JP3771505B2 - Incinerator bottom seal structure - Google Patents

Incinerator bottom seal structure Download PDF

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Publication number
JP3771505B2
JP3771505B2 JP2002056707A JP2002056707A JP3771505B2 JP 3771505 B2 JP3771505 B2 JP 3771505B2 JP 2002056707 A JP2002056707 A JP 2002056707A JP 2002056707 A JP2002056707 A JP 2002056707A JP 3771505 B2 JP3771505 B2 JP 3771505B2
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Prior art keywords
furnace
air
seal
furnace bottom
annular
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JP2002056707A
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JP2003254527A (en
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晋 松▲崎▼
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NGK Insulators Ltd
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NGK Insulators Ltd
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Description

【０００１】
【発明の属する技術分野】
本発明は、放射性廃棄物焼却炉のような負圧で運転される焼却炉の炉底シール構造に関するものである。
【０００２】
【従来の技術】
放射性廃棄物焼却炉は、放射性物質が誤って外部に漏れることを防止するために、炉内全体は常に負圧状態に保たれている。そしてその炉底部から焼却灰を取り出すための炉底ダンパの部分にも、放射性物質が外部に漏れることを防止するための炉底シール構造が設けられている。
【０００３】
図５〜図７は従来の放射性廃棄物焼却炉の炉底シール構造を示す図であり、図５において１は焼却炉の炉体、２は炉体１の底部に形成された灰取り出し用の開口部、３は水平軸４を中心として機械的に開閉される炉底ダンパである。炉底ダンパ３の外周のフランジ９上には、図６、図７に示される金属製の環状パッキン５が取り付けられている。この従来の環状パッキン５は周囲の数箇所に外部と連通する放射状のスリット６を備えている。
【０００４】
上記したように炉内は常に負圧に保たれているので、炉底ダンパ３を閉じた状態ではスリット６を通じて外部の空気が吸引され、炉底ダンパ３の周囲と炉体１との隙間に炉内に向かう空気流が形成される。この空気流がシール空気となり、炉内からの放射性物質の流出を防止している。またこのシール空気は炉底ダンパ３上に落下した燃焼物の燃焼用空気としての役割も持っている。なお、図５に示すように実際には炉底ダンパ３の下方には密封された灰取り出しボックス７が形成されており、スリット６を通じて灰取り出しボックス７内の空気が吸引される。灰取り出しボックス７には外気吸引ライン８が設けられており、灰取り出しボックス７内を換気して温度上昇を防止している。
【０００５】
上記のように、従来から放射性物質が外部に漏れることを防止する炉底シール構造が形成されていたのであるが、この従来構造には下記のような問題があった。
▲１▼ 環状パッキン５のスリット６の間隔が広いため、燃焼物とシール空気との接触不良が発生しやすく、未燃分が局部的に発生して炉底部に付着・堆積することがある。
▲２▼ 炉底部の灰付着・堆積状態によってはシール空気の偏流が起こりやすく、燃焼性への悪影響が更に進行する悪循環に陥ることがある。
▲３▼ ポリエチレンなどを焼却すると液状化し、スリット６に流下して閉塞させ、シール空気の流量が不足する場合がある。またこれに伴って灰取り出しボックス７内の換気も不十分となり、温度上昇を招く。
▲４▼ そこで毎月１回程度、炉底部に付着・堆積した未燃分や灰の清掃を行わねばならない。
【０００６】
【発明が解決しようとする課題】
本発明は上記した従来の問題点を解決し、炉底ダンパの外周からシール空気を常に安定供給することができ、未燃分や灰の付着・堆積を防止して炉底部の清掃頻度を大幅に減少させることができる焼却炉の炉底シール構造を提供するためになされたものである。
【０００７】
【課題を解決するための手段】
上記の課題を解決するためになされた本発明の焼却炉の炉底シール構造は、負圧で運転される焼却炉の炉底ダンパの外周に設けられた環状パッキン部分に、炉底ダンパの周囲から炉内に向けて均一に圧縮空気を噴出するシール空気供給手段を設けた炉底シール構造であって、炉底ダンパの外周のフランジ上に取りつけられた前記環状パッキンの内部には環状空気室を備え、この環状パッキンの内側面からこの環状空気室に連通する多数の空気噴出孔が均一に開口され、かつ、この環状空気室には、圧縮空気供給パイプが取り付けられるとともに、供給される圧縮空気は、この環状空気室を経て前記空気噴出孔から環状パッキンの内側に均一に噴出し、次いで、前記炉底ダンパの外周部分と炉体との間に形成されるシール空気噴出部からシール空気として炉内に流入するようにしたシール空気供給手段を設けたことを特徴とするものである。なお、炉底ダンパと炉体との間に形成されるシール空気噴出し部の隙間を調整し、シール空気の流速を１ｍ/ｓ以上とすることが好ましく、環状パッキンの先端を尖らせてシール部の面圧を１ＭＰａ以上とすることが好ましい。さらに、炉底ダンパの下方に形成される灰取り出しボックスに、独立した換気ラインを設けることが好ましい。
【０００８】
本発明の焼却炉の炉底シール構造においては、従来の炉内負圧を利用した外気吸引方式とは異なり、圧縮空気による強制シール方式を採用し、炉底ダンパの周囲から炉内に向けて均一に圧縮空気を供給するようにしたので、燃焼性が向上して未燃物の発生が抑制され、炉底部への灰の付着・堆積も低下させることができる。
【０００９】
【発明の実施の形態】
以下に本発明の好ましい実施形態を示す。
図１は本発明の炉底シール構造を備えた放射性廃棄物の焼却炉を示す断面図であり、従来と同様に１は焼却炉の炉体、２は炉体１の底部に形成された灰取り出し用の開口部、３は水平軸４を中心として機械的に開閉される炉底ダンパである。しかし炉底ダンパ３の外周のフランジ９上に取り付けられた金属製の環状パッキン１０は従来のものとは異なり、図２、図３に示すとおりの構造のものである。
【００１０】
すなわち、この環状パッキン１０は内部に環状空気室１１を備えたもので、その内壁面１２には環状空気室１１に連通する多数の空気噴出孔１３が均一に開口し、シール空気供給手段を形成している。この実施形態では直径２ｍｍの孔が全周に７２個形成されているが、その数や孔径は適宜設定すればよい。
【００１１】
図２に示すように、環状パッキン１０の環状空気室１１には炉底ダンパ３の開閉に対応できるフレキシブルパイプ１４を通じて、例えば０.５ＭＰａの圧縮空気が供給される。圧縮空気は空気噴出孔１３から環状パッキン１０の内側に均一に噴出し、さらに炉底ダンパ３と炉体１との間に形成されるシール空気噴出し部１５からシール空気として炉内に流入する。このシール用空気によって炉内からの放射性物質の漏洩を防止するとともに、このシール用空気が燃焼用空気となって炉底ダンパ３上の未燃物を燃焼させる。このような圧縮空気による強制シールは従来の外気吸引式のシールよりも強力であり、空気噴出孔１３の数を増加させたこととも相まって、未燃物の発生が確実に抑制され、炉底部への灰の付着・堆積も低下する。
【００１２】
なお、環状パッキン１０の内壁面１２の上部先端は炉体１の底部と接触するシール部１７となっているが、この実施形態ではこのシール部１７をとがらせてシール面圧を１ＭＰａ以上、実際には従来のシール面圧の１０倍に相当する３ＭＰａとしてある。このようにシール面圧を１ＭＰａ以上とすることにより、灰の噛み込みがなくなり確実なシールが可能となる。
【００１３】
また、炉底ダンパ３と炉体１との間に形成されるシール空気噴出し部１５の隙間を調整し、シール空気の流速を１ｍ/ｓ以上、実際には４ｍ/ｓとしてある。従来の外気吸引式のシールでは炉内外の圧力差が小さいためにシール空気の流速を０．６ｍ/ｓ以上とすることが難しかったが、本発明の強制シール方式ではシール空気の流速を１ｍ/ｓ以上とし、液状化したポリエチレンなどの流れ込みを確実に防止することができる。
【００１４】
なお、従来は灰取り出しボックス７内の空気が吸引され、外気吸引ライン８から流入する外気によって灰取り出しボックス７内を換気していたのであるが、本発明ではフレキシブルパイプ１４を通じて外部から圧縮空気が供給されるので、灰取り出しボックス７内の空気が吸引されることはない。そこで図１に示すようにシール空気供給系とは独立した換気ライン１６を設け、積極的に灰取り出しボックス７内を換気してその温度上昇を防止することが好ましい。
【００１５】
上記した実施形態では環状パッキン１０の底面側に環状空気室１１を形成し、下側から圧縮空気を供給するようにしたが、図４に示すように環状パッキン１０の上面側に環状空気室１１を形成し、フレキシブルパイプ１４を外周側に接続するようにしてもよい。この場合にも内壁面１２に多数の空気噴出孔１３を開口させ、均一にシール用空気を吹き込めるようにしておくものとする。このように環状パッキン１０の構造は実施形態のものに限定されることはない。
【００１６】
【発明の効果】
以上に説明したように、請求項１の発明によれば炉底ダンパの外周に設けられた環状パッキン部分に、炉底ダンパの周囲から炉内に向けて均一に圧縮空気を噴出するシール空気供給手段を設けたことによって、シール空気を常に安定供給することができ、未燃分や灰の付着・堆積を防止して炉底部の清掃頻度を大幅に減少させることができる。
【００１７】
また請求項２の発明によれば、炉底ダンパと炉体との間に形成されるシール空気噴出し部の隙間を調整し、シール空気の流速を１ｍ/ｓ以上としたことによって、液状化したポリエチレンなどの流れ込みを確実に防止することができ、シール空気噴出し部の閉塞によるシール空気不足を防止することができる。
【００１８】
また請求項３の発明によれば、環状パッキンの先端を尖らせてシール部の面圧を１ＭＰａ以上としたことによって、シール部への灰の噛み込みがなくなり、より確実なシールが可能となる。
【００１９】
さらに請求項４の発明によれば、炉底ダンパの下方に形成される灰取り出しボックスに独立した換気ラインを設けたことによって、積極的に灰取り出しボックス７内を換気し、その温度上昇を防止することができる。
【００２０】
本発明によれば、炉底部の確実なシールができることはもちろん、炉底部への未燃分や灰の付着・堆積を確実に防止して、従来は毎月１回必要であった炉底部の清掃頻度を、年１回程度にまで大幅に減少させることができる利点があり、清掃時間の短縮による放射線被曝の低減と設備稼働率の向上を図ることができる。
【図面の簡単な説明】
【図１】本発明の炉底シール構造を備えた放射性廃棄物の焼却炉を示す断面図である。
【図２】図１の要部の拡大断面図である。
【図３】環状パッキンの斜視図である。
【図４】他の実施形態を示す要部の拡大断面図である。
【図５】従来の炉底シール構造を備えた放射性廃棄物の焼却炉を示す断面図である。
【図６】図５の要部の拡大断面図である。
【図７】従来の環状パッキンの斜視図である。
【符号の説明】
１ 焼却炉の炉体、２ 灰取り出し用の開口部、３ 炉底ダンパ、４ 水平軸、５ 従来の環状パッキン、６ スリット、７ 灰取り出しボックス、８ 外気吸引ライン、９ 炉底ダンパの外周のフランジ、１０ 本発明の環状パッキン、１１ 環状空気室、１２ 内壁面、１３ 空気噴出孔、１４ フレキシブルパイプ、１５ シール空気噴出し部、１６ 換気ライン、１７ シール部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bottom seal structure of an incinerator operated at a negative pressure such as a radioactive waste incinerator.
[0002]
[Prior art]
In the radioactive waste incinerator, the entire interior of the furnace is always kept in a negative pressure state in order to prevent radioactive materials from accidentally leaking outside. A furnace bottom seal structure for preventing radioactive materials from leaking to the outside is also provided in the furnace bottom damper for taking out the incinerated ash from the furnace bottom.
[0003]
5 to 7 are diagrams showing a bottom seal structure of a conventional radioactive waste incinerator. In FIG. 5, 1 is a furnace body of the incinerator, and 2 is an ash removal unit formed at the bottom of the furnace body 1. The opening 3 is a furnace bottom damper that is mechanically opened and closed about the horizontal axis 4. An annular packing 5 made of metal shown in FIGS. 6 and 7 is attached on the flange 9 on the outer periphery of the furnace bottom damper 3. This conventional annular packing 5 is provided with radial slits 6 communicating with the outside at several places around the periphery.
[0004]
Since the inside of the furnace is always kept at a negative pressure as described above, outside air is sucked through the slit 6 when the furnace bottom damper 3 is closed, and the gap between the furnace bottom damper 3 and the furnace body 1 is sucked. An air flow toward the furnace is formed. This air flow becomes seal air, preventing the radioactive material from flowing out of the furnace. The seal air also serves as combustion air for the combustion products that have fallen on the furnace bottom damper 3. As shown in FIG. 5, a sealed ash take-out box 7 is actually formed below the furnace bottom damper 3, and air in the ash take-out box 7 is sucked through the slit 6. The ash take-out box 7 is provided with an outside air suction line 8, and the inside of the ash take-out box 7 is ventilated to prevent a temperature rise.
[0005]
As described above, a furnace bottom seal structure for preventing radioactive substances from leaking to the outside has been conventionally formed. However, this conventional structure has the following problems.
(1) Since the gap between the slits 6 of the annular packing 5 is wide, poor contact between the combustion products and the seal air is likely to occur, and unburned matter may be locally generated and deposited and deposited on the bottom of the furnace.
{Circle around (2)} Depending on the ash adhesion / deposition state at the bottom of the furnace, a drift of the sealing air is likely to occur, which may lead to a vicious circle in which the adverse effects on the combustibility further progress.
{Circle around (3)} When polyethylene or the like is incinerated, it liquefies and flows down to the slit 6 to be blocked, and the flow rate of the sealing air may be insufficient. Further, along with this, the ventilation in the ash take-out box 7 becomes insufficient, leading to a temperature rise.
(4) Therefore, it is necessary to clean the unburned matter and ash adhering to and depositing on the bottom of the furnace once a month.
[0006]
[Problems to be solved by the invention]
The present invention solves the above-mentioned conventional problems, can always stably supply seal air from the outer periphery of the furnace bottom damper, and prevents the adhesion and accumulation of unburned components and ash, greatly increasing the frequency of cleaning the furnace bottom. In order to provide a bottom seal structure for an incinerator that can be reduced to an incinerator.
[0007]
[Means for Solving the Problems]
The incinerator bottom seal structure of the incinerator of the present invention made to solve the above problems is provided around the periphery of the bottom bottom damper in an annular packing portion provided on the outer periphery of the bottom bottom damper of the incinerator operated at a negative pressure. A furnace bottom seal structure provided with sealing air supply means for uniformly jetting compressed air from the inside of the furnace to the inside of the furnace, wherein an annular air chamber is provided inside the annular packing attached on the outer peripheral flange of the furnace bottom damper A plurality of air ejection holes communicating with the annular air chamber from the inner side surface of the annular packing are uniformly opened, and a compressed air supply pipe is attached to the annular air chamber and the supplied compression is provided. Air is uniformly ejected from the air ejection hole to the inside of the annular packing through the annular air chamber, and then sealed from the sealing air ejection portion formed between the outer peripheral portion of the furnace bottom damper and the furnace body. In which characterized in that a sealing air supply means so as to flow into the furnace as a gas. In addition, it is preferable to adjust the clearance of the sealing air ejection part formed between the furnace bottom damper and the furnace body so that the flow velocity of the sealing air is 1 m / s or more, and the tip of the annular packing is sharpened to seal The surface pressure of the part is preferably 1 MPa or more. Furthermore, it is preferable to provide an independent ventilation line in the ash take-out box formed below the furnace bottom damper.
[0008]
In the bottom seal structure of the incinerator of the present invention, unlike the conventional outside air suction method using negative pressure in the furnace, a forced sealing method using compressed air is adopted, and the furnace bottom damper is directed from the periphery of the bottom bottom damper to the inside of the furnace. Since the compressed air is supplied uniformly, the flammability is improved, the generation of unburned material is suppressed, and the adhesion and accumulation of ash on the bottom of the furnace can be reduced.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention are shown below.
FIG. 1 is a cross-sectional view showing a radioactive waste incinerator having a furnace bottom seal structure according to the present invention. As in the prior art, 1 is a furnace body of an incinerator and 2 is an ash formed on the bottom of the furnace body 1. An extraction opening 3 is a furnace bottom damper that is mechanically opened and closed about a horizontal axis 4. However, the metal annular packing 10 mounted on the flange 9 on the outer periphery of the furnace bottom damper 3 is different from the conventional one and has a structure as shown in FIGS.
[0010]
That is, the annular packing 10 has an annular air chamber 11 therein, and a large number of air ejection holes 13 communicating with the annular air chamber 11 are uniformly opened on the inner wall surface 12 to form a sealing air supply means. is doing. In this embodiment, 72 holes having a diameter of 2 mm are formed on the entire circumference, but the number and the hole diameter may be set as appropriate.
[0011]
As shown in FIG. 2, for example, 0.5 MPa compressed air is supplied to the annular air chamber 11 of the annular packing 10 through a flexible pipe 14 that can cope with opening and closing of the furnace bottom damper 3. The compressed air is uniformly ejected from the air ejection hole 13 to the inside of the annular packing 10 and further flows into the furnace as seal air from a seal air ejection part 15 formed between the furnace bottom damper 3 and the furnace body 1. . The sealing air prevents leakage of radioactive materials from the inside of the furnace, and the sealing air becomes combustion air to burn unburned material on the furnace bottom damper 3. Such forced sealing with compressed air is stronger than the conventional outside air suction type seal, and coupled with the increase in the number of air ejection holes 13, the generation of unburned material is reliably suppressed, and the bottom of the furnace is reached. The adhesion and accumulation of ash is also reduced.
[0012]
The top end of the inner wall surface 12 of the annular packing 10 is a seal portion 17 that comes into contact with the bottom portion of the furnace body 1. In this embodiment, the seal portion 17 is broken so that the seal surface pressure is 1 MPa or higher. Is set to 3 MPa corresponding to 10 times the conventional seal surface pressure. By setting the seal surface pressure to 1 MPa or more in this way, ash biting is eliminated and reliable sealing is possible.
[0013]
Moreover, the clearance gap between the sealing air ejection portions 15 formed between the furnace bottom damper 3 and the furnace body 1 is adjusted so that the flow velocity of the sealing air is 1 m / s or more, and actually 4 m / s. In the conventional outside air suction type seal, since the pressure difference between the inside and outside of the furnace is small, it is difficult to make the flow rate of the seal air 0.6 m / s or more. However, in the forced seal method of the present invention, the flow rate of the seal air is 1 m / s. It is possible to reliably prevent the inflow of liquefied polyethylene or the like.
[0014]
Conventionally, the air in the ash take-out box 7 is sucked and the inside of the ash take-out box 7 is ventilated by the outside air flowing in from the outside air suction line 8, but in the present invention, compressed air is externally supplied through the flexible pipe 14. Since the air is supplied, the air in the ash removal box 7 is not sucked. Therefore, as shown in FIG. 1, it is preferable to provide a ventilation line 16 independent of the sealing air supply system and actively ventilate the inside of the ash take-out box 7 to prevent the temperature rise.
[0015]
In the embodiment described above, the annular air chamber 11 is formed on the bottom surface side of the annular packing 10 and the compressed air is supplied from the lower side, but the annular air chamber 11 is disposed on the upper surface side of the annular packing 10 as shown in FIG. And the flexible pipe 14 may be connected to the outer peripheral side. Also in this case, a large number of air ejection holes 13 are opened in the inner wall surface 12 so that the sealing air can be blown uniformly. Thus, the structure of the annular packing 10 is not limited to that of the embodiment.
[0016]
【The invention's effect】
As described above, according to the first aspect of the present invention, the seal air supply for uniformly ejecting compressed air from the periphery of the furnace bottom damper toward the inside of the furnace is provided on the annular packing portion provided on the outer periphery of the furnace bottom damper. By providing the means, the sealing air can be constantly supplied stably, and the frequency of cleaning the bottom of the furnace can be greatly reduced by preventing the adhesion and accumulation of unburned matter and ash.
[0017]
According to the invention of claim 2, liquefaction is achieved by adjusting the clearance of the sealing air ejection portion formed between the furnace bottom damper and the furnace body so that the flow velocity of the sealing air is 1 m / s or more. Thus, the inflow of polyethylene or the like can be surely prevented, and lack of sealing air due to blockage of the sealing air ejection portion can be prevented.
[0018]
According to the invention of claim 3, the tip of the annular packing is sharpened so that the surface pressure of the seal portion is 1 MPa or more, so that ash is not caught in the seal portion and a more reliable seal is possible. .
[0019]
Furthermore, according to the invention of claim 4, by providing an independent ventilation line in the ash take-out box formed below the furnace bottom damper, the inside of the ash take-out box 7 is positively ventilated to prevent its temperature rise. can do.
[0020]
According to the present invention, it is possible to surely seal the bottom of the furnace, as well as reliably prevent unburned matter and ash from adhering to and accumulating on the bottom of the furnace, and cleaning the bottom of the furnace, which was conventionally required once a month. There is an advantage that the frequency can be significantly reduced to about once a year, and it is possible to reduce the radiation exposure and improve the equipment operation rate by shortening the cleaning time.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a radioactive waste incinerator equipped with a furnace bottom seal structure of the present invention.
FIG. 2 is an enlarged cross-sectional view of a main part of FIG.
FIG. 3 is a perspective view of an annular packing.
FIG. 4 is an enlarged cross-sectional view of a main part showing another embodiment.
FIG. 5 is a cross-sectional view showing a radioactive waste incinerator having a conventional furnace bottom seal structure.
6 is an enlarged cross-sectional view of a main part of FIG.
FIG. 7 is a perspective view of a conventional annular packing.
[Explanation of symbols]
1 Incinerator body 2 Opening for ash removal 3 Furnace bottom damper 4 Horizontal shaft 5 Conventional annular packing 6 Slit 7 Ash removal box 8 Outside air suction line 9 Outer periphery of furnace bottom damper Flange, 10 annular packing of the present invention, 11 annular air chamber, 12 inner wall surface, 13 air ejection hole, 14 flexible pipe, 15 seal air ejection part, 16 ventilation line, 17 seal part

Claims (4)

負圧で運転される焼却炉の炉底ダンパの外周に設けられた環状パッキン部分に、炉底ダンパの周囲から炉内に向けて均一に圧縮空気を噴出するシール空気供給手段を設けた炉底シール構造であって、炉底ダンパの外周のフランジ上に取りつけられた前記環状パッキンの内部には環状空気室を備え、この環状パッキンの内側面からこの環状空気室に連通する多数の空気噴出孔が均一に開口され、かつ、この環状空気室には、圧縮空気供給パイプが取り付けられるとともに、供給される圧縮空気は、この環状空気室を経て前記空気噴出孔から環状パッキンの内側に均一に噴出し、次いで、前記炉底ダンパの外周部分と炉体との間に形成されるシール空気噴出部からシール空気として炉内に流入するようにしたシール空気供給手段を設けたことを特徴とする焼却炉の炉底シール構造。The annular packing portion provided on the outer periphery of the furnace bottom damper incinerators operated at negative pressure, the furnace bottom provided with sealing air supply means for injecting a uniformly compressed air toward the periphery of the furnace bottom damper into the furnace A seal structure having an annular air chamber inside the annular packing mounted on the outer peripheral flange of the furnace bottom damper, and a plurality of air ejection holes communicating with the annular air chamber from the inner surface of the annular packing Are opened uniformly, and a compressed air supply pipe is attached to the annular air chamber, and the supplied compressed air is uniformly ejected from the air ejection hole to the inside of the annular packing through the annular air chamber. and, then, especially in that a sealing air supply means so as to flow from the seal air ejection portion in the furnace as a sealing air formed between the outer peripheral portion and the furnace body of the furnace bottom damper Furnace bottom seal structure incinerator to. 炉底ダンパと炉体との間に形成されるシール空気噴出し部の隙間を調整し、シール空気の流速を１ｍ/ｓ以上とした請求項１記載の焼却炉の炉底シール構造。  The furnace bottom seal structure for an incinerator according to claim 1, wherein a gap between seal air ejection portions formed between the furnace bottom damper and the furnace body is adjusted so that a flow velocity of the seal air is 1 m / s or more. 環状パッキンの先端を尖らせてシール部の面圧を１ＭＰａ以上とした請求項１記載の焼却炉の炉底シール構造。  The bottom seal structure of an incinerator according to claim 1, wherein the tip of the annular packing is sharpened so that the surface pressure of the seal portion is 1 MPa or more. 炉底ダンパの下方に形成される灰取り出しボックスに、独立した換気ラインを設けた請求項１記載の焼却炉の炉底シール構造。  The bottom seal structure of an incinerator according to claim 1, wherein an independent ventilation line is provided in an ash removal box formed below the bottom damper.
JP2002056707A 2002-03-04 2002-03-04 Incinerator bottom seal structure Expired - Fee Related JP3771505B2 (en)

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JP5311810B2 (en) * 2007-12-07 2013-10-09 日本碍子株式会社 Radioactive miscellaneous solid waste incinerator
JP5523417B2 (en) * 2011-09-14 2014-06-18 日本碍子株式会社 Ion exchange resin incineration processing apparatus and ion exchange resin incineration processing method

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