Air roller furnace for sintering and heat treatment of aerogel fiber blanket

Abstract

The invention is suitable for the technical field of aerogel fiber blanket sintering and heat treatment, and provides an air roller furnace for aerogel fiber blanket sintering and heat treatment, the air roller furnace comprises a kiln body, the kiln body sequentially comprises an inlet transition area, a heating area, a cooling area, a cooling area and an outlet transition area from right to left, and a plurality of conveying rollers are arranged in the kiln body; the conveying rollers are connected with a conveying driving assembly, a first heating assembly is arranged in the heating area, a second heating assembly is arranged in the cooling area, a cooling assembly is arranged in the cooling area, a plurality of roller bars are arranged in the heating area and located above the conveying rollers, and the roller bars are connected with a rotation driving assembly. The inlet transition area, the heating area, the cooling area, the cooling area and the outlet transition area are integrated into the integrated equipment, so that the efficiency is improved, the accurate control of the temperature is ensured, the production period is shortened, and the cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of aerogel fiber blanket sintering and heat treatment technology, and particularly relates to an air roller furnace for aerogel fiber blanket sintering and heat treatment. Background Technology

[0002] Sintering and heat treatment are crucial steps in the preparation of aerogel fiber blankets, primarily used to improve their structural stability, mechanical strength, and heat resistance. The sintering process typically involves heating the aerogel fiber blanket at high temperatures, altering its internal microstructure to increase its mechanical strength and density. The main purpose of aerogel sintering is to remove organic solvents and moisture, and to promote bonding between inorganic materials. Heat treatment controls the microstructure of the aerogel fiber blanket through heating, improving its physical and chemical properties, especially thermal stability and refractoriness.

[0003] The sintering and heat treatment of aerogel fiber blankets is a process that improves the structural stability, strength and thermal properties of the material by precisely controlling the temperature, atmosphere and time. Through these treatments, aerogel can play an important role in many fields with high temperature, low temperature and high thermal insulation requirements (such as aerospace, construction and electronics).

[0004] The sintering and heat treatment process of aerogel fiber blankets is complicated and often requires several pieces of equipment to be used sequentially. Each piece of equipment has its own limitations. For example, some equipment is difficult to control the temperature precisely, resulting in poor sintering or heat treatment effects; some equipment is not flexible enough in terms of atmosphere adjustment and cannot meet the special requirements of different process stages; and some equipment is inefficient in terms of processing time, which prolongs the entire production cycle and increases production costs.

[0005] In this regard, this application proposes an air roller furnace for sintering and heat treatment of aerogel fiber blankets. Summary of the Invention

[0006] The purpose of this invention is to provide an air roller furnace for sintering and heat treatment of aerogel fiber blankets, so as to solve the problems in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an air roller furnace for sintering and heat treatment of aerogel fiber blankets, comprising a kiln body, wherein the kiln body comprises, from right to left, an inlet transition zone, a heating zone, a cooling zone, a cooling zone, and an outlet transition zone; the interior of the kiln body is provided with a plurality of conveying rollers, the conveying rollers being connected to a conveying drive assembly; the interior of the heating zone is provided with a first heating assembly; the interior of the cooling zone is provided with a second heating assembly; the interior of the cooling zone is provided with a cooling assembly; the interior of the heating zone, above the conveying rollers, is provided with a plurality of rollers, the rollers being connected to a rotation drive assembly; the right end of the kiln body is provided with a feed pipe; and the left end of the kiln body is provided with a discharge pipe.

[0008] Preferably, the conveying drive assembly includes a first motor, the output shaft of the first motor is provided with a first gear, one end of the conveying roller located at the rightmost end of the kiln body is provided with a first double sprocket, the remaining conveying rollers are all connected to the first sprocket at the ends located on one side of the first double sprocket, the first double sprocket and the first sprocket are connected together by a first chain, and the first gear and the first double sprocket are connected by a second chain.

[0009] Preferably, the rotation drive assembly includes a second motor, the output shaft of the second motor is connected to a second gear, a second double sprocket is provided at one end of the roller near the second gear, the remaining ends of the rollers located on one side of the second double sprocket are all connected to the second sprocket, a third chain is connected between the second sprocket and the second double sprocket, and a fourth chain is connected between the second gear and the second double sprocket.

[0010] Preferably, the first heating component includes a plurality of first silicon carbide heating rods, the plurality of first silicon carbide heating rods being distributed inside the heating zone, and a thermocouple being provided on the top surface of the heating zone.

[0011] Preferably, the second heating component includes a second silicon carbide heating rod, which is disposed inside the cooling zone, and a thermocouple is also provided on the top surface of the cooling zone.

[0012] Preferably, the cooling assembly includes a cold air duct that extends through the top surface of the cooling zone.

[0013] Preferably, the free end of the feed pipe is connected to a feed hopper.

[0014] This invention has at least the following beneficial effects: This invention integrates the inlet transition zone, heating zone, cooling zone, and outlet transition zone into a single unit, which improves efficiency, ensures precise temperature control, shortens the production cycle, and reduces costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the back structure of the heating zone of the present invention.

[0016] In the attached diagram, the following are the reference numerals: 1. Inlet transition zone; 2. Heating zone; 3. Cooling zone; 4. Cooling zone; 5. Outlet transition zone; 6. Feed pipe; 7. Discharge pipe; 8. Cold air pipe; 9. Conveyor roller; 10. Roller bar; 11. First double sprocket; 12. First gear; 13. First motor; 14. First sprocket; 15. First chain; 16. Second motor; 17. Second sprocket; 18. Second gear; 19. Third chain; 20. Second chain; 21. Fourth chain; 22. Feed hopper; 23. Thermocouple; 24. First silicon carbide heating rod; 25. Second silicon carbide heating rod. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0018] Please see Figure 1 , Figure 2 and Figure 3 This invention provides a technical solution: an air roller furnace for sintering and heat treatment of aerogel fiber blankets, comprising a kiln body, which from right to left includes an inlet transition zone 1, a heating zone 2, a cooling zone 3, a cooling zone 4, and an outlet transition zone 5. The kiln body has several conveying rollers 9 inside, specifically, the two ends of the conveying rollers 9 are rotatably connected to the inner wall of the kiln body, and the conveying rollers 9 are connected to a conveying drive assembly. The heating zone 2 has a first heating assembly inside, the cooling zone 3 has a second heating assembly inside, and the cooling zone 4 has a cooling assembly inside. The heating zone 2 has several rollers 10 located above the conveying rollers 9 inside, specifically, the two ends of the rollers 10 are rotatably connected to the inner wall of the heating zone 2, and the rollers 10 are connected to a rotation drive assembly. The right end of the kiln body has a feed pipe 6, and the left end of the kiln body has a discharge pipe 7. Specifically, both the feed pipe 6 and the discharge pipe 7 are fixedly connected to the kiln body.

[0019] Furthermore, the conveying drive assembly includes a first motor 13, the output shaft of the first motor 13 is provided with a first gear 12, specifically, the first gear 12 is fixedly connected to the output shaft of the first motor 13, one end of the conveying roller 9 located at the rightmost end of the kiln body is provided with a first double sprocket 11, specifically, the first double sprocket 11 is fixedly connected to the conveying roller 9, the remaining conveying rollers 9 are all connected to the ends of the first double sprocket 11 on one side with a first sprocket 14, specifically, the first sprocket 14 is fixedly connected to the conveying roller 9, the first double sprocket 11 and the first sprocket 14 are connected together by a first chain 15, and the first gear 12 and the first double sprocket 11 are connected by a second chain 20.

[0020] Furthermore, the rotation drive assembly includes a second motor 16, the output shaft of which is connected to a second gear 18. Specifically, the second gear 18 is fixedly connected to the output shaft of the second motor 16. A second double sprocket is provided at one end of the roller 10 near the second gear 18. Specifically, the second double sprocket is fixedly connected to the roller 10. The remaining ends of the roller 10 located on one side of the second double sprocket are all connected to second sprockets 17. Specifically, the second sprockets 17 are fixedly connected to the roller 10. A third chain 19 is connected between the second sprockets 17 and the second double sprockets. A fourth chain 21 is connected between the second gear 18 and the second double sprockets.

[0021] Furthermore, the first heating component includes a plurality of first silicon carbide heating rods 24, which are distributed inside the heating zone 2. A thermocouple 23 is provided on the top surface of the heating zone 2. Specifically, the thermocouple 23 and the first silicon carbide heating rods 24 are fixedly connected to the inner wall of the heating zone 2. The second heating component includes a second silicon carbide heating rod 25, which is disposed inside the cooling zone 3. A thermocouple 23 is also provided on the top surface of the cooling zone 3. Specifically, the thermocouple 23 and the second silicon carbide heating rod 25 are fixedly connected to the inner wall of the cooling zone 3. Both the first heating element and the second heating element are electrically connected to a power supply and a control system. The first silicon carbide heating rod 24 and the second silicon carbide heating rod 25 perform heating, the thermocouple 23 monitors the temperature, the power supply provides power, and the control system controls the temperature. The kiln body adopts an embedded touch screen control system, installed in an independent electrical control cabinet, connected to the kiln body via cables and thermocouple compensation wires for kiln body control; temperature control uses an imported temperature control module, directly implementing PID control for each temperature zone via a computer screen; the Siemens modular controller perfectly integrates an industrial PC and a PLC, and as a PLC, it can also control the logical cycle operation of the roller conveyor; the control system has the following characteristics: ① The temperature control module has a unique temperature control algorithm, which has extremely high temperature stability; ② The ring network topology increases the system's network backup (when a branch of the network fails, it does not affect the signal transmission of the entire system). ③ Real-time operating systems improve system reliability; ④ Future system scalability: The system has reserved sufficient hardware to facilitate the addition of functions such as remote fault diagnosis and maintenance in the future.

[0022] Furthermore, the cooling assembly includes a cold air duct 8, which passes through the top surface of the cooling zone 4. Specifically, the cold air duct 8 is fixedly connected to the top of the cooling zone 4.

[0023] Furthermore, the free end of the feed pipe 6 is connected to a feed hopper 22, specifically, the feed hopper 22 is fixedly connected to the feed pipe 6.

[0024] Working principle and usage process of this invention: The present invention is divided into an inlet transition zone 1, a heating zone 2, a cooling zone 3, and a cooling zone 4, and an outlet transition zone 5. The aerogel fiber blanket raw material enters the feed pipe 6 through the feed hopper 22 and falls onto the conveyor roller 9. The first motor 13 rotates and drives the first gear 12 to rotate, which drives the first double sprocket 11 to rotate through the second chain 20, thereby driving the first chain 15 to rotate, pushing the first sprocket 14 to rotate, and driving the conveyor roller 9 to rotate, so that the raw material passes through the inlet transition zone 1, the heating zone 2, the cooling zone 3, the cooling zone 4, and the outlet transition zone 5 in sequence. When the raw material enters the heating zone 2, the first silicon carbide heating rod 24 is activated for heating, and the heating is monitored and controlled by the thermocouple 23 and the control system. The second motor 16 is activated, which drives the second gear 18 to rotate, which in turn drives the fourth chain 21 to rotate the second double sprocket, drives the third chain 19 to rotate, drives the second sprocket 17 to rotate, and pushes the roller 10 to rotate, thereby performing flattening processing. The inlet transition zone 1 can also be equipped with roller 10 and supporting components. When the raw material enters the cooling zone 3, it is cooled down by low-temperature heating treatment through the second silicon carbide heating rod 25 and thermocouple 23. It is then conveyed to cooling zone 4, where it is cooled by air through cold air duct 8, which is connected to a cooler; finally, it is discharged through discharge pipe 7.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all changes falling within the meaning and scope of the equivalents of the claims be included within the present invention, and no reference numerals in the claims should be regarded as limiting the scope of the claims.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air roller hearth furnace for aerogel fiber blanket sintering and heat treatment, characterized in that, The kiln body comprises an inlet transition zone (1), a heating zone (2), a cooling-down zone (3), a cooling zone (4) and an outlet transition zone (5) in sequence from right to left, the inside of the kiln body is provided with a plurality of conveying rollers (9), the conveying rollers (9) are connected with a conveying drive assembly, the inside of the heating zone (2) is provided with a first heating assembly, the inside of the cooling-down zone (3) is provided with a second heating assembly, the inside of the cooling zone (4) is provided with a cooling assembly, the inside of the heating zone (2) above the conveying rollers (9) is provided with a plurality of roller bars (10), the roller bars (10) are connected with a rotating drive assembly, the right end of the kiln body is provided with a feeding pipe (6), and the left end of the kiln body is provided with a discharging pipe (7).

2. An air roller hearth furnace for sintering and heat treating aerogel fiber blanket according to claim 1, characterized in that: The conveying drive assembly comprises a first motor (13), the output shaft of the first motor (13) is provided with a first gear (12), one end of the conveying roller (9) located at the rightmost end of the kiln body is provided with a first double sprocket (11), the end portions of the remaining conveying rollers (9) located on one side of the first double sprocket (11) are connected with first sprockets (14), the first double sprocket (11) and the first sprockets (14) are jointly connected with a first chain (15), and the first gear (12) and the first double sprocket (11) are connected with a second chain (20).

3. An air roller hearth furnace for sintering and heat treating aerogel fiber blanket according to claim 1, characterized in that: The rotating drive assembly comprises a second motor (16), the output shaft of the second motor (16) is connected with a second gear (18), one end of the roller bar (10) close to the second gear (18) is provided with a second double sprocket, the end portions of the remaining roller bars (10) located on one side of the second double sprocket are connected with second sprockets (17), the second sprockets (17) and the second double sprocket are jointly connected with a third chain (19), and the second gear (18) and the second double sprocket are jointly connected with a fourth chain (21).

4. An air roller hearth furnace for sintering and heat treating aerogel fiber blanket according to claim 1, characterized in that: The first heating assembly comprises a plurality of first silicon-carbon heating rods (24), the plurality of first silicon-carbon heating rods (24) are distributed in the inside of the heating zone (2), and the top surface of the heating zone (2) is provided with a thermocouple (23).

5. An air roller hearth furnace for sintering and heat treating aerogel fiber blanket according to claim 1, characterized in that: The second heating assembly comprises a second silicon-carbon heating rod (25), the second silicon-carbon heating rod (25) is arranged in the inside of the cooling-down zone (3), and the top surface of the cooling-down zone (3) is also provided with a thermocouple (23).

6. An air roller hearth furnace for sintering and heat treating aerogel fiber blanket according to claim 1, characterized in that: The cooling assembly comprises a cold air pipe (8), and the cold air pipe (8) penetrates the top surface of the cooling zone (4).

7. An air roller hearth furnace for sintering and heat treating aerogel fiber blanket according to claim 1, characterized in that: The free end of the feeding pipe (6) is connected with a feeding hopper (22).

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