Low dielectric constant glass fiber kiln

Abstract

The utility model relates to glass fiber production technical field especially relates to a low dielectric constant glass fiber kiln. Include: heating area, drawing area, heating area is provided with heating electrode, heating material way, heating electrode sets up in heating area, heating electrode is used for melting powder material into glass liquid, the one end of heating material way away from ground is provided with the feed port for receiving powder material, heating material way sets up along vertical direction to make powder material inhabit the top of glass liquid, drawing area is linked together with the one end of heating material way close to ground to receive glass liquid. In prior art, when melting glass powder into glass liquid by E glass kiln, boron volatilization is serious, can influence the viscosity of glass liquid and lead to unstable drawing operation. Compared with prior art, the heating material way of the utility model is vertically arranged, when melting powder into glass liquid, the powder still continuously fills into the heating material way, thus, the powder with lower temperature inhabits the top of glass liquid, thereby, the boron is stored to reduce the volatilization amount.

Description

Technical Field

[0001] This utility model relates to the field of glass fiber production technology, and in particular to a glass fiber furnace with low dielectric constant. Background Technology

[0002] Low-dielectric glass fiber is a type of glass fiber with lower dielectric constant and dielectric loss. It also boasts advantages such as lower density, wider bandwidth, and higher wave transmission, making it widely used in the electronics and information industry. Low-dielectric glass fiber can be used to manufacture copper-clad laminates, printed circuit boards, electronic fiber cloths, and wave-transparent composite materials, finding broad applications in the electronics, home appliance, communications, automotive, and defense industries.

[0003] Currently, low-dielectric glass fibers are produced using the crucible drawing method, which offers good flexibility, allowing for production and shutdown at any time. However, this method suffers from low production efficiency, high platinum loss due to the high temperature, high production costs, and high investment costs. These factors are detrimental to the company's long-term operation. While the E-type glass furnace can effectively solve the aforementioned problems, its pure oxygen combustion system causes significant boron volatilization during the melting of low-dielectric glass powder into molten glass, severely affecting the viscosity of the molten glass and resulting in unstable fiber drawing operations; the product composition also fluctuates considerably. Utility Model Content

[0004] In view of the technical problems of the prior art, this utility model provides a glass fiber furnace with low dielectric constant.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A low dielectric constant glass fiber furnace includes: a heating zone and a drawing zone; the heating zone is provided with heating electrodes and a heating channel; the heating electrodes are disposed within the heating channel; the heating electrodes are used to melt powder into molten glass; the heating channel has an inlet for receiving powder at its end away from the ground; the heating channel is arranged vertically so that the powder is above the molten glass; the drawing zone is connected to the end of the heating channel near the ground to receive the molten glass.

[0007] In practical applications, the screw feeder is aligned with the inlet to feed the powder into the heating channel. Once inside, the powder is continuously heated by heating electrodes. As the temperature gradually rises, the powder eventually melts into molten glass. The molten glass flows into the drawing zone, where the drawing process can then begin. Throughout this process, the powder continues to be fed into the heating channel through the inlet. Thus, the powder remains above the molten glass. Because the powder enters the heating channel for a relatively short time and has not yet melted, its temperature is relatively low. This allows boron that would otherwise volatilize to be trapped within the powder, ensuring the boron content in the molten glass meets standards and preventing instability in the drawing process and significant fluctuations in product composition.

[0008] Furthermore, a chimney and a discharge port are also provided on the heating material channel; the chimney is located at the end of the heating material channel away from the ground; the chimney is connected to the heating material channel; the discharge port is located at the end of the heating material channel close to the ground; the discharge port is connected to the heating material channel.

[0009] Furthermore, the drawing zone is equipped with a drawing channel and a perforated brick; the drawing channel is located at the end of the heating channel near the ground; the drawing channel is connected to the heating channel to receive molten glass; the perforated brick is located on the side of the drawing channel near the ground; the perforated brick is arranged along the flow path of the molten glass.

[0010] Furthermore, the wire drawing area is also equipped with a discharge port; the discharge port is located on the side of the wire drawing channel near the ground; the discharge port is connected to the wire drawing channel.

[0011] Furthermore, the drawing zone is also equipped with a material channel heat storage unit; the material channel heat storage unit is located on the side of the drawing material channel away from the ground; there are multiple material channel heat storage units; the material channel heat storage units are arranged from one end of the drawing material channel to the other end.

[0012] Furthermore, the material channel heat storage unit includes a torch, a material channel cover brick, and a retaining brick; the torch is located on the side of the wire drawing material channel away from the ground; the material channel cover brick is located between the torch and the wire drawing material channel; and the retaining brick is located between two adjacent material channel heat storage units.

[0013] Furthermore, the drawing area is also equipped with natural gas pipelines and pure oxygen pipelines; the natural gas pipelines are connected to the material channel heat storage unit; the pure oxygen pipelines are also connected to the material channel heat storage unit.

[0014] Furthermore, it also includes an ascending feed channel; the ascending feed channel is located between the heating zone and the drawing zone; one end of the ascending feed channel is connected to the heating feed channel; the other end of the ascending feed channel is connected to the drawing zone; the ascending feed channel is inclined from the heating feed channel toward the drawing zone.

[0015] Furthermore, it also includes a PLC control unit and thermocouples; the thermocouples are installed in the heating zone and the drawing zone; the thermocouples are used to detect the temperature of the molten glass; the PLC control unit is electrically connected to the thermocouples. Attached Figure Description

[0016] Figure 1 Overall structure diagram.

[0017] Figure 2 Top view of the overall structure.

[0018] Figure 3 : Cross-sectional view of the material channel heat storage unit.

[0019] In the diagram: 1. Heating zone; 11. Heating electrode; 12. Heating channel; 121. Feed inlet; 122. Chimney; 123. Discharge port; 2. Wire drawing zone; 21. Wire drawing channel; 22. Perforated brick; 23. Channel heat storage unit; 231. Flamethrower; 232. Channel cover brick; 233. Baffle brick; 24. Natural gas pipeline; 25. Pure oxygen pipeline; 26. Discharge port; 3. Thermocouple; 4. Rising channel. Detailed Implementation

[0020] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0021] A low dielectric constant glass fiber furnace includes: a heating zone 1, a drawing zone 2, a PLC control unit, a thermocouple 3, and a rising feed channel 4. The heating zone 1 is equipped with a heating electrode 11 and a heating feed channel 12. The heating electrode 11 is used to melt the powder into molten glass. Preferably, the heating electrode 11 is a molybdenum electrode. The heating electrode 11 is disposed within the heating feed channel 12. The heating feed channel 12 is arranged vertically. The heating feed channel 12 has a feed inlet 121, a chimney 122, and a discharge port 123. The feed inlet 121 and the chimney 122 are located at the end of the heating feed channel 12 furthest from the ground and are connected to the heating feed channel 12. The discharge port 123 is located at the end of the heating feed channel 12 closest to the ground.

[0022] On the other hand, thermocouple 3 is installed inside the heating channel 12 to obtain the temperature of the molten glass after the powder has melted. The PLC control unit is electrically connected to thermocouple 3 to receive the temperature data obtained by thermocouple 3. The PLC control unit adjusts the power of the transformer connected to the heating electrode 11 based on the obtained temperature data, thereby adjusting the temperature of the molten glass inside the heating channel 12 to meet actual production needs.

[0023] The drawing zone 2 is equipped with a drawing channel 21, a perforated brick 22, a channel heat storage unit 23, a natural gas pipeline 24, a pure oxygen pipeline 25, and a discharge port 26. The drawing channel 21 is located at the ground-facing end of the heating channel 12. The drawing channel 21 is connected to the heating channel 12 to receive molten glass. The perforated brick 22 is located on the ground-facing side of the drawing channel 21. The perforated brick 22 is positioned along the flow path of the molten glass. The discharge port 26 is located on the ground-facing side of the drawing channel 21 and is connected to the drawing channel 21.

[0024] The heat storage unit 23 is located on the side of the wire drawing duct 21 away from the ground. There are multiple heat storage units 23. The heat storage units 23 are arranged from one end of the wire drawing duct 21 to the other. Specifically, the heat storage unit 23 includes a torch 231, a duct cover brick 232, and a retaining brick 233. The torch 231 is located on the side of the wire drawing duct 21 away from the ground. The duct cover brick 232 is located between the torch 231 and the wire drawing duct 21. The retaining brick 233 is located between two adjacent heat storage units 23. Thus, the torch 231 is separated into a specific area by the duct cover brick 232 and the retaining brick 233. Two torches 231 arranged opposite each other constitute a torch group, and at least two torch groups are provided within the same heat storage unit 23. Simultaneously, the natural gas pipeline 24 is connected to the torch 231. The pure oxygen pipeline 25 is connected to the torch 231.

[0025] On the other hand, thermocouples 3 are also installed in the drawing zone 2. At least two thermocouples 3 are installed in the same material channel heat storage unit 23. The sensing end of one thermocouple 3 extends into the drawing channel 21 to obtain the temperature of the molten glass within the channel. The sensing end of the other thermocouple 3 is aligned with the torch 231 to obtain the temperature of the flame emitted by the torch 231. The PLC control unit is electrically connected to the thermocouples 3 in the drawing zone 2 to obtain the corresponding molten glass temperature data and torch 231 temperature data. Based on the acquired temperature data, the PLC control unit controls the electrically controlled valves of the natural gas pipeline 24 and the pure oxygen pipeline 25, thereby controlling the oxygen-fuel ratio of the torch 231 and consequently controlling the temperature of the molten glass within the drawing channel 21.

[0026] The rising feed channel 4 is located between the heating zone 1 and the drawing zone 2. One end of the rising feed channel 4 is connected to the heating feed channel 12. The other end of the rising feed channel 4 is connected to the drawing feed channel 21. The rising feed channel 4 is inclined from the heating feed channel 12 toward the drawing feed channel 21.

[0027] In practical applications, the screw feeder is aligned with the inlet 121 of the heating channel 12. The screw feeder feeds powder into the heating channel 12 through inlet 121. Once inside the heating channel 12, the powder is continuously heated by the heating electrodes 11. As the temperature gradually rises, the heating electrodes 11 eventually melt the powder into molten glass. Because the heating channel 12 is vertically oriented, and the screw feeder continues to feed powder into it during the heating process, a layered structure is formed within the heating channel 12, with powder on top and molten glass on the bottom. Newly added powder, due to insufficient heating time, has a lower temperature compared to the molten glass. Therefore, the boron that would otherwise volatilize is sealed within the powder, ensuring that the composition of the molten glass meets production requirements.

[0028] Because the rising channel 4 is connected to the heating channel 12, the molten glass will flow into the rising channel 4. As the powder melting process continues, the level of the molten glass in the heating channel 12 will gradually rise, and the level of the molten glass in the rising channel 4 will rise accordingly. Finally, the molten glass will enter the drawing channel 21 through the rising channel 4. The rising channel 4 is inclined, so that the height of the drawing channel 21 is slightly higher than the bottom of the heating channel 12. This ensures that only the molten glass at the bottom of the heating channel 12 (i.e., the completely melted molten glass) can enter the drawing channel 21 through the rising channel 4. This effectively prevents unmelted powder from flowing into the drawing channel 21 with the molten glass, thus avoiding disruption to subsequent production processes.

[0029] When molten glass enters the drawing channel 21, it flows along the channel. Upon reaching the stencil brick 22, it passes through the stencil brick to the stencil for drawing. Simultaneously, the torch 231 of the channel heat storage unit 23 heats the molten glass to maintain its temperature. The flame of the torch 231 is isolated from the molten glass by the channel cover brick 232. The channel cover brick 232 has corresponding through holes, through which the heat generated by the torch 231 heats the molten glass. Thus, the torch 231 indirectly heats the molten glass through the channel cover brick 232, preventing excessively high flame temperatures that could cause overheating and excessive boron volatilization, leading to uneven composition of the molten glass.

[0030] Meanwhile, the material channel cover bricks 232 and baffle bricks 233 isolate the material channel heat storage units 23 from each other. This allows the PLC control unit to manage the temperature of a specific material channel heat storage unit 23, thereby controlling the state of a specific area of ​​the molten glass. This facilitates control of the molten glass's state and improves control accuracy to some extent. Simultaneously, it ensures a uniform and stable temperature within the material channel heat storage unit 23.

[0031] On the other hand, if special circumstances such as structural detachment or material replacement occur in the heating channel 12, they can be handled through the discharge port 123 or the molten glass in the heating channel 12 can be quickly discharged. Secondly, if abnormal situations such as unstable wire drawing operation occur, the molten glass in the wire drawing channel 21 can be quickly discharged through the discharge port 26.

[0032] It is worth noting that the refractory bricks in direct contact with the molten glass in the rising feed channel 4 and the drawing feed channel 21 are made of dense chrome bricks, with an outer layer of insulating bricks. The refractory bricks in direct contact with the molten glass in the heating feed channel 12 are made of high zirconium bricks, with an outer layer of insulating bricks.

[0033] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A low dielectric constant glass fiber kiln characterized by: include: Heating zone (1), wire drawing zone (2); The heating zone (1) is provided with heating electrodes (11) and heating channels (12); The heating electrode (11) is disposed inside the heating channel (12); The heating electrode (11) is used to melt the powder into molten glass; The heating channel (12) has an inlet (121) for receiving the powder at one end away from the ground. The heating channel (12) is arranged vertically so that the powder is positioned above the molten glass; The drawing zone (2) is connected to the end of the heating channel (12) near the ground to receive the molten glass.

2. A low dielectric constant glass fiber furnace as defined in claim 1, wherein: The heating channel (12) is also provided with a chimney (122) and a discharge port (123); The chimney (122) is located at the end of the heating duct (12) away from the ground; The chimney (122) is connected to the heating duct (12); The discharge port (123) is located at one end of the heating channel (12) near the ground; The discharge port (123) is connected to the heating channel (12).

3. The low dielectric constant glass fiber furnace according to claim 1, characterized in that: The wire drawing zone (2) is provided with a wire drawing channel (21) and a perforated brick (22); The wire drawing channel (21) is located at one end of the heating channel (12) near the ground; The drawing channel (21) is connected to the heating channel (12) to receive the molten glass; The perforated brick (22) is disposed on the side of the wire drawing channel (21) near the ground; The perforated brick (22) is arranged along the flow path of the molten glass.

4. A low dielectric constant glass fiber furnace according to claim 3, characterized in that: The wire drawing area (2) is also provided with a discharge port (26); The discharge port (26) is located on the side of the wire drawing channel (21) near the ground; The discharge port (26) is connected to the wire drawing channel (21).

5. A low dielectric constant glass fiber furnace according to claim 3, characterized in that: The wire drawing zone (2) is also equipped with a material channel heat storage unit (23); The heat storage unit (23) of the material channel is located on the side of the wire drawing material channel (21) away from the ground; The number of the material channel heat storage units (23) is multiple; The heat storage unit (23) of the material channel is arranged from one end of the wire drawing channel (21) to the other end.

6. A low dielectric constant glass fiber furnace according to claim 5, characterized in that: The material channel heat storage unit (23) includes a torch (231), a material channel cover brick (232), and a retaining brick (233). The flare (231) is located on the side of the wire drawing channel (21) away from the ground; The material channel cover brick (232) is disposed between the torch (231) and the wire drawing channel (21); The retaining brick (233) is disposed between two adjacent material channel heat storage units (23).

7. A low dielectric constant glass fiber furnace according to claim 5, characterized in that: The wire drawing area (2) is also equipped with a natural gas pipeline (24) and a pure oxygen pipeline (25). The natural gas pipeline (24) is connected to the material channel heat storage unit (23); The pure oxygen pipeline (25) is connected to the material channel heat storage unit (23).

8. A low dielectric constant glass fiber furnace according to any one of claims 1 to 7, characterized in that: It also includes the rising feed channel (4); The rising feed channel (4) is located between the heating zone (1) and the drawing zone (2); One end of the rising material channel (4) is connected to the heating material channel (12); The other end of the rising feed channel (4) is connected to the wire drawing zone (2); The rising feed channel (4) is inclined from the heating feed channel (12) toward the drawing zone (2).

9. A low dielectric constant glass fiber furnace according to any one of claims 1 to 7, characterized in that: It also includes a PLC control unit and thermocouples (3); The thermocouple (3) is disposed in the heating zone (1) and the wire drawing zone (2); The thermocouple (3) is used to detect the temperature of the molten glass; The PLC control unit is electrically connected to the thermocouple (3).

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