Sealing device

Abstract

The utility model discloses a sealing device, and relates to the technical field of aerogel production, the sealing device is used in an aerogel felt pad preparation system, the sealing device comprises a bent tubular structure, an inner cavity of the bent tubular structure can be used for a conveying device to penetrate through, and sealing liquid is contained in the bent tubular structure. The sealing devices are arranged on the feeding side of the replacement device, between the discharging side of the replacement device and the feeding side of the modification drying device and on the discharging side of the modification drying device, so that volatilization and overflow of replacement liquid and modification liquid can be effectively prevented, production safety is guaranteed, and normal operation of other devices cannot be affected.

Description

Technical Field

[0001] The utility model relates to the technical field of aerogel material preparation, in particular to a sealing device. Background Art

[0002] Aerogel is a solid material with a nanoporous structure. It boasts excellent properties such as low density, low thermal conductivity, and high specific surface area, and is widely used in thermal insulation, adsorption, catalysis, energy storage, and other fields. Aerogel felt, a key application of aerogel, is particularly suitable for industrial production and application due to its flexibility, high mechanical strength, and ease of processing.

[0003] Traditional aerogel mat production processes typically use a batch production method, which has many drawbacks, such as long production cycles, complex processes, and low production efficiency, making it difficult to meet the needs of large-scale production. In addition, traditional processes often use halogen-containing chemical reagents, which not only increases production costs but also pollutes the environment. Currently, the market demand for aerogel mats is constantly growing, and there is an urgent need for an efficient, environmentally friendly, and automated continuous production equipment and method to improve production efficiency, reduce production costs, and minimize negative impacts on the environment.

[0004] Continuous aerogel mat modification equipment has also emerged, enabling chlorine-free and alcohol-free aerogel modification and drying. However, this equipment lacks a suitable sealing structure, which can easily lead to the volatilization and overflow of activators and modifiers, increasing production risks and affecting the operation of modules in different areas. Utility Model Content

[0005] The main purpose of the utility model is to provide a sealing device, aiming to solve the problem of volatilization and overflow of activating agent and modifier in the existing aerogel preparation equipment.

[0006] To achieve the above-mentioned purpose, the utility model proposes a sealing device, which is used in an aerogel felt preparation system. The sealing device includes a bent tubular structure, the inner cavity of the bent tubular structure can be passed through by a conveying device, and the bent tubular structure is filled with a sealing liquid.

[0007] In one embodiment, the bent tubular structure includes a first sealing tube inclined downward, and a second sealing tube connected to the first sealing tube and inclined upward.

[0008] In one embodiment, the cross-section of the first sealing tube has the same size from one end to the other end of the first sealing tube; and / or,

[0009] The cross-section of the second sealing tube has the same size from one end to the other end.

[0010] In one embodiment, an included angle formed between the first sealing tube and the second sealing tube is 40-75°.

[0011] In one embodiment, the height difference between the highest point and the lowest point of the first sealed tube is 1 to 3.5 m; and / or,

[0012] The height difference between the highest point and the lowest point of the second sealed tube is 1 to 3.5 meters.

[0013] In one embodiment, the first sealing tube is an integrally formed structure; and / or,

[0014] The second sealing tube is an integrally formed structure.

[0015] In one embodiment, the cross section of the first sealing tube is circular or square; and / or,

[0016] The cross section of the second sealing tube is circular or square.

[0017] In one embodiment, the sealing device further comprises a feeding section and a discharging section, wherein the feeding section is arranged at one end of the bent tubular structure, and the discharging section is arranged at the other end of the bent tubular structure.

[0018] In one embodiment, the feed section is arranged horizontally; and / or,

[0019] The discharging section is arranged horizontally.

[0020] In one embodiment, the sealing liquid contained in the bent tubular structure provided on the feed side of the displacement device is one of water, sodium sulfate solution, or acid solution;

[0021] The sealing liquid contained in the bent tubular structure arranged on the discharge side of the modified drying device is water or sodium sulfate solution;

[0022] The sealing liquid contained in the bent tubular structure arranged between the replacement device and the modification and drying device is the same as the replacement liquid in the replacement device.

[0023] The technical solution of the present invention is to provide sealing devices on the feed side of the displacement device, between the discharge side of the displacement device and the feed side of the modification drying device, and on the discharge side of the modification drying device. A conveying device drives the gel composite material through the first sealing device and into the displacement device. The displacement fluid, namely the phase transfer agent and catalyst, contained in the displacement device can enter the gel composite material, so that the gel composite material is loaded with the phase transfer agent and catalyst, which can accelerate the modification speed of the subsequent modification stage and improve the modification effect of the latter stage. The conveying device drives the gel composite material after the displacement treatment through the second sealing device and into the modification drying device. After the displacement treatment, the gel composite material is modified and dried to produce a crude aerogel felt mat. The conveying device drives the crude aerogel felt mat through the third sealing device and into the product post-processing device. The present invention provides sealing devices on the feed side of the displacement device, between the discharge side of the displacement device and the feed side of the modification drying device, and on the discharge side of the modification drying device. These sealing devices can effectively prevent the volatilization and dispersion of the displacement fluid and the modification fluid, ensure production safety, and will not affect the normal operation of other devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0025] Figure 1 This is a structural schematic diagram of an embodiment of an aerogel felt preparation system provided by the present invention;

[0026] Figure 2 for Figure 1 Schematic diagram of the structure of the aging device;

[0027] Figure 3 for Figure 1 Schematic diagram of the structure of the sealing device;

[0028] Figure 4 for Figure 1 Schematic diagram of the structure of the displacement device;

[0029] Figure 5 for Figure 1 Schematic diagram of the structure of the modification device;

[0030] Figure 6 for Figure 5 Schematic diagram of the top view of the mid-flange ultrasonic modified accelerator;

[0031] Figure 7 for Figure 5 Side view of the structure of the mid-flange ultrasonic modified accelerator;

[0032] Figure 8 for Figure 1 Schematic diagram of the structure of the drying device.

[0033] Description of Figure Numbers:

[0034] 100. Aerogel felt preparation system; 1. Raw material device; 1A. Sol module; 2. Gel aging device; 2A. Gel device; 2B. Aging device; 2B1. First shell; 2B2. Non-contact aging accelerator; 3. Sealing device; 3A. First sealing tube; 3B. Second sealing tube; 3C. Sealing liquid; 3D. Feed section; 3E. Discharge section; 4. Displacement device; 4A. Second shell; 4B. Flange-type ultrasonic displacement accelerator; 4C. Displacement liquid replenishing device; 5. Modification and drying device; 5A, modification device; 5A1, third shell; 5A2, flange-type ultrasonic modification accelerator; 5A3, modifier replenishing device; 5B, drying device; 5B1, fourth shell; 5B2, exhaust drying device; 5B3, hot air conveying pipeline; 5B4, air outlet; 6, product post-processing device; 6A, fine processing module; 6B, packaging module; 7, waste treatment device; 8, recovery device; 9, heating system; 10, air supply system; 11, conveying device.

[0035] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] The traditional aerogel felt preparation process usually adopts an intermittent production method, which has many disadvantages, such as long production cycle, complex process, low production efficiency, etc., which makes it difficult to meet the needs of large-scale production. In addition, halogen-containing chemical reagents are often used in traditional processes, which not only increases production costs but also pollutes the environment. At present, the market demand for aerogel felt is growing, and there is an urgent need for an efficient, environmentally friendly, automated continuous preparation equipment and method to improve production efficiency, reduce production costs, and reduce negative impacts on the environment. Continuous modification equipment for aerogel felt has also appeared, which can achieve chlorine-free and alcohol-free aerogel modification and drying. However, the equipment does not have a corresponding sealing structure, which can easily lead to the volatilization and overflow of activators and modifiers, which not only increases production risks but also affects the operation of modules in different regions.

[0040] In view of this, the utility model proposes an aerogel felt preparation system, which aims to solve the problem of volatilization and overflow of activators and modifiers in existing aerogel preparation equipment.

[0041] See also Figure 1In one embodiment of the present invention, the aerogel felt preparation system 100 includes: a raw material device 1, a gel aging device 2, a replacement device 4, a modified drying device 5, a sealing device 3 and a conveying device 11, wherein the raw material device 1 is used to generate a sol composite material; the gel aging device 2 is arranged on one side of the raw material device 1, and the gel aging device 2 is used to solidify and age the sol composite material; the replacement device 4 is arranged on one side of the gel aging device 2, and the replacement device 4 is used to load the gel material after the aging treatment with a replacement liquid; the modified drying device 5 is arranged on one side of the replacement device 4, and the modified drying device 5 is used to modify and dry the gel material loaded with the replacement fluid to obtain an aerogel felt pad; there are three sealing devices 3, the first sealing device 3 is arranged on the feed side of the replacement device 4, the second sealing device 3 is arranged between the discharge side of the replacement device 4 and the feed side of the modification and drying device 5, and the third sealing device 3 is arranged on the discharge side of the modification and drying device 5; the conveying device 11 sequentially passes through the gel aging device 2, the first sealing device 3, the replacement device 4, the second sealing device 3, the modification and drying device 5, and the third sealing device 3, and the conveying device 11 is used to transport the material in the previous device to the next device.

[0042] The technical solution of the present invention adopts a raw material and auxiliary material device 1 to realize the storage of raw materials and auxiliary materials, the preparation of sol, and the compounding of sol and substrate. The raw material for preparing aerogel felt is a composite material of sol and substrate. The present invention adopts a raw material and auxiliary material device 1 to realize the preparation of raw materials for preparing aerogel felt, and can prepare sol composite material. Specifically, the raw material and auxiliary material device 1 includes a sol module 1A, and the preparation of sol composite material is completed in the sol module 1A; the pump pumps the sol composite material into the gel aging device 2, and the gel aging device 2 can solidify and age the sol composite material to prepare a gel composite material; the conveying device 11 drives the gel composite material through The gel composite material passes through the first sealing device 3 and enters the replacement device 4. The replacement fluid, i.e., the phase transfer agent and catalyst, contained in the replacement device 4 can enter the gel composite material, so that the gel composite material is loaded with the phase transfer agent and catalyst, which can accelerate the modification speed and improve the modification effect of the subsequent modification stage; the conveying device 11 drives the gel composite material after the replacement treatment through the second sealing device 3 and enters the modification drying device 5. After the replacement treatment, the gel composite material is modified and dried to obtain a crude aerogel felt mat; the conveying device 11 drives the crude aerogel felt mat through the third sealing device 3 and enters the product post-processing device. The present invention is provided with sealing devices 3 on the feed side of the replacement device 4, between the discharge side of the replacement device 4 and the feed side of the modification drying device 5, and on the discharge side of the modification drying device 5. These sealing devices can effectively prevent the volatilization and overflow of the replacement fluid and the modification fluid, ensure production safety, and will not affect the normal operation of other devices. Specifically, the conveying device 11 can be a conveyor belt.

[0043] In order to better meet the requirements of continuous production, the aerogel felt preparation system of the present invention also includes a product post-processing device 6, a waste treatment device 7, a recovery device 8, a heating system 9, and an air supply system 10. The product post-processing device 6 includes a fine processing module 6A and a packaging module 6B. The conveying device 11 conveys the crude aerogel felt to the fine processing module 6A to perform molding, pressing and other treatments on the crude aerogel felt to obtain an aerogel felt. The conveying device 11 conveys the aerogel felt to the packaging module 6B to package the finally obtained aerogel felt. The waste treatment device 7 is used to treat the three wastes generated by the entire production section; the recovery device 8 is used to collect the materials generated by the entire production section for reuse, thereby improving resource utilization; the heating system 9 supplies heat to the devices that require a heat source to work through a pipeline, and the air supply system 10 supplies air to the devices that require an air source to work through a pipeline. The above devices and systems are all existing technologies and will not be described in detail here.

[0044] In order to better perform solidification and aging treatments on the sol composite material, the gel aging device 2 of the present invention includes a connected gel device 2A and an aging device 2B, wherein the gel device 2A is provided with a curing accelerator, and the aging device 2B is provided with a non-contact aging accelerator. It should be noted that the connected gel device 2A and aging device 2B refer to the gel device 2A and the aging device 2B being connected so that the conveying device 11 conveys the material from the gel device 2A to the aging device 2B. In the gel device 2A, the sol composite material is cured to form a non-flowable gel-like composite material, and the gel-like composite material is then aged to form a stable gel composite material. The structure of the gel device 2A is the same as that of the aging device 2B. For the convenience of description, the structure of the aging device 2B is explained here, refer to Figure 2 The aging device 2B includes a first housing 2B1 and a non-contact aging accelerator 2B2. A feed port is provided at the top of the first housing. The sol composite material in the sol module 1A is pumped to the feed port and then falls into the inner cavity of the first housing. The inner cavity of the first housing forms a working space for the aging treatment. The conveying device 11 extends through the working space for the aging treatment. The non-contact aging accelerator is provided on the outer wall of the first housing. The non-contact aging accelerator can be one or more of microwave, infrared, and radio frequency radiation. It is understood that the curing accelerator can be one or more of microwave, infrared, and radio frequency radiation.

[0045] In order to prevent the replacement fluid in the replacement device 4 from volatilizing or overflowing, which would affect production safety and the normal operation of other devices, a first sealing device 3 is provided between the discharge side of the aging device 2B and the feed side of the replacement device 4. The conveying device 11 can pass the material in the aging device 2B through the sealing device 3 and convey it to the replacement device 4. The three sealing devices have the same structure, except that the sealing fluid contained in each sealing device varies according to the sealing requirements. The structure of the sealing device is described using the first sealing device as an example. Figure 3 The sealing device 3 comprises a bent tubular structure, the inner lumen of which is adapted for passage of the delivery device 11. The bent tubular structure contains a sealing liquid 3C. The sealing liquid contained in the first sealing device is water, sodium sulfate solution, or an acid solution; the sealing liquid contained in the second sealing device is the same as the replacement liquid in the replacement device; and the sealing liquid contained in the third sealing device is water or sodium sulfate solution.

[0046] The technical solution of the present invention can better contain the sealing liquid by adopting a bent tubular structure, and helps to optimize the space of the structure, making the structure of the entire system more compact. It is understandable that the discharge end of the bent tubular structure is located above the liquid level of the displacement fluid in the displacement device 4.

[0047] Specifically, the bent tubular structure includes a first sealed tube 3A that tilts downward, and a second sealed tube 3B that is connected to the first sealed tube 3A and tilts upward. It should be noted that the terms "downward tilt" or "upward tilt" refer to the height of the discharge end relative to the feed end. For example, the discharge end of the first sealed tube 3A is lower than the feed end, so the first sealed tube 3A tilts downward. Similarly, the second sealed tube 3B tilts upward. The first sealed tube 3A and the second sealed tube 3B of the present invention form a "V"-shaped structure, which can stably contain the sealing liquid 3C and is more compact, facilitating space optimization.

[0048] To facilitate smoother passage of the conveying device 11 through the first sealing device 3, the cross-sectional dimensions of the first sealing tube 3A are uniform along the conveying direction of the conveying device 11; and / or the cross-sectional dimensions of the second sealing tube 3B are uniform along the conveying direction of the conveying device 11. Preferably, the cross-sectional dimensions of the first sealing tube 3A and the cross-sectional dimensions of the second sealing tube 3B are uniform along the conveying direction of the conveying device 11.

[0049] To ensure that the first sealing device 3 can effectively contain the sealing liquid 3C and maintain a compact structure, the angle α formed between the first sealing tube 3A and the second sealing tube 3B is between 40 and 75 degrees. If the angle between the first sealing tube 3A and the second sealing tube 3B is too large, the sealing liquid 3C cannot be contained effectively, especially during operation, where high temperatures and other conditions can easily affect the height of the sealing liquid 3C. If the angle between the first sealing tube 3A and the second sealing tube 3B is too small, more space is occupied, which is not conducive to space optimization.

[0050] To ensure that the liquid level of the sealing liquid 3C in the first sealing device 3 always remains within the sealed tube, the height difference H between the highest and lowest points of the first sealed tube 3A is 1 to 3.5 meters; and / or the height difference between the highest and lowest points of the second sealed tube 3B is 1 to 3.5 meters. Preferably, the height difference between the highest and lowest points of the first sealed tube 3A is 2 meters, and the height difference between the highest and lowest points of the second sealed tube 3B is 2 meters. The highest points of the first sealed tube 3A and the second sealed tube 3B are at the same level, that is, the line connecting the highest points of the first sealed tube 3A and the second sealed tube 3B is parallel to the horizontal plane.

[0051] To ensure the strength of the first sealed tube 3A, the first sealed tube 3A is an integrally formed structure; and / or the second sealed tube 3B is an integrally formed structure. Preferably, the first sealed tube 3A is an integrally formed structure, and the second sealed tube 3B is an integrally formed structure. Further preferably, the first sealed tube 3A and the second sealed tube 3B are an integrally formed structure.

[0052] In order to facilitate the conveyor belt to carry materials through the first sealed tube 3A, the cross section of the first sealed tube 3A is circular or square; and / or the cross section of the second sealed tube 3B is circular or square.

[0053] To facilitate installation of the first sealing device 3 and smooth entry and exit of the conveying device 11 into and out of the first sealing device 3, the first sealing device 3 further includes a feed section 3D and a discharge section 3E. The feed section 3D is disposed at one end of the bent tubular structure, and the discharge section 3E is disposed at the other end of the bent tubular structure. It is understood that the feed section 3D is disposed at the feed end of the first sealed tube 3A and is in communication with the first sealed tube 3A, while the discharge section 3E is disposed at the discharge end of the second sealed tube 3B and is in communication with the second sealed tube 3B. The feed section 3D is in communication with the discharge end of the aging device 2B, and the discharge section 3E is in communication with the feed end of the replacement device 4.

[0054] To facilitate the installation of the first sealing device 3 and the stable entry and exit of the conveying device 11 into and out of the first sealing device 3, the feed section 3D is horizontally arranged; and / or the discharge section 3E is horizontally arranged. Preferably, the feed section 3D and the discharge section 3E have the same structure and are both horizontally arranged.

[0055] The conveying device 11 drives the gel composite material through the first sealing device 3 and enters the replacement device 4. Figure 4 The displacement device 4 includes a second shell 4A, a flange-type ultrasonic displacement accelerator 4B, and a displacement fluid replenishing device 4C. The inner cavity of the second shell 4A forms a displacement treatment working space. The displacement treatment working space is filled with displacement fluid, which includes a phase transfer agent and a catalyst. The conveying device 11 passes through the lower part of the working space, the flange-type ultrasonic displacement accelerator 4B is arranged at the upper part of the working space, and the displacement fluid replenishing device 4C is arranged on the top of the second shell 4A. The displacement fluid replenishing device 4C is used to replenish the displacement fluid into the displacement treatment working space according to production needs.

[0056] The technical solution of the present invention allows the gel composite to fully contact the replacement fluid in the replacement device 4, so that the replacement fluid can enter the gel composite more fully. The phase transfer agent helps the modifier to enter the gel composite faster and more evenly. The catalyst helps to increase the subsequent modification speed, thereby helping to accelerate the modification speed and modification effect in the subsequent modification stage, accelerate the discharge speed of the aqueous solution in the latter stage, and prevent the influence of residual acid on product performance. The phase transfer agent is selected from at least one of methanol, ethanol, n-propanol, isopropanol, tert-butanol, isobutanol, n-butanol, 1,3-butanediol, 1,4-butanediol, 2,3-butanediol, polyethylene glycol, polypropylene glycol, polyethylene glycol-propylene glycol block copolymer, diethylene glycol monomethyl ether, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, triethylene glycol monobutyl ether, tetraethylene glycol monomethyl ether, tetraethylene glycol monobutyl ether, acetone, 1,4-dioxane, 1,4-dioxane, 2-butanone, and the catalyst is selected from at least one of sulfuric acid, nitric acid, phosphoric acid, formic acid, acetic acid, propionic acid, methanesulfonic acid, p-toluenesulfonic acid, benzoic acid, oxalic acid, citric acid, terephthalic acid, and isophthalic acid.

[0057] The conveying device 11 drives the gel composite material after the replacement treatment through the second sealing device 3 and enters the modification and drying device 5. After the replacement treatment, the gel composite material is modified and dried to obtain a crude aerogel felt mat. The structure of the second sealing device 3 is the same as that of the first sealing device 3. The modification and drying device 5 includes a modification device 5A and a drying device 5B that are connected. The modification device 5A and the drying device 5B are connected to each other so that the conveying device 11 can transport the processed material in the modification device 5A to the drying device 5B. Figure 5 The modification device 5A includes a third shell 5A1, a flange-type ultrasonic modification accelerator 5A2, and a modifier replenishing device 5A3. The inner cavity of the third shell 5A1 forms a modification workspace. The conveying device 11 passes through the lower part of the modification workspace. The flange-type ultrasonic modification accelerator 5A2 is arranged at the upper part of the modification workspace. The modifier replenishing device 5A3 is arranged at the upper part of the third shell 5A1. The modifier replenishing device 5A3 is used to replenish the modifier into the modification workspace according to production needs. For a structural diagram of the flange-type ultrasonic modification accelerator 5A2, please refer to Figure 6 and Figure 7 The flange-type ultrasonic modification accelerator 5A2 is fixed via a flange to the modification workspace within the third housing 5A1. The ultrasonic waves it generates help accelerate the modification process and improve the modification effect. The modifier is selected from at least one of hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, dodecamethylpentasiloxane, hexamethyldisilazane, cyclohexamethyltrisiloxane, cyclooctamethyltetrasiloxane, and cyclodecamethylpentasiloxane.

[0058] The conveying device 11 conveys the modified gel composite material to the drying device 5B. Figure 8 The drying device 5B includes a fourth shell 5B1, an exhaust drying device 5B2, and a hot air conveying pipe 5B3. The inner cavity of the fourth shell 5B1 constitutes a working space for drying. The conveying device 11 runs through the middle of the working space for drying. There are two hot air conveying pipes 5B3, one of which is arranged at the upper part of the working space for drying, and the other is arranged at the lower part of the working space for drying. That is, the two hot air conveying pipes 5B3 are distributed on the upper and lower sides of the conveying device 11. The hot air conveying pipe 5B3 is provided with an air outlet 5B4 facing the conveying device 11. The hot air in the hot air conveying pipe 5B3 flows out through the air outlet 5B4 to dry the gel composite material. The exhaust drying device 5B2 is arranged at the top of the fourth shell 5B1 to promptly discharge moisture generated during the drying process, thereby ensuring the drying effect.

[0059] The method for preparing an aerogel felt using the aerogel felt preparation system comprises the following steps:

[0060] S10, mixing raw materials and auxiliary materials in the raw material and auxiliary material device 1 to prepare a sol composite material;

[0061] S20, pumping the sol composite material obtained in step S10 into the gel aging device 2, curing and aging the sol composite material to obtain a gel composite material;

[0062] S30, the conveying device 11 drives the gel composite material obtained in step S20 through the first sealing device 3 and enters the replacement device 4 containing the replacement fluid, where the gel composite material is fully contacted with the replacement fluid to obtain a gel composite material loaded with the replacement fluid;

[0063] S40 , the conveying device 11 drives the gel composite material loaded with the replacement fluid prepared in step S30 through the second sealing device 3 and enters the modification and drying device 5 , where the gel composite material is modified and dried to prepare an aerogel felt mat.

[0064] In step S20, the temperature of the curing treatment is 0-100°C, the time of the curing treatment is 10s-2h, the temperature of the aging treatment is 0-100°C, and the time of the aging treatment is 1min-48h; preferably, the temperature of the curing treatment is 40-50°C, the time is 40-50min, and the temperature of the aging treatment is 60-70°C, and the time is 4-5h.

[0065] In step S30, the temperature during the replacement treatment is 0-75°C, and the replacement treatment time is 10 minutes to 24 hours; preferably, the temperature during the replacement treatment is 40-50°C, and the replacement treatment time is 3-4 hours.

[0066] In step S40, the temperature during the modification treatment is 0-75°C, the modification treatment time is 1 minute to 5 hours, the temperature during the drying treatment is 0-300°C, and the drying time is 10 seconds to 3 hours; preferably, the temperature during the modification treatment is 50-60°C, the modification treatment time is 2 to 3 hours, the temperature during the drying treatment is 120-160°C, and the drying time is 40 to 50 minutes.

[0067] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A sealing device, characterized in that: The sealing device is used in an aerogel felt preparation system, which includes a replacement device and a modification and drying device. The sealing device includes a bent tubular structure, the inner cavity of the bent tubular structure is passable by a conveying device, and the bent tubular structure contains a sealing liquid. There are three sealing devices, the first sealing device is arranged on the feed side of the replacement device, the second sealing device is arranged between the discharge side of the replacement device and the feed side of the modification and drying device, and the third sealing device is arranged on the discharge side of the modification and drying device.

2. The sealing device according to claim 1, wherein: The bent tubular structure includes a first sealing tube inclined downward, and a second sealing tube connected to the first sealing tube and inclined upward.

3. The sealing device according to claim 2, wherein: The cross-sectional dimensions of the first sealing tube are the same from one end to the other end of the first sealing tube; and / or, The cross-section of the second sealing tube has the same size from one end to the other end.

4. The sealing device according to claim 2, wherein: The included angle formed between the first sealing tube and the second sealing tube is 40-75°.

5. The sealing device according to claim 2, wherein: The height difference between the highest point and the lowest point of the first sealed tube is 1 to 3.5 m; and / or, The height difference between the highest point and the lowest point of the second sealed tube is 1 to 3.5 meters.

6. The sealing device according to claim 2, wherein: The first sealing tube is an integrally formed structure; and / or, The second sealing tube is an integrally formed structure.

7. The sealing device according to claim 2, wherein: The cross section of the first sealing tube is circular or square; and / or, The cross section of the second sealing tube is circular or square.

8. The sealing device according to claim 1, wherein: The sealing device further comprises a feeding section and a discharging section, wherein the feeding section is arranged at one end of the bent tubular structure, and the discharging section is arranged at the other end of the bent tubular structure.

9. The sealing device according to claim 8, wherein: The feeding section is arranged horizontally; and / or, The discharging section is arranged horizontally.

10. The sealing device according to claim 1, wherein: The sealing liquid contained in the bent tubular structure provided on the feed side of the displacement device is one of water, sodium sulfate solution, or acid solution; The sealing liquid contained in the bent tubular structure arranged on the discharge side of the modified drying device is water or sodium sulfate solution; The sealing liquid contained in the bent tubular structure arranged between the replacement device and the modification and drying device is the same as the replacement liquid in the replacement device.

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