A stirring system for fluidized bed and stirring method thereof

Abstract

The present application relates to the technical fields of fluidized bed, and particularly relates to a stirring system for fluidized bed and a stirring method thereof; the present application provides a stirring system for fluidized bed, comprising: a material pot, which is conical; a bottom plate, which is horizontally fixed at the bottom of the material pot, and is provided with a plurality of guide grooves along the radial direction; a stirring device, which is rotationally arranged in the material pot; wherein, after the hot air enters the material pot from the bottom plate, the guide grooves are suitable for guiding the hot air to rotate spirally in the material pot; the movable end of the stirring part rotates circumferentially to stir and break the caked material; through the arrangement of the stirring device, when the air flow blows the material in the material pot, the effect of stabilizing the air flow and uniformly stirring the material is achieved.

Description

Technical Field

[0001] This invention relates to the field of fluidized bed technology, and more specifically to a stirring system and stirring method for fluidized beds. Background Technology

[0002] Fluidized bed equipment has been used as a drying device in the pharmaceutical industry for many years. With the improvement of fluidized bed equipment, it is increasingly used for industrial granulation, preparation of microcapsules, coating, mixing and other operations. These improvements make fluidized bed equipment suitable for a variety of applications, which not only reduces energy consumption but also improves product performance.

[0003] After powdered materials enter the fluidized bed, the hot air conveyed by the fluidized bed is used to dry the moisture on the materials. However, the powdered materials tend to clump together on the inner wall of the fluidized bed, which not only affects the drying of the fluidized bed, but also affects the conveying effect of the materials in the fluidized bed.

[0004] Therefore, how to achieve uniform drying of materials in a fluidized bed is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to provide a stirring system and stirring method for a fluidized bed.

[0006] To solve the above-mentioned technical problems, the present invention provides a stirring system for a fluidized bed, comprising:

[0007] A material pot, wherein the material pot is conical in shape;

[0008] A bottom plate, which is horizontally fixed to the bottom of the material pot, and the bottom plate is provided with a plurality of guide grooves along the radial direction;

[0009] A stirring device, which is rotatably mounted inside the material pot;

[0010] Among them, after the hot air enters the material pot from the bottom plate, the guide groove is adapted to guide the hot air to rotate spirally in the material pot;

[0011] The moving end of the agitator rotates circumferentially to agitate and break up agglomerated materials.

[0012] Preferably, the angle between the guide channel and the horizontal plane is in the range of 15°-30°.

[0013] Preferably, the stirring device includes: a rotating shaft, which is rotatably disposed inside the material pot and passes through the bottom plate;

[0014] A positioning frame, which is vertically fixed to the outer wall of the rotating shaft and is hollow inside;

[0015] A scraping block is slidably disposed within the positioning frame, and the outer wall of the scraping block is adapted to abut against the inner wall of the material pot;

[0016] An adjusting block, one adjusting block corresponding to one scraping block, and the adjusting block is vertically and vertically mounted on the positioning frame;

[0017] When the adjusting block moves upward, it is adapted to push the scraping block outward until it abuts against the inner wall of the material pot;

[0018] The adjusting block moves downward, and the adjusting block is adapted to abut against a positioning frame located below.

[0019] Preferably, a lifting plate is fixed on each side of the outer wall of the rotating shaft, and the lifting plate is adapted to move vertically up and down relative to the rotating shaft.

[0020] Several connecting rods are fixed to the side wall of the lifting plate, and one connecting rod corresponds to one adjusting block.

[0021] When the lifting plate moves vertically up and down, it is suitable for driving the adjusting block to move vertically up and down synchronously.

[0022] Preferably, a tension spring is fixed to one end of the scraping block near the rotating shaft, and the other end of the tension spring is fixed to the outer wall of the rotating shaft. The tension spring is adapted to pull the scraping block to move in the direction of the rotating shaft.

[0023] Preferably, each of the adjusting blocks has a positioning block fixed at its lower end, with the positioning block facing the base plate.

[0024] Preferably, the scraping block has a groove that matches the positioning block. When the positioning block is inserted into the groove, the bottom wall of the adjusting block is adapted to abut against the top wall of a scraping block located below.

[0025] Preferably, the scraping block has a first inclined surface on the side near the adjusting block;

[0026] The adjusting block has a second inclined surface on the side near the scraping block, and the second inclined surface is adapted to abut against the first inclined surface.

[0027] Preferably, a positioning plate is vertically fixed to the outer wall of the rotating shaft. The positioning plate is located below the adjusting block. When the positioning block moves vertically downward, the positioning block is adapted to be inserted into the positioning plate.

[0028] On the other hand, the present invention also provides a stirring method for a fluidized bed stirring system, comprising the following steps:

[0029] After the granular materials are placed in the material pot, a bridging phenomenon is formed between the materials;

[0030] Airflow flows upward from the bottom plate through the guide groove. The airflow is guided by the guide groove to form a spiral upward airflow in the material pot, and blows the material on the bottom plate to move upward in a spiral shape.

[0031] The moving end of the stirring section rotates circumferentially, which is suitable for guiding the airflow in the material pot to flow smoothly and evenly;

[0032] When the lifting plate moves vertically upward, the adjusting block is adapted to squeeze the scraping block, causing it to slide outward until the scraping block abuts against the inner wall of the material pot. The scraping block is adapted to clean the material adhering to the inner wall of the material pot.

[0033] The lifting plate moves vertically downward until the positioning block is inserted into the groove. At this time, the gap between two adjacent scraping blocks is sealed by the adjusting block, and the adjusting block and the positioning frame form a whole.

[0034] When the rotating shaft drives the positioning frame to rotate circumferentially, the positioning frame can continue to blow the material in the material pot upward.

[0035] The beneficial effects of the present invention are that the stirring system for fluidized beds of the present invention, through the setting of the stirring device, can stabilize the airflow and make the material uniformly stirred when the airflow blows the material in the material pot; and after the adjusting block forms the positioning frame into a whole, the circumferential rotation of the positioning frame can accelerate the flow of material to the top of the material pot, thereby improving the working efficiency.

[0036] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0037] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0038] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 This is a perspective view of a preferred embodiment of a stirring system for a fluidized bed according to the present invention;

[0040] Figure 2 This is a perspective view of the stirring device of the present invention;

[0041] Figure 3 This is an internal perspective view of the stirring device of the present invention;

[0042] Figure 4 This is a longitudinal cross-sectional view of the stirring device of the present invention;

[0043] Figure 5 This is a schematic diagram of the state of the material in the material pot according to the present invention;

[0044] Figure 6 This is a longitudinal cross-sectional view of the base plate of the present invention.

[0045] In the picture:

[0046] 1. Material pot;

[0047] 2. Base plate; 20. Flow guide channel;

[0048] 3. Stirring device; 31. Rotating shaft; 32. Positioning frame; 33. Scraper block; 34. Adjusting block; 35. Lifting plate; 36. Connecting rod; 37. Positioning block; 38. Groove; 39. First inclined surface; 40. Second inclined surface; 41. Positioning plate. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Example 1, as Figures 1 to 6As shown, this invention provides a stirring system for a fluidized bed, comprising: a material pot 1, which is conical in shape; the material pot 1 is fixed to the bottom of a fluidized bed device, and the bottom of the material pot 1 is connected to an air supply system adapted to deliver hot air into the fluidized bed device; a bottom plate 2, which is horizontally fixed to the bottom of the material pot 1, and the bottom plate 2 has a plurality of guide grooves 20 radially formed; after the hot air flows into the material pot 1 through the guide grooves 20, the guide grooves 20 are adapted to guide the hot air to spirally rotate within the material pot 1; and a stirring device 3, which is rotatably disposed within the material pot 1; the rotation direction of the stirring device 3 is consistent with the direction of the air outlet of the guide grooves 20, wherein after the hot air enters the material pot 1 from the bottom plate 2, the guide grooves 20 are adapted to guide the hot air to spirally rotate within the material pot 1; the movable end of the stirring part rotates circumferentially to stir and break up agglomerated materials. By setting the stirring device 3, when the airflow blows the material in the material pot 1, it can stabilize the airflow and make the material evenly stirred; and after the adjusting block 34 forms the positioning frame 32 into a whole, the circumferential rotation of the positioning frame 32 can accelerate the flow of material to the top of the material pot 1, thus improving work efficiency.

[0051] Reference Appendix Figure 6 The guide channel 20 extends radially along the base plate 2, and the longitudinal section of the guide channel 20 forms an inclined angle with the horizontal plane. Preferably, the angle between the guide channel 20 and the horizontal plane is in the range of 15°-30°.

[0052] Reference Appendix Figure 2 and Figure 3The stirring device 3 includes: a rotating shaft 31, which is rotatably disposed inside the material pot 1 and passes through the bottom plate 2; a drive motor is fixed to the bottom of the bottom plate 2, and the rotating shaft 31 is fixed to the movable end of the drive motor, the drive motor being adapted to drive the rotating shaft 31 to rotate circumferentially; the rotating shaft 31 is adapted to drive the positioning frame 32 to rotate synchronously when rotating circumferentially. The positioning frame 32 is vertically fixed to the outer wall of the rotating shaft 31, and the interior of the positioning frame 32 is hollow; there are multiple positioning frames 32, and the length of the multiple positioning frames 32 gradually decreases from top to bottom. A scraping block 33 is slidably disposed within the positioning frame 32, and its outer wall is adapted to abut against the inner wall of the material pot 1. An adjusting block 34 corresponds to one scraping block 33, and is vertically and vertically mounted on the positioning frame 32. When the adjusting block 34 moves upward, it is adapted to push the scraping block 33 outward; when the adjusting block 34 moves downward, the scraping block 33, under the elastic force of a tension spring, can retract into the positioning frame 32 towards the rotation shaft 31. Specifically, when the adjusting block 34 moves upward, it is adapted to push the scraping block 33 outward until it abuts against the inner wall of the material pot 1; when the adjusting block 34 moves downward, it is adapted to abut against a positioning frame 32 located below it.

[0053] Reference Appendix Figure 3 and Figure 4 A lifting plate 35 is fixed to each of the two sides of the outer wall of the rotating shaft 31. The lifting plate 35 is adapted to move vertically up and down relative to the rotating shaft 31. A positioning ring is sleeved on the outer wall of the rotating shaft 31, and the two lifting plates 35 are respectively fixed on the positioning ring. The positioning ring is adapted to pass through the base plate 2. A cylinder is fixed to the bottom of the base plate 2. An annular groove is opened in the bottom wall of the positioning ring. The movable end of the cylinder is adapted to be inserted into the annular groove. The positioning ring is adapted to rotate circumferentially relative to the cylinder. When the rotating shaft 31 rotates, it is adapted to drive the lifting plate 35 to rotate synchronously. The cylinder is adapted to drive the positioning ring to move vertically up and down. Several connecting rods 36 are fixed to the side wall of the lifting plate 35, and one connecting rod 36 corresponds to one adjusting block 34. When the lifting plate 35 moves vertically up and down, it is adapted to drive the adjusting block 34 to move vertically up and down synchronously.

[0054] Preferably, a tension spring is fixed to one end of the scraping block 33 near the rotating shaft 31, and the other end of the tension spring is fixed to the outer wall of the rotating shaft 31. The tension spring is adapted to pull the scraping block 33 to move in the direction of the rotating shaft 31. With the tension spring, when the adjusting block 34 moves upward, the pushing force of the adjusting block 34 on the scraping block 33 is greater than the elastic force of the tension spring. The adjusting block 34 is adapted to push the scraping block 33, causing it to slide outward until the outer wall of the scraping block 33 abuts against the inner wall of the material pot 1. The rotating shaft 31 drives the scraping block 33 to rotate circumferentially. The scraping block 33 is adapted to scrape the material on the inner wall of the material pot 1. At the same time, the contact between the scraping block 33 and the inner wall of the material pot 1 also helps to break up any clumps of material adhering to the inner wall of the material pot 1.

[0055] Reference Appendix Figure 3 Each adjusting block 34 has a positioning block 37 fixed at its lower end, with the positioning block 37 facing the base plate 2. The positioning block 37 is located at one end of the adjusting block 34 near the rotating shaft 31; a groove 38 adapted to the positioning block 37 is formed on the scraping block 33, and when the positioning block 37 is inserted into the groove 38, the bottom wall of the adjusting block 34 is adapted to abut against the top wall of the scraping block 33 located below. The height of the adjusting block 34 is greater than the distance between two adjacent positioning frames 32. When the adjusting block 34 moves downward, the scraping block 33 moves towards the direction of the rotating shaft 31 under the elastic force of the tension spring. The positioning block 37 is adapted to be inserted into a groove 38 located below, until the bottom wall of the adjusting block 34 abuts against the upper arm of the scraping block 33 located below. At this time, the adjusting block 34 and the positioning frame 32 form a whole. At this time, when the rotating shaft 31 drives the positioning frame 32 to rotate circumferentially, the circumferential rotation of the positioning frame 32 can increase the rotation speed of the airflow in the material pot 1. The positioning frame 32 is adapted to accelerate the upward flow of the material in the material pot 1.

[0056] Furthermore, the scraping block 33 has a first inclined surface 39 on the side near the adjusting block 34; the adjusting block 34 has a second inclined surface 40 on the side near the scraping block 33, and the second inclined surface 40 is adapted to abut against the first inclined surface 39. The first inclined surface 39 and the second inclined surface 40 are parallel to each other. When the adjusting block 34 moves upward, the first inclined surface 39 is adapted to push against the second inclined surface 40, so that the scraping block 33 can move outward.

[0057] Preferably, a positioning plate 41 is vertically fixed to the outer wall of the rotating shaft 31. The positioning plate 41 is located below the adjusting block 34. When the positioning block 37 moves vertically downward, the positioning block 37 is adapted to insert into the positioning plate 41. The positioning plate 41 serves to limit the movement of the lowermost adjusting block 34.

[0058] Example 2: Based on Example 1, this example also provides a stirring method for a fluidized bed stirring system, including a fluidized bed stirring system as described in Example 1. The specific structure is the same as in Example 1, and will not be repeated here. The specific stirring method for the fluidized bed stirring system is as follows:

[0059] After the granular material is placed in the material pot 1, a bridging phenomenon is formed between the materials;

[0060] Airflow flows upward from the bottom plate 2 through the guide groove 20. The airflow is guided by the guide groove 20 to form a spiral upward airflow in the material pot 1, and blows the material on the bottom plate 2 to move upward in a spiral shape.

[0061] The moving end of the stirring section rotates circumferentially, which is suitable for guiding the airflow in the material pot 1 to flow smoothly and evenly;

[0062] When the lifting plate 35 moves vertically upward, the adjusting block 34 is adapted to squeeze the scraping block 33, causing it to slide outward until the scraping block 33 abuts against the inner wall of the material pot 1. The scraping block 33 is adapted to clean the material adhering to the inner wall of the material pot 1.

[0063] The lifting plate 35 moves vertically downward until the positioning block 37 is inserted into the groove 38. At this time, the gap between two adjacent scraping blocks 33 is sealed by the adjusting block 34. The adjusting block 34 and the positioning frame 32 form a whole.

[0064] When the rotating shaft 31 drives the positioning frame 32 to rotate circumferentially, the positioning frame 32 can continue to blow the material in the material pot 1 upward.

[0065] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0066] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0067] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A stirring system for a fluidized bed, characterized in that, include: Material pot (1), the material pot (1) is conical; The bottom plate (2) is horizontally fixed to the bottom of the material pot (1), and the bottom plate (2) is provided with a plurality of guide grooves (20) in the radial direction. A stirring device (3) is rotatably disposed inside the material pot (1); Among them, after the hot air enters the material pot (1) from the bottom plate (2), the guide groove (20) is adapted to guide the hot air to rotate in a spiral within the material pot (1); The moving end of the stirring device (3) rotates circumferentially to stir and break up the agglomerated material; The stirring device (3) includes: a rotating shaft (31), which is rotatably disposed inside the material pot (1) and passes through the bottom plate (2). Positioning frame (32), which is vertically fixed to the outer wall of the rotating shaft (31), and the positioning frame (32) is hollow inside; Scraping block (33), the scraping block (33) is slidably disposed in the positioning frame (32), and the outer wall of the scraping block (33) is adapted to abut against the inner wall of the material pot (1); Adjustment block (34), one adjustment block (34) corresponds to one scraping block (33), and the adjustment block (34) is raised and lowered on the positioning frame (32); When the adjusting block (34) moves upward, the adjusting block (34) is adapted to push the scraping block (33) outward to abut against the inner wall of the material pot (1); The adjusting block (34) moves downward and is adapted to abut against a positioning frame (32) located below; A lifting plate (35) is fixed on each side of the outer wall of the rotating shaft (31), and the lifting plate (35) is adapted to move vertically up and down relative to the rotating shaft (31); The lifting plate (35) has several connecting rods (36) fixed on its side wall, and one connecting rod (36) corresponds to one adjusting block (34). When the lifting plate (35) moves vertically up and down, it is suitable for driving the adjusting block (34) to move vertically up and down synchronously. Each of the adjustment blocks (34) has a positioning block (37) fixed at its lower end, and the positioning block (37) faces the base plate (2); The scraping block (33) has a groove (38) that is adapted to the positioning block (37). When the positioning block (37) is inserted into the groove (38), the bottom wall of the adjusting block (34) is adapted to abut against the top wall of the scraping block (33) located below.

2. The stirring system for a fluidized bed as described in claim 1, characterized in that: The angle between the guide channel (20) and the horizontal plane is in the range of 15°-30°.

3. The stirring system for a fluidized bed as described in claim 2, characterized in that: A tension spring is fixed to one end of the scraping block (33) near the rotating shaft (31), and the other end of the tension spring is fixed to the outer wall of the rotating shaft (31). The tension spring is adapted to pull the scraping block (33) to move in the direction of the rotating shaft (31).

4. The stirring system for a fluidized bed as described in claim 3, characterized in that: The scraping block (33) has a first inclined surface (39) on the side near the adjusting block (34); The adjusting block (34) has a second inclined surface (40) on the side near the scraping block (33), and the second inclined surface (40) is adapted to abut against the first inclined surface (39).

5. The stirring system for a fluidized bed as described in claim 4, characterized in that: A positioning plate (41) is vertically fixed to the outer wall of the rotating shaft (31). The positioning plate (41) is located below the adjusting block (34). When the positioning block (37) moves vertically downward, the positioning block (37) is suitable for inserting into the positioning plate (41).

6. A stirring method for a fluidized bed stirring system, characterized in that, Using the fluidized bed stirring system as described in claim 5 includes the following steps: When granular materials are placed in the material pot (1), a bridging phenomenon is formed between the materials; Airflow flows upward from the bottom plate (2) through the guide groove (20). The airflow is guided by the guide groove (20) to form a spiral upward airflow in the material pot (1) and blow the material on the bottom plate (2) upward in a spiral shape. The moving end of the stirring device (3) rotates circumferentially, which is suitable for guiding the air flow in the material pot (1) to flow smoothly and evenly; When the lifting plate (35) moves vertically upward, the adjusting block (34) is adapted to squeeze the scraping block (33) so that it slides outward until the scraping block (33) abuts against the inner wall of the material pot (1). The scraping block (33) is adapted to clean the material adhering to the inner wall of the material pot (1). The lifting plate (35) moves vertically downward until the positioning block (37) is inserted into the groove (38). At this time, the gap between two adjacent scraping blocks (33) is sealed by the adjusting block (34). The adjusting block (34) and the positioning frame (32) form a whole. When the rotating shaft (31) drives the positioning frame (32) to rotate circumferentially, the positioning frame (32) can continue to blow the material in the material pot (1) upward.

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