Waste rubber thermal cracking carbon black granulating device

Abstract

The invention relates to a waste rubber thermal cracking carbon black granulating device, and belongs to the technical field of carbon black processing. The stirring device is characterized in that the stirring shaft is of a hollow structure, and an inner annular containing cavity is formed; and a set of carbon black powder circulating assembly is arranged at the discharge end of the shell. The assembly comprises a fixed flow guide cover, a circulating fan rotating along with the stirring shaft and a wind gathering cover. During working, the circulating fan generates suction force, ungranulated carbon black powder suspended in the shell is sucked into the outer annular containing cavity formed between the flow guide cover and the inner wall of the shell, and then the ungranulated carbon black powder is fed into the inner annular containing cavity of the stirring shaft through the air gathering cover. Part of the needle rods on the stirring shaft are hollow, and the inner channels of the needle rods are communicated with the inner annular containing cavity, so that the recycled carbon black powder is sprayed back to the main granulation area again. According to the invention, through the design of internal circulation of powder, suspended dust which is easy to adhere to the wall is actively removed, and closed-loop recycling of raw materials is realized, so that efficient granulation is ensured, materials are effectively prevented from adhering to the inner wall, and the rate of finished products and the quality of granules are remarkably improved.

Description

Technical Field

[0001] This invention relates to a waste rubber pyrolysis carbon black granulation device, belonging to the field of carbon black processing technology. Background Technology

[0002] Tire pyrolysis is an important resource recycling technology, and one of its products, pyrolytic carbon black, has high application value. However, pyrolytic carbon black is usually a loose, fine powder with low density and is easily dispersed, making it inconvenient for storage, transportation, and downstream applications. Therefore, it needs to be processed into a granulated product with higher density and better flowability using granulation equipment.

[0003] Existing carbon black granulation equipment typically adopts a horizontal cylindrical structure with a built-in rotating agitator shaft containing multiple sets of needle bars or paddles. By spraying in a binder (such as water) and utilizing the mechanical stirring, shearing, and extrusion action of the agitator shaft, carbon black powder is agglomerated into granules.

[0004] The inventors have discovered at least the following technical problems in the prior art: If the shell design is too long, material will adhere severely to the walls, making cleaning and maintenance difficult. During the granulation process, in the particle extrusion section at the rear of the shell, due to the lack of mechanical scraping, a thick layer gradually accumulates on the upper inner wall. This easily contaminates the equipment and affects product quality. Therefore, the equipment needs to be shut down periodically for manual cleaning, resulting in low production efficiency and high maintenance costs.

[0005] If the shell design is too short, the particle efficiency and yield will be low: During the material's movement from the inlet to the outlet, some carbon black powder fails to mix fully with the binder or is not effectively agglomerated, arriving at the outlet as dust. If this ungranulated powder is discharged directly with the finished product, it will reduce product quality and uniformity; if it is collected by the dust removal system, it will waste raw materials, directly reducing the yield per process and overall economic benefits. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a waste rubber pyrolysis carbon black granulation device, which effectively overcomes the problems of material sticking to the wall and cleaning and maintenance, while avoiding low granulation efficiency and low yield.

[0007] The waste rubber pyrolysis carbon black granulation device of the present invention includes a support frame, on which a housing is mounted. The housing has a feed inlet, a discharge outlet, and a water inlet. A rotatable stirring shaft is installed inside the housing. A motor for driving the stirring shaft is mounted on a support frame on one side of the housing. The stirring shaft is equipped with spiral blades for pushing the carbon black powder and a needle-bar assembly for granulation. The agitator shaft has an inner annular cavity inside; A carbon black powder circulation component is installed inside the shell at one end of the discharge port; The carbon black powder circulation assembly includes a flow guide hood, an air-gathering hood, and a circulation fan. The housing is equipped with a matching flow guide hood, and an outer annular receiving cavity is formed between the outer surface of the flow guide hood and the inner surface of the housing. An air-gathering hood is connected to a stirring shaft inside the flow guide hood, and a circulation fan is connected to a stirring shaft inside the air-gathering hood. The circulation fan is used to draw ungranulated carbon black powder in the housing into the outer annular receiving cavity. The air-gathering port of the air-gathering hood is connected to the inner annular receiving cavity, and the circulation fan is used to send the carbon black powder in the outer annular receiving cavity into the inner annular receiving cavity. A conical section is provided at the end of the flow guide hood away from the circulation fan. The needle bar assembly includes at least a first needle bar group, which consists of multiple needle bars arranged in a continuous spiral. Some needle bars in the first needle bar group extend to one side of the inner periphery of the conical section, while the needle bars that do not extend to one side of the inner periphery of the conical section are hollow. Their internal channels are all connected to the inner annular receiving cavity. Carbon black powder in the inner annular receiving cavity is fed into the internal channels of the needle bar through a circulation fan, thereby being ejected at one end of the needle bar near the inner periphery of the housing.

[0008] Furthermore, the needles of the first needle bar group are arranged in a continuous double helix.

[0009] Furthermore, at least one second set of needles is arranged in a row after the first set of needles.

[0010] Furthermore, a third needle bar group is arranged after the second needle bar group. The needle bars in the third needle bar group are also arranged in a continuous manner, and the spiral direction of the needle bars in the third needle bar group is opposite to that of the first needle bar group.

[0011] Furthermore, the pitch of the needle rods in the first needle rod group gradually decreases along the material conveying direction.

[0012] Furthermore, the second needle bar group is arranged corresponding to the outlet position, and the guide shroud is provided with an inner outlet. The inner outlet is provided with a threaded outlet sleeve, which can extend from the outlet and be threadedly connected to the inner outlet.

[0013] Furthermore, the stirring shaft includes a main shaft and a detachable hollow shaft. The hollow shaft is connected to the main shaft via a spline. The main shaft is provided with a positioning plate and a positioning boss. One end of the hollow shaft at the spline connection abuts against the positioning plate, and the other end of the hollow shaft away from the spline connection is fixed to the main shaft by a hollow pressure plate.

[0014] Furthermore, an annular baffle is provided at one end of the hollow shaft where the wind-gathering shroud is installed. A gap is reserved between the outer periphery of the annular baffle and the inner periphery of the guide shroud, and the wind-gathering shroud is connected to the annular baffle.

[0015] Furthermore, the fairing is slidably installed into the housing. At least two sets of hollow fixing plates are provided on the outer periphery of the fairing, and a positioning ring is provided on the inner periphery of the housing. When the fairing is slidably installed into the housing, the innermost hollow fixing plate abuts against the positioning ring, and the outer hollow fixing plate is fixed by welding or threading to the threaded ring in the housing.

[0016] Furthermore, the agitator shaft is equipped with spiral blades at the feed inlet position of the housing.

[0017] Compared with the prior art, the beneficial effects of the present invention are: This invention fundamentally solves the design contradiction in existing technologies, namely, the tendency of long shells to stick to the walls and the low yield of short shells, through a carbon black powder recycling component. This device ensures a sufficiently long granulation stroke for efficient granulation while actively recovering suspended dust and spraying the emitted carbon black powder onto the inner periphery of the shell, thus preventing material adhesion and accumulation in the upper rear section of the shell.

[0018] This invention achieves a closed-loop internal circulation, significantly improving the yield: The recovered carbon black fine powder is not treated as waste, but is fed into the inner annular receiving cavity of the stirring shaft through a circulating fan and a concentrator, and is finally "re-fed" to the main granulation zone through hollow needle rods. This highly efficient closed-loop internal circulation design reuses raw material powder that might have escaped with the airflow or been collected by the dust removal system, while preventing the upper part of the inner periphery of the shell from sticking due to a lack of carbon black powder, ensuring maximum material conversion, thereby significantly improving the yield and economic benefits of a single granulation process.

[0019] This invention combines the segmented and differentiated design of the first, second, and third needle rod groups (such as variable pitch compression and reverse spiral slow finishing) to achieve refined control over the material from mixing, nucleation, growth to compaction and molding, resulting in denser, rounder, and more uniform carbon black particles.

[0020] Compared to existing technologies that use external circulation systems (such as external cyclone separators, bag filters, and then conveyors to return the feed to the inlet), the internal circulation design of this invention highly integrates recycling and reuse functions within the main body of the granulator. This not only greatly saves floor space and reduces equipment investment and maintenance costs, but more importantly, the circulation process is completed instantaneously inside the equipment, avoiding the risk of secondary pollution from external circulation, and resulting in higher energy utilization efficiency for the entire system. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall installation structure according to an embodiment of the present invention; Figure 2 This is a partial cross-sectional structural schematic diagram of an embodiment of the present invention; Figure 3 This is a front view of an embodiment of the present invention; Figure 4 yes Figure 3 Schematic diagram of the full cross-section at point AA; Figure 5 yes Figure 4 Enlarged view of a section at point B in the middle; Figure 6 yes Figure 5 Enlarged view of a section at point C; Figure 7 yes Figure 5 Enlarged view of a section at point D; Figure 8 This is a schematic diagram of the stirring shaft structure according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the hollow shaft structure according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the spindle structure according to an embodiment of the present invention.

[0022] Figure 11 This is a schematic diagram of the flow guide structure according to an embodiment of the present invention; Figure 12 This is a schematic diagram of the overall layout structure of an embodiment of the present invention; Figure 13 This is a structural schematic diagram of an embodiment of the present invention.

[0023] In the picture: 1. Shell; 11. Inlet; 12. Outlet; 121. Annular protruding ring; 13. Water inlet; 14. Positioning ring; 15. Threaded ring; 2. Stirring shaft; 21. Hollow shaft; 211. Annular baffle; 212. Hollow pressure plate; 22. Main shaft; 221. Positioning plate; 222. Positioning boss; 3. Spiral blades; 4. First needle bar group; 41. Internal channel; 5. Second needle bar group; 6. Third needle bar group; 7. Flow deflector; 71. Conical section; 72. Hollow fixed plate; 73. Inner outlet; 74. Discharge sleeve; 8. Circulating fan; 9. Air concentrator; 91. Flange; 100. Outer annular cavity; 200. Inner annular cavity. Detailed Implementation

[0024] Example like Figures 1 to 13As shown, this invention discloses a waste rubber pyrolysis carbon black granulation device. Its overall structure includes a support frame, on which a horizontal housing 1 is securely mounted. The housing 1 has an inlet 11 for feeding raw materials, an outlet 12 for discharging finished products, and a water inlet 13 for adding binder. A rotatable stirring shaft 2 runs through the center of the housing 1. To ensure stable operation, both ends of the housing 1 are sealed with sealing covers. Support plates are welded to the covers, and support seats are bolted to the support plates, providing precise radial and axial support to both ends of the stirring shaft 2. A drive motor is mounted on a support frame on one side of the housing 1. The motor is connected to one end of the stirring shaft 2 via a belt drive mechanism, providing rotational power. Along its axial direction, the stirring shaft 2 has spiral blades 3 for pushing the carbon black powder and a needle-bar assembly for granulation. In actual operation, the carbon black powder is fed from the upstream powder silo through a conveyor cylinder into the inlet 11, falls onto the high-speed rotating spiral blades 3, and is forcibly pushed forward to the needle-bar assembly area. In this area, the material is thoroughly mixed with water or other adhesives sprayed from the water inlet 13 (other adhesive inlets may be provided on the housing 1), and begins to agglomerate into granules under the complex mechanical action of the needle rod.

[0025] One of the core innovations of this invention is that the interior of the stirring shaft 2 is designed as a hollow structure, forming an inner annular receiving cavity 200 that runs through the shaft. This receiving cavity is a key channel for realizing the internal circulation of carbon black powder, used to collect and transport fine powder that has not been granulated.

[0026] To achieve the above functions, an innovative carbon black powder circulation assembly is installed inside the shell 1 at one end of the discharge port 12. This assembly consists of a guide shroud 7, a concentrator shroud 9, and a circulation fan 8. The guide shroud 7 acts as a fixed inner liner, and its outer surface naturally forms an annular channel with the inner wall of the shell 1, namely the outer annular receiving cavity 100. Inside the guide shroud 7, the concentrator shroud 9 and the circulation fan 8 are connected to the stirring shaft 2 and rotate together with it. The high-speed rotation of the circulation fan 8 generates a strong suction effect, drawing the ungranulated carbon black powder suspended inside the shell 1, especially in the rear section, into the outer annular receiving cavity 100. Within this cavity, the powder is guided by the airflow to the concentrator shroud 9. The concentrating effect of the concentrator shroud 9, combined with the thrust of the circulation fan 8, efficiently delivers the recovered carbon black powder into the inner annular receiving cavity 200 of the stirring shaft. At the end of the guide shroud 7 furthest from the circulation fan 8, i.e., closer to the granulation zone, a conical section 71 is provided; this structure has an important function.

[0027] The semi-cone angle α (i.e., the angle between the central axis of the cone and the generatrix) of the conical section 71 is preferably designed to be between 10° and 25°. If the angle is too small, the squeezing effect on the material and the acceleration effect of the airflow will not be obvious; if the angle is too large, it may cause excessive pressure changes and lead to material blockage. The conical section 71 cleverly achieves a dual function: firstly, its constricted inner diameter cooperates with the needle bar on the stirring shaft to form a gradual squeezing and regularization zone for the forward-moving carbon black particles, promoting particle compaction and growth; secondly, the distance between its outer wall and the inner wall of the shell 1 is drastically reduced, forming an annular narrow slit, which is equivalent to the suction port of the outer annular receiving cavity 100. According to the principles of fluid mechanics, the narrowing of the flow channel will cause the flow velocity to increase sharply, thus forming a strong suction force at this point, ensuring that even carbon black powder ejected at high speed from the tip of the needle bar can be quickly captured and sucked into the circulation system.

[0028] The needle-bar assembly is the core actuator for granulation and powder reuse, and it includes at least a first needle-bar group 4. This first needle-bar group 4 consists of multiple needle-bars arranged in a continuous spiral along the stirring shaft. To coordinate with the extrusion action of the conical section 71, a portion of the needle-bars (typically solid needle-bars) extends to the inner periphery of the conical section 71. The remaining portion of the needle-bars is designed as a hollow structure, with its internal channels 41 precisely connected to the inner annular cavity 200 of the stirring shaft. In this way, the carbon black powder stored in the inner annular cavity 200 is uniformly ejected from the ends of the needle-bars near the inner periphery of the housing 1 through these internal channels 41, returning to the main granulation zone to participate in the reaction.

[0029] To achieve better granulation results, the needles of the first needle-bar group 4 are preferably arranged in a continuous double helix. This arrangement can generate a stronger tumbling, shearing and mixing effect on the material.

[0030] Following the first needle bar group 4, at least one second needle bar group 5 is arranged in a row. This group of needle bars is densely arranged in a comb-like pattern, and its main function is to knead and compress the initially formed particles with high intensity, making their structure more compact and their size more uniform. Depending on the needs, the needle bars here can be hollow or solid.

[0031] To further improve particle quality, a third needle bar group 6 can be arranged after the second needle bar group 5. This group of needle bars also consists of multiple needle bars arranged in a continuous spiral, but its key feature is that the spiral direction is opposite to that of the first needle bar group 4. This reverse spiral design creates a resistance and reverse thrust on the advancing material, effectively slowing down the material flow rate in the later stage of the equipment, extending the time for extrusion and polishing, thereby achieving "fine processing" of the particles. The needle bars here can also be hollow or solid.

[0032] In order to achieve progressive compression of the material, the pitch of the needle rods in the first needle rod group 4 is designed to gradually decrease along the material conveying direction, thereby continuously increasing the bulk density of the material while conveying it, laying a good foundation for subsequent granulation.

[0033] In terms of the discharge structure, the second needle bar group 5 (or the last needle bar group) is arranged approximately corresponding to the position of the discharge port 12. A fixed guide shroud 7 has an inner outlet 73 with internal threads for connecting a detachable discharge sleeve 74. During installation, the discharge sleeve 74 passes through the discharge port 12 from outside the equipment, screws into and connects to the inner outlet 73, forming a clear, unobstructed finished product discharge channel. An annular protrusion 121 can also be provided on the inner periphery of the discharge port 12, through which the discharge sleeve 74 passes, serving as a preliminary seal and positioning element. Due to the presence of the circulating fan 8, the entire end of the equipment is under negative pressure, and external air flows inward from the discharge port gap into the outer annular receiving cavity 100. Therefore, even if the seal here is not perfect, dust leakage will not occur.

[0034] An annular protrusion 121 is provided on the inner periphery of the discharge port 12. The discharge sleeve 74 is threaded through the annular protrusion 121 and connected to the inner outlet 73. The annular protrusion 121 achieves a basic sealing function to prevent carbon black powder from flowing out. The gap left here does not affect the overall use. Due to the presence of the circulation fan 8, the air here flows into the inner outer annular receiving cavity 100.

[0035] For ease of maintenance and repair, the agitator shaft 2 adopts a split design, including a main shaft 22 and a detachable hollow shaft 21. The hollow shaft 21 (i.e., the part with the needle bar and inner annular receiving cavity) is connected to the main shaft 22 via a high-load-bearing spline. The main shaft 22 is equipped with a positioning plate 221 and a positioning boss 222 for axial positioning. During installation, one end of the hollow shaft 21 at the spline connection abuts against the positioning plate 221, while the end away from the spline is secured with screws via a hollow pressure plate 212. This structure allows for easy disassembly and replacement of the severely worn needle bar portion without replacing the entire agitator shaft.

[0036] In terms of detailed design, one end of the hollow shaft 21 that mounts the wind-concentrating shroud 9 is equipped with an annular baffle 211. A precise gap is reserved between the outer periphery of the baffle and the inner periphery of the fixed guide shroud 7 to avoid interference between the rotating and fixed components. The wind-concentrating shroud 9 is firmly connected to the annular baffle 211, which prevents material from passing through.

[0037] The air deflector 7 is slidably installed into the housing 1. At least two sets of hollow fixing plates 72 are provided on the outer periphery of the air deflector 7. The inner periphery of the housing 1 is provided with a positioning ring 14. When the air deflector 7 is slidably installed into the housing 1, the innermost hollow fixing plate 72 abuts against the positioning ring 14 to achieve axial positioning. The outer hollow fixing plate 72 is fixed by welding or threading to the threaded ring 15 inside the housing 1.

[0038] As a feeding aid, the stirring shaft 2 is equipped with spiral blades 3 at the position of the feed inlet 11 of the housing 1 to ensure that the incoming material can be quickly and stably fed into the granulation zone.

[0039] like Figure 6 As shown, the wind-concentrating cover 9 is also provided with a flange 91 extending to one side. The flange 91 forms an outer cover around the circulation fan 8, making the air blown out by the circulation fan 8 more concentrated.

[0040] Working principle: The closed-loop internal circulation principle of suspended dust is key to solving the problems of material sticking to the walls and low yield. The high-speed rotation of the circulation fan 8 at the end of the equipment creates a strong negative pressure zone at the inlet of the annular channel (outer annular receiving cavity 100) formed between the fixed guide hood 7 and the inner wall of the shell 1 due to channel contraction. This negative pressure actively captures and draws in all suspended, ungranulated carbon black fine powder within the machine. These captured fine powders are carried by the airflow, collected by the wind-gathering hood 9, and, under the pressure of the circulation fan 8, enter the central cavity of the rotating agitator (inner annular receiving cavity 200). The stable positive pressure formed within the cavity causes the recovered powder to be re-injected evenly back into the main granulation zone through the hollow needle rod end connected to the cavity, in a "secondary feeding" manner. This process forms a highly efficient closed-loop circulation, achieving immediate recovery and 100% reuse of fine powders.

[0041] Segmented Enhanced Granulation Principle: This principle aims to produce high-quality granules through a refined mechanical process. The needle-bar assembly on the stirring shaft is functionally divided into three segments: The first section (first needle bar group): adopts a variable pitch double helix design, which undertakes the function of "rapid mixing and compression nucleation". Here, the material is forced to be conveyed, violently tumbled and mixed, and subjected to gradually increasing axial compression, which promotes the rapid wetting of powder and binder and the formation of initial particle nuclei.

[0042] The second section (second needle bar group): adopts a densely arranged "comb-like" structure, undertaking the function of "high-intensity kneading and densification". The initially formed particles are subjected to repeated, high-frequency shearing, collision and kneading in this area, causing the particles to grow, expel internal air, and make the structure more compact.

[0043] The third section (third needle bar group): adopts a reverse spiral design and undertakes the function of "slow finishing and polishing". It creates a retarding effect on the material, prolonging the residence time of the material in the latter part of the equipment. The particles are subjected to continuous and gentle compression and surface polishing, ultimately obtaining a finished product with high roundness and uniform density.

[0044] Utilizing particle growth to achieve physical separation and selective adsorption: The granulation process of this invention is a continuous growth process from powder to granules. The material enters from the feed inlet at the front of the equipment, and under the sequential action of the first and second needle rod groups, the carbon black powder undergoes the evolution of "wetting and nucleation - kneading and growth - extrusion and densification". This means that along the axial direction of the stirring shaft, the average particle size of the material increases unidirectionally and continuously.

[0045] The intake of the circulation system (the annular gap between the conical section of the flow guide and the inner wall of the shell) is located at the end of the granulation process. At this location, most of the material has already formed into qualified or nearly qualified particles of relatively large size and mass, which settle and tumble in the lower half of the shell due to their own gravity. Only a very small number of fine powders that have not participated in agglomeration and retain their original particle size will be suspended in the upper space of the shell due to agitation.

[0046] The negative pressure airflow generated by the circulating fan is precisely designed so that its energy is only sufficient to capture and draw these lightweight, suspended fine powders from the upper space into the outer annular containment cavity, but completely insufficient to overcome the gravity of the larger particles that have already formed a certain mass, and thus unable to remove them from the material flow in the lower half of the equipment. Therefore, this invention achieves a precise, passive physical screening based on the particle growth stage and spatial location.

[0047] Intrinsically safe anti-clogging design based on size screening: Due to the aforementioned physical screening mechanism, the material that can enter the circulation system (outer annular cavity - inner annular cavity - hollow needle bar channel) is essentially only carbon black powder of the original size.

[0048] Work process: like Figure 5 As indicated by the middle arrow, the circulating fan is always running. Any fine powder that is stirred up inside the machine is captured by the negative pressure zone at the end and sent back to the front end area of ​​the first needle bar group in real time via the path of "outer annular receiving cavity 100 - wind concentrator 9 - inner annular receiving cavity 200 - internal channel 41 in the needle bar", where it mixes with the newly entered material and seamlessly participates in the new round of granulation process.

[0049] The descriptions of the orientation and relative positional relationships of the structures in this invention, such as front, back, left, right, up, and down, do not constitute a limitation of this invention, but are merely for the convenience of description.

Claims

1. A waste rubber pyrolysis carbon black granulation device, comprising a support frame, a housing (1) mounted on the support frame, a feed inlet (11), a discharge outlet (12) and a water inlet (13) correspondingly provided on the housing (1), a rotatable stirring shaft (2) provided inside the housing (1), a motor for driving the stirring shaft (2) to rotate mounted on the support frame on one side of the housing (1), and a spiral blade (3) for pushing carbon black powder and a needle rod assembly for granulation on the stirring shaft (2), characterized in that: The inside of the stirring shaft (2) is provided with an inner annular receiving cavity (200); A carbon black powder circulation component is provided at one end of the shell (1) located at the discharge port (12); The carbon black powder circulation assembly includes a flow guide hood (7), a wind concentrator hood (9), and a circulation fan (8). The housing (1) is provided with a matching flow guide hood (7). An outer annular cavity (100) is formed between the outer surface of the flow guide hood (7) and the inner surface of the housing (1). The wind concentrator hood (9) is connected to the stirring shaft (2) inside the flow guide hood (7). The circulation fan (8) is connected to the stirring shaft (2) inside the wind concentrator hood (9). The circulation fan (8) is used to suck the ungranulated carbon black powder in the housing (1) into the outer annular cavity (100). The air concentrator hood (9) is connected to the inner annular cavity (200). The circulation fan (8) is used to send the carbon black powder in the outer annular cavity (100) into the inner annular cavity (200). A conical section (71) is provided at the end of the flow guide hood (7) away from the circulation fan (8). The needle bar assembly includes at least a first needle bar group (4), which is composed of multiple needle bars arranged in a continuous spiral. Some needle bars in the first needle bar group (4) extend to one side of the inner periphery of the conical section (71), while the needle bars that do not extend to one side of the inner periphery of the conical section (71) are hollow. Their internal channels (41) are all connected to the inner annular receiving cavity (200). The carbon black powder in the inner annular receiving cavity (200) is sent into the internal channel (41) of the needle bar through the circulation fan (8), so that it is sprayed out at one end of the needle bar near the inner periphery of the housing (1).

2. The waste rubber pyrolysis carbon black granulation device according to claim 1, characterized in that, The needles of the first needle bar group (4) are arranged in a continuous double helix.

3. The waste rubber pyrolysis carbon black granulation device according to claim 2, characterized in that, At least one second set of needles (5) is arranged in a row after the first set of needles (4).

4. The waste rubber pyrolysis carbon black granulation device according to claim 3, characterized in that, After the second needle bar group (5), a third needle bar group (6) is arranged. The needle bars in the third needle bar group (6) are also arranged in a continuous manner. The spiral direction of the needle bars in the third needle bar group (6) is opposite to that of the spiral direction of the first needle bar group (4).

5. The waste rubber pyrolysis carbon black granulation device according to claim 4, characterized in that, In the first needle bar group (4), the needle bar pitch gradually decreases along the material conveying direction.

6. The waste rubber pyrolysis carbon black granulation apparatus according to claim 3, characterized in that, The second needle bar group (5) is arranged at the position corresponding to the discharge port (12). The guide shroud (7) is provided with an inner outlet (73). The inner outlet (73) is provided with a threaded discharge sleeve (74). The discharge sleeve (74) can extend from the discharge port (12) and be threadedly connected to the inner outlet (73).

7. The waste rubber pyrolysis carbon black granulation apparatus according to claim 1, characterized in that, The stirring shaft (2) includes a main shaft (22) and a detachable hollow shaft (21). The hollow shaft (21) is connected to the main shaft (22) via a spline. The main shaft (22) is provided with a positioning plate (221) and a positioning boss (222). One end of the hollow shaft (21) at the spline connection abuts against the positioning plate (221). The other end of the hollow shaft (21) away from the spline connection is fixed to the main shaft (22) by a hollow pressure plate (212).

8. The waste rubber pyrolysis carbon black granulation apparatus according to claim 1, characterized in that, The hollow shaft (21) has an annular baffle (211) at one end where the wind-gathering shroud (9) is installed. The outer periphery of the annular baffle (211) and the inner periphery of the guide shroud (7) are reserved with a gap. The wind-gathering shroud (9) is connected to the annular baffle (211).

9. The waste rubber pyrolysis carbon black granulation device according to claim 1, characterized in that, The deflector (7) is slidably installed into the housing (1). At least two sets of hollow fixing plates (72) are provided on the outer periphery of the deflector (7). A positioning ring (14) is provided on the inner periphery of the housing (1). When the deflector (7) is slidably installed into the housing (1), the innermost hollow fixing plate (72) abuts against the positioning ring (14). The outer hollow fixing plate (72) is fixed by welding or threading to the threaded ring (15) inside the housing (1).

10. The waste rubber pyrolysis carbon black granulation apparatus according to claim 1, characterized in that, The agitator (2) is provided with a spiral blade (3) at the feed inlet (11) of the housing (1).

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