Grinding and granulating equipment for superfine modified regenerated carbon black

Abstract

The utility model relates to superfine modified regenerated carbon black grinding and granulating equipment, and belongs to the field of waste tire pyrolysis recovery equipment.The superfine modified regenerated carbon black grinding and granulating equipment comprises a granulating device and a circulating heating device, the granulating device comprises a barrel, the barrel comprises an inner barrel and an outer barrel, a sealed heating cavity is formed between the inner barrel and the outer barrel, and a drying cavity is formed in the inner barrel; the drying cavity is used for drying modified regenerated carbon black; a hot air inlet and a hot air outlet which are communicated with the heating cavity are formed in the outer cylinder; the circulating heating device comprises a heat supply pipeline, a heating mechanism, a heat return pipeline and a negative pressure mechanism, the two ends of the heat supply pipeline are in sealed connection with the hot air inlet and the heating mechanism respectively, the two ends of the heat return pipeline are in sealed connection with the hot air outlet and the negative pressure side of the negative pressure mechanism respectively, and the positive pressure side of the negative pressure mechanism is in sealed connection with the heating mechanism. The heat energy of the superfine modified regenerated carbon black grinding and granulating equipment is efficiently utilized, and the granulating quality can be guaranteed.

Description

Technical Field

[0001] This application relates to the field of waste tire pyrolysis recycling equipment, and in particular to an ultrafine modified recycled carbon black grinding and granulation equipment. Background Technology

[0002] Methods for processing waste tires include remanufacturing, producing recycled rubber and rubber powder, incineration, and pyrolysis. Among these, waste tire pyrolysis technology involves thermally decomposing waste tires in an oxygen-deficient or inert gas environment, producing pyrolysis gas, pyrolysis oil, and carbon residue. These products can be further processed into high-value products with various applications. Recycled carbon black is one of the products generated from waste tires through pyrolysis technology. Because it differs from traditional carbon black production methods, it is called recycled carbon black.

[0003] Recycled carbon black granulation involves processing moist modified carbon black raw materials into granules using a granulator through continuous rotation and drying. Granulated carbon black is easier to transport and use, while also reducing pollution to the working environment.

[0004] Existing granulators mainly consist of a cylinder, a toothed roller, a drive unit for the toothed roller, and a heating unit. The drive unit drives the toothed roller to rotate, stir, crush, and convey the raw material within the cylinder. The heating unit introduces hot air into the cylinder from below to heat and dry the recycled carbon black raw material. An exhaust port is provided on the cylinder to discharge exhaust gas. However, the hot air from the heat source is discharged after a single heating cycle in the granulator body, and the discharged exhaust gas still has a high temperature, resulting in low energy utilization of the granulator's heating capacity. Utility Model Content

[0005] In order to achieve efficient utilization of thermal energy in ultrafine modified recycled carbon black grinding and granulation equipment, this application provides an ultrafine modified recycled carbon black grinding and granulation equipment.

[0006] The ultrafine modified recycled carbon black grinding and granulation equipment provided in this application adopts the following technical solution:

[0007] An ultrafine modified recycled carbon black grinding and granulation equipment includes a granulation device and a circulating heating device;

[0008] The granulation device includes a cylinder with an inner cylinder and an outer cylinder, a sealed heating chamber is formed between the inner cylinder and the outer cylinder, and a drying chamber is provided inside the inner cylinder for drying modified recycled carbon black;

[0009] The outer cylinder is provided with a hot air inlet and a hot air outlet that communicate with the heating chamber;

[0010] The circulating heating device includes a heat supply pipeline, a heating mechanism, a heat return pipeline, and a negative pressure mechanism. One end of the heat supply pipeline is sealed to the hot air inlet, and the other end of the heat supply pipeline is sealed to the heating mechanism. One end of the heat return pipeline is sealed to the hot air outlet, and the other end of the heat return pipeline is sealed to the negative pressure side of the negative pressure mechanism. The positive pressure side of the negative pressure mechanism is sealed to the heating mechanism.

[0011] By adopting the above scheme, the granulation device is combined with a circulating heating device, forming a closed-loop external heating and internal circulation thermal energy circulation system through the heating mechanism, heat supply pipeline, heating chamber, reheat pipeline, and negative pressure mechanism. The heating mechanism enables the furnace temperature of the granulation device to reach 600℃. This high temperature not only significantly improves the utilization rate of thermal energy but also ensures the uniform distribution of internal temperature during carbon black production, improving the consistency and overall quality of the produced carbon black, thereby ensuring the high quality of the final product. The high-temperature gas generated by the heating mechanism enters the heating chamber through the heat supply pipeline. The waste heat gas is then drawn back to the heating mechanism for secondary heating and utilization through the negative pressure mechanism, avoiding the heat loss caused by the direct discharge of hot air in traditional equipment, improving the thermal utilization rate, and reducing energy loss. At the same time, the negative pressure mechanism in the circulating heating device not only drives the hot air circulation but also precisely controls the flow rate and volume of the hot air by adjusting the negative pressure, thereby achieving precise control of the temperature field and airflow field within the drying chamber. This stable and uniform drying environment effectively avoids problems such as clumping, sticking, or excessive particle size differences caused by uneven drying of carbon black particles, ensuring the stability of subsequent granulation processes from the source and improving product yield and quality.

[0012] Preferably, the outer cylinder is provided with at least three hot air inlets, all of which are evenly distributed along the axial direction of the outer cylinder, and the heat delivery pipeline is provided with at least three branch pipes, all of which are sealed to each of the hot air inlets.

[0013] By adopting the above scheme, multiple hot air inlets are distributed at intervals along the axial direction of the outer cylinder, allowing high-temperature hot air to be injected into the heating chamber simultaneously from different axial positions of the outer cylinder. This forms a balanced heat flow field along the length of the inner cylinder, enabling the hot air to enter the heating chamber more evenly. Combined with the negative pressure mechanism to regulate the heat of the entire system, multiple inlets ensure axial temperature uniformity, the circulation system ensures stable circumferential heat flow, and the negative pressure mechanism dynamically balances the heat flow velocity in each area. Ultimately, a three-dimensional uniform temperature field with no axial gradient and no dead angles in the circumference is formed in the drying chamber, avoiding local overheating or underheating. This ensures the consistency of the axial drying rate of the modified recycled carbon black in the drying chamber and avoids local over-drying or uneven moisture content caused by differences in material residence time. The hot air distribution is more effective, and the heating efficiency is higher. Considering the characteristic that the surface functional groups of ultrafine modified carbon black are prone to failure due to high temperature, the quality of the product output is improved under the condition of uniform and stable temperature.

[0014] Preferably, the circulating heating device further includes an air intake pipe, an air outlet is provided on the inner cylinder, one end of the air intake pipe passes through the outer cylinder in a sealed manner and is sealed to the air outlet, and the other end of the air intake pipe is connected to the heating mechanism.

[0015] By adopting the above scheme, the hot and humid waste gas in the drying chamber is directly introduced into the heating mechanism through the air intake pipe. The synergistic effect of the air intake pipe and the negative pressure mechanism creates a micro-negative pressure environment in the drying chamber. Under negative pressure, the boiling point of the moisture on the material surface decreases. Combined with the uniform temperature field of the heating chamber, this increases the diffusion rate of moisture inside the carbon black particles. The air intake pipe and the hot air circulation system of the heating chamber form a double closed-loop coupled structure of external chamber heating, internal chamber drying, and waste gas recovery. The micro-negative pressure environment, combined with the directional air extraction of the air intake pipe, can control the dust concentration in the drying chamber at a low level, avoiding adhesion or agglomeration between particles due to dust accumulation. This improves the dispersibility of the material before granulation and directly reduces the mold blockage rate and particle breakage rate during the granulation process.

[0016] Preferably, a demister is provided in the air intake pipeline.

[0017] By adopting the above scheme, a demister is installed between the air intake pipe and the heating mechanism. The demister separates the water-containing gas generated during drying in the inner cylinder before it enters the heating mechanism, thereby improving the efficiency of heat utilization. Furthermore, the separation of water vapor can prevent scale formation on the heating device.

[0018] Preferably, the outer wall of the inner cylinder is provided with two or more sets of heat-conducting fins, and the two or more sets of heat-conducting fins are spirally distributed around the length direction of the inner cylinder.

[0019] By adopting the above scheme, multi-layer spirally distributed heat-conducting fins are welded to the outer wall of the inner cylinder, which increases the contact area between the hot air and the inner cylinder and converts the straight flow of hot air into spiral motion, thus extending the hot air flow path, prolonging the hot air residence time, improving the heat transfer efficiency, and enabling the granulator to have a higher drying and granulation efficiency within a certain period of time.

[0020] Preferably, the height of the heat-conducting fins is 1 / 3 to 1 / 2 of the width of the heating cavity, and the angle between the heat-conducting fins and the inner cylinder is set to 45°.

[0021] By adopting the above scheme, the angle between the heat-conducting fins and the inner cylinder wall is set to 45°, which breaks the inertia of the axial flow of hot air and forms a vortex generator effect between adjacent fin groups. This can further increase the contact area and contact time between the hot air and the inner cylinder. By adjusting the ratio of fin height to cavity width, Pareto optimality of heat transfer and flow resistance is achieved, thereby improving the granulation efficiency of the granulator and increasing the temperature of waste heat recovery.

[0022] Preferably, the inner wall of the outer cylinder is provided with a groove, and the ratio of the depth of the groove to the height of the heat-conducting fin is 1:1.5.

[0023] By adopting the above scheme, the straight flow of hot air is transformed into a three-dimensional spiral motion through the interaction of fins and grooves, extending the residence time of hot air. The groove depth and fin height are matched in a 1:1.5 ratio to form an alternating expansion-contraction flow channel, resulting in a more uniform temperature field, enhanced heat transfer effect, and improved granulation efficiency of the granulator.

[0024] Preferably, the granulation device further includes a toothed roller, which is disposed inside the drying chamber, and the gap between the toothed roller and the inner wall of the drying chamber is less than 1.2 mm.

[0025] By adopting the above scheme, the gap between the toothed roller and the inner wall of the drying chamber is less than 1.2 mm, which can form a high-intensity shear flow field, improve the breakage rate of ultrafine recycled carbon black agglomerates, enhance the dispersion of single particles, and produce carbon black particles with more uniform size, meeting the quality requirements of high-end tires. Furthermore, the toothed roller can be configured as a spiral shape to form axial and axial composite material flow, making the recycled carbon black raw material more evenly dispersed and heated, thus improving product quality.

[0026] Preferably, the device further includes a discharge device, which includes a primary discharge mechanism and a secondary discharge mechanism. The feed end of the primary discharge mechanism is sealed to the discharge end of the inner cylinder, and the feed end of the secondary discharge mechanism is sealed to the discharge end of the primary discharge mechanism.

[0027] By adopting the above scheme, the primary and secondary cooling mechanisms form a stepped cooling channel. The cooling mechanism uses a combination of spiral guide plates and soft-landing buffer layers to reduce the breakage rate of ultrafine particles and improve the quality of the output. Furthermore, the cooling mechanism is sequentially and sealed to the inner cylinder discharge end, reconstructing a closed thermal circulation system in the open discharge stage. This effectively controls the gradual cooling of the discharged material, eliminating micro-cracks in the particles caused by thermal stress and improving sphericity.

[0028] In summary, this application has the following beneficial effects:

[0029] 1. A closed-loop system is formed through a circulating heating device, allowing waste heat gas to be reused after secondary heating, reducing heat loss and significantly improving heat utilization. The negative pressure mechanism precisely adjusts the hot air velocity and flow rate, and together with multiple axially distributed hot air inlets, forms a three-dimensional uniform temperature field, avoiding local overheating or underheating, thus improving drying efficiency. The air intake pipeline and the negative pressure mechanism work together to lower the boiling point of moisture on the material surface, accelerate internal moisture diffusion, and simultaneously inhibit dust accumulation and reduce particle adhesion and agglomeration. The air intake pipeline has a built-in demister to separate water vapor from the humid waste gas, preventing scaling of the heating mechanism, extending equipment life, and recovering waste heat from the waste gas. The design of fins and grooves extends the hot air residence time, improves heat transfer efficiency, and enhances temperature field uniformity. Combined with the circulating heating and recovery system, this improves heat utilization. Overall, the heat utilization rate is nearly doubled, and energy consumption is greatly reduced.

[0030] 2. The spiral stirring roller promotes uniform heating of the material, avoiding local over-drying and reducing the standard deviation of particle size distribution; the primary and secondary cooling mechanisms cool the material step by step, combined with a soft landing buffer layer, reducing the particle breakage rate; the sealed connection design maintains the integrity of the thermal circulation system, prevents sudden changes in thermal stress during cooling, and ensures the stability of the particle structure; the granulated carbon black has a smaller volume, improved quality, and is convenient for transportation and application by rubber companies.

[0031] Through the synergy of the above technologies, the equipment achieves high efficiency, energy saving, and high precision in the drying and granulation process of ultrafine modified recycled carbon black. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of an embodiment of this application;

[0033] Figure 2 This is a three-dimensional structural diagram of the cylindrical body according to an embodiment of this application;

[0034] Figure 3 This is a cross-sectional structural diagram of the cylinder according to an embodiment of this application.

[0035] Explanation of reference numerals in the attached drawings: 1. Feed hopper; 2. Granulation device; 21. Cylinder; 211. Inner cylinder; 212. Outer cylinder; 22. Hot air inlet; 23. Hot air outlet; 24. Air outlet; 25. Heat-conducting fins; 26. Groove; 27. Agitator roller; 28. Drying chamber; 29. ​​Heating chamber; 3. Circulating heating device; 31. Heat supply pipeline; 311. Branch pipe; 32. Heating mechanism; 33. Regenerative pipeline; 34. Negative pressure mechanism; 4. Air venting pipeline; 41. Demister; 5. Discharge device; 51. Primary ducting mechanism; 52. Secondary ducting mechanism; 6. Valve. Detailed Implementation

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0041] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0042] This application discloses an ultrafine modified recycled carbon black grinding and granulation device. (Refer to...) Figure 1 The system includes a feed hopper 1, a granulation unit 2, a circulating heating unit 3, and a discharge unit 5. The discharge end of the feed hopper 1 is sealed to the feed end of the granulation unit 2, ensuring a sealed environment for the granulation unit 2. The discharge from the feed hopper 1 uses an automatic control structure, such as a solenoid valve, for intelligent control of the discharge rate. The feed hopper 1 contains modified ultrafine recycled carbon black raw material. The modification process includes: grinding the recycled carbon black raw material to a fineness of over 1000 mesh, achieving a sorting machine throughput of D97%, and then adding a certain proportion of additives while controlling the environment to the target temperature to enhance carbon black activity, increase surface ionic activity and adhesion, and achieve a transmittance of over 90% when dissolved in toluene. Furthermore, the moisture content of the ultrafine modified recycled carbon black in the granulation unit 2 is approximately 40%.

[0043] Among them, such as Figures 1 to 3As shown, the granulation device 2 includes a cylinder 21 and a toothed roller 27. The cylinder 21 includes an inner cylinder 211 and an outer cylinder 212. The inner cylinder 211 contains a drying chamber 28 for storing modified recycled carbon black, and the toothed roller 27 is disposed in the drying chamber 28. The toothed roller 27 has spiral teeth that agitate the recycled carbon black, causing the raw material to continuously tumble and change its contact surface with the inner wall of the drying chamber 28. The gap between the ends of the teeth on the toothed roller 27 and the inner wall of the drying chamber 28 is less than 1.2 mm, forming a high-intensity shear flow field. Modified recycled carbon black particles with a diameter less than 1.2 mm can pass smoothly through the gap between the toothed roller 27 and the inner cylinder 211, while particles larger than 1.2 mm will be broken by the teeth. There is a certain distance between the inner cylinder 211 and the outer cylinder 212, forming a sealed heating chamber 29. Four hot air inlets 22 are provided on the lower part of the outer cylinder 212 near the ground, and the four hot air inlets 22 are evenly distributed along the axial direction of the outer cylinder 212. The multiple hot air inlets 22 are spaced apart along the axial direction of the outer cylinder 212, so that high-temperature hot air is simultaneously injected into the heating chamber 29 from different axial positions of the outer cylinder 212, forming a balanced heat flow field along the length of the inner cylinder 211. The hot air inlets 22 connect the outside to the heating chamber 29, and are used to introduce hot air to heat the inner cylinder 211. A hot air outlet 23 is provided on the upper part away from the ground, and the hot air outlet 23 connects the outside to the heating chamber 29, and is used to draw out the airflow with residual heat. Two or more sets of heat-conducting fins 25 are provided on the outer wall of the inner cylinder 211, and the two or more sets of heat-conducting fins 25 are spirally distributed around the length of the inner cylinder 211. The height of the heat-conducting fin 25 is 1 / 3 to 1 / 2 of the width of the heating cavity 29. The heat-conducting fin 25 forms an angle with the outer wall of the inner cylinder 211. The angle can be set to 45° axially upward toward the feed side of the inner cylinder 211. The inner wall of the outer cylinder 212 is provided with a groove 26. The ratio of the depth of the groove 26 to the height of the heat-conducting fin 25 is 1:1.5.

[0044] Among them, such as Figure 1As shown, the circulating heating device 3 includes a heat supply pipe 31, a heating mechanism 32, a regenerative pipe 33, a negative pressure mechanism 34, and an exhaust pipe 4. The heating mechanism 32 is a hot air furnace, which uses electricity and combustible gas to heat the airflow. The negative pressure mechanism 34 can be an exhaust fan. The heat supply pipe 31 is provided with a main pipe and several branch pipes 311. The number of branch pipes 311 corresponds to the number of hot air inlets 22. One end of each branch pipe 311 is sealed to the hot air inlet 22, and the other end is connected to the main pipe. The inlet end of the main pipe is sealed to the outlet of the heating mechanism 32. One end of the regenerative pipe 33 is sealed to the hot air outlet 23, and the other end is sealed to the airflow inlet of the heating mechanism 32. A negative pressure mechanism 34 is provided between the regenerative pipe 33 and the heating mechanism 32. The negative pressure side of the negative pressure mechanism 34 faces the side of the regenerative pipe 33 that connects to the heating chamber 29, and the positive pressure side faces the side of the regenerative pipe 33 that connects to the heating mechanism 32. The heating mechanism 32, the heat supply pipe 31, the heating chamber 29, the regenerative pipe 33, and the negative pressure mechanism 34 form a closed-loop external heating and internal circulation thermal energy system. The high-temperature gas generated by the heating mechanism 32 enters the heating chamber 29 via the heat supply pipe 31, and the waste heat gas is then drawn back to the heating mechanism 32 by the negative pressure mechanism 34 for secondary heating. The negative pressure mechanism 34 can adjust the negative pressure to precisely control the flow rate and volume of the hot air; it can also control the flow rate and volume through flow meters and flow valves. An exhaust valve 6 is installed in the middle section of the regenerative pipe 33, connecting to the flue gas treatment system. When the temperature of the inner cylinder 211 reaches the set value, the valve 6 is opened to discharge the gas to the flue gas treatment system. When producing a batch of carbon black granules, the heating mechanism 32 heats the inner cylinder 211 to approximately 800 degrees Celsius, and then the waste heat is circulated and heated through the induced draft fan and the regenerative pipe 33. An air outlet 24 is provided on the inner cylinder 211. One end of the air intake pipe 4 passes through the outer cylinder 212 in a sealed manner and is connected to the air outlet 24 in a sealed manner. The other end of the air intake pipe 4 is connected to the heating mechanism 32. The air intake pipe 4 directly introduces the humid and hot exhaust gas in the drying chamber 28 into the heating mechanism 32 for utilization. The air intake pipe 4 works in conjunction with the negative pressure mechanism 34 to form a micro-negative pressure environment in the drying chamber 28. A demister 41 is provided between the air intake pipe 4 and the heating mechanism 32. The demister 41 separates the water-containing gas generated during drying in the inner cylinder 211 before it enters the heating mechanism 32, thereby improving the efficiency of heat utilization.

[0045] The discharge device 5 includes a primary descending mechanism 51 and a secondary descending mechanism 52. The granulation device 2 is elevated by a platform and arranged in a stepped manner with the primary descending mechanism 51 and the secondary descending mechanism 52. The feed end of the primary descending mechanism 51 is sealed to the discharge end of the inner cylinder 211, and the feed end of the secondary descending mechanism 52 is sealed to the discharge end of the primary descending mechanism 51. The primary descending mechanism 51 and the secondary descending mechanism 52 adopt a combination design of spiral guide plates and soft landing buffer layers to control the discharge cooling and gradually reduce the temperature during discharge, thereby eliminating the thermal stress of the recycled carbon black particles.

[0046] The implementation principle of the ultrafine modified recycled carbon black grinding and granulation equipment in this application embodiment is as follows: The inner cylinder 211 and the outer cylinder 212 form a heating chamber 29 in the middle. The inner cylinder 211 is continuously heated to a preset temperature for drying and granulation. The heating chamber 29 is connected to the heat recovery pipe 33, which is connected to the heating mechanism 32, forming a hot air circulation path. All connections of the granulation device 2 are sealed. A negative pressure mechanism 34 is set between the heat recovery pipe 33 and the heating mechanism 32. The negative pressure mechanism 34 operates first to create a negative pressure environment inside the granulation equipment, especially at the granulation device 2. The heating mechanism 32 sends hot air into the granulation device 2 through the negative pressure to heat the inner cylinder 211. Then, the hot air is sent from the negative pressure heat recovery pipe 33 through the negative pressure mechanism 34 to the heating mechanism 32. After being appropriately heated again, it is sent to the granulation device 2 for utilization. The entire granulation equipment forms a heat energy utilization circulation system with external heating and internal circulation. Furthermore, water vapor is added to the recycled carbon black raw material during the heating process, creating a high-pressure steam environment inside the granulation furnace. This process promotes the activation of the carbon black particle surface, improving the reactivity and quality of the carbon black. Through this heat treatment, the surface activity of the carbon black particles is significantly enhanced, resulting in superior performance in various industrial applications. The discharge device 5 is also sealed to the granulation device 2, creating a negative pressure within it to recover and reuse the heat dissipated during the cooling of the recycled carbon black particles.

[0047] The ultrafine modified recycled carbon black grinding and granulation equipment of this application embodiment is mainly used in the field of waste tire recycling and pyrolysis reuse. After the waste tire is pyrolyzed, preliminary coarse recycled carbon black lumps are produced. The recycled carbon black lumps are further modified by physical grinding and chemical modification by temperature and additives. After being granulated by the granulation equipment of this application, the carbon black granules are reduced in volume, improved in quality, and convenient for transportation and application by rubber companies.

[0048] The granulation equipment for ultrafine modified recycled carbon black in this application embodiment achieves high efficiency, energy saving and high precision in the drying and granulation process of ultrafine modified recycled carbon black.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A superfine modified recycled carbon black grinding granulation equipment, characterized in that, It includes a granulation device (2) and a circulating heating device (3); The granulation device (2) includes a cylinder (21), which has an inner cylinder (211) and an outer cylinder (212). A sealed heating chamber (29) is formed between the inner cylinder (211) and the outer cylinder (212). The inner cylinder (211) has a drying chamber (28) inside, which is used to dry modified recycled carbon black. The outer cylinder (212) is provided with a hot air inlet (22) and a hot air outlet (23) that communicate with the heating chamber (29); The circulating heating device (3) includes a heat delivery pipeline (31), a heating mechanism (32), a heat return pipeline (33), and a negative pressure mechanism (34). One end of the heat delivery pipeline (31) is sealed to the hot air inlet (22), and the other end of the heat delivery pipeline (31) is sealed to the heating mechanism (32). One end of the heat return pipeline (33) is sealed to the hot air outlet (23), and the other end of the heat return pipeline (33) is sealed to the negative pressure side of the negative pressure mechanism (34). The positive pressure side of the negative pressure mechanism (34) is sealed to the heating mechanism (32).

2. The superfine modified reclaimed carbon black grinding and granulating device according to claim 1, characterized in that, The outer cylinder (212) is provided with at least three hot air inlets (22), all of which are evenly distributed along the axial direction of the outer cylinder (212). The heat delivery pipeline (31) is provided with at least three branch pipes (311), and all of the branch pipes (311) are sealed to all of the hot air inlets (22) in a one-to-one correspondence.

3. The superfine modified recycled carbon black grinding and granulating device according to claim 1, characterized in that, The circulating heating device (3) further includes an air intake pipe (4), an air outlet (24) is provided on the inner cylinder (211), one end of the air intake pipe (4) is sealed through the outer cylinder (212) and is sealed to the air outlet (24), and the other end of the air intake pipe (4) is connected to the heating mechanism (32).

4. The superfine modified reclaimed carbon black grinding and granulating device according to claim 3, characterized in that, A demister (41) is provided between the air intake pipe (4) and the heating mechanism (32).

5. The superfine modified recycled carbon black grinding and granulating device according to claim 1, characterized in that, The outer wall of the inner cylinder (211) is provided with two or more sets of heat-conducting fins (25), and the two or more sets of heat-conducting fins (25) are spirally distributed around the length direction of the inner cylinder (211).

6. The superfine modified recycled carbon black grinding and granulating device according to claim 5, characterized in that, The height of the heat-conducting fins (25) is 1 / 3 to 1 / 2 of the width of the heating cavity (29), and the angle between the heat-conducting fins (25) and the inner cylinder (211) is set to 45°.

7. The superfine modified recycled carbon black grinding and granulating device according to claim 6, characterized in that, The inner wall of the outer cylinder (212) is provided with a groove (26), and the ratio of the depth of the groove (26) to the height of the heat-conducting fin (25) is 1:1.

5.

8. The superfine modified recycled carbon black grinding and granulating device according to claim 1, characterized in that, The granulation device (2) further includes a toothed roller (27), which is disposed in the drying chamber (28), and the gap between the toothed roller (27) and the inner wall of the drying chamber (28) is less than 1.2 mm.

9. The superfine modified recycled carbon black grinding and granulating device according to claim 1, characterized in that, It also includes a discharge device (5), which includes a primary discharge mechanism (51) and a secondary discharge mechanism (52). The feed end of the primary discharge mechanism (51) is sealed to the discharge end of the inner cylinder (211), and the feed end of the secondary discharge mechanism (52) is sealed to the discharge end of the primary discharge mechanism (51).

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