A drying device for the preparation of high-purity ammonium perrhenate

Abstract

The present invention relates to the technical field of ammonium rhenate preparation, and particularly relates to a drying device for preparing high-purity ammonium rhenate, which includes a drying inner barrel fixedly installed inside a drying outer barrel. The bottom of the drying outer barrel is fixedly communicated with a discharge funnel, and the bottom of the drying inner barrel is fixedly communicated with a water outlet funnel that penetrates the discharge funnel. A drying mechanism for grading and screening ammonium rhenate particles and uniformly drying them respectively is arranged inside the drying inner barrel. A feeding mechanism for dispersedly adding ammonium rhenate particles into the drying inner barrel is arranged at the top of the drying outer barrel. The drying mechanism includes a supporting vertical pipe arranged inside the drying inner barrel and having its bottom fixed to the water outlet funnel. The present invention can make the ammonium rhenate particles more evenly distributed during drying, can quickly and effectively remove moisture, shorten the drying time of ammonium rhenate, improve the drying efficiency of ammonium rhenate, effectively prevent the situation that ammonium rhenate particles agglomerate and are difficult to disperse, affecting the drying effect, and improve the product quality of high-purity ammonium rhenate.

Description

Technical Field

[0001] The present invention relates to the technical field of ammonium perrhenate preparation, and particularly to a drying device for preparing high-purity ammonium perrhenate. Background Art

[0002] During the preparation of high-purity ammonium perrhenate, the generated ammonium perrhenate precipitate is mainly in granular form. To ensure the purity of the prepared ammonium perrhenate, it is necessary to wash the unreacted perrhenic acid and other impurities in the ammonium perrhenate particles, and then place the washed ammonium perrhenate particles in a drying device for drying to obtain high-purity ammonium perrhenate. The current drying device mainly dries by continuously agitating the ammonium perrhenate particles and heating the air in the device at the same time. However, in the initial stage of drying, the humidity of the ammonium perrhenate particles is relatively high, which easily leads to the agglomeration of ammonium perrhenate particles. After the ammonium perrhenate particles agglomerate, it is difficult to disperse them again by agitation, making it difficult to thoroughly dry the particles sandwiched between the agglomerates, resulting in a significant reduction in the drying effect of ammonium perrhenate, a decrease in the purity of ammonium perrhenate, and an impact on the product quality of high-purity ammonium perrhenate. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a drying device for preparing high-purity ammonium perrhenate, which solves the problem that the prior art is prone to cause agglomeration of ammonium perrhenate particles and difficult to disperse during the initial stage of drying, resulting in poor drying effect.

[0004] To solve the above technical problems, the present invention provides the following technical solutions:

[0005] A drying device for preparing high-purity ammonium perrhenate includes a drying inner barrel fixedly installed inside a drying outer barrel. The bottom of the drying outer barrel is fixedly communicated with a discharge funnel, and the bottom of the drying inner barrel is fixedly communicated with a water discharge funnel that penetrates the discharge funnel. A drying mechanism for grading and screening ammonium perrhenate particles and uniformly drying them respectively is arranged inside the drying inner barrel. A feeding mechanism for dispersedly adding ammonium perrhenate particles into the drying inner barrel is arranged at the top of the drying outer barrel. The drying mechanism includes a support vertical pipe arranged inside the drying inner barrel and fixedly connected to the water discharge funnel at the bottom, a plurality of ventilation holes arranged on the support vertical pipe in a circumferential array distribution, and a support circular plate arranged at the inner top of the drying inner barrel. Three annular filter meshes are rotatably arranged inside the drying inner barrel at intervals and rotate outside the support vertical pipe. The cross-section of the annular filter mesh is trapezoidal, and the mesh holes of the three annular filter meshes gradually decrease from top to bottom. A plurality of connecting vertical rods are fixedly arranged at the inner top of the annular filter mesh. A dispersing and agitating component is arranged at the top of the support vertical pipe for agglomerating and dispersing the ammonium perrhenate particles on the top annular filter mesh. A rotating component is arranged at the top of the support circular plate for synchronously driving the rotation of the three annular filter meshes and shaking the ammonium perrhenate particles thereon. A blanking component is arranged on the drying inner barrel for simultaneously discharging the ammonium perrhenate particles on the three annular filter meshes.

[0006] As a further optimized solution of the present invention, the stirring and dispersing assembly includes a limiting ring seat fixed to the inner top of the drying inner barrel, and an annular gear rotatably arranged outside the supporting circular plate and rotating on the limiting ring seat. A plurality of stirring and dispersing frames are fixedly arranged on the inner bottom of the annular gear in a circumferential array distribution. On one side of the top of the supporting circular plate, a transmission gear meshing with the annular gear is arranged. At the axis of the transmission gear, a first vertical shaft rotatably connected to the inner top wall of the drying outer barrel through a bearing is fixedly arranged. On the supporting circular plate, a transmission assembly is arranged for driving the stirring and dispersing frames to rotate intermittently through transmission.

[0007] As a further optimized solution of the present invention, the transmission assembly includes an annular turntable arranged in the middle of the top of the supporting circular plate, and a grooved wheel rotatably arranged on one side of the annular turntable. A limiting post matching with the grooved wheel is fixedly arranged on one side of the bottom of the annular turntable. At the axis of the grooved wheel, a second vertical shaft penetrating through the top of the drying outer barrel and rotatably connected to it through a bearing is fixedly arranged. A first transmission belt is arranged between the second vertical shaft and the first vertical shaft through pulley transmission.

[0008] As a further optimized solution of the present invention, the rotating assembly includes a connecting circular plate arranged on the top of the supporting vertical pipe, and the connecting circular plate is fixed to the connecting vertical rod on the top annular filter net, and a connecting vertical shaft fixedly arranged on the top of the connecting circular plate. The top of the connecting vertical shaft penetrates through the supporting circular plate and is rotatably connected to the inner top wall of the drying outer barrel through a bearing. A driven gear is fixedly arranged on the top of the connecting vertical shaft. A connecting ring fixed to the annular turntable is fixedly arranged at the bottom of the driven gear.

[0009] As a further optimized solution of the present invention, a servo motor is fixedly installed on one side of the top of the drying outer barrel. A transmission vertical shaft penetrating through the top of the drying outer barrel and rotatably connected to it through a bearing is fixedly arranged on the output shaft of the servo motor. A driving gear meshing with the driven gear is fixedly arranged on the transmission vertical shaft.

[0010] As a further optimized solution of the present invention, the blanking assembly includes a plurality of discharge grooves arranged at the bottom of the annular filter net and opened on the drying inner barrel in a circumferential array distribution. Annular baffles respectively matching with the three annular filter nets are slidably arranged on the drying inner barrel. Arc-shaped baffles sliding with a plurality of discharge grooves are respectively fixedly arranged on the inner side walls of the annular baffles. A plurality of connecting rods are fixedly arranged at equal distances between two adjacent annular baffles. An annular frame sliding with the drying outer barrel is fixedly arranged on the top annular baffle.

[0011] As a further optimized solution of the present invention, driving members for driving the annular baffles to move and fixed to the drying outer barrel are respectively arranged at both ends of the bottom of the annular frame. A protective cover fixed to the drying outer barrel is arranged outside the driving members.

[0012] As a further optimized solution of the present invention, the feeding mechanism includes a feeding funnel disposed at the top of the drying outer barrel, and four feeding pipes fixedly communicated with the bottom of the feeding funnel and distributed in a circumferential array. The bottom of the feeding pipe penetrates the top of the drying outer barrel and extends to be fixedly connected with the supporting circular plate. A limiting circular plate is fixed inside the feeding funnel, and a movable circular plate rotatable with the feeding funnel is arranged on the limiting circular plate. A rotating vertical shaft is fixed to the bottom of the movable circular plate, and the bottom of the rotating vertical shaft penetrates the limiting circular plate and the feeding pipe and is rotatably connected to the outer top wall of the drying outer barrel through a bearing. A second transmission belt is arranged between the bottom of the rotating vertical shaft and the top of the second vertical shaft through a pulley drive.

[0013] As a further optimized solution of the present invention, two symmetrically arranged first feeding holes are formed in the movable circular plate, and second feeding holes matching the four feeding pipes are respectively formed in the limiting circular plate. The two first feeding holes respectively match the two opposite second feeding holes.

[0014] As a further optimized solution of the present invention, a constant-temperature hot air blower is fixedly installed on the drying outer barrel, and an air inlet pipe is fixed to the output end of the constant-temperature hot air blower and penetrates the drying outer barrel, the water outlet funnel and the supporting vertical pipe.

[0015] By means of the above technical solutions, the present invention provides a drying device for preparing high-purity ammonium perrhenate. Compared with the prior art, it has at least the following beneficial effects:

[0016] 1. The present invention screens and classifies ammonium perrhenate particles through a drying mechanism and then dries them. The ammonium perrhenate particles are added to the annular filter screen in the drying inner barrel. Through the mutual cooperation of the stirring and dispersing assembly and the rotating assembly, the ammonium perrhenate particles are more evenly distributed during drying, the moisture can be quickly and effectively removed, the drying time is shortened, the drying efficiency of ammonium perrhenate is improved, and the situation that ammonium perrhenate particles are difficult to disperse due to caking and affect the drying effect is effectively prevented, and the product quality of high-purity ammonium perrhenate is improved.

[0017] 2. The present invention adds ammonium perrhenate particles to the annular filter screen in the drying inner barrel through a feeding mechanism. The ammonium perrhenate in the feeding funnel rotates through the movable circular plate, so that the two first feeding holes are respectively communicated with the two opposite second feeding holes, and then the ammonium perrhenate particles are respectively added to the feeding pipes one after another, and then fall on the periphery of the top of the annular filter screen at the top, so that the ammonium perrhenate particles are fed more dispersedly, which can ensure that the ammonium perrhenate particles are more evenly distributed, reduce the caking rate of the ammonium perrhenate particles, and also improve the uniformity and stability of the subsequent drying process.

[0018] 3. The present invention discharges the ammonium perrhenate particles dried on the three annular filter nets simultaneously by setting a blanking assembly. By pulling up the annular baffle, the annular baffle slides upward in the discharge chute, causing the ammonium perrhenate particles to lack obstruction, slide off the annular filter net into the discharge funnel and then be discharged. This helps the dried ammonium perrhenate to be discharged more conveniently and thoroughly, avoiding the situation that ammonium perrhenate remains in the drying equipment, affecting subsequent drying operations and causing waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation to the present application. In the drawings:

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a front three-dimensional sectional view of the present invention;

[0022] Figure 3 is a schematic diagram of the internal structure of the drying outer barrel of the present invention;

[0023] Figure 4 is a schematic diagram of the structure of the stirring and dispersing assembly of the present invention;

[0024] Figure 5 is a schematic diagram of the structure of the rotating assembly of the present invention;

[0025] Figure 6 is a schematic diagram of the open state of the blanking assembly of the present invention;

[0026] Figure 7 is an exploded view of the feeding mechanism of the present invention;

[0027] Figure 8 is Figure 2 an enlarged schematic view of part A.

[0028] In the figure: 1, drying outer barrel; 2, drying inner barrel; 3, discharge funnel;

[0029] 4, drying mechanism; 41, support vertical pipe; 42, ventilation hole; 43, support circular plate; 44, annular filter net; 45, connecting vertical rod;

[0030] 46, stirring and dispersing assembly; 461, limit ring seat; 462, annular gear; 463, stirring and dispersing frame; 464, transmission gear; 465, vertical shaft one;

[0031] 466, transmission assembly; 4661, annular turntable; 4662, sprocket; 4663, limit post; 4664, vertical shaft two; 4665, transmission belt one;

[0032] 47. Rotating assembly; 471. Connecting circular plate; 472. Connecting vertical shaft; 473. Driven gear; 474. Connecting ring; 475. Servo motor; 476. Driving gear;

[0033] 48. Blanking assembly; 481. Discharge chute; 482. Annular baffle; 483. Connecting rod; 484. Annular frame; 485. Driving member;

[0034] 5. Feeding mechanism; 51. Feeding funnel; 52. Feeding pipe; 53. Limiting circular plate; 54. Movable circular plate; 55. First feeding hole; 56. Second feeding hole; 57. Rotating vertical shaft; 58. Second transmission belt;

[0035] 6. Water outlet funnel; 7. Constant temperature hot air blower; 8. Air inlet pipe. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] First embodiment

[0038] The main purpose of ammonium perrhenate drying is to remove moisture and ensure the purity and stability of the final product. Currently, ammonium perrhenate particles are dried by a drying device. Since ammonium perrhenate particles are prone to caking and forming agglomerates in the initial stage of drying, it will affect the subsequent drying effect. In order to avoid the situation that ammonium perrhenate particles are difficult to disperse and affect the drying effect, and to improve the drying efficiency of ammonium perrhenate, as Figure 1 - Figure 4 and Figure 8 shown, this embodiment provides a drying device for preparing high-purity ammonium perrhenate, which is composed of a drying outer barrel 1, a drying inner barrel 2, a discharge funnel 3, a water outlet funnel 6, a drying mechanism 4 and a feeding mechanism 5. The drying inner barrel 2 is fixedly installed inside the top of the drying outer barrel 1. The discharge funnel 3 and the water outlet funnel 6 are respectively fixedly communicated with the bottoms of the drying outer barrel 1 and the drying inner barrel 2. The discharge funnel 3 penetrates through the water outlet funnel 6 and is fixedly connected thereto. A box body for collecting high-purity ammonium perrhenate can also be provided at the bottom of the discharge funnel 3, and a box body for collecting the drained moisture can also be provided at the bottom of the water outlet funnel 6. The drying mechanism 4 is arranged inside the drying inner barrel 2 and is used for classifying and screening ammonium perrhenate particles and thoroughly drying them separately.

[0039] In order to make the distribution of ammonium perrhenate particles more uniform during drying, the moisture can be removed quickly and effectively, the drying time can be shortened, and the drying efficiency of ammonium perrhenate can be improved. The drying mechanism 4 includes a support vertical pipe 41 arranged inside the drying inner barrel 2 and fixed to the water outlet funnel 6 at the bottom, a plurality of ventilation holes 42 arranged in a circumferential array on the support vertical pipe 41, and a support circular plate 43 arranged at the inner top of the drying inner barrel 2. The support circular plate 43 can also separate the inner top and bottom of the drying inner barrel 2. Three annular filter screens 44 are rotatably arranged inside the drying inner barrel 2 at intervals and rotate outside the support vertical pipe 41. The cross-section of the annular filter screen 44 is trapezoidal, the inclined surface inclination angle of the annular filter screen 44 is set to 5°, and the mesh holes of the three annular filter screens 44 gradually decrease from top to bottom. After the ammonium perrhenate particles are added to the drying inner barrel 2, they directly fall on the annular filter screen 44 at the top. The smaller ammonium perrhenate particles pass through the first annular filter screen 44 and fall on the second annular filter screen 44, and the even smaller ammonium perrhenate particles pass through the second annular filter screen 44 and fall on the third annular filter screen 44. At the same time, the annular filter screen 44 also plays a certain role in draining water from the ammonium perrhenate particles, and the drained water is discharged through the water outlet funnel 6. A number of connecting vertical rods 45 are fixedly arranged in a circumferential array at the inner top of the annular filter screen 44, and the two annular filter screens 44 are fixedly connected to each other through the connecting vertical rods 45.

[0040] A constant temperature hot air blower 7 is fixedly installed on the drying outer barrel 1. The output end of the constant temperature hot air blower 7 is fixed with an air inlet pipe 8 that penetrates through the drying outer barrel 1, the water outlet funnel 6 and the support vertical pipe 41, and the drying outer barrel 1, the water outlet funnel 6 and the support vertical pipe 41 are all hermetically and fixedly connected to the air inlet pipe 8. Since the suitable drying temperature of high-purity ammonium perrhenate is usually between 60°C and 80°C, this temperature range can effectively remove moisture while avoiding the decomposition or damage of ammonium perrhenate. The constant temperature hot air blower 7 heats the air and maintains a constant temperature, thereby providing hot air with a constant temperature to ensure the stability of the drying of high-purity ammonium perrhenate.

[0041] In order to ensure that ammonium perrhenate particles do not agglomerate during drying and to enable the ammonium perrhenate particles to be evenly distributed for the subsequent drying process, a dispersing assembly 46 for dispersing the agglomerated ammonium perrhenate particles on the top annular filter screen 44 is provided at the top of the supporting vertical pipe 41. The dispersing assembly 46 includes a limiting ring seat 461 fixed to the inner top of the drying inner barrel 2, and an annular gear 462 rotatably arranged outside the supporting circular plate 43 and rotating on the limiting ring seat 461. A plurality of dispersing frames 463 distributed in a circumferential array are fixedly arranged on the inner bottom of the annular gear 462. When the annular gear 462 rotates outside the supporting circular plate 43, it drives the dispersing frames 463 to rotate, dispersing the agglomerated ammonium perrhenate particles, preventing the situation where the particles sandwiched between the agglomerates are difficult to be thoroughly dried due to the agglomeration of ammonium perrhenate particles. A transmission gear 464 meshing with the annular gear 462 is arranged on one side of the top of the supporting circular plate 43, and a first vertical shaft 465 rotatably connected to the inner top wall of the drying outer barrel 1 through a bearing is fixedly arranged at the axis of the transmission gear 464.

[0042] A transmission assembly 466 for driving the dispersing frames 463 to rotate intermittently is arranged on the supporting circular plate 43. The transmission assembly 466 includes an annular turntable 4661 arranged in the middle of the top of the supporting circular plate 43, and a sprocket 4662 rotatably arranged on one side of the annular turntable 4661. A limiting post 4663 matching the sprocket 4662 is fixed to one side of the bottom of the annular turntable 4661. A second vertical shaft 4664 passing through the top of the drying outer barrel 1 and rotatably connected to it through a bearing is fixedly arranged at the axis of the sprocket 4662. A first transmission belt 4665 is arranged between the second vertical shaft 4664 and the first vertical shaft 465 through pulley transmission.

[0043] When the annular turntable 4661 rotates, the annular turntable 4661 drives the sprocket 4662 to rotate intermittently through the limiting post 4663. The sprocket 4662 drives the second vertical shaft 4664 to rotate. The second vertical shaft 4664 drives the first vertical shaft 465 to rotate through the first transmission belt 4665. The first vertical shaft 465 drives the annular gear 462 to rotate on the limiting ring seat 461 through the transmission gear 464. The annular gear 462 drives the dispersing frames 463 to rotate intermittently. The dispersing frames 463 intermittently disperse the agglomerated ammonium perrhenate particles on the top annular filter screen 44, which can control the dispersing intensity, reduce the breakage of ammonium perrhenate particles during the dispersing process, and maintain the integrity of the particles.

[0044] Second Embodiment

[0045] In order to ensure the stability of the annular filter screen 44 during rotation and extend the service life of the equipment, as Figure 5As shown in the figure, in this embodiment, a rotating assembly 47 is provided on the top of the supporting circular plate 43 for synchronously driving the rotation of the three annular filters 44 and shaking the ammonium perrhenate particles thereon. Specifically, the rotating assembly 47 includes a connecting circular plate 471 provided at the top of the supporting vertical pipe 41, and the connecting circular plate 471 is fixed to the connecting vertical rod 45 on the top annular filter 44. In addition, a connecting vertical shaft 472 is fixedly provided on the top of the connecting circular plate 471, and the top of the connecting vertical shaft 472 penetrates through the supporting circular plate 43 and is rotatably connected to the inner top wall of the drying outer barrel 1 through a bearing. A driven gear 473 is fixed to the top of the connecting vertical shaft 472. A connecting ring 474 fixed to the annular turntable 4661 is fixed to the bottom of the driven gear 473. A servo motor 475 is fixedly installed on one side of the top of the drying outer barrel 1. A driving vertical shaft that penetrates through the top of the drying outer barrel 1 and is rotatable with it through a bearing is fixedly provided on the output shaft of the servo motor 475. A driving gear 476 meshing with the driven gear 473 is fixedly provided on the driving vertical shaft.

[0046] By starting the servo motor 475, the driving vertical shaft is driven to rotate. The driving vertical shaft drives the driven gear 473 to rotate through the driving gear 476. The driven gear 473 drives the connecting vertical shaft 472 at its bottom to rotate. The connecting vertical shaft 472 drives the connecting circular plate 471 at its bottom to rotate. The connecting circular plate 471 drives the connecting vertical rod 45 at its bottom to rotate. The connecting vertical rod 45 drives the top annular filter 44 to rotate, so as to drive the three annular filters 44 to rotate simultaneously and shake the ammonium perrhenate particles thereon, and the drying of the ammonium perrhenate particles can be carried out more thoroughly.

[0047] Third Embodiment

[0048] In order to make the discharged ammonium perrhenate after drying more thorough and avoid the situation that ammonium perrhenate remains in the drying equipment, which affects the subsequent drying operation and causes waste, as Figure 6 shown, in this embodiment, a blanking assembly 48 is provided on the drying inner barrel 2 for simultaneously discharging the ammonium perrhenate particles on the three annular filters 44. Specifically, the blanking assembly 48 includes a plurality of discharge slots 481 that are circumferentially and arrayedly distributed at the bottom of the annular filter 44 and are opened on the drying inner barrel 2. An annular baffle 482 that respectively matches the three annular filters 44 is slidably provided on the drying inner barrel 2. Arc-shaped baffles that slide with the plurality of discharge slots 481 are respectively fixed to the inner side walls of the annular baffle 482. A plurality of connecting rods 483 that are equidistantly arranged are fixed between two adjacent annular baffles 482. An annular frame 484 that slides with the drying outer barrel 1 is fixed to the top annular baffle 482. Driving members 485 that drive the annular baffle 482 to move and are fixed to the drying outer barrel 1 are respectively provided at both ends of the bottom of the annular frame 484. A protective cover fixed to the drying outer barrel 1 is provided on the outside of the driving member 485.

[0049] After the drying of ammonium perrhenate particles is completed, the driving member 485 is used to push the annular frame 484 upward. The annular frame 484 drives the annular baffle 482 located at the top to slide upward, thereby driving the three annular baffles 482 to move upward simultaneously. The annular baffle 482 is separated from the discharge chute 481, so that the ammonium perrhenate particles on the annular filter screen 44 roll to the bottom of the discharge funnel 3 and are discharged.

[0050] Fourth Embodiment

[0051] To ensure a more uniform distribution of ammonium perrhenate particles, reduce the caking rate of ammonium perrhenate particles, and facilitate more thorough drying. As Figure 7 shown, the feeding mechanism 5 of this embodiment is arranged at the top of the drying outer barrel 1 and is used to disperse and add ammonium perrhenate particles into the drying inner barrel 2. The specific implementation method is that the feeding mechanism 5 includes a feeding funnel 51 arranged at the top of the drying outer barrel 1, and four feeding pipes 52 fixedly connected to the bottom of the feeding funnel 51 and distributed in a circumferential array. The tops of the four feeding pipes 52 are fixedly connected together and connected to the bottom of the feeding funnel 51. The bottom of the feeding pipe 52 penetrates the top of the drying outer barrel 1 and extends to be fixedly connected to the supporting circular plate 43. A limiting circular plate 53 is fixedly arranged inside the feeding funnel 51. An activity circular plate 54 that rotates with the feeding funnel 51 is arranged on the limiting circular plate 53. Two symmetrically arranged feeding holes one 55 are opened on the activity circular plate 54. Feeding holes two 56 that match the four feeding pipes 52 are respectively opened on the limiting circular plate 53. The two feeding holes one 55 respectively match two corresponding feeding holes two 56. A rotating vertical shaft 57 is fixedly arranged at the bottom of the activity circular plate 54, and the bottom of the rotating vertical shaft 57 penetrates the limiting circular plate 53 and the feeding pipe 52 and is rotationally connected to the outer top wall of the drying outer barrel 1 through a bearing. A transmission belt two 58 is arranged between the bottom of the rotating vertical shaft 57 and the top of the vertical shaft two 4664 through a pulley drive.

[0052] When the activity circular plate 54 rotates by a certain angle, the two feeding holes one 55 are respectively communicated with two corresponding feeding holes two 56, and the ammonium perrhenate particles in the feeding funnel 51 respectively enter the two corresponding feeding pipes 52. When the activity circular plate 54 rotates by a certain angle again, the two feeding holes one 55 are respectively communicated with the other two corresponding feeding holes two 56, and the ammonium perrhenate particles respectively enter the other two corresponding feeding pipes 52. Furthermore, the ammonium perrhenate particles respectively fall onto the annular filter screen 44 at the top in the drying inner barrel 2 through the four feeding pipes 52, realizing the dispersed feeding of ammonium perrhenate particles, which is beneficial to more uniform and thorough subsequent drying.

[0053] In the present invention, by dispersing the feeding of ammonium perrhenate particles, agglomerated ammonium perrhenate particles are stirred and dispersed. Then, after the ammonium perrhenate particles are screened and classified, they are dried at a constant temperature, so that the distribution of ammonium perrhenate during drying is more uniform, the moisture can be removed quickly and effectively, the drying time is shortened, and the drying efficiency of ammonium perrhenate is improved.

[0054] During the actual use of this drying equipment, first, turn on the constant-temperature hot air blower 7. The constant-temperature hot air blower 7 inputs hot air into the support vertical pipe 41 through the air inlet pipe 8. The hot air enters the drying inner barrel 2 through the ventilation holes 42 at the top of the support vertical pipe 41. When the temperature in the drying inner barrel 2 reaches the set value, the constant-temperature hot air blower 7 will adjust the working state of the heating element to keep the temperature in the drying inner barrel 2 constant;

[0055] Next, add the ammonium perrhenate particles to be dried into the feed hopper 51. At the same time, start the servo motor 475. The output shaft of the servo motor 475 drives the transmission vertical shaft to rotate. The transmission vertical shaft drives the driving gear 476 at its bottom to rotate. The driving gear 476 drives the driven gear 473 meshing with it to rotate. The driven gear 473 drives the annular turntable 4661 to rotate through the connecting ring 474. The annular turntable 4661 drives the limit post 4663 to rotate around the driven gear 473. The limit post 4663 drives the grooved wheel 4662 to rotate intermittently. The grooved wheel 4662 drives the vertical shaft two 4664 at its axis to rotate. The vertical shaft two 4664 drives the rotating vertical shaft 57 to start intermittent rotation through the transmission belt two 58 at its top. The rotating vertical shaft 57 drives the movable circular plate 54 at its top to rotate a certain angle and then stop for a while. At the same time, the two feed holes one 55 are respectively communicated with the two corresponding feed holes two 56. The ammonium perrhenate particles in the feed hopper 51 enter the two corresponding feed pipes 52 respectively. The movable circular plate 54 rotates another certain angle, and the two feed holes one 55 are respectively communicated with the other two corresponding feed holes two 56. The ammonium perrhenate particles enter the other two corresponding feed pipes 52 respectively, so that the ammonium perrhenate particles fall onto the top annular filter screen 44 in the drying inner barrel 2 through the four feed pipes 52;

[0056] At the same time, when the vertical shaft two 4664 rotates intermittently, it drives the vertical shaft one 465 to rotate through the transmission belt one 4665. The vertical shaft one 465 drives the annular gear 462 to rotate on the limit ring seat 461 through the transmission gear 464. The annular gear 462 drives the dispersion rack 463 to rotate intermittently. The dispersion rack 463 intermittently disperses the agglomerated ammonium perrhenate particles on the top annular filter screen 44. At the same time, the smaller ammonium perrhenate particles pass through the first annular filter screen 44 and fall onto the second annular filter screen 44, and the even smaller ammonium perrhenate particles pass through the second annular filter screen 44 and fall onto the third annular filter screen 44, so that the ammonium perrhenate particles are dispersed on the three annular filter screens 44;

[0057] When the driven gear 473 rotates, it drives the connecting vertical shaft 472 at its bottom to rotate. The connecting vertical shaft 472 drives the connecting circular plate 471 at its bottom to rotate. The connecting circular plate 471 drives the connecting vertical rod 45 at its bottom to rotate. The connecting vertical rod 45 drives the annular filter screen 44 at the top to rotate, thereby driving the three annular filter screens 44 to rotate simultaneously and shake the ammonium perrhenate particles thereon. The ammonium perrhenate particles are evenly dried by hot air at a constant temperature to obtain high-purity ammonium perrhenate;

[0058] Then, a high-purity ammonium perrhenate collection box is placed at the bottom of the discharge funnel 3. Then, two driving members 485 are started. The driving members 485 push the annular frame 484 upward. The annular frame 484 drives the annular baffle 482 at the top to slide upward, thereby driving the three annular baffles 482 to move upward simultaneously. The annular baffle 482 is separated from the discharge chute 481, so that the ammonium perrhenate particles on the annular filter screen 44 roll to the bottom of the discharge funnel 3 and are discharged into the collection box.

[0059] It should be noted that in this article, the terms "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0060] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drying device for preparing high-purity ammonium rhenate, comprising a drying inner barrel (2) fixedly mounted on the inner side of a drying outer barrel (1), characterized in that: The bottom of the drying outer barrel (1) is fixedly connected to a discharge funnel (3), the bottom of the drying inner barrel (2) is fixedly connected to a water discharge funnel (6) penetrating the discharge funnel (3), the inner side of the drying inner barrel (2) is provided with a drying mechanism (4) for classifying and screening the ammonium rhenate particles and drying them uniformly, and the top of the drying outer barrel (1) is provided with a feeding mechanism (5) for dispersing and adding the ammonium rhenate particles to the drying inner barrel (2); The drying mechanism (4) comprises a support vertical pipe (41) arranged inside the drying inner barrel (2) and fixed at the bottom to the water outlet funnel (6), a plurality of ventilation holes (42) arranged in a circumferential array on the support vertical pipe (41), and a support circular plate (43) arranged at the top of the inner side of the drying inner barrel (2), and three annular filter screens (44) arranged at intervals and rotating outside the support vertical pipe (41) are rotatably arranged inside the drying inner barrel (2), the cross section of the annular filter screens (44) is arranged in a trapezoidal shape, and the mesh size of the three annular filter screens (44) gradually decreases from top to bottom. A plurality of connecting vertical rods (45) arranged in a circular array are fixed to the inner top of the annular filter screen (44); a stirring assembly (46) for breaking up the agglomerated ammonium rhenate particles on the top annular filter screen (44) is arranged on the top of the supporting vertical pipe (41); a rotating assembly (47) for synchronously driving the three annular filter screens (44) to rotate and shake the ammonium rhenate particles thereon is arranged on the top of the supporting circular plate (43); and a discharging assembly (48) for simultaneously discharging the ammonium rhenate particles on the three annular filter screens (44) is arranged on the drying inner barrel (2); The dispersing assembly (46) comprises a limiting ring seat (461) fixed to the top of the inner side of the drying inner barrel (2), and a ring gear (462) rotatably arranged on the outer side of the supporting circular plate (43) and rotating on the limiting ring seat (461); a plurality of dispersing racks (463) distributed in a circumferential array are fixedly arranged on the inner side of the bottom of the ring gear (462); a transmission gear (464) meshing with the ring gear (462) is arranged on one side of the top of the supporting circular plate (43); a vertical shaft (465) rotating with the inner top wall of the drying outer barrel (1) via a bearing is fixedly arranged at the axis of the transmission gear (464); and a transmission assembly (466) for driving the dispersing rack (463) to rotate intermittently through transmission is arranged on the supporting circular plate (43); The transmission assembly (466) comprises an annular rotating disk (4661) disposed in the middle of the top of the supporting circular plate (43), and a groove wheel (4662) rotatably disposed on one side of the annular rotating disk (4661); a limiting column (4663) matching the groove wheel (4662) is fixed on one side of the bottom of the annular rotating disk (4661); a second vertical shaft (4664) penetrating the top of the drying outer barrel (1) and rotating with the second vertical shaft (4664) via a bearing is fixedly disposed at the axis of the groove wheel (4662); and a transmission belt (4665) is disposed between the second vertical shaft (4664) and the first vertical shaft (465) via a pulley transmission. The rotating assembly (47) comprises a connecting circular plate (471) arranged at the top of the supporting vertical tube (41), and the connecting circular plate (471) is fixed to a connecting vertical rod (45) located on the top annular filter (44), and a connecting vertical shaft (472) fixedly arranged at the top of the connecting circular plate (471), and the top of the connecting vertical shaft (472) passes through the supporting circular plate (43) and is rotatably connected to the inner top wall of the drying outer barrel (1) through a bearing, a driven gear (473) is fixed to the top of the connecting vertical shaft (472), and a connecting circular ring (474) fixed to the annular rotating disk (4661) is fixed to the bottom of the driven gear (473), a servo motor (475) is fixedly installed on one side of the top of the drying outer barrel (1), a transmission vertical shaft that passes through the top of the drying outer barrel (1) and rotates with the drying outer barrel (1) through a bearing is fixedly arranged on the output shaft of the servo motor (475), and a driving gear (476) meshing with the driven gear (473) is fixedly arranged on the transmission vertical shaft.

2. A drying device for preparing high-purity ammonium rhenate according to claim 1, characterized in that: The unloading assembly (48) comprises a plurality of discharge troughs (481) arranged at the bottom of the annular filter (44) and opened on the drying inner barrel (2) and distributed in a circumferential array; annular baffles (482) respectively matching the three annular filter screens (44) are slidably arranged on the drying inner barrel (2); arc-shaped baffles sliding with the plurality of discharge troughs (481) are respectively fixed to the inner side walls of the annular baffles (482); a plurality of equidistantly arranged connecting rods (483) are fixed between two adjacent annular baffles (482); and an annular frame (484) sliding with the drying outer barrel (1) is fixed to the annular baffle (482) at the top.

3. A drying device for preparing high-purity ammonium rhenate according to claim 2, characterized in that: Driving members (485) are respectively provided at both ends of the bottom of the annular frame (484) to drive the annular baffle (482) to move and to be fixed to the drying outer barrel (1). A protective cover fixed to the drying outer barrel (1) is provided on the outside of the driving member (485).

4. A drying device for preparing high-purity ammonium rhenate according to claim 1, characterized in that: The feeding mechanism (5) comprises a feeding hopper (51) arranged at the top of the drying outer barrel (1), and four feeding pipes (52) arranged in a circumferential array and fixedly connected to the bottom of the feeding hopper (51). The bottom of the feeding pipe (52) penetrates the top of the drying outer barrel (1) and extends to be fixedly connected to the supporting circular plate (43). A limiting circular plate (53) is fixed on the inner side of the feeding hopper (51). A movable circular plate (54) is arranged on the limiting circular plate (53) to rotate with the feeding hopper (51). A rotating vertical shaft (57) is fixed at the bottom of the movable circular plate (54). The bottom of the rotating vertical shaft (57) penetrates the limiting circular plate (53) and the feeding pipe (52) and is rotatably connected to the outer top wall of the drying outer barrel (1) via a bearing. A transmission belt (58) is arranged between the bottom of the rotating vertical shaft (57) and the top of the second vertical shaft (4664) via a pulley.

5. A drying device for preparing high-purity ammonium rhenate according to claim 4, characterized in that: The movable circular plate (54) is provided with two symmetrically arranged feed holes 1 (55), and the limiting circular plate (53) is provided with feed holes 2 (56) respectively matched with the four feed pipes (52), and the two feed holes 1 (55) are matched with the two opposite feed holes 2 (56) respectively.

6. A drying device for preparing high-purity ammonium rhenate according to claim 1, characterized in that: A constant temperature hot air blower (7) is fixedly mounted on the drying outer barrel (1), and an air inlet pipe (8) penetrating the drying outer barrel (1), the water outlet funnel (6) and the supporting vertical pipe (41) is fixedly mounted on the output end of the constant temperature hot air blower (7).

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