CN111632559A

CN111632559A - Fluidized bed

Info

Publication number: CN111632559A
Application number: CN202010630184.5A
Authority: CN
Inventors: 刘春�; 李建桥
Original assignee: Beijing Lanting Science And Technology Equipment Co ltd
Current assignee: Beijing Lanting Science And Technology Equipment Co ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2020-09-08

Abstract

The present application aims to provide a fluidized bed comprising: the device comprises a cylinder, a centrifugal fan blade and a bin; the cylinder body is of a cylindrical container structure with a closed upper end and an open lower end; the lower end of the cylinder is provided with a bus bar, and the bus bar is provided with a first air port and a second air port; the first air ports are distributed close to the center of the bus bar, and the second air ports are distributed along the periphery of the bus bar; the cylinder body is communicated with the upper end of the storage bin through the bus board; the centrifugal fan blade is positioned in the cylinder body and close to the upper end of the cylinder body; an air outlet is formed in the upper end of the cylinder; the lower end of the stock bin is communicated with an air inlet; through using centrifugal fan blade as driven mode, set up the cylinder manifold with centrifugal fan blade cooperation use again, can form inside and outside spiral air current in the barrel, and then make the dust realize the natural reflux under the effect of inside and outside spiral air current, can overcome the shortcoming of filtering and removing dust and cyclone dust removal.

Description

Fluidized bed

Technical Field

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

Background

A fluidized bed, also called a fluidized bed, is a device that performs a gas-solid reaction by passing a gas through a granular solid layer to bring solid particles into a suspended state. The fluidized bed is widely applied to the fields of chemical industry, medicine, food, boilers, mines and the like and is used as core equipment for the technological processes of drying, chemical reaction, combustion, granulation, coating and the like. In the process of working of the fluidized bed, a large amount of dust can be taken away when gas passes through a solid particle layer, the dust needs to be separated out through a filtering and separating device, otherwise, the yield can be reduced, and the environment is polluted. The traditional separation methods mainly comprise two methods, one is a filtration method, and the other is a cyclone separation method.

The main defects of the filtering method are two points, firstly, the filtering material is easy to block, and the dust accumulated on the filtering material needs to be cleaned in modes of vibration, back flushing and the like; secondly, the filter material is difficult to clean and replace.

The cyclone separation method is to separate dust carried away by air by using a cyclone separator, and has two main disadvantages: firstly, the separation efficiency is low, which causes a large amount of fine powder to flow out; secondly, the dust can not directly flow back to the fluidized bed, an additional reflux device is needed, the equipment investment is increased, and the working efficiency is reduced.

Disclosure of Invention

In order to solve the problems, the application aims to provide a fluidized bed which can realize natural dust backflow and overcome the defects of filtering dust removal and cyclone dust removal.

The fluidized bed of the present application comprises: the device comprises a cylinder, a centrifugal fan blade and a bin; the cylinder body is of a cylindrical container structure with a closed upper end and an open lower end; the lower end of the cylinder is provided with a bus bar, and the bus bar is provided with a first air port and a second air port; the first air ports are distributed close to the center of the bus bar, and the second air ports are distributed along the periphery of the bus bar; the cylinder body is communicated with the upper end of the storage bin through the bus board; the centrifugal fan blade is positioned in the cylinder body and close to the upper end of the cylinder body; an air outlet is formed in the upper end of the cylinder; the lower end of the storage bin is communicated with the air inlet.

Further, the fluidized bed further comprises: a driving shaft penetrating the upper end of the cylinder and extending to the inside of the cylinder; the driving shaft is positioned on the central axis of the cylinder body; the centrifugal fan blade is arranged on the driving shaft; the centrifugal fan blade is driven by the driving shaft to rotate.

Further, the fluidized bed further comprises: the bottom bin is arranged between the stock bin and the air inlet; one end of the bottom bin is communicated with the bin, and the other end of the bottom bin is communicated with the air inlet; and external air flow sequentially passes through the air inlet, the bottom bin and the storage bin to enter the barrel.

Further, the fluidized bed further comprises: the filter screen device is provided with a screen hole and is arranged at the bottom of the storage bin; the feed bin is communicated with the bottom bin through the filter screen device.

Optionally, the bus bar is circular, and the center of the bus bar is located on the central axis of the cylinder; a plurality of first air ports are formed in the bus bar and are uniformly distributed in an annular shape; the radius of the bus bar is smaller than that of the cylinder at the position of the bus bar, so that an annular second air port is formed between the periphery of the bus bar and the cylinder; a plurality of circumferential limiting bulges extend from the periphery of the bus bar; the plurality of circumferential limiting bulges are abutted against the inner wall of the cylinder body to fix the bus board.

Optionally, the bus bar includes: a circular plate and a hollow annular plate; the annular flat plate and the circular flat plate are arranged up and down correspondingly to form an annular first air port; the radius of the annular flat plate is smaller than that of the cylinder at the position of the bus bar, so that an annular second air port is formed between the periphery of the bus bar and the cylinder; a plurality of circumferential limiting bulges extend from the periphery of the annular flat plate; the plurality of circumferential limiting bulges are abutted against the inner wall of the cylinder body to fix the bus board.

Further, the fluidized bed further comprises: the air heating and filtering device is arranged at the air inlet and is used for heating and filtering external air flow and then sending the external air flow into the air inlet; the motor is arranged outside the upper end of the cylinder, is connected with the driving shaft and is used for driving the centrifugal fan blade; the terminal filter is communicated with the air outlet through a pipeline and is used for filtering air flow discharged by the air outlet; and the exhaust fan is communicated with the terminal filter through a pipeline and is used for providing exhaust power.

Further, the fluidized bed further comprises: an atomizing spray gun; the atomization spray gun is arranged at the upper end of the storage bin and is positioned below the confluence plate; the gun head of the atomizing spray gun faces the lower end of the storage bin.

Further, the fluidized bed further comprises: an atomizing spray gun; the atomizing spray gun is arranged on a filter screen device positioned at the lower end of the storage bin; the gun head of the atomizing spray gun faces the upper end of the storage bin.

Further, a guide cylinder is arranged around the atomizing spray gun; the guide cylinder is of a cylindrical structure which is through up and down; the gun head of the atomization spray gun is positioned in the cylindrical space of the guide cylinder; the bottom end of the guide cylinder keeps a preset distance from the screen device.

According to the technical scheme, a centrifugal fan blade is used as a driving mode, inner spiral air flow which is close to the axial center and upwards and outer spiral air flow which is downward along the inner wall of a cylinder are formed in the cylinder, and a confluence plate of a first air port and a second air port is further arranged at the lower end of the cylinder; the central distribution that the cylinder manifold is close to in first wind gap, the periphery of cylinder manifold is followed in the second wind gap distributes, the solid material granule that has fluidified in the feed bin (like the dust) rises along the interior spiral air current in first wind gap, the centrifugal force effect back edge outer spiral air current through centrifugal fan blade descends, and flow back to the feed bin through the second wind gap, and then realize the technical purpose of this application, and realize that the technical cost of this application is lower, technical scheme realizes that the degree of difficulty is lower, can effectively realize the backward flow of solid material granule (like the dust), have very strong practicality, the fluidized bed of this application can extensively apply to each scene, wide application scope.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 is a schematic structural diagram of a fluidized bed provided in one embodiment of the present application;

fig. 2 is a schematic structural diagram of a bus bar according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a bus bar according to another embodiment of the present application;

FIG. 4 is a schematic diagram of a fluidized bed provided in yet another embodiment of the present application;

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

Description of reference numerals:

1-a cylinder body; 2-a bus bar; 3-a storage bin; 4-centrifugal fan blades; 21-a first tuyere; 22-a second tuyere; 5-an air outlet; 6-air inlet; 7-a drive shaft; 8-bottom bin; 9-a screen device; 23-a first circumferential limit projection; 24-circular flat plate; 25-ring shaped flat plate; 26-a second circumferential limit projection; 10-an air heating and filtering device; 11-a motor; 12-a terminal filter; 13-an exhaust fan; 14-a first atomizing spray gun; 141-a bracket; 15-a second atomizing spray gun; 16-guide shell.

Detailed Description

The present application is described in further detail below with reference to the attached figures. The following description, with reference to the accompanying drawings, is provided to facilitate a comprehensive understanding of various embodiments of the application as defined by the claims and their equivalents. These embodiments include various specific details for ease of understanding, but these are to be considered exemplary only. Accordingly, those skilled in the art will appreciate that various changes and modifications may be made to the various embodiments described herein without departing from the scope and spirit of the present application. In addition, descriptions of well-known functions and constructions will be omitted herein for brevity and clarity.

The terms and phrases used in the following specification and claims are not to be limited to the literal meaning, but are merely for the clear and consistent understanding of the application. Accordingly, it will be appreciated by those skilled in the art that the description of the various embodiments of the present application is provided for illustration only and not for the purpose of limiting the application as defined by the appended claims and their equivalents.

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings in some embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is to be understood that the terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only, and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses 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 for modifying the corresponding elements without regard to order or importance, and are used only for distinguishing one element from another element without limiting the corresponding elements.

Example one

As shown in fig. 1, one embodiment of the present application provides a fluidized bed comprising: the device comprises a cylinder body 1, a centrifugal fan blade 4 and a stock bin 3; the cylinder body 1 is of a cylindrical container structure with a closed upper end and an open lower end, and the central axis of the cylinder body is vertical to the ground; the lower end of the cylinder body 1 is provided with a bus bar 2, and the bus bar 2 is provided with a first air port 21 and a second air port 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 inside the cylinder body 1 and close to the upper end of the cylinder body 1; an air outlet 5 is formed in the upper end of the cylinder body 1, and the air outlet 5 is positioned above the plane where the centrifugal fan blades 4 are positioned; the lower end of the stock bin 3 is communicated with an air inlet 6.

Introduction of working principle of the first embodiment: when the centrifugal fan blade 4 rotates, air below the centrifugal fan blade 4 flows upwards, and flows outwards along the edge of the centrifugal fan blade 4 to the inner wall of the cylinder 1 after being accelerated by the centrifugal fan blade 4 to form outer spiral airflow; the outer spiral air flow moves downwards while rotating to reach the collecting plate 2, one part of the air flow continuously moves downwards through a second air port 22 (such as a gap between the periphery of the collecting plate 2 and the inner wall of the cylinder 1) of the collecting plate 2, the other part of the air flow reduces the rotating radius, moves towards the center of the cylinder 1, changes the direction and moves upwards to form inner spiral air flow; the rotation directions of the inner spiral air flow and the outer spiral air flow are the same, and the translation directions are opposite. After the exhaust system is started, part of air flow flows out of the cylinder body 1 through the exhaust outlet 5, and the air flow flows into the cylinder body 1 through the air inlet 6 and the storage bin 3, so that solid particles (such as dust) in the storage bin 3 are boiled (fluidized). The air current carries solid particle (like the dust), pass cylinder manifold 2 through first wind gap 21, interior spiral air current of catchment, solid particle (like the dust) is under the effect of centrifugal force, outwards remove, after the inner wall of barrel 1 is reachd, downwards remove under the promotion of outer spiral air current, finally flow back down in feed bin 3 through the second wind gap 22 of cylinder manifold 2 (like the clearance of cylinder manifold 2's inner wall all around with barrel 1), thereby realize the separation backward flow of solid particle (like the dust), the technical cost of this embodiment is lower, technical scheme realizes the degree of difficulty lower, can effectively realize the backward flow of solid particle (like the dust), has very strong practicality, the fluidized bed of this application can extensively apply to each scene, application scope is wide.

As an alternative embodiment, the fluidized bed further comprises: a driving shaft 7, wherein the driving shaft 7 penetrates through the upper end of the cylinder 1 and extends to the inside of the cylinder 1; the driving shaft 7 is located on the central axis of the cylinder 1, that is, the central axis of the driving shaft 7 coincides with the central axis of the cylinder 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.

As an alternative embodiment, the fluidized bed further comprises: 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 bin 3, and the other end of the bottom bin is communicated with the air inlet 6; and 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.

As an alternative embodiment, the fluidized bed further comprises: 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.

As shown in fig. 2, as an alternative embodiment, the bus plate 2 is circular (for example, a circular flat plate 24), and the center of the bus plate 2 is located on the central axis of the cylinder 1; a plurality of first air ports 21 are formed in the bus bar 2 and are uniformly distributed in an annular shape; in addition, the first air ports 21 are distributed around the center of the bus bar 2; 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, and specifically, the size of a gap between the periphery of the bus bar 2 and the inner wall of the cylinder 1, namely the size of the second air opening 22, is 2% -15% of the radius of the cylinder 1.

As an optional embodiment, a plurality of first circumferential limiting protrusions 23 extend from the periphery of the bus plate 2; the plurality of first circumferential limiting protrusions 23 abut against the inner wall of the cylinder body 1 to fix the bus bar 2. Of course, the bus bar 2 may be fixed in the cylinder 1 by other conceivable means, such as a suspension, and the like, which is not limited herein.

As an alternative embodiment, as shown in fig. 3, 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, and an annular gap between the two flat plates naturally forms an annular first air port 21; wherein, the circular flat plate 24 is fixed on the annular flat plate 25 through a fixing bracket, and the radius of the circular flat plate 24 is not less than that of the circular hollow area of the annular flat plate 25; the radius of the annular flat plate 25 is smaller than that of the cylinder 1 at the position of the bus bar 2, so that an annular second air port 22 is formed between the periphery of the bus bar 2 and the cylinder 1.

As an alternative embodiment, a plurality of second circumferential limiting protrusions 26 are extended from the periphery of the annular flat plate 25; the plurality of second circumferential stopper projections 26 abut on the inner wall of the cylinder 1 to fix the bus bar 2. The distance between the outer edge of the first air port 21 and the periphery of the bus plate 2 is 8% -40% of the radius of the cylinder 1. Of course, the bus bar 2 may be fixed in the cylinder 1 by other conceivable means, such as a suspension, and the like, which is not limited herein.

According to the technical scheme of the first embodiment of the application, a centrifugal fan blade is used as a driving mode, an upward inner spiral air flow close to the axial center and a downward outer spiral air flow along the inner wall of the cylinder body 1 are formed in the cylinder body 1, and a confluence plate 2 of a first air port 21 and a second air port 22 is further arranged at the lower end of the cylinder body 1; first wind gap 21 is close to the central distribution of cylinder manifold 2, second wind gap 22 distributes along the periphery of cylinder manifold 2, the solid material granule that has fluidified in the feed bin 3 (like the dust) rises along the interior spiral air current of first wind gap 21, the outer spiral air current that follows after the centrifugal force effect of centrifugal fan blade 4 descends, and flow back feed bin 3 through second wind gap 22, and then realize the technical purpose of this application, and realize that the technical cost of this application is lower, technical scheme realizes that the degree of difficulty is lower, can effectively realize the backward flow of solid material granule (like the dust), have very strong practicality, the fluidized bed of this application can extensively apply to each scene, application scope is wide.

Example two

According to another aspect of the present application, an embodiment two is provided on the basis of the embodiment one in the present application, and on the basis of the function of realizing the backflow of the solid particles (such as dust), the fluidized drying function is further realized, so that the fluidized drying device can be widely applied to the process occasions requiring fluidized drying.

On the basis of the first embodiment, the fluidized bed further comprises: the air heating and filtering device 10 is arranged at the air inlet 6 and 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 cylinder 1, connected with the driving shaft 7 and used for driving the centrifugal fan blade 4; a terminal filter 12, which 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.

Introduction of the working principle of the second embodiment: firstly, starting a power system of the equipment, driving a driving shaft 7 and a centrifugal fan blade 4 to rotate by a motor 11, enabling air below the centrifugal fan blade 4 to flow upwards, accelerating by the centrifugal fan blade 4, and then flowing outwards to the inner wall of a cylinder 1 along the edge of the fan blade to form an external spiral air flow; the outer spiral air flow moves downwards while rotating to reach the collecting plate 2, one part of the air flow continuously moves downwards through a second air port 22 (such as a gap between the periphery of the collecting plate 2 and the inner wall of the cylinder 1) of the collecting plate 2, the other part of the air flow reduces the rotation radius, moves towards the center of the cylinder 1, changes the direction and moves upwards to form inner spiral air flow; the rotation directions of the inner spiral air flow and the outer spiral air flow are the same, and the translation directions are opposite. After the fan 13 that starts to exhaust, the inside minute air current of barrel 1 passes through air exit 5 under the effect of negative pressure, behind exhaust pipe and the terminal filter 12, and the discharge is outdoor, and outside air passes through air heating filter equipment 10, air intake 6, end storehouse 8, sieve device 9 (like the screen cloth), feed bin 3 inflow barrel 1 in proper order for the material on the sieve device 9 (like the screen cloth) becomes the boiling state. The airflow carries solid particles (such as dust) in the material, passes through the confluence plate 2 through the first air port 21 and is converged into the inner spiral airflow, the solid particles (such as dust) move outwards under the action of centrifugal force and then move downwards under the pushing of the outer spiral airflow after reaching the inner wall of the cylinder 1, and finally flow back into the bin 3 downwards through the second air port 22 (such as a gap between the outer edge of the confluence plate 2 and the inner wall of the cylinder 1), meanwhile, the generated hot airflow enters the chamber (bin 3) through the air inlet 6 under the action of the air heating and filtering device 10, so that the solid particles (such as dust) are boiled and dried while flowing back, the separation efficiency is high, the dust can directly flow back into the bin 3, the technical cost is low, the technical scheme is low in implementation difficulty, and the backflow and drying of the solid particles (such as dust) can be effectively realized, has strong practicability.

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

EXAMPLE III

According to another aspect of the present application, a third embodiment is provided on the basis of the second embodiment of the present application, and on the basis of the functions of realizing the backflow of solid particles (such as dust) and the fluidized drying, the further granulation function is realized, so that the method can be widely applied to the process occasions requiring the fluidized drying.

On the basis of the second embodiment, the fluidized bed further comprises: a first atomizing spray gun 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; the first atomizing lance 14 is fixed inside the chamber of the silo 3 by means of a bracket 141.

The working principle of the third embodiment is described as follows: firstly, starting a power system of the equipment, driving a driving shaft 7 and a centrifugal fan blade 4 to rotate by a motor 11, enabling air below the centrifugal fan blade 4 to flow upwards, accelerating by the centrifugal fan blade 4, and then flowing outwards to the inner wall of a cylinder 1 along the edge of the fan blade to form an external spiral air flow; the outer spiral air flow moves downwards while rotating to reach the collecting plate 2, one part of the air flow continuously moves downwards through a second air port 22 (such as a gap between the periphery of the collecting plate 2 and the inner wall of the cylinder 1) of the collecting plate 2, the other part of the air flow reduces the rotation radius, moves towards the center of the cylinder 1, changes the direction and moves upwards to form inner spiral air flow; the rotation directions of the inner spiral air flow and the outer spiral air flow are the same, and the translation directions are opposite. After the fan 13 that starts to exhaust, the inside minute air current of barrel 1 passes through air exit 5 under the effect of negative pressure, behind exhaust pipe and the terminal filter 12, and the discharge is outdoor, and outside air passes through air heating filter equipment 10, air intake 6, end storehouse 8, sieve device 9 (like the screen cloth), feed bin 3 inflow barrel 1 in proper order for the material on the sieve device 9 (like the screen cloth) becomes the boiling state. The air current carries the material, the solid particle (such as dust), pass the cylinder manifold 2 through the first wind gap 21, converge into the inner spiral air current, the solid particle (such as dust) moves outwards under the influence of centrifugal force, after reaching the inner wall of the cylinder 1, move downwards under the push of the outer spiral air current, finally flow back to the feed bin 3 downwards through the second wind gap 22 (such as the clearance between the outer edge of the cylinder manifold 2 and the inner wall of the cylinder 1), the first atomization spray gun 14 is equipped with at the top of the feed bin 3 at the same time, used for spraying out the adhesive or the liquid medicine, make the material boiled in the cavity agglomerate into the tiny particle, at the same time, under the influence of air heating filter equipment 10, the hot gas flow produced passes the air inlet 6, enter the cavity, make the material boiled while agglomerating dry. As the spraying amount of the binding agent is increased, the fine particles are gradually increased, thereby realizing the function of one-step granulation.

Example four

According to another aspect of the present application, an example four is provided on the basis of the example two in the present application, and the function of coating the material is further realized on the basis of realizing the function of refluxing the solid particles (such as dust).

As an alternative embodiment, the fluidized bed further comprises: a second atomizing spray gun 15; the second atomizing spray gun 15 is arranged on the filter screen device 9 positioned at the lower end of the storage bin 3; the head of the second atomizing spray gun 15 faces the upper end of the storage bin 3.

As an alternative embodiment, a guide shell 16 is arranged around the second atomizing spray gun 15; the guide cylinder 16 is of a cylindrical structure which is through up and down; the gun head of the second atomizing spray gun 15 is positioned in the cylindrical space of the guide cylinder 16; the bottom end of the guide cylinder 16 is kept at a predetermined distance from the screen device 9.

Firstly, starting a power system of the equipment, driving a driving shaft 7 and a centrifugal fan blade 4 to rotate by a motor 11, enabling air below the centrifugal fan blade 4 to flow upwards, accelerating by the centrifugal fan blade 4, and then flowing outwards to the inner wall of a cylinder 1 along the edge of the fan blade to form an external spiral air flow; the outer spiral air flow moves downwards while rotating to reach the collecting plate 2, one part of the air flow continuously moves downwards through a second air port 22 (such as a gap between the periphery of the collecting plate 2 and the inner wall of the cylinder 1) of the collecting plate 2, the other part of the air flow reduces the rotation radius, moves towards the center of the cylinder 1, changes the direction and moves upwards to form inner spiral air flow; the rotation directions of the inner spiral air flow and the outer spiral air flow are the same, and the translation directions are opposite. After the fan 13 that starts to exhaust, the inside minute air current of barrel 1 passes through air exit 5 under the effect of negative pressure, behind exhaust pipe and the terminal filter 12, and the discharge is outdoor, and outside air passes through air heating filter equipment 10, air intake 6, end storehouse 8, sieve device 9 (like the screen cloth), feed bin 3 inflow barrel 1 in proper order for the material on the sieve device 9 (like the screen cloth) becomes the boiling state. The air flow carries solid particles (such as dust) in the material, the solid particles (such as dust) pass through the confluence plate 2 through the first air port 21 and are converged into the inner spiral air flow, the solid particles (such as dust) move outwards under the action of centrifugal force and reach the inner wall of the barrel 1, then the solid particles move downwards under the pushing of the outer spiral air flow, finally the solid particles flow back into the bin 3 downwards through the second air port 22 (such as a gap between the outer edge of the confluence plate 2 and the inner wall of the barrel 1), meanwhile, one or more second atomizing spray guns 15 are arranged on a filter device 9 (such as a screen) and are used for spraying out coating liquid, a guide cylinder 16 is arranged around each second atomizing spray gun 15, a certain distance is kept between the bottom of the guide cylinder 16 and the filter device 9 (such as a screen) to divide the bottom of the bin 3 into two parts, the outer part of the guide cylinder 16 is called an expansion bin, the inner part of the guide, Under the action of the circumferential centrifugal force and the friction force, materials in the expansion bin and the conveying bin form small internal circulating motion, so that the coating liquid sprayed out of the second atomizing spray gun 15 is uniformly coated on material particles, and meanwhile, under the action of the air heating and filtering device 10, the generated hot air flows through the air inlet 6 to coat and dry the materials in the cavity, so that the function of coating the materials is realized.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or means recited in the apparatus claims may also be implemented by one unit or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.

Claims

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).