A spray drying device for stevia production

Abstract

This utility model discloses a spray drying device for stevia production, belonging to the technical field of spray drying equipment. It includes a processing table, a drying tower, a support plate, a mixing tank, a drive motor, a rotating rod, a connecting plate, a stirring shaft, and a stirring rod. A filter assembly is installed between the drying tower and the mixing tank. A drying assembly is installed at one end of the top of the drying tower, and a separation assembly is connected to the bottom of the drying tower. This utility model, through the coordinated use of the mixing tank, drive motor, rotating rod, connecting plate, stirring shaft, stirring rod, and filter assembly, can mix and filter materials, allowing the material in the center to continuously exchange with the material on the outside. This solves the problem of sedimentation after long-term storage and the difficulty in atomization, ensuring the quality of the material entering the drying tower, improving the atomization efficiency of the material, and increasing the practicality of the device.

Description

Technical Field

[0001] This utility model relates to the technical field of spray drying equipment, specifically a spray drying device for stevia production. Background Technology

[0002] Steviosides are a class of tetracyclic diterpenoid derivatives mainly found in stevia leaves. They mainly include eight glycosides such as stevioside A, stevioside B, and stevioside C. Their sweetness is about 300 times that of sucrose. Studies have shown that steviosides are characterized by high sweetness, low calories, and no obvious toxic side effects. They can inhibit hyperglycemia and hypertension, and have anti-inflammatory, anti-tumor, antidiarrheal, diuretic, and immune-regulating effects. Currently, South America, Japan, and China have widely used steviosides as a natural sweetener in food and beverages.

[0003] Spray dryers are a type of continuous atmospheric pressure dryer that uses special equipment to spray liquid materials into a mist, allowing them to come into contact with hot air and be dried. They are used to dry some heat-sensitive liquids, suspensions, and viscous liquids, such as milk, eggs, tannins, and pharmaceuticals.

[0004] Chinese Patent Publication No. CN208911475U discloses a steviol glycoside spray drying device, including a drying tower and a support. The bottom of the drying tower is embedded in the interior of the support. A connecting box is provided at the top of the drying tower. The bottom of the connecting box is connected to a through hole opened at the top of the drying tower. A nozzle is inserted inside the connecting box. The bottom of the nozzle is provided with a nozzle. The top of the nozzle is connected to a feed pipe. An opening is provided on one side of the connecting box. The connecting box is connected to an air inlet pipe through the opening. One end of the air inlet pipe is connected to an air heater installed on the other side of the top of the drying tower. A valve is installed in the middle of the air inlet pipe. A blower is installed on one side of the air heater. A cyclone separator is fixedly installed at the bottom outlet of the drying tower. An induced draft fan is installed through a pipe at the side outlet of one side of the cyclone separator.

[0005] The steviol glycoside spray drying device mentioned in the above patent still has some obvious shortcomings in actual use. The device lacks a structure for stirring and mixing the material, which leads to the problem of sedimentation after the material is left for a long time, affecting the purity of the material and making it unable to be atomized. Therefore, we need to propose a spray drying device for stevia production. Utility Model Content

[0006] The purpose of this invention is to provide a spray drying device for stevia production, which has a structure that can stir stevia materials, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a spray drying device for stevia production, comprising a processing table, a drying tower mounted on the upper end of the processing table, a support plate fixedly mounted on one side of the drying tower, a mixing tank mounted on the upper end of the support plate, a drive motor fixedly mounted on the upper end of the mixing tank, a rotating rod rotatably connected to the upper end of the mixing tank, the upper end of the rotating rod being fixedly connected to the output end of the drive motor, three sets of connecting plates connected to the lower end of the rotating rod inside the mixing tank, a stirring shaft fixedly connected to one end of the bottom of the connecting plates, several sets of stirring rods evenly fixedly mounted on the surface of the stirring shaft, a filter assembly for filtering materials between the top of the drying tower and the lower end of the mixing tank, a drying assembly for drying materials at one end of the top of the drying tower, and a separation assembly for separating material particles connected to the bottom of the drying tower.

[0008] Preferably, the filtration assembly includes a fixed cover connected to the lower end of the mixing tank, a connecting cylinder adapted to be provided inside the fixed cover, the upper surface of the connecting cylinder being threadedly connected to the inner wall of the fixed cover, a filter plate being provided inside the connecting cylinder, and a conveying mechanism for conveying the filtered material to the inside of the drying tower being connected to the lower end of the connecting cylinder.

[0009] Preferably, the conveying mechanism includes a heating box fixedly installed on the top of the drying tower. The interior of the heating box is connected to the interior of the drying tower through a vent. A nozzle is provided inside the heating box, and the lower end of the nozzle extends into the interior of the drying tower.

[0010] Preferably, the conveying mechanism further includes a connecting pipe rotatably connected to the lower end of the connecting cylinder, one end of the connecting pipe being connected to a material pump, and one end of the material pump being connected to the upper end of the nozzle through a pipe.

[0011] Preferably, the drying assembly includes an air heater fixedly installed on one side of the drying tower, and a first fan is provided on the corresponding side of the air heater.

[0012] Preferably, the drying assembly further includes a control valve located at one end of the top of the drying tower, one end of which is connected to the air heater via a pipe, and the other end of which is connected to the interior of the heating chamber via a pipe.

[0013] Preferably, the separation component includes a cyclone separator located at the bottom of the drying tower, a second fan is provided on one side of the cyclone separator, and a discharge pipe is provided at the bottom of the cyclone separator.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention utilizes a mixing tank, a drive motor, a rotating rod, a connecting plate, a stirring shaft, and a filter assembly. Material is poured into the mixing tank, and the drive motor is activated to control the rotating rod. The rotating rod then controls the rotation of the stirring shaft at the bottom of the connecting plate, allowing the stirring rod on the shaft surface to mix the material. The material then passes through the filter assembly into the drying tower, where it is both mixed and filtered. This process ensures continuous exchange between the material in the center and the material on the outer edges, solving the problems of sedimentation and poor atomization after long-term storage. It guarantees the quality of the material entering the drying tower, improves atomization efficiency, and increases the practicality of the device.

[0016] Other features and advantages of this 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. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a front view structural diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the filter plate of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the stirring shaft of this utility model.

[0021] In the diagram: 1. Processing table; 2. Drying tower; 3. Support plate; 4. Mixing tank; 5. Drive motor; 6. Connecting plate; 7. Mixing shaft; 8. Mixing rod; 9. Fixed cover; 10. Connecting cylinder; 11. Filter plate; 12. Heating box; 13. Nozzle; 14. Connecting pipe; 15. Material pump; 16. Air heater; 17. First fan; 18. Control valve; 19. Cyclone separator; 20. Second fan; 21. Discharge pipe; 22. Rotating rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution: a spray drying device for stevia production, including a processing table 1, a drying tower 2, a support plate 3, a mixing tank 4, a drive motor 5, a rotating rod 22, a connecting plate 6, a stirring shaft 7, a stirring rod 8, a filter assembly, a drying assembly, and a separation assembly.

[0024] Preferably, a drying tower 2 is provided on the upper end of the processing table 1. A support plate 3 is fixedly installed on one side of the drying tower 2. A mixing tank 4 is provided on the upper end of the support plate 3. A drive motor 5 is fixedly installed on the upper end of the mixing tank 4. A rotating rod 22 is rotatably connected to the upper end of the mixing tank 4. The upper end of the rotating rod 22 is fixedly connected to the output end of the drive motor 5. Three sets of connecting plates 6 are connected to the lower end of the rotating rod 22 and inside the mixing tank 4. A stirring shaft 7 is fixedly connected to one end of the bottom of the connecting plate 6. Several sets of stirring rods 8 are uniformly fixedly installed on the surface of the stirring shaft 7. A filter assembly for filtering materials is provided between the top of the drying tower 2 and the lower end of the mixing tank 4. A drying assembly for drying materials is provided at one end of the top of the drying tower 2. A separation assembly for separating material particles is connected to the bottom of the drying tower 2.

[0025] Specifically, through the coordinated use of the mixing tank 4, drive motor 5, rotating rod 22, connecting plate 6, stirring shaft 7, stirring rod 8, and filter assembly, the material is poured into the mixing tank 4. Simultaneously, the drive motor 5 is started, causing the rotating rod 22 to rotate. The rotating rod 22 then controls the stirring shaft 7 at one end of the connecting plate 6 to rotate, allowing the stirring rod 8 on the surface of the stirring shaft 7 to stir and mix the material. The material then enters the drying tower 2 through the filter assembly, thus achieving stirring, mixing, and filtration. This allows the material in the center to continuously exchange with the material on the outside, solving the problem of sedimentation after long-term storage and the difficulty in atomization. This ensures the quality of the material entering the drying tower 2, improves the atomization efficiency of the material, and increases the practicality of the device.

[0026] Preferably, the filter assembly includes: a fixed cover 9, a connecting cylinder 10, a filter plate 11, and a conveying mechanism. The fixed cover 9 is connected to the lower end of the mixing tank 4. The connecting cylinder 10 is adapted to be installed inside the fixed cover 9. The upper surface of the connecting cylinder 10 is threadedly connected to the inner wall of the fixed cover 9. The filter plate 11 is installed inside the connecting cylinder 10. The lower end of the connecting cylinder 10 is connected to a conveying mechanism for conveying the filtered material to the inside of the drying tower 2.

[0027] Specifically, by using the fixed cover 9, connecting cylinder 10, filter plate 11 and conveying mechanism together, the stirred material can be filtered, making it easier for the filtered material to enter the interior of the drying tower 2. It also makes it easy to install or disassemble the filter plate 11, and convenient to clean or replace it, thus ensuring the filtration effect of the filter plate 11.

[0028] Preferably, the conveying mechanism includes a heating box 12, a nozzle 13, a connecting pipe 14, and a material pump 15. The heating box 12 is fixedly installed on the top of the drying tower 2. The interior of the heating box 12 is connected to the interior of the drying tower 2 through a vent. The nozzle 13 is installed inside the heating box 12, and the lower end of the nozzle 13 extends into the interior of the drying tower 2. The connecting pipe 14 is rotatably connected to the lower end of the connecting cylinder 10. One end of the connecting pipe 14 is connected to the material pump 15. One end of the material pump 15 is connected to the upper end of the nozzle 13 through a pipe, which can convey the filtered material into the interior of the drying tower 2.

[0029] Preferably, the drying assembly includes an air heater 16, a first fan 17, and a control valve 18. The air heater 16 is fixedly installed on one side of the drying tower 2, and the first fan 17 is provided at a corresponding position on one side of the air heater 16. The control valve 18 is located at one end of the top of the drying tower 2. One end of the control valve 18 is connected to the air heater 16 through a pipe, and the other end of the control valve 18 is connected to the interior of the heating box 12 through a pipe. It can heat the material entering the drying tower 2 and dry the material.

[0030] Preferably, the separation assembly includes: a cyclone separator 19, a second fan 20, and a discharge pipe 21. The cyclone separator 19 is located at the bottom of the drying tower 2, and the second fan 20 is located on one side of the cyclone separator 19. The discharge pipe 21 is located at the bottom of the cyclone separator 19, which can separate the dried particles and facilitate the removal of dust from the impurities mixed in with the dried particles.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spray drying device for stevia production, characterized in that: The system includes a processing table (1), on the upper end of which a drying tower (2) is provided. A support plate (3) is fixedly installed on one side of the drying tower (2). A mixing tank (4) is provided on the upper end of the support plate (3). A drive motor (5) is fixedly installed on the upper end of the mixing tank (4). A rotating rod (22) is rotatably connected to the upper end of the mixing tank (4). The upper end of the rotating rod (22) is fixedly connected to the output end of the drive motor (5). The lower end of the rotating rod (22) is located at the mixing tank. (4) has three sets of connecting plates (6) connected inside. A stirring shaft (7) is fixedly connected to one end of the bottom of the connecting plate (6). Several sets of stirring rods (8) are evenly fixedly installed on the surface of the stirring shaft (7). A filter assembly for filtering materials is provided between the top of the drying tower (2) and the bottom of the stirring tank (4). A drying assembly for drying materials is provided at one end of the top of the drying tower (2). A separation assembly for separating material particles is connected to the bottom of the drying tower (2).

2. The spray drying device for stevia production according to claim 1, characterized in that: The filter assembly includes a fixed cover (9) connected to the lower end of the mixing tank (4), and a connecting cylinder (10) is adapted to be provided inside the fixed cover (9). The upper surface of the connecting cylinder (10) is threadedly connected to the inner wall of the fixed cover (9). A filter plate (11) is provided inside the connecting cylinder (10). A conveying mechanism for conveying the filtered material to the inside of the drying tower (2) is connected to the lower end of the connecting cylinder (10).

3. The spray drying device for stevia production according to claim 2, characterized in that: The conveying mechanism includes a heating box (12) fixedly installed on the top of the drying tower (2). The interior of the heating box (12) is connected to the interior of the drying tower (2) through a vent hole. A nozzle (13) is provided inside the heating box (12), and the lower end of the nozzle (13) extends into the interior of the drying tower (2).

4. The spray drying apparatus for stevia production according to claim 3, characterized in that: The conveying mechanism also includes a connecting pipe (14) rotatably connected to the lower end of the connecting cylinder (10), one end of the connecting pipe (14) is connected to a material pump (15), and one end of the material pump (15) is connected to the upper end of the nozzle (13) through a pipe.

5. The spray drying apparatus for stevia production according to claim 1, characterized in that: The drying assembly includes an air heater (16) fixedly installed on one side of the drying tower (2), and a first fan (17) is provided on the corresponding side of the air heater (16).

6. The spray drying apparatus for stevia production according to claim 5, characterized in that: The drying assembly also includes a control valve (18) located at one end of the top of the drying tower (2). One end of the control valve (18) is connected to the air heater (16) via a pipe, and the other side of the control valve (18) is connected to the interior of the heating box (12) via a pipe.

7. The spray drying apparatus for stevia production according to claim 1, characterized in that: The separation assembly includes a cyclone separator (19) located at the bottom of the drying tower (2), a second fan (20) is provided on one side of the cyclone separator (19), and a discharge pipe (21) is provided at the bottom of the cyclone separator (19).

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