Aerogel processing and drying device

Abstract

The utility model relates to the technical field of aerogel processing, in particular to an aerogel processing and drying device, which adopts the technical scheme that the aerogel processing and drying device comprises a liquid nitrogen pool, a plurality of electric heating plates are fixedly mounted on two sides of the outer wall of the liquid nitrogen pool, a bottom frame is slidably mounted on the bottom surface of the liquid nitrogen pool, and hydraulic rods are fixedly mounted at four corners of the top surface of the bottom frame; the aerogel drying device has the advantages that the electric heating plate is started to heat liquid nitrogen in the liquid nitrogen pool, the temperature of the liquid nitrogen in the liquid nitrogen pool is in a gradual change trend, aerogel to be dried is placed on the top face of the drying partition plate, then the hydraulic rod is started to contract, the liquid nitrogen in the liquid nitrogen pool is heated, the liquid nitrogen in the liquid nitrogen pool is heated, the temperature of the liquid nitrogen in the liquid nitrogen pool is gradually changed, and the aerogel is dried. And finally, the propelling device drives the drying partition plate and the aerogel which sink into the liquid nitrogen pool to slowly move to the end, with the low temperature, of the liquid nitrogen pool, so that the effect of gradually cooling and drying the aerogel is achieved.

Description

Technical Field

[0001] This utility model relates to the field of aerogel processing technology, and specifically to an aerogel processing and drying device. Background Technology

[0002] Drying in aerogel processing refers to the process of removing the liquid (usually a solvent) from the aerogel precursor to form the final aerogel material. This process is crucial because improper drying methods can damage the aerogel's structure or reduce its properties. The main purpose of aerogel drying is to maintain its high porosity and lightweight properties while avoiding cracking or shrinkage during the drying process. Commonly used drying methods include supercritical drying, freeze-drying, and solvent exchange drying.

[0003] Existing technologies have the following shortcomings: Freeze-drying is a drying method that directly converts a substance from a solid state to a gaseous state. Common freeze-drying technologies include liquid nitrogen drying. However, during the freeze-drying of aerogel materials using liquid nitrogen, due to the extremely low temperature of liquid nitrogen, the solvent inside the aerogel will rapidly sublimate the moment it is immersed in the liquid nitrogen pool. At the same time, ice crystals will rapidly grow in the pores of the aerogel. The pore structure of the aerogel may be damaged due to the rapid growth of ice crystals and the rapid sublimation of solvent, leading to pore collapse or alteration. This will damage the microstructure of the aerogel and greatly affect the quality of the dried aerogel material.

[0004] Therefore, it is necessary to invent an aerogel processing and drying device. Utility Model Content

[0005] To achieve the above objectives, this utility model provides the following technical solution: an aerogel processing and drying device, comprising a liquid nitrogen pool, an inlet at one end of the liquid nitrogen pool, an outlet at the other end of the liquid nitrogen pool, a plurality of electric heating plates fixedly installed on both sides of the outer wall of the liquid nitrogen pool, the number of electric heating plates on the outer wall of the liquid nitrogen pool increasing from the inlet end to the outlet end of the liquid nitrogen pool, a bottom frame slidably installed on the bottom surface of the liquid nitrogen pool, hydraulic rods fixedly installed at the four corners of the top surface of the bottom frame, a drying partition plate installed on the outer wall of the hydraulic cylinder of the hydraulic rod, and a propulsion device installed in the middle of the top surface of the liquid nitrogen pool, the propulsion device being used to drive the drying partition plate submerged in the liquid nitrogen pool to slide within the liquid nitrogen pool.

[0006] Preferably, the propulsion device includes a central suspended plate, which is located at the center of the top surface of the liquid nitrogen tank. Multiple side support plates are fixedly installed on both sides of the central suspended plate, and the side support plates extend to the side of the liquid nitrogen tank and are fixedly connected to the liquid nitrogen tank.

[0007] Preferably, two rows of motors are fixedly installed on the bottom surface of the central hanging plate, and toothed rollers are fixedly installed on the output ends of the two rows of motors that are far apart from each other.

[0008] Preferably, the four corners of the top surface of the bottom frame are fixedly connected to the protruding ends of the hydraulic rod, the drying partition is fixedly installed on the outer wall of the hydraulic cylinder body of the hydraulic rod near the protruding end, and a top plate is fixedly installed on the end of the hydraulic cylinder body of the hydraulic rod away from the drying partition.

[0009] Preferably, the top plate has a slot in the middle, and toothed plates are fixedly installed on both sides of the slot in the middle of the top plate, and the toothed plates can mesh with the toothed roller.

[0010] Preferably, the drying partition has notches on both sides near and away from the toothed roller, and the motors and toothed rollers at both ends of the central hanging plate can be inserted into the notches of the drying partition.

[0011] The beneficial effects of this invention are as follows: Liquid nitrogen is introduced into the liquid nitrogen pool through the inlet, and then the electric heating plate is activated to heat the liquid nitrogen in the pool, causing the temperature of the liquid nitrogen in the pool to gradually change. The aerogel to be dried is placed on the top surface of the drying partition. Then, the hydraulic rod is activated to retract, causing the drying partition and aerogel to sink from the end of the liquid nitrogen pool with a higher temperature. Finally, the drying partition and aerogel that have sunk into the liquid nitrogen pool are slowly moved to the end of the liquid nitrogen pool with a lower temperature by the propulsion device, so as to achieve the effect of gradually cooling and drying the aerogel. This avoids the aerogel from being too cold at the moment of immersion in the liquid nitrogen pool, which would cause the solvent in the aerogel to sublimate rapidly. This slows down the growth of ice crystals and the rate of solvent sublimation in the pores of the aerogel, protects the pore structure, and greatly improves the quality of the dried aerogel material. Attached Figure Description

[0012] Figure 1 A front view of an aerogel processing and drying apparatus provided by this utility model;

[0013] Figure 2 Exploded view of the liquid outlet end of an aerogel processing and drying device provided by this utility model;

[0014] Figure 3 An exploded side view of the liquid nitrogen tank in an aerogel processing and drying apparatus provided by this utility model;

[0015] Figure 4 A cross-sectional view of the liquid nitrogen tank in an aerogel processing and drying apparatus provided by this utility model.

[0016] In the diagram: liquid nitrogen tank 11, inlet 12, outlet 13, central hanging plate 14, side support plate 15, motor 16, toothed roller 17, heating plate 18, bottom frame 21, hydraulic rod 22, drying partition 23, top plate 24, toothed plate 25. Detailed Implementation

[0017] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0018] Example 1

[0019] like Figure 1 - Figure 4 As shown, an aerogel processing and drying apparatus according to a first aspect embodiment of the present invention includes a liquid nitrogen pool 11. One end of the liquid nitrogen pool 11 is provided with an inlet 12, and the other end of the liquid nitrogen pool 11 is provided with an outlet 13. Several electric heating plates 18 are fixedly installed on both sides of the outer wall of the liquid nitrogen pool 11. The number of electric heating plates 18 installed on the outer wall of the liquid nitrogen pool 11 increases from the liquid nitrogen pool 11 inlet 12 to the liquid nitrogen pool 11 outlet 13. A bottom frame 21 is slidably installed on the bottom surface of the liquid nitrogen pool 11. Hydraulic rods 22 are fixedly installed at the four corners of the top surface of the bottom frame 21. A drying partition 23 is installed on the outer wall of the hydraulic cylinder of the hydraulic rod 22. A propulsion device is installed in the middle of the top surface of the liquid nitrogen pool 11. The propulsion device is used to drive the drying partition 23 submerged in the liquid nitrogen pool 11 to slide within the liquid nitrogen pool 11.

[0020] In the above embodiments, it should be noted that the distances between the heating plates 18 on the outer wall of the liquid nitrogen pool 11 are different, with the distance between the heating plates 18 closer to the liquid outlet 13 being smaller. The heating temperatures of the heating plates 18 on the outer wall of the liquid nitrogen pool 11 are also different, with the heating temperature of the heating plates 18 closer to the liquid outlet 13 being higher. Liquid nitrogen is introduced into the liquid nitrogen pool 11 through the liquid inlet 12, and then the heating plates 18 are activated to heat the liquid nitrogen in the liquid nitrogen pool 11, causing the temperature of the liquid nitrogen in the liquid nitrogen pool 11 to gradually change. The aerogel to be dried is then placed on top of the drying partition 23. Next, the hydraulic rod 22 is activated to retract, causing the drying partition 23 and aerogel to sink from the higher temperature end of the liquid nitrogen pool 11. Finally, the propulsion device drives the drying partition 23 and aerogel, which have sunk into the liquid nitrogen pool, to slowly move to the lower temperature end of the liquid nitrogen pool 11. This achieves the effect of gradually cooling and drying the aerogel, avoiding the rapid sublimation of the solvent inside the aerogel due to the excessively low temperature at the moment of immersion in the liquid nitrogen pool. This alleviates the growth of ice crystals and the rate of solvent sublimation in the pores of the aerogel, protects the pore structure, and greatly improves the quality of the dried aerogel material.

[0021] Example 2

[0022] like Figure 1 - Figure 4As shown, an aerogel processing and drying apparatus includes all the contents of Example 1. In addition, the propulsion device includes a central hanging plate 14, which is located at the center of the top surface of the liquid nitrogen pool 11. Multiple side support plates 15 are fixedly installed on both sides of the central hanging plate 14. The side support plates 15 extend to the side of the liquid nitrogen pool 11 and are fixedly connected to the liquid nitrogen pool 11. Two rows of motors 16 are fixedly installed on the bottom surface of the central hanging plate 14. Toothed rollers 17 are fixedly installed at the output ends of the two rows of motors 16 that are far apart from each other.

[0023] In the above embodiment, it should be noted that the side support plate 15 fixes the central hanging plate 14, the motor 16 and the toothed roller 17 above the opening on the top surface of the liquid nitrogen pool 11, so that the toothed roller 17 can be driven to rotate continuously by starting the liquid nitrogen pool 11.

[0024] Example 3

[0025] like Figure 1 - Figure 4 As shown, an aerogel processing and drying apparatus includes all the contents of Example 1. In addition, the four corners of the top surface of the bottom frame 21 are fixedly connected to the extended ends of the hydraulic rod 22. The drying partition 23 is fixedly installed on the outer wall of the hydraulic cylinder body of the hydraulic rod 22 near the extended end. A top plate 24 is fixedly installed on the end of the hydraulic cylinder body of the hydraulic rod 22 away from the drying partition 23. A slot is provided in the middle of the top plate 24. Toothed plates 25 are fixedly installed on both sides of the slot in the middle of the top plate 24. The toothed plates 25 can mesh with the toothed roller 17.

[0026] In the above embodiment, it should be noted that in the initial state, the drying partition 23 is located above the end of the liquid nitrogen pool 11 near the outlet 13. The aerogel to be dried is placed on the top surface of the drying partition 23. By starting the hydraulic rod 22 to retract, the drying partition 23 is driven to sink, and at the same time, the top plate 24 is driven to move downward, so that the toothed plate 25 is engaged with the toothed roller 17. At this time, the motor 16 is started to drive the toothed roller 17 to rotate, so as to achieve the effect of driving the drying partition 23 to slide along the inner wall of the liquid nitrogen pool 11.

[0027] Example 4

[0028] like Figure 1 - Figure 4 As shown, an aerogel processing and drying apparatus includes all the contents of Example 1. In addition, the drying partition 23 has notches on both sides near the toothed roller 17 and away from the toothed roller 17, and the motors 16 and toothed rollers 17 at both ends of the central hanging plate 14 can be inserted into the notches of the drying partition 23.

[0029] In the above embodiments, it should be noted that the distance between the two ends of the central hanging plate 14 and the inner wall of the liquid nitrogen pool 11 is equal to the width of the drying partition 23 after removing the notch. When the drying partition 23 sinks, the motor 16 and the toothed roller 17 can pass through the notch of the drying partition 23.

[0030] The usage process of this utility model is as follows: Those skilled in the art introduce liquid nitrogen into the liquid nitrogen pool 11 through the liquid inlet 12, then start the electric heating plate 18 to heat the liquid nitrogen in the liquid nitrogen pool 11, so that the temperature of the liquid nitrogen in the liquid nitrogen pool 11 gradually changes. Place the aerogel to be dried on the top surface of the drying partition 23, start the hydraulic rod 22 to retract, drive the drying partition 23 to sink, and at the same time drive the top plate 24 to move downward, so that the toothed plate 25 meshes with the toothed roller 17. Then start the motor 16 to drive the toothed roller 17 to rotate, drive the drying partition 23 and aerogel that have sunk into the liquid nitrogen pool to slowly move to the end of the liquid nitrogen pool 11 with a lower temperature, so as to achieve the effect of gradually cooling and drying the aerogel.

[0031] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.

Claims

1. An aerogel processing and drying device, comprising a liquid nitrogen pool (11), one end of which is provided with a liquid inlet (12), and the other end of which is provided with a liquid outlet (13), characterized in that: The outer wall of the liquid nitrogen pool (11) is fixedly provided with a plurality of electric heating plates (18), the number of the electric heating plates (18) provided on the outer wall of the liquid nitrogen pool (11) increases from the liquid inlet (12) end of the liquid nitrogen pool (11) to the liquid outlet (13) end of the liquid nitrogen pool (11), the bottom surface of the liquid nitrogen pool (11) is slidably provided with a bottom frame (21), the top surface of the bottom frame (21) is fixedly provided with a hydraulic rod (22), the outer wall of the hydraulic cylinder body of the hydraulic rod (22) is provided with a drying partition plate (23), the top surface of the liquid nitrogen pool (11) is provided with a propulsion device, and the propulsion device is used to drive the drying partition plate (23) submerged in the liquid nitrogen pool (11) to slide in the liquid nitrogen pool (11).

2. An aerogel processing and drying apparatus according to claim 1, wherein: The propulsion device comprises a central hanging plate (14), the central hanging plate (14) is arranged at the center of the top surface of the liquid nitrogen pool (11), and a plurality of side support plates (15) are fixedly arranged on both sides of the central hanging plate (14), the side support plates (15) extend to the side surface of the liquid nitrogen pool (11) and are fixedly connected with the liquid nitrogen pool (11).

3. An aerogel processing and drying apparatus according to claim 2, wherein: The bottom surface of the central hanging plate (14) is fixedly provided with two rows of motors (16), and the output ends of the two rows of motors (16) away from each other are fixedly provided with gear rollers (17).

4. An aerogel processing and drying apparatus according to claim 3, wherein: The top surface of the bottom frame (21) is fixedly connected with the extension end of the hydraulic rod (22), the drying partition plate (23) is fixedly arranged on the outer wall of the hydraulic cylinder body of the hydraulic rod (22) close to the extension end, and the top plate (24) is fixedly arranged on the end of the hydraulic cylinder body of the hydraulic rod (22) away from the drying partition plate (23).

5. An aerogel processing and drying apparatus according to claim 4, wherein: The middle part of the top plate (24) is provided with a slot, and the two sides of the slot are fixedly provided with tooth plates (25), and the tooth plates (25) can be engaged with the gear rollers (17).

6. An aerogel processing and drying apparatus according to claim 5, wherein: The two sides of the drying partition plate (23) close to and away from the gear rollers (17) are provided with notches, and the motors (16) and the gear rollers (17) at both ends of the central hanging plate (14) can be inserted into the notches of the drying partition plate (23).

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