A deep processing system and method for recycling and utilizing waste tire pyrolysis regenerated carbon black

Abstract

The present application belongs to the technical field of carbon black deep processing, and discloses a deep processing system and method for recycling waste tire pyrolysis regenerated carbon black. The system comprises a carbon black powder conveying mechanism, a bulk material mechanism, a first iron removal mechanism and a second iron removal mechanism; after being conveyed, the carbon black raw material enters the bulk material mechanism for diffusion and falling, and sequentially passes through the first iron removal mechanism and the second iron removal mechanism to remove metal impurities. The carbon black after impurity removal is sequentially subjected to depolymerization, fractional deashing, low-temperature activation, airflow shaping, waste heat drying and screening treatment, to obtain a regenerated carbon black product with uniform particle size and low iron content. The present application can improve the continuous iron removal stability of the crude carbon black and improve the deep processing quality of the regenerated carbon black.

Description

Technical Field

[0001] This invention belongs to the field of carbon black deep processing technology, specifically relating to a deep processing system and method for recycling carbon black from waste tire pyrolysis. Background Technology

[0002] Pyrolysis of waste tires yields pyrolysis carbon black, a reusable solid carbon resource. After further processing, including impurity removal, deagglomeration, deashing, activation, shaping, drying, and sieving, pyrolysis carbon black can be used in rubber, plastics, and composite materials. Because waste tires typically contain steel wire, metal cord, and other metal reinforcing materials, pyrolysis carbon black easily carries steel wire fragments, iron filings, and fine iron impurities during pyrolysis, initial crushing, and collection. Furthermore, pyrolysis carbon black is mostly in powder or agglomerated granular form, exhibiting poor material flowability and dispersion uniformity. In continuous deep processing, metal impurities can easily enter subsequent processing steps along with the carbon black powder.

[0003] In the current deep processing of recycled carbon black from waste tire pyrolysis, impurity removal is typically required before the crude carbon black enters subsequent fine processing to reduce the impact of metallic impurities on the purity, particle size stability, and operating status of the carbon black product. However, in actual processing, the feeding state of the crude carbon black powder is unstable, with the powder easily concentrating or accumulating locally, resulting in insufficient contact between metallic impurities and the impurity removal area. In particular, fine iron impurities mixed in the powder are difficult to separate stably. When metallic impurities are not sufficiently removed, the consistency of product quality in subsequent processes such as deagglomeration, deashing, activation, shaping, drying, and screening will be affected, and the iron content of the finished carbon black will be difficult to control stably, thus affecting the recycling efficiency of recycled carbon black from waste tire pyrolysis.

[0004] Therefore, the existing waste tire pyrolysis recycled carbon black deep processing system still has the following core technical problems: before the crude carbon black enters the subsequent deep processing process, the existing system has insufficient stability in the continuous removal of metal impurities in the carbon black powder, and it is difficult to take into account both the powder dispersion state and the metal impurity removal effect during continuous feeding, which affects the quality stability of the recycled carbon black finished product. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of this invention is to provide a deep processing system and method for recycling carbon black from waste tire pyrolysis, which can solve the above problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A deep processing system for recycling carbon black from waste tire pyrolysis includes a carbon black powder conveying mechanism for storing and conveying the carbon black raw material to be processed. A dispersing mechanism is installed at the discharge position of the carbon black powder conveying mechanism to receive the carbon black powder conveyed by the conveying mechanism and to diffuse the carbon black powder before it falls. A primary iron removal mechanism is installed along the discharge path of the dispersing mechanism to perform a first magnetic attraction removal of metal impurities during the diffusion and descent of the carbon black powder. A secondary iron removal mechanism is installed below the primary iron removal mechanism to perform a second magnetic attraction removal of the carbon black powder after the first iron removal. The carbon black powder sequentially passes through the carbon black powder conveying mechanism, the dispersing mechanism, the primary iron removal mechanism, and the secondary iron removal mechanism to remove metal impurities from the recycled carbon black from waste tire pyrolysis through diffusion discharge and multi-stage magnetic attraction.

[0007] Furthermore, the carbon black powder conveying mechanism is equipped with a frame fixed to the ground. Vertical columns are fixed to both sides of the top of the frame, and a storage bin for storing the carbon black raw material to be processed is fixed between the tops of the two columns. A conveying pipe is horizontally fixed to the bottom of the storage bin, and the conveying pipe is suspended and extends forward. An end plate is fixed to the front end of the conveying pipe to seal the front end. A conveying screw is rotatably installed inside the conveying pipe, and the conveying screw is used to convey the carbon black raw material in the storage bin forward along the conveying pipe by rotation. A discharge port is horizontally opened at the bottom of the conveying pipe, and the discharge port opens downwards. Symmetrical protrusions are arranged on one end of the surface of the conveying pipe near its root.

[0008] Furthermore, the bulk material mechanism is provided with a slide cylinder that is slidably sleeved on the surface of the conveying pipe, and the position of the slide cylinder corresponds to the outlet; the rear end of the slide cylinder is symmetrically provided with a second fixing rod, and the two second fixing rods slide through the corresponding protrusions respectively; a spring is sleeved on the surface of the second fixing rod, and the spring is located between the slide cylinder and the protrusion, and is used to apply a forward thrust to the slide cylinder.

[0009] Furthermore, a first fixing rod is symmetrically arranged at the front end of the slide cylinder, the front end of the first fixing rod extends beyond the front end face of the end plate, and a ball bearing is rolled at the front end of the first fixing rod; a turntable is installed at the front end of the conveying screw, and the turntable is located outside the front end of the slide cylinder; extrusion sloping blocks are evenly arranged on the inner side of the turntable with the axis of the turntable as the center, and the ball bearings correspond to the extrusion sloping blocks; when the conveying screw drives the turntable to rotate, the extrusion sloping blocks push the first fixing rod through the ball bearings, causing the slide cylinder to slide back and forth along the axial direction of the conveying pipe.

[0010] Furthermore, a discharge cylinder is provided at the bottom of the slide cylinder, and the discharge cylinder has a rectangular structure; screen holes are evenly opened between the discharge cylinder and the slide cylinder, and the screen holes coincide with the discharge port, so that the carbon black powder in the conveying pipe enters the discharge cylinder through the discharge port and the screen holes; sliding bolts are evenly arranged on the lower inner wall of the slide cylinder, and the sliding bolts are located between two adjacent screen holes and placed inside the discharge port; two rows of through holes are evenly opened on one side surface of the discharge cylinder, and the upper and lower rows of through holes are staggered.

[0011] Furthermore, the primary iron removal mechanism is provided with a housing fixed on the surface of the discharge cylinder. The housing covers the outside of the upper and lower rows of through holes and is open downwards. A collection box is detachably installed at the bottom of the housing. Sliding holes are evenly opened on the surface of the housing. The sliding holes correspond one-to-one with the through holes, and the size of the through holes is larger than that of the sliding holes.

[0012] Furthermore, cylinders are installed on both sides of the discharge cylinder, with the two cylinders on the same side having the same horizontal height and being controlled synchronously; a connecting plate is installed between the output ends of the two cylinders in the same group, and the connecting plate spans across the outside of the housing; magnetic rods are evenly arranged on the inner side of the connecting plate, and the magnetic rods pass through the sliding hole and the through hole and extend into the discharge cylinder, and the size of the magnetic rods is adapted to the sliding hole; the cylinders are used to drive the connecting plate and the magnetic rods to move outward of the housing, so that the metal impurities adsorbed on the surface of the magnetic rods are blocked when passing through the sliding hole and fall into the collection box.

[0013] Furthermore, the secondary iron removal mechanism is located below the conveying pipe. The secondary iron removal mechanism has a base, and upright plates are symmetrically installed on the surface of the base. A roller is rotatably installed between the two upright plates. A reduction motor is fixed to the outside of one of the upright plates, and the reduction motor is used to control the rotation of the roller. A magnetic block is fixed between the two upright plates, and the magnetic block is eccentrically located inside the roller. A discharge plate is inclined between the two upright plates. The discharge cylinder is located above the roller and biased to one side of the magnetic block, so that the carbon black powder processed by the primary iron removal mechanism falls onto the surface of the roller, and secondary magnetic iron removal is performed by the cooperation of the roller and the magnetic block.

[0014] A deep processing method for recycling carbon black from waste tire pyrolysis includes the following steps: S1. Place the crude carbon black raw material inside the carbon black powder conveying mechanism, and achieve automatic feeding through the carbon black powder conveying mechanism; S2. Multi-stage magnetic separation is performed to remove impurities. The carbon black powder first passes through a primary iron removal mechanism to remove large pieces of steel wire and iron filings, and then passes through a secondary iron removal mechanism to remove fine iron impurities attached to the surface of the carbon black particles, so that the iron content of the finished product is ≤0.3%. S3. The impurity-removed coarse carbon black is fed into a special horizontal impact mill. Under a closed negative pressure environment, the agglomerated carbon black is impacted and sheared by a high-speed rotating impact rotor to deagglomerate the agglomerated particles. The inorganic ash shell on the surface of some carbon black particles is peeled off by the hardness difference between carbon black and ash. After deagglomeration, the particle size is controlled at 100-500μm. S4. The deagglomerated carbon black enters a multi-stage vortex classifier. Utilizing the density difference between carbon black and inorganic ash, the airflow speed is adjusted to allow the light carbon black particles to rise with the airflow and enter the next process, while the heavy ash settles under gravity and is discharged from the bottom of the classifier, achieving physical deashing. After deashing, the carbon black ash content is reduced to 6%-10%. S5. The graded carbon black is fed into a special low-temperature activation mill. The mill chamber is equipped with a jacket for cooling, and the cooling temperature is controlled at 50-80℃. The surface of the carbon black particles is micro-activated by the mechanical force of high-energy ball milling, which increases the surface roughness and specific surface area, and increases the specific surface area to 80-120m² / g. S6. The activated carbon black is fed into a supersonic airflow shaping machine. The supersonic airflow is used to collide and rub the carbon black particles, shaping the irregular carbon black particles into round and uniform particles. After shaping, the particle size D50 is controlled at 30-80nm and D90≤100nm. S7. Utilizing the waste heat from the waste tire pyrolysis system, the shaped carbon black is fed into a waste heat dryer at a waste heat temperature of 120-150℃ and dried until the moisture content is ≤0.8%. S8. After drying, the carbon black is screened through a precision vibrating screen to remove large particles that do not meet the standards, so that the qualified products after screening can enter the finished product buffer silo.

[0015] A deep processing method for recycling carbon black from waste tire pyrolysis is disclosed. In step S2, crude carbon black raw material enters the conveying pipe from the storage tank and is conveyed forward by the conveying screw. The conveying screw drives the turntable to rotate synchronously. The extrusion blocks on the turntable push the slide cylinder to slide back and forth along the axial direction of the conveying pipe through the ball bearings, so that the carbon black powder diffuses and falls through the discharge port and the sieve holes. During the fall, the carbon black powder passes through the magnetic bars of the primary iron removal mechanism and completes the first iron removal. Then it falls onto the drum of the secondary iron removal mechanism. Metal impurities are adsorbed onto the surface of the drum under the action of the magnetic blocks. Qualified carbon black powder falls into the discharge plate. The metal impurities adsorbed on the surface of the drum fall downwards after the drum rotates out of the range of the magnetic blocks.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention utilizes a sequential coordination of a carbon black powder conveying mechanism, a dispersing mechanism, a primary iron removal mechanism, and a secondary iron removal mechanism. This allows waste tire pyrolysis recycled crude carbon black to be continuously processed according to a process of storage and conveying, diffusion feeding, primary magnetic iron removal, and secondary magnetic iron removal before entering subsequent deep processing steps. This solution addresses the problem of insufficient stability in removing metal impurities during the continuous feeding process of existing crude carbon black. By connecting the powder conveying process with the iron removal process, the crude carbon black powder completes the separation of metal impurities while in continuous movement, preventing the crude carbon black from entering subsequent deep processing steps without sufficient impurity removal. This, in turn, helps improve the stability of the quality of the recycled carbon black product.

[0017] This invention uses a conveying screw to drive a turntable to rotate synchronously. A combination of an extrusion wedge, balls, a first fixed rod, a slide cylinder, a second fixed rod, and a spring allows the slide cylinder to slide axially back and forth on the outside of the conveying pipe. When coarse carbon black powder enters the discharge cylinder through the outlet and sieve holes, the reciprocating slide cylinder disperses the falling powder. A sliding bolt simultaneously agitates the powder within the outlet, preventing the coarse carbon black powder from accumulating or forming a concentrated flow at the discharge location. This solution solves the problems of unstable coarse carbon black powder feeding and insufficient contact between metal impurities and the impurity removal area caused by concentrated powder falling, providing a more uniform powder flow for subsequent magnetic iron removal.

[0018] This invention incorporates a primary iron removal mechanism along the discharge path of the discharge cylinder, with a magnetic rod extending into the discharge cylinder through sliding holes and through-holes. This allows the diffusing coarse carbon black powder to undergo initial magnetic adsorption and iron removal as it passes the magnetic rod. Simultaneously, a cylinder moves the connecting plate and the magnetic rod outward, preventing metal impurities adsorbed on the surface of the magnetic rod from being blocked as they pass through the sliding holes and fall into the collection box. This design enables the primary iron removal mechanism to clean metal impurities from the surface of the magnetic rod during continuous iron removal, reducing the impact of impurity accumulation on subsequent adsorption processes and thus improving the stability of the continuous iron removal process.

[0019] This invention incorporates a secondary iron removal mechanism below the primary iron removal mechanism, allowing the coarse carbon black powder, after the first iron removal, to continue falling onto the drum surface. During drum rotation, eccentrically positioned magnetic blocks on the inner side of the drum adsorb residual fine iron impurities. Qualified carbon black powder enters the discharge plate, while the iron impurities adsorbed on the drum surface fall off and separate as the drum rotates away from the magnetic attraction area. This solution can further treat the residual fine iron impurities in the coarse carbon black powder on top of the primary iron removal, making the removal of metal impurities more thorough. This reduces the impact of metal impurities on subsequent deagglomeration, deashing, activation, shaping, drying, and sieving processes, making it easier to maintain stable iron content and product quality in the recycled carbon black finished product. Attached Figure Description

[0020] Figure 1 This is a frontal three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the powder conveying mechanism of the present invention; Figure 4 This is a schematic diagram of the outlet location structure of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the slide tube of the present invention; Figure 6 This is a three-dimensional structural diagram of the conveying screw and turntable installation of the present invention; Figure 7 This is a three-dimensional structural diagram of the primary iron removal mechanism of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the magnetic rod of the present invention; Figure 9 This is a three-dimensional structural diagram of the two-stage iron removal mechanism of the present invention; Figure 10 This is a cross-sectional view of the two-stage iron removal mechanism of the present invention; Figure 11 This is a flowchart of the processing method of the present invention.

[0021] The attached diagram lists the components represented by each number as follows: 1. Carbon black powder conveying mechanism; 11. Frame; 12. Column; 13. Storage hopper; 14. Conveying pipe; 141. Discharge port; 142. Protrusion; 15. End plate; 16. Conveying screw; 2. Bulk material handling mechanism; 21. Slide cylinder; 22. First fixed rod; 221. Ball bearing; 23. Second fixed rod; 24. Spring; 25. Discharge cylinder; 26. Through hole; 27. Turntable; 28. Extrusion inclined block; 29. ​​Screen hole; 210. Sliding bolt; 3. Primary iron removal mechanism; 31. Housing; 32. Sliding hole; 33. Collection box; 34. Connecting plate; 35. Magnetic rod; 36. Cylinder; 4. Secondary iron removal mechanism; 41. Base; 42. Vertical plate; 43. Roller; 44. Gear motor; 45. Discharge plate; 46. Magnetic block. Detailed Implementation

[0022] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention. Example

[0023] See Figure 1 , Figure 2 and Figure 11A deep processing system for recycling carbon black from waste tire pyrolysis includes a carbon black powder conveying mechanism 1, a bulk material dispensing mechanism 2, a primary iron removal mechanism 3, and a secondary iron removal mechanism 4. The carbon black powder conveying mechanism 1 is arranged at the feeding end of the overall system, the bulk material dispensing mechanism 2 is arranged at the discharge position of the carbon black powder conveying mechanism 1, the primary iron removal mechanism 3 is arranged on the discharge path of the bulk material dispensing mechanism 2, and the secondary iron removal mechanism 4 is arranged below the primary iron removal mechanism 3, so that the coarse carbon black powder can move continuously in the order of feeding, diffusion discharge, first magnetic iron removal, and second magnetic iron removal.

[0024] To address the issue that recycled coarse carbon black from waste tire pyrolysis is prone to carrying steel wires, iron filings, and fine iron impurities before entering subsequent deep processing, and that the powder tends to concentrate and fall during continuous feeding, the carbon black powder conveying mechanism 1 first stores and conveys the coarse carbon black raw material. The bulk material mechanism 2 receives the coarse carbon black powder sent by the carbon black powder conveying mechanism 1 and causes the coarse carbon black powder to diffuse and fall before entering the iron removal area. The primary iron removal mechanism 3 performs the first magnetic attraction removal of metal impurities during the diffusion and falling process, and the secondary iron removal mechanism 4 performs the second magnetic attraction removal of the coarse carbon black powder after the first iron removal. In this way, the coarse carbon black powder completes dispersion and multi-stage iron removal treatment sequentially during continuous conveying.

[0025] In use, the crude carbon black raw material is first placed inside the carbon black powder conveying mechanism 1, which then conveys the crude carbon black raw material toward the bulk material mechanism 2. When the crude carbon black powder reaches the discharge position of the carbon black powder conveying mechanism 1, the bulk material mechanism 2 receives and disperses the crude carbon black powder, so that the crude carbon black powder does not directly enter the iron removal area in a concentrated flow manner, but forms a diffused state before falling.

[0026] Subsequently, the diffused coarse carbon black powder enters the working area of ​​the primary iron removal mechanism 3. As the coarse carbon black powder passes through the primary iron removal mechanism 3, large pieces of steel wire, iron filings, and other metallic impurities are attracted and retained by the magnetic attraction of the mechanism. After being processed by the primary iron removal mechanism 3, the coarse carbon black powder continues to enter the secondary iron removal mechanism 4. The secondary iron removal mechanism 4 further separates the remaining fine iron impurities through magnetic attraction, allowing the purified coarse carbon black powder to proceed to subsequent deep processing steps.

[0027] After multi-stage magnetic separation for impurity removal, the crude carbon black is further processed using deep processing methods, including impact deagglomeration, vortex classification, low-temperature activation, airflow shaping, waste heat drying, and vibrating sieving. In a complete process, the crude carbon black powder passes sequentially through carbon black powder conveying mechanism 1, dispersing mechanism 2, primary iron removal mechanism 3, and secondary iron removal mechanism 4, and is connected with subsequent deep processing steps to complete the recycling and reuse of carbon black from waste tire pyrolysis. Example

[0028] SeeFigures 1 to 6 The carbon black powder conveying mechanism 1 is equipped with a frame 11, which is fixed to the ground and serves as the supporting foundation for the upper storage and conveying parts. Columns 12 are vertically fixed on both sides of the top of the frame 11, and a storage bin 13 is fixed between the tops of the two columns 12. The storage bin 13 is used to hold the raw carbon black material to be processed, so that the raw carbon black material can be stored in a concentrated manner before entering the conveying stage.

[0029] A conveying pipe 14 is horizontally fixed to the bottom of the storage hopper 13. The conveying pipe 14 is suspended and extends forward. An end plate 15 is fixed to the front end of the conveying pipe 14, which closes the front end of the conveying pipe 14, allowing the crude carbon black raw material entering the conveying pipe 14 to move along the length of the conveying pipe 14. A conveying screw 16 is rotatably installed inside the conveying pipe 14. The conveying screw 16 pushes the crude carbon black raw material forward during rotation. A discharge port 141 is horizontally opened at the bottom of the conveying pipe 14. The discharge port 141 opens downward and is used to discharge the crude carbon black powder conveyed to the corresponding position downward. A protrusion 142 is symmetrically arranged on one end of the surface of the conveying pipe 14 near the root. The protrusion 142 is used to cooperate with the bulk material mechanism 2 to form a sliding limiting base.

[0030] The bulk material handling mechanism 2 is equipped with a slide cylinder 21, which is slidably sleeved on the surface of the conveying pipe 14 and corresponds to the position of the discharge port 141. Symmetrically arranged at the rear end of the slide cylinder 21 are two second fixing rods 23, which slide through corresponding protrusions 142. The sliding engagement between the second fixing rods 23 and the protrusions 142 restricts the axial movement of the slide cylinder 21. A spring 24 is sleeved on the surface of the second fixing rods 23, located between the slide cylinder 21 and the protrusions 142. The spring 24 applies a forward thrust to the slide cylinder 21, causing it to maintain a return-to-position tendency during reciprocating motion.

[0031] A first fixing rod 22 is symmetrically arranged at the front end of the slide cylinder 21. The front end of the first fixing rod 22 extends beyond the front end face of the end plate 15, and a ball bearing 221 is rolled at the front end of the first fixing rod 22. A turntable 27 is installed at the front end of the conveying screw 16. The turntable 27 is located outside the front end of the slide cylinder 21. The inner side of the turntable 27 is evenly arranged with the axis of the turntable 27 as the center. When the conveying screw 16 rotates and drives the turntable 27 to rotate synchronously, the extrusion blocks 28 contact the ball bearing 221 in sequence. The ball bearing 221 transmits the thrust of the extrusion blocks 28 to the first fixing rod 22. The first fixing rod 22 drives the slide cylinder 21 to move axially along the conveying pipe 14. After the extrusion blocks 28 disengage from the ball bearing 221, the spring 24 pushes the slide cylinder 21 back, thereby forming a continuous reciprocating sliding of the slide cylinder 21.

[0032] A discharge cylinder 25 is provided at the bottom of the sliding cylinder 21. The discharge cylinder 25 has a rectangular structure, and screen holes 29 are evenly distributed between the discharge cylinder 25 and the sliding cylinder 21. The screen holes 29 coincide with the discharge port 141. After being conveyed to the discharge port 141 by the conveying pipe 14, the coarse carbon black powder enters the screen holes 29 through the discharge port 141 and then enters the discharge cylinder 25 through the screen holes 29. As the sliding cylinder 21 slides back and forth along the axial direction of the conveying pipe 14 during the discharge process, the coarse carbon black powder is dispersed when passing through the screen holes 29, and the falling state of the coarse carbon black powder after entering the discharge cylinder 25 is more uniform.

[0033] Sliding bolts 210 are evenly arranged on the lower inner wall of the sliding cylinder 21. The sliding bolts 210 are located between two adjacent screen holes 29 and are placed inside the discharge port 141. During the reciprocating sliding of the sliding cylinder 21, the sliding bolts 210 move with the sliding cylinder 21 inside the discharge port 141, and the sliding bolts 210 disturb the coarse carbon black powder at the discharge port 141, making it difficult for the coarse carbon black powder to form a fixed accumulation at the discharge port 141. Two rows of through holes 26 are evenly opened on one side surface of the discharge cylinder 25. The upper and lower rows of through holes 26 are staggered. The through holes 26 provide an installation channel for the magnetic attraction component of the first-stage iron removal mechanism 3 to extend into the discharge cylinder 25, so that the coarse carbon black powder can pass through the subsequent magnetic attraction area when falling inside the discharge cylinder 25. Example

[0034] See Figures 7 to 11 The primary iron removal mechanism 3 has a housing 31, which is fixed to the surface of the discharge cylinder 25 and covers the outer side of the upper and lower rows of through holes 26 of the discharge cylinder 25. The housing 31 is open downwards, and a collection box 33 is detachably installed at the bottom of the housing 31. The collection box 33 is used to collect metal impurities cleaned from the surface of the magnetic attraction component. Sliding holes 32 are evenly distributed on the surface of the housing 31. The sliding holes 32 correspond one-to-one with the through holes 26. The size of the through holes 26 is larger than that of the sliding holes 32. The sliding holes 32 are used to cooperate with the sliding of the magnetic attraction component and to form a blocking position for the attached impurities.

[0035] Cylinders 36 are installed on both sides of the discharge cylinder 25. The two cylinders 36 on the same side are at the same horizontal height and are controlled synchronously. A connecting plate 34 is installed between the output ends of the two cylinders 36 in the same group, and the connecting plate 34 spans the outside of the housing 31. Magnetic rods 35 are evenly arranged on the inner side of the connecting plate 34. The magnetic rods 35 pass through the sliding hole 32 and the through hole 26 and extend into the discharge cylinder 25. The size of the magnetic rods 35 is adapted to the sliding hole 32, so that the magnetic rods 35 can move stably within the sliding hole 32.

[0036] As the coarse carbon black powder falls downwards from the discharge cylinder 25, it passes through the magnetic rods 35 extending into the discharge cylinder 25. Because the through holes 26 are arranged in two staggered rows, the magnetic rods 35 are positioned along the falling path of the coarse carbon black powder. Large pieces of steel wire and iron filings in the coarse carbon black powder are attracted to the surface of the magnetic rods 35 as they pass. The coarse carbon black powder continues to move downwards, and after completing the first magnetic removal of iron, it leaves the discharge cylinder 25 and enters the processing position of the secondary iron removal mechanism 4.

[0037] After the magnetic rod 35 adsorbs metallic impurities, the cylinder 36 drives the connecting plate 34 to move outward from the housing 31. Simultaneously, the connecting plate 34 drives the magnetic rod 35 to move outward along the sliding hole 32 and through hole 26. After the metallic impurities move to the inside of the housing 31 with the magnetic rod 35, the magnetic rod 35 continues to pass through the sliding hole 32. Because the sliding hole 32 is compatible with the size of the magnetic rod 35, it acts as a scraper against the metallic impurities adsorbed on the surface of the magnetic rod 35. The metallic impurities detach from the surface of the magnetic rod 35 and fall downward into the collection box 33. After cleaning, the magnetic rod 35 re-enters the discharge cylinder 25, and the primary iron removal mechanism 3 continues to magnetically remove iron from the subsequently falling coarse carbon black powder.

[0038] The secondary iron removal mechanism 4 is located below the conveying pipe 14. The secondary iron removal mechanism 4 has a base 41, and upright plates 42 are symmetrically installed on the surface of the base 41. A roller 43 is rotatably installed between the two upright plates 42. A reduction motor 44 is fixed to the outside of one of the upright plates 42, and the reduction motor 44 is used to drive the roller 43 to rotate. A magnetic block 46 is fixed between the two upright plates 42, and the magnetic block 46 is eccentrically set inside the roller 43. A discharge plate 45 is inclined between the two upright plates 42 and is used to receive qualified carbon black powder after secondary iron removal.

[0039] The discharge cylinder 25 is located above the drum 43 and biased towards the magnetic block 46. The coarse carbon black powder, after being processed by the primary iron removal mechanism 3, falls onto the surface of the drum 43. When the drum 43 rotates under the drive of the reduction motor 44, the magnetic block 46 forms an eccentric magnetic attraction area inside the drum 43. The fine iron impurities remaining in the coarse carbon black powder are adsorbed onto the surface of the drum 43, while the qualified carbon black powder enters the discharge plate 45 along the falling direction near the surface of the drum 43. As the drum 43 continues to rotate, the fine iron impurities adsorbed on the surface of the drum 43 move to the magnetic attraction area detached from the magnetic block 46 and fall downwards, completing the second magnetic iron removal of the coarse carbon black powder.

[0040] See Figure 11After undergoing multi-stage magnetic separation to remove impurities, the coarse carbon black proceeds to subsequent deep processing steps. The removed coarse carbon black is first subjected to impact and shearing treatment to deagglomerate the carbon black particles. The difference in hardness between carbon black and ash is used to peel away some of the inorganic ash shell from the surface of the carbon black particles, resulting in a particle size control of 100-500 μm after deagglomeration. Next, the deagglomerated carbon black undergoes a grading process. The density difference between carbon black and inorganic ash allows the lighter carbon black particles to proceed to the next process, while the heavier ash is discharged. After deashing, the carbon black ash content is reduced to 6%-10%.

[0041] Subsequently, the graded carbon black undergoes low-temperature activation treatment, with the cooling temperature controlled at 50-80℃. Mechanical force is used to micro-activate the surface of the carbon black particles, increasing the specific surface area to 80-120 m² / g. The activated carbon black then undergoes airflow shaping, where irregular carbon black particles are shaped into round, uniform particles through collision and friction. The particle size D50 after shaping is controlled at 30-80 nm, and D90 ≤ 100 nm. Next, the shaped carbon black is dried using the waste heat from the waste tire pyrolysis system, with the waste heat temperature controlled at 120-150℃, and the moisture content dried to ≤0.8%. Finally, the dried carbon black is vibrated and screened; large particles that do not meet the standards are removed, and qualified products enter the finished product buffer bin, completing the deep processing of recycled carbon black from waste tire pyrolysis.

[0042] The working principle of this invention is as follows: In use, the raw material of waste tire pyrolysis recycled crude carbon black is first added into the storage tank 13. The storage tank 13 is supported above the conveying pipe 14 by the frame 11 and the column 12, so that the raw material of crude carbon black can enter the conveying pipe 14 from the storage tank 13. Then, the conveying screw 16 rotates in the conveying pipe 14. The conveying screw 16 conveys the raw material of crude carbon black that has entered the conveying pipe 14 forward along the extension direction of the conveying pipe 14. The end plate 15 closes the front end of the conveying pipe 14, so that the raw material of crude carbon black is guided to the outlet 141 in the conveying pipe 14 and discharged from the downward-facing outlet 141.

[0043] During the process of the crude carbon black raw material moving towards the discharge port 141, the slide cylinder 21 of the material dispersing mechanism 2 is slidably sleeved on the surface of the conveying pipe 14 and maintains a corresponding position with the discharge port 141; the spring 24 is sleeved on the surface of the second fixed rod 23, the second fixed rod 23 slides through the protrusion 142, and the spring 24 applies a forward thrust to the slide cylinder 21, so that the slide cylinder 21 can maintain a sliding fit with the conveying pipe 14 during use.

[0044] When the conveying screw 16 rotates to convey crude carbon black raw material, the conveying screw 16 synchronously drives the turntable 27 to rotate. During the rotation of the turntable 27, the extrusion inclined block 28 set on the inner side of the turntable 27 contacts the ball 221 at the front end of the first fixed rod 22 in sequence. The extrusion inclined block 28 pushes the first fixed rod 22 through the ball 221. The first fixed rod 22 drives the slide cylinder 21 to slide back and forth along the axial direction of the conveying pipe 14. During the back and forth sliding of the slide cylinder 21, the spring 24, together with the second fixed rod 23 and the protrusion 142, restricts the reset and sliding direction of the slide cylinder 21, so that the slide cylinder 21 can form a continuous reciprocating material dispersing action at the outlet 141 position.

[0045] Subsequently, the coarse carbon black powder in the conveying pipe 14 is discharged downward through the discharge port 141 and enters the discharge cylinder 25 through the sieve holes 29 that coincide with the discharge port 141. Since the sieve holes 29 are located between the discharge cylinder 25 and the sliding cylinder 21, and the sliding cylinder 21 is in a reciprocating sliding state, the coarse carbon black powder is dispersed and falls when passing through the sieve holes 29. At the same time, the sliding bolt 210, which is located below the inner wall of the sliding cylinder 21, is located between two adjacent sieve holes 29 and is placed inside the discharge port 141. When the sliding cylinder 21 reciprocates, it drives the sliding bolt 210 to move synchronously in the discharge port 141, so that the coarse carbon black powder at the discharge port 141 is disturbed, reducing the accumulation and blockage of powder at the discharge port 141, and allowing the coarse carbon black powder to enter the discharge cylinder 25 more evenly.

[0046] Next, the coarse carbon black powder diffuses and falls downwards in the discharge cylinder 25. During the falling process, the magnetic rod 35 of the first-stage iron removal mechanism 3 passes through the sliding hole 32 and the through hole 26 and extends into the discharge cylinder 25. Since the upper and lower rows of through holes 26 on one side surface of the discharge cylinder 25 are staggered, the magnetic rod 35 is also correspondingly distributed on the falling path of the powder. When the coarse carbon black powder passes through the area where the magnetic rod 35 is located, large pieces of steel wire, iron filings and other metal impurities in the powder are attracted by the magnetic rod 35, thus completing the first magnetic iron removal. The shell 31 covers the outside of the through hole 26 and is connected to the discharge cylinder 25. The collection box 33 is installed at the bottom of the shell 31 to cooperate in the subsequent collection of the cleaned metal impurities.

[0047] After the primary iron removal mechanism 3 has been in use for a period of time, when it is necessary to clean the metal impurities adsorbed on the surface of the magnetic rod 35, the cylinder 36 drives the connecting plate 34 to move outward of the housing 31. The connecting plate 34 simultaneously drives the magnetic rod 35 to move outward along the sliding hole 32 and the through hole 26. Since the size of the through hole 26 is larger than that of the sliding hole 32, when the magnetic rod 35 moves outward, the metal impurities adsorbed on the surface of the magnetic rod 35 can first enter the inner side of the housing 31 with the magnetic rod 35. Then, when the magnetic rod 35 continues to move outward and passes through the sliding hole 32, the metal impurities are blocked by the sliding hole 32 and fall off the surface of the magnetic rod 35. The fallen metal impurities fall downward into the collection box 33, thereby completing the cleaning of the magnetic rod 35, which facilitates the primary iron removal mechanism 3 to continuously remove iron from the subsequent coarse carbon black powder using magnetic attraction.

[0048] After being processed by the primary iron removal mechanism 3, the coarse carbon black powder continues to fall to the secondary iron removal mechanism 4. The base 41 of the secondary iron removal mechanism 4 supports the upright plate 42, and the roller 43 is rotatably installed between the two upright plates 42. The geared motor 44 drives the roller 43 to rotate. Since the discharge cylinder 25 is located above the roller 43 and biased towards one side of the magnetic block 46, when the coarse carbon black powder after primary iron removal falls onto the surface of the roller 43, the magnetic block 46 forms an eccentric magnetic attraction area on the inner side of the roller 43. The fine iron impurities remaining in the coarse carbon black powder are adsorbed onto the surface of the roller 43, and the qualified carbon black powder enters the inclined discharge plate 45 with the falling direction.

[0049] During the continuous rotation of the drum 43, the fine iron impurities adsorbed on the surface of the drum 43 by the magnetic blocks 46 rotate with the drum 43 and leave the effective range of the magnetic blocks 46. When the fine iron impurities move to the area where they are detached from the magnetic attraction of the magnetic blocks 46, they lose their attraction and fall off the surface of the drum 43, thus separating from the qualified carbon black powder entering the discharge plate 45. As a result, the coarse carbon black powder passes through the primary iron removal mechanism 3 and the secondary iron removal mechanism 4 in sequence, first removing larger steel wires and iron filings, and then removing the fine iron impurities attached to the surface of the carbon black particles, so that the iron content of the finished product is reduced to the range defined in the claims.

[0050] After multi-stage magnetic separation for impurity removal, the crude carbon black continues to undergo further processing using deep processing methods. Subsequently, the crude carbon black is subjected to impact and shearing treatment to deagglomerate the agglomerated carbon black particles. The inorganic ash shell on the surface of some carbon black particles is peeled off by utilizing the hardness difference between carbon black and ash, so that the particle size of the deagglomerated particles is controlled at 100-500μm. Next, the deagglomerated carbon black is graded by utilizing the density difference between carbon black and inorganic ash, so that the light carbon black particles enter the next process and the heavy ash is discharged, thereby achieving physical deashing and reducing the ash content of the deashed carbon black to 6%-10%.

[0051] Subsequently, the graded carbon black undergoes low-temperature activation treatment, with the cooling temperature controlled at 50-80℃. Mechanical force is used to micro-activate the surface of the carbon black particles, increasing their surface roughness and specific surface area, raising the specific surface area to 80-120 m² / g. Next, the activated carbon black undergoes airflow shaping, causing irregular carbon black particles to collide and rub against each other, forming round, uniform particles. The particle size D50 is controlled at 30-80 nm, and D90 ≤ 100 nm. Then, the shaped carbon black is dried using the waste heat from the waste tire pyrolysis system, with the waste heat temperature controlled at 120-150℃, until the moisture content is ≤ 0.8%. Finally, the dried carbon black is sieved to remove large, substandard particles, and the qualified product is placed in the finished product buffer bin, completing a full deep processing step for the recycling of carbon black from waste tire pyrolysis.

[0052] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A deep processing system for recycling and utilizing carbon black from waste tire pyrolysis, characterized in that: The system includes a carbon black powder conveying mechanism (1) for storing and conveying carbon black raw materials to be processed. A dispensing mechanism (2) is provided at the discharge position of the carbon black powder conveying mechanism (1). The dispensing mechanism (2) is used to receive the carbon black powder sent out by the carbon black powder conveying mechanism (1) and to make the carbon black powder form a diffuse state before falling. A primary iron removal mechanism (3) is provided on the feeding path of the dispensing mechanism (2). The primary iron removal mechanism (3) is used to perform the first magnetic attraction removal of metal impurities during the diffusion and falling of the carbon black powder. A secondary iron removal mechanism (4) is provided below the primary iron removal mechanism (3). The secondary iron removal mechanism (4) is used to perform the second magnetic attraction removal of the carbon black powder after the first iron removal. The carbon black powder passes through the carbon black powder conveying mechanism (1), the dispensing mechanism (2), the primary iron removal mechanism (3) and the secondary iron removal mechanism (4) in sequence to remove metal impurities in the recycled carbon black from waste tire pyrolysis through diffusion feeding and multi-stage magnetic attraction.

2. The deep processing system for recycling and utilizing waste tire pyrolysis carbon black according to claim 1, characterized in that: The carbon black powder conveying mechanism (1) is provided with a frame (11) fixed to the ground. Columns (12) are vertically fixed on both sides of the top of the frame (11). A storage bin (13) for storing carbon black raw materials to be processed is fixed between the tops of the two columns (12). A conveying pipe (14) is horizontally fixed to the bottom of the storage bin (13). The conveying pipe (14) is suspended and extends forward. An end plate (15) is fixed to the front end of the conveying pipe (14). ) is used to seal the front end of the conveying pipe (14); the conveying pipe (14) is rotatably installed with a conveying screw (16), which is used to convey the carbon black raw material in the storage bucket (13) forward along the conveying pipe (14) by rotation; the bottom of the conveying pipe (14) is provided with a discharge port (141) which opens downward; the surface of the conveying pipe (14) is symmetrically provided with protrusions (142) near the root.

3. The deep processing system for recycling and utilizing waste tire pyrolysis carbon black according to claim 2, characterized in that: The bulk material mechanism (2) is provided with a slide cylinder (21) that is slidably sleeved on the surface of the conveying pipe (14). The slide cylinder (21) is positioned opposite to the outlet (141). The rear end of the slide cylinder (21) is symmetrically provided with a second fixing rod (23). The two second fixing rods (23) slide through the corresponding protrusions (142) respectively. The surface of the second fixing rod (23) is sleeved with a spring (24). The spring (24) is located between the slide cylinder (21) and the protrusions (142) and is used to apply a forward thrust to the slide cylinder (21).

4. The deep processing system for recycling and utilizing waste tire pyrolysis carbon black according to claim 3, characterized in that: The front end of the slide cylinder (21) is symmetrically provided with a first fixing rod (22), the front end of the first fixing rod (22) extends beyond the front end face of the end plate (15), and the front end of the first fixing rod (22) is provided with a rolling ball (221); the front end of the conveying screw (16) is equipped with a turntable (27), the turntable (27) is located outside the front end of the slide cylinder (21); the inner side of the turntable (27) is uniformly provided with extrusion slant blocks (28) with the axis of the turntable (27) as the center, and the ball (221) corresponds to the extrusion slant block (28); when the conveying screw (16) drives the turntable (27) to rotate, the extrusion slant block (28) pushes the first fixing rod (22) through the ball (221), so that the slide cylinder (21) slides back and forth along the axial direction of the conveying pipe (14).

5. The deep processing system for recycling and utilizing waste tire pyrolysis carbon black according to claim 3, characterized in that: The bottom of the slide cylinder (21) is provided with a discharge cylinder (25), which has a rectangular structure. Screen holes (29) are evenly opened between the discharge cylinder (25) and the slide cylinder (21). The screen holes (29) coincide with the discharge port (141) so that the carbon black powder in the conveying pipe (14) enters the discharge cylinder (25) through the discharge port (141) and the screen holes (29). Sliding bolts (210) are evenly arranged on the lower part of the inner wall of the slide cylinder (21). The sliding bolts (210) are located between two adjacent screen holes (29) and placed inside the discharge port (141). Two rows of through holes (26) are evenly opened on one side surface of the discharge cylinder (25). The upper and lower rows of through holes (26) are staggered.

6. The deep processing system for recycling and utilizing waste tire pyrolysis carbon black according to claim 5, characterized in that: The primary iron removal mechanism (3) is provided with a housing (31) fixed on the surface of the discharge cylinder (25). The housing (31) covers the outside of the upper and lower rows of through holes (26) and the housing (31) is open downward. A collection box (33) is detachably installed at the bottom of the housing (31). Sliding holes (32) are evenly opened on the surface of the housing (31). The sliding holes (32) correspond one-to-one with the through holes (26), and the size of the through holes (26) is larger than that of the sliding holes (32).

7. The deep processing system for recycling and utilizing waste tire pyrolysis carbon black according to claim 6, characterized in that: Cylinders (36) are installed on both sides of the discharge cylinder (25). The two cylinders (36) on the same side are at the same horizontal height and are controlled synchronously. A connecting plate (34) is installed between the output ends of the two cylinders (36) in the same group. The connecting plate (34) spans across the outside of the housing (31). Magnetic rods (35) are evenly arranged on the inner side of the connecting plate (34). The magnetic rods (35) pass through the sliding hole (32) and the through hole (26) and extend into the discharge cylinder (25). The size of the magnetic rods (35) is adapted to the sliding hole (32). The cylinder (36) is used to drive the connecting plate (34) and the magnetic rods (35) to move to the outside of the housing (31), so that the metal impurities adsorbed on the surface of the magnetic rods (35) are blocked and fall into the collection box (33) when passing through the sliding hole (32).

8. The deep processing system for recycling and utilizing waste tire pyrolysis carbon black according to claim 5, characterized in that: The secondary iron removal mechanism (4) is located below the conveying pipe (14). The secondary iron removal mechanism (4) is provided with a base (41). Vertical plates (42) are symmetrically installed on the surface of the base (41). A roller (43) is rotatably installed between the two vertical plates (42). A reduction motor (44) is fixed on the outside of one of the vertical plates (42). The reduction motor (44) is used to control the rotation of the roller (43). A magnetic block (46) is fixed between the two vertical plates (42). The magnetic block (46) is eccentrically located inside the roller (43). A discharge plate (45) is inclined between the two vertical plates (42). The discharge cylinder (25) is located above the roller (43) and biased towards one side of the magnetic block (46), so that the carbon black powder processed by the primary iron removal mechanism (3) falls onto the surface of the roller (43) and is subjected to secondary magnetic iron removal through the cooperation of the roller (43) and the magnetic block (46).

9. A deep processing method for recycling and utilizing carbon black from waste tire pyrolysis, characterized in that: The deep processing system for recycling and utilizing waste tire pyrolysis carbon black according to any one of claims 1 to 8 includes the following steps: S1. Place the crude carbon black raw material inside the carbon black powder conveying mechanism (1) and achieve automatic feeding through the carbon black powder conveying mechanism (1); S2. Perform multi-stage magnetic separation to remove impurities, so that the carbon black powder first passes through the first-stage iron removal mechanism (3) to remove large pieces of steel wire and iron filings, and then passes through the second-stage iron removal mechanism (4) to remove the fine iron impurities attached to the surface of the carbon black particles, so that the iron content of the finished product is ≤0.3%; S3. The impurity-removed coarse carbon black is fed into a special horizontal impact mill. Under a closed negative pressure environment, the agglomerated carbon black is impacted and sheared by a high-speed rotating impact rotor to deagglomerate the agglomerated particles. The inorganic ash shell on the surface of some carbon black particles is peeled off by the hardness difference between carbon black and ash. After deagglomeration, the particle size is controlled at 100-500μm. S4. The deagglomerated carbon black enters a multi-stage vortex classifier. Utilizing the density difference between carbon black and inorganic ash, the airflow speed is adjusted to allow the light carbon black particles to rise with the airflow and enter the next process, while the heavy ash settles under gravity and is discharged from the bottom of the classifier, achieving physical deashing. After deashing, the carbon black ash content is reduced to 6%-10%. S5. The graded carbon black is fed into a special low-temperature activation mill. The mill chamber is equipped with a jacket for cooling, and the cooling temperature is controlled at 50-80℃. The surface of the carbon black particles is micro-activated by the mechanical force of high-energy ball milling, which increases the surface roughness and specific surface area, and increases the specific surface area to 80-120m² / g. S6. The activated carbon black is fed into a supersonic airflow shaping machine. The supersonic airflow is used to collide and rub the carbon black particles, shaping the irregular carbon black particles into round and uniform particles. After shaping, the particle size D50 is controlled at 30-80nm and D90≤100nm. S7. Utilizing the waste heat from the waste tire pyrolysis system, the shaped carbon black is fed into a waste heat dryer at a waste heat temperature of 120-150℃ and dried until the moisture content is ≤0.8%. S8. After drying, the carbon black is screened through a precision vibrating screen to remove large particles that do not meet the standards, so that the qualified products after screening can enter the finished product buffer silo.

10. A deep processing method for recycling and utilizing waste tire pyrolysis carbon black according to claim 9, characterized in that: In step S2, after the crude carbon black raw material enters the conveying pipe (14) from the storage tank (13), it is conveyed forward by the conveying screw (16); the conveying screw (16) drives the turntable (27) to rotate synchronously, and the extrusion slant block (28) on the turntable (27) pushes the slide cylinder (21) to slide back and forth along the conveying pipe (14) axially through the ball (221), so that the carbon black powder diffuses and falls through the outlet (141) and the sieve hole (29); during the fall of the carbon black powder, it passes through the magnetic rod (35) of the first-stage iron removal mechanism (3) and completes the first iron removal, and then falls onto the drum (43) of the second-stage iron removal mechanism (4); under the action of the magnetic block (46), the metal impurities are adsorbed onto the surface of the drum (43), and the qualified carbon black powder falls into the discharge plate (45). The metal impurities adsorbed on the surface of the drum (43) fall downward after the drum (43) rotates out of the range of the magnetic block (46).

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