Vacuum drying device and method for processing krill powder

Abstract

The application discloses a kind of vacuum drying device for phosphor shrimp powder processing, it is related to drying processing related technical field, including drying outer cylinder, the two shaft ends of drying outer cylinder downside are connected with support leg, and drying inner cylinder is rotatably connected in drying outer cylinder, driving motor is arranged in the support leg inside being connected to the outside of drying outer cylinder, multiple gas ring grooves are opened on the outer wall of drying inner cylinder in the application, and multiple jet mesh holes are arranged between gas ring groove and drying inner cylinder, multiple boost air cavities opened on the inner wall of lower end of gas guide ring can be intermittently communicated with the inside of drying inner cylinder by multiple jet mesh holes under the rotation of drying inner cylinder, so that hot air introduced into boost air cavity is pressurized and sprayed in the process of communication and dislocation with jet mesh hole, intermittent high-pressure hot gas injection is formed to phosphor shrimp powder, phosphor shrimp powder can be scattered to prevent caking, and heating can be more uniform by gas stirring, improve drying efficiency and drying effect.

Description

Technical Field

[0001] This invention belongs to the technical field of drying and processing, specifically relating to a vacuum drying apparatus and method for processing krill powder. Background Technology

[0002] Currently, the drying and processing of krill powder generally uses traditional drying equipment, such as hot air circulating ovens or belt dryers. During the static or low-speed tumbling drying process, krill powder is prone to local overheating or clumping due to uneven heating, resulting in low drying efficiency and poor drying effect.

[0003] To address the aforementioned issues, this patent proposes a vacuum drying device for krill powder processing that enables efficient heat transfer and dynamic anti-caking, thereby resolving the technical problems mentioned above. Summary of the Invention

[0004] The purpose of this invention is to provide a vacuum drying apparatus and method for processing krill powder, so as to solve the problem of uneven drying of krill powder by traditional drying equipment mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a vacuum drying device for krill powder processing, comprising a drying outer cylinder, with support legs connected to the lower sides of both shaft ends of the drying outer cylinder, and a drying inner cylinder rotatably connected inside the drying outer cylinder. A drive motor is disposed outside the drying outer cylinder and connected inside the support legs. The drive motor is connected to the center of one shaft end of the drying inner cylinder via an output shaft, and the output shaft passes through the interior of the drying outer cylinder. A feed hopper is disposed between the drying outer cylinder and the drive motor, and the feed hopper is connected to the outer wall of the drying outer cylinder and connected to an annular pipe communicating with the drying inner cylinder. The annular pipe passes through the drying outer cylinder and is rotatably connected to the drying inner cylinder, and is located at the drive motor. Outside the output shaft of the machine, a discharge pipe is connected to the center of the other shaft end of the drying outer cylinder. A drying component is provided on the lower side between the drying outer cylinder and the drying inner cylinder, which can dry the krill powder. A suction component is provided at the upper end of the drying outer cylinder, which communicates with the inside of the drying inner cylinder, and can perform micro-vacuum suction inside the drying inner cylinder, while simultaneously sucking out the water vapor inside the drying inner cylinder. A heat source component is provided outside the drying outer cylinder, which communicates with the drying component, and can quickly heat the drying component. A conveying component is provided between the drying inner cylinder and the discharge pipe, and can convey and export the krill powder inside the drying inner cylinder.

[0006] Preferably, the drying assembly includes air ring grooves, and multiple air ring grooves are formed on the outer wall of the cylindrical inner drying cylinder. Multiple air jet mesh holes are provided between the inner ends of the multiple air ring grooves and the inner drying cylinder. Air guide rings are rotatably connected inside the multiple air ring grooves, and rubber sealing rings are provided between the air guide rings. Multiple limiting rings are rotatably connected to the outside of the inner drying cylinder between the multiple air ring grooves.

[0007] Preferably, multiple resistance-reducing ball bearings are provided between the multiple limiting rings and the outer wall of the drying inner cylinder, and multiple pressurizing air chambers are opened on the lower inner wall of the multiple air guide rings. Each of the multiple pressurizing air chambers is connected to an air guide pipe that passes through the lower outer end of the drying outer cylinder, and an arc-shaped connecting pipe is connected to the outside of the multiple air guide pipes.

[0008] Preferably, each of the multiple pressurized air chambers has an air storage pipe connected to its outer end, and each of the multiple air storage pipes has a pressure storage spring inside its outer end. Each of the multiple pressure storage springs has an air storage piston that is slidably connected inside the air storage pipe, and each of the multiple air storage pipes and the multiple air storage pistons has a rubber sealing ring.

[0009] Preferably, the suction assembly includes suction pipes, and the upper ends of the plurality of air guide rings are connected to suction pipes that penetrate the upper part of the drying outer cylinder. The suction pipes are connected to a filter box located on the upper side of the drying outer cylinder, and the lower ends of the plurality of suction pipes are opened through the air guide rings and communicate with the air ring grooves.

[0010] Preferably, the upper end of the air filter box is connected to a suction cylinder, and each suction cylinder is equipped with a suction fan and a protective net. The suction fan is electrically connected to an external power source through a wiring harness, and the protective net is located at the outer end of the suction fan and inside the opening of the air filter box. A filter plate is inserted inside the air filter box.

[0011] Preferably, the heat source assembly includes a gas distribution pipe, one end of a plurality of the connecting pipes is connected to a gas distribution pipe located outside the drying outer cylinder, and a heating cylinder is inserted into the axial end of the gas distribution pipe. The end of the heating cylinder located outside the gas distribution pipe is connected to a limiting seat, and the limiting seat is connected to the gas distribution pipe by bolts. A gas dispersing pipe is inserted inside the heating cylinder and the limiting seat, and a plurality of gas dispersing holes opened on the outer wall are connected to the outside of the gas dispersing pipe.

[0012] Preferably, the end of the air distribution pipe located outside the limiting seat is connected to a fan housing. The fan housing is connected to the air distribution pipe and the limiting seat by bolts and flanges. Multiple air inlets are provided on the cylindrical outer wall of the fan housing away from the limiting seat. A fan motor is connected to the end of the fan housing away from the limiting seat by bolts and flanges. The fan motor is connected to a high-pressure fan located inside the fan housing through an output shaft.

[0013] Preferably, the conveying assembly includes guide plates. Multiple guide plates are spirally distributed on the cylindrical inner wall of the drying inner cylinder, and the multiple guide plates are located between multiple air ring grooves. Multiple arc-shaped scraping plates are connected inside the drying inner cylinder near the discharge pipe. A connecting plate is connected to the center of the inner end of the multiple scraping plates, and a spiral pusher plate rotatably connected inside the discharge pipe is connected through the connecting plate. A pipe liner is inserted inside the discharge pipe between the multiple scraping plates and the spiral pusher plate, and a material collection port is opened on the inner side of the upper end of the pipe liner.

[0014] A vacuum drying method for krill powder, comprising the following steps:

[0015] Step 1: Vacuuming. The krill powder to be dried is introduced into the drying cylinder through the feed hopper, and a micro-vacuum is formed inside the drying cylinder by the suction component, while the steam evaporated inside the drying cylinder is sucked out.

[0016] Step 2: Drying. The inner drying cylinder is driven by a drive motor to rotate inside the outer drying cylinder, and the krill powder inside the inner drying cylinder is heated and dried by the cooperation of the heat source component and the drying component.

[0017] Step 3: Exporting. The krill powder inside the drying cylinder is conveyed to the discharge pipe side by the conveying component and then exported through the discharge pipe.

[0018] Compared with the prior art, the present invention provides a vacuum drying apparatus and method for processing krill powder, which has the following beneficial effects:

[0019] 1. This invention features multiple air ring grooves on the outer wall of the drying inner cylinder and multiple air jet mesh holes between the air ring grooves and the drying inner cylinder. This allows multiple pressurized air chambers on the lower inner wall of the air guide ring to intermittently connect with the interior of the drying inner cylinder through the multiple air jet mesh holes as the inner cylinder rotates. This causes the hot air introduced into the pressurized air chambers to be pressurized and ejected during the connection and misalignment with the air jet mesh holes, forming an intermittent high-pressure hot air jet on the krill powder. This not only breaks up the krill powder to prevent clumping but also makes the heating more uniform through gas stirring, thereby improving drying efficiency and drying effect.

[0020] 2. In this invention, an air extraction pipe and a filter box are connected to the upper end of the air guide ring. The air extraction pipe can be connected to the drying inner cylinder through multiple air jet holes rotated to the upper side. This allows the air extraction pipe to draw air from the drying inner cylinder through the air jet holes, creating a micro-vacuum state inside the drying inner cylinder, which improves the efficiency of moisture evaporation. At the same time, it extracts water vapor and odors from the drying inner cylinder and collects them inside the filter box for filtration by a filter plate. The filter plate can be replaced to ensure a continuous and efficient filtration effect.

[0021] 3. This invention uses a high-pressure fan in the fan casing to draw in external air and form high-pressure air which is then introduced into the diffuser pipe. The air then enters the distribution pipe through the diffuser holes for heating and distribution, and finally enters multiple connecting pipes to provide a stable drying heat source for the drying components.

[0022] 4. This invention uses spirally distributed guide plates to push krill powder to one side, and uses an arc-shaped shovel plate to scoop up the dried krill powder and guide it into the inner lining of the pipe through the collection port. Finally, by driving the spiral pusher plate to rotate, the krill powder is pushed out into the discharge pipe, thus achieving automatic continuous discharge. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the air drying device of the present invention.

[0024] Figure 2 This is a three-dimensional cross-sectional view of the air drying device of the present invention.

[0025] Figure 3 This is a schematic diagram of the connection structure of the drying inner cylinder of the present invention.

[0026] Figure 4 This is a schematic diagram of the connection structure between the air ring groove and the air jet mesh of the present invention.

[0027] Figure 5 This is a schematic diagram of the connection structure between the air guide ring and the limiting ring of the present invention.

[0028] Figure 6 This is a schematic cross-sectional view of the air drying device of the present invention.

[0029] Figure 7 This is a schematic diagram of the connection structure between the drying component and the air extraction component of the present invention.

[0030] Figure 8 This is a schematic diagram of the connection structure of the drying outer cylinder of the present invention.

[0031] Figure 9 This is a schematic diagram of the air guide ring connection structure of the present invention.

[0032] Figure 10 For the present invention Figure 9 Enlarged diagram of point A in the middle.

[0033] Figure 11 This is a schematic diagram of the connection structure between the drying component and the heat source component of the present invention.

[0034] Figure 12 This is a schematic diagram of the heat source component structure of the present invention.

[0035] Figure 13 This is a schematic diagram of the transmission component structure of the present invention.

[0036] In the diagram: 1. Drying outer cylinder; 2. Support leg; 3. Drying inner cylinder; 4. Drive motor; 5. Feed hopper; 6. Discharge pipe; 7. Air ring groove; 8. Air jet mesh; 9. Air guide ring; 10. Limiting ring; 11. Drag-reducing ball bearing; 12. Pressurizing air chamber; 13. Air guide pipe; 14. Connecting pipe; 15. Air storage pipe; 16. Pressure accumulator spring; 17. Air storage piston; 18. Extraction pipe; 19. Air filter box; 20. Suction cylinder; 21. Filter plate; 22. Air distribution pipe; 23. Heating cylinder; 24. Limiting seat; 25. Air dispersing pipe; 26. Air dispersing hole; 27. Fan shell; 28. Air inlet; 29. ​​Fan motor; 30. High-pressure fan; 31. Guide plate; 32. Material scraper plate; 33. Connecting plate; 34. Spiral pusher plate; 35. Pipe liner; 36. Material collection port. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] This invention provides, for example Figures 1-13The vacuum drying device for krill powder processing shown includes a drying outer cylinder 1, with support legs 2 connected to the lower sides of both shaft ends of the drying outer cylinder 1. A drying inner cylinder 3 is rotatably connected inside the drying outer cylinder 1. A drive motor 4 is installed outside the drying outer cylinder 1 and connected inside the support legs 2. The drive motor 4 is connected to the center of one shaft end of the drying inner cylinder 3 via an output shaft that passes through the interior of the drying outer cylinder 1. A feed hopper 5 is provided between the drying outer cylinder 1 and the drive motor 4, and the feed hopper 5 is connected to the outer wall of the drying outer cylinder 1 and connected to an annular pipe that communicates with the drying inner cylinder 3. The annular pipe passes through the drying inner cylinder 3. The outer cylinder 1 is rotatably connected to the inner drying cylinder 3 and is located outside the output shaft of the drive motor 4. A discharge pipe 6 is connected to the center of the other shaft end of the outer drying cylinder 1. A drying assembly is installed on the lower side between the outer drying cylinder 1 and the inner drying cylinder 3, which can dry the krill powder. A suction assembly connected to the inside of the inner drying cylinder 3 is installed at the upper end of the outer drying cylinder 1, which can perform micro-vacuum suction inside the inner drying cylinder 3 and simultaneously remove water vapor from inside the inner drying cylinder 3. A heat source assembly connected to the drying assembly is installed outside the outer drying cylinder 1, which can rapidly heat the drying assembly. A conveying assembly is installed between the inner drying cylinder 3 and the discharge pipe 6 for heating. This assembly conveys and discharges the krill powder inside the inner drying cylinder 3. During the drying process, the drive motor 4 is electrically connected to an external power source via a wiring harness. The krill powder is fed into the inner drying cylinder 3 inside the outer drying cylinder 1 through the feed hopper 5 and its lower annular pipe. Then, the drive motor 4 is started, and it drives the inner drying cylinder 3 to rotate inside the outer drying cylinder 1 via its output shaft, causing the krill powder to tumble inside the inner drying cylinder 3. At this time, the exhaust assembly vents air into the inner drying cylinder 3. The system performs air extraction while simultaneously heating the drying components. The drying components heat the krill powder inside the drying inner cylinder 3 and convey it to the discharge pipe 6 via the conveying components. This creates a micro-vacuum state inside the drying inner cylinder 3. As the drying inner cylinder 3 rotates and is driven by the conveying components, the krill powder tumbles, heats, and moves towards the discharge pipe 6, rapidly evaporating the internal moisture and achieving the drying purpose. The evaporated water vapor is extracted by the air extraction components, and the dried krill powder is discharged through the discharge pipe 6 guided by the conveying components.

[0039] like Figures 3-10As shown, the drying assembly includes air ring grooves 7. Multiple air ring grooves 7 are formed on the outer cylindrical wall of the drying inner cylinder 3. Multiple air jet mesh holes 8 are provided between the inner ends of the multiple air ring grooves 7 and the drying inner cylinder 3. Air guide rings 9 are rotatably connected inside each of the multiple air ring grooves 7, and rubber sealing rings are provided between them. Multiple limiting rings 10 are rotatably connected to the outside of the drying inner cylinder 3 between the multiple air ring grooves 7. Multiple drag-reducing ball bearings 11 are provided inside each of the multiple limiting rings 10 and the outer wall of the drying inner cylinder 3. Multiple pressurizing air chambers are formed on the lower inner wall of the multiple air guide rings 9. 12. Each of the multiple pressurized air chambers 12 has an air guide pipe 13 connected to one side of its outer end, which extends through the lower part of the drying outer cylinder 1. The air guide pipes 13 are connected to an arc-shaped connecting pipe 14. Each of the multiple pressurized air chambers 12 has an air storage pipe 15 connected to the other side of its outer end. Each air storage pipe 15 has a pressure accumulating spring 16 installed inside its outer end. Each pressure accumulating spring 16 has an air storage piston 17 slidably connected inside its inner end. A rubber sealing ring is installed between each air storage pipe 15 and each air storage piston 17. During the heating process of the krill powder, the drying inner cylinder 3 is heated by multiple air accumulating springs 13. A limiting ring 10 is supported and rotatably connected inside the drying outer cylinder 1. The limiting ring 10 can reduce the rotational resistance between itself and the drying inner cylinder 3 through multiple resistance-reducing balls 11. The heat source assembly supplies hot air to multiple connecting pipes 14 and introduces the hot air into multiple air guide pipes 13 through the multiple connecting pipes 14. Then, the hot air is introduced into multiple pressurized air chambers 12 opened on the lower inner wall of the air guide ring 9 through the multiple air guide pipes 13. Since the air guide ring 9 is rotatably connected inside the air ring groove 7 and a rubber sealing ring is provided between it and the air ring groove 7, and the pressurized air chamber 12 can reduce the rotational resistance between itself and the air jet mesh 8 through the multiple air jet mesh 8, the limiting ring 10 can reduce the rotational resistance between itself and the air jet mesh 8 through the multiple air jet mesh 11. The air chamber 12 is connected to the inner wall of the drying cylinder 3. A rubber sealing ring is provided between the inner wall of the pressurizing air chamber 12 and the inner wall of the air ring groove 7. Therefore, when the air jet mesh 8 is not rotated to coincide with the pressurizing air chamber 12, the opening of the pressurizing air chamber 12 is blocked by the inner wall of the air ring groove 7 and is not connected to the air jet mesh 8. This prevents the hot air introduced into the pressurizing air chamber 12 from being discharged, resulting in an increase in air pressure inside the pressurizing air chamber 12 to form high-pressure hot air. The high-pressure hot air can overcome the elastic force of the accumulating spring 16 and push the accumulating piston 17 outward to enter the accumulating pipe 15 for accumulating air. At the same time, it is pressurized by the compressed accumulating spring 16.

[0040] Furthermore, when the jet mesh 8 rotates to coincide with the pressurizing air chamber 12, the pressurizing air chamber 12 is connected to the jet mesh 8 and to the interior of the drying inner cylinder 3 through the jet mesh 8. This allows the pressurizing air chamber 12 to inject high-pressure hot air into the interior of the drying inner cylinder 3 through the jet mesh 8. At the same time, the hot air inside the air storage pipe 15 can be squeezed out by the rebound of the pressure storage spring 16 and the inward sliding of the air storage piston 17. This allows the multiple jet meshes 8, which have rotated to the lower side of the drying inner cylinder 3, to spray out high-pressure, high-temperature hot air when they coincide with the pressurizing air chamber 12. This heats the krill powder tumbling inside the drying inner cylinder 3, thereby evaporating the moisture inside the krill powder and drying it.

[0041] The high-temperature, high-pressure hot air ejected through multiple jet mesh holes 8 located on the lower side of the drying inner cylinder 3 impacts the krill powder upwards. This allows the high-temperature, high-pressure hot air to both disperse the krill powder and prevent it from clumping, and to lift the krill powder upwards for gas agitation, thereby improving heating uniformity, drying efficiency, and drying effect.

[0042] Furthermore, multiple air jet meshes 8 can simultaneously rotate to be completely misaligned with multiple pressurized air chambers 12, and can simultaneously rotate to coincide with multiple pressurized air chambers 12. This allows multiple air jet meshes 8 to repeatedly open and close with multiple pressurized air chambers 12 during the rotation of the inner drying cylinder 3. This allows the pressurized air chambers 12 to repeatedly store, pressurize, release, and depressurize air. This allows multiple air jet meshes 8 that have rotated to the lower side of the inner drying cylinder 3 to intermittently spray high-temperature and high-pressure hot air to rapidly and evenly heat the krill powder. Moreover, the air jet meshes 8 have a double-layer mesh structure, preventing the krill powder from leaking out through the mesh openings of the air jet meshes 8.

[0043] like Figures 2-7As shown, the suction assembly includes suction pipes 18. Multiple air guide rings 9 are each connected to a suction pipe 18 that penetrates the upper part of the drying outer cylinder 1. These suction pipes 18 connect to a filter box 19 located on the upper side of the drying outer cylinder 1. The lower openings of the suction pipes 18 penetrate the air guide rings 9 and communicate with the air ring grooves 7. A suction cylinder 20 is connected to the upper end of the filter box 19. Each suction cylinder 20 contains a suction fan and a protective net. The suction fan is electrically connected to an external power source via a wiring harness. The protective net is located outside the suction fan and inside the opening of the filter box 19. A filter plate 21 is inserted inside the filter box 19. During the suction process inside the drying inner cylinder 3... The suction fan inside the suction cylinder 20 is electrically connected to an external power source via a wiring harness. When the suction fan is activated, multiple suction fans extract air from the air filter box 19 and create a negative pressure inside the multiple suction pipes 18 through the air filter box 19. When the multiple air jet holes 8 rotate to the upper side of the drying inner cylinder 3 and to the position of the suction pipe 18, the suction pipe 18 can communicate with the inside of the drying inner cylinder 3 through the multiple air jet holes 8 and extract air from the inside of the drying inner cylinder 3, thereby creating a micro-vacuum state inside the drying inner cylinder 3, improving the water evaporation efficiency, and extracting and collecting the water vapor and odors evaporated inside the drying inner cylinder 3 into the air filter box 19, and finally discharging them through the suction cylinder 20.

[0044] The suction fan inside the suction cylinder 20 is protected by a protective net. The water vapor and odor collected inside the air filter box 19 can be filtered by the filter plate 21. The filter plate 21 can be pulled out from inside the air filter box 19 for maintenance and replacement to prevent water saturation and ensure the filtration efficiency of water vapor and odor.

[0045] like Figure 11 and Figure 12As shown, the heat source assembly includes a gas distribution pipe 22. Multiple connecting pipes 14 are connected at one end to the gas distribution pipe 22 located outside the drying outer cylinder 1. A heating cylinder 23 is inserted into one axial end of the gas distribution pipe 22. A limiting seat 24 is connected to the end of the heating cylinder 23 outside the gas distribution pipe 22, and the limiting seat 24 is connected to the gas distribution pipe 22 by bolts. A diffuser pipe 25 is inserted inside the heating cylinder 23 and the limiting seat 24. Multiple diffuser holes 26 are connected to the outside of the diffuser pipe 25 on its outer wall. A fan housing 27 is connected to the end of the diffuser pipe 25 outside the limiting seat 24. The fan housing 27 is connected to the gas distribution pipe 22 and the limiting seat 24 by bolts and flanges. Multiple air inlets 28 are provided on the cylindrical outer wall of the fan housing 27 away from the limiting seat 24. A fan motor 29 is connected to the end of the fan housing 27 away from the limiting seat 24 by bolts and flanges. The fan motor 29 is connected to a fan located inside the fan housing 27 via an output shaft. During the heating process of the drying components, the high-pressure fan 30 of the unit has its fan motor 29 electrically connected to an external power source via a wiring harness. The limit seat 24 is equipped with an electrical connector that is electrically connected to the heating cylinder 23. It can be electrically connected to an external power source via the electrical connector and wiring harness. When the limit seat 24 and the fan motor 29 are started, the limit seat 24 supplies power to the heating cylinder 23, causing the heating cylinder 23 to generate heat. At the same time, the fan motor 29 drives the high-pressure fan 30 to rotate inside the fan housing 27 through the output shaft. The fan housing 27 draws in external air through the air inlet 28 and generates high-pressure air that blows into the air distribution pipe 25 through the rotation of the high-pressure fan 30. The high-pressure air blown into the air distribution pipe 25 can be evenly distributed into the air distribution pipe 22 through multiple air outlets 26 and heated by the external heating cylinder 23. Finally, it is introduced into multiple connecting pipes 14 to provide a heat source for the drying components.

[0046] like Figure 2 , Figure 3 , Figure 6 and Figure 13As shown, the conveying assembly includes guide plates 31. Multiple guide plates 31 arranged in a spiral pattern are connected to the cylindrical inner wall of the drying inner cylinder 3, and these guide plates 31 are located between multiple air ring grooves 7. Multiple arc-shaped scraping plates 32 are connected inside the drying inner cylinder 3 near the discharge pipe 6, and a connecting plate 33 is connected to the center of the inner end of each scraping plate 32. A spiral pusher plate 34, rotatably connected inside the discharge pipe 6, is connected through the connecting plate 33. A pipe liner 35 is inserted inside the discharge pipe 6, located between the multiple scraping plates 32 and the spiral pusher plate 34, and the inner side of the upper end of the pipe liner 35 is open. The device is equipped with a collection port 36. During the conveying process of krill powder, when the krill powder is tumbling and drying inside the drying inner cylinder 3, the krill powder can be pushed and guided by multiple spirally distributed guide plates 31, allowing the krill powder to move towards the discharge pipe 6 inside the drying inner cylinder 3. When the krill powder moves to the end of the drying inner cylinder 3 close to the discharge pipe 6, the drying inner cylinder 3 can lift the krill powder by multiple internally connected arc-shaped shovel plates 32, and slide it inward as the shovel plates 32 rotate, while falling into the inner lining 35 of the pipe through the collection port 36 for collection.

[0047] Furthermore, when the krill powder falls into the inner lining 35 of the tube, the spiral pusher plate 34 inside the inner lining 35 rotates under the drive of the shovel plate 32 and the connecting plate 33, and pushes the krill powder falling into the inner lining 35 outward through rotation, thereby pushing the krill powder out of the discharge pipe 6 and then exporting the dried krill powder.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vacuum drying device for krill powder processing, comprising a drying outer cylinder (1), wherein support legs (2) are connected to the lower sides of both shaft ends of the drying outer cylinder (1), and a drying inner cylinder (3) is rotatably connected inside the drying outer cylinder (1). A drive motor (4) is provided outside the drying outer cylinder (1) and connected inside the support legs (2). The drive motor (4) is connected to the center of one shaft end of the drying inner cylinder (3) through an output shaft, and the output shaft passes through the interior of the drying outer cylinder (1). A feed hopper (5) is provided between the drying outer cylinder (1) and the drive motor (4), and the feed hopper (5) is connected to the outer wall of the drying outer cylinder (1) and connected to an annular pipe communicating with the drying inner cylinder (3). The annular pipe passes through the drying outer cylinder (1) and is rotatably connected to the drying inner cylinder (3), and is located outside the output shaft of the drive motor (4). A discharge pipe (6) is connected to the center of the other shaft end of the drying outer cylinder (1). A drying assembly is provided on the lower side between the drying outer cylinder (1) and the drying inner cylinder (3), and the krill powder can be dried through the drying assembly; The upper end of the drying outer cylinder (1) is provided with a suction component that communicates with the inside of the drying inner cylinder (3), and can perform micro-vacuum suction on the inside of the drying inner cylinder (3) through the suction component, while simultaneously sucking out the water vapor inside the drying inner cylinder (3). The drying outer cylinder (1) is provided with a heat source component that is connected to the drying component, and can quickly heat the drying component through the heat source component; A conveying assembly is provided between the drying inner cylinder (3) and the discharge pipe (6), and the krill powder inside the drying inner cylinder (3) can be conveyed and discharged through the conveying assembly.

2. The vacuum drying apparatus for krill powder processing as described in claim 1, characterized in that, The drying assembly includes an air ring groove (7). Multiple air ring grooves (7) are provided on the outer cylindrical wall of the drying inner cylinder (3). Multiple air jet mesh holes (8) are provided between the inner end of the multiple air ring grooves (7) and the drying inner cylinder (3). A guide ring (9) is rotatably connected inside the multiple air ring grooves (7), and a rubber sealing ring is provided between the guide ring (9). Multiple limiting rings (10) are rotatably connected to the outside of the drying inner cylinder (3) between the multiple air ring grooves (7).

3. The vacuum drying apparatus for krill powder processing as described in claim 2, characterized in that, Multiple resistance-reducing ball bearings (11) are provided between the multiple limiting rings (10) and the outer wall of the drying inner cylinder (3). Multiple pressurizing air chambers (12) are opened on the lower inner wall of the multiple air guide rings (9). Each of the multiple pressurizing air chambers (12) is connected to an air guide pipe (13) that passes through the lower outer wall of the drying outer cylinder (1). An arc-shaped connecting pipe (14) is connected to the outside of the multiple air guide pipes (13).

4. The vacuum drying apparatus for krill powder processing as described in claim 3, characterized in that, Each of the multiple pressurized air chambers (12) is connected to an air storage pipe (15) on the other side of its outer end. Each of the multiple air storage pipes (15) is equipped with a pressure storage spring (16) inside its outer end. Each of the multiple pressure storage springs (16) is equipped with an air storage piston (17) that is slidably connected inside the air storage pipe (15). Each of the multiple air storage pipes (15) and the multiple air storage pistons (17) is equipped with a rubber sealing ring.

5. The vacuum drying apparatus for krill powder processing as described in claim 2, characterized in that, The suction assembly includes a suction pipe (18), and the upper ends of multiple air guide rings (9) are connected to suction pipes (18) that pass through the upper outside of the drying outer cylinder (1). The suction pipes (18) are connected to a filter box (19) located on the upper side of the drying outer cylinder (1), and the lower openings of the multiple suction pipes (18) pass through the air guide rings (9) and are connected to the air ring groove (7).

6. The vacuum drying apparatus for krill powder processing as described in claim 5, characterized in that, The upper end of the air filter box (19) is connected to a suction cylinder (20), and each suction cylinder (20) is equipped with a suction fan and a protective net. The suction fan is electrically connected to an external power source through a wire harness, and the protective net is located at the outer end of the suction fan and inside the opening of the air filter box (19). A filter plate (21) is inserted inside the air filter box (19).

7. The vacuum drying apparatus for krill powder processing as described in claim 3, characterized in that, The heat source assembly includes a gas distribution pipe (22), one end of a plurality of the connecting pipes (14) is connected to the gas distribution pipe (22) located outside the drying outer cylinder (1), and a heating cylinder (23) is inserted into one axial end of the gas distribution pipe (22). The end of the heating cylinder (23) located outside the gas distribution pipe (22) is connected to a limiting seat (24), and the limiting seat (24) is connected to the gas distribution pipe (22) by bolts. A gas dispersing pipe (25) is inserted inside the heating cylinder (23) and the limiting seat (24), and a plurality of gas dispersing holes (26) opened on the outer wall are connected to the outside of the gas dispersing pipe (25).

8. The vacuum drying apparatus for krill powder processing as described in claim 7, characterized in that, The air distribution pipe (25) is connected to a fan housing (27) at one end outside the limiting seat (24). The fan housing (27) is connected to the air distribution pipe (22) and the limiting seat (24) by bolts and flanges. Multiple air inlets (28) are provided on the cylindrical outer wall of the fan housing (27) away from the limiting seat (24). The fan motor (29) is connected to the end of the fan housing (27) away from the limiting seat (24) by bolts and flanges. The fan motor (29) is connected to a high-pressure fan (30) located inside the fan housing (27) through the output shaft.

9. The vacuum drying apparatus for krill powder processing as described in claim 1, characterized in that, The conveying assembly includes a guide plate (31). Multiple guide plates (31) are connected to the cylindrical inner wall of the drying inner cylinder (3) in a spiral arrangement. The multiple guide plates (31) are located between multiple air ring grooves (7). Multiple arc-shaped scraper plates (32) are connected to the inner end of the drying inner cylinder (3) near the discharge pipe (6). A connecting plate (33) is connected to the center of the inner end of the multiple scraper plates (32). A spiral pusher plate (34) is rotatably connected to the discharge pipe (6) through the connecting plate (33). A pipe liner (35) is inserted into the discharge pipe (6) between the multiple scraper plates (32) and the spiral pusher plate (34). A collection port (36) is opened on the inner side of the upper end of the pipe liner (35).

10. A vacuum drying method for krill powder according to any one of claims 1-9, characterized in that, The steps are as follows: Step 1: Vacuuming. The krill powder to be dried is introduced into the drying inner cylinder (3) through the feed hopper (5), and a micro-vacuum is formed inside the drying inner cylinder (3) by the suction component. At the same time, the steam evaporated inside the drying inner cylinder (3) is sucked out. Step 2: Drying. The inner drying cylinder (3) is driven to rotate inside the outer drying cylinder (1) by the drive motor (4), and the krill powder inside the inner drying cylinder (3) is heated and dried by the cooperation of the heat source component and the drying component. Step 3: Exporting. The krill powder inside the drying inner cylinder (3) is conveyed to the discharge pipe (6) side by the conveying component and exported through the discharge pipe (6).

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