JPH0979530A - Melting furnace - Google Patents
Melting furnaceInfo
- Publication number
- JPH0979530A JPH0979530A JP23384695A JP23384695A JPH0979530A JP H0979530 A JPH0979530 A JP H0979530A JP 23384695 A JP23384695 A JP 23384695A JP 23384695 A JP23384695 A JP 23384695A JP H0979530 A JPH0979530 A JP H0979530A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- sleeve
- furnace
- melting furnace
- disc
- 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.)
- Granted
Links
Landscapes
- Gasification And Melting Of Waste (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Details (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、灰溶融システム等
に適用される溶融炉に関する。TECHNICAL FIELD The present invention relates to a melting furnace applied to an ash melting system or the like.
【０００２】[0002]
【従来の技術】溶融炉の従来例を図２と図３により説明
する。図２にて炉本体２の下部にはスラグ出滓口９、上
部には排ガス出口１０がある。また上部の供給口には灰
供給機３がつながれている。下部には＋電極６が、上部
からは−電極（炭素電極）５が挿入されている。2. Description of the Related Art A conventional example of a melting furnace will be described with reference to FIGS. In FIG. 2, there is a slag outlet 9 at the bottom of the furnace body 2 and an exhaust gas outlet 10 at the top. An ash feeder 3 is connected to the upper feed port. A + electrode 6 is inserted in the lower part, and a-electrode (carbon electrode) 5 is inserted in the upper part.
【０００３】−電極の挿入部は図３に示すように、炉壁
２０に外端につばを持つスリーブ１１が設けられてい
る。その外側に、スリーブ１１の内径とほぼ同径の穴を
持つキャスタブル円板１２が同軸に設けられている。さ
らにその外側にグランドパッキン１４を持つ電極シール
部１３が同軸に設けられ、−電極５が挿入されている。As shown in FIG. 3, the insertion portion of the electrode is provided with a sleeve 11 having a flange at the outer end on the furnace wall 20. A castable disc 12 having a hole having substantially the same diameter as the inner diameter of the sleeve 11 is coaxially provided on the outer side thereof. Further, an electrode seal portion 13 having a gland packing 14 is coaxially provided on the outer side thereof, and the negative electrode 5 is inserted therein.
【０００４】電極シール部１３にはグランドパッキン１
４部を冷却するため冷却水入口１６と冷却水出口１７が
ある。図中１５はグランドパッキン押えである。The electrode seal portion 13 has a gland packing 1
There is a cooling water inlet 16 and a cooling water outlet 17 for cooling the four parts. In the figure, reference numeral 15 is a gland packing retainer.
【０００５】以上において、焼却灰１は、炉本体２の天
井に設置された灰供給機３により炉内へ投入され、Ｎ2
（窒素）ガス供給管４から−電極５を経て炉内へ供給さ
れたＮ2 ガスが−電極５と＋電極６との間でプラズマ化
され、そのプラズマアーク７により溶融される。さら
に、焼却灰１は溶融スラグ８となり、スラグ出滓口９よ
り流下する。また、排ガスは排ガス出口１０から炉外へ
排される。In the above, the incinerated ash 1 is introduced into the furnace by the ash feeder 3 installed on the ceiling of the furnace body 2, and N 2
The N 2 gas supplied from the (nitrogen) gas supply pipe 4 through the − electrode 5 into the furnace is turned into plasma between the − electrode 5 and the + electrode 6 and melted by the plasma arc 7. Further, the incinerated ash 1 becomes the molten slag 8 and flows down from the slag outlet 9. Further, the exhaust gas is exhausted from the exhaust gas outlet 10 to the outside of the furnace.
【０００６】このとき、炉内はＮ2 ガスで満たされてい
るが、炉外からの洩れ込み空気で生じる炭素分燃焼によ
る−電極５の消耗を抑制するために、−電極５は電極シ
ール部１３を介して挿入されている。更に電極シール部
１３には、冷却のため冷却水入口１６から冷却水出口１
７へと冷却水が流れている。At this time, the inside of the furnace is filled with N 2 gas, but in order to suppress the consumption of the electrode 5 due to the combustion of carbon content generated by the air leaking from the outside of the furnace, the electrode 5 has the electrode seal portion. It is inserted through 13. Further, the electrode seal portion 13 has a cooling water inlet 16 to a cooling water outlet 1 for cooling.
Cooling water is flowing to 7.
【０００７】また、図面には示されていないが、スラグ
出滓口９後方にはスラグ排出コンベアが設置されてお
り、これを含め系内はＮ2 ガスが充満し、系内は空気が
非常に少ない状態となっている。Although not shown in the drawing, a slag discharge conveyor is installed behind the slag outlet 9, and the inside of the system including the slag discharge conveyor is filled with N 2 gas, and the inside of the system is extremely filled with air. It is in a very small state.
【０００８】[0008]
【発明が解決しようとする課題】上記従来の溶融炉で
は、次のような問題点があった。 （１）灰中に含まれる酸素または炉本体覗窓他から炉内
へ洩れ込む少量の空気により、わずかながら−電極が消
耗し、−電極を徐々に炉内底面方向へ降下させていくこ
ととなるが、操業時間が長くなるに連れて、グランドパ
ッキンが損耗し、この部分からの炉内への空気の洩れ込
み量が大きくなり、−電極の消耗が激しくなり、場合に
よっては１１スリーブ付近の５−電極部が極部的に消耗
し、電極の昇降操作により電極が折れるという事態が発
生する。 （２） 炉内圧が＋のとき、この電極シール部と−電極
のスキ間から、炉内の高温ガスが炉外側へ流れ、溶融飛
灰がスリーブと−電極部に固着し、時間とともに−電極
の昇降が不能となる。 （３） スリーブ、キャスタブル円板、および電極シー
ル部がほぼ同一の径で少ないクリアランスで固定されて
いるため、長い操業時間で炉本体部材の熱伸び等により
−電極の挿入方向が鉛直方向からわずかにずれた場合、
−電極の昇降が不能となる。The above-mentioned conventional melting furnace has the following problems. (1) Oxygen contained in the ash or a small amount of air leaking into the furnace through the window of the furnace body etc. causes the electrode to be slightly consumed, and-the electrode is gradually lowered toward the bottom surface of the furnace. However, as the operation time increases, the gland packing wears, the amount of air leaking from this part into the furnace increases, and-the electrode wear becomes severe. 5-The electrode part is consumed locally, and the electrode may be broken by the lifting operation of the electrode. (2) When the pressure in the furnace is +, the high temperature gas in the furnace flows to the outside of the furnace from the gap between the electrode seal part and the-electrode, and the molten fly ash adheres to the sleeve and the-electrode part. Cannot be moved up and down. (3) Since the sleeve, castable disc, and electrode seal part are fixed with almost the same diameter and with a small clearance, due to thermal expansion of the furnace body member over a long operating time, the insertion direction of the electrode is slightly from the vertical direction. If it shifts to
-Elevation of the electrode is disabled.
【０００９】[0009]
【課題を解決するための手段】本発明は上記課題を解決
するため次の手段を講ずる。The present invention employs the following means to solve the above-mentioned problems.
【００１０】すなわち、溶融炉の炉壁に設けられ筒形で
外端につばを持ち同つば部に少くとも１つの径方向の窒
素ガス供給穴を有するスリーブと、同スリーブの外側に
同軸に配置され同スリーブの内径よりも小さい内径を持
つキャスタブル円板と、同キャスタブル円板の外側に同
軸に配置されグランドパッキンを持つシール部と、同シ
ール部に挿入されて上記グランドパッキンでシールされ
る電極とを設ける。That is, a sleeve provided on the furnace wall of the melting furnace and having a cylindrical outer edge and at least one radial nitrogen gas supply hole in the outer flange, and a sleeve arranged coaxially outside the sleeve. A castable disc having an inner diameter smaller than that of the sleeve, a seal portion coaxially arranged outside the castable disc and having a gland packing, and an electrode inserted in the seal portion and sealed by the gland packing. And.
【００１１】以上において、窒素ガス供給穴からＮ2 ガ
スが供給されながら運転される。するとグランドパッキ
ンが損耗した場合でも、Ｎ2 ガスの圧力により、グラン
ドパッキン部の炉内側は局部的に＋圧となり、外部から
炉内への空気の洩れ込みがなくなる。またＮ2 ガスによ
り電極のスリーブ部は覆われかつ冷却されるので、電極
の部分的な消耗の発生、それに伴う電極昇降時の電極の
折れの発生が防止される。In the above, the operation is performed while supplying N 2 gas from the nitrogen gas supply hole. Then, even if the gland packing is worn out, the pressure inside the gland packing part locally becomes + pressure due to the pressure of the N 2 gas, and air does not leak from the outside into the furnace. Further, since the sleeve portion of the electrode is covered and cooled by the N 2 gas, the partial consumption of the electrode and the accompanying breakage of the electrode when the electrode is moved up and down are prevented.
【００１２】溶融炉内圧が＋のときでも、Ｎ2 ガスのス
リーブ部での炉内方向への流れと冷却作用により、溶融
飛灰の進入および固着が防止される。また、スリーブの
内径はキャスタブル円板の内径よりも大きくなっている
ので、電極の挿入方向が、長い操業時間で溶融炉部材の
伸び等により、少しずれた場合でも、その移動がせるこ
となく行われる。Even when the internal pressure of the melting furnace is +, the inflow and sticking of the molten fly ash are prevented by the flow of N 2 gas toward the inside of the furnace and the cooling action in the sleeve portion. In addition, since the inner diameter of the sleeve is larger than the inner diameter of the castable disc, even if the insertion direction of the electrode is slightly displaced due to the elongation of the melting furnace member during a long operation time, it does not move. Be seen.
【００１３】[0013]
【発明の実施の形態】本発明の実施の一形態を図１によ
り説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIG.
【００１４】炉壁２０に外端につばａを持つ筒形のスリ
ーブ１１が設けられる。つばａには径方向のＮ2 供給穴
１８があけられＮ2 供給管１９につながれる。The furnace wall 20 is provided with a cylindrical sleeve 11 having a collar a at its outer end. A radial N 2 supply hole 18 is formed in the collar a and is connected to an N 2 supply pipe 19.
【００１５】スリーブ１１の外側に同軸にスリーブ１１
の内径よりも径の小さい穴を持つキャスタブル円板１２
が設けられてる。さらにその外側にグランドパッキン１
４を持つ電極シール部１３が同軸に設けられ、−電極５
が挿入されている。The sleeve 11 is coaxial with the outside of the sleeve 11.
Castable disk 12 with a hole smaller than the inner diameter of
Is provided. Gland packing 1 on the outside
The electrode seal portion 13 having 4 is provided coaxially, and-the electrode 5
Is inserted.
【００１６】電極シール部１３にはグランドパッキン１
４部を冷却するため冷却水入口１６と冷却水出口１７が
ある。図中１５はグランドパッキン押えである。The electrode seal portion 13 has a gland packing 1
There is a cooling water inlet 16 and a cooling water outlet 17 for cooling the four parts. In the figure, reference numeral 15 is a gland packing retainer.
【００１７】以上において、窒素ガス供給穴１８からＮ
2 ガスが供給されながら運転される。するとグランドパ
ッキン１４が損耗した場合でも、Ｎ2 ガスの圧力によ
り、グランドパッキン１４部の炉内側は局部的に＋圧と
なり、外部から炉内への空気の洩れ込みがなくなる。ま
たＮ2 ガスにより電極５のスリーブ１１部は覆われかつ
冷却されるので、電極５の部分的な消耗の発生、それに
伴う電極５昇降時の電極の折れの発生が防止される。In the above, from the nitrogen gas supply hole 18 to N
2 Operates while supplying gas. Then, even when the gland packing 14 is worn out, the pressure inside the gland packing 14 locally becomes a positive pressure due to the pressure of the N 2 gas, and air does not leak into the furnace from the outside. Further, since the sleeve 11 of the electrode 5 is covered and cooled by the N 2 gas, the partial consumption of the electrode 5 and the accompanying breakage of the electrode when the electrode 5 is moved up and down are prevented.
【００１８】溶融炉２の内圧が＋のときでも、Ｎ2 ガス
のスリーブ１１部での炉内方向への流れと冷却作用によ
り、スリーブ１１内部への溶融飛灰の進入および固着が
防止される。Even when the internal pressure of the melting furnace 2 is +, the inflow and fixation of the molten fly ash into the inside of the sleeve 11 are prevented by the flow of N 2 gas in the inside of the sleeve 11 and the cooling action. .
【００１９】また、スリーブ１１の内径はキャスタブル
円板１２の内径よりも大きくなっているので、電極５の
挿入方向が、長い操業時間で溶融炉部材の伸び等によ
り、少しずれた場合でも、その移動がせることなく行わ
れる。Further, since the inner diameter of the sleeve 11 is larger than the inner diameter of the castable disc 12, even if the inserting direction of the electrode 5 is slightly deviated due to the elongation of the melting furnace member or the like during a long operation time, that It is done without moving.
【００２０】[0020]
【発明の効果】以上に説明したように、本発明によれ
ば、スリーブに設けられた１つ以上のＮ 2 供給穴より、
電極挿入部へＮ2 ガスを吹き出すことにより、電極グラ
ンドパッキンが損耗した場合でも、炉内洩れ込み空気量
の増加による電極の消耗増加がなくなる。更に、挿入部
付近の電極の極部的な消耗及びそれに伴う電極昇降時の
電極の折れを防止できる。また、炉内圧が＋の時でも、
Ｎ2 ガスの吹き込みにより、溶融飛灰が冷却され、スリ
ーブ部への灰の固着が防止される。As described above, according to the present invention.
, One or more N on the sleeve 2From the supply hole,
To electrode insertion part N2By blowing out gas, the electrode graph
Even if the packing is worn, the amount of air leaking in the furnace
The increase in electrode wear due to the increase in Furthermore, the insertion part
When the electrode near the electrode is consumed locally and the electrode is moved up and down
It is possible to prevent breakage of the electrodes. Also, even when the furnace pressure is +,
N2The blown gas cools the molten fly ash and
Ashes are prevented from sticking to the tube.
【００２１】スリーブ内径を電極シール部及びキャスタ
ブル円板の内径より大きくしたことにより、電極の挿入
方向が長い操業時間で、炉本体部材の熱伸び等により、
軸方向からずれた場合でも、電極の挿入部でせることな
く移動できる。By making the inner diameter of the sleeve larger than the inner diameters of the electrode seal portion and the castable disc, the operation direction of the electrode is long, the thermal expansion of the furnace body member, etc.
Even when it is deviated from the axial direction, it can be moved without the insertion portion of the electrode.
【図１】本発明の実施の一形態の断面図である。FIG. 1 is a sectional view of an embodiment of the present invention.
【図２】従来例の構成断面図である。FIG. 2 is a configuration cross-sectional view of a conventional example.
【図３】同従来例の−電極挿入部の断面図である。FIG. 3 is a sectional view of a negative electrode insertion portion of the conventional example.
１ 焼却灰 ２ 炉本体 ３ 灰供給機 ４ Ｎ2 ガス供給管 ５ −電極（炭素電極） ６ ＋電極 ７ プラズマアーク ８ 溶融スラグ ９ スラグ出滓口 １０ 排ガス出口 １１ スリーブ １２ キャスタブル円板 １３ 電極シール部 １４ 電極グランドパッキン １５ 電極グランド押え １６ 電極シール部冷却水入口 １７ 電極シール部冷却水出口 １８ Ｎ2 供給穴 １９ Ｎ2 供給管 ２０ 炉壁1 incineration ash 2 furnace body 3 ash feeder 4 N 2 gas supply pipe 5-electrode (carbon electrode) 6 + electrode 7 plasma arc 8 molten slag 9 slag outlet 10 exhaust gas outlet 11 sleeve 12 castable disc 13 electrode seal part 14 electrode gland packing 15 electrode gland presser 16 electrode seal part cooling water inlet 17 electrode seal part cooling water outlet 18 N 2 supply hole 19 N 2 supply pipe 20 furnace wall
Claims (1)
ばを持ち同つば部に少くとも１つの径方向の窒素ガス供
給穴を有するスリーブと、同スリーブの外側に同軸に配
置され同スリーブの内径よりも小さい内径を持つキャス
タブル円板と、同キャスタブル円板の外側に同軸に配置
されグランドパッキンを持つシール部と、同シール部に
挿入されて上記グランドパッキンでシールされる電極と
を備えてなることを特徴とする溶融炉。1. A sleeve provided in the furnace wall of a melting furnace, having a cylindrical outer edge and at least one radial nitrogen gas supply hole in the outer edge, and a sleeve arranged coaxially outside the sleeve. A castable disc having an inner diameter smaller than that of the sleeve, a seal portion coaxially arranged outside the castable disc and having a gland packing, and an electrode inserted in the seal portion and sealed by the gland packing. And a melting furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23384695A JP3643624B2 (en) | 1995-09-12 | 1995-09-12 | Melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23384695A JP3643624B2 (en) | 1995-09-12 | 1995-09-12 | Melting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0979530A true JPH0979530A (en) | 1997-03-28 |
| JP3643624B2 JP3643624B2 (en) | 2005-04-27 |
Family
ID=16961492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23384695A Expired - Lifetime JP3643624B2 (en) | 1995-09-12 | 1995-09-12 | Melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3643624B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101466472B1 (en) * | 2013-03-13 | 2014-12-02 | 주식회사 한울엔지니어링 | Electrode assembly for high pressure and temperature reactor |
-
1995
- 1995-09-12 JP JP23384695A patent/JP3643624B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP3643624B2 (en) | 2005-04-27 |
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