JP5005405B2 - Boiler disassembly method - Google Patents

Boiler disassembly method Download PDF

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JP5005405B2
JP5005405B2 JP2007087777A JP2007087777A JP5005405B2 JP 5005405 B2 JP5005405 B2 JP 5005405B2 JP 2007087777 A JP2007087777 A JP 2007087777A JP 2007087777 A JP2007087777 A JP 2007087777A JP 5005405 B2 JP5005405 B2 JP 5005405B2
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boiler
support
receiving member
dismantling
support receiving
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JP2008248486A (en
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佳秀 吉野
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Besterra Co Ltd
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本発明は、ボイラ解体方法に関し、特に、火力発電所に設置される自然循環式や強制循環式等のボイラで、かつ、支持構造物(ボイラ建屋)によって上方から支持された状態で設置される、いわゆる、トップサポート方式の大型ボイラ解体方法に関する。   The present invention relates to a boiler dismantling method, and in particular, is installed in a state of being supported from above by a support structure (boiler building), such as a natural circulation type or forced circulation type boiler installed in a thermal power plant. The present invention relates to a so-called top support type large boiler dismantling method.

例えば、火力発電所では、発電用のタービンを回したり、その他必要なエネルギーを得るために、高温高圧の蒸気を発生させる装置としてボイラが使用される。図16は、火力発電所で使用される大型のボイラを示した説明図である。大型のボイラ10は、通常1000トンを超える重量を有しており、その設置は大型の構造体であるボイラ建屋12に上方から吊り下げられて設置されたトップサポート方式がとられている。具体的には、主に鉄骨で構成された支持柱12aと建屋構成梁12bから成るボイラ建屋12にその上部の支持天井梁12cにて吊り下げられた状態で保持されている。すなわち、ボイラ建屋12の支持天井梁12cに複数(例えば、20〜100本)の吊り具14の一端を結合させ、他端をボイラ10の天井部10aに結合させ、これにより、ボイラ10を支持天井梁12cから吊り下げているものである。   For example, in a thermal power plant, a boiler is used as a device for generating high-temperature and high-pressure steam in order to turn a turbine for power generation or obtain other necessary energy. FIG. 16 is an explanatory view showing a large boiler used in a thermal power plant. The large boiler 10 normally has a weight exceeding 1000 tons, and the installation is a top support system in which the large boiler 10 is suspended from above and installed in the boiler building 12 which is a large structure. Specifically, it is held in a state in which it is suspended by a support ceiling beam 12c on the upper part of the boiler building 12 composed of a support column 12a mainly composed of a steel frame and a building constituting beam 12b. That is, one end of a plurality of (for example, 20 to 100) suspension members 14 is coupled to the support ceiling beam 12c of the boiler building 12, and the other end is coupled to the ceiling portion 10a of the boiler 10, thereby supporting the boiler 10. It is suspended from the ceiling beam 12c.

一般にボイラ10は、火炉部20と後伝部22とで主に構成されており、火炉部20は、通常、縦方向に長い形状を有しており、内部は空洞となっている。そして、側部壁に設置された複数のバーナー(図示せず)を使用して火炉部20内部で燃料を燃焼させ、燃焼ガスを発生させる。また、火炉部20の下端部には、下方向に沿って漸次縮径するテーパー状のホッパ部23が設けられている。このホッパ部23は、燃料を燃焼させた際に発生するカスを一箇所に集めて廃棄しやすくするように設けられたものである。   In general, the boiler 10 is mainly composed of a furnace section 20 and a rear transmission section 22, and the furnace section 20 usually has a shape that is long in the vertical direction, and the inside is hollow. And a fuel is burned inside the furnace part 20 using the some burner (not shown) installed in the side wall, and combustion gas is generated. Further, a tapered hopper portion 23 that gradually decreases in diameter along the lower direction is provided at the lower end portion of the furnace portion 20. The hopper portion 23 is provided so as to make it easy to collect and discard waste generated when the fuel is burned.

後伝部22は、火炉部20の側方に位置し、上部で火炉部20と連通した構成を有している。そして、後伝部22内部も空洞に形成されており、この空洞部に、蒸気を過熱する複数の過熱器24等が設置されている。   The rear transmission unit 22 is located on the side of the furnace unit 20 and has a configuration communicating with the furnace unit 20 at the upper part. And the inside of the rear transmission part 22 is also formed in the cavity, and the several superheater 24 etc. which superheat a vapor | steam are installed in this cavity part.

火炉部20内部で発生した燃焼ガスは、図示した矢印200、202の方向に流れ、この燃焼ガスの熱を過熱器24で熱交換した過熱蒸気により、発電用のタービンを回して電気的エネルギーを得るものである。また、過熱器24で熱交換された燃焼ガス、すなわち、温度が低下した燃焼ガスは、図中二点鎖線で示した煙道26を通り、更に図示していない電気集塵器を介して排出される。ここで、過熱器24の具体例としては、内部に水や蒸気を通すパイプが屈曲して形成された過熱器(スーパーヒーター)や、これと同様の構成を有する節炭器(エコノマイザー)等が例示される。   Combustion gas generated inside the furnace section 20 flows in the directions of the arrows 200 and 202 shown in the figure, and the superheated steam obtained by exchanging the heat of the combustion gas in the superheater 24 rotates the power generation turbine to generate electrical energy. To get. Further, the combustion gas heat-exchanged by the superheater 24, that is, the combustion gas whose temperature has decreased, passes through the flue 26 shown by a two-dot chain line in the figure, and is further discharged through an electric dust collector (not shown). Is done. Here, as a specific example of the superheater 24, a superheater (super heater) formed by bending a pipe through which water or steam passes, an economizer having the same configuration as this, or the like Is exemplified.

ボイラ及びその付帯設備の老朽化によるメンテナンス費用の増加や燃焼効率の低下等の理由により、上述した大型のボイラ10を解体する必要が生じることがある。しかし、上述のようなボイラ10は、25m〜60m程度の高さを有し、しかもボイラ建屋12に吊られて保持されているので、通常の地面に建てられた建造物よりも解体が難しい。そこで、例えば、特許文献1、2に記載されたようなボイラの解体方法が開発された。   The large boiler 10 described above may need to be dismantled for reasons such as an increase in maintenance costs due to aging of the boiler and its associated facilities, and a reduction in combustion efficiency. However, since the boiler 10 as described above has a height of about 25 m to 60 m and is suspended and held by the boiler building 12, it is more difficult to disassemble than a building built on a normal ground. Therefore, for example, a boiler disassembly method as described in Patent Documents 1 and 2 has been developed.

特許文献1には、ボイラ(1)を吊るトップガーダ(3)の二つの端部に、それぞれジャッキ(5)を設置し、そのジャッキ(5)から延びる吊り材(6)をトップガーダ(3)に掛止し、トップガーダ(3)においてジャッキ(5)が設置された部分側がボイラ建屋(2)側に残り、かつ、ボイラ(1)が、トップガーダ(3)においてジャッキ(5)から延びる吊り材(6)が掛止された部分側と共に、ボイラ建屋(2)から分離するようトップガーダ(3)を切断し、ジャッキ(5)を動作させて、ボイラ(1)を、トップガーダ(3)においてジャッキ(5)から延びる吊り材(6)が掛止された部分側と共に下降させ、下降させたボイラ(1)を下部から解体し、ボイラ建屋(2)を上部から解体するボイラ及びボイラ建屋の解体方法が記載されている。   In Patent Document 1, a jack (5) is installed at each of two ends of a top girder (3) that suspends a boiler (1), and a hanger (6) extending from the jack (5) is attached to a top girder (3). ), The part side where the jack (5) is installed in the top girder (3) remains on the boiler building (2) side, and the boiler (1) is removed from the jack (5) in the top girder (3). The top girder (3) is cut so as to be separated from the boiler building (2) together with the part side on which the extending suspension material (6) is hooked, and the jack (5) is operated to connect the boiler (1) to the top girder. In (3), the hoisting member (6) extending from the jack (5) is lowered together with the hooked part side, the lowered boiler (1) is disassembled from the lower part, and the boiler building (2) is dismantled from the upper part. And dismantling the boiler building The law has been described.

また、特許文献2に記載のボイラ解体方法では、ボイラ建屋の頂部に設けたジャッキにより昇降する昇降フレームをボイラの下方に設置し、この昇降フレームによりボイラを下方から支持しつつ、ボイラを最下部からブロック状に切断し昇降フレームに載せ、この切断されたボイラの部分を昇降フレームで地上の解体作業場に搬送し、その切断されたボイラの部分を解体する。そして、この作業をボイラが完全に解体されるまで繰り返すという記載がある。   Moreover, in the boiler dismantling method described in Patent Document 2, a lifting frame that is lifted and lowered by a jack provided at the top of the boiler building is installed below the boiler, and the boiler is supported at the bottom while the boiler is supported from below by the lifting frame. Then, it is cut into a block shape and placed on a lifting frame, and the cut boiler portion is transported to the ground demolition work place by the lifting frame, and the cut boiler portion is disassembled. There is a description that this operation is repeated until the boiler is completely dismantled.

なお、ボイラ10内部に設けられている過熱器24は、通常、パイプを屈曲させて形成されており、パイプ内部に蒸気を通し、ボイラ内部で発生した熱により、この蒸気を高温にまで過熱している。また、ボイラ10内壁部にも熱交換等の目的で内部に温水や蒸気を通す配管が設けられている。   In addition, the superheater 24 provided in the boiler 10 is normally formed by bending a pipe. Steam is passed through the pipe, and the steam is heated to a high temperature by heat generated in the boiler. ing. In addition, a pipe through which warm water or steam passes is provided in the inner wall of the boiler 10 for the purpose of heat exchange or the like.

従って、通常、ボイラ10を解体する場合には、ボイラ内部を十分に冷却し、更に、所定の作業を行い、過熱器24等の配管内部圧力が作業を行う上で、問題のない範囲に設定されたことを確認した上で行われる。   Therefore, normally, when the boiler 10 is dismantled, the inside of the boiler is sufficiently cooled, and further, a predetermined operation is performed, and the internal pressure of the piping such as the superheater 24 is set within a range that does not cause a problem. Confirmed that it was done.

特開平11−270154号公報Japanese Patent Laid-Open No. 11-270154 特開2003−301617号公報JP 2003-301617 A

特許文献1の解体方法では、ボイラ(1)の重量をボイラ建屋(2)のトップガーダ(3)の両端部に設けられるジャッキ(5)で支えながら、ジャッキ(5)が設けられた両端部を残して切断されたトップガーダ(3)と共にボイラ(1)を徐々に下に降ろしながら少しずつ解体していく。しかし、ジャッキ(5)は、トップガーダ(3)の大部分とボイラ(1)の全体という極めて大きな重量を支えつつ下降させる必要があるので、作業に大きな危険をともなうという問題があった。   In the dismantling method of patent document 1, the both ends provided with the jack (5) while supporting the weight of the boiler (1) by the jack (5) provided at both ends of the top girder (3) of the boiler building (2). The top girder (3) that has been cut to leave the boiler (1) is gradually disassembled while being gradually lowered. However, since the jack (5) needs to be lowered while supporting the extremely large weight of most of the top girder (3) and the whole of the boiler (1), there is a problem that the work involves a great risk.

また、特許文献2では、切断されたボイラの一部を昇降フレームで運ぶので、ボイラ全体を吊るす特許文献1の技術に比べると、危険は少ないように思われる。しかし、特許文献2の技術では、昇降台を昇降させるためにワイヤ等の吊り部材をジャッキから昇降台まで吊るさなければならない。ところが、ボイラの周り、特に火炉部の周りには、操作床や配管等の障害物が多くそれが邪魔になり吊り部材を吊るす位置が限定される。従って、ボイラ建屋の頂部上でジャッキの設置場所を確保することが非常に困難であり、実現は難しいという問題があった。   Moreover, in patent document 2, since a part of cut boiler is carried with a raising / lowering frame, compared with the technique of patent document 1 which suspends the whole boiler, there seems to be less danger. However, in the technique of Patent Document 2, a lifting member such as a wire must be hung from the jack to the lifting platform in order to raise and lower the lifting platform. However, there are many obstacles such as operation floors and pipes around the boiler, particularly around the furnace section, and the positions where the obstacles are hindered are hung. Therefore, it is very difficult to secure a jack installation place on the top of the boiler building, and there is a problem that it is difficult to realize.

本発明は、このような事情に鑑みてなされたものであり、その目的は、危険をともなうボイラの吊り下げ作業を回避することができると共に、ボイラの周辺の障害物に阻害されることなく実行することのできるボイラ解体方法を提供することにある。   The present invention has been made in view of such circumstances, and its object is to avoid a dangerous boiler suspension operation and to perform without being obstructed by obstacles around the boiler. It is in providing the boiler dismantling method which can be performed.

上記課題を解決するために請求項1に記載のボイラ解体方法は、火炉部と、該火炉部の上方で連結され該火炉部と並列して下方向に延在する後伝部と、を有し、支持構造物に吊り具で吊り下げられて保持されたボイラを解体するボイラ解体方法において、前記火炉部の下端部を切り取って大開口部を設ける大開口部形成工程と、前記火炉部の内部の前記後伝部の下端部の高さ位置の近傍高さ位置に、前記大開口部の下方からの第1支持装置による該火炉部の支持を可能とする第1支持受け部材を設置する第1支持受け部材設置工程と、前記後伝部の下端部に下方からの第2支持装置による該後伝部の支持を可能とする第2支持受け部材を設置する第2支持受け部材設置工程と、前記設置された第1及び第2支持受け部材をそれぞれ前記第1支持装置及び前記第2支持装置により支持して、前記ボイラの全重量を支えるボイラ支持工程と、前記吊り具による吊り下げ状態を解除する吊り下げ状態解除工程と、前記第1及び第2支持装置により前記第1及び第2支持受け部材を下降させ、該ボイラ下方部分の下端部を切断して解体する切断解体作業を行う切断解体作業位置に降ろし、前記ボイラ下方部分の下端部を切断して解体する作業を最下降位置まで繰り返す下降解体工程と、前記下降解体工程の終了後、前記ボイラ上部残存部を前記支持状態を維持しつつ解体するボイラ上部残存部解体工程と、を有することを特徴とする。   In order to solve the above problems, a boiler disassembly method according to claim 1 includes a furnace part, and a rear transmission part that is connected above the furnace part and extends downward in parallel with the furnace part. Then, in a boiler dismantling method for disassembling a boiler that is suspended and held by a support structure, a large opening forming step in which a large opening is provided by cutting off a lower end of the furnace, and A first support receiving member is provided at a height position in the vicinity of the height position of the lower end portion of the rear transmission portion inside so that the furnace portion can be supported by the first support device from below the large opening. A first support receiving member installation step, and a second support receiving member installation step of installing a second support receiving member that enables support of the rear transmission portion by a second support device from below at a lower end portion of the rear transmission portion. And the installed first and second support receiving members respectively for the first support A boiler support step for supporting the entire weight of the boiler supported by the device and the second support device, a suspension state release step for releasing the suspension state by the suspension tool, and the first and second support devices. Lowering the first and second support receiving members, lowering the lower end of the lower part of the boiler and lowering to a cutting / disassembling work position for cutting and disassembling work, and cutting and lowering the lower end of the lower part of the boiler A lowering dismantling step that repeats the operation to the lowest position, and a boiler upper remaining portion dismantling step that dismantles the boiler upper remaining portion while maintaining the support state after completion of the lowering dismantling step. To do.

本発明によれば、火炉部の内部に第1支持受け部材を設置し、後伝部の下端部に第2支持受け部材を設置する。そして、第1支持装置で大開口部の下側から第1支持受け部材を支持すると共に、第2支持装置で第2支持受け部材を支持して、ボイラの重量を支え、ボイラ全体を下降させる。   According to this invention, a 1st support receiving member is installed in the inside of a furnace part, and a 2nd support receiving member is installed in the lower end part of a back transmission part. The first support device supports the first support receiving member from below the large opening, and the second support device supports the second support receiving member to support the weight of the boiler and lower the entire boiler. .

従って、ボイラの重量を下方から支持し、その解体のための下降を行うので、吊り下げ作業を回避することができる。また、本発明では、火炉部の内部の空間を利用して下方からの支持を行うので、この下方からボイラを支持するための準備をボイラ周辺の狭い空間において行う必要がなくなる。   Therefore, since the weight of the boiler is supported from below and lowered for dismantling, the hanging work can be avoided. Moreover, in this invention, since it supports from the downward direction using the space inside a furnace part, it becomes unnecessary to perform preparation for supporting a boiler from the downward direction in the narrow space around a boiler.

そして、ボイラ上部残存部解体工程では、地上に建てられたボイラ上部残存部は、通常の建造物を解体する重機による解体方法を適用できる高さとなっている。従って、ボイラ残存部の解体を通常の地上からの解体作業として行うことが可能となる。   In the boiler upper remaining part dismantling step, the boiler upper remaining part built on the ground has a height that can be applied with a dismantling method using a heavy machine that dismantles a normal building. Therefore, it is possible to dismantle the boiler remaining part as a normal dismantling work from the ground.

請求項2に記載の発明は、請求項1に記載のボイラ解体方法において、前記第1支持受け部材と、前記第2支持受け部材は、梁を格子状に組んで形成したことを特徴とする。   The invention described in claim 2 is the boiler disassembling method according to claim 1, wherein the first support receiving member and the second support receiving member are formed by assembling beams in a lattice shape. .

これにより、例えば、第1支持装置によって第1支持受け部材の梁の1つを支えることによって、その第1支持装置によるこの梁に対する支持力が、この梁と交わる他の梁を介して第1支持受け部材を構成する梁全体に分散される。また、第2支持受け部材も第1支持受け部材と同様の構成であるので、第2支持装置による梁の1つの支持が第2支持受け部材全体に分散される。従って、第1支持受け部材と第2支持受け部材の全体でボイラの重量による負荷に安定して耐えることができる。   Accordingly, for example, by supporting one of the beams of the first support receiving member by the first support device, the support force for the beam by the first support device is changed to the first via the other beam intersecting with the beam. It is distributed over the entire beam constituting the support receiving member. Further, since the second support receiving member has the same configuration as that of the first support receiving member, one support of the beam by the second support device is dispersed throughout the second support receiving member. Accordingly, the entire first support receiving member and the second support receiving member can stably withstand the load due to the weight of the boiler.

請求項3に記載の発明は、請求項2に記載のボイラ解体方法において、前記第1支持受け部材と、第2支持受け部材には、それら双方に跨って伸長する共用梁部材が用いられたことを特徴とする。   According to a third aspect of the present invention, in the boiler disassembling method according to the second aspect, a shared beam member extending across both of the first support receiving member and the second support receiving member is used. It is characterized by that.

これにより、第1及び第2支持装置により第1支持受け部材及び第2支持受け部材を一体的に支持することができ、ボイラ全体の同時支持状態をより安定させることができる。   Accordingly, the first support receiving member and the second support receiving member can be integrally supported by the first and second support devices, and the simultaneous support state of the entire boiler can be further stabilized.

請求項4に記載の発明は、前記共用梁部材は、前記支持構造物まで延在し該支持構造物に固定され、前記ボイラ支持工程において、前記支持構造物の全重量を支持し、前記吊り下げ状態解除工程を行わず、前記下降解体工程の前記切断解体作業において、前記支持構造物の下端部側の切断解体作業も行い、前記ボイラ上部残存部工程において、前記支持構造物の上端部側の解体も行うことを特徴とする。   According to a fourth aspect of the present invention, the common beam member extends to the support structure and is fixed to the support structure. In the boiler support process, the common beam member supports the entire weight of the support structure, and In the cutting and disassembling work of the descending dismantling process without performing the lowered state releasing process, the cutting and dismantling work on the lower end side of the support structure is also performed, and in the boiler upper remaining part process, the upper end side of the support structure It is also characterized by the dismantling of.

本発明によれば、ボイラの解体と共に、支持構造物の解体を同時に行うことができる。従って、ボイラの解体の後に、改めて支持構造物を解体する作業を行う必要がないので、解体作業の効率を著しく向上させることができる。   According to the present invention, it is possible to simultaneously dismantle the support structure together with the dismantling of the boiler. Therefore, since it is not necessary to perform the work of disassembling the support structure again after dismantling the boiler, the efficiency of the dismantling work can be significantly improved.

請求項5に記載の発明は、請求項1〜4の何れか1項に記載のボイラ解体方法において、前記火炉部の天井構造部と前記第1支持受け部材との間に棒状体を設置し、下方からの支持力に対する補強を行ったことを特徴とする。   According to a fifth aspect of the present invention, in the boiler disassembling method according to any one of the first to fourth aspects, a rod-shaped body is installed between the ceiling structure portion of the furnace portion and the first support receiving member. Further, the present invention is characterized by reinforcing the supporting force from below.

これによって、火炉部の天井構造部と第1支持受け部材の間に棒状体を介在させることにより、この棒状体をいわゆるつっかえ棒として機能させたので、下方からの支持力に対する第1支持受け部材の耐力を増加させることができる。   Accordingly, the rod-shaped body is made to function as a so-called replacement rod by interposing the rod-shaped body between the ceiling structure portion of the furnace portion and the first support-receiving member, so that the first support-receiving member with respect to the support force from below is provided. The proof stress can be increased.

本発明にかかるボイラ解体方法によれば、ボイラを解体するために下降させる作業を、火炉部の内部の空間を利用して行うことができるので、ボイラを下方から支持するための準備を、ボイラ周辺の狭い空間における作業を行うことなく達成することができる。そして、最終的にボイラ上部残存部が下降の最下点位置に到達すると、ボイラ上部残存部は、支持構造物に吊り下げられた不安定なものではなくなり、通常の地上に建てられた建造物と同様に地上から重機で容易に解体することができる。従って、危険を伴うボイラの吊り下げ作業を回避することができると共に、その解体作業をボイラの周辺の障害物に阻害されることなく実行することができる。   According to the boiler disassembling method according to the present invention, the operation of lowering the boiler to be disassembled can be performed using the space inside the furnace section, and therefore the preparation for supporting the boiler from below is performed. This can be achieved without performing work in a narrow space around. And when the boiler upper residual part finally reaches the lowest point position of the descent, the boiler upper residual part is no longer unstable that is suspended by the support structure, and is a structure built on the normal ground. It can be easily dismantled from the ground with heavy machinery. Accordingly, it is possible to avoid a dangerous boiler hanging work and to perform the dismantling work without being obstructed by obstacles around the boiler.

以下、本発明に係る第1及び第2の実施の形態について図面を参照して詳細に説明する。なお、第1及び第2の実施の形態においてボイラの構成に関しては、上述の図16に示すボイラの構成と同様であるので、図16で示される要素と同様のものには同一の符号を付し、その説明を省略する。また、上述の煙道26は、ボイラ10と別体のものであり、通常、ボイラの解体作業が行わる前に比較的容易に除去可能であることから、予め取外されている。   Hereinafter, first and second embodiments of the present invention will be described in detail with reference to the drawings. In the first and second embodiments, the configuration of the boiler is the same as the configuration of the boiler shown in FIG. 16 described above, and therefore the same components as those shown in FIG. The description is omitted. In addition, the above-described flue 26 is separate from the boiler 10 and is normally removed in advance because it can be removed relatively easily before the boiler dismantling operation is performed.

(第1の実施の形態)
図1〜図5は、本実施の形態のボイラ解体方法を説明する説明図であり、図6は、本実施の形態のボイラ解体方法の流れを示すフローチャートである。以下、このフローチャートの手順に従ってボイラ解体方法の説明を行う。
(First embodiment)
1-5 is explanatory drawing explaining the boiler disassembly method of this Embodiment, and FIG. 6 is a flowchart which shows the flow of the boiler disassembly method of this Embodiment. Hereinafter, the boiler disassembly method will be described according to the procedure of this flowchart.

なお、本実施の形態は、ボイラ建屋12の構造は図示の明瞭化のため形態を簡略化して示しており、ボイラ10等の構成も概略形状のみを示している。まず、図6のステップ(以下、単にSという)101において、図1に示す一点鎖線L1で示したラインで、火炉部20の下端部であるホッパ部23を切断し、火炉部20に大開口部30を形成する(大開口部形成工程)。このホッパ部23の切断は、切断用ガスバーナーなどの切断手段を用いて容易に行うことができる。   In the present embodiment, the structure of the boiler building 12 is shown in a simplified form for clarity of illustration, and the configuration of the boiler 10 and the like also shows only a schematic shape. First, in step (hereinafter, simply referred to as S) 101 in FIG. 6, the hopper portion 23, which is the lower end portion of the furnace portion 20, is cut along a line indicated by a one-dot chain line L <b> 1 shown in FIG. The portion 30 is formed (large opening forming step). The hopper portion 23 can be easily cut using a cutting means such as a cutting gas burner.

S102において、図示しない昇降台等の昇降手段によって、作業員がS101で設けられた大開口部30を通って火炉部20の内部に入り、図2に示すように、火炉部20の内部で後伝部22の下端部の高さの近傍高さ位置に、第1支持受け部材36を設置する(第1支持受け部材設置工程)。この第1支持受け部材36は、その構成部材である梁の1つ1つが火炉部20の壁部20aを貫通した状態で、その壁部20aに溶接されることで、火炉部20の内部に固設されている。   In S102, the operator enters the furnace section 20 through the large opening 30 provided in S101 by lifting means such as a lifting platform (not shown), and as shown in FIG. The first support receiving member 36 is installed at a height position in the vicinity of the height of the lower end portion of the transmission portion 22 (first support receiving member installation step). The first support receiving member 36 is welded to the wall portion 20a in a state where each of the beams that are constituent members penetrates the wall portion 20a of the furnace portion 20, so that the inside of the furnace portion 20 is provided. It is fixed.

図7(A)には、第1支持受け部材36の設置構造を下方から視た概要が示されている。図示のように、第1支持受け部材36は、3本の梁37と、この梁37と直交した状態で設置される4本の梁39により構成されている。この第1支持受け部材36を構成する梁37及び梁39は、例えば、鋼鉄等の剛性の高い材料であり、これら梁37、梁39は、上述のように、それぞれの端部で火炉部20の壁部20aを貫通した状態で、その壁部20aに溶接されて固定されている。また、これら梁37と梁39が、相互に交わる位置で溶接されており、全体として格子形状をなしている。   FIG. 7A shows an overview of the installation structure of the first support receiving member 36 as viewed from below. As illustrated, the first support receiving member 36 includes three beams 37 and four beams 39 installed in a state orthogonal to the beams 37. The beam 37 and the beam 39 constituting the first support receiving member 36 are made of a material having high rigidity such as steel, for example, and as described above, the beam 37 and the beam 39 are at the furnace portion 20 at their respective end portions. In the state which penetrated the wall part 20a, it is welded and fixed to the wall part 20a. Further, the beam 37 and the beam 39 are welded at positions where they cross each other, and form a lattice shape as a whole.

また、上述の梁37と梁39の壁部20aへの溶接作業は、作業員が昇降台や作業用ゴンドラ等の昇降手段を用いて、大開口部30を通って第1支持受け部材36の設置予定位置まで上昇し行う。なお、上述のような昇降手段は、例えば、特開平11−50651や特開平11−131789等に記載された狭い開口を通ることが可能な昇降手段を用いても良いし、或いは、大開口部30から火炉部20の内部に入ることが可能な程度の大きさの種々の昇降台や作業用ゴンドラを用いても良い。   Further, the welding operation of the beam 37 and the beam 39 to the wall portion 20a is performed by an operator using the lifting means such as a lifting platform or a work gondola to pass through the large opening 30 and the first support receiving member 36. Ascend to the planned installation position. As the lifting means as described above, for example, lifting means capable of passing through a narrow opening described in JP-A-11-50651, JP-A-11-131789, or the like may be used, or a large opening portion may be used. Various lifting platforms and work gondola of a size that can enter the inside of the furnace unit 20 from 30 may be used.

本実施の形態では、S101において大開口部30を火炉部20に設けているので、大開口部30を用いて、地上から作業位置までの作業員の上昇や荷物の運搬を容易に行うことができる。また、第1支持受け部材36を構成する各梁の数として、梁37を3本、梁39を4本としたが、各梁の数は、これに限られるものではない。   In the present embodiment, since the large opening 30 is provided in the furnace unit 20 in S101, it is possible to easily raise the worker from the ground to the work position and transport the luggage using the large opening 30. it can. In addition, the number of each beam constituting the first support receiving member 36 is three beams 37 and four beams 39, but the number of each beam is not limited to this.

S103において、後伝部22の下端部22aに第2支持受け部材38を設置する(第2支持受け部材設置工程)。図7(B)に第2支持受け部材38の設置構造の概要を示す。この第2支持受け部材38の設置は、先ず、梁43を後伝部22の下端部22aの底面と溶接して後伝部22に固定し、次に、下端部22aの底面に溶接された梁43と略直交する状態で、梁41を梁43に溶接して梁43に固定することで行われる。   In S103, the 2nd support receiving member 38 is installed in the lower end part 22a of the rear transmission part 22 (2nd support receiving member installation process). FIG. 7B shows an outline of the installation structure of the second support receiving member 38. In the installation of the second support receiving member 38, the beam 43 is first welded to the bottom surface of the lower end portion 22a of the rear transmission portion 22 and fixed to the rear transmission portion 22, and then welded to the bottom surface of the lower end portion 22a. This is performed by welding the beam 41 to the beam 43 and fixing it to the beam 43 in a state substantially orthogonal to the beam 43.

S104において、図3に示すように、火炉部20の大開口部30の略直下位置に、伸長部40aを有する第1支持装置としてのジャッキ40を設置し、後伝部22の略直下位置に伸長部42aを有する第2支持装置としてのジャッキ42をそれぞれ設置する。そして、伸長部40a、42aを伸長させ第1支持受け部材36、38をそれぞれ支持する(ボイラ支持工程)。これによって、ボイラの重量を、ほぼ伸長部40a、42aによって支持された状態とする。本実施の形態では、ジャッキ40の伸長部40aを伸長させ、第1支持受け部材36の梁37に当接させることにより、ジャッキ40による第1支持受け部材36の支持が行われる。また、ジャッキ42の伸長部42aは、伸長状態で第2支持受け部材38の梁41に当接させることによって、ジャッキ42による第2支持受け部材38の支持が行われる。   In S104, as shown in FIG. 3, the jack 40 as the first support device having the extended portion 40a is installed at a position almost directly below the large opening 30 of the furnace section 20, and at a position just below the rear transmission section 22. The jacks 42 as the second support devices having the extending portions 42a are respectively installed. Then, the extending portions 40a and 42a are extended to support the first support receiving members 36 and 38, respectively (boiler support step). As a result, the weight of the boiler is almost supported by the extending portions 40a and 42a. In the present embodiment, the extension portion 40 a of the jack 40 is extended and brought into contact with the beam 37 of the first support receiving member 36, whereby the first support receiving member 36 is supported by the jack 40. Further, the extension portion 42 a of the jack 42 is brought into contact with the beam 41 of the second support receiving member 38 in an extended state, whereby the second support receiving member 38 is supported by the jack 42.

ここで、使用するジャッキ40、42は、例えば、径の異なる複数の筒状体で構成された伸長部40a、42aを有している。伸長部42aは、通常は、各筒状体が互いに重なりあって収納された収縮状態となっている。そして、油圧等により径の小さい筒状体が径の大きい筒状体の上に伸長し、全体として伸長部42aが略鉛直方向に伸長する(本実施の形態では数十メートル程度)構成になっている。   Here, the jacks 40 and 42 to be used have elongate parts 40a and 42a comprised by the several cylindrical body from which a diameter differs, for example. The extending portion 42a is normally in a contracted state in which the cylindrical bodies are stored so as to overlap each other. And a cylindrical body with a small diameter is extended on a cylindrical body with a large diameter by hydraulic pressure or the like, and the extended portion 42a as a whole extends in a substantially vertical direction (in this embodiment, about several tens of meters). ing.

なお、図では、ジャッキ40が3台、ジャッキ42が2台図示されているが、ジャッキの数は、これに限られるものではなく、火炉部20や後伝部22の重量に応じて台数を適宜調節できる。   In the figure, three jacks 40 and two jacks 42 are shown. However, the number of jacks is not limited to this, and the number of jacks depends on the weight of the furnace unit 20 and the rear transmission unit 22. It can be adjusted as appropriate.

本実施の形態では、上述のように、第1支持受け部材36及び第2支持受け部材38は、格子状に梁が設置されることで構成されているので、ジャッキ40、42の伸長部40a、42aが、それぞれ梁37、41にのみ当接している場合でも、ジャッキ40、42の支持力がそれぞれ第1支持受け部材36及び第2支持受け部材38を構成する梁全体に分散される。従って、結果的にボイラの重量を、第1支持受け部材36及び第2支持受け部材38を構成する梁全体によって安定した状態で支えることができる。   In the present embodiment, as described above, since the first support receiving member 36 and the second support receiving member 38 are configured by installing beams in a lattice shape, the extending portions 40a of the jacks 40, 42 are provided. , 42 a are in contact with only the beams 37, 41, respectively, the support force of the jacks 40, 42 is distributed over the entire beams constituting the first support receiving member 36 and the second support receiving member 38, respectively. Accordingly, as a result, the weight of the boiler can be supported in a stable state by the entire beam constituting the first support receiving member 36 and the second support receiving member 38.

また、本実施の形態では、第1支持受け部材36を支持する伸長部40aを、大開口部30に通すので、火炉部20の周辺にある図示しない操作床や配管等の障害物に妨げられることなく、火炉部20の支持を行うことができる。   Further, in the present embodiment, since the extended portion 40a that supports the first support receiving member 36 is passed through the large opening 30, it is obstructed by obstacles such as an operation floor and piping (not shown) around the furnace portion 20. The furnace part 20 can be supported.

S105において、一点鎖線L2で示すラインで吊り具14を切断し、吊り具14によるボイラの吊り下げ状態を解除する(吊り下げ状態解除工程)。なお、この吊り具の切断は、バーナー等を用いて行われる。   In S105, the hanging tool 14 is cut along the line indicated by the alternate long and short dash line L2, and the suspended state of the boiler by the suspended tool 14 is released (hanging state releasing step). In addition, this hanging tool is cut using a burner or the like.

S106において、図4に示されるように、ジャッキ40、42の伸長部40a、42aをほぼ同時に収縮させ、ボイラ下端部側部分10bが地面11の近傍に到達するまで、下降させる。すなわち、一点鎖線L3より下方の火炉部20の部分を、地上にいる作業員が切断除去できる位置までボイラ10全体を下降させる。そして、ボイラ下端部側部分10bの一点鎖線L3より下側の部分を切断して、その切断したボイラ下端部側部分10bを解体除去する。その後、第1支持受け部材36よりも下方の火炉部20の部分が完全に解体除去されるまで、このボイラ10の下降と、ボイラ下端部側部分10bの解体除去作業を繰り返す(下降解体工程)。   In S <b> 106, as shown in FIG. 4, the extension portions 40 a and 42 a of the jacks 40 and 42 are contracted almost simultaneously, and are lowered until the boiler lower end side portion 10 b reaches the vicinity of the ground 11. That is, the entire boiler 10 is lowered to a position where a worker on the ground can cut and remove the portion of the furnace section 20 below the one-dot chain line L3. And the part below the dashed-dotted line L3 of the boiler lower end part 10b is cut | disconnected, and the cut boiler lower end part 10b is disassembled and removed. Thereafter, the lowering of the boiler 10 and the disassembling / removing operation of the boiler lower end side portion 10b are repeated until the portion of the furnace section 20 below the first support receiving member 36 is completely disassembled and removed (lowering dismantling process). .

S107において、S106の後、ボイラ下端部側部分10bが完全に解体除去されると、図5に示すように、ボイラ上部残存部10cが地面11の略近傍位置まで下降された状態となる。このとき、ボイラ上部残存部10cは、元のボイラ10の高さに比べて、低くなり、しかも吊るされた状態が解除され下方で支持された状態となっている。従って、通常の地上に建てられた建造物と同様に、解体用重機によって容易かつ安全に解体することができる。(上部残存部解体工程)。これにより、従来と比べ解体作業が著しく簡素化され、その解体作業にかかるコストも大幅に削減することができる。   In S107, after S106, when the boiler lower end portion 10b is completely disassembled and removed, the boiler upper portion 10c is lowered to a position near the ground 11 as shown in FIG. At this time, the boiler upper remaining part 10c is lower than the height of the original boiler 10, and the suspended state is released and supported below. Therefore, it can be dismantled easily and safely by a heavy machine for dismantling, like a normal building on the ground. (Upper remaining part dismantling process). As a result, the dismantling operation is remarkably simplified as compared with the conventional case, and the cost for the dismantling operation can be greatly reduced.

なお、上述の重機によるボイラ上部残存部10cの解体をボイラ建屋12の外から行う場合には、例えば、ボイラ建屋12の一部分に解体用重機のアタッチメントを通すことのできる大きさの開口を設け、重機をボイラ建屋12の外に設置し、その開口から上記アタッチメントを通す等して行う。   In addition, when performing dismantling of the boiler upper part 10c by the above-described heavy machinery from the outside of the boiler building 12, for example, an opening having a size capable of passing the attachment of the heavy machinery for dismantling is provided in a part of the boiler building 12, A heavy machine is installed outside the boiler building 12, and the attachment is passed through the opening.

以上により、本実施の形態のボイラ解体方法によれば、火炉部20の内部に第1支持受け部材36を設置し、後伝部の下端部に第2支持受け部材38を設置する。そして、ジャッキ40の伸長部40aで大開口部30の下側から第1支持受け部材36を支持すると共に、ジャッキ42の伸長部42aで第2支持受け部材38を支持して、ボイラ10の重量を支え、ボイラ10全体を下降させる。   As described above, according to the boiler dismantling method of the present embodiment, the first support receiving member 36 is installed inside the furnace unit 20 and the second support receiving member 38 is installed at the lower end of the rear transmission unit. The extension portion 40 a of the jack 40 supports the first support receiving member 36 from the lower side of the large opening 30, and the extension portion 42 a of the jack 42 supports the second support receiving member 38 to weight the boiler 10. And lower the entire boiler 10.

従って、ボイラの重量を下方から支持し、その解体のための下降を行うので、吊り下げ作業を回避することができる。また、本発明では、火炉部20の内部の空間を利用して下方からの支持を行うので、この下方からボイラ10を支持するための準備をボイラ周辺の狭い空間において行う必要がなくなる。これにより、危険を伴うボイラ10の吊り下げ作業を回避することができると共に、その解体作業をボイラ10の周辺の配管等の障害物に阻害されることなく実行することができる。   Therefore, since the weight of the boiler is supported from below and lowered for dismantling, the hanging work can be avoided. Further, in the present invention, since the space inside the furnace unit 20 is used to support from below, it is not necessary to prepare for supporting the boiler 10 from below in a narrow space around the boiler. Thereby, the hanging operation of the boiler 10 with danger can be avoided, and the disassembling operation can be performed without being obstructed by obstacles such as piping around the boiler 10.

なお、S102、S103で説明した第1支持受け部材36及び第2支持受け部材38の設置の形態は、本実施の形態のものに限定されることはなく、種々の変更が可能である。例えば、図8は、第1支持受け部材36及び第2支持受け部材38の他の設置の形態を示す図である。   In addition, the installation form of the 1st support receiving member 36 and the 2nd support receiving member 38 demonstrated by S102 and S103 is not limited to the thing of this Embodiment, A various change is possible. For example, FIG. 8 is a diagram showing another form of installation of the first support receiving member 36 and the second support receiving member 38.

図示のように、第1支持受け部材36及び第2支持受け部材38は、上記実施の形態の場合と同様に、梁37、41がそれぞれ設置される。そして、図示のように、上述の図7に示した梁39、43に代えて、火炉部20と後伝部22に跨って伸長する共用梁部材51が設置され、梁37と共用梁部材51で第1支持受け部材36が構成され、梁41と共用梁部材51で第2支持受け部材38が構成されている。   As illustrated, the first support receiving member 36 and the second support receiving member 38 are provided with beams 37 and 41, respectively, as in the case of the above-described embodiment. As shown in the figure, instead of the beams 39 and 43 shown in FIG. 7 described above, a shared beam member 51 extending across the furnace section 20 and the rear transmission section 22 is installed, and the beam 37 and the shared beam member 51 are installed. The first support receiving member 36 is configured, and the beam 41 and the common beam member 51 configure the second support receiving member 38.

図9には、図8に示されるこの共用梁部材51の設置方法を説明する説明図を示す。この共用梁部材51は、設置方法として、例えば、ボイラ建屋12の一部に火炉部20に通じる図示しない開口を設ける。そして、その開口と対向する位置にある火炉部20の壁部20aに壁部開口45を設け、更に、壁部開口45と対向する壁部20aの部分に対向壁部開口46を設ける。そして、共用梁部材51をボイラ建屋12の外側から上記図示しない開口、壁部開口45、対向壁部開口46を通して後伝部22の下端部22aまで到達させ、火炉部20の壁部20aと後伝部22の下端部22aに溶接し、固定する。   FIG. 9 is an explanatory view for explaining a method of installing the shared beam member 51 shown in FIG. For example, the common beam member 51 is provided with an opening (not shown) that leads to the furnace section 20 in a part of the boiler building 12 as an installation method. And the wall part opening 45 is provided in the wall part 20a of the furnace part 20 in the position facing the opening, and also the opposing wall part opening 46 is provided in the part of the wall part 20a facing the wall part opening 45. Then, the common beam member 51 is made to reach the lower end portion 22a of the rear transmission portion 22 from the outside of the boiler building 12 through the opening (not shown), the wall portion opening 45, and the opposing wall portion opening 46, and the wall portion 20a and the rear portion of the furnace portion 20 It welds to the lower end part 22a of the transmission part 22, and fixes.

これにより、ジャッキ40の伸長部40aによる第1支持受け部材36を支持する支持力によって、第2支持受け部材38の支持を補助することができ、また、逆に、ジャッキ42の伸長部42aによる第2支持受け部材38を支持する支持力によって、第1支持受け部材36の支持を補助することができる。従って、ジャッキ40、42によって第1支持受け部材36及び第2支持受け部材38を一体的に支持することができ、ボイラ10全体の支持状態をより安定させることができる。   Accordingly, the support of the second support receiving member 38 can be assisted by the support force for supporting the first support receiving member 36 by the extending portion 40a of the jack 40, and conversely, by the extending portion 42a of the jack 42. Support of the first support receiving member 36 can be assisted by the support force for supporting the second support receiving member 38. Therefore, the first support receiving member 36 and the second support receiving member 38 can be integrally supported by the jacks 40 and 42, and the support state of the entire boiler 10 can be further stabilized.

また、図10には、第1支持受け部材36に補強材として棒状体48を設置した状態を概略的に示す図である。図示のように、支持天井梁12cに棒状体48の一端48aが固設され、他端48bが第1支持受け部材36の梁39に固設されている。   FIG. 10 is a diagram schematically showing a state in which a rod-like body 48 is installed as a reinforcing material on the first support receiving member 36. As shown in the figure, one end 48 a of a rod-like body 48 is fixed to the support ceiling beam 12 c and the other end 48 b is fixed to the beam 39 of the first support receiving member 36.

この棒状体48には、種々の材料のものが適用できるが、特に、高い剛性を有する鉄等の金属を用いることが好適である。これによって、棒状体48がいわゆるつっかえ棒の役割を果たし、ジャッキ40の伸長部40aによる下方からの支持力に対する耐力を増加させることができる。従って、ボイラの重量による負荷にさらに安定して耐えることができる。
(第2の実施の形態)
図11〜図14は、本実施の形態のボイラ解体方法を説明する説明図である。本実施の形態の特徴的な部分は、ボイラ10の解体と共にボイラ建屋12の解体を同時に行うことにある。なお、第1の実施の形態と同様の要素には、同一の符号を付し、その説明を省略する。
Various materials can be applied to the rod-like body 48, and it is particularly preferable to use a metal such as iron having high rigidity. Thereby, the rod-shaped body 48 plays the role of a so-called refilling rod, and the resistance to the supporting force from below by the extended portion 40a of the jack 40 can be increased. Therefore, it is possible to withstand the load due to the weight of the boiler more stably.
(Second Embodiment)
FIGS. 11-14 is explanatory drawing explaining the boiler disassembly method of this Embodiment. The characteristic part of the present embodiment is that the boiler building 12 is disassembled simultaneously with the dismantling of the boiler 10. In addition, the same code | symbol is attached | subjected to the element similar to 1st Embodiment, and the description is abbreviate | omitted.

まず、図11に示されるように、第1の実施の形態と同様に、火炉部20のホッパ23を切断して大開口部30を形成する(大開口部形成工程)。そして、ボイラ建屋12の支持柱12aから火炉部20、及び、後伝部22に跨るように共用梁部材53を設置する。この共用梁部材53は、上述の共用梁部材51とほぼ同じ材質のものであり、その長手方向は、ボイラ建屋12の横幅よりもやや長く構成されている。   First, as shown in FIG. 11, similarly to the first embodiment, the hopper 23 of the furnace unit 20 is cut to form the large opening 30 (large opening forming step). And the common beam member 53 is installed so that it may straddle the furnace part 20 and the back transmission part 22 from the support pillar 12a of the boiler building 12. FIG. The common beam member 53 is made of substantially the same material as the common beam member 51 described above, and the longitudinal direction thereof is configured to be slightly longer than the horizontal width of the boiler building 12.

なお、この共用梁部材53の設置は、例えば、まず、ボイラ建屋12の後伝部22の高さ位置に共用梁部材53を挿入する開口55、57、共用梁部材53をボイラ建屋12内部から外部に出すための開口59を設け、この開口55、57に対向する火炉部20の壁部20aに壁部開口45を設け、この壁部開口45に対向する壁部20aの部分に対向壁部開口46を設ける。そして、共用梁部材53を、開口55、57を通してボイラ建屋12の内部に挿入し、壁部開口45、対向壁部開口46を通して、開口59から抜ける状態として設置することで行われる。   The common beam member 53 is installed, for example, by first opening the common beam member 53 at the height of the rear transmission portion 22 of the boiler building 12 and the common beam member 53 from the inside of the boiler building 12. An opening 59 for exiting to the outside is provided, a wall opening 45 is provided in the wall portion 20a of the furnace section 20 facing the openings 55 and 57, and a facing wall portion is provided in a portion of the wall portion 20a facing the wall opening 45. An opening 46 is provided. Then, the common beam member 53 is inserted into the boiler building 12 through the openings 55 and 57, and installed so as to be removed from the opening 59 through the wall opening 45 and the opposing wall opening 46.

この共用梁部材53は、第1支持受け部材36及び第2支持受け部材38の構成要素となる。図15に、第1支持受け部材36及び第2支持受け部材38を下方から視た状態を概略的に示している。本実施の形態では、図示のように、共用梁部材53とこの共用梁部材53に直交した状態で設置された梁37によって、火炉部20の第1支持受け部材36が形成される。また、共用梁部材53と梁41によって後伝部22の第2支持受け部材38が形成される(第1支持受け部材設置工程、第2支持受け部材設置工程)。更に、共用梁部材53は、例えば、ボイラ建屋12に共用梁部材53を溶接するための溶接補強梁56(図11〜図14では省略されている)を組み立て、この溶接補強梁56にその両端が溶接されることで、ボイラ建屋12に固設されている。   The shared beam member 53 is a component of the first support receiving member 36 and the second support receiving member 38. FIG. 15 schematically shows a state in which the first support receiving member 36 and the second support receiving member 38 are viewed from below. In the present embodiment, as shown in the figure, the first support receiving member 36 of the furnace section 20 is formed by the shared beam member 53 and the beam 37 installed in a state orthogonal to the shared beam member 53. Further, the shared beam member 53 and the beam 41 form the second support receiving member 38 of the rear transmission portion 22 (first support receiving member installation step, second support receiving member installation step). Furthermore, the common beam member 53 is assembled with, for example, a welding reinforcement beam 56 (not shown in FIGS. 11 to 14) for welding the common beam member 53 to the boiler building 12, and both ends of the common beam member 53 are attached to the welding reinforcement beam 56. Is fixed to the boiler building 12 by welding.

そして、ジャッキ40、42を第1の実施の形態の場合と同様に設置して、伸長部40a、42aを第1支持受け部材36の梁37と第2支持受け部材38の梁41に当接させ、第1支持受け部材36、第2支持受け部材38、共用梁部材53を支持することによって、ボイラ10及びボイラ建屋12の重量を支える(ボイラ及びボイラ建屋支持工程)。   The jacks 40 and 42 are installed in the same manner as in the first embodiment, and the extending portions 40a and 42a are brought into contact with the beam 37 of the first support receiving member 36 and the beam 41 of the second support receiving member 38. The weight of the boiler 10 and the boiler building 12 is supported by supporting the first support receiving member 36, the second support receiving member 38, and the common beam member 53 (boiler and boiler building support process).

また、本実施の形態では、ボイラ建屋12の支持状態を安定させるために、図11に示すように、ボイラ建屋12の最下方部分を一部解体して、ジャッキ40、42よりも小型のジャッキ50を設置し、このジャッキ50によってボイラ建屋12の補助的な支持を行う。ジャッキ50は、ジャッキ40、42とほぼ同様の構造であり、数メートルの長さに伸長する伸長部50aを有している。なお、ジャッキ50は、本実施の形態における必須の要素ではなく、ボイラ建屋12の重量を安定して支持するために、補助的に設置したものである。   Moreover, in this Embodiment, in order to stabilize the support state of the boiler building 12, as shown in FIG. 11, the lowermost part of the boiler building 12 is partially disassembled, and it is a jack smaller than the jacks 40 and 42. 50 is installed, and this jack 50 provides auxiliary support for the boiler building 12. The jack 50 has substantially the same structure as the jacks 40 and 42, and has an extension 50a that extends to a length of several meters. Note that the jack 50 is not an essential element in the present embodiment, and is installed in an auxiliary manner in order to stably support the weight of the boiler building 12.

そして、図12に示すように、ジャッキ40、42の伸長部40a、42aと、短ジャッキ50の伸長部50aをほぼ同時に収縮させ、ボイラ10及びボイラ建屋12を下降させる。火炉部20の下端20bが地面11の近傍に到達すると、その下降を一時停止し、地上11にいる作業員によって、一点鎖線L3より下方にある火炉部20の部分であるボイラ下端部側部分10bと、一点鎖線L3より下方にあるボイラ建屋12の部分であるボイラ建屋下端部側部分12dが、切断され解体除去される。   Then, as shown in FIG. 12, the extended portions 40a, 42a of the jacks 40, 42 and the extended portion 50a of the short jack 50 are contracted almost simultaneously, and the boiler 10 and the boiler building 12 are lowered. When the lower end 20b of the furnace unit 20 reaches the vicinity of the ground 11, the lowering is temporarily stopped, and a worker on the ground 11 stops the boiler lower end side portion 10b which is a portion of the furnace unit 20 below the one-dot chain line L3. Then, the boiler building lower end side portion 12d, which is the portion of the boiler building 12 below the one-dot chain line L3, is cut and disassembled and removed.

そして、この一点鎖線L3より下方にあるボイラ下端部側部分10b及びボイラ建屋下端部側部分12dの解体除去作業が終了した後に、図13に示すように、ジャッキ50の伸長部50aを再び伸長させ、次のボイラ建屋下端部側部分12dの上記切断が行われた部分に当接させる。なお、上述のボイラ建屋下端部側部分12dの切断とジャッキ50の伸長部50aの当接は、例えば、先ず、図12に示される状態からボイラ建屋下端部側部分12dの一部分を先ず切断し、その切断によって除去された部分の直下位置にあるジャッキ50の伸長部50aを伸長させ、その切断が行われた部分に当接させて支持し、その後、他のボイラ建屋下端部側部分12dの部分も同様に切断とジャッキ50による支持を繰り返すことで行われる。すなわち、ボイラ建屋下端部側部分12dの切断と、その切断が行われた部分へのジャッキ50による支持と、が一つずつ交互に実行される。   And after the dismantling removal operation | work of the boiler lower end part 10b and the boiler building lower end part 12d below this dashed-dotted line L3 is complete | finished, as shown in FIG. 13, the expansion part 50a of the jack 50 is extended again. Then, the next boiler building lower end side portion 12d is brought into contact with the cut portion. In addition, the cutting | disconnection of the above-mentioned boiler building lower end part 12d and the contact | abutting of the extension part 50a of the jack 50 first cut | disconnect a part of boiler building lower end part 12d first from the state shown by FIG. The extension part 50a of the jack 50 located immediately below the part removed by the cutting is extended and brought into contact with and supported by the part that has been cut, and then the other boiler building lower end part 12d part Is similarly performed by repeating cutting and supporting by the jack 50. That is, the cutting of the boiler building lower end side portion 12d and the support by the jack 50 to the cut portion are alternately performed one by one.

そして、再びボイラ10及びボイラ建屋12の下降を行い、作業位置で再びボイラ建屋下端部側部分12dを切断除去する。このように、下降と切断除去を繰り返すことによって、共用梁部材53より下側にある火炉部20の部分と、共用梁部材53より下側にあるボイラ建屋12の部分を完全に解体除去する(下降解体工程)。   Then, the boiler 10 and the boiler building 12 are lowered again, and the boiler building lower end portion 12d is cut and removed again at the working position. In this way, by repeating the descending and cutting and removing, the portion of the furnace section 20 below the common beam member 53 and the portion of the boiler building 12 below the common beam member 53 are completely disassembled and removed ( Descending dismantling process).

そして、下降解体工程の終了後、ボイラ下端部側部分10b及びボイラ建屋下端部側部分12dが完全に解体除去されると、図14に示すように、ボイラ上部残存部10cとボイラ建屋上部残存部12eが地面11の略近傍位置まで下降された状態となる。従って、ボイラ建屋上部残存部12eは、ボイラ上部残存部10cと同様に、通常の地上に建てられた建造物のように地上から解体用重機で容易に解体することができる。(上部残存部解体工程)なお、本実施の形態では、ボイラ上部残存部10c及びボイラ建屋上部残存部12eの解体の際に、それらのジャッキ40、42による支持状態を安定させるために、共用梁部材53を端の部分で支える受け架台60が数台設置される。   And after completion | finish of a descent | fall dismantling process, if the boiler lower end part 10b and the boiler building lower end part 12d are completely dismantled and removed, as shown in FIG. 14, the boiler upper part remaining part 10c and the boiler building upper part remaining part 12e is lowered to a position substantially near the ground 11. Therefore, the boiler building upper remaining portion 12e can be easily dismantled from the ground with a heavy machine for dismantling, like a normal building on the ground, like the boiler upper remaining portion 10c. (Upper remaining part dismantling process) In the present embodiment, when the boiler upper remaining part 10c and the boiler building upper remaining part 12e are disassembled, in order to stabilize the support state by the jacks 40, 42, the common beam Several receiving stands 60 that support the member 53 at the end portion are installed.

従って、本実施の形態のボイラ解体方法によれば、ボイラ10の解体と共にボイラ建屋12の解体を行うことができる。従って、ボイラの10の解体の後に、改めてボイラ建屋12を解体する作業を行う必要がないので、ボイラ建屋12の解体を含めたボイラ10の解体作業の効率を著しく向上させることができる。なお、本実施の形態においても、第1の実施の形態の図10に示したような棒状体48を用いることにより、第1支持受け部材の耐力を向上させるようにしても良い。   Therefore, according to the boiler dismantling method of the present embodiment, the boiler building 12 can be dismantled together with the dismantling of the boiler 10. Therefore, since it is not necessary to perform the work of dismantling the boiler building 12 again after dismantling the boiler 10, the efficiency of the dismantling work of the boiler 10 including the dismantling of the boiler building 12 can be significantly improved. Also in this embodiment, the proof stress of the first support receiving member may be improved by using the rod-like body 48 as shown in FIG. 10 of the first embodiment.

なお、本発明は、上記第1及び第2の実施の形態に限定されるものではなく、発明の要旨の範囲内で種々の変更が可能である。   The present invention is not limited to the first and second embodiments described above, and various modifications can be made within the scope of the gist of the invention.

第1の実施の形態の大開口部形成工程を説明する図である。It is a figure explaining the large opening part formation process of 1st Embodiment. 第1の実施の形態の第1支持受け部材設置工程及び第2支持受け部材設置工程を説明する図である。It is a figure explaining the 1st support receiving member installation process and the 2nd support receiving member installation process of a 1st embodiment. 第1の実施の形態のボイラ支持工程を説明する図である。It is a figure explaining the boiler support process of a 1st embodiment. 第1の実施の形態の吊り下げ状態解除工程及び下降解体工程を説明する図である。It is a figure explaining the suspended state cancellation | release process and descent | fall dismantling process of 1st Embodiment. 第1の実施の形態の下降解体工程後の上部残存部を示す図である。It is a figure which shows the upper remaining part after the downward dismantling process of 1st Embodiment. 第1の実施の形態の流れを示すフローチャートである。It is a flowchart which shows the flow of 1st Embodiment. 第1の実施の形態の第1支持受け部材及び第2支持受け部材の設置態様の一例を示す図である。It is a figure which shows an example of the installation aspect of the 1st support receiving member and 2nd support receiving member of 1st Embodiment. 第1支持受け部材及び第2支持受け部材の他の設置態様を示す図である。It is a figure which shows the other installation aspect of a 1st support receiving member and a 2nd support receiving member. 図8に示される第1支持受け部材及び第2支持受け部材の設置方法を説明する図である。It is a figure explaining the installation method of the 1st support receiving member and 2nd support receiving member which are shown by FIG. 第1支持受け部材を補強する棒状体を設けた態様を示す図である。FIG. 6 is a view showing an aspect in which a rod-shaped body that reinforces the first support receiving member is provided. 第2の実施の形態の共用梁部材設置工程及びボイラ支持工程を説明する図である。It is a figure explaining the common beam member installation process and boiler support process of 2nd Embodiment. 第2の実施の形態の下降工程を説明する図である。It is a figure explaining the descent process of a 2nd embodiment. ジャッキでボイラ建屋下端部側部分を支持する状態を示す図である。It is a figure which shows the state which supports a boiler building lower end part side with a jack. 第2の実施の形態の下降解体工程後の上部残存部を示す図である。It is a figure which shows the upper remaining part after the downward dismantling process of 2nd Embodiment. 第1支持受け部材及び第2支持受け部材の他の設置態様を示す図である。It is a figure which shows the other installation aspect of a 1st support receiving member and a 2nd support receiving member. 従来の技術を説明する図である。It is a figure explaining the prior art.

符号の説明Explanation of symbols

10 ボイラ
10b ボイラ下端部側部分
10c ボイラ上部残存部
12 ボイラ建屋(支持構造物)
12d ボイラ建屋下端側部分
12e ボイラ建屋上部残存部
14 吊り具
20 火炉部
22 後伝部
23 ホッパ部(火炉部の下端部)
30 大開口部
36 第1支持受け部材
38 第2支持受け部材
40、42 ジャッキ(支持装置)
40a、42a 伸長部(支持装置)
51 共用梁部材
53 共用梁部材
DESCRIPTION OF SYMBOLS 10 Boiler 10b Boiler lower end side part 10c Boiler upper part 12 Boiler building (support structure)
12d Boiler building lower end side part 12e Boiler building upper part remaining part 14 Hanging tool 20 Furnace part 22 Rear transmission part 23 Hopper part (lower end part of furnace part)
30 Large opening 36 First support receiving member 38 Second support receiving member 40, 42 Jack (support device)
40a, 42a Extension part (support device)
51 Common beam member 53 Common beam member

Claims (5)

火炉部と、該火炉部の上方で連結され該火炉部と並列して下方向に延在する後伝部と、を有し、支持構造物に吊り具で吊り下げられて保持されたボイラを解体するボイラ解体方法において、
前記火炉部の下端部を切り取って大開口部を設ける大開口部形成工程と、
前記火炉部内部の前記後伝部下端部の高さの近傍高さ位置に、前記大開口部の下方からの第1支持装置による該火炉部の支持を可能とする第1支持受け部材を固定設置する第1支持受け部材設置工程と、
前記後伝部の下端部に下方からの第2支持装置による該後伝部の支持を可能とする第2支持受け部材を固定設置する第2支持受け部材設置工程と、
前記設置された第1及び第2支持受け部材をそれぞれ前記第1支持装置及び前記第2支持装置により支持して、前記ボイラの全重量を支えるボイラ支持工程と、
前記吊り具による吊り下げ状態を解除する吊り下げ状態解除工程と、
前記第1及び第2支持装置による支持位置を下降させ、前記ボイラをその下端部側から切断して解体する切断解体作業を、下降可能な最低位置まで繰り返す下降解体工程と、
前記下降解体工程の終了後、前記ボイラ上部残存部を前記支持状態を維持しつつ解体するボイラ上部残存部解体工程と、
を有することを特徴とするボイラ解体方法。
A boiler unit and a rear transmission unit connected above the furnace unit and extending downward in parallel with the furnace unit; In the boiler dismantling method to dismantle,
A large opening forming step of providing a large opening by cutting off the lower end of the furnace portion;
A first support receiving member that supports the furnace portion by the first support device from below the large opening is fixed at a height position in the vicinity of the lower end of the rear transmission portion inside the furnace portion. A first support receiving member installation step to be installed;
A second support receiving member installation step of fixing and installing a second support receiving member that enables support of the rear transmission portion by a second support device from below at a lower end portion of the rear transmission portion;
A boiler support step for supporting the total weight of the boiler by supporting the installed first and second support receiving members by the first support device and the second support device, respectively;
A suspended state releasing step for releasing the suspended state by the lifting tool;
A lowering and dismantling step of lowering the support position by the first and second support devices, and repeating the cutting and dismantling work for cutting and disassembling the boiler from its lower end side to the lowest position where it can be lowered,
After completion of the descending dismantling step, the boiler upper remaining portion dismantling step of dismantling the boiler upper remaining portion while maintaining the supporting state;
A boiler dismantling method characterized by comprising:
前記第1支持受け部材と、前記第2支持受け部材は、
梁を格子状に組んで形成したことを特徴とする請求項1に記載のボイラ解体方法。
The first support receiving member and the second support receiving member are
The boiler disassembly method according to claim 1, wherein the beams are formed in a lattice pattern.
前記第1支持受け部材と、第2支持受け部材には、
それら双方に跨って伸長する共用梁部材が用いられたことを特徴とする請求項1又は2に記載のボイラ解体方法。
In the first support receiving member and the second support receiving member,
The boiler disassembly method according to claim 1 or 2, wherein a common beam member extending over both of them is used.
前記共用梁部材は、前記支持構造物まで延在し該支持構造物に固定され、
前記ボイラ支持工程では、前記ボイラだけでなく前記支持構造物を含む全重量を支持し、
前記吊り下げ状態解除工程を行わず、
前記下降解体工程の前記切断解体作業では、前記ボイラの切断作業と併せて前記支持構造物の下端部側の切断解体作業も行い、
前記ボイラ上部残存部解体工程では、前記支持構造物の上部残存部側の解体も行うことを特徴とする請求項3に記載のボイラ解体方法。
The common beam member extends to the support structure and is fixed to the support structure;
In the boiler support step, the entire weight including not only the boiler but also the support structure is supported,
Without performing the suspended state release step,
In the cutting and disassembling work of the descending dismantling process, the cutting and disassembling work on the lower end side of the support structure is performed together with the cutting work of the boiler,
The boiler dismantling method according to claim 3, wherein the dismantling step of the upper part of the boiler also disassembles the upper remaining part of the support structure.
前記火炉部の天井構造部と前記第1支持受け部材との間に棒状体を設置し、下方からの支持力に対する補強を行ったことを特徴とする請求項1〜4の何れか1項に記載のボイラ解体方法。   The rod-shaped body is installed between the ceiling structure portion of the furnace portion and the first support receiving member to reinforce the supporting force from below, according to any one of claims 1 to 4. The boiler dismantling method as described.
JP2007087777A 2006-10-04 2007-03-29 Boiler disassembly method Expired - Fee Related JP5005405B2 (en)

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EP07117671.3A EP1936267B1 (en) 2006-10-04 2007-10-01 Method for disassembling a boiler
US11/905,691 US8020297B2 (en) 2006-10-04 2007-10-03 Method for disassembling boiler

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