Fluidized bed drying granulator and method

Abstract

The present invention belongs to the technical field of granulation, and discloses a fluidized bed drying granulator and method, including an air inlet bin, a material bin, a spray bin and a filter bin connected in sequence, a first rotating source is installed on the outer wall of the spray bin, a rotating ring is rotatably connected on the inner wall of the spray bin, the first rotating source can drive the rotating ring to rotate through a transmission mechanism, a first connecting plate is fixedly connected to the bottom wall of the rotating ring, the first connecting plate abuts against the inner wall of the spray bin, a second connecting plate is hinged at the bottom of the first connecting plate, one end of the second connecting plate is fixedly connected to a stirring frame, and the top of the stirring frame is arranged near the spray gun; the interior of the rotating ring, the first connecting plate, the second connecting plate and the stirring frame are all hollow, the first connecting plate, the second connecting plate and the stirring frame are all provided with air outlet holes, and an adjusting mechanism for driving the second connecting plate is arranged in the spray bin. The present invention has the effect of improving the cleanliness of the device and the utilization rate of materials.

Description

Technical Field

[0001] The invention relates to the technical field of granulation, and in particular to a boiling drying granulator and a method. Background Art

[0002] Fluidized bed drying granulator is a kind of equipment used in pharmaceutical, chemical, food and other industries. When using fluidized bed drying granulator, powdered materials are put into the closed container of hopper. Due to the effect of hot air flow, powder is suspended and circulated in fluidized state to achieve uniform mixing. At the same time, mist binder is sprayed into the container to moisten the powder and condense the powder into loose small particles. At the same time, due to the efficient drying of hot air flow, water evaporates continuously and powder solidifies continuously. The process is repeated to form ideal and uniform multi-porous spherical particles.

[0003] Reference is made to the Chinese patent application document with publication number CN115069165A, which discloses a boiling drying granulator with a self-cleaning function, which includes a cleaning mechanism arranged inside a mixing box, which can clean the inner wall of the mixing box during the operation of the boiling drying granulator body, and a transmission mechanism is arranged in the exhaust box, which can drive the cleaning mechanism to clean the inside of the mixing box under the drive of a driving plate, thereby cleaning the inner wall of the mixing box of the boiling drying granulator.

[0004] With regard to the above-mentioned related technologies, during the granulation process, the boiling powder particles will condense with the liquid material at the nozzle and stick to the nozzle, resulting in the liquid material sprayed from the nozzle not forming a mist spray but a linear spray, which easily increases the wetness of the material and causes the material to stick to the inner wall of the granulator. The material stuck to the inner wall cannot participate in the granulation process normally, resulting in uneven composition of the obtained granules, affecting product quality and causing waste of raw materials. Summary of the invention

[0005] In view of this, the present invention provides a boiling drying granulator and method, aiming to solve the problem that after the nozzle of the spray gun contacts the material, the material adheres to the inner wall and affects the quality of the medicine.

[0006] To solve the above technical problems, in the first aspect, the present invention provides a boiling drying granulator, comprising a frame, on which an air intake bin, a silo, a spray bin and a filter bin connected in sequence from bottom to top are arranged, a spray gun is arranged in the spray bin, and an exhaust pipe is connected to one side of the filter bin, a first rotating source is installed on the outer wall of the spray bin, a rotating ring is rotatably connected to the inner wall of the spray bin, the first rotating source can drive the rotating ring to rotate through a transmission mechanism, a first connecting plate abutting against the inner wall of the spray bin is fixedly connected to the bottom wall of the rotating ring, a second connecting plate abutting against the inner wall of the silo is hingedly connected to the bottom of the first connecting plate, a stirring frame is fixedly connected to one end of the second connecting plate away from the first connecting plate, and the top of the stirring frame is arranged close to the spray gun; the interiors of the rotating ring, the first connecting plate, the second connecting plate and the stirring frame are all hollow, air outlet holes are opened on the first connecting plate, and an adjusting mechanism driving the second connecting plate is arranged in the spray bin.

[0007] By adopting the above technical scheme, the setting of the air circuit can clean the nozzle of the spray gun before and after the material is granulated, thereby improving the cleanliness of the spray gun nozzle so that the spray gun can spray evenly during the next granulation operation; during the granulation operation, the second connecting plate can be rotated and abutted against the inner wall of the silo through the adjustment mechanism, so that the inner wall of the silo can also be cleaned, and at the same time, the stirring rack can also stir the material at a low speed. The setting of the air outlet on the stirring rack can assist in blowing the material to reduce the influence of the stirring rack blocking the airflow. The air outlet on the first connecting plate and the second connecting plate can clean the first connecting plate and the second connecting plate, which is beneficial to the granulation of the material and ensures the quality of the finished product.

[0008] Optionally, the transmission mechanism includes a fixed shell, a first bevel gear, a second bevel gear, a first connecting rod, a friction wheel and a ball. The fixed shell is fixedly connected to the inner wall of the spray bin, the first bevel gear, the second bevel gear, the first connecting rod and the friction wheel are all arranged inside the fixed shell, the first bevel gear is connected to the driving shaft of the first rotation source, the second bevel gear is meshed with the first bevel gear, the first connecting rod is fixedly connected to the center of the second bevel gear and extends in a vertical direction, the friction wheel is fixedly sleeved on the lower part of the first connecting rod and abuts against the rotating ring, the rotating ring is arranged through the fixed shell, and the ball is rotatably connected to the side wall of the fixed shell close to the rotating ring.

[0009] By adopting the above technical solution, when the rotating ring needs to rotate, the first bevel gear rotates under the drive of the first rotation source, and then the first bevel gear drives the second bevel gear to rotate. The second bevel gear can drive the friction wheel to start rotating through the first connecting rod. As the friction wheel rotates, the friction wheel drives the rotating ring to rotate at a low speed under the action of the ball, so as to clean the inner wall of the spray bin.

[0010] Optionally, the adjusting mechanism includes a second connecting rod, a solenoid valve, a piston cylinder, a piston rod, a return spring, a third connecting rod and a fourth connecting rod, the second connecting rod is fixedly connected to the side wall of the first connecting plate, the piston cylinder is ball-jointed to the second connecting rod, the piston rod is slidably connected in the piston cylinder, one end of the third connecting rod is hinged to the end of the piston rod, and the other end is hinged to the first connecting plate, and one end of the fourth connecting rod is hinged to the end of the piston rod, and the other end is hinged to the second connecting plate.

[0011] By adopting the above technical solution, when the inner wall of the silo needs to be cleaned, the airflow can enter from the second connecting rod by opening the solenoid valve, and the third connecting rod is driven to rotate under the action of the airflow, and then the third connecting rod drives the second connecting plate to rotate, so that the second connecting plate can clean the inner wall of the silo.

[0012] Optionally, a first linear drive is provided above the air intake bin, and the driving shaft of the first linear drive is connected to a lifting ring that can move vertically. A movable frame is provided below the silo, and the spraying bin is hinged on the frame and can move vertically. When the lifting ring moves upward, it can drive the silo and the spraying bin to move upward, and connect the silo, the spraying bin and the filter bin.

[0013] By adopting the above technical solution, when it is necessary to connect the material bin, the spraying bin and the filtering bin, the material bin with the material loaded is pushed to the bottom of the spraying bin, and the lifting ring is driven to move upward by the first linear drive. During the upward movement of the lifting ring, the spraying bin and the filtering bin can be pushed to connect, and the material bin and the spraying bin are connected under the action of the lifting ring.

[0014] Optionally, a second linear actuator is fixedly installed on the top of the filter bin, a driving shaft of the second linear actuator is connected to a connecting frame, and a dust removal bag is fixedly connected to the bottom of the connecting frame.

[0015] By adopting the above technical solution, during the granulation work, part of the material will enter the dust bag upwards, and after being filtered by the dust bag, part of the material will adhere to the dust bag. The second linear drive can drive the dust bag to roll up and down, thereby throwing off the adhered material, so that the material can continue to be granulated and reduce material waste.

[0016] Optionally, a cleaning block is fixedly connected to the side wall of the fixed shell.

[0017] By adopting the above technical solution, some materials are likely to fall to the top of the rotating ring when moving upwards. The top of the rotating ring can be cleaned by setting the cleaning block, which improves the cleanliness of the device and is beneficial to the utilization of materials.

[0018] Optionally, the side walls of the spray bin, the material bin and the filter bin are all provided with windows.

[0019] By adopting the above technical solution, the setting of the window makes it convenient for the staff to observe the material status during the granulation process, so as to judge whether the operation is normal in time.

[0020] In a second aspect, the present invention provides a fluidized bed drying granulation method, which is applied to a fluidized bed drying granulator in the first aspect, and the method is:

[0021] S1, clean the nozzle of the spray gun through the air outlet on the stirring frame, move the silo to the bottom of the spray silo after loading, and then connect the silo, spray silo and filter silo to achieve sealing;

[0022] S2, hot air is introduced into the air inlet bin, and then air is inflated into the rotating ring to rotate the second connecting plate to abut against the inner wall of the silo, and then the rotating ring is rotated to drive the first connecting plate, the second connecting plate and the stirring frame to rotate, and the inner walls of the silo and the spraying bin are cleaned while granulating;

[0023] S3, after the granulation is completed, the ventilation to the air inlet bin is stopped, and the solenoid valve is closed to rotate the second connecting plate and the stirring frame, and the air outlet hole on the stirring frame cleans the spray gun;

[0024] S4, remove the silo and collect the materials.

[0025] By adopting the above technical solution, the nozzle of the spray gun is cleaned before granulation, the second connecting plate is rotated during granulation, the material is stirred when the spray bin and the inner wall of the silo are cleaned, and after granulation, the second connecting plate and the stirring frame are retracted and the nozzle of the spray gun is blown and cleaned again.

[0026] In summary, compared with the prior art, the present invention includes at least one of the following beneficial technical effects:

[0027] 1. By cleaning the inner wall of the spray bin and the silo, the materials adhering to the inner wall can be cleaned, so as to make the composition of the raw materials uniform and ensure the product quality. At the same time, it can also reduce the waste of raw materials and improve the cleanliness of the device. The nozzle of the spray gun can be cleaned before and after the granulation process, which is conducive to ensuring the normal granulation work;

[0028] 2. While cleaning the inner wall, the first connecting plate and the second connecting plate can also be cleaned to ensure their cleanliness. At the same time, under the action of airflow, the humidity of the material adhering to the inner wall can be reduced, which is beneficial to improve the utilization rate of the material;

[0029] 3. The nozzle of the spray gun can be cleaned before the stirring rod is moved, and the material can be stirred after it is moved to improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0031] Figure 2 It is a schematic diagram of the structure inside the embodiment of the present invention;

[0032] Figure 3 A schematic diagram of the structure of the fixed housing and the cleaning block assembly according to an embodiment of the present invention;

[0033] Figure 4 It is a schematic structural diagram of the assembly of the friction wheel and the rotating ring according to an embodiment of the present invention;

[0034] Figure 5 A schematic diagram of the structure of the assembly of the ball bearing and the fixed housing according to an embodiment of the present invention;

[0035] Figure 6 for Figure 2 A partial enlarged view of the middle area A;

[0036] Figure 7 The figure is a schematic structural diagram of the assembly of the return spring and the piston rod according to an embodiment of the present invention.

[0037] Explanation of reference numerals: 1, frame; 11, air inlet bin; 12, silo; 13, spray bin; 131, spray gun; 132, sealing ring; 14, filter bin; 15, exhaust pipe; 2, first rotation source; 21, rotating ring; 22, first connecting plate; 23, second connecting plate; 24, stirring frame; 241, fifth connecting rod; 242, stirring rod; 25, air outlet; 3, transmission mechanism; 31, fixed shell; 311, dust cover; 32, first bevel gear wheel; 33, second bevel gear; 34, first connecting rod; 35, friction wheel; 36, ball; 4, adjustment mechanism; 41, second connecting rod; 42, solenoid valve; 43, piston cylinder; 44, piston rod; 45, return spring; 46, third connecting rod; 47, fourth connecting rod; 5, first linear drive; 51, lifting ring; 52, moving frame; 6, second linear drive; 61, connecting frame; 62, dust bag; 7, cleaning block; 8, window. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figure 1-Figure 7 , a clear and complete description of the technical solutions of the embodiments of the present invention is given. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0039] In a first aspect, the present invention provides a fluidized bed drying granulator.

[0040] Reference Figure 1 A boiling drying granulator includes a frame 1 and an air intake bin 11, a material bin 12, a spraying bin 13 and a filtering bin 14 connected in sequence. The air intake bin 11 is arranged at the lower part of the frame 1. The bottom of the material bin 12 is connected to a movable frame 52 so that the material bin 12 can be moved for loading and unloading. After loading, the material bin 12 moves to between the air intake bin 11 and the spraying bin 13. The spraying bin 13 is hinged on the frame 1 and can move vertically. The spraying bin 13 is arranged above the material bin 12. A spray gun 131 for spraying a liquid binder is arranged inside the spraying bin 13. The filtering bin 14 is fixedly connected to the frame 1 and is located above the spraying bin 13. Windows 8 are provided on the material bin 12, the spraying bin 13 and the filtering bin 14 for the convenience of observation by the staff. One side of the filtering bin 14 is connected to an exhaust pipe 15 for exhausting gas.

[0041] Reference Figure 2 , Figure 3 , Figure 4 and Figure 5 A first rotating source 2 is fixedly installed on the outer wall of the spraying bin 13. In this embodiment, the first rotating source 2 is a motor. In other embodiments, the first rotating source 2 can be a device whose driving shaft can rotate, such as a hydraulic motor or a rotary cylinder. A sealing ring 132 is fixedly connected to the inner wall of the spraying bin 13. A rotating ring 21 is rotatably connected to the sealing ring 132. The surface of the rotating ring 21 is a smooth surface to reduce material adhesion. The first rotating source 2 can drive the rotating ring 21 to rotate through a transmission mechanism 3. In this embodiment, the transmission mechanism 3 includes a fixed housing 31, a first bevel gear 32, a second bevel gear 33, a first connecting rod 34, a friction wheel 35 and a ball 36. The fixed housing 31 is fixedly connected to the inner wall of the spraying bin 13 and is fixedly connected to the sealing ring 132. The fixed housing 3 A cleaning block 7 for cleaning the top of the rotating ring 21 is fixedly connected to the side wall of 1, the rotating ring 21 is arranged through the fixed shell 31, the first bevel gear 32 is connected to the driving shaft of the first rotation source 2, and a dust cover 311 is fixedly connected to the top of the fixed shell 31. The second bevel gear 33 is rotatably connected in the dust cover 311 and meshes with the first bevel gear 32. The first connecting rod 34 is fixedly connected to the center of the second bevel gear 33. The friction wheel 35 is fixedly sleeved on the lower part of the first connecting rod 34 and abuts against the rotating ring 21. The ball 36 is arranged between the rotating ring 21 and the fixed shell 31 to facilitate the rotation of the rotating ring 21. In other embodiments, the transmission mechanism 3 can also be provided with teeth on the outer side of the rotating ring 21, and then the rotating ring 21 is driven to rotate by rotating the gear.

[0042] Reference Figure 2 , Figure 6 and Figure 7A vertically extending first connecting plate 22 is fixedly connected to the bottom of the rotating ring 21, and the first connecting plate 22 abuts against the inner wall of the spray bin 13. A second connecting plate 23 is hingedly connected to the bottom of the first connecting plate 22. An end of the second connecting plate 23 away from the first connecting plate 22 is connected to a stirring frame 24, and the stirring frame 24 consists of a fifth connecting rod 241 fixedly connected to the second connecting plate 23 and a plurality of stirring rods 242 fixedly connected to the fifth connecting rod 241, and the stirring rod 242 is vertically arranged with the fifth connecting rod 241. The rotating ring 21, the first connecting plate 22, the second connecting plate 23, the fifth connecting rod 241 and the stirring rod 242 are all hollow inside. The first connecting plate 22, the second connecting plate 23 and the stirring rod 242 are all provided with air outlet holes 25. The air vent on the stirring rod 242 away from the second connecting plate 23 is close to the nozzle of the spray gun 131, so as to facilitate cleaning the nozzle of the spray gun 131.

[0043] Reference Figure 4 , Figure 6 and Figure 7 , an adjusting mechanism 4 for driving the second connecting plate 23 to rotate is provided in the spraying bin 13. In this embodiment, the adjusting mechanism 4 includes a second connecting rod 41, a solenoid valve 42, a piston cylinder 43, a piston rod 44, a return spring 45, a third connecting rod 46 and a fourth connecting rod 47. The second connecting rod 41 is hollow inside, and one end of the second connecting rod 41 is connected to the first connecting plate 22, and the other end is connected to the inside of the piston cylinder 43. The second connecting rod 41 is fixedly connected to the upper side wall of the first connecting plate 22, and the solenoid valve 42 is installed on the second connecting rod 41. The second connecting rod 41 can be The inside of the connecting rod 41 is blocked or connected, the piston cylinder 43 is connected to the bottom of the second connecting rod 41 by a ball joint, the piston rod 44 is slidably connected to the inside of the piston cylinder 43, and the bottom of the piston rod 44 extends out of the piston cylinder 43, the third connecting rod 46 is hinged to the side wall at the bottom of the piston rod 44, the fourth connecting rod 47 is hinged to the side wall at the bottom of the piston rod 44 away from the third connecting rod 46, and the end of the fourth connecting rod 47 away from the third connecting rod 46 is hinged to the second connecting plate 23, and the reset spring 45 is sleeved on the piston rod 44 to reset the piston rod 44 after it moves. In other embodiments, the adjustment structure can also be set in a way that the cylinder directly drives the second connecting plate 23 to rotate.

[0044] When the second connecting rod 41 needs to be rotated, the solenoid valve 42 is opened to allow air flow to enter the second connecting rod 41, and then the piston rod 44 moves under the action of the air flow and drives the third connecting rod 46 and the fourth connecting rod 47 to rotate, and then the fourth connecting rod 47 drives the second connecting plate 23 to rotate, so that the second connecting plate 23 abuts against the inner wall of the silo 12, and the fifth connecting rod 241 is in a horizontal state. Driven by the first connecting plate 22, the second connecting plate 23 rotates to clean the inner wall of the silo 12.

[0045] Reference Figure 1 and Figure 2 A second linear actuator 6 is fixedly installed on the top of the filter bin 14. In the present embodiment, the second linear actuator 6 is a motor, and two second linear actuators 6 are provided. In other embodiments, the second linear actuator 6 may also be a device such as a hydraulic motor or a rotary cylinder whose driving shaft can realize rotation. The number may be selected according to actual needs. The driving shaft of each second linear actuator 6 is connected to a connecting frame 61, and a dust bag 62 is fixedly connected to the bottom of the connecting frame 61. Part of the material will rise and enter the dust bag 62. The second linear actuator 6 can realize the vertical movement of the dust bag 62 by driving the connecting frame 61 to move vertically, thereby causing the material to fall and reducing material waste.

[0046] The implementation principle of a drying granulator according to an embodiment of the present invention is as follows: first, airflow is introduced into the rotating ring 21 so that the airflow cleans the nozzle of the spray gun 131, then the material is transported into the silo 12, and then the silo 12 is moved between the spraying silo 13 and the air inlet silo 11, and the first linear actuator 5 is started to drive the lifting ring 51 to move, and the lifting ring 51 moves upward to abut against the spraying silo 13 and push the spraying silo 13 to dock with the filtering silo 14, and then the silo 12 is docked with the air inlet silo 11 under the action of the lifting ring 51, and then the solenoid valve 42 is opened, and the airflow enters. The piston rod 44 is pushed into the second connecting rod 41 and the piston cylinder 43, and the third connecting rod 46 and the fourth connecting rod 47 are driven to rotate, so that the second connecting plate 23 is in contact with the inner wall of the silo 12, and then hot air is introduced into the air inlet bin 11 to start granulation, and then the first rotating source 2 is started to rotate the rotating ring 21, and the rotating ring 21 drives the first connecting plate 22 to rotate to clean the inner wall of the spray bin 13, and the first connecting plate 22 drives the second connecting plate 23 to clean the inner wall of the silo 12, and the stirring frame 24 stirs the material at a low speed.

[0047] After granulation is completed, the solenoid valve 42 is closed, and the piston rod 44 moves upward under the action of the reset spring 45, and then the piston rod 44 drives the third connecting rod 46 and the fourth connecting rod 47 to rotate, thereby driving the second connecting plate 23 and the stirring frame 24 to reset, and then the first linear drive 5 is started to move the lifting ring 51 downward, and then the silo 12 is moved out and the nozzle of the spray gun 131 is blown clean again.

[0048] In a second aspect, the present invention provides a dry granulation method, which is applied to a dry granulator in the first aspect, and the method is:

[0049] S1, clean the nozzle of the spray gun 131 through the air outlet 25 on the stirring frame 24, move the material bin 12 to the bottom of the spray bin 13 after the material is loaded, and then dock the material bin 12, the spray bin 13, and the filter bin 14 to achieve sealing;

[0050] S2, hot air is introduced into the air inlet bin 11, and then air is inflated into the rotating ring 21 to rotate the second connecting plate 23 to abut against the inner wall of the silo 12, and then the rotating ring 21 is rotated to drive the first connecting plate 22, the second connecting plate 23 and the stirring frame 24 to rotate, and the inner walls of the silo 12 and the spraying bin 13 are cleaned while granulating;

[0051] S3, after the granulation is completed, the ventilation to the air inlet bin 11 is stopped, and the solenoid valve 42 is closed to rotate the second connecting plate 23 and the stirring frame 24, and the air outlet 25 on the stirring frame 24 cleans the spray gun 131;

[0052] S4, moving the silo 12 out and collecting the materials.

[0053] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A fluidized bed drying granulator, comprising a frame, on which an air intake bin, a material bin, a spray bin and a filter bin are connected in sequence from bottom to top, a spray gun is provided in the spray bin, and one side of the filter bin is connected to an exhaust pipe, characterized in that: A first rotating source is installed on the outer wall of the spraying bin, and a rotating ring is rotatably connected to the inner wall of the spraying bin. The first rotating source can drive the rotating ring to rotate through a transmission mechanism. A first connecting plate that abuts against the inner wall of the spraying bin is fixedly connected to the bottom wall of the rotating ring. A second connecting plate that abuts against the inner wall of the silo is hingedly connected to the bottom of the first connecting plate. A stirring frame is fixedly connected to one end of the second connecting plate away from the first connecting plate, and the top of the stirring frame is arranged close to the spray gun. The interiors of the rotating ring, the first connecting plate, the second connecting plate and the stirring frame are all hollow, the first connecting plate, the second connecting plate and the stirring frame are all provided with air outlet holes, and an adjustment mechanism for driving the second connecting plate is provided in the spraying chamber; The regulating mechanism includes a second connecting rod, a solenoid valve, a piston cylinder, a piston rod, a return spring, a third connecting rod and a fourth connecting rod, wherein the second connecting rod is fixedly connected to the side wall of the first connecting plate, the piston cylinder is ball-jointed to the second connecting rod, the piston rod is slidably connected in the piston cylinder, one end of the third connecting rod is hinged to the end of the piston rod, and the other end is hinged to the first connecting plate, and one end of the fourth connecting rod is hinged to the end of the piston rod, and the other end is hinged to the second connecting plate; The stirring frame is composed of a fifth connecting rod fixedly connected to the second connecting plate and a plurality of stirring rods fixedly connected to the fifth connecting rod; The second connecting rod is hollow inside, one end of the second connecting rod is connected to the first connecting plate, and the other end of the second connecting rod is connected to the inside of the piston cylinder; The solenoid valve is mounted on the second connecting rod; The bottom of the piston rod extends out of the piston cylinder; The return spring is sleeved on the piston rod to reset the piston rod after it moves; Inflate the rotating ring to rotate the second connecting plate to abut against the inner wall of the silo; When the rotating ring is not inflated, the vent hole on the stirring rod away from the second connecting plate is close to the nozzle of the spray gun.

2. A fluidized bed drying granulator according to claim 1, characterized in that: The transmission mechanism includes a fixed shell, a first bevel gear, a second bevel gear, a first connecting rod, a friction wheel and a ball. The fixed shell is fixedly connected to the inner wall of the spray bin. The first bevel gear, the second bevel gear, the first connecting rod and the friction wheel are all arranged inside the fixed shell. The first bevel gear is connected to the driving shaft of the first rotation source. The second bevel gear is meshed with the first bevel gear. The first connecting rod is fixedly connected to the center of the second bevel gear and extends in a vertical direction. The friction wheel is fixedly sleeved on the lower part of the first connecting rod and abuts against the rotating ring. The rotating ring is arranged through the fixed shell. The ball is rotatably connected to the side wall of the fixed shell close to the rotating ring.

3. A fluidized bed drying granulator according to claim 1, characterized in that: A first linear driver is provided above the air intake bin, and a driving shaft of the first linear driver is connected to a lifting ring that can move vertically. A movable frame is provided below the silo, and the spraying bin is hinged on the frame and can move vertically. When the lifting ring moves upward, it can drive the silo and the spraying bin to move upward, and connect the silo, the spraying bin and the filter bin.

4. A fluidized bed drying granulator according to claim 1, characterized in that: A second linear actuator is fixedly installed on the top of the filter bin, a driving shaft of the second linear actuator is connected to a connecting frame, and a dust removal bag is fixedly connected to the bottom of the connecting frame.

5. A fluidized bed drying granulator according to claim 2, characterized in that: A cleaning block is fixedly connected to the side wall of the fixed shell.

6. A fluidized bed drying granulator according to claim 1, characterized in that: The side walls of the spraying bin, the material bin and the filtering bin are all provided with viewing windows.

7. A fluidized bed drying granulation method, characterized in that: A boiling drying granulator as claimed in claim 3, wherein the method is: S1, clean the nozzle of the spray gun through the air outlet on the stirring frame, move the silo to the bottom of the spray silo after loading, and then connect the silo, spray silo and filter silo to achieve sealing; S2, hot air is introduced into the air inlet bin, and then air is inflated into the rotating ring to rotate the second connecting plate to abut against the inner wall of the silo, and then the rotating ring is rotated to drive the first connecting plate, the second connecting plate and the stirring frame to rotate, and the inner walls of the silo and the spraying bin are cleaned while granulating; S3, after the granulation is completed, the ventilation to the air inlet bin is stopped, and the solenoid valve is closed to rotate the second connecting plate and the stirring frame, and the air outlet hole on the stirring frame cleans the spray gun; S4, remove the silo and collect the materials.

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