JPS6383505A - Tie-in structure of boiler furnace-wall corner section - Google Patents
Tie-in structure of boiler furnace-wall corner sectionInfo
- Publication number
- JPS6383505A JPS6383505A JP22810586A JP22810586A JPS6383505A JP S6383505 A JPS6383505 A JP S6383505A JP 22810586 A JP22810586 A JP 22810586A JP 22810586 A JP22810586 A JP 22810586A JP S6383505 A JPS6383505 A JP S6383505A
- Authority
- JP
- Japan
- Prior art keywords
- wall
- side 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.)
- Granted
Links
- 239000012530 fluid Substances 0.000 claims description 12
- 239000012528 membrane Substances 0.000 claims description 8
- 230000008646 thermal stress Effects 0.000 description 12
- 238000005304 joining Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- YQEZLKZALYSWHR-UHFFFAOYSA-N Ketamine Chemical compound C=1C=CC=C(Cl)C=1C1(NC)CCCCC1=O YQEZLKZALYSWHR-UHFFFAOYSA-N 0.000 description 1
- 238000010795 Steam Flooding Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
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。[Detailed description of the invention] [Industrial application field] The present invention relates to a joint structure for a corner portion of a boiler furnace wall.
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。In particular, the present invention relates to a joint structure for boiler furnace wall corner parts suitable for reducing thermal stress due to temperature differences exerted on the corner parts.
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, etc., a system is used in which energy from a heat source is introduced into a boiler, heat is exchanged through heat exchanger tubes provided on the 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 of a membrane wall made by continuously welding tubes and bars, and the joint between the furnace wall and the rear heat transfer wall has a complex three-dimensional structure between 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
ラ壁は水ま九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, a boiler is constructed by connecting an auxiliary side wall 2 to the outlet side of a furnace 1 to which a heat source is supplied, and further connecting a rear heat transfer wall 3 adjacent to the side wall 2. ing. The boiler wall consists of a membrane wall made of continuously welded pipes and bars through which water and steam flow.
ま九、副側壁２と後部伝熱壁３の取合部は、副側壁底壁
４．副副側側側壁５．後伝熱壁前壁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
缶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、後蛍部は
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。9. The joint between the sub-side wall 2 and the rear heat transfer wall 3 is the sub-side wall bottom wall 4. Secondary side wall 5. It is composed of a rear heat transfer wall front wall 6 and a rear heat transfer wall side wall 7, and forms a joining corner 8. The connecting portions 8 are welded together to seal the furnace gas. In this structure, the can walls intersect at one point at the joining corner 8. On the other hand, the fluid in the pipe ascends through the furnace 1, the front and side wall portions enter the ceiling wall, and the rear flute portion ascends from the sub-side wall bottom wall 4 to the sub-side wall side wall 5, and flows into the separator 15 together with the ceiling fluid. Steam and water are separated by the separator 15, and only the separated steam is supplied to a pipe provided 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 fluid temperature in the pipe is not uniform, but has a gradient along the fluid path (especially the sub-side wall 2 and the rear heat transfer wall 3), and the temperature between each wall is different.
特Ｋ、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。Special K: In a transient state such as starting and stopping a boiler (in thermal power generation, boilers often start and stop depending on the power demand), the only fluid in the pipe is water.
セパレータ１５より前段の火炉ｌ、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。Since the fluid flows only through the furnace l and the front side walls 4 and 5 in the stage before the separator 15, the rear heat transfer wall 3 is in an empty firing state. Therefore, the temperature difference between each wall becomes large, and the thermal expansion difference becomes large. Therefore, it is necessary to use materials and construction methods for the joining corner 8 that are not easily affected by temperature differences.
ところで上記の如き従来構成にあっては、取合コーナ８
において温度差を有する缶壁が一点で交叉するように溶
接接合されているため、缶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の近傍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 configuration as described above, the connecting corner 8
Since the can walls are welded together so that they intersect at one point, which has a temperature difference at Large thermal stresses occur. In a boiler that undergoes frequent startup/shutdown operations and load changes, this thermal stress is repeated, causing fatigue cracks to develop and progress, potentially causing fluid leakage in the pipes.
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。Due to the structure of the fluid path inside the pipe, it is difficult to eliminate the temperature difference between each wall.
In addition, a structure that can seal the furnace gas 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。SUMMARY OF THE INVENTION An object of the present invention is to provide a joint structure for a boiler furnace wall corner that can reduce thermal stress caused by a temperature difference between walls at the joint corner.
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滅し、これを底
壁又は側壁に用いた副側壁及び後部伝熱壁を順次火炉に
連結して構成されるボイラにおいて、前記副側壁または
後部伝熱壁の一方の側壁の取合せ部の管端をその壁中央
側へ寄せるようにしである。In order to solve the above-mentioned problems, the present invention provides pipes through which fluid flows in parallel, deforms the membrane wall, and sequentially connects the sub-side wall and rear heat transfer wall using this as the bottom wall or side wall to the furnace. In the boiler, the tube end of the connecting portion of one side wall of the sub side wall or the rear heat transfer wall is moved toward the center of the wall.
上記手段によると、副側壁と後部伝熱壁の取合い位置を
隔離することにより温度差発生位置を分散させ、取合コ
ーナ部メンブレンバーを切り離すことなく、取合コーナ
部の熱応力の低減を図ったボイラ炉壁コーナ部の取合構
造を構成できる。According to the above means, by isolating the joining positions of the sub-side wall and the rear heat transfer wall, the positions where temperature differences occur are dispersed, and the thermal stress at the joining corner can be reduced without separating the joining corner membrane bar. It is possible to construct a joint structure for the corner part of the boiler furnace wall.
以下、本発明の一実施例を図面に基づいて説明する。Hereinafter, one embodiment of the present invention will be described based on 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, and FIG. 2 is a perspective view showing a fluid path thereof.
第１図に示すように、水平に配設され九副側壁底壁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, a sub-side wall side wall 5 is arranged vertically on the side of the nine sub-side wall bottom wall 4 which is arranged horizontally, and a rear transmission wall 5 is arranged adjacent to and on the same plane as the sub-side wall side wall 5. Thermal wall side wall 7
is installed. A portion of the lower end of the side wall 5 near the side wall 7 is connected to the inlet header 9, and the remaining portion is connected to the inlet header 12.
また、副側壁底壁４及び副側壁側壁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の下端は出口管寄せ１１に接続される。Further, a rear heat transfer wall front wall 6 is provided so as to be orthogonal to each of the sub-side wall bottom wall 4 and the sub-side wall side wall 5. The lower end of this front wall 6 is connected to an outlet header 11.
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, side wall 5, and side wall 7 is constructed by integrating a straight pipe through which water or steam flows, and a plate-shaped body that fixes each straight pipe on the same plane and conducts heat. It forms a passage for hot gas introduced into the
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。このほか入口管寄せ１３には、出口管寄せ１１
が接続されている。For the side wall 5, steam is supplied to the tubes inside the wall through the inlet header 9, and the inlet connecting pipe 10 is connected to the rear heat transfer wall inlet header 13 between the inlet header 9 and the rear heat transfer wall inlet header 13. connected. In addition, the inlet header 13 has an outlet header 11.
is connected.
この入口管寄せは第２図に示すように、セパレータ１５
に連結されている。This inlet header has a separator 15 as shown in FIG.
is connected to.
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に寄つ九数本の壁内管は、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。In addition, nine or more intra-wall tubes approaching the rear heat transfer wall side wall 7 of the sub-side wall side wall 5 connected to the inlet header 9 are connected in the opposite direction (the side wall 5
(closer to the center) and is connected to the inlet header 9.
第１図に示すように、取合部の副側壁側壁５と後部伝熱
壁側壁７とは隔離、すなわち副側壁と後部伝熱壁の側壁
取合位置を取合コーナ部から外すことができる。As shown in FIG. 1, the secondary side wall 5 and the rear heat transfer wall side wall 7 of the connecting part can be separated, that is, the side wall connecting position of the secondary side wall and the rear heat transfer wall can be removed from the connecting corner. .
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７０３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を分
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 connection position between the secondary side wall 5 and the rear heat transfer wall 7, which have a temperature difference in the axial direction of the wall tube, can be separated from the three-dimensional connection corner part 8 with a complicated shape. The connection points between the walls of the joint corner portion 8 can be reduced to three points: the sub-side wall bottom wall 5, the rear heat transfer wall front wall 6, and the rear heat transfer wall side wall 703. That is, since the temperature generation positions between the respective walls can be dispersed, the thermal stress caused by the temperature difference between the respective 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２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２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。In this way, according to this embodiment, the thermal stress at the joint between the sub-side wall and the lower part of the rear heat transfer wall can be significantly reduced by 2, making it possible to prevent the occurrence of fatigue cracks due to repeated thermal stress caused by starting and stopping operations. As a result, the life of the tube 2 can be greatly improved. As a result, frequent start-up and stop operations are possible.
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
。Furthermore, since it is possible to significantly reduce thermal stress at the joining corner, a complete membrane wall structure for the gas seal can be achieved 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、副側壁側壁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 this embodiment, contrary to the embodiment shown in FIG. A predetermined distance is provided between the end portion and the end portion.
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。That is, the upper portions of the several tubes are moved from below the joining position of the sub-side wall bottom wall 4 to the sub-side wall position.
このような構成とすることにより。By having such a configuration.
副側壁側壁５と後部伝熱壁側壁７の取合位置を、取合コ
ーナより離すことにより前記実施例と同様の効果が得ら
れる。Effects similar to those of the previous embodiment can be obtained by separating the joining position of the sub-side wall side wall 5 and the rear heat transfer wall side wall 7 from the joining corner.
発明者らの一実施結果によれば、温度差を有するゲイ２
副側壁と後部伝熱壁等の３次限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倍増大させうろこ
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 by the inventors, gay 2 with a temperature difference
It has been confirmed that the thermal stress at the tertiary joints such as the sub-side wall and the rear heat transfer wall will be reduced to, for example, several tens of percent, and the fatigue life against repeated thermal stress caused by starting and stopping the boiler will be increased several tens of times. It was done. Moreover, it has a simple structure that requires no separation at the joint, and it has been confirmed that it can be started and stopped at a high frequency of, 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。According to the present invention, it is possible to reduce the thermal stress in the joint caused by the temperature difference between the walls without impairing the in-furnace gas sealing function.
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、９，１２．１３・・・・・・入口管寄せ、１０・
・・・・・入口連絡管、１１・・・・・・出口管寄せ。
第１図
℃
第４図
第３図FIG. 1 is a perspective view showing one embodiment of the present invention, FIG. 2 is a perspective view showing connection of fluid paths in the embodiment of FIG. 1, and FIG. 3 is a perspective view showing another embodiment of the present invention. FIG. 4 is a perspective view showing an example of the configuration of the boiler. 1...Furnace, 2...Sub-side wall, 3...
... Rear heat transfer wall, 4 ... Sub-side wall bottom wall, 5 ...
...Sub-side wall side wall, 6... Rear heat transfer wall front wall,
7... Rear heat transfer wall side wall, 8... Connection corner, 9, 12.13... Inlet pipe header, 10.
...Inlet connecting pipe, 11...Outlet pipe header. Figure 1 °C Figure 4 Figure 3
Claims (1)
成し、これを底壁又は側壁に用いた副側壁及び後部伝熱
壁を順次火炉に連結して構成されるボイラにおいて、前
記副側壁または後部伝熱壁の一方の側壁の取合せ部の管
端をその壁中央側へ寄せたことを特徴とするボイラ炉壁
コーナ部の取合構造。In a boiler constructed by forming a membrane wall by arranging pipes through which fluid flows in parallel, and sequentially connecting a sub-side wall using the membrane wall as a bottom wall or a side wall and a rear heat transfer wall to a furnace, A joint structure for a corner part of a boiler furnace wall, characterized in that the tube end of the joint part of one of the side walls or the rear heat transfer wall is moved toward the center of the 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 true JPS6383505A (en) | 1988-04-14 |
| JP2525783B2 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) |
Cited By (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 |
Citations (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
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61141508U (en) * | 1985-02-15 | 1986-09-01 |
Cited By (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2525783B2 (en) | 1996-08-21 |
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| Date | Code | Title | Description |
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| LAPS | Cancellation because of no payment of annual fees |