Grain fluidization drying and sorting integrated device and working method thereof

Abstract

The application provides a grain fluidization drying and sorting integrated device and a working method thereof, and belongs to the technical field of granular material drying. The device solves the problem that the existing grain drying and sorting device is difficult to screen through a sorting plate because there is no great difference in size between bursted grains and normal grains. The device comprises a hot air flow generating device, a fluidized bed drying device, a dust removal device and a sorting device. The hot air flow generating device comprises a fan, a rotor flow meter and a temperature control device. The fan is connected with the temperature control device. The rotor flow meter is arranged between the fan and the temperature control device. The fluidized bed drying device comprises an air inlet, an inner air chamber, a feeding port, a wind distribution plate and a drying chamber. The inner air chamber is internally provided with the wind distribution plate. The air inlet is connected with the temperature control device. An upper space formed by the inner air chamber and the wind distribution plate is the drying chamber. The feeding port is arranged on the outer side of the drying chamber. The drying chamber is connected with the dust removal device. The sorting device is connected with the dust removal device. The device is mainly used for grain drying and sorting.

Description

Technical Field

[0001] This invention belongs to the field of particulate material drying technology, and in particular relates to an integrated device for fluidized bed drying and sorting of grain and its working method. Background Technology

[0002] Fluidized bed dryers are common drying equipment, widely used in agricultural, pharmaceutical, food, and chemical industries due to their high heat transfer efficiency. Fresh grains have a moisture content far exceeding the safe moisture content for storage, necessitating drying after harvesting. However, during the drying process, uneven drying and inconsistent particle size can cause some grains to crack, resulting in grain damage. These cracked grains, known as "broken grains," have low strength and are prone to breakage during subsequent processing and transportation, severely impacting the nutritional value and economic viability of the grain product.

[0003] Currently available grain drying and sorting devices mostly use sorting plates with different apertures to screen the particle size, thereby filtering out broken or small particles during the drying process. However, the size of cracked grains is not significantly different from that of normal grains, making it difficult to screen them through the sorting plates. This results in cracked grains being mixed in with the dried grain particles, affecting the drying quality and nutritional value of the grain. Summary of the Invention

[0004] In view of this, the present invention aims to propose an integrated device for fluidized bed drying and sorting of grain and its working method, so as to solve the problem that existing grain drying and sorting devices have difficulty screening grains that have cracked edges and normal grains because their sizes are not significantly different.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An integrated fluidized bed drying and sorting device for grain includes a hot airflow generator, a fluidized bed drying device, a dust removal device, and a sorting device. The hot airflow generator includes a fan, a rotor flow meter, and a temperature control device. The fan is connected to the temperature control device, and the rotor flow meter is disposed between the fan and the temperature control device. The fluidized bed drying device includes an air inlet, an inner air chamber, a feed inlet, an air distribution plate, and a drying chamber. The inner air chamber is equipped with an air distribution plate, and an air inlet is installed in the lower space formed by the inner air chamber and the air distribution plate. The air inlet is connected to the temperature control device. The upper space formed by the inner air chamber and the air distribution plate is the drying chamber. A feed inlet is installed on the outer side of the drying chamber. The drying chamber is connected to the dust removal device, and the sorting device is connected to the dust removal device.

[0007] Furthermore, an air filter is installed at the input end of the fan.

[0008] Furthermore, the dust removal device includes a cyclone separator, a discharge port, and a bag filter. The cyclone separator is connected to the drying chamber, the discharge port is connected to the discharge end of the cyclone separator, and the bag filter is connected to the air outlet end of the cyclone separator.

[0009] Furthermore, the sorting device includes a vibrating sorting device, a non-destructive grain silo, and a pellet silo. The vibrating sorting device is located below the discharge port, the non-destructive grain silo is located below one side of the vibrating sorting device, and the pellet silo is located below the other side of the vibrating sorting device.

[0010] Furthermore, the air distribution holes on the air distribution plate are circular holes.

[0011] Furthermore, the angle between the opening direction of the air distribution hole and the vertical line of the air distribution plate is 0-15°.

[0012] Furthermore, the fluidized bed drying device operates in shallow bed mode, with a bed height to diameter ratio of less than 0.5.

[0013] Furthermore, the grain particles have a particle size range of 1.0-5.0 mm.

[0014] Furthermore, the air velocity at the inlet of the air filter ranges from 2 m / s to 5 m / s.

[0015] A method for operating an integrated fluidized bed drying and sorting device for grain includes the following steps:

[0016] Step 1: Air is filtered through an air filter, passes through a fan whose flow rate is controlled by a rotor flow meter, and then enters a temperature control device for heating;

[0017] Step 2: The heated air enters the inner air chamber through the air inlet and is guided into the drying chamber by the air distribution plate.

[0018] Step 3: The grains to be dried are fed into the inner air chamber through the inlet and dried by the air heated in Step 2.

[0019] Step 4: The dried grains collide in the cyclone separator and then enter the vibrating sorting device through the discharge port for vibrating screening. The undamaged grains are transported to the undamaged grain silo, and the broken grains are transported to the crushed grain silo.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. This invention uses a cyclone separator to crush the cracked grains, and then uses a vibration sorting device to separate the undamaged grains from the crushed grains, thereby removing the cracked grains. This can effectively improve the drying quality of the grains and the reliability of the drying equipment.

[0022] 2. In this invention, the air is first heated by a hot airflow generator. The heated air then enters the drying chamber. The dust removal device consists of a cyclone separator, a discharge port, and a bag filter. Through two-stage treatment, the discharged hot air is ensured to undergo thorough dust removal, thereby achieving efficient drying and a clean operating environment. The grains are crushed by collision in the cyclone separator. Then, the grain particles enter the vibrating sorting device through the discharge port for vibrating screening. Undamaged particles are transported to the undamaged grain silo, while broken particles are transported to the broken particle silo, thus ensuring the quality of the grain at the time of leaving the factory. Attached Figure Description

[0023] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0024] Figure 1 This is a schematic diagram of an integrated grain fluidized bed drying and sorting device according to the present invention.

[0025] 1-Air filter, 2-Fan, 3-Rotameter, 4-Temperature control device, 5-Air inlet, 6-Inner air chamber, 7-Feed inlet, 8-Air distribution plate, 9-Drying chamber, 10-Cyclone separator, 11-Discharge outlet, 12-Bag dust collector, 13-Vibration sorting device, 14-Non-destructive grain silo, 15-Pellet silo. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0027] See Figure 1This embodiment describes an integrated fluidized bed drying and sorting device for grain, comprising a hot airflow generator, a fluidized bed drying device, a dust removal device, and a sorting device. The hot airflow generator includes a fan 2, a rotor flow meter 3, and a temperature control device 4. The fan 2 is connected to the temperature control device 4, and the rotor flow meter 3 is disposed between the fan 2 and the temperature control device 4. The fluidized bed drying device includes an air inlet 5, an inner air chamber 6, a feed inlet 7, an air distribution plate 8, and a drying chamber 9. The air distribution plate 8 is disposed inside the inner air chamber 6, and the air inlet 5 is installed in the lower space formed by the inner air chamber 6 and the air distribution plate 8. The air inlet 5 is connected to the temperature control device 4. The upper space formed by the inner air chamber 6 and the air distribution plate 8 is the drying chamber 9, and the feed inlet 7 is installed on the outside of the drying chamber 9. The drying chamber 9 is connected to the dust removal device, and the sorting device is connected to the dust removal device.

[0028] An air filter 1 is installed at the input end of the fan 2.

[0029] Air is first filtered through air filter 1, then its flow rate is controlled by rotor flow meter 3 via fan 2, and then it enters temperature control device 4 for heating. The fluidized bed drying device includes air inlet 5, inner air chamber 6, feed inlet 7, air distribution plate 8, and drying chamber 9. Gas is delivered to inner air chamber 6 through air inlet 5 and guided into drying chamber 9 by air distribution plate 8, providing drying gas for grain particles. The dust removal device consists of cyclone separator 10, discharge port 11, and bag filter 12, ensuring that the discharged hot air undergoes sufficient dust removal through two-stage treatment. The sorting device consists of vibrating sorting device 13, non-destructive grain silo 14, and crushed grain silo 15. The vibrating sorting device has an embedded sorting plate for... The process separates undamaged grains from broken grains. Undamaged grains are conveyed to the undamaged grain silo 14, while broken grains are conveyed to the broken grain silo 15. This two-stage treatment ensures that the discharged hot air undergoes thorough dust removal, thereby achieving efficient drying and a clean operating environment. Cracked grains are crushed by collision in the cyclone separator. Then, the grain particles enter the vibrating sorting device from the discharge port for vibrating screening. Undamaged grains are conveyed to the undamaged grain silo, while broken grains are conveyed to the broken grain silo, thus ensuring the quality of the grains leaving the factory. The vibrating sorting device 13 separates undamaged grains from broken grains, thereby removing cracked grains and effectively improving the drying quality of the grain particles and the reliability of the drying equipment.

[0030] Furthermore, the airflow passes through the air filter 1, then through the fan 2, where the flow rate is controlled by the rotor flow meter 3, and then enters the temperature control device 4 for heating. The appropriate airflow rate and temperature can be adjusted for different types of grain particles, thereby improving the grain particle drying process.

[0031] Furthermore, the dust removal device includes a cyclone separator 10, a discharge port 11, and a bag filter 12. The cyclone separator 10 is connected to the drying chamber 9, the discharge port 11 is connected to the discharge end of the cyclone separator 10, and the bag filter 12 is connected to the air outlet end of the cyclone separator 10. After drying, the grain particles enter the cyclone separator 10 with an adjustable speed for collision. The speed is adjusted to a speed that can crush the broken grains without crushing the undamaged grains. The speed can be adjusted according to the different types of grain particles. The hot air is discharged after passing through the two-stage dust removal device of the cyclone separator 10 and the bag filter 12.

[0032] Furthermore, the sorting device includes a vibrating sorting device 13, a non-destructive grain silo 14, and a crushed grain silo 15. The vibrating sorting device 13 is located below the discharge port 11, the non-destructive grain silo 14 is located below one side of the vibrating sorting device 13, and the crushed grain silo 15 is located below the other side of the vibrating sorting device 13. The grain particles after collision enter the vibrating sorting device 13 through the discharge port 11 for vibrating screening. Then, the grain particles without cracks are conveyed to the non-destructive grain silo 14, and the crushed grain particles are conveyed to the crushed grain silo 15.

[0033] Furthermore, the air distribution holes on the air distribution plate 8 are circular holes, and the angle between the opening direction of the air distribution holes and the vertical line of the air distribution plate 8 is 0-15°. The grain particles are added into the drying chamber 9 through the feed inlet 7, and the hot air flow in the inner air chamber 6 flows into the drying chamber 9 through the air distribution plate 10. The air distribution holes are circular holes, and the angle between the opening direction of the holes and the vertical line of the air distribution plate is 0-15°. The grain particles are fully dried under the action of the hot air flow.

[0034] Furthermore, the fluidized bed drying device operates in shallow bed mode, with a bed height to diameter ratio of less than 0.5.

[0035] Furthermore, this device is used for grain particles with a particle size range of 1.0-5.0 mm, which can ensure efficient screening of grain particles. The air velocity at the inlet of the air filter 1 is in the range of 2 m / s-5 m / s, which can ensure that the particles in the fluidized bed enter a uniform fluidization state, thereby improving the drying quality of grain particles.

[0036] Furthermore, a method for operating an integrated grain fluidized bed drying and sorting device includes the following steps:

[0037] Step 1: Air is filtered through air filter 1, passes through fan 2 and its flow rate is controlled by rotor flow meter 3, and then enters temperature control device 4 for heating;

[0038] Step 2: The heated air enters the inner air chamber 6 through the air inlet 5, and is guided into the drying chamber 9 by the air distribution plate 8.

[0039] Step 3: The grains to be dried are fed into the inner air chamber 6 through the feed inlet 7 and dried by the air heated in step 2.

[0040] Step 4: The dried grain is collided in the cyclone separator 10, and then enters the vibrating sorting device 13 through the discharge port 11 for vibrating screening. The undamaged grain is transported to the undamaged grain silo 14, and the broken grain is transported to the crushed grain silo 15.

[0041] The embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. An integrated device for fluidized bed drying and sorting of grain, characterized in that: The system includes a hot airflow generator, a fluidized bed drying device, a dust removal device, and a sorting device. The hot airflow generator includes a fan (2), a rotor flowmeter (3), and a temperature control device (4). The fan (2) is connected to the temperature control device (4), and the rotor flowmeter (3) is located between the fan (2) and the temperature control device (4). The fluidized bed drying device includes an air inlet (5), an inner air chamber (6), a feed inlet (7), an air distribution plate (8), and a drying chamber (9). The inner air chamber (6) is equipped with an air distribution plate (8). The lower space formed by the inner air chamber (6) and the air distribution plate (8) is equipped with an air inlet (5). The air inlet (5) is connected to the temperature control device (4). The upper space formed by the inner air chamber (6) and the air distribution plate (8) is the drying chamber (9). The drying chamber (9) is located outside the... The drying chamber (9) is connected to the dust removal device, and the sorting device is connected to the dust removal device. The dust removal device includes a cyclone separator (10), a discharge port (11), and a bag filter (12). The cyclone separator (10) is connected to the drying chamber (9), and the discharge port (11) is connected to the discharge end of the cyclone separator (10). The sorting device includes a vibrating sorting device (13), a non-destructive grain silo (14), and a crushed grain silo (15). The vibrating sorting device (13) is located below the discharge port (11). After drying, the grain particles enter the cyclone separator (10) with adjustable speed for collision. The speed is adjusted to a speed that can crush the broken grains without crushing the non-destructive grains, and the speed can be adjusted according to the different types of grain particles.

2. The integrated grain fluidized bed drying and sorting device according to claim 1, characterized in that: An air filter (1) is installed at the input end of the fan (2).

3. The integrated grain fluidized bed drying and sorting device according to claim 1, characterized in that: The bag filter (12) is connected to the outlet end of the cyclone separator (10).

4. The integrated grain fluidized bed drying and sorting device according to claim 3, characterized in that: The non-destructive grain silo (14) is located below one side of the vibrating sorting device (13), and the crushed grain silo (15) is located below the other side of the vibrating sorting device (13).

5. The integrated grain fluidized bed drying and sorting device according to claim 1, characterized in that: The air distribution holes on the air distribution plate (8) are circular holes.

6. The integrated grain fluidized bed drying and sorting device according to claim 5, characterized in that: The angle between the opening direction of the air distribution hole and the vertical line of the air distribution plate (8) is 0-15°.

7. The integrated grain fluidized bed drying and sorting device according to claim 1, characterized in that: The fluidized bed dryer operates in shallow bed mode, with a bed height to diameter ratio of less than 0.

5.

8. The integrated grain fluidized bed drying and sorting device according to claim 1, characterized in that: Used for grain pellets, with a particle size range of 1.0-5.0 mm.

9. The integrated grain fluidized bed drying and sorting device according to claim 2, characterized in that: The air velocity at the inlet of the air filter (1) is in the range of 2m / s-5m / s.

10. A method for operating the integrated grain fluidized bed drying and sorting device as described in any one of claims 1-9, characterized in that: It includes the following steps: Step 1: Air is filtered through an air filter (1), and then flows through a fan (2) with the flow rate controlled by a rotor flow meter (3) before entering a temperature control device (4) for heating; Step 2: The heated air enters the inner air chamber (6) through the air inlet (5), and is guided into the drying chamber (9) by the air distribution plate (8): Step 3: The grains to be dried are fed into the inner air chamber (6) through the feed inlet (7) and dried by the air heated in step 2; Step 4: The dried grains collide in the cyclone separator (10) and then enter the vibrating sorting device (13) through the discharge port (11) for vibrating screening. The undamaged grains are transported to the undamaged grain silo (14), and the broken grains are transported to the crushed grain silo (15).

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