JP2019038887A - Repair method for roof of coke oven - Google Patents

Repair method for roof of coke oven Download PDF

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JP2019038887A
JP2019038887A JP2017159929A JP2017159929A JP2019038887A JP 2019038887 A JP2019038887 A JP 2019038887A JP 2017159929 A JP2017159929 A JP 2017159929A JP 2017159929 A JP2017159929 A JP 2017159929A JP 2019038887 A JP2019038887 A JP 2019038887A
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ceiling
coke oven
refractory
roof
module block
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JP6502436B2 (en
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要 高野
Kaname Takano
要 高野
崇基 李
Chung-Ji Lee
崇基 李
進一 中込
Shinichi Nakagome
進一 中込
幸裕 隈元
Yukihiro Kumamoto
幸裕 隈元
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Megatech Corp Japan
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Abstract

To provide the repair method that can repair efficiently and in a short time the roof of a carbonization chamber and a combustion chamber of a coke oven.SOLUTION: The repair method of the roof of the carbonization chamber and the combustion chamber of the coke oven comprises: installing a modular block 4 in a space after forming the space by dismantling and carrying out refractory bricks around a coal charge hole refractory 5 and an inspection hole refractory and by leaving the coal charge hole refractory 5 and the inspection hole refractory on roof bricks 7, furthermore, mounting a roof plate 8 further upward than an upper surface of the modular block 4, and casting a caster 9 into a clearance around the modular block 4 located below the roof plate 8 to fill the clearance.SELECTED DRAWING: Figure 2

Description

本発明は、コークス炉の炭化室と燃焼室の天井を補修する補修方法に関するものである。   The present invention relates to a repair method for repairing a carbonization chamber and a combustion chamber ceiling of a coke oven.

図3はコークス炉の要部を模式的に示す水平断面図である。一般にコークス炉は、図3に示すように、石炭を乾留する炭化室2、燃料ガスを燃焼させる燃焼室1、燃焼排ガスの余熱を利用して燃料ガスや燃焼用空気を予め加熱する蓄熱室(図示せず)で構成され、燃焼室1と炭化室2は隔壁3を挟んで交互に配置される。つまり、互いに隣接する炭化室2を隔離する耐火煉瓦の隔壁3の内部に燃焼室1が形成される。   FIG. 3 is a horizontal sectional view schematically showing the main part of the coke oven. As shown in FIG. 3, a coke oven generally has a carbonization chamber 2 for carbonizing coal, a combustion chamber 1 for burning fuel gas, and a heat storage chamber for preheating fuel gas and combustion air using the residual heat of combustion exhaust gas ( The combustion chamber 1 and the carbonization chamber 2 are alternately arranged with the partition wall 3 interposed therebetween. That is, the combustion chamber 1 is formed inside the partition wall 3 of the refractory brick that separates the carbonization chambers 2 adjacent to each other.

炭化室2の天井には、石炭を装入するための装炭孔が設けられ、燃焼室の天井には、炉内状況を点検するための点検孔が設けられる。   A carbonization hole for charging coal is provided on the ceiling of the carbonization chamber 2, and an inspection hole for checking the inside of the furnace is provided on the ceiling of the combustion chamber.

そしてコークス炉の操業中に、炭化室2へ石炭を装入し、さらに燃焼室1で発生する燃焼熱によって乾留した後、得られたコークスを炭化室2から排出する作業が繰り返し行なわれる。その結果、燃焼室1や炭化室2の天井が劣化し、燃焼室1の天井から燃焼排ガスや未燃焼の燃料ガスが、炭化室2の天井からCOガス等の有毒ガスが、周辺環境に漏出するという問題が生じる。   During the operation of the coke oven, coal is charged into the carbonization chamber 2 and further subjected to dry distillation by the combustion heat generated in the combustion chamber 1, and then the obtained coke is discharged from the carbonization chamber 2 repeatedly. As a result, the ceiling of the combustion chamber 1 and the carbonization chamber 2 deteriorates, and combustion exhaust gas and unburned fuel gas leak from the ceiling of the combustion chamber 1 and toxic gases such as CO gas leak from the ceiling of the carbonization chamber 2 to the surrounding environment. Problem arises.

そこで、燃焼室1や炭化室2の天井を適宜補修しなければならないが、コークス炉の燃焼室1と炭化室2を全て停止して補修を行なうのはコークスの生産に支障を来たす。したがって、コークス炉を操業しながら、補修の対象となる天井部分の下側に位置する燃焼室1と炭化室2のみ稼動を停止して、補修を行なう。その補修工事の手順は、
(A)補修すべき天井を解体して搬出し、
その後、
(B)新たに天井を構築する
という2段階の工程に大別される。
Therefore, the ceiling of the combustion chamber 1 and the carbonization chamber 2 must be repaired as appropriate. However, if all the combustion chamber 1 and the carbonization chamber 2 of the coke oven are stopped and repaired, the coke production will be hindered. Therefore, while operating the coke oven, only the combustion chamber 1 and the carbonization chamber 2 located below the ceiling part to be repaired are stopped and repaired. The repair procedure is as follows:
(A) Dismantle the ceiling to be repaired and carry it out.
after that,
(B) It is roughly divided into a two-stage process of building a new ceiling.

従来から上記(B)の工程では、作業員が耐火煉瓦を1個ずつ積み上げて天井を構築している(たとえば特許文献1参照)。しかし、耐火煉瓦の積み上げを手作業で行なうので、極めて長時間を要する。しかも作業環境が高温であるから、作業員の安全を確保するための装備が必要となり、施工コストの上昇を招く。   Conventionally, in the process (B), an operator builds a ceiling by stacking refractory bricks one by one (for example, see Patent Document 1). However, since refractory bricks are manually stacked, it takes a very long time. Moreover, since the working environment is high temperature, equipment for ensuring the safety of workers is required, which causes an increase in construction costs.

特開2012-7000号公報JP 2012-7000

本発明は、従来の技術の問題点を解消し、コークス炉の炭化室と燃焼室の天井を、効率良く、短時間で補修することができる補修方法を提供することを目的とする。   An object of the present invention is to solve the problems of the prior art and to provide a repair method capable of repairing the carbonization chamber of the coke oven and the ceiling of the combustion chamber efficiently and in a short time.

本発明者は、コークス炉の天井の補修方法について検討した。そして、耐火煉瓦を積み上げて所定の形状(すなわち天井の一部をなす形状)に成形した耐火煉瓦集合体(以下、モジュールブロックという)を、炉外の地組場で予め製作しておき、上記(B)の工程でそのモジュールブロックを用いる補修方法に着目した。   The inventor examined a method for repairing the ceiling of the coke oven. And the firebrick brick aggregate (henceforth a module block) which piled up the firebrick and shape | molded in the predetermined | prescribed shape (namely, the shape which makes a part of ceiling) was manufactured beforehand in the assembly ground outside a furnace, We paid attention to the repair method using the module block in the process (B).

コークス炉の炭化室の天井には、石炭を装入するための装炭孔が設けられ、燃焼室の天井には、炉内を点検するための点検孔が設けられている。装炭孔を形成する耐火物(以下、装炭孔耐火物という)や点検孔を形成する耐火物(以下、点検孔耐火物という)は複雑な形状をしているので、それら形状に隙間なく嵌め合わせるようなモジュールブロックを製作するのは困難である。   A carbonization hole for charging coal is provided on the ceiling of the carbonization chamber of the coke oven, and an inspection hole for checking the inside of the furnace is provided on the ceiling of the combustion chamber. Refractories that form charring holes (hereinafter referred to as charcoal holes refractories) and refractories that form inspection holes (hereinafter referred to as inspection holes refractories) have complex shapes, so there is no gap in their shapes. It is difficult to produce a module block that fits together.

そこで、モジュールブロックは比較的単純な形状(たとえば直方体、立方体等)として、モジュールブロックの製作に要する時間を短縮する。そして補修工事において、そのモジュールブロックを使用することによって生じる隙間に、キャスターを流し込んで天井を構築すれば、施工に要する時間を短縮できる。つまり、モジュールブロックの製作に要する時間、および、モジュールブロックを用いた施工に要する時間を短縮することが可能となり、工期の短縮を図ることができる。   Therefore, the module block is formed in a relatively simple shape (for example, a rectangular parallelepiped, a cube, etc.) to shorten the time required for manufacturing the module block. And in repair work, if the caster is poured into the gap generated by using the module block and the ceiling is constructed, the time required for construction can be shortened. That is, it is possible to shorten the time required for manufacturing the module block and the time required for the construction using the module block, thereby shortening the construction period.

本発明は、このような知見に基づいてなされたものである。
すなわち本発明は、コークス炉の炭化室と燃焼室の天井を補修する補修方法において、装炭孔耐火物と点検孔耐火物の周辺の耐火煉瓦を解体して搬出する一方で、装炭孔耐火物と点検孔耐火物を天井煉瓦上に残置することによって空間を形成した後、その空間にモジュールブロックを設置し、さらにモジュールブロックの上面よりも上方にルーフプレートを装着し、ルーフプレートの下方に位置するモジュールブロックの周囲の隙間にキャスターを流し込んで、隙間を充填する補修方法である。
The present invention has been made based on such knowledge.
That is, the present invention relates to a repair method for repairing the carbonization chamber and the combustion chamber ceiling of a coke oven, while dismantling and carrying out the refractory bricks around the refractory and the inspection hole refractories, The space is formed by leaving the object and the inspection hole refractory on the ceiling brick, and then the module block is installed in the space, and the roof plate is mounted above the upper surface of the module block, and below the roof plate. This is a repair method in which casters are poured into a gap around a module block that is positioned to fill the gap.

本発明の補修方法においては、キャスターがアルミナ系キャスターであることが好ましい。   In the repair method of the present invention, the caster is preferably an alumina caster.

本発明によれば、コークス炉の炭化室と燃焼室の天井を、効率良く、短時間で補修することができるので、産業上格段の効果を奏する。   According to the present invention, the carbonization chamber of the coke oven and the ceiling of the combustion chamber can be repaired efficiently and in a short time, so that an industrially significant effect is achieved.

コークス炉の天井の装炭孔耐火物、点検孔耐火物、モジュールブロックの配置の例を模式的に示す斜視図である。It is a perspective view which shows typically the example of arrangement | positioning of the coal-hole refractory, inspection hole refractory, and module block of the ceiling of a coke oven. キャスターを充填した例を示す垂直断面図(図1のA−A矢視)である。It is a vertical sectional view (AA arrow view of FIG. 1) showing an example in which casters are filled. コークス炉の要部を模式的に示す水平断面図である。It is a horizontal sectional view which shows typically the principal part of a coke oven.

図1は、コークス炉の天井を補修するために、装炭孔耐火物5と点検孔耐火物6の周辺の耐火煉瓦を解体して搬出することによって形成された空間に、モジュールブロック4を設置した例を示す斜視図である。図1では、天井の耐火煉瓦を解体しない部分(すなわち天井を補修しない部分)は図示を省略する。つまり図1は、2列の炭化室と1列の燃焼室の天井を補修する例である。   FIG. 1 shows that a module block 4 is installed in a space formed by dismantling and carrying out the refractory bricks around the coal refractory 5 and the inspection refractory 6 in order to repair the coke oven ceiling. FIG. In FIG. 1, a portion of the ceiling where the firebrick is not dismantled (that is, a portion where the ceiling is not repaired) is not shown. That is, FIG. 1 is an example of repairing the ceiling of two rows of carbonization chambers and one row of combustion chambers.

図1に示すように、天井の耐火煉瓦を解体した後、装炭孔耐火物5と点検孔耐火物6は天井煉瓦7上に残置される。そして装炭孔耐火物5、点検孔耐火物6、天井煉瓦7で形成される空間にモジュールブロック4を設置する。モジュールブロック4は、予め地組場で製作したものであり、比較的単純な形状(たとえば直方体、立方体等)を有する。   As shown in FIG. 1, after dismantling the refractory brick on the ceiling, the charred hole refractory 5 and the inspection hole refractory 6 are left on the ceiling brick 7. Then, the module block 4 is installed in a space formed by the charring hole refractory 5, the inspection hole refractory 6 and the ceiling brick 7. The module block 4 is manufactured in advance at a building site, and has a relatively simple shape (for example, a rectangular parallelepiped, a cube, etc.).

次いで、図2に示すように、モジュールブロック4の上面よりも上方にルーフプレート8を装着する。ルーフプレート8は、モジュールブロック4、装炭孔耐火物5、点検孔耐火物6を保護するとともに、構造物としてのコークス炉の強度を維持するためのものである。そして、モジュールブロック4の周囲の隙間にキャスター9を流し込んで、隙間を充填する。   Next, as shown in FIG. 2, the roof plate 8 is mounted above the upper surface of the module block 4. The roof plate 8 protects the module block 4, the charred hole refractory 5, and the inspection hole refractory 6 and maintains the strength of the coke oven as a structure. Then, casters 9 are poured into the gap around the module block 4 to fill the gap.

キャスター9は、アルミナ(Al2O3)を主成分とするもの(以下、アルミナ系キャスターという)が好ましい。本発明に好適なアルミナ系キャスターの成分は、Al2O3:62質量%、CaO:5質量%以下、SiO2:33質量%であり、残部は不可避的に混入する不純物である。アルミナ系キャスターは粒径3.35mm超え:9.5質量%、粒径3.35〜0.15mm:51.5質量%、粒径0.15mm未満:39.0質量%、フリーフロー値は200mm超が好ましい。これらの特性を満たすアルミナ系キャスターは、冷間圧縮強度(添加水量8質量%)が130MPa程度となり、コークス炉の天井に求められる強度を十分に確保できる。 The caster 9 is preferably made of alumina (Al 2 O 3 ) as a main component (hereinafter referred to as alumina-based caster). The components of the alumina-based caster suitable for the present invention are Al 2 O 3 : 62% by mass, CaO: 5% by mass or less, and SiO 2 : 33% by mass, and the balance is impurities that are inevitably mixed. Alumina-based casters preferably have a particle size of more than 3.35 mm: 9.5% by mass, a particle size of 3.35 to 0.15 mm: 51.5% by mass, a particle size of less than 0.15 mm: 39.0% by mass, and a free flow value of more than 200 mm. An alumina caster satisfying these characteristics has a cold compressive strength (added water amount of 8% by mass) of about 130 MPa, and can sufficiently secure the strength required for the ceiling of the coke oven.

コークス炉(炉高6m、炉長34フリュー)の炭化室(2列)と燃焼室(1列)の天井の耐火煉瓦を解体して搬出(上記(A)の工程)した後、装炭孔耐火物、点検孔耐火物および天井煉瓦で形成される空間にモジュールブロックを設置した。次いで、モジュールブロックの上面よりも上方にルーフプレートを装着し、モジュールブロックの周囲の隙間にアルミナ系キャスターを流し込んで、隙間を充填した(上記(B)の工程)。使用したアルミナ系キャスターの成分は、Al2O3:62質量%、CaO:5質量%以下、SiO2:33質量%である。アルミナ系キャスターは粒径3.35mm超え:9.5質量%、粒径3.35〜0.15mm:51.5質量%、粒径0.15mm未満:39.0質量%、フリーフロー値は200mm超である。これを発明例とする。 After dismantling the fire bricks in the coke oven (furnace height 6m, furnace length 34 flue) and the ceiling of the combustion chamber (1 row) and carrying it out (step (A) above), the coal hole Module blocks were installed in the space formed by refractories, inspection hole refractories and ceiling bricks. Next, the roof plate was mounted above the upper surface of the module block, and alumina casters were poured into the gap around the module block to fill the gap (step (B) above). The components of the alumina caster used were Al 2 O 3 : 62% by mass, CaO: 5% by mass or less, and SiO 2 : 33% by mass. The alumina caster has a particle size of more than 3.35 mm: 9.5% by mass, a particle size of 3.35 to 0.15 mm: 51.5% by mass, a particle size of less than 0.15 mm: 39.0% by mass, and a free flow value of more than 200 mm. This is an invention example.

一方、従来は、天井の耐火煉瓦を解体して搬出(上記(A)の工程)した後、作業員が耐火煉瓦を積み上げて、天井を再構築(上記(B)の工程)していた。これを従来例とする。   On the other hand, conventionally, after dismantling and carrying out the refractory bricks on the ceiling (step (A) above), the workers pile up the refractory bricks and rebuilding the ceiling (step (B) above). This is a conventional example.

発明例と従来例について、上記(B)の工程に要した日数を比較したところ、発明例の所要日数Mは、従来例の所要日数Nに対してM/Nは約1/3であった。   When the number of days required for the process (B) was compared between the invention example and the conventional example, the required number M of the invention example was about 1/3 of the required number N of the conventional example. .

1 燃焼室
2 炭化室
3 隔壁
4 モジュールブロック
5 装炭孔耐火物
6 点検孔耐火物
7 天井煉瓦
8 ルーフプレート
9 キャスター
DESCRIPTION OF SYMBOLS 1 Combustion chamber 2 Carbonization chamber 3 Bulkhead 4 Module block 5 Charcoal hole refractory 6 Inspection hole refractory 7 Ceiling brick 8 Roof plate 9 Caster

Claims (2)

コークス炉の炭化室と燃焼室の天井を補修する補修方法において、装炭孔耐火物と点検孔耐火物の周辺の耐火煉瓦を解体して搬出する一方で、前記装炭孔耐火物と前記点検孔耐火物を天井煉瓦上に残置することによって空間を形成した後、該空間にモジュールブロックを設置し、さらに該モジュールブロックの上面よりも上方にルーフプレートを装着し、該ルーフプレートの下方に位置する前記モジュールブロックの周囲の隙間にキャスターを流し込んで、前記隙間を充填することを特徴とするコークス炉の天井の補修方法。   In the repair method of repairing the carbonization chamber and combustion chamber ceiling of the coke oven, the refractory bricks around the coal hole refractory and the inspection hole refractory are dismantled and carried out, while the coal hole refractory and the inspection are inspected. After forming a space by leaving the hole refractory on the ceiling brick, a module block is installed in the space, and a roof plate is mounted above the upper surface of the module block, and positioned below the roof plate. A method for repairing a ceiling of a coke oven, wherein casters are poured into a gap around the module block to fill the gap. 前記キャスターがアルミナ系キャスターであることを特徴とする請求項1に記載のコークス炉の天井の補修方法。   2. The method for repairing a coke oven ceiling according to claim 1, wherein the caster is an alumina caster.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024013270A1 (en) * 2022-07-13 2024-01-18 Paul Wurth S.A. Coke oven roof repair or replacement

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001019968A (en) * 1999-07-05 2001-01-23 Kawasaki Steel Corp Repairing method for coke oven
JP2014091764A (en) * 2012-11-01 2014-05-19 Jfe Steel Corp Method for repairing coke oven by partial replacement
JP2016000775A (en) * 2014-06-11 2016-01-07 株式会社メガテック Method of repairing wall body and ceiling of coke oven combustion chamber and ceiling of coke oven chamber adjacent to the combustion chamber

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001019968A (en) * 1999-07-05 2001-01-23 Kawasaki Steel Corp Repairing method for coke oven
JP2014091764A (en) * 2012-11-01 2014-05-19 Jfe Steel Corp Method for repairing coke oven by partial replacement
JP2016000775A (en) * 2014-06-11 2016-01-07 株式会社メガテック Method of repairing wall body and ceiling of coke oven combustion chamber and ceiling of coke oven chamber adjacent to the combustion chamber

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024013270A1 (en) * 2022-07-13 2024-01-18 Paul Wurth S.A. Coke oven roof repair or replacement
LU502499B1 (en) * 2022-07-13 2024-01-18 Wurth Paul Sa Coke oven roof repair, replacement or construction

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