CN111632559A - a fluidized bed - Google Patents

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; the lower end of the cylinder is provided with a confluence plate, so The confluence board has a first tuyere and a second tuyere; wherein, the first tuyere is distributed near the center of the confluence board, and the second tuyere is distributed along the outer circumference of the confluence board; the cylinder passes through the confluence board The plate is communicated with the upper end of the silo; the centrifugal fan blade is located inside the cylinder body and is close to the upper end of the cylinder body; the upper end of the cylinder body is provided with an air outlet; the lower end of the silo is communicated Air inlet; by driving the centrifugal fan blades, and then setting up the confluence board used in conjunction with the centrifugal fan blades, the internal and external spiral airflow can be formed in the cylinder, so that the dust can achieve natural backflow under the action of the internal and external spiral airflow, which can overcome the Disadvantages of filter dust removal and cyclone dust removal.

Description

a fluidized bed

technical field

The present application relates to the technical field of machinery, and in particular, to a fluidized bed.

Background technique

Fluidized bed, also known as ebullated bed, is a device that uses gas to pass through a granular solid layer to keep solid particles in a suspended motion state and conduct gas-solid phase reactions. Ebullated beds are widely used in chemical, pharmaceutical, food, boiler, mining and other fields, as the core equipment for drying, chemical reaction, combustion, granulation, coating and other technological processes. During the working process of the fluidized bed, when the gas passes through the solid particle layer, a large amount of dust will be taken away, and the dust needs to be separated by a filter separation device, otherwise the yield will be reduced and the environment will be polluted. There are two main traditional separation methods, one is filtration and the other is cyclone separation.

There are two main disadvantages of the filtration method. One is that the filter material is easy to block, and the dust accumulated on the filter material needs to be cleaned by means of vibration and backflushing; the other is that it is difficult to clean and replace the filter material.

The cyclone separation method uses a cyclone to separate the dust carried away by the air. It has two main disadvantages: one is the low separation efficiency, which leads to a large amount of fine powder outflow; the other is that the dust cannot be directly returned to the fluidized bed, and additional backflow needs to be used. The device increases equipment investment and reduces work efficiency.

SUMMARY OF THE INVENTION

In order to solve the above problem, the present application aims to provide a fluidized bed, which can realize the natural backflow of dust, and can overcome the shortcomings of filter dust removal and cyclone dust removal.

The fluidized bed of the present application includes: a cylinder body, a centrifugal fan blade and a silo; the cylinder body is a cylindrical container structure with a closed upper end and an open lower end; A tuyere and a second tuyere; wherein, the first tuyere is distributed near the center of the converging plate, and the second tuyere is distributed along the outer circumference of the converging plate; the cylinder is connected to the material through the converging plate The upper end of the silo is communicated; the centrifugal fan blade is located inside the cylinder body and is close to the upper end of the cylinder body; the upper end of the cylinder body is provided with an air outlet; the lower end of the silo is connected to the air inlet.

Further, the fluidized bed further comprises: a drive shaft, which penetrates the upper end of the cylindrical body and extends to the interior of the cylindrical body; and the drive shaft is located on the central axis of the cylindrical body; The centrifugal fan blade is mounted on the drive shaft; the centrifugal fan blade rotates under the drive of the drive shaft.

Further, the fluidized bed further comprises: a bottom silo, which is arranged between the silo and the air inlet; one end of the bottom silo is connected to the silo, and the other end is connected to the air inlet; the external air flow It enters the cylinder through the air inlet, the bottom silo and the material silo in sequence.

Further, the fluidized bed further comprises: a screening device with screen holes, the screening device is arranged at the bottom of the silo; the silo is communicated with the bottom silo through the screening device.

Optionally, the confluence plate is circular, and the center of the confluence plate is located on the central axis of the cylinder; the confluence plate is provided with a plurality of first air outlets and is evenly distributed in a ring shape; the confluence plate The radius of the confluence plate is smaller than the radius of the cylinder at the position of the confluence plate, so that an annular second tuyere is formed between the outer circumference of the confluence plate and the cylinder; the outer circumference of the confluence plate is extended with a plurality of circumferential limiters Positioning protrusions; the plurality of circumferential limiting protrusions abut on the inner wall of the cylinder to fix the manifold.

Optionally, the confluence plate 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 an annular first tuyere; the radius of the annular flat plate is smaller than that of the confluence flow The radius of the cylinder at the position of the plate, so that an annular second tuyere is formed between the outer circumference of the confluence plate and the cylinder; the outer circumference of the annular flat plate is extended with a plurality of circumferential limit protrusions; the A plurality of circumferential limiting protrusions abut against the inner wall of the cylinder to fix the manifold.

Further, the fluidized bed also includes: an air heating and filtering device, arranged at the air inlet, for heating and filtering the external air flow and sending it into the air inlet; a motor, arranged at the upper end of the cylinder body The outside of the filter is connected with the drive shaft to drive the centrifugal fan blades; the terminal filter is connected to the exhaust port through a pipe, and is used to filter the air flow discharged from the exhaust port; the exhaust fan, through the pipe It communicates with the final filter and is used for providing exhaust power.

Further, the fluidized bed further comprises: an atomizing spray gun; the atomizing spray gun is arranged at the upper end of the silo and below the converging plate; the gun head of the atomizing spray gun faces the silo the lower end.

Further, the fluidized bed further comprises: an atomizing spray gun; the atomizing spray gun is arranged on the screen device located at the lower end of the silo; the gun head of the atomizing spray gun faces the upper end of the silo.

Further, a guide tube is arranged around the atomizing spray gun; the guide tube is a cylindrical structure that is transparent up and down; 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 is kept at a predetermined distance from the screen device.

In the technical solution of the present application, a centrifugal fan blade is used as a driving method to form an inner spiral air flow near the axial center and an outer spiral air flow downward along the inner wall of the cylindrical body in the cylinder, and further a first spiral air flow is arranged at the lower end of the cylindrical body. A confluence plate of a tuyere and a second tuyere; the first tuyere is distributed near the center of the confluence plate, the second tuyere is distributed along the outer circumference of the confluence plate, and the fluidized solid particles (such as dust) in the silo are distributed along the first tuyere. The inner spiral airflow rises, descends along the outer spiral airflow after the centrifugal force of the centrifugal fan blade, and returns to the silo through the second air outlet, thereby achieving the technical purpose of the application, and the technical cost of the application is relatively low, and the technical solution is realized. The difficulty is low, the backflow of solid particles (such as dust) can be effectively realized, and it has strong practicability. The fluidized bed of the present application can be widely used in various scenarios and has a wide range of applications.

Description of drawings

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:

1 is a schematic structural diagram of a fluidized bed provided by one of the embodiments of the present application;

FIG. 2 is a schematic structural diagram of a manifold provided by an embodiment of the present application;

3 is a schematic structural diagram of a confluence plate provided by another embodiment of the present application;

4 is a schematic structural diagram of a fluidized bed provided by another embodiment of the present application;

FIG. 5 is a schematic structural diagram of a fluidized bed provided in still another embodiment of the present application.

Description of reference numbers:

1-Cylinder body; 2-Mixing plate; 3-Bunker; 4-Centrifugal fan blade; 21-First air outlet; 22-Second air outlet; 5-Air outlet; 6-Air inlet; 7-Drive shaft; 8 - bottom bin; 9 - filter screen device; 23 - first circumferential limit protrusion; 24 - circular flat plate; 25 - annular flat plate; 26 - second circumferential limit protrusion; 10 - air heating filter device; 11-motor; 12-terminal filter; 13-exhaust fan; 14-first atomizing spray gun; 141-support; 15-second atomizing spray gun; 16-guide cylinder.

Detailed ways

The present application will be described in further detail below with reference to the accompanying drawings. The following description with reference to the accompanying drawings is provided to facilitate a comprehensive understanding of various embodiments of the present application as defined by the claims and their equivalents. These embodiments include various specific details to facilitate understanding, but these are to be regarded as exemplary only. Accordingly, those of ordinary skill in the art will appreciate that various changes and modifications of the various embodiments described herein can be made without departing from the scope and spirit of the present application. Also, for the purpose of briefly and clearly describing the present application, the present application will omit descriptions of well-known functions and constructions.

The terms and phrases used in the following specification and claims are not limited to the bibliographical meanings, but are merely used to enable a clear and consistent understanding of this application. Accordingly, those skilled in the art will appreciate that the description of the various embodiments of the present application is provided for illustration purposes only and is not intended to limit the present application as defined by the appended claims and their equivalents.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in some embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

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. As used in the embodiments of this application and the appended claims, the singular forms "a," "an," "an," "said," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. indicate other meanings. It will also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items. The expressions "first", "second", "the first" and "the second" are used to modify the corresponding elements without regard to order or importance, and are only used to distinguish one element from another , without limiting the corresponding elements.

Example 1

As shown in FIG. 1, an embodiment of the present application provides a fluidized bed comprising: a cylinder 1, centrifugal fan blades 4 and a silo 3; the cylinder 1 is a cylindrical container with a closed upper end and an open lower end structure, wherein the axis is perpendicular to the ground; the lower end of the cylinder 1 is provided with a confluence plate 2, the confluence plate 2 has a first tuyere 21 and a second tuyere 22; wherein, the first tuyere 21 is close to the confluence plate 2 The center distribution of the second tuyere 22 is distributed along the outer circumference of the confluence plate 2; the cylinder 1 communicates with the upper end of the silo 3 through the confluence plate 2; the centrifugal fan 4 is located in the The inside of the cylinder body 1 is close to the upper end of the cylinder body 1; the upper end of the cylinder body 1 is provided with an air outlet 5, and the air outlet 5 is located above the plane where the centrifugal fan 4 is located; the silo 3 The lower end is connected to the air inlet 6 .

Introduction to the working principle of the first embodiment: when the centrifugal fan 4 rotates, the air below the centrifugal fan 4 flows upward, and after being accelerated by the centrifugal fan 4, it flows outward along the edge of the centrifugal fan 4 to the inner wall of the cylinder 1. , forming an outer spiral air flow; the outer spiral air flow moves downward while rotating and reaches the confluence plate 2, and a part of the air flow passes through the second tuyere 22 of the confluence plate 2 (such as the gap between the periphery of the confluence plate 2 and the inner wall of the cylinder 1) to continue Moving downward, the other part of the air flow reduces the rotation radius, moves toward the center of the cylinder 1, and then changes direction and moves upward to form an inner spiral air flow; the rotation direction of the inner and outer spiral air flow is the same, and the translation direction is opposite. After starting the exhaust system, part of the air flows out of the cylinder 1 through the exhaust port 5, and the air flows into the cylinder 1 through the air inlet 6 and the silo 3, so that the solid particles (such as dust) in the silo 3 are boiled (fluidized) . The air flow carries solid particles (such as dust), passes through the confluence plate 2 through the first tuyere 21, and merges into the inner spiral airflow. The solid particles (such as dust) move outward under the action of centrifugal force and reach the inner wall of the cylinder 1. , moves downward under the push of the outer spiral airflow, and finally flows back down into the silo 3 through the second tuyere 22 of the confluence plate 2 (such as the gap between the periphery of the confluence plate 2 and the inner wall of the cylinder 1), so as to realize the solid particles. (such as dust) separation and reflux, the technical cost of this embodiment is low, the technical solution is less difficult to realize, and the reflux of solid particles (such as dust) can be effectively realized, which has strong practicability. The fluidized bed of the present application can It is widely used in various scenarios and has a wide range of applications.

As an optional embodiment, the fluidized bed further includes: a drive shaft 7, the drive shaft 7 penetrates the upper end of the cylindrical body 1 and extends to the interior of the cylindrical body 1; and the drive shaft 7 is located on the central axis of the cylindrical body 1, that is, the central axis of the drive shaft 7 coincides with the central axis of the cylindrical body 1; the centrifugal fan blades 4 are mounted on the drive shaft 7; the centrifugal fan blades 4 It rotates under the drive of the drive shaft 7 .

As an optional embodiment, the fluidized bed further 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 material The other end of the silo 3 is connected to the air inlet 6; the external air flow enters the cylinder body 1 through the air inlet 6, the bottom silo 8 and the silo 3 in sequence.

As an optional embodiment, the fluidized bed further includes: a filter screen device 9 with screen holes, the filter screen device 9 is arranged at the bottom of the silo 3; the silo 3 passes through the filter Screen means 9 communicate with said bottom bin 8 .

As shown in FIG. 2 , as an optional implementation manner, the confluence plate 2 is circular (such as a circular flat plate 24 ), and the center of the confluence plate 2 is located on the central axis of the cylinder 1 ; The confluence plate 2 is provided with a plurality of first air openings 21 and is evenly distributed in a ring shape; in addition, the distribution of the first air openings 21 around the center of the confluence plate 2; the radius of the confluence plate 2 is smaller than the location where the confluence plate 2 is located The radius of the cylinder body 1 is determined so that an annular second tuyere 22 is formed between the outer circumference of the confluence plate 2 and the cylinder body 1. Specifically, the gap between the outer circumference of the confluence plate 2 and the inner wall of the cylinder body 1 is the second tuyere 22. The size of the cylinder is 2%-15% of the radius of the cylinder 1.

As an optional embodiment, a plurality of first circumferential limiting protrusions 23 are extended on the outer periphery of the confluence plate 2; the plurality of first circumferential limiting protrusions 23 abut against the cylinder body 1 to fix the manifold 2 on the inner wall. Of course, the confluence plate 2 can also be fixed in the cylinder body 1 by other conceivable ways, such as a hanging way, which is not limited here.

As shown in FIG. 3, as an optional embodiment, the confluence 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 two The annular gap between the flat plates naturally forms the annular first tuyere 21; wherein, the circular flat plate 24 is fixed on the annular flat plate 25 through the 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 plate 25 is smaller than the radius of the cylindrical body 1 at the position of the confluence plate 2 , so that an annular second tuyere 22 is formed between the outer periphery of the confluence plate 2 and the cylindrical body 1 .

As an optional embodiment, a plurality of second circumferential limit protrusions 26 are extended on the outer circumference of the annular flat plate 25; the plurality of second circumferential limit protrusions 26 abut against the cylinder body 1 to fix the manifold 2 on the inner wall. The distance between the outer edge of the first tuyere 21 and the outer circumference of the confluence plate 2 is 8%-40% of the radius of the cylinder body 1 . Of course, the confluence plate 2 can also be fixed in the cylinder body 1 by other conceivable ways, such as a hanging way, which is not limited here.

In the technical solution of the first embodiment of the present application, the centrifugal fan is used as the driving method to form an inner spiral airflow near the axis of the cylinder body 1 and an outer spiral airflow downward along the inner wall of the cylinder body 1, and further in the cylinder body 1 The lower end of the cylinder body 1 is provided with a confluence plate 2 with a first tuyere 21 and a second tuyere 22; the first tuyere 21 is distributed close to the center of the confluence plate 2, the second tuyere The solid material particles (such as dust) that have been fluidized rise along the inner spiral airflow of the first tuyere 21, descend along the outer spiral airflow after the centrifugal force of the centrifugal fan blades 4, and return to the silo 3 through the second tuyere 22, and then The technical purpose of the present application is achieved, and the technical cost of realizing the present application is relatively low, the technical solution is relatively difficult to realize, can effectively realize the backflow of solid particles (such as dust), and has strong practicability. The fluidized bed of the present application It can be widely used in various scenarios and has a wide range of applications.

Embodiment 2

According to another aspect of the present application, Embodiment 2 is provided on the basis of Embodiment 1 of the present application. On the basis of realizing the function of backflow of solid particles (such as dust), the fluidized drying function is further realized, which can be widely used in Process occasions where fluidized drying is required.

On the basis of the first embodiment, the fluidized bed further 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 send it into the air inlet 6; a motor 11 , which is arranged on the outside of the upper end of the cylinder body 1 and is connected to the drive shaft 7 for driving the centrifugal fan 4; the terminal filter 12 is communicated with the exhaust port 5 through a pipe, and is used for exhausting the air. The air flow discharged from the port 5 is filtered; the exhaust fan 13 communicates with the terminal filter 12 through a pipeline to provide exhaust power.

Introduction to the working principle of the second embodiment: First, the power system of the equipment is started, and the motor 11 drives the drive shaft 7 and the centrifugal fan 4 to rotate, and the air under the centrifugal fan 4 flows upward. After being accelerated by the centrifugal fan 4, it moves along the edge of the fan It flows outward to the inner wall of the cylinder body 1 to form an outer spiral airflow; the outer spiral airflow moves downward while rotating and reaches the confluence plate 2. 1 inner wall) continue to move downward, and the other part of the airflow reduces the rotation radius, moves toward the center of the cylinder 1, and then changes direction and moves upward to form an inner spiral airflow; the rotation direction of the inner and outer spiral airflow is the same, and the translation direction is opposite. After starting the exhaust fan 13, part of the air flow in the cylinder 1 passes through the exhaust port 5 under the action of negative pressure, and after the exhaust duct and the terminal filter 12, it is discharged to the outside, and the outside air passes through the air heating filter device 10 and the air inlet in turn. 6. The bottom bin 8, the screening device 9 (such as a screen), and the silo 3 flow into the cylinder body 1, so that the material on the screening 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 confluence plate 2 through the first tuyere 21, and merges into the inner spiral airflow. Under the action of centrifugal force, the solid particles (such as dust) move outward and reach the cylinder After the inner wall, it moves downward under the push of the outer spiral airflow, and finally flows back down into the silo 3 through the second air outlet 22 (such as the gap between the outer edge of the confluence plate 2 and the inner wall of the cylinder 1). Under the action of the filter device 10, the generated hot air enters the chamber (silo 3) through the air inlet 6, so that the solid particles (such as dust) are boiled, and the solid particles (such as dust) are dried while refluxing. , the separation efficiency is high, the dust can be directly returned to the silo 3, the technical cost is low, the technical solution is less difficult to achieve, and the backflow and drying of solid particles (such as dust) can be effectively realized, which has strong practicability.

In addition, on the basis of the second embodiment of the present application, different functions can be realized by the different arrangement positions of the atomizing spray gun, such as the third embodiment and the fourth embodiment.

Embodiment 3

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

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 below the converging plate 2; The gun head of the first atomizing spray gun 14 faces the lower end of the silo 3 ; the first atomizing spray gun 14 is fixed inside the chamber of the silo 3 through a bracket 141 .

The working principle of the third embodiment is introduced: firstly start the power system of the equipment, the motor 11 drives the drive shaft 7 and the centrifugal fan 4 to rotate, the air under the centrifugal fan 4 flows upward, and after being accelerated by the centrifugal fan 4, it moves along the edge of the fan. It flows outward to the inner wall of the cylinder body 1 to form an outer spiral airflow; the outer spiral airflow moves downward while rotating and reaches the confluence plate 2. 1 inner wall) continue to move downward, and the other part of the airflow reduces the rotation radius, moves toward the center of the cylinder 1, and then changes direction and moves upward to form an inner spiral airflow; the rotation direction of the inner and outer spiral airflow is the same, and the translation direction is opposite. After starting the exhaust fan 13, part of the air flow in the cylinder 1 passes through the exhaust port 5 under the action of negative pressure, and after the exhaust duct and the terminal filter 12, it is discharged to the outside, and the outside air passes through the air heating filter device 10 and the air inlet in turn. 6. The bottom bin 8, the screening device 9 (such as a screen), and the silo 3 flow into the cylinder body 1, so that the material on the screening device 9 (such as a screen) is in a boiling state. The solid particles (such as dust) in the material carried by the airflow pass through the confluence plate 2 through the first tuyere 21 and merge into the inner spiral airflow. Under the action of centrifugal force, the solid particles (such as dust) move outward and reach the cylinder 1 After the inner wall of the air flow, it moves downwards under the push of the outer spiral airflow, and finally flows back down into the silo 3 through the second air outlet 22 (such as the gap between the outer edge of the confluence plate 2 and the inner wall of the cylinder 1). 3. The top is equipped with a first atomizing spray gun 14, which is used to spray adhesive or liquid medicine, so that the boiling material in the chamber is condensed into fine particles, and at the same time, under the action of the air heating filter device 10, the generated hot air passes through The air inlet 6 enters the interior of the chamber, so that the boiling materials are condensed and dried. With the increase of the amount of binder sprayed, the fine particles gradually increase, so as to realize the function of one-step granulation.

Embodiment 4

According to yet another aspect of the present application, Embodiment 4 is provided on the basis of Embodiment 2 of the present application, which further realizes the function of material coating on the basis of realizing the function of backflow of solid particles (such as dust).

As an optional embodiment, the fluidized bed further includes: a second atomizing spray gun 15; the second atomizing spray gun 15 is disposed on the screen device 9 located at the lower end of the silo 3; the The gun head of the second atomizing spray gun 15 faces the upper end of the silo 3 .

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 up and down; The head 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 screen device 9 .

First start the equipment power system, the motor 11 drives the drive shaft 7 and the centrifugal fan blade 4 to rotate, the air under the centrifugal fan blade 4 flows upward, and after being accelerated by the centrifugal fan blade 4, it flows outward along the edge of the fan blade to the inner wall of the cylinder 1 , forming an outer spiral air flow; the outer spiral air flow moves downward while rotating and reaches the confluence plate 2, and part of the air flow passes through the second tuyere 22 of the confluence plate 2 (such as the gap around the confluence plate 2 and the inner wall of the cylinder 1) and continues downward. Moving, the other part of the airflow reduces the rotation radius, moves to the center of the cylinder 1, and then changes direction and moves upward to form an inner spiral airflow; the rotation direction of the inner and outer spiral airflow is the same, and the translation direction is opposite. After starting the exhaust fan 13, part of the air flow in the cylinder 1 passes through the exhaust port 5 under the action of negative pressure, and after the exhaust duct and the terminal filter 12, it is discharged to the outside, and the outside air passes through the air heating filter device 10 and the air inlet in turn. 6. The bottom bin 8, the screening device 9 (such as a screen), and the silo 3 flow into the cylinder body 1, so that the material on the screening 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 confluence plate 2 through the first tuyere 21, and merges into the inner spiral airflow. Under the action of centrifugal force, the solid particles (such as dust) move outward and reach the cylinder After the inner wall, it moves downwards under the push of the outer spiral airflow, and finally flows back down into the silo 3 through the second tuyere 22 (such as the gap between the outer edge of the confluence plate 2 and the inner wall of the cylinder 1). 9 (such as a screen) is equipped with one or more second atomizing spray guns 15 for spraying the coating liquid, and each second atomizing spray gun 15 is equipped with a guide tube 16 around the bottom of the guide tube 16. A certain distance is maintained between the screening devices 9 (such as screens), and the bottom of the silo 3 is divided into two parts. Under the action of its own gravity, circumferential centrifugal force and frictional force, the materials in the expansion bin and the conveying bin form an internal small circular motion, so that the coating liquid sprayed by the second atomizing spray gun 15 evenly coats the material particles, and at the same time , Under the action of the air heating and filtering device 10, the generated hot air passes through the air inlet 6, and wraps and dries the materials in the chamber, thereby realizing the function of material coating.

It will be apparent to those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Accordingly, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the application is to be defined by the appended claims rather than the foregoing description, which is therefore intended to fall within the scope of the claims. All changes within the meaning and scope of the equivalents of , are included in this application. Any reference signs in the claims shall not be construed as limiting the involved claim. Furthermore, it is clear that the word "comprising" does not exclude other units or steps and the singular does not exclude the plural. Several units or means recited in the device claims can also be realized by one unit or means by means of software or hardware. The terms first, second, etc. are used to denote names and do not denote any particular order.

Claims (10)

1. A fluidized bed, comprising: the device comprises a cylinder body (1), a bus bar (2), a storage bin (3) and a centrifugal fan blade (4);

the cylinder body (1) is of a cylindrical container structure with a closed upper end and an open lower end;

the bus bar (2) is arranged at the lower end of the barrel (1), and the bus bar (2) is provided with a first air opening (21) and a second air opening (22);

the first air ports (21) are distributed close to the center of the bus bar (2), and the second air ports (22) are distributed along the periphery of the bus bar (2);

the cylinder body (1) is communicated with the upper end of the storage bin (3) through the bus board (2);

the centrifugal fan blade (4) is positioned in the barrel body (1) and is close to the upper end of the barrel body (1);

an air outlet (5) is formed in the upper end of the cylinder body (1);

the lower end of the stock bin (3) is communicated with an air inlet (6).

2. The fluidized bed of claim 1, further comprising:

a driving shaft (7), wherein the driving shaft (7) penetrates through the upper end of the cylinder body (1) and extends to the inside of the cylinder body (1);

the driving shaft (7) is positioned on the central axis of the cylinder body (1);

the centrifugal fan blade (4) is arranged on the driving shaft (7);

the centrifugal fan blade (4) is driven by the driving shaft (7) to rotate.

3. The fluidized bed of claim 1, further comprising:

the bottom bin (8), the said bottom bin (8) is set up between said feed bin (3) and said air intake (6);

one end of the bottom bin (8) is communicated with the stock bin (3), and the other end of the bottom bin is communicated with the air inlet (6);

the external air flow sequentially passes through the air inlet (6), the bottom bin (8) and the stock bin (3) to enter the barrel body (1).

4. The fluidized bed of claim 3, further comprising:

a screen device (9) with screen holes, wherein the screen device (9) is arranged at the bottom of the storage bin (3);

the stock bin (3) is communicated with the bottom bin (8) through the filter screen device (9).

5. The fluidized bed according to claim 1,

the cylinder body (1) is characterized in that the bus bar (2) is circular, and the circle center of the bus bar (2) is located on the central axis of the cylinder body (1);

a plurality of first air ports (21) are formed in the bus bar (2) and are uniformly distributed in an annular shape;

the radius of the bus bar (2) is smaller than that of the cylinder (1) at the position of the bus bar (2), so that an annular second air opening (22) is formed between the periphery of the bus bar (2) and the cylinder (1).

6. The fluidized bed according to claim 1,

the bus bar (2) includes: a circular plate (24) and a hollow annular plate (25);

the annular flat plate (25) and the circular flat plate (24) are arranged up and down correspondingly to form the annular first air opening (21);

the radius of the annular flat plate (25) is smaller than that of the barrel (1) at the position of the annular flat plate, so that the annular second air opening (22) is formed between the periphery of the annular flat plate (25) and the barrel (1).

7. The fluidized bed according to any one of claims 1 to 6, further comprising:

the air heating and filtering device (10) is arranged at the air inlet (6) and is used for heating and filtering external air flow and then sending the air flow into the air inlet (6);

the motor (11) is arranged outside the upper end of the barrel (1), is connected with the driving shaft (7) and is used for driving the centrifugal fan blade (4);

the terminal filter (12) is communicated with the air outlet (5) through a pipeline and is used for filtering the air flow discharged by the air outlet (5);

and the exhaust fan (13) is communicated with the terminal filter (12) through a pipeline and is used for providing exhaust power.

8. The fluidized bed of claim 7, further comprising: a first atomizing lance (14);

the first atomizing spray gun (14) is arranged at the upper end of the storage bin (3) and is positioned below the confluence plate (2);

the gun head of the first atomizing spray gun (14) faces the lower end of the storage bin (3).

9. The fluidized bed of claim 7, further comprising: at least one second atomizing lance (15);

the second atomizing spray gun (15) is arranged on a filter screen device (9) positioned at the lower end of the storage bin (3);

the gun head of the atomizing spray gun (15) faces the upper end of the storage bin (3).

10. The fluidized bed of claim 9, further comprising: a guide shell (16);

the guide cylinder (16) is of a cylindrical structure which is through up and down;

the periphery of each second atomization spray gun (15) is correspondingly provided with one guide cylinder (16);

the gun head of each second atomization spray gun (15) is positioned in the cylindrical space of the guide cylinder (16) which is correspondingly arranged;

the bottom end of each guide cylinder (16) is kept at a preset distance from the screen device (9).

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