JP2020070341A - Dismantling and constructing method of coke oven - Google Patents

Dismantling and constructing method of coke oven Download PDF

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JP2020070341A
JP2020070341A JP2018204972A JP2018204972A JP2020070341A JP 2020070341 A JP2020070341 A JP 2020070341A JP 2018204972 A JP2018204972 A JP 2018204972A JP 2018204972 A JP2018204972 A JP 2018204972A JP 2020070341 A JP2020070341 A JP 2020070341A
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construction
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coke oven
ceiling
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康平 長尾
Kohei Nagao
康平 長尾
要 高野
Kaname Takano
要 高野
敏敬 三宅
Toshitaka Miyake
敏敬 三宅
光剛 長尾
Mitsutake Nagao
光剛 長尾
雅寛 諏訪
Masahiro Suwa
雅寛 諏訪
泰之 大里
Yasuyuki Osato
泰之 大里
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Megatech Corp Japan
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Abstract

To provide the dismantling and constructing method of the coke oven that can shorten a construction period from dismantle of an old coke oven to construct of a new coke oven, and can reduce a construction cost of the new coke oven by utilizing a basic structure of the old coke oven.SOLUTION: The dismantling and constructing method of the coke oven comprises: dismantling an existing old coke oven to remove; leaving a basic structure of an old coke oven at an existing location; and constructing a new coke oven on the basic structure.SELECTED DRAWING: Figure 1

Description

本発明は、老朽化したコークス炉を解体した後、新たなコークス炉を建設するコークス炉の解体建設方法に関するものである。   The present invention relates to a coke oven dismantling construction method for constructing a new coke oven after dismantling an aging coke oven.

一般にコークス炉は、石炭を乾留する炭化室、燃料ガスを燃焼させる燃焼室、燃料ガスの燃焼によって発生した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、排ガスを放出するための下部水平煙道、および石炭を炭化室へ投入するための機器(たとえば装炭車等)ならびに冷却水等を供給するための配管(以下、天井配管という)を配設した天井部を備えており、外殻となる鉄製構造物(いわゆるバックステイ)で炉体が保持される。   Generally, a coke oven is a carbonization chamber for carbonization of coal, a combustion chamber for burning fuel gas, a heat storage chamber for preheating the fuel gas and combustion air by using the residual heat of exhaust gas generated by the combustion of fuel gas, and the emission of exhaust gas. A lower horizontal flue, and a ceiling for arranging equipment for charging coal into the carbonization chamber (for example, coal car) and piping for supplying cooling water (hereinafter referred to as ceiling piping). In addition, the furnace body is held by an iron structure (so-called back stay) serving as an outer shell.

コークス炉を構成する天井部、炭化室、燃焼室、蓄熱室、下部水平煙道は、いずれも耐火煉瓦を積み上げて形成されており、稼働に伴う耐火煉瓦の損耗に応じて補修(たとえば特許文献1)を適宜施すことによって、コークス炉の稼働を続けている。ところが長年にわたってコークス炉を稼働すると、耐火煉瓦の損耗が広範囲に拡大し、さらにバックステイの損傷や変形も発生する。このような老朽化した既存のコークス炉(以下、旧コークス炉という)を稼働し続けると、生産効率の低下、更に生産されるコークスの品質が低下して、後工程(たとえば高炉等)の稼働に悪影響を及ぼす。   The ceiling part, the carbonization chamber, the combustion chamber, the heat storage chamber, and the lower horizontal flue that constitute the coke oven are all formed by stacking refractory bricks, and are repaired according to the wear of the refractory bricks during operation (for example, Patent Document 1). The coke oven continues to operate by applying 1) appropriately. However, if the coke oven is operated for many years, the wear of the refractory bricks will spread over a wide range, and the backstay will be damaged or deformed. If such existing aging coke ovens (hereinafter referred to as old coke ovens) continue to operate, the production efficiency will decrease and the quality of the coke produced will also decrease, resulting in the operation of post-processes (such as blast furnaces). Adversely affect.

したがって旧コークス炉の老朽化が著しく進行した場合には、新たなコークス炉(以下、新コークス炉という)を新規に建設しなければならない。ただし新コークス炉の敷地を、製鉄工場内の旧コークス炉とは別の場所に確保するのは困難であるから、まず旧コークス炉の稼働を停止して解体した後、その敷地に新コークス炉を建設する必要がある。   Therefore, when the old coke oven has deteriorated significantly, a new coke oven (hereinafter referred to as a new coke oven) must be newly constructed. However, it is difficult to secure the site of the new coke oven in a place different from that of the old coke oven in the steel mill, so first stop the operation of the old coke oven and dismantle it, and then add the new coke oven to the site. Need to be built.

旧コークス炉の解体工事は、従来の技術で比較的容易に行なうことができる。しかし、一般に新コークス炉の建設工事では、基礎部分は流用し、その基礎構造物の上に耐火煉瓦を積み上げて炉体を構築する作業を行なうので、炉体を構築するための工事(以下、炉体工事という)に多大な時間を要する。   The dismantling work of the old coke oven can be carried out relatively easily by conventional techniques. However, in general, in the construction work of a new coke oven, the foundation part is diverted, and the work to build a furnace body by stacking refractory bricks on the foundation structure is performed, so the work for building the furnace body (hereinafter, It takes a lot of time to construct the furnace body).

つまり従来の技術では、旧コークス炉の停止から新コークス炉の稼働までの期間が長時間に及ぶので、製鉄工場の操業に支障をきたすばかりでなく、解体および建設の工事費用が大幅に増大する。   In other words, in the conventional technology, the period from the shutdown of the old coke oven to the operation of the new coke oven takes a long time, which not only hinders the operation of the iron mill, but also significantly increases the construction cost for dismantling and construction. ..

したがって、旧コークス炉の解体工事および新コークス炉の建設工事の工事期間を短縮する技術が求められる。   Therefore, technology is required to shorten the construction period for dismantling the old coke oven and constructing the new coke oven.

特開平10-219252号公報Japanese Patent Laid-Open No. 10-219252

本発明は、従来の技術の問題点を解消し、非膨張耐火材を使用することによる高精度炉体構築及び旧コークス炉の解体から新コークス炉の建設までの工期短縮が可能となり、かつ、工事に携わる作業員数(いわゆる工数)を削減するとともに、新コークス炉の建設から炉温を上昇して稼働に到るまでの立ち上げ期間を短縮することも可能なコークス炉の解体建設方法を提供することを目的とする。   The present invention eliminates the problems of the prior art, it is possible to shorten the construction period from the construction of a high-precision furnace body and the dismantling of the old coke furnace to the construction of the new coke furnace by using a non-expandable refractory material, and We provide a method for dismantling and constructing a coke oven that can reduce the number of workers involved in the work (so-called man-hours) and also shorten the start-up period from the construction of the new coke oven to the start of operation by raising the furnace temperature. The purpose is to do.

本発明者は、新コークス炉の建設工事の炉体高精度構築及び工期を短縮する技術を検討した。そして、まず、高精度かつ炉体工事に要する工期を短縮する技術の研究において、単一の耐火材料で一体的に成形したブロック(以下、一体成形ブロックという)に着目した。つまり、従来の炉体工事では耐火煉瓦を1個ずつ積み上げて炉体を形成していたのに対して、所定の形状(たとえば燃焼室、蓄熱室等)を有する一体成形ブロック(寸法:長さ900〜1800mm程度、幅900〜1000mm程度、高さ200〜1000mm程度)を予め製造しておき、その一体成形ブロックを用いて新コークス炉を建設することによって、炉体工事の工期を短縮できる。   The present inventor has studied a technique for constructing a highly accurate furnace body and shortening the construction period for the construction work of a new coke oven. Then, first, in a study of a technique for highly accurate and shortening the construction period required for furnace body construction, attention was paid to a block integrally molded with a single refractory material (hereinafter referred to as an integrally molded block). That is, in the conventional furnace body construction, the refractory bricks were piled up one by one to form the furnace body, whereas an integrally formed block (size: length) having a predetermined shape (for example, combustion chamber, heat storage chamber, etc.) 900-1800mm, width 900-1000mm, height 200-1000mm) is manufactured in advance and a new coke oven is constructed using the integrally molded block, so that the work period of the furnace body work can be shortened.

炉体構築において、蓄熱室の構造体及び燃焼室は非膨張性耐火材(たとえば珪石質耐火材等)からなる一体成形ブロックを使用すれば、一体成形ブロックの膨張量が減少するので、新コークス炉の建設が終了した後、高精度の炉体が保たれかつ炉体を短時間で昇温して稼働することができる。つまり、新コークス炉の立ち上げ期間を短縮する効果も得られる。   In the construction of the furnace body, if the integrally molded block made of non-expandable refractory material (for example, silica refractory material) is used for the structure of the heat storage chamber and the combustion chamber, the expansion amount of the integrally molded block will decrease. After the construction of the furnace is completed, a highly accurate furnace body can be maintained and the furnace body can be heated and operated in a short time. In other words, the effect of shortening the startup period of the new coke oven can be obtained.

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、老朽化した既存の旧コークス炉の旧装炭車、旧天井配管、旧バックステイ、旧天井部、旧燃焼室、旧蓄熱室、旧下部水平煙道を解体して搬出し、旧コークス炉の基礎構造物を既存の場所に残置して、基礎構造物の上に新規の新コークス炉を建設するコークス炉の解体建設方法において、
旧コークス炉に配設される旧装炭車、旧天井配管、旧バックステイを解体して自走式クレーンで搬出し、さらに、旧コークス炉の耐火煉瓦で構成される旧天井部、旧燃焼室を解体して不定形の解体煉瓦塊とし、自走式クレーンを用いて解体煉瓦塊を搬出し、引き続き、工事用仮設建屋を設置して基礎構造物の上方の空間を覆い、工事用仮設建屋の内部に工事用天井クレーン、工事用足場を設置した後、旧蓄熱室、旧下部水平煙道を解体して不定形の蓄熱室解体物、煙道解体物とし、自走式クレーンを用いて煙道解体物を搬出することによって、基礎構造物を既存の場所で露出させ且つ残置し、
次いで、自走式クレーンを用いて煙道用一体成形ブロックを基礎構造物上に設置して新規の新下部水平煙道を形成し、引き続き、自走式クレーンを用いて蓄熱室用一体成形ブロックを新下部水平煙道上に設置して新蓄熱室を構築した後、新バックステイを組み立て、さらに、自走式クレーンを用いて燃焼室用一体成形ブロック、天井用一体成形ブロックを順次工事用足場へ搬送する一方で、工事用天井クレーンを用いて工事用足場から燃焼室用一体成形ブロック、天井用一体成形ブロックを吊り上げて更に新バックステイで形成される空間に設置して新燃焼室、新天井部を構築し、次に、新天井部に新装炭車、新天井配管を設置した後、工事用足場、工事用天井クレーン、工事用仮設建屋を解体して自走式クレーンで搬出することによって新コークス炉を建設するコークス炉の解体建設方法である。
The present invention has been made based on such findings.
That is, the present invention dismantles and carries out an old coal car of an old old coke oven, an old ceiling pipe, an old back stay, an old ceiling part, an old combustion chamber, an old heat storage chamber, and an old lower horizontal flue, In the dismantling construction method of the coke oven, in which the foundation structure of the old coke oven is left in the existing place and a new new coke oven is constructed on the foundation structure,
The old coal car installed in the old coke oven, the old ceiling piping, and the old backstay were dismantled and taken out by a self-propelled crane. Furthermore, the old ceiling part made of refractory bricks of the old coke oven, the old combustion chamber Is dismantled into an unstructured dismantled brick lump, and the dismantled brick lump is carried out using a self-propelled crane, and then a temporary building for construction is installed to cover the space above the foundation structure, and a temporary building for construction is constructed. After installing the construction overhead crane and construction scaffolding inside the building, dismantle the old heat storage chamber and the old lower horizontal flue to disassemble the heat storage room and the flue, and use a self-propelled crane. Exposing and leaving the substructure at the existing location by carrying out the flue demolition
Next, a self-propelled crane is used to install the integrally molded block for the flue on the foundation structure to form a new new lower horizontal flue, and then a self-propelled crane is used to integrally mold the heat storage chamber. On the new lower horizontal flue to build a new heat storage chamber, then assemble a new backstay, and then use a self-propelled crane to sequentially construct an integrated molded block for the combustion chamber and an integrated molded block for the ceiling. While transporting to a new combustion chamber, the integrated molding block for the combustion chamber and the integrated molding block for the ceiling are lifted from the construction scaffolding using the construction overhead crane and installed in the space formed by the new back stay. After constructing the ceiling part, and then installing a new coal car and new ceiling piping on the new ceiling part, dismantling the scaffolding for construction, the ceiling crane for construction, the temporary building for construction, and carrying out with a self-propelled crane new It is dismantling construction method of the coke oven to build a Kusu furnace.

本発明の解体建設方法においては、燃焼室用一体成形ブロックとして非膨張性耐火材からなる一体成形ブロックを用いることが不可欠である。また、新蓄熱室の上層部に配置する蓄熱室用一体成形ブロックとして非膨張性耐火材からなる一体成形ブロックを用いることが不可欠である。   In the dismantling construction method of the present invention, it is essential to use an integrally molded block made of a non-expandable refractory material as the integrally molded block for the combustion chamber. In addition, it is essential to use an integrally formed block made of a non-expandable refractory material as an integrally formed block for the heat storage chamber arranged in the upper layer portion of the new heat storage chamber.

本発明によれば、旧コークス炉の解体から新コークス炉の建設において、高精度炉体構築及び工期短縮が可能となり、かつ、工数を削減するとともに、新コークス炉の建設から稼働に到る立ち上げ期間を短縮することも可能となり、産業上格段の効果を奏する。   According to the present invention, in the construction of a new coke oven from the dismantling of the old coke oven, it is possible to construct a high-precision furnace body and shorten the construction period, and at the same time reduce the number of man-hours, and from the construction of the new coke oven to the operation. It is also possible to shorten the raising period, which has a marked effect on the industry.

本発明による新コークス炉の建設工事の例を模式的に示す断面図である。It is sectional drawing which shows typically the example of the construction work of the new coke oven by this invention. 本発明で使用する蓄熱室用一体成形ブロック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 the integrally molded block for heat storage chambers used by this invention. 本発明で使用する燃焼室用一体成形ブロックの例を模式的に示す平面図である。It is a top view which shows typically the example of the integrally molded block for combustion chambers used by this invention. 本発明で使用する天井部用一体成形ブロック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 the integrally molded block for ceiling parts used by this invention.

本発明の解体建設方法を適用して旧コークス炉を解体し、さらに新コークス炉を建設する方法を説明するにあたって、まず、老朽化した既存の旧コークス炉(図示せず)の解体工事について説明する。   In explaining the method of dismantling the old coke oven by applying the dismantling construction method of the present invention and further constructing the new coke oven, first, the dismantling work of the existing old coke oven (not shown) that has deteriorated is explained. To do.

旧コークス炉を構成する天井部、燃焼室、蓄熱室、下部水平煙道(以下、それぞれ旧天井部、旧燃焼室、旧蓄熱室、旧下部水平煙道という)は、いずれも多数の耐火煉瓦を積み上げて構築されており、天井部には装炭車、天井配管(以下、それぞれ旧装炭車、旧天井配管という)が配設される。炉体はバックステイ(以下、旧バックステイという)で保持される。   The ceiling, combustion chamber, heat storage chamber, and lower horizontal flue that make up the old coke oven (hereinafter referred to as the old ceiling, old combustion chamber, old heat storage chamber, and old lower horizontal flue, respectively) are all made of many refractory bricks. Are built by stacking a coal car and a ceiling pipe (hereinafter referred to as an old coal car and an old ceiling pipe, respectively) on the ceiling. The furnace body is held by a back stay (hereinafter referred to as an old back stay).

そして、旧コークス炉の解体工事において、まず、旧装炭車、旧天井配管、旧バックステイを解体して自走式クレーンで搬出する。旧装炭車、旧天井配管、旧バックステイを解体する手段は特に限定せず、従来から知られている手段(たとえば油圧クラッシャー、溶断等)を使用する。   Then, in the dismantling work of the old coke oven, first, the old coal car, the old ceiling piping, and the old backstay are dismantled and carried out by a self-propelled crane. The means for dismantling the old coal car, the old ceiling piping, and the old backstay is not particularly limited, and a conventionally known means (for example, hydraulic crusher, fusing, etc.) is used.

次いで、旧天井部、旧燃焼室を解体する。そのための手段は特に限定せず、従来から知られている手段(たとえば油圧ショベル、エアブレーカ等)を使用する。これらの手段で旧天井部、旧燃焼室を解体すると、煉瓦集合体の不定形な塊(以下、解体煉瓦塊という)が発生する。そこで、自走式クレーンを用いて解体煉瓦塊を吊り上げて、解体煉瓦塊を所定の貯蔵場所(あるいは貯蔵場所へ運搬するためのトラックの停車場所)へ搬出する。   Next, the old ceiling and the old combustion chamber are dismantled. The means therefor is not particularly limited, and conventionally known means (eg hydraulic excavator, air breaker, etc.) is used. When the old ceiling part and the old combustion chamber are dismantled by these means, an amorphous block of the brick aggregate (hereinafter referred to as a demolished brick block) is generated. Therefore, the demolished brick block is lifted by using a self-propelled crane, and the demolished brick block is carried out to a predetermined storage location (or a stop location of a truck for transporting to the storage location).

こうして、基礎構造物と旧下部水平煙道、旧蓄熱室を残して解体工事を中断し、工事用仮設建屋を設置して、基礎構造物、旧下部水平煙道、旧蓄熱室およびその上方の空間を覆う。工事用仮設建屋を設置することによって、以後の作業によって発生する粉塵が飛散するのを防止する。また、雨天や強風等の天候の影響を受けることなく工事を進めることが可能となるので、作業を効率よく行なうことができる。   In this way, dismantling work was suspended, leaving the foundation structure, the former lower horizontal flue, and the former heat storage chamber, and the temporary building for construction was installed, and the foundation structure, the former lower horizontal flue, the former heat storage room and the upper part Cover the space. By installing a temporary building for construction, it is possible to prevent dust generated by subsequent work from scattering. Further, since it becomes possible to proceed with the construction without being affected by the weather such as rainy weather or strong wind, the work can be carried out efficiently.

さらに、工事用仮設建屋の内部に工事用天井クレーン、工事用足場を設置する。こうして作業効率の更なる向上を図る。なお、工事用仮設建屋には、自走式クレーンやトラックの出入り口を設けておく。   In addition, a construction overhead crane and construction scaffolding will be installed inside the temporary construction building. In this way, work efficiency is further improved. The temporary building for construction will have a doorway for self-propelled cranes and trucks.

引き続き、旧蓄熱室、旧下部水平煙道を解体して、発生した不定形の蓄熱室解体物、煙道解体物を自走式クレーンで吊り上げて搬出する。その結果、基礎構造物が作業床に露出する。その基礎構造物を既存の場所に残置して、旧コークス炉の解体工事が終了する。   Then, the old heat storage room and the old lower horizontal flue are dismantled, and the generated amorphous heat storage room dismantlement and flue dismantlement are lifted by a self-propelled crane and carried out. As a result, the substructure is exposed on the work floor. The dismantling work of the old coke oven is completed, leaving the foundation structure in the existing place.

次に、新コークス炉の建設工事について、図1を参照して説明する。以下では、新コークス炉1を構成する装炭車、天井配管、バックステイ、天井部、燃焼室、蓄熱室、下部水平煙道を、それぞれ新装炭車、新天井配管、新バックステイ、新天井部、新燃焼室、新蓄熱室、新下部水平煙道と記す。なお、図1では工事用仮設建屋は図示を省略する。   Next, the construction work of the new coke oven will be described with reference to FIG. In the following, a coal car, a ceiling pipe, a back stay, a ceiling part, a combustion chamber, a heat storage chamber, and a lower horizontal flue which compose the new coke oven 1 are referred to as a new coal car, a new ceiling pipe, a new back stay, a new ceiling part, respectively. New combustion chamber, new heat storage chamber, new lower horizontal flue. In addition, illustration of the temporary building for construction is omitted in FIG.

まず、工事用天井クレーン8ならびに自走式クレーン9を用いて、煙道を形成するために予め成形した一体成形ブロック(以下、煙道用一体成形ブロックという)を旧基礎構造物の上に設置して、新下部水平煙道5を形成する。煙道用一体成形ブロックは、旧下部水平煙道を形成していた耐火煉瓦と同一成分の粘土質耐火材とバインダー(たとえばリン酸塩、酸化カルシウム等)を混合して所定の型枠に流し込んで成形したものである。   First, using the construction overhead crane 8 and the self-propelled crane 9, an integrally formed block preformed to form a flue (hereinafter referred to as flue integrally formed block) is installed on the old foundation structure. Then, the new lower horizontal flue 5 is formed. The integrally molded block for a flue is made by mixing a clay refractory material having the same composition as the refractory brick that had formed the old lower horizontal flue and a binder (eg phosphate, calcium oxide, etc.) and pouring it into a prescribed formwork. It was molded in.

その後、新蓄熱室4を形成するために予め成形した一体成形ブロック(以下、蓄熱室用一体成形ブロックという)を工事用天井クレーン8、自走式クレーン9で新下部水平煙道5上に設置することによって、新蓄熱室4を形成する。蓄熱室用一体成形ブロックの下部は、旧蓄熱室を形成していた耐火煉瓦と同一成分の耐火材、上部は非膨張耐火材をそれぞれ所定の型枠に流し込んで成形したものである。その一例を図2に示す。なお使用する耐火材は、蓄熱室の下層部に配置する蓄熱室用一体成形ブロックでは粘土質耐火材、上層部に配置する蓄熱室用一体成形ブロックでは珪石質耐火材(すなわち非膨張性耐火材)である。   After that, an integrally molded block preformed to form the new heat storage chamber 4 (hereinafter referred to as a heat storage chamber integrated mold block) is installed on the new lower horizontal flue 5 by the construction overhead crane 8 and the self-propelled crane 9. By doing so, the new heat storage chamber 4 is formed. The lower part of the integrally molded block for the heat storage chamber is formed by pouring a refractory material having the same composition as that of the refractory brick forming the old heat storage chamber and the non-expandable refractory material into a predetermined mold. An example thereof is shown in FIG. The refractory materials used are clay-based refractory materials for the heat storage chamber integrally formed block located in the lower layer of the heat storage chamber, and siliceous refractory materials (that is, non-expandable refractory materials) for the heat storage chamber integrally formed block located in the upper layer. ).

次いで、新バックステイ6、工事用足場7を組み立てる。これらの組み立てに必要な資材の運搬は、工事用天井クレーン8、自走式クレーン9を用いて行なう。   Next, the new back stay 6 and the construction scaffold 7 are assembled. The materials required for these assembling are transported using the construction overhead crane 8 and the self-propelled crane 9.

引き続き、 新燃焼室3を形成するために予め成形した一体成形ブロック(以下、燃焼室用一体成形ブロックという)を自走式クレーン9で工事用足場7へ搬送し、さらに工事用天井クレーン8を用いて燃焼室用一体成形ブロックを工事用足場7から吊り上げて、新蓄熱室4上(すなわち新バックステイ6で形成される空間)に設置することによって、新燃焼室3を形成する。燃焼室用一体成形ブロックは、旧燃焼室を形成していた耐火煉瓦と同一成分の珪石質耐火材とバインダー(たとえばリン酸塩、酸化カルシウム等)を混合して所定の型枠に流し込んで成形したものである。その一例を図3に示す。   Subsequently, an integrally molded block preformed to form the new combustion chamber 3 (hereinafter referred to as a combustion chamber integrally molded block) is conveyed to the construction scaffold 7 by the self-propelled crane 9, and the construction overhead crane 8 is further installed. By using the integrally molded block for the combustion chamber by lifting it from the construction scaffold 7 and installing it on the new heat storage chamber 4 (that is, the space formed by the new backstay 6), the new combustion chamber 3 is formed. The integrated molding block for the combustion chamber is molded by mixing silica refractory with the same composition as the refractory bricks that formed the old combustion chamber and a binder (for example, phosphate, calcium oxide, etc.) and pouring it into a prescribed mold. It was done. One example is shown in FIG.

次いで、新天井部2を形成するために予め成形した一体成形ブロック(以下、天井部用一体成形ブロックという)を自走式クレーン9で工事用足場7へ搬送し、さらに工事用天井クレーン8を用いて天井部用一体成形ブロックを工事用足場7から吊り上げて、新燃焼室3上(すなわち新バックステイ6で形成される空間)に設置することによって、新天井部2を形成する。天井部用一体成形ブロックは、旧天井部を形成していた耐火煉瓦と同一成分の粘度質耐火材とバインダー(たとえばリン酸塩、酸化カルシウム等)を混合して所定の型枠に流し込んで成形したものである。天井部用一体成形ブロックの一例として、装炭口を形成するための一体成形ブロックの例を図4に示す。   Next, an integrally molded block preformed to form the new ceiling part 2 (hereinafter referred to as an integrally molded block for ceiling part) is transported to the construction scaffold 7 by the self-propelled crane 9, and the construction overhead crane 8 is further installed. The integrally molded block for the ceiling part is lifted from the scaffolding 7 for construction and installed on the new combustion chamber 3 (that is, the space formed by the new back stay 6) to form the new ceiling part 2. The integrally molded block for the ceiling part is molded by mixing a refractory refractory material with the same composition as the refractory brick that formed the old ceiling part, and a binder (eg phosphate, calcium oxide, etc.) and pouring it into a prescribed formwork. It was done. As an example of the integrally molded block for the ceiling part, an example of the integrally molded block for forming the coal charging port is shown in FIG.

さらに、新天井部2に新装炭車、新天井配管を設置する。
そして最後に、工事用足場7、工事用天井クレーン8、工事用仮設建屋を解体して、自走式クレーンで搬出する。
こうして新コークス炉1の建設工事が終了する。既に説明した通り従来の建設工事の工程は炉体工事と基礎工事に大別されるが、本発明では基礎工事を行なう必要がないので、炉体工事が終了すれば、建設工事も終了する。
新コークス炉1の建設工事が終了した後、稼働を開始するまでの立ち上げ期間に行なう作業(たとえば炉体の昇温等)は、旧コークス炉と同様の手順で行なう。
In addition, a new coal car and new ceiling piping will be installed in the new ceiling 2.
Finally, the construction scaffold 7, the construction overhead crane 8, and the construction temporary building are dismantled and carried out by the self-propelled crane.
Thus, the construction work of the new coke oven 1 is completed. As described above, the conventional construction work process is roughly divided into the furnace body work and the foundation work. However, since the present invention does not require the foundation work, the construction work is completed when the furnace body work is completed.
After the construction work of the new coke oven 1 is completed, the work (for example, the temperature rise of the furnace body) performed during the start-up period until the start of operation is performed in the same procedure as the old coke oven.

本発明を適用して、50燃焼室を備えたコークス炉の解体建設工事を行なった。すなわち、旧コークス炉の解体工事を行なって炉体を解体し、基礎構造物を既存の場所に残置して、解体工事を終了した。次いで、一体成形ブロックを基礎構造物の上に設置して新コークス炉を建設した。これを発明例とする。   The present invention was applied to the dismantling construction work of a coke oven having 50 combustion chambers. That is, the dismantling work of the old coke oven was performed to dismantle the furnace body, the foundation structure was left in the existing place, and the dismantling work was completed. Then, the integrally formed block was installed on the substructure to construct a new coke oven. This is an invention example.

発明例の一連の解体建設工事の工程のうち、旧コークス炉の解体工事は従来の方法と同等であるから、新コークス炉(すなわち天井部、燃焼室、蓄熱室、下部水平煙道、バックステイ、プラットフォーム、天井クレーン)を建設する炉体工事に要した工期、工数、および炉体工事が終了した後の昇温に要した期間を表1に示す。   Among the series of dismantling construction work of the invention example, the dismantling work of the old coke oven is the same as the conventional method, so that the new coke oven (that is, the ceiling part, the combustion chamber, the heat storage chamber, the lower horizontal flue, the back stay). Table 1 shows the construction period, man-hours required for the furnace body construction for constructing the platform, and the overhead crane, and the period required for the temperature rise after the completion of the furnace body construction.

また、比較のために、従来の耐火煉瓦を積み上げて炉体工事を行なった実績を解析して、炉体工事に要した工期、工数、および炉体工事が終了した後の昇温に要した期間を調査した。その結果を、比較例として表1に示す。なお比較例のデータには、基礎構造物を構築する基礎工事に要する工期や工数は含まれていない。   For comparison, the results of stacking conventional refractory bricks and performing the furnace body construction were analyzed, and the construction period, man-hours required for the furnace body construction, and the temperature rise after the furnace body construction were completed were required. I investigated the period. The results are shown in Table 1 as a comparative example. The data of the comparative example does not include the construction period and man-hours required for the foundation work for constructing the foundation structure.

Figure 2020070341
Figure 2020070341

表1から明らかなように、発明例は、炉体工事の工期および工数が比較例(すなわち煉瓦積みによる炉体工事)よりも大幅に削減された。その理由は、一体成形ブロックを使用することによって、自走式クレーンや天井クレーンを用いたハンドリングの回数を減少することができ、しかも従来のレンガ積み作業が皆無となり目地の仕上げに掛かる負荷も軽減できるからである。   As is clear from Table 1, in the inventive example, the construction period and the number of steps of the furnace body construction were significantly reduced as compared with the comparative example (that is, the furnace body construction by brick laying). The reason is that by using an integrally molded block, the number of times of handling using a self-propelled crane or an overhead crane can be reduced, and the conventional brick laying work is eliminated, and the load on joint finishing is also reduced. Because you can.

また、発明例は要所要所に非膨張耐火材からなる一体成形ブロックを使用することによって高精度炉体構築は勿論、昇温に要する期間も短縮された。炉体を短期間で昇温すれば、新コークス炉の建設から稼働に到る立ち上げ期間の短縮に寄与する。   Further, in the invention examples, by using the integrally molded block made of non-expandable refractory material in the required places, not only the construction of the high-precision furnace body but also the period required for the temperature rise was shortened. If the temperature of the furnace body is raised in a short period of time, it will contribute to shortening the start-up period from construction to operation of the new coke oven.

1 新コークス炉
2 新天井部
3 新燃焼室
4 新蓄熱室
5 新下部水平煙道
6 新バックステイ
7 工事用足場
8 工事用天井クレーン
9 自走式クレーン
1 New Coke Oven 2 New Ceiling 3 New Combustion Chamber 4 New Heat Storage Chamber 5 New Lower Horizontal Flue 6 New Back Stay 7 Construction Scaffold 8 Construction Overhead Crane 9 Self-propelled Crane

Claims (3)

老朽化した既存の旧コークス炉の旧装炭車、旧天井配管、旧バックステイ、旧天井部、旧燃焼室、旧蓄熱室、旧下部水平煙道を解体して搬出し、前記旧コークス炉の基礎構造物を既存の場所に残置して、該基礎構造物の上に新規の新コークス炉を建設するコークス炉の解体建設方法において、
前記旧コークス炉に配設される旧装炭車、旧天井配管、旧バックステイを解体して自走式クレーンで搬出し、さらに、前記旧コークス炉の耐火煉瓦で構成される前記旧天井部、前記旧燃焼室を解体して不定形の解体煉瓦塊とし、前記自走式クレーンを用いて前記解体煉瓦塊を搬出し、引き続き、工事用仮設建屋を設置して前記基礎構造物の上方の空間を覆い、該工事用仮設建屋の内部に工事用天井クレーン、工事用足場を設置した後、前記旧蓄熱室、前記旧下部水平煙道を解体して不定形の蓄熱室解体物、煙道解体物とし、前記自走式クレーンを用いて前記蓄熱室解体物、前記煙道解体物を搬出することによって、前記基礎構造物を既存の場所で露出させ且つ残置し、
次いで、前記自走式クレーンを用いて煙道用一体成形ブロックを前記基礎構造物上に設置して新規の新下部水平煙道を形成し、引き続き、前記自走式クレーンを用いて蓄熱室用一体成形ブロックを前記新下部水平煙道上に設置して新蓄熱室を構築した後、新バックステイを組み立て、さらに、前記自走式クレーンを用いて燃焼室用一体成形ブロック、天井用一体成形ブロックを順次前記工事用足場へ搬送する一方で、前記工事用天井クレーンを用いて前記工事用足場から前記燃焼室用一体成形ブロック、前記天井用一体成形ブロックを吊り上げて更に前記新バックステイで形成される空間に設置して新燃焼室、新天井部を構築し、次に、前記新天井部に新装炭車、新天井配管を設置した後、前記工事用足場、前記工事用天井クレーン、前記工事用仮設建屋を解体して前記自走式クレーンで搬出することによって新コークス炉を建設することを特徴とするコークス炉の解体建設方法。
Old coal car of old dilapidated old coke oven, old ceiling piping, old back stay, old ceiling, old combustion chamber, old heat storage chamber, old lower horizontal flue were dismantled and taken out, In the method for dismantling and constructing a coke oven, which leaves a substructure at an existing place and constructs a new coke oven on the substructure,
An old coal car disposed in the old coke oven, an old ceiling pipe, an old backstay are disassembled and carried out by a self-propelled crane, and further, the old ceiling portion made of refractory bricks of the old coke oven, The old combustion chamber is dismantled into an amorphous demolition brick lump, the demolition brick lump is carried out by using the self-propelled crane, and subsequently, a temporary building for construction is installed to provide a space above the foundation structure. And disposing the construction overhead crane and the construction scaffolding inside the temporary construction building for construction, and then disassembling the former heat storage chamber and the old lower horizontal flue to disassemble the heat storage chamber and the flue dismantling. As a thing, by carrying out the heat storage chamber dismantled object, the flue dismantled object by using the self-propelled crane, the foundation structure is exposed and left at an existing place,
Then, using the self-propelled crane, an integrally formed block for the flue is installed on the foundation structure to form a new new lower horizontal flue, and subsequently, the self-propelled crane is used for the heat storage chamber. After constructing a new heat storage chamber by installing an integral molding block on the new lower horizontal flue, assembling a new back stay, and further using the self-propelled crane, integral molding block for combustion chamber, integral molding block for ceiling Are sequentially transferred to the construction scaffold, and the combustion chamber integrated molding block and the ceiling integrated molding block are lifted from the construction scaffold using the construction ceiling crane, and further formed by the new back stay. Installed in a space where a new combustion chamber and a new ceiling are constructed, and then a new coal car and a new ceiling pipe are installed in the new ceiling, and then the scaffold for construction, the overhead crane for construction, and the construction Dismantling the construction method of the coke oven, characterized by the construction of a new coke oven by by disassembling the use temporary building unloaded by the self-propelled crane.
前記燃焼室用一体成形ブロックとして非膨張性耐火材からなる一体成形ブロックを用いることを特徴とする請求項1に記載のコークス炉の解体建設方法。   The coke oven dismantling construction method according to claim 1, wherein an integrally formed block made of a non-expandable refractory material is used as the integrally formed block for the combustion chamber. 前記新蓄熱室の上層部に配置する蓄熱室用一体成形ブロックとして非膨張性耐火材からなる一体成形ブロックを用いることを特徴とする請求項1または2に記載のコークス炉の解体建設方法。   The method for constructing and disassembling a coke oven according to claim 1 or 2, wherein an integrally formed block made of a non-expandable refractory material is used as the integrally formed block for the heat storage chamber arranged in the upper layer portion of the new heat storage chamber.
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