CN101353221B - Method for converting air combustion-supporting kiln into all-oxygen combustion kiln without shutdown of furnace - Google Patents
Method for converting air combustion-supporting kiln into all-oxygen combustion kiln without shutdown of furnace Download PDFInfo
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- CN101353221B CN101353221B CN2008101396975A CN200810139697A CN101353221B CN 101353221 B CN101353221 B CN 101353221B CN 2008101396975 A CN2008101396975 A CN 2008101396975A CN 200810139697 A CN200810139697 A CN 200810139697A CN 101353221 B CN101353221 B CN 101353221B
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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
- C03B5/2353—Heating the glass by combustion with pure oxygen or oxygen-enriched air, e.g. using oxy-fuel burners or oxygen lances
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
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- Glass Melting And Manufacturing (AREA)
Abstract
The invention relates to a method that an air combustion-supporting glass furnace converts a pure oxygen combustion furnace without shutdown of boiler, and the method is characterized by including the following steps: (a) according to the capacity of a furnace, respectively arranging a group of pure oxygen burners at the both sides of the furnace; (b) according to the capacity of the furnace, closing a part of the regenerator, the small furnace and the flue in the furnace, and preserving a part of the small furnace-regenerator-flue as a channel for discharging smoke gas of the pure oxygen burner; (c) starting and burning the pure oxygen burner form one end in sequence, and closing the corresponding air combustion-supporting burner till the pure oxygenburner is adopted for burning all in the furnace. The advantages of the invention are that: 1. the directly converted pure oxygen combustion glass furnace can reduce the energy consumption of the present furnaces by 18%-30%, the discharge of NOx and soot can be reduced greatly, and very good environmental benefit is produced; 2. the construction investment for rebuilding pure oxygen combustion new furnaces can be reduced greatly; 3. the technology can be applied to rebuilding the furnaces of cross flame or horseshoe flame in various glass production departments such as plate glass, vessel glass, fibre glass, and the like, and the application is extensive.
Description
Technical field
The present invention relates to a kind of air-breathing glass melter under the situation of not blowing out, be directly changed into the method for full-oxygen combustion melting furnaces.
Background technology
Recently, the depletion charge in the glass industry accounts for more than 30%～60% of glass manufacturing cost, and along with rising violently of energy prices also risen, it is one of most critical factor that influences glass production producer economic benefit.Particularly existing in the clue of current energy dilemma, under the current conditions that energy prices constantly rise, it is more and more sharp-pointed that the fuel cost problem will seem.The pure oxygen combustion technology that development in recent years goes out, can significantly reduce the energy consumption of melting furnaces, it is the combustion-supporting gas that traditional combustion-supporting gas is changed to oxygen content＞90%, wherein account in the air～nitrogen of 78-79% is separated no longer participates in burning, and fuel can save 18%～30%, has reduced NOx80%～90% and 50% above soot emissions, in addition, full-oxygen combustion does not need to change fire, and kiln structure does not have port, no regenerator, and the thermo-efficiency of fuel improves greatly.But build the total oxygen melting furnaces and need drop into substantial contribution, and production cycle also is long, what generally use in China and the world wide at present all is air-breathing melting furnaces, the kiln age that wherein also has more melting furnaces is more than 2-3, if this part melting furnaces is still continued to use the air-breathing mode, energy-saving and environmental protection are caused very adverse influence.
Summary of the invention
Purpose of the present invention is exactly for solving the bigger shortcoming of energy consumption that the air-breathing melting furnaces exist, and a kind of of proposition just directly applies to method at operating air-breathing melting furnaces with pure oxygen combustion technology.
To achieve these goals, the present invention has adopted following technical scheme:
A kind of method of converting air combustion-supporting kiln into all-oxygen combustion kiln without shutdown of furnace is characterized in that may further comprise the steps:
(a), according to the capacity of kiln, one group of full-oxygen combustion device is set respectively in the kiln both sides;
(b), according to the capacity of kiln, close a part of regenerator, port and flue in the kiln, keep the discharge-channel of a part of port-regenerator-flue as full-oxygen combustion device cigarette vapour;
(c), start successively from an end and to light the full-oxygen combustion device and to close corresponding air-breathing burner, in kiln, all adopt the burning of full-oxygen combustion devices.
Also can take after the air-breathing burner is changing fire, mounted full-oxygen combustion device be lighted one by one, regulate the air-breathing burner of closing the opposite again, and light mounted full-oxygen combustion device in a side of ceasing fire.After the full-oxygen combustion device of both sides was all lighted, the port-regenerator of both sides-flue is switch according to circumstances.
According to technique scheme, for less than the 300t/d glass melter, one or a pair of discharge flue can only be set, this discharge flue is located in melting furnaces fritting section between the fusing section; For the 300-1000t/d glass melter, the discharge-channel of full-oxygen combustion cigarette vapour can be provided with two pairs, promptly is positioned at extremely fusing section of melting furnaces fritting section and selects a pair of discharge flue is set, and is positioned near the selection of fining end a pair of discharge flue is set.
Both sides are provided with one group of full-oxygen combustion device that is symmetrically distributed respectively in the glass melter, also can in glass melter, one group of staggered full-oxygen combustion device be set both sides respectively, each full-oxygen combustion device adopts continuous torch firing, do not commutate, full-oxygen combustion device nozzle keeps 0～10 ° angle at level attitude and melting furnaces burner medullary ray.
The oxy-fuel glass furnace of conversion uses pure oxygen combustion technology, and it is the alternative traditional air-breathing of oxygen 90% or more with purity, cooperates various fuel molten glasses.
Glass melter of the present invention comprises: sheet glass, ware glass, and the cross flame of each type of using in the glass production producer of glass fibre etc., horse shoe flame melting furnaces, its scale can be at 30t/d to 1000t/d.With the glass melter that normally moves, not blowing out converts to after the full-oxygen combustion kiln in ordinary production, and exhaust gas volumn will reduce 35-60%.The regenerator of kiln, a port part are closed after transforming, and no longer act as a fuel and the passage of combustion-supporting gas, also as the vent pathway of commutation back flue gas.The discharge-channel of full-oxygen combustion cigarette vapour is former air-breathing part (a pair of or two a pairs) discharge-channel (port-regenerator-flue-chimney).
The present invention has following advantage:
(1), the oxy-fuel combustion glass melting furnace of directly conversion can reduce the 18%-30% of existing melting furnaces energy expenditure, and the waste gas overwhelming majority that glass melter produces is H
2O steam and CO
2, reduce the discharging of NOx and flue dust significantly, produce very good environmental benefit.
(2), the direct oxy-fuel combustion glass melting furnace of conversion, can be in operation and realize the target of full-oxygen combustion kiln, instant effect is reconstructed when not needing to wait for cold repair again, and is energy-conservation, reduce discharging and can realize early.
(3), this technology can be used in the cross flame of each glass production departments such as sheet glass, ware glass, glass fibre or the transformation of horse shoe flame kiln, suitability is extensive, promotes the use to produce very considerable economic and social benefit.
Description of drawings:
Fig. 1 is a kind of full-oxygen combustion device layout drawing of float glass cross fire furnace;
Fig. 2 is the burning of cross fire furnace shown in Figure 1, the semisectional view of fume exhaust system figure;
Fig. 3 is a kind of full-oxygen combustion device layout drawing of horseshoe flame furnace;
Fig. 4 is the burning of horseshoe flame furnace shown in Figure 3, the semisectional view of fume exhaust system figure;
Fig. 5 is a full-oxygen combustion device asymmetric geometry mode vertical view.
Embodiment:
Embodiment one: as Fig. 1, shown in Figure 2 is the vertical view of the float glass cross flame melting furnaces of a 500t/d, the kiln of glass melter deduct age the on-the-spot oxygen system engineering construction time also surplusly have 〉=2 years, wherein T portion is a dog-house, G portion is the fritting of melting furnaces, fusing, fining end, L portion is the effusive card neck of glass melt place, on the breastwork of the both sides of melting furnaces, be symmetrical arranged one group of burner (sequence number 1-6) respectively, the burner setting of also can staggering, as shown in Figure 5, a pair of burner 3,4 stagger, a pair of burner 5,6,7, though 8 do not stagger, but the mode of jet flames staggers, in order to abundant burning.Fig. 2 is the burning of cross fire furnace shown in Figure 1, the semisectional view of fume exhaust system figure, and wherein F portion is that combustion space, the H portion of melting furnaces are that to be arranged on full-oxygen combustion device, E portion on the breastwork be that port, D portion are that regenerator, C portion are that bearer arch lower flue, B portion are that the lock of flue, A discharge-channel is pulled.Because long-term the burning lost, when the full-oxygen combustion device can't be installed, can take top, bottom or both sides that the full-oxygen combustion device is installed when the breastwork of air-breathing kiln at port.
The discharge-channel of full-oxygen combustion cigarette vapour can be provided with two pairs, pair of channels is a pair of among former 4*, 5*, the 6* number (port-regenerator-flue-chimney), second pair of passage is a pair of among former 1*, 2*, the 3* number (port-regenerator-flue-chimney), promptly be positioned at melting furnaces fritting section to fusing section and select a pair of discharge flue of design, select a pair of discharge flue of design near being positioned at fining end, A pulled by the lock of the discharge-channel of full-oxygen combustion cigarette vapour or variable valve should be in full-gear.
The full-oxygen combustion conversion routine is as follows: 1, start and light the full-oxygen combustion device No. 1,2, light No. 6, No. 5 successively ... until the full-oxygen combustion device, and close remainder air-breathing burner and corresponding discharge flue.3, with a pair of or two pairs of flashboard standard-sized sheets of discharge-channel (port E-regenerator D-flue C-chimney B, A) of full-oxygen combustion cigarette vapour, as full-oxygen combustion cigarette vapour discharging flue, 4, adjust operation working temperature curve, gas part in the kiln, charging capacity (metal level), smoke evacuation flashboard (control furnace pressure).
Embodiment two
As Fig. 3, Fig. 4 is a kind of full-oxygen combustion device layout drawing of horseshoe flame furnace and the burning of horseshoe flame furnace, the semisectional view of fume exhaust system figure, its scale is the horseshoe flame furnace of 100t/d, wherein the original air- breathing burner 10,20 of horseshoe flame furnace replaces flame in melting furnaces, shown in the horseshoe type flame among the figure.Be converted to the melting furnaces of full-oxygen combustion, existing or a pair of full-oxygen combustion discharge flue (structure as shown in Figure 4, identical with embodiment one) of only needing, this discharge flue are located in melting furnaces fritting section between the fusing section, close the discharge flue that other is not wanted in addition.Can settle No. 0 full-oxygen combustion device of No. 0 port at the end of flame, the full-oxygen combustion device is set No. 1 at the melting furnaces postmedian,
The full-oxygen combustion conversion routine is as follows: 1, light No. 0 full-oxygen combustion device and No. 1 full-oxygen combustion device successively, 2, close original air-breathing burner simultaneously; 3, open the total oxygen discharge flue, and close the residue discharge flue; 4, adjust operation working temperature curve, gas part in the kiln, charging capacity (metal level), smoke evacuation flashboard (control furnace pressure).
Embodiment three,
Float glass smelting kiln with a 500t/d is an example; if deducting the on-the-spot oxygen system engineering construction time age, kiln also surplusly has 〉=time in 2 years; can implement air-breathing conversion full-oxygen combustion melting furnaces; switch process is as follows; 1; the final condition that becomes the full-oxygen combustion kiln after existing air-breathing kiln and the transformation is offered mathematical simulation carry out computing; 2; according to calculating the full-oxygen combustion device that to determine at breastwork installation site and correlation parameter; 3; install the full-oxygen combustion device; 4; side full-oxygen combustion device after will ceasing fire at once in fire to be changed back is lighted and is regulated; 5, close opposite side air-breathing burner, 6; opposite side full-oxygen combustion device is lighted and regulated, 7; open and close flue shutter as required.
Claims (8)
1. the method for a converting air combustion-supporting kiln into all-oxygen combustion kiln without shutdown of furnace is characterized in that may further comprise the steps:
(a), according to the capacity of kiln, one group of full-oxygen combustion device is set respectively in the kiln both sides;
(b), according to the capacity of kiln, close a part of regenerator, port and flue in the kiln, keep the discharge-channel of a part of port-regenerator-flue as full-oxygen combustion device cigarette vapour;
(c), light the full-oxygen combustion device and close corresponding air-breathing burner, all employing full-oxygen combustion device burnings in kiln.
2. the method for converting air combustion-supporting kiln into all-oxygen combustion kiln without shutdown of furnace according to claim 1 is characterized in that: start successively from an end and light the full-oxygen combustion device and close corresponding air-breathing burner, all adopt the burning of full-oxygen combustion device in kiln.
3. the method for converting air combustion-supporting kiln into all-oxygen combustion kiln without shutdown of furnace according to claim 1; it is characterized in that: also can take after the air-breathing burner is changing fire; in a side of ceasing fire mounted full-oxygen combustion device is lighted one by one; regulate the air-breathing burner of closing the opposite again; and light mounted full-oxygen combustion device; after the full-oxygen combustion device of both sides is all lighted, close the port-regenerator-flue of a part of melting furnaces both sides.
4. the method for converting air combustion-supporting kiln into all-oxygen combustion kiln without shutdown of furnace according to claim 1, it is characterized in that: for less than the 300t/d glass melter, one or a pair of discharge flue can only be set, and this discharge flue is located in melting furnaces fritting section between the fusing section.
5. the method for converting air combustion-supporting kiln into all-oxygen combustion kiln without shutdown of furnace according to claim 1, it is characterized in that: for the 300-1000t/d glass melter, the discharge-channel of full-oxygen combustion cigarette vapour can be provided with two pairs, promptly be positioned at extremely fusing section of melting furnaces fritting section and select a pair of discharge flue is set, be positioned near the selection of fining end a pair of discharge flue is set.
6. the method for converting air combustion-supporting kiln into all-oxygen combustion kiln without shutdown of furnace according to claim 4 is characterized in that: both sides are provided with one group of full-oxygen combustion device that is symmetrically distributed respectively in the glass melter.
7. the method for converting air combustion-supporting kiln into all-oxygen combustion kiln without shutdown of furnace according to claim 4, it is characterized in that: both sides are provided with one group of staggered full-oxygen combustion device respectively in the glass melter.
8. according to the method for claim 5 or 6 described converting air combustion-supporting kiln into all-oxygen combustion kiln without shutdown of furnace, it is characterized in that: each full-oxygen combustion device adopts continuous torch firing, do not commutate, full-oxygen combustion device nozzle keeps 0～10 ° angle at level attitude and melting furnaces burner medullary ray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101396975A CN101353221B (en) | 2008-08-30 | 2008-08-30 | Method for converting air combustion-supporting kiln into all-oxygen combustion kiln without shutdown of furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101396975A CN101353221B (en) | 2008-08-30 | 2008-08-30 | Method for converting air combustion-supporting kiln into all-oxygen combustion kiln without shutdown of furnace |
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| CN101353221A CN101353221A (en) | 2009-01-28 |
| CN101353221B true CN101353221B (en) | 2011-10-26 |
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| CN2008101396975A Expired - Fee Related CN101353221B (en) | 2008-08-30 | 2008-08-30 | Method for converting air combustion-supporting kiln into all-oxygen combustion kiln without shutdown of furnace |
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| CN102229465B (en) * | 2011-04-30 | 2013-04-10 | 浙江大学 | Membrane oxygen-enriched combustion device of lithium aluminosilicate glass melting furnace and using method thereof |
| CN102875010A (en) * | 2012-10-31 | 2013-01-16 | 中国建材国际工程集团有限公司 | Float glass melting kiln for producing ultrathin glass |
| CN104692621A (en) * | 2013-12-05 | 2015-06-10 | 卢爱民 | Heat accumulating type total oxygen combustion glass-melting furnace |
| CN104496151B (en) * | 2015-01-13 | 2017-10-31 | 北京巨璟气体科技有限公司 | A kind of burnt industrial glass kiln system of full oxygen burning petroleum processed with carbon dioxide recovery |
| CN105481230A (en) * | 2015-12-29 | 2016-04-13 | 芜湖东旭光电科技有限公司 | Glass substrate smelting furnace |
| CN108609835A (en) * | 2018-06-27 | 2018-10-02 | 四川省玻纤集团有限公司 | A kind of basalt fibre melting tank furnace |
| CN110436758A (en) * | 2019-09-09 | 2019-11-12 | 蚌埠中光电科技有限公司 | A kind of smoke discharging device of total oxygen kiln |
| CN110903018A (en) * | 2019-12-19 | 2020-03-24 | 湖南巨强再生资源科技发展有限公司 | Method for producing 2mm float ultra-thin glass by adopting large horseshoe flame kiln |
| CN113429116B (en) * | 2021-06-11 | 2023-02-03 | 秦皇岛玻璃工业研究设计院有限公司 | Gradient oxygen-increasing low-NOx combustion device and process for float glass melting furnace |
| CN115180802A (en) * | 2022-07-08 | 2022-10-14 | 深圳好众科技投资有限公司 | Melting furnace for disposing incineration fly ash by vitrification technology |
| CN117720254A (en) * | 2023-11-01 | 2024-03-19 | 玻璃新材料创新中心(安徽)有限公司 | Transverse flame glass melting furnace based on thermochemical heat accumulation technology and method for controlling transverse flame by using same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4973346A (en) * | 1989-10-30 | 1990-11-27 | Union Carbide Corporation | Glassmelting method with reduced nox generation |
| CN1314316A (en) * | 2000-03-17 | 2001-09-26 | 中国科学院大连化学物理研究所 | Local oxygen enriching burning-aid method for glass kiln |
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2008
- 2008-08-30 CN CN2008101396975A patent/CN101353221B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4973346A (en) * | 1989-10-30 | 1990-11-27 | Union Carbide Corporation | Glassmelting method with reduced nox generation |
| CN1314316A (en) * | 2000-03-17 | 2001-09-26 | 中国科学院大连化学物理研究所 | Local oxygen enriching burning-aid method for glass kiln |
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