Air inlet structure of fluidized drying granulator, main stock bin and fluidized drying granulator

Abstract

The utility model provides an air inlet structure of a fluidized drying granulator, a main bin and the fluidized drying granulator, and relates to the field of medicine particle preparation. The air inlet structure of the fluidized drying granulator comprises a bottom plate arranged at the bottom of a drying chamber of the fluidized drying granulator, the bottom plate is provided with an extending air inlet, and the side wall of the air inlet is provided with a plurality of flow guide holes; one surface of the cover body protrudes in a conical shape, and the other surface of the cover body sinks inwards; the cover body is mounted on the air inlet of the bottom plate; when the cover body is installed on the air inlet, the first inner side face of the air inlet, the flow guide hole, the first outer side face of the air inlet and the second inner side face of the cover body jointly form an airflow channel in the air inlet structure. The distance between the bottom end of the side wall of the air inlet and the periphery of the bottom plate is smaller than that between the flow guide holes and the periphery of the bottom plate, so that an opening of one end, communicated with the drying chamber, of the airflow channel faces the bottom of the drying chamber; according to the utility model, medicine particle leakage of the granulator can be reduced, and raw material waste is reduced.

Description

Technical Field

[0001] This utility model relates to the field of drug particle preparation, specifically to an air inlet structure, main material bin, and fluidized bed dryer granulator. Background Technology

[0002] Fluidized bed granulators are widely used drying and granulation equipment in industries such as chemical, pharmaceutical, and food processing. Their working principle involves using airflow to suspend and move material particles within the drying chamber, similar to a boiling state, thus achieving efficient and uniform drying. The core advantages of this equipment lie in its high drying speed and uniformity, enabling drying to be completed in a short time with relatively low energy consumption. The main components of a fluidized bed granulator include the drying chamber, airflow system, material feeding system, dehumidification system, and control system. The drying chamber is typically designed as a cylinder or cone to ensure uniform airflow distribution. The airflow system includes a fan and heating device to provide hot air and maintain airflow velocity. The material feeding system ensures that material is evenly fed into the drying chamber, while the dehumidification system is responsible for removing moisture from the drying chamber. The control system monitors and adjusts various parameters during the drying process, such as temperature, humidity, and airflow velocity, to achieve precise control.

[0003] In a fluidized bed dryer granulator, the airflow system needs to be connected to the bottom of the drying chamber to introduce hot air. However, the bottom of the drying chamber is usually also used to collect the dried drug particles. Therefore, in the prior art, when the airflow system stops after drying, the air inlet or air vent at the bottom of the drying chamber is prone to leaking drug particles. This not only wastes raw materials but also easily leads to blockage of the air inlet channel. Utility Model Content

[0004] This invention addresses the problem in existing fluidized bed dryer granulators where drug particles easily leak from the air inlet or vent at the bottom of the drying chamber when the airflow system stops after drying, resulting in raw material waste and blockage of the air intake channel. It provides an air intake structure, main material bin, and fluidized bed dryer granulator that can prevent drug particle leakage from the air inlet or vent at the bottom of the drying chamber and simultaneously change the air circulation direction within the drying chamber.

[0005] The technical solution adopted in this utility model is:

[0006] An air inlet structure for a fluidized bed dryer granulator, comprising:

[0007] A base plate is installed at the bottom of the drying chamber of the fluidized bed dryer granulator. The base plate has an extended air inlet, and the side wall of the air inlet has several guide holes.

[0008] The cover has one side that protrudes in a conical shape and the other side that is recessed inward; the cover is installed on the air inlet of the base plate;

[0009] When the cover is installed on the air inlet, the first inner side of the air inlet, the guide hole, the first outer side of the air inlet, and the second inner side of the cover together form an airflow channel within the air inlet structure; and the distance between the bottom end of the side wall of the air inlet and the outer periphery of the base plate is less than the distance between the guide holes and the outer periphery of the base plate, so that the opening of the airflow channel connecting one end of the drying chamber faces the bottom of the drying chamber.

[0010] Furthermore, the first inner side of the air inlet gradually slopes inward from bottom to top, so that the diameter of the air inlet gradually decreases from bottom to top.

[0011] Furthermore, the first outer side of the air inlet gradually slopes outward from top to bottom, and the second inner side of the concave portion of the cover gradually slopes outward from top to bottom, causing the airflow channel to gradually expand outward from top to bottom.

[0012] Furthermore, the first inner side surface, the first outer side surface of the base plate, and the second inner side surface of the cover are all curved surfaces.

[0013] Furthermore, the recessed portion of the cover is provided with a stepped portion; the stepped portion can be fixed by cooperating with the angle between the first top surface and the first inner side surface of the air inlet.

[0014] Furthermore, the second top surface and the second outer surface of the cover are made of a smooth rubber material.

[0015] A main feed hopper for a fluidized bed dryer granulator includes:

[0016] The air inlet structure of the fluidized bed dryer granulator as described above; and

[0017] The hopper sidewall is located above the air inlet structure of the fluidized bed dryer granulator.

[0018] Furthermore, the sidewall of the hopper is gradually inclined outward from bottom to top, and the connection between the sidewall of the hopper and the bottom plate is provided with an arc transition.

[0019] A fluidized bed dryer granulator, comprising:

[0020] The main material silo has the air inlet structure of the fluidized bed dryer granulator as described above;

[0021] The bottom cylinder is located below the main material bin and is connected to the main material bin;

[0022] A mixing bin is located above and connected to the main material bin;

[0023] A filter chamber is located above the mixing chamber. The filter chamber contains a filter assembly and is connected to an air extraction pipe.

[0024] Furthermore, the connection between the filter chamber and the mixing chamber is located at the center of the bottom surface of the filter chamber.

[0025] The beneficial effects of this utility model are:

[0026] 1. The air inlet structure of the fluidized bed dryer of this utility model, by setting an air inlet on the bottom plate and working together with the cover, can change the direction of the blown hot air flow. The air inlet structure connects the opening at one end of the drying chamber to the bottom of the drying chamber, making it difficult for solid materials to pass through. This avoids the accumulation of drug powder at the bottom of the drying chamber before the granulator starts running and the leakage of drug particles collected at the bottom of the drying chamber after the operation. It solves the problem in the prior art that drug particles are easily leaked from the air inlet or air hole at the bottom of the drying chamber when the airflow system stops after drying, resulting in raw material waste and blockage of the air inlet channel.

[0027] 2. The main material bin of the fluidized bed dryer of this utility model, by setting the above-mentioned air inlet structure, makes it less likely for drug powder stored at the bottom of the drying chamber before the granulator runs and for drug particles collected at the bottom of the drying chamber after the operation to leak. This solves the problem in the prior art that drug particles are easily leaked from the air inlet or air hole at the bottom of the drying chamber when the airflow system stops after drying, resulting in raw material waste and blockage of the air inlet channel.

[0028] 3. The fluidized bed dryer of this invention, by setting the above-mentioned air inlet structure, makes it less likely for drug master powder stored at the bottom of the drying chamber before the granulator runs and for drug particles collected at the bottom of the drying chamber after the operation to leak. This solves the problem in the prior art that drug particles are easily leaked from the air inlet or air hole at the bottom of the drying chamber when the airflow system stops after drying, resulting in raw material waste and blockage of the air inlet channel. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a three-dimensional schematic diagram of the air intake structure according to an embodiment of the present utility model;

[0031] Figure 2This is a three-dimensional schematic diagram of the base plate according to an embodiment of the present utility model;

[0032] Figure 3 This is a partial sectional view of the base plate of an embodiment of the present utility model;

[0033] Figure 4 This is a partial cross-sectional view of the cover body according to an embodiment of the present utility model;

[0034] Figure 5 This is a schematic diagram of the gas flow direction in an embodiment of the present invention;

[0035] Figure 6 This is a three-dimensional schematic diagram of the main material bin according to an embodiment of the present utility model;

[0036] Figure 7 This is a schematic diagram of the internal structure of the main material bin in an embodiment of the present utility model;

[0037] Figure 8 This is an exploded view of the granulator according to an embodiment of the present invention;

[0038] Figure 9 This is a schematic diagram of the internal structure of the granulator according to an embodiment of the present invention;

[0039] Figure 10 for Figure 8 A magnified view of point A in the middle.

[0040] Reference numerals: 100-Main hopper, 110-Bottom plate, 120-Air inlet, 121-First inner side surface, 122-First top surface, 123-First outer side surface, 124-Guide hole, 130-Cover, 131-Inner top surface, 132-Step, 133-Second inner side surface, 134-Second outer side surface, 135-Second top surface, 140-Side wall of hopper, 142-Outer flange, 143-Positioning hole;

[0041] 200 - Mixing chamber, 210 - Feed pipe, 220 - Nozzle, 230 - Positioning pin;

[0042] 300 - Bottom cylinder, 310 - Air inlet pipe, 320 - Air outlet;

[0043] 400 - Filter chamber, 410 - Connecting port, 420 - Air extraction pipe, 430 - Filter assembly. Detailed Implementation

[0044] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0045] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.

[0046] The embodiments of the utility model will now be described in detail with reference to the accompanying drawings.

[0047] Example 1

[0048] In existing fluidized bed dryer granulators, when the airflow system stops after drying, drug particles are prone to leak from the air inlet or air vent at the bottom of the drying chamber. This not only wastes raw materials but also easily leads to blockage of the air intake channel. This is mainly because the air inlet or air vent of the airflow system generally needs to be located at the bottom to spray hot air in order to keep the material particles in the drying chamber in a suspended and moving state. At the same time, the bottom of the drying chamber usually needs to store drug master powder before production and store the prepared and dried drug particles after production.

[0049] This embodiment provides an air inlet structure for a fluidized bed dryer granulator, used to introduce hot air into the drying chamber for drying and granulation. This air inlet structure prevents drug particles from leaking from the air inlet or vent at the bottom of the drying chamber, and also changes the air circulation direction within the drying chamber, reducing the adhesion of drug particles and powder to the filtration equipment. Please refer to [link to relevant documentation]. Figures 1-5 The air inlet structure of this fluidized bed dryer mainly includes: a bottom plate 110 and a cover 130, etc.

[0050] The base plate 110 is located at the bottom of the drying chamber of the fluidized bed granulator. It serves as both the hot air inlet for the airflow system and the bottom of the container for storing the drug masterbatch before production and for storing the prepared and dried drug granules after production. For example... Figure 2 , Figure 3As shown, the base plate 110 is roughly annular in shape on the outside, with an opening in the middle that bulges upward to form an air inlet 120. The air inlet 120 has a roughly annular cross-section when viewed from above. The first inner side 121 of the air inlet 120 gradually slopes inward from bottom to top, causing the diameter of the air inlet 120 to gradually decrease from bottom to top, thus converging the incoming hot air towards the center. Furthermore, the first inner side 121 is provided with several guide holes 124 that connect to the first outer side 123, connecting the inner and outer spaces of the air inlet 120. The guide holes 124 are roughly rectangular with rounded corners, located near the top of the first inner side 121, and evenly distributed around the circumference of the first inner side 121, ensuring uniform airflow in all directions within the drying chamber. Meanwhile, the first top surface 122 of the air inlet 120 is parallel to the outer peripheral plate-like portion of the base plate 110, and is used to connect with the upper cover 130; the first outer side surface 123 of the air inlet 120 gradually slopes outward from top to bottom, so that the outer diameter of the air inlet 120 gradually increases from top to bottom, thereby dispersing the hot air flowing towards the center to the surrounding areas. In addition, in this embodiment, the first inner side surface 121 and the first outer side surface 123 are both curved surfaces while being sloped, so as to make the airflow of hot air smoother and reduce energy loss during the flow process.

[0051] The cover 130 is positioned above the base plate 110, serving to form an airflow channel for the air intake structure together with the base plate 110, and also guiding the material inside the drying chamber towards the surrounding air outlets. Figure 1 , Figure 4As shown, the cover 130 is generally circular with its bottom recessed inwards, designed to fit over the top of the air inlet 120 of the base plate 110. The inner top surface 131 of the recessed portion of the cover 130 is parallel to the outer surface of the base plate 110. The second inner side surface 133 of the recessed portion of the cover 130 gradually slopes outwards from top to bottom, allowing the hot air blown out of the guide hole 124 to diffuse in all directions. The cross-section of the second inner side surface 133 in the main viewing direction is also arc-shaped to facilitate smoother airflow and reduce energy loss during the flow process. Simultaneously, a stepped portion 132 is provided in the recessed portion of the cover 130 at the connection between the inner top surface 131 and the second inner side surface 133, used to fix the cover 130 in place by matching the angle between the first top surface 122 and the first inner side surface 121 at the top of the air inlet 120. On the outer side of the cover 130, the upper second top surface 135 gradually slopes outward from top to bottom, forming a cone shape, causing the material falling onto the cover 130 from the center of the drying chamber to slide around so that it can be blown up again by hot air; the lower outer second outer surface 134 also gradually slopes outward from top to bottom, and the second outer surface 134 is also designed as a curved surface, so that the sliding material can pass smoothly. During installation, the first inner surface 121 of the air inlet 120 forms the first section of hot air channel, which converges from bottom to top towards the center; the guide hole 124 forms the second section of hot air channel, which disperses from the center to the surrounding area; the first outer surface 123 of the air inlet 120 and the second inner surface 133 of the cover 130 form the third section of hot air channel, which diffuses from top to bottom to the surrounding area. The three sections together form a complete airflow channel within the air inlet structure. Furthermore, the bottom of the side wall of the cover 130 is lower than the bottom of the guide hole 124, so that the incoming hot air is turned into blowing downward into the drying chamber. The airflow channel of the air inlet structure is connected to the opening at one end of the drying chamber, that is, the bottom of the third channel faces the bottom of the drying chamber, making it difficult for solid materials to pass through.

[0052] One specific working method of this embodiment is as follows:

[0053] First, store the drug master powder at the bottom of the drying chamber; after sealing the drying chamber, start the fluidized bed dryer and granulator, spraying wet raw material slurry from the side of the drying chamber while introducing hot air from the air inlet structure at the bottom of the drying chamber; after a certain period of time, stop spraying slurry and continue ventilation and drying; continue running until all the drug particles in the drying chamber are dry, then stop ventilation and drying, collect the drug particles at the bottom of the drying chamber and take them out.

[0054] In summary, in this embodiment, the air inlet structure of the fluidized bed dryer, through the air inlet 120 on the base plate 110, together with the cover 130, constructs an airflow channel that can change the direction of the blown-in hot air. This allows the airflow channel of the air inlet structure to connect to the opening at one end of the drying chamber, which faces the bottom of the drying chamber, making it difficult for solid materials to pass through. This avoids the accumulation of drug powder at the bottom of the drying chamber before the granulator starts operating, and prevents leakage of drug particles collected at the bottom of the drying chamber after operation. This solves the problem in the prior art where drug particles easily leak from the air inlet or air vent at the bottom of the drying chamber when the airflow system stops after drying, resulting in raw material waste and blockage of the air inlet channel.

[0055] Meanwhile, in this embodiment, by setting several guide holes 124 on the side wall of the air inlet 120, and in conjunction with the cover 130, the space where hot air is directly blown in is changed to the outer periphery of the drying chamber. The middle part of the drying chamber is not directly affected by the hot air. The material falls, and the falling material returns to the outer periphery through the conical second top surface 135 of the cover 130, and continues to be blown upward by the hot air. In this process, from a top view, the area of ​​the material in the rising state in the drying chamber of this embodiment is reduced compared with the drying chamber of the prior art. Among the rising material, drug particles and drug powder are more likely to adhere to the filter bag of the filter equipment above. Therefore, the air inlet structure of the fluidized bed dryer granulator in this embodiment also helps to reduce the contact of the filter equipment with the attached drug particles and drug powder, and avoids the drug particles and drug powder from forming blockages in the filter equipment and its pipes, so that the dehumidification and exhaust system of the granulator can operate more stably.

[0056] Preferably, in this embodiment, the second top surface 135 and the second outer surface 134 of the cover 130 can be made of a smooth rubber material, such as ethylene propylene diene monomer (EPDM), which is conducive to the sliding of the material above and can also reduce the impact on the falling drug particles.

[0057] Example 2

[0058] The second embodiment, based on the above embodiments, further provides a main material hopper for a fluidized bed dryer granulator that utilizes this air inlet structure.

[0059] Please see Figures 6-7 In the second embodiment, the main feed hopper of the fluidized bed dryer is set at the bottom of the drying chamber of the fluidized bed dryer. It serves as part of the drying chamber and can also be separated from the upper part of the drying chamber before and after use, thereby facilitating the pouring of drug master powder before the granulator is run and the removal of drug particles from the bottom of the drying chamber after the granulator is run.

[0060] like Figure 6 , Figure 7As shown, the main hopper of the fluidized bed dryer in this embodiment mainly includes an air inlet structure at the bottom, the same as in the previous embodiment, and a hopper side wall 140 above the air inlet structure. The hopper side wall 140 is gradually inclined outwards from bottom to top, and a curved transition is provided at the connection between the hopper side wall 140 and the bottom plate 110, so that the hopper side wall 140 can cooperate to guide the upward-directed hot air distribution on the outer periphery of the drying chamber. Simultaneously, an outer flange 142 is provided at the top of the hopper side wall 140 for connecting with the upper part of the drying chamber above.

[0061] In this embodiment, the main feed hopper of the fluidized bed dryer, by setting the aforementioned air inlet structure, prevents leakage of drug masterbatch powder stored at the bottom of the drying chamber before the granulator starts operating, and drug particles collected at the bottom of the drying chamber after operation. This solves the problem in the prior art where drug particles easily leak from the air inlet or air vent at the bottom of the drying chamber when the airflow system stops after drying, resulting in raw material waste and blockage of the air inlet channel. Furthermore, the air inlet structure, combined with the inclined hopper sidewall 140, forms a new hot air flow direction, which helps reduce the contact between the filter equipment and the attached drug particles and powder, preventing blockage of the filter equipment and its pipes, and allowing the granulator's dehumidification and exhaust system to operate more stably.

[0062] Example 3

[0063] The third embodiment, based on the above embodiments, further provides a fluidized bed dryer granulator that applies this air inlet structure.

[0064] Please see Figures 8-10 The fluidized bed dryer in the third embodiment mainly includes: a drying chamber composed of the main material bin 100 and the mixing bin 200 in the above embodiment, as well as a filter chamber 400 above the drying chamber and a bottom cylinder 300 below the drying chamber.

[0065] like Figure 8 , Figure 9As shown, a mixing chamber 200 is positioned above the main material chamber 100, and the two are internally connected to form a drying chamber. A feed pipe 210 is installed on the side wall of the mixing chamber 200, with one end connected to a nozzle 220 located inside the mixing chamber 200 for introducing wet raw material slurry for uniform spray granulation. Multiple positioning pins 230 are located at the bottom of the mixing chamber 200, and multiple positioning holes 143 are provided on the outer flange 142 of the main material chamber 100. The multiple positioning pins 230 and positioning holes 143 are used to position the mixing chamber 200 and the main material chamber 100. A filter chamber 400 is positioned above and connected to the mixing chamber 200. The filter chamber 400 contains a filter assembly 430 composed of multiple filter bags, and two exhaust pipes 420 are connected to its top. The filter chamber 400 is used to filter the extracted moisture, preventing drug particles or powder from being extracted. Meanwhile, the bottom cylinder 300 is located below the main material hopper 100, and the air outlet 320 above the bottom cylinder 300 is connected to the bottom of the main material hopper 100, connecting to the air inlet 120 of the main material hopper 100. The air inlet pipe 310 of the bottom cylinder 300 is located on its side wall for connecting to the airflow system. In use, the mixing chamber 200, the bottom cylinder 300, and the filter chamber 400 are fixedly installed. The main material hopper 100 is installed and separated by being fed in and out by a trolley, which facilitates the addition of drug masterbatch before the granulator starts running and the removal of drug granules from the bottom of the drying chamber after the granulator starts running.

[0066] In this embodiment, the fluidized bed dryer granulator, by setting the above-mentioned air inlet structure, makes it less likely for drug master powder stored at the bottom of the drying chamber before the granulator starts running, and for drug particles collected at the bottom of the drying chamber after the operation to leak. This solves the problem in the prior art that drug particles are easily leaked from the air inlet or air hole at the bottom of the drying chamber when the airflow system stops after drying, resulting in raw material waste and blockage of the air inlet channel.

[0067] In addition, in this embodiment, the connection port 410 between the filter chamber 400 and the mixing chamber 200 is located at the center of its bottom surface, thereby further utilizing the upward airflow direction in the drying chamber to reduce the adhesion of drug particles and drug powder to the filter bag inside the filter chamber 400.

[0068] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An air inlet structure for a fluidized bed dryer granulator, characterized in that, Include: A base plate (110) is disposed at the bottom of the drying chamber of the fluidized bed dryer granulator. The base plate (110) is provided with an extended air inlet (120), and a plurality of guide holes (124) are provided on the side wall of the air inlet (120); and The cover (130) has one side that is conical and protruding, and the other side that is concave inward; the cover (130) is installed on the air inlet (120) of the base plate (110); When the cover (130) is installed on the air inlet (120), the first inner side (121) of the air inlet (120), the guide hole (124), the first outer side (123) of the air inlet (120) and the second inner side (133) of the cover (130) together form the airflow channel in the air inlet structure; and the distance between the bottom end of the side wall of the air inlet (120) and the outer periphery of the base plate (110) is less than the distance between the guide holes (124) and the outer periphery of the base plate (110), so that the opening of the airflow channel connecting one end of the drying chamber faces the bottom of the drying chamber.

2. The air inlet structure of the fluidized bed dryer granulator as described in claim 1, characterized in that, The first inner side (121) of the air inlet (120) gradually slopes inward from bottom to top, so that the diameter of the air inlet (120) gradually decreases from bottom to top.

3. The air inlet structure of the fluidized bed dryer granulator as described in claim 1, characterized in that, The first outer side (123) of the air inlet (120) gradually slopes outward from top to bottom, and the second inner side (133) of the concave portion of the cover (130) gradually slopes outward from top to bottom, so that the airflow channel gradually expands outward from top to bottom.

4. The air inlet structure of the fluidized bed dryer granulator as described in claim 1, characterized in that, The first inner side (121), the first outer side (123) of the base plate (110), and the second inner side (133) of the cover (130) are all curved surfaces.

5. The air inlet structure of the fluidized bed dryer granulator as described in claim 1, characterized in that, The recessed portion of the cover (130) is provided with a step (132); the step (132) can be fixed by cooperating with the angle between the first top surface (122) and the first inner side surface (121) of the air inlet (120).

6. The air inlet structure of the fluidized bed dryer granulator as described in claim 1, characterized in that, The second top surface (135) and the second outer surface (134) of the cover (130) are made of a smooth rubber material.

7. A main feed hopper for a fluidized bed dryer granulator, characterized in that, Include: The air inlet structure of the fluidized bed dryer granulator as described in any one of claims 1-6; and The hopper sidewall (140) is located above the air inlet structure of the fluidized bed dryer granulator.

8. The main material silo of the fluidized bed dryer granulator as described in claim 7, characterized in that, The side wall (140) of the silo is gradually inclined outward from bottom to top, and the connection between the side wall (140) of the silo and the bottom plate (110) is provided with an arc transition.

9. A fluidized bed dryer / granulator, characterized in that, Include; The main material silo (100) has the air inlet structure of the fluidized bed dryer granulator as described in any one of claims 1-6; The bottom cylinder (300) is located below the main material bin (100) and is connected to the main material bin (100); A mixing bin (200) is disposed above the main material bin (100) and is connected to the main material bin (100); A filter chamber (400) is disposed above the mixing chamber (200). The filter chamber (400) is equipped with a filter assembly (430) and is connected to an air extraction pipe (420).

10. The fluidized bed dryer and granulator as described in claim 9, characterized in that, The connection port (410) between the filter chamber (400) and the mixing chamber (200) is located at the center of the bottom surface of the filter chamber (400).

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