Airflow adjusting device, multi-core burner thereof and quartz glass manufacturing method

Abstract

The invention discloses an airflow adjusting device, a multi-core combustor thereof and a quartz glass manufacturing method, and belongs to the technical field of combustor structural design, the airflow adjusting device is additionally arranged at the airflow output end of the multi-core combustor, and the airflow adjusting device comprises a flow guide structure and an annular wing-shaped structure which are integrally formed; the flow guide structure is used for dredging airflow, reducing the airflow jet rotation effect and improving the gas flow speed, and the effects of increasing the flame length and reducing the temperature of a burner opening are achieved. The annular wing-shaped structure is used for guiding airflow to gather towards the central axis, flame rigidity and stability are enhanced so as to further increase flame length, and the temperature of a reaction area is increased to promote rapid reaction and deposition of materials. By optimizing the airflow motion state, on the premise that a core combustion system of the combustor is not changed, flame length increase, burner cooling and reaction efficiency improvement are synchronously achieved, and the combustion process effect in quartz glass manufacturing can be remarkably optimized.

Description

Technical Field

[0001] This invention relates to the field of burner structure design technology, and in particular to an airflow regulating device, its multi-core burner, and a method for manufacturing quartz glass. Background Technology

[0002] In the quartz glass manufacturing process, the multi-core burner is one of the core pieces of equipment, and its flame performance directly affects the material reaction and deposition efficiency and product quality. In existing technologies, during operation, the gas in the multi-core burner is prone to collision and rotational turbulence in the chamber, resulting in poor airflow and insufficient flame length. At the same time, the heat generated by combustion tends to accumulate at the burner inlet, causing the burner temperature to be too high. This not only accelerates the aging of burner components and shortens their service life, but may also affect the stability of surrounding materials and reduce the forming quality of quartz glass products.

[0003] To address the aforementioned issues, a simple and effective technical solution is urgently needed to achieve synergistic optimization of increasing flame length and reducing burner inlet temperature, while simultaneously improving flame stability and reaction efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide an airflow regulating device, a multi-core burner, and a method for manufacturing quartz glass. By adding an airflow regulating device, the problems of insufficient flame length, burner overheating, and poor flame stability are solved simultaneously, thus adapting to the process requirements of multi-core burners for quartz glass manufacturing.

[0005] To achieve the above objectives, the present invention provides the following solution: An airflow regulating device includes a flow guiding structure for being disposed at the airflow output end of a burner and an annular airfoil structure disposed on the flow guiding structure. The flow guiding structure has at least two through-holes. The axes of the flow guiding holes are parallel to the central axis of the burner or intersect the axes of the flow guiding holes at the same point, and the point is located on the central axis of the burner.

[0006] Preferably, the flow guiding structure is a plate-shaped structure with a circular cross-section, and the flow guiding holes are evenly distributed in at least two rings around the center of the cross-section of the flow guiding structure.

[0007] Preferably, the annular airfoil structure includes at least two coaxially arranged annular members, the outer wall of the annular members is an airfoil surface, and the central axis of the annular members coincides with the central axis of the flow guide structure.

[0008] Preferably, the annular component is connected to the end face of the flow guiding structure via a connecting rod.

[0009] Preferably, the radius of curvature of the airfoil surface of the annular component gradually decreases along the airflow direction, and the angle between the surface and the central axis is 5° to 15°.

[0010] Preferably, both the flow guiding structure and the annular airfoil structure are made of high-temperature resistant materials with a high-temperature resistance temperature of not less than 1200℃.

[0011] A multi-core burner includes a multi-core burner body, a flow guide structure and an annular airfoil structure disposed at the airflow output end of the multi-core burner body, wherein the top of the annular airfoil structure is lower than the top of the wick tube of the multi-core burner body.

[0012] Preferably, the number and position of the flow guide holes are matched with the number of the lamp wick tubes, and the lamp wick tubes pass through the flow guide holes and extend out of the top of the annular airfoil structure.

[0013] Preferably, the diameter of the guide hole is larger than the diameter of the lamp wick tube and is used for the lamp wick tube to pass through.

[0014] A quartz glass manufacturing process includes the following steps: using the multi-core burner to carry out a combustion reaction to obtain quartz glass.

[0015] The present invention achieves the following technical effects compared to the prior art: This invention adds an airflow regulating device to the airflow output end of a multi-core burner. The airflow regulating device includes an integrally formed multi-hole guide structure and an annular airfoil structure. The multi-hole guide structure is used to guide the airflow, reduce the airflow jet rotation effect, and increase the gas velocity, thereby increasing the flame length and reducing the burner inlet temperature. The annular airfoil structure guides the airflow towards the central axis, enhancing flame rigidity and stability to further increase the flame length and raising the reaction zone temperature to promote rapid material reaction and deposition. By optimizing the airflow motion, this invention simultaneously achieves flame length increase, burner cooling, and reaction efficiency improvement without altering the core combustion system of the burner, significantly optimizing the combustion process in quartz glass manufacturing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an outlet view of the airflow regulating device of the present invention; Figure 2 This is a side sectional view of the airflow regulating device of the present invention; Figure 3 This is a schematic diagram of the multi-core burner assembly of the present invention; Figure 4This is a view of the outlet of the multi-core burner of the present invention; Among them, 1. airflow guiding structure; 2. annular airfoil structure; 3. airflow guiding hole; 4. multi-core burner body; 5. lamp wick tube; 6. airflow regulating device. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0019] The purpose of this invention is to provide an airflow regulating device, a multi-core burner, and a method for manufacturing quartz glass. By adding an airflow regulating device, the problems of insufficient flame length, burner overheating, and poor flame stability are solved simultaneously, thus adapting to the process requirements of multi-core burners for quartz glass manufacturing.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] refer to Figures 1 to 3 An airflow regulating device includes a flow guiding structure 1 disposed at the airflow output end of a burner and an annular airfoil structure 2 disposed on the flow guiding structure 1. The flow guiding structure 1 has through-holes 3, the axes of which are either parallel to the central axis of the burner or intersect at the same point located on the central axis of the burner. When airflow is ejected from the multi-core burner body, it is diverted and guided by the flow guiding holes 3, effectively breaking the rotational inertia of the airflow, reducing turbulence, and ensuring stable airflow output in a straight direction, thereby extending the flame length. Simultaneously, the flow-limiting effect of the flow guiding holes 3 increases the gas velocity. According to fluid mechanics principles, high-speed airflow can quickly remove the accumulated heat at the inlet of the multi-core burner body, achieving multi-core burner... The invention effectively reduces the temperature at the inlet of the multi-core burner. The airflow, guided by the flow guide structure 1 and the airfoil surface of the annular airfoil structure 2, converges towards the central axis of the multi-core burner body. This enhances the rigidity of the flame, prevents flame dispersion, and further extends the flame length. Furthermore, it concentrates the combustion reaction zone, increasing the reaction zone temperature and promoting rapid reaction and deposition of materials during quartz glass manufacturing. The converged airflow also prevents heat accumulation at the inlet of the multi-core burner, ensuring the burner temperature remains within a reasonable range. The invention optimizes the airflow state through the airflow regulating device 6, achieving increased flame length, reduced burner inlet temperature, and increased reaction zone temperature, significantly improving material reaction and deposition efficiency and enhancing the quality of quartz glass products.

[0022] Furthermore, when the axes of the guide holes 3 are all parallel to the central axis of the burner, they converge on the central axis of the multi-core burner body by relying on the airfoil curvature of the annular airfoil structure 2; when the axes of the guide holes 3 intersect at the same point, and this point is located on the central axis of the burner, the purpose is to make the guide holes 3 themselves form a converging effect, so that the combustion-supporting gas in the burner forms a converging effect through the gap between the inner wall of the guide holes 3 and the outer wall of the wick tube 5.

[0023] Furthermore, the airflow output port of the flow guide structure 1 and the multi-core burner body 4 can be detachably connected by bolts or fixedly connected by welding, which facilitates installation, maintenance and upgrading of existing equipment.

[0024] Furthermore, the flow guiding structure 1 is a plate-shaped structure with a circular cross-section, and the flow guiding holes 3 are evenly distributed in at least two rings around the center of the cross-section of the flow guiding structure 1.

[0025] refer to Figure 3 The annular airfoil structure 2 includes at least two coaxially arranged annular components. The outer wall of the annular components is an airfoil surface, and the central axis of the annular components coincides with the central axis of the flow guiding structure 1.

[0026] refer to Figure 3 The annular component is connected to the end face of the flow guiding structure 1 via a connecting rod.

[0027] Furthermore, the radius of curvature of the airfoil surface of the annular component gradually decreases along the airflow direction, and the angle between the surface and the central axis is 5° to 15°; this structural design can guide the airflow to converge smoothly, avoid secondary turbulence, and ensure the stability of the flame.

[0028] Furthermore, both the flow guide structure 1 and the annular airfoil structure 2 are made of high-temperature resistant materials with a temperature resistance of not less than 1200℃; they can withstand the high-temperature erosion of the combustion environment and extend their service life.

[0029] A multi-core burner includes a multi-core burner body 4 and a flow guide structure 1 and an annular airfoil structure 2 disposed at the airflow output end of the multi-core burner body 4, wherein the top of the annular airfoil structure 2 is lower than the top of the wick tube 5 of the multi-core burner body 4.

[0030] refer to Figure 3 The number and position of the flow guide hole 3 and the lamp wick tube 5 are matched. The lamp wick tube 5 passes through the flow guide hole 3 and extends out of the top of the annular airfoil structure 2.

[0031] refer to Figures 3 to 4 The multi-core burner body 4 has air inlets on its side walls and bottom.

[0032] Furthermore, the diameter of the guide hole 3 is larger than the diameter of the multi-core burner wick tube 5, facilitating the passage of the wick tube 5 through the guide hole 3. The diameter of the guide hole 3 can be adjusted according to the gas flow rate and pressure parameters of the multi-core burner body 4 to ensure the guiding effect and airflow stability.

[0033] A quartz glass manufacturing process includes the following steps: using a multi-core burner to carry out a combustion reaction to obtain quartz glass.

[0034] The specific method is as follows: The airflow regulating device 6 is fixed to the airflow output end of the multi-core burner body with bolts, and the sealing treatment ensures that there is no airflow leakage. After the multi-core burner body is started, the airflow is guided by the guide hole 3, the rotation turbulence is significantly reduced, the flow velocity is increased by 30% compared with the original, and the burner inlet temperature drops from 1000℃ to 850℃; guided by the annular airfoil structure 2, the airflow converges towards the central axis, the flame rigidity is enhanced, the flame length is extended from the original 30cm to 45cm, the reaction zone temperature is increased to 2200℃, the material reaction and deposition efficiency is increased by 40%, and the forming accuracy of quartz glass products is significantly improved.

[0035] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An airflow regulating device, characterized in that, It includes a flow guide structure for being disposed at the airflow output end of the burner and an annular airfoil structure disposed on the flow guide structure. The flow guide structure has at least two through-holes. The axis of each flow guide hole is parallel to the central axis of the burner or the axis of the flow guide hole intersects the same point, and the point is located on the central axis of the burner.

2. The airflow regulating device according to claim 1, characterized in that, The flow guiding structure is a plate-shaped structure with a circular cross-section, and the flow guiding holes are evenly distributed in at least two rings around the center of the cross-section of the flow guiding structure.

3. The airflow regulating device according to claim 2, characterized in that, The annular airfoil structure includes at least two coaxially arranged annular components, the outer wall of the annular components is an airfoil surface, and the central axis of the annular components coincides with the central axis of the flow guide structure.

4. The airflow regulating device according to claim 3, characterized in that, The annular component is connected to the end face of the flow guiding structure via a connecting rod.

5. The airflow regulating device according to claim 3, characterized in that, The radius of curvature of the airfoil surface of the annular component gradually decreases along the airflow direction, and the angle between the surface and the central axis is 5° to 15°.

6. The airflow regulating device according to claim 1, characterized in that, Both the flow guiding structure and the annular airfoil structure are made of high-temperature resistant materials with a high-temperature resistance of not less than 1200℃.

7. A multi-core burner, characterized in that, The airflow regulating device according to any one of claims 1 to 6 includes a multi-core burner body and a guide structure and an annular airfoil structure disposed at the airflow output end of the multi-core burner body, wherein the top of the annular airfoil structure is lower than the top of the wick tube of the multi-core burner body.

8. The multi-core burner according to claim 7, characterized in that, The number and position of the flow guide holes are matched with those of the lamp wick tubes, and the lamp wick tubes pass through the flow guide holes and extend out of the top of the annular airfoil structure.

9. The multi-core burner according to claim 8, characterized in that, The diameter of the guide hole is larger than the diameter of the lamp wick tube and is used for the passage of the lamp wick tube.

10. A quartz glass manufacturing process, characterized in that, The application of the multi-core burner according to any one of claims 7-9 includes the following steps: using the multi-core burner to carry out a combustion reaction to obtain quartz glass.

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