JPH0861603A - Boiler furnace internal pressure supporting device - Google Patents
Boiler furnace internal pressure supporting deviceInfo
- Publication number
- JPH0861603A JPH0861603A JP19410194A JP19410194A JPH0861603A JP H0861603 A JPH0861603 A JP H0861603A JP 19410194 A JP19410194 A JP 19410194A JP 19410194 A JP19410194 A JP 19410194A JP H0861603 A JPH0861603 A JP H0861603A
- Authority
- JP
- Japan
- Prior art keywords
- wind box
- furnace
- boiler
- backstay
- boiler furnace
- 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
Landscapes
- Air Supply (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、水平断面形状が方形の
ボイラ火炉の燃焼用風箱がボイラ火炉各壁の水平断面中
心部に設置された場合の有効的な炉内圧支持装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an effective in-core pressure supporting device when a combustion air box for a boiler furnace having a rectangular horizontal cross section is installed at the center of the horizontal cross section of each wall of the boiler furnace.
【０００２】[0002]
【従来の技術】図６はボイラ火炉のコーナー部に燃焼用
風箱が設けられた従来のボイラ炉内圧支持装置の一例を
示す正面図、図７は図６のVII −VII 矢視水平断面図で
ある。2. Description of the Related Art FIG. 6 is a front view showing an example of a conventional boiler furnace internal pressure support device in which a combustion air box is provided at a corner of a boiler furnace, and FIG. 7 is a horizontal sectional view taken along the line VII-VII in FIG. Is.
【０００３】これらの図において、ボイラ火炉壁（０
１）の各コーナー部に設けられた風箱（０２）の上方お
よび下方で、ボイラ火炉壁（０１）の四周に火炉内圧を
受ける水平な主バックステイ（０４）がそれぞれ設けら
れており、それら上下の主バックステイ（０４）の間に
鉛直な竪バックステイ（０５）が設けられている。また
風箱（０２）の上下端の間の複数の高さ位置で上記竪バ
ックステイ（０５）を水平に連結するローカルバックス
テイ（０６）が設けられている。このようにして、ボイ
ラ火炉壁（０１）に作用する炉内圧をローカルバックス
テイ（０６）により容易に支持することができる。In these figures, the boiler furnace wall (0
Above and below the wind box (02) provided at each corner of 1), horizontal main backstays (04) that receive the internal pressure of the furnace are provided on the four circumferences of the boiler furnace wall (01). A vertical vertical backstay (05) is provided between the upper and lower main backstays (04). Further, local backstays (06) horizontally connecting the vertical backstays (05) are provided at a plurality of height positions between the upper and lower ends of the wind box (02). In this way, the internal pressure acting on the boiler furnace wall (01) can be easily supported by the local backstays (06).
【０００４】[0004]
【発明が解決しようとする課題】発電事業用ボイラの燃
焼用風箱は、従来その燃焼性から炉壁面のコーナーに設
けられることが多く、炉内圧を支持するローカルバック
ステイもコーナーで風箱または竪バックステイを利用し
て比較的簡単に支持することができた。ところが最近で
は、公害規制値などの制約を回避するために、各壁の水
平断面中央部附近に風箱が設置される例があり、ボイラ
壁面の炉内圧支持方法に改善が必要となった。すなわち
燃焼用風箱が各壁の比較的中央部に位置して設けられる
場合は、ボイラ各壁の炉内圧を支持するローカルバック
ステイは風箱によって左右に分断されるので、ローカル
バックステイで支持した反力を有効に伝達することがで
きなくなった。Conventionally, a combustion air box of a boiler for a power generation business is often provided in a corner of a furnace wall surface because of its combustibility, and a local backstay for supporting the pressure in the furnace also has a wind box or a corner in the corner. It was possible to support relatively easily using the vertical back stay. However, recently, in order to avoid restrictions such as pollution control values, there is an example in which a wind box is installed near the center of the horizontal cross section of each wall, and it is necessary to improve the method for supporting the reactor pressure inside the boiler wall. That is, when the combustion air box is installed at a relatively central portion of each wall, the local backstay supporting the furnace pressure on each wall of the boiler is divided into left and right by the air box, so it is supported by the local backstay. It became impossible to effectively transmit the reaction force.
【０００５】[0005]
【課題を解決するための手段】本発明者は、前記従来の
課題を解決するために、角筒状のボイラ火炉の各壁水平
断面中央部に上下方向に長い燃焼用の風箱が設けられる
ボイラにおいて、上記風箱の上方および下方で上記ボイ
ラ火炉の四周にそれぞれ水平に設けられた主バックステ
イと、上記風箱の上端および下端を上記主バックステイ
にそれぞれ鉛直に連結する補助バックステイと、上記風
箱の上下端の間の複数の高さ位置で上記風箱の両側面板
に取合い金物で連結され上記ボイラ火炉壁外面の上記風
箱のない部分を囲んでそれぞれ水平に設けられたローカ
ルバックステイとを備えたことを特徴とするボイラ炉内
圧支持装置を提案するものである。In order to solve the above-mentioned conventional problems, the inventor of the present invention provides a vertically long combustion wind box at the central portion of the horizontal cross section of each wall of a square tubular boiler furnace. In the boiler, main backstays provided horizontally above and below the wind box on the four sides of the boiler furnace, and auxiliary backstays that vertically connect the upper and lower ends of the wind box to the main backstays, respectively. , Locals that are connected horizontally to the side plates of the wind box at a plurality of height positions between the upper and lower ends of the wind box by means of a fitting and surround the portion of the outer surface of the boiler furnace wall where the wind box is not provided, respectively horizontally. The present invention proposes a boiler furnace internal pressure support device characterized by including a backstay.
【０００６】[0006]
【作用】本発明は前記構成を有するので、火炉内の圧力
は、火炉壁を通じ、複数の高さ位置に水平に設けられた
ローカルバックステイによって支持され、更に取合い金
物を介して火炉壁水平断面中央部に上下方向に設けられ
た風箱に伝達される。そして風箱の上下端に取付けられ
た補助バックステイを介して、風箱の上方および下方で
上記ボイラ火炉の四周にそれぞれ水平に設けられた主バ
ックステイに集約される。したがって、従来のような竪
バックステイ等を必要とせず、簡単な構造で安定的に荷
重を支持することができる。Since the present invention has the above-mentioned structure, the pressure in the furnace is supported by the local backstays horizontally provided at a plurality of height positions through the furnace wall, and further the horizontal cross section of the furnace wall is provided through the fitting. It is transmitted to the wind box installed vertically in the center. Then, via auxiliary backstays attached to the upper and lower ends of the wind box, the main backstays are provided horizontally above and below the wind box, respectively, horizontally on the four circumferences of the boiler furnace. Therefore, it is possible to stably support the load with a simple structure without requiring a vertical back stay or the like as in the related art.
【０００７】[0007]
【実施例】図１は本発明の一実施例を示す正面図、図２
は図１のII−II矢視水平断面図、図３は図１のIII 部を
拡大して示す図、図４は図２のIV部を拡大して示す図、
図５は図４のＶ−Ｖ矢視縦断側面図である。1 is a front view showing an embodiment of the present invention, FIG.
1 is a horizontal sectional view taken along the line II-II of FIG. 1, FIG. 3 is an enlarged view of the III portion of FIG. 1, FIG. 4 is an enlarged view of the IV portion of FIG.
FIG. 5 is a vertical sectional side view taken along the line VV of FIG.
【０００８】図中（１）は角筒状のボイラ火炉の炉壁で
あって、多数の炉壁管（１ａ）によって構成されてお
り、その各炉壁（１）の水平断面中央部に上下方向に長
い燃焼用の風箱（２）が設けられている。すなわちボイ
ラの火炉に導入される燃焼用空気を溜めて炉内に噴出さ
せる個所では炉壁管（１ａ）が図４、図５に示されるよ
うに管曲げされて開口部が設けられ、その開口部で高温
の空気が外部に洩れないように、４周が完全にシールさ
れた風箱と呼ぶダクト状構造物（２）がはめ込まれて、
その側面は鋼板にＬ型鋼などで補強されている。そし
て、その風箱（２）内に燃焼用バーナー（３）が設置さ
れる。風箱（２）と火炉壁（１）とは溶接で接続され
る。火炉壁（１）はすべてメンブレーンウオールになっ
ていて、高温の燃焼用空気が洩れないようになってい
る。また風箱（２）は火炉壁（１）との取合部で溶接し
て取付られるので、取合点からの高温の燃焼用空気が洩
れることはない。In the figure, (1) is a furnace wall of a square tube-shaped boiler furnace, which is composed of a large number of furnace wall tubes (1a), and the furnace walls (1) are vertically arranged at the center of the horizontal cross section. A wind box (2) for combustion that is long in the direction is provided. That is, at the location where the combustion air introduced into the furnace of the boiler is collected and ejected into the furnace, the furnace wall tube (1a) is bent as shown in FIGS. In order to prevent hot air from leaking to the outside, a duct-shaped structure (2) called a wind box, which is completely sealed on four laps, is fitted into it,
The side surface of the steel plate is reinforced with L-shaped steel or the like. Then, a combustion burner (3) is installed in the wind box (2). The wind box (2) and the furnace wall (1) are connected by welding. The furnace wall (1) is a membrane wall so that high temperature combustion air does not leak. Further, since the wind box (2) is attached by welding at the joint with the furnace wall (1), high temperature combustion air does not leak from the joint.
【０００９】（４）は上記風箱（２）の上方および下方
で上記ボイラ火炉壁（１）の四周にステイラップ（９）
を介してそれぞれ水平に取付けられた主バックステイ、
（８）は上記風箱（２）の上端および下端を上記主バッ
クステイ（４）にそれぞれ鉛直に連結する補助バックス
テイである。また上記風箱（２）の上下端の間の複数の
高さ位置で（例えば４，５段）上記ボイラ火炉壁（１）
外面の上記風箱（２）のない部分を囲んで、水平なロー
カルバックステイ（６）がステイラップ（１０）を介し
て取付けられ、上記風箱（２）の両側面板に溶接された
取合い金物（７）に連結されている。すなわち本実施例
のローカルバックステイ（６）は風箱（２）によって分
断されている。(4) is a stay wrap (9) above and below the wind box (2) around the four sides of the boiler furnace wall (1).
Main backstays, each mounted horizontally via
(8) is an auxiliary backstay that vertically connects the upper end and the lower end of the wind box (2) to the main backstay (4), respectively. The boiler furnace wall (1) at a plurality of height positions (for example, 4,5 steps) between the upper and lower ends of the wind box (2).
A fitting which has a horizontal local backstay (6) attached via a stay wrap (10) surrounding the outer surface of the wind box (2) and is welded to both side plates of the wind box (2). It is linked to (7). That is, the local backstay (6) of this embodiment is divided by the wind box (2).
【００１０】火炉内の圧力は火炉壁（１）を通じステイ
ラップ（１０）を介して、ローカルバックステイ（６）
に集約される。ローカルバックステイ（６）で受けた炉
内圧反力は、取合い金物（７）を通して風箱（２）の側
面板に負荷される。こうして複数のローカルバックステ
イ（６）の全ての反力が風箱（２）の強固な側面板に集
約され、風箱（２）の上下端に溶接された補助バックス
テイ（８）を通して、風箱（２）の上方および下方のボ
イラ４周壁に強固に取付けられた主バックステイ（４）
に集約される。したがって、安定した荷重支持が簡単に
できる。すなわち、火炉壁（１）の水平断面中央付近に
設置された風箱（２）によって分断されたローカルバッ
クステイ（６）の反力を、荷重伝達のために従来のよう
な竪バックステイ（図６、図７中の符号（０５））を特
別に設置することなく、さらに余分な鋼材を使用するこ
となく比較的簡単に、鋼板をＬ型鋼などで補強した風箱
（２）の側面板を強度部材として利用し、主バックステ
イ（４）に伝達することができる。The pressure in the furnace is controlled by the local back stay (6) through the furnace wall (1) and the stay wrap (10).
Are summarized in. The reaction pressure in the furnace received by the local backstay (6) is applied to the side plate of the wind box (2) through the fitting (7). In this way, all the reaction forces of the plurality of local backstays (6) are concentrated on the strong side plate of the wind box (2), and the wind is passed through the auxiliary backstays (8) welded to the upper and lower ends of the wind box (2). Main backstays (4) firmly attached to the peripheral walls of the boiler 4 above and below the box (2)
Are summarized in. Therefore, stable load support can be easily performed. That is, the reaction force of the local backstay (6), which is divided by the wind box (2) installed near the center of the horizontal cross section of the furnace wall (1), transfers the reaction force of the conventional vertical backstay (Fig. 6, the reference numeral (05) in FIG. 7 is not particularly installed, and the side plate of the wind box (2) in which the steel plate is reinforced with L-shaped steel or the like can be relatively easily performed without using extra steel material. It can be used as a strength member and transmitted to the main backstay (4).
【００１１】なお補助バックステイ（８）と主バックス
テイ（４）との結合部およびローカルバックステイ
（６）と取合い金物（７）との結合部は、取合ボルト・
ナットと長穴を利用することにより、熱膨張差を吸収で
きるようになっている。The connecting part between the auxiliary backstay (8) and the main backstay (4) and the connecting part between the local backstay (6) and the fitting (7) are connected by a connecting bolt.
By utilizing the nut and the long hole, the difference in thermal expansion can be absorbed.
【００１２】[0012]
【発明の効果】本発明においては、風箱の側板を強度構
造物として利用することができるので、風箱の両側に特
別に設置した竪型のバックステイに風箱で分断されたロ
ーカルバックステイの反力を負荷する従来の構造と比較
して、竪バックステイが不要となるばかりでなく、風箱
にかかる風圧反力までも上方下方に設置された主バック
ステイで安定的に支持する、簡単な構造が得られる。し
たがって、ボイラ据付時の組立工数や物量の減少など、
ボイラ全体のコストダウンに大きく寄与するのみなら
ず、運転時の安定操業に対する信頼性が大幅に向上す
る。In the present invention, since the side plate of the wind box can be used as a strength structure, the vertical back stays specially installed on both sides of the wind box are divided into the local back stays separated by the wind box. Compared with the conventional structure that loads the reaction force of, the vertical back stay is not only required, but also the wind reaction force applied to the wind box is stably supported by the main back stay installed above and below, A simple structure is obtained. Therefore, assembling man-hours and the amount of material when installing the boiler are reduced.
Not only does it contribute greatly to the cost reduction of the entire boiler, but it also greatly improves the reliability of stable operation during operation.
【図１】図１は本発明の一実施例を示す正面図である。FIG. 1 is a front view showing an embodiment of the present invention.
【図２】図２は図１のII−II矢視水平断面図である。FIG. 2 is a horizontal sectional view taken along the line II-II of FIG.
【図３】図３は図１のIII 部を拡大して示す図である。FIG. 3 is an enlarged view of a portion III in FIG.
【図４】図４は図２のIV部を拡大して示す図である。FIG. 4 is an enlarged view of a portion IV in FIG.
【図５】図５は図４のＶ−Ｖ矢視縦断側面図である。5 is a vertical cross-sectional side view taken along the line VV of FIG.
【図６】図６はボイラ火炉のコーナー部に燃焼用風箱が
設けられた従来のボイラ風箱支持装置の一例を示す正面
図である。FIG. 6 is a front view showing an example of a conventional boiler air box supporting device in which a combustion air box is provided in a corner portion of a boiler furnace.
【図７】図７は図６のVII −VII 矢視水平断面図であ
る。FIG. 7 is a horizontal sectional view taken along the line VII-VII of FIG.
（０１），（１） ボイラ火炉壁 （１ａ） 炉壁管 （０２），（２） （燃焼用）風箱 （３） 燃焼用バーナ （０４），（４） 主バックステイ （０５） 竪バックステイ （０６），（６） ローカルバックステイ （７） 取合い金物 （８） 補助バックステイ （９),(1０） ステイラップ (01), (1) Boiler furnace wall (1a) Furnace wall tube (02), (2) Wind box for combustion (3) Burner for combustion (04), (4) Main backstay (05) Vertical back Stay (06), (6) Local backstay (7) Matching hardware (8) Auxiliary backstay (9), (10) Stay wrap
Claims (1)
部に上下方向に長い燃焼用の風箱が設けられるボイラに
おいて、上記風箱の上方および下方で上記ボイラ火炉の
四周にそれぞれ水平に設けられた主バックステイと、上
記風箱の上端および下端を上記主バックステイにそれぞ
れ鉛直に連結する補助バックステイと、上記風箱の上下
端の間の複数の高さ位置で上記風箱の両側面板に取合い
金物で連結され上記ボイラ火炉壁外面の上記風箱のない
部分を囲んでそれぞれ水平に設けられたローカルバック
ステイとを備えたことを特徴とするボイラ炉内圧支持装
置。1. A boiler in which a vertically long combustion air box is provided at the center of the horizontal cross section of each wall of a square tube-shaped boiler furnace. A main backstay, an auxiliary backstay vertically connecting the upper and lower ends of the wind box to the main back stay, and the wind box at a plurality of height positions between the upper and lower ends of the wind box. And a local backstay horizontally connected to both side plates of the boiler by means of a fitting and surrounding the portion of the outer surface of the boiler furnace wall where the wind box is not provided, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19410194A JP3150539B2 (en) | 1994-08-18 | 1994-08-18 | Boiler furnace pressure support device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19410194A JP3150539B2 (en) | 1994-08-18 | 1994-08-18 | Boiler furnace pressure support device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0861603A true JPH0861603A (en) | 1996-03-08 |
| JP3150539B2 JP3150539B2 (en) | 2001-03-26 |
Family
ID=16318968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19410194A Expired - Fee Related JP3150539B2 (en) | 1994-08-18 | 1994-08-18 | Boiler furnace pressure support device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3150539B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011257089A (en) * | 2010-06-10 | 2011-12-22 | Babcock Hitachi Kk | Boiler device |
-
1994
- 1994-08-18 JP JP19410194A patent/JP3150539B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011257089A (en) * | 2010-06-10 | 2011-12-22 | Babcock Hitachi Kk | Boiler device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3150539B2 (en) | 2001-03-26 |
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