CN202576194U - Electric melting kiln heating device for melting borosilicate glass - Google Patents
Electric melting kiln heating device for melting borosilicate glass Download PDFInfo
- Publication number
- CN202576194U CN202576194U CN2012201200603U CN201220120060U CN202576194U CN 202576194 U CN202576194 U CN 202576194U CN 2012201200603 U CN2012201200603 U CN 2012201200603U CN 201220120060 U CN201220120060 U CN 201220120060U CN 202576194 U CN202576194 U CN 202576194U
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- electrode
- electric smelting
- borosilicate glass
- heating unit
- electrode block
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
The utility model provides an electric melting kiln heating device for melting borosilicate glass. The electric melting kiln heating device comprises a melting pool, wherein at least two pairs of electrode bricks are arranged on the melting pool symmetrically; the electrode bricks are distributed on the two sides of a kiln by taking the axis of the electric melting kiln as a center; and the distance between adjacent two electrode bricks on the same side is 2 to 4 times the width of each electrode brick. According to the electric melting kiln heating device, electric heating is taken as the primary and gas heating is taken as the secondary, so that the flow of molten glass is strengthened, the uniformity of the glass liquid is improved, and the problem caused by the layering of high-borosilicate glass is eliminated. The electrode bricks are controlled by a rectifier-inverter-isolator power supply; the phenomenon of three-phase power supply imbalance is avoided; simultaneously, the distribution of power lines in the glass liquid is optimized by adjusting the phase angle difference of the adjacent electrode bricks; the situation that the glass is not melt uniformly at dead corners around the electrode is improved; the defects such as concretion are reduced; and a special uninterrupted power supply (UPS) is not required for supplying power, so that the power supply cost is low.
Description
Technical field:
The utility model belongs to the manufacturing field of TFT-LCD glass substrate, relates to a kind of glass furnace heating unit.
Background technology:
The existing glass furnace that is used for processed glass production mainly contains forms such as direct heating and indirect heating, distinguishes from type of heating, mainly contains electrically heated and founds and two kinds of the oil gas heating technology of founding.Found technology than oil gas heating, the glass furnace volume that the electrically heated technology of founding adopts is little, stable performance, safety is high, organization of production is flexible, is glass smelting technology commonly used at present.
Glass is the good insulation performance body under room temperature state, but under high temperature fused state, glass metal but is a good conductor.Utilize the characteristic of glass under different phases just, can adopt electrode that electric current is imported glass metal, utilized the mode of the joule heating heating glass raw material of glass metal energising back self to come fusion cast glass.Liquid-crystalline glasses belongs to borosilicate glass, and its feed composition has determined that this glass needs higher melting temperature (Tm).In typical glass furnace flame heating device; The glass metal bottom is because far away apart from flame space, and temperature is lower, moreover the heat conduction of glass metal is with mobile relatively poor; Make the glass metal at the bottom of the fusion pond, pond keep lower temperature and long residence time; This is disadvantageous for borosilicate glass, causes the glass phase-splitting easily, brings fusion defectives such as calculus.Adopt the heated by electrodes mode, the glass metal that is in molten state after the electrifying electrodes is a conductor, and the mobile homogeneity of glass metal that makes of having strengthened glass metal improves, and has eliminated the problem that the high-boron-silicon glass layering is brought.
Electric smelting gear great majority adopt the gear of " single-phase power regulating eqiupment+X-former " at present.This gear adopts single phase power supply to cause the power supply three-phase imbalance easily, and power supply needs to adopt the UPS mode to supply power, and power supply cost is high, and glass metal fusing effect in place, dead angle is bad around the electrode, brings the defective of quartz particles etc. easily.
The utility model content:
The purpose of the utility model provides a kind of electric smelting kiln heating unit that is used to melt borosilicate glass, improves the fusion quality of TFT-LCD borosilicate glass, has eliminated the problem that the high-boron-silicon glass layering is brought, and has reduced generation of defects such as calculus.Simultaneously reasonably the power supply design optimization distribution of power line in glass metal, reduced the cost of power supply, improved electrode around place, dead angle glass dissolve uneven situation, increased the electrically heated proportion simultaneously, make it to reach the effect of even fusing.
To achieve these goals, the utility model adopts following technical scheme:
A kind of electric smelting kiln heating unit that is used to melt borosilicate glass comprises melting pool, is symmetrically installed with at least two counter electrode bricks on the melting pool; Electrode block is that central distribution is in the kiln both sides with electric smelting kiln axis; The spacing of homonymy adjacent electrode brick is 2 to 4 times of electrode block width.
The utility model further improves and is: electrode block is at the bottom of symmetry centre is inserted the pool wall or pond of melting pool with electric smelting kiln axis.
The utility model further improves and is: electrode block is inboard with concordant at the bottom of pool wall or the pond.
The utility model further improves and is: electrode block exposes 20-50mm at the bottom of pool wall or the pond.
The utility model further improves and is: electrode block exposes 5-10mm at the bottom of pool wall or the pond.
The utility model further improves and is: the structure of electrode block is that accumulation piece, the some layerings that some electrodes accumulations that are coated in the flame retardant coating form is coated on hierarchical block or the some electrode body that is coated on the stick electrode formation in the flame retardant coating that the electrode in the flame retardant coating forms.
The utility model further improves and is: the length of electrode block is 2 to 3 times of melting pool pool wall thickness, is provided with supporting water cooling plant around the electrode block.
The utility model further improves and is: electrode block distance in both sides is the 20%-50% of adjacent electrode brick spacing near the inboard minor increment of melting pool pool wall.
The utility model further improves and is: said electric smelting kiln heating unit comprises that also at least two pairs is the gas combustion apparatus of central distribution in the kiln both sides with the kiln axis.
The utility model further improves and is: said electric smelting kiln heating unit also comprises a master control board, and its control interface connects a three phase rectifier unit, an inversion unit and an isolation voltage transformation unit respectively; The unitary input terminus of three phase rectifier connects three-phase supply, and output terminal connects the input terminus of inversion unit, and the output terminal of inversion unit connects the input terminus of isolating voltage transformation unit, isolates the output terminal connection electrodes brick of voltage transformation unit.
The utility model further improves and is: every counter electrode brick uses the controlled ac power supply apparatus of separate single-phase.
The utility model further improves and is: the phase angle difference setting range of the controlled AC power of each separate single-phase is between 0 degree to 180 degree; The power phase angular difference scope of adjacent electrode brick is between 0 degree to 90 degree; The frequency of isolating voltage transformation unit is 50Hz-15KHz.
With respect to prior art; The utlity model has following advantage: the type of heating that the utility model provides is main with electrically heated, and combustion gas is heated to be auxilliary, comprises more than two pairs with the kiln axis being the electrode block that symmetry centre is distributed in both sides at least; Keep a determining deviation between the homonymy electrode block; Consider that electric current distribution is even, avoid between the electrode because apart from the short circuit that causes, the spacing of homonymy adjacent electrode brick is about 2.0-4.0 times of distance of electrode block width; Reduced simultaneously because the superheated of bottom glass causes the souring to brick at the bottom of the pond, guaranteed that simultaneously electrode block heats the ratio that shared glass metal absorbs heat.Kiln two end electrodes brick distance is the 20%-50% of adjacent electrode brick spacing near the inboard minor increment of pool wall, makes electrode block be placed in the kiln both sides equably like this, makes homogeneous heating.Electrode block is immersed in the glass melt, the 2.0-4.0 that the length of electrode block is about pool wall/pond base thickness degree doubly, electrode block inboard with pool wall/pond at the bottom of internal surface concordant, can prevent that electrode block from causing obstruction to glass metal is mobile, reduced the erosion of glass metal counter electrode simultaneously.Can regularly electrode block be advanced 50mm-100mm along its length, employed electrode block is tindioxide or platinum.Also comprise gas combustion apparatus more than at least two pairs, as auxiliary fusion.The utility model has the advantages that with electrically heated to be main, combustion gas is heated to be auxilliary, has strengthened flowing of glass metal, and the homogeneity of glass metal is improved, and has eliminated the problem that the high-boron-silicon glass layering brings.Electrode block adopts the power supply control of " rectification-inversion-isolation " can not cause the three phase supply energy imbalance; Regulate adjacent electrode brick phase angle difference simultaneously and optimized the distribution of power line in glass metal; Place, dead angle glass fuses uneven situation around having improved electrode; Reduce generation of defects such as calculus, reduced the cost of power supply.
Description of drawings:
Fig. 1 is the application implementation example of electric smelter heating unit in pool wall, and this figure is a vertical view.
Fig. 2 is that electrode block is piled up the piece sectional view.
Fig. 3 is electrode block differential profile figure.
Fig. 4 is the bar-shaped sectional view of electrode block.
Fig. 5 is the application implementation example of electric smelter heating unit at the bottom of the pond, and this figure is a vertical view.
Embodiment:
In following detailed description, the unrestricted purpose for explanation has provided the embodiment that discloses specific particular case, thereby the understanding fully to the utility model is provided.But the content that those skilled in the art pass through to be disclosed can be with the mode that is different from the given specific particular case of this paper, realize the utility model in other embodiments, and this is conspicuous to those skilled in the art.
Be to be the example explanation the glass metal of symmetry centre in pool wall inserts kiln with two counter electrode with the kiln axis below.Electrode block 2 symmetries as shown in Figure 1 are installed on the pool wall of melting pool 1, and electrode used therein brick 2 usefulness high temperature materials constitute, like tindioxide, platinum etc.In order to guarantee electrode life, the electrode surface current density should not be too big, is controlled at 0.7A/cm
2Below; Because the processing of electrode is difficulty very, electrode used therein brick 2 width are generally 100-200mm, consider that electric current distribution is even; Avoid between the electrode because apart from the short circuit that too closely causes, the spacing of homonymy adjacent electrode brick 2 is about 2.0-4.0 times of distance of electrode block width.Electrode block 2 is settled in place, and this is then can not guarantee sufficient amount of heat because electrode block 2 lower surfaces are too high at the bottom of the pond, if too low then bottom glass can superheated, can aggravate the souring of brick at the bottom of the pond like this, accelerates the erosion of refractory brick at the bottom of the pond.Kiln two end electrodes brick distance is the 20%-50% of adjacent electrode brick 2 spacings near the inboard minor increment of melting pool 1 pool wall, and electrode block 2 is evenly distributed, and electric current distribution is even, homogeneous heating.The length of electrode block is about 2.0-3.0 times of pool wall thickness, and electrode block is inboard concordant with the pool wall internal surface, perhaps stretches in the glass metal, and the length that stretches into is 20-50mm, preferred 5-10mm; Can prevent that electrode block from causing obstruction to glass metal is mobile, and reduce the erosion of glass metal counter electrode.Meanwhile, regularly electrode block is advanced 50mm-100mm along its length.Around electrode, supporting water cooling plant is arranged, but counter electrode cools off.If the utility model uses tindioxide as the electrode block material.So, along with the loss of electrode block, it can be used as replenishing of finings.
Like Fig. 2, shown in 3,4, respectively accumulation piece, hierarchical block and the club shaped structure sectional view of pool wall electrode block among the figure, wherein 6 is refractory materials, 7 is electrode.
As shown in Figure 1, the three-phase mains power supply becomes the single loop direct supply through three phase rectifier unit 3 after the rectification; Become frequency 50HZ, the single-phase AC power source of sine wave that amplitude changes according to technology controlling and process after 4 conversion of single loop direct supply process inversion unit; From the single-phase 50HZ AC power source of sine wave of inversion unit 4 outputs, through isolating voltage transformation unit 5, become isolated single-phase 50HZ AC power source of sine wave after the conversion, output on the electrode, formed the single-phase heating circuit power supply of electrode.This gear can not cause the three phase supply energy imbalance, does not need special UPS power supply, and power supply cost is low.Simultaneously every counter electrode brick uses the controlled ac power supply apparatus of separate single-phase, and controlled AC power amplitude of each separate single-phase and phasing degree can be adjusted, and between the adjacent electrode block control power supply phase angle difference is arranged.Being adjusted in the current inversion process of phasing degree, the phase angle difference of each separate single-phase AC power is adjustable, and setting range is between 0 degree to 180 degree.There is phase angle difference in each adjacent electrode brick power supply, and scope is between 0 degree to 90 degree.The frequency adjustable of supply unit, its setting range are 50Hz-15KHz.Main electric force lines distribution is shown in Fig. 1 dotted line, and place, dead angle glass fused uneven situation around this Electric heating had been improved electrode, had increased the electrically heated proportion simultaneously, made it to reach the effect of even fusing.
Another embodiment is as shown in Figure 5, and electrode block is that symmetry centre is inserted the glass metal in the kiln at the bottom of the pond with the kiln axis.The supply unit of this mode is consistent with above-mentioned pool wall electrode block type of heating, and difference is that electrode block is at the bottom of the pond, to insert kiln inside.The electrode block material of this mode preferably and not only is confined to high temperature materials such as platinum.
Claims (10)
1. an electric smelting kiln heating unit that is used to melt borosilicate glass is characterized in that, comprises melting pool (1), is symmetrically installed with at least two counter electrode bricks (2) on the melting pool (1); Electrode block (2) is that central distribution is in the kiln both sides with electric smelting kiln axis; The spacing of homonymy adjacent electrode brick (2) is 2 to 4 times of electrode block width.
2. a kind of electric smelting kiln heating unit that is used to melt borosilicate glass according to claim 1 is characterized in that, electrode block (2) is at the bottom of symmetry centre is inserted the pool wall or pond of melting pool (1) with electric smelting kiln axis.
3. a kind of electric smelting kiln heating unit that is used to melt borosilicate glass according to claim 2 is characterized in that, electrode block (2) is inboard with concordant at the bottom of pool wall or the pond.
4. a kind of electric smelting kiln heating unit that is used to melt borosilicate glass according to claim 2 is characterized in that, electrode block (2) exposes 20-50mm at the bottom of pool wall or the pond.
5. a kind of electric smelting kiln heating unit that is used to melt borosilicate glass according to claim 4 is characterized in that, electrode block (2) exposes 5-10mm at the bottom of pool wall or the pond.
6. a kind of electric smelting kiln heating unit that is used to melt borosilicate glass according to claim 1; It is characterized in that the structure of electrode block (2) is that accumulation piece, the some layerings that some electrodes (7) that are coated in the flame retardant coating are piled up formation is coated on the hierarchical block of electrode (7) formation in the flame retardant coating or the electrode body that some stick electrode (7) that is coated in the flame retardant coating form; The length of electrode block (2) is 2 to 3 times of melting pool (1) pool wall thickness, and electrode block (2) is provided with supporting water cooling plant on every side.
7. a kind of electric smelting kiln heating unit that is used to melt borosilicate glass according to claim 1 is characterized in that, both sides electrode block (2) distance is the 20%-50% of adjacent electrode brick spacing near the inboard minor increment of melting pool (1) pool wall.
8. a kind of electric smelting kiln heating unit that is used to melt borosilicate glass according to claim 1 is characterized in that said electric smelting kiln heating unit comprises that also at least two pairs is the gas combustion apparatus of central distribution in the kiln both sides with the kiln axis.
9. a kind of electric smelting kiln heating unit that is used to melt borosilicate glass according to claim 1; It is characterized in that; Said electric smelting kiln heating unit also comprises a master control board, and its control interface connects a three phase rectifier unit (3), an inversion unit (4) and an isolation voltage transformation unit (5) respectively; The unitary input terminus of three phase rectifier connects three-phase supply, and output terminal connects the input terminus of inversion unit, and the output terminal of inversion unit connects the input terminus of isolating voltage transformation unit, isolates the output terminal connection electrodes brick (2) of voltage transformation unit; Every counter electrode brick uses the controlled ac power supply apparatus of separate single-phase.
10. a kind of electric smelting kiln heating unit that is used to melt borosilicate glass according to claim 9 is characterized in that, the phase angle difference setting range of the controlled AC power of each separate single-phase is between 0 degree to 180 degree; The power phase angular difference scope of adjacent electrode brick is between 0 degree to 90 degree; The frequency of isolating voltage transformation unit is 50Hz-15KHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201200603U CN202576194U (en) | 2012-03-27 | 2012-03-27 | Electric melting kiln heating device for melting borosilicate glass |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201200603U CN202576194U (en) | 2012-03-27 | 2012-03-27 | Electric melting kiln heating device for melting borosilicate glass |
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| CN202576194U true CN202576194U (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012201200603U Expired - Lifetime CN202576194U (en) | 2012-03-27 | 2012-03-27 | Electric melting kiln heating device for melting borosilicate glass |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103011553A (en) * | 2012-12-13 | 2013-04-03 | 陕西彩虹电子玻璃有限公司 | Control method for electric melting furnace based on phase-locking controller |
| CN107188393A (en) * | 2017-07-06 | 2017-09-22 | 中国建材国际工程集团有限公司 | It is a kind of to control the melting furnaces device and method that boron volatilizees in the production of borosilicate single-sheet fire-resistant glass |
| CN107941135A (en) * | 2017-12-28 | 2018-04-20 | 中建材蚌埠玻璃工业设计研究院有限公司 | A kind of device for measuring the easy attack sites tank block residual thickness of glass melter |
| CN109399894A (en) * | 2018-11-14 | 2019-03-01 | 东旭科技集团有限公司 | Electrode block propulsion method for glass furnace |
| CN113845291A (en) * | 2021-10-25 | 2021-12-28 | 北京工业大学 | Method for eliminating medium borosilicate medical glass scum and glass melting furnace structure |
| CN114890655A (en) * | 2022-04-27 | 2022-08-12 | 陕西彩虹工业智能科技有限公司 | Electric boosting power supply system for flexible glass kiln |
-
2012
- 2012-03-27 CN CN2012201200603U patent/CN202576194U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103011553A (en) * | 2012-12-13 | 2013-04-03 | 陕西彩虹电子玻璃有限公司 | Control method for electric melting furnace based on phase-locking controller |
| CN107188393A (en) * | 2017-07-06 | 2017-09-22 | 中国建材国际工程集团有限公司 | It is a kind of to control the melting furnaces device and method that boron volatilizees in the production of borosilicate single-sheet fire-resistant glass |
| CN107941135A (en) * | 2017-12-28 | 2018-04-20 | 中建材蚌埠玻璃工业设计研究院有限公司 | A kind of device for measuring the easy attack sites tank block residual thickness of glass melter |
| CN109399894A (en) * | 2018-11-14 | 2019-03-01 | 东旭科技集团有限公司 | Electrode block propulsion method for glass furnace |
| CN109399894B (en) * | 2018-11-14 | 2021-10-29 | 东旭光电科技股份有限公司 | Electrode brick propelling method for glass kiln |
| CN113845291A (en) * | 2021-10-25 | 2021-12-28 | 北京工业大学 | Method for eliminating medium borosilicate medical glass scum and glass melting furnace structure |
| CN114890655A (en) * | 2022-04-27 | 2022-08-12 | 陕西彩虹工业智能科技有限公司 | Electric boosting power supply system for flexible glass kiln |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |
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| CX01 | Expiry of patent term |