CN106673405A - High-temperature step-by-step melting method adopting submerged heating for molten glass - Google Patents
High-temperature step-by-step melting method adopting submerged heating for molten glass Download PDFInfo
- Publication number
- CN106673405A CN106673405A CN201710044501.3A CN201710044501A CN106673405A CN 106673405 A CN106673405 A CN 106673405A CN 201710044501 A CN201710044501 A CN 201710044501A CN 106673405 A CN106673405 A CN 106673405A
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- CN
- China
- Prior art keywords
- vitreous humour
- glass
- pond
- gas
- melting
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/235—Heating the glass
- C03B5/2356—Submerged heating, e.g. by using heat pipes, hot gas or submerged combustion burners
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B3/00—Charging the melting furnaces
- C03B3/02—Charging the melting furnaces combined with preheating, premelting or pretreating the glass-making ingredients, pellets or cullet
- C03B3/023—Preheating
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/18—Stirring devices; Homogenisation
- C03B5/193—Stirring devices; Homogenisation using gas, e.g. bubblers
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/225—Refining
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Glass Melting And Manufacturing (AREA)
- Furnace Details (AREA)
Abstract
A high-temperature step-by-step melting method adopting submerged heating for molten glass is characterized in that a glass melting tank is divided into a front part and a rear part, wherein upper spaces of the two parts are isolated by a partition wall, and the molten glass in lower spaces of the two parts is communicated; a mixed bubbling submerged combustion method or plasma submerged heating method is adopted at the bottom of the front part of the glass melting tank for spraying or blowing high flow of gas for heating the molten glass into the molten glass, and the molten glass is molten and homogenized in a fierce bubbling and tumbling state; a low-intensity mixed bubbling submerged combustion method, a plasma submerged heating method or a traditional glass bubbling method is adopted at the bottom of the rear part of the glass melting tank for blowing gas mainly used for clarifying the molten glass into the molten glass, so that the molten glass, molten and homogenized in the front part of the glass melting tank but still carrying a large quantity of small bubbles, is carried by massive rising bubbles out of a molten glass surface to be clarified, and qualified molten glass for forming is produced.
Description
Technical field
Process of glass, particularly glass melting process.
Background technology
At present, surface heating means are adopted with fuel continuous melting vitreous humour.It has the shortcomings that several to be difficult to overcome：
One is that the thermal efficiency is relatively low, and thermal losses is serious；Two is that melting rate is relatively low；Three is fuel gas temperature height, the flow velocity of melting tank combustion space
Greatly, it is very fast to kiln refractory corrosion, reduce kiln service life.For save energy, reduce discharge and reduces cost
And improve kiln service life, all replace surface heating exploring more effective heating means both at home and abroad, for example submerged combustion and
Heated by electrodes.
But, so far, so-called submerged combustion is gaseous fuel combustion device to be inserted in kiln from kiln bottom, makes the useless of burning
Gas is injected directly in the vitreous humour of molten bath with high temperature and high speed, stirs vitreous humour, and most of heat is passed to into vitreous humour and cooperation
Material, makes frit melt rapidly.
This method can not only be such that the heat of burning gases is fully absorbed by vitreous humour, and heat loss is little, and melting rate is high, energy-conservation
Effect is very notable（The melting rate of submerged combustion method is introduced up to 9 ~ 10 ton/square metre days, per kilogram vitreous humour heat by foreign countries
Consumption is below 1000 kilocalories）.And because high-temperature gas is seethed, stirring action is played to vitreous humour, make the vitreous humour in pond more equal
It is even.Again because the EGT for leaving vitreous humour is basic identical with the temperature of Watch glass liquid in molten bath, thus reduce melting furnaces
The temperature in space, extends the service life of kiln.
Submerged combustion method has many advantages, therefore all successively carries out including the U.S. including China, day, method, E Deng states
In-depth study and test, but up to the present do not succeed in large-scale industrial application.
Its reason is that the method for this traditional submerged combustion has insoluble problem：1st, clear up problems：To
When combustion gas and air mixture are sprayed in vitreous humour (combustion product), the operating condition of nozzle is relatively difficult, only mixed gas
When consumption is substantially exceeded with air or steam bubble, founding just can be normally carried out.Because the fierce bubbling of vitreous humour is seethed, glass is made
Glass liquid show bubble, the minute gas field trash of itself significantly increases, therefore, make vitreous humour clarification highly difficult.2nd, fuel is asked
Topic：In the melt occlusion or the blub composition that is mingled with mainly do not participate in the inactive gas of reaction, that is, fuel combustion
The nitrogen discharged in journey, such as：It is nitrogenous with the combustion product produced by the submerged combustion nozzle of the air gas mixture of natural gas one
Amount is more than 70%, and general combustion method then allows nitrogen content in combustion product less than 30%, for plate glass, then
Preferably no more than 10% (weight).Therefore, this is also the main cause more than air inclusions.Can effectively be solved with pure oxygen burning technique
Certainly above-mentioned two problems, but the problem brought are that flame temperature is too high, and nozzle deteriorates too fast, cannot compensate again or change. 3、
Combustor problem：Due to burner be submergence in the melt, its quality, riding position and operational control are all required than ever
Strictly, otherwise, once burning is broken down, make vitreous humour enter its interior solidification of people, then can not be continuing with.In addition, working as vitreous humour
When reaching certain depth, not enough, flame does not then enter vitreous humour to the impulse force of nozzle, and from the side refractory material sprays.Qinhuangdao glass
Glass academy just ran in test such case.Reducing nozzle diameter can solve the above problems, but can cause the combustion heat
The not enough problem of amount.4th, refractories：Because vitreous humour is acutely seethed in kiln, superstructure space can be sputtered
The vitreous humour for coming is washed away, and general silica brick and chrome brick does not adapt to the needs of this melting furnaces.When in the multiple burnings of bottom of pond setting
During nozzle, can also weaken the intensity of refractory material.In addition, the natural gas that burns such as in liquation is (to feed the 7- of total amount in kiln
10%), greatly reinforce can heat exchange.The amount of natural gas directly burnt in melting furnaces is improved too much, and refractory material is tight by erosion
Weight.5th, the fluctuation of viscosity of glass metal, bleed pressure and flow, the impact to mixture pressure and spray speed is very big so as to be difficult to
Long term constant it is maintained in vitreous humour and burns, easily causes de- fire, tempering or combustion gas to go out the phenomenon on metal level firing top.
6th, the most key problem is：Due to being limited by material, burner (especially bocca) is easily lost, the life-span is shorter, and
Both cannot compensate or be difficult to change.So while through long-term research and test, being but difficult to put into practical application.So, from
Last century the fifties start to the eighties, occur the report in terms of glass submerged combustion never again afterwards.
And the problem that heated by electrodes is present is：Melting rate is low；Heating surface (area) (HS is limited；Electrode is expensive and changes difficult and oxidizable；Need elder generation
With other mode of heatings by glass melting into after liquid, can electrified regulation, increased equipment and process costs.Therefore.Mesh
The glass electric melting of front heated by electrodes is only used for the production of the small-scale product such as high-boron-silicon glass, opal glass.
To solve the above problems, patent application：The mixed bubble submerged combustion of low-intensity（Application number 2016100543562）With etc.
The method that fusion cast glass is heated in ion submergence（Application number 201611179575X）Propose to the heating of vitreous humour large area bubbling
Technical scheme.The problems referred to above that it can exist with effectively solving submerged combustion, but new problem can be brought：Such as bubbling amount is too small
When, institute's heating load is not enough, causes melting rate relatively low, or even is difficult to melt；The foam of vitreous humour can be caused when bubbling amount is excessive again
Change and be difficult to clarify.
The content of the invention
For this purpose, the invention provides a kind of vitreous humour submergence heating high temperature fractional melting method, is characterized in that：By glass melting
Pond is divided into before and after two parts, is therebetween isolated upper space with obstruct wall, and vitreous humour is only communicated in its underpart；In forward part glass
The bottom of melting tank is big by the gas for being used to heat vitreous humour using above-mentioned mixed bubble submerged combustion or plasma immersion heating
Flow sprays people or blasts in vitreous humour, vitreous humour is melted and homogenizing under violent bubbling tumbling state；Part glass behind
The bottom of glass melting tank bubble submerged combustion or plasma immersion heating or traditional glass bubbling are mixed using above-mentioned low-intensity
Method, is blasted the gas for being mainly used in fining glass liquid in vitreous humour in bubbling mode so that in forward part glass melting pond
It is melted with homogenizing but still the bubble that risen in a large number of the vitreous humour with a large amount of micro-bubbles is taken metal level out of and clarified；
The vitreous humour with homogenizing is not completely melt in forward part glass melting pond, in rear part glass melting pond its fusing is continued to complete
And homogenization process；The vitreous humour fusing mode of the present invention, is put into using the fusing mode of blast furnace shaft furnace formula, i.e. raw material by top,
Hot gas are entered by raw material bottom, and flue gas is excluded Jing after with raw material layer heat exchange cooling from shaft furnace top；The vitreous humour of fusing is certainly
So sink in forward part glass melting pond below, be then fed in rear part glass melting pond further fusing, homogenizing and
Clarification, so as to produce the grade glass liquid for molding.
The glass liquid heating temperature of conventional surface heating means is not higher than 1600 DEG C, the vitreous humour of traditional electrode heating means
Heating-up temperature is not higher than 1700 DEG C；The glass liquid heating temperature of glass melting pond of the present invention forward part（That is the temperature of hot gas）
Control more than 2000 DEG C, so as to while vitreous humour is by rapid melting, making partial raw gas be turned to clarifier and use.
Above-mentioned hot gas are the high-temperature steam of hydrogen and oxygen mixed combustion in vitreous humour；Or natural gas and oxygen or
With the flue gas of air mixed combustion in vitreous humour；Or the high temperature plasma gas such as air, the vapor being ionized.
Because the present invention is that high temperature melting and bubbling are clarified, therefore without the need for being intentionally added in the feed for reducing vitreous humour
The alkali metal oxide of fusing point and the various sulfur-bearings for vitreous humour clarification, nitre, the clarifier of fluorine.So as to raw material is greatly reduced
Cost, reduction pollution and treatment cost, and greatly improve the physical and chemical performance and quality of melting furnaces service life and glass.
The raw material of above-mentioned input kiln be spherical or block stock, to ensure raw material layer in leave smoothly exhaust gases passes,
To reduce flue gas resistance.
The bottom of pond portion in two parts glass melting pond, is placed with jet pipe submerged burner before and after above-mentioned（Referring to open special
Profit 201610063188.3）Or sleeve pipe submerged burner（Referring to publication 201610075858.3）；Forward part glass melting
The burner at tank furnace bottom sprays or bloats large flow-rate gas stream or bubble, is mainly used in fusing and the homogenizing of vitreous humour；Then part
The burner at glass smelting tank furnace bottom bloats low frequency bubble one by one, is mainly used in vitreous humour clarification purpose.
By adjusting flow of the hot gas in zones of different so that above-mentioned forward part and/or rear part glass melting pond
The temperature of middle vitreous humour is presented state of the art of the mid portion higher than its peripheral portion；So as to make vitreous humour in water by thermal convection current
Flat all directions are able to homogenizing.
Packed air exhaust duct is set above rear part glass melting pond, the high-temperature gas discharged in vitreous humour is introduced
In the bed of material above forward part glass melting pond, and Jing main chimney flues are discharged.
The invention has benefit that：Can the insoluble various problems of effectively solving tradition submergence heating means institute,
Make vitreous humour submergence heat it is this efficiently, energy-conservation and environmental protection melting process be implemented as reality on a large scale.
Description of the drawings
Fig. 1 is the theory structure profile of one of the embodiment of the present invention.
1. forward part glass melting pond in figure, 2. vitreous humour, 3. big flow jet pipe submerged burner or sleeve pipe submergence is fired
Burner, 4. blast furnace shaft furnace body of heater, 5. frit, 6. raw material dog-house, 7. after part glass melting pond, 8. metal level,
9. bubbling jet pipe submerged burner or bubbling sleeve pipe submerged burner, 10. vitreous humour discharging opening, 11. sealing air exhaust ducts, 12. is total
Flue, 13. flow liquid roads, 14. intercept wall, 15. large flow-rate gas streams or bubble, 16. low frequency bubbles.
Specific embodiment
In Fig. 1, glass melting pond is divided into forward part glass melting pond 1 and rear part glass melting pond 7, therebetween with obstruct wall
14 isolate upper space, and vitreous humour 2 is only communicated in its underpart；Above-mentioned mixed bubble is adopted in the bottom in forward part glass melting pond 1
Submerged combustion or plasma immersion heating, will spray people or blast glass for the large flow-rate gas stream or bubble 15 that heat vitreous humour
In glass liquid 2, vitreous humour 2 is set to be melted and homogenizing under violent bubbling tumbling state；The bottom of segment glass melting tank 7 behind
Bubble submerged combustion or plasma immersion heating or traditional glass bubbling method are mixed using above-mentioned low-intensity, in bubbling mode
The low frequency bubble 16 for being mainly used in fining glass liquid is blasted in vitreous humour 2 so that be melted in forward part glass melting pond 1 and
The bubble that homogenizing but still the vitreous humour 2 with a large amount of micro-bubbles are risen in a large number is taken metal level 8 out of and is clarified；In front portion
Point glass melting pond 1 is not completely melt the vitreous humour 2 with homogenizing, rear part glass melting pond 7 continue to complete its fusing and
Homogenization process；The vitreous humour fusing mode of the present invention, using the fusing mode of blast furnace shaft furnace formula, i.e. raw material is fed intake by top feed
Mouth 6 puts into, and hot gas are entered by raw material bottom, after the heat exchange cooling of frit 5 of the flue gas Jing in raw material layer from shaft furnace
The main chimney flue 12 in portion is excluded；1 in the forward part glass melting pond that the vitreous humour 2 of fusing sinks to below naturally, after being then fed into
Further fusing, homogenizing and clarification in segment glass melting tank 7, so as to produce the grade glass liquid for molding.
Claims (8)
1. vitreous humour submergence heating high temperature fractional melting method, is characterized in that：Glass melting pond is divided into into before and after two parts, is used therebetween
Intercept wall to isolate upper space, vitreous humour is only communicated in its underpart；Mixed using above-mentioned in the bottom in forward part glass melting pond
Bubble submerged combustion or plasma immersion heating, will spray people or blast vitreous humour for the gas big flow for heating vitreous humour
It is interior, vitreous humour is melted and homogenizing under violent bubbling tumbling state；Behind the bottom of segment glass melting tank is using upper
State low-intensity and mix bubble submerged combustion or plasma immersion heating or traditional glass bubbling method, will be main in bubbling mode
Gas for fining glass liquid is blasted in vitreous humour so that is melted with homogenizing in forward part glass melting pond but still is carried
The bubble that the vitreous humour of a large amount of micro-bubbles is risen in a large number is taken metal level out of and is clarified；It is not complete in forward part glass melting pond
The vitreous humour with homogenizing is melted entirely, and in rear part glass melting pond its fusing and homogenization process are continued to complete；The glass of the present invention
Glass liquid melts mode, is put into by top using the fusing mode of blast furnace shaft furnace formula, i.e. raw material, and hot gas are entered by raw material bottom
Enter, flue gas is excluded Jing after with raw material layer heat exchange cooling from shaft furnace top；The vitreous humour of fusing sinks to forward part below naturally
In glass melting pond, be then fed in rear part glass melting pond further fusing, homogenizing and clarification, so as to produce for into
The grade glass liquid of type.
2., according to the vitreous humour submergence heating high temperature fractional melting method that claim 1 is above-mentioned, it is characterized in that：Glass melting pond is anterior
Point glass liquid heating temperature control more than 2000 DEG C, so as to while vitreous humour is by rapid melting, make partial raw gas
It is turned to clarifier to use.
3., according to the vitreous humour submergence heating high temperature fractional melting method that claim 1 is above-mentioned, it is characterized in that：Above-mentioned hot gas are
Hydrogen and the high-temperature steam of oxygen mixed combustion in vitreous humour；Or natural gas and the mixed combustion in vitreous humour of oxygen or air
Flue gas；Or the high temperature plasma gas such as air, the vapor being ionized.
4., according to the vitreous humour submergence heating high temperature fractional melting method that claim 1 is above-mentioned, it is characterized in that：Due to adopting high temperature melting
Change, the alkali metal oxide and various vitreous humour clarifiers for reducing vitreous humour fusing point is no longer intentionally added in the feed, from
And cost of material is greatly reduced, reduces pollution and treatment cost, and greatly improve the materialization of melting furnaces service life and glass
Performance and quality.
5., according to the vitreous humour submergence heating high temperature fractional melting method that claim 1 is above-mentioned, it is characterized in that：Above-mentioned input kiln
Raw material be spherical or block stock, to ensure raw material layer in leave smoothly exhaust gases passes, to reduce flue gas resistance.
6., according to the vitreous humour submergence heating high temperature fractional melting method that claim 1 is above-mentioned, it is characterized in that：Two before and after above-mentioned
Divide the bottom of pond portion in glass melting pond, be placed with jet pipe submerged burner or sleeve pipe submerged burner；Forward part glass melting pond
The burner of kiln bottom sprays or bloats large flow-rate gas stream or bubble, is mainly used in fusing and the homogenizing of vitreous humour；Then part glass
The burner of glass melting tank kiln bottom bloats low frequency bubble one by one, is mainly used in vitreous humour clarification purpose.
7., according to the vitreous humour submergence heating high temperature fractional melting method that claim 1 is above-mentioned, it is characterized in that：It is molten in rear segment glass
Change and set Packed air exhaust duct above pond, the high-temperature gas discharged in vitreous humour is introduced above forward part glass melting pond
In the bed of material, and Jing main chimney flues are discharged.
8., according to the vitreous humour submergence heating high temperature fractional melting method that claim 1 is above-mentioned, it is characterized in that：Add steam by adjusting
Flow of the body in zones of different so that in the middle of the temperature of vitreous humour is presented in above-mentioned forward part and/or rear part glass melting pond
State of the art of the part higher than its peripheral portion；So as to enable vitreous humour in horizontal all directions homogenizing by thermal convection current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710044501.3A CN106673405A (en) | 2017-01-21 | 2017-01-21 | High-temperature step-by-step melting method adopting submerged heating for molten glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710044501.3A CN106673405A (en) | 2017-01-21 | 2017-01-21 | High-temperature step-by-step melting method adopting submerged heating for molten glass |
Publications (1)
| Publication Number | Publication Date |
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| CN106673405A true CN106673405A (en) | 2017-05-17 |
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ID=58859822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710044501.3A Pending CN106673405A (en) | 2017-01-21 | 2017-01-21 | High-temperature step-by-step melting method adopting submerged heating for molten glass |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110282860A (en) * | 2019-07-15 | 2019-09-27 | 中国建材国际工程集团有限公司 | A kind of burner |
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|---|---|---|---|---|
| CN1882505A (en) * | 2003-09-19 | 2006-12-20 | 法国圣戈班玻璃厂 | Preparation of silicate or glass in a furnace with burners immersed in a reducing medium |
| CN101031515A (en) * | 2004-07-28 | 2007-09-05 | 法国圣戈班玻璃厂 | Method and furnace with series-arranged baths for producing glass frits |
| CN105621859A (en) * | 2016-01-27 | 2016-06-01 | 徐林波 | Low-intensity mixed bubble submerged combustion method |
| CN105884173A (en) * | 2016-04-08 | 2016-08-24 | 徐林波 | Cleaning fusion method and fusing furnace for glass metal |
| CN205501103U (en) * | 2016-04-06 | 2016-08-24 | 徐林波 | Vertical glass melting furnace |
| CN205662448U (en) * | 2016-04-14 | 2016-10-26 | 徐林波 | Dispersion tympanic bulla submerged combustion glass melting furnace |
-
2017
- 2017-01-21 CN CN201710044501.3A patent/CN106673405A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1882505A (en) * | 2003-09-19 | 2006-12-20 | 法国圣戈班玻璃厂 | Preparation of silicate or glass in a furnace with burners immersed in a reducing medium |
| CN101031515A (en) * | 2004-07-28 | 2007-09-05 | 法国圣戈班玻璃厂 | Method and furnace with series-arranged baths for producing glass frits |
| CN105621859A (en) * | 2016-01-27 | 2016-06-01 | 徐林波 | Low-intensity mixed bubble submerged combustion method |
| CN205501103U (en) * | 2016-04-06 | 2016-08-24 | 徐林波 | Vertical glass melting furnace |
| CN105884173A (en) * | 2016-04-08 | 2016-08-24 | 徐林波 | Cleaning fusion method and fusing furnace for glass metal |
| CN205662448U (en) * | 2016-04-14 | 2016-10-26 | 徐林波 | Dispersion tympanic bulla submerged combustion glass melting furnace |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110282860A (en) * | 2019-07-15 | 2019-09-27 | 中国建材国际工程集团有限公司 | A kind of burner |
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