JP4360158B2 - Glass melting furnace - Google Patents

Glass melting furnace Download PDF

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JP4360158B2
JP4360158B2 JP2003311129A JP2003311129A JP4360158B2 JP 4360158 B2 JP4360158 B2 JP 4360158B2 JP 2003311129 A JP2003311129 A JP 2003311129A JP 2003311129 A JP2003311129 A JP 2003311129A JP 4360158 B2 JP4360158 B2 JP 4360158B2
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melting furnace
glass
electrode
casing
melting
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JP2005075704A (en
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慶造 児嶋
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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
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/26—Outlets, e.g. drains, siphons; Overflows, e.g. for supplying the float tank, tweels
    • 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
    • C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls

Description

本発明はガラス溶融炉に関するものである。   The present invention relates to a glass melting furnace.

原子力施設等において発生する放射性物質は、放射性廃棄物保管施設にガラス固化体として保管するために溶融ガラスに混入させる必要があり、溶融ガラスはガラス溶融炉でガラスを溶融させることにより生成される。   A radioactive substance generated in a nuclear facility or the like needs to be mixed into molten glass in order to be stored as a vitrified body in a radioactive waste storage facility, and the molten glass is generated by melting glass in a glass melting furnace.

而して、従来のガラス溶融炉の一例は図２に示されている。図中、１はガラス溶融炉で、このガラス溶融炉１は、上下方向中間部から下方へ向かって水平開口断面が徐々に縮小する形状の溶融空間２を有し、且つ平面形状が矩形状の溶融炉本体３を備えている。   Thus, an example of a conventional glass melting furnace is shown in FIG. In the figure, reference numeral 1 denotes a glass melting furnace. The glass melting furnace 1 has a melting space 2 having a shape in which a horizontal opening cross section gradually decreases from an intermediate portion in the vertical direction downward, and has a rectangular planar shape. A melting furnace body 3 is provided.

溶融炉本体３の上部には、原料供給管６及び排気管５が溶融空間２に連通するように接続されている。   A raw material supply pipe 6 and an exhaust pipe 5 are connected to the upper part of the melting furnace body 3 so as to communicate with the melting space 2.

溶融炉本体３には、溶融空間２の上下方向中間部で対向配置された一対の主電極７と、溶融空間２の底部近傍において主電極７に対し位相を９０度ずらして対向配置された一対の補助電極８とが、溶融炉本体３を水平方向に貫通して一端が溶融空間２に貯留された溶融ガラスＧに曝されるよう設けられている。又、溶融炉本体３の下部には、主電極７との間で通電するための底部電極１８及び溶融空間２に連通する流下ノズル９が設けられている。   In the melting furnace body 3, a pair of main electrodes 7 arranged opposite to each other in the middle in the vertical direction of the melting space 2, and a pair arranged opposite to each other with a phase shifted by 90 degrees with respect to the main electrode 7 near the bottom of the melting space 2 The auxiliary electrode 8 is provided so as to be exposed to the molten glass G penetrating the melting furnace body 3 in the horizontal direction and having one end stored in the melting space 2. A bottom electrode 18 for energizing the main electrode 7 and a flow-down nozzle 9 communicating with the melting space 2 are provided at the lower portion of the melting furnace body 3.

溶融炉本体３の主電極７の周りの構造は、図２において詳細な断面で示されている。すなわち、主電極７の周囲近傍において、溶融炉本体３は、溶融空間２に面した側に耐火煉瓦１０を備えており、耐火煉瓦１０の溶融空間２とは反対側には、壁状に配置した耐火煉瓦１１が設けられている。   The structure around the main electrode 7 of the melting furnace body 3 is shown in detail in FIG. That is, in the vicinity of the periphery of the main electrode 7, the melting furnace body 3 includes a refractory brick 10 on the side facing the melting space 2, and is disposed in a wall shape on the opposite side of the refractory brick 10 from the melting space 2. Refractory brick 11 is provided.

耐火煉瓦１１の耐火煉瓦１０とは反対側には、キャスタブル１２が充填されており、キャスタブル１２の耐火煉瓦１１とは反対側には、壁状の断熱ボード１３が設けられている。又、断熱ボード１３の外側は鋼板製のケーシング１４により包囲されている。   A castable 12 is filled on the opposite side of the refractory brick 11 to the refractory brick 10, and a wall-like heat insulating board 13 is provided on the opposite side of the castable 12 to the refractory brick 11. Further, the outside of the heat insulating board 13 is surrounded by a casing 14 made of steel plate.

主電極７は耐火煉瓦１０，１１、キャスタブル１２、断熱ボード１３、ケーシング１４を貫通し、その溶融空間２側端部は溶融空間２内に露出し、ケーシング１４側の端部はケーシング１４を貫通している。又、図中１５はケーシング１４の外側において蓋体１６に内嵌され、主電極７に外嵌されたパッキンである。   The main electrode 7 passes through the refractory bricks 10 and 11, the castable 12, the heat insulation board 13, and the casing 14, and its end on the melting space 2 side is exposed in the melting space 2, and the end on the casing 14 side passes through the casing 14. is doing. In the figure, reference numeral 15 denotes a packing that is fitted into the lid 16 outside the casing 14 and fitted to the main electrode 7.

上記ガラス溶融炉１においては、ガラス原料は原料供給管６から溶融空間２内に溶融している溶融ガラスＧに投入され、高レベル廃液は同じく原料供給管６から溶融空間２の溶融ガラスＧへ供給される。又、対向配置された一対の主電極７には電圧が印加されるため、溶融ガラスＧを通り主電極７，７間に電流が流れてジュール熱が発生し、供給されたガラス原料は加熱されて溶融される。ガラス原料が溶融する際に発生するガスは排気管５から排気される。   In the glass melting furnace 1, the glass raw material is charged from the raw material supply pipe 6 into the molten glass G melted in the melting space 2, and the high-level waste liquid is also supplied from the raw material supply pipe 6 to the molten glass G in the melting space 2. Supplied. In addition, since a voltage is applied to the pair of main electrodes 7 arranged opposite to each other, a current flows between the main electrodes 7 and 7 through the molten glass G to generate Joule heat, and the supplied glass raw material is heated. And melted. The gas generated when the glass raw material melts is exhausted from the exhaust pipe 5.

又、対向配置された一対の補助電極８，８間、及び主電極７と底部電極１８間にも電圧が印加されるため、補助電極８，８間、及び主電極７と底部電極１８間には電流が流れてジュール熱が発生する。このため、溶融空間２で溶融した溶融ガラスＧは、溶融空間２の下部で固化することなく円滑に流下し、流下ノズル９から下方へ排出されて、高レベル廃液と共に図示してない容器に収納される。   Further, since a voltage is also applied between the pair of auxiliary electrodes 8 and 8 arranged opposite to each other and between the main electrode 7 and the bottom electrode 18, the voltage is applied between the auxiliary electrodes 8 and 8 and between the main electrode 7 and the bottom electrode 18. Current flows and Joule heat is generated. Therefore, the molten glass G melted in the melting space 2 flows smoothly without solidifying in the lower part of the melting space 2, is discharged downward from the flow nozzle 9, and is stored in a container (not shown) together with the high-level waste liquid. Is done.

上記ガラス溶融炉１においては、主電極７は溶融炉本体３を構成する耐火煉瓦１０，１１、キャスタブル１２、断熱ボード１３、ケーシング１４を貫通しているため、溶融空間２で溶融した溶融ガラスＧは、主電極７の溶融炉本体３貫通部表面を伝わって流出する可能性があり、溶融ガラスＧがケーシング１４まで到達すると、主電極７とケーシング１４との間の絶縁が低下し、漏電を生ずる虞がある。   In the glass melting furnace 1, the main electrode 7 passes through the refractory bricks 10, 11, the castable 12, the heat insulation board 13, and the casing 14 that constitute the melting furnace body 3, so that the molten glass G melted in the melting space 2. May flow out through the surface of the main electrode 7 through the melting furnace main body 3 and when the molten glass G reaches the casing 14, the insulation between the main electrode 7 and the casing 14 is lowered, and electric leakage is caused. May occur.

なお、従来の一般的なガラス溶融炉としては、例えば特許文献１がある。
特開２００２−３２８１９７号公報 In addition, as a conventional general glass melting furnace, there exists patent document 1, for example.
JP 2002-328197 A

本発明は、上述の実情に鑑み、主電極等の電極の溶融炉本体に対する貫通部を通り溶融ガラスが溶融炉本体の外側面であるケーシングまで流出しないようにして、電極とケーシングとの間に漏電が生じることを防止し得るようにしたガラス溶融炉を提供することを目的としてなしたものである。   In view of the above-mentioned circumstances, the present invention prevents the molten glass from flowing out to the casing that is the outer surface of the melting furnace body through the penetration portion of the electrode such as the main electrode with respect to the melting furnace body, and between the electrode and the casing. The object of the present invention is to provide a glass melting furnace capable of preventing the occurrence of electric leakage.

請求項１のガラス溶融炉は、外周にケーシングを備えた溶融炉本体を水平方向へ貫通して一端が溶融空間内に露出し他端がケーシング外へ突出する電極の外周部に、前記溶融炉本体内に位置するよう、流出防止板を固設し、
前記流出防止板は、溶融空間から電極の表面を伝わって流出した溶融ガラスがケーシングに到達することを防止するように構成され、
前記電極はガラス原料を溶融させるための主電極であり、ケーシングは導電性であるものである。 The glass melting furnace according to claim 1, wherein the melting furnace body having a casing on the outer periphery extends in the horizontal direction, one end is exposed in the melting space, and the other end protrudes out of the casing on the outer periphery of the electrode. Secure the outflow prevention plate so that it is located inside the body,
The outflow prevention plate is configured to prevent the molten glass that has flowed out from the molten space along the surface of the electrode from reaching the casing ,
The electrode is a main electrode for melting the glass material, and the casing is conductive .

請求項２のガラス溶融炉は、溶融炉本体内において、流出防止板が電極の軸線方向へ複数個固設されているものである。   In the glass melting furnace according to claim 2, a plurality of outflow prevention plates are fixed in the axial direction of the electrode in the main body of the melting furnace.

本発明の請求項１〜２に記載のガラス溶融炉によれば、電極の溶融炉本体内における外周には流出防止板が溶接により固設されているため、例え溶融ガラスが流出防止板まで流出しても、更にケーシングまで流出するには流出防止板を迂回しなければならず、従って、溶融空間から電極の表面を伝わって流出した溶融ガラスがケーシングに到達することは殆どなく、その結果、漏電を生ずる虞が低下し、装置の信頼性が向上する、という優れた効果を奏し得る。 According to the glass melting furnace described in claims 1 and 2 of the present invention, since the outflow prevention plate is fixed to the outer periphery of the electrode in the melting furnace body by welding, for example, the molten glass flows out to the outflow prevention plate. However, in order to further flow out to the casing, it is necessary to bypass the outflow prevention plate, so that the molten glass that has flowed out from the molten space along the surface of the electrode hardly reaches the casing, and as a result, It is possible to obtain an excellent effect that the possibility of causing electric leakage is reduced and the reliability of the apparatus is improved.

以下、本発明の実施の形態を図示例と共に説明する。
図１は本発明を実施する形態の一例であって、図中、図２と同一の符号を付した部分は同一物を表わしている。而して、ガラス溶融炉の基本的な構成は図２に示す従来のものと同様であるが、本図示例の特徴とするところは、図１に示す如く、キャスタブル１２が充填された位置において、主電極７の外周を包囲するようにフランジ状の流出防止板１７を外嵌し、流出防止板１７と主電極７とを周方向に対する連続溶接により固設した点にある。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an example of an embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 2 denote the same components. Thus, the basic structure of the glass melting furnace is the same as that of the conventional one shown in FIG. 2, but the feature of this example is that the castable 12 is filled as shown in FIG. The flange-shaped outflow prevention plate 17 is externally fitted so as to surround the outer periphery of the main electrode 7, and the outflow prevention plate 17 and the main electrode 7 are fixed by continuous welding in the circumferential direction.

なお、ガラス溶融炉１の組立時には、キャスタブル１２は主電極７をキャスタブル１２の充填されていない状態の溶融炉本体３に取付けられた後で、モルタル状のキャスタブル１２が耐火煉瓦１１と断熱ボード１３との間の空間に充填される。   At the time of assembling the glass melting furnace 1, the castable 12 is attached to the melting furnace body 3 in a state where the main electrode 7 is not filled with the castable 12, and then the mortar-shaped castable 12 is replaced with the refractory brick 11 and the heat insulating board 13. The space between is filled.

次に、上記図示例の作動を説明する。
上記ガラス溶融炉１においては、主電極７は溶融炉本体３を構成する耐火煉瓦１０，１１、キャスタブル１２、断熱ボード１３、ケーシング１４を貫通しているため、溶融空間２で溶融した溶融ガラスＧは、主電極７の溶融炉本体３貫通部表面を伝わって、耐火煉瓦１０，１１、キャスタブル１２まで流出する虞がある。 Next, the operation of the illustrated example will be described.
In the glass melting furnace 1, the main electrode 7 passes through the refractory bricks 10, 11, the castable 12, the heat insulation board 13, and the casing 14 that constitute the melting furnace body 3, so that the molten glass G melted in the melting space 2. May flow through the surface of the main electrode 7 through the melting furnace main body 3 and flow out to the refractory bricks 10 and 11 and the castable 12.

しかし、主電極７の外周にはキャスタブル１２内で流出防止板１７が溶接により固設されているため、例え溶融ガラスＧがキャスタブル１２まで流出しても、更にケーシング１４まで流出するには流出防止板１７を迂回しなければならず、従って、溶融空間２から主電極７の表面を伝わって流出した溶融ガラスＧがケーシング１４に到達することは殆どなく、その結果、漏電を生ずる虞が低下し、装置の信頼性が向上する。   However, since the outflow prevention plate 17 is fixed to the outer periphery of the main electrode 7 by welding in the castable 12, even if the molten glass G flows out to the castable 12, the outflow prevention further prevents the outflow to the casing 14. Therefore, the molten glass G that has flowed out from the molten space 2 along the surface of the main electrode 7 hardly reaches the casing 14, and as a result, the possibility of causing electric leakage is reduced. The reliability of the device is improved.

なお、本発明のガラス溶融炉においては、１個の主電極に１枚の流出防止板を取付ける場合について説明したが、主電極の軸線方向（主電極が溶融炉本体を貫通する水平方向）へ複数枚取付けても実施可能なこと、主電極以外に補助電極等、溶融炉本体を貫通する全ての電極に適用可能なこと、その他、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。   In the glass melting furnace of the present invention, the case where one outflow prevention plate is attached to one main electrode has been described, but in the axial direction of the main electrode (the horizontal direction in which the main electrode penetrates the melting furnace main body). It can be implemented even when multiple sheets are attached, can be applied to all electrodes penetrating the main body of the melting furnace such as an auxiliary electrode in addition to the main electrode, and various other modifications can be made without departing from the scope of the present invention. Of course.

本発明のガラス溶融炉の実施の形態の一例を示す、主電極の近傍の断面を詳細に示す正面図である。It is a front view which shows in detail the cross section of the vicinity of the main electrode which shows an example of embodiment of the glass melting furnace of this invention. 従来のガラス溶融炉の一例を示す、主電極の近傍の断面を詳細に示す正面図である。It is a front view which shows an example of the conventional glass melting furnace in detail and shows the cross section of the vicinity of the main electrode.

符号の説明Explanation of symbols

１ ガラス溶融炉
２ 溶融空間
３ 溶融炉本体
７ 主電極（電極）
１４ ケーシング
１７ 流出防止板
Ｇ 溶融ガラス 1 Glass melting furnace 2 Melting space 3 Melting furnace body 7 Main electrode (electrode)
14 Casing 17 Outflow prevention plate G Molten glass

Claims (2)

外周にケーシングを備えた溶融炉本体を水平方向へ貫通して一端が溶融空間内に露出し他端がケーシング外へ突出する電極の外周部に、前記溶融炉本体内に位置するよう、流出防止板を固設し、
前記流出防止板は、溶融空間から電極の表面を伝わって流出した溶融ガラスがケーシングに到達することを防止するように構成され、
前記電極はガラス原料を溶融させるための主電極であり、ケーシングは導電性であることを特徴とするガラス溶融炉。 Outflow prevention so that the outer periphery of the electrode that penetrates the melting furnace body with the casing on the outer periphery in the horizontal direction, one end is exposed in the melting space, and the other end protrudes outside the casing is located in the melting furnace body Fix the board,
The outflow prevention plate is configured to prevent the molten glass that has flowed out from the molten space along the surface of the electrode from reaching the casing ,
The glass melting furnace, wherein the electrode is a main electrode for melting a glass raw material, and the casing is conductive . 溶融炉本体内において、流出防止板は電極の軸線方向へ複数個固設されている請求項１に記載のガラス溶融炉。   The glass melting furnace according to claim 1, wherein a plurality of outflow prevention plates are fixed in the axial direction of the electrode in the melting furnace body.
JP2003311129A 2003-09-03 2003-09-03 Glass melting furnace Expired - Fee Related JP4360158B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7660545B2 (en) 1995-03-27 2010-02-09 Canon Kabushiki Kaisha Coupling part, photosensitive drum, process cartridge and electrophotographic image forming apparatus
KR20170057157A (en) 2015-11-16 2017-05-24 주식회사 한국열기술 Melting furnace

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7660545B2 (en) 1995-03-27 2010-02-09 Canon Kabushiki Kaisha Coupling part, photosensitive drum, process cartridge and electrophotographic image forming apparatus
KR20170057157A (en) 2015-11-16 2017-05-24 주식회사 한국열기술 Melting furnace

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