Fluidized bed spray dryer capable of repeatedly granulating

Abstract

The utility model is applicable to the technical field of spray drying, and provides a fluidized bed spray dryer capable of repeatedly granulating, which comprises a drying tower, a secondary granulating component arranged at the top of the drying tower, a secondary filtering component communicated with the drying tower, and an air exhaust component communicated with the secondary filtering component, a stock bin, a drying bin and a fluidization bin are arranged in the drying tower, the secondary granulation assembly comprises an adjusting mechanism installed at the top of the drying tower and a filtering mechanism arranged in the fluidization bin, and the filtering mechanism is used for vibrating the adjusting mechanism. The device solves the problem that particles with small particle sizes collected by a fluidized bed spray dryer need to be dissolved and then enter the spray dryer again for granulation, and achieves the effects that the particles with the small particle sizes are directly shaken to the drying bin for direct secondary granulation through vibration of the filter bag in the fluidization process, and the granulation process is simplified.

Description

TECHNICAL FIELD

[0001] The utility model relates to spray drying technical field, more specifically, it relates to a fluidized bed spray dryer of repeated granulation. BACKGROUND

[0002] The spray dryer is a kind of equipment that can complete drying and granulation simultaneously, and is widely applied in food, chemical industry, pharmacy and other industries.With the continuous development of technology, fluidized bed technology and spray drying technology are combined gradually, forming fluidized bed spray dryer, material is entered into fluidized bed by feeding device, and is suspended and forms fluidized state under the action of hot air;Liquid drop after atomization is in full contact with hot air in fluidized bed, and water is evaporated rapidly, forming dry granule, when granule grows to specified size, it is discharged by discharging device

[0003] Although fluidized bed spray dryer can make material in fluidized state contact with hot air fully, accelerate drying and granulation, but the existing fluidized bed spray dryer collects product granule of inconsistent particle size, and smaller particle size granule needs to be dissolved and re-entered into spray dryer for granulation, which is complicated to operate, and different particle size granules also need to be separated. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the prior art, the utility model aims at providing a fluidized bed spray dryer of repeated granulation, which directly shakes smaller particle size granules to drying bin for secondary granulation by vibration of filter bag during fluidization process, to simplify the granulation process.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A fluidized bed spray dryer of repeated granulation, which comprises a drying tower, a secondary granulation assembly arranged at the top of the drying tower, a secondary filtration assembly communicated with the drying tower and an air extraction assembly communicated with the secondary filtration assembly, the drying tower is internally provided with a material bin, a drying bin and a fluidization bin, the secondary granulation assembly comprises an adjusting mechanism mounted at the top of the drying tower and a filter mechanism arranged in the fluidization bin, and the filter mechanism is used for vibrating the adjusting mechanism.

[0007] The utility model is further provided as follows: the filter mechanism comprises a filter plate used for separating the drying bin and the fluidization bin, and a plurality of filter holes are formed in the filter plate.

[0008] The utility model is further provided as follows: a filter bag is communicated with the top of each filter hole, the filter bags are symmetrically arranged about the drying tower, and each filter bag is connected with an adjusting mechanism at the top.

[0009] The present invention is further configured such that: the adjustment mechanism includes a semi-circular connecting plate connected to the filter bag, the top of the connecting plate is provided with a telescopic rod, and the two sides are symmetrically provided with guide rails.

[0010] The present invention is further configured such that: an adjusting cylinder is connected to the top of the telescopic rod, the adjusting cylinder is installed at the top of the drying tower, and the telescopic rod is installed through the drying tower.

[0011] By adopting the above technical solution, adjusting the extension and retraction of the cylinder can simultaneously drive the telescopic rod to move vertically. During the movement of the telescopic rod, the connecting plate and the guide rail connected to the connecting plate also move vertically. The vertical movement of the connecting plate causes the filter bag at the bottom of the connecting plate to vibrate.

[0012] The present invention is further configured such that: a heating pipe is connected to one side of the silo, and the heating pipe is used to deliver hot air to the inside of the drying tower.

[0013] The present invention is further configured such that: a spray pipe is connected inside the drying chamber, the spray pipe is located at the bottom of the secondary granulation component, and an atomizing head is provided at the end of the spray pipe.

[0014] The present invention is further configured such that the secondary filtration assembly includes a filter box, a collection chamber disposed at the bottom of the filter box, and a connecting pipe communicating with the drying tower.

[0015] The present invention is further configured such that the air extraction assembly includes a fan, an exhaust pipe connected to the fan, and an inlet pipe connected to the filter box.

[0016] The present invention is further configured such that the air inlet pipe is connected to the fan.

[0017] The beneficial effects of this utility model are:

[0018] During the fluidized drying process, two vibration adjustment mechanisms drive the filtration mechanism inside the fluidized chamber to vibrate, shaking smaller material particles into the drying chamber. Under fluidization, these particles come into contact with hot air for secondary granulation, thus simplifying the secondary granulation process. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the structure of the fluidized bed spray dryer with reusable granulation according to this utility model.

[0021] Figure 2 for Figure 1 The diagram shows a cross-sectional view of a fluidized bed spray dryer capable of repeated granulation.

[0022] Figure 3 for Figure 2 The front view of the drying tower shown.

[0023] Figure 4 for Figure 3 The image shows a bottom view of the drying tower.

[0024] Figure 5 for Figure 2 The diagram shows the structure of the secondary granulation component.

[0025] Figure 6 for Figure 5 The diagram shows a secondary granulation component from another perspective.

[0026] Explanation of reference numerals in the attached diagram: 1. Drying tower; 11. Silo; 12. Drying chamber; 13. Fluidization chamber; 14. Heating pipe; 15. Spray pipe; 151. Atomizing head;

[0027] 2. Secondary granulation assembly; 21. Filtration mechanism; 211. Filter plate; 212. Filter holes; 213. Filter bag; 22. Adjustment mechanism; 221. Adjustment cylinder; 222. Telescopic rod; 223. Guide rail; 224. Connecting plate;

[0028] 3. Secondary filtration assembly; 31. Filter box; 32. Collection chamber; 33. Connecting pipe;

[0029] 4. Exhaust assembly; 41. Fan; 42. Inlet duct; 43. Exhaust duct. Detailed Implementation

[0030] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, illustrating only the basic aspects of the present utility model, and therefore only shows the components relevant to the present utility model. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0031] Example 1, please refer to Figures 1-3A fluidized bed spray dryer capable of repeated granulation includes a drying tower 1, a secondary granulation component 2 disposed at the top of the drying tower 1, a secondary filtration component 3 connected to the drying tower 1, and an exhaust component 4 connected to the secondary filtration component 3. The exhaust component 4 generates airflow, which causes the airflow in the drying tower 1 to pass through the secondary filtration component 3 for filtration, and finally circulates back into the drying tower 1 through the exhaust component 4, thereby forming a fluidized airflow in the drying tower 1. Granulation is completed by the contact between the material and hot air under the fluidized airflow. During the granulation process, the secondary granulation component 2 directly shakes smaller particles to the drying tower 1 for secondary granulation, simplifying the secondary granulation process.

[0032] Please refer to Figures 1-4 The drying tower 1 contains a hopper 11, a drying chamber 12, and a fluidization chamber 13. The drying chamber 12 is located on top of the hopper 11, and the fluidization chamber 13 is located on top of the drying chamber 12. A heating pipe 14 is connected to one side of the hopper 11, and the other end of the heating pipe 14 is connected to a device that generates hot air. The heating pipe 14 is used to transport hot air into the drying tower 1 to dry the material. A spray pipe 15 is connected inside the drying chamber 12. The spray pipe 15 is located at the bottom of the secondary granulation component 2, and an atomizing head 151 is provided at the end of the spray pipe 15. The material can be transported to the drying chamber 12 through the spray pipe 15 and finally atomized and dispersed into the drying chamber 12 by the atomizing head 151.

[0033] Please refer to Figures 2-6 The secondary granulation component 2 includes an adjustment mechanism 22 installed at the top of the drying tower 1 and a filter mechanism 21 disposed inside the fluidization chamber 13. The filter mechanism 21 is used for vibration adjustment mechanism 22. The filter mechanism 21 includes a filter plate 211 for separating the drying chamber 12 and the fluidization chamber 13. The filter plate 211 is connected to the inner wall of the drying tower 1 to prevent material in the drying chamber 12 from directly entering the fluidization chamber 13. The filter plate 211 has several filter holes 212, and filter bags 213 are correspondingly disposed at the top of the filter holes 212 and connected to them. Several filter bags 213 are symmetrically arranged about the drying tower 1, and each filter bag 213 is connected to an adjustment mechanism 22 at its top. The airflow and material particles in the drying chamber 12 can enter the filter bags 213 under fluidization, and the material particles and gas are separated by filtration through the filter bags 213.

[0034] Please refer to Figures 2-6The adjusting mechanism 22 includes a semi-circular connecting plate 224 connected to the filter bag 213, with two connecting plates 224 symmetrically arranged. A telescopic rod 222 is provided at the top of the connecting plate 224, and guide rails 223 are symmetrically arranged on both sides. An adjusting cylinder 221 is connected to the top of the telescopic rod 222, which is installed at the top of the drying tower 1. The telescopic rod 222 passes through the drying tower 1. The extension and retraction of the adjusting cylinder 221 synchronously drives the telescopic rod 222 to move vertically. During the movement of the telescopic rod 222, the connecting plate 224 and the guide rails 223 connected to the connecting plate 224 also move vertically. The vertical movement of the connecting plate 224 causes the filter bag 213 at its bottom to vibrate, thereby shaking smaller material particles inside the filter bag 213 into the drying chamber 12, allowing these smaller particles to re-contact with the hot air under fluidization for secondary granulation.

[0035] Please refer to Figures 1-2 The secondary filtration assembly 3 includes a filter box 31, a collection chamber 32 located at the bottom of the filter box 31, and a connecting pipe 33 connected to the drying tower 1. After the airflow in the drying chamber 12 is separated by the filter bag 213, it continues to enter the filter box 31 along the connecting pipe 33 for filtration. The incompletely separated material can enter the collection chamber 32 for easy collection.

[0036] Please refer to Figures 1-2 The exhaust assembly 4 includes a fan 41, an exhaust pipe 43 connected to the fan 41, and an inlet pipe 42 connected to the filter box 31. The inlet pipe 42 is connected to the fan 41. When the fan 41 operates, the airflow in the filter box 31 passes through the inlet pipe 42 into the fan 41, and then enters the exhaust pipe 43 for discharge. The gas undergoes fluidization as it flows along the drying chamber 12, filter bag 213, fluidization chamber 13, connecting pipe 33, filter box 31, inlet pipe 42, fan 41, and exhaust pipe 43.

[0037] Specifically, hot air enters the silo 11 through the heating pipe 14, and the material is transported to the drying chamber 12 through the spray pipe 15. Finally, it is atomized by the atomizing head 151 and dispersed into the interior of the drying chamber 12. The operation of the fan 41 causes the gas in the drying chamber 12 to be filtered by the filter bag 213, and then continues to enter the filter box 31 for secondary filtration along the connecting pipe 33. After secondary filtration, it enters the fan 41 along the air inlet pipe 42, and then enters the exhaust pipe 43 for discharge. The gas undergoes fluidization as it flows along the drying chamber 12, filter bag 213, fluidization chamber 13, connecting pipe 33, filter box 31, air inlet pipe 42, fan 41, and exhaust pipe 43. The hot air and the material come into contact under the fluidization effect, accelerating the evaporation of moisture and forming dry particles.

[0038] During the drying process, the regulating cylinder 221 extends and retracts, causing the telescopic rod 222 to move vertically. Simultaneously, the telescopic rod 222 moves, causing the connecting plate 224 to move as well. The vertical movement of the connecting plate 224 causes the filter bag 213 at its bottom to vibrate, thereby shaking smaller material particles inside the filter bag 213 into the drying chamber 12.

[0039] During the fluidized drying process, two vibration adjustment mechanisms 22 drive the filter mechanism 21 inside the fluidized chamber 13 to vibrate, shaking smaller material particles into the drying chamber 12. Under the action of fluidization, they come into contact with hot air and undergo secondary granulation, thereby simplifying the secondary granulation process.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] It should be understood that the terms "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 this utility model.

[0042] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A repeatable granulating fluid bed spray dryer characterized by: The application relates to a secondary granulation device, which comprises a drying tower (1), a secondary granulation assembly (2) arranged at the top of the drying tower (1), a secondary filtration assembly (3) communicated with the drying tower (1) and an air extraction assembly (4) communicated with the secondary filtration assembly (3), wherein the drying tower (1) is internally provided with a material bin (11), a drying bin (12) and a fluidization bin (13), the secondary granulation assembly (2) comprises an adjusting mechanism (22) arranged at the top of the drying tower (1) and a filtering mechanism (21) arranged in the fluidization bin (13), and the filtering mechanism (21) is used for vibrating the adjusting mechanism (22).

2. A fluid bed spray dryer for repeatable granulation according to claim 1, characterised in that: The filtering mechanism (21) comprises a filtering plate (211) used for separating the drying bin (12) and the fluidization bin (13), and a plurality of filter holes (212) are arranged on the filtering plate (211).

3. A fluid bed spray drier capable of repeated granulation according to claim 2, characterised in that: Corresponding filtering bags (213) are arranged on the top of the filter holes (212), the filtering bags (213) are symmetrically arranged relative to the drying tower (1), and one adjusting mechanism (22) is connected to the top of each filtering bag (213).

4. A fluid bed spray drier capable of repeated granulation according to claim 3 wherein: The adjusting mechanism (22) comprises a semicircular connecting plate (224) connected with the filtering bag (213), the top of the connecting plate (224) is provided with an extension rod (222), and guide rails (223) are symmetrically arranged on the two sides of the extension rod (222).

5. A fluid bed spray drier capable of repeated granulation according to claim 4 wherein: An adjusting cylinder (221) is connected to the top of the extension rod (222), the adjusting cylinder (221) is arranged at the top of the drying tower (1), and the extension rod (222) penetrates through the drying tower (1).

6. A fluid bed spray dryer capable of repeated granulation according to claim 1, wherein: One side of the material bin (11) is communicated with a heat supply pipeline (14), and the heat supply pipeline (14) is used for conveying hot air into the drying tower (1).

7. A fluid bed spray drier capable of repeated granulation according to claim 6 wherein: The inside of the drying bin (12) is communicated with a spraying pipeline (15), the spraying pipeline (15) is arranged at the bottom of the secondary granulation assembly (2), and atomizing heads (151) are arranged at the ends of the spraying pipeline (15).

8. A fluid bed spray dryer capable of repeated granulation according to claim 1, wherein: The secondary filtration assembly (3) comprises a filtering box (31), a collecting bin (32) arranged at the bottom of the filtering box (31) and a connecting pipe (33) communicated with the drying tower (1).

9. A fluid bed spray drier capable of repeated granulation according to claim 8, characterised in that: The air extraction assembly (4) comprises a fan (41), an exhaust pipe (43) communicated with the fan (41) and an air inlet pipe (42) communicated with the filtering box (31).

10. A fluid bed spray drier capable of repeated granulation according to claim 9, characterised in that: The air inlet pipe (42) is connected with the fan (41).

Images