CN115771995A - Float glass tin bath purging device - Google Patents
Float glass tin bath purging device Download PDFInfo
- Publication number
- CN115771995A CN115771995A CN202211718662.3A CN202211718662A CN115771995A CN 115771995 A CN115771995 A CN 115771995A CN 202211718662 A CN202211718662 A CN 202211718662A CN 115771995 A CN115771995 A CN 115771995A
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- China
- Prior art keywords
- inert gas
- tin bath
- umbrella cap
- top cover
- diversion
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- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 title claims abstract description 198
- 238000010926 purge Methods 0.000 title claims abstract description 65
- 239000005329 float glass Substances 0.000 title claims abstract description 33
- 239000011261 inert gas Substances 0.000 claims abstract description 393
- 239000011449 brick Substances 0.000 claims abstract description 124
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 24
- 239000006185 dispersion Substances 0.000 claims abstract description 6
- 239000012530 fluid Substances 0.000 claims description 36
- 238000007664 blowing Methods 0.000 claims description 13
- 239000011521 glass Substances 0.000 abstract description 49
- 238000005485 electric heating Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 230000007547 defect Effects 0.000 abstract description 8
- 206010037544 Purging Diseases 0.000 description 51
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 45
- 238000010438 heat treatment Methods 0.000 description 31
- 229910052757 nitrogen Inorganic materials 0.000 description 21
- 238000002360 preparation method Methods 0.000 description 20
- 239000007788 liquid Substances 0.000 description 19
- 230000000694 effects Effects 0.000 description 14
- 230000009471 action Effects 0.000 description 12
- 239000002585 base Substances 0.000 description 12
- 150000003839 salts Chemical class 0.000 description 10
- 235000015170 shellfish Nutrition 0.000 description 10
- 238000009826 distribution Methods 0.000 description 9
- 150000003606 tin compounds Chemical class 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 7
- 229910052739 hydrogen Inorganic materials 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 6
- RPACBEVZENYWOL-XFULWGLBSA-M sodium;(2r)-2-[6-(4-chlorophenoxy)hexyl]oxirane-2-carboxylate Chemical compound [Na+].C=1C=C(Cl)C=CC=1OCCCCCC[C@]1(C(=O)[O-])CO1 RPACBEVZENYWOL-XFULWGLBSA-M 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 229910001873 dinitrogen Inorganic materials 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 150000002431 hydrogen Chemical class 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000010408 sweeping Methods 0.000 description 3
- 229910006404 SnO 2 Inorganic materials 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000006060 molten glass Substances 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen(.) Chemical compound [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 238000006124 Pilkington process Methods 0.000 description 1
- 150000001339 alkali metal compounds Chemical class 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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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- Furnace Details (AREA)
Abstract
The invention discloses a float glass tin bath purging device which comprises a tin bath, an inert gas system and a flow guide assembly, wherein the tin bath comprises a top cover and a bottom brick, the top cover of the bottom brick is provided with a top cover brick, and the inert gas system is used for introducing inert gas into the top cover; the water conservancy diversion subassembly is including distributing a plurality of diverters in the overhead guard, a plurality of the diverters can be with inert gas dispersion and form the gas curtain and cover at least 90% of the top surface area of top cap brick. The invention can clean the deposits on the tin bath top cover brick, the electric heating element and the related accessory equipment, thereby reducing the problem of glass belt defects caused by the deposits falling into molten tin or the glass belt and effectively improving the production quality and the yield of the glass belt.
Description
Technical Field
The invention relates to the technical field of float glass production, in particular to a tin bath blowing device for float glass.
Background
On a float glass or float ultra-thin electronic glass production line, glass liquid enters a tin bath from a melting furnace to be formed into a glass ribbon, and the formed glass ribbon further enters an annealing furnace from the tin bath. The tin bath is a core device for forming glass liquid into a glass belt, the tin bath comprises a top cover and a bottom brick, a top cover brick is further arranged in the tin bath, the space in the tin bath is divided into a cover inner space and a groove inner space by the top cover brick, a wiring busbar is arranged in the cover inner space, a wiring end of an electric heating element is connected with the wiring busbar through a cable in the cover, and a heating end of the electric heating element is arranged in the groove inner space. The glass liquid is shaped in the tin bath and takes place in the bath space of the tin bath, the bath space of the tin bath is filled with molten tin medium (namely tin liquid) for floating and throwing the glass liquid, the glass liquid and the tin liquid are not mutually wetted, the glass liquid flowing into the tin bath from a melting furnace floats on the tin liquid and is freely polished in a high temperature state, the glass liquid with certain viscosity is drawn into a glass plate with certain thickness under the action force of the main transmission along the longitudinal central line backwards and the transverse action force of the edge roller vertical to the longitudinal central line, and the thickness of the glass plate can reach 0.20mm to 25mm.
The molten glass entering the tin bath from the melting furnace often carries a large amount of SO 3 And a volatile alkali metal compound; at the same time, the formed glass ribbon leaves the tin bath and enters the annealing kiln, O 2 Inevitably, the gap which is drawn out of the glass ribbon from the outlet of the tin bath enters the tin bath and is diffused to the whole tin bath; secondly, there is a gap at the position of the rod of the edge roller penetrating into the tin bath, and the gap inevitably has O 2 And penetrate into the tin bath. Since the tin liquor is easily oxidized at high temperature to generate various tin compounds, the tin liquor is easily mixed with SO in the tin bath at the high temperature of more than 950 DEG C 3 、O 2 Reacting to generate SnO, snS and SnO 2 . In the reducing atmosphere of the tin bath, snO will dissolve in the tin bath and will be present in the atmosphere in the bath as vapour, while SnS is very volatile and insoluble in the tin bath, and the volatiles of SnO or SnS will deposit on the cooler surfaces, such as in the crevices of the roof bricks in the tin bath, towards the shutters, and on the unused electrical heating elements, again as solid SnO when further oxidized 2 Is deposited. In addition, when Na is contained in the molten glass + 、K + 、Cl - In the process, naCl and KCl vapor are inevitably volatilized in the tin bath, and are deposited at the gaps of the tin bath top cover bricks and on the electric heating elements.
Along with the continuous volatilization and deposition of SnO, snS, naCl and KCl, the deposit inevitably falls into molten tin and floats on a glass ribbon of the molten tin when sinkingThe deposits fall onto the glass ribbon causing drips or asperity defects on the upper surface of the glass sheet. When the deposit falls into the tin liquid, a certain amount of SnS and SnO is achieved in the tin liquid 2 Then, the following reaction takes place: snS + SnO 2 →SnSO 4 +2Sn，SnSO 4 Is a good tin plating material, is easy to be adsorbed on the lower surface of the glass ribbon, and simultaneously Sn is easy to be contacted with SnSO 4 The complexing of the tin and the tin-dipping defects on the lower surface of the glass strip is caused.
Therefore, there is a great need for a method of cleaning the tin bath roof bricks, electrical heating elements and associated ancillary equipment, i.e. SnO, snS, snO, in the float process for producing glass 2 NaCl and KCl to reduce the problem of glass belt defects caused by the deposits falling into the molten tin or the glass belt, thereby effectively improving the production quality and yield of the glass belt.
Disclosure of Invention
Aiming at the defects in the prior art, the technical problem to be solved by the invention is as follows: how to provide a float glass tin bath blowing device which can clean deposits on tin bath top cover bricks, electric heating elements and related accessory equipment, thereby reducing the problem of glass ribbon defects caused by the deposits falling into molten tin or a glass ribbon and effectively improving the production quality and the yield of the glass ribbon.
In order to solve the technical problem, the invention adopts the following technical scheme:
a float glass tin bath purging device is characterized by comprising a tin bath, an inert gas system and a flow guide assembly, wherein the tin bath comprises a top cover and a bottom brick, a top cover brick is arranged on an upper cover of the bottom brick, and the inert gas system is used for introducing inert gas into the top cover; the water conservancy diversion subassembly is including distributing a plurality of diverters in the overhead guard, a plurality of the diverters can be with inert gas dispersion and form the gas curtain and cover at least 90% of the top surface area of top cap brick.
The working principle of the invention is as follows: when the purging device is used, inert gas is introduced into the top cover through the inert gas system, when the purging device is used specifically, the inert gas can be nitrogen gas, helium gas, argon gas and other inert gases, the inert gas introduced into the top cover has certain pressure, the high-pressure inert gas introduced into the top cover is further dispersed by the fluid directors in the flow guide assembly, each fluid director enables the high-pressure inert gas to flow along a set track, the proper arrangement of the positions of the fluid directors can enable the fluid directors to disperse the high-pressure inert gas and cover at least 90% of the area of the top surface of the top cover brick, and meanwhile, under the flow guide effect of the flow guide assembly, the inert gas integrally adopts a purging mode to directly act on the top cover brick from top to bottom, so that Na salts, K salts and tin compounds attached to a tin bath top cover brick seam and a heating element are cleaned under the action of gravity, the problem of the defects of glass belts caused by the falling of the deposits onto tin bath or the glass belts is reduced, and the production quality and the yield of the glass belts are effectively improved.
Preferably, the fluid director passes through dead lever fixed connection in on the inner wall of overhead guard, the fluid director includes at least one water conservancy diversion umbrella hat, the one end of water conservancy diversion umbrella hat is radial opening, the other end with inert gas system intercommunication, a plurality of diffluence holes have been seted up to the water conservancy diversion umbrella hat, establish the passageway in the water conservancy diversion umbrella hat, inert gas that inert gas system input is followed the one end of water conservancy diversion umbrella hat gets into and follows the diffluence hole flows out.
Therefore, when inert gas is input into the top cover, one end of the flow guide umbrella cap communicated with the inert gas system is a radial opening, so that the inert gas can be dispersed at a certain angle, and meanwhile, the design of the flow distribution holes on the flow guider can also ensure that the inert gas flows downwards in a dispersed manner through the flow distribution holes, so that the inert gas can be more uniformly dispersed and covered on the top cover brick.
Preferably, the water conservancy diversion umbrella hat includes first water conservancy diversion umbrella hat, second water conservancy diversion umbrella hat and third water conservancy diversion umbrella hat, first water conservancy diversion umbrella hat cover is established on the second water conservancy diversion umbrella hat, second water conservancy diversion umbrella hat cover is established on the third water conservancy diversion umbrella hat, the one end of first water conservancy diversion umbrella hat with inert gas system intercommunication, and pass through the diffluence hole carries inert gas second water conservancy diversion umbrella hat third water conservancy diversion umbrella hat.
Thus, the inert gas is input into the first diversion umbrella cap from the inert gas system and then is conveyed to the second diversion umbrella cap and the third diversion umbrella cap through the diversion holes, so that the bundled inert gas can be uniformly dispersed and covered on the top cover brick.
Preferably, a plurality of diversion holes are distributed on the first diversion umbrella cap, the second diversion umbrella cap and the third diversion umbrella cap along the circumferential direction, and the number of the diversion holes on the first diversion umbrella cap, the second diversion umbrella cap and the third diversion umbrella cap is more than or equal to 4.
Therefore, the plurality of the shunting holes can realize a more uniform dispersion effect on the inert gas.
Preferably, the diversion holes in the first diversion umbrella cap, the diversion holes in the second diversion umbrella cap and the diversion holes in the third diversion umbrella cap are circumferentially staggered in sequence.
Like this, the reposition of redundant personnel hole on each water conservancy diversion umbrella hat is in the dislocation set in proper order in circumference to in with the better drainage to lower floor's water conservancy diversion umbrella hat of inert gas on the upper strata water conservancy diversion umbrella hat, thereby improve the drainage effect to inert gas.
Preferably, the cross section of the first guide umbrella cap has a first base angle with an angle α 1, the cross section of the second guide umbrella cap has a second base angle with an angle α 2, and the cross section of the third guide umbrella cap has a third base angle with an angle α 3, and the angle α 1 is more than 0 ° and less than α 2 and less than α 3 is less than 90 °.
Thus, after the high-pressure inert gas enters the top cover, the inert gas sequentially passes through the flow guide umbrella caps with certain angles (alpha 1, alpha 2 and alpha 3), so that the inert gas is gradually dispersed according to a certain angle, and the bundled inert gas can be uniformly dispersed and covered on the top cover brick. Preferably, the maximum radial length of the opening of the first flow-guiding umbrella cap is D1, the maximum radial length of the opening of the second flow-guiding umbrella cap is D2, the maximum radial length of the opening of the third flow-guiding umbrella cap is D3, and D1 < D2 < D3 is satisfied.
Therefore, the maximum radial length of the openings of the diversion umbrella caps is sequentially increased from top to bottom, so that the high-speed bundled gas flow of the inert gas can be gradually dispersed, and the inert gas can uniformly and effectively cover the top cover brick.
Preferably, the perpendicular distance from the end, close to the inert gas system, of the cross section of the first diversion umbrella cap to the end far away from the inert gas system is h1, the perpendicular distance from the end, close to the inert gas system, of the cross section of the second diversion umbrella cap to the end far away from the inert gas system is h2, the perpendicular distance from the end, close to the inert gas system, of the cross section of the third diversion umbrella cap to the end far away from the inert gas system is h3, and h1 is more than h2 and less than h3 is satisfied.
Therefore, the vertical distance from one end, close to the inert gas system, of the cross section of each flow guide umbrella cap to one end, far away from the inert gas system, is increased continuously, so that the inert gas is drained downwards and dispersed continuously under the action of each flow guide umbrella cap, and all areas, corresponding to the top cover bricks, of the fluid director can be covered by the inert gas more effectively.
Preferably, the inert gas system comprises an inert gas main pipe, the inert gas main pipe is used for introducing inert gas, a plurality of inert gas branch pipes are arranged on the top cover along the length direction of the tin bath, each inert gas branch pipe is communicated with the inert gas main pipe, a plurality of inert gas branch pipes are arranged on the inert gas branch pipes along the width direction of the tin bath, and the inert gas branch pipes extend into the top cover so as to introduce the inert gas into the top cover through the inert gas branch pipes.
The inert gas main pipe is connected to the inert gas preparation station through a special pipeline, the inert gas with certain pressure is provided by the inert gas preparation station, the pressure of the inert gas reaches 0.2-0.7Mpa, the inert gas entering the inert gas main pipe is further conveyed to the inert gas branch pipes at all positions to realize purging treatment at different positions in the length direction of the tin bath, the inert gas entering the inert gas branch pipes is finally conveyed into the top cover through the inert gas branch pipes, the inert gas branch pipes arranged along the width direction of the tin bath on the inert gas branch pipes can realize the effect of conveying the inert gas to different positions in the width direction of the tin bath, and the high-pressure inert gas conveyed into the top cover through the inert gas branch pipes is further dispersed under the action of the fluid director to form a gas curtain to cover the top surface of the top cover brick so as to finally realize the purging effect of the tin bath.
Preferably, a plurality of the diversion holes are circumferentially distributed on the diversion umbrella cap, and the aperture of each diversion hole is 20-150% of the inner diameter of the inert gas branch pipe.
Like this, the reposition of redundant personnel hole can make inert gas pass in order to move down to the top cap brick's in corresponding region top, and a plurality of reposition of redundant personnel holes of circumference distribution can realize the reposition of redundant personnel effect more even to inert gas.
Preferably, a main pipe valve is arranged on the main inert gas pipe, a branch pipe valve is arranged on the branch inert gas pipe, and a branch pipe valve is arranged on the branch inert gas pipe.
Therefore, the valves are respectively arranged on the pipelines of the inert gas system, and the valves at different positions can be opened or closed according to requirements, so that the purging requirements of different positions of the tin bath can be better met.
Preferably, the pressure of the inert gas in the inert gas main pipe, and/or the pressure of the inert gas in the inert gas branch pipe are 0.2-0.7Mpa.
Thus, the pressure of the inert gas input into the top cover can be ensured, and the purging effect is further ensured.
Preferably, the inert gas branch pipe is hermetically connected with a position where the inert gas branch pipe extends into the top cover.
Therefore, the inert gas branch pipe is connected with the position where the inert gas branch pipe extends into the top cover in a sealing mode, and the influence of the inert gas branch pipe on the sealing space inside the top cover can be avoided.
Preferably, a flow deflector is arranged below each inert gas branch pipe extending into the top hood, and the distance between the top of the flow deflector and the top wall of the top hood is greater than the distance between the bottom of the inert gas branch pipe and the top wall of the top hood, so that the inert gas introduced into the top hood from the inert gas branch pipe is dispersed by the flow deflector.
Therefore, the flow guider is arranged right below the inert gas branch pipe, and the inert gas introduced into the top cover from the inert gas branch pipe can be better dispersed by the flow guider.
Preferably, the areas of the roof bricks covered by two adjacent deflectors after the inert gas is dispersed have an overlap.
Therefore, the areas of the top cover bricks covered by the two adjacent flow deflectors after the inert gas is dispersed are overlapped, and one top cover brick is selected in the overlapped area under the general condition, so that the problem of a purging dead zone at the adjacent position is avoided.
Therefore, a plurality of wiring busbars are further arranged in the tin bath, and the axial distance and the vertical distance between the fluid director and the wiring busbars are larger than a set distance.
Therefore, the certain distance is arranged between the fluid director and the wiring busbar, so that the influence of the wiring busbar on the high-speed airflow of the inert gas can be avoided, and the high-pressure inert gas can be dispersed according to a set route and covers the corresponding top cover brick.
Compared with the prior art, the invention has the following advantages:
1. the scheme designs an independent inert gas system, the inert gas purging pressure can be increased to 0.2-0.7Mpa, and the pressure is 5-10 times of the gas pressure between nitrogen and hydrogen gas distribution in the tin bath, so that the acting force during purging of tin bath top cover bricks, top cover brick seams and heating elements can be increased, na salt, K salt and tin compounds attached to all the parts can be cleaned, the concave-convex points on the upper surface of the glass plate are reduced, the drops and the tin adhered to the lower surface, tin spots and adhered substances are generated, the yield is increased while the glass quality is improved, and remarkable economic benefits are brought.
2. The inert gas system of the scheme is characterized in that one end of a special pipeline is connected into an inert gas preparation station, the other end of the special pipeline is connected with an inert gas main pipe, the inert gas preparation station raises the pressure of the inert gas to 0.2-0.7MPa, the inert gas preparation station does not influence the air separation equipment of the original nitrogen preparation station of the tin bath, and meanwhile, the adjustment between the nitrogen and hydrogen distribution of the tin bath can be avoided during purging.
3. Each inert gas branch pipe in the inert gas system is distributed on the whole tin bath top cover, and valves are designed on the inert gas branch pipes and the inert gas branch pipes, so that the inert gas at each position can be independently selected and switched, and the purpose of purging the tin bath top cover bricks and the heating elements at the specified positions is achieved.
4. The inert gas bleeder of this scheme penetrates the overhead guard of molten tin bath, and in the overhead guard was arranged in to the opening of inert gas bleeder, the pipe wall and the overhead guard full weld of inert gas bleeder realized sealed purpose. The inner space of the cover of the tin bath is correspondingly provided with a plurality of fluid deflectors which are positioned under the opening of each inert gas branch pipe, and the inert gas flowing out of the opening of each inert gas branch pipe passes through the flow dividing holes of the fluid deflectors and the flow guiding umbrella caps below to disperse the inert gas and form a gas curtain to cover the surface of the top cover brick in a certain area. After the branch pipe valves of all the inert gas branch pipes are opened, the inert gas in each inert gas branch pipe passes through the corresponding fluid director, and then the inert gas can be uniformly distributed on the whole top cover brick in the space in the tin bath cover, so that the purpose of comprehensively and thoroughly purging the tin bath top cover brick, the top cover brick joints and the heating elements is realized, and the tin bath purging effect is greatly improved.
5. The inert gas of this scheme passes through the divertor and directly acts on top cap brick, and sweeps the mode from the top down, makes Na salt, K salt and the tin compound that adhere to on tin bath top cap brick, top cap brick brickwork joint and heating element drop under the action of gravity from this to be more favorable to sweeping top cap brick, top cap brick brickwork joint and heating element.
6. Because the inert gas is arranged in the top cover of the tin bath, when a main pipe valve, a branch pipe valve and a branch pipe valve in an inert gas system are opened, the pressure in the top cover is instantly increased due to the filling of the inert gas, so that the inert gas passes through gaps of the top cover bricks and gaps between the heating elements and the top cover bricks to shake and purge the gaps, the pressure in the top cover is further instantly increased, and Na salt, K salt and tin compounds on the heating elements are fallen and cleaned due to the instant change of the pressure in the top cover.
7. The inert gas system of the scheme is more flexible in purging the tin bath top cover bricks, the brick joints and the heating elements, can inform a preparation station of inert gas to provide inert gas at any time during process adjustment or other equipment maintenance, and can realize purging and cleaning of the tin bath top cover bricks, the brick joints of the top cover bricks and the heating elements by opening and closing valves in the inert gas system.
8. The inert gas system of the scheme can continuously blow the tin bath top cover bricks, brick joints and the heating elements by continuously opening the inert gas at each part or a certain part of the top cover when necessary, so that the blowing period of the tin bath is prolonged, the normal starting rate of tin bath equipment is increased, and the economic benefit is further improved.
Drawings
FIG. 1 is a cross-sectional view of a float glass tin bath purging device of the present invention taken along the centerline of the tin bath;
FIG. 2 is a schematic perspective view of a float glass tin bath purging device according to the present invention;
FIG. 3 is an enlarged partial schematic view of a float glass tin bath purging device of the present invention;
FIG. 4 is a schematic view of the gas supply of the float glass tin bath purging device of the present invention;
FIG. 5 is a schematic perspective view of a deflector in the tin bath purging device for float glass according to the present invention;
FIG. 6 is a front view of a deflector in the float glass tin bath purging device according to the present invention.
Description of reference numerals: the tin bath comprises a tin bath 1, a top cover 101, bottom bricks 102, top cover bricks 103, brick joints 104, a bath inner space 105, a cover inner space 106, an inert gas main pipe 2, a main pipe valve 201, an inert gas branch pipe 3, a branch pipe valve 301, a protective cover 4, an inert gas airflow covering area 5, an inert gas branch pipe 6, a branch pipe valve 601, a nitrogen-hydrogen mixed gas pipeline 7, a metal hose 8, a fluid director 9, a first umbrella cap 901, a second umbrella cap 902, a third umbrella cap 903, a shunt hole 904, an inert gas airflow 10, a wiring terminal 11, a wiring busbar 12, an in-cover cable 13, an electric heating element 14, molten tin 15, a side wheel 16, a glass ribbon 17 and a fixing rod 18.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without inventive step, are within the scope of protection of the invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Similarly, the singular forms "a," "an," or "the" do not denote a limitation of quantity, but rather denote the presence of at least one, unless the context clearly dictates otherwise. The terms "comprises," "comprising," or the like, mean that the elements or items listed before "comprises" or "comprising" encompass the features, integers, steps, operations, elements, and/or components listed after "comprising" or "comprising," and do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationships may also be changed accordingly.
On a float glass or float ultra-thin electronic glass production line, glass liquid enters a tin bath from a melting furnace to be formed into a glass ribbon, the formed glass ribbon further enters an annealing furnace from the tin bath, the tin bath is a core device for forming the glass liquid into the glass ribbon, as shown in figure 1, the tin bath 1 comprises a top cover 101 and bottom bricks 102, top cover bricks 103 are further arranged in the tin bath 1, the space in the tin bath 1 is divided into a cover inner space 106 and a bath inner space 105 by the top cover bricks 103, the height of the cover inner space 106 is H, the cover inner space 106 is a sealed space consisting of the top cover 101 and the top cover bricks 103, a large number of wiring busbars 12 and cover cables 13 are arranged in the cover inner space 106, one ends of the wiring busbars 12 are wiring terminals 11, the wiring terminals 11 penetrate through the top cover 101 to extend out of the cover, and are isolated and protected by a protective cover 4; the other end of the wiring busbar 12 is connected with a wiring end of an electric heating element 14 through an in-cover cable 13, and the wiring end of the electric heating element penetrates through a prefabricated hole of the top cover brick 103 to be wired in an in-cover space 106; the heating end of the electric heating element 14 radiatively heats the glass ribbon 17 floating on the surface of the molten tin 15 in the groove space 105, thereby facilitating the edge rollers 16 to thin the glass to a target thickness. The molten tin 15 is contained in the bottom brick 102 of the tin bath 1, and the bottom brick 102, the top cover brick 103 and the movable edge seal of the tin bath 1 form a bath space 105.
Still be equipped with nitrogen-hydrogen gas mixture pipeline 7 on tin bath 1's top cover 101, nitrogen-hydrogen gas mixture pipeline 7 is used for letting in the gas mixture of nitrogen gas and hydrogen, and nitrogen-hydrogen gas mixture pipeline 7 passes tin bath 1 top cover 101, lets in protective gas tin bath 1's cover inner space 106 with cable 13 in the protective cover, and protective gas still will further get into the protection tin liquid 15 of cell inner space 105 protection through top cap brick 103 brickwork joint 104 simultaneously and not oxidized.
In the prior art, when cleaning a tin bath 1 top cover brick 103, a heating element and accessory equipment, a nitrogen-hydrogen mixing pipeline is directly used for purging the tin bath 1, when purging, firstly, each area of the tin bath 1 is purged zone by switching on and off each area valve between the nitrogen and hydrogen distribution of the tin bath 1, and the suppressed pressure is used for purging each area of the tin bath 1, the hydrogen of each area needs to be closed firstly in the mode, then the nitrogen of other areas of the tin bath 1 is concentrated to a certain area for purging, the pressure rise of the suppressed pressure mode is limited, the nitrogen flow is increased only instantly, the purging action time is limited, and the longest time is not more than 5 minutes. Meanwhile, other areas in the tin bath 1 cover can only stop air for a short time, otherwise, the temperature in the cover can be sharply increased, so that cables in the cover are burnt out. Secondly, when other areas in the tin bath 1 cover stop gas, the pressure in the cover becomes small, and the deposits are reversely extruded to the deeper part of the expansion joint due to the relatively large pressure in the purging area. Thirdly, stopping the hydrogen gas by pressure-building blowing can accelerate the oxidation pollution of the tin liquor 15, and the method is also insufficient. Finally, the pressure-building purging mode needs to synchronously switch valves of all regions of a nitrogen pipeline between the tin bath 1 and the gas distribution room, is complex to operate, and has certain requirements and influences on a nitrogen station and the nitrogen pipeline. Therefore, the conventional tin bath 1 has many disadvantages.
As shown in the attached drawings 1 to 3, the purging device for the tin bath of the float glass comprises a tin bath 1, an inert gas system and a flow guide assembly, wherein the tin bath 1 comprises a top cover 101 and a bottom brick 102, the top cover brick 103 is arranged on the upper cover of the bottom brick 102, the inert gas system is used for introducing inert gas into the top cover 101, the pressure of the inert gas is not less than 0.2Mpa, and the pressure can be adaptively adjusted according to the space size of the tin bath; the flow guide assembly comprises a plurality of flow deflectors 9 distributed in the top cover 101, each flow deflector 9 is used for dispersing inert gas introduced into the top cover 101, and the plurality of flow deflectors 9 can disperse the inert gas to at least 90% of the area of the top surface of the cover top cover brick 103. Specifically, the method for testing the pressure of the inert gas comprises the following steps: the pressure gauge is used for measurement, and in the specific measurement, the pressure gauge can be used for measurement at any position on the main inert gas pipe, the branch inert gas pipe or the branch inert gas pipe, as long as the pressure of the inert gas measured at any position on the main inert gas pipe, the branch inert gas pipe or the branch inert gas pipe is not less than 0.2 Mpa. In addition, the judgment standard of whether the inert gas covers the top cover brick is as follows: the top surface of the top cover brick 103 is covered when the pressure is above 30Pa by a pressure transmitter or a mechanical pressure gauge.
The working principle of the invention is as follows: when the purging device is used, inert gas is introduced into the top hood 101 through the inert gas system, and when the purging device is used specifically, the inert gas can be nitrogen gas, helium gas, argon gas and other inert gases, wherein the pressure of the inert gas is not less than 0.2Mpa, so that the inert gas introduced into the top hood has sufficient pressure, the high-pressure inert gas introduced into the top hood 101 is further dispersed by the flow deflectors 9 in the flow guiding assembly to form an inert gas flow (as shown by 10 in fig. 1), each flow deflector 9 enables the inert gas to flow along a set track to cover the top cover brick 103 in a set area (as shown by 5 in fig. 2) (i.e., the inert gas flow covering area), and the proper arrangement of the positions of the flow deflectors 9 can enable the flow deflectors 9 to disperse the inert gas and cover at least 90% of the top surface area of the top cover brick 103. When the inert gas is introduced into the cover inner space 106, the gas pressure of the cover inner space 106 is fluctuated, so that the terminal of the electric heating element 14 is directly blown, and the high-pressure nitrogen blown from the top cover rotating gap is vibrated to assist in blowing the heating end of the electric heating element 14 in the groove inner space 105. Meanwhile, under the action of the diversion assembly, the inert gas directly acts on the top cover brick 103 from top to bottom in a sweeping mode, so that Na salt, K salt and tin compounds attached to the top cover brick 103, the brick joints 104 of the top cover brick 103 and the heating element of the tin bath 1 fall under the action of gravity, the cleaning of deposits on the top cover brick 103, the brick joints 104 of the top cover brick 103 and the heating element is realized, the defect problem of the glass belt 17 caused by the fact that the deposits fall into the molten tin 15 or the glass belt 17 is reduced, and the production quality and the yield of the glass belt 17 are effectively improved.
In this embodiment, the inert gas system includes the inert gas main pipe 2, be used for letting in inert gas in the inert gas main pipe 2, be equipped with a plurality of inert gas branch pipes 3 on the overhead guard 101 along the length direction of tin bath 1, every inert gas branch pipe 3 all is responsible for 2 intercommunications with inert gas, be equipped with a plurality of inert gas bleeder pipes 6 along the width direction of tin bath 1 on inert gas branch pipe 3, inert gas bleeder pipe 6 stretches into in the overhead guard to let in inert gas to the cover inner space 106 of tin bath 1 through inert gas bleeder pipe 6.
Thus, the inert gas main pipe 2 is connected to the inert gas preparation station through a special pipeline, the inert gas preparation station provides inert gas with certain pressure, the pressure of the inert gas reaches 0.2-0.7Mpa, when in specific use, the inert gas adopts nitrogen, and the inert gas preparation station is provided with a nitrogen making area of liquid nitrogen used by an inert gas system and a nitrogen making area of air separation equipment used by protective gas, so that the nitrogen making area and the nitrogen making area cannot influence each other when in use (as shown in figure 4). The inert gas entering the main inert gas pipe 2 is further conveyed to the inert gas branch pipes 3 at various positions to realize the purging treatment of different positions in the length direction of the tin bath 1, the inert gas entering the inert gas branch pipes 3 is finally conveyed to the space 106 in the housing through the inert gas branch pipes 6, the plurality of inert gas branch pipes 6 arranged along the width direction of the tin bath 1 on the inert gas branch pipes 3 can realize the effect of conveying the inert gas to different positions in the width direction of the tin bath 1, and the inert gas conveyed to the space 106 in the housing of the tin bath 1 through the inert gas branch pipes 6 is further dispersed and covered on the top cover brick 103 in a set area under the action of the fluid director 9 to finally realize the purging effect of the tin bath 1.
In the present embodiment, the main pipe valve 201 is provided in the main inert gas pipe 2, the branch pipe valve 301 is provided in the inert gas branch pipe 3, and the branch pipe valve 601 is provided in the inert gas branch pipe 6.
Therefore, the valves are respectively arranged on the pipelines of the inert gas system, and the valves at different positions can be opened or closed according to requirements, so that the purging requirements of different positions of the tin bath 1 can be better met.
In the present embodiment, the pressure of the inert gas in the main inert gas pipe 2, and/or the pressure of the inert gas in the branch inert gas pipe 3, and/or the pressure of the inert gas in the branch inert gas pipe 6 are each 0.2 to 0.7MPa.
Thus, the pressure of the inert gas input into the top cover can be ensured, and the purging effect is further ensured. Further, the height of the space inside the enclosure is one of the important factors affecting the pressure of the inert gas, and the pressure of the inert gas in the main inert gas pipe 2, the branch inert gas pipe 3, or the branch inert gas pipe 6 may be adjusted according to the height of the space inside the enclosure, and the pressure may be expressed in relation to the height of the space inside the enclosure as P = a + b H, where: p is pressure, the unit is MPa, H is the height of the space in the cover, the unit is m, a is a coefficient, a is more than 0 and less than or equal to 1, b is a coefficient, and b is more than 0 and less than or equal to 1. However, it should be noted that the determination of the pressure is also influenced by the area of the cap brick 103 and the parameter setting of the deflector 9, which will be described below.
In this embodiment, the branch inert gas pipe 6 is hermetically connected to a position where it extends into the top cover 101. In particular, when the two are connected, the two can be hermetically connected in a full-welding mode.
Thus, the inert gas branch pipe 6 is hermetically connected with the position where the inert gas branch pipe extends into the top cover 101, and the influence of the arrangement of the inert gas branch pipe 6 on the sealing space inside the tin bath 1 can be avoided.
In this embodiment, a flow guiding device 9 is disposed just below each inert gas branch pipe 6 extending into the space 106 in the enclosure of the tin bath 1, and a distance h4 between the top of the flow guiding device 9 and the top wall of the top enclosure 101 is greater than a distance between the bottom of the inert gas branch pipe 6 and the top wall of the top enclosure 101, so as to disperse the inert gas introduced into the space 106 in the enclosure of the tin bath 1 through the flow guiding device 9.
Thus, the flow guide 9 is arranged right below the inert gas branch pipe 6, and the inert gas introduced into the space 106 in the housing of the tin bath 1 from the inert gas branch pipe 6 can be better dispersed by the flow guide 9.
As shown in fig. 5 and 6, in the present embodiment, the fluid director 9 is fixedly attached to the inner wall of the top cover 101 by means of fixing rods 18.
In this embodiment, the flow guider 9 includes at least one flow guiding umbrella cap, one end of the flow guiding umbrella cap is a radial opening, and the other end is communicated with the inert gas system, when in use, the flow guiding umbrella cap may be designed into a standard hollow cone with a bottom opening parallel to the horizontal plane, or may be designed into a non-standard hollow cone with a bottom opening not parallel to the horizontal plane, the flow guiding umbrella cap is provided with a plurality of flow splitting holes 904, a channel is provided in the flow guiding umbrella cap, and the inert gas input by the inert gas system enters from one end of the flow guiding umbrella cap and flows out from the flow splitting holes 904.
Therefore, when the inert gas is input into the top cover 101, one end of the flow guide umbrella cap communicated with the inert gas system is a radial opening, so that the inert gas can be dispersed at a certain angle, and meanwhile, the design of the shunting holes 904 on the flow guide device 9 can also ensure that the inert gas flows downwards in a dispersing way through the shunting holes, so that the inert gas can be more uniformly dispersed and covered on the top cover bricks 103.
In this embodiment, the deflector 9 includes a first diversion umbrella cap 901, a second diversion umbrella cap 902, and a third diversion umbrella cap 903, the first diversion umbrella cap 901 covers the second diversion umbrella cap 902, the second diversion umbrella cap 902 covers the third diversion umbrella cap 903, one end of the first diversion umbrella cap 901 is communicated with the inert gas system, and the inert gas is delivered to the second diversion umbrella cap 902 and the third diversion umbrella cap 903 through the diversion hole 904. The cross section of the first flow guide umbrella cap 901 has a first base angle, the first base angle is a right base angle on the cross section of the first flow guide umbrella cap 901 and is alpha 1, the cross section of the second flow guide umbrella cap 902 has a second base angle, the second base angle is a right base angle on the cross section of the second flow guide umbrella cap 902 and is alpha 2, the cross section of the third flow guide umbrella cap 903 has a third base angle, the third base angle is a right base angle on the cross section of the third flow guide umbrella cap 903 and is alpha 3, and alpha 1 is greater than 0 degrees and is greater than alpha 2 and is greater than alpha 3 and is less than 90 degrees.
Thus, the high-speed bundled gas flow from the inert gas branch pipe 6 passes through the flow guiding umbrella caps with certain angles (alpha 1, alpha 2, alpha 3) in sequence, so that the inert gas is gradually dispersed according to certain angles, and the bundled inert gas can be uniformly dispersed and covered on the top cover brick 103.
In this embodiment, a plurality of diversion holes 904 are circumferentially distributed on the first diversion umbrella cap 901, the second diversion umbrella cap 902 and the third diversion umbrella cap 903, and the number of the diversion holes 904 on the first diversion umbrella cap 901, the second diversion umbrella cap 902 and the third diversion umbrella cap 903 is greater than or equal to 4.
In this way, a more uniform dispersion of the inert gas may be achieved by the plurality of diverter holes 904.
In this embodiment, the diversion holes 904 on the first diversion umbrella cap 901, the diversion holes 904 on the second diversion umbrella cap 902, and the diversion holes 904 on the third diversion umbrella cap 903 are sequentially arranged in a staggered manner in the circumferential direction.
Like this, the reposition of redundant personnel hole 904 on each water conservancy diversion umbrella hat is in the dislocation set in proper order in circumference to in with the better water conservancy diversion umbrella hat of leading to lower floor of inert gas on the water conservancy diversion umbrella hat of upper strata, thereby improve the drainage effect to inert gas.
In this embodiment, the maximum length of the opening of the first guide umbrella cap 901 in the radial direction is D1, the maximum length of the opening of the second guide umbrella cap 902 in the radial direction is D2, and the maximum length of the opening of the third guide umbrella cap 903 in the radial direction is D3, and D1 < D2 < D3 is satisfied.
Therefore, the maximum length of the openings of the diversion umbrella caps in the radial direction is sequentially increased from top to bottom, so that the high-speed bundled gas flow of the inert gas can be gradually dispersed, and the inert gas can uniformly and effectively cover the roof brick 103.
In this embodiment, the vertical distance from the end of the cross section of the first diversion umbrella cap 901 close to the inert gas system to the end far away from the inert gas system is h1, the vertical distance from the end of the cross section of the second diversion umbrella cap 902 close to the inert gas system to the end far away from the inert gas system is h2, the vertical distance from the end of the cross section of the third diversion umbrella cap 903 close to the inert gas system to the end far away from the inert gas system is h3, and h1 < h2 < h3 is satisfied.
Thus, the vertical distance from the end of the cross section of each flow guide umbrella cap close to the inert gas system to the end far away from the inert gas system is continuously increased, so that the inert gas is continuously drained downwards and dispersed under the action of each flow guide umbrella cap, and the inert gas can cover all areas of the flow guider 9 corresponding to the top cover brick 103.
In this embodiment, a plurality of diversion holes 904 are circumferentially distributed on the diversion umbrella cap, and the aperture of the diversion holes 904 is 20% -150% of the inner diameter of the inert gas branch pipe 6. Specifically, the holes can be omitted when the aperture of the diversion holes 904 is selected to be large, according to the actual situation on site, if the amount of inert gas needs to be increased in a certain direction, the diversion holes 904 at the position can be considered to be enlarged, and if the aperture of the diversion holes 904 is small, a plurality of diversion holes 904 need to be opened.
In this way, the shunting holes 904 can enable the high-pressure inert gas to pass through so as to move downwards to the upper part of the top cover brick 103 of the corresponding area, and the plurality of circumferentially distributed shunting holes 904 can achieve a more uniform shunting effect on the high-pressure inert gas.
In the embodiment, the areas of the roof bricks 103 covered by two adjacent deflectors 9 after the high-pressure inert gas is dispersed have an overlap.
In this way, the areas of the top cover bricks 103 covered by two adjacent flow deflectors 9 after the high-pressure inert gas is dispersed have an overlap, and one top cover brick 103 is generally selected in the overlapping area, so that the problem of purging dead zones at adjacent positions is avoided.
In this embodiment, a plurality of wiring busbars 12 are further arranged in the tin bath 1, and both axial and vertical distances between the fluid director 9 and the wiring busbars 12 are greater than a set distance. When the special air flow guiding device is used, the axial vertical reserved safety distance between the air deflector 9 and the wiring busbar 12 is not less than 50mm, if the air flow guiding device cannot be opened, the opening position and the opening size of the shunting holes 904 on each air guiding umbrella cap can be adjusted according to specific conditions, an irregular air guiding umbrella cap can be added if necessary, and therefore high-pressure inert gas air flow can be enabled to cover all areas of the air deflector 9 corresponding to the top cover brick 103.
Therefore, a certain distance is arranged between the fluid director 9 and the wiring busbar 12, so that the influence of the wiring busbar 12 on the high-speed gas flow of the high-pressure inert gas can be avoided, and the high-pressure inert gas can be dispersed according to a set route and cover the corresponding top cover brick 103.
Two specific examples are specifically illustrated below:
the first embodiment is as follows:
in a float glass production line, from an inlet end of a tin bath 1 to an outlet end of the tin bath 1, the tin bath 1 is transversely divided into n shellfish along a longitudinal central line of the tin bath 1, the shellfish is a tin bath segmentation unit, the n value is 12, the length of each shellfish is 2700mm, the inner width of the tin bath 1 corresponding to each shellfish is L, and the L value is 5400mm. Arranging an inert gas branch pipe 3 at the position of the transverse central line of the top cover 101 corresponding to each shellfish, arranging an inert gas branch pipe 6 at the intersection point of the transverse central line of the top cover 101 corresponding to each shellfish and the longitudinal central line of the tank, symmetrically designing 2 pairs of inert gas branch pipes 6 on the inert gas branch pipes 6 by taking the inert gas branch pipes 6 as the center, arranging 5 inert gas branch pipes 6 at the position of the transverse central line of the shellfish, wherein the distance between every two inert gas branch pipes is L/5, and the value is 1080mm. One end of the inert gas branch pipe 6 is connected to the inert gas branch pipe 3, the metal hose 8, and the inert gas main pipe 2 in sequence, and a branch valve 601, a branch valve 301, and a main pipe valve 201 are provided on the inert gas branch pipe 6, the inert gas branch pipe 3, and the inert gas main pipe 2, respectively. The main inert gas pipe 2 of the tin bath 1 is connected to an inert gas preparation station through a special pipeline, and the inert gas preparation station adopts liquid nitrogen to provide high-pressure inert gas with the pressure of 0.4 +/-0.1 MPa. The other end opening of the inert gas branch pipe 6 is arranged in the cover inner space 106 of the top cover 101 of the tin bath 1, and the pipe wall of the inert gas branch pipe 6 is fully welded with the top cover 101, thereby realizing the purpose of sealing. The deflectors 9 are correspondingly arranged in the cover inner space 106, and each deflector 9 is positioned right below the opening of the corresponding inert gas branch pipe 6 and fixed on the inner wall of the top cover 101 of the tin bath 1 by a fixing rod 18. The height H of the space 106 in the cover is 900mm, the distance between the conical top of the fluid director 9 and the inner surface of the top cover 101 is 100mm, 3 diversion umbrella caps are designed on the fluid director 9, and a first diversion umbrella cap 901, a second diversion umbrella cap 902 and a third diversion umbrella cap 903 are sequentially designed on the fluid director 9 from top to bottom; the corresponding heights of the umbrella caps are that the height (h 1) of a first flow guide umbrella cap 901 is 120mm, the height (h 2) of a second flow guide umbrella cap 902 is 260mm, and the height (h 3) of a third flow guide umbrella cap 903 is 390mm in sequence. The conicity corresponding to the umbrella cap is that the conicity (alpha 1) of the first diversion umbrella cap 901 is 55.5 degrees, the conicity (alpha 2) of the second diversion umbrella cap 902 is 73 degrees, and the conicity (alpha 3) of the third diversion umbrella cap 903 is 86 degrees in sequence. The diameters of the corresponding bottom circles of the umbrella caps are 165mm for the diameter (D1) of the bottom circle of the first diversion umbrella cap 901, 159mm for the diameter (D2) of the bottom circle of the second diversion umbrella cap 902 and 55mm for the diameter (D3) of the bottom circle of the third diversion umbrella cap 903 in sequence. The diameter of a diversion hole 904 at the vertex of a cone of a fluid director 9 is 8mm, 12 diversion holes 904 are uniformly designed on a first diversion umbrella cap 901, the aperture is 25mm, 8 diversion holes 904 are uniformly designed on a second diversion umbrella cap 902 (413), the aperture is 20mm, 8 diversion holes 904 are uniformly designed on a third diversion umbrella cap 903, and the aperture is 25mm; the inert gas manifold 6 has an inner diameter of 32mm. In the actual installation process, if the fluid director 9 collides with the internal wiring busbar 12 at the spatial position, the fluid director 9 is avoided by adjusting the high-pressure inert gas branch pipe 6 and/or adjusting the shape or size of the fluid director 9.
When purging, informing an inert gas preparation station of supplying high-pressure inert gas, when the pressure value of a pressure gauge of a pipeline on site reaches 0.4 +/-0.1 MPa, opening a main pipe valve 201, opening a first shell branch pipe valve 301 of a top cover 101 of a tin bath 1, then opening a branch pipe valve 601301 corresponding to an inert gas branch pipe 3, purging with the high-pressure inert gas for 5 minutes, closing the first shell branch pipe valve 301, and then sequentially and respectively opening a 2 nd shell branch pipe valve 301, a 3 rd shell branch pipe valve 301, and a 12 th shell branch pipe valve 301 according to the above methods. The purpose of completely purging the top cover brick 103, the brick joint 104 and the heating element of the tin bath 1 is achieved.
Example two:
in a float glass production line, from an inlet end of a tin bath 1 to an outlet end of the tin bath 1, the tin bath 1 is transversely divided into n shells along a longitudinal central line of the tin bath 1, the n value is 13, the length of each shell is 2700mm, the inner width of each shell corresponding to the tin bath 1 is L, and the L value is 5600mm. Arranging an inert gas branch pipe 3 at the position of the transverse central line of the top cover 101 corresponding to each shellfish, arranging an inert gas branch pipe 6 at the intersection point of the transverse central line of the top cover 101 corresponding to each shellfish and the longitudinal central line of the tank, symmetrically designing 2 pairs of inert gas branch pipes 6 on the inert gas branch pipes 6 by taking the inert gas branch pipes 6 as the center, arranging 3 inert gas branch pipes 6 at the position of the transverse central line of the shellfish, wherein the distance between every two inert gas branch pipes is L/3, and the value is 1080mm. One end of the inert gas branch pipe 6 is connected to the inert gas branch pipe 3, the metal hose 8, and the inert gas main pipe 2 in sequence, and a branch valve 601, a branch valve 301, and a main pipe valve 201 are provided on the inert gas branch pipe 6, the inert gas branch pipe 3, and the inert gas main pipe 2, respectively. The main inert gas pipe 2 of the tin bath 1 is connected to an inert gas preparation station through a special pipeline, and the inert gas preparation station adopts liquid nitrogen to provide high-pressure inert gas with the pressure of 0.4 +/-0.1 MPa. The other end opening of the inert gas branch pipe 6 is arranged in the space 106 in the top cover 101 of the tin bath 1, and the pipe wall of the inert gas branch pipe 6 is fully welded with the top cover 101, thereby realizing the purpose of sealing. The deflectors 9 are correspondingly arranged in the cover inner space 106, and each deflector 9 is positioned right below the opening of the corresponding inert gas branch pipe 6 and fixed on the inner wall of the top cover 101 of the tin bath 1 by a fixing rod 18. The height H of the space 106 in the cover is 900mm, the distance between the conical top of the fluid director 9 and the inner surface of the top cover 101 is 80mm, 3 diversion umbrella caps are designed on the fluid director 9, and a first diversion umbrella cap 901, a second diversion umbrella cap 902 and a third diversion umbrella cap 903 are sequentially designed on the fluid director 9 from top to bottom; the corresponding heights of the umbrella caps are that the height (h 1) of the first diversion umbrella cap 901 is 120mm, the height (h 2) of the second diversion umbrella cap 902 is 300mm, and the height (h 3) of the third diversion umbrella cap 903 is 420mm in sequence. The conicity corresponding to the umbrella cap is that the conicity (alpha 1) of the first diversion umbrella cap 901 is 41 degrees, the conicity (alpha 2) of the second diversion umbrella cap 902 is 60.5 degrees, and the conicity (alpha 3) of the third diversion umbrella cap 903 is 66.5 degrees in sequence. The diameters of the corresponding bottom circles of the umbrella caps are that the diameter (D1) of the bottom circle of the first diversion umbrella cap 901 is 276mm, the diameter (D2) of the bottom circle of the second diversion umbrella cap 902 is 340mm, and the diameter (D3) of the bottom circle of the third diversion umbrella cap 903 is 365mm. The diameter of a diversion hole 904 at the conical top of the fluid director 9 is 10mm, 16 diversion holes 904 are uniformly designed on a first diversion umbrella cap 901, the aperture is 25mm, 12 diversion holes 904 are uniformly designed on a second diversion umbrella cap 902, the aperture is 25mm, 8 diversion holes 904 are uniformly designed on a third diversion umbrella cap 903, and the aperture is 25mm; the inner diameter of the inert gas branch pipe 6 was 40mm. In the actual installation process, if the fluid director 9 collides with the internal wiring busbar 12 at the spatial position, the fluid director 9 is avoided by adjusting the high-pressure inert gas branch pipe 6 and/or adjusting the shape or size of the fluid director 9.
When purging, the inert gas preparation station is informed of high-pressure inert gas, when the pressure value of a pressure gauge of a pipeline on site reaches 0.4 +/-0.1 MPa, the main pipe valve 201 is opened, the first shell branch pipe valve 301 of the top cover 101 of the tin bath 1 is opened, the branch pipe valve 601301 corresponding to the inert gas branch pipe 3 is opened, the high-pressure inert gas is purged for 5 minutes, the first shell branch pipe valve 301 is closed, and the 2 nd shell branch pipe valve, the 3 rd shell branch pipe valve and the 13 th shell branch pipe valve 301 are sequentially opened according to the method. The purpose of completely purging the top cover brick 103, the brick joint 104 and the heating element of the tin bath 1 is achieved.
Compared with the prior art, the scheme has the advantages that through the design of the independent high-pressure inert gas system, the inert gas blowing pressure can be increased to 0.2-0.7Mpa, and the pressure is 5 times to 10 times of the gas pressure between the nitrogen and hydrogen gas distribution chambers of the tin bath 1, so that the acting force during blowing the top cover brick 103, the brick joint 104 of the top cover brick 103 and the heating element of the tin bath 1 can be increased, the Na salt, the K salt and the tin compound attached to all the parts can be cleaned, the generation of the concave-convex points on the upper surface of the glass plate, the generation of the dripping objects, the tin spots on the lower surface, the tin spots and the adhering objects can be reduced, the yield can be increased while the glass quality is improved, and the remarkable economic benefit can be brought.
The high-pressure inert gas system of this scheme, insert the inert gas preparation station by the one end of dedicated line, the other end is responsible for 2 with inert gas and links to each other, high-pressure inert gas adopts the liquid nitrogen air feed by the inert gas preparation station, and improve inert gas pressure to 0.2-0.7Mpa, and do not cause the influence to the air separation equipment of nitrogen gas preparation station, can avoid the adjustment between tin bath 1 nitrogen gas and hydrogen distribution simultaneously again in sweeping, entire system is safer and more reliable, and simple structure, the operation is convenient, high efficiency. Each inert gas branch pipe 6 in the high-pressure inert gas system is distributed on the whole tin bath 1 top cover 101, valves are arranged on the inert gas branch pipes 3 and the inert gas branch pipes 6, so that the high-pressure inert gas at each position can be independently selected to be switched on and switched off, and the purpose of purging the tin bath 1 top cover brick 103 and the heating element at the specified position is achieved.
The branch inert gas pipe 6 of this scheme penetrates the overhead guard 101 of molten tin bath 1, and in the overhead guard 101 was arranged in to the opening of branch inert gas pipe 6, the pipe wall of branch inert gas pipe 6 and overhead guard 101 full-welded realized sealed purpose. A plurality of flow deflectors 9 are correspondingly arranged in the cover inner space 106 of the tin bath 1, the flow deflectors 9 are positioned right below the opening of each inert gas branch pipe 6, and high-pressure inert gas flowing out of the opening of each inert gas branch pipe 6 passes through the flow dividing holes 904 of the flow deflectors 9 below and the flow guiding umbrella caps to disperse the high-pressure inert gas and cover the high-pressure inert gas on the surface of the top cover brick 103 in a certain area. After the branch pipe valves 601301 of all the inert gas branch pipes 6 are opened, the high-pressure inert gas in each inert gas branch pipe 6 passes through the corresponding fluid director 9, and then can be uniformly distributed on the whole top cover brick 103 of the space 106 in the cover of the tin bath 1, so that the purpose of comprehensively and thoroughly purging the top cover brick 103 of the tin bath 1, the brick joints 104 of the top cover brick 103 and the heating elements is achieved, and the purging effect of the tin bath 1 is greatly improved.
The high-pressure inert gas directly acts on the top cover brick 103 through the fluid director 9, and the purging mode is from top to bottom, so that Na salt, K salt and tin compound attached to the top cover brick 103, the brick joints 104 of the top cover brick 103 and the heating elements of the tin bath 1 fall off under the action of gravity, and purging of the top cover brick 103, the brick joints 104 of the top cover brick 103 and the heating elements is facilitated. Since the high-pressure inert gas is placed in the space 106 in the housing of the tin bath 1, when the main pipe valve 201, the branch pipe valve 301 and the branch pipe valve 601301 in the high-pressure inert gas system are opened, the pressure in the space 106 in the housing of the tin bath 1 is instantaneously increased due to the filling of the high-pressure inert gas, so that the high-pressure inert gas passes through the gap between the top cover brick 103 and the gap between the heating element and the top cover brick 103 to perform oscillation purging on each gap, and further the pressure in the space 105 in the tin bath 1 is instantaneously increased, and Na salts, K salts and tin compounds on the heating element in the space 105 in the tin bath are fallen and cleaned due to the instantaneous change of the pressure in the space 105 in the tin bath. The high-pressure inert gas system of the scheme is more flexible in purging the tin bath 1 top cover bricks 103, the brick joints 104 and the heating elements, can inform a nitrogen station preparation station to provide high-pressure inert gas at any time during process adjustment or other equipment maintenance, and can realize purging and cleaning of the tin bath 1 top cover bricks 103, the brick joints 104 and the heating elements by opening and closing valves in the high-pressure inert gas system. The high-pressure inert gas system of the scheme can continuously blow the top cover brick 103, the brick joint 104 and the heating element of the tin bath 1 by continuously opening the high-pressure inert gas at each part or a certain part of the top cover 101 when necessary, thereby prolonging the blowing period of the tin bath 1, increasing the normal operation rate of the tin bath 1 equipment and further improving the economic benefit.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all that should be covered by the claims of the present invention.
Claims (15)
1. A float glass tin bath purging device is characterized by comprising a tin bath, an inert gas system and a flow guide assembly, wherein the tin bath comprises a top cover and a bottom brick, a top cover brick is arranged on an upper cover of the bottom brick, and the inert gas system is used for introducing inert gas into the top cover; the water conservancy diversion subassembly is including distributing a plurality of diverters in the overhead guard, a plurality of the diverters can be with inert gas dispersion and form the gas curtain and cover at least 90% of the top surface area of top cap brick.
2. The float glass tin bath purging device as claimed in claim 1, wherein the fluid director is connected to an inner wall of the top cover, the fluid director comprises a diversion umbrella cap, one end of the diversion umbrella cap is provided with a radial opening, the other end of the diversion umbrella cap is communicated with the inert gas system, the diversion umbrella cap is provided with a plurality of diversion holes, a channel is arranged in the diversion umbrella cap, and inert gas input by the inert gas system enters the channel from one end of the diversion umbrella cap and flows out of the diversion holes.
3. The float glass tin bath blowing device according to claim 2, wherein the guide umbrella caps include a first guide umbrella cap, a second guide umbrella cap, and a third guide umbrella cap, the first guide umbrella cap is covered on the second guide umbrella cap, the second guide umbrella cap is covered on the third guide umbrella cap, one end of the first guide umbrella cap is communicated with the inert gas system, and inert gas is delivered to the second guide umbrella cap and the third guide umbrella cap through the diversion holes.
4. The float glass tin bath purging device as claimed in claim 3, wherein a plurality of shunting holes are circumferentially distributed on each of the first, second and third guiding umbrella caps, and the number of the shunting holes on each of the first, second and third guiding umbrella caps is greater than or equal to 4.
5. The float glass tin bath purging device as claimed in claim 4, wherein the diversion holes on the first diversion umbrella cap, the diversion holes on the second diversion umbrella cap and the diversion holes on the third diversion umbrella cap are sequentially arranged in a staggered manner in the circumferential direction.
6. A float glass tin bath purging device as claimed in claim 3, wherein the cross-section of the first guide umbrella cap has a first base angle at an angle α 1, the cross-section of the second guide umbrella cap has a second base angle at an angle α 2, and the cross-section of the third guide umbrella cap has a third base angle at an angle α 3, and the angle α 1 < α 2 < α 3 < 90 ° is satisfied.
7. A float glass tin bath blowing device as claimed in claim 3, wherein the maximum radial length of the opening of the first guide umbrella cap is D1, the maximum radial length of the opening of the second guide umbrella cap is D2, the maximum radial length of the opening of the third guide umbrella cap is D3, and D1 < D2 < D3 is satisfied.
8. The float glass tin bath blowing device according to claim 3, wherein a vertical distance from one end of the cross section of the first guide umbrella cap close to the inert gas system to one end far away from the inert gas system is h1, a vertical distance from one end of the cross section of the second guide umbrella cap close to the inert gas system to one end far away from the inert gas system is h2, a vertical distance from one end of the cross section of the third guide umbrella cap close to the inert gas system to one end far away from the inert gas system is h3, and h1 < h2 < h3 is satisfied.
9. A float glass tin bath blowing device as claimed in claim 2, wherein the inert gas system includes a main inert gas pipe for introducing inert gas, a plurality of branch inert gas pipes are provided on the top cover along the length direction of the tin bath, each branch inert gas pipe is communicated with the main inert gas pipe, a plurality of branch inert gas pipes are provided on the branch inert gas pipes along the width direction of the tin bath, the branch inert gas pipes extend into the top cover so as to introduce inert gas into the top cover through the branch inert gas pipes.
10. The float glass tin bath purging device as claimed in claim 9, wherein a plurality of the branch holes are circumferentially distributed on the flow guiding umbrella cap, and the aperture of the branch holes is 20% -150% of the inner diameter of the inert gas branch pipe.
11. A float glass bath purging device as claimed in claim 9, wherein a main pipe valve is provided on the main inert gas pipe, a branch pipe valve is provided on each of the branch inert gas pipes, and a branch pipe valve is provided on each of the branch inert gas pipes.
12. A float glass tin bath purging device as claimed in claim 9, wherein the pressure of the inert gas in the main inert gas pipe, and/or the pressure of the inert gas in the branch inert gas pipe are each 0.2Mpa to 0.7Mpa.
13. A float glass bath purge apparatus as claimed in claim 9, wherein the branch inert gas line is sealingly connected to the top hood at a location where it extends into the top hood.
14. A float glass tin bath blowing apparatus as claimed in claim 9, wherein a flow guide is provided directly below each of the branch inert gas pipes extending into the top cowl, and a distance between a top of the flow guide and a top wall of the top cowl is greater than a distance between a bottom of the branch inert gas pipe and the top wall of the top cowl, so that the inert gas introduced into the top cowl through the branch inert gas pipe is dispersed by the flow guide.
15. A float glass tin bath purge apparatus as claimed in claim 1, wherein there is overlap in the area of the roof bricks covered by two adjacent deflectors after dispersion of the inert gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211718662.3A CN115771995A (en) | 2022-12-30 | 2022-12-30 | Float glass tin bath purging device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211718662.3A CN115771995A (en) | 2022-12-30 | 2022-12-30 | Float glass tin bath purging device |
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| CN115771995A true CN115771995A (en) | 2023-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211718662.3A Pending CN115771995A (en) | 2022-12-30 | 2022-12-30 | Float glass tin bath purging device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118145877A (en) * | 2024-05-13 | 2024-06-07 | 河北金宏阳太阳能科技股份有限公司 | Float glass tin bath purging device |
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