Non-contact multi-burner heat-supply carbon black drying device and method of using same

Abstract

The application relates to the technical field of drying devices, and discloses a non-contact multi-burner heat-supply carbon black drying device and a use method thereof, which comprises a drying sleeve, the outer surface of the drying sleeve is wrapped with a microwave sleeve, a plurality of magnetrons are equidistantly arranged in the microwave sleeve and distributed in a ring shape on the outer surface of the drying sleeve, a detachable drying roller is rotatably sleeved in the drying sleeve, and a guide spiral plate is fixedly sleeved on the outer surface of the drying roller. The magnetrons arranged in a ring shape outside the drying sleeve generate microwaves, heat is generated through the molecular vibration and interaction of the materials by utilizing the high-frequency electromagnetic wave characteristics of the microwaves, carbon black is dried, the carbon black is heated to high temperature in a short time, the internal moisture of the carbon black is rapidly evaporated, the drying efficiency is improved, the materials are prevented from directly contacting the heat source, the energy loss in the heat transfer process is reduced, and the thermal aging and pollution of the materials are avoided.

Description

Technical Field

[0001] This invention relates to the field of drying equipment technology, specifically a non-contact multi-burner heated carbon black drying device and its usage method. Background Technology

[0002] In the production process of wet granulation of carbon black using the oil furnace method, the drying process is a crucial step, as the drying effect directly affects the product quality and production efficiency. Traditional drying technologies, such as hot air drying and steam drying, mainly rely on the principle of hot air drying to transfer heat through contact between hot air and wet carbon black, thereby evaporating moisture and drying the carbon black. Although this drying method is mature, it has a series of problems. Traditional carbon black drying equipment typically consists of hot air pipelines, drying cylinders, fans, dehumidification systems, and control systems. The hot air comes from carbon black exhaust gas, the drying cylinder contains the wet carbon black, and the hot air transfers heat to the carbon black through the lifters inside the cylinder. At the same time, the moisture is discharged through the dehumidification system, and the control system is used to adjust parameters such as hot air temperature, air volume, and drying time. Although it is widely used, it suffers from problems such as high energy consumption, uneven drying, and environmental pollution, and urgently needs improvement.

[0003] The main problems with traditional carbon black drying equipment include: uneven drying; uneven distribution of hot air within the drying drum due to differences in carbon black particle size and density, resulting in insufficient drying of some carbon black; prolonged contact time between carbon black and hot air, leading to thermal aging and reducing the specific surface area and structural properties of the carbon black; low thermal efficiency, typically only around 50%, with a large amount of heat being released into the environment through the dehumidification system, resulting in energy waste; severe smoke and noise pollution from fuel combustion, failing to meet modern environmental protection requirements; relatively simple control systems, making it difficult to precisely adjust drying parameters, affecting drying effect and production efficiency; limited drying capacity, making it difficult to meet the needs of large-scale production; and large, cumbersome equipment, making installation and maintenance difficult and increasing production costs. Summary of the Invention

[0004] To address the problems of uneven heating, easy thermal aging, and poor environmental performance of existing carbon black drying devices, this invention provides a non-contact multi-burner heating carbon black drying device and its usage method to solve the above problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A non-contact multi-burner heated carbon black drying device and its usage method are disclosed, comprising a drying sleeve, a microwave sleeve covering the outer surface of the drying sleeve, a plurality of magnetrons evenly distributed in a ring on the outer surface of the drying sleeve inside the microwave sleeve, a detachable drying drum rotatably sleeved inside the drying sleeve, a guide spiral plate fixedly sleeved on the outer surface of the drying drum, a feed inlet fixedly through the top of the drying sleeve on one side of the microwave sleeve, a discharge inlet fixedly through the bottom of the drying sleeve on the other side of the microwave sleeve, a hot air assembly disposed on the side of the drying sleeve near the feed inlet, an exhaust pipe fixedly through the end of the drying drum near the discharge inlet, and a heat recovery assembly disposed on the exhaust pipe.

[0007] Furthermore, limiting plates are fixed on the outer surfaces of the drying drums at both ends of the guide spiral plate, and fixed sleeves are slidably attached to the outer sides of the limiting plates. The two fixed sleeves are rotatably fitted onto the outer surfaces of the drying drums, and the two fixed sleeves are fixed to the drying sleeves by bolts.

[0008] Furthermore, the drying rollers inside the two limiting plates are high-density breathable meshes with several support rods, the edge of the guide spiral plate away from the drying roller end slides against the inner wall of the drying sleeve, and several support bases are fixed at equal intervals on the bottom surface of the microwave sleeve to support the microwave sleeve.

[0009] Furthermore, a sealing ring plate is fixed to the outer side of each of the two limiting plates, and a sealing groove that mates with the sealing ring plate is opened on the inner side of each of the two fixing sleeves. The outer side of each of the two limiting plates is flush with the end face of the drying sleeve.

[0010] Furthermore, a rotating tube is fixedly connected to the drying drum near the feed pipe inlet. A gear one is fixed to the outer surface of the rotating tube, and a gear two is meshed with one side of the gear. The gear two is rotatably connected to the inside of the support bracket via a bearing. A servo motor is installed on the support bracket on the side of the gear two. A connecting shaft is fixed to the output end of the servo motor. The other end of the connecting shaft rotatably passes through the support bracket and is fixed to the gear two. The diameter of the gear two is smaller than the diameter of the gear one. The diameters of the gear one and the rotating tube are both smaller than the outer diameter of the support base.

[0011] Furthermore, the hot air assembly includes a heating tube and a fan. The end of the rotating tube away from the drying sleeve is fixed with a connecting ring plate by bolts. The side of the connecting ring plate away from the drying sleeve is rotatably connected to a heating air duct by a bearing. The bottom of the heating air duct is fixed to the top surface of the support bracket. A fan is rotatably installed inside the heating air duct. A support tube is fixed inside the fan and the heating air duct of the same diameter as the rotating tube. Several heating tubes are equidistantly installed on the support tube.

[0012] Furthermore, a rotating cylinder is rotatably connected to the heating air duct away from the drying sleeve via a bearing. A connecting frame is fixed inside the rotating cylinder, and the side end of the connecting frame is fixedly connected to the fan shaft. Pulleys are fixedly sleeved on the outer surfaces of both the rotating cylinder and the connecting shaft, and the two pulleys are connected by a high-temperature resistant belt drive.

[0013] Furthermore, each of the heating tubes is configured in a vortex shape, with the heating tubes away from the fan end extending into the interior of the rotating tube, and a filter screen plate is fixed to the side of the rotating tube away from the heating air tube by bolts.

[0014] Furthermore, the heat recovery assembly includes a heat recovery pipe, a water inlet, and a water outlet. The heat recovery pipe is fixedly sleeved on the outer surface of the exhaust pipe. A water storage chamber is opened inside the heat recovery pipe. Another support frame is fixed on the bottom surface of the heat recovery pipe. The water inlet is fixedly connected through the top surface of the heat recovery pipe away from the drying sleeve end. The water outlet is fixedly connected through the end of the heat recovery pipe near the drying sleeve end.

[0015] Furthermore, a method of using a non-contact multi-burner heated carbon black drying device includes the following steps:

[0016] Step A: Drying the carbon black;

[0017] Step A1: Connect the feed inlet to the wet carbon black outlet through a pipe, and fix the feed inlet to the pipe with bolts. Then fix the discharge pipe to the outlet through a flange.

[0018] Step A2: The wet carbon black is discharged into the drying sleeve through the feed pipe. At this time, the servo motor runs and drives the connecting shaft to rotate. When the connecting shaft rotates, it drives the second gear to rotate. The second gear drives the first gear it meshes with to rotate, which in turn drives the rotating tube to rotate. When the rotating tube rotates, it drives the drying drum to rotate. When the drying drum rotates, it drives the guide spiral plate to rotate. When the guide spiral plate rotates, it drives the wet carbon black to move into the drying sleeve.

[0019] Step A3: Open the microwave sleeve. The magnetron inside the microwave sleeve generates microwaves. Under the action of the high-frequency electromagnetic waves of the microwaves, the molecules inside the material vibrate and interact to generate heat, heating the carbon black to a high temperature in a short time, thus achieving carbon black drying.

[0020] Step B: Simultaneous hot air drying;

[0021] Step B1: When the servo motor drives the connecting shaft to rotate, it synchronously drives the pulley to rotate. The pulley drives the pulley on the rotating drum to rotate through the high-temperature resistant belt, thereby driving the rotating drum to rotate. When the rotating drum rotates, it drives the connecting frame to rotate. The connecting frame drives the fan to rotate. When the fan rotates, it draws in external airflow and discharges it into the heating air duct.

[0022] Step B2: When the microwave sleeve is running, the heating tube is turned on simultaneously. The airflow is filtered through the filter screen before entering the heating tube. After the airflow enters the heating tube, the heating tube heats and dries the airflow as it passes through the heating tube. The dried high-temperature airflow then enters the drying drum.

[0023] Step B3: After the high-temperature airflow enters the drying drum, the moisture in the carbon black distributed on the outer surface of the drying drum and the steam after the carbon black is heated by microwave are discharged into the exhaust pipe due to the air permeability of the drying drum, and the carbon black is further heated.

[0024] Step C: High-temperature hot gas preheating and recovery;

[0025] Step C1: Connect the water pipe connected to the water pump to the inlet pipe through the flange. Connect the water pump inlet to the cold water tank. Then connect the water pipe connected to the hot water tank to the outlet pipe through the flange. A one-way valve is installed on the water pipe.

[0026] Step C2: When the microwave sleeve is running, the water pump runs synchronously, drawing cold water into the heat recovery pipe so that the heat recovery pipe is filled with cold water. After the high-temperature hot air enters the exhaust pipe, it exchanges heat with the cold water inside the heat recovery pipe. The one-way valve is opened, and the hot water after heat exchange is discharged into the hot water tank.

[0027] Step D: Equipment maintenance;

[0028] Step D1: After each drying cycle, shut down the equipment, loosen the nut to release the filter screen from the rotating cylinder, remove the filter screen for cleaning, and after cleaning and drying, fix it back onto the rotating cylinder with nuts and bolts.

[0029] Step D2: When cleaning the drying drum, loosen the nuts on the fixed sleeve plate at the exhaust pipe end and the nuts connecting the rotating tube and the connecting ring plate to disengage the fixed sleeve plate from the drying sleeve and the rotating tube from the connecting ring plate. Pull the exhaust pipe to pull the drying drum and the guide spiral plate out of the drying sleeve to clean the drying drum. After cleaning, insert the drying drum and the guide spiral plate into the drying sleeve so that the rotating tube and the gear 2 are aligned and engaged. Then fix the fixed sleeve plate to the drying sleeve and the rotating tube to the connecting ring plate.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] 1. In this invention, microwaves are generated by a magnetron annularly sleeved on the outside of the drying sleeve. The high-frequency electromagnetic wave characteristics of microwaves generate heat through molecular vibration and interaction within the material, thereby achieving carbon black drying. The carbon black is heated to a high temperature in a short time, causing the internal moisture of the carbon black to evaporate rapidly, thus improving drying efficiency. This invention solves the problems of uneven heating, easy thermal aging, and poor environmental performance of existing carbon black drying devices. It avoids direct contact between the material and the heat source, reduces energy loss during heat transfer, and thus avoids thermal aging and pollution of the material.

[0032] 2. In this invention, the rotatable drying drum and guide spiral plate can evenly distribute the carbon black inside the drying sleeve during drying, further ensuring the uniformity of drying. When the guide spiral plate rotates, it carries the carbon black from the feed port to the discharge port, thereby facilitating the normal loading and unloading of carbon black and improving the practicality of the drying device.

[0033] 3. While microwave drying is in progress, hot air from the feed end is used as another non-contact heat source to heat the carbon black. At the same time, the airflow inside the drying drum is increased. Combined with the breathable design of the drying drum, the internal moisture of the carbon black can be quickly removed. The non-contact drying technology avoids the direct contact between the carbon black and the heating element in traditional contact drying, thereby reducing carbon black contamination and heat loss and improving the drying effect. At the same time, the filter screen at the air inlet prevents impurities from being brought in when the airflow enters.

[0034] 4. When the high-temperature hot air discharged after drying passes through the heat recovery pipe, the enveloping flowing water inside the heat recovery pipe can recover the heat from the high-temperature hot air, which improves the environmental performance of the drying device. In addition, heating can remove the moisture from the airflow to be entered into the drying drum, further improving the drying effect of the drying device. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the complete structure of a drying apparatus according to an embodiment of this application;

[0037] Figure 2 yes Figure 1 A schematic diagram of the complete structure of the drying device in the illustrated embodiment from the rear side.

[0038] Figure 3 yes Figure 1A bottom view of the complete structure of the drying device in the illustrated embodiment;

[0039] Figure 4 yes Figure 1 A schematic diagram of the internal structure of the drying device in the illustrated embodiment;

[0040] Figure 5 yes Figure 1 A partial structural diagram of the drying device in the illustrated embodiment;

[0041] Figure 6 yes Figure 1 Another perspective view of the partial structure of the drying device in the illustrated embodiment.

[0042] The meanings of the reference numerals in the diagram are as follows: 1. Drying sleeve; 2. Microwave sleeve; 3. Support base frame; 4. Drying drum; 5. Guide spiral plate; 6. Feed inlet; 7. Discharge inlet; 8. Limiting plate; 9. Fixing sleeve plate; 10. Sealing ring plate; 11. Sealing groove; 12. Exhaust pipe; 13. Gear 1; 14. Gear 2; 15. Connecting shaft; 16. Connecting ring plate; 17. Heating air duct; 18. Support pipe; 19. Heating tube; 20. Fan; 21. Rotating cylinder; 22. Connecting frame; 23. Filter screen plate; 24. Pulley; 25. High temperature resistant belt; 26. Heat recovery pipe; 27. Water inlet; 28. Water outlet; 29. ​​Support bracket; 30. Rotating tube; 31. Servo motor. Detailed Implementation

[0043] To make the purpose, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] Reference Figure 1 , Figure 2 and Figure 4A non-contact multi-burner heated carbon black drying device and its usage method are disclosed. The device includes a drying sleeve 1, with a microwave sleeve 2 covering its outer surface. Several annular magnetrons are equidistantly arranged on the outer surface of the drying sleeve 1 inside the microwave sleeve 2. A detachable drying drum 4 is rotatably fitted inside the drying sleeve 1. A rotating tube 30 is fixedly connected to the drying drum 4 near the feed inlet 6. A gear 13 is fixed to the outer surface of the rotating tube 30. A gear 2 14 is meshed with the side of the gear 13. The gear 2 14 is rotatably connected to the support bracket 29 via a bearing. A servo motor 31 is mounted on the support bracket 29 on the side of the gear 2 14. The output end of the servo motor 31 is fixed... A connecting shaft 15 is fixed, and the other end of the connecting shaft 15 rotates through the support bracket 29 and is fixed on the gear 2 14. The diameter of the gear 2 14 is smaller than the diameter of the gear 1 13. The diameters of the gear 1 13 and the rotating tube 30 are both smaller than the outer ring diameter of the support base 3. A guide spiral plate 5 is fixedly sleeved on the outer surface of the drying drum 4. A feed inlet 6 is fixedly inserted through the top of the drying sleeve 1 on one side of the microwave sleeve 2. A discharge outlet 7 is fixedly inserted through the bottom of the drying sleeve 1 on the other side of the microwave sleeve 2. A hot air assembly is provided on the side of the drying sleeve 1 near the feed inlet 6. An exhaust pipe 12 is fixedly inserted through the end of the drying drum 4 near the discharge outlet 7. A heat recovery assembly is provided on the exhaust pipe 12.

[0045] Specifically, limit plates 8 are fixed to the outer surfaces of the drying rollers 4 at both ends of the guide spiral plate 5. Fixed sleeves 9 are slidably fitted to the outer sides of the limit plates 8. The two fixed sleeves 9 are fitted and rotated on the outer surfaces of the drying rollers 4. The two fixed sleeves 9 are fixed to the drying sleeve 1 by bolts. Sealing ring plates 10 are fixed to the outer sides of the two limit plates 8. Sealing grooves 11 that cooperate with sealing ring plates 10 are opened on the inner sides of the two fixed sleeves 9. The outer sides of the two limit plates 8 are flush with the end face of the drying sleeve 1. The drying rollers 4 inside the two limit plates 8 are high-density breathable mesh with several support rods. The edge of the guide spiral plate 5 away from the drying roller 4 is slidably fitted to the inner wall of the drying sleeve 1. Several support bases 3 are fixed at equal intervals on the bottom surface of the microwave sleeve 2 to support the microwave sleeve 2.

[0046] As an optimization solution, such as Figure 5 and Figure 6As shown, the hot air assembly includes a heating tube 19 and a fan 20. A connecting ring plate 16 is bolted to the end of the rotating tube 30 away from the drying sleeve 1. A heating air duct 17 is rotatably connected to the side of the connecting ring plate 16 away from the drying sleeve 1 via a bearing. The bottom of the heating air duct 17 is fixed to the top surface of the support bracket 29. The fan 20 is rotatably installed inside the heating air duct 17. A support tube 18 is fixed inside the heating air duct 17, which is the diameter of the fan 20 and the rotating tube 30. Several heating tubes 19 are equidistantly installed on the support tube 18. Each heating tube 19 is set in a vortex shape. The heating tube 19 away from the fan 20 extends into the interior of the rotating tube 30. A filter screen plate 23 is bolted to the side of the rotating tube 21 away from the heating air duct 17.

[0047] Specifically, a rotating cylinder 21 is rotatably connected to the side of the heating air duct 17 away from the drying sleeve 1 via a bearing. A connecting frame 22 is fixed inside the rotating cylinder 21. The side end of the connecting frame 22 is fixedly connected to the rotating shaft of the fan 20. Pulleys 24 are fixedly sleeved on the outer surfaces of both the rotating cylinder 21 and the connecting shaft 15. The two pulleys 24 are connected by a high-temperature resistant belt 25.

[0048] As an optimization solution, such as Figure 1 and Figure 3 As shown, the heat recovery assembly includes a heat recovery pipe 26, a water inlet 27, and a water outlet 28. The heat recovery pipe 26 is fixedly sleeved on the outer surface of the exhaust pipe 12. A water storage chamber is opened inside the heat recovery pipe 26. Another support base 3 is fixed on the bottom surface of the heat recovery pipe 26. The water inlet 27 is fixedly connected through the top surface of the heat recovery pipe 26 away from the drying sleeve 1, and the water outlet 28 is fixedly connected through the end of the heat recovery pipe 26 near the drying sleeve 1.

[0049] Working principle: During carbon black drying, the feed port 6 is connected to the wet carbon black discharge port through a pipeline, and the feed port 6 is fixed to the pipeline with bolts. Then, the discharge pipe is fixed to the discharge port 7 through a flange. The wet carbon black is discharged into the drying sleeve 1 through the feed port 6. At this time, the servo motor 31 runs and drives the connecting shaft 15 to rotate. When the connecting shaft 15 rotates, it drives the gear 14 to rotate. The gear 14 drives the meshing gear 13 to rotate, which in turn drives the rotating tube 30 to rotate. When the rotating tube 30 rotates, it drives the drying drum 4 to rotate. When the drying drum 4 rotates, it drives the guide spiral plate 5 to rotate. When the guide spiral plate 5 rotates, it drives the wet carbon black to move into the drying sleeve 1. The microwave sleeve 2 is opened. The magnetron inside the microwave sleeve 2 generates microwaves. Under the action of the high-frequency electromagnetic waves of the microwaves, the molecules inside the material vibrate and interact to generate heat, heating the carbon black to a high temperature in a short time, thus achieving carbon black drying.

[0050] Synchronous hot air drying: When the servo motor 31 drives the connecting shaft 15 to rotate, it synchronously drives the pulley 24 to rotate. The pulley 24 drives the pulley 24 on the rotating drum 21 to rotate through the high-temperature resistant belt 25, thereby driving the rotating drum 21 to rotate. When the rotating drum 21 rotates, it drives the connecting frame 22 to rotate. The connecting frame 22 drives the fan 20 to rotate. When the fan 20 rotates, it draws in external airflow and discharges it into the heating air duct 17. When the microwave sleeve 2 is running, the heating tube 19 is opened synchronously. Before the airflow enters the heating air duct 17, it is filtered by the filter screen 23. After the airflow enters the heating air duct 17, it passes through the heating tube 19, which heats and dries the airflow. The dried high-temperature airflow enters the drying drum 4. After the high-temperature airflow enters the drying drum 4, under the air permeability of the drying drum 4, the moisture in the carbon black distributed on the outer surface of the drying drum 4 and the steam after the carbon black is heated by microwave are discharged into the exhaust pipe 12, and the carbon black is further heated.

[0051] High-temperature hot air preheating and recovery: A water pipe connected to a water pump is fixed to the inlet pipe 27 via a flange. The water pump inlet is connected to a cold water tank. A water pipe connected to a hot water tank is fixed to the outlet pipe 28 via a flange. A one-way valve is installed on the water pipe. When the microwave sleeve 2 is running, the water pump runs synchronously, drawing cold water into the heat recovery pipe 26, filling the heat recovery pipe 26 with cold water. After the high-temperature hot air enters the exhaust pipe 12, it exchanges heat with the cold water inside the heat recovery pipe 26. The one-way valve is opened, and the heat-exchanged hot water is discharged into the hot water tank.

[0052] For equipment maintenance, after each drying cycle, shut down the equipment and loosen the nuts to release the filter screen 23 from the rotating cylinder 21. Remove the filter screen 23 for cleaning. After cleaning and drying, fix it back onto the rotating cylinder 21 with nuts and bolts. When cleaning the drying drum 4, loosen the nuts on the fixing sleeve 9 at the end of the exhaust pipe 12 and the nuts connecting the rotating pipe 30 and the connecting ring plate 16 to release the fixing sleeve 9 from the drying sleeve 1 and the rotating pipe 30 from the connecting ring plate 16. Pull the exhaust pipe 12 to pull the drying drum 4 and the guide spiral plate 5 out of the drying sleeve 1 for cleaning. After cleaning, insert the drying drum 4 and the guide spiral plate 5 into the drying sleeve 1 so that the rotating pipe 30 aligns and meshes with the gear 14. Then fix the fixing sleeve 9 to the drying sleeve 1 and the rotating pipe 30 to the connecting ring plate 16.

[0053] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalent elements of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0054] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A non-contact multi-burner heated carbon black drying device, characterized in that: The device includes a drying sleeve, on the outer surface of which is covered by a microwave sleeve. Inside the microwave sleeve, several magnetrons are equidistantly arranged in a ring on the outer surface of the drying sleeve. Inside the drying sleeve, a detachable drying drum is rotatably sleeved. A guide spiral plate is fixedly sleeved on the outer surface of the drying drum. A feed inlet is fixedly through the top of the drying sleeve on one side of the microwave sleeve, and a discharge inlet is fixedly through the bottom of the drying sleeve on the other side of the microwave sleeve. A hot air assembly is provided on the side of the drying sleeve near the feed inlet, and an exhaust pipe is fixedly through the end of the drying drum near the discharge inlet. A rotating tube is fixedly connected to the drying drum near the feed pipe inlet. A gear one is fixed to the outer surface of the rotating tube. A gear two is meshed with one side of the gear. The gear two is rotatably connected to the inside of the support bracket via a bearing. A servo motor is installed on the support bracket on the side of the gear two. A connecting shaft is fixed to the output end of the servo motor. The other end of the connecting shaft rotatably passes through the support bracket and is fixed to the gear two. The diameter of the gear two is smaller than the diameter of the gear one. The diameters of the gear one and the rotating tube are both smaller than the outer diameter of the support base. The hot air assembly includes a heating tube and a fan. The end of the rotating tube away from the drying sleeve is fixed with a connecting ring plate by bolts. The side of the connecting ring plate away from the drying sleeve is rotatably connected to a heating air duct by a bearing. The bottom of the heating air duct is fixed to the top surface of the support bracket. A fan is rotatably installed inside the heating air duct. A support tube is fixed inside the fan and the heating air duct of the same diameter as the rotating tube. Several heating tubes are equidistantly installed on the support tube. The exhaust pipe is equipped with a heat recovery assembly, which includes a heat recovery pipe, a water inlet, and a water outlet. The heat recovery pipe is fixedly sleeved on the outer surface of the exhaust pipe. A water storage chamber is opened inside the heat recovery pipe. Another support frame is fixed on the bottom surface of the heat recovery pipe. The water inlet is fixedly connected through the top surface of the heat recovery pipe away from the drying sleeve end, and the water outlet is fixedly connected through the end of the heat recovery pipe near the drying sleeve end. Limiting plates are fixed on the outer surfaces of the drying drums at both ends of the guide spiral plate. Fixed sleeves are slidably attached to the outer sides of the limiting plates. The two fixed sleeves are rotatably fitted onto the outer surfaces of the drying drums. The two fixed sleeves are fixed to the drying sleeve by bolts. The drying rollers inside the two limiting plates are high-density breathable mesh with several support rods. The edge of the guide spiral plate away from the drying roller end slides and fits against the inner wall of the drying sleeve. Several support bases are fixed at equal intervals on the bottom surface of the microwave sleeve to support the microwave sleeve. Both of the limiting plates are fixed with sealing ring plates on their outer sides, and both of the fixing sleeves are provided with sealing grooves that cooperate with the sealing ring plates on their inner sides. Both of the limiting plates are flush with the end face of the drying sleeve. The heating air duct is rotatably connected to a rotating cylinder via a bearing on the side away from the drying sleeve. A connecting frame is fixed inside the rotating cylinder, and the side end of the connecting frame is fixedly connected to the fan shaft. Pulleys are fixedly sleeved on the outer surfaces of both the rotating cylinder and the connecting shaft, and the two pulleys are connected by a high-temperature resistant belt drive. Each of the heating tubes is configured in a vortex shape, with the heating tubes away from the fan end extending into the interior of the rotating tube. A filter screen is fixed to the side of the rotating tube away from the heating air tube by bolts.

2. A method of using the non-contact multi-burner heated carbon black drying device according to claim 1, characterized in that: The method of use includes the following steps: Step (A): Drying the carbon black; Step (A1): Connect the feed inlet to the wet carbon black outlet through a pipe, and fix the feed inlet to the pipe with bolts. Then fix the discharge pipe to the outlet through a flange. Step (A2): The wet carbon black is discharged into the drying sleeve through the feed pipe. At this time, the servo motor runs and drives the connecting shaft to rotate. When the connecting shaft rotates, it drives the second gear to rotate. The second gear drives the first gear it meshes with to rotate, which in turn drives the rotating tube to rotate. When the rotating tube rotates, it drives the drying drum to rotate. When the drying drum rotates, it drives the guide spiral plate to rotate. When the guide spiral plate rotates, it drives the wet carbon black to move into the drying sleeve. Step (A3): Open the microwave sleeve. The magnetron inside the microwave sleeve generates microwaves. Under the action of the high-frequency electromagnetic waves of the microwaves, the molecules inside the material vibrate and interact to generate heat, heating the carbon black to a high temperature in a short time, thus achieving carbon black drying. Step (B), simultaneous hot air drying; Step (B1): When the servo motor drives the connecting shaft to rotate, it synchronously drives the pulley to rotate. The pulley drives the pulley on the rotating drum to rotate through the high-temperature resistant belt, thereby driving the rotating drum to rotate. When the rotating drum rotates, it drives the connecting frame to rotate. The connecting frame drives the fan to rotate. When the fan rotates, it draws in external airflow and discharges it into the heating air duct. Step (B2): When the microwave sleeve is running, the heating tube is turned on simultaneously. The airflow is filtered through the filter screen before entering the heating air duct. After the airflow enters the heating air duct, the heating tube heats and dries the airflow as it passes through the heating tube. The dried high-temperature airflow then enters the drying drum. Step (B3): After the high-temperature airflow enters the drying drum, the moisture in the carbon black distributed on the outer surface of the drying drum and the steam after the carbon black is heated by microwave are discharged into the exhaust pipe due to the air permeability of the drying drum, and the carbon black is further heated. Step (C), High-temperature hot gas preheating and recovery; Step (C1): Connect the water pipe with the water pump to the inlet pipe through the flange, connect the water pump inlet to the cold water tank, and then connect the water pipe with the hot water tank to the outlet pipe through the flange. A one-way valve is installed on the water pipe. Step (C2): When the microwave sleeve is running, the water pump runs synchronously, drawing cold water into the heat recovery pipe so that the heat recovery pipe is filled with cold water. After the high-temperature hot air enters the exhaust pipe, it exchanges heat with the cold water inside the heat recovery pipe. The one-way valve is opened, and the hot water after heat exchange is discharged into the hot water tank. Step (D), Equipment Maintenance; Step (D1): After each drying process, shut down the equipment, loosen the nut to release the filter screen from the rotating cylinder, remove the filter screen for cleaning, and after cleaning and drying, fix it back to the rotating cylinder with nuts and bolts. Step (D2): When cleaning the drying drum, loosen the nuts on the fixed sleeve plate at the exhaust pipe end and the nuts connecting the rotating tube and the connecting ring plate to disengage the fixed sleeve plate from the drying sleeve and the rotating tube from the connecting ring plate. Pull the exhaust pipe to pull the drying drum and the guide spiral plate out of the drying sleeve to clean the drying drum. After cleaning, insert the drying drum and the guide spiral plate into the drying sleeve so that the rotating tube and the gear 2 are aligned and engaged. Then fix the fixed sleeve plate to the drying sleeve and the rotating tube to the connecting ring plate.

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