A kind of film material forming and infiltration with drying machine

Abstract

The application discloses a film material forming and drying machine, which comprises an upper drying assembly and a lower drying assembly located on the front side and the back side of a mesh conveyor belt respectively to realize synchronous drying of the front and back sides of the material to be dried, so that the material to be dried is heated more uniformly; the upper drying assembly comprises a gas dispersion assembly arranged in the inside, so that the air flow of the air supply device can be uniformly dispersed to the surface of the material to be dried and the air flow size can be effectively adjusted; meanwhile, a buffer structure is arranged in the first air duct, the buffer structure can slow down the wind speed in the first air duct, and the air flow is prevented from being too large to cause uneven distribution of the air flow, which can cause tearing of the film material and physical damage to a certain extent when the film material is blown; a condensing assembly is arranged below the second heating assembly, the second heating assembly comprises a water vapor passage penetrating through the upper and lower parts, water vapor generated by the drying material passes through the water vapor passage downwardly and enters the condensing assembly to generate condensed water, and the water vapor is prevented from causing the material to be dried to be damp.

Description

Technical Field

[0001] This invention relates to the field of drying technology, and more specifically, to a film-forming apparatus and a drying machine for impregnation. Background Technology

[0002] In the field of thin film material forming and impregnation, thin films are prone to shrinkage and wrinkling during heat treatment, and the materials themselves are also prone to reabsorbing moisture after drying when exposed to water vapor in the environment.

[0003] In existing technologies, infrared drying, hot air drying, and microwave drying are three commonly used drying methods. Infrared drying ovens utilize infrared radiation drying, and their drying efficiency is determined by the infrared absorption capacity of the material being dried. However, the heat generated by the infrared drying tube itself during the energization process cannot be directly utilized, and the water vapor generated during infrared drying forms mist, affecting the light transmittance of the infrared drying tube and causing secondary moisture re-entry into the material. Hot air drying, while effectively removing surface water vapor, introduces it into the production environment, still posing a risk of secondary moisture re-entry. Furthermore, the uneven airflow distribution in traditional hot air drying can cause tearing and physical damage to thin films during blowing. Hot air originates from a fan blowing over heated wires; this only removes heat from the surface of the heating wires, failing to effectively utilize the infrared heat energy emitted by the wires. Microwave drying utilizes the principle that microwaves are high-frequency electromagnetic waves with frequencies ranging from 300 MHz to 300 MHz and wavelengths from 1 mm to 1 meter. Microwaves possess unique characteristics of electric fields, including short oscillation periods, strong penetrating power, and the ability to produce specific effects through interaction with matter. Microwaves are a method of internal heating. When wet materials are placed within a high-frequency microwave electric field with an extremely short oscillation period, the water molecules inside become polarized and align themselves neatly along the direction of the microwave electric field. They then rapidly rotate with the alternating changes in the direction of the high-frequency alternating electric field, generating intense collisions and friction (up to hundreds of millions of times per second). As a result, some microwave energy is converted into molecular kinetic energy, manifesting as heat, raising the temperature of the water and causing it to leave the material, thus drying it. In other words, after microwaves enter and are absorbed by the material, their energy is converted into heat energy within the material's dielectric. However, for thin-film materials, the intense internal oscillation and vaporization of water molecules will damage the microporous structure of the thin-film material. Furthermore, microwave heating of highly conductive materials can produce spark discharges, which can not only burn the material surface but also pose serious safety hazards.

[0004] Therefore, there is an urgent need for a dryer that can better meet the process characteristics of thin film materials in the field of film forming and impregnation. Summary of the Invention

[0005] The purpose of this invention is to provide a dryer that conforms to the forming or wetting characteristics of film materials.

[0006] This invention provides a drying machine for forming and impregnating thin film materials, including an upper drying assembly, a lower drying assembly, an air supply assembly, and a mesh fabric conveying assembly; the mesh fabric conveying assembly includes a mesh fabric conveyor belt;

[0007] The upper drying assembly and the lower drying assembly are respectively arranged opposite to each other on the front and back sides of the mesh conveyor belt;

[0008] The upper drying assembly includes an upper shell, a gas dispersion assembly, and a heating assembly. The upper shell includes an air inlet at the top and an air outlet at the bottom. An air supply device is installed at the air inlet to generate airflow from the air inlet to the air outlet. The gas dispersion assembly and the heating assembly are arranged sequentially from top to bottom along the direction of the airflow inside the upper shell. The gas dispersion assembly is used to slow down the airflow speed and make the airflow blowing towards the heating assembly evenly distributed inside the upper shell.

[0009] The heating assembly includes a first heating component and a filler. Multiple first heating components are arranged sequentially below the gas dispersion component. The filler is filled inside the upper shell and located below the gas dispersion component. The first heating component includes a first air duct. The inlet of the first air duct faces the gas dispersion structure, and the outlet of the first air duct faces the front side of the mesh conveyor belt. A buffer structure is provided inside the first air duct to reduce the wind speed inside the first air duct.

[0010] The lower drying component includes a lower housing with an opening at the top facing the opposite side of the mesh conveyor belt. A second heating component is provided at the opening at the top of the lower housing, and a condensing component is provided below the second heating component. The second heating component includes a water vapor channel that runs vertically through the material. Water vapor generated by drying the material passes through the water vapor channel and enters the condensing component to generate condensate.

[0011] Optionally, the first heating component includes an inclined heat-concentrating ventilation duct, which includes a pipe body and a heat-concentrating circular chamber disposed on the pipe body. The inner diameter of the heat-concentrating circular chamber is larger than the pipe diameter of the pipe body. The pipe body is divided into multiple segments by multiple heat-concentrating circular chambers. A segment of the pipe body is connected to each radially opposite side of the heat-concentrating circular chamber. Multiple carbon fiber electric heating tubes are evenly distributed on the inner circumference of the heat-concentrating circular chamber, and a heat-concentrating graphite rod is coaxially disposed at the axis of the heat-concentrating circular chamber.

[0012] Optionally, a heat-concentrating ventilation pipe cavity inlet with a semi-circular cross-section is connected to the end of the pipe body near the gas dispersion structure, with the heat-concentrating ventilation pipe cavity inlet facing the gas dispersion structure.

[0013] And / or, the surface of the heat-concentrating graphite rod is provided with graphite block protrusions arranged radially in a staggered manner;

[0014] And / or, the inner wall of the heat-concentrating circular chamber is made of sheet metal with a high reflectivity mirror polishing process by stamping.

[0015] Optionally, a ventilation duct outlet is formed on the side of the pipe facing the mesh conveyor belt, and the ventilation duct outlet is set in a horizontal direction.

[0016] Optionally, multiple heat-concentrating ventilation ducts are arranged in two groups in a figure-eight symmetrical arrangement inside the upper shell, forming a triangular air duct at the location of the symmetrical plane;

[0017] Multiple layers of grille heating plates are installed from top to bottom inside the triangular air duct.

[0018] Optionally, the gas dispersion component includes a gas grid distribution plate, which has multiple layers arranged from top to bottom, with the pores of the gas grid distribution plate staggered between the layers.

[0019] Optionally, the upper housing includes a first part and a second part connected in sequence;

[0020] The horizontal cross-sectional area of ​​the first part gradually increases from top to bottom, while the horizontal cross-section of the second part is rectangular.

[0021] The gas grid distribution plate is disposed inside the first part, and the first heating component is disposed inside the second part.

[0022] Optionally, the second heating component includes a steam-heated grid mesh liner and a steam generator, wherein the steam-heated grid mesh liner is located on the opposite side of the mesh conveyor belt, and the steam generator supplies steam to the steam-heated grid mesh liner.

[0023] Optionally, the second heating component also includes a steam condensing component and a closed water tank; the closed water tank supplies water to the steam generator, the steam generator's steam outlet is connected to the air inlet of the steam internal heat grid mesh liner, the steam internal heat grid mesh liner's air outlet is connected to the air inlet of the steam condensing component, and the steam condensing component's water outlet is connected to the closed water tank.

[0024] Optionally, the dryer also includes a steam-water separator; the condensation assembly includes a condenser aluminum plate;

[0025] The steam-water separator pipeline is connected to the bottom of the lower shell, and the outlet of the steam-water separator is connected to a closed water tank; an induced draft fan is connected to the pipeline between the steam-water separator and the lower shell.

[0026] According to the technical content disclosed in this invention, the following beneficial effects are achieved:

[0027] The dryer for forming and impregnating thin film materials provided by this invention includes an upper drying component and a lower drying component located on the front and back sides of the mesh conveyor belt, respectively, to achieve simultaneous drying of both sides of the material to be dried, making the material to be dried more evenly heated. The upper drying component includes a gas dispersion component that enables the airflow from the air supply device to be evenly dispersed to the surface of the material to be dried and can effectively adjust the airflow force. At the same time, a buffer structure is provided in the first air duct, which can slow down the air speed in the first air duct and prevent excessive airflow from causing uneven air volume distribution, which could cause tearing and physical damage to ultra-thin paper or film during blowing. A condensation component is provided below the second heating component. The second heating component includes a water vapor channel that runs vertically through it. The water vapor generated by the drying material passes downward through the water vapor channel and enters the condensation component to produce condensate, preventing the water vapor from causing the material to be dried to become damp.

[0028] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0030] Figure 1 This is a structural diagram of the dryer for forming and impregnating thin film materials according to the present invention.

[0031] Figure 2 This is a structural diagram of the first heating component of the present invention.

[0032] Figure 3 This is a first-view structural diagram of the thermally charged graphite rod of the present invention.

[0033] Figure 4 This is a second-view structural diagram of the thermally charged graphite rod of the present invention.

[0034] Figure 5 This is a structural diagram of the steam internal heating grid mesh lining plate of the present invention.

[0035] Explanation of reference numerals in the attached drawings: 1. Variable frequency blower; 2. First part; 3. Gas grid distribution plate; 4. Inner chamber of the upper dryer; 5. Aluminum silicate cotton filling; 6. Heat-concentrating ventilation duct; 7. Flow rate detector; 8. Loading platform; 9. Active return roller; 10. Steam condensation assembly; 11. Mesh tensioner; 12. Directional roller; 13. Mesh conveyor belt; 14. Enclosed return water supply tank; 15. Variable frequency liquid supply pump; 16. Exhaust fan; 17. Steam... 18. Water separator; 19. Steam generator; 20. Lower dryer inner chamber; 21. Steam internal heating grid mesh liner; 22. Condensing aluminum plate; 23. Temperature sensor; 24. Grid heating plate; 25. Ventilation pipe outlet; 26. Heat-concentrating graphite rod; 27. Carbon fiber electric heating tube; 28. Heat-concentrating circular chamber; 29. ​​Heat-concentrating ventilation pipe inlet; 30. Liner body; 31. Liner grid holes; 32. Pressure sensor; 33. Graphite block protrusion. Detailed Implementation

[0036] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0037] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0038] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0039] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0040] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0041] See Figure 1This invention discloses a dryer for forming and impregnating thin film materials, including an upper drying assembly, a lower drying assembly, an air supply assembly, and a mesh conveying assembly; the air supply assembly is a variable frequency blower 1; the mesh conveying assembly is a mesh conveyor belt, which includes a mesh conveyor belt 13, and a mesh tensioner 11 and a guide roller 12 for supporting the mesh conveyor belt 13; the upper drying assembly and the lower drying assembly are respectively arranged opposite to each other on the front and back sides of the mesh conveyor belt 13; the mesh conveyor belt 13 can drive the material to be dried to move horizontally in the gap between the upper drying assembly and the lower drying assembly.

[0042] Combination Figures 2 to 4 The upper drying assembly includes an upper shell, a gas dispersion assembly, and a heating assembly. The upper shell includes an air inlet at the top and an air outlet at the bottom. A variable frequency blower 1 is installed at the air inlet to generate airflow from the air inlet to the air outlet. The gas dispersion assembly includes a gas grid distribution plate 3. The gas grid distribution plate 3 and the heating assembly are arranged sequentially from top to bottom along the direction of the airflow inside the upper shell. The gas grid distribution plate 3 is used to slow down the airflow speed and make the airflow blowing towards the heating assembly evenly distributed inside the upper shell. Specifically, the upper shell includes a first part 2 and a second part connected in sequence. The horizontal cross-sectional area of ​​the first part 2 gradually increases from top to bottom, and the horizontal cross-section of the second part is rectangular. The gas grid distribution plate 3 is arranged in multiple layers from top to bottom inside the first part, and the pores of the gas grid distribution plate are staggered between the layers.

[0043] The heating assembly includes a first heating component, a grid heating plate 23, and a filler, all of which are disposed inside the second part. The filler is aluminum silicate cotton filler 5. Multiple first heating components are arranged sequentially below the gas dispersion assembly. The aluminum silicate cotton filler 5 fills the interior of the upper shell and is located below the gas dispersion assembly. The first heating component includes a first air duct. The inlet of the first air duct faces the gas dispersion structure, and the outlet of the first air duct faces the front side of the mesh conveyor belt. A buffer structure is provided inside the first air duct to reduce the wind speed inside the first air duct.

[0044] Furthermore, the first heating component includes an inclined heat-concentrating ventilation pipe 6. Multiple heat-concentrating ventilation pipes 6 are arranged in two groups in a figure-eight symmetrical arrangement inside the upper shell, forming a triangular air duct at the position of the symmetrical plane. Multiple layers of grid heating plates 23 are arranged sequentially from top to bottom inside the triangular air duct.

[0045] The heat-concentrating ventilation duct 6 includes a duct body and a heat-concentrating circular chamber 27 disposed on the duct body. The inner diameter of the heat-concentrating circular chamber 27 is larger than the diameter of the duct body. The duct body is divided into multiple segments by the heat-concentrating circular chamber 27, and a duct body segment is connected to each radially opposite side of the heat-concentrating circular chamber 27. A heat-concentrating ventilation duct inlet 28 with a semi-circular cross-section is connected to the end of the duct body near the gas dispersion structure, and the heat-concentrating ventilation duct inlet 28 faces the gas dispersion structure. Multiple carbon fiber electric heating tubes 26 are evenly distributed on the inner circumference of the heat-concentrating circular chamber 27, and a heat-concentrating graphite rod 25 is coaxially disposed at the axis of the heat-concentrating circular chamber 27. A ventilation duct outlet 24 is formed on the side of the duct body facing the mesh conveyor belt 13, and the ventilation duct outlet 24 is arranged in a horizontal direction.

[0046] As clean, dry air passes through the heating circular chamber 27, the sudden increase in space reduces the airflow velocity. Air blowing directly onto the heating graphite rod 25 carries away heat from it, while air filling the heating circular chamber 27 carries away heat from the surface of the carbon fiber electric heating tube 26. Infrared thermal energy is fully utilized to improve the energy efficiency of the drying equipment for special fiber ultrathin paper or film. Passing through multiple heating circular chambers 27 achieves volume expansion and contraction, resulting in secondary uniform distribution of gas and temperature, and reducing air pressure and velocity in the process. This improves the uniformity of hot air in the drying equipment for thin film materials.

[0047] Furthermore, the surface of the heat-concentrating graphite rod 25 is provided with graphite block protrusions 32 arranged radially in a staggered manner; the inner wall of the heat-concentrating circular chamber 27 is made of sheet metal with a high reflectivity mirror polishing process by stamping.

[0048] The lower drying assembly includes a lower housing, which includes a lower dryer chamber 19. The lower dryer chamber 19 has an opening at the top and faces the opposite side of the mesh conveyor belt. A second heating assembly is provided at the opening at the top of the lower dryer chamber 19. A condensing assembly is provided below the second heating assembly. The second heating assembly includes a water vapor channel that runs vertically through the material. The water vapor generated by the drying material passes downward through the water vapor channel and enters the condensing assembly to generate condensate.

[0049] Furthermore, combined with Figure 5The second heating assembly includes a steam internal heating grid mesh liner 20 and a steam generator 18. The steam internal heating grid mesh liner is located on the opposite side of the mesh conveyor belt 13, and the steam generator 18 supplies steam to the steam internal heating grid mesh liner 20. The steam internal heating grid mesh liner 20 includes a liner body 29, on which multiple liner mesh holes 30 are provided. The liner mesh holes 30 serve as water vapor channels in this invention. The second heating assembly also includes a steam condensation assembly and a closed-loop return water supply tank 14, which acts as a closed water tank. The closed-loop return water supply tank 14 supplies water to the steam generator 18. The steam outlet of the steam generator 18 is connected to the air inlet of the steam internal heating grid mesh liner 20, the air outlet of the steam internal heating grid mesh liner 20 is connected to the air inlet of the steam condensation assembly 10, and the water outlet of the steam condensation assembly 10 is connected to the closed-loop return water supply tank 14.

[0050] The dryer also includes a steam-water separator 17; the condensation assembly includes a condensing aluminum plate 21; the steam-water separator 17 is connected to the bottom of the inner chamber 19 of the lower dryer, and the outlet of the steam-water separator 17 is connected to a closed return water supply tank 14; an induced draft fan 16 is connected to the pipeline between the steam-water separator 17 and the lower shell.

[0051] A dryer for forming and impregnating thin film materials includes an upper drying assembly and a lower drying assembly. The upper drying assembly includes an upper shell, which comprises a first part 2 and a second part. The first part 2 includes a dryer inclined distribution layer, and the second part includes an upper dryer inner chamber 4. The dryer inclined distribution layer and the upper dryer inner chamber 4 are connected by a sealed connection or full welding. A variable frequency blower 1 is connected to the top opening of the dryer inclined distribution layer. A gas grid distribution plate 3 is installed inside the dryer inclined distribution layer and has a multi-layer structure with more than or equal to 3 layers, and the pores between the layers are staggered. The upper dryer inner chamber 4 contains heat-concentrating ventilation pipes 6 evenly distributed at horizontal angles of 15° to 85°. The dry and clean air introduced by the variable frequency blower 1 is evenly distributed by the gas grid distribution plate 3 and can only pass through the heat-concentrating ventilation pipes 6 and the middle triangular area through the grid heating plate 23 to reach the mesh conveyor belt 13 carrying the material. The remaining areas of the inclined distribution layer and the upper dryer inner chamber 4 are filled with aluminum silicate cotton filling material 5. The heat-concentrating ventilation duct 6 has a square cavity. The inlet 28 of the heat-concentrating ventilation duct cavity is designed as a semi-circular arc. Carbon fiber electric heating tubes 26 are evenly distributed on the arc, and a heat-concentrating graphite rod 25 is installed at the center.

[0052] The surface of the heat-concentrating graphite rod 25 is like Figure 3 and Figure 4 The graphite blocks 32 arranged in a radially staggered trapezoidal pattern increase the surface area for receiving infrared radiation. They also increase the contact area between the dry clean air and the heat-gathering graphite rod 25, thus heating the dry clean air more effectively. They also provide some resistance to the dry clean air, allowing the air to be distributed more evenly within the heat-gathering circular chamber 27 and reducing the wind speed.

[0053] The inner walls of the inlet 28 and the circular heat-gathering chamber 27 of the heat-gathering ventilation duct are made of sheet metal with a high reflectivity and mirror polishing process. There is at least one circular heat-gathering chamber 27 in the middle section of the duct. Carbon fiber electric heating tubes 26 are evenly distributed within the circular heat-gathering chamber 27, and a heat-gathering graphite rod 25 is installed at the center. The infrared radiation emitted by the carbon fiber electric heating tubes 26 will directly or be reflected by the mirror surface of the circular heat-gathering chamber 27 onto the central heat-gathering graphite rod 25. As clean, dry air passes through the circular heat-gathering chamber 27, the air velocity decreases due to the sudden increase in space. Air directly blowing onto the heat-gathering graphite rod 25 will carry away the heat from the graphite rod 25, while air filling the circular heat-gathering chamber 27 will carry away the surface heat from the carbon fiber electric heating tubes 26. The ventilation duct outlet 24 has a cut at a corresponding 15°–85° angle, and after installation, the outlet 24 of the heat-gathering ventilation duct is horizontal.

[0054] The heat-concentrating ventilation ducts 6 are arranged in two groups in a figure-eight mirror pattern inside the inner chamber 4 of the upper dryer. The spaces between the heat-concentrating ventilation ducts 6 are filled with aluminum silicate cotton filler 5. A multi-layer grid heating plate 23 is installed in the middle triangular area of ​​the inner chamber 4 of the upper dryer. During normal operation, the hot air from the figure-eight layout of the heat-concentrating ventilation ducts 6 not only dries the material but also creates a pair of opposing horizontal forces on the surface of the material along the direction of the production line. This creates a micro-stretching effect on the surface of the material, the magnitude of which is determined by the wind speed, effectively preventing the material from shrinking and curling due to heat.

[0055] A steam internal heating grid liner 20 is horizontally installed at the top opening of the lower dryer inner chamber 19, and condensing aluminum plates 21 are staggered inside the lower dryer inner chamber 19. A material loading platform 8 is provided on each of the left and right sides of the lower dryer inner chamber 19. Pressure sensors 31 are respectively installed on the steam inlet end of the steam condensation assembly 10 and the closed return water supply tank 14.

[0056] Working principle:

[0057] Dry, clean air enters the inclined distribution layer of the dryer via the variable frequency blower 1, and is evenly redistributed by the gas grid distribution plate 3 before entering the heat-concentrating ventilation duct 6. The air enters the heat-concentrating ventilation duct 6 through the inlet 28, where it is heated by the carbon fiber electric heating tube 26 and the heat-concentrating graphite rod 25. As it passes through multiple heat-concentrating circular chambers 27, its volume expands and contracts, resulting in a secondary uniform distribution of gas and temperature, and a reduction in air pressure and velocity. Air in the central area flows vertically downwards through the grid heating plate 23. Finally, the heated, clean air is evenly blown onto the material carried in by the mesh conveyor belt 13 via the loading platform 8. The temperature of the clean air is fed back to the PLC temperature control system by the temperature sensor 22 located between the upper and lower drying components. The PLC temperature control system adjusts the output power of the carbon fiber electric heating tube 26 according to the temperature set in the process, thereby achieving temperature regulation. The back of the mesh conveyor belt 13 contacts the steam internal heating grid mesh liner 20. The steam internal heating grid mesh liner 20 contains saturated steam at a high temperature of 120℃-150℃. The steam internal heating grid mesh liner 20 forms a heat source at the bottom of the mesh conveyor belt 13, baking the material from the bottom of the mesh. Most of the moisture in the material, after being baked on both sides, enters the lower dryer chamber 19 through the grid structure of the steam internal heating grid mesh liner 20 with the hot air from the top. A small amount is discharged from the material inlet / outlet at the loading platform 8. The discharge volume at the inlet / outlet is detected and fed back by the gas flow rate detector 7, and the suction force of the induced draft fan 16 is controlled according to the process settings by the PLC to regulate the discharge volume at the inlet / outlet. Most of the water vapor condenses into water through the condensing aluminum plate 21 and then flows back to the closed return water supply tank 14 through the steam-water separator 17, serving as a portion of the recycled water in the steam heating system. The entire steam heating system is closed. The closed return water supply tank 14 uses a pressure level sensor to link the water supply valve or drain valve to adjust the water volume in the tank so as to maintain the steam generator 18 to generate enough steam to heat the internal heat grid liner 20. The steam passing through the internal heat grid liner 20 finally passes through a sealed pipe and condenses into water in the condenser of the steam condensation assembly 10 before returning to the closed return water supply tank 14 to complete the cycle.

[0058] In summary, the drying machine for molding and impregnating thin film materials provided by the present invention has the following beneficial effects:

[0059] (1) The hot air from the figure-eight heat-gathering ventilation pipe not only plays a drying role, but also forms a pair of horizontal forces in opposite directions on the material surface along the production line running direction. This will create a micro-stretching effect on the material surface, the size of which is determined by the wind speed, effectively preventing the material from shrinking and curling due to heat, and solving the problem of shrinkage and wrinkling of film materials during the molding process or after being soaked in liquid.

[0060] (2) The material discharge rate at the inlet and outlet is monitored by a gas velocity detector. The feedback from the detector is used to control the suction force of the induced draft fan according to the process settings via PLC, thereby controlling the discharge rate at the inlet and outlet. Most of the water vapor is condensed into water by the aluminum condenser and then flows back to the closed return water supply tank through the steam-water separator as part of the recycled water to continue participating in the steam heating system. This reduces the impact of the drying equipment on the ambient humidity and solves the problem of film materials easily absorbing moisture again after drying.

[0061] (3) As the space suddenly expands in the circular heating chamber, the air velocity decreases. The air blowing directly onto the heating graphite rod will carry away the heat from the graphite rod, while the air filling the circular heating chamber will carry away the heat from the surface of the carbon fiber electric heating tube. Infrared thermal energy is fully utilized to improve the energy efficiency of special fiber ultrathin paper or film drying equipment;

[0062] (4) The volume is enlarged and reduced when passing through multiple heat-concentrating circular chambers, resulting in a secondary uniform distribution of gas and temperature, and reducing gas pressure and velocity in the process. This improves the uniformity of hot air in drying equipment for thin film materials;

[0063] (5) Most of the water vapor condenses into water through the aluminum condenser plate and then flows back to the closed return water supply tank through the steam-water separator as a part of the recycled water to continue participating in the steam heating system. The entire steam heating system is closed. The closed return water supply tank uses a pressure level sensor to link the water supply valve or drain valve to adjust the water volume in the tank to maintain a sufficient amount of steam generated by the steam generator to heat the internal heat grid lining plate. The steam passing through the internal heat grid lining plate finally condenses into water in the condenser through a sealed pipe and returns to the closed return water supply tank to complete the cycle and improve water resource utilization.

[0064] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A drying machine for forming and impregnating thin film materials, characterized in that, include: The system includes an upper drying assembly, a lower drying assembly, an air supply assembly, and a mesh fabric conveying assembly; the mesh fabric conveying assembly includes a mesh fabric conveyor belt. The upper drying component and the lower drying component are respectively arranged opposite to each other on the front and back sides of the mesh conveyor belt; The upper drying assembly includes an upper shell, a gas dispersion assembly, and a heating assembly. The upper shell includes an air inlet at the top and an air outlet at the bottom. An air supply device is installed at the air inlet to generate an airflow from the air inlet to the air outlet. The gas dispersion assembly and the heating assembly are arranged sequentially from top to bottom along the direction of the airflow inside the upper shell. The gas dispersion assembly is used to reduce the wind speed of the airflow and make the airflow blowing towards the heating assembly evenly distributed inside the upper shell. The heating assembly includes a first heating component and a filler. A plurality of first heating components are arranged sequentially below the gas dispersion component. The filler is filled inside the upper housing and located below the gas dispersion component. The first heating component includes a first air duct. The inlet of the first air duct faces the gas dispersion component, and the outlet of the first air duct faces the front side of the mesh conveyor belt. A buffer structure is provided inside the first air duct to reduce the wind speed inside the first air duct. The lower drying assembly includes a lower housing with an opening at the top facing the opposite side of the mesh conveyor belt. A second heating assembly is provided at the opening at the top of the lower housing, and a condensing assembly is provided below the second heating assembly. The second heating assembly includes a water vapor channel that runs vertically through the material. Water vapor generated by drying the material passes downward through the water vapor channel and enters the condensing assembly to generate condensate. The first heating component includes an inclined heat-concentrating ventilation duct, which includes a pipe body and a heat-concentrating circular chamber disposed on the pipe body. The inner diameter of the heat-concentrating circular chamber is larger than the diameter of the pipe body. The pipe body is divided into multiple segments by multiple heat-concentrating circular chambers. A section of the pipe body is connected to each radially opposite side of the heat-concentrating circular chamber. Multiple carbon fiber electric heating tubes are evenly distributed on the inner circumference of the heat-concentrating circular chamber, and a heat-concentrating graphite rod is coaxially disposed at the axis of the heat-concentrating circular chamber. A semi-circular inlet of a heat-concentrating ventilation pipe is connected to the end of the pipe body near the gas dispersion component, and the inlet of the heat-concentrating ventilation pipe faces the gas dispersion component. The surface of the heat-concentrating graphite rod is provided with graphite block protrusions arranged radially in a staggered manner; The inner wall of the heat-gathering circular chamber is made of sheet metal with a high reflectivity and mirror polishing process by stamping. The pipe body forms a ventilation pipe outlet on the side facing the mesh conveyor belt, and the ventilation pipe outlet is arranged horizontally; The multiple heat-concentrating ventilation pipes are arranged in two groups inside the upper shell in a figure-eight symmetrical configuration, forming a triangular air duct at the location of the symmetrical plane; The triangular air duct is equipped with multiple layers of grille heating plates arranged from top to bottom.

2. The drying machine for forming and impregnating thin film materials according to claim 1, characterized in that: The gas dispersion component includes a gas grid distribution plate, which has multiple layers arranged from top to bottom, with the pores of the gas grid distribution plate staggered between the layers.

3. The drying machine for forming and impregnating thin film materials according to claim 2, characterized in that: The upper housing comprises a first part and a second part connected in sequence; The horizontal cross-sectional area of ​​the first part gradually increases from top to bottom, and the horizontal cross-section of the second part is rectangular; The gas grid distribution plate is disposed inside the first part, and the first heating component is disposed inside the second part.

4. The drying machine for forming and impregnating thin film materials according to claim 1, characterized in that: The second heating component includes a steam-heated grid mesh liner and a steam generator. The steam-heated grid mesh liner is located on the opposite side of the mesh conveyor belt, and the steam generator supplies steam to the steam-heated grid mesh liner.

5. The drying machine for forming and impregnating thin film materials according to claim 4, characterized in that: The second heating component further includes a steam condensation component and a closed water tank; the closed water tank supplies water to the steam generator, the steam outlet of the steam generator is connected to the air inlet of the steam internal heat grid mesh lining plate, the air outlet of the steam internal heat grid mesh lining plate is connected to the air inlet of the steam condensation component, and the water outlet of the steam condensation component is connected to the closed water tank.

6. The drying machine for forming and impregnating thin film materials according to claim 5, characterized in that: The dryer also includes a steam-water separator; the condensation assembly includes a condensing aluminum plate. The steam-water separator pipeline is connected to the bottom of the lower shell, and the outlet of the steam-water separator is connected to the closed water tank; an induced draft fan is connected to the pipeline between the steam-water separator and the lower shell.

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