and the 316L stainless steel layer. A drain port (14) is also installed at the bottom of the reactor (6). (6) has exhaust ports (15) installed on both sides of its upper surface. The exhaust ports (15) are connected to the gas outlet (102). A protective gas inlet (26) is provided next to the exhaust ports (15). The protective gas inlet (26) is connected to the gas inlet (5) on the corresponding side. A condensate inlet (16) and a condensate outlet (24) are installed at the bottom and top of the reactor (6), respectively. A condensate channel is opened outside the inner tube of the exhaust port (15), and the inner tube of the exhaust port (15) is connected to the reactor wall (25).
2. The equipment for post-treatment of waste tire pyrolysis carbon black according to claim 1, characterized in that: Valves (17) are installed on the outside of each air inlet (5).
3. The equipment for post-treatment of waste tire pyrolysis carbon black according to claim 1, characterized in that: An mounting plate (18) is installed on the left side of the feed hopper (3), and the motor (8) is installed on the upper surface of the mounting plate (18).
4. The equipment for post-treatment of waste tire pyrolysis carbon black according to claim 1, characterized in that: The bottom of the drain outlet (14) is equipped with a sealing flange (19), and the bottom of the sealing flange (19) is provided with a sealing cover plate (20).
5. The equipment for post-treatment of waste tire pyrolysis carbon black according to claim 4, characterized in that: The bottom of the sealing cover plate (20) is evenly screwed with bolts (21), and the upper part of each bolt (21) is screwed onto the surface of the sealing flange (19).
6. The equipment for post-treatment of waste tire pyrolysis carbon black according to claim 1, characterized in that: An aggregating box (22) is installed on the upper part of the inner cavity of the feeding hopper (3), and a discharge channel (23) is installed at the bottom of the aggregating box (22). The bottom of the discharge channel (23) is connected to the inner cavity of the conveying pipe (7).