Low-temperature desulfurization device for regenerated rubber and desulfurization process of low-temperature desulfurization device

Abstract

The invention discloses a regenerated rubber low-temperature desulfurization device and a desulfurization process thereof, the regenerated rubber low-temperature desulfurization device comprises a desulfurization unit, and the top of the desulfurization unit is provided with a preheating mixing unit. The electric heating pipe is matched with the movable plate to preheat crushed rubber, meanwhile, the electric push rod drives the rake frame to turn over the rubber, preheating mixing of the rubber and a desulfurizing agent is achieved, later desulfurization operation of the rubber is facilitated, the temperature can be monitored in real time through the temperature sensor, it is ensured that the preheating temperature is in a low-temperature state, and the working efficiency is improved. The movable plate is driven to incline through the output end of the air cylinder, rubber conveying is facilitated, the screw rod can be driven to rotate through cooperation of the first motor and the speed reducer, the screw rod can shear and extrude the rubber while rotating, so that a vulcanized cross-linked structure is destroyed, rubber desulfurization operation is achieved, and the low-temperature mechanical desulfurization method is adopted, so that rubber desulfurization efficiency is improved. The rubber can be well desulfurized, the original performance of the rubber is ensured, and the quality of the regenerated rubber is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of regenerated rubber desulfurization, in particular to a regenerated rubber low-temperature desulfurization device and a desulfurization process thereof. Background Art

[0002] When producing recycled rubber in the rubber industry, in order to prevent the residual sulfides in the waste rubber from affecting the processability, physical properties and environmental performance of the recycled rubber, it is necessary to desulfurize the rubber to remove or reduce unnecessary sulfides in the recycled rubber.

[0003] When desulfurizing the recycled rubber, the cleaned and crushed rubber particles are injected into a closed reactor and heated to a high temperature of 300°C-450°C to decompose the rubber particles by heat. During the pyrolysis process, the sulfide in the rubber will decompose and release sulfide gas. With the help of steam or gas, the gasified sulfur will be removed from the rubber, and the remaining part is the desulfurized recycled rubber, thereby completing the desulfurization operation. However, in the prior art, when desulfurizing the rubber, it is carried out at a relatively high temperature, and the sulfide gas needs to be discharged with the help of steam or gas, which causes the rubber to be under the condition of high temperature and oxygen. Therefore, the rubber is very prone to oxidation reaction, which reduces its performance, thereby reducing the quality of rubber regeneration. Summary of the invention

[0004] The purpose of the present invention is to provide a low-temperature desulfurization device for recycled rubber and a desulfurization process thereof, which have the advantages of low-temperature mechanical desulfurization and ensuring the quality of recycled rubber, and solve the problem in the prior art that when desulfurizing rubber, it is carried out at a relatively high temperature and the sulfiding gas needs to be discharged with the help of steam or gas, which causes the rubber to be exposed to high temperature and oxygen. Therefore, the rubber is very susceptible to oxidation reaction, which reduces its performance and thus reduces the quality of rubber regeneration.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a low-temperature desulfurization device for recycled rubber, comprising a desulfurization unit, a preheating and mixing unit is arranged on the top of the desulfurization unit, a crushing unit is arranged on the top of the preheating and mixing unit, and a microcontroller is arranged on one side of the preheating and mixing unit, the desulfurization unit comprises a connecting box, and a reducer and a first motor are arranged on one side of the connecting box, an outer cylinder is connected to the other side of the connecting box, and a spiral rod is movably connected to the inner cavity of the outer cylinder, the preheating and mixing unit comprises a processing box, and a movable plate is movably connected to one side of the inner cavity of the processing box through a rotating shaft, and an electric heating pipe is arranged in the inner cavity of the movable plate, and the One side of the lower end of the inner cavity of the processing box is movably connected to a cylinder via a rotating shaft, and the other end of the cylinder is connected to a movable plate via a rotating shaft, one side of the processing box is fixedly connected to an electric push rod, and the output end of the electric push rod is fixedly connected to a rake frame, a temperature sensor is arranged on the back of the inner cavity of the processing box, the crushing unit comprises a crushing box, and the front and rear ends of the inner cavity of the crushing box are movably connected to a crushing shaft, the front and back ends of the inner cavity of the crushing box are fixedly connected to auxiliary blades, and the auxiliary blades are meshed with the crushing shaft, one end of the crushing shaft passes through the outside of the crushing box and is fixedly connected to a gear, and a second motor is arranged on one side of the gear at the rear end.

[0006] Preferably, the crushing box and the processing box are connected, the processing box and the connecting box are connected, the output shaft of the first motor is connected to the input shaft of the reducer, the output shaft of the reducer extends to the inner cavity of the connecting box and is drivingly connected to one end of the screw rod.

[0007] Preferably, the top of the crushing box is connected to a guide bucket, the top of the guide bucket is movably connected to a cover, the bottom of the second motor is fixedly connected to a bracket, and the other end of the bracket is fixedly connected to the crushing box.

[0008] Preferably, one end of the outer cylinder is connected to a row of pipes, and the surface of the row of pipes is connected to a solenoid valve, and the output end of the microcontroller is connected to the input end of the solenoid valve.

[0009] Preferably, the bottom of the connecting box is fixedly connected to the base, and the bottom of the reducer is fixedly connected to the top of the base, one side of the microcontroller is fixedly connected to the processing box, and a display screen is provided on the other side of the microcontroller, and the output end of the microcontroller is connected to the input end of the display screen.

[0010] Preferably, the output end of the temperature sensor is connected to the input end of the microcontroller, the input ends of the first motor and the second motor are both connected to the output end of the microcontroller, and the output end of the microcontroller is respectively connected to the input ends of the electric heating tube, the cylinder and the electric push rod.

[0011] Preferably, the desulfurization process comprises the following steps:

[0012] A. First, the personnel place the cleaned waste rubber in the inner cavity of the diversion bucket, and pour the desulfurizer into the inner cavity of the diversion bucket. The desulfurizer and rubber are diverted and transmitted to the inner cavity of the crushing box through the diversion bucket. Then, the second motor is turned on by the microcontroller, and the output shaft of the second motor drives the rear gear to rotate. Since the two gears are meshed, the front gear will rotate synchronously during the rotation of the rear gear, and the gear drives the crushing shaft to rotate. Since the auxiliary blade is meshed with the crushing shaft, the crushing shaft cooperates with the auxiliary blade to crush the rubber entering the crushing box, and the desulfurizer and rubber can be preliminarily mixed, thereby completing the crushing and mixing operation of the rubber;

[0013] B. After that, the crushed rubber and the desulfurizer will fall on the upper part of the movable plate in the inner cavity of the treatment box. The desulfurizer and the rubber are supported by the movable plate. The electric heating tube and the electric push rod are turned on by the microcontroller. The heat generated by the operation of the electric heating tube is transferred to the movable plate, so that the movable plate transfers the heat to the rubber. At the same time, the output end of the electric push rod drives the rake frame to reciprocate, so that the rake frame turns the rubber, and then the rubber and the desulfurizer are fully mixed, thereby realizing the preheating and mixing operation of the rubber;

[0014] C. During the preheating and mixing process, the temperature state needs to be controlled between 50 and 100 degrees Celsius. The temperature state is monitored in real time by the temperature sensor, and the monitored temperature data is transmitted to the microcontroller. The microcontroller analyzes the temperature data. If the temperature data reaches the preset value, the microcontroller turns off the electric heating tube and stops preheating. If the temperature data is lower than the preset value, the microcontroller turns on the electric heating tube, so that the electric heating tube cooperates with the movable plate to continuously preheat the rubber until the preset temperature state is reached. In this way, the temperature control operation is realized, and the preheating temperature of the rubber is kept at a low temperature, which effectively prevents the degradation of the rubber due to excessive temperature and affects its performance.

[0015] D. Then, the cylinder is turned on through the microcontroller, and the output end of the cylinder drives one side of the electric heating tube to move, so that the electric heating tube moves around the axis of the rotating shaft, and then the electric heating tube will tilt downward, and the preheated and mixed rubber will fall down along the tilt of the electric heating tube into the inner cavity of the connection box, so as to facilitate the desulfurization of the rubber;

[0016] E. Then the microcontroller starts the first motor, and the output shaft of the first motor transmits the rotational force to the reducer. The reducer decelerates the rotational force and transmits the decelerated rotational force to the screw rod, so that the screw rod rotates. The rubber can be transported while the screw rod rotates. During the transportation process, the surface of the screw rod shears and squeezes the rubber. The rubber is repeatedly sheared and squeezed by the screw rod in the inner cavity of the outer cylinder, thereby destroying the vulcanized cross-linking structure of the rubber and achieving desulfurization. After desulfurization is completed, the solenoid valve is opened by the microcontroller to make the discharge pipe unobstructed, and the desulfurized rubber is discharged through the discharge pipe, thereby completing the desulfurization operation of the rubber.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention drives the gear and the crushing shaft to rotate through the output end of the second motor. Since the crushing shaft and the auxiliary blade are meshed, the waste rubber is crushed through the cooperation of the crushing shaft and the auxiliary blade. The operation of the electric heating tube can generate heat and transfer it to the movable plate, so that the movable plate is used to preheat the crushed rubber. At the same time, the output end of the electric push rod drives the rake frame to turn the rubber, so as to achieve preheating and mixing of the rubber and the desulfurizer, which is convenient for the later desulfurization operation of the rubber. The temperature sensor can monitor the temperature in real time to ensure that the preheating temperature is in a low temperature state. The output end of the cylinder drives one end of the movable plate to move, so that the movable plate is tilted, which is convenient for conveying the preheated mixed rubber to the inside of the connection box. The first motor cooperates with the reducer to drive the spiral rod to rotate. While the spiral rod rotates, the rubber can be sheared and squeezed, so as to destroy the vulcanized cross-linking structure and realize the desulfurization operation of the rubber. By adopting the low-temperature mechanical desulfurization method, not only the rubber can be well desulfurized, but also the original performance of the rubber is ensured, and the quality of the recycled rubber is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the connection structure between the crushing box and the crushing shaft of the present invention;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the outer cylinder of the present invention;

[0023] Figure 5 It is a schematic diagram of the system principle of the present invention.

[0024] In the figure: 1. Desulfurization unit; 11. Connection box; 111. Base; 12. Reducer; 13. First motor; 14. Outer cylinder; 141. Drain pipe; 15. Screw rod; 2. Preheating mixing unit; 21. Processing box; 22. Movable plate; 23. Electric heating pipe; 24. Cylinder; 25. Electric push rod; 26. Rake frame; 27. Temperature sensor; 3. Crushing unit; 31. Crushing box; 311. Guide bucket; 32. Crushing shaft; 33. Auxiliary blade; 34. Gear; 35. Second motor; 4. Microcontroller. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Example 1

[0027] like Figure 1-5 As shown, it is the first embodiment of the present invention, which provides a low-temperature desulfurization device for recycled rubber, including a desulfurization unit 1, a preheating and mixing unit 2 is arranged on the top of the desulfurization unit 1, a crushing unit 3 is arranged on the top of the preheating and mixing unit 2, and a microcontroller 4 is arranged on one side of the preheating and mixing unit 2, the desulfurization unit 1 includes a connecting box 11, and a reducer 12 and a first motor 13 are arranged on one side of the connecting box 11, and an outer cylinder 14 is connected to the other side of the connecting box 11, and the inner cavity of the outer cylinder 14 is movably connected to a spiral rod 15, the preheating and mixing unit 2 includes a processing box 21, and a movable plate 22 is movably connected to one side of the inner cavity of the processing box 21 through a rotating shaft, and the inner cavity of the movable plate 22 is provided with an electric heating pipe 23, and the processing box 2 A cylinder 24 is movably connected to one side of the lower end of the inner cavity through a rotating shaft, and the other end of the cylinder 24 is connected to the movable plate 22 through a rotating shaft. An electric push rod 25 is fixedly connected to one side of the processing box 21, and a rake frame 26 is fixedly connected to the output end of the electric push rod 25. A temperature sensor 27 is arranged on the back of the inner cavity of the processing box 21. The crushing unit 3 includes a crushing box 31, and the front and rear ends of the inner cavity of the crushing box 31 are movably connected to a crushing shaft 32. Auxiliary blades 33 are fixedly connected to the front and back of the inner cavity of the crushing box 31, and the auxiliary blades 33 are meshed with the crushing shaft 32. One end of the crushing shaft 32 passes through the outside of the crushing box 31 and is fixedly connected to a gear 34. A second motor 35 is arranged on one side of the rear end gear 34.

[0028] like Figure 1-5As shown, the output end of the second motor 35 drives the gear 34 and the crushing shaft 32 to rotate. Since the crushing shaft 32 and the auxiliary blade 33 are meshed, the waste rubber is crushed by the cooperation of the crushing shaft 32 and the auxiliary blade 33. The operation of the electric heating tube 23 can generate heat and transfer it to the movable plate 22, so that the movable plate 22 preheats the crushed rubber. At the same time, the output end of the electric push rod 25 drives the rake frame 26 to turn the rubber, thereby realizing the preheating and mixing of the rubber and the desulfurizing agent, which is convenient for the later desulfurization operation of the rubber. During the preheating and mixing of the rubber, the temperature can be monitored in real time by the temperature sensor 27, and the model of the temperature sensor 27 is Lufft WS700, Onset HOBO Water Temperature Sensor, the temperature data detected will be transmitted to the microcontroller 4 through the temperature sensor 27, and the model used by the microcontroller 4 is the ESP32 series single chip microcomputer. The temperature data is analyzed by the microcontroller 4. If the temperature data reaches the preset value, the microcontroller 4 will turn off the electric heating tube 23 and stop preheating. If the temperature data is lower than the preset value, the microcontroller 4 will turn on the electric heating tube 23, so that the electric heating tube 23 cooperates with the movable plate 22 to continuously preheat the rubber until the preset temperature state is reached, ensuring that the preheating temperature is in a low temperature state. The output end of the cylinder 24 drives one end of the movable plate 22 to move, so that the movable plate 22 is tilted, so as to facilitate the delivery of the preheated mixed rubber to the inside of the connection box 11. The first motor 13 cooperates with the reducer 12 to drive the screw rod 15 to rotate. While the screw rod 15 rotates, it can shear and squeeze the rubber, so as to destroy the vulcanized cross-linking structure and realize the desulfurization operation of the rubber. By adopting the low-temperature mechanical desulfurization method, not only can the rubber be desulfurized well, but also the original performance of the rubber is ensured, and the quality of the recycled rubber is effectively improved.

[0029] Example 2

[0030] Reference Figure 1 , 3 , 4 and 5 are the second embodiment of the present invention, which is based on the previous embodiment.

[0031] In this embodiment, the crushing box 31 and the processing box 21 are connected, the processing box 21 and the connecting box 11 are connected, the output shaft of the first motor 13 is connected to the input shaft of the reducer 12, the output shaft of the reducer 12 extends to the inner cavity of the connecting box 11, and is connected to one end of the screw rod 15.

[0032] The top of the crushing box 31 is connected to a guide bucket 311 , and the top of the guide bucket 311 is movably connected to a cover. The bottom of the second motor 35 is fixedly connected to a bracket, and the other end of the bracket is fixedly connected to the crushing box 31 .

[0033] One end of the outer tube 14 is connected to a discharge pipe 141 , and the surface of the discharge pipe 141 is connected to a solenoid valve. The output end of the microcontroller 4 is connected to the input end of the solenoid valve.

[0034] like Figure 1 , 3 , 4 and 5, the crushing box 31 is connected with the processing box 21, and the crushed rubber directly falls on the upper part of the movable plate 22 inside the processing box 21, and is connected with the connecting box 11 through the processing box 21, so as to facilitate the transportation of the preheated mixed rubber to the inside of the connecting box 11, and is connected with the reducer 12 through the first motor 13, and the reducer 12 is connected with the connecting box 11, and when the first motor 13 transmits the rotating force to the reducer 12, the reducer 12 can reduce the speed and transmit the rotating force to the screw rod 15, so that the screw rod 15 rotates to transport, extrude and shear the rubber inside the connecting box 11, It is convenient to realize the desulfurization operation of rubber. The guide bucket 311 can realize the effect of guiding the rubber and the desulfurization agent, and at the same time, it is convenient to transfer the rubber and the desulfurization agent to the inside of the crushing box 31 for crushing. The guide bucket 311 can be closed by the cover to prevent the entry of external impurities when the rubber is processed. The second motor 35 can be stably supported by the bracket to ensure the stability of the second motor 35 during operation. The desulfurized rubber can be discharged through the discharge pipe 141. The opening or closing of the solenoid valve can be controlled by the microcontroller 4, and the solenoid valve can close or open the discharge pipe 141 to realize the on-off operation of the discharge pipe 141.

[0035] Example 3

[0036] Reference Figure 1 , 2 and 5, which are the third embodiment of the present invention, and this embodiment is based on the first two embodiments.

[0037] In this embodiment, the bottom of the connecting box 11 is fixedly connected to the base 111, and the bottom of the reducer 12 is fixedly connected to the top of the base 111, one side of the microcontroller 4 is fixedly connected to the processing box 21, and a display screen is provided on the other side of the microcontroller 4, and the output end of the microcontroller 4 is connected to the input end of the display screen.

[0038] The output end of the temperature sensor 27 is connected to the input end of the microcontroller 4, the input ends of the first motor 13 and the second motor 35 are both connected to the output end of the microcontroller 4, and the output end of the microcontroller 4 is respectively connected to the input ends of the electric heating tube 23, the cylinder 24 and the electric push rod 25.

[0039] like Figure 1 , 2As shown in Figure 5, the connection box 11 and the reducer 12 are supported by the base 111 to ensure the stability of the connection box 11 and the reducer 12. The temperature sensor 27 is connected to the microcontroller 4, and the temperature sensor 27 can transmit the detected data to the microcontroller 4, so that the microcontroller 4 analyzes the data and transmits the data to the display screen for viewing by personnel. If the temperature data detected by the microcontroller 4 reaches a preset value, the microcontroller 4 can control the electric heating tube 23 to stop the preheating operation. On the contrary, when the preset temperature is not reached, the microcontroller 4 will allow the electric heating tube 23 to continue the preheating operation, effectively ensuring that the preheating temperature of the rubber is in a low temperature state, preventing the high temperature from decomposing the rubber and affecting its performance. The microcontroller 4 is connected to the cylinder 24, the electric push rod 25, the first motor 13 and the second motor 35, and the microcontroller 4 can control the cylinder 24, the electric push rod 25, the first motor 13 and the second motor 35 to open or close, thereby realizing automatic control operation and improving convenience of use.

[0040] A desulfurization process for a regenerated rubber low-temperature desulfurization device, the desulfurization process comprising the following steps:

[0041] A. First, the personnel place the cleaned waste rubber in the inner cavity of the diversion bucket 311, and pour the desulfurizer into the inner cavity of the diversion bucket 311, and transmit the desulfurizer and rubber to the inner cavity of the crushing box 31 through the diversion bucket 311. Then, the second motor 35 is turned on by the microcontroller 4, and the rear end gear 34 is driven to rotate by the output shaft of the second motor 35. Since the two gears 34 are meshed, the front end gear 34 is driven to rotate synchronously during the rotation of the rear end gear 34, and the gear 34 drives the crushing shaft 32 to rotate. Since the auxiliary blade 33 is meshed with the crushing shaft 32, the crushing shaft 32 cooperates with the auxiliary blade 33 to crush the rubber entering the crushing box 31, and the desulfurizer and rubber can be preliminarily mixed, thereby completing the crushing and mixing operation of the rubber;

[0042] B. After that, the crushed rubber and the desulfurizing agent fall on the upper side of the movable plate 22 in the inner cavity of the processing box 21. The desulfurizing agent and the rubber are supported by the movable plate 22. The electric heating tube 23 and the electric push rod 25 are turned on by the microcontroller 4. The electric heating tube 23 generates heat and transfers it to the movable plate 22, so that the movable plate 22 transfers the heat to the rubber. At the same time, the output end of the electric push rod 25 drives the rake frame 26 to reciprocate, so that the rake frame 26 turns the rubber, and then the rubber and the desulfurizing agent are fully mixed, thereby realizing the preheating and mixing operation of the rubber.

[0043] C. During the preheating and mixing process, the temperature state needs to be controlled between fifty degrees Celsius and one hundred degrees Celsius. The temperature state is monitored in real time by the temperature sensor 27, and the monitored temperature data of the temperature sensor 27 is transmitted to the microcontroller 4. The temperature data is analyzed by the microcontroller 4. If the temperature data reaches the preset value, the microcontroller 4 will turn off the electric heating tube 23 and stop preheating. If the temperature data is lower than the preset value, the microcontroller 4 will turn on the electric heating tube 23, so that the electric heating tube 23 cooperates with the movable plate 22 to continuously preheat the rubber until the preset temperature state is reached, thereby realizing the temperature control operation, making the preheating temperature of the rubber at a low temperature, and effectively preventing the degradation of the rubber due to excessive temperature and affecting its performance;

[0044] D. Then, the cylinder 24 is turned on by the microcontroller 4. The output end of the cylinder 24 drives one side of the electric heating tube 23 to move, so that the electric heating tube 23 moves around the axis of the rotating shaft, and then the electric heating tube 23 tilts downward. The preheated and mixed rubber falls downward along the tilt of the electric heating tube 23 into the inner cavity of the connection box 11, so as to facilitate the desulfurization of the rubber.

[0045] E. Then the microcontroller 4 turns on the first motor 13, and the output shaft of the first motor 13 transmits the rotational force to the reducer 12. The reducer 12 decelerates the rotational force and transmits the decelerated rotational force to the screw rod 15, so that the screw rod 15 rotates. The screw rod 15 can transport the rubber while rotating. During the transportation process, the surface of the screw rod 15 shears and squeezes the rubber. The rubber is repeatedly sheared and squeezed by the screw rod 15 in the inner cavity of the outer cylinder 14, thereby destroying the vulcanized cross-linking structure of the rubber and achieving desulfurization. After desulfurization is completed, the solenoid valve is opened by the microcontroller 4 to make the discharge pipe 141 unobstructed, and the desulfurized rubber is discharged through the discharge pipe 141, thereby completing the desulfurization operation of the rubber.

[0046] The standard parts used in this application document can all be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented through simple programming by technicians in this field, which is common knowledge in the field. This application is mainly used to protect mechanical devices, so this application no longer explains the control method and circuit connection in detail.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-temperature desulfurization device for recycled rubber, comprising a desulfurization unit (1), characterized in that: The desulfurization unit (1) is provided with a preheating and mixing unit (2) at the top, a crushing unit (3) is provided at the top, and a microcontroller (4) is provided on one side of the preheating and mixing unit (2). The desulfurization unit (1) comprises a connecting box (11), and a reducer (12) and a first motor (13) are provided on one side of the connecting box (11). The other side of the connecting box (11) is connected to an outer cylinder (14), and the inner cavity of the outer cylinder (14) is movably connected to a spiral rod (15). The preheating and mixing unit (2) comprises a processing box (21), and one side of the inner cavity of the processing box (21) is movably connected to a movable plate (22) via a rotating shaft, and the inner cavity of the movable plate (22) is provided with an electric heating pipe (23). One side of the lower end of the inner cavity of the processing box (21) is movably connected to a cylinder (15) via a rotating shaft. 24), and the other end of the cylinder (24) is connected to the movable plate (22) through a rotating shaft, one side of the processing box (21) is fixedly connected to an electric push rod (25), and the output end of the electric push rod (25) is fixedly connected to a rake frame (26), the back side of the inner cavity of the processing box (21) is provided with a temperature sensor (27), the crushing unit (3) comprises a crushing box (31), and the front end and the rear end of the inner cavity of the crushing box (31) are both movably connected to a crushing shaft (32), the front and the back end of the inner cavity of the crushing box (31) are both fixedly connected to an auxiliary blade (33), and the auxiliary blade (33) is meshed with the crushing shaft (32), one end of the crushing shaft (32) passes through the outside of the crushing box (31) and is fixedly connected to a gear (34), and a second motor (35) is provided on one side of the gear (34) at the rear end.

2. A regenerated rubber low-temperature desulfurization device according to claim 1, characterized in that: The crushing box (31) and the processing box (21) are connected to each other, and the processing box (21) and the connecting box (11) are connected to each other. The output shaft of the first motor (13) is connected to the input shaft of the reducer (12). The output shaft of the reducer (12) extends to the inner cavity of the connecting box (11) and is drivingly connected to one end of the screw rod (15).

3. A low-temperature desulfurization device for regenerated rubber according to claim 1, characterized in that: The top of the crushing box (31) is connected to a guide hopper (311), and the top of the guide hopper (311) is movably connected to a cover. The bottom of the second motor (35) is fixedly connected to a bracket, and the other end of the bracket is fixedly connected to the crushing box (31).

4. A low-temperature desulfurization device for regenerated rubber according to claim 1, characterized in that: One end of the outer cylinder (14) is connected to a row pipe (141), and the surface of the row pipe (141) is connected to a solenoid valve, and the output end of the microcontroller (4) is connected to the input end of the solenoid valve.

5. The low-temperature desulfurization device for regenerated rubber according to claim 1, characterized in that: The bottom of the connection box (11) is fixedly connected to a base (111), and the bottom of the reducer (12) is fixedly connected to the top of the base (111); one side of the microcontroller (4) is fixedly connected to the processing box (21), and the other side of the microcontroller (4) is provided with a display screen, and the output end of the microcontroller (4) is connected to the input end of the display screen.

6. A low-temperature desulfurization device for regenerated rubber according to claim 1, characterized in that: The output end of the temperature sensor (27) is connected to the input end of the microcontroller (4), the input ends of the first motor (13) and the second motor (35) are both connected to the output end of the microcontroller (4), and the output end of the microcontroller (4) is respectively connected to the input ends of the electric heating tube (23), the cylinder (24) and the electric push rod (25).

7. The desulfurization process of a regenerated rubber low-temperature desulfurization device according to any one of claims 1 to 6, characterized in that: The desulfurization process includes the following steps: A. First, personnel place the cleaned waste rubber in the inner cavity of the diversion bucket (311), and pour the desulfurizing agent into the inner cavity of the diversion bucket (311), and guide the desulfurizing agent and rubber to the inner cavity of the crushing box (31) through the diversion bucket (311). Then, the second motor (35) is turned on by the microcontroller (4), and the output shaft of the second motor (35) drives the rear end gear (34) to rotate. Since the two gears (34) are meshed, the front end gear (34) is driven to rotate synchronously during the rotation of the rear end gear (34), and the gear (34) drives the crushing shaft (32) to rotate. Since the auxiliary blade (33) is meshed with the crushing shaft (32), the crushing shaft (32) cooperates with the auxiliary blade (33) to crush the rubber entering the crushing box (31), and the desulfurizing agent and the rubber are preliminarily mixed, thereby completing the crushing and mixing operation of the rubber; B. The crushed rubber and the desulfurizing agent fall onto the upper side of the movable plate (22) in the inner cavity of the treatment box (21). The desulfurizing agent and the rubber are supported by the movable plate (22). The electric heating tube (23) and the electric push rod (25) are turned on by the microcontroller (4). The heat generated by the operation of the electric heating tube (23) is transferred to the movable plate (22), so that the movable plate (22) transfers the heat to the rubber. At the same time, the output end of the electric push rod (25) drives the rake frame (26) to reciprocate, so that the rake frame (26) turns over the rubber, and the rubber and the desulfurizing agent are fully mixed, thereby achieving the preheating and mixing operation of the rubber. C. During the preheating and mixing process, the temperature state needs to be controlled within a range of 50 to 100 degrees Celsius. The temperature state is monitored in real time by the temperature sensor (27), and the monitored temperature data is transmitted by the temperature sensor (27) to the microcontroller (4). The temperature data is analyzed by the microcontroller (4). If the temperature data reaches a preset value, the microcontroller (4) turns off the electric heating tube (23) and stops preheating. If the temperature data is lower than the preset value, the microcontroller (4) turns on the electric heating tube (23) so that the electric heating tube (23) cooperates with the movable plate (22) to continuously preheat the rubber until the preset temperature state is reached. In this way, the temperature control operation is realized, and the preheating temperature of the rubber is kept at a low temperature, which effectively prevents the degradation of the rubber due to excessive temperature and affects its performance. D. Then, the cylinder (24) is turned on by the microcontroller (4), and the output end of the cylinder (24) drives one side of the electric heating tube (23) to move, so that the electric heating tube (23) moves around the axis of the rotating shaft, and then the electric heating tube (23) tilts downward, and the preheated and mixed rubber falls downward along the tilt of the electric heating tube (23) into the inner cavity of the connection box (11), thereby facilitating the desulfurization of the rubber; E. Then, the microcontroller (4) turns on the first motor (13), and the output shaft of the first motor (13) transmits the rotational force to the reducer (12). The reducer (12) decelerates the rotational force and transmits the decelerated rotational force to the screw rod (15), so that the screw rod (15) rotates. The screw rod (15) can transport the rubber while rotating. During the transportation process, the surface of the screw rod (15) shears and squeezes the rubber. The rubber is repeatedly sheared and squeezed by the screw rod (15) in the inner cavity of the outer cylinder (14), thereby destroying the vulcanized cross-linked structure of the rubber and achieving desulfurization. After the desulfurization is completed, the solenoid valve is opened by the microcontroller (4) to make the discharge pipe (141) unobstructed, and the desulfurized rubber is discharged through the discharge pipe (141), thereby completing the desulfurization operation of the rubber.

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