JP2945398B1 - Tilt type plasma melting furnace - Google Patents
Tilt type plasma melting furnaceInfo
- Publication number
- JP2945398B1 JP2945398B1 JP27584598A JP27584598A JP2945398B1 JP 2945398 B1 JP2945398 B1 JP 2945398B1 JP 27584598 A JP27584598 A JP 27584598A JP 27584598 A JP27584598 A JP 27584598A JP 2945398 B1 JP2945398 B1 JP 2945398B1
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- furnace body
- tilting
- casing
- plasma melting
- 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.)
- Expired - Lifetime
Links
Landscapes
- Gasification And Melting Of Waste (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
【要約】
【課題】 溶湯排出の炉体傾動の際、炉付帯機器を切り
離すことがないようにした炉構造、炉底の吊り降ろしを
容易にした炉構造、さらには必要最小限の溶湯を容易に
残留させることができるようにした形状の炉底を備えた
傾動式プラズマ溶融炉を提供する。
【解決手段】 バウンダリを構成するケーシング１内に
炉体２が配され、この炉体２が上部炉体３と下部炉体４
とに水冷ジャケット５，６を介して分割され、下部炉体
４は上部炉体３との合わせ面近くで傾動可能にケーシン
グの内面側で枢支されると共に、下部炉体４の底部外面
に前記ケーシングの底に設けられた傾動用ジャッキ８の
上端が枢支されて成る傾動式プラズマ溶融炉。A furnace structure in which a furnace accessory device is not separated when a furnace body is tilted to discharge molten metal, a furnace structure in which a furnace bottom is easily suspended, and a minimum required amount of molten metal is easily facilitated. The present invention provides a tilting plasma melting furnace having a furnace bottom shaped so as to be able to remain in the furnace. SOLUTION: A furnace body 2 is arranged in a casing 1 constituting a boundary, and the furnace body 2 is composed of an upper furnace body 3 and a lower furnace body 4.
The lower furnace body 4 is pivotally supported on the inner surface side of the casing so as to be tiltable near the mating surface with the upper furnace body 3 and is provided on the bottom outer surface of the lower furnace body 4. A tilting plasma melting furnace in which the upper end of a tilting jack 8 provided at the bottom of the casing is pivotally supported.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、低レベル放射性雑
固体廃棄物の減容処理に用いる傾動式プラズマ溶融炉の
改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a tilting plasma melting furnace used for volume reduction of low-level radioactive miscellaneous solid waste.
【０００２】従来、定量の溶融物を排出固化するために
バッチ式に溶融処理を行う必要がある場合、例えば低レ
ベル放射性雑固体廃棄物を溶融処理する場合、及び炉内
に溶融物を残さず全量排出する必要がある場合に、固定
炉で低レベル放射性雑固体廃棄物を溶融し、炉傾動によ
り溶融物を排出する炉がある。先行技術文献として、例
えば特開平９−９００９５号公報に記載されている低レ
ベル放射性雑固体廃棄物処理設備中の溶融・酸化・分解
炉がある。[0002] Conventionally, when it is necessary to perform a melting process in a batch system to discharge and solidify a fixed amount of melt, for example, when melting low-level radioactive solid waste, and without leaving a melt in a furnace. There is a furnace that melts low-level radioactive miscellaneous solid waste in a fixed furnace and discharges the melt by tilting the furnace when it is necessary to discharge the entire amount. As a prior art document, there is, for example, a melting / oxidizing / decomposing furnace in a low-level radioactive miscellaneous solid waste treatment facility described in JP-A-9-90095.
【０００３】上記のように炉傾動により溶融物を排出す
る炉では、炉体を傾動する際には、不燃物や難燃物の供
給装置を切り離す操作が必要であり、その作業は非常に
煩雑であると共に、バウンダリを開放する危険性があ
る。前記の溶融・酸化・分解炉は、炉底部で支持され、
炉全体が一体に傾動する構造であるため、炉底の耐火物
のメンテナンス時には、炉蓋側を固定してからフランジ
を外し、炉底部を外して吊り降ろさなければならないの
で、作業が大がかりになる。また、排ガスダクトについ
ては、スイベルジョイントにより傾動支点と整合させる
ことにより、炉体から切り離す操作を回避しているが、
そのためにダクトの配置が複雑化し、取り合いも限定さ
れる。In the furnace for discharging the molten material by tilting the furnace as described above, when tilting the furnace body, it is necessary to perform an operation of disconnecting a device for supplying incombustible or non-combustible materials, which is very complicated. In addition, there is a risk of opening the boundary. The melting / oxidizing / decomposing furnace is supported at the bottom of the furnace,
Since the furnace as a whole is tilted together, the maintenance of the refractory on the furnace bottom requires fixing the furnace lid side, removing the flange, removing the furnace bottom, and hanging down the furnace, which increases the work. . In addition, the exhaust gas duct is aligned with the tilting fulcrum by a swivel joint to avoid the operation of disconnecting from the furnace body.
This complicates the arrangement of the ducts and limits the arrangement.
【０００４】一方、前記溶融・酸化・分解炉は、溶湯を
全量排出するために炉底が一方向に傾斜（約１０度の勾
配）しており、頻繁に炉を傾動して溶湯を排出するため
に、その都度電極及び周囲の電極用煉瓦がプラズマトー
チの熱に曝され、損傷する恐れがある。従って、出湯後
溶湯を一部炉底に残すことにより、電極及び周囲の電極
用煉瓦の保護を図る必要があるが、廃棄物の長時間溶融
は望ましくないので、炉底に残す溶湯は必要最小限にと
どめるべきで、１回の溶融に対しては、５％（１０リッ
トル）程度に抑えるのが妥当と考えられる。しかし、前
記溶融・酸化・分解炉では、溶湯を一部炉底に残すため
には、炉底を微速度で傾動して残留させるが、傾動運転
の面からみると、０．８リットル／ｍｍ降下程度とな
り、１０〜２０ｍｍのずれにより、８〜１６リットルの
変動が予想され、残留する溶湯の量がかなりばらつくこ
とが考えられる。On the other hand, in the melting, oxidation and decomposition furnace, the furnace bottom is inclined in one direction (a gradient of about 10 degrees) in order to discharge the entire amount of molten metal, and the furnace is frequently tilted to discharge the molten metal. Therefore, each time, the electrode and the surrounding electrode brick may be exposed to the heat of the plasma torch and may be damaged. Therefore, it is necessary to protect the electrodes and surrounding electrode bricks by leaving a part of the molten metal at the bottom of the furnace after tapping. However, it is not desirable to melt the waste for a long time. It is considered appropriate to limit the temperature to about 5% (10 liters) for one melting. However, in the melting / oxidizing / decomposing furnace, in order to leave a part of the molten metal at the bottom of the furnace, the bottom is tilted at a slow speed to remain. However, from the viewpoint of the tilting operation, 0.8 liter / mm is used. It will be about the descent, and a displacement of 10 to 20 mm is expected to fluctuate by 8 to 16 liters, and the amount of the remaining molten metal may vary considerably.
【０００５】残留溶湯を適正に制御するには、制御系を
精密にするか、傾動幅が大きくても量の変動を少なくす
るか、２つの方法が考えられる。この方法の内、コスト
の面から見れば、所定の傾動角度以上になったら、傾動
幅が大きくても量の変動を少なくなるようにするのが良
いと考える。[0005] To properly control the residual molten metal, two methods are conceivable: a precise control system or a small variation in the amount even if the tilt width is large. Among these methods, from the viewpoint of cost, it is considered that when the tilt angle becomes equal to or larger than a predetermined tilt angle, it is better to reduce the fluctuation of the amount even if the tilt width is large.
【０００６】[0006]
【発明が解決しようとする課題】そこで本発明は、溶湯
排出の炉体傾動の際、炉付帯機器を切り離すことがない
ようにした炉構造、炉底の吊り降ろしを容易にした炉構
造、さらには必要最小限の溶湯を容易に残留させること
ができるようにした形状の炉底を備えた傾動式プラズマ
溶融炉を提供しようとするものである。SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a furnace structure in which a furnace accessory is not separated when the furnace body is tilted for discharging molten metal, a furnace structure in which the furnace bottom is easily lowered and lowered, and An object of the present invention is to provide a tilting type plasma melting furnace having a furnace bottom having a shape capable of easily remaining a required minimum amount of molten metal.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
の本発明の傾動式プラズマ溶融炉の１つは、バウンダリ
を構成するケーシング内に炉体が配され、この炉体が上
部炉体と下部炉体とに水冷ジャケットを介して分割さ
れ、下部炉体は上部炉体との合わせ面近くで傾動可能に
ケーシングの内面側で枢支されると共に、下部炉体の底
部外面に前記ケーシングの底に設けられた傾動用ジャッ
キの上端が枢支されて成るものである。According to one aspect of the present invention, there is provided a tilting plasma melting furnace in which a furnace body is disposed in a casing constituting a boundary, and the furnace body is provided with an upper furnace body. The lower furnace body is divided into a lower furnace body via a water-cooled jacket, and the lower furnace body is pivotally supported on the inner surface side of the casing so as to be tiltable near a mating surface with the upper furnace body, and the casing of the casing is attached to the bottom outer surface of the lower furnace body. The upper end of the tilting jack provided on the bottom is pivotally supported.
【０００８】本発明の傾動式プラズマ溶融炉の他の１つ
は、上記の傾動式プラズマ溶融炉において、バウンダリ
を構成するケーシングが上下に分割され、上部ケーシン
グに対し下部ケーシングが上下動可能に且つ固定可能に
なされていることを特徴とするものである。In another tilting type plasma melting furnace according to the present invention, in the tilting type plasma melting furnace described above, a casing constituting a boundary is divided into upper and lower parts, and a lower casing is vertically movable with respect to an upper casing. It is characterized in that it can be fixed.
【０００９】本発明の傾動式プラズマ溶融炉のさらに他
の１つは、上記の各傾動式プラズマ溶融炉において、下
部炉体の傾斜炉底で電極上面及びその周辺部分が水平に
なされ、その電極上面の水平端から前記傾斜炉底に、そ
の傾斜角度よりも大きい傾斜角度の幅狭の傾斜溝が設け
られていることを特徴とするものである。In still another tilting plasma melting furnace according to the present invention, in each of the tilting plasma melting furnaces described above, the upper surface of the electrode and its peripheral portion are formed horizontally at the inclined furnace bottom of the lower furnace body, A narrow inclined groove having an inclination angle larger than the inclination angle is provided from the horizontal end of the upper surface to the inclined furnace bottom.
【００１０】[0010]
【発明の実施の形態】本発明の傾動式プラズマ溶融炉の
１つの実施形態を図によって説明すると、図１，２，３
において、１はバウンダリを構成するケーシングで、該
ケーシング１内にはプラズマ溶融炉の炉体２が配されて
おり、炉体２はケーシング１が溶接された上部炉体３と
下部炉体４とに水冷ジャケット５，６を介して分割さ
れ、下部炉体４は上部炉体３との合わせ面の外側でヒン
ジ７にて傾動可能に支持されると共に、下部炉体４の底
部外面に前記ケーシング１の底を貫通して設けられた２
本の傾動用ジャッキ８の摺動可能な上端８ａが夫々ヒン
ジ９にて結合され、下端の駆動軸１０がギャボックス１
１を介してブレーキ付ギャードモーター１２に連繋され
ている。下部炉体４の炉底１３は、傾動側に上向きに傾
斜していて、その端には溶融物排出口１４が設けられ、
その排出口１４の下方に溶融物受容固化容器１５が送り
込まれるフードシェル１６が設けられている。上部炉体
３には熱源としてプラズマトーチ１７が球面軸受１８に
て全方向に傾動可能に設けられ、これに対応して下部炉
体４の炉底１３には電極１９が設けられている。２０は
上部炉体３に設けられた排ガスダクトで、図示せぬ２次
燃焼室に連なっている。上部炉体３の上面には難燃物投
入装置２１と炉内部監視装置２２が設けられ、前記溶融
物排出口１４とは反対側の上部炉体３の側面には不燃物
導入口２３が設けられ、この不燃物導入口２３には炉側
より防熱ゲート２４とシールゲート２５が上下に開閉可
能に設けられている。尚、炉内に腐食性ガス（塩化水素
など）が存在することを考慮して、炉内に曝された部分
にはセラミック等の溶射を施すことが望ましい。また、
ケーシング１の内面には、下部炉体４が上部炉体３と離
れ、溶湯排出の傾動時に、高温の輻射から保護するため
に、輻射遮蔽板或いは耐火物施工等の防熱対策を講ずる
ことが望ましい。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the tilting type plasma melting furnace of the present invention will be described with reference to the drawings.
In the figure, reference numeral 1 denotes a casing constituting a boundary, in which a furnace body 2 of a plasma melting furnace is disposed, and the furnace body 2 comprises an upper furnace body 3 and a lower furnace body 4 to which the casing 1 is welded. The lower furnace body 4 is tiltably supported by a hinge 7 outside a surface where the lower furnace body 3 is joined with the upper furnace body 3, and the casing is provided on the bottom outer surface of the lower furnace body 4. 2 provided through the bottom of 1
The slidable upper ends 8a of the tilting jacks 8 are respectively connected by hinges 9, and the lower drive shaft 10 is
1 is connected to a geared motor 12 with a brake. The furnace bottom 13 of the lower furnace body 4 is inclined upward on the tilting side, and a melt discharge port 14 is provided at an end thereof,
A hood shell 16 is provided below the outlet 14 into which the melt receiving and solidifying container 15 is fed. A plasma torch 17 as a heat source is provided on the upper furnace body 3 so as to be tiltable in all directions by a spherical bearing 18. Correspondingly, an electrode 19 is provided on the furnace bottom 13 of the lower furnace body 4. Reference numeral 20 denotes an exhaust gas duct provided in the upper furnace body 3, which is connected to a secondary combustion chamber (not shown). A flame-retardant input device 21 and a furnace internal monitoring device 22 are provided on the upper surface of the upper furnace body 3, and an incombustible material inlet 23 is provided on a side surface of the upper furnace body 3 opposite to the melt discharge port 14. A heat-insulating gate 24 and a seal gate 25 are provided at the incombustible inlet 23 so as to be openable and closable up and down from the furnace side. In addition, in consideration of the presence of corrosive gas (such as hydrogen chloride) in the furnace, it is desirable to spray a ceramic or the like on the portion exposed to the furnace. Also,
On the inner surface of the casing 1, the lower furnace body 4 is separated from the upper furnace body 3, and it is preferable to take a heat shielding measure such as a radiation shielding plate or a refractory construction in order to protect against high-temperature radiation when the molten metal discharge is tilted. .
【００１１】上記のように構成された傾動式プラズマ溶
融炉において、２００リットルドラム缶Ｄに入った鉄，
コンクリート等の雑固体廃棄物（模擬廃棄物）を炉内に
装入すべく、ドラム缶Ｄを図示せぬ専用トレイに入れ、
不燃物導入口２３の防熱ゲート２４とシールゲート２５
を開いて、先端がフォークとなっている図示せぬプッシ
ャーで専用トレイごとドラム缶Ｄを炉内に押し込んだ。
そしてプッシャーを後退させ、防熱ゲート２４とシール
ゲート２５を閉じた後、プラズマトーチ（１．５ＭＷ）
１７によりドラム缶Ｄもろとも雑固体廃棄物（模擬廃棄
物）の溶融を開始した。約３０分で溶融完了後、一旦プ
ラズマを消し、同様に２本目，３本目のドラム缶Ｄを投
入し、溶融した。３本でおよそ８００ｋｇの雑固体廃棄
物を溶融したことにより、下部炉体４の傾斜炉底１３に
より形成された炉内溶融池が規定のレベルに達した。そ
こで、ブレーキ付ギャードモータ１２を駆動し、ギャボ
ックス１１を介して駆動軸１０を回転し、傾動用ジャッ
キ８を短縮して下部炉体４を傾動し、溶湯Ｍを溶融排出
口１４から予めフードシェル１６に送り込まれている固
化容器１５に排出した。そして下部炉体４を最大限傾動
（本例では１０度）して溶湯Ｍを全量排出し、固化容器
１５に受容した後、ブレーキ付ギャードモータ１２を逆
に駆動して下部炉体４の傾きを元の水平な状態に戻し
た。In the tilting-type plasma melting furnace having the above-described structure, iron contained in a 200-liter drum D
In order to load the miscellaneous solid waste (simulated waste) such as concrete into the furnace, the drum D is put into a special tray (not shown),
Heat insulation gate 24 and seal gate 25 at noncombustible material inlet 23
Was opened, and the drum D was pushed into the furnace together with the exclusive tray by a pusher (not shown) having a fork at the tip.
Then, the pusher is retracted, and the heat insulation gate 24 and the seal gate 25 are closed, and then the plasma torch (1.5 MW)
At 17, the melting of the miscellaneous solid waste (simulated waste) with the drum D was started. After melting was completed in about 30 minutes, the plasma was once extinguished, and the second and third drums D were similarly charged and melted. By melting about 800 kg of miscellaneous solid waste by three, the in-furnace molten pool formed by the inclined furnace bottom 13 of the lower furnace body 4 reached a specified level. Then, the gear motor 12 with a brake is driven, the drive shaft 10 is rotated via the gear box 11, the tilting jack 8 is shortened, the lower furnace body 4 is tilted, and the molten metal M is fed from the melting discharge port 14 to the hood shell in advance. The liquid was discharged to the solidification container 15 which was fed into the container 16. Then, the lower furnace body 4 is tilted to the maximum (in this example, 10 degrees) to discharge the entire amount of the molten metal M and received in the solidification container 15, and then the gear motor with brake 12 is driven in reverse to reduce the inclination of the lower furnace body 4. Returned to the original horizontal position.
【００１２】このように、上記実施形態の傾動式プラズ
マ溶融炉では、炉全体が傾動せず、排ガスダクト２０，
難燃物投入装置２１，炉内部監視装置２２などの炉付帯
機器を備えた上部炉体３が固定され、下部炉体４のみヒ
ンジ７を支点に傾動して、溶湯Ｍを排出できるので、溶
湯排出の際、従来のように炉付帯機器を炉体から切り離
す煩雑な作業を解消できる。また、下部炉体４の傾動は
バウンダリをなすケーシング１内で行われるので、炉内
はケーシング１内に開放されるだけで外部環境とは隔離
された状態を維持できる。従って、溶湯が低レベル放射
性雑固体廃棄物を溶融したものである場合、放射線漏洩
を防止できる。さらに、上部炉体３と下部炉体４の合わ
せ面（分割面）が水冷ジャケット５，６となっているの
で、廃棄物溶融時の熱による溶着が防止され、下部炉体
４の傾動に支障を来たすことがない。As described above, in the tilting type plasma melting furnace of the above embodiment, the entire furnace does not tilt, and the exhaust gas duct 20,
The upper furnace body 3 equipped with furnace auxiliary equipment such as the flame-retardant input device 21 and the furnace interior monitoring device 22 is fixed, and only the lower furnace body 4 can be tilted about the hinge 7 as a fulcrum to discharge the molten metal M. At the time of discharging, the complicated work of separating the furnace accessory from the furnace body as in the related art can be eliminated. Further, since the lower furnace body 4 is tilted in the casing 1 forming a boundary, the inside of the furnace can be maintained in a state of being isolated from the external environment only by being opened in the casing 1. Therefore, when the molten metal is obtained by melting low-level radioactive miscellaneous solid waste, radiation leakage can be prevented. Further, since the joining surfaces (divided surfaces) of the upper furnace body 3 and the lower furnace body 4 are water-cooled jackets 5 and 6, welding due to heat at the time of melting the waste is prevented, and the tilting of the lower furnace body 4 is hindered. Never come.
【００１３】次に本発明の傾動式プラズマ溶融炉の他の
１つの実施形態を図によって説明すると、前記実施形態
の傾動式プラズマ溶融炉におけるバウンダリを構成する
ケーシング１が図４に示すように上下に分割され、上部
ケーシング１ａに対して下部ケーシング１ｂが上下動可
能且つ固定可能になされている。即ち、分割された上部
ケーシング１ａと下部ケーシング１ｂがフランジ２６，
２７を介して接合され、上部ケーシング１ａのフランジ
２６から吊下ろし治具２８が下垂され、この吊下ろし治
具２８に下部ケーシング治具１ｂのフランジ２７が昇降
自在に遊合され、フランジ２７はフランジ２６に対しナ
ット２９にて締結固定されるようになっている。そし
て、この上下に分割されたケーシング１ａ，１ｂ内に配
されている上部炉体３と下部炉体４は、前記実施形態と
同様に水冷ジャケット５，６を介して分割されているも
のの、下部炉体４の傾動支点は、下部炉体４の外側面を
連結せる下部ケーシング１ｂの上部内側面に設けたブラ
ケット３０上のヒンジ３１となっている。その他前記実
施形態の傾動式プラズマ溶融炉と同一構成であるので、
同一物には同一符号を付してある。Next, another embodiment of the tilting type plasma melting furnace of the present invention will be described with reference to the drawings. As shown in FIG. The lower casing 1b is vertically movable and can be fixed to the upper casing 1a. That is, the divided upper casing 1a and lower casing 1b
27, a hanging jig 28 is hung down from a flange 26 of the upper casing 1a, and a flange 27 of the lower casing jig 1b is freely engaged with the hanging jig 28 so as to be able to move up and down. The nut 26 is fastened and fixed with a nut 29. The upper furnace body 3 and the lower furnace body 4 disposed in the upper and lower casings 1a and 1b are divided through the water cooling jackets 5 and 6 as in the above-described embodiment. The tilting fulcrum of the furnace body 4 is a hinge 31 on a bracket 30 provided on the upper inner side surface of the lower casing 1b connecting the outer side surfaces of the lower furnace body 4. Others have the same configuration as the tilting plasma melting furnace of the above embodiment,
The same components are denoted by the same reference numerals.
【００１４】このように構成された傾動式プラズマ溶融
炉は、前記実施形態の傾動式プラズマ溶融炉と同様の作
用効果を奏する他、バウンダリを構成するケーシング１
が上下に分割され、上部ケーシング１ａに対し下部ケー
シング１ｂが上下動可能且つ固定可能になされているの
で、下部ケーシング１ｂを上部ケーシング１ａから外し
て、即ち、ナット２９を緩めてフランジ２７を吊下ろし
治具２８に沿って下降して下部ケーシング１ｂを下降す
ることにより、該下部ケーシング１ｂに支持された下部
炉体４は一体に下降できる。従って、下部炉体４を容易
に吊下ろし搬出でき、メンテナンスが容易となる。The tilting plasma melting furnace thus configured has the same operation and effects as those of the tilting plasma melting furnace of the above-described embodiment, and also has a casing 1 forming a boundary.
Is divided into upper and lower parts, and the lower casing 1b can be moved up and down and fixed to the upper casing 1a. Therefore, the lower casing 1b is detached from the upper casing 1a, that is, the nut 29 is loosened to suspend the flange 27. By lowering along the jig 28 to lower the lower casing 1b, the lower furnace body 4 supported by the lower casing 1b can be integrally lowered. Therefore, the lower furnace body 4 can be easily suspended and carried out, and maintenance becomes easy.
【００１５】本発明の傾動式プラズマ溶融炉のさらに他
の１つの実施形態を図によって説明すると、前記各実施
形態の傾動式プラズマ溶融炉における下部炉体４の傾斜
炉底１３で図５，図６に示すように電極１９の上部を水
平にし、その水平端から前記傾斜炉底１３に、その傾斜
角度１０度より大きい傾斜角１３度の幅１００ｍｍの幅
狭の傾斜溝３２を設けたものである。その他は各実施形
態の傾動式プラズマ溶融炉と同一構成であるので、同一
物には同一符号を付してある。Another embodiment of the tilting type plasma melting furnace of the present invention will be described with reference to the drawings. The tilting furnace bottom 13 of the lower furnace body 4 in the tilting type plasma melting furnace of each of the above embodiments is shown in FIGS. As shown in FIG. 6, the upper part of the electrode 19 is made horizontal, and a narrow inclined groove 32 having a width of 100 mm and an inclination angle of 13 degrees larger than 10 degrees is provided in the inclined furnace bottom 13 from the horizontal end. is there. Other components are the same as those of the tilting plasma melting furnace of each embodiment, and therefore, the same components are denoted by the same reference numerals.
【００１６】このように構成された傾動式プラズマ溶融
炉は、前記実施形態の傾動式プラズマ溶融炉と同様の作
用効果を奏する他、下部炉体４の傾斜炉底１３に、その
傾斜炉底１３より大きい傾斜角の幅狭の傾斜溝３２を設
けているので、下部炉体４の傾斜炉底１３で低レベル放
射性雑固体廃棄物をプラズマ溶融して得た溶湯を排出す
べく下部炉体４を１０度傾動すると、傾斜角１３度の幅
狭の傾斜溝３２の部分から電極１９及びその周辺の煉瓦
の上部に約１２リットルの溶湯が残り、電極１９及びそ
の周辺の煉瓦が被われて保護される。尚、運用上下部炉
体４を１０度を少々超えて例えば１１度傾動しても、約
６リットルの溶湯が残留し、容易に必要最小限の溶湯を
残留させることができる。The tilting type plasma melting furnace constructed as described above has the same operation and effects as those of the tilting type plasma melting furnace of the above-described embodiment. Since the narrow inclined groove 32 having a larger inclined angle is provided, the lower furnace body 4 is discharged in order to discharge the molten metal obtained by plasma-melting the low-level radioactive miscellaneous solid waste at the inclined furnace bottom 13 of the lower furnace body 4. Is tilted by 10 degrees, about 12 liters of molten metal remains on the electrode 19 and the surrounding brick from the narrow inclined groove 32 with the inclination angle of 13 degrees, and the electrode 19 and the surrounding brick are covered and protected. Is done. Even if the operation upper and lower furnace body 4 is slightly tilted slightly more than 10 degrees, for example, 11 degrees, about 6 liters of molten metal remains, and the required minimum molten metal can be easily left.
【００１７】[0017]
【発明の効果】以上の説明で判るように請求項１の傾動
式プラズマ溶融炉は、溶湯排出の際、下記炉体のみ傾動
するので、上部炉体の付帯機器を切り離す煩雑な作業を
解消できる。また、下部炉体の傾動はバウンダリをなす
ケーシング内で行われ、炉内は外部環境と隔離されてい
るので、溶湯が低レベル放射性雑固体廃棄物を溶融した
ものである場合、放射線漏洩を防止できる。さらに、上
部炉体と下部炉体の合わせ面（分割面）が水冷ジャケッ
トとなっているので、廃棄物溶融時の熱による溶着が防
止され、下部炉体の傾動に支障を来たすことがない。As can be seen from the above description, the tilting type plasma melting furnace according to the first aspect tilts only the following furnace body at the time of discharge of the molten metal, so that the complicated work of separating the auxiliary equipment of the upper furnace body can be eliminated. . In addition, the lower furnace body is tilted in a casing that forms a boundary, and the inside of the furnace is isolated from the external environment, so if the molten metal is low-level radioactive miscellaneous solid waste, it prevents radiation leakage. it can. Furthermore, since the mating surface (divided surface) of the upper furnace body and the lower furnace body is a water-cooled jacket, welding due to heat at the time of melting the waste is prevented, and there is no hindrance to the tilting of the lower furnace body.
【００１８】また、請求項２の傾動式プラズマ溶融炉
は、上記の効果を有する他、バウンダリを構成するケー
シングが上下に分割され、上部ケーシングに対し下部ケ
ーシングが上下動可能且つ固定可能となっているので、
下部ケーシングを下降することにより、これに支持され
た下部炉体も一体に下降できる。従って、下部炉体を容
易に吊下ろし搬出でき、メンテナンスを容易に行うこと
ができる。In the tilting type plasma melting furnace according to the second aspect, in addition to the above effects, the casing constituting the boundary is vertically divided, and the lower casing is vertically movable and can be fixed to the upper casing. Because
By lowering the lower casing, the lower furnace body supported by the lower casing can also be lowered integrally. Therefore, the lower furnace body can be easily suspended and carried out, and maintenance can be easily performed.
【００１９】さらに、請求項３の傾動式プラズマ溶融炉
は、請求項１又は２の傾動式プラズマ溶融炉と同じ効果
を有する他、下部炉体の傾斜炉底に、その傾斜炉底より
大きい傾斜角の幅狭の傾斜溝を設けてあるので、溶湯を
排出すべく下部炉体を傾斜炉底が水平になるように傾斜
した際、溶湯が傾斜溝の部分から電極及びその周辺の煉
瓦上に残るので、電極及びその周辺の煉瓦が保護され
る。Further, the tilting type plasma melting furnace according to the third aspect has the same effect as the tilting type plasma melting furnace according to the first or second aspect. Since the inclined groove with a narrow corner is provided, when the lower furnace body is inclined so that the inclined furnace bottom is horizontal to discharge the molten metal, the molten metal is placed on the electrode and the brick around it from the inclined groove part Since it remains, the electrode and the surrounding bricks are protected.
【図１】本発明の傾動式プラズマ溶融炉の１つの実施形
態を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing one embodiment of a tilting type plasma melting furnace of the present invention.
【図２】図１の側断面図である。FIG. 2 is a side sectional view of FIG.
【図３】図１の平面図である。FIG. 3 is a plan view of FIG. 1;
【図４】本発明の傾動式プラズマ溶融炉の他の１つの実
施形態を示す要部縦断面図である。FIG. 4 is a vertical sectional view of a main part showing another embodiment of the tilting type plasma melting furnace of the present invention.
【図５】本発明の傾動式プラズマ溶融炉のさらに他の１
つの実施形態の要部を示す縦断面図である。FIG. 5 shows still another tilting type plasma melting furnace of the present invention.
It is a longitudinal section showing an important section of one embodiment.
【図６】図５の平面図である。FIG. 6 is a plan view of FIG. 5;
１ ケーシング １ａ 上部ケーシング １ｂ 下部ケーシング ２ 炉体 ３ 上部炉体 ４ 下部炉体 ５，６ 水冷ジャケット ８ 傾動用ジャッキ １３ 下部炉体の炉底 １９ 電極 ３２ 傾斜溝 Reference Signs List 1 casing 1a upper casing 1b lower casing 2 furnace body 3 upper furnace body 4 lower furnace body 5, 6 water cooling jacket 8 tilting jack 13 furnace bottom of lower furnace body 19 electrode 32 inclined groove
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｆ２７Ｂ 3/12 Ｆ２７Ｂ 3/12 Ｇ２１Ｆ 9/32 Ｇ２１Ｆ 9/32 Ｊ (72)発明者 林 昭彦 東京都千代田区内幸町２丁目２番３号 川崎製鉄株式会社内 (72)発明者 佐藤 稔也 東京都千代田区内幸町２丁目２番３号 川崎製鉄株式会社内 (56)参考文献 特開 平９−49616（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) G21F 9/30 F23G 5/00 F23G 7/00 F27B 3/12 ────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. 6 Identification code FI F27B 3/12 F27B 3/12 G21F 9/32 G21F 9/32 J (72) Inventor Akihiko Hayashi 2-chome Uchisaiwaicho, Chiyoda-ku, Tokyo No. 3 Kawasaki Steel Corporation (72) Inventor Toshiya Sato 2-3-2 Uchisaiwai-cho, Chiyoda-ku, Tokyo Kawasaki Steel Corporation (56) References JP-A-9-49616 (JP, A) (58) Surveyed field (Int.Cl. 6 , DB name) G21F 9/30 F23G 5/00 F23G 7/00 F27B 3/12
Claims (3)
体が配され、この炉体が上部炉体と下部炉体とに水冷ジ
ャケットを介して分割され、下部炉体は上部炉体との合
わせ面近くで傾動可能にケーシングの内面側で枢支され
ると共に、下部炉体の底部外面に前記ケーシングの底に
設けられた傾動用ジャッキの上端が枢支されて成る傾動
式プラズマ溶融炉。A furnace body is arranged in a casing constituting a boundary, and the furnace body is divided into an upper furnace body and a lower furnace body via a water-cooled jacket, and the lower furnace body is provided at a mating surface with the upper furnace body. A tilting type plasma melting furnace, wherein the tilting type plasma melting furnace is pivotally supported on an inner surface side of a casing so as to be tiltable nearby, and an upper end of a tilting jack provided on a bottom of the lower furnace body is pivotally supported.
おいて、バウンダリを構成するケーシングが上下に分割
されて、上部ケーシングに対し下部ケーシングが上下動
可能且つ固定可能になされていることを特徴とする傾動
式プラズマ溶融炉。2. The tilting plasma melting furnace according to claim 1, wherein a casing constituting the boundary is vertically divided, and a lower casing is movable up and down and can be fixed to an upper casing. Tilting plasma melting furnace.
融炉において、下部炉体の傾斜炉底で電極上面及びその
周辺部分が水平になされ、その電極上面の水平端から前
記傾斜炉底に、その傾斜角度よりも大きい傾斜角度の幅
狭の傾斜溝が設けられていることを特徴とする傾動式プ
ラズマ溶融炉。3. The tilting plasma melting furnace according to claim 1, wherein an upper surface of the electrode and a peripheral portion thereof are made horizontal at an inclined furnace bottom of the lower furnace body, and a horizontal end of the electrode upper surface extends to the inclined furnace bottom. A tilting type plasma melting furnace characterized by being provided with a narrow inclined groove having an inclination angle larger than the inclination angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27584598A JP2945398B1 (en) | 1998-09-29 | 1998-09-29 | Tilt type plasma melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27584598A JP2945398B1 (en) | 1998-09-29 | 1998-09-29 | Tilt type plasma melting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2945398B1 true JP2945398B1 (en) | 1999-09-06 |
| JP2000105296A JP2000105296A (en) | 2000-04-11 |
Family
ID=17561246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27584598A Expired - Lifetime JP2945398B1 (en) | 1998-09-29 | 1998-09-29 | Tilt type plasma melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2945398B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101837159B1 (en) | 2015-11-16 | 2018-04-19 | 주식회사 한국열기술 | Melting furnace having opening and closing apparatus and control method thereof |
-
1998
- 1998-09-29 JP JP27584598A patent/JP2945398B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000105296A (en) | 2000-04-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7695276B2 (en) | Furnace, its method of operating and control | |
| US3984613A (en) | Electric furnace with tiltable and removable hearth | |
| KR20010024634A (en) | Electric arc low-shaft smelting furnace with a central tube with telescopic electrodes and a sliding upper receptacle lid | |
| JP2945398B1 (en) | Tilt type plasma melting furnace | |
| US4328956A (en) | Taphole assembly and method of installation | |
| US3723631A (en) | Skull melting furnace with removable bottom and process for furnace operation | |
| JP3236885B2 (en) | Waste treatment equipment | |
| JPS631366B2 (en) | ||
| JPS6159368B2 (en) | ||
| JP2971872B1 (en) | Melt discharge method in melting furnace | |
| JP3111646B2 (en) | Ladle storage container | |
| JP3073851B2 (en) | Waste incineration melting treatment device and incineration melting treatment method | |
| JP3858358B2 (en) | Dismantling method of blast furnace hearth contents | |
| JP3212135B2 (en) | Refractory lining method for vacuum degassing equipment | |
| JP2544720Y2 (en) | Tuyere structure of gas injection nozzle for molten metal container | |
| RU2377325C2 (en) | Tank-casting mould of installation for receiving of ferrotitanium by means of electroarc melting of rutile under layer of protective flux | |
| US20230175779A1 (en) | Side-supported cantilever furnace roof | |
| JP2013503315A (en) | Movable sweat hearth for metal melting furnaces | |
| JPH0675746B2 (en) | Water-cooled ceiling lid for ladle | |
| JP2996961B1 (en) | Method and apparatus for charging miscellaneous solid waste in a melting furnace | |
| JPH0714352Y2 (en) | Tilt-type molten metal furnace | |
| RU2183803C1 (en) | Double-bath steel melting aggregate | |
| JPH08254306A (en) | Method and device for discharging metal in electric ash melting furnace | |
| JP3365927B2 (en) | Melt desulfurization method when tapping electric furnace | |
| JPH02238290A (en) | Arc electric furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313115 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080625 Year of fee payment: 9 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080625 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 10 Free format text: PAYMENT UNTIL: 20090625 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 10 Free format text: PAYMENT UNTIL: 20090625 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 11 Free format text: PAYMENT UNTIL: 20100625 |