JPH08159402A - Boiler apparatus and method of repairing heat transfer device - Google Patents
Boiler apparatus and method of repairing heat transfer deviceInfo
- Publication number
- JPH08159402A JPH08159402A JP30671994A JP30671994A JPH08159402A JP H08159402 A JPH08159402 A JP H08159402A JP 30671994 A JP30671994 A JP 30671994A JP 30671994 A JP30671994 A JP 30671994A JP H08159402 A JPH08159402 A JP H08159402A
- Authority
- JP
- Japan
- Prior art keywords
- heat transfer
- duct
- transfer device
- panel
- repair
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はボイラ装置に関し、特に
排熱回収ボイラなどのボイラ装置におけるダクトと伝熱
器の配置構造とダクト内に設けられる伝熱器の補修方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boiler apparatus, and more particularly, to an arrangement structure of a duct and a heat exchanger in a boiler apparatus such as an exhaust heat recovery boiler and a method for repairing a heat exchanger provided in the duct.
【０００２】[0002]
【従来の技術】エネルギーの高効率化利用の一環とし
て、最近複合発電プラントが注目されている。図１３に
複合発電プラントの構成を示す。この複合発電プラント
は、まずガスタービン２６による発電を行うと共に、ガ
スタービン２６から排出された排ガス２７中の熱を排熱
回収ボイラ２８において回収し、同ボイラ２８で発生し
た高圧蒸気Ｓ１、低圧蒸気Ｓ２により蒸気タービン２９
を作動させて発電するものである。この複合発電プラン
トは、発電効率の面に加えてガスタービンの特性である
負荷応答性が高く、急激な電力需要の変動にも十分に対
応し得るという利点がある。2. Description of the Related Art Recently, a combined power generation plant has been attracting attention as a part of efficient use of energy. FIG. 13 shows the configuration of the combined cycle power plant. This combined cycle power generation plant first performs power generation by the gas turbine 26, collects heat in the exhaust gas 27 discharged from the gas turbine 26 in the exhaust heat recovery boiler 28, and generates high pressure steam S1 and low pressure steam generated in the boiler 28. Steam turbine 29 by S2
Is operated to generate electricity. This combined cycle power generation plant has an advantage that, in addition to the aspect of power generation efficiency, it has a high load responsiveness that is a characteristic of a gas turbine and can sufficiently cope with a sudden change in power demand.
【０００３】図１０はガスタービン２６（図１３）から
の排ガス２７の熱を回収する排熱回収ボイラの構成を示
す。図１０において排熱回収ボイラを構成する過熱器１
５、高圧蒸発器１６、脱硝装置１７、高圧蒸発器１８、
高圧節炭器２１、低圧蒸発器２２、低圧節炭器２５はダ
クト６内に配置される。ガスタービン２６（図１３）か
らの排ガス２７は過熱器１５、高圧蒸発器１６を経て脱
硝装置１７に至り、排ガス中の窒素酸化物（ＮＯｘ）を
除去する。続いて、排ガス２７は高圧蒸発器１８、高圧
節炭器２１、低圧蒸発器２２、低圧節炭器２５を経て排
出される。この間に発生した高圧蒸気Ｓ1および低圧蒸
気Ｓ２は蒸気タービン２９（図１３）の動力源、または
図示していない工場内熱源として利用される。図１０で
は前記の機器の他に、高圧ドラム１９、低圧ドラム２
３、高圧降水管２０および低圧降水管２４を示してい
る。FIG. 10 shows the construction of an exhaust heat recovery boiler for recovering the heat of the exhaust gas 27 from the gas turbine 26 (FIG. 13). In FIG. 10, a superheater 1 that constitutes an exhaust heat recovery boiler
5, high-pressure evaporator 16, denitration device 17, high-pressure evaporator 18,
The high pressure economizer 21, the low pressure evaporator 22, and the low pressure economizer 25 are arranged in the duct 6. Exhaust gas 27 from the gas turbine 26 (FIG. 13) reaches the denitration device 17 through the superheater 15 and the high-pressure evaporator 16 to remove nitrogen oxides (NOx) in the exhaust gas. Then, the exhaust gas 27 is discharged through the high pressure evaporator 18, the high pressure economizer 21, the low pressure evaporator 22, and the low pressure economizer 25. The high-pressure steam S1 and the low-pressure steam S2 generated during this period are used as a power source of the steam turbine 29 (FIG. 13) or a heat source in a factory (not shown). In FIG. 10, in addition to the above equipment, the high-pressure drum 19 and the low-pressure drum 2
3, a high pressure downcomer 20 and a low pressure downcomer 24 are shown.
【０００４】本明細書ではガスタービン２６の排ガス２
７の熱を回収する過熱器１５から低圧節炭器２５までの
各熱交換機器を総称して伝熱器と言い、各熱交換機器を
構成する複数の管のそれぞれを伝熱管と言う。In this specification, the exhaust gas 2 of the gas turbine 26 is used.
Each heat exchange device from the superheater 15 for recovering the heat of No. 7 to the low pressure economizer 25 is generically called a heat transfer device, and each of a plurality of tubes constituting each heat exchange device is called a heat transfer pipe.
【０００５】図１１に示すように、伝熱器はフィン付き
伝熱管１群から構成され、しかも、それらは図１２（図
９のＡ−Ａ線視図）に示すように排ガス２７の流れ方向
に対して千鳥状に高密度に配置され、効率良く熱回収で
きる構造となっている。As shown in FIG. 11, the heat exchanger is composed of a group of heat transfer tubes with fins, and they are in the flow direction of the exhaust gas 27 as shown in FIG. 12 (a line AA in FIG. 9). On the other hand, they are arranged in a zigzag pattern at a high density and have a structure that enables efficient heat recovery.
【０００６】図９は排熱回収ボイラを構成している各機
器のうち過熱器が配置された部分を示すものであり、ダ
クト６の側面から見た図である。図９は図１０の一点鎖
線で囲われたＤ部分の詳細図を示す。また、図７は従来
の伝熱管を補修方法を示したものであるが、ダクト６の
横断面から見た図である。FIG. 9 shows a portion of each device constituting the exhaust heat recovery boiler in which the superheater is arranged, and is a view seen from the side surface of the duct 6. FIG. 9 shows a detailed view of the portion D surrounded by the alternate long and short dash line in FIG. Further, FIG. 7 shows a conventional heat transfer tube repairing method, which is seen from a cross section of the duct 6.
【０００７】図９に示す複数本のフィン付き伝熱管１は
上部管寄せ２と下部管寄せ４との間に配置され、工場ま
たは現地において一体化されてパネル化されている（以
下、一体化されたフィン付き伝熱管１のことを伝熱器パ
ネルと呼ぶことがある。）。また上部管寄せ２にはサポ
ート３が取り付けられており、フィン付き伝熱管１がサ
ポート３を介してダクト６に吊り下げられている。下部
管寄せ４にはラグ９が取り付けられており、ラグ９はダ
クト６に取り付けられた振れ止め５の間に隙間を持って
挟まれて配置されている。A plurality of heat transfer tubes with fins 1 shown in FIG. 9 are arranged between an upper header 2 and a lower header 4, and are integrated into a panel in a factory or on-site (hereinafter, integrated. The finned heat transfer tube 1 may be referred to as a heat transfer panel.). A support 3 is attached to the upper header 2, and the finned heat transfer tube 1 is suspended from the duct 6 via the support 3. A lug 9 is attached to the lower header 4, and the lug 9 is arranged with a gap between the steady rests 5 attached to the duct 6.
【０００８】地震力などの水平方向にかかる荷重に対し
ては、下部管寄せ４に取り付けられたラグ９が振れ止め
５を介してダクト６にフィン付き伝熱管１の荷重を伝達
する構造になっている。排ガス２７の伝熱によるフィン
付き伝熱管１の熱膨張に対しては、下部管寄せ４に取り
付けられたラグ９が拘束されないようにダクト６に取り
付けられた振れ止め５が、ラグ９との間に隙間を有する
ように挟み込まれたスライド構造になっている。With respect to a horizontal load such as seismic force, a lug 9 attached to the lower header 4 transmits the load of the finned heat transfer tube 1 to the duct 6 via the steady rest 5. ing. With respect to the thermal expansion of the finned heat transfer tube 1 due to the heat transfer of the exhaust gas 27, the steady rest 5 attached to the duct 6 is provided between the lug 9 so that the lug 9 attached to the lower header 4 is not restrained. It has a sliding structure that is sandwiched so that there is a gap in the.
【０００９】また、排ガス２７の偏流を防止するため
に、ダクト６にはガスパス防止板１０が上部管寄せ２及
び下部管寄せ４の周囲に取り付けられている。さらにフ
ィン付き伝熱管１には、各フィン付き伝熱管１の間隔を
固定するための支持板７が数箇所取り付けられている。In order to prevent the non-uniform flow of the exhaust gas 27, a gas path prevention plate 10 is attached to the duct 6 around the upper header 2 and the lower header 4. Further, the finned heat transfer tube 1 is provided with several support plates 7 for fixing the intervals between the finned heat transfer tubes 1.
【００１０】図６に上部管寄せ２又は下部管寄せ４とフ
ィン付き伝熱管１の接合部の一例の拡大図を示す。図９
に示す上部管寄せ２と下部管寄せ４とフィン付き伝熱管
１との一体化、すなわち該フィン付き伝熱管１のパネル
化においては、フィン付き伝熱管１の両端部となる曲管
部１ａを製作したものを、まず溶接部ｂで上部管寄せ２
及び下部管寄せ４にそれぞれ溶接により接合し、次に上
部管寄せ２及び下部管寄せ４に接合された曲管部１ａと
フィン付き伝熱管１の直管部１ｂとを溶接部ａで接合す
る。この他に、直管部１ｂとその両端の曲管部１ａを一
体物として製作したフィン付き伝熱管１を、上部管寄せ
２及び下部管寄せ４にそれぞれ溶接により溶接部ｂのみ
で接合する場合がある。FIG. 6 shows an enlarged view of an example of a joint between the upper header 2 or the lower header 4 and the finned heat transfer tube 1. Figure 9
In order to integrate the upper header 2, the lower header 4, and the heat transfer tube 1 with fins, that is, in forming the finned heat transfer tube 1 into a panel, the curved tube portions 1a that are both ends of the finned heat transfer tube 1 are formed. First of all, the welded part b is made up of the manufactured product
And the lower pipe header 4 are welded to each other, and then the bent pipe portion 1a joined to the upper pipe header 2 and the lower pipe header 4 and the straight pipe portion 1b of the finned heat transfer tube 1 are joined at the welded portion a. . In addition to this, when the finned heat transfer tube 1 manufactured by integrally forming the straight pipe portion 1b and the curved pipe portions 1a at both ends thereof is joined to the upper header 2 and the lower header 4 by welding only at the welded portion b, respectively. There is.
【００１１】長期間、排熱回収ボイラを運転している
と、図６に示す溶接部ａ、ｂに発生する熱応力により、
この溶接部ａ、ｂに亀裂が入り、フィン付き伝熱管１内
の流体が溶接部ａ、ｂよりリークすることがある。この
リークした溶接部ａ、ｂは補修作業員により補修され
る。前記補修作業はダクト６内で補修作業を行う場合で
あって、図９に示す伝熱器パネルＡ、Ｂ、Ｃの内、隣接
する機器（図示せず）に面した伝熱器パネルＡ、Ｃの場
合には、伝熱器パネルＡ、Ｃとダクト６との間には補修
するのに十分な空間部があるため、図９の空間I、ＩＩ
部分から補修作業員が容易に伝熱器パネルＡ、Ｃに寄り
付くことができ、ガスパス防止板１０を撤去するだけ
で、ダクト６内で比較的容易に補修作業を行うことがで
きる。しかし、図８に示す伝熱器パネルＢのフィン付き
伝熱管１ｘのように、補修すべきものが伝熱器パネル
Ａ、Ｃの間にある場合には、伝熱器パネルＢとダクト６
との間には補修用の空間がないため、補修作業員が容易
に寄り付けない。そのため、ガスパス防止板１０（図
９）を撤去し、さらにダクト６を切断することで補修作
業に必要な空間部を確保し、さらに伝熱器パネルＡまた
はＣのフィン付き伝熱管１（図８の×印の付いたフィン
付き伝熱管１）を数十本取除いた後で補修が行われる。
このための作業に従来は約３〜５週間を要していた。When the exhaust heat recovery boiler is operated for a long period of time, due to the thermal stress generated in the welded portions a and b shown in FIG.
The welds a and b may crack and the fluid in the finned heat transfer tube 1 may leak from the welds a and b. The leaked welds a and b are repaired by a repair worker. The repair work is a case where the repair work is performed in the duct 6, and the heat transfer panel A facing the adjacent device (not shown) among the heat transfer panels A, B, and C shown in FIG. In the case of C, since there is a sufficient space between the heat transfer panels A and C and the duct 6 for repair, the spaces I and II in FIG.
A repair worker can easily approach the heat transfer panels A and C from the portion, and the repair work can be relatively easily performed in the duct 6 only by removing the gas path prevention plate 10. However, like the finned heat transfer tube 1x of the heat transfer panel B shown in FIG. 8, when the object to be repaired is between the heat transfer panels A and C, the heat transfer panel B and the duct 6
Since there is no space for repairs between and, repair workers cannot easily approach. Therefore, the gas path prevention plate 10 (FIG. 9) is removed, and the duct 6 is further cut to secure a space necessary for repair work, and further, the heat transfer tube 1 with fins of the heat transfer panel A or C (FIG. 8). After removing dozens of heat transfer tubes with fins marked with x, 1), repair is performed.
The work for this has conventionally required about 3 to 5 weeks.
【００１２】また、前記補修作業をダクト６外で行う場
合には、図７に示すようにダクト６の天井ケーシング１
１および側面ケーシング１２を撤去し、ワイヤーロープ
１４を上部管寄せ２の吊りラグ（図示せず）に取り付
け、さらにサポート３（図９）を切断した後、ワイヤー
ロープ１４を介して図示していないクレーンにより伝熱
器パネルＢをダクト６内から吊り出し、補修作業用に製
作した仮設架台に仮置きした後に行われていた。Further, when the repair work is performed outside the duct 6, as shown in FIG.
1 and the side casing 12 are removed, the wire rope 14 is attached to the hanging lug (not shown) of the upper header 2, and the support 3 (FIG. 9) is further cut, and then not shown via the wire rope 14. This was done after the heat transfer panel B was hung from the duct 6 by a crane and temporarily placed on a temporary stand manufactured for repair work.
【００１３】[0013]
【発明が解決しようとする課題】上述したように、従来
の伝熱器の補修方法において、ダクト６内で伝熱器の補
修作業を行う場合には、ダクト６を切断しなければ補修
作業に必要な作業空間を確保できず、補修する必要の無
い健全な伝熱器パネル部分のフィン付き伝熱管１までも
数十本切断しなければならなかった。さらに復旧におい
ても多大の作業量が必要であった。また、ダクト６外で
伝熱器の補修作業を行う従来の方法においては、ダクト
６の天井ケーシング１１、側面ケーシング１２及び伝熱
器パネルサポート３を切断し、伝熱器パネルをダクト６
内から運びだすなど多大の作業量が必要であった。ま
た、補修後の伝熱器パネルのダクト６内への取込み、復
旧においても多大の作業量が必要であった。すなわち、
従来の伝熱器パネル補修方法においては補修期間が非常
に長くなるという問題があった。As described above, in the conventional heat exchanger repair method, when the heat exchanger repair work is performed in the duct 6, the repair work must be performed unless the duct 6 is cut. It was not possible to secure the necessary work space, and it was necessary to cut dozens of heat transfer tubes with fins 1 of a sound heat transfer panel part that did not need repair. Furthermore, a great deal of work was required for restoration. Further, in the conventional method of repairing the heat transfer device outside the duct 6, the ceiling casing 11, the side surface casing 12 and the heat transfer device panel support 3 of the duct 6 are cut, and the heat transfer device panel is attached to the duct 6.
It required a great deal of work such as carrying it out from within. Further, a large amount of work is required also for taking the heat transfer panel after repair into the duct 6 and restoring it. That is,
The conventional heat transfer panel repair method has a problem that the repair period becomes very long.
【００１４】本発明の目的は健全な伝熱器パネルの伝熱
管を損傷することなく、伝熱器パネルの補修をダクト内
で容易に、しかも短期間で行なえるボイラ装置を提供す
ることである。また、本発明の目的は健全な伝熱器パネ
ルの伝熱管を損傷することなく、伝熱器パネルをダクト
内で移動して補修が行なえ、ダクトの外に移動する必要
がないため、伝熱器の補修期間を大幅に短縮できる伝熱
器の補修方法を提供することにある。An object of the present invention is to provide a boiler device which can easily repair a heat transfer panel in a duct without damaging a heat transfer tube of a sound transfer panel and in a short period of time. . Further, the object of the present invention is to move the heat transfer panel within the duct for repair without damaging the heat transfer tube of the sound heat transfer panel, and it is not necessary to move the heat transfer panel out of the duct. It is to provide a method for repairing a heat transfer device that can significantly shorten the repair period for the heat exchanger.
【００１５】[0015]
【課題を解決するための手段】本発明の上記目的は次の
構成によって達成される。本発明は、排ガスが流れるダ
クト内に伝熱器を配設した排熱回収ボイラなどのボイラ
装置において、伝熱器を構成する複数の伝熱器パネルの
中の一部をダクト壁面方向に移動させたときに前記ダク
ト内に移動した伝熱器パネル内の伝熱管の溶接部を確認
できる補修用空間部が生じるように伝熱器をダクト内に
配置したボイラ装置、または排ガスが流れるダクト内に
伝熱器を配設した排熱回収ボイラなどのボイラ装置にお
ける伝熱器補修方法において、伝熱器を構成する複数の
伝熱器パネルの中の一部をダクト壁面方向に移動させ
て、前記ダクト内に前記伝熱管の溶接部を確認できる補
修用空間部を生じさせる伝熱器補修方法である。The above objects of the present invention can be achieved by the following constitutions. The present invention, in a boiler device such as an exhaust heat recovery boiler in which a heat transfer device is arranged in a duct through which exhaust gas flows, moves a part of a plurality of heat transfer device panels forming a heat transfer device in a duct wall surface direction. The boiler device in which the heat transfer device is arranged in the duct so that a repair space where the welded part of the heat transfer tube in the heat transfer panel that has moved into the duct can be confirmed when caused, or in the duct through which the exhaust gas flows In a heat exchanger repair method in a boiler device such as an exhaust heat recovery boiler in which a heat exchanger is disposed in, by moving a part of a plurality of heat exchanger panels forming the heat exchanger in the duct wall surface direction, It is a heat transfer device repairing method for producing a repair space in which the welded portion of the heat transfer tube can be confirmed in the duct.
【００１６】本発明のボイラ装置では、伝熱器補修時の
伝熱管吊り装置または吊り装置用治具をダクト内に常設
しておくことが望ましい。また、伝熱器パネルのダクト
壁面方向への移動の具体例としては伝熱器パネルの中の
一部をダクト内で上部または下部のダクトケーシング方
向に上下にまたは傾斜を伴って移動させることであり、
こうして、伝熱管の溶接部を確認できる補修用空間部を
ダクト内部に生じさせる。In the boiler apparatus of the present invention, it is desirable that a heat transfer tube suspending device or a suspending device jig for repairing the heat transfer device is permanently installed in the duct. Further, as a specific example of the movement of the heat transfer panel in the duct wall surface direction, by moving a part of the heat transfer panel in the duct toward the upper or lower duct casing vertically or with an inclination. Yes,
In this way, a repair space where the welded portion of the heat transfer tube can be confirmed is created inside the duct.
【００１７】[0017]
【作用】本発明によれば、排ガスが流れるダクト内に伝
熱器パネルを配設した排熱回収ボイラなどのボイラ装置
におけるダクト内の伝熱器を補修する場合に、補修対象
伝熱器パネルをダクト壁面方向に、より具体的には上部
または下部ケーシングの方向に上下にまたは傾斜を伴っ
て移動させることで、前記ダクト内に前記伝熱管の溶接
部を確認できる空間部を生じさせることができる。例え
ば補修対象の伝熱器パネルを隣接する伝熱器パネルの上
部または下部方向に移動することによって伝熱器パネル
内の伝熱管の溶接部の補修が可能な作業空間が生じるた
め、健全な伝熱器パネルの伝熱管及びダクトの天井、側
面ケーシングの切断、復旧などの作業が不要となり、ダ
クト内での補修作業が可能となるため、伝熱器パネル補
修のためのプラント停止期間が大幅に短縮できる。According to the present invention, when repairing a heat exchanger in a duct in a boiler device such as an exhaust heat recovery boiler in which a heat exchanger panel is arranged in a duct through which exhaust gas flows, the heat exchanger panel to be repaired is repaired. In the duct wall surface direction, more specifically in the direction of the upper or lower casing up or down, or with an inclination, it is possible to create a space in the duct where the welded portion of the heat transfer tube can be confirmed. it can. For example, by moving the heat transfer panel to be repaired to the upper or lower direction of the adjacent heat transfer panel, a work space where the welded part of the heat transfer tube in the heat transfer panel can be repaired is created. There is no need to cut and restore the heat transfer pipes and duct ceilings and side casings of the heat exchanger panel, and repair work can be performed inside the duct, greatly reducing the plant downtime for repairing the heat exchanger panel. Can be shortened.
【００１８】[0018]
【実施例】以下に本発明の一実施例を挙げ、図面を用い
てさらに詳細に説明する。図１は、本実施例の排熱回収
ボイラの排ガスダクト６内に配置される伝熱器パネルを
示したものであり、伝熱器パネルＢとダクト６との間に
フィン付き伝熱管１の溶接部を確認できる空間部が生じ
るように伝熱器パネルＢとダクト６を配置した構造であ
る。図９に示すサポート３、振れ止め５、支持板７、ラ
グ９、ガスパス防止板１０の記載は省略している。図１
において、伝熱器パネルＢの各フィン付き伝熱管１には
伝熱管同士の溶接部ａ1、ａ2と上部管寄せ２とフィン付
き伝熱管１との溶接部ｂ1、下部管寄せ４とフィン付き
伝熱管１との溶接部ｂ2とがある。また、ダクト６の天
井ケーシング１１と上部管寄せ２の上端の間の空間高さ
Ｌ1と上部管寄せ２の上端からフィン付き伝熱管１の溶
接部までの距離ｍ1、同様に下部管寄せ４の下端と底部
ケーシング１３の間の空間高さＬ2と下部管寄せ４の下
端からフィン付き伝熱管１の溶接部までの距離ｍ2との
間には次のような関係が成立するように配置する。 Ｌ1＞ｍ1 Ｌ2＞ｍ2 上部管寄せ２上部の空間高さＬ1は１．５ｍ程度以上と
し、下部管寄せ４下部の空間高さＬ2は１．０ｍ程度以
上とするが、これらの高さＬ1、Ｌ2は補修作業員が補修
するのに必要な空間高さである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in more detail with reference to the drawings. FIG. 1 shows a heat transfer panel arranged in an exhaust gas duct 6 of an exhaust heat recovery boiler of the present embodiment, in which a finned heat transfer tube 1 is provided between a heat transfer panel B and a duct 6. This is a structure in which the heat transfer panel B and the duct 6 are arranged so that a space where the welded portion can be confirmed is generated. The support 3, the steady rest 5, the support plate 7, the lug 9, and the gas path prevention plate 10 shown in FIG. 9 are omitted. FIG.
In each of the finned heat transfer tubes 1 of the heat transfer panel B, the welded portions a 1 and a 2 of the heat transfer tubes, the upper welded portion 2 and the finned heat transfer tube 1 are welded b 1 and the lower welded portion 4 are joined. There is a weld b 2 with the finned heat transfer tube 1. Further, the space height L 1 between the ceiling casing 11 of the duct 6 and the upper end of the upper header 2 and the distance m 1 from the upper end of the upper header 2 to the welded portion of the finned heat transfer tube 1 , similarly the lower header The following relationship may be established between the space height L 2 between the lower end of 4 and the bottom casing 13 and the distance m 2 from the lower end of the lower header 4 to the weld of the finned heat transfer tube 1. To place. L 1 > m 1 L 2 > m 2 The upper space 2 has a space height L 1 of about 1.5 m or more, and the lower space 4 4 has a space height L 2 of about 1.0 m or more. These heights L 1 and L 2 are the space heights required for repair by a repair worker.
【００１９】実施例１ 本実施例を図１〜図３を用いて説明する。本実施例は伝
熱器パネルＡ〜Ｃの天井ケーシング１１へ吊り方式でサ
ポートするものである。図２（ａ）〜（ｄ）に示すよう
に、本実施例は隣接する伝熱器パネルＡ、Ｃの間に配置
されている伝熱器パネルＢの上部溶接部ａ1、ｂ1を補修
する場合には、伝熱器パネルＢを鉛直方向上方または鉛
直方向に対して斜め上方に引き上げ、上部スペースＬ1
で補修作業するか、または図２（ｂ）に示すように、伝
熱器パネルＢに隣接する伝熱器パネルＡ、Ｃを鉛直方向
下方または鉛直方向に対して斜め下方に降ろし、伝熱器
パネルＢの上部溶接部ａ1、ｂ1を作業しやすい空間をダ
クト６上部に作り補修作業を行う。また、伝熱器パネル
Ｂの下部溶接部ａ2、ｂ2を補修する場合には、図２
（ｃ）に示すように伝熱器パネルＢを鉛直方向下方また
は鉛直方向に対して斜め下方に降ろし、下部スペースＬ
2で溶接部ａ2、ｂ2の補修作業するものである。もちろ
ん、図示していないが、伝熱器パネルＢに隣接する伝熱
器パネルＡ、Ｃを鉛直方向上方または鉛直方向に対して
斜め上方に引き上げて伝熱器パネルＢの下部溶接部
ａ2、ｂ2を補修することもできる。また、図２（ｄ）に
は上部管寄せ２が無く下部管寄せ４のみの伝熱器パネル
を示すが、この場合においても溶接部を補修する場合に
は鉛直方向上、下方または鉛直方向に対して斜め上、下
方に移動させるものである。Example 1 This example will be described with reference to FIGS. In this embodiment, the ceiling casings 11 of the heat transfer panels A to C are supported by a suspension method. As shown in FIGS. 2A to 2D, in this embodiment, the upper welded portions a 1 and b 1 of the heat transfer panel B arranged between the adjacent heat transfer panels A and C are repaired. In this case, the heat transfer panel B is pulled upward in the vertical direction or diagonally upward with respect to the vertical direction, and the upper space L 1
2), or as shown in FIG. 2B, the heat transfer panels A and C adjacent to the heat transfer panel B are lowered vertically or obliquely downward with respect to the vertical direction. The upper welded portions a 1 and b 1 of the panel B are provided with a space in the upper portion of the duct 6 where it is easy to work and repair work is performed. When repairing the lower welded parts a 2 and b 2 of the heat transfer panel B, as shown in FIG.
As shown in (c), the heat transfer panel B is lowered vertically or obliquely downward with respect to the vertical direction, and the lower space L
The welding work a 2 and b 2 is performed at 2 . Of course, although not shown, the heat transfer panels A and C adjacent to the heat transfer panel B are pulled vertically upward or obliquely upward with respect to the vertical direction to lower the welded part a 2 of the heat transfer panel B, It is also possible to repair b 2 . Further, FIG. 2 (d) shows a heat transfer panel having only the lower header 4 without the upper header 2, but in this case as well, when repairing the welded portion, it is required to move vertically upward, downward, or vertically. On the other hand, it is moved diagonally upward and downward.
【００２０】図３には本実施例の伝熱器パネルＢが溶接
された上部管寄せ２の天井ケーシング１１への吊りサポ
ート装置部分を示す。天井ケーシング１１は受け梁２７
で補強されていて、さらに排ガス流路側には保温材２８
が内張りされている。そして天井ケーシング１１と上部
管寄せ２との間には例えばねじ方式の吊りサポート装置
２９が設けられている。吊りサポート装置２９のねじ３
０を回転させて伝熱器パネルＢを上げ降ろしをすること
ができ、各フィン付き伝熱管１の溶接部ａ1、ｂ1及びａ
2、ｂ2の補修が可能になる。FIG. 3 shows a portion of a support device for suspending the upper header 2 to which the heat transfer panel B of this embodiment is welded from the ceiling casing 11 to the ceiling casing 11. The ceiling casing 11 is a receiving beam 27
It is reinforced with a heat insulating material 28 on the exhaust gas flow path side.
Is lined. A screw type suspension support device 29 is provided between the ceiling casing 11 and the upper header 2. Screw 3 of the suspension support device 29
The heat transfer panel B can be raised and lowered by rotating 0, and the welded parts a 1 , b 1 and a of each finned heat transfer tube 1 can be rotated.
2 and b 2 can be repaired.
【００２１】本実施例は吊りサポート装置２９を伝熱器
パネルＢの天井ケーシング１１へのサポート装置として
だけでなく、補修時の吊り上げ降ろし装置と兼用できる
ものである。In this embodiment, the lifting support device 29 can be used not only as a support device for the ceiling casing 11 of the heat transfer panel B, but also as a lifting and lowering device for repair.
【００２２】実施例２ 図４〜図５は本発明の他の実施例を示すものである。図
４（ａ）に示すように、本実施例は伝熱器パネルＡ〜Ｃ
をダクト６の底部ケーシング１３でサポートする場合が
あるが、この場合、各伝熱器パネルＡ〜Ｃにそれぞれ吊
り上げ降ろし装置３１を常設としておくものである。図
５に上部管寄せ２が溶接された伝熱器パネルＢの天井ケ
ーシング１１への吊り上げ降ろし装置３１部分を示す。
天井ケーシング１１は受け梁２７で補強されていて、さ
らに排ガス流路側には保温材２８が内張りされている。
そして天井ケーシング１１と上部管寄せ２との間にはチ
ェーンブロック方式の吊り上げ降ろし装置３１が設けら
れている。吊り上げ降し装置３１のチェーンブロック３
２の長さを調節することで伝熱器パネルＢの上げ降ろし
をすることができ、各フィン付き伝熱管１の溶接部
ａ1、ｂ1及びａ2、ｂ2の補修が可能になる。Embodiment 2 FIGS. 4 to 5 show another embodiment of the present invention. As shown in FIG. 4 (a), this embodiment has heat transfer panels A to C.
May be supported by the bottom casing 13 of the duct 6, but in this case, the hoisting and lowering device 31 is permanently installed on each of the heat transfer panels A to C. FIG. 5 shows a hoisting and lowering device 31 portion of the heat transfer panel B to which the upper header 2 is welded to the ceiling casing 11.
The ceiling casing 11 is reinforced by a receiving beam 27, and a heat insulating material 28 is lined inside the exhaust gas passage side.
A chain block type hoisting and lowering device 31 is provided between the ceiling casing 11 and the upper header 2. Chain block 3 of lifting and lowering device 31
By adjusting the length of 2, the heat transfer panel B can be raised and lowered, and the welded parts a 1 , b 1 and a 2 , b 2 of the finned heat transfer tube 1 can be repaired.
【００２３】上記本発明の各実施例によれば、健全な伝
熱管の切断・復旧や天井、側面ケーシングの切断・復旧
などをする必要がなくなり、プラント設備停止期間を約
１週間に短縮することができた。According to each of the embodiments of the present invention described above, it is not necessary to cut and restore sound heat transfer tubes or cut and restore the ceiling and side casings soundly, and shorten the plant equipment stoppage period to about one week. I was able to.
【００２４】[0024]
【発明の効果】本発明によれば、ダクトサイズは従来よ
り多少大きくなるものの、健全な伝熱管の切断・復旧や
天井、側面ケーシングの切断・復旧などの作業が不要と
なり、伝熱管補修のためのプラント設備停止期間が大幅
（約１／３〜１／５）に短縮できる。EFFECTS OF THE INVENTION According to the present invention, although the duct size is slightly larger than before, it is not necessary to perform operations such as cutting / restoring sound heat transfer tubes and cutting / restoring the ceiling and side casings, which is necessary for repairing the heat transfer tubes. The plant equipment down period can be greatly shortened (about 1/3 to 1/5).
【図１】 本発明の実施例を示す図。FIG. 1 is a diagram showing an embodiment of the present invention.
【図２】 本発明の実施例１の伝熱器パネルの溶接部な
どの補修要領を示す図。FIG. 2 is a diagram showing a procedure for repairing a welded portion of the heat transfer panel according to the first embodiment of the present invention.
【図３】 本発明の実施例１の伝熱器パネルが溶接され
た上部管寄せの天井ケーシングへの吊りサポート装置部
分を示す図。FIG. 3 is a view showing a portion of a suspension support device portion of the upper header of the heat transfer panel of the first embodiment of the present invention, which is welded to the ceiling casing.
【図４】 本発明の実施例２の伝熱器パネルの溶接部な
どの補修要領を示す図。FIG. 4 is a diagram showing a procedure for repairing a welded portion of a heat transfer panel according to a second embodiment of the present invention.
【図５】 本発明の実施例２の伝熱器パネルの吊り上げ
降ろし装置部分を示す図。FIG. 5 is a diagram showing a hoisting and lowering device portion of a heat transfer panel according to a second embodiment of the present invention.
【図６】 伝熱器パネルの管寄せと伝熱管の接合部の拡
大図。FIG. 6 is an enlarged view of a joint portion of a heat transfer panel and a heat transfer panel.
【図７】 伝熱器パネルの従来の補修要領を示す図。FIG. 7 is a diagram showing a conventional repair procedure for a heat transfer panel.
【図８】 伝熱器パネルの従来の補修要領を示す図。FIG. 8 is a diagram showing a conventional repair procedure for a heat transfer panel.
【図９】 図１０のＤ部の拡大図。9 is an enlarged view of part D in FIG.
【図１０】 排熱回収ボイラの構成を示す模式図。FIG. 10 is a schematic diagram showing a configuration of an exhaust heat recovery boiler.
【図１１】 伝熱器パネルを構成するフィン付き伝熱管
群を示す図。FIG. 11 is a view showing a heat transfer tube group with fins which constitutes a heat transfer panel.
【図１２】 排ガスの流れ方向に対して千鳥状に高密度
に配置された伝熱管群を示す図（図９のＡ−Ａ線視
図）。FIG. 12 is a view showing a heat transfer tube group arranged in a zigzag manner in a high density in the exhaust gas flow direction (a line AA view in FIG. 9).
【図１３】 複合発電プラントの構成を示す図。FIG. 13 is a diagram showing a configuration of a combined cycle power plant.
１…フィン付伝熱管、２…上部管寄せ、４…下部管寄
せ、６…ダクト、１１…天井ケーシング、１３…底部ケ
ーシング、２９…吊りサポート装置、３１…吊り上げ降
し装置、Ａ〜Ｃ…伝熱器パネル、ａ、ｂ…溶接部DESCRIPTION OF SYMBOLS 1 ... Heat transfer tube with fins, 2 ... Top fitting, 4 ... Lower fitting, 6 ... Duct, 11 ... Ceiling casing, 13 ... Bottom casing, 29 ... Lifting support device, 31 ... Lifting / lowering device, AC ... Heat transfer panel, a, b ... Welded part
Claims (4)
した排熱回収ボイラなどのボイラ装置において、伝熱器
を構成する複数の伝熱器パネルの中の一部をダクト壁面
方向に移動させたときに前記ダクト内に移動した伝熱器
パネル内の伝熱管の溶接部を確認できる補修用空間部が
生じるように伝熱器をダクト内に配置したことを特徴と
するボイラ装置。1. In a boiler device such as an exhaust heat recovery boiler in which a heat exchanger is arranged in a duct through which exhaust gas flows, a part of a plurality of heat exchanger panels constituting the heat exchanger is arranged in a duct wall surface direction. A boiler device, wherein the heat transfer device is arranged in the duct so that a repair space is formed in which the welded part of the heat transfer tube in the heat transfer device panel moved in the duct can be confirmed when the heat transfer device is moved.
り装置用治具をダクト内に常設したことを特徴とする請
求項１記載のボイラ装置。2. The boiler device according to claim 1, wherein a heat transfer tube suspension device or a suspension device jig for repairing the heat transfer device is permanently installed in the duct.
した排熱回収ボイラなどのボイラ装置における伝熱器補
修方法において、伝熱器を構成する複数の伝熱器パネル
の中の一部をダクト壁面方向に移動させて、前記ダクト
内に前記伝熱管の溶接部を確認できる補修用空間部を生
じさせることを特徴とする伝熱器補修方法。3. A heat exchanger repairing method in a boiler device such as an exhaust heat recovery boiler in which a heat exchanger is arranged in a duct through which exhaust gas flows, which is one of a plurality of heat exchanger panels constituting the heat exchanger. A heat exchanger repair method, characterized in that a repair space is formed in the duct in which the welded part of the heat transfer tube can be confirmed by moving the part toward the wall surface of the duct.
部または下部のダクトケーシング方向に上下にまたは傾
斜を伴って移動させることで伝熱管の溶接部を確認でき
る補修用空間部を生じさせることを特徴とする請求項３
記載の伝熱器補修方法。4. A repair space part in which a welded part of a heat transfer tube can be confirmed by moving a part of a heat transfer panel in a duct in an upper or lower direction toward a duct casing up or down or with an inclination. 4. The method according to claim 3, wherein
Heat transfer repair method described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30671994A JPH08159402A (en) | 1994-12-09 | 1994-12-09 | Boiler apparatus and method of repairing heat transfer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30671994A JPH08159402A (en) | 1994-12-09 | 1994-12-09 | Boiler apparatus and method of repairing heat transfer device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08159402A true JPH08159402A (en) | 1996-06-21 |
Family
ID=17960480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30671994A Pending JPH08159402A (en) | 1994-12-09 | 1994-12-09 | Boiler apparatus and method of repairing heat transfer device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08159402A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100362917B1 (en) * | 1998-10-21 | 2003-04-18 | 두산중공업 주식회사 | Waste heat boiler finite tube for combined power generation |
| JP2011002115A (en) * | 2009-06-16 | 2011-01-06 | Chugoku Electric Power Co Inc:The | Method of repairing pipe of heat exchanger |
| JP2011002114A (en) * | 2009-06-16 | 2011-01-06 | Chugoku Electric Power Co Inc:The | Method of repairing pipe of heat exchanger |
| US20110139426A1 (en) * | 2009-03-18 | 2011-06-16 | Mitsubishi Heavy Industries, Ltd. | Heat exchanger |
| JP2016205806A (en) * | 2015-04-17 | 2016-12-08 | ゼネラル エレクトリック テクノロジー ゲゼルシャフト ミット ベシュレンクテル ハフツングＧｅｎｅｒａｌ Ｅｌｅｃｔｒｉｃ Ｔｅｃｈｎｏｌｏｇｙ ＧｍｂＨ | Collar supported pressure part for heat recovery steam generator |
| JP2017166792A (en) * | 2016-03-18 | 2017-09-21 | 大阪瓦斯株式会社 | Method of repairing exhaust heat recovery boiler |
| CN111795588A (en) * | 2019-04-05 | 2020-10-20 | 株式会社神户制钢所 | Gasification device and maintenance method for gasification device |
-
1994
- 1994-12-09 JP JP30671994A patent/JPH08159402A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100362917B1 (en) * | 1998-10-21 | 2003-04-18 | 두산중공업 주식회사 | Waste heat boiler finite tube for combined power generation |
| US20110139426A1 (en) * | 2009-03-18 | 2011-06-16 | Mitsubishi Heavy Industries, Ltd. | Heat exchanger |
| US9400102B2 (en) * | 2009-03-18 | 2016-07-26 | Mitsubishi Hitachi Power Systems, Ltd. | Heat exchanger including flow regulating plates |
| JP2011002115A (en) * | 2009-06-16 | 2011-01-06 | Chugoku Electric Power Co Inc:The | Method of repairing pipe of heat exchanger |
| JP2011002114A (en) * | 2009-06-16 | 2011-01-06 | Chugoku Electric Power Co Inc:The | Method of repairing pipe of heat exchanger |
| JP2016205806A (en) * | 2015-04-17 | 2016-12-08 | ゼネラル エレクトリック テクノロジー ゲゼルシャフト ミット ベシュレンクテル ハフツングＧｅｎｅｒａｌ Ｅｌｅｃｔｒｉｃ Ｔｅｃｈｎｏｌｏｇｙ ＧｍｂＨ | Collar supported pressure part for heat recovery steam generator |
| JP2017166792A (en) * | 2016-03-18 | 2017-09-21 | 大阪瓦斯株式会社 | Method of repairing exhaust heat recovery boiler |
| CN111795588A (en) * | 2019-04-05 | 2020-10-20 | 株式会社神户制钢所 | Gasification device and maintenance method for gasification device |
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