Fluidized bed air uniformizing structure and fluidized bed granulating device

Abstract

The utility model discloses an air equalizing structure of a fluidized bed, which comprises an air chamber connected with the bottom of a material chamber, a distribution net for bearing materials is arranged in the material chamber, a conical guide cylinder is arranged in the air chamber, the conical guide cylinder is positioned below the distribution net, a guide hole is arranged on the conical guide cylinder, and the air chamber is communicated with an air inlet component. The air-drying device has the advantages that the structure is simple, the difference between the air volume, the air pressure and the temperature of the middle and the edge of the distribution net is reduced, and the air-drying uniformity is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of food and drug packaging, and particularly relates to a fluidized bed air distribution structure and a fluidized bed granulation device. Background Art

[0002] The fluidized bed granulation technology is a process of spraying atomized liquid materials onto the surface of granular materials in a fluidized state in a fluidized bed, and enabling the liquid materials to agglomerate on the surface of the granules under the action of coating and agglomeration. Since its industrialization in 1965, it has been widely used in industrial production fields such as chemical industry, food, and pharmaceuticals.

[0003] The fluidized bed granulation dryer is also known as the fluidized bed granulation dryer, fluidized bed granulator, fluidized bed spray granulator, fluidized bed spray granulation dryer, spray fluidized bed granulator, spray fluidized bed granulation dryer, etc. Dry hot air is blown into the fluidized bed granulation dryer from below the bottom fluidized bed body to dry the granules in the equipment. Due to the mutual cooperation between the hot air generating equipment and the dryer, the microporous bed body of the dryer is set at a relatively low position, and a drainage channel needs to be set at the bottom of the dryer. In addition, when the air inlet channel blows directly from the bottom, it will directly disturb the bed body. Therefore, the dry hot air usually enters from the side of the bottom of the fluidized bed, and when the air enters the fluidized bed and reaches the bed body, the following problems will occur:

[0004] 1) The air volume and air pressure at the front, rear, left, and right edges of the air chamber are very different from those when the air passes through the middle of the material chamber, resulting in a large difference in the air volume and air pressure of the materials in the material chamber contacting the hot air;

[0005] 2) The problem of a large temperature difference between the center temperature and the edge temperature of the material chamber, and the temperature difference between the temperature T1 of the material in the center part of the material chamber and the temperature T2 of the material in the peripheral part reaches 5°C - 7°C.

[0006] Due to the above reasons, the final moisture of the finished product materials is uneven, some materials are over-dried, and some materials may not meet the final moisture requirements. To solve this problem, the existing solutions usually adopt a complex gas distributor. For example, as shown in CN117889614A, a complex distribution pipeline is provided at the bottom of the fluidized bed, so that the gas input from the gas supply pipeline is evenly distributed at the bottom of the fluidized bed. However, this type of method makes the equipment structure complex, and the micropores on the distribution pipeline are easily blocked by particles and dust, making it difficult to maintain and clean. Summary of the Utility Model

[0007] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art, and provide a fluidized bed air distribution structure and a fluidized bed granulation device with a simple structure, which can reduce the temperature difference caused by uneven air volume and air pressure between the middle and the edge of the distribution network, and improve the uniformity of air drying.

[0008] To solve the above technical problems, the present utility model adopts the following technical solutions:

[0009] A fluidized bed air distribution structure includes an air chamber connected to the bottom of the material chamber. A distribution net for carrying materials is provided in the material chamber. A conical guide cylinder is provided in the air chamber. The conical guide cylinder is located below the distribution net. The conical guide cylinder is provided with guide holes, and the air chamber is communicated with an air inlet assembly.

[0010] As a further improvement of the above technical solution:

[0011] The bottom of the material chamber is detachably provided with a mounting rack, and the conical guide cylinder is arranged on the mounting rack, and the tip of the conical guide cylinder faces the distribution net.

[0012] An installation groove is provided between the mounting rack and the material chamber, and the distribution net is arranged in the installation groove.

[0013] A sealing ring is provided between the distribution net and the mounting rack.

[0014] The top of the mounting rack is detachably provided with a fixing seat, and the distribution net is clamped between the fixing seat and the mounting rack.

[0015] The fixing seat is threadedly connected to the conical guide cylinder, and a lifting handle is provided on the fixing seat.

[0016] There are multiple guide holes, and the multiple guide holes are uniformly arranged along the circumferential and generatrix directions of the conical guide cylinder.

[0017] The guide holes face the outside of the distribution net.

[0018] First reinforcing ribs are provided between the barrel walls of the conical guide cylinder, and second reinforcing ribs are provided between the outer side of the barrel wall and the mounting rack.

[0019] The air inlet assembly includes an air inlet square pipe and a round-to-square docking pipe. One end of the round-to-square docking pipe is connected to the front air inlet round pipe, and the other end is connected to the air inlet square pipe. The air inlet square pipe is located below the conical guide cylinder.

[0020] The present utility model also provides a fluidized bed granulation device having the above fluidized bed air distribution structure.

[0021] Furthermore, the fluidized bed granulation device further includes a hot air generating device communicated through the air inlet assembly and a cyclone filtration system communicated with the material chamber.

[0022] Compared with the prior art, the advantages of the present utility model are:

[0023] The air distribution structure of the fluidized bed disclosed by the present utility model is such that the ventilation component feeds air into the air chamber. The conical structure of the conical guide cylinder is used to gather and guide the air, enabling the air to blow to the middle and edges of the distribution net, achieving an air distribution effect, reducing the differences in air volume, air pressure, and temperature between the middle and edges of the distribution net, improving the uniformity of air drying, and without the need to set up complex air distribution pipes. The structure is simple and reduces the risk of pipe blockage. The fluidized bed granulation device disclosed by the present utility model can prepare particles with uniform dryness. Brief Description of the Drawings

[0024] Figure 1 is the front view structural schematic diagram of the air distribution structure of the fluidized bed of the present utility model.

[0025] Figure 2 is Figure 1 the enlarged view at position B in

[0026] Figure 3 is Figure 1 the enlarged view at position A in

[0027] Figure 4 is Figure 2 the enlarged view at position C in

[0028] Each label in the figure represents: 1, material chamber; 11, mounting rack; 12, mounting groove; 13, sealing ring; 2, air chamber; 3, distribution net; 4, conical guide cylinder; 41, guide hole; 42, fixed seat; 43, lifting handle; 44, first reinforcing rib; 45, second reinforcing rib; 5, air inlet component; 51, air inlet square pipe; 52, round-to-square docking pipe; 6, air inlet round pipe. Detailed Description of the Specific Embodiment

[0029] The following further elaborates on the present utility model in detail in conjunction with the accompanying drawings of the specification and specific embodiments.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0031] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality of" is two or more unless otherwise specifically defined.

[0032] In the present utility model, unless otherwise clearly specified and defined, terms such as "assembled", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] Figures 1 to 4 An embodiment of the fluidized bed air distribution structure of the present utility model is shown. The fluidized bed air distribution structure of this embodiment includes an air chamber 2 connected to the bottom of the material chamber 1. A distribution net 3 for carrying materials is provided in the material chamber 1. A conical guide cylinder 4 is provided in the air chamber 2. The conical guide cylinder 4 is located below the distribution net 3. The conical guide cylinder 4 is provided with guide holes 41. The air chamber 2 is communicated with an air inlet assembly 5.

[0034] For this fluidized bed air distribution structure, the air inlet assembly 5 feeds air into the air chamber 2. The conical structure of the conical guide cylinder 4 is used to gather and guide the air, so that the air can be blown to the middle and edges of the distribution net 3, achieving an air distribution effect, reducing the difference in air volume, air pressure and temperature between the middle and the edges of the distribution net 3, improving the uniformity of air drying, and there is no need to set up complex air distribution pipes. The structure is simple and the risk of pipeline blockage is reduced. Preferably, in this embodiment, the bottom edge of the conical guide cylinder 4 should extend to the edge of the distribution net 3 to enhance the air distribution effect.

[0035] Furthermore, as Figure 1 、 2 and shown in 3, in this embodiment, an installation frame 11 is detachably provided at the bottom of the material chamber 1. The conical guide cylinder 4 is arranged on the installation frame 11, and the tip of the conical guide cylinder 4 faces the distribution net 3. The installation frame 11 provides an installation foundation for the conical guide cylinder 4, and the installation frame 11 is detachably connected to the bottom of the material chamber 1, facilitating the replacement of the conical guide cylinder 4.

[0036] Furthermore, as Figure 3 shown, in this embodiment, an installation groove 12 is provided between the installation frame 11 and the material chamber 1. The distribution net 3 is arranged in the installation groove 12. It is convenient for the installation of the distribution net 3 and reduces the installation height.

[0037] Further, as Figure 3 shown, in this embodiment, a sealing ring 13 is provided between the distribution network 3 and the mounting bracket 11, ensuring the sealing between the distribution network 3 and the mounting bracket 11 and preventing particles and powder on the distribution network 3 from entering the air chamber 2.

[0038] Further, as Figure 2 shown, in this embodiment, a fixing seat 42 is detachably provided at the top of the mounting bracket 11, and the distribution network 3 is clamped between the fixing seat 42 and the mounting bracket 11, which is beneficial to fixing the middle part of the distribution network 3 and reducing the deformation of the distribution network 3 caused by wind force. Preferably, the detachable connection method between the fixing seat 42 and the conical guide cylinder 4 is a threaded connection.

[0039] Further, as Figure 2 shown, in this embodiment, a lifting handle 43 is provided on the fixing seat 42, which is convenient for lifting the mounting bracket 11, the distribution network 3 and the conical guide cylinder 4.

[0040] Further, as Figure 2 and 4 shown, in this embodiment, there are multiple diversion holes 41, and the multiple diversion holes 41 are evenly arranged along the circumferential and generatrix directions of the conical guide cylinder 4, further improving the air distribution effect.

[0041] Further, as Figure 4 shown, in this embodiment, the diversion holes 41 face the outside of the distribution network 3. Since the wind pressure and air volume in the middle are greater than those at the edge during air intake, the diversion holes 41 facing the outside of the distribution network 3 are beneficial to increasing the wind pressure and air volume at the edge, achieving a better air distribution effect.

[0042] Further, as Figure 2 shown, in this embodiment, a first reinforcing rib 44 is provided between the barrel walls of the conical guide cylinder 4, and a second reinforcing rib 45 is provided between the outside of the barrel wall and the mounting bracket 11, improving the strength of the conical guide cylinder 4 and enhancing its wind resistance performance.

[0043] Further, as Figure 1 shown, in this embodiment, the air intake assembly 5 includes an air intake square pipe 51 and a round-to-square docking pipe 52. One end of the round-to-square docking pipe 52 is connected to the front air intake round pipe 6, and the other end is connected to the air intake square pipe 51. The air intake square pipe 51 is located below the conical guide cylinder 4. Generally, the fan uses the round pipe 6 to supply air. Through the round-to-square docking pipe 52, the air chamber 3 is connected to the air intake square pipe 51. Therefore, without changing the air intake cross-sectional area, that is, without changing the air intake volume, the air intake height is reduced, and the distribution space for bottom air intake is increased, achieving a preliminary air distribution effect. Cooperating with the secondary air distribution of the conical guide cylinder 4, the air distribution effect is better.

[0044] Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present utility model by using the technical content disclosed above without departing from the scope of the technical solution of the present utility model, or modify it into an equivalent embodiment with equivalent changes. Therefore, all simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model shall fall within the scope of protection of the technical solution of the present utility model.

Claims

1. A fluidized bed wind distribution structure, characterized in that: The invention comprises a wind chamber (2) connected to the bottom of a material chamber (1), wherein a distribution net (3) for carrying materials is provided in the material chamber (1), wherein a conical guide tube (4) is provided in the wind chamber (2), wherein the conical guide tube (4) is located below the distribution net (3), and wherein a guide hole (41) is provided on the conical guide tube (4), and wherein the wind chamber (2) is connected to an air inlet assembly (5).

2. The fluidized bed air distribution structure according to claim 1, characterized in that: A mounting frame (11) is detachably provided at the bottom of the material chamber (1), and the conical guide tube (4) is arranged on the mounting frame (11), with the tip of the conical guide tube (4) facing the distribution network (3).

3. The fluidized bed air distribution structure according to claim 2, characterized in that: A mounting groove (12) is provided between the mounting frame (11) and the material chamber (1), and the distribution network (3) is arranged in the mounting groove (12).

4. The fluidized bed air distribution structure according to claim 3, characterized in that: A sealing ring (13) is provided between the distribution network (3) and the mounting frame (11).

5. The fluidized bed air distribution structure according to any one of claims 2 to 4, characterized in that: A fixing seat (42) is detachably provided on the top of the mounting frame (11), and the distribution network (3) is clamped between the fixing seat (42) and the mounting frame (11).

6. The fluidized bed air distribution structure according to claim 5, characterized in that: The fixing seat (42) is threadedly connected to the conical guide tube (4), and a lifting handle (43) is provided on the fixing seat (42).

7. The fluidized bed wind distribution structure according to any one of claims 1 to 4, characterized in that: A plurality of the guide holes (41) are provided, and the plurality of guide holes (41) are evenly arranged along the circumferential direction and generatrix direction of the conical guide tube (4), and the guide holes (41) face the outside of the distribution network (3).

8. The fluidized bed air distribution structure according to any one of claims 1 to 4, characterized in that: A first reinforcing rib (44) is provided between the walls of the conical guide tube (4), and a second reinforcing rib (45) is provided between the outer side of the tube wall and the mounting frame (11).

9. The fluidized bed air distribution structure according to any one of claims 1 to 4, characterized in that: The air inlet assembly (5) comprises an air inlet square tube (51) and a circular-square butt-joint tube (52); one end of the circular-square butt-joint tube (52) is connected to the front air inlet circular tube (6), and the other end is connected to the air inlet square tube (51); the air inlet square tube (51) is located below the conical guide tube (4).

10. A fluidized bed granulation device, characterized in that: The fluidized bed comprises the fluidized bed wind distribution structure according to any one of claims 1 to 9.

Images