CN101357819B - Heating equipment and process for noble metal stock path - Google Patents
Heating equipment and process for noble metal stock path Download PDFInfo
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- CN101357819B CN101357819B CN2008101412501A CN200810141250A CN101357819B CN 101357819 B CN101357819 B CN 101357819B CN 2008101412501 A CN2008101412501 A CN 2008101412501A CN 200810141250 A CN200810141250 A CN 200810141250A CN 101357819 B CN101357819 B CN 101357819B
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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
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Abstract
The invention relates to a precious metal material channel heating device and a method which are used during the manufacturing process of flat glass and can achieve the purpose of providing the high-quality glass to a molding zone, the precious metal material channel heating device comprises a glass liquid upper extraction zone, a clarification zone, a stirring zone, a cooling zone, a material supply zone, a heating control unit for heating various zones and a measurement device for measuring the temperature of various zones, a direct electric heating device is arranged in the stirring zone, the direct electric heating device is the direct current low-voltage and high-current heating control unit which is connected on the wall of a precious metal pipe, indirect electric heating devices are arranged in the cooling zone and the material supply zone, the indirect electric heating devices wind precious metal heating wires outside the wall of the precious metal material channel pipe or adhere silicon carbide heating plates on the outside of the wall of the precious metal material channel, the precious metal heating wires or the silicon carbide heating plates are connected with the heating control unit, mixed electric heating devices are arranged in the upper extraction zone and the classification zone, and the precious metal material channel heating device has the advantages of reducing pollution, saving energy, improving production efficiency and having high glass quality.
Description
Technical field
The present invention relates to a kind of in the sheet glass manufacturing processed, use reach noble metal stock path heating unit and the method that the purpose of high-quality glass is provided to shaping area.
Background technology
The material road is the passage between connection glass melting furnace and the shaped device, and after the inner glass metal of circulation is regulated control through clarification, stirring, cooling, clarification again, thermograde, and the uniformly stable glass of acquisition can be produced in batches for moulding.The working condition in material road directly influences the quality and the load of formed glass liquid stream, especially producing special glass, particularly even more important when producing liquid crystal flat glass, be impossible if do not have ideal material road and reliable heating process and method will seek out stably manufactured.
The processing parameter that arrives formed glass liquid depends on evenly the causing property of glass metal in the material road to a great extent, and wherein the thermograde of thermal uniformity useable glass liquid horizontal direction and vertical direction is represented.What adopt mostly in common refractory road is coal G﹠O type of heating, the special glass that requires for present high quality is under the situation in the material road that adopts the precious metal material so, those common type of heating can not satisfy the production demand, long-term practical experience proves, for the temperature head of glass metal cross section in the molding mass road of high productivity, high quality glass products since glass must be controlled at ± 1.5 ℃ within.Obviously, in the material road of coal gas or oil heating, this requirement can not reach, and along with the production of flat sheet membranes goods glass and the raising of machine speed, the temperature control in material road becomes very strict, has just introduced the electrical heating process mode for this reason.
1. to expecting the requirement in road:
1), guarantee feed: the mobile power of glass metal in the material road is to provide by the liquid level difference between tank furnace 1 and the feed zone 6, sectional area is more little when the material road, and length is long more, and the glass metal viscosity is big more, when flow velocity was high more, the liquid level difference between tank furnace 1 and the feed zone 6 was big more.This potential difference can not wait for hundred centimetres to youngster by tens centimetres.First three kind factor of generalized case can't be regulated in the constant material road of having built well of glass kind, and the amount of glass in this moment feed zone is only relevant with load.If the glass metal storage is very little the time in the feed zone, shaped device can not normally obtain the glass metal supply, just can not guarantee the normal operation of producing.
2), make the feed zone temperature meet the requirements of mold temperature: temperature of glass liquid is than high many of mold temperature, so the material road must make the cooling of glass metal balance in the tank furnace 1.Because the production efficiency difference of goods, moulding require the temperature difference can reach about 15 ℃, so the cooling ability in material road should be adjustable.Table 1 has been provided by the temperature of glass liquid that the overflow down draw sheet glass of friction-motion speed requires feed zone to provide.
3), make feed temperature stable: the feed zone temperature variation can directly make the shaper overflow can't ordinary production.1250 ℃ the time, temperature variation can cause viscosity to change 5% for 2 ℃ for high borosilicate glass, and load changes 3%, and all products are scrapped in batch.Therefore require the temperature in material road must guarantee to stablize general requirement feed temperature being changed within a class ± 1.5 ℃.Certainly the moulding pull speed is high more, and is high more to the stability requirement of material channel temp.
4), make feed temperature even: to have only feed temperature evenly could guarantee that the product goods are even, when the feed zone place temperature difference surpasses 3 ℃, obvious ripple will occur, draw glass defect such as trace to form.
5), the glass metal in the material road is further clarified: in special sheet glass goods, noble metal stock path also has a more importantly function, that is exactly that glass metal is clarified in inside, effectively get rid of the microvesicle in the glass metal, so just need in the horizontal direction and apply a thermograde, the processing requirement according to certain that allows is further clarified, homogenizing.
6), make the glass metal in the material road eliminate striped: the function of another one noble metal stock path makes glass metal further even by increasing stirring area exactly, very tiny striped is eliminated, so just require to have at this district's glass metal the thermograde of a vertical direction, it is to lean on stirring technique, the temperature regulation technology in this district to realize jointly.
In sum, formulating a cover high reliability, high performance noble metal stock path heating unit and method is crucial in the production process of flat glass substrate.Traditional type of heating can not satisfy the production requirement of noble metal stock path.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art and a kind of particularly high quality requirement of TFT-LCD process of glass of extraordinary sheet glass of can satisfying is provided, reach the noble metal stock path heating unit and the method that reduce the purpose of polluting, save the energy, enhancing productivity.
The object of the present invention is achieved like this:
A kind of heating unit of noble metal stock path, the settling section that comprises the glass metal Shang Ti district that is connected with melting pool, is connected with Shang Ti district, the stirring area that is connected with settling section, the cooling zone that is connected with stirring area, the feed zone that is connected with the cooling zone, be responsible for the measuring apparatus that adds thermal control units and measure each interior temperature in district, it is characterized in that to each district's heating:
Be provided with direct electric heater unit in stirring area, directly electric heater unit is for directly being connected the thermal control units that adds of the high electric current of DC low-voltage on the precious metal tube wall,
In cooling zone and feed zone, be provided with indirect electric heater unit, electric heater unit is meant at noble metal stock path tube wall outside winding precious metal heater strip or in noble metal stock path tube wall outside and posts the silicon carbide hot-plate indirectly, precious metal heater strip or silicon carbide hot-plate with add thermal control units (7) and be connected
Be provided with the mixing electric heater unit in Shang Ti district and settling section, mixing electric heater unit is that above-mentioned direct electric heater unit and indirect electric heater unit are set on the noble metal stock path tube wall simultaneously.
The thickness of pipe that is heated noble metal stock path of each heating zone of described noble metal stock path is not less than 0.2mm.
Described noble metal stock path heating zone is made by in a kind of or its alloy in noble metal platinum, palladium, ruthenium, rhodium, the iridium any.
The thermal control units that adds in each district adopts electrically heated can regulate the power regulator control mode, and each heating unit is formed heating closed-loop control unit jointly with the temperature measuring equipment that is no less than.
A kind of heating means of noble metal stock path is characterized in that: the different sections at this noble metal stock path adopt different type of heating, and are specific as follows:
1), the glass metal Shang Ti district that is connected with melting pool, with settling section that the Shang Ti district is connected in adopt and mix Electric heating,
2), in the stirring area that is connected with settling section, adopt direct Electric heating, directly Electric heating is meant and realizes directly for the mode of the perfectly straight stream low voltage and high current of precious metal tube wall,
3), adopt indirect Electric heating in the feed zone that is connected in the cooling zone that is connected with stirring area with the cooling zone, Electric heating is meant at material road tube wall outside winding precious metal heater strip or in material tube wall outside, road and posts the silicon carbide hot-plate indirectly, and perfectly straight stream low voltage and high current is realized heating.
The present invention has following positively effect:
1, vital role of the present invention is exactly to create a cover to mix electric heater unit and method in field, sheet glass material road, make the glass metal that comes from tank furnace can be heated to 1500 ℃ and secondary clearing, stirring, cooling, thermograde are regulated again, temperature process optimizes more in the inside, this material road, finally reach the purpose that the high-quality glass melt is provided to moulding.
2, another aspect of the present invention is exactly that electrically heated closed-loop control mediation function in the thermograde mediation process is powerful, well-known in the liquid crystal flat glass manufacturing processed thermograde processing requirement at noble metal stock path section glass metal complicated and changeable, and temperature controlling range more greatly can be from 1250 ℃---mediate between 1550 ℃; Also electric work is reconciled the unit for this reason and proposes higher technical requirements, make under the situation of 24VDC voltage stabilizing control, require to reconcile electric current can be up to 3000A.
3, adopt electrical heating process can solve the defective of traditional way, saving production cost, reduce energy consumption, reduce under the situation about polluting and satisfied the production demand.Along with the development of electricity fusing-aid technology, noble metal stock path also can adopt complete electric smelting technology fully.
Description of drawings
Fig. 1 is the structural representation of the heating unit of noble metal stock path of the present invention.
Fig. 2 is the structural representation of the mixing electric heater unit of noble metal stock path of the present invention.
Fig. 3 is the structural representation of the indirect electric heater unit of noble metal stock path of the present invention.
Embodiment
Illustrate implementation method of the present invention below in conjunction with Fig. 1,2,3.
A kind of heating unit of noble metal stock path, the settling section 3 that comprises the glass metal Shang Ti district 2 that is connected with melting pool 1, is connected with Shang Ti district 2, the stirring area 4 that is connected with settling section 3, the cooling zone 5 that is connected with stirring area 4, the feed zone 6 that is connected with cooling zone 5, be responsible for the measuring apparatus 8 that adds thermal control units 7 and measure each interior temperature in district, it is characterized in that to each district's heating:
Be provided with direct electric heater unit in stirring area 4, directly electric heater unit adds thermal control units 7 for what directly be connected the high electric current of DC low-voltage on the precious metal tube wall,
In cooling zone 5 and feed zone 6, be provided with indirect electric heater unit, electric heater unit is meant at noble metal stock path tube wall outside winding precious metal heater strip or in noble metal stock path tube wall outside and posts the silicon carbide hot-plate indirectly, precious metal heater strip or silicon carbide hot-plate with add thermal control units 7 and be connected
Be provided with the mixing electric heater unit in Shang Ti district 2 and settling section 3, mixing electric heater unit is that above-mentioned direct electric heater unit and indirect electric heater unit are set on the noble metal stock path tube wall simultaneously.
The thickness of pipe that is heated noble metal stock path of each heating zone of described noble metal stock path is not less than 0.2mm.
Described noble metal stock path heating zone is made by in a kind of or its alloy in noble metal platinum, palladium, ruthenium, rhodium, the iridium any.
The thermal control units 7 that adds in each district adopts electrically heated can regulate the power regulator control mode, each heating unit 7 and the temperature measuring equipment 8 common heating closed-loop control unit of forming that are no less than.
A kind of heating means of noble metal stock path is characterized in that: the different sections at this noble metal stock path adopt different type of heating, and are specific as follows:
1), the glass metal Shang Ti district 2 that is connected with melting pool 1, with settling section 3 that Shang Ti district 2 is connected in adopt and mix Electric heating,
2), in the stirring area 4 that is connected with settling section 3, adopt direct Electric heating, directly Electric heating is meant and realizes directly for the mode of the perfectly straight stream low voltage and high current of precious metal tube wall,
3), adopt indirect Electric heating in the feed zone 6 that is connected in the cooling zone 5 that is connected with stirring area 4 with cooling zone 5, Electric heating is meant at material road tube wall outside winding precious metal heater strip or in material tube wall outside, road and posts the silicon carbide hot-plate indirectly, and perfectly straight stream low voltage and high current is realized heating.
1. the selection of Electric heating:
Direct Electric heating of the present invention is to adopt to realize heating unit 01 shown in (as Fig. 2) and 02 part directly for the mode of the perfectly straight stream low voltage and high current of precious metal tube wall; The indirect heating mode adopts that precious metal is peripheral to twine that precious metal 05 (heating unit 03 as shown in Figure 2 and 04 part) or tube wall (001) are outer to paste carborundum plate (002) and perfectly straight stream low voltage and high current is realized heating (shown in Figure 3).
As shown in Figure 1, export at tank furnace that there is following particular requirement in the tagma on the glass metal between the settling section:
(1) when keeping in repair, noble metal stock path needs cooling significantly
(2) when ordinary production, need to heat up significantly
Because above 2 requirements have just determined must adopt the bigger mixing Electric heating of scope of compromise in this zone, it must guarantee when it heats up and can be heated to about 1500 ℃ by about 1400 ℃ the glass metal that tank furnace is next till cooling the time can guarantee that glass metal can viscosity increases the artificial control of straight way and do not flow.
In settling section 3 zones, owing to require the glass temperature gradient to regulate the discharge that span of control is beneficial to microvesicle in the glass metal greatly.The spy also has been suitable for the mixing Electric heating in this zone.
Because glass metal vertical distribution comparatively dense herein has the stirring mechanism effect simultaneously, consider that this regional temperature processing requirement is for the ease of safeguarding that the spy just adopts direct Electric heating in stirring area 4.
In the cooling zone 5, processing requirement must can drop to temperature of glass liquid about 1250 ℃ from 1350 ℃ in this zone, so just directly having adopted indirect Electric heating, the present invention is that materials deferent wall outside winding precious metal heater strip (Fig. 2) and silicon carbide hot-plate (Fig. 3) are realized jointly.
In feed zone 6, because temperature process variation herein is less and to stabilize to the master, the spy has only adopted the indirect heating mode of the peripheral heat tracing of carborundum plate (Fig. 3).
2. electrically heated realization
Adopt heating unit 7 to finish each as shown above and distinguish electrically heated conciliation and control.
Adopt temperature survey point 8 and heating unit 7 to finish the closed-loop control of each heating unit jointly, thereby form the temperature of glass liquid technology controlling and process of expecting the road.
2. electric-heating technology: material road electrically heated can be divided into according to type of heating: indirect type electrically heated, direct type electrically heated and hybrid battery heating.
1), direct type, indirect type and hybrid battery heating:
The indirect type electrically heated: adopt heating units such as globars, Si-Mo rod and platinum wire to heat in material periphery, road, its heat exchange depends on radiation to enter glass metal.This Electric heating can prevent to expect local superheating, and the material road is vertical and horizontal thermal uniformity is good.Yet, because being with the precious metal pipeline outward, surrounds glass metal, so heat absorption is under some influence, heat-energy losses is very serious, and the electrically heated thermo-efficiency of indirect type is lower, is generally 30-50%.
The direct type electrically heated: directly give precious metal tube wall segmentation energising, direct heating precious metal tube wall directly offers glass metal with heat, and its exchanged form is based on the thermal conduction form.This type of heating, the thermograde of not only expecting vertical and horizontal is very little, and the thermograde of vertical direction is also less, but strict to the adjusting control of temperature like this, avoid occurring local superheating, can cause the life-span of noble metal stock path when serious to have a strong impact on.Direct type electrically heated thermo-efficiency utilizes higher, can reach 80-85%.
Hybrid battery heating: indirect type and the electrically heated strong point of direct type are combined.
Adopted the parallel mixing Electric heating of direct and indirect electrically heated in the selection of material road type of heating, particular case is as follows:
At the temperature process position of having relatively high expectations in material road (for example: settling section 3) adopted the direct heating mode.
Processing requirement in the material road is lower, needs the less position of heat (for example: feed zone 6) adopt the indirect heating mode.
In the processing requirement of expecting the road (for example: stirring area 4) adopt the directly indirect also mixing Electric heating of usefulness than complicated position.
The calculating and the transformer efficiency of material road electrically heated energy consumption are determined:
The numerical value of transformer efficiency depends on the thermal parameter of glass metal: specific heat C, load M and temperature rise △ t.The heat that the glass metal per minute is drawn is:
Q
Glass=GC △ t=GC (t
2-t
1)
And equivalent electric adds the joule's heat energy of thermogenesis:
Q
=0.24P * 60=14.4P
Be GC △ t=14.4P
G-----load Kg/min
△ t---temperature rise ℃
Kcal/Kg. ℃ of C-----specific heat, the glass specific heat C electrically heated energy consumption calculation that different temperature of glass liquid is corresponding different: the heat that need replenish when the electrically heated energy consumption is meant material road ordinary production.Glass metal is a temperature-fall period in the material road, so ideal situation is not need additional heat.But owing to flow into the glass metal in material road the temperature difference is arranged, and glass metal cooling in the material road also can produce the temperature difference, adding glass metal needs during clarification heat to heat etc. in the material road.For above factor is considered just need add heat.
Material road thermal equilibrium is as follows:
Q
i+Q
l＝Q
l+Q
o+Q
o+Q
d
Q
i------enters the heat also brought into of glass in material road
Q
l------heat is brought in electrically heated into
Q
l------material road heat lost by radiation
Q
o--the heat that----formed glass liquid is taken away
Q
o--the heat that----cooling is taken away
Q
d------overcomes glass temperature difference institute heat requirement
The required energy consumption in electrically heated material road is relevant with several factors, is difficult to summarize with accurate data.Comprise glass self character, precious metal pipeline wall thickness, site environment influence, the loss of heater element own or the like.
Transformer efficiency is determined: needed heat when the electrically heated power demand depends primarily on the energy consumption of the material required compensation in road and glass metal is clarified once more.When the decision transformer capacity, also need to consider:
(1) capacity that need be imbued with because of the transformer impedance coupling;
(2) start first and in the situation of restarting when repairing;
(3) have a power failure after because temperature reduces amplitude situation (big heat heating) in order to resume production as early as possible greatly;
Each distinguishes determining of Electric heating:
Should dispose according to following rule generally speaking:
(1) at first determines each region characteristic according to material road structure and production technique demand;
(2) need compensation or the big zone of heating heat should use direct mode;
(3) can adopt the indirect mode heating in the less place of heat supplement;
(4) should be suitable for the mixing Electric heating in the bigger zone of temperature gradient demand;
Illustrate as follows below:
For example in settling section 3 parts, because glass metal needs clarification in this zone, so the thermograde of one's respective area is bigger, independent direct heating or indirect heating mode can not satisfy process requirements, just need take to mix Electric heating, specifically as shown in Figure 2: wherein be the thicker part of caliber and adopted 01,02 two unit of direct heating needing glass metal to be heated under the high temperature clarification part, and adopted indirect heating Unit 03; Just processing requirement can have been satisfied and need insulation place just to be suitable for indirect heating Unit 04 in the thin part of caliber.
Claims (5)
1. the heating unit of a noble metal stock path, the settling section (3) that comprises the glass metal Shang Ti district (2) that is connected with melting pool (1), is connected with Shang Ti district (2), the stirring area (4) that is connected with settling section (3), the cooling zone (5) that is connected with stirring area (4), the feed zone (6) that is connected with cooling zone (5), be responsible for it is characterized in that to the adding thermal control units (7) and measure the measuring apparatus (8) that each distinguishes interior temperature of each district's heating:
Be provided with direct electric heater unit in stirring area (4), directly electric heater unit adds thermal control units (7) for what directly be connected the high electric current of DC low-voltage on the precious metal tube wall,
In cooling zone (5) and feed zone (6), be provided with indirect electric heater unit, electric heater unit is meant at noble metal stock path tube wall outside winding precious metal heater strip or in noble metal stock path tube wall outside and posts the silicon carbide hot-plate indirectly, precious metal heater strip or silicon carbide hot-plate with add thermal control units (7) and be connected
Be provided with the mixing electric heater unit in Shang Ti district (2) and settling section (3), mixing electric heater unit is that above-mentioned direct electric heater unit and indirect electric heater unit are set on the noble metal stock path tube wall simultaneously.
2. the heating unit of noble metal stock path according to claim 1, it is characterized in that: the thickness of pipe that is heated noble metal stock path of each heating zone of described noble metal stock path is not less than 0.2mm.
3. the heating unit of noble metal stock path according to claim 1 is characterized in that: described noble metal stock path heating zone is made by in a kind of or its alloy in noble metal platinum, the palladium any.
4. the heating unit of noble metal stock path according to claim 1, it is characterized in that: the thermal control units (7) that adds in each district adopts electrically heated can regulate the power regulator control mode, each heating unit (7) and be no less than one temperature measuring equipment (8) and heat the closed-loop control unit common the composition.
5. the heating means of a noble metal stock path is characterized in that: the different sections at this noble metal stock path adopt different type of heating, and are specific as follows:
1), the glass metal Shang Ti district (2) that is connected with melting pool (1), with settling section (3) that Shang Ti district (2) are connected in adopt and mix Electric heating,
2), in the stirring area (4) that is connected with settling section (3), adopt direct Electric heating, directly Electric heating is meant and realizes directly for the mode of the perfectly straight stream low voltage and high current of precious metal tube wall,
3), adopt indirect Electric heating in the feed zone (6) that is connected in the cooling zone (5) that is connected with stirring area (4) with cooling zone (5), Electric heating is meant at material road tube wall outside winding precious metal heater strip or in material tube wall outside, road and posts the silicon carbide hot-plate indirectly, and perfectly straight stream low voltage and high current is realized heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101412501A CN101357819B (en) | 2008-09-02 | 2008-09-02 | Heating equipment and process for noble metal stock path |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101412501A CN101357819B (en) | 2008-09-02 | 2008-09-02 | Heating equipment and process for noble metal stock path |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101357819A CN101357819A (en) | 2009-02-04 |
| CN101357819B true CN101357819B (en) | 2011-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101412501A Expired - Fee Related CN101357819B (en) | 2008-09-02 | 2008-09-02 | Heating equipment and process for noble metal stock path |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101905530B (en) * | 2010-07-16 | 2012-10-24 | 沈阳飞机工业（集团）有限公司 | Heating/heat insulation platform of heat former |
| CN105948462B (en) * | 2016-06-01 | 2019-07-09 | 东旭科技集团有限公司 | Platinum channel heating device, method and platinum channel and glass producing system |
| CN108485686B (en) * | 2018-05-28 | 2020-07-10 | 青岛伊诺威能源化工新技术有限公司 | Double-row mixed flow internal and external dynamic heating solid organic matter pyrolysis combined device |
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Owner name: HE NAN STATE-OWNED YUFEI ELECTRONIC GLASS CO., LTD Free format text: FORMER OWNER: HENAN ANFEI ELECTRONIC GLASS CO., LTD. Effective date: 20110602 |
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Effective date of registration: 20110602 Address after: 450016 4 floor, information industrial park, Eighth Avenue, economic and technological development, Zhengzhou, Henan Patentee after: Henan State-controlled Yufei Electronic Glass Co., Ltd. Address before: 450048 No. ninth, 1509 Avenue, Zhengzhou economic and Technological Development Zone, Henan Patentee before: Henan Anfei Electronic Glass Co., Ltd. |
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Granted publication date: 20110126 Termination date: 20130902 |