Low dielectric constant glass fiber kiln

Abstract

The invention relates to the technical field of glass fiber production, in particular to a low-dielectric-constant glass fiber kiln. Comprising a heating area and a wire drawing area, the heating area is provided with a heating electrode and a heating material channel; the heating electrode is arranged in the heating area; the heating electrode is used for melting the powder into molten glass; a feeding hole for receiving powder is formed in one end, far away from the ground, of the heating material channel; the heating material channel is arranged in the vertical direction, so that the powder is located above the molten glass; the wire drawing area is communicated with one end, close to the ground, of the heating channel to receive glass liquid. In the prior art, when an E glass kiln is adopted to melt glass powder into glass liquid, boron is seriously volatilized, the viscosity of the glass liquid can be influenced, and the wiredrawing operation is unstable. Compared with the prior art, the heating material channel is vertically arranged, and when powder is melted into molten glass, the powder is still continuously filled into the heating material channel, so that the powder with lower temperature is located above the molten glass, and boron is sealed and stored to reduce the volatilization amount.

Description

Technical Field

[0001] The invention relates to the technical field of glass fiber production, in particular to a low dielectric constant glass fiber kiln. Background Art

[0002] Low-dielectric glass fiber, a type of glass fiber, boasts lower dielectric constant and dielectric loss, along with advantages such as low density, wide bandwidth, and high wave transparency. It is widely used in the electronics and information industry. Low-dielectric glass fiber can be used to manufacture products such as copper-clad laminates, printed circuit boards, electronic fiber fabrics, and wave-transmitting composite materials. It is widely used in the electronics, home appliance, communications, automotive, and defense industries.

[0003] Currently, low-dielectric glass fiber is produced using the crucible drawing method, which offers considerable flexibility, allowing for on-and-off production at any time. However, production efficiency is low, and due to high temperatures, platinum loss is significant, resulting in high production costs and investment costs. These factors are detrimental to the company's long-term operations. While the use of E-glass furnaces can effectively address these issues, the pure oxygen combustion system used in E-glass furnaces significantly affects the viscosity of the molten glass during the melting of low-dielectric glass powder, leading to boron volatilization and unstable drawing operations. Product composition fluctuates significantly. Summary of the Invention

[0004] In view of the technical problems of the prior art, the present invention provides a low dielectric constant glass fiber kiln.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A low dielectric constant glass fiber kiln comprises: a heating zone and a drawing zone; the heating zone is provided with a heating electrode and a heating channel; the heating electrode is arranged in the heating channel; the heating electrode is used to melt powder into molten glass; a feed port for receiving powder is provided at one end of the heating channel away from the ground; the heating channel is arranged in a vertical direction so that the powder is located above the molten glass; the drawing zone is connected to the end of the heating channel close to the ground to receive the molten glass.

[0007] In actual application, a screw feeder is aligned with the feed port, allowing powder to be fed into the heating channel through the feed port. Once in the channel, the powder is continuously heated by the heating electrodes. As the temperature gradually rises, the powder eventually melts into molten glass. The molten glass then flows into the drawing area, where the drawing process can begin. During this process, the powder continues to be fed into the heating channel through the feed port. This keeps the powder above the molten glass. Because the powder has only recently entered the channel and has not yet melted, its temperature is relatively low. This traps the boron that would otherwise evaporate, ensuring that the boron content in the molten glass meets the required standards. This prevents unstable drawing operations and large fluctuations in product composition.

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

[0009] Furthermore, the wire drawing area is provided with a wire drawing channel and drain bricks; the wire drawing channel is provided at one end of the heating channel close to the ground; the wire drawing channel is connected to the heating channel to receive the glass liquid; the drain bricks are provided on one side of the wire drawing channel close to the ground; the drain bricks are provided along the flow path of the glass liquid.

[0010] Furthermore, the wire drawing area is also provided with a discharge port; the discharge port is arranged on a side of the wire drawing channel close to the ground; and the discharge port is connected to the wire drawing channel.

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

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

[0013] Furthermore, the wire drawing area is also provided with a natural gas pipeline and a pure oxygen pipeline; the natural gas pipeline is connected to the material channel heat storage unit; and the pure oxygen pipeline is connected to the material channel heat storage unit.

[0014] Furthermore, it also includes a rising channel; the rising channel is arranged between the heating zone and the drawing zone; one end of the rising channel is connected to the heating channel; the other end of the rising channel is connected to the drawing zone; the rising channel is inclined from the heating channel to the drawing zone.

[0015] Furthermore, it also includes a PLC control unit and a thermocouple; the thermocouple is arranged in the heating area and the drawing area; the thermocouple is used to detect the temperature of the glass liquid; the PLC control unit is electrically connected to the thermocouple. BRIEF DESCRIPTION OF THE DRAWINGS

[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 structure.

[0019] In the figure: 1. Heating zone; 11. Heating electrode; 12. Heating channel; 121. Feed port; 122. Chimney; 123. Discharge port; 2. Wire drawing zone; 21. Wire drawing channel; 22. Leakage brick; 23. Channel heat storage unit; 231. Gun; 232. Channel cover brick; 233. Brick retaining wall; 24. Natural gas pipeline; 25. Pure oxygen pipeline; 26. Discharge port; 3. Thermocouple; 4. Rising channel. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0021] A low dielectric constant glass fiber kiln comprises: a heating zone 1, a drawing zone 2, a PLC control unit, a thermocouple 3, and an ascending channel 4. The heating zone 1 is provided with a heating electrode 11 and a heating 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 arranged in the heating channel 12. The heating channel 12 is arranged in a vertical direction. A feed port 121, a chimney 122, and a discharge port 123 are provided on the heating channel 12. The feed port 121 and the chimney 122 are provided at the end of the heating channel 12 away from the ground and are connected to the heating channel 12. The discharge port 123 is provided at the end of the heating channel 12 close to the ground.

[0022] Meanwhile, a thermocouple 3 is installed within the heating channel 12 to measure the temperature of the molten glass after the powder is melted. A PLC control unit is electrically connected to the thermocouple 3 to receive the temperature data obtained by the thermocouple 3. Based on the obtained temperature data, the PLC control unit adjusts the power of the transformer connected to the heating electrode 11, thereby adjusting the temperature of the molten glass within the heating channel 12 to meet actual production requirements.

[0023] The wire drawing area 2 is provided with a wire drawing channel 21, a leaking plate brick 22, a channel heat storage unit 23, a natural gas pipeline 24, a pure oxygen pipeline 25, and a discharge port 26. The wire drawing channel 21 is provided at the end of the heating channel 12 close to the ground. The wire drawing channel 21 is connected to the heating channel 12 to receive the molten glass. The leaking plate brick 22 is provided on the side of the wire drawing channel 21 close to the ground. The leaking plate brick 22 is provided along the flow path of the molten glass. The discharge port 26 is provided on the side of the wire drawing channel 21 close to the ground. The discharge port 26 is connected to the wire drawing channel 21.

[0024] The material channel heat storage unit 23 is arranged on the side of the wire drawing material channel 21 away from the ground. There are multiple material channel heat storage units 23. The material channel heat storage units 23 are arranged from one end of the wire drawing material channel 21 to the other end. Specifically, the material channel heat storage unit 23 includes a blast gun 231, a material channel cover brick 232, and a retaining brick 233. The blast gun 231 is arranged on the side of the wire drawing material channel 21 away from the ground. The material channel cover brick 232 is arranged between the blast gun 231 and the wire drawing material channel 21. The retaining brick 233 is arranged between two adjacent material channel heat storage units 23. Thus, the blast guns 231 are separated into a specific area by the material channel cover brick 232 and the retaining brick 233. Among them, the two blast guns 231 arranged opposite to each other constitute a blast gun group, and at least two blast gun groups are arranged in the same material channel heat storage unit 23. At the same time, the natural gas pipeline 24 is connected to the blast gun 231. The pure oxygen pipeline 25 is connected to the blast gun 231.

[0025] On the other hand, the thermocouple 3 is also arranged in the drawing area 2. In the same material channel heat storage unit 23, at least two thermocouples 3 are arranged. The detection end of one of the thermocouples 3 extends into the drawing material channel 21 to obtain the temperature of the glass liquid in the drawing material channel 21. The detection end of the other thermocouple 3 is aimed at the lance 231 to obtain the temperature of the flame ejected by the lance 231. The PLC control unit is electrically connected to the thermocouple 3 in the drawing area 2 to obtain the corresponding glass liquid temperature data and the temperature data of the lance 231. The PLC control unit controls the electrically controlled valves of the natural gas pipeline 24 and the pure oxygen pipeline 25 based on the obtained temperature data, thereby controlling the oxygen-fuel ratio of the lance 231, and further controlling the glass liquid temperature in the drawing material channel 21.

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

[0027] In actual application, the screw feeder is aligned with the feed port 121 of the heating channel 12. The powder is fed into the heating channel 12 through the feed port 121 by the screw feeder. After the powder enters the heating channel 12, it will be continuously heated by the heating electrode 11. As the temperature gradually rises, the heating electrode 11 will eventually melt the powder into molten glass. Because the heating channel 12 is vertically arranged and the screw feeder continues to feed powder into the heating channel 12 during the heating process, a layered structure with powder on the upper layer and molten glass on the lower layer is formed in the heating channel 12. The newly added powder has a lower temperature than the molten glass due to insufficient heating time. As a result, the originally volatilized boron will be sealed by the powder, so that the composition of the molten glass can meet production requirements.

[0028] Since 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. Eventually, the molten glass will enter the drawing channel 21 through the rising channel 4. Among them, the rising channel 4 is tilted so that the height of the drawing channel 21 is slightly higher than the bottom end of the heating channel 12. This means that only the molten glass at the bottom of the heating channel 12 (i.e., completely melted molten glass) can enter the drawing channel 21 through the rising channel 4. In this way, it can effectively prevent the unmelted powder from flowing into the drawing channel 21 with the molten glass, affecting the subsequent production process.

[0029] After the glass liquid enters the drawing channel 21, it will flow along the drawing channel 21. When it flows to the drain plate brick 22, it will pass through the drain plate brick 22 to the drain plate for drawing. At the same time, the lance 231 of the channel heat storage unit 23 will heat the glass liquid to maintain the temperature of the glass liquid. Among them, the flame of the lance 231 is isolated from the glass liquid by the channel cover brick 232. The channel cover brick 232 is provided with corresponding through holes, and the heat generated by the lance 231 heats the glass liquid through the through holes on the channel cover brick 232. In this way, the lance 231 indirectly heats the glass liquid through the channel cover brick 232, thereby preventing the flame temperature generated by the lance 231 from being too high, causing the glass liquid to be overheated and then causing excessive volatilization of boron, resulting in uneven composition of the glass liquid.

[0030] Furthermore, the isolation provided by the manifold cover bricks 232 and the barrier bricks 233 renders the manifold thermal storage units 23 independent of one another. This facilitates the PLC control unit to control the temperature of a particular manifold thermal storage unit 23, and thus the state of a specific area of the molten glass. This not only facilitates control of the molten glass state, but also improves control accuracy to a certain extent. Furthermore, the spatial temperature within the manifold thermal storage units 23 remains uniform and stable.

[0031] On the other hand, if there are special circumstances such as structural detachment or material replacement in the heating channel 12, the glass liquid in the heating channel 12 can be quickly discharged through the discharge port 123. Secondly, if there are abnormal circumstances such as unstable drawing operation, the glass liquid in the 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 ascending channel 4 and the drawing channel 21 are dense chrome bricks, with an outer layer of insulation bricks. The refractory bricks in direct contact with the molten glass in the heating channel 12 are high zirconium bricks, with an outer layer of insulation bricks.

[0033] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A low dielectric constant glass fiber kiln, characterized by: include: Heating zone (1), drawing zone (2); The heating zone (1) is provided with a heating electrode (11) and a heating channel (12); The heating electrode (11) is arranged in the heating channel (12); The heating electrode (11) is used to melt the powder into glass liquid; The heating channel (12) is provided with a feed port (121) for receiving the powder at one end away from the ground; The heating channel (12) is arranged in a vertical direction so that the powder is located above the glass liquid; The drawing area (2) is connected to an end of the heating channel (12) close to the ground to receive the glass liquid.

2. The low dielectric constant glass fiber kiln according to claim 1, characterized in that: The heating channel (12) is also provided with a chimney (122) and a discharge port (123); The chimney (122) is opened at an end of the heating channel (12) away from the ground; The chimney (122) is in communication with the heating channel (12); The discharge port (123) is opened at one end of the heating channel (12) close to the ground; The discharge port (123) is communicated with the heating channel (12).

3. The low dielectric constant glass fiber kiln according to claim 1, characterized in that: The wire drawing area (2) is provided with a wire drawing channel (21) and drain bricks (22); The wire drawing channel (21) is arranged at one end of the heating channel (12) close to the ground; The drawing channel (21) is connected to the heating channel (12) to receive the glass liquid; The drain brick (22) is arranged on a side of the wire drawing channel (21) close to the ground; The drain bricks (22) are arranged along the flow path of the glass liquid.

4. The low dielectric constant glass fiber kiln 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 arranged on a side of the wire drawing channel (21) close to the ground; The discharge port (26) is communicated with the wire drawing channel (21).

5. The low dielectric constant glass fiber kiln according to claim 3, characterized in that: The wire drawing area (2) is further provided with a channel heat storage unit (23); The material channel heat storage unit (23) is arranged on a 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 material channel heat storage unit (23) is arranged from one end to the other end of the wire drawing material channel (21).

6. The low dielectric constant glass fiber kiln according to claim 5, characterized in that: The material channel heat storage unit (23) includes a blast gun (231), a material channel cover brick (232), and a retaining brick (233); The lance (231) is arranged on a side of the wire drawing channel (21) away from the ground; The material channel cover brick (232) is arranged between the blasting gun (231) and the wire drawing material channel (21); The blocking brick (233) is arranged between two adjacent material channel heat storage units (23).

7. The low dielectric constant glass fiber kiln according to claim 5, characterized in that: The drawing area (2) is also provided 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 channel heat storage unit (23).

8. The low dielectric constant glass fiber kiln according to any one of claims 1 to 8, characterized in that: Also includes an ascending channel (4); The ascending channel (4) is arranged between the heating zone (1) and the wire drawing zone (2); One end of the ascending channel (4) is connected to the heating channel (12); The other end of the ascending channel (4) is connected to the wire drawing area (2); The ascending channel (4) is arranged to be inclined from the heating channel (12) toward the drawing zone (2).

9. The low dielectric constant glass fiber kiln according to any one of claims 1 to 8, characterized in that: It also includes a PLC control unit and a thermocouple (3); The thermocouple (3) is arranged in the heating zone (1) and the wire drawing zone (2); The thermocouple (3) is used to detect the temperature of the glass liquid; The PLC control unit is electrically connected to the thermocouple (3).

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