Aluminum hydroxide drying device with cooling air volume adjusting function

Abstract

The invention discloses an aluminum hydroxide drying device with a cooling air volume adjusting function, and relates to the technical field of air drying, the aluminum hydroxide drying device comprises a discharging device, a conveyor, an air dryer and an electric heater, the conveyor is arranged between the discharging device and the air dryer, the air dryer comprises an outer wrapping shell, an inner wrapping shell, a partition plate, a heat exchanger and an air feeder, the heat exchanger, the inner wrapping shell and the partition plate are arranged in the outer wrapping shell, the air feeder is installed at the bottom of the outer wrapping shell, the electric heater is connected with the heat exchanger through a pipeline, a feeding line is arranged above the discharging device, a feeding hopper is arranged at the top of the outer wrapping shell, one end of the conveyor is located below the discharging device, and the other end of the conveyor is located below the inner wrapping shell. The other end of the conveyor is located above the feeding hopper, aluminum hydroxide powder needing to be dried is continuously put into the discharging device through the feeding line, the aluminum hydroxide powder is discharged to the conveyor through the discharging device, the aluminum hydroxide powder is put into the air dryer through the conveyor to be air-dried, and moisture in the aluminum hydroxide powder is discharged.

Description

Technical Field

[0001] The invention relates to the technical field of air drying, in particular to a drying device for aluminum hydroxide with a cooling air volume regulating function. Background Art

[0002] As a multifunctional compound, the chemical aluminum hydroxide plays a very important role in many industries due to its unique physical and chemical properties. It is mainly used in flame retardants, coatings, building materials, paper fillings, paints, inks, toothpastes, medical treatments, cosmetic fillings, water treatment agents, phosphorus-free laundry detergents, catalyst carriers, etc. Different fields have different requirements for the physical and chemical indicators of chemical aluminum hydroxide, and the production processes and products vary greatly. The particle size ranges from 1 micron to 200 microns, and the moisture content ranges from 2% to 30%. The existing integrated equipment for drying, cooling and screening of aluminum hydroxide is unstable and does not meet the standards during operation. In addition, due to the uneven delivery of aluminum hydroxide powder on the feeding line, there are sometimes partial empty lines and sometimes intermittent full lines, which makes the amount of aluminum hydroxide powder processed by the air dryer in a period of time inconsistent, and the moisture drying quality is uneven, which seriously affects the production efficiency. Summary of the invention

[0003] The object of the present invention is to provide a drying device for aluminum hydroxide with a cooling air volume adjustment function to solve the problems raised in the prior art.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a drying device for aluminum hydroxide with a cooling air volume adjustment function, comprising a feeder, a conveyor, an air dryer and an electric heater, the conveyor being arranged between the feeder and the air dryer, the air dryer comprising an outer shell, an inner shell, a partition, a heat exchanger and an air blower, the heat exchanger, the inner shell and the partition being arranged inside the outer shell, the air blower being installed at the bottom of the outer shell, the electric heater being connected to the heat exchanger through a pipeline, a feeding line being arranged above the feeder, a feeding hopper being arranged at the top of the outer shell, one end of the conveyor being located below the feeder, and the other end of the conveyor being located above the feeding hopper, the feeding line continuously feeds the aluminum hydroxide powder to be dried into the feeder, the feeder unloads the aluminum hydroxide powder onto the conveyor, the conveyor feeds the aluminum hydroxide powder into the air dryer for air drying, and discharges the moisture in the aluminum hydroxide powder.

[0005] Furthermore, the feeder includes a feed barrel, a spring, a support ring, a rotating ring, six opening and closing sliders and a sliding ring, wherein the spring, the support ring, the rotating ring, the six opening and closing sliders and the sliding ring are all installed inside the feed barrel, wherein the spring is arranged at the bottom of the feed barrel, the support ring is arranged at the top of the spring, the rotating ring is installed on the support ring for rotation, a thrust ball bearing is arranged between the rotating ring and the support ring, a regular hexagonal groove is arranged on the top of the rotating ring, a pair of follower pins are symmetrically arranged on the rotating ring, a spiral groove is arranged on the inner wall of the feed barrel at the position corresponding to each follower pin, the follower pin is slidably installed in the spiral groove, the opening and closing slider is in a closed state, the aluminum hydroxide powder gradually increases on the sliding ring and the opening and closing slider, and its weight gradually increases. The increased weight will push the sliding ring downward, and the rotating ring also pushes downward, and the follower pin slides in the spiral groove, so that when the rotating ring rotates, the hexagonal groove rotates to push the bottom slider to move, and the bottom slider drives the six opening and closing sliders to gradually open, and the aluminum hydroxide powder discharges downward from the bottom of the feed barrel.

[0006] Furthermore, the sliding ring is located above the rotating ring, and several side sliding blocks are arranged on the outer contour of the sliding ring, and the several side sliding blocks are evenly distributed in a circle. A vertical sliding groove is opened on the inner wall of the feeding barrel at the position corresponding to each side sliding block, and the side sliding blocks are slidably installed in the vertical sliding grooves respectively. Six inclined sliding grooves are opened at the bottom of the sliding ring. If the accumulated weight of the aluminum hydroxide powder in the feeding barrel increases, the spring is further squeezed, and the rotating ring continues to rotate to increase the opening degree between the opening and closing sliding blocks. The driven pin on the rotating ring slides to the end of the spiral groove, and the opening degree between the opening and closing sliding blocks can no longer be increased. The aluminum hydroxide powder is discharged onto the conveyor at the fastest speed. If the accumulated weight of the aluminum hydroxide powder in the feeding barrel decreases, the weight of the aluminum hydroxide powder and the impact force generated when the aluminum hydroxide powder is dropped are not enough to overcome the elastic force of the spring, then the spring pushes the rotating ring upward through the support ring, and the rotating ring rotates to gradually reduce the opening degree of the opening and closing sliding blocks, thereby reducing the discharge amount of aluminum hydroxide powder.

[0007] Furthermore, the six opening and closing sliders are arranged between the rotating ring and the sliding ring, and the six opening and closing sliders are evenly distributed in a ring shape. A bottom slider is arranged below each opening and closing slider, and a cylindrical pin is arranged above each opening and closing slider. Each cylindrical pin is slidably installed in the inclined slide groove respectively, and each bottom slider is slidably installed in the regular hexagonal groove. Since the conveying amount of aluminum hydroxide powder on the feeding line is uneven, sometimes there are partial empty lines, and sometimes there are intermittent full lines. The feeder plays a role of storage and slow release. When the feeding line is empty, it continues to discharge, and the discharge amount gradually decreases. When the feeding line is full, the discharge is slowly increased, and the discharge amount gradually increases. The aluminum hydroxide powder with uneven conveying amount is released in the form of controllable discharge amount, and then the conveying amount of aluminum hydroxide powder on the conveyor fluctuates within a certain degree, so that the fluctuation of the amount of aluminum hydroxide powder processed by the air dryer within a period of time converges within a controllable range, thereby improving the drying quality of the aluminum hydroxide powder.

[0008] Furthermore, the top of the outer shell is inclined, the inner shell is connected to the inner wall of the top of the outer shell, a drying chamber is formed between the inner shell and the inner wall of the outer shell, the feed hopper is connected to the inside of the drying chamber, the partition is arranged below the inner shell, and the partition separates other spaces inside the outer shell into a discharge chamber and a heating chamber, the heating chamber is located on the side of the outer shell close to the discharger, and the conveyor puts the aluminum hydroxide powder from the feed hopper into the drying chamber.

[0009] Further, the blower includes an air inlet cylinder, a servo motor, a fan and a filter screen, wherein the air inlet cylinder is installed at the bottom of the outer shell, the air inlet cylinder is connected to the heating chamber, the filter screen is installed at the bottom of the air inlet cylinder, the servo motor is installed inside the air inlet cylinder, and the fan is installed on the motor shaft of the servo motor; The heat exchanger includes a hot oil circulation pipe and heat exchange fins. Both ends of the hot oil circulation pipe pass through the outer shell. The electric heater is connected to the hot oil circulation pipe through a pipeline. An oil supply pump is provided in the pipeline. The electric heater heats the oil. The oil supply pump transports the hot oil to the hot oil circulation pipe. The heat exchange fins diffuse the heat of the hot oil circulation pipe outward into the heating chamber. The servo motor drives the fan to rotate. The filter prevents dust from being sucked into the air inlet. The fan pushes the airflow through the heat exchange fins to form hot air. The hot air heats the inner shell part, so that the temperature in the drying chamber increases. The oil in the hot oil circulation pipe is in a circulating flow state, and is heated by the electric heater while releasing heat in the heating chamber.

[0010] Furthermore, a pair of rear hot air ducts, a pair of front hot air ducts and a pair of middle hot air ducts are arranged on the inner shell, and the pair of rear hot air ducts, front hot air ducts and middle hot air ducts are symmetrically installed, and the rear hot air ducts, front hot air ducts and middle hot air ducts are connected to the heating chamber and the drying chamber, and the hot air enters the drying chamber through the pair of rear hot air ducts, the pair of front hot air ducts and the pair of middle hot air ducts, and the aluminum hydroxide powder is dried by the hot air entering the drying chamber, and the evaporated water vapor and the dried powder are discharged toward the discharge port under the blowing of the hot air.

[0011] Furthermore, the inner shell is provided with a discharge port at one end of the discharge bin, a discharge chute is provided at the bottom of the discharge bin, a dispersion plate is installed inside the discharge bin, and the dispersion plate is located below the discharge port. An exhaust hole is provided at the top of the outer shell, and a heat cover is installed above the outer shell, the exhaust hole connects the inside of the heat cover with the discharge bin, an exhaust pipe is provided on the heat cover, and the exhaust pipe is connected to the inside of the heat cover, the evaporated water vapor and the dry aluminum hydroxide powder are blown onto the dispersion plate, the airflow changes its flow direction, the heat inside the inner shell heats the top of the outer shell, the temperature between the heat cover and the top of the outer shell increases, the hot air flow rises through the exhaust pipe, so that the inside of the heat cover presents a weak negative pressure state, the evaporated water vapor changes its flow direction at the dispersion plate, enters the heat cover from the exhaust hole upward, and is finally discharged from the exhaust pipe, the dry aluminum hydroxide powder moves downward along the slope of the dispersion plate, and flows out from the discharge chute into the collecting device.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The feeder plays the role of storage and slow release. When the feeding line is empty, it continues to discharge material, and the discharge amount gradually decreases. When the feeding line is full, it slowly increases the discharge amount, and the aluminum hydroxide powder with uneven conveying amount is discharged in the form of controllable feed change amount, so that the conveying amount of aluminum hydroxide powder on the conveyor fluctuates within a certain degree, and the fluctuation of the amount of aluminum hydroxide powder processed by the air dryer within a period of time is converged within a controllable range, thereby improving the drying quality of aluminum hydroxide powder; the temperature between the heat hood and the top of the outer shell increases, and the hot air flow rises through the exhaust pipe, so that the inside of the heat hood presents a weak negative pressure state, and the evaporated water vapor changes its flow direction at the dispersion plate, enters the heat hood from the exhaust hole upward, and is finally discharged from the exhaust pipe, realizing the separation of water vapor and powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ; Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ; Figure 3 The internal structure of the air dryer of the present invention is shown in FIG. Figure 1 ; Figure 4 The internal structure of the air dryer of the present invention is shown in FIG. Figure 2 ; Figure 5 The internal structure of the air dryer of the present invention is shown in FIG. Figure 3 ; Figure 6 The internal structure of the feeder of the present invention is shown in FIG. Figure 1 ; Figure 7 The internal structure of the feeder of the present invention is shown in FIG. Figure 2 ; Figure 8 The internal structure of the feeder of the present invention is shown in FIG. Figure 3 ; Fig. 9 The internal structure of the feeder of the present invention is shown in FIG. Figure 4 .

[0014] In the figure: 1. feeder; 2. conveyor; 3. air dryer; 4. feed barrel; 5. spring; 6. support ring; 7. rotating ring; 8. opening and closing slider; 9. sliding ring; 10. cylindrical pin; 11. driven pin; 12. bottom slider; 13. side slider; 14. feed hopper; 15. outer shell; 16. dispersion plate; 17. inner shell; 18. partition; 19. heat cover; 20. exhaust pipe; 21. hot oil circulation pipe; 22. heat exchange fins; 23. air inlet pipe; 24. servo motor; 25. fan; 26. feed chute; 27. rear hot air duct; 28. front hot air duct; 29. ​​middle hot air duct. DETAILED DESCRIPTION

[0015] 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.

[0016] Example: Figure 1-Figure 9As shown, the present invention provides a technical solution, a drying device for aluminum hydroxide with a cooling air volume adjustment function, comprising a feeder 1, a conveyor 2, an air dryer 3 and an electric heater, the conveyor 2 is arranged between the feeder 1 and the air dryer 3, the air dryer 3 comprises an outer shell 15, an inner shell 17, a partition 18, a heat exchanger and an air blower, the heat exchanger, the inner shell 17 and the partition 18 are arranged inside the outer shell 15, the air blower is installed at the bottom of the outer shell 15, the electric heater is connected to the heat exchanger through a pipeline, a feeding line is arranged above the feeder 1, a feeding hopper 14 is arranged on the top of the outer shell 15, one end of the conveyor 2 is located below the feeder 1, and the other end of the conveyor 2 is located above the feeding hopper 14, the feeding line continuously puts the aluminum hydroxide powder to be dried into the feeder 1, the feeder 1 unloads the aluminum hydroxide powder onto the conveyor 2, and the conveyor 2 puts the aluminum hydroxide powder into the air dryer 3 for air drying to discharge the moisture in the aluminum hydroxide powder.

[0017] The feeder 1 includes a feed barrel 4, a spring 5, a support ring 6, a rotating ring 7, six opening and closing sliders 8 and a sliding ring 9. The spring 5, the support ring 6, the rotating ring 7, the six opening and closing sliders 8 and the sliding ring 9 are all installed inside the feed barrel 4. The spring 5 is arranged at the bottom of the feed barrel 4, the support ring 6 is arranged at the top of the spring 5, the rotating ring 7 is installed on the support ring 6 for rotation, a thrust ball bearing is arranged between the rotating ring 7 and the support ring 6, a regular hexagonal groove is opened on the top of the rotating ring 7, a pair of driven pins 11 are symmetrically arranged on the rotating ring 7, a spiral groove is opened on the inner wall of the feed barrel 4 corresponding to the position of each driven pin 11, the driven pin 11 is slidably installed in the spiral groove, and the sliding ring 9 is located on the rotating ring 7, several side sliders 13 are arranged on the outer contour of the sliding ring 9, and the several side sliders 13 are evenly distributed in a circle. A vertical slide groove is opened on the inner wall of the feed barrel 4 at the position corresponding to each side slider 13, and the side sliders 13 are slidably installed in the vertical slide grooves respectively. Six inclined slide grooves are opened at the bottom of the sliding ring 9, and six opening and closing sliders 8 are arranged between the rotating ring 7 and the sliding ring 9. The six opening and closing sliders 8 are evenly distributed in a ring shape, and a bottom slider 12 is arranged below each opening and closing slider 8, and a cylindrical pin 10 is arranged above each opening and closing slider 8. Each cylindrical pin 10 is slidably installed in the inclined slide groove respectively, and each bottom slider 12 is slidably installed in a regular hexagonal groove.

[0018] The opening and closing slider 8 is in a closed state, and the aluminum hydroxide powder gradually increases on the sliding ring 9 and the opening and closing slider 8, and its weight gradually increases. The increased weight will push the sliding ring 9 downward, and the rotating ring 7 will also push downward, and the driven pin 11 will slide in the spiral groove, so that when the rotating ring 7 rotates, the hexagonal groove will push the bottom slider 12 to move, and the bottom slider 12 will drive the six opening and closing sliders 8 to gradually open, and the aluminum hydroxide powder will be discharged downward from the bottom of the feed barrel 4. If the accumulated weight of the aluminum hydroxide powder in the feed barrel 4 increases, the spring 5 is further squeezed, and the rotating ring 7 continues to rotate to increase the opening degree between the opening and closing sliders 8. The driven pin 11 on the rotating ring 7 slides to the end of the spiral groove, and the opening degree between the opening and closing sliders 8 can no longer be increased, and the aluminum hydroxide powder is discharged to the conveyor 2 at the fastest speed. If the accumulated weight of the aluminum hydroxide powder in the feed barrel 4 decreases, the aluminum hydroxide powder The weight of the alumina powder and the impact force generated when the aluminum hydroxide powder is dropped are not enough to overcome the elastic force of the spring 5, then the spring 5 pushes the rotating ring 7 upwards through the support ring 6, and the rotating ring 7 rotates to gradually reduce the opening degree of the opening and closing slider 8, thereby reducing the discharge amount of the aluminum hydroxide powder. Since the conveying amount of the aluminum hydroxide powder on the feeding line is uneven, sometimes there is a partial empty line, and sometimes there is an intermittent full line. The feeder 1 plays the role of storage and slow release. When the feeding line is empty, it continues to discharge, and the discharge amount gradually decreases. When the feeding line is full, the discharge is slowly increased, and the discharge amount gradually increases. The aluminum hydroxide powder with uneven conveying amount is released in the form of controllable discharge change, thereby making the conveying amount of aluminum hydroxide powder on the conveyor 2 fluctuate within a certain degree, so that the fluctuation of the amount of aluminum hydroxide powder processed by the air dryer 3 within a period of time converges within a controllable range, thereby improving the drying quality of the aluminum hydroxide powder.

[0019] The top of the outer shell 15 is inclined, the inner shell 17 is connected to the inner wall of the top of the outer shell 15, and a drying chamber is formed between the inner shell 17 and the inner wall of the outer shell 15. The feed hopper 14 is connected to the inside of the drying chamber, and the partition 18 is arranged below the inner shell 17. The partition 18 separates the other space inside the outer shell 15 into a feed chamber and a heating chamber. The heating chamber is located on the side of the outer shell 15 close to the feeder 1. The conveyor 2 puts the aluminum hydroxide powder from the feed hopper 14 into the drying chamber. The blower includes an air inlet 23, a servo motor 24, a fan 25 and a filter. The air inlet 23 is installed at the bottom of the outer shell 15, and the air inlet 23 is connected to the heating chamber. The filter is installed at the bottom of the air inlet 23 (not shown in the figure), the servo motor 24 is installed inside the air inlet 23, and the fan 25 is installed On the motor shaft of the servo motor 24, the heat exchanger includes a hot oil circulation pipe 21 and heat exchange fins 22. Both ends of the hot oil circulation pipe 21 pass through the outer shell 15. The electric heater is connected to the hot oil circulation pipe 21 through a pipeline. An oil supply pump is provided in the pipeline. The electric heater heats the oil. The oil supply pump transports the hot oil to the hot oil circulation pipe 21. The heat exchange fins 22 diffuse the heat of the hot oil circulation pipe 21 outward into the heating chamber. The servo motor 24 drives the fan 25 to rotate. The filter prevents dust from being sucked into the air inlet 23. The fan 25 pushes the airflow through the heat exchange fins 22 to form hot air. The hot air heats part of the inner shell 17, so that the temperature in the drying chamber increases. The oil in the hot oil circulation pipe 21 is in a circulating flow state, which is heated by the electric heater while releasing heat in the heating chamber.

[0020] A pair of rear hot air ducts 27, a pair of front hot air ducts 28 and a pair of middle hot air ducts 29 are arranged on the inner shell 17, and the pair of rear hot air ducts 27, the front hot air ducts 28 and the middle hot air ducts 29 are symmetrically installed, and the rear hot air ducts 27, the front hot air ducts 28 and the middle hot air ducts 29 connect the heating chamber and the drying chamber. A discharge port is opened at one end of the inner shell 17 located in the discharge chamber, and a discharge chute 26 is arranged at the bottom of the discharge chamber. A dispersion plate 16 is installed inside the discharge chamber, and the dispersion plate 16 is located below the discharge port. An exhaust hole is opened on the top of the outer shell 15, and a heat cover 19 is installed above the outer shell 15. The exhaust hole connects the inside of the heat cover 19 with the discharge chamber, and an exhaust pipe 20 is arranged on the heat cover 19, and the exhaust pipe 20 is connected with the inside of the heat cover 19.

[0021] Hot air enters the drying chamber through a pair of rear hot air ducts 27, a pair of front hot air ducts 28 and a pair of middle hot air ducts 29. The aluminum hydroxide powder is dried by the hot air entering the drying chamber, and the evaporated water vapor and the dried powder are discharged toward the discharge port under the blowing of the hot air. The evaporated water vapor and the dried aluminum hydroxide powder are blown onto the dispersion plate 16, and the air flow changes its flow direction. The heat inside the inner shell 17 heats the top of the outer shell 15, and the temperature between the heat cover 19 and the top of the outer shell 15 increases. The hot air flow rises through the exhaust pipe 20, causing the inside of the heat cover 19 to present a slight negative pressure state. The evaporated water vapor changes its flow direction at the dispersion plate 16, enters the heat cover 19 from the exhaust hole upward, and is finally discharged from the exhaust pipe 20. The dry aluminum hydroxide powder moves downward along the slope of the dispersion plate 16 and flows out from the discharge chute 26 into the collecting device.

[0022] The working principle of the present invention is as follows: the feeding line continuously feeds the aluminum hydroxide powder to be dried into the feeder 1, the feeder 1 discharges the aluminum hydroxide powder onto the conveyor 2, the conveyor 2 feeds the aluminum hydroxide powder into the air dryer 3 for air drying, and discharges moisture in the aluminum hydroxide powder.

[0023] The opening and closing slider 8 is in a closed state, and the aluminum hydroxide powder gradually increases on the sliding ring 9 and the opening and closing slider 8, and its weight gradually increases. The increased weight will push the sliding ring 9 downward, and the rotating ring 7 will also push downward, and the driven pin 11 will slide in the spiral groove, so that when the rotating ring 7 rotates, the hexagonal groove will push the bottom slider 12 to move, and the bottom slider 12 will drive the six opening and closing sliders 8 to gradually open, and the aluminum hydroxide powder will be discharged downward from the bottom of the feed barrel 4. If the accumulated weight of the aluminum hydroxide powder in the feed barrel 4 increases, the spring 5 is further squeezed, and the rotating ring 7 continues to rotate to increase the opening degree between the opening and closing sliders 8. The driven pin 11 on the rotating ring 7 slides to the end of the spiral groove, and the opening degree between the opening and closing sliders 8 can no longer be increased, and the aluminum hydroxide powder is discharged to the conveyor 2 at the fastest speed. If the accumulated weight of the aluminum hydroxide powder in the feed barrel 4 decreases, the aluminum hydroxide powder The weight of the alumina powder and the impact force generated when the aluminum hydroxide powder is dropped are not enough to overcome the elastic force of the spring 5, then the spring 5 pushes the rotating ring 7 upwards through the support ring 6, and the rotating ring 7 rotates to gradually reduce the opening degree of the opening and closing slider 8, thereby reducing the discharge amount of the aluminum hydroxide powder. Since the conveying amount of the aluminum hydroxide powder on the feeding line is uneven, sometimes there is a partial empty line, and sometimes there is an intermittent full line. The feeder 1 plays the role of storage and slow release. When the feeding line is empty, it continues to discharge, and the discharge amount gradually decreases. When the feeding line is full, the discharge is slowly increased, and the discharge amount gradually increases. The aluminum hydroxide powder with uneven conveying amount is released in the form of controllable discharge change, thereby making the conveying amount of aluminum hydroxide powder on the conveyor 2 fluctuate within a certain degree, so that the fluctuation of the amount of aluminum hydroxide powder processed by the air dryer 3 within a period of time converges within a controllable range, thereby improving the drying quality of the aluminum hydroxide powder.

[0024] The conveyor 2 puts the aluminum hydroxide powder from the feed hopper 14 into the drying chamber, the electric heater heats the oil, the oil supply pump conveys the hot oil to the hot oil circulation pipe 21, the heat exchange fins 22 diffuse the heat of the hot oil circulation pipe 21 outward to the heating chamber, the servo motor 24 drives the fan 25 to rotate, the filter prevents dust from being sucked into the air inlet 23, the fan 25 pushes the air flow through the heat exchange fins 22 to form hot air, the hot air heats the inner shell 17, so that the temperature in the drying chamber increases, and the oil in the hot oil circulation pipe 21 is in a circulating state, which is heated by the electric heater and releases heat in the heating chamber.

[0025] Hot air enters the drying chamber through a pair of rear hot air ducts 27, a pair of front hot air ducts 28 and a pair of middle hot air ducts 29. The aluminum hydroxide powder is dried by the hot air entering the drying chamber, and the evaporated water vapor and the dried powder are discharged toward the discharge port under the blowing of the hot air. The evaporated water vapor and the dried aluminum hydroxide powder are blown onto the dispersion plate 16, and the air flow changes its flow direction. The heat inside the inner shell 17 heats the top of the outer shell 15, and the temperature between the heat cover 19 and the top of the outer shell 15 increases. The hot air flow rises through the exhaust pipe 20, causing the inside of the heat cover 19 to present a slight negative pressure state. The evaporated water vapor changes its flow direction at the dispersion plate 16, enters the heat cover 19 from the exhaust hole upward, and is finally discharged from the exhaust pipe 20. The dry aluminum hydroxide powder moves downward along the slope of the dispersion plate 16 and flows out from the discharge chute 26 into the collecting device.

[0026] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A drying device for aluminum hydroxide with a cooling air volume adjustment function, characterized in that: The invention comprises a feeder (1), a conveyor (2), an air dryer (3) and an electric heater, wherein the conveyor (2) is arranged between the feeder (1) and the air dryer (3), the air dryer (3) comprises an outer shell (15), an inner shell (17), a partition (18), a heat exchanger and an air blower, the heat exchanger, the inner shell (17) and the partition (18) are arranged inside the outer shell (15), the air blower is installed at the bottom of the outer shell (15), the electric heater is connected to the heat exchanger through a pipeline, a feeding line is arranged above the feeder (1), a feeding hopper (14) is arranged at the top of the outer shell (15), one end of the conveyor (2) is located below the feeder (1), and the other end of the conveyor (2) is located above the feeding hopper (14).

2. The drying device for aluminum hydroxide with cooling air volume adjustment function according to claim 1, characterized in that: The feeder (1) comprises a feed barrel (4), a spring (5), a support ring (6), a rotating ring (7), six opening and closing slide blocks (8) and a sliding ring (9). The spring (5), the support ring (6), the rotating ring (7), the six opening and closing slide blocks (8) and the sliding ring (9) are all installed inside the feed barrel (4). The spring (5) is arranged at the bottom of the feed barrel (4), the support ring (6) is arranged at the top of the spring (5), the rotating ring (7) is rotatably installed on the support ring (6), a thrust ball bearing is arranged between the rotating ring (7) and the support ring (6), a regular hexagonal groove is opened at the top of the rotating ring (7), a pair of driven pins (11) are symmetrically arranged on the rotating ring (7), and a spiral groove is opened on the inner wall of the feed barrel (4) at the position corresponding to each driven pin (11), and the driven pin (11) is slidably installed in the spiral groove.

3. The drying device for aluminum hydroxide with cooling air volume adjustment function according to claim 2, characterized in that: The sliding ring (9) is located above the rotating ring (7). A plurality of side sliding blocks (13) are arranged on the outer contour of the sliding ring (9). The plurality of side sliding blocks (13) are evenly distributed in a circular shape. A vertical sliding groove is provided on the inner wall of the feed barrel (4) at a position corresponding to each side sliding block (13). The side sliding blocks (13) are respectively slidably installed in the vertical sliding grooves. Six inclined sliding grooves are provided at the bottom of the sliding ring (9).

4. The drying device for aluminum hydroxide with cooling air volume adjustment function according to claim 3, characterized in that: The six opening and closing sliders (8) are arranged between the rotating ring (7) and the sliding ring (9), and the six opening and closing sliders (8) are evenly distributed in a ring shape. A bottom slider (12) is arranged below each opening and closing slider (8), and a cylindrical pin (10) is arranged above each opening and closing slider (8). Each cylindrical pin (10) is slidably mounted in an inclined sliding groove, and each bottom slider (12) is slidably mounted in a regular hexagonal groove.

5. The drying device for aluminum hydroxide with cooling air volume adjustment function according to claim 1, characterized in that: The top of the outer shell (15) is arranged at an inclination, the inner shell (17) is connected to the inner wall of the top of the outer shell (15), a drying chamber is formed between the inner shell (17) and the inner wall of the outer shell (15), the feed hopper (14) is connected to the inside of the drying chamber, the partition (18) is arranged below the inner shell (17), and the partition (18) separates the other space inside the outer shell (15) into a discharge chamber and a heating chamber, and the heating chamber is located on a side of the outer shell (15) close to the discharge device (1).

6. The drying device for aluminum hydroxide with cooling air volume adjustment function according to claim 5, characterized in that: The air blower comprises an air inlet cylinder (23), a servo motor (24), a fan (25) and a filter screen, wherein the air inlet cylinder (23) is mounted at the bottom of the outer shell (15), the air inlet cylinder (23) is connected to the heating chamber, the filter screen is mounted at the bottom of the air inlet cylinder (23) (not shown in the figure), the servo motor (24) is mounted inside the air inlet cylinder (23), and the fan (25) is mounted on the motor shaft of the servo motor (24); The heat exchanger comprises a hot oil circulation pipe (21) and heat exchange fins (22); both ends of the hot oil circulation pipe (21) penetrate the outer shell (15); the electric heater is connected to the hot oil circulation pipe (21) via a pipeline; an oil supply pump is provided in the pipeline.

7. The drying device for aluminum hydroxide with cooling air volume adjustment function according to claim 5, characterized in that: A pair of rear hot air pipes (27), a pair of front hot air pipes (28) and a pair of middle hot air pipes (29) are arranged on the inner shell (17); the pair of rear hot air pipes (27), the front hot air pipes (28) and the middle hot air pipes (29) are symmetrically installed; the rear hot air pipes (27), the front hot air pipes (28) and the middle hot air pipes (29) are connected to the heating chamber and the drying chamber.

8. The drying device for aluminum hydroxide with cooling air volume adjustment function according to claim 5, characterized in that: The inner shell (17) is provided with a discharge port at one end of the discharge chamber, a discharge chute (26) is provided at the bottom of the discharge chamber, a dispersion plate (16) is installed inside the discharge chamber, and the dispersion plate (16) is located below the discharge port. An exhaust hole is provided at the top of the outer shell (15), and a heat shield (19) is installed above the outer shell (15), the exhaust hole connects the inside of the heat shield (19) and the discharge chamber, and an exhaust pipe (20) is provided on the heat shield (19), and the exhaust pipe (20) is communicated with the inside of the heat shield (19).

Images