Oxyhydrogen combustion structure for stabilizing glass kiln and working method of oxyhydrogen combustion structure

Abstract

The invention discloses an oxyhydrogen combustion structure for stabilizing a glass kiln and a working method of the oxyhydrogen combustion structure, and belongs to the technical field of glass manufacturing. The structure comprises a brick main body, a natural gas pipeline is arranged in the middle of the brick material main body, and the natural gas pipeline and the brick material main body are coaxially arranged; a plurality of pure oxygen pipelines are circumferentially arranged on the natural gas pipeline; the pure oxygen pipelines are arranged around the natural gas pipeline in a spiral structure. According to the oxyhydrogen combustion structure, the flame of the structure can be ensured to reduce the air flow flying problem through a more stable state. Therefore, the flying flame is prevented from ablating the refractory material at the upper part of the glass kiln. Therefore, the service life and the erosion resistance of the glass kiln are improved. Flowing flames can be prevented from influencing and damaging the circulation environment of a hot airflow field in the kiln, and it is guaranteed that the good temperature distribution environment in the space of the kiln does not change greatly.

Description

Technical Field

[0001] The invention belongs to the technical field of glass manufacturing and relates to a hydrogen-oxygen combustion structure for a glass furnace and a working method thereof. Background Art

[0002] The full oxygen combustion technology of glass melting furnace has a series of advantages such as energy saving and emission reduction, environmental protection, and improved glass quality and output. However, the flame atmosphere also brings some adverse effects to refractory materials. With the strengthening of flame radiation, the amount of combustion-supporting gas decreases, the concentration of water vapor and alkaline vapor increases accordingly, the viscosity of glass liquid decreases, the temperature increases, and the erosion of refractory materials increases, which is manifested in the following points.

[0003] (1) The water vapor concentration produced by full oxygen combustion is about 3.5 times higher than that produced by air combustion. A large amount of water vapor reacts with the surface of the glass liquid to produce a large amount of volatile hydroxides escaping from the liquid surface. The highly alkaline NaOH or Na2O will react with the acidic silica bricks to cause serious corrosion of the silicon-containing refractory materials.

[0004] (2) The atmosphere in the all-oxygen combustion glass melting furnace changes greatly, and the concentration of alkaline steam NaOH increases several times, causing the erosion of the silica bricks on the kiln roof to intensify, and the chemical reaction that corrodes the surface of the refractory material.

[0005] (3) The inner surface temperature of the kiln roof is 25 to 50°C lower than that of air-assisted combustion, but the air flow velocity impulse is large, which aggravates the erosion of the silica bricks on the kiln roof.

[0006] In summary, the current full oxygen combustion technology of glass melting furnaces has the problem of air flow drifting. The drifting flame burns the refractory materials on the upper part of the glass furnace, thus affecting the service life of the glass furnace; and the drifting flame will destroy the circulation environment of the hot air flow field inside the furnace, affecting the stable operation of the glass furnace. Summary of the invention

[0007] The purpose of the present invention is to provide a stable hydrogen-oxygen combustion structure and a working method for a glass kiln, so as to solve the technical problem in the prior art that the flame drifts and burns the upper refractory material of the glass kiln, and also destroys the circulation environment of the hot air flow field inside the kiln, thereby affecting the service life of the glass kiln.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions: In the first aspect, the present invention provides a hydrogen-oxygen combustion structure for a glass furnace, comprising a brick main body; a natural gas pipeline is opened in the middle of the brick main body, and the natural gas pipeline is coaxially arranged with the brick main body; a plurality of pure oxygen pipelines are arranged circumferentially of the natural gas pipeline; the plurality of pure oxygen pipelines are arranged in a spiral structure around the natural gas pipeline.

[0009] Furthermore, the angles between the inlet direction and the outlet direction of the plurality of pure oxygen pipelines and the natural gas pipeline are both ≥90°.

[0010] Furthermore, the plurality of pure oxygen pipelines are distributed in a trend of being retracted toward the natural gas pipeline from the inlet to the outlet.

[0011] Furthermore, the plurality of pure oxygen pipelines are distributed in an equidistant array along the circumference of the natural gas pipeline.

[0012] Furthermore, the plurality of pure oxygen pipelines include a first pure oxygen pipeline, a second pure oxygen pipeline, a third pure oxygen pipeline and a fourth pure oxygen pipeline; the inlet position of the first pure oxygen pipeline corresponds to the outlet position of the fourth pure oxygen pipeline; the inlet position of the second pure oxygen pipeline corresponds to the outlet position of the first pure oxygen pipeline; the inlet position of the third pure oxygen pipeline corresponds to the outlet position of the second pure oxygen pipeline; the inlet position of the fourth pure oxygen pipeline corresponds to the outlet position of the third pure oxygen pipeline.

[0013] Furthermore, the first pure oxygen pipeline, the second pure oxygen pipeline, the third pure oxygen pipeline and the fourth pure oxygen pipeline are all cylindrical pipeline structures.

[0014] Furthermore, the natural gas pipeline is a cylindrical pipeline structure.

[0015] Furthermore, the brick body is a rectangular parallelepiped structure.

[0016] In a second aspect, the present invention provides a working method of the above-mentioned hydrogen-oxygen combustion structure for a stable glass furnace, comprising the following steps: The pure oxygen ejected from several pure oxygen pipelines is in the form of a spiral airflow, and the natural gas ejected from the natural gas pipeline is wrapped in the spiral airflow-shaped oxygen. The natural gas flow is stable and is fully mixed with the pure oxygen for combustion.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a stable hydrogen-oxygen combustion structure for a glass kiln and a working method thereof. A plurality of pure oxygen pipelines around a natural gas pipeline are arranged in a spiral structure, so that after the pure oxygen is ejected from the spiral pipeline, it can also continuously provide a spiral airflow around the natural gas ejected in the same manner, so that the airflow always wraps the natural gas, thereby ensuring that the natural gas is effectively mixed with the pure oxygen to the maximum extent, and that all gases to the maximum extent undergo a combustion chemical reaction. Only in this way can it be ensured that the combustion brings the most effective and maximum thermal energy, so as to provide a continuous and continuous high heat and high temperature to the glass kiln. In addition, the spiral airflow can ensure that all gases undergo a full combustion chemical reaction. Therefore, the least amount of unreacted waste gas will be generated, thereby generating less waste gas for the glass kiln. It has a good stabilizing effect on the operation of the glass kiln. In addition, the pure oxygen airflow surrounding the spiral makes the state of the natural gas ejected outside the structure more stable, and there is no unstable airflow, thereby ensuring the stable process state of the airflow pressure, flow rate, etc. of the natural gas and pure oxygen entering the structure. Therefore, the hydrogen-oxygen combustion structure of the present invention can ensure that the flame of the structure reduces the problem of airflow floating through a more stable state. Thereby avoiding the floating flame from burning the refractory material on the upper part of the glass kiln. This will increase the service life and corrosion resistance of the glass kiln. It can also prevent the floating flame from affecting the circulation environment of the hot air flow field inside the kiln, and ensure that the good temperature distribution environment inside the kiln space does not change significantly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a three-dimensional cross-sectional view of the combustion structure of the original glass kiln; Figure 2 It is a three-dimensional cross-sectional view of the combustion structure of the present invention in a spiral structure; Figure 3 It is a front view of the combustion structure of the present invention in a spiral structure; Figure 4 It is a rear view of the combustion structure of the present invention with a spiral structure.

[0020] Among them: 1- natural gas pipeline; 2- the first pure oxygen pipeline; 3- the second pure oxygen pipeline; 4- the third pure oxygen pipeline; 5- the fourth pure oxygen pipeline; 6- brick body; 7- the original horizontal state pure oxygen pipeline. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0025] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings: See also Figure 2The present invention discloses a hydrogen-oxygen combustion structure for a glass furnace, comprising a brick body 6; a natural gas pipeline 1 is opened in the middle of the brick body 6, and the natural gas pipeline 1 is coaxially arranged with the brick body 6; a plurality of pure oxygen pipelines are arranged circumferentially of the natural gas pipeline 1; the plurality of pure oxygen pipelines are arranged in a spiral structure around the natural gas pipeline 1.

[0028] In a feasible embodiment of the present invention, the angles between the inlet and outlet directions of the plurality of pure oxygen pipelines and the natural gas pipeline 1 are both ≥90°, and the pure oxygen pipelines are distributed in a trend of being retracted toward the natural gas pipeline 1 from the inlet to the outlet. Figure 3 and Figure 4 , the pure oxygen pipeline in the spiral state at the inlet area is farther away from the natural gas pipeline 1 in the center than the pure oxygen pipeline in the spiral state at the outlet. That is to say, the pure oxygen pipeline in the spiral state at the outlet is farther away from the natural gas pipeline 1 in the center. This means that the pure oxygen pipeline 3 is not only in a spiral state, but also in a spiral structure with an inner taper approaching the natural gas pipeline 1 in the center.

[0029] In a possible embodiment of the present invention, see Figure 3 and Figure 4 The plurality of pure oxygen pipelines include a first pure oxygen pipeline 2, a second pure oxygen pipeline 3, a third pure oxygen pipeline 4 and a fourth pure oxygen pipeline 5; the inlet position of the first pure oxygen pipeline 2 corresponds to the outlet position of the fourth pure oxygen pipeline 5; the inlet position of the second pure oxygen pipeline 3 corresponds to the outlet position of the first pure oxygen pipeline 2; the inlet position of the third pure oxygen pipeline 4 corresponds to the outlet position of the second pure oxygen pipeline 3; the inlet position of the fourth pure oxygen pipeline 5 corresponds to the outlet position of the third pure oxygen pipeline 4.

[0030] In a feasible embodiment of the present invention, the brick body 6 is a rectangular parallelepiped structure, the natural gas pipeline 1 and the plurality of pure oxygen pipelines are cylindrical pipeline structures, and the plurality of pure oxygen pipelines are distributed in an equidistant array along the circumference of the natural gas pipeline 1 .

[0031] The embodiment of the present invention discloses a working method of the above-mentioned hydrogen-oxygen combustion structure for a glass furnace, comprising the following steps: The pure oxygen ejected from the plurality of pure oxygen pipelines is in the form of a spiral flow, and the natural gas ejected from the natural gas pipeline 1 is wrapped in the spiral flow of oxygen. The natural gas flow is stable and is fully mixed and burned with the pure oxygen.

[0032] The working principle of the present invention is as follows: A glass kiln refers to a kiln used to produce ultra-thin sheet glass for electronic display devices. A kiln used to manufacture glass liquid by melting, homogenizing and clarifying glass powder. The hydrogen-oxygen combustion structure of the present invention refers to a structure that injects combustible gas and causes a combustion reaction to cause it to eject a large amount of high-temperature heat and gas, and this equipment is installed in the reserved holes on the breast walls on both sides of the kiln. This structure includes a cylindrical natural gas pipeline 1 located in the middle of the brick material for continuously supplying natural gas. And cylindrical pipes for continuously supplying pure oxygen are distributed in a circular array around the cylindrical natural gas pipeline 1 for continuously supplying natural gas. The four circular pipes for pure oxygen distributed in a circular array are extended and expanded in a spiral manner, and the inlet and outlet are at an angle of 90 degrees or more in the coaxial direction. And from the inlet to the outlet, it also presents a coaxial inward distribution.

[0033] In the existing kiln combustion system structural design, only four small circular pipes for pure oxygen are arranged around the center of the circular pipe for natural gas, and the four small circular pipes are horizontally symmetrically distributed. Figure 1 As shown. Without any structural optimization, only pure oxygen can be provided around the natural gas when it is ejected from the structural pipeline to continuously ensure the hydrogen-oxygen mixed combustion. The present invention is an optimization of the structure on this basis. In the process of ensuring full combustion, the efficiency of the combustion chemical reaction is improved to ensure that the combustion in the internal space of the glass kiln can achieve a better process and technical effect and provide more heat energy.

[0034] The structure provided by the present invention enables pure oxygen to continuously provide spiral airflow around the natural gas that is also ejected after being ejected from the spiral pipe, so that the airflow always wraps the natural gas, thereby ensuring that the natural gas is effectively mixed with the pure oxygen to the greatest extent possible, and that all gases undergo combustion chemical reactions to the greatest extent possible. Only in this way can it be ensured that combustion brings the most effective and maximum thermal energy, which is used to provide continuous and continuous high heat and high temperature to the glass kiln.

[0035] The spiral airflow in the structure provided by the present invention can ensure that all gases undergo a full combustion chemical reaction, thereby generating minimal unreactive waste gas and generating less waste gas for the glass kiln, which has a good stabilizing effect on the operation of the glass kiln.

[0036] The spiral airflow in the structure provided by the present invention can make the state of the natural gas spraying out of the structure more stable through at least four spirally surrounded pure oxygen airflows. It will not cause the flame to float and the airflow to be unstable like the original combustion structure. The spiral cylindrical state is definitely much straighter and more stable than the state without the spiral cylindrical state.

[0037] The spiral airflow in the structure provided by the present invention can reversely ensure the stable process state of the airflow pressure, flow rate, etc. of the natural gas and pure oxygen entering the structure in a more stable state, thereby more or less maintaining and controlling the operation state of the equipment and the glass kiln.

[0038] The spiral airflow in the structure provided by the present invention can ensure that the flame of the structure is reduced in a more stable state without the problem of airflow drifting. This prevents the drifting flame from burning the refractory material on the upper part of the glass kiln. This improves the service life and anti-erosion ability of the glass kiln. It can also ensure that the flame that does not drift does not affect and destroy the circulation environment of the hot air flow field inside the kiln, and ensure that the good temperature distribution environment inside the kiln space does not change significantly.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hydrogen-oxygen combustion structure for a glass furnace, characterized in that: It comprises a brick body (6); a natural gas pipeline (1) is provided in the middle of the brick body (6); the natural gas pipeline (1) and the brick body (6) are coaxially arranged; a plurality of pure oxygen pipelines are arranged circumferentially around the natural gas pipeline (1); the plurality of pure oxygen pipelines are arranged in a spiral structure around the natural gas pipeline (1).

2. The hydrogen-oxygen combustion structure for glass furnace stability according to claim 1, characterized in that: The inlet direction and the outlet direction of the plurality of pure oxygen pipelines respectively form an angle of ≥90° with the natural gas pipeline (1).

3. The hydrogen-oxygen combustion structure for glass furnace stability according to claim 2, characterized in that: The plurality of pure oxygen pipelines are distributed in a trend of being retracted toward the natural gas pipeline (1) from the inlet to the outlet.

4. The hydrogen-oxygen combustion structure for glass furnace stability according to claim 1, characterized in that: The plurality of pure oxygen pipelines are distributed in an equidistant array along the circumference of the natural gas pipeline (1).

5. The hydrogen-oxygen combustion structure for glass furnace stability according to claim 1, characterized in that: The plurality of pure oxygen pipelines include a first pure oxygen pipeline (2), a second pure oxygen pipeline (3), a third pure oxygen pipeline (4) and a fourth pure oxygen pipeline (5); the inlet position of the first pure oxygen pipeline (2) corresponds to the outlet position of the fourth pure oxygen pipeline (5); the inlet position of the second pure oxygen pipeline (3) corresponds to the outlet position of the first pure oxygen pipeline (2); the inlet position of the third pure oxygen pipeline (4) corresponds to the outlet position of the second pure oxygen pipeline (3); and the inlet position of the fourth pure oxygen pipeline (5) corresponds to the outlet position of the third pure oxygen pipeline (4).

6. The hydrogen-oxygen combustion structure for glass furnace stability according to claim 5, characterized in that: The first pure oxygen pipeline (2), the second pure oxygen pipeline (3), the third pure oxygen pipeline (4) and the fourth pure oxygen pipeline (5) are all cylindrical pipeline structures.

7. The hydrogen-oxygen combustion structure for glass furnace stabilization according to claim 1, characterized in that: The natural gas pipeline (1) is a cylindrical pipeline structure.

8. The hydrogen-oxygen combustion structure for glass furnace stability according to claim 7, characterized in that: The brick body (6) is a rectangular parallelepiped structure.

9. A working method for a stable hydrogen-oxygen combustion structure for a glass furnace according to any one of claims 1 to 8, characterized in that: The following steps are involved: The pure oxygen ejected from the plurality of pure oxygen pipelines is in the form of a spiral flow, and the natural gas ejected from the natural gas pipeline (1) is wrapped in the spiral flow of oxygen. The natural gas flow is stable and is fully mixed with the pure oxygen for combustion.

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