Drying device with waste heat recovery function for antioxidant production

Abstract

The application discloses a drying device with waste heat recovery function for antioxidant production and belongs to the technical field of powder drying. The application comprises a mounting support, a material bin, a heat preservation tank, a heat exchange bin and a gas pump are mounted on the mounting support, a heat drying tank and a heater are arranged in the heat preservation tank, a feeding pipe and an air exhaust pipe are communicated with the upper portion of the heat drying tank, a discharging pipe and an air inlet pipe are communicated with the lower portion of the heat drying tank, a feeding pipe is connected between the material bin and the feeding pipe, the heat exchange bin is arranged outside the discharging pipe, the heat exchange bin is connected to the middle portion of the air inlet pipe, a drying cylinder is connected to the end of the air inlet pipe away from the heat drying tank, one end of the air exhaust pipe is connected to the air exhaust end of the gas pump, the drying cylinder prevents humid air from entering the heat drying tank, avoids the difficulty of drying the antioxidant due to moisture, meanwhile, the heat exchange bin utilizes waste heat, the hot air plays a further heating effect on the humid antioxidant, and the rapid drying of the antioxidant is accelerated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of powder drying, in particular to a drying device with waste heat recovery function for antioxidant production. BACKGROUND

[0002] The antioxidant is also called anti-aging agent. In the process of long-term storage and use, rubber products will gradually stick, harden and become brittle due to the effects of heat, oxygen, ozone, variable metal ions, mechanical stress, light, high-energy rays and chemical substances. The phenomenon that the mechanical physical and mechanical properties of the rubber products decrease with time and the elasticity decreases is called aging. With the progress and development of the aging process, the performance of the rubber products will gradually decrease until the rubber products completely lose their value. Therefore, the antioxidant needs to be added to the rubber products to improve their resistance to various destructive effects, delay or inhibit the aging process, and prolong the storage period and service life of the rubber products.

[0003] The production of the anti-aging agent is usually carried out by heating reaction of three liquids of diphenylamine, methylstyrene and a catalyst in a reaction kettle, using a petroleum ether steam tower to purify the reaction product, crystallizing the purified product to obtain a powder, and then fully drying the powder. The drying equipment usually includes a target dryer and a double-cone rotary vacuum dryer. Although the target dryer can heat more uniformly, it needs the circulation of air flow and is used for drying at normal pressure, which may cause partial leakage. Although the double-cone rotary vacuum dryer has better sealing performance and no leakage, it has uneven heating, needs a long drying time, has a small capacity and is not suitable for mass production, and the inner wall is not easy to clean. SUMMARY

[0004] The present application aims to provide a drying device with waste heat recovery function for antioxidant production to solve the problems in the background art.

[0005] In order to solve the above technical problems, the present application provides the following technical scheme: a drying device with waste heat recovery function for antioxidant production, comprising a mounting bracket, a material bin, a heat preservation tank, a heat exchange bin and a gas pump mounted on the mounting bracket, wherein the heat preservation tank is located below the material bin, the heat preservation tank is internally provided with a heat drying tank and a heater, the upper part of the heat drying tank is communicated with a feeding pipe and an air exhaust pipe, the lower part of the heat drying tank is communicated with a discharging pipe and an air inlet pipe, the feeding pipe, the discharging pipe, the air exhaust pipe and the air inlet pipe all penetrate through the heat preservation tank, a material conveying pipe is connected between the material bin and the feeding pipe, the heat exchange bin is located outside the discharging pipe and is connected to the middle part of the air inlet pipe, the end of the air inlet pipe away from the heat drying tank is connected with a drying cylinder, one end of the air exhaust pipe is connected with the air exhaust end of the gas pump, and the end of the air inlet pipe and the air exhaust pipe communicated with the heat drying tank is provided with a ceramic membrane filter piece.

[0006] Furthermore, an electric actuator is installed on one side of the hopper, and a sealing plug is provided on the electric actuator to seal the feed pipe. An auger is rotatably installed inside the feed pipe, and a first motor is installed at the bottom of the hopper. The motor shaft of the first motor is connected to the auger. The oxidant that has reacted into powder is still in a moist state after being separated from the petroleum ether liquid. The moist oxidant powder is stored in the hopper. As the electric actuator lifts the sealing plug, the feed pipe is connected to the feed pipe. The first motor drives the auger to rotate, and a certain amount of oxidant powder in the hopper is transported by the auger to the feed pipe and enters the hot drying tank through the feed pipe. After the auger stops rotating, the electric actuator drives the sealing plug to move down, pushing the moist powder in the feed pipe into the hot drying tank, while sealing the feed pipe.

[0007] Furthermore, a gate is slidably installed between the heat preservation tank and the hot drying tank. The gate has a through hole and blocks the discharge pipe. A third motor is installed on the outside of the heat preservation tank. A small gear is installed on the third motor. A toothed groove is opened on the side of the gate near the heat preservation tank. A through groove is opened on the heat preservation tank. The small gear passes through the through groove and meshes with the toothed groove.

[0008] Furthermore, the hot drying tank is equipped with a stirring shaft inside, with both ends of the stirring shaft extending out of the insulation tank. Bearings are installed between the two ends of the stirring shaft and the insulation tank, and labyrinth sealing rings are installed between the two ends of the stirring shaft and the hot drying tank. A driven gear is installed at one end of the stirring shaft, and a second motor is installed on the mounting bracket. The second motor is equipped with a driving gear, and the driving gear meshes with the driven gear for transmission. The heater starts heating the hot drying tank, and the insulation tank acts as an insulator to prevent heat loss. The second motor is energized, driving the driving gear to rotate. The driving gear drives the stirring shaft to rotate through the driven gear. All the stirring rods on the stirring shaft agitate the wet powder in the hot drying tank, so that the wet powder is heated evenly and dried. The labyrinth sealing rings seal the shaft gap between the stirring shaft and the hot drying tank to prevent the oxidant powder from leaking.

[0009] Furthermore, the stirring shaft is hollow inside, and several stirring rods are installed on the stirring shaft. A flexible scraper is installed at the end of each stirring rod away from the stirring shaft. The flexible scrapers are all in contact with the inner wall of the hot drying tank. Each stirring rod extends into the hollow part inside the stirring shaft, and a coil spring is installed between each stirring rod and the stirring shaft. During the hot drying process, the air pump is powered on and draws gas from the hot drying tank through the exhaust pipe. The steam evaporated from the wet powder is extracted through the exhaust pipe, creating a dry environment. The oxidant powder is blocked by the ceramic membrane filter, and the pressure in the powder hot drying tank decreases. Since the air inlet pipe is connected to the outside, external gas is supplemented into the interior of the hot drying tank through the air inlet pipe. However, the air intake speed from the air inlet pipe is lower than the air extraction speed from the exhaust pipe, so that the interior of the hot drying tank is kept in a low-pressure state. Under low pressure, the evaporation temperature of the solution decreases, that is, the petroleum ether component of the wet powder is more easily volatilized under low pressure, which accelerates the hot drying speed of the oxidant powder.

[0010] Furthermore, a piston is slidably mounted on the inner side of the stirring shaft away from the driven gear. A spring is installed between the piston and the stirring shaft. An inner guide rope is wound around one end of each stirring rod inside the stirring shaft. One end of all the inner guide ropes is connected to the piston. After the oxidant powder is dried, the air pump stops working, the air pressure inside the hot drying tank returns to normal pressure, the second motor continues to drive the stirring shaft to rotate, and the third motor is energized to drive the pinion to rotate. The pinion drives the gate to move, and the through hole on the gate is aligned with the discharge pipe. The oxidant powder leaks downward from the discharge pipe. At the same time as the pinion rotates, the mounting shaft of the pinion winds up the outer guide rope. The other end of the outer guide rope pulls the fork to move. The fork abuts against the baffle and pulls the piston outward through the baffle.

[0011] Furthermore, a fork is rotatably mounted at one end of the insulated container, and a baffle is mounted on the side of the piston away from the inner guide cable. The fork slides in contact with the piston. Several guide buckles are also provided on the outside of the insulated container, and an outer guide cable is mounted in each of the guide buckles. One end of the outer guide cable is connected to the fork, and the other end is wound around the mounting shaft of the pinion. When the piston moves, it pulls the inner guide cable, causing all the stirring rods to rotate. The stirring rods drive the flexible scraper to deflect. The stirring rods on the left half of the stirring shaft rotate counterclockwise, and the stirring rods on the right half of the stirring shaft rotate clockwise. The flexible scraper remains in contact with the inner guide cable. The contact between the inner wall of the hot drying tank and the overlapping part of each pair of adjacent flexible scrapers on the rotation path, as the stirring shaft continues to rotate, the flexible scrapers on the stirring rods push the oxidant powder towards the discharge pipe, so that all the dried powder in the hot drying tank is pushed out of the discharge pipe, while ensuring that there is no residue on the inner wall of the hot drying tank. After the material is discharged, the third motor is powered on to drive the pinion to rotate, the gate plate resets and blocks the discharge pipe, the outer guide rope is released, the piston is reset under the action of the spring, after the piston is reset, all the inner guide ropes are also released, and all the stirring rods are reset under the action of the coil spring, so as to carry out subsequent stirring operations.

[0012] Furthermore, the discharge pipe is internally equipped with several heat dissipation pipes, which pass through the discharge pipe in the same direction as the air inlet pipe. A moisture-absorbing vortex rod is rotatably installed inside the drying cylinder, with moisture-absorbing material applied to its surface. A drain pipe is located at the bottom of the moisture-absorbing vortex rod. A drain ring groove is provided on the drying cylinder at the location corresponding to the drain pipe. When the oxidant powder with residual heat falls from the discharge pipe, it contacts several heat dissipation pipes, causing the heat dissipation pipes to absorb heat and dissipate it into the heat exchange chamber. When the air pump restarts, external gas first enters the air inlet pipe through the drying cylinder, and then enters the drying chamber. The gas flows over the surface of the moisture-absorbing vortex rod, and the moisture in the gas is adsorbed by the moisture-absorbing material. Under the impact of the airflow, the moisture-absorbing vortex rod rotates. As the humidity in the moisture-absorbing material increases, the water falls down along the surface of the moisture-absorbing vortex rod. After reaching the bottom of the moisture-absorbing vortex rod, the water is thrown towards the edge of the moisture-absorbing vortex rod and finally thrown into the drain ring groove through the drain pipe. Dry air enters the heat exchange chamber from the air inlet pipe and takes away the residual heat dissipated in the heat exchange chamber. The hot air enters the hot drying tank to prevent humid air from entering the hot drying tank and avoid the oxidant from being difficult to dry due to moisture. At the same time, the residual heat is utilized. The hot air further heats the humid oxidant and accelerates the rapid drying of the oxidant.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0014] 1. During the hot drying process, the air pump draws gas from the hot drying tank. The vapor evaporated from the wet powder is extracted through the air extraction pipe to create a dry environment. The oxidant powder is blocked by the ceramic membrane filter. The inside of the hot drying tank is kept at a low pressure. Under low pressure, the evaporation temperature of the solution decreases. Under low pressure, the petroleum ether component of the wet powder is more likely to volatilize, which accelerates the hot drying speed of the oxidant powder.

[0015] 2. While feeding the material, the piston is moved by the external guide rope. The piston pulls the internal guide rope, causing all the stirring rods to rotate. The stirring rods drive the flexible scraper to deflect. The stirring rods on the left half of the stirring shaft rotate counterclockwise, and the stirring rods on the right half of the stirring shaft rotate clockwise. As the stirring shaft continues to rotate, the flexible scraper on the stirring rod pushes the oxidant powder towards the discharge pipe, so that all the dried powder in the hot drying tank is pushed out of the discharge pipe, while ensuring that there is no residue on the inner wall of the hot drying tank.

[0016] 3. External gas first enters the inlet pipe through the drying cylinder. After entering the drying cylinder, the gas flows over the surface of the moisture-absorbing vortex rod. The moisture in the gas is absorbed by the moisture-absorbing material. Under the impact of the airflow, the moisture-absorbing vortex rod rotates. When the humidity in the moisture-absorbing material increases, the water is thrown into the drain ring groove through the drain pipe. Dry air enters the heat exchange chamber from the inlet pipe and carries away the residual heat in the heat exchange chamber, preventing humid air from entering the hot drying tank and avoiding the oxidant from being difficult to dry due to moisture. At the same time, the residual heat is utilized, and the hot air further heats the humid oxidant, accelerating the rapid drying of the oxidant. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall appearance structure of the present invention;

[0019] Figure 2 This is a side view schematic diagram of the overall appearance structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the overall internal structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the stirring shaft part of the present invention;

[0022] Figure 5 This is the present invention. Figure 3 Schematic diagram of the structure of section AA in the middle;

[0023] Figure 6 This is a schematic diagram of the internal side view structure of the present invention;

[0024] Figure 7 This is a side sectional view of the hot drying tank of the present invention;

[0025] Figure 8 This is a top view of the drying cylinder of the present invention;

[0026] In the diagram: 1. Insulation tank; 2. Hot drying tank; 3. Hopper; 4. Conveying pipe; 5. Screwdriver; 6. First motor; 7. Electric actuator; 8. Sealing plug; 9. Feed pipe; 10. Discharge pipe; 11. Air extraction pipe; 12. Air pump; 13. Stirring shaft; 14. Stirring rod; 15. Flexible scraper; 16. Labyrinth sealing ring; 17. Bearing; 18. Driven gear; 19. Driven gear; 20. Second motor; 21. Piston; 22. Spring; 23. Fork; 24. Inner guide rope; 25. Outer guide rope; 26. Gate; 27. Pinion; 28. Air inlet pipe; 29. ​​Heat exchange chamber; 30. Drying cylinder; 31. Moisture-absorbing vortex rod; 32. Drain pipe. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-8 This invention provides a technical solution: a drying device for antioxidant production with waste heat recovery function, comprising a mounting bracket, on which a silo 3, an insulation tank 1, a heat exchange chamber 29, and an air pump 12 are mounted. The insulation tank 1 is located below the silo 3, and a hot drying tank 2 and a heater are arranged inside the insulation tank 1. The upper part of the hot drying tank 2 is connected to an inlet pipe 9 and an exhaust pipe 11, and the lower part of the hot drying tank 2 is connected to an outlet pipe 10 and an air inlet pipe 28. The material pipe 10, the exhaust pipe 11, and the air inlet pipe 28 all pass through the heat preservation tank 1. The material hopper 3 is connected to the feed pipe 9 by a conveying pipe 4. The heat exchange chamber 29 is located outside the discharge pipe 10 and is connected to the middle of the air inlet pipe 28. The end of the air inlet pipe 28 away from the heat drying tank 2 is connected to the drying cylinder 30. One end of the exhaust pipe 11 is connected to the exhaust end of the air pump 12. Ceramic membrane filters are installed at the ends of the air inlet pipe 28 and the exhaust pipe 11 that are connected to the heat drying tank 2.

[0029] An electric actuator 7 is installed on one side of the silo 3. A sealing plug 8 is installed on the electric actuator 7 to seal the feed pipe 9. An auger 5 is installed inside the feed pipe 4. A first motor 6 is installed at the bottom of the silo 3. The motor shaft of the first motor 6 is connected to the auger 5. A stirring shaft 13 is installed inside the hot drying tank 2. Both ends of the stirring shaft 13 extend out of both ends of the heat preservation tank 1. Bearings 17 are installed between the two ends of the stirring shaft 13 and the heat preservation tank 1. Labyrinth sealing rings 16 are installed between the two ends of the stirring shaft 13 and the hot drying tank 2. A driven gear 18 is installed at one end of the stirring shaft 13. A second motor 20 is installed on the mounting bracket. A driving gear 19 is installed on the second motor 20. The driving gear 19 meshes with the driven gear 18 for transmission. The oxidant powder that has reacted into powder is separated from the petroleum ether liquid and is still in a moist state. The moist oxidant powder is stored in the silo 3. With the electric actuator... Rod 7 lifts the sealing plug 8, connecting the conveying pipe 4 to the feed pipe 9. The first motor 6 drives the auger 5 to rotate, and a certain amount of oxidant powder in the hopper 3 is conveyed by the auger 5 to the feed pipe 9 and enters the hot drying tank 2 through the feed pipe 9. After the auger 5 stops rotating, the electric push rod 7 drives the sealing plug 8 to move down, pushing the wet powder in the feed pipe 9 into the hot drying tank 2 and sealing the feed pipe 9 at the same time. The heater starts to heat the hot drying tank 2, and the heat preservation tank 1 plays the role of heat insulation to prevent heat loss. The second motor 20 is powered on to drive the drive gear 19 to rotate. The drive gear 19 drives the stirring shaft 13 to rotate through the driven gear 18. All the stirring rods 14 on the stirring shaft 13 agitate the wet powder in the hot drying tank 2, so that the wet powder is heated evenly and dried. The labyrinth sealing ring 16 seals the shaft gap between the stirring shaft 13 and the hot drying tank 2 to prevent the oxidant powder from leaking.

[0030] The stirring shaft 13 is hollow inside, and several stirring rods 14 are mounted on it. A flexible scraper 15 is installed at the end of each stirring rod 14 furthest from the stirring shaft 13. All flexible scrapers 15 contact the inner wall of the hot drying tank 2. Each stirring rod 14 extends into the hollow portion of the stirring shaft 13. A coil spring is installed between each stirring rod 14 and the stirring shaft 13. A piston 21 is slidably mounted on the inner side of the stirring shaft 13 at the end furthest from the driven gear 18. A spring 22 is installed between the piston 21 and the stirring shaft 13. One end of the stirring rod 14 located inside the stirring shaft 13 is wound with an inner guide rope 24. One end of all the inner guide ropes 24 is connected to the piston 21. A gate 26 is slidably installed between the heat preservation tank 1 and the hot drying tank 2. The gate 26 has a through hole and blocks the discharge pipe 10. A third motor is installed on the outside of the heat preservation tank 1. A pinion 27 is installed on the third motor. A toothed groove is opened on the side of the gate 26 near the heat preservation tank 1. A through groove is opened on the heat preservation tank 1. The pinion 27 passes through the through groove and meshes with the toothed groove.

[0031] During the heat drying process, the air pump 12 is powered on and draws gas from the heat drying tank 2 through the suction pipe 11. Vapor evaporated from the damp powder is extracted through the suction pipe 11, creating a dry environment. The oxidant powder is blocked by the ceramic membrane filter, reducing the pressure inside the powder heat drying tank 2. Since the inlet pipe 28 is connected to the outside, external gas enters the heat drying tank 2 through the inlet pipe 28. However, the gas intake speed from the inlet pipe 28 is lower than the extraction speed from the suction pipe 11, maintaining a low-pressure state inside the heat drying tank 2. Under this low-pressure state, the evaporation temperature of the solution decreases, meaning that the damp powder evaporates under low-pressure conditions. The oxidant powder is more easily volatilized, which accelerates the drying speed of the oxidant powder. After the oxidant powder is dried, the air pump 12 stops working, and the air pressure inside the drying tank 2 returns to normal pressure. The second motor 20 continues to drive the stirring shaft 13 to rotate. The third motor is powered on and drives the pinion 27 to rotate. The pinion 27 drives the gate 26 to move. The through hole on the gate 26 is aligned with the discharge pipe 10, and the oxidant powder leaks downward from the discharge pipe 10. At the same time as the pinion 27 rotates, the mounting shaft of the pinion 27 winds up the outer guide rope 25. The other end of the outer guide rope 25 pulls the fork 23 to move. The fork 23 abuts against the baffle and pulls the piston 21 outward through the baffle.

[0032] One end of the heat-insulating tank 1 is rotatably equipped with a fork 23. A baffle is provided on the side of the piston 21 away from the inner guide cable 24. The fork 23 slides in contact with the piston 21. Several guide buckles are also provided on the outside of the heat-insulating tank 1. An outer guide cable 25 is provided in the guide buckles. One end of the outer guide cable 25 is connected to the fork 23, and the other end of the outer guide cable 25 is wound around the mounting shaft of the pinion 27. When the piston 21 moves, it pulls the inner guide cable 24, causing all the stirring rods 14 to rotate. The stirring rods 14 drive the flexible scraper 15 to deflect. The stirring rods 14 on the left half of the stirring shaft 13 rotate counterclockwise, and the stirring rods 14 on the right half of the stirring shaft 13 rotate clockwise. The flexible scraper 15 remains in contact with the heat-drying tank 2. The contact between the inner walls is such that every two adjacent flexible scrapers 15 have overlapping parts on the rotation path. As the stirring shaft 13 continues to rotate, the flexible scrapers 15 on the stirring rod 14 push the oxidant powder towards the discharge pipe 10, so that all the dried powder in the hot drying tank 2 is pushed out of the discharge pipe 10, while ensuring that there is no residue on the inner wall of the hot drying tank 2. After the material is discharged, the third motor is powered on to drive the pinion 27 to rotate, the gate 26 resets and blocks the discharge pipe 10, the outer guide rope 25 is released, the piston 21 is reset under the action of the spring 22, after the piston 21 is reset, all the inner guide ropes 24 are also released, and all the stirring rods 14 are reset under the action of the coil spring, so as to carry out subsequent stirring operations.

[0033] The discharge pipe 10 has several heat dissipation pipes inside, which pass through the discharge pipe 10. The direction of these heat dissipation pipes is the same as the direction of the air inlet pipe 28. A moisture-absorbing vortex rod 31 is rotatably installed inside the drying cylinder 30. Moisture-absorbing material is arranged on the surface of the moisture-absorbing vortex rod 31, and a drain pipe 32 is located at the bottom of the moisture-absorbing vortex rod 31. A drain ring groove is opened in the drying cylinder 30 at the position corresponding to the drain pipe 32. When the oxidant powder with residual heat falls from the discharge pipe 10, it contacts several heat dissipation pipes, causing the heat dissipation pipes to absorb heat and dissipate it into the heat exchange chamber 29. When the air pump 12 starts working again, the external gas first enters the air inlet pipe 28 through the drying cylinder 30. After the gas enters the drying cylinder 30... As the gas flows over the surface of the moisture-absorbing vortex rod 31, the moisture in the gas is absorbed by the moisture-absorbing material. Under the impact of the airflow, the moisture-absorbing vortex rod 31 rotates. As the humidity in the moisture-absorbing material increases, the water descends along the surface of the moisture-absorbing vortex rod 31. After reaching the bottom of the moisture-absorbing vortex rod 31, the water is thrown towards the edge of the moisture-absorbing vortex rod 31 and finally thrown into the drain ring groove through the drain pipe 32. Dry air enters the heat exchange chamber 29 from the air inlet pipe 28 and takes away the residual heat dissipated in the heat exchange chamber 29. The hot air enters the hot drying tank 2 to prevent humid air from entering the hot drying tank 2, thus avoiding the oxidant from being difficult to dry due to moisture. At the same time, the residual heat is utilized, and the hot air further heats the humid oxidant, accelerating the rapid drying of the oxidant.

[0034] The working principle of this invention: The oxidant, which has reacted into powder, is separated from the petroleum ether liquid while still in a moist state. The moist oxidant powder is stored in the silo 3. As the electric push rod 7 lifts the sealing plug 8, the conveying pipe 4 is connected to the feed pipe 9. The first motor 6 drives the auger 5 to rotate. A certain amount of oxidant powder in the silo 3 is conveyed by the auger 5 into the feed pipe 9 and enters the hot drying tank 2 through the feed pipe 9. After the auger 5 stops rotating, the electric push rod 7 drives the sealing plug 8 to move down, pushing the moist powder in the feed pipe 9 into the hot drying tank. In step 2, the feed pipe 9 is simultaneously blocked, and the heater begins to heat the hot drying tank 2. The heat preservation tank 1 serves to insulate against heat loss. The second motor 20 is powered on, driving the drive gear 19 to rotate. The drive gear 19 drives the stirring shaft 13 to rotate through the driven gear 18. All the stirring rods 14 on the stirring shaft 13 agitate the wet powder in the hot drying tank 2, so that the wet powder is heated evenly and dried. The labyrinth sealing ring 16 seals the shaft gap between the stirring shaft 13 and the hot drying tank 2 to prevent the oxidant powder from leaking.

[0035] During the heat drying process, the air pump 12 is powered on and draws gas from the heat drying tank 2 through the suction pipe 11. Vapor evaporated from the damp powder is extracted through the suction pipe 11, creating a dry environment. The oxidant powder is blocked by the ceramic membrane filter, reducing the pressure inside the powder heat drying tank 2. Since the inlet pipe 28 is connected to the outside, external gas enters the heat drying tank 2 through the inlet pipe 28. However, the gas intake speed from the inlet pipe 28 is lower than the extraction speed from the suction pipe 11, maintaining a low-pressure state inside the heat drying tank 2. Under this low-pressure state, the evaporation temperature of the solution decreases, meaning that the damp powder evaporates under low-pressure conditions. The oxidant powder is more easily volatilized, which accelerates the drying speed of the oxidant powder. After the oxidant powder is dried, the air pump 12 stops working, and the air pressure inside the drying tank 2 returns to normal pressure. The second motor 20 continues to drive the stirring shaft 13 to rotate. The third motor is powered on and drives the pinion 27 to rotate. The pinion 27 drives the gate 26 to move. The through hole on the gate 26 is aligned with the discharge pipe 10, and the oxidant powder leaks downward from the discharge pipe 10. At the same time as the pinion 27 rotates, the mounting shaft of the pinion 27 winds up the outer guide rope 25. The other end of the outer guide rope 25 pulls the fork 23 to move. The fork 23 abuts against the baffle and pulls the piston 21 outward through the baffle.

[0036] When piston 21 moves, it pulls the inner guide cable 24, causing all stirring rods 14 to rotate. The stirring rods 14 drive the flexible scrapers 15 to deflect. The stirring rods 14 on the left half of the stirring shaft 13 rotate counterclockwise, while the stirring rods 14 on the right half of the stirring shaft 13 rotate clockwise. The flexible scrapers 15 remain in contact with the inner wall of the hot drying tank 2. Every two adjacent flexible scrapers 15 have overlapping parts in their rotation path. As the stirring shaft 13 continues to rotate, the flexible scrapers 15 on the stirring rods 14 will oxidize... The powder is pushed towards the discharge pipe 10, so that all the dried powder in the hot drying tank 2 is pushed out of the discharge pipe 10, while ensuring that there is no residue on the inner wall of the hot drying tank 2. After the material is discharged, the third motor is powered on to drive the pinion 27 to rotate, the gate 26 is reset to block the discharge pipe 10, the outer guide rope 25 is released, the piston 21 is reset under the action of the spring 22, after the piston 21 is reset, all the inner guide ropes 24 are also released, and all the stirring rods 14 are reset under the action of the coil spring, so as to carry out subsequent stirring operations.

[0037] When the oxidant powder, still carrying residual heat, falls from the discharge pipe 10, it comes into contact with several heat dissipation pipes, causing the heat dissipation pipes to absorb heat and dissipate the heat into the heat exchange chamber 29. When the air pump 12 starts working again, external gas first enters the air inlet pipe 28 through the drying cylinder 30. After entering the drying cylinder 30, the gas flows over the surface of the moisture-absorbing vortex rod 31. The moisture in the gas is adsorbed by the moisture-absorbing material. Under the impact of the airflow, the moisture-absorbing vortex rod 31 rotates. As the humidity in the moisture-absorbing material increases, water flows along the moisture-absorbing vortex rod 31. As the water descends from the surface and reaches the bottom of the moisture-absorbing vortex rod 31, it is flung towards the edge of the moisture-absorbing vortex rod 31 and finally into the drain ring groove through the drain pipe 32. Dry air enters the heat exchange chamber 29 from the air inlet pipe 28, carrying away the residual heat dissipated in the heat exchange chamber 29. The hot air enters the hot drying tank 2 to prevent humid air from entering the hot drying tank 2, thus avoiding the oxidant from being difficult to dry due to moisture. At the same time, the residual heat is utilized, and the hot air further heats the humid oxidant, accelerating the rapid drying of the oxidant.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An antioxidant production drying device with waste heat recovery function, comprising a mounting bracket, characterized in that: The installation support is provided with a material bin (3), a heat preservation tank (1), a heat exchange bin (29) and a gas pump (12), the heat preservation tank (1) is located below the material bin (3), the heat preservation tank (1) is internally provided with a heat drying tank (2) and a heater, the heat drying tank (2) is communicated with an inlet pipe (9) and an air exhaust pipe (11) at the top, the heat drying tank (2) is communicated with an outlet pipe (10) and an air inlet pipe (28) at the bottom, the inlet pipe (9), the outlet pipe (10), the air exhaust pipe (11) and the air inlet pipe (28) all penetrate through the heat preservation tank (1), the material bin (3) is connected with the inlet pipe (9) through a material conveying pipe (4), the heat exchange bin (29) is located outside the outlet pipe (10) and is connected to the middle part of the air inlet pipe (28), one end of the air inlet pipe (28) away from the heat drying tank (2) is connected with a drying cylinder (30), one end of the air exhaust pipe (11) is connected with the air exhaust end of the gas pump (12), and the air inlet pipe (28) and the air exhaust pipe (11) are both provided with ceramic membrane filter sheets at the end communicated with the heat drying tank (2). The outlet pipe (10) is internally provided with a plurality of heat dissipation pipes, the plurality of heat dissipation pipes penetrate through the outlet pipe (10), the penetrating directions of the plurality of heat dissipation pipes are the same as the layout direction of the air inlet pipe (28), the drying cylinder (30) is internally rotatably provided with a moisture absorption vortex rod (31), the surface of the moisture absorption vortex rod (31) is arranged with a moisture absorption material, the bottom of the moisture absorption vortex rod (31) is provided with a drain pipe (32), and the drying cylinder (30) is provided with a drain ring groove at the position corresponding to the drain pipe (32). The heat drying tank (2) is internally provided with a stirring shaft (13), the stirring shaft (13) is hollow, a plurality of stirring rods (14) are arranged on the stirring shaft (13), one end of each stirring rod (14) away from the stirring shaft (13) is provided with a flexible scraper (15), and the flexible scrapers (15) are all in contact with the inner wall of the heat drying tank (2). The inner side of one end of the stirring shaft (13) away from the driven gear (18) is slidably provided with a piston (21), the piston (21) and the stirring shaft (13) are provided with a spring (22), one end of each stirring rod (14) inside the stirring shaft (13) is wound with an inner lead (24), and one end of all the inner leads (24) is connected to the piston (21). One end of the heat preservation tank (1) is rotatably provided with a yoke (23), one side of the piston (21) away from the inner lead (24) is provided with a baffle, and the yoke (23) is in sliding contact with the piston (21).

2. The antioxidant production drying device with waste heat recovery function according to claim 1, characterized in that: One side of the material bin (3) is provided with an electric push rod (7), the electric push rod (7) is provided with a material sealing plug (8), the material sealing plug (8) blocks the inlet pipe (9), the inside of the material conveying pipe (4) is rotatably provided with an auger (5), the bottom of the material bin (3) is provided with a first motor (6), and the motor shaft of the first motor (6) is connected with the auger (5).

3. The antioxidant production drying device with waste heat recovery function according to claim 1, characterized in that: The heat preservation tank (1) and the hot dry tank (2) are slidably installed with a gate plate (26), the gate plate (26) is provided with a through hole, the gate plate (26) blocks the discharge pipe (10), the third motor is installed on the outside of the heat preservation tank (1), the small gear (27) is installed on the third motor, the side of the gate plate (26) close to the heat preservation tank (1) is provided with a gear slot, the heat preservation tank (1) is provided with a through slot, the small gear (27) is engaged with the gear slot through the through slot.

4. The antioxidant production drying device with waste heat recovery function according to claim 3, characterized in that: The both ends of the stirring shaft (13) extend out of the both ends of the heat preservation tank (1), the bearings (17) are arranged between the both ends of the stirring shaft (13) and the heat preservation tank (1), the labyrinth sealing rings (16) are arranged between the both ends of the stirring shaft (13) and the hot dry tank (2), the driving gear (18) is installed on one end of the stirring shaft (13), the second motor (20) is installed on the mounting bracket, the driving gear (19) is arranged on the second motor (20), and the driving gear (19) is engaged with the driving gear (18) for transmission.

5. The antioxidant production drying device with waste heat recovery function according to claim 4, characterized in that: Each of the stirring rods (14) extends into the hollow position inside the stirring shaft (13), and the coil springs are arranged between each of the stirring rods (14) and the stirring shaft (13).

6. The antioxidant production drying device with waste heat recovery function according to claim 3, characterized in that: The outside of the heat preservation tank (1) is further provided with a plurality of guide buckles, the outer guide cable (25) is arranged in the plurality of guide buckles, one end of the outer guide cable (25) is connected with the fork (23), and the other end of the outer guide cable (25) is wound on the mounting shaft of the small gear (27).

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