CN115745373B - Material mountain regulating and controlling device, kiln and material mountain regulating and controlling method - Google Patents
Material mountain regulating and controlling device, kiln and material mountain regulating and controlling method Download PDFInfo
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- CN115745373B CN115745373B CN202211449704.8A CN202211449704A CN115745373B CN 115745373 B CN115745373 B CN 115745373B CN 202211449704 A CN202211449704 A CN 202211449704A CN 115745373 B CN115745373 B CN 115745373B
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- 239000000463 material Substances 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000001276 controlling effect Effects 0.000 title claims description 28
- 230000001105 regulatory effect Effects 0.000 title claims description 21
- 238000002485 combustion reaction Methods 0.000 claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 87
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 22
- 239000003345 natural gas Substances 0.000 claims description 11
- 239000011449 brick Substances 0.000 claims description 9
- 239000000428 dust Substances 0.000 claims description 7
- 230000004323 axial length Effects 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000011521 glass Substances 0.000 abstract description 28
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 17
- 239000000758 substrate Substances 0.000 abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 238000002844 melting Methods 0.000 abstract description 11
- 230000008018 melting Effects 0.000 abstract description 11
- 230000007547 defect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract 1
- 230000002159 abnormal effect Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 230000005855 radiation Effects 0.000 description 5
- 230000007774 longterm Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000006066 glass batch Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention relates to the technical field of TFT liquid crystal glass substrate manufacturing, in particular to a mountain control device, a kiln and a mountain control method. Through setting up a plurality of installing ports between two adjacent material inlets on the kiln front wall, be provided with gas device in the installing port, can improve the regional temperature of front region material feeding, form the high temperature region in the middle of two material hills, through the material mountain of high temperature melting both sides skew to intermediate zone, play the feed divider effect through gas device's combustion air current simultaneously, form hot wall and cut off two material hills about, make the material mountain be heated evenly, the regional convection current of kiln front is stable, thereby guarantee material mountain, kiln temperature is stable for a long time, prevent that the material mountain from being heated unevenly, the material mountain skew improves TFT liquid crystal glass substrate smelting quality. Solves the problems of the prior art that the TFT liquid crystal glass substrate has poor melting quality and defects caused by uneven heating and deviation of the material mountain in the manufacturing process of the TFT liquid crystal glass substrate.
Description
Technical Field
The invention relates to the technical field of TFT liquid crystal glass substrate manufacturing, in particular to a mountain control device, a kiln and a mountain control method.
Background
In the production of TFT liquid crystal glass substrates, a kiln is used as one of the most expensive and important core equipment, and the main task of the kiln is to melt the batch at high temperature to form high-quality glass liquid meeting the requirements of the next working procedure, and the quality of the melted glass liquid directly influences the quality of finished glass products of a production line.
In the manufacturing process of TFT liquid crystal glass substrates, the lower part of a kiln is mainly heated by electric heating in direct contact with glass liquid, the upper space is assisted by oxy-fuel natural gas combustion to melt glass, the kiln is usually provided with a plurality of pairs of natural gas burning guns corresponding to the breast walls at two sides under the same height, and a temperature field is created in a tank furnace by natural gas combustion to melt glass raw materials.
In the TFT liquid crystal glass substrate manufacturing process, two spiral feeding type batch feeders are arranged at the front part of a kiln to continuously throw glass batch into the kiln, the glass batch just entering the kiln can generate a pile-up raw material mountain in the front region of the kiln because of low temperature, the left and right two material mountains are mutually independent, the single-side material mountain can incline to a pool wall brick at the corresponding side, the two material mountains are distributed in the kiln in a splayed shape, the material in front of the mountains part can be gradually melted into glass liquid from powder particles because of high temperature, and convection current can be formed in the front region of the kiln along with the generation of the glass liquid. The front area of the kiln is affected by feeding, and is the area for converting the glass batch from powder state to liquid state. The material mountain is crossed from side to side or is deviated from one side to the other side due to the change of the feeding and melting states, convection is changed due to the deviation of the material mountain, the temperature in the kiln is fluctuated, glass with poor melting quality flows into the next working procedure due to the fluctuation of the material mountain, the melting quality is further deteriorated due to the fluctuation of the temperature in the kiln, and therefore glass defects are generated on a finished glass plate, and the production quality and cost management are seriously influenced.
Disclosure of Invention
Aiming at the defect that in the manufacturing process of a TFT liquid crystal glass substrate, the TFT liquid crystal glass substrate has poor melting quality caused by uneven heating and offset of the material mountain in the prior art, the invention provides a material mountain regulating device, a kiln and a material mountain regulating method.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
The invention provides a material mountain regulating and controlling device which comprises a plurality of mounting ports arranged on the front wall of a kiln, wherein the mounting ports are positioned between two adjacent feeding ports, and a gas device is arranged in each mounting port and is used for heating and correcting a material mountain; the gas device is connected with a kiln combustion control system.
Preferably, the mounting opening is arranged in the area from 8m upwards to 5m downwards.
Preferably, the diameter of the mounting opening gradually increases from the outer wall of the kiln front wall to the inner wall of the kiln front wall.
Preferably, the mounting port is located on a central line between two adjacent feeding ports.
Preferably, a dust collecting brick is arranged above the mounting opening.
Preferably, the width of the dust-receiving brick is larger than the maximum diameter of the mounting opening.
Preferably, the axial length of the gas device is smaller than the thickness of the kiln front wall.
Preferably, the gas quantity of the gas device is 0-20 m 3/Hr, and the diameter of the gun head of the gas device is 2-15 mm.
The invention provides a kiln, which comprises the material mountain regulating device.
The mountain regulation and control method utilizing the device comprises the following steps:
Acquiring the area of a target flame coverage area according to the size and the position of the material mountain;
the area of the target flame coverage area is selected, and a gun head of a gas device is installed;
And controlling the air inflow of the gas device by using the kiln combustion control system, controlling the flame length and the temperature of the gas device, regulating and controlling the material mountain until the material mountain is recovered to be normal, reducing the air inflow of the gas device until the air amount of the gas device is reduced to 2.5m 3/h, closing and exiting, and finishing the regulation and control of the material mountain.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a material mountain regulating and controlling device, which is characterized in that a plurality of mounting openings are formed in the front wall of a kiln, the mounting openings are positioned between two adjacent material feeding openings, a gas device is arranged in the mounting openings, the temperature of a material feeding area in a front area can be increased through the arrangement of the gas device, a high-temperature area is formed between the two material mountain, the material mountain with two sides being deviated to the middle area is melted at high temperature, meanwhile, the material distribution effect is achieved through the combustion air flow of the gas device, a hot wall is formed to separate the left material mountain from the right material mountain, the material mountain is heated uniformly, the convection of the front area of the kiln is stable, the long-term stability of the material mountain and the kiln is ensured, the material mountain is prevented from being heated unevenly, the material mountain is deviated, and the melting quality of a TFT liquid crystal glass substrate is improved.
Further, the mounting opening is arranged to be gradually increased in diameter from the outer wall of the kiln front wall to the inner wall of the kiln front wall, flame radiation space can be reserved for the gas device, flame radiation effects are prevented from being influenced by refractory materials around the gas device, and normal operation of the gas device is guaranteed.
Further, the setting of installing port position can further ensure the effect to the adjustment of material mountain, guarantees the regional temperature of front district batch charging, further promotes the stability of material mountain temperature.
Further, the dust collecting brick can effectively prevent the flowing objects and volatile matters from falling to influence the combustion of the gas device in the melting process of the TFT liquid crystal glass substrate, so that the normal operation of the gas device is ensured, the service life of the gas device is prolonged, and the maintenance cost is reduced.
Further, the axial length of the gas device is smaller than the thickness of the front wall of the kiln, the gas device is prevented from being exposed inside the kiln, the safety of the gas device is ensured, the influence of melt pollution on the melting quality of the TFT liquid crystal glass substrate caused by melting of the gas device is prevented, and the service life of the gas device is ensured.
Further, the gas quantity and the gun head of the gas device are arranged, so that the temperature and the radiation area of the combustion flame can be ensured to meet the regulation and control standards of the material mountain.
The invention also provides a kiln, which comprises the material mountain regulating device, and has the characteristics of uniform heating and long-term stable temperature, and the quality of the melted TFT liquid crystal glass substrate is uniform, so that the production quality and the production cost are controlled, the economic benefit is good, the operation is convenient, the structure is simple, and the transformation cost is low.
The invention also provides a method for regulating and controlling the material mountain by utilizing the device, which comprises the steps of determining the area of a target flame coverage area according to the size and the position of the material mountain, selecting a gun head of a gas device, installing the gun head, controlling the air inflow of the gas device by utilizing a kiln combustion control system, controlling the flame length and the temperature of the gas device, regulating and controlling the material mountain, improving the temperature of a front feeding area, forming a high-temperature area between the two material mountains, and fusing the material mountains with high temperature and shifting to the middle area at two sides, so that the purposes of uniformly heating the material mountain and stabilizing convection of the front area of a kiln are achieved, the material mountain and the kiln temperature are ensured to be stable for a long time, and the method is simple and easy to control, and is the front technology in the technical field of TFT liquid crystal glass substrate manufacturing.
Drawings
Fig. 1 is a schematic structural diagram of a mountain adjusting and controlling device of the present invention.
Fig. 2 is a front view of a mountain adjusting and controlling device according to the present invention.
FIG. 3 is a B-B sectional view of a mountain adjusting and controlling device of the present invention.
Fig. 4 is a top view of a mountain adjusting and controlling device of the present invention.
Fig. 5 is a side view of a hill regulating device of the present invention.
FIG. 6 is a flow chart of the mountain control method of the present invention.
The device comprises a 1-mounting port, a 2-gas device, a 3-feeding port, a 4-kiln front wall, 5-dust collecting bricks, 6-material mountains, a 7-flame combustion area and an 8-gas device mounting area.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The invention will now be described in further detail with reference to specific examples, which are intended to illustrate, but not to limit, the invention.
Referring to fig. 1 to 5, the invention discloses a mountain regulating device, which comprises a plurality of mounting ports 1, wherein the mounting ports 1 are arranged between two adjacent feeding ports 3 on a kiln front wall 4; the gas device 2 is arranged in the mounting opening and is used for heating and correcting the material mountain 6, and the axial length of the gas device 2 is smaller than the thickness of the kiln front wall; the gas device 2 is connected with a kiln combustion control system; the mounting port1 is arranged in a gas device mounting area 8 with a feeding port 3 upwards along 8m and a feeding port 3 downwards along 5 m. The diameter of the mounting port1 gradually increases from the outer wall of the kiln front wall 4 to the inner wall of the kiln front wall 4, and is positioned on the central line between two adjacent feeding ports 3. The dust collecting brick 5 is arranged above the mounting opening 1, and the width of the dust collecting brick 5 is larger than the maximum diameter of the mounting opening 1. Preferably, the gas amount of the gas device 2 is 0-20 m 3/Hr, the diameter of the gun head of the gas device 2 is 2-15 mm, and the flame combustion area 7 is positioned between two adjacent material mountains 6. Preferably, the gas device 2 is a oxy-fuel natural gas burner.
The invention provides a kiln, which comprises the material mountain regulating device. The kiln has the characteristics of uniform heating and long-term stable temperature, and the melted TFT liquid crystal glass substrate has uniform quality, so that the production quality and the production cost are controlled, the economic benefit is good, the operation is convenient, the structure is simple, and the transformation cost is low.
Referring to fig. 6, the invention also provides a mountain adjusting and controlling method using the device, which comprises the following steps:
s1: acquiring the area of a target flame coverage area according to the size and the position of the material mountain 6; and determining the area of the target flame coverage area according to the positions and the sizes of the material mountains on two sides of the gas device or the offset from one material mountain to the other material mountain.
S2: selecting a gun head of the gas device 2 according to the area of the target flame coverage area, and installing; the size of the diameter of the gun head of the gas device 2 can influence the size of the flame radiation area, the smaller the diameter of the gun with the same gas quantity is, the smaller the flame radiation area is, and conversely, the larger the diameter of the gun head is, the larger the flame radiation area is. According to the sizes of the material mountains on two sides of the gas device 2 and the area of the area needing to be covered by flame, selecting the corresponding diameter of the burning gun to reach a reasonable flame coverage area; when the gun head is installed, the natural gas valve is closed, the gun head with the required diameter is replaced, the natural gas valve is opened, and the combustion state of the gun head is confirmed.
S3: the method comprises the steps of controlling the air inflow of a gas device 2 by using a kiln combustion control system, controlling the flame length and the temperature of the gas device 2, regulating and controlling the gas mountain 6 until the gas mountain 6 is recovered to be normal, reducing the air inflow of the gas device until the gas amount of the gas device 2 is reduced to 2.5m 3/h, closing and exiting, completing regulation and control of the gas mountain 6, controlling the air inflow of the gas device 2 by using the kiln combustion control system to adjust the flame length and the coverage area, realizing corresponding adjustment of the melting temperature, regulating and controlling the gas mountain 6 until the gas amount of the gas device 2 is reduced to 2.5m 3/h, closing and exiting, and completing regulation and control of the gas mountain 6.
Example 1
The material mountain at one side of a kiln is abnormal in deviation to the material mountain at the position 1m away from the front wall, and a gun head with the diameter of 12mm is selected according to the size and the deviation position of the material mountain, so that a sufficient flame coverage area is ensured; starting a gas device 2, and adjusting the initial natural gas amount to be 3m 3/h, wherein the ratio of the natural gas to the oxygen is 1:2.5; the flame length of the combustion gun is adjusted by adjusting the gas quantity of the combustion gun, and finally the flame length covers the front end of the side abnormal change material mountain, so that the flame is effectively divided and the side material mountain with abnormal change is melted; after the state of the two side material mountains is confirmed to be normal, after the stable observation is carried out for 24 hours, the gas quantity of the gas device 2 is reduced at the speed of 1m 3/h until the gas quantity of the gas device is reduced to 2.5m 3/h, the gas gun is closed and withdrawn, and the regulation and control of the side material mountains are completed.
Example 2
The lateral material mountain of one kiln is abnormal in deviation from the lateral material mountain to the other kiln at the distance of 2m from the front wall 4 of the kiln, and a gun head with the diameter of 6mm is selected according to the size and the deviation position of the material mountain, so that the enough flame coverage area is ensured; starting a gas device 2, and adjusting the initial natural gas amount to be 3m 3/h, wherein the ratio of the natural gas to the oxygen is 1:2.5; the flame length of the combustion gun is adjusted by adjusting the gas quantity of the combustion gun, and finally the flame length covers the front end of the side abnormal change material mountain, so that the flame is effectively divided and the side material mountain with abnormal change is melted; after the state of the two side material mountains is confirmed to be normal, after the stable observation is carried out for 24 hours, the gas quantity of the gas device 2 is reduced at the speed of 1m 3/h until the gas quantity of the gas device is reduced to 2.5m 3/h, the gas gun is closed and withdrawn, and the regulation and control of the side material mountains are completed.
In summary, the invention provides a mountain control device, a kiln and a mountain control method, which can improve the temperature of a front feeding area through the arrangement of a gas device and the adjustment of the gas quantity, form a high-temperature area in the middle of two mountain materials, melt the mountain materials with two sides offset to the middle area at high temperature, and simultaneously play a role in distributing the mountain materials through the combustion air flow of the gas device, form a hot wall to separate the left mountain material mountain from the right mountain materials, ensure the mountain materials and the kiln to be heated uniformly, ensure the long-term stability of the mountain materials and the kiln temperature, prevent the mountain materials from being heated unevenly, and improve the melting quality of the TFT liquid crystal glass substrate.
The foregoing description of the preferred embodiment of the present invention is not intended to limit the technical solution of the present invention in any way, and it should be understood that the technical solution can be modified and replaced in several ways without departing from the spirit and principle of the present invention, and these modifications and substitutions are also included in the protection scope of the claims.
Claims (9)
1. The mountain regulation and control device is characterized by comprising a plurality of mounting ports (1) arranged on a kiln front wall (4), wherein the mounting ports (1) are positioned between two adjacent feeding ports (3), and a gas device (2) is arranged in each mounting port and is used for heating and correcting a mountain (6); the gas device (2) is connected with a kiln combustion control system, the gas device (2) is a full-oxygen natural gas burning gun, the gas quantity of the gas device (2) is 0-20 m 3/Hr, the diameter of the gun head of the gas device (2) is 2-15 mm, and a flame combustion area (7) is positioned between two adjacent material mountains (6).
2. The mountain control device according to claim 1, characterized in that the mounting opening (1) is arranged in the region from 8m upwards of the feed opening (3) to 5m downwards of the feed opening (3).
3. The mountain control device according to claim 1, characterized in that the diameter of the mounting opening (1) increases gradually from the outer wall of the kiln front wall (4) to the inner wall of the kiln front wall (4).
4. The mountain control device according to claim 1, characterized in that the mounting opening (1) is located on the centre line between two adjacent feed openings (3).
5. The mountain adjusting and controlling device according to claim 1, characterized in that a dust collecting brick (5) is arranged above the mounting opening (1).
6. The mountain controlling device according to claim 5, characterized in that the width of the dust receiving brick (5) is larger than the largest diameter of the mounting opening (1).
7. The hill regulating device according to claim 1, characterized in that the axial length of the gas device (2) is smaller than the thickness of the kiln front wall.
8. A kiln comprising a hill regulating device according to any one of claims 1 to 7.
9. A mountain control method using the device of any one of claims 1 to 7, comprising the steps of:
Acquiring the area of a target flame coverage area according to the size and the position of the material mountain (6);
The area of the target flame coverage area is selected, and the gun head of the gas device (2) is installed;
The kiln combustion control system is used for controlling the air inflow of the gas device (2), controlling the flame length and the temperature of the gas device (2), regulating and controlling the material mountain (6), reducing the air inflow of the gas device until the material mountain (6) is recovered to be normal, closing and exiting after the air inflow of the gas device (2) is reduced to 2.5m 3/h, and completing the regulation and control of the material mountain (6).
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| CN202211449704.8A CN115745373B (en) | 2022-11-18 | 2022-11-18 | Material mountain regulating and controlling device, kiln and material mountain regulating and controlling method |
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| CN202211449704.8A CN115745373B (en) | 2022-11-18 | 2022-11-18 | Material mountain regulating and controlling device, kiln and material mountain regulating and controlling method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208151206U (en) * | 2018-04-27 | 2018-11-27 | 韶关市汇明特种玻璃有限公司 | A kind of electric heater for special glass production line |
| CN112777919A (en) * | 2020-12-28 | 2021-05-11 | 彩虹显示器件股份有限公司 | Advanced substrate glass melting device and method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH054820A (en) * | 1991-06-25 | 1993-01-14 | Nippon Electric Glass Co Ltd | Vitrification of metallic foreign matter generated by reaction with molybdenum electrode in molten glass |
| CN202099178U (en) * | 2011-06-09 | 2012-01-04 | 山东玻纤复合材料有限公司 | Novel arrangement structure of pure oxygen burners for glass fiber kiln |
| CN203461941U (en) * | 2013-07-28 | 2014-03-05 | 安徽丹凤集团桐城玻璃纤维有限公司 | Glass founding unit kiln |
| CN213060636U (en) * | 2020-08-31 | 2021-04-27 | 秦皇岛玻璃工业研究设计院有限公司 | Combustion system for glass kiln and glass kiln |
| CN113772922A (en) * | 2021-09-10 | 2021-12-10 | 卢爱民 | Energy-saving environment-friendly heat accumulating type transverse flame furnace top charging glass melting furnace and production method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208151206U (en) * | 2018-04-27 | 2018-11-27 | 韶关市汇明特种玻璃有限公司 | A kind of electric heater for special glass production line |
| CN112777919A (en) * | 2020-12-28 | 2021-05-11 | 彩虹显示器件股份有限公司 | Advanced substrate glass melting device and method |
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