A pressure-resistant and waterproof desiccant preparation and molding apparatus and process

Abstract

This invention relates to the field of desiccant technology, and particularly to a pressure-resistant and waterproof desiccant preparation and molding apparatus and process, comprising the following steps: S1 Gel preparation, mixing sodium silicate solution with dilute sulfuric acid, controlling the reaction temperature at 30-50°C, stirring in a reaction vessel to generate silica gel, granulating the gel to obtain wet silica gel particles with a particle size of 1-4 mm; S2 Aging, immersing the wet silica gel particles in an aging tank, adding a dilute acid solution with a pH of 2-4, and aging at a constant temperature of 40-60°C for 2-6 hours to further condense the silicon-oxygen bond network inside the gel and initially establish a skeletal structure; S3 Washing the gel, repeatedly washing the aged silica gel particles with deionized water to remove residual sodium sulfate and other byproducts; S4 Drying and calcining, sending the washed wet silica gel particles into a molding device for calcination using a segmented temperature-controlled process; S5 Sieving and packaging.

Description

Technical Field

[0001] This invention relates to the field of desiccant technology, and in particular to a pressure-resistant and waterproof desiccant preparation and molding apparatus and process. Background Technology

[0002] Silica gel desiccant is widely used because of its stable chemical properties, non-toxicity, odorlessness, low cost, and waterproof function. Its production process mainly includes processes such as gel preparation, aging, washing, drying and calcination, and sieving. Among them, drying and calcination is an indispensable key step in the molding process. Wet silica gel particles must be dried and calcined to remove moisture and form a stable porous skeleton. Undried wet gel has no practical value. Silica gel particles processed by ordinary methods have low strength and are easily broken and pulverized during transportation and use. The leakage of powder can contaminate the protected items, which is particularly fatal in the fields of electronics, food, and pharmaceuticals. To address this, surface coating methods or secondary granulation with the addition of binders are used to enhance the strength of silica gel desiccants. However, these processes are complex, have high production costs, and may also affect the chemical stability of the desiccant. Summary of the Invention

[0003] Therefore, in view of the above problems, the present invention proposes a pressure-resistant and waterproof desiccant preparation and molding device and process.

[0004] To achieve the above objectives, the technical solution of the present invention provides a pressure-resistant and waterproof desiccant preparation and molding device, comprising: a furnace body, a heating channel disposed on the furnace body, a plurality of heating units disposed within the heating channel, a base frame disposed within the furnace body via a driving device, a first mesh belt conveyor disposed on the base frame, and a second mesh belt conveyor disposed on the base frame and connected to the first mesh belt conveyor. The height of the first mesh belt conveyor is higher than that of the second mesh belt conveyor. A guide plate is also provided between the first mesh belt conveyor and the second mesh belt conveyor. Baffles are also provided on both sides of the first mesh belt conveyor and the second mesh belt conveyor on the base frame. A first heat insulation device is also provided on the base frame between the first mesh belt conveyor and the second mesh belt conveyor. A second heat insulation device is also provided at the bottom of the base frame between the first mesh belt conveyor and the second mesh belt conveyor.

[0005] A further improvement is that the first heat insulation device includes: a main partition plate located on the base frame between the first mesh belt conveyor and the second mesh belt conveyor; a through hole on the main partition plate; aluminum silicate fiber blanket layers respectively located on both sides of the main partition plate; and a mirror stainless steel reflector layer located on the aluminum silicate fiber blanket layers, wherein the aluminum silicate fiber blanket layers extend outward to abut against the heating channel.

[0006] A further improvement is that the main partition is also provided with several springs, the other end of which passes through the aluminum silicate fiber blanket layer and is fixedly connected to the mirror stainless steel reflector layer. The back of the mirror stainless steel reflector layer is provided with several turbulence plates.

[0007] A further improvement is that the surface of the contact portion of the aluminum silicate fiber blanket layer is also provided with a binding cloth, which is a high-temperature resistant PTFE fiber cloth or graphite fiber cloth, in order to reduce the sliding friction resistance between the blanket and the inner wall of the heating channel.

[0008] A further improvement is that the drive device includes: several V-shaped tracks extending laterally along the axial direction of the heating channel within the heating channel; V-shaped rollers matching the tracks and located at the bottom of the base frame; a rack at the bottom of the base frame; rotary drive components located at both ends of the furnace body; and gears matching the rack and located on the rotating shaft of the rotary drive components.

[0009] A further improvement is that the heating unit includes: an installation slot located in the heating channel, a far-infrared heating plate located in the installation slot, a circulating fan located inside the furnace with its air outlet at the top of the heating channel, and a return air pipe located inside the furnace with one end connected to the heating channel and the other end connected to the circulating fan. The installation slot is located above and to the side of the first mesh belt conveyor and the second mesh belt conveyor.

[0010] A further improvement is that a reflective base plate is provided on the base frame below the first mesh belt conveyor and the second mesh belt conveyor.

[0011] A further improvement is that a guide groove is provided on the guide plate, and several rows of rake teeth are also provided on the guide groove.

[0012] A manufacturing process for a pressure-resistant and waterproof desiccant includes the following steps: S1 gel preparation involves mixing sodium silicate solution with dilute sulfuric acid, controlling the reaction temperature at 30-50°C, stirring in a reaction vessel to generate silica gel, granulating the gel to obtain wet silica gel particles with a particle size of 1-4 mm. S2 aging involves placing wet silica gel particles into an aging tank, adding a dilute acid solution with a pH of 2-4, and aging at a constant temperature of 40-60°C for 2-6 hours to further condense the silica-oxygen bond network inside the gel and initially establish the skeletal structure. S3 washing agent: repeatedly wash the aged silicone particles with deionized water to remove residual sodium sulfate and other byproducts. S4 Drying and Calcination: The washed wet silica gel particles are fed into the molding device and calcined using a segmented temperature control process. S5 screening and packaging: After drying and calcining, the silica gel granules are graded by particle size using a vibrating screen to remove broken particles. Qualified finished products are then sealed in bags.

[0013] A further improvement is that, in step S4, the segmented temperature control process includes: S41 pre-drying section: heat to 80-100°C and maintain for 30-60 minutes to remove surface free water; In the S42 calcination strengthening section, the temperature is further increased to 200-300°C and maintained for 2-4 hours to promote the aggregation of silica particles and the shrinkage of the skeleton, thereby improving particle strength. The S43 cooling section allows the material to be discharged naturally at a temperature below 60°C.

[0014] The advantages and beneficial effects of this invention are as follows: With its simple structure and convenient use, this product enhances strength without the need for additives. By segmenting the temperature of the pre-drying section and the calcination strengthening section, high-mechanical-strength silica gel desiccant can be produced without introducing surface coatings or binders, simply by controlling the temperature and time of the drying and calcination process. This simplifies the production process, reduces costs, maintains the chemical stability of the silica gel material, and allows for flexible adjustment of the process time. The entire base frame can slide, causing the effective working length of the two mesh belts to change within the heating channel, enabling independent adjustment of the pre-drying and calcination times. This adapts to the process requirements of different product specifications without requiring downtime modifications. Attached Figure Description

[0015] Figure 1 This is a side view schematic diagram of a pressure-resistant and waterproof desiccant preparation and molding device according to the present invention; Figure 2 This is a front cross-sectional schematic diagram of a pressure-resistant and waterproof desiccant preparation and molding device according to the present invention; Figure 3 This is a side view of the first heat insulation device part of the base frame of the pressure-resistant and waterproof desiccant preparation and molding device of the present invention; Figure 4 This is a top view of the base frame of the pressure-resistant and waterproof desiccant preparation and molding device of the present invention without the first heat insulation device installed; Figure 5 This is a schematic diagram of the rake teeth of a pressure-resistant and waterproof desiccant preparation and molding device according to the present invention; Figure 6 This is a bottom view of the furnace interior of the pressure-resistant and waterproof desiccant preparation and molding device of the present invention; In the diagram: 1. Furnace body; 2. Heating channel; 3. Base frame; 4. First mesh belt conveyor; 5. Second mesh belt conveyor; 6. Guide plate; 7. Baffle; 8. Main partition; 9. Through hole; 10. Aluminum silicate fiber blanket layer; 11. Mirror stainless steel reflector layer; 12. Spring; 13. Turbulence plate; 14. Edge binding fabric; 15. V-shaped track; 16. V-shaped roller; 17. Rack; 18. Gear; 19. Reduction gearbox; 20. Servo motor; 21. Mounting slot; 22. Far-infrared heating plate; 23. Circulating fan; 24. Reflector base plate; 25. Guide chute; 26. Rake teeth. Detailed Implementation

[0016] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0017] like Figures 1-6 As shown, a production process for a pressure-resistant and waterproof desiccant includes the following steps: S1 gel preparation involves mixing sodium silicate solution with dilute sulfuric acid, controlling the reaction temperature at 30-50°C, stirring in a reaction vessel to generate silica gel, granulating the gel to obtain wet silica gel particles with a particle size of 1-4 mm. S2 aging involves placing wet silica gel particles into an aging tank, adding a dilute acid solution with a pH of 2-4, and aging at a constant temperature of 40-60°C for 2-6 hours to further condense the silica-oxygen bond network inside the gel and initially establish the skeletal structure. S3 washing agent: repeatedly wash the aged silicone particles with deionized water to remove residual sodium sulfate and other byproducts. S4 Drying and Calcination: The washed wet silica gel particles are fed into the molding device and calcined using a segmented temperature control process. S5 screening and packaging: After drying and calcining, the silica gel granules are graded by particle size using a vibrating screen to remove broken particles. Qualified finished products are then sealed in bags. In the S1 gel preparation stage, the hydrogel generated by the reaction of sodium silicate and sulfuric acid is directly granulated to obtain wet particles within the target particle size range, avoiding debris generation in subsequent crushing processes. In the S2 aging stage, the product is fully aged under acidic, constant-temperature conditions; the condensation of the silicon-oxygen bond network is a crucial foundation for the subsequent skeleton strength. In the S3 gel washing stage, the byproduct sodium sulfate is thoroughly removed to prevent residues from affecting product purity. In the S4 drying and calcination stage, a segmented temperature-controlled calcination process is employed, a core step in achieving pressure resistance and waterproof performance. In the S5 screening and packaging stage, substandard particles are removed to ensure consistent finished product quality.

[0018] Furthermore, as an optional implementation, in step S4, the segmented temperature control process includes: S41 pre-drying section: heat to 80-100°C and maintain for 30-60 minutes to remove surface free water; In the S42 calcination strengthening section, the temperature is further increased to 200-300°C and maintained for 2-4 hours to promote the aggregation of silica particles and the shrinkage of the skeleton, thereby improving particle strength. S43 cooling section, naturally cooled to below 60°C before discharge; The S41 pre-drying section maintains a relatively low temperature range of 80-100℃ for 30-60 minutes, primarily to remove free water from the particle surface. The pre-drying temperature is kept moderate to prevent rapid evaporation of surface moisture, which could form a dense, hard shell that hinders internal moisture escape. The S42 calcination strengthening section raises the temperature to 200-300℃ and holds for 2-4 hours. Within this high-temperature range, silica gel particles aggregate, the silicon-oxygen bond network further condenses, the skeleton shrinks uniformly, and particle strength is significantly improved. The S43 cooling section allows the particles to cool naturally to below 60℃ before discharge, preventing thermal stress cracking caused by rapid cooling. This segmented temperature-controlled process, without introducing any surface coatings or binders, produces silica gel desiccants with high mechanical strength solely through temperature and time control during the drying and calcination stages. This simplifies the production process, reduces costs, and maintains the chemical stability of the silica gel material.

[0019] A pressure-resistant and waterproof desiccant preparation and molding apparatus includes: a furnace body 1, a heating channel 2 disposed on the furnace body 1, a plurality of heating units disposed within the heating channel 2, a base frame 3 slidably disposed within the furnace body 1 via a driving device, a first mesh belt conveyor 4 disposed on the base frame 3, and a second mesh belt conveyor 5 disposed on the base frame 3 and connected to the first mesh belt conveyor 4. The height of the first mesh belt conveyor 4 is higher than that of the second mesh belt conveyor 5. A guide plate 6 is also provided between the first mesh belt conveyor 4 and the second mesh belt conveyor 5. Baffles 7 are also provided on both sides of the first mesh belt conveyor 4 and the second mesh belt conveyor 5 on the base frame 3. A first heat insulation device is also provided on the base frame 3 between the first mesh belt conveyor 4 and the second mesh belt conveyor 5. A second heat insulation device (not shown in the figure) is also provided at the bottom of the base frame 3 between the first mesh belt conveyor 4 and the second mesh belt conveyor 5. To achieve continuous processing of two different temperature stages—pre-drying and calcination—within the same equipment, and to address the material connection issues caused by the difference in residence time between the two stages, a segmented mesh belt layout is adopted. The first mesh belt conveyor 4 and the second mesh belt conveyor 5 are integrated on the same base frame 3. The first mesh belt conveyor 4 corresponds to the lower-temperature pre-drying section, and the second mesh belt conveyor 5 corresponds to the higher-temperature calcination section. A height difference exists between the two mesh belt sections, with the first mesh belt conveyor 4 higher than the second mesh belt conveyor 5. Material slides from the pre-drying section to the calcination section under gravity via the guide plate 6. The base frame 3 can slide axially within the furnace body 1 via a drive device, thereby changing the effective working length of the first and second mesh belt conveyors 4 and 5 within the heating channel 2, enabling independent adjustment of the pre-drying and calcination times. A first heat insulation device is installed between the two mesh belt sections, dividing the heating channel 2 into two independently temperature-controlled areas; baffles 7 are installed on both sides to prevent material from spilling from the sides of the mesh belts.

[0020] Furthermore, as an optional implementation, in order to achieve effective thermal isolation between the pre-drying section and the calcination section, and to accommodate the sliding movement of the base frame 3 relative to the furnace body 1, the first heat insulation device adopts a multi-layer composite structure. The first heat insulation device includes: a main partition plate 8 located on the base frame 3 between the first mesh belt conveyor 4 and the second mesh belt conveyor 5; a through hole 9 on the main partition plate 8; aluminum silicate fiber blanket layers 10 respectively located on both sides of the main partition plate 8; and a mirror stainless steel reflector layer 11 located on the aluminum silicate fiber blanket layers 10. The aluminum silicate fiber blanket layers 10 extend outward and abut against the heating channel 2. The second heat insulation device has the same structure as the first heat insulation device, and will not be described in detail here; The main partition 8 serves as a structural support, with through holes 9 for material and mesh belt passage. The main partition 8 is covered with aluminum silicate fiber blankets 10 on both sides as the main insulation layer. The fiber blankets extend outward to the inner wall of the heating channel 2 and abut against it, which not only provides insulation but also forms a movable sealing interface. A mirror stainless steel reflector layer 11 is then covered on the outside of the fiber blanket layer. Its high reflectivity reflects the heat radiation from the high-temperature section back, reducing the radiative heat load on the fiber blanket. Since the fiber blanket itself is soft and resilient, the extended part can adaptively conform to the inner wall of the heating channel 2 after being compressed, compensating for the displacement changes caused by the movement of the base frame 3.

[0021] Furthermore, as an optional implementation, in order to keep the surface of the mirror stainless steel reflector clean and prevent dust accumulation from causing a decrease in reflection efficiency, an elastic suspension structure and an airflow disturbance structure are provided between the reflector and the main partition 8. The main partition 8 is also provided with several springs 12, the other end of which passes through the aluminum silicate fiber blanket layer 10 and is fixedly connected to the mirror stainless steel reflector layer 11. The back of the mirror stainless steel reflector layer 11 is provided with several turbulence plates 13. Supported by the elastic spring 12, the reflector is in a vibratory state, rather than being rigidly fixed. Several turbulence plates 13 are provided on the back of the reflector. When the airflow from the hot air circulation system passes through the gaps in the first heat insulation device, it flows through the turbulence plates 13, generating irregular turbulence and pressure pulsations. These airflow disturbances act on the reflector, causing it to vibrate continuously under the support of the spring 12. This vibration shakes off dust adhering to the reflector surface, preventing dust accumulation and obstruction of the reflective surface, ensuring the reflector maintains high thermal radiation reflection efficiency over a long period, thereby guaranteeing stable heating and drying efficiency in the calcination section. The elastic connection of the spring 12 also ensures that the reflector will not be damaged when the base frame 3 slides.

[0022] Furthermore, as an optional implementation, in order to protect the movable sealing interface between the aluminum silicate fiber blanket layer 10 and the inner wall of the heating channel 2, the surface of the contact portion of the aluminum silicate fiber blanket layer 10 is also provided with a binding cloth 14, which is a high-temperature resistant PTFE fiber cloth or graphite fiber cloth, so as to reduce the sliding friction resistance between it and the inner wall of the heating channel 2. Although aluminosilicate fiber blankets are soft and heat-resistant, their fiber structure is prone to fuzzing and wear during long-term sliding friction with the furnace wall, leading to a decrease in sealing performance. By covering them with heat-resistant PTFE fiber cloth or graphite fiber cloth, these two materials, with their low coefficient of friction and self-lubricating properties, effectively reduce sliding friction resistance, minimize wear on the fiber blanket during the sliding of the base frame 3, extend the service life of the first insulation device, and maintain a stable sealing effect.

[0023] Furthermore, as an optional implementation, in order to achieve smooth and precise sliding of the base frame 3 within the furnace body 1, the driving device includes: several V-shaped tracks 15 extending laterally along the axial direction of the heating channel 2 within the heating channel 2; V-shaped rollers 16 located at the bottom of the base frame 3 and matching the tracks; a rack 17 located at the bottom of the base frame 3; rotary drive components located at both ends of the furnace body 1; and gears 18 located on the rotating shaft of the rotary drive components and matching the rack 17. The second heat insulation device (not shown in the figure) avoids the rack 17 and the V-shaped track 15; The rotary drive component includes: a reduction gearbox 19 fixedly mounted on the furnace body 1, and a servo motor 20 mounted on the reduction gearbox 19. The gear 18 is mounted on the rotating shaft of the reduction gearbox 19. The V-shaped fit has an automatic centering characteristic, which can effectively prevent the base frame 3 from shifting laterally during movement and ensure the straightness of the motion trajectory. A rack 17 is installed at the bottom of the base frame 3. The rotary drive components at both ends of the furnace body 1 are driven by gears 18 meshing with the rack 17, converting the rotational motion into linear displacement of the base frame 3. The transmission ratio is precise and the driving torque is large. The rotary drive components are located at both ends of the furnace body 1, and can be driven simultaneously at both ends or at one end as needed.

[0024] Furthermore, as an optional implementation, in order to provide a uniform and efficient heating effect, the heating unit includes: an installation groove 21 disposed in the heating channel 2, a far-infrared heating plate 22 disposed in the installation groove 21, a circulating fan 23 disposed in the furnace body 1 with its air outlet located at the top of the heating channel 2, and a return air pipe (not shown in the figure) disposed in the furnace body 1 with one end connected to the heating channel 2 and the other end connected to the circulating fan 23. The installation groove 21 is located above and to the side of the first mesh belt conveyor 4 and the second mesh belt conveyor 5. Far-infrared heating plates 22 are installed in mounting slots 21 above and to the side of heating channels 2, radiating heat to the material from multiple directions. This provides good heating uniformity and strong penetration, effectively promoting the escape of moisture from the silica gel particles. Simultaneously, a circulating fan 23 and a return air duct form a hot air circulation system. The circulating fan 23 draws hot air from the bottom of the furnace body 1 back into the heating channel 2 and sends it back to the top air outlet of the heating channel 2 via the return air duct, forming a closed-loop hot air circulation. This circulation makes the temperature distribution within the heating channel 2 more uniform, avoiding localized overheating or low-temperature dead zones. The combination of radiant heating and hot air convection heating significantly improves drying efficiency.

[0025] Furthermore, as an optional implementation, in order to make full use of the heat generated by the heating unit and reduce the ineffective loss of heat to the bottom of the furnace body 1, a reflective base plate 24 is also provided on the base frame 3 below the first mesh belt conveyor 4 and the second mesh belt conveyor 5. The far-infrared heating plate 22 radiates heat upwards and to the sides, with some heat dissipating downwards through the mesh belt. The reflective base plate 24 reflects this dissipated heat back to the bottom of the material layer, ensuring effective heating on both the top and bottom surfaces of the material, improving thermal efficiency and reducing energy consumption. The reflective base plate 24 can be made of mirror-finished stainless steel, which has high reflectivity, is heat-resistant, and easy to clean.

[0026] Furthermore, as an optional implementation, in order to ensure that the material slides smoothly and evenly from the first mesh belt conveyor 4 to the second mesh belt conveyor 5, the guide plate 6 is provided with a guide groove 25, and the guide groove 25 is also provided with several rows of rake teeth 26. A guide trough 25 is provided on the guide plate 6 to limit the material's sliding path and prevent it from rolling randomly on the plate and causing uneven accumulation. The guide trough 25 is also equipped with several rows of rake teeth 26. As the material slides over the rake teeth 26, it is repeatedly combed and diverted, making the material layer thickness more uniform. After being shaped by the guide trough 25 and the rake teeth 26, the material is spread on the second mesh belt conveyor 5 with a uniform thickness, ensuring uniform heating in the calcination section and consistent product quality. At the same time, the rake teeth 26 can also appropriately slow down the material's sliding speed, reducing impact and breakage when particles fall from a height.

[0027] Working principle: Wet silica gel granules enter the heating channel 2 via the first mesh belt conveyor 4, where they undergo a pre-drying section at 80-100℃ to remove surface free water. After pre-drying, the material slides down the guide plate 6 to the second mesh belt conveyor 5, entering the calcination and strengthening section at 200-300℃. Under high temperature, the internal particles of the silica gel aggregate, the silicon-oxygen bond network condenses, the skeleton shrinks uniformly, and the particle strength is significantly improved. After calcination, the material cools naturally and is discharged.

[0028] When the pre-drying time or calcination time needs to be adjusted, the base frame 3 is axially slid along the heating channel 2 via the drive device. The movement of the base frame 3 causes the first mesh belt conveyor 4 and the second mesh belt conveyor 5 to shift as a whole, changing their effective working lengths within the heating channel 2, thereby independently adjusting the residence time of the material in the pre-drying section and the calcination strengthening section. The first heat insulation device moves synchronously with the base frame 3, and its aluminosilicate fiber blanket layer 10 extends outward to abut against the inner wall of the heating channel 2, always dividing the heating channel 2 into two independently temperature-controlled zones.

[0029] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0030] The embodiments described above are merely illustrative of several implementations of the present invention, and while their descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pressure-resistant and waterproof desiccant preparation and molding apparatus, characterized in that: include: The furnace body comprises a heating channel on the furnace body, several heating units within the heating channel, a base frame slidably mounted inside the furnace body via a drive device, a first mesh belt conveyor mounted on the base frame, and a second mesh belt conveyor mounted on the base frame and connected to the first mesh belt conveyor. The first mesh belt conveyor is higher than the second mesh belt conveyor. A guide plate is also provided between the first and second mesh belt conveyors. Baffles are also provided on both sides of the first and second mesh belt conveyors on the base frame. A first heat insulation device is also provided on the base frame between the first and second mesh belt conveyors. A second heat insulation device is also provided at the bottom of the base frame between the first and second mesh belt conveyors.

2. The pressure-resistant and waterproof desiccant preparation and molding device according to claim 1, characterized in that: The first heat insulation device includes: a main partition plate located on the base frame between the first mesh belt conveyor and the second mesh belt conveyor; a through hole on the main partition plate; aluminum silicate fiber blanket layers respectively located on both sides of the main partition plate; and a mirror stainless steel reflector layer located on the aluminum silicate fiber blanket layers. The aluminum silicate fiber blanket layers extend outward and abut against the heating channel.

3. The pressure-resistant and waterproof desiccant preparation and molding device according to claim 2, characterized in that: The main partition is also provided with several springs, the other end of which passes through the aluminum silicate fiber blanket layer and is fixedly connected to the mirror stainless steel reflector layer. The back of the mirror stainless steel reflector layer is provided with several turbulence plates.

4. The pressure-resistant and waterproof desiccant preparation and molding device according to claim 2, characterized in that: The surface of the contact portion of the aluminum silicate fiber blanket layer is also provided with a binding cloth, which is a high-temperature resistant PTFE fiber cloth or graphite fiber cloth, in order to reduce the sliding friction resistance between the blanket and the inner wall of the heating channel.

5. The pressure-resistant and waterproof desiccant preparation and molding device according to claim 1, characterized in that: The driving device includes: several V-shaped tracks extending axially along the heating channel within the heating channel; V-shaped rollers matching the tracks at the bottom of the base frame; a rack at the bottom of the base frame; rotary drive components at both ends of the furnace body; and gears matching the rack on the rotating shaft of the rotary drive components.

6. The pressure-resistant and waterproof desiccant preparation and molding apparatus according to claim 1, characterized in that: The heating unit includes: an installation slot located in the heating channel, a far-infrared heating plate located in the installation slot, a circulating fan located inside the furnace with its air outlet at the top of the heating channel, and a return air pipe located inside the furnace with one end connected to the heating channel and the other end connected to the circulating fan. The installation slot is located above and to the side of the first mesh belt conveyor and the second mesh belt conveyor.

7. The pressure-resistant and waterproof desiccant preparation and molding apparatus according to claim 1, characterized in that: A reflective base plate is also provided on the base frame below the first mesh belt conveyor and the second mesh belt conveyor.

8. The pressure-resistant and waterproof desiccant preparation and molding apparatus according to claim 1, characterized in that: The guide plate is provided with a guide groove, and the guide groove is also provided with several rows of rake teeth.

9. A production process for a pressure-resistant and waterproof desiccant, characterized in that: Includes the following steps: S1 gel preparation involves mixing sodium silicate solution with dilute sulfuric acid, controlling the reaction temperature at 30-50°C, stirring in a reaction vessel to generate silica gel, granulating the gel to obtain wet silica gel particles with a particle size of 1-4 mm. S2 aging involves placing wet silica gel particles into an aging tank, adding a dilute acid solution with a pH of 2-4, and aging at a constant temperature of 40-60°C for 2-6 hours to further condense the silica-oxygen bond network inside the gel and initially establish the skeletal structure. S3 washing agent: repeatedly wash the aged silicone particles with deionized water to remove residual sodium sulfate and other byproducts. S4 Drying and Calcination: The washed wet silica gel particles are fed into the molding device and calcined using a segmented temperature control process. S5 screening and packaging: After drying and calcining, the silica gel granules are graded by particle size using a vibrating screen to remove broken particles. Qualified finished products are then sealed in bags.

10. The production process of a pressure-resistant and waterproof desiccant according to claim 9, characterized in that: In step S4, the segmented temperature control process includes: S41 pre-drying section: heat to 80-100°C and maintain for 30-60 minutes to remove surface free water; In the S42 calcination strengthening section, the temperature is further increased to 200-300°C and maintained for 2-4 hours to promote the aggregation of silica particles and the shrinkage of the skeleton, thereby improving particle strength. The S43 cooling section allows the material to be discharged naturally at a temperature below 60°C.

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