JP2004168954A - Method and apparatus for preventing gas leakage of coke oven duct - Google Patents

Method and apparatus for preventing gas leakage of coke oven duct Download PDF

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Publication number
JP2004168954A
JP2004168954A JP2002338778A JP2002338778A JP2004168954A JP 2004168954 A JP2004168954 A JP 2004168954A JP 2002338778 A JP2002338778 A JP 2002338778A JP 2002338778 A JP2002338778 A JP 2002338778A JP 2004168954 A JP2004168954 A JP 2004168954A
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Prior art keywords
gas
duct
gas leakage
coke oven
leakage prevention
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JP2002338778A
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JP4930961B2 (en
Inventor
Masatoshi Sakatani
政利 酒谷
Mitsuru Yamamoto
充 山本
Kazuyoshi Machida
和喜 町田
Bunichi Sato
文一 佐藤
Hideaki Murakami
英明 村上
Seiichi Nakamura
清一 中村
Masao Sakuma
正男 佐久間
Hisanori Kako
久典 加来
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Nippon Steel Corp
Nippon Steel Chemical and Materials Co Ltd
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Nippon Steel Corp
Nippon Steel Chemical Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a countermeasure to damages propagating over a wide range from a high-temperature portion to a low-temperature portion of a gas duct. <P>SOLUTION: The method for preventing the gas leakage of a coke oven duct is a method for preventing the gas leakage in a duct 5 which is positioned between a regenerative chamber 3 and a regenerative chamber 4 and through which a gas supplied to a combustion chamber 2 passes by inserting a gas leakage preventive material 10 into the gas duct 5 to inhibit the gas from flowing between the gas duct and each of the regenerative chambers caused by occurrence of a crack, a joint cut or the like. The apparatus for preventing the gas leakage of the coke oven duct is provided with the gas leakage preventive material inserted into the gas duct such that the cross-sectional area of the inserted material occupies 30-90% of the cross-sectional area of the gas duct. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、コークス炉の蓄熱室間に位置し、燃焼室に供給されるガスを通すダクトでのガス漏れ防止方法およびその装置に関するものである。
【０００２】
【従来の技術】
図３に、一般的なコークス炉炉幅方向断面図を示す。また、図４は、従来の炭化室と燃焼室の一対部分拡大図である。この図３および図４に示すように、コークス炉においては、通常、炭化室１と燃焼室２が交互に配置され、燃焼室２で生じた熱で炭化室１の石炭を乾留してコークスを製造している。また、これらの下方には、蓄熱室が設置されている。蓄熱室は隣接する２つが一組となっていて、図３の場合は、片側の蓄熱室（Ａ）３で燃焼室２へ供給するガスを予熱し、もう片側の蓄熱室（Ｂ）４で燃焼室にて燃焼した高温の排ガスを導入して廃熱回収をしており、隣り合う蓄熱室内では必ずガスは互いに逆方向に流れるようになっている。
【０００３】
ここで複式コークス炉においては、通常使用している燃料が停止している場合に備えて別途燃焼室へ燃料ガス等を供給するためのガスダクト５が蓄熱室間に設置されているが、このガスダクト５と蓄熱室は、通常は煉瓦６のみで仕切られているため、図５に示すように、煉瓦の老朽化などで亀裂や目地切れ７等が発生すると、燃焼室予熱中のガスの一部が、直接廃熱回収を行っている蓄熱室へ漏洩する。蓄熱室間のガス流れの短絡８を引起し、結果としてガス使用量の増加や蓄熱室内での異常燃焼により他の煉瓦の劣化を引起こす等の問題がある。
【０００４】
すなわち、図５は、ガスダスト内ガス漏れ状態を示す図で、図５（ａ）は縦方向断面図、図５（ｂ）は横方向断面図である。なお、符号９は石炭装入入口であり、矢印はガスの流れ方向を示す。このため、亀裂や目地切れ等の損傷部の補修は非常に重要で、従来から損傷部にモルタルを浸透させるモルタル補修という方法が行われており、また、実開昭５６−１１１１４６号公報（特許文献１）などにおいては、特にガスダクト下方の煉瓦温度が１００〜３００℃の比較的低温な部分の劣化を防止する目的で耐熱性の樹脂をガスダクト内に被覆させると言う方法が提案されている。
【０００５】
【引用文献】
（１）特許文献１（実開昭５６−１１１１４６号公報）
【０００６】
【発明が解決しようとする課題】
しかしながら、上述のような問題を解消するために、発明者らは鋭意開発を進めた結果、その調査により、煉瓦損傷は実際には煉瓦温度が３００℃以上の比較的高温なガスダクト上方にも及んでいこと、そしてこれらによる燃焼用ガスの損失が多大な製造費の増加を招いていることが明らかになって来た。一方、従来の耐熱性樹脂による補修の場合では材質から修復可能な個所が比較的低温部に限定されてしまうという欠点がある。また、モルタル補修の場合も、モルタルが液状であるため亀裂が大きい場合には、十分に亀裂を閉塞する前に流れてしまうため、損傷が軽微な場合以外には殆ど効果がないという問題があった。 本発明の目的は、前述した従来技術の欠点を解消し、ガスダクト高温部から低温部までの幅広い損傷への対策を提供するものである。
【０００７】
【課題を解決するための手段】
その発明の要旨とするところは、
（１）コークス炉の蓄熱室間に位置し、燃焼室に供給されるガスを通すダクトにおいて、該ガスダクト内にガス漏れ防止材を挿入して亀裂や目地切れ等によって生ずるガスダクトと蓄熱室間のガス流れを防止することを特徴とするコークス炉ダクトのガス漏れ防止方法。
（２）前記（１）に記載のガス漏れ防止材の挿入断面積がガスダクト断面積の３０〜９０％になるように挿入したことを特徴とするコークス炉ダクトのガス漏れ防止方法。
【０００８】
（３）コークス炉の蓄熱室間に位置し、燃焼室に供給されるガスを通すダクトのガス漏れ防止装置において、該ガスダクト内にガス漏れ防止材を挿入してなることを特徴とするコークス炉ダクトのガス漏れ防止装置。
（４）前記（３）に記載のガス漏れ防止材が、ガスダクトより着脱可能に挿入したコークス炉ダクトのガス漏れ防止装置。
（５）前記（３）に記載のガス漏れ防止材が、ガスダクトの位置により材質を変えることを特徴とするコークス炉ダクトのガス漏れ防止装置。
【０００９】
（６）前記（３）に記載のガス漏れ防止材が、継ぎ手等で複数種の材質または長さを組み合わせることを特徴とするコークス炉ダクトのガス漏れ防止装置。
（７）前記（３）に記載のガス漏れ防止材の内部にガス通路を設けたことを特徴とするコークス炉ダクトのガス漏れ防止装置。
（８）前記（４）〜（７）に記載のガス漏れ防止材の本体または継ぎ手を可撓性としたことを特徴とするコークス炉ダクトのガス漏れ防止装置である。
【００１０】
【発明の実施の形態】
以下、本発明について図面に従って詳細に説明する。
図１は、本発明に係るコークス炉ダクトのガス漏れ防止装置を設置した状態を示す図であり、図２は、本発明に係るガスダスト内にガス漏れ防止装置を設置した状態の拡大図で、図２（ａ）は縦方向断面図、図２（ｂ）は横方向断面図である。この図１および図２に示すように、本発明はガスダクト５内にガス漏れ防止材１０を挿入して亀裂や目地切れ等によって生ずる蓄熱室間のガス流れを防止するものである。このガス漏れ防止材１０を挿入しない場合は、ガスダクト５内のガス流路１１に蓄熱室間のガス流れ８を阻害するものは全くなく、大量のガスが廃熱回収中の蓄熱室へ漏れてしまうが、ガス漏れ防止材１０を装入すると、ガスダクト５内のガス流路１１が狭くなり、通気抵抗が増すため、蓄熱室間へのガス流れが阻害され、短絡するガス量を減らすことが出来る。
【００１１】
このガス漏れ防止材は、耐高温、耐食性を備えたセラミックスやＳＵＳが望ましく、また、ガスダクト５内の温度等の環境が位置により変化するので位置により適した材質にする方が好ましい。これは連続的に材質を変化させても良いし、継ぎ手１２等で複数種の材質や部分的に取り替える場合や長さに制約がある場合、さらには、長さの異なるガス漏れ防止材を組合せることが出来る構造とすることが望ましい。例えば、図２に示すように燃焼室近くの高温部にあるガス漏れ防止材１０を高耐熱性材料を用いる方が好ましいが、燃焼室から離れた位置の低温部１３のガス漏れ防止材は雰囲気温度が低いため耐熱性を下げることができる。また、狭く曲がったガスダクト５内にできるだけ広い範囲で挿入するために、このガス漏れ防止材は例えば金属などの可撓性を持つ材質とすることが好ましい。
【００１２】
また、このガス漏れ防止材の効果は、ガスダクト内の流路を狭め、ガスの流れを防止することによって生じているため、あまりに小さなガス漏れ防止材は効果が少ない。内部が中空であっても問題はないが、本発明者らが試験を行った結果では、ガス漏れ防止材を挿入することによりガスダクト５内ガス通路１１が本来のガスダクト５内の流路断面積の９０％以下となることが好ましい。しかし、３０％未満になるとその効果が十分でない。従って、その最適範囲を３０〜９０％とする。さらに、このガス漏れ防止材を挿入するガスダクトにはガスを通す場合があるので、任意のタイミングでガスダクトより着脱可能とするため継ぎ手１２等で取り付けておくことが好ましい。
【００１３】
あるいは、ガスを通すために図２のように、このガス漏れ防止材である中空体のガス通路１４を有する構造となっても良い。この場合燃焼室に供給するガスの一部をこのガス漏れ防止材内を通すことで、漏れなく燃焼室に供給できるため燃焼室温度の上昇を図ることも可能である。また、ガス漏れ防止材は、これまで述べたような特徴の複数以上を同時に持ち合わせている方が現実の操業を考慮した場合には好ましい。なお、符号１５は挿入物固定用フランジであり、１６はガス漏れ防止材中空体にガスを吹き込むガス配管を示す。
【００１４】
【実施例】
以下、本発明について実施例によって具体的に説明する。
大きさを変えた中実または中空のガス漏れ防止材を数種類製作し、ガスダクトに設置した。ここでガス漏れ防止材の上部の燃焼室付近の部分は耐熱性金属で作製し、燃焼室から離れた部分のガス漏れ防止材は耐熱性の低い金属で作製した。ガス漏れ防止材を設置後１ケ月間、操業に使用するガス量一定のまま操業し、燃焼室温度を測定した結果を表１に示す。この表に示すように、設置前に比較して最高で１７℃上昇した。これは蓄熱室間を短絡するガス流れを防止できるためである。また、中空のガス漏れ防止材も殆ど効果は変わらなかった。
【００１５】
【表１】

Figure 2004168954
【００１６】
【発明の効果】
以上述べたように、本発明によるガス漏れ防止材を使用することで、同じガス量で燃焼室の温度を上げることが出来た。これによって燃料ガスの節約を図ることができ、極めて優れた効果を奏するものである。
【図面の簡単な説明】
【図１】本発明に係るコークス炉ダクトのガス漏れ防止装置を設置した状態を示す図、
【図２】本発明に係るガスダスト内にガス漏れ防止装置を設置した状態の拡大図、
【図３】一般的なコークス炉炉幅方向断面図、
【図４】従来の炭化室と燃焼室の一対部分拡大図、
【図５】ガスダスト内ガス漏れ状態を示す図である。
【符号の説明】
１ 炭化室
２ 燃焼室
３ 蓄熱室（Ａ）
４ 蓄熱室（Ｂ）
５ ガスダクト
６ 煉瓦
７ 亀裂や目地切れ
８ ガス流れの短絡
９ 石炭装入入口
１０ ガス漏れ防止材
１１ ガスダクト内ガス通路
１２ 継ぎ手
１３ 低温部
１４ 中空体のガス通路
１５ 挿入物固定用フランジ
１６ ガス配管[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method and an apparatus for preventing gas leakage in a duct located between heat storage chambers of a coke oven and through which gas supplied to a combustion chamber is passed.
[0002]
[Prior art]
FIG. 3 shows a general cross-sectional view in the coke oven width direction. FIG. 4 is a partially enlarged view of a conventional carbonization chamber and a combustion chamber. As shown in FIGS. 3 and 4, in the coke oven, usually, the coking chamber 1 and the combustion chamber 2 are alternately arranged, and the coke in the coking chamber 1 is carbonized by heat generated in the combustion chamber 2 to convert coke. Manufacturing. In addition, a heat storage chamber is provided below these. In the case of FIG. 3, the gas supplied to the combustion chamber 2 is preheated in the heat storage chamber (A) 3 on one side, and the heat storage chamber (B) 4 on the other side in the case of FIG. Waste heat recovery is performed by introducing high-temperature exhaust gas burned in the combustion chamber, and the gases always flow in opposite directions in adjacent heat storage chambers.
[0003]
Here, in the double coke oven, a gas duct 5 for separately supplying fuel gas or the like to the combustion chamber is provided between the heat storage chambers in preparation for a case where the fuel normally used is stopped. 5 and the heat storage chamber are normally separated only by the bricks 6, so that as shown in FIG. 5, when cracks or joint breaks 7 occur due to aging of the bricks, a part of the gas during the preheating of the combustion chamber is generated. However, it leaks directly to the heat storage chamber that is recovering waste heat. There is a problem that the short circuit 8 of the gas flow between the heat storage chambers is caused, and as a result, the amount of gas used is increased and other bricks are deteriorated due to abnormal combustion in the heat storage chamber.
[0004]
That is, FIG. 5 is a diagram showing a state of gas leakage in gas dust, FIG. 5 (a) is a longitudinal sectional view, and FIG. 5 (b) is a transverse sectional view. Reference numeral 9 denotes a coal charging inlet, and an arrow indicates a gas flow direction. For this reason, repair of damaged parts such as cracks and joint breaks is very important, and a method called mortar repair in which mortar is penetrated into damaged parts has been conventionally performed. Literature 1) and the like have proposed a method of coating a heat-resistant resin in a gas duct for the purpose of preventing deterioration of a relatively low temperature portion where a brick temperature below the gas duct is 100 to 300 ° C.
[0005]
[References]
(1) Patent Document 1 (Japanese Utility Model Laid-Open No. 56-111146)
[0006]
[Problems to be solved by the invention]
However, as a result of the inventor's intensive development to solve the above-mentioned problems, the investigation showed that brick damage actually extended to a relatively high temperature gas duct having a brick temperature of 300 ° C. or higher. It has become evident that the losses of combustion gases resulting from these have led to a significant increase in production costs. On the other hand, in the case of repair using a conventional heat-resistant resin, there is a disadvantage that the repairable portion is limited to a relatively low-temperature portion from the material. Also, in the case of mortar repair, if the mortar is in a liquid state and the crack is large, it will flow before the crack is sufficiently closed, so that there is almost no effect except when the damage is minor. Was. An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide a measure against a wide range of damage from a high temperature part to a low temperature part of a gas duct.
[0007]
[Means for Solving the Problems]
The gist of the invention is that
(1) In a duct located between the heat storage chambers of the coke oven and through which the gas supplied to the combustion chamber is passed, a gas leakage preventing material is inserted into the gas duct to allow the gas to flow between the gas duct and the heat storage chamber caused by cracks or breaks in joints. A method for preventing gas leakage from a coke oven duct, comprising preventing gas flow.
(2) A method for preventing gas leakage from a coke oven duct, wherein the gas leakage preventing material according to (1) is inserted so that the insertion cross-sectional area is 30 to 90% of the gas duct cross-sectional area.
[0008]
(3) A gas leak prevention device for a duct located between heat storage chambers of a coke oven and through which gas supplied to a combustion chamber is passed, wherein a gas leak prevention material is inserted into the gas duct. Gas leak prevention device for duct.
(4) A gas leakage prevention device for a coke oven duct in which the gas leakage prevention material according to (3) is detachably inserted from a gas duct.
(5) A gas leakage prevention device for a coke oven duct, wherein the material for the gas leakage prevention material according to (3) is changed depending on the position of the gas duct.
[0009]
(6) A gas leak preventing device for a coke oven duct, wherein the gas leak preventing material according to (3) is a combination of a plurality of materials or lengths with a joint or the like.
(7) A gas leakage prevention device for a coke oven duct, wherein a gas passage is provided inside the gas leakage prevention material according to (3).
(8) A gas leakage prevention device for a coke oven duct, characterized in that a body or a joint of the gas leakage prevention material according to (4) to (7) is made flexible.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention will be described below in detail with reference to the drawings.
FIG. 1 is a diagram showing a state in which a gas leakage prevention device for a coke oven duct according to the present invention is installed, and FIG. 2 is an enlarged view of a state in which a gas leakage prevention device is installed in gas dust according to the present invention. 2A is a vertical cross-sectional view, and FIG. 2B is a horizontal cross-sectional view. As shown in FIGS. 1 and 2, in the present invention, a gas leakage prevention member 10 is inserted into a gas duct 5 to prevent a gas flow between heat storage chambers caused by cracks, joint breaks and the like. When the gas leakage preventing member 10 is not inserted, there is no obstacle to the gas flow 8 between the heat storage chambers in the gas passage 11 in the gas duct 5, and a large amount of gas leaks into the heat storage chamber during waste heat recovery. However, when the gas leakage preventing material 10 is inserted, the gas flow path 11 in the gas duct 5 becomes narrower and the ventilation resistance increases, so that the gas flow between the heat storage chambers is obstructed and the amount of short-circuited gas is reduced. I can do it.
[0011]
The gas leakage preventing material is preferably ceramics or SUS having high temperature resistance and corrosion resistance, and it is preferable to use a material more suitable for the position because the environment such as the temperature in the gas duct 5 changes depending on the position. This may be achieved by continuously changing the material, or by replacing a plurality of materials with the joint 12 or the like, partially replacing the material, restricting the length, and combining gas leakage preventing materials having different lengths. It is desirable to have a structure that can be used. For example, as shown in FIG. 2, it is preferable to use a high heat-resistant material for the gas leakage prevention material 10 in the high temperature part near the combustion chamber, but the gas leakage prevention material in the low temperature part 13 at a position away from the combustion chamber is an atmosphere. Since the temperature is low, heat resistance can be reduced. Further, in order to insert the gas leakage preventing member in a narrowly bent gas duct 5 as much as possible, it is preferable that the gas leakage preventing member is made of a flexible material such as a metal.
[0012]
Further, since the effect of the gas leakage preventing material is caused by narrowing the flow path in the gas duct and preventing the flow of gas, an excessively small gas leakage preventing material has little effect. Although there is no problem even if the inside is hollow, the present inventors have conducted a test. According to the results of the test, the gas passage 11 in the gas duct 5 is formed by inserting the gas leakage preventing member so that the cross-sectional area of the flow passage in the original gas duct 5 is reduced. Is preferably 90% or less. However, if it is less than 30%, the effect is not sufficient. Therefore, the optimum range is 30 to 90%. Further, since the gas may pass through the gas duct into which the gas leakage preventing material is inserted, it is preferable to attach the gas leak preventing material to the joint 12 or the like so that the gas can be detached from the gas duct at an arbitrary timing.
[0013]
Alternatively, as shown in FIG. 2, a structure having a gas passage 14 of a hollow body which is a gas leakage prevention material for passing gas may be used. In this case, by passing a part of the gas to be supplied to the combustion chamber through the gas leakage prevention member, the gas can be supplied to the combustion chamber without leakage, so that the temperature of the combustion chamber can be increased. Further, it is preferable that the gas leakage prevention material has a plurality of the above-mentioned features at the same time in consideration of actual operation. Reference numeral 15 denotes an insert fixing flange, and reference numeral 16 denotes a gas pipe that blows gas into the gas leakage prevention member hollow body.
[0014]
【Example】
Hereinafter, the present invention will be described specifically with reference to Examples.
Several types of solid or hollow gas leak prevention materials of different sizes were manufactured and installed in gas ducts. Here, the portion near the combustion chamber above the gas leakage prevention material was made of a heat-resistant metal, and the gas leakage prevention material away from the combustion chamber was made of a metal with low heat resistance. One month after the gas leak preventing material was installed, the operation was performed with the gas amount used for the operation constant, and the results of measuring the temperature of the combustion chamber are shown in Table 1. As shown in this table, the temperature rose by a maximum of 17 ° C. compared to before the installation. This is because a gas flow that short-circuits between the heat storage chambers can be prevented. In addition, the effect of the hollow gas leak preventing material was almost unchanged.
[0015]
[Table 1]
Figure 2004168954
[0016]
【The invention's effect】
As described above, the temperature of the combustion chamber can be increased with the same gas amount by using the gas leakage preventing material according to the present invention. As a result, fuel gas can be saved, and an extremely excellent effect is achieved.
[Brief description of the drawings]
FIG. 1 is a diagram showing a state in which a gas leak prevention device for a coke oven duct according to the present invention is installed.
FIG. 2 is an enlarged view of a state in which a gas leakage prevention device is installed in gas dust according to the present invention;
FIG. 3 is a cross-sectional view of a general coke oven in a width direction,
FIG. 4 is a partially enlarged view of a conventional carbonization chamber and a combustion chamber,
FIG. 5 is a diagram showing a gas leak state in gas dust.
[Explanation of symbols]
1 Coking room 2 Combustion room 3 Heat storage room (A)
4 Thermal storage room (B)
5 Gas duct 6 Brick 7 Cracks and joint breaks 8 Short circuit of gas flow 9 Coal charging inlet 10 Gas leak prevention material 11 Gas passage in gas duct 12 Joint 13 Low temperature section 14 Gas passage of hollow body 15 Insert fixing flange 16 Gas pipe

Claims (8)

コークス炉の蓄熱室間に位置し、燃焼室に供給されるガスを通すダクトにおいて、該ガスダクト内にガス漏れ防止材を挿入して亀裂や目地切れ等によって生ずるガスダクトと蓄熱室間のガス流れを防止することを特徴とするコークス炉ダクトのガス漏れ防止方法。In a duct through which gas supplied to the combustion chamber is located between the heat storage chambers of the coke oven, a gas leakage prevention material is inserted into the gas duct to reduce a gas flow between the gas duct and the heat storage chamber caused by cracks or joint breaks. A method for preventing gas leakage from a coke oven duct, wherein the gas leakage is prevented. 請求項１に記載のガス漏れ防止材の挿入断面積がガスダクト断面積の３０〜９０％になるように挿入したことを特徴とするコークス炉ダクトのガス漏れ防止方法。A method for preventing gas leakage in a coke oven duct, wherein the gas leakage prevention material according to claim 1 is inserted so that its insertion cross-sectional area is 30 to 90% of the gas duct cross-sectional area. コークス炉の蓄熱室間に位置し、燃焼室に供給されるガスを通すダクトのガス漏れ防止装置において、該ガスダクト内にガス漏れ防止材を挿入してなることを特徴とするコークス炉ダクトのガス漏れ防止装置。A gas leakage prevention device for a duct located between heat storage chambers of a coke oven and for passing gas supplied to a combustion chamber, wherein a gas leakage prevention material is inserted into the gas duct. Leak prevention device. 請求項３に記載のガス漏れ防止材が、ガスダクトより着脱可能に挿入したコークス炉ダクトのガス漏れ防止装置。A gas leakage prevention device for a coke oven duct, wherein the gas leakage prevention material according to claim 3 is removably inserted from a gas duct. 請求項３に記載のガス漏れ防止材が、ガスダクトの位置により材質を変えることを特徴とするコークス炉ダクトのガス漏れ防止装置。4. A gas leakage prevention device for a coke oven duct, wherein the material of the gas leakage prevention material according to claim 3 changes depending on the position of the gas duct. 請求項３に記載のガス漏れ防止材が、継ぎ手等で複数種の材質または長さを組み合わせることを特徴とするコークス炉ダクトのガス漏れ防止装置。A gas leakage prevention device for a coke oven duct, wherein the gas leakage prevention material according to claim 3 is a combination of a plurality of types of materials or lengths with a joint or the like. 請求項３に記載のガス漏れ防止材の内部にガス通路を設けたことを特徴とするコークス炉ダクトのガス漏れ防止装置。A gas leakage prevention device for a coke oven duct, wherein a gas passage is provided inside the gas leakage prevention material according to claim 3. 請求項４〜７に記載のガス漏れ防止材の本体または継ぎ手を可撓性としたことを特徴とするコークス炉ダクトのガス漏れ防止装置。A gas leakage prevention device for a coke oven duct, characterized in that a body or a joint of the gas leakage prevention material according to any one of claims 4 to 7 is flexible.
JP2002338778A 2002-11-22 2002-11-22 Method and apparatus for preventing gas leakage in coke oven duct Expired - Fee Related JP4930961B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020158715A (en) * 2019-03-27 2020-10-01 伸吾 竹井 Burner for maintaining coke oven and method for maintaining coke oven

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020158715A (en) * 2019-03-27 2020-10-01 伸吾 竹井 Burner for maintaining coke oven and method for maintaining coke oven

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