JPH11100214A - Glass melting furnace - Google Patents
Glass melting furnaceInfo
- Publication number
- JPH11100214A JPH11100214A JP9279919A JP27991997A JPH11100214A JP H11100214 A JPH11100214 A JP H11100214A JP 9279919 A JP9279919 A JP 9279919A JP 27991997 A JP27991997 A JP 27991997A JP H11100214 A JPH11100214 A JP H11100214A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- furnace
- electrodes
- melting furnace
- oxygen
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- 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
-
- 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
- C03B5/183—Stirring devices; Homogenisation using thermal means, e.g. for creating convection currents
- C03B5/185—Electric means
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Glass Melting And Manufacturing (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ガラス溶融炉、特に酸
素−燃料バーナーによりガラスを溶融する溶融炉に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass melting furnace, and more particularly to a melting furnace for melting glass using an oxy-fuel burner.
【０００２】[0002]
【従来の技術】従来、ガラス溶融炉においては、重油、
灯油或いは天然ガスを空気で燃焼するバーナーを用いて
おり、ガラスを均等に加熱するため、ガラスに火炎を直
接当てず、輻射伝熱を主体とする溶融を行っていた。2. Description of the Related Art Conventionally, in a glass melting furnace, heavy oil,
A burner that burns kerosene or natural gas with air is used. In order to heat the glass evenly, melting is mainly performed by radiant heat transfer without directly applying a flame to the glass.
【０００３】しかしながら、空気を支燃性ガスとしたバ
ーナーによる空気燃焼では、燃焼に寄与しない空気中の
窒素を多量に含有することから排ガス量、ＮＯｘの発生
量が多くなり、これにより炉内から持ち去られる熱量が
多くなるため、熱効率が悪いという問題があった。この
ため通常は、蓄熱室や熱交換器を用いて、排ガスの熱を
蓄熱し、燃焼用空気と交換させて予熱することが行われ
ているが、十分なものではなく、更には、予熱空気の温
度を高くして熱効率の改善をするほどＮＯｘの発生量が
増加するという不都合がある。[0003] However, in air combustion using a burner in which air is used as a supporting gas, the amount of exhaust gas and NOx generated increases due to the large amount of nitrogen contained in the air that does not contribute to combustion. Since the amount of heat carried away increases, there has been a problem that thermal efficiency is poor. For this reason, the heat of the exhaust gas is usually stored using a heat storage chamber or a heat exchanger, and is exchanged with combustion air for preheating, but this is not sufficient, and furthermore, the preheating air is not sufficient. There is a disadvantage that the amount of NOx generated increases as the temperature is increased and the thermal efficiency is improved.
【０００４】斯様な事情から、近年、酸素を支燃性ガス
としたバーナーが着目され、これによるガラスの溶融が
実用化されるようになってきた。この酸素燃焼によれ
ば、空気燃焼に比して燃焼による排ガス量が約１／４〜
１／５になり、これに伴う損失熱量も減少するため、ガ
ラス溶融炉の熱効率の向上、大幅なＮＯｘの低減化が図
れる。[0004] Under such circumstances, in recent years, attention has been paid to burners using oxygen as a combustion-supporting gas, and the melting of glass by this has come into practical use. According to this oxyfuel combustion, the amount of exhaust gas due to combustion is about 1/4 to that of air combustion.
Since the amount of heat loss is reduced by 1/5, the thermal efficiency of the glass melting furnace can be improved and NOx can be significantly reduced.
【０００５】[0005]
【発明が解決しようとする課題】酸素−燃料バーナー
は、空気燃焼によるバーナーに比べて、火炎温度が高
く、しかも燃焼速度及び火炎中のガス流速が非常に速い
ために、その火炎長は短くなる。従って、ガラス溶融炉
のような平炉では、先記したように輻射伝熱を主体とす
る溶融を行っていることから、水平方向に延びる長い火
炎が必要になるところ、酸素−燃料バーナーを用いたガ
ラス溶融炉においては、酸素−燃料バーナーの火炎直下
にあるガラスの温度が局部的に高くなり、炉内のガラス
を均一に加熱することができないという問題がある。ま
た、ガラス溶融炉内のガラスが均一に加熱されないと、
炉内における溶融ガラスを所望の流れに制御できず、早
流れと称する現象が生じる。この早流れ現象が生じる
と、例えばガラス中に微小な泡が発生し、炉内の溶融ガ
ラスが所期のガラス品位にならないまま成型部に供給さ
れされることになり、かかる溶融ガラスから成型された
ガラス製品においては、シードと称するガラス欠陥が生
じる。Oxy-fuel burners have a higher flame temperature and a much higher combustion velocity and gas flow rate in the flame than an air-fired burner, resulting in a shorter flame length. . Therefore, in a flat furnace such as a glass melting furnace, since melting mainly by radiant heat transfer is performed as described above, where a long flame extending in the horizontal direction is required, an oxygen-fuel burner was used. In the glass melting furnace, there is a problem that the temperature of the glass immediately below the flame of the oxy-fuel burner locally increases, and the glass in the furnace cannot be heated uniformly. Also, if the glass in the glass melting furnace is not heated uniformly,
The molten glass in the furnace cannot be controlled to a desired flow, and a phenomenon called fast flow occurs. When this fast flowing phenomenon occurs, for example, fine bubbles are generated in the glass, and the molten glass in the furnace is supplied to the molding section without achieving the expected glass quality, and the molten glass is molded from the molten glass. In glass products, glass defects called seeds occur.
【０００６】そこで、本発明の目的は、高い熱効率で、
しかもＮＯｘの減少を図りながらガラスを溶融し、且つ
炉内のガラスが局部的に昇温加熱されることなく、溶融
ガラスを所望の流れに制御して、高品位の溶融ガラスが
得られるガラス溶融炉を提供することである。Therefore, an object of the present invention is to provide a high thermal efficiency,
In addition, glass is melted while reducing NOx, and the glass in the furnace is controlled to a desired flow without locally heating and heating the glass in the furnace, thereby obtaining a high-quality molten glass. Is to provide a furnace.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記の課題及
び目的に鑑みてなされたもので、炉側壁に酸素−燃料バ
ーナーが設置され、且つ炉中に溶融ガラスの流れ方向に
対して略直交する方向に対をなす電極が所定間隔で配設
されてなることを特徴とするガラス溶融炉である。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems and objects, and has an oxygen-fuel burner installed on a furnace side wall, and is provided substantially in the furnace with respect to the flow direction of molten glass. A glass melting furnace characterized in that electrodes forming a pair in a direction orthogonal to each other are arranged at predetermined intervals.
【０００８】[0008]
【作用】本発明のガラス溶融炉においては、炉側壁に設
置された酸素−燃焼バーナーの酸素燃焼により、高い熱
効率でガラスを溶融し、大幅なＮＯｘの低減化を図る一
方で、酸素燃焼によりガラスに局部加熱が生じること
で、所望の溶融ガラスの流れが得られない原因となる温
度の低いガラス領域については、炉中の電極により、か
かる領域のガラスを昇温加熱する。これによって、炉内
の溶融ガラスに早流れ現象を生じさせず、高品位の溶融
ガラスが得られるように溶融ガラスの流れを制御でき
る。In the glass melting furnace of the present invention, the oxygen-combustion burner installed on the side wall of the furnace melts the glass with high thermal efficiency and greatly reduces NOx. In a glass region having a low temperature that causes a failure in obtaining a desired flow of molten glass due to local heating, the glass in the region is heated and heated by an electrode in a furnace. Thereby, the flow of the molten glass can be controlled so that a high-quality molten glass can be obtained without causing a rapid flow phenomenon in the molten glass in the furnace.
【０００９】本発明のガラス溶融炉において、炉中に配
設される電極の配置は、溶融ガラスの流れ方向に対して
略直交する方向に対をなしていることが、高品位の溶融
ガラスを得るための溶融ガラスの流れを制御する上で最
も適しており、昇温加熱したいガラス領域に位置する電
極間に電力を供給することにより、ジュール効果によっ
て該領域のガラスが昇温加熱される。[0009] In the glass melting furnace of the present invention, the arrangement of the electrodes disposed in the furnace is paired in a direction substantially perpendicular to the flow direction of the molten glass. It is most suitable for controlling the flow of the molten glass to be obtained. By supplying electric power between the electrodes located in the glass region to be heated and heated, the glass in the region is heated and heated by the Joule effect.
【００１０】[0010]
【実施例】以下、本発明のガラス溶融炉について実施例
に基づいて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The glass melting furnace of the present invention will be described below based on embodiments.
【００１１】図１は本発明のガラス溶融炉の水平断面
図、図２は本発明のガラス溶融炉の垂直断面図である。FIG. 1 is a horizontal sectional view of the glass melting furnace of the present invention, and FIG. 2 is a vertical sectional view of the glass melting furnace of the present invention.
【００１２】耐食性に優れた電鋳アルミナ−ジルコニア
−シリカ耐火物により構築されたガラス溶融炉１の両側
の炉側壁１ａには、複数本の酸素−燃料バーナー２が適
宜の間隔で各々設置してある。本実施例において、酸素
−燃料バーナー２は、支燃性ガスとしての純度９０％以
上の酸素と、燃料としての重油を混合燃焼させるもので
ある。A plurality of oxygen-fuel burners 2 are installed at appropriate intervals on the furnace side walls 1a on both sides of the glass melting furnace 1 made of electroformed alumina-zirconia-silica refractory having excellent corrosion resistance. is there. In the present embodiment, the oxy-fuel burner 2 is for mixing and burning oxygen having a purity of 90% or more as a combustion supporting gas and heavy oil as a fuel.
【００１３】ガラス溶融炉１の炉底壁１ｂには、複数対
の電極３を炉底壁１ｂから溶融ガラスＧに没入させて取
り付けてある。電極３の材質はモリブデンからなり、各
電極３は、ガラス溶融炉１内の溶融ガラスＧの流れ方向
に対して略直交する方向に対をなして配置しており、電
極３への電力の供給は各電極対毎に行えるように制御器
４に接続して構成してある。A plurality of pairs of electrodes 3 are attached to the furnace bottom wall 1b of the glass melting furnace 1 by being immersed in the molten glass G from the furnace bottom wall 1b. The electrodes 3 are made of molybdenum, and the electrodes 3 are arranged in pairs in a direction substantially perpendicular to the flow direction of the molten glass G in the glass melting furnace 1. Are connected to the controller 4 so as to be performed for each electrode pair.
【００１４】５はガラス原料をガラス溶融炉１内へ供給
するスクリューチャージャーである。Reference numeral 5 denotes a screw charger for supplying a glass raw material into the glass melting furnace 1.
【００１５】かかるガラス溶融炉１によるガラスの溶融
は以下の要領で行った。The glass was melted by the glass melting furnace 1 in the following manner.
【００１６】ガラス溶融炉１の炉側壁１ａに設置された
酸素−燃料バーナー２には、酸素を２０００〜２２００
Ｎｍ3 ／Ｈｒ、重油を８００〜９００ｌ／Ｈｒで供給
し、両者を混合燃焼させることによりガラスを加熱溶融
した。一方、かかる酸素燃焼により高温域となるガラス
領域に比べて温度が低いガラス領域については、所望の
溶融ガラスＧの流れを得るために加熱が必要とされるガ
ラス領域に対して、かかる領域に位置する電極間に電力
を供給することにより、該領域のガラスを昇温加熱し
た。The oxygen-fuel burner 2 installed on the furnace side wall 1a of the glass melting furnace 1 is supplied with oxygen from 2000 to 2200.
Nm 3 / Hr and heavy oil were supplied at 800 to 900 l / Hr, and the two were mixed and burned to heat and melt the glass. On the other hand, a glass region having a lower temperature than a glass region which becomes a high-temperature region due to such oxygen combustion is located in such a region with respect to a glass region which needs to be heated to obtain a desired flow of the molten glass G. The glass in the area was heated and heated by supplying power between the electrodes.
【００１７】その結果、ガラス溶融炉１の溶融ガラスＧ
には、早流れの現象は全く生じず、所望の溶融ガラスＧ
の流れとなり、高品位の溶融ガラスＧが得られた。ま
た、酸素−燃焼バーナーの酸素燃焼により、高い熱効率
で溶融ガラスＧを溶融することができ、大幅なＮＯｘの
低減化が図れた。As a result, the molten glass G of the glass melting furnace 1
Does not cause any rapid flow phenomenon, and the desired molten glass G
, And high quality molten glass G was obtained. Further, the molten glass G can be melted with high thermal efficiency by the oxygen combustion of the oxy-combustion burner, and the NOx can be significantly reduced.
【００１８】尚、上記酸素−燃料バーナーの燃料は重油
以外の液体燃料であってもよく、また気体燃料でも使用
可能である。The fuel of the oxy-fuel burner may be a liquid fuel other than heavy oil or a gaseous fuel.
【００１９】[0019]
【発明の効果】以上説明したように、本発明のガラス溶
融炉によれば、高い熱効率で、しかもＮＯｘの減少を図
りながらガラスを溶融し、且つ炉内のガラスが局部的に
昇温加熱されることなく、溶融ガラスを所望の流れに制
御して、高品位の溶融ガラスが得られるという優れた効
果を奏する。As described above, according to the glass melting furnace of the present invention, glass is melted with high thermal efficiency while reducing NOx, and the glass in the furnace is locally heated and heated. Without this, an excellent effect of controlling the molten glass to a desired flow and obtaining a high-quality molten glass is exhibited.
【図１】本発明のガラス溶融炉の水平断面図である。FIG. 1 is a horizontal sectional view of a glass melting furnace of the present invention.
【図２】本発明のガラス溶融炉の垂直断面図である。FIG. 2 is a vertical sectional view of the glass melting furnace of the present invention.
１ ガラス溶融炉 １ａ 炉側壁 １ｂ 炉底壁 ２ 酸素−燃料バーナー ３ 電極 ４ 制御器 ５ スクリューチャージャー Ｇ 溶融ガラス DESCRIPTION OF SYMBOLS 1 Glass melting furnace 1a Furnace side wall 1b Furnace bottom wall 2 Oxygen-fuel burner 3 Electrode 4 Controller 5 Screw charger G Molten glass
Claims (1)
れ、且つ炉中に溶融ガラスの流れ方向に対して略直交す
る方向に対をなす電極が所定間隔で配設されてなること
を特徴とするガラス溶融炉。1. An oxygen-fuel burner is installed on a side wall of a furnace, and a pair of electrodes are arranged at predetermined intervals in a direction substantially perpendicular to a flow direction of molten glass in the furnace. Glass melting furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9279919A JPH11100214A (en) | 1997-09-26 | 1997-09-26 | Glass melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9279919A JPH11100214A (en) | 1997-09-26 | 1997-09-26 | Glass melting furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11100214A true JPH11100214A (en) | 1999-04-13 |
Family
ID=17617748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9279919A Pending JPH11100214A (en) | 1997-09-26 | 1997-09-26 | Glass melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11100214A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005510439A (en) * | 2001-11-27 | 2005-04-21 | サン−ゴバン・イソベール | Apparatus and method for melting batch material |
| WO2013042777A1 (en) * | 2011-09-22 | 2013-03-28 | 旭硝子株式会社 | Production method for positive electrode material for secondary battery |
| CN103771684A (en) * | 2012-10-18 | 2014-05-07 | 温州市康尔微晶器皿有限公司 | Microcrystalline glass unit kiln total-oxygen electric-boosting melting technology |
| CN107673584A (en) * | 2017-10-12 | 2018-02-09 | 彩虹集团（邵阳）特种玻璃有限公司咸阳分公司 | A kind of cover-plate glass electric smelter and its heating means |
| KR20190049756A (en) * | 2016-08-26 | 2019-05-09 | 코닝 인코포레이티드 | Apparatus and method for manufacturing glass articles |
| CN111051254A (en) * | 2017-09-13 | 2020-04-21 | 日本电气硝子株式会社 | Method for manufacturing glass article |
| JP2020513396A (en) * | 2016-11-08 | 2020-05-14 | コーニング インコーポレイテッド | Apparatus and method for forming glass articles |
| CN115385553A (en) * | 2022-07-28 | 2022-11-25 | 陕西彩虹工业智能科技有限公司 | Microcrystalline glass's smelting device |
-
1997
- 1997-09-26 JP JP9279919A patent/JPH11100214A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005510439A (en) * | 2001-11-27 | 2005-04-21 | サン−ゴバン・イソベール | Apparatus and method for melting batch material |
| WO2013042777A1 (en) * | 2011-09-22 | 2013-03-28 | 旭硝子株式会社 | Production method for positive electrode material for secondary battery |
| CN103771684A (en) * | 2012-10-18 | 2014-05-07 | 温州市康尔微晶器皿有限公司 | Microcrystalline glass unit kiln total-oxygen electric-boosting melting technology |
| TWI796897B (en) * | 2016-08-26 | 2023-03-21 | 美商康寧公司 | Apparatus and methods for forming a glass article |
| KR20190049756A (en) * | 2016-08-26 | 2019-05-09 | 코닝 인코포레이티드 | Apparatus and method for manufacturing glass articles |
| JP2019524630A (en) * | 2016-08-26 | 2019-09-05 | コーニング インコーポレイテッド | Glass article forming apparatus and method |
| TWI753002B (en) * | 2016-08-26 | 2022-01-21 | 美商康寧公司 | Apparatus and methods for forming a glass article |
| US11319234B2 (en) * | 2016-08-26 | 2022-05-03 | Corning Incorporated | Apparatus and method for forming a glass article |
| KR20220066433A (en) * | 2016-08-26 | 2022-05-24 | 코닝 인코포레이티드 | Apparatus and method for forming a glass article |
| US11565960B2 (en) | 2016-11-08 | 2023-01-31 | Corning Incorporated | Apparatus and method for forming a glass article |
| JP2020513396A (en) * | 2016-11-08 | 2020-05-14 | コーニング インコーポレイテッド | Apparatus and method for forming glass articles |
| TWI764952B (en) * | 2016-11-08 | 2022-05-21 | 美商康寧公司 | Apparatus and method for forming a glass article |
| CN111051254A (en) * | 2017-09-13 | 2020-04-21 | 日本电气硝子株式会社 | Method for manufacturing glass article |
| CN107673584A (en) * | 2017-10-12 | 2018-02-09 | 彩虹集团（邵阳）特种玻璃有限公司咸阳分公司 | A kind of cover-plate glass electric smelter and its heating means |
| CN115385553A (en) * | 2022-07-28 | 2022-11-25 | 陕西彩虹工业智能科技有限公司 | Microcrystalline glass's smelting device |
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