Spray freeze dryer

By designing a spray freeze dryer, the atomized nozzle and refrigerator are used to quickly reduce the temperature, so that the materials can quickly freeze and freeze dry, solving the problem of long and blocked time of the existing freeze dryer, and achieving efficient and energy-saving drying effects.

CN222777610UActive Publication Date: 2025-04-22HANGZHOU ANYAN INSTR MFG CO LTD
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Patent Information

Application Number
CN202420540417.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-20
Publication Date
2025-04-22
Estimated Expiration
2034-03-20

AI Technical Summary

Technical Problem

The existing freeze-drying machine has a long freeze-drying time, and the dried materials are prone to blocks, and additional crushing processes are required, which increases production costs and time.

Method used

A spray freeze-dryer is designed, including a drying tower, atomized nozzle, a refrigerator, a fan, a vacuum pump and a freeze-dryer. The material is atomized through the atomized nozzle, and the temperature in the drying tower is quickly reduced by using the refrigerator and the fan, so that the material can quickly freeze and freeze dry, reducing the risk of blocking and drying time.

Benefits of technology

The rapid freeze-drying of materials is achieved, which reduces drying time, avoids blocking problems, and reduces production costs through time saving and energy efficient.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a spray freeze dryer which comprises a drying tower, a top plate is welded to the top of the outer surface of the drying tower, an atomizing spray pipe is welded to the end, away from the top plate, of the top of the outer surface of the drying tower, and the top plate is connected with a refrigerating machine through bolts. The output end of the refrigerating machine is connected with a hollow pipe through an air inlet pipe, a draught fan is arranged between the hollow pipe and the refrigerating machine, the bottom end of the draught fan is welded to the top plate, the hollow pipe is welded to one end of the drying tower, and materials can enter the drying tower through the atomizing spray pipe. Meanwhile, cooling gas in the refrigerating machine quickly enters the drying tower under the action of the fan, so that the gas is in contact with the atomized liquid material and is quickly frozen to form small ice crystal particles, the surface area of the material is increased, the problems that the material is blocky and the freeze-drying time is long are further solved, the activity of the special material is reserved, and the freeze-drying efficiency is improved. And time is saved, and high efficiency and energy conservation are achieved.
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Description

Technical Field

[0001] The utility model relates to the technical field related to dryers, and in particular to a spray freeze dryer. Background Art

[0002] The spray freeze dryer is mainly suitable for low-temperature drying of heat-sensitive, viscous, active materials and materials with high sugar content, such as Chinese herbal natural product extracts, dairy products, biological preparations, enzyme preparations, fruit juice, polymer materials, etc.

[0003] It is often used in the chemical, food and other industries to spray the solution into mist from equipment such as atomizing spray guns or centrifugal atomizers, and then make it contact with cold air under vacuum to freeze and form small ice crystal particles, which are then freeze-dried to form granular powder and collected by certain methods.

[0004] However, for existing freeze dryers, the freeze drying time is long, generally more than 30 hours, and the freeze dried material tends to become lumps. If a powdered product is required, a crushing process is required, thereby increasing production costs and time costs. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model proposes a spray freeze dryer to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A spray freeze dryer comprises a drying tower, wherein a top plate is welded to the top of the outer surface of the drying tower, an atomizing nozzle is welded to the end of the top of the outer surface of the drying tower away from the top plate, an adjusting device is installed at the bottom end of the atomizing nozzle, the top plate is connected to a refrigerator by bolts, the output end of the refrigerator is connected to a hollow tube by an air inlet pipe, a fan is arranged between the hollow tube and the refrigerator, the bottom end of the fan is welded to the top plate, the hollow tube is welded to one end of the drying tower, the end of the drying tower away from the hollow tube is connected to a vacuum pump by a connecting pipe, a freeze dryer is arranged between the vacuum pump and the hollow tube, a stirring device is installed on the other end of the drying tower, the end of the drying tower away from the stirring device is connected to a wandering air separator by a collecting pipe, and the bottom end of the wandering air separator is connected to a collecting bottle by bolts.

[0008] Furthermore, in order to make the material enter the drying tower evenly, the adjusting device includes a support plate welded to the bottom end of the outer surface of the atomizing nozzle, the support plate is connected to the driving motor by bolts, the output end of the driving motor is connected to the driving gear through a driving shaft, and the bottom end of the atomizing nozzle is movably connected to a nozzle.

[0009] Furthermore, in order to ensure that the gas generated by the refrigerator is in full contact with the material, the stirring device includes a stirring motor fixedly connected to the other end of the outer surface of the drying tower, the output end of the stirring motor is connected to the hollow shaft by bolts, stirring rods are welded at equal distances on the outer surface of the hollow shaft, and air dispersion outlets are opened at equal distances on the stirring rods.

[0010] Furthermore, in order to rotate the nozzle, a connecting gear is fixedly connected to the top of the outer surface of the nozzle, and the connecting gear is meshed with the driving gear.

[0011] Furthermore, in order to allow the gas generated by the refrigerator to flow into the drying tower, one end of the hollow shaft away from the stirring motor extends into the interior of the hollow tube and is movably connected to the interior of the hollow tube, and an air inlet is opened on the outer surface of the hollow shaft at an equal distance from the same position of the hollow tube.

[0012] Furthermore, in order to keep the drying tower at a low temperature at all times, a heat-insulating layer is provided on the outer surface of the drying tower.

[0013] Furthermore, in order to stabilize the drying tower on the ground, a base is welded on the bottom end of the outer surface of the insulation layer, and supporting legs are welded around the bottom of the base.

[0014] Beneficial effects of the utility model:

[0015] 1. The material can enter the drying tower through the atomizing nozzle. The atomizing nozzle can make the material appear in atomized liquid state. At the same time, the cooling gas inside the refrigerator quickly enters the drying tower under the action of the fan, so that the temperature in the drying tower is lower than -18°C, so that it contacts with the atomized liquid material and quickly freezes to form small ice crystal particles, thereby increasing the surface area of ​​the material, and is collected in the collection bottle through the floating air separator. At this time, the vacuum pump starts to work, so that the collection bottle is in a vacuum state. At the same time, the freeze dryer quickly freezes and dries the small ice crystal particles to generate powdered or granular products, further solving the problem of material block and long freeze-drying time, retaining the activity of special materials, saving time, and being highly efficient and energy-saving.

[0016] 2. The material flows into the drying tower through the atomizing nozzle. At this time, the driving motor drives the driving shaft to rotate, so that the driving gear rotates synchronously with the driving shaft. The driving gear meshes with the connecting gear. The rotation of the driving gear drives the nozzle to rotate on the atomizing nozzle, so that the material is evenly sprayed into the drying tower, further improving the drying effect of the spray freeze dryer.

[0017] 3. The gas generated by the refrigerator flows to the hollow tube under the action of the fan. The gas entering the hollow tube enters the hollow shaft through the air inlet, and then flows into the drying tower through the air dispersion port on the stirring rod. At the same time, the stirring motor drives the hollow shaft to rotate, so that the stirring rod rotates synchronously with the hollow shaft. The rotation of the stirring rod makes the material fully contact with the gas, thereby improving the drying effect of the spray freeze dryer, and on the other hand, the gas is evenly dispersed in the drying tower, thereby improving the contact efficiency between the material and the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0019] Figure 1 It is a structural schematic diagram of a spray freeze dryer according to an embodiment of the utility model;

[0020] Figure 2 It is a partial cross-sectional view of a spray freeze dryer according to an embodiment of the utility model;

[0021] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 It is a schematic diagram of the internal structure of a hollow tube in a spray freeze dryer according to an embodiment of the utility model.

[0023] In the figure:

[0024] 1. Drying tower; 2. Top plate; 3. Refrigerator; 4. Fan; 5. Air inlet pipe; 6. Hollow pipe; 7. Air inlet; 8. Hollow shaft; 9. Stirring rod; 10. Air outlet; 11. Stirring motor; 12. Atomizing nozzle; 13. Support plate; 14. Drive motor; 15. Drive shaft; 16. Drive gear; 17. Connecting gear; 18. Nozzle; 19. Connecting pipe; 20. Vacuum pump; 21. Freeze dryer; 22. Collecting pipe; 23. Floating air separator; 24. Collecting bottle; 25. Insulation layer; 26. Base; 27. Support legs. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention clearly understood, the present invention is further described below in conjunction with specific implementation methods.

[0026] See also Figure 1 and Figure 2The utility model provides a technical solution: a spray freeze dryer, comprising a drying tower 1 with a cavity inside, in order to keep the drying tower 1 at a low temperature, a heat preservation layer 25 is provided on the outer surface of the drying tower 1, and a top plate 2 is welded on the top of the outer surface of the heat preservation layer 25, in order to stabilize the drying tower 1 on the ground, a base 26 is welded on the bottom end of the outer surface of the heat preservation layer 25, extension plates are welded on both ends of the outer surface of the base 26, support legs 27 are welded around the bottom of the base 26, and an atomizing nozzle 12 is welded on the end of the outer surface of the heat preservation layer 25 away from the top plate 2. The top of the atomizing nozzle 12 is connected to the atomizing spray gun, and the top plate 2 is connected to the refrigerator 3 by bolts. The refrigerator 3 is driven by a power source and can adjust the temperature in the drying tower 1. The output end of the refrigerator 3 is connected to the hollow tube 6 through the air inlet pipe 5. A fan 4 is arranged between the hollow tube 6 and the refrigerator 3. The fan 4 is driven by a power source. The bottom end of the fan 4 is welded to the top plate 2. The hollow tube 6 is welded to one end of the drying tower 1. The end of the drying tower 1 away from the hollow tube 6 is connected to the vacuum pump 20 through the connecting pipe 19. The vacuum pump 20 is driven by a power source. The vacuum pump 20 and the hollow tube 6 A freeze dryer 21 is arranged between them, and the freeze dryer 21 is driven by a power source. The vacuum pump 20 and the freeze dryer 21 are fixed on the extension plate by bolts. The other end of the drying tower 1 is connected to the wind separator 23 through a collecting pipe 22. The wind separator 23 is driven by a power source. The bottom end of the wind separator 23 is connected to the collecting bottle 24 by bolts. The bottom end of the collecting bottle 24 is installed on another extension plate by bolts. The material can enter the drying tower 1 through the atomizing nozzle 12. The atomizing nozzle 12 can make the material present in an atomized liquid state. At the same time, the cooling gas inside the refrigerator 3 is quickly evaporating under the action of the fan 4. Entering into the drying tower 1, so that the temperature in the drying tower 1 is lower than -18°C, it contacts with the atomized liquid material and quickly freezes to form small ice crystal particles, thereby increasing the surface area of ​​the material, and is collected into the collecting bottle 24 through the wind separator 23. At this time, the vacuum pump 20 starts to work, so that the collecting bottle 24 is in a vacuum state. At the same time, the freeze dryer 21 quickly freeze-dries the small ice crystal particles to generate powdered or granular products, further solving the problems of material block and long freeze-drying time, retaining the activity of special materials, saving time, and being highly efficient and energy-saving.

[0027] See also Figure 1-Figure 3In order to make the material enter the drying tower 1 evenly, an adjusting device is installed at the bottom end of the atomizing nozzle 12, and the adjusting device includes a support plate 13 welded on the bottom end of the outer surface of the atomizing nozzle 12, and the support plate 13 is connected to the driving motor 14 by bolts. The driving motor 14 is driven by a power supply, and the output end of the driving motor 14 is connected to the driving gear 16 through the driving shaft 15. The bottom end of the atomizing nozzle 12 is connected to the nozzle 18 through a bearing, and a connecting gear 17 is fixedly connected to the top of the outer surface of the nozzle 18. The connecting gear 17 is meshed with the driving gear 16. The material flows into the drying tower 1 through the atomizing nozzle 12. At this time, the driving motor 14 drives the driving shaft 15 to rotate, so that the driving gear 16 rotates synchronously with the driving shaft 15. Through the meshing of the driving gear 16 and the connecting gear 17, the rotation of the driving gear 16 drives the nozzle 18 to rotate on the atomizing nozzle 12, so that the material is evenly sprayed into the drying tower 1, further improving the drying effect of the spray freeze dryer.

[0028] See also Figure 1 , Figure 2 and Figure 4 In order to make the gas generated by the refrigerator 3 fully contact with the material, a stirring device is installed on the other end of the drying tower 1, and the stirring device includes a stirring motor 11 fixedly connected to the other end of the outer surface of the drying tower 1. The stirring motor 11 is driven by a power supply, and the output end of the stirring motor 11 is connected to the hollow shaft 8 by bolts. Stirring rods 9 are welded at equal distances on the outer surface of the hollow shaft 8, and air outlets 10 are opened at equal distances on the stirring rod 9. One end of the hollow shaft 8 away from the stirring motor 11 extends to the inside of the hollow tube 6 and is movably connected to the hollow tube 6. Air inlets 7 are provided at equal distances in the same position. The gas generated by the refrigerator 3 flows to the hollow tube 6 under the action of the fan 4. The gas entering the hollow tube 6 enters the hollow shaft 8 through the air inlet 7, and then flows into the drying tower 1 through the air dispersion port 10 on the stirring rod 9. At the same time, the stirring motor 11 drives the hollow shaft 8 to rotate, so that the stirring rod 9 rotates synchronously with the hollow shaft 8. The rotation of the stirring rod 9, on the one hand, makes the material fully contact with the gas, thereby improving the drying effect of the spray freeze dryer, and on the other hand, makes the gas evenly dispersed in the drying tower 1, thereby improving the contact efficiency between the material and the gas.

[0029] Working principle:

[0030] When the material is placed in the atomizing nozzle 12, at this time, the driving motor 14 drives the driving shaft 15 to rotate, so that the driving gear 16 rotates synchronously with the driving shaft 15, and the driving gear 16 is meshed with the connecting gear 17. The rotation of the driving gear 16 drives the nozzle 18 to rotate on the atomizing nozzle 12, so that the material is evenly sprayed into the drying tower 1, further improving the drying effect of the spray freeze dryer. At the same time, the gas generated by the refrigerator 3 flows to the hollow tube 6 under the action of the fan 4, and the gas entering the hollow tube 6 enters the hollow shaft 8 through the air inlet 7, and then flows into the drying tower 1 through the diffuser 10 on the stirring rod 9, so that the temperature in the drying tower 1 is lower than -18°C, and the stirring motor 11 drives the drying tower 1 to move the material to the drying tower 1. The hollow shaft 8 is driven to rotate, so that the stirring rod 9 rotates synchronously with the hollow shaft 8. The rotation of the stirring rod 9, on the one hand, makes the material fully contact with the gas, thereby improving the drying effect of the spray freeze dryer, and on the other hand, makes the gas evenly dispersed in the drying tower 1, thereby improving the contact efficiency between the material and the gas, thereby increasing the surface area of ​​the material, and collecting it in the collecting bottle 24 through the wind separator 23. At this time, the vacuum pump 20 starts to work, so that the collecting bottle 24 is in a vacuum state. At the same time, the freeze dryer 21 quickly freeze-dries the small ice crystal particles to generate a powdery or granular product, which further solves the problem of material block and long freeze-drying time, retains the activity of special materials, saves time, and is highly efficient and energy-saving.

[0031] Although this specification is described in accordance with the implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A spray freeze dryer, comprising a drying tower (1), characterized in that: A top plate (2) is welded to the top of the outer surface of the drying tower (1); an atomizing nozzle (12) is welded to the end of the top of the outer surface of the drying tower (1) away from the top plate (2); an adjusting device is installed at the bottom end of the atomizing nozzle (12); the top plate (2) is connected to the refrigerator (3) by bolts; the output end of the refrigerator (3) is connected to the hollow tube (6) through an air inlet pipe (5); a fan (4) is arranged between the hollow tube (6) and the refrigerator (3); the bottom end of the fan (4) is welded to the top plate (2); The hollow tube (6) is welded to one end of the drying tower (1); the end of the drying tower (1) away from the hollow tube (6) is connected to a vacuum pump (20) via a connecting tube (19); a freeze dryer (21) is provided between the vacuum pump (20) and the hollow tube (6); a stirring device is installed on the other end of the drying tower (1); the end of the drying tower (1) away from the stirring device is connected to a floating air separator (23) via a collecting tube (22); and the bottom end of the floating air separator (23) is connected to a collecting bottle (24) via bolts.

2. A spray freeze dryer according to claim 1, characterized in that: The regulating device comprises a support plate (13) welded to the bottom end of the outer surface of the atomizing nozzle (12); the support plate (13) is connected to a driving motor (14) via bolts; the output end of the driving motor (14) is connected to a driving gear (16) via a driving shaft (15); and the bottom end of the atomizing nozzle (12) is movably connected to a nozzle (18).

3. A spray freeze dryer according to claim 1, characterized in that: The stirring device comprises a stirring motor (11) fixedly connected to the other end of the outer surface of the drying tower (1), the output end of the stirring motor (11) being connected to the hollow shaft (8) by means of bolts, stirring rods (9) being welded at equal distances on the outer surface of the hollow shaft (8), and air dispersion outlets (10) being provided at equal distances on the stirring rod (9).

4. A spray freeze dryer according to claim 2, characterized in that: A connecting gear (17) is fixedly connected to the top of the outer surface of the nozzle (18), and the connecting gear (17) is meshed with the driving gear (16).

5. A spray freeze dryer according to claim 3, characterized in that: One end of the hollow shaft (8) away from the stirring motor (11) extends into the interior of the hollow tube (6) and is movably connected to the hollow tube (6). An air inlet (7) is provided on the outer surface of the hollow shaft (8) at the same position and at an equal distance from the hollow tube (6).

6. A spray freeze dryer according to claim 1, characterized in that: The outer surface of the drying tower (1) is provided with a heat-insulating layer (25).

7. A spray freeze dryer according to claim 6, characterized in that: A base (26) is welded to the bottom end of the outer surface of the thermal insulation layer (25), and supporting legs (27) are welded around the bottom of the base (26).