A fluidized bed

Abstract

The present application aims to provide a fluidized bed, comprising: a cylinder, a centrifugal fan and a silo; the cylinder is a cylindrical container structure with a closed upper end and an open lower end; a baffle is arranged at the lower end of the cylinder, and the baffle has a first air port and a second air port; wherein the first air port is distributed close to the center of the baffle, and the second air port is distributed along the periphery of the baffle; the cylinder is connected with the upper end of the silo through the baffle; the centrifugal fan is located inside the cylinder and close to the upper end of the cylinder; an exhaust port is provided at the upper end of the cylinder; the lower end of the silo is connected with an air inlet; by using the centrifugal fan as a driving method and then arranging a baffle used in conjunction with the centrifugal fan, an internal and external spiral airflow can be formed in the cylinder, so that the dust can be naturally refluxed under the action of the internal and external spiral airflows, which can overcome the shortcomings of filtering dust removal and cyclone dust removal.

Description

Technical Field

[0001] The present application relates to the field of mechanical technology, and in particular to a fluidized bed. Background Art

[0002] Fluidized bed, also known as fluidized bed, is a device that uses gas to pass through a granular solid layer to put the solid particles in a suspended motion state and carry out gas-solid phase reaction. Fluidized bed is widely used in chemical, pharmaceutical, food, boiler, mining and other fields as the core equipment for drying, chemical reaction, combustion, granulation, coating and other process. During the operation of the fluidized bed, a large amount of dust will be taken away when the gas passes through the solid particle layer. The dust needs to be separated by a filtering separation device, otherwise it will reduce the yield and pollute the environment. There are two main traditional separation methods, one is filtration and the other is cyclone separation.

[0003] There are two main disadvantages of the filtration method. First, the filter material is easily clogged, and vibration, backblowing and other methods are needed to clean the dust accumulated on the filter material; second, the filter material is difficult to clean and replace.

[0004] The cyclone separation method uses a cyclone separator to separate the dust carried away by the air. It has two main disadvantages: first, the separation efficiency is low, resulting in a large amount of fine powder flowing out; second, the dust cannot flow back to the fluidized bed directly, and an additional reflux device is required, which increases equipment investment and reduces work efficiency. Summary of the invention

[0005] In order to solve the above problem, the present application aims to provide a fluidized bed which can realize natural reflux of dust and overcome the shortcomings of filtering dust removal and cyclone dust removal.

[0006] The fluidized bed of the present application includes: a cylinder, centrifugal fan blades and a silo; the cylinder is a cylindrical container structure with a closed upper end and an open lower end; a convergence plate is arranged at the lower end of the cylinder, and the convergence plate has a first air outlet and a second air outlet; wherein the first air outlet is distributed close to the center of the convergence plate, and the second air outlet is distributed along the periphery of the convergence plate; the cylinder is connected with the upper end of the silo through the convergence plate; the centrifugal fan blades are located inside the cylinder and close to the upper end of the cylinder; an exhaust port is opened at the upper end of the cylinder; and the lower end of the silo is connected to an air inlet.

[0007] Furthermore, the fluidized bed also includes: a drive shaft, which passes through the upper end of the cylinder and extends to the interior of the cylinder; and the drive shaft is located on the central axis of the cylinder; the centrifugal fan blades are installed on the drive shaft; and the centrifugal fan blades rotate under the drive of the drive shaft.

[0008] Furthermore, the fluidized bed also includes: a bottom bin, which is arranged between the material bin and the air inlet; one end of the bottom bin is connected to the material bin, and the other end is connected to the air inlet; the external air flow enters the cylinder through the air inlet, the bottom bin, and the material bin in sequence.

[0009] Furthermore, the fluidized bed also includes: a filter screen device with sieve holes, wherein the filter screen device is arranged at the bottom of the silo; and the silo is connected with the bottom silo through the filter screen device.

[0010] Optionally, the convergence plate is circular, and the center of the convergence plate is located on the central axis of the cylinder; a plurality of first air outlets are provided on the convergence plate and are evenly distributed in a circular shape; the radius of the convergence plate is smaller than the radius of the cylinder at the location of the convergence plate, so that a circular second air outlet is formed between the outer periphery of the convergence plate and the cylinder; a plurality of circumferential limit protrusions are extended from the outer periphery of the convergence plate; the plurality of circumferential limit protrusions abut against the inner wall of the cylinder to fix the convergence plate.

[0011] Optionally, the busbar includes: a circular flat plate and a hollow annular flat plate; the annular flat plate and the circular flat plate are arranged correspondingly up and down to form a first annular air outlet; the radius of the annular flat plate is smaller than the radius of the cylinder where the busbar is located, so that a second annular air outlet is formed between the outer periphery of the busbar and the cylinder; a plurality of circumferential limit protrusions are extended from the outer periphery of the annular flat plate; the plurality of circumferential limit protrusions abut against the inner wall of the cylinder to fix the busbar.

[0012] Furthermore, the fluidized bed also includes: an air heating and filtering device, which is arranged at the air inlet and is used to heat and filter the external air flow and then send it into the air inlet; a motor, which is arranged on the outside of the upper end of the cylinder and is connected to the drive shaft and is used to drive the centrifugal fan blades; a terminal filter, which is connected to the exhaust port through a pipeline and is used to filter the air flow discharged from the exhaust port; and an exhaust fan, which is connected to the terminal filter through a pipeline and is used to provide exhaust power.

[0013] Furthermore, the fluidized bed also includes: an atomizing spray gun; the atomizing spray gun is arranged at the upper end of the silo and below the manifold; the gun head of the atomizing spray gun faces the lower end of the silo.

[0014] Furthermore, the fluidized bed also includes: an atomizing spray gun; the atomizing spray gun is arranged on a filter screen device located at the lower end of the silo; and the gun head of the atomizing spray gun faces the upper end of the silo.

[0015] Furthermore, a guide tube is arranged around the atomizing spray gun; the guide tube is a cylindrical structure which is transparent from top to bottom; the gun head of the atomizing spray gun is located in the cylindrical space of the guide tube; the bottom end of the guide tube maintains a predetermined distance from the filter device.

[0016] The technical solution of the present application uses centrifugal fan blades as a driving force to form an inner spiral airflow pointing upward near the axis and an outer spiral airflow pointing downward along the inner wall of the cylinder, and a convergence plate for the first air outlet and the second air outlet is further provided at the lower end of the cylinder; the first air outlet is distributed close to the center of the convergence plate, and the second air outlet is distributed along the periphery of the convergence plate. The fluidized solid particles (such as dust) in the silo rise along the inner spiral airflow of the first air outlet, descend along the outer spiral airflow after being acted upon by the centrifugal force of the centrifugal fan blades, and flow back to the silo through the second air outlet, thereby achieving the technical purpose of the present application, and the technical cost of realizing the present application is low, the difficulty of realizing the technical solution is low, the reflux of solid particles (such as dust) can be effectively realized, and it has strong practicality. The fluidized bed of the present application can be widely used in various scenarios and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0018] Figure 1 A schematic diagram of the structure of a fluidized bed provided in one embodiment of the present application;

[0019] Figure 2 A schematic diagram of the structure of a busbar provided in one embodiment of the present application;

[0020] Figure 3 A schematic structural diagram of a busbar provided in another embodiment of the present application;

[0021] Figure 4 A schematic structural diagram of a fluidized bed provided in yet another embodiment of the present application;

[0022] Figure 5 A schematic diagram of the structure of a fluidized bed provided in yet another embodiment of the present application.

[0023] Description of reference numerals:

[0024] 1-cylinder; 2-convex plate; 3-silo; 4-centrifugal fan blade; 21-first air outlet; 22-second air outlet; 5-exhaust outlet; 6-air inlet; 7-driving shaft; 8-bottom bin; 9-filter device; 23-first circumferential limiting protrusion; 24-circular flat plate; 25-annular flat plate; 26-second circumferential limiting protrusion; 10-air heating and filtering device; 11-motor; 12-terminal filter; 13-exhaust fan; 14-first atomizing spray gun; 141-bracket; 15-second atomizing spray gun; 16-guide tube. DETAILED DESCRIPTION

[0025] The present application is further described in detail below in conjunction with the accompanying drawings. The following description with reference to the accompanying drawings is intended to facilitate a comprehensive understanding of the various embodiments of the present application as defined by the claims and their equivalents. These embodiments include various specific details for ease of understanding, but these are only considered to be exemplary. Therefore, those skilled in the art will appreciate that various changes and modifications to the various embodiments described herein will not depart from the scope and spirit of the present application. In addition, in order to briefly and clearly describe the present application, the present application will omit the description of well-known functions and structures.

[0026] The terms and phrases used in the following specification and claims are not limited to the literal meanings, but are only to enable a clear and consistent understanding of the present application. Therefore, it will be appreciated by those skilled in the art that the description of various embodiments of the present application is provided only for the purpose of illustration, rather than to limit the present application of the appended claims and their equivalent definitions.

[0027] The following will be combined with the drawings in some embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] It should be noted that the terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "one", "one", "a kind of", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more bound listed items. The expressions "first", "second", "the first" and "the second" are used to modify the corresponding elements without considering the order or importance, and are only used to distinguish one element from another element, without limiting the corresponding elements.

[0029] Embodiment 1

[0030] like Figure 1 As shown, an embodiment of the present application provides a fluidized bed comprising: a cylinder 1, a centrifugal fan blade 4 and a silo 3; the cylinder 1 is a cylindrical container structure with a closed upper end and an open lower end, wherein the axis is perpendicular to the ground; a baffle 2 is arranged at the lower end of the cylinder 1, and the baffle 2 has a first air port 21 and a second air port 22; wherein the first air port 21 is distributed close to the center of the baffle 2, and the second air port 22 is distributed along the periphery of the baffle 2; the cylinder 1 is connected with the upper end of the silo 3 through the baffle 2; the centrifugal fan blade 4 is located inside the cylinder 1 and close to the upper end of the cylinder 1; an exhaust port 5 is provided at the upper end of the cylinder 1, and the exhaust port 5 is located above the plane where the centrifugal fan blade 4 is located; the lower end of the silo 3 is connected to the air inlet 6.

[0031] The working principle of the first embodiment is introduced as follows: when the centrifugal fan blades 4 rotate, the air below the centrifugal fan blades 4 flows upward, and after being accelerated by the centrifugal fan blades 4, it flows outward along the edge of the centrifugal fan blades 4 toward the inner wall of the cylinder 1, forming an outer spiral airflow; the outer spiral airflow moves downward while rotating and reaches the confluence plate 2, and a part of the airflow continues to move downward through the second air outlet 22 of the confluence plate 2 (such as the gap between the surrounding of the confluence plate 2 and the inner wall of the cylinder 1), and the other part of the airflow reduces the rotation radius and moves toward the center of the cylinder 1, then changes direction and moves upward to form an inner spiral airflow; the inner and outer spiral airflows have the same rotation direction and opposite translation directions. After starting the exhaust system, part of the airflow flows out of the cylinder 1 through the exhaust port 5, and the airflow flows into the cylinder 1 through the air inlet 6 and the silo 3, causing the solid particles (such as dust) in the silo 3 to boil (fluidize). The air flow carries solid particles (such as dust) through the first air outlet 21, passes through the convergence plate 2, and merges into the inner spiral airflow. The solid particles (such as dust) move outward under the action of centrifugal force, and after reaching the inner wall of the cylinder 1, they move downward under the push of the outer spiral airflow, and finally flow downward through the second air outlet 22 of the convergence plate 2 (such as the gap between the surrounding area of ​​the convergence plate 2 and the inner wall of the cylinder 1) to return to the silo 3, thereby realizing the separation and reflux of solid particles (such as dust). The technical cost of this embodiment is low, the difficulty of implementing the technical solution is low, and it can effectively realize the reflux of solid particles (such as dust). It has strong practicality. The fluidized bed of this application can be widely used in various scenarios and has a wide range of applications.

[0032] As an optional embodiment, the fluidized bed also includes: a drive shaft 7, which passes through the upper end of the cylinder 1 and extends to the interior of the cylinder 1; and the drive shaft 7 is located on the central axis of the cylinder 1, that is, the central axis of the drive shaft 7 coincides with the central axis of the cylinder 1; the centrifugal fan blades 4 are installed on the drive shaft 7; and the centrifugal fan blades 4 rotate under the drive of the drive shaft 7.

[0033] As an optional embodiment, the fluidized bed also includes: a bottom bin 8, which is arranged between the silo 3 and the air inlet 6; one end of the bottom bin 8 is connected to the silo 3, and the other end is connected to the air inlet 6; the external air flow enters the cylinder 1 through the air inlet 6, the bottom bin 8, and the silo 3 in sequence.

[0034] As an optional embodiment, the fluidized bed further comprises: a filter screen device 9 having sieve holes, wherein the filter screen device 9 is arranged at the bottom of the silo 3 ; the silo 3 is connected to the bottom silo 8 via the filter screen device 9 .

[0035] like Figure 2 As shown, as an optional embodiment, the convergence plate 2 is circular (such as a circular flat plate 24), and the center of the convergence plate 2 is located on the central axis of the cylinder 1; a plurality of first air outlets 21 are opened on the convergence plate 2 and are evenly distributed in a ring shape; in addition, the first air outlets 21 are distributed around the center of the convergence plate 2; the radius of the convergence plate 2 is smaller than the radius of the cylinder 1 at the location of the convergence plate 2, so that an annular second air outlet 22 is formed between the outer periphery of the convergence plate 2 and the cylinder 1, specifically, the gap between the outer periphery of the convergence plate 2 and the inner wall of the cylinder 1, that is, the size of the second air outlet 22 is 2%-15% of the radius of the cylinder 1.

[0036] As an optional embodiment, a plurality of first circumferential limiting protrusions 23 are extended from the outer circumference of the busbar 2; the plurality of first circumferential limiting protrusions 23 abut against the inner wall of the cylinder 1 to fix the busbar 2. Of course, the busbar 2 can also be fixed in the cylinder 1 by other conceivable methods, such as hanging, etc., which are not limited here.

[0037] like Figure 3 As shown, as an optional embodiment, the convergence plate 2 includes: a circular flat plate 24 and a hollow annular flat plate 25; the annular flat plate 25 and the circular flat plate 24 are arranged correspondingly up and down, and the annular gap between the two plates naturally forms an annular first air outlet 21; wherein, the circular flat plate 24 is fixed on the annular flat plate 25 by a fixing bracket, and the radius of the circular flat plate 24 is not less than the radius of the circular hollow area of ​​the annular flat plate 25; the radius of the annular flat plate 25 is less than the radius of the cylinder 1 at the position of the convergence plate 2, so that an annular second air outlet 22 is formed between the outer periphery of the convergence plate 2 and the cylinder 1.

[0038] As an optional embodiment, a plurality of second circumferential limiting protrusions 26 are extended from the outer circumference of the annular flat plate 25; the plurality of second circumferential limiting protrusions 26 abut against the inner wall of the cylinder 1 to fix the collector plate 2. The distance between the outer edge of the first air outlet 21 and the outer circumference of the collector plate 2 is 8%-40% of the radius of the cylinder 1. Of course, the collector plate 2 can also be fixed in the cylinder 1 by other conceivable methods, such as hanging methods, etc., which are not limited here.

[0039] The technical solution of the first embodiment of the present application is driven by centrifugal fan blades to form an inner spiral airflow pointing upward near the axis and an outer spiral airflow pointing downward along the inner wall of the cylinder 1 in the cylinder 1, and a confluence plate 2 with a first air outlet 21 and a second air outlet 22 is further provided at the lower end of the cylinder 1; the first air outlet 21 is distributed close to the center of the confluence plate 2, and the second air outlet 22 is distributed along the periphery of the confluence plate 2, and the fluidized solid particles (such as dust) in the silo 3 rise along the inner spiral airflow of the first air outlet 21, descend along the outer spiral airflow after being acted upon by the centrifugal force of the centrifugal fan blades 4, and flow back to the silo 3 through the second air outlet 22, thereby achieving the technical purpose of the present application, and the technical cost of realizing the present application is low, the difficulty of realizing the technical solution is low, and the reflux of solid particles (such as dust) can be effectively realized, which has strong practicality. The fluidized bed of the present application can be widely used in various scenarios and has a wide range of applications.

[0040] Embodiment 2

[0041] According to another aspect of the present application, embodiment 2 is provided on the basis of embodiment 1 of the present application, which further realizes the fluidized drying function on the basis of realizing the function of reflow of solid particles (such as dust), and can be widely used in process occasions requiring fluidized drying.

[0042] On the basis of Example 1, its fluidized bed also includes: an air heating and filtering device 10, which is arranged at the air inlet 6, and is used to heat and filter the external air flow and then send it into the air inlet 6; a motor 11, which is arranged on the outside of the upper end of the cylinder 1 and is connected to the drive shaft 7, and is used to drive the centrifugal fan blades 4; a terminal filter 12, which is connected to the exhaust port 5 through a pipeline, and is used to filter the air flow discharged from the exhaust port 5; an exhaust fan 13, which is connected to the terminal filter 12 through a pipeline, and is used to provide exhaust power.

[0043] The working principle of the second embodiment is introduced as follows: first, the power system of the equipment is started, and the motor 11 drives the driving shaft 7 and the centrifugal blades 4 to rotate. The air below the centrifugal blades 4 flows upward, and after being accelerated by the centrifugal blades 4, it flows outward along the edge of the blades to the inner wall of the cylinder 1, forming an outer spiral airflow; the outer spiral airflow moves downward while rotating and reaches the manifold 2, and a part of the airflow continues to move downward through the second air port 22 of the manifold 2 (such as the gap between the manifold 2 and the inner wall of the cylinder 1), and the other part of the airflow reduces the rotation radius and moves toward the center of the cylinder 1, then changes direction and moves upward to form an inner spiral airflow; the rotation direction of the inner and outer spiral airflows is the same, and the translation direction is opposite. After the exhaust fan 13 is started, part of the airflow in the cylinder 1 passes through the exhaust port 5, the exhaust duct and the terminal filter 12 under the action of negative pressure, and is discharged outdoors. The external air flows into the cylinder 1 through the air heating and filtering device 10, the air inlet 6, the bottom bin 8, the filter screen device 9 (such as a screen), and the silo 3 in sequence, so that the material on the filter screen device 9 (such as a screen) is in a boiling state. The airflow carries solid particles (such as dust) in the material, passes through the convergence plate 2 through the first air port 21, and merges into the inner spiral airflow. The solid particles (such as dust) move outward under the action of centrifugal force, and after reaching the inner wall of the cylinder 1, they move downward under the push of the outer spiral airflow, and finally flow back downward into the silo 3 through the second air port 22 (such as the gap between the outer edge of the convergence plate 2 and the inner wall of the cylinder 1). At the same time, under the action of the air heating and filtering device 10, the hot air flow generated passes through the air inlet 6 and enters the chamber (silo 3), so that the solid particles (such as dust) boil, and the solid particles (such as dust) are dried while flowing back. The separation efficiency is high, the dust can flow back to the silo 3 directly, the technical cost is low, the difficulty of implementing the technical solution is low, and the reflux and drying of solid particles (such as dust) can be effectively realized, which has strong practicality.

[0044] In addition, based on the second embodiment of the present application, different functions can be achieved by setting the atomizing spray gun in different positions, such as the third embodiment and the fourth embodiment.

[0045] Embodiment 3

[0046] According to another aspect of the present application, embodiment 3 is provided on the basis of embodiment 2 of the present application, which further realizes the function of one-step granulation on the basis of realizing the functions of reflux and fluidized drying of solid particles (such as dust), and can be widely used in process occasions requiring fluidized drying.

[0047] On the basis of the second embodiment, the fluidized bed further includes: a first atomizing spray gun 14; the first atomizing spray gun 14 is arranged at the upper end of the silo 3 and is located below the manifold 2; the gun head of the first atomizing spray gun 14 is facing the lower end of the silo 3; the first atomizing spray gun 14 is fixed to the inside of the chamber of the silo 3 by a bracket 141.

[0048] The working principle of the third embodiment is introduced as follows: first, the power system of the equipment is started, and the motor 11 drives the driving shaft 7 and the centrifugal blades 4 to rotate. The air below the centrifugal blades 4 flows upward, and after being accelerated by the centrifugal blades 4, it flows outward along the edge of the blades to the inner wall of the cylinder 1, forming an outer spiral airflow; the outer spiral airflow moves downward while rotating and reaches the manifold 2, and a part of the airflow continues to move downward through the second air port 22 of the manifold 2 (such as the gap between the manifold 2 and the inner wall of the cylinder 1), and the other part of the airflow reduces the rotation radius and moves toward the center of the cylinder 1, then changes direction and moves upward to form an inner spiral airflow; the rotation direction of the inner and outer spiral airflows is the same, and the translation direction is opposite. After the exhaust fan 13 is started, part of the airflow in the cylinder 1 passes through the exhaust port 5, the exhaust duct and the terminal filter 12 under the action of negative pressure, and is discharged outdoors. The external air flows into the cylinder 1 through the air heating and filtering device 10, the air inlet 6, the bottom bin 8, the filter screen device 9 (such as a screen), and the silo 3 in sequence, so that the material on the filter screen device 9 (such as a screen) is in a boiling state. The solid particles (such as dust) in the material carried by the air flow pass through the first air port 21 through the manifold 2 and merge into the inner spiral air flow. The solid particles (such as dust) move outward under the action of centrifugal force. After reaching the inner wall of the cylinder 1, they move downward under the push of the outer spiral air flow, and finally flow downward back to the silo 3 through the second air port 22 (such as the gap between the outer edge of the manifold 2 and the inner wall of the cylinder 1). At the same time, a first atomizing spray gun 14 is installed on the top of the silo 3 to spray adhesive or liquid medicine, so that the boiling material in the chamber condenses into fine particles. At the same time, under the action of the air heating and filtering device 10, the hot air flow generated passes through the air inlet 6 and enters the interior of the chamber, so that the boiling material condenses and dries at the same time. As the amount of adhesive sprayed increases, the fine particles gradually increase, thereby realizing the function of one-step granulation.

[0049] Embodiment 4

[0050] According to another aspect of the present application, Example 4 is provided on the basis of Example 2 of the present application, which further realizes the function of material coating on the basis of realizing the function of reflux of solid particles (such as dust).

[0051] As an optional embodiment, the fluidized bed further comprises: a second atomizing spray gun 15 ; the second atomizing spray gun 15 is arranged on a filter device 9 located at the lower end of the silo 3 ; the gun head of the second atomizing spray gun 15 faces the upper end of the silo 3 .

[0052] As an optional embodiment, a guide tube 16 is arranged around the second atomizing spray gun 15; the guide tube 16 is a cylindrical structure that is transparent from top to bottom; the gun head of the second atomizing spray gun 15 is located in the cylindrical space of the guide tube 16; the bottom end of the guide tube 16 maintains a predetermined distance from the filter device 9.

[0053] First, the power system of the equipment is started. The motor 11 drives the drive shaft 7 and the centrifugal blades 4 to rotate. The air below the centrifugal blades 4 flows upward, and after being accelerated by the centrifugal blades 4, it flows outward along the edge of the blades toward the inner wall of the cylinder 1, forming an outer spiral airflow; the outer spiral airflow moves downward while rotating and reaches the manifold 2. A part of the airflow passes through the second air port 22 of the manifold 2 (such as the gap between the manifold 2 and the inner wall of the cylinder 1) and continues to move downward. The other part of the airflow reduces the rotation radius and moves toward the center of the cylinder 1, then changes direction and moves upward to form an inner spiral airflow; the rotation directions of the inner and outer spiral airflows are the same, and the translation directions are opposite. After the exhaust fan 13 is started, part of the airflow in the cylinder 1 passes through the exhaust port 5, the exhaust duct and the terminal filter 12 under the action of negative pressure, and is discharged outdoors. The external air flows into the cylinder 1 through the air heating and filtering device 10, the air inlet 6, the bottom bin 8, the filter screen device 9 (such as a screen), and the silo 3 in sequence, so that the material on the filter screen device 9 (such as a screen) is in a boiling state. The airflow carries solid particles (such as dust) in the material, passes through the first air port 21 through the manifold 2, and merges into the inner spiral airflow. The solid particles (such as dust) move outward under the action of centrifugal force, and after reaching the inner wall of the cylinder 1, they move downward under the push of the outer spiral airflow, and finally flow downward back to the silo 3 through the second air port 22 (such as the gap between the outer edge of the manifold 2 and the inner wall of the cylinder 1). At the same time, one or more second atomizing spray guns 15 are installed on the filter screen device 9 (such as a screen) for spraying the coating liquid. Each second atomizing spray gun 15 is surrounded by a guide tube 16, and the bottom of the guide tube 16 A certain distance is maintained between the part and the filter screen device 9 (such as a screen), and the bottom of the silo 3 is divided into two parts. The outside of the guide tube 16 is called the expansion bin, and the inside of the guide tube 16 is called the conveying bin. Under the action of the airflow in the chamber, its own gravity, circumferential centrifugal force, and friction, the materials in the expansion bin and the conveying bin form an internal small circulation motion, so that the coating liquid sprayed by the second atomizing spray gun 15 is evenly coated on the material particles. At the same time, under the action of the air heating and filtering device 10, the hot air flow generated passes through the air inlet 6, and the material in the chamber is coated and dried at the same time, thereby realizing the function of material coating.

[0054] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and that the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is limited by the attached claims rather than the above description, so it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims in the present application. Any figure mark in the claims should not be regarded as limiting the claims involved. In addition, it is obvious that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in the device claim can also be implemented by one unit or device through software or hardware. The words first, second, etc. are used to indicate names, and do not indicate any particular order.

Claims

1. A fluidized bed, characterized in that: include: A cylinder (1), a manifold (2), a silo (3), and a centrifugal fan blade (4); The cylinder (1) is a cylindrical container structure with a closed upper end and an open lower end; The collector plate (2) is arranged at the lower end of the cylinder (1), and the collector plate (2) has a first air outlet (21) and a second air outlet (22); Wherein, the first air outlet (21) is distributed close to the center of the busbar (2), and the second air outlet (22) is distributed along the periphery of the busbar (2); The cylinder (1) is connected to the upper end of the silo (3) through the manifold (2); The centrifugal fan blade (4) is located inside the cylinder (1) and close to the upper end of the cylinder (1); An air outlet (5) is provided at the upper end of the cylinder (1); The lower end of the silo (3) is connected to the air inlet (6); Also includes: A drive shaft (7), the drive shaft (7) passing through the upper end of the cylinder (1) and extending into the interior of the cylinder (1); Furthermore, the driving shaft (7) is located on the central axis of the cylinder (1); the centrifugal fan blades (4) are mounted on the driving shaft (7); The centrifugal fan blades (4) rotate under the drive of the driving shaft (7); Also includes: A bottom bin (8), the bottom bin (8) being arranged between the material bin (3) and the air inlet (6); one end of the bottom bin (8) being connected to the material bin (3), and the other end being connected to the air inlet (6); External air flows into the cylinder (1) through the air inlet (6), the bottom bin (8), and the material bin (3) in sequence.

2. The fluidized bed according to claim 1, characterized in that Also includes: A filter device (9) having sieve holes, wherein the filter device (9) is arranged at the bottom of the silo (3); the silo (3) is connected to the bottom silo (8) via the filter device (9).

3. The fluidized bed according to claim 1, characterized in that The collector plate (2) is circular, and the center of the collector plate (2) is located on the central axis of the cylinder (1); a plurality of first air outlets (21) are provided on the collector plate (2) and are evenly distributed in a ring shape; The radius of the collector plate (2) is smaller than the radius of the cylinder (1) at the location of the collector plate (2), so that an annular second air outlet (22) is formed between the outer periphery of the collector plate (2) and the cylinder (1).

4. The fluidized bed according to claim 1, characterized in that The busbar (2) comprises: a circular flat plate (24) and a hollow annular flat plate (25); The annular flat plate (25) and the circular flat plate (24) are arranged correspondingly up and down to form the first annular air outlet (21); The radius of the annular flat plate (25) is smaller than the radius of the cylinder (1) at the position where the annular flat plate (25) is located, so that an annular second air outlet (22) is formed between the outer periphery of the annular flat plate (25) and the cylinder (1).

5. The fluidized bed according to any one of claims 1 to 4, characterized in that Also includes: An air heating and filtering device (10) is disposed at the air inlet (6) and is used to heat and filter the external air flow before sending it into the air inlet (6); A motor (11), arranged outside the upper end of the cylinder (1), connected to the drive shaft (7), and used for driving the centrifugal fan blades (4); A terminal filter (12) is connected to the air outlet (5) through a pipeline and is used to filter the air flow discharged from the air outlet (5); An exhaust fan (13) is connected to the terminal filter (12) through a pipeline and is used to provide exhaust power.

6. The fluidized bed according to claim 5, characterized in that Also includes: A first atomizing spray gun (14); The first atomizing spray gun (14) is arranged at the upper end of the silo (3) and is located below the manifold (2); the gun head of the first atomizing spray gun (14) faces the lower end of the silo (3).

7. The fluidized bed according to claim 6, characterized in that Also includes: at least one second atomizing spray gun (15); the second atomizing spray gun (15) is arranged on a filter device (9) located at the lower end of the silo (3); The gun head of the atomizing spray gun (15) faces the upper end of the silo (3).

8. The fluidized bed according to claim 7, characterized in that Also includes: The guide tube (16) is a cylindrical structure that is transparent from top to bottom; A guide tube (16) is correspondingly arranged around each of the second atomizing spray guns (15); The gun head of each of the second atomizing spray guns (15) is located in the cylindrical space of its corresponding guide tube (16); the bottom end of each of the guide tubes (16) maintains a predetermined distance from the filter device (9).

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