Fluidized bed with spraying device

Abstract

The fluidized bed with the spraying device comprises a bed body, a bed board, an air inlet pipe and a dehumidifying and heating device, the bed body is provided with a cavity, the bed board is arranged in the cavity of the bed body along the front-back direction, the cavity of the bed body is divided into an upper cavity and a lower cavity by the bed board, and the upper cavity is communicated with the lower cavity; the air outlet end of the air inlet pipe is communicated with the cavity of the bed body, and the dehumidifying and heating device is mounted on the air inlet pipe; the fluidized bed with the spraying device comprises a bed body, the front end of the bed body is provided with a feed port communicated with the upper cavity and the outside, the rear end of the bed body is provided with a discharge port communicated with the upper cavity and the outside, and the fluidized bed with the spraying device is characterized by further comprising the spraying device, the spraying device is provided with at least one spraying port, and the spraying port is located in the upper cavity. According to the fluidized bed with the spraying device, when the microcapsule powder is dried, the film sealing liquid can be uniformly sprayed to the microcapsule powder to seal cracks on capsule walls, so that the air isolation capability and the stability of the microcapsule powder are improved, and the shelf life is effectively prolonged.

Description

Technical Field

[0001] This utility model relates to the field of fluidized bed technology, and in particular to a fluidized bed with a spraying device. Background Technology

[0002] Spray drying, as a modern drying process, is widely used in the food industry. The advantages of spray-dried microcapsule powder include long shelf life, high solubility, good dispersibility, and low cost. However, during spray drying, the rapid evaporation of the solvent water in the emulsion causes the microcapsule powder to dry quickly, which can easily leave cracks on the capsule wall, leading to decreased density and reduced airtightness and stability. This, in turn, affects the protective effect on the core material. Furthermore, the microcapsule powder still contains moisture after spray drying, requiring further drying to extend its shelf life. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a fluidized bed with a spraying device. This fluidized bed with a spraying device can uniformly spray a sealing liquid onto the microcapsule powder during the drying process, seal the cracks on the capsule wall, improve the microcapsule powder's ability to prevent air erosion and its stability, and effectively extend its shelf life.

[0004] To solve the above technical problems, the following technical solution is adopted:

[0005] A fluidized bed with a spraying device includes a bed body, a bed board, an air inlet pipe, and a dehumidification and heating device. The bed body has a cavity, and the bed board is arranged in the cavity along the front-to-back direction, dividing the cavity into an upper cavity and a lower cavity, which are connected. The air outlet of the air inlet pipe is connected to the cavity of the bed body, and the dehumidification and heating device is installed on the air inlet pipe. The front end of the bed body has a feed inlet connecting the upper cavity to the outside, and the rear end of the bed body has a discharge outlet connecting the upper cavity to the outside. The fluidized bed with a spraying device further includes a spraying device, which has at least one spray nozzle located in the upper cavity.

[0006] In the aforementioned fluidized bed equipped with a spraying device, the outlet of the spray dryer is connected to the inlet of the bed. The spray-dried microcapsule powder enters the upper cavity of the bed through the inlet and rests on the bed plate. Subsequently, the spraying device sprays a sealing liquid onto the microcapsule powder, sealing any cracks caused by rapid drying. Simultaneously, a dehumidifying and heating device introduces dry hot air into the lower cavity, which then enters the upper cavity through the bed plate, further drying the microcapsule powder. Finally, the dried microcapsule powder is discharged from the outlet. This fluidized bed significantly improves the microcapsule powder's ability to resist air erosion and its stability by spraying a sealing liquid onto the powder and sealing any cracks caused by spray drying, followed by further drying. This effectively extends the shelf life of the microcapsule powder.

[0007] In a preferred embodiment, the spraying device includes a sealing liquid storage tank and at least one sealing liquid nozzle, with the inlet end of the nozzle connected to the outlet end of the storage tank. The nozzle has the spray port and is positioned in the upper cavity of the bed, above the bed plate. The storage tank supplies sealing liquid to the nozzle, which sprays the microcapsule powder with the sealing liquid from above.

[0008] In a further preferred embodiment, the number of sealing liquid nozzles is multiple, with the inlet end of each nozzle connected to the outlet end of the sealing liquid storage tank. Each nozzle is positioned above the bed plate and arranged sequentially from front to back along the length of the bed plate. During the drying process of the microcapsule powder on the bed plate, the sealing liquid nozzles continuously spray the microcapsule powder.

[0009] In a preferred embodiment, the bed board has multiple vertically oriented ventilation holes along its length from front to back. The two ends of each ventilation hole connect to the upper cavity and the lower cavity, respectively. The air outlet of the dehumidifying and heating device is connected to the front end of the lower cavity. Hot air from the dehumidifying and heating device enters the lower cavity from the bottom of the bed and then blows upwards into the upper cavity through the ventilation holes in the bed board, lifting the microcapsule powder. At this point, the hot air contacts and heats the suspended microcapsule powder. The suspended microcapsule powder can continuously tumble in the air, thus allowing the hot air to dry the microcapsule powder from all directions. Similarly, the sealing liquid sprayed by the spraying device can also be sprayed onto the suspended microcapsule powder from all directions, ensuring that cracks in all locations on the microcapsule wall are sealed.

[0010] In a preferred embodiment, the air inlet duct is further equipped with a blower and an air filter, which are connected in sequence. When the blower is running, the air filter draws in and filters the air. The filtered air is then dehumidified and heated by the dehumidification and heating device to form hot air, which enters from the lower cavity. The dehumidification and heating device is a dehumidifier heater.

[0011] In a preferred embodiment, the fluidized bed further includes a dust removal device, which is connected to the upper cavity. After the microcapsule powder is dried, the dust removal device can remove the waste gas (containing moisture and dust, etc.) from the cavity.

[0012] In a further preferred embodiment, the dust removal device includes an induced draft fan and a dust collector. The air inlet of the induced draft fan is connected to the upper cavity, and the air outlet of the induced draft fan is connected to the air inlet of the dust collector. After drying is completed, the induced draft fan draws air from the cavity, and the drawn-out exhaust gas is filtered by the dust collector and then discharged to the outside.

[0013] The beneficial effects of this invention are as follows: This fluidized bed with a spraying device can uniformly spray sealing liquid onto the microcapsule powder during the drying process, thereby sealing the cracks on the capsule wall, improving the microcapsule powder's ability to prevent air erosion and its stability, and effectively extending its shelf life. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the fluidized bed structure in an embodiment of this utility model. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0016] like Figure 1 The fluidized bed shown includes a spraying device, comprising a bed body 1, a bed board 2, an air inlet duct 3, a dehumidification and heating device 4, and a spraying device 5. The bed body 1 has a cavity, and the bed board 2 is arranged in the cavity of the bed body 1 along a front-to-back direction, dividing the cavity of the bed body 1 into an upper cavity 101 and a lower cavity 102, which are connected. The air outlet of the air inlet duct 3 is connected to the cavity of the bed body 1, and the dehumidification and heating device 4 is installed on the air inlet duct 3. The front end of the bed body 1 has a feed inlet 103 that connects the upper cavity 101 to the outside. The rear end of the bed 1 has a discharge port 104 that connects the upper cavity 101 to the outside. The spraying device 5 includes a sealing liquid storage tank 501 and multiple sealing liquid nozzles 502. The inlet end of the sealing liquid nozzle 502 is connected to the outlet end of the sealing liquid storage tank 501. The sealing liquid nozzle 502 has a spray nozzle. The sealing liquid nozzle 502 is set in the upper cavity 101 of the bed 1 and is located above the bed board 2. Each sealing liquid nozzle 502 is located above the bed board 2 and is arranged sequentially from front to back along the length of the bed board 2.

[0017] In the fluidized bed with spraying device described above, the outlet 104 of the spray dryer is connected to the inlet 103 of the bed body 1. After spray drying, the microcapsule powder enters the upper cavity 101 of the bed body 1 through the inlet 103 and sits on the bed plate 2. Subsequently, the sealing liquid storage tank 501 supplies sealing liquid to the sealing liquid nozzle 502, which sprays the sealing liquid onto the microcapsule powder from above to seal the cracks caused by the rapid drying of the microcapsule powder. At the same time, the dehumidifying heating device 4 can introduce dry hot air into the lower cavity 102. The hot air enters the upper cavity 101 through the bed plate 2 to further dry the microcapsule powder. During the drying process of the microcapsule powder on the bed plate 2, the sealing liquid nozzle 502 can continuously spray the microcapsule powder. Finally, the dried microcapsule powder is discharged from the outlet 104. This fluidized bed can seal the cracks on the microcapsule powder caused by spray drying by spraying a sealing liquid onto the microcapsule powder, and then further dry the microcapsule powder, thereby greatly improving the air barrier ability and stability of the microcapsule powder and effectively extending its shelf life.

[0018] Multiple vertically oriented ventilation holes 201 are formed along the length of the bed board 2 from front to back. The two ends of the ventilation holes 201 are connected to the upper cavity 101 and the lower cavity 102, respectively. The air outlet of the dehumidifying heating device 4 is connected to the front end of the lower cavity 102. Hot air from the dehumidifying heating device 4 enters the lower cavity 102 from the bottom of the bed 1, and then blows upward into the upper cavity 101 through the ventilation holes 201 on the bed board 2, blowing up the microcapsule powder. At this time, the hot air comes into contact with the suspended microcapsule powder and heats it. The suspended microcapsule powder can continuously turn in the air, so the hot air can dry the microcapsule powder from all directions. Similarly, the sealing liquid sprayed by the spraying device 5 can also be sprayed onto the suspended microcapsule powder from all directions, ensuring that the cracks in various positions on the microcapsule powder wall are sealed.

[0019] The air inlet duct 3 is also equipped with a blower 6 and an air filter 7, which are connected in sequence to the blower 6, air filter 7, and dehumidification heating device 4. When the blower 6 is running, the air filter 7 draws in air and filters it. The filtered air is then dehumidified and heated by the dehumidification heating device 4 to form hot air, which enters from the lower cavity 102. The dehumidification heating device 4 is a dehumidification heater.

[0020] The fluidized bed also includes a dust removal device 8, which comprises an induced draft fan 801 and a dust collector 802. The air inlet of the induced draft fan 801 is connected to the upper cavity 101, and the air outlet of the induced draft fan 801 is connected to the air inlet of the dust collector 802. After the microcapsule powder is dried, the induced draft fan 801 draws air from the cavity to remove the waste gas (containing moisture and dust, etc.) from the cavity. The extracted waste gas is filtered by the dust collector 802 and then discharged to the outside.

Claims

1. A fluidized bed with a spraying device, comprising a bed body, a bed board, an air inlet pipe, and a dehumidification and heating device, wherein the bed body has a cavity, and the bed board is disposed in the cavity of the bed body along a front-to-back direction, the bed board dividing the cavity of the bed body into an upper cavity and a lower cavity, the upper cavity and the lower cavity being connected; the air outlet end of the air inlet pipe is connected to the cavity of the bed body, and the dehumidification and heating device is installed on the air inlet pipe; the front end of the bed body has an inlet port connecting the upper cavity and the outside, and the rear end of the bed body has an outlet port connecting the upper cavity and the outside, characterized in that: The fluidized bed with a spraying device further includes a spraying device having at least one spray nozzle located in the upper cavity.

2. A fluidized bed with a spraying device as described in claim 1, characterized in that: The spraying device includes a sealing liquid storage tank and at least one sealing liquid nozzle. The inlet end of the sealing liquid nozzle is connected to the outlet end of the sealing liquid storage tank. The sealing liquid nozzle has the spray port and is disposed in the upper cavity of the bed body, and is located above the bed board.

3. A fluidized bed with a spraying device as described in claim 2, characterized in that: The number of sealing liquid nozzles is multiple, and the inlet end of each sealing liquid nozzle is connected to the outlet end of the sealing liquid storage tank. Each sealing liquid nozzle is located above the bed board and is arranged sequentially from front to back along the length of the bed board.

4. A fluidized bed with a spraying device as described in claim 1, characterized in that: The bed board has multiple vertical ventilation holes along its length from front to back. The two ends of the ventilation holes are connected to the upper cavity and the lower cavity, respectively. The air outlet of the dehumidification and heating device is connected to the front end of the lower cavity.

5. A fluidized bed with a spraying device as described in claim 1, characterized in that: The air inlet pipe is also equipped with a blower and an air filter, and the blower, air filter and dehumidification heating device are connected in sequence.

6. A fluidized bed with a spraying device as described in claim 1, characterized in that: The fluidized bed also includes a dust removal device, which is connected to the upper cavity.

7. A fluidized bed with a spraying device as described in claim 6, characterized in that: The dust removal device includes an induced draft fan and a dust collector. The air inlet of the induced draft fan is connected to the upper cavity, and the air outlet of the induced draft fan is connected to the air inlet of the dust collector.

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