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JP4501285B2 - Glass melting furnace - Google Patents

Glass melting furnace Download PDF

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Publication number
JP4501285B2
JP4501285B2 JP2001028309A JP2001028309A JP4501285B2 JP 4501285 B2 JP4501285 B2 JP 4501285B2 JP 2001028309 A JP2001028309 A JP 2001028309A JP 2001028309 A JP2001028309 A JP 2001028309A JP 4501285 B2 JP4501285 B2 JP 4501285B2
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Prior art keywords
glass
melting
chamber
melting furnace
air supply
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Japanese (ja)
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JP2002234734A (en
Inventor
昭 大野
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IHI Corp
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IHI Corp
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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
    • C03B5/02—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating
    • C03B5/027—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating by passing an electric current between electrodes immersed in the glass bath, i.e. by direct resistance heating
    • C03B5/0275—Shaft furnaces
    • 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
    • C03B5/005—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture of glass-forming waste materials

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Gasification And Melting Of Waste (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、高放射性廃液ガラス固化施設に設置されるガラス溶融炉に関する。
【０００２】
【従来の技術】
原子力施設において発生する高放射性廃液は、高放射性廃液ガラス固化施設のガラス溶融炉により溶融し、ガラス固化体として処理された後、放射性廃棄物保管施設に保管される。
【０００３】
上記のガラス固化施設においては、ガラス溶融炉の内部で原料ガラスを溶融する際に高放射性廃液を混入し、この高放射性廃液が混入した溶融ガラスを固化容器に注入し、溶融ガラスを固化させることにより、ガラス固化体を形成している。
【０００４】
図２は従来のガラス溶融炉の一例を示す縦断正面図、図３は図２の縦断側面図であり、図２、図３において２は溶融炉本体であり、該溶融炉本体２は、内部に溶融空間１を形成するように耐蝕性の耐火レンガ２ａにて構成されている。
【０００５】
溶融炉本体２の上下中間部左右側には、主電極３が対向して設けられていてその内端が溶融空間１に突出しており、又溶融空間１下部の狭くなっている炉底部４には、底部電極５が設けられていてその内端が溶融空間１に突出している。図２、図３において、６は溶融炉本体２の上部に設けられて原料ガラス、高放射性廃液等を供給するための原料供給口、７は廃ガス取出管、８は廃ガス処理装置、９は補助電極、１０は炉底部４に形成されて溶融されたガラスを取り出すためのガラス取出口、１１はガラス取出口１０を加熱するためのヒータ、Ｇは溶融ガラスである。
【０００６】
上記ガラス溶融炉では、溶融炉本体２に形成された溶融空間１（以下溶融室１と称す）に原料ガラス及び高放射性廃液を供給し、対向配置した主電極３，３間の通電（放電）によるジュール熱によって原料ガラスを溶融し、溶融室１底部のガラス取出口１０から溶融ガラスＧを取り出すようになっている。
【０００７】
【発明が解決しようとする課題】
ところで、溶融室１内におけるガラスは静止した状態にあリ、そのために主電極３，３による加熱時における熱の伝達率は比較的低い状態にある。又、溶融室１の上面には、仮焼層１２が形成されており、この仮焼層１２は、溶融室１の上部空間への熱の伝達を抑制してしまい、このために、仮焼層１２の上部に供給されてくる原料ガラスへの熱の伝達が押えられて、溶融効率が低下する問題があった。
【０００８】
このため、従来では、ガラス溶融炉における処理量、即ち原料ガラスの溶融処理量は、溶融室１の容積（特に溶融ガラスＧの上面の面積）に略比例するとされている。従って、処理量を増やすためには、ガラス溶融炉全体を大型化することが考えられる。
【０００９】
しかし、ガラス溶融炉が大型化すると、それを構築するための耐食性の耐火レンガ２ａの使用量が増大し、更にガラス溶融炉を納める建屋、及びクレーン等のハンドリング装置も大型化するために、建設コストが大幅に増加するという問題がある。
【００１０】
本発明は、設備構成を大型化することなく処理能力を向上させることが可能なガラス溶融炉を提供することを目的とする。
【００１１】
【課題を解決するための手段】
本発明は、高放射能性廃液ガラス固化施設に設置されるガラス溶融炉において、溶融炉本体に、原料ガラスの溶融を行う溶融室と、この溶融室と底部で連通する側室とを設け、さらにガラス固化施設の外部から前記側室の上部空間に加圧空気を送り込む撹拌空気供給装置を設けており、該撹拌空気供給装置が、ガラス固化施設の外部から側室の上部空間に加圧空気を供給する空気供給管と、該空気供給管から分岐して溶融室の上部空間に連通する空気逃がし管と、前記空気供給管に配置した第１調整弁と、前記空気逃がし管に配置した第２調整弁とを備えていることを特徴とするガラス溶融炉、に係るものである。
【００１３】
溶融室内において、溶融ガラス表面に形成される仮焼層を含めて、その下方の溶融ガラス全域を効率よく加熱することができれば、処理速度を高めて処理量を増やすことができる。
【００１４】
本発明ではこのような観点から、溶融室内の溶融ガラスを攪拌するようにしている。即ち、側室の上部空間に加圧空気を送って、側室内の溶融ガラス面を押し下げる。すると、側室の底部は溶融室に繋がっているために、側室内の溶融ガラスが連通路を通って溶融室に流入し、これにより、溶融室内の溶融ガラスに流動が生じる。
【００１５】
又、第１調整弁と第２調整弁の開閉を制御して、空気逃がし管により側室の上部空間に供給された加圧空気を溶融室の上部空間に逃がすと、溶融室の溶融ガラスの一部が側室に戻るように流動し、溶融室の溶融ガラス面は下降する。上記操作を繰返すと、溶融ガラスが溶融室と側室との間を繰り返し流動することによって熱伝達係数が高まり、よって仮焼層を含めて溶融ガラス全域に熱が速やかに伝わり、処理速度が向上する。
【００１６】
【発明の実施の形態】
以下、本発明の実施の形態を図面に従って説明する。
【００１７】
図１は本発明の実施の形態に係るガラス溶融炉の縦断正面図である。図中、図２、図３と同一のものには同一の符号を付して詳細な説明は省略する。
【００１８】
ガラス固化施設１３の内部に、ガラス溶融炉の溶融炉本体１４を備えている。溶融炉本体１４は、原料ガラスの溶融を行う溶融室１と、溶融室１内の溶融ガラスＧを流動（攪拌）させるための側室１５とを備えている。
【００１９】
溶融室１の底部近傍の側部と、側室１５の底部とは、連通路１６で繋がっている。溶融室１には、紙面と鉛直の方向に対向する主電極３が設けられていて、主電極３，３間での通電（放電）によりジュール熱で、原料ガラスの溶融を行うようになっている。又側室１５にも、電気ヒータ１７を設けて側室１５内の溶融ガラスＧを加熱し、溶融ガラスＧの温度が低下して固まらないようにしている。
【００２０】
溶融室１と側室１５は連通路１６で繋がっているため、通常では両方の溶融ガラス面の高さは等しくなっている。又溶融室１の底部にはガラス取出口１０が設けられており、該ガラス取出口１０を取り囲むように底部電極５が設けられている。
【００２１】
ガラス固化施設１３の外方には、空気槽（アキュムレータ）１８が設けてあり、該空気槽１８には、前記溶融炉本体１４に加圧空気（圧縮空気）を送って溶融ガラスＧの撹拌を行うようにした撹拌空気供給装置１９が接続されている。
【００２２】
前記撹拌空気供給装置１９は、前記ガラス固化施設１３の外部の空気槽１８から側室１５の上部空間に加圧空気を供給する空気供給管２０と、該空気供給管２０から分岐して溶融室１の上部空間に連通する空気逃がし管２１と、前記空気供給管２０に配置した第１調整弁２２と、前記空気逃がし管２１に配置した第２調整弁２３とを備えている。又、空気供給管２０におけるガラス固化施設１３の外側には、手動安全弁２４が設けてあり、さらに空気槽１８の上流側には元弁２５が設けてある。
【００２３】
次に、上記形態例の作動を説明する。
【００２４】
溶融室１の上方から原料ガラス及び高放射性廃液を供給し、対向配置されている主電極３，３間での通電（放電）によるジュール熱により原料ガラスを溶融する。
【００２５】
ここで、第１調整弁２２を閉じ、元弁２５を開くことで空気槽１８に加圧空気を溜める。その後、元弁２５と第２調整弁２３を閉じ、第１調整弁２２を開くと、空気槽１８内の加圧空気は、空気供給管２０を通って、側室１５の上部空間に供給される。
【００２６】
すると、側室１５の溶融ガラスＧ面は、加圧空気によって所定の高さＬ1（破線の位置）まで押し下げられ、これにより、側室１５の溶融ガラスＧが連通路１６を通って溶融室１に移動することにより溶融室位置に流動Ｓが生じ、溶融室１内の溶融ガラスＧ面は所要高さＬ2（破線の位置）まで上昇する。
【００２７】
次に、第２調整弁２３を開いて、側室１５内の加圧空気を溶融室１の上部空間に逃がすと、溶融室１の溶融ガラスＧの一部が側室１５に戻るように流動し、溶融室１の溶融ガラスＧ面は下降する。この時、側室１５内の加圧空気を溶融室１に逃がすようにしているので、汚染した加圧空気を別個に処理することなく、溶融室１の上部空間のガスと一緒に処理することができる。
【００２８】
上記操作を繰返すことにより、溶融ガラスＧが溶融室１と側室１５との間を繰り返し移動することになり、このときの流動Ｓによって、溶融室１内の溶融ガラスＧが有効に撹拌され、よって主電極３の通電によるジュール熱が速やかに溶融ガラスＧの全域に伝わり、よって、図２、図３に示した仮焼層１２に対する伝熱も上昇し、この結果、溶融炉本体１４による処理速度が高められて処理量を増加することができる。又、前記撹拌空気供給装置１９では、ガラス固化施設１３の外部において、元弁２５と、第１調整弁２２と、第２調整弁２３の開閉を行うのみの簡単な操作によって、溶融ガラスＧを効果的に撹拌できる。
【００２９】
このように、溶融ガラスＧを撹拌することによって、溶融炉本体１４による処理量を増加でき、よって、従来と同一の処理量を処理する場合には、溶融炉本体１４の構成を従来に比して著しく小型化できることになる。
【００３０】
【発明の効果】
以上説明したように本発明によれば、側室上方に加圧空気を送って側室内の溶融ガラス面を押し下げることにより、側室と繋がっている溶融室に溶融ガラスの流動を生じさせ、又側室の上部空間に供給された加圧空気を溶融室の上部空間に逃がすことにより、溶融室の溶融ガラスを側室に戻すという操作を繰返すことにより、溶融ガラスが溶融室と側室との間を繰り返し流動して熱伝達係数が高まり、よって仮焼層を含め溶融ガラス全域に熱が速やかに伝わることになり、処理速度が高められて処理量を増加することができる効果がある。
【００３１】
このように、溶融炉本体による処理量を増加できることにより、従来と同一の処理量を処理する場合には、溶融炉本体の構成を従来に比して著しく小型化できる効果がある。
【図面の簡単な説明】
【図１】本発明の実施の形態に係るガラス溶融炉の縦断正面図である。
【図２】従来のガラス溶融炉の一例を示す縦断正面図である。
【図３】図２の縦断側面図である。
【符号の説明】
１ 溶融室（溶融空間）
１３ ガラス固化施設
１４ 溶融炉本体
１５ 側室
１９ 撹拌空気供給装置
２０ 空気供給管
２１ 空気逃がし管
２２ 第１調整弁
２３ 第２調整弁
Ｇ 溶融ガラス
Ｓ 流動[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a glass melting furnace installed in a highly radioactive waste liquid vitrification facility.
[0002]
[Prior art]
The high radioactive waste liquid generated in the nuclear facility is melted by the glass melting furnace of the high radioactive waste liquid glass solidification facility, treated as a glass solid, and then stored in the radioactive waste storage facility.
[0003]
In the above-mentioned glass solidification facility, when the raw glass is melted inside the glass melting furnace, the high radioactive waste liquid is mixed, and the molten glass mixed with this high radioactive waste liquid is injected into the solidification container to solidify the molten glass. Thus, a vitrified body is formed.
[0004]
FIG. 2 is a longitudinal front view showing an example of a conventional glass melting furnace, FIG. 3 is a longitudinal side view of FIG. 2, and in FIGS. 2 and 3, 2 is a melting furnace body. It is comprised with the corrosion-resistant firebrick 2a so that the fusion | melting space 1 may be formed in this.
[0005]
On the left and right sides of the upper and lower middle part of the melting furnace body 2, a main electrode 3 is provided to face the inner end of the melting furnace body 2, and its inner end protrudes into the melting space 1. Is provided with a bottom electrode 5 whose inner end protrudes into the melting space 1. 2 and 3, 6 is a raw material supply port for supplying raw glass, highly radioactive waste liquid, etc. provided on the upper part of the melting furnace body 2, 7 is a waste gas take-out pipe, 8 is a waste gas treatment device, 9 Is an auxiliary electrode, 10 is a glass outlet for taking out the glass formed on the furnace bottom 4, 11 is a heater for heating the glass outlet 10, and G is molten glass.
[0006]
In the glass melting furnace, raw glass and highly radioactive liquid waste are supplied to a melting space 1 (hereinafter referred to as a melting chamber 1) formed in the melting furnace body 2 and energization (discharge) between the main electrodes 3 and 3 arranged opposite to each other. The raw glass is melted by the Joule heat generated by the above, and the molten glass G is taken out from the glass outlet 10 at the bottom of the melting chamber 1.
[0007]
[Problems to be solved by the invention]
By the way, the glass in the melting chamber 1 is in a stationary state, so that the heat transfer rate during heating by the main electrodes 3 and 3 is relatively low. In addition, a calcined layer 12 is formed on the upper surface of the melting chamber 1, and this calcined layer 12 suppresses the transfer of heat to the upper space of the melting chamber 1. There is a problem that the heat transfer to the raw glass supplied to the upper part of the layer 12 is suppressed and the melting efficiency is lowered.
[0008]
For this reason, conventionally, the processing amount in the glass melting furnace, that is, the melting processing amount of the raw glass, is assumed to be substantially proportional to the volume of the melting chamber 1 (particularly, the area of the upper surface of the molten glass G). Therefore, it is conceivable to increase the size of the entire glass melting furnace in order to increase the processing amount.
[0009]
However, as the size of the glass melting furnace increases, the amount of corrosion-resistant refractory bricks 2a used to construct the glass melting furnace increases, and the building that houses the glass melting furnace and the handling equipment such as cranes also increase in size. There is a problem that the cost is greatly increased.
[0010]
An object of this invention is to provide the glass melting furnace which can improve a processing capacity, without enlarging an equipment structure.
[0011]
[Means for Solving the Problems]
The present invention provides a glass melting furnace installed in a highly radioactive waste liquid glass solidification facility, the melting furnace body is provided with a melting chamber for melting the raw glass, and a side chamber communicating with the melting chamber at the bottom, An agitation air supply device that sends pressurized air from the outside of the vitrification facility to the upper space of the side chamber is provided , and the agitation air supply device supplies pressurized air to the upper space of the side chamber from the outside of the vitrification facility An air supply pipe, an air relief pipe branched from the air supply pipe and communicating with the upper space of the melting chamber, a first regulating valve arranged in the air supply pipe, and a second regulating valve arranged in the air relief pipe And a glass melting furnace characterized by comprising:
[0013]
In the melting chamber, if the entire molten glass underneath including the calcined layer formed on the surface of the molten glass can be efficiently heated, the processing rate can be increased and the processing amount can be increased.
[0014]
In the present invention, from such a viewpoint, the molten glass in the melting chamber is stirred. That is, pressurized air is sent to the upper space of the side chamber to push down the molten glass surface in the side chamber. Then, since the bottom part of the side chamber is connected to the melting chamber, the molten glass in the side chamber flows into the melting chamber through the communication path, thereby causing the molten glass in the melting chamber to flow.
[0015]
In addition, if the pressurized air supplied to the upper space of the side chamber is released to the upper space of the melting chamber by controlling the opening and closing of the first adjusting valve and the second adjusting valve, the molten glass in the melting chamber is discharged. The part flows back to the side chamber, and the molten glass surface of the melting chamber descends. When the above operation is repeated, the heat transfer coefficient is increased by the molten glass repeatedly flowing between the melting chamber and the side chamber, so that heat is quickly transmitted to the entire molten glass including the calcined layer, and the processing speed is improved. .
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0017]
FIG. 1 is a longitudinal sectional front view of a glass melting furnace according to an embodiment of the present invention. In the figure, the same components as those in FIGS. 2 and 3 are denoted by the same reference numerals, and detailed description thereof is omitted.
[0018]
A melting furnace body 14 of a glass melting furnace is provided inside the glass solidification facility 13. The melting furnace body 14 includes a melting chamber 1 for melting the raw glass and a side chamber 15 for flowing (stirring) the molten glass G in the melting chamber 1.
[0019]
The side part near the bottom of the melting chamber 1 and the bottom part of the side chamber 15 are connected by a communication path 16. The melting chamber 1 is provided with a main electrode 3 opposed to the paper surface in a vertical direction, and the raw glass is melted by Joule heat by energization (discharge) between the main electrodes 3 and 3. Yes. The side chamber 15 is also provided with an electric heater 17 to heat the molten glass G in the side chamber 15 so that the temperature of the molten glass G is not lowered and solidified.
[0020]
Since the melting chamber 1 and the side chamber 15 are connected by the communication path 16, the heights of both molten glass surfaces are usually equal. A glass outlet 10 is provided at the bottom of the melting chamber 1, and a bottom electrode 5 is provided so as to surround the glass outlet 10.
[0021]
An air tank (accumulator) 18 is provided outside the vitrification facility 13, and pressurized air (compressed air) is sent to the melting furnace body 14 in the air tank 18 to stir the molten glass G. An agitating air supply device 19 is connected.
[0022]
The stirring air supply device 19 includes an air supply pipe 20 that supplies pressurized air from an air tank 18 outside the vitrification facility 13 to an upper space of the side chamber 15, and a branch from the air supply pipe 20 to the melting chamber 1. An air relief pipe 21 that communicates with the upper space, a first regulating valve 22 disposed in the air supply pipe 20, and a second regulating valve 23 disposed in the air relief pipe 21. A manual safety valve 24 is provided outside the vitrification facility 13 in the air supply pipe 20, and a main valve 25 is provided upstream of the air tank 18.
[0023]
Next, the operation of the above embodiment will be described.
[0024]
The raw glass and the high radioactive waste liquid are supplied from above the melting chamber 1, and the raw glass is melted by Joule heat generated by energization (discharge) between the main electrodes 3 and 3 arranged opposite to each other.
[0025]
Here, the first adjusting valve 22 is closed, and the original valve 25 is opened, whereby the pressurized air is stored in the air tank 18. Thereafter, when the main valve 25 and the second adjustment valve 23 are closed and the first adjustment valve 22 is opened, the pressurized air in the air tank 18 is supplied to the upper space of the side chamber 15 through the air supply pipe 20. .
[0026]
Then, the molten glass G surface of the side chamber 15 is pushed down to a predetermined height L 1 (the position indicated by the broken line) by the pressurized air, whereby the molten glass G in the side chamber 15 passes through the communication path 16 into the melting chamber 1. By moving, a flow S is generated at the position of the melting chamber, and the surface of the molten glass G in the melting chamber 1 rises to the required height L 2 (position of the broken line).
[0027]
Next, when the second regulating valve 23 is opened and the pressurized air in the side chamber 15 is allowed to escape to the upper space of the melting chamber 1, the molten glass G in the melting chamber 1 flows so that part of the molten glass G returns to the side chamber 15, The molten glass G surface of the melting chamber 1 descends. At this time, since the pressurized air in the side chamber 15 is allowed to escape to the melting chamber 1, the contaminated pressurized air can be treated together with the gas in the upper space of the melting chamber 1 without being separately treated. it can.
[0028]
By repeating the above operation, the molten glass G repeatedly moves between the melting chamber 1 and the side chamber 15, and the molten glass G in the melting chamber 1 is effectively stirred by the flow S at this time. Joule heat due to energization of the main electrode 3 is quickly transferred to the entire area of the molten glass G, and thus heat transfer to the calcined layer 12 shown in FIGS. 2 and 3 is also increased. As a result, the processing speed by the melting furnace body 14 is increased. Can be increased to increase the throughput. Further, in the agitating air supply device 19, the molten glass G can be obtained by a simple operation of simply opening and closing the main valve 25, the first adjustment valve 22, and the second adjustment valve 23 outside the vitrification facility 13. Stir effectively.
[0029]
Thus, by stirring the molten glass G, the processing amount by the melting furnace main body 14 can be increased. Therefore, when processing the same processing amount as the conventional one, the structure of the melting furnace main body 14 is compared with the conventional one. Can be significantly reduced in size.
[0030]
【The invention's effect】
As described above, according to the present invention, by sending pressurized air to the upper side of the side chamber and pushing down the molten glass surface in the side chamber, the molten glass is caused to flow in the molten chamber connected to the side chamber. By letting the pressurized air supplied to the upper space escape to the upper space of the melting chamber, the operation of returning the molten glass in the melting chamber to the side chamber is repeated, so that the molten glass repeatedly flows between the melting chamber and the side chamber. Thus, the heat transfer coefficient is increased, so that heat is quickly transmitted to the entire molten glass including the calcined layer, and there is an effect that the processing speed can be increased and the processing amount can be increased.
[0031]
As described above, since the processing amount by the melting furnace body can be increased, there is an effect that the structure of the melting furnace body can be remarkably reduced as compared with the conventional case when processing the same processing amount as before.
[Brief description of the drawings]
FIG. 1 is a longitudinal front view of a glass melting furnace according to an embodiment of the present invention.
FIG. 2 is a longitudinal front view showing an example of a conventional glass melting furnace.
FIG. 3 is a longitudinal side view of FIG. 2;
[Explanation of symbols]
1 Melting chamber (melting space)
13 Vitrification Facility 14 Melting Furnace Body 15 Side Chamber 19 Stirring Air Supply Device 20 Air Supply Pipe 21 Air Relief Pipe 22 First Regulating Valve 23 Second Regulating Valve G Molten Glass S Flow

Claims (1)

高放射能性廃液ガラス固化施設に設置されるガラス溶融炉において、溶融炉本体に、原料ガラスの溶融を行う溶融室と、この溶融室と底部で連通する側室とを設け、さらにガラス固化施設の外部から前記側室の上部空間に加圧空気を送り込む撹拌空気供給装置を設けており、該撹拌空気供給装置が、ガラス固化施設の外部から側室の上部空間に加圧空気を供給する空気供給管と、該空気供給管から分岐して溶融室の上部空間に連通する空気逃がし管と、前記空気供給管に配置した第１調整弁と、前記空気逃がし管に配置した第２調整弁とを備えていることを特徴とするガラス溶融炉。In a glass melting furnace installed in a highly radioactive waste liquid glass solidification facility, a melting chamber for melting raw material glass and a side chamber communicating with the melting chamber at the bottom are provided in the melting furnace main body, and further the glass solidification facility An agitation air supply device that sends pressurized air from the outside to the upper space of the side chamber , and the agitation air supply device includes an air supply pipe that supplies the pressurized air from the outside of the vitrification facility to the upper space of the side chamber; An air relief pipe that branches off from the air supply pipe and communicates with the upper space of the melting chamber, a first adjustment valve that is arranged in the air supply pipe, and a second adjustment valve that is arranged in the air relief pipe. glass melting furnace, characterized in that there.
JP2001028309A 2001-02-05 2001-02-05 Glass melting furnace Expired - Fee Related JP4501285B2 (en)

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JP5267797B2 (en) * 2009-01-14 2013-08-21 株式会社Ｉｈｉ Glass melting furnace
KR101238800B1 (en) * 2011-09-19 2013-03-04 한국수력원자력 주식회사 Induction melter having asymmetric sloped bottom

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63295443A (en) * 1987-05-27 1988-12-01 Canon Inc Structure of outflow part for fused glass
JPH03223122A (en) * 1990-01-26 1991-10-02 Olympus Optical Co Ltd Method for continuously discharging molten glass at constant rate and apparatus therefor
JPH0556925U (en) * 1992-01-09 1993-07-30 動力炉・核燃料開発事業団 Glass melting furnace

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63295443A (en) * 1987-05-27 1988-12-01 Canon Inc Structure of outflow part for fused glass
JPH03223122A (en) * 1990-01-26 1991-10-02 Olympus Optical Co Ltd Method for continuously discharging molten glass at constant rate and apparatus therefor
JPH0556925U (en) * 1992-01-09 1993-07-30 動力炉・核燃料開発事業団 Glass melting furnace

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