JP2525783B2 - Boiler equipment - Google Patents
Boiler equipmentInfo
- Publication number
- JP2525783B2 JP2525783B2 JP61228105A JP22810586A JP2525783B2 JP 2525783 B2 JP2525783 B2 JP 2525783B2 JP 61228105 A JP61228105 A JP 61228105A JP 22810586 A JP22810586 A JP 22810586A JP 2525783 B2 JP2525783 B2 JP 2525783B2
- Authority
- JP
- Japan
- Prior art keywords
- side wall
- wall
- heat transfer
- rear heat
- sub
- 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.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はボイラ炉壁コーナ部の取合構造に係り、特に
コーナ部に及ぼす温度差による熱応力を低減するに好適
なボイラ炉壁コーナ部の取合構造に関する。TECHNICAL FIELD The present invention relates to a joint structure of a boiler furnace wall corner portion, and particularly to a boiler furnace wall corner portion suitable for reducing thermal stress due to a temperature difference exerted on the corner portion. Regarding the joint structure of.
火力発電等にあっては、熱源のエネルギーをボイラに
導入し、ボイラ側壁に設けられた伝熱管によって熱交換
を行ない、得られた蒸気によってタービンを駆動するシ
ステムが用いられている。In thermal power generation and the like, a system is used in which energy from a heat source is introduced into a boiler, heat is exchanged by a heat transfer tube provided on a side wall of the boiler, and the resulting steam drives a turbine.
一般にボイラ壁は管とバーを連続溶接したメンブレン
壁で形成されており、火炉壁と後部伝熱壁の取合部はメ
ンブレン壁相互の複雑な三次元構造がとられている。Generally, the boiler wall is formed by a membrane wall in which pipes and bars are continuously welded, and the joint portion of the furnace wall and the rear heat transfer wall has a complicated three-dimensional structure with the membrane walls.
即ち、第4図に示すように、熱源が供給される火炉1
の出側に副側壁2が連結され、更に、該側壁2に隣接し
て後部伝熱壁3を連結してボイラは構成されている。ボ
イラ壁は水または蒸気が通流する管とバーを連続的に溶
接したメンブレン壁で構成されている。That is, as shown in FIG. 4, the furnace 1 to which the heat source is supplied
A sub-side wall 2 is connected to the outlet side of the above, and a rear heat transfer wall 3 is connected adjacent to the side wall 2 to form a boiler. The boiler wall is composed of a membrane wall in which a pipe through which water or steam flows and a bar are continuously welded.
また、副側壁2の後部伝熱壁3の取合部は、副側壁底
壁4,副側壁側壁5,後部伝熱壁前壁6及び後部伝熱壁側壁
7で構成され、取合コーナ8を形成する。取合部8は、
相互に溶接接合されて炉内ガスをシールする構造がとら
れている。本構造では取合コーナ8において、上記の各
壁は一点で交叉することになる。一方管内流体は、火炉
1を上昇し、前及び側壁部は天井壁に入り、後壁部は副
側壁底壁4から副側壁側壁5を上昇し、天井流体と共に
セパレータ15に流入する。セパレータ15で蒸気と水が分
離され、分離された蒸気のみが後部伝熱壁3の周壁に配
設された管に供給される。Further, the joint portion of the rear heat transfer wall 3 of the sub side wall 2 is constituted by a sub side wall bottom wall 4, a sub side wall side wall 5, a rear heat transfer wall front wall 6 and a rear heat transfer wall side wall 7, and a joint corner 8 To form. The connecting section 8 is
The structure is such that they are welded to each other to seal the gas in the furnace. In this structure, in the joining corner 8, the above-mentioned walls intersect at one point. On the other hand, the fluid in the pipe rises in the furnace 1, the front and side walls enter the ceiling wall, the rear wall rises from the sub side wall bottom wall 4 to the sub side wall 5 and flows into the separator 15 together with the ceiling fluid. The separator 15 separates steam and water, and only the separated steam is supplied to a pipe arranged on the peripheral wall of the rear heat transfer wall 3.
ところで、管内流体温度は一様ではなく、流体経路に
沿って勾配があり(特に、副側壁2と後部伝熱壁3)、
各壁間の温度は異っている。By the way, the temperature of the fluid in the pipe is not uniform and has a gradient along the fluid path (in particular, the side wall 2 and the rear heat transfer wall 3),
The temperature between the walls is different.
特に、ボイラの起動・停止の如き過渡的状態において
は(火力発電は電力需要に応じてボイラの起動・停止が
多い)、管内の流体は水のみであり、セパレータ15より
前段の火炉1、前側壁4および5のみを流体が流れるた
め、後部伝熱壁3は空焚き状態になる。したがって、各
壁間の温度差が大きくなり、熱伸び差が大きくなる。こ
のため、取合コーナ8は、温度差による影響を受けにく
い材料および工法を用いる必要がある。In particular, in a transient state such as the start / stop of the boiler (there are many cases of starting / stopping the boiler according to the power demand in thermal power generation), the only fluid in the pipe is water, and the furnace 1 in front of the separator 15 Since the fluid flows only through the side walls 4 and 5, the rear heat transfer wall 3 is in an empty state. Therefore, the temperature difference between the walls becomes large, and the thermal expansion difference becomes large. For this reason, the joining corner 8 needs to use a material and a construction method that are not easily affected by the temperature difference.
ところで上記の如き従来構成であっては、取合コーナ
8において温度差を有する各壁が一点で交叉するように
溶接接合されているため、各壁の熱伸びが相互に拘束さ
れ、構造的剛性不連続によるひずみ集中も重なり、取合
コーナ8の近接に大きな熱応力が発生する。高頻度の起
動停止及び負荷変化運用ボイラにおいては、この熱応力
が繰返えされて、疲労亀裂が発生、進行し、管内流体の
漏洩がおきる可能性がある。By the way, in the conventional structure as described above, since the walls having the temperature difference in the joining corner 8 are welded and joined so as to intersect at one point, the thermal expansion of the walls is mutually restrained and the structural rigidity is increased. Strain concentration due to discontinuity also overlaps, and a large thermal stress is generated in the vicinity of the joining corner 8. In a high-frequency start / stop and load change operation boiler, this thermal stress is repeated, and a fatigue crack may occur and progress, and fluid in the pipe may leak.
管内流体経路の構成上、各壁間の温度差をなくするこ
とは困難であり、温度差があっても熱応力を低減させ
て、かつ炉内ガスシールできる構造が必要とされる。It is difficult to eliminate the temperature difference between the walls due to the configuration of the fluid path in the pipe, and a structure that can reduce the thermal stress even if there is a temperature difference and that can seal the gas in the furnace is required.
本発明の目的は、取合コーナ部に対する各壁間温度差
に起因する熱応力を低減できるようにしたボイラ炉壁コ
ーナ部の取合構造を提供することにある。An object of the present invention is to provide an attachment structure of a boiler furnace wall corner portion that can reduce thermal stress due to a temperature difference between the walls with respect to the attachment corner portion.
上記問題点を解決するため、本発明は、 流体が内部を流通する管路を並設してメンブレン壁を
形成し、このメンブレン壁で副側壁底壁、副側壁側壁な
らびに後部伝熱壁を構成して、前記副側壁側壁と後部伝
熱壁側壁をほぼ同一平面上に配置し、前記副側壁底壁を
副側壁底壁ならびに後部伝熱壁側壁に対してほぼ垂直の
方向に配置して、副側壁底壁と副側壁側壁と後部伝熱壁
側壁とをそれぞれ接合して三次元構造をとるボイラ装置
を対象とするものである。MEANS TO SOLVE THE PROBLEM In order to solve the said problem, this invention forms the membrane wall by arranging the pipelines through which a fluid circulates inside, and comprises a side wall bottom wall, a side wall side wall, and a rear heat transfer wall by this membrane wall. Then, the side wall side wall and the rear heat transfer wall side wall are arranged on substantially the same plane, and the side wall bottom wall is arranged in a direction substantially perpendicular to the side wall bottom wall and the rear heat transfer wall side wall, The present invention is intended for a boiler device that has a three-dimensional structure by joining the side wall bottom wall, the side wall side wall, and the rear heat transfer wall side wall, respectively.
そして前記副側壁側壁と後部伝熱壁側壁を接合して構
成した連結側壁の該接合部を外した所で、前記副側壁底
壁の終端部が前記連結側壁に接合されていることを特徴
とするものである。The connecting side wall formed by joining the side wall side wall and the rear heat transfer wall side wall is joined to the connecting side wall, and the end portion of the side wall bottom wall is joined to the connecting side wall. To do.
従来の水が流れる副側壁側壁と蒸気が流れる後部伝熱
壁側壁との接合部分で副側壁底壁の終端部を接合した場
合に比較して、本発明は前述のように連結側壁の副側壁
側壁と後部伝熱壁側壁との接合部を外した所で、副側壁
底壁の終端部を連結側壁に接合しているため、各壁間の
温度差に起因する熱応力を大幅に低減することができ
る。As compared with the conventional case where the end portion of the sub-sidewall bottom wall is joined at the joining portion of the sub-sidewall side wall through which water flows and the rear heat transfer wall side wall through which steam flows, the present invention provides the sub-sidewall of the connecting side wall as described above. At the place where the joint between the side wall and the rear heat transfer wall side wall is removed, the end of the sub side wall bottom wall is joined to the connecting side wall, so the thermal stress due to the temperature difference between the walls is greatly reduced. be able to.
以下、本発明の一実施例を図面に基づいて説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第1図は本発明の一実施例を示す斜視図であり、第2
図はその流体経路を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of the present invention.
The figure is a perspective view showing the fluid path.
第1図に示すように、水平に配設された副側壁底壁4
に対し、その側部には垂直に副側壁側壁5が配設され、
この側壁5に隣接ならびに同一平面上に後部伝熱壁側壁
7が配設されている。副側壁側壁5の下端は、側壁7寄
りの一部が入口管寄せ9に接続され、残る部分が入口管
寄せ12に接続されている。As shown in FIG. 1, the auxiliary side wall bottom wall 4 arranged horizontally.
On the other hand, the side wall 5 is disposed vertically on the side of the side wall 5,
A rear heat transfer wall side wall 7 is arranged adjacent to and on the same plane as the side wall 5. At the lower end of the sub-side wall 5 is connected a part of the side wall 7 to the inlet port 9 and the remaining part to the inlet port 12.
また、副側壁底壁4及び副側壁底壁5の各々に対して
直交するように後部伝熱壁前壁6が設けられている。こ
の前壁6の下端は入口管寄せ13に接続される(第2図参
照)。Further, a rear heat transfer wall front wall 6 is provided so as to be orthogonal to each of the auxiliary side wall bottom wall 4 and the auxiliary side wall bottom wall 5. The lower end of the front wall 6 is connected to the inlet header 13 (see FIG. 2).
底壁4、側壁5および側壁7の各々は、内部に水また
は蒸気の流通する直管と、各直管を同一平面上に固定な
らびに伝熱する板状体とを一体にして構成され、ボイラ
に導入された熱ガスの通路を形成している。Each of the bottom wall 4, the side wall 5, and the side wall 7 is configured by integrally forming a straight pipe through which water or steam flows and a plate-shaped body that fixes and heat-transfers each straight pipe on the same plane. It forms a passage for the hot gas introduced into.
副側壁側壁5に対しては、入口管寄せ9を通して壁内
の管に蒸気が供給されるが、この入口管寄せ9には入口
連絡管10が後部伝熱壁入口管寄せ13との間に連結されて
いる。この入口管寄せ13は第4図に示すように、セパレ
ータ15に連結されている。For the side wall 5 and the side wall, steam is supplied to the pipe in the wall through the inlet header 9. Between the inlet header 9 and the rear heat transfer wall inlet header 13 It is connected. The inlet header 13 is connected to a separator 15 as shown in FIG.
また、入口管寄せ9に接続された副側壁側壁5の後部
伝熱壁側壁7に寄った数本の壁内管は、反対方向(側壁
5の中央寄り)に移動させて入口管寄せ9に結合され
る。第1図に示すように、副側壁底壁4の終端部4aを副
側壁側壁5の後部伝熱壁側壁寄りの複数の管と後部伝熱
壁側壁7の所で接合することになる。In addition, some of the inner wall pipes which are connected to the rear heat transfer wall side wall 7 of the sub-sidewall 5 connected to the inlet header 9 are moved to the inlet header 9 by moving in the opposite direction (closer to the center of the sidewall 5). Be combined. As shown in FIG. 1, the terminating end 4a of the side wall bottom wall 4 is joined to the plurality of tubes near the side wall of the rear side heat transfer wall of the side side wall 5 at the side wall 7 of the rear side heat transfer wall.
以上の構成において、壁管の軸方向に温度差のある副
側壁5と後部伝熱壁7の取合位置を形状の複雑な3次元
の取合コーナ部8より離間させることができる結果、取
合コーナ部8の各壁間の取合箇所は、副側壁底壁5、後
部伝熱壁前壁6及び後部伝熱壁側壁7の3箇所に減少さ
せることができる。すなわち、各壁間の温度発生位置が
分散させることができるため、取合コーナ8の各壁間の
温度差に起因する熱応力を大幅に低減することができ
る。In the above configuration, the fitting position of the sub-side wall 5 and the rear heat transfer wall 7 having a temperature difference in the axial direction of the wall tube can be separated from the three-dimensional fitting corner portion 8 having a complicated shape. The number of attachment points between the respective walls of the compound corner portion 8 can be reduced to three locations of the sub-side wall bottom wall 5, the rear heat transfer wall front wall 6 and the rear heat transfer wall side wall 7. That is, since the temperature generation positions between the walls can be dispersed, the thermal stress due to the temperature difference between the walls of the joining corner 8 can be significantly reduced.
このように本実施例によれば、副側壁と後部伝熱壁下
部取合部の熱応力を大幅に低減でき、起動・停止運転に
ともなう熱応力の繰返しによる疲労亀裂発生の防止が可
能となり、ボイラの寿命を大幅に向上させることができ
る。この結果、高頻度の起動・停止運転が可能になる。
さらに、取合コーナ部の大幅な熱応力の低減が可能とな
るため、ガスシール用ケーシングを用いることなく、ガ
スシールの完全なメンブレン壁構造とすることができ
る。As described above, according to the present embodiment, it is possible to significantly reduce the thermal stress in the sub-side wall and the lower heat transfer wall lower joining portion, and it is possible to prevent the occurrence of fatigue cracks due to repeated thermal stress associated with start / stop operation. The life of the boiler can be greatly improved. As a result, high-frequency start / stop operation becomes possible.
Furthermore, since it is possible to significantly reduce the thermal stress in the joining corner portion, a complete membrane wall structure of the gas seal can be obtained without using a gas seal casing.
第3図は本発明の他の実施例を示す斜視図である。本
実施例は、第1図の実施例とは逆に、後部伝熱壁7の副
側壁側壁5に隣接する数本の管の下部を側壁7の中央寄
りに移動させ、副側副側壁5の端部との間に所定の距離
を設けるようにしたものである。FIG. 3 is a perspective view showing another embodiment of the present invention. In contrast to the embodiment shown in FIG. 1, in the present embodiment, the lower portions of some of the tubes adjacent to the side wall 5 of the rear heat transfer wall 7 are moved toward the center of the side wall 7 to move the sub side wall 5. A predetermined distance is provided between the end and the end.
即ち、前記数本の管を副側壁底壁4の取合位置の下か
ら副側壁位置にその上部を寄せるようにしたものであ
る。このような構成とすることにより、後部伝熱壁側壁
7の副側壁側壁寄りの複数の管上で副側壁底壁4の終端
部4aを接合することにより前記実施例と同様の効果が得
られる。That is, the above-mentioned several tubes are arranged so that their upper portions are brought closer to the sub-side wall position from below the position where the sub-side wall bottom wall 4 is joined. With such a configuration, the same effect as that of the above-described embodiment can be obtained by joining the terminal end portions 4a of the sub-side wall bottom wall 4 on the plurality of tubes near the sub-side wall side wall of the rear heat transfer wall side wall 7. .
発明者らの一実施結果によれば、温度差を有するボイ
ラ副側壁と後部伝熱壁等の三次元取合部における熱応力
が例えば数10%に低減し、ボイラの起動・停止に伴う繰
返し熱応力に対する疲労寿命を数10倍増大させうること
が確認された。しかも取合部に切り離しの不要なシンプ
ルな構造となり、例えば5万回の高頻度の起動・停止が
可能なことが確認された。According to one implementation result of the inventors, the thermal stress in the three-dimensional joints such as the boiler side wall and the rear heat transfer wall having a temperature difference is reduced to, for example, several tens of percent, and the repetition due to the start / stop of the boiler is repeated. It was confirmed that the fatigue life with respect to thermal stress could be increased several tens of times. Moreover, it has been confirmed that the connection has a simple structure that does not require disconnection, and that it can be started and stopped frequently, for example, 50,000 times.
本発明によれば、炉内ガスシール機能を損うことなく
各壁間の温度差に起因する取合部の熱応力を低減させる
ことができる。ADVANTAGE OF THE INVENTION According to this invention, the thermal stress of the joining part resulting from the temperature difference between each wall can be reduced, without impairing the gas sealing function in a furnace.
第1図は本発明の一実施例を示す斜視図、第2図は第1
図の実施例の流体経路の接続を示す斜視図、第3図は本
発明の他の実施例を示す斜視図、第4図はボイラの構成
例を示す斜視図である。 1……火炉、2……副側壁、3……後部伝熱壁、4……
副側壁底壁、5……副側壁側壁、6……後部伝熱壁前
壁、7……後部伝熱壁側壁、8……取合コーナ、9,12,1
3……入口管寄せ、10……入口連絡管、11……出口管寄
せ。FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG.
FIG. 3 is a perspective view showing the connection of fluid paths in the embodiment shown in FIG. 3, FIG. 3 is a perspective view showing another embodiment of the present invention, and FIG. 4 is a perspective view showing a structural example of a boiler. 1 ... Furnace, 2 ... Secondary side wall, 3 ... Rear heat transfer wall, 4 ...
Side wall bottom wall, 5 ... Side wall side wall, 6 ... Rear heat transfer wall front wall, 7 ... Rear heat transfer wall side wall, 8 ... Connecting corner, 9,12,1
3 …… Inlet heading, 10 …… Inlet connecting tube, 11 …… Outlet heading.
フロントページの続き (72)発明者 坂田 太郎 呉市宝町6番9号 バブコツク日立株式 会社呉工場内 (56)参考文献 実開 昭61−141508(JP,U)Front Page Continuation (72) Inventor Taro Sakata 6-9 Takaracho, Kure City Bab Kotsk Hitachi K.K. Co., Ltd. (56) Bibliography Sho 61-141508 (JP, U)
Claims (1)
ブレン壁を形成し、このメンブレン壁で副側壁底壁、副
側壁側壁ならびに後部伝熱壁を構成して、前記副側壁側
壁と後部伝熱壁側壁をほぼ同一平面上に配置し、前記副
側壁底壁を副側壁側壁ならびに後部伝熱壁側壁に対して
ほぼ垂直の方向に配置して、副側壁底壁と副側壁側壁と
後部伝熱壁側壁とをそれぞれ接合してなるボイラ装置に
おいて、 前記副側壁側壁と後部伝熱壁側壁を接合して構成した連
結側壁の該接合部を外した所で、前記副側壁底壁の終端
部が前記連結側壁に接合されていることを特徴とするボ
イラ装置。1. A membrane wall is formed by arranging pipelines through which a fluid flows inside, and the membrane wall constitutes a side wall bottom wall, a side wall side wall and a rear heat transfer wall, and the side wall side wall is formed. And the rear heat transfer wall side wall are arranged substantially on the same plane, and the sub side wall bottom wall is arranged in a direction substantially perpendicular to the sub side wall side wall and the rear heat transfer wall side wall. And a rear heat transfer wall side wall are joined together, wherein a sub-side wall bottom wall is formed by removing the joint part of the connecting side wall formed by joining the sub-side wall side wall and the rear heat transfer wall side wall. Boiler apparatus, wherein the terminal end of the is joined to the connecting side wall.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61228105A JP2525783B2 (en) | 1986-09-29 | 1986-09-29 | Boiler equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61228105A JP2525783B2 (en) | 1986-09-29 | 1986-09-29 | Boiler equipment |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18023195A Division JP2665208B2 (en) | 1995-07-17 | 1995-07-17 | Boiler equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6383505A JPS6383505A (en) | 1988-04-14 |
JP2525783B2 true JP2525783B2 (en) | 1996-08-21 |
Family
ID=16871276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61228105A Expired - Fee Related JP2525783B2 (en) | 1986-09-29 | 1986-09-29 | Boiler equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2525783B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0221104A (en) * | 1988-07-08 | 1990-01-24 | Babcock Hitachi Kk | Once-through boiler |
WO2014010034A1 (en) * | 2012-07-11 | 2014-01-16 | 株式会社 日立製作所 | Boiler combustion device |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61141508U (en) * | 1985-02-15 | 1986-09-01 |
-
1986
- 1986-09-29 JP JP61228105A patent/JP2525783B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPS6383505A (en) | 1988-04-14 |
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