CN1289417C - Method of sealing in small spatial obstructs at entrance end of tin pot in product line float glass, and seal structure - Google Patents
Method of sealing in small spatial obstructs at entrance end of tin pot in product line float glass, and seal structure Download PDFInfo
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- CN1289417C CN1289417C CN 03134930 CN03134930A CN1289417C CN 1289417 C CN1289417 C CN 1289417C CN 03134930 CN03134930 CN 03134930 CN 03134930 A CN03134930 A CN 03134930A CN 1289417 C CN1289417 C CN 1289417C
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- tin bath
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- nitrogen
- chute
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Abstract
The present invention provides a method and a structure for partitioning and sealing a small space on the entrance end of a tin bath on a production line of float glass, and belongs to the production technology of the float glass. A flow bath and the tin bath are partitioned effectively by using a mode of arranging a partition wall, and a closed space with a small ventilation gap can be formed in the upper space of the flow bath between a flow capacity flashboard (3) and the partition wall (6); pure nitrogen gas is led into the space from both sides, and consequently the space can be formed into a sealed area of pure nitrogen; the pressure of the space is set higher than the pressure of the tin bath and the pressure of a cooling part of a melting kiln, and gas in the tin bath can be effectively prevented from escaping and coagulating on the periphery of the flow capacity flashboard by using a pressure balancing theory; gas in the melting kiln can be effectively prevented from entering the tin bath. In the present invention, good sealing effects can be obtained by using the method of establishing the sealed area of pure nitrogen and using the pressure balancing theory; the problem that the stability of float production is disturbed by great gas quantity can be solved simultaneously; the pressure of the upper part of the flow bath can be raised effectively to obtain the purpose of partitioning and preventing the gas in the tin bath from being communicated with the outside.
Description
Affiliated technical field
The invention belongs to the float glass technology, what relate generally to is a kind of floatation glass production line molten tin bath entrance end little space exclusion seal method and sealed structure.
Background technology
Melting furnaces, molten tin bath, annealing furnace are three big Thermal Equipments of float glass.Admixtion becomes the glass metal with good fluidity through high temperature melting in melting furnaces, and clarification, be cooled to 1100 ℃ after, enter molten tin bath through runner, chute.Swim on the tin liquor face, under the effect of mechanical external force, form the sheet glass with certain thickness, width, tin liquor very easily oxidation generates SnO
2So, in molten tin bath, feed N
2+ H
2Prevent the intrusion of ambient atmos as shielding gas.The molten tin bath entrance end is the connecting portion of melting furnaces, molten tin bath two big Thermal Equipments, be melting furnaces outlets be again the import of molten tin bath, as shown in Figure 3: entrance end comprises runner, chute, flow flashboard 3, safe flashboard 2, front arch 4; Its effect is the glass metal that fusing is good, sends into molten tin bath by melting furnaces, and controls the glass metal flow that flows into molten tin bath by the flow flashboard, and melting furnaces atmosphere, molten tin bath atmosphere cross in this effusion.If it is bad that entrance end seals, cuts off effect, very easily form following problem, glass quality is had a strong impact on:
1, melting furnaces atmosphere enters molten tin bath, and entrained S ion in the melting furnaces atmosphere increases considerably the tin liquor volatile quantity, and forms SnS with the tin liquor reaction
2, form light distortion, mass defects such as tin is assorted, tin sticky.
2, molten tin bath atmosphere is overflowed around the flow flashboard, and entrained tin steam is met oxygen at this and formed SnO in the molten tin bath atmosphere
2, and be deposited in around the flashboard, form mass defects such as cassiterite.
3, H
2Gas is met the oxygen burning at flow flashboard place, make the glass local superheating, and produces bubble.
4, the entrance end sealing effectiveness is poor, makes the control of molten tin bath internal pressure be subjected to serious restriction.The control difficulty that tin liquor is polluted in the molten tin bath strengthens.
Therefore, entrance end cuts off, the quality of sealing effectiveness produces directly influence to glass quality is good and bad.
Present its sealing means of floatation glass production line molten tin bath entrance end mainly is to feed nitrogen at the molten tin bath front end, utilize the high speed outflow of gas to form one nitrogen gas wall at molten tin bath front end position, connected space with transversely truncation molten tin bath and chute, stop the effusion of gas in the molten tin bath, thereby reach the effect of sealing gland.As shown in Figure 4, its structure mainly is before the molten tin bath first road barricade, is close on the both sides molten tin bath breastwork of barricade to be provided with a pair of nitrogen bag, and nitrogen sprays perpendicular to glass flow direction level from the aperture of tens road φ 3mm.But because the span at this place is generally about 2-3 rice, structurally be without any isolated connected state between chute and molten tin bath, nitrogen and molten tin bath space also are unobstructed connected state, because purity nitrogen blows out between position and the molten tin bath and is interconnected, after pure nitrogen gas is blown into from both sides, the interior mixed gases of very fast and groove, can't form the gas wall that barrier gas is overflowed, the purity nitrogen air-flow rigidity that adds the ejection of nitrogen bag is along with the ejection distance increases very fast decay, so gas breakthrough in middle part purity nitrogen air-flow is easy to by groove is difficult to form the pure nitrogen gas wall.Because gas self has certain pressure in the groove, by calculating every side 200Bm
3The purity nitrogen flow of/h also can't guarantee the full requirement that cuts off, and the low excessively a large amount of gases of temperature cause the temperature of glass liquid homogeneity by meeting at this and seriously influence, and glass quality is descended, and the production degree of stability reduces.Therefore, the method that rolls up nitrogen flow also can not adopt.So the structure of this form, can't satisfy the purpose that production line is separated entrance end and molten tin bath atmosphere from the situation of practical application.
Summary of the invention
Purpose of the present invention promptly is to propose a kind of floatation glass production line molten tin bath entrance end little space exclusion seal method and sealed structure, adopts pressure balanced principle, reaches the better seal effect by the method for setting up the purity nitrogen seal area.
The present invention finishes its invention task by the following technical solutions: adopt the mode that divider wall is set, chute and molten tin bath are effectively cut off, the chute upper space between flow flashboard and divider wall forms the enclosed space in little ventilative gap; Feed pure nitrogen gas from these spatial both sides, thereby make this space form the purity nitrogen seal area; And make the pressure of this space pressure greater than molten tin bath and melting furnaces cooling end, and utilize pressure balanced principle, effectively stop the effusion of gas in the molten tin bath and around the flow flashboard, condense; Also effectively stop the interior gas of melting furnaces to enter molten tin bath.Its sealed structure is: the position of being close to the molten tin bath barricade in chute and molten tin bath joint portion is provided with divider wall, and to make gap of glass metal in the chute, divider wall bottom be 20mm-50mm; Make that molten tin bath space and chute space are fully isolated opens, effectively stop the effusion of gas in the molten tin bath, and make chute upper space between divider wall and the flow flashboard form the enclosed space in little ventilative gap; Set groove as channel of nitrogen in the bottom of divider wall, front arch; And make the groove common channel of nitrogen that feeds nitrogen to this space that constitutes that communicates with the grooved brick of chute side wall upper part setting; The channel of nitrogen outer end is communicated with source nitrogen; Utilize the little favourable condition of chute upper space, form certain gaseous tension with less nitrogen amount at the chute upper space, utilize pressure balanced principle, effectively stop the effusion of gas in the molten tin bath and around the flow flashboard, condense, and utilize fluid mechanics principle to calculate 20-40Bm under the normal temperature
3The nitrogen flow of/h just can form the pressure of 40-50Pa in this space, and greater than the pressure of molten tin bath, this flow nitrogen is very faint to the cooling effect of glass under 1100 ℃ of temperature, and as calculated, cooling extent has only 0.5-1 ℃, can not form secondary face effect.
The present invention adopts pressure balanced principle, reach the purpose of sealing by the method for setting up the purity nitrogen seal area, utilizing the gas flow at high speed to form curtain wall with original technical scheme compares to reach the sealing gland effect, the sealing gland principle difference that adopts, big change has also taken place in the sealing gland effect, the present invention has overcome original technical scheme needs the big characteristics of nitrogen flow, and the nitrogen usage quantity significantly reduces, and has solved the disturbance of atm number to the float glass process production stability.And chute upper space pressure is raise, reach and utilize pure nitrogen gas to cut off the purpose that molten tin bath atmosphere is in communication with the outside.
Molten tin bath entrance end sealing means and corresponding sealed structure that the present invention proposes, through tentative use and effect observation, result of use is good, is specially:
1, through 8 months tentative use, up to the present brick material service condition was good, ANOMALOUS VARIATIONS do not occur.
2, nitrogen feeding amount is every side 15Bm
3/ h.Only, normal thereafter in the slight fluctuations that causes flow in a flash that has just fed.Do not make the interior glass metal upper surface cooling of chute too much, and cause the temperature of glass liquid inequality, quality is not had any impact.
3, the molten tin bath internal pressure obviously improves, and under the identical situation of other conditions, brings up to 47Pa by original 34Pa.Chute upper space pressure has reached 50Pa through actual measurement.
4, regulate flashboard blue flare all around and disappeared, illustrate that the effusion of gas around flashboard obtained obvious suppression in the groove.
5, by the sampling analysis to flashboard place accumulation, the content of stannic oxide obviously reduces.Accumulation also obviously reduces, and purges number of times and is reduced.
Description of drawings
Accompanying drawing 1 is molten tin bath entrance end sealed structural representation of the present invention.
Accompanying drawing 2 is the A-A sectional view of Fig. 1.
Accompanying drawing 3 is the structural representation of the original molten tin bath entrance end of floatation glass production line.
Accompanying drawing 4 is the original molten tin bath entrance end of a floatation glass production line sealed structural representation.
Among the figure, 1, the runner arch, 2, safe flashboard, 3, the flow flashboard, 4, front arch, 5, channel of nitrogen, 6, divider wall, 7, the molten tin bath barricade, 8, suspender member, 9, glass metal, 10, tin liquor, 11, brick at the bottom of the runner, 12, the chute brick, 13, bottom brick of molten tin bath, 14, the grooved brick, 15, the nitrogen bag.
Embodiment
In conjunction with the accompanying drawings, embodiments of the invention are described as follows:
As shown in Figure 1, 2, by the mode of divider wall is set between chute and molten tin bath, make the partition state that forms little ventilative gap between molten tin bath and the chute, and make the chute upper space between flow flashboard 3 and the divider wall 6 constitute the enclosed space that has only little ventilative gap, take to feed the mode of nitrogen from the upper space between two side direction flow flashboards and the divider wall, in this space also is the space formation purity nitrogen seal area on chute top, floatation glass production line with 300 tons of day fusing amounts is an example, and the nitrogen feeding amount of every side is 15Bm
3/ h can form the 50Pa gaseous tension at the chute upper space, greater than the pressure of molten tin bath and melting furnaces cooling end, effectively stops the effusion of gas in the molten tin bath and condenses around the flow flashboard; Also effectively stop the interior gas of melting furnaces to enter molten tin bath.
Concrete sealed structure is: the position of being close to the molten tin bath barricade in chute and molten tin bath joint portion is provided with divider wall 6, the gap of glass metal is 30mm in divider wall 6 bottoms and the chute, thus, make chute space and molten tin bath space constitute the isolation in little ventilative gap, the bottom of front arch 4, divider wall 6 has the groove as channel of nitrogen, in the chute side wall upper part grooved brick 14 is set, the groove and the grooved brick of front arch 4, divider wall 6 bottoms constitute channel of nitrogen 5 jointly, and channel of nitrogen 5 outer ends are communicated with source nitrogen.In order to prevent that divider wall is owing to the fracture and the phenomenon that drops in use appear in stress concentration, hanging mechanism is adopted in the installation of isolated brick, promptly the wall brick of divider wall is hung on the longeron at molten tin bath top by suspender member 8, the stress of focal point of stress is decomposed, effectively reduce degree of risk, even the crack occurs, there is the traction of top steel part also to be unlikely to drop.
Claims (2)
1, the little space of a kind of floatation glass production line molten tin bath entrance end exclusion seal method, it is characterized in that: adopt the mode that divider wall is set, chute and molten tin bath are effectively cut off, and the chute upper space between flow flashboard (3) and divider wall (6) forms the enclosed space in little ventilative gap; Feed pure nitrogen gas from these spatial both sides, thereby make this space form the purity nitrogen seal area; And make the pressure of this space pressure greater than molten tin bath and melting furnaces cooling end, and utilize pressure balanced principle, effectively stop the effusion of gas in the molten tin bath and around the flow flashboard, condense; Also effectively stop the interior gas of melting furnaces to enter molten tin bath.
2, the little space of a kind of floatation glass production line molten tin bath entrance end exclusion seal structure, it is characterized in that: the position of being close to molten tin bath barricade (7) in chute and molten tin bath joint portion is provided with divider wall (6), and to make gap of glass metal in the chute, divider wall (6) bottom be 20mm-50mm; Make that molten tin bath space and chute space are fully isolated opens, effectively stop the effusion of gas in the molten tin bath, and make chute upper space between divider wall (6) and the flow flashboard (3) form the enclosed space in little ventilative gap; Set groove as channel of nitrogen (5) in the bottom of divider wall (6), front arch (4); And the grooved brick (14) that groove and chute side wall upper part the are provided with common channel of nitrogen that feeds nitrogen to this space that constitutes that communicates; Channel of nitrogen (5) outer end is communicated with source nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03134930 CN1289417C (en) | 2003-09-28 | 2003-09-28 | Method of sealing in small spatial obstructs at entrance end of tin pot in product line float glass, and seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03134930 CN1289417C (en) | 2003-09-28 | 2003-09-28 | Method of sealing in small spatial obstructs at entrance end of tin pot in product line float glass, and seal structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1600713A CN1600713A (en) | 2005-03-30 |
| CN1289417C true CN1289417C (en) | 2006-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03134930 Expired - Fee Related CN1289417C (en) | 2003-09-28 | 2003-09-28 | Method of sealing in small spatial obstructs at entrance end of tin pot in product line float glass, and seal structure |
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Families Citing this family (13)
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| JP5751252B2 (en) * | 2010-04-28 | 2015-07-22 | 旭硝子株式会社 | Molten glass feeder |
| CN102329064B (en) * | 2011-10-24 | 2013-09-04 | 成都光明光电股份有限公司 | Glass flow control device and method for prolonging service life of glass flow control device |
| JP2016084241A (en) * | 2013-02-18 | 2016-05-19 | 旭硝子株式会社 | Method and apparatus for manufacturing glass plate |
| CN103113017B (en) * | 2013-03-19 | 2016-03-23 | 成都光明光电股份有限公司 | Glass metal flow passage device |
| CN104016572A (en) * | 2014-06-30 | 2014-09-03 | 成都光明光电股份有限公司 | Manufacturing method and device of float glass |
| JP6264232B2 (en) * | 2014-09-01 | 2018-01-24 | 旭硝子株式会社 | Atmosphere partition device and float glass manufacturing device |
| CN108892364B (en) * | 2018-09-25 | 2021-03-30 | 台玻安徽玻璃有限公司 | Low-distortion float glass runner port structure |
| CN110255868B (en) * | 2019-07-31 | 2024-04-02 | 上海耀皮玻璃集团股份有限公司 | Float glass forming device and forming method for improving utilization efficiency of shielding gas |
| CN110713335A (en) * | 2019-11-06 | 2020-01-21 | 蚌埠中建材信息显示材料有限公司 | Glass runner sealing device |
| CN110668679B (en) * | 2019-11-26 | 2023-10-27 | 中国洛阳浮法玻璃集团有限责任公司 | Float glass manufacturing device and manufacturing method thereof |
| CN111170618B (en) * | 2019-11-27 | 2024-06-18 | 海南海控特玻科技有限公司 | Molten glass steady flow control mechanism suitable for tin bath inlet of special glass float process |
| CN111875237B (en) * | 2020-08-14 | 2022-05-24 | 蚌埠中光电科技有限公司 | Tin bath inlet channel for float electronic display glass production |
| CN112794628B (en) * | 2021-01-14 | 2022-07-19 | 河北光兴半导体技术有限公司 | Tin bath device |
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- 2003-09-28 CN CN 03134930 patent/CN1289417C/en not_active Expired - Fee Related
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| CN1600713A (en) | 2005-03-30 |
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