JP2001012702A - Downcast pipe structure for circulating type boiler - Google Patents

Downcast pipe structure for circulating type boiler

Info

Publication number
JP2001012702A
JP2001012702A JP11182134A JP18213499A JP2001012702A JP 2001012702 A JP2001012702 A JP 2001012702A JP 11182134 A JP11182134 A JP 11182134A JP 18213499 A JP18213499 A JP 18213499A JP 2001012702 A JP2001012702 A JP 2001012702A
Authority
JP
Japan
Prior art keywords
furnace
corner
pipes
heat receiving
panel
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
Application number
JP11182134A
Other languages
Japanese (ja)
Inventor
Yoshimitsu Tsumita
佳満 積田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHI Corp
Original Assignee
IHI Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IHI Corp filed Critical IHI Corp
Priority to JP11182134A priority Critical patent/JP2001012702A/en
Publication of JP2001012702A publication Critical patent/JP2001012702A/en
Pending legal-status Critical Current

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  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

PROBLEM TO BE SOLVED: To simplify structure and remove limitation in installation of downcast pipes by obliquely providing a corner heat receiving panel at a corner of a furnace in which the wall surface consist of furnace wall pipes and permitting the furnace wall pipes as the corner which is shut out by the corner heat receiving panel to communicate with liquid in a steam separating drum so as to be used as downcast pipes. SOLUTION: A corner heat receiving panel 15 is provided so as to bridge the corner made by a wall surface 2 and another adjacent wall surface 2, and a heat insulating material 18 is provided at the back surface of the panel, so that the portion of a triangle including the panel 15 as its leg is physically and thermally shut out from the inside of a furnace 1. Furnace wall pipes 16 of the panel 15, as well as furnace wall pipes 3 of the wall surface 2, communicate with a steam separating drum from the upper portion by way of an upper header, and the lower end communicates with downcast pipes 20 by way of a lower header. Thus the downcast pipes are not required to be separately provided, and hence only a small space is needed for the installation and it is not necessary to consider connection with other structure such as a steel frame and the like. As a result, the structure can be simplified, the thickness of the piping can be reduced, and also, the weight can be reduced.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、循環形ボイラの降
水管構造に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a downcomer structure for a circulation boiler.

【0002】[0002]

【従来の技術】従来より、火力発電設備等ではボイラ水
を自然循環又は強制循環させている循環形ボイラが使用
されている。図3により循環形ボイラの一例を説明す
る。
2. Description of the Related Art Conventionally, a circulation type boiler in which boiler water is naturally circulated or forcedly circulated has been used in thermal power generation equipment and the like. An example of a circulation boiler will be described with reference to FIG.

【0003】図中1は火炉であり、該火炉1の平断面形
状は矩形となっており、該火炉1の前後左右の壁面2は
炉壁管3によって形成されている。前記火炉1の上部に
は気水分離ドラム4が配設され、該気水分離ドラム4の
液部5には給水管11が連通し、該給水管11を介して
外部から加温された水が供給される様になっており、前
記火炉1の分離部6には前記炉壁管3が上部管寄せ7を
介して連通し、前記炉壁管3は火炉1の下部で下部管寄
せ8に連通している。
[0003] In the figure, reference numeral 1 denotes a furnace. The furnace 1 has a rectangular cross section in plan view, and front, rear, left and right wall surfaces 2 of the furnace 1 are formed by furnace wall tubes 3. A steam / water separation drum 4 is provided at the upper part of the furnace 1, and a water supply pipe 11 communicates with a liquid portion 5 of the steam / water separation drum 4, and water heated from outside via the water supply pipe 11 is provided. The furnace wall tube 3 communicates with the separation section 6 of the furnace 1 via an upper header 7, and the furnace wall tube 3 is connected to a lower header 8 at a lower portion of the furnace 1. Is in communication with

【0004】前記液部5には複数の降水管9が連通し、
該降水管9は前記火炉1の外側を降下し、前記火炉1の
下部で水平部9aを形成している。該水平部9aと前記
下部管寄せ8とは連絡管10により連通されている。
[0004] A plurality of downcomers 9 communicate with the liquid part 5,
The downcomer 9 descends outside the furnace 1 to form a horizontal portion 9 a at the lower part of the furnace 1. The horizontal portion 9a and the lower header 8 are communicated by a communication pipe 10.

【0005】前記気水分離ドラム4で気水分離された取
出された蒸気Sは天井壁12を経て図示しない過熱器に
導かれる。
The steam S taken out of the steam / water separation drum 4 is guided to a superheater (not shown) through a ceiling wall 12.

【0006】上記した循環形ボイラに於いて、前記炉壁
管3をボイラ水が上昇し加熱され、水蒸気を含む加熱水
が前記気水分離ドラム4に導かれてボイラ水Wと蒸気S
とに分けられ、取出された蒸気Sは前記天井壁12に供
給された後図示しない過熱器等に導かれ、又前記気水分
離ドラム4内のボイラ水Wは前記降水管9を降下して、
水平部9a、下部管寄せ8を経て再び前記炉壁管3に供
給されて加熱が行われる様になっている。
In the above-mentioned circulation type boiler, boiler water rises and is heated in the furnace wall tube 3, and heated water containing steam is guided to the steam separator drum 4 and boiler water W and steam S
The steam S taken out is supplied to the ceiling wall 12 and then guided to a superheater (not shown), and the boiler water W in the steam separator 4 descends through the downcomer 9. ,
The heat is supplied to the furnace wall tube 3 again through the horizontal portion 9a and the lower header 8, and heating is performed.

【0007】[0007]

【発明が解決しようとする課題】前記降水管9は前記気
水分離ドラム4で蒸気Sが分離されたボイラ水Wを降下
させるものであり、分離されたボイラ水Wを降下させる
に必要な流路断面積が必要であり、而も高温、高圧を保
っている。従って、前記降水管9は大径で肉厚の大きい
配管となっており、大重量であり、火炉1外部に独立し
て設けられる為、配管の設置スペースが必要となると共
にバーナ、支持鉄骨等他の構造物との取合いがあり、支
持構造が複雑となっていた。この為、設備コストが高く
なると共にボイラ全体としての設置スペースが大きくな
るという問題があった。
The downcomer 9 lowers the boiler water W from which the steam S has been separated by the steam separator 4, and the flow required for lowering the separated boiler water W. It requires a road cross-section and maintains a high temperature and high pressure. Therefore, the downcomer 9 is a large-diameter, thick-walled pipe, is heavy, and is provided independently outside the furnace 1, so that a space for installing the pipe is required and a burner, a supporting steel frame, and the like are required. The support structure became complicated due to the involvement with other structures. For this reason, there has been a problem that the equipment cost is increased and the installation space of the entire boiler is increased.

【0008】本発明は斯かる実情に鑑み、循環形ボイラ
の降水管構造の構造を簡潔化し、降水管の施工上の制約
を解消し、コストの低減、更には設置スペースの節約を
図るものである。
The present invention has been made in view of the above circumstances, and aims at simplifying the structure of the downcomer pipe structure of a circulation boiler, eliminating restrictions on the construction of downcomer pipes, reducing costs, and further saving installation space. is there.

【0009】[0009]

【課題を解決するための手段】本発明は、炉壁管によっ
て壁面が形成される火炉の隅部に、斜めに角部受熱パネ
ルを設け、該角部受熱パネルによって遮蔽された隅部の
炉壁管を気水分離ドラムの液部に連通して降水管として
使用した循環形ボイラの降水管構造に係り、又前記角部
受熱パネルが炉壁管を連設して構成され、背面側に保温
材を設けた循環形ボイラの降水管構造に係るものであ
り、火炉の炉壁の一部を降水管として使用することか
ら、別途降水管を設ける必要がなく、レイアウトの制約
を受けることがなく、又降水管として使用する配管の径
が小さくなるので、肉厚を薄くでき重量の軽減が図れ
る。
According to the present invention, a corner heat receiving panel is provided diagonally at a corner of a furnace whose wall is formed by a furnace wall tube, and the furnace at the corner shielded by the corner heat receiving panel is provided. The present invention relates to a downcomer structure of a circulating boiler in which a wall tube is used as a downcomer by communicating with a liquid portion of a steam separator, and the corner heat receiving panel is formed by connecting a furnace wall tube to a rear side. It is related to the downcomer structure of a circulation type boiler equipped with heat insulating material.Since a part of the furnace wall of the furnace is used as the downcomer, there is no need to provide a separate downcomer, and the layout is restricted. In addition, since the diameter of the pipe used as the downcomer is reduced, the wall thickness can be reduced and the weight can be reduced.

【0010】[0010]

【発明の実施の形態】以下、図面を参照しつつ本発明の
実施の形態を説明する。
Embodiments of the present invention will be described below with reference to the drawings.

【0011】図1、図2は共に火炉1の角部の部分を示
し、図中図3中で示したものと同様のものには同符号を
付し、共通部分については説明を省略する。
FIGS. 1 and 2 both show a corner portion of the furnace 1. In FIG. 1, the same components as those shown in FIG. 3 are denoted by the same reference numerals, and the description of the common portions will be omitted.

【0012】隣接する壁面2と壁面2との角部に掛渡る
角部受熱パネル15を設ける。該角部受熱パネル15は
炉壁管16を受熱フィン17で連結したものであり、前
記壁面2と同構造である。前記角部受熱パネル15の背
面側(反炉内側)にはロックウール、グラスウール等の
保温材18を設ける。
A corner heat receiving panel 15 is provided to extend over a corner between adjacent wall surfaces 2. The corner heat receiving panel 15 is formed by connecting a furnace wall tube 16 with heat receiving fins 17 and has the same structure as the wall surface 2. On the back side (inside of the furnace) of the corner heat receiving panel 15, a heat insulating material 18 such as rock wool or glass wool is provided.

【0013】前記角部受熱パネル15、保温材18を設
けることで角部受熱パネル15を斜辺とする3角形の他
の2辺を構成する壁面2,2の隅部分即ち降水パネル1
9,19が前記角部受熱パネル15、保温材18により
火炉1内部より物理的に又熱的に遮断される。前記降水
パネル19に含まれる炉壁管3は降水管20として機能
する。従来設けられていた降水管9は省略する。従っ
て、前記降水管20の流路断面積の総和が少なくとも従
来の降水管9の流路断面積の総和と等しくなる様に前記
降水管20の数、降水管20の内径を設定する。
By providing the corner heat receiving panel 15 and the heat insulating material 18, the corners of the wall surfaces 2, 2 constituting the other two sides of the triangle having the corner heat receiving panel 15 as the hypotenuse, ie, the rain panel 1.
9 and 19 are physically and thermally shielded from the inside of the furnace 1 by the corner heat receiving panel 15 and the heat insulating material 18. The furnace wall tube 3 included in the rain panel 19 functions as a down tube 20. The downcomer 9 conventionally provided is omitted. Therefore, the number of the downcomers 20 and the inner diameter of the downcomers 20 are set so that the total of the cross-sectional areas of the downcomers 20 is at least equal to the total of the cross-sectional areas of the downcomers 9 in the related art.

【0014】前記角部受熱パネル15の炉壁管16は、
前記壁面2の炉壁管3と同様上部が上部管寄せ7を介し
て気水分離ドラム4に連通され、下端は下部管寄せ8を
介して前記降水管20に連通する。
The furnace wall tube 16 of the corner heat receiving panel 15 is
Like the furnace wall tube 3 of the wall surface 2, the upper part communicates with the steam separator drum 4 via the upper header 7, and the lower end communicates with the downcomer pipe 20 via the lower header 8.

【0015】又、前記降水管20の上端部は前記気水分
離ドラム4の液部5に連通され、下端部は前記下部管寄
せ8に連通される。
The upper end of the downcomer 20 is communicated with the liquid part 5 of the steam separator 4, and the lower end is communicated with the lower header 8.

【0016】上記角部受熱パネル15を設けたことで、
2つの降水パネル19で受熱していたものが角部受熱パ
ネル15で受熱することになる為、角部受熱パネル15
で形成される3角形状が直角2等辺3角形であるとする
と受熱面積は略70%に減少する。ところが、従来隅部
の炉壁管3は蒸発管としての能力は低く、又角部受熱パ
ネル15としたことで、角部受熱パネル15自体は炉内
からの熱を受け易くなり、角部受熱パネル15の蒸発能
力としては70%迄減少することはない。又、受熱面積
を確保する為には壁面2の水平長を長くすればよく、長
くした寸法は火炉1全体から見ると殆ど問題とならない
程度のものである。
By providing the corner heat receiving panel 15,
Since the heat received by the two precipitation panels 19 is received by the corner heat receiving panel 15, the corner heat receiving panel 15 is received.
Is assumed to be a right-angled isosceles triangle, the heat receiving area is reduced to approximately 70%. However, the conventional furnace wall tube 3 at the corner has a low capability as an evaporating tube, and the corner heat receiving panel 15 makes the corner heat receiving panel 15 itself more susceptible to heat from inside the furnace. The evaporation capacity of the panel 15 does not decrease to 70%. Further, in order to secure the heat receiving area, the horizontal length of the wall surface 2 may be increased, and the increased dimension is such that there is almost no problem when viewed from the furnace 1 as a whole.

【0017】尚、図1中22はバックステーであり、前
記壁面2に作用する内圧等を支持する強度部材である。
In FIG. 1, reference numeral 22 denotes a back stay, which is a strength member for supporting an internal pressure or the like acting on the wall surface 2.

【0018】以下、作用について説明する。The operation will be described below.

【0019】上記した様に、炉内からの熱は前記角部受
熱パネル15、保温材18により遮断され、前記降水パ
ネル19,19は炉内から直接過熱されることはない。
As described above, the heat from the inside of the furnace is cut off by the corner heat receiving panel 15 and the heat insulating material 18, and the precipitation panels 19, 19 are not directly heated from inside the furnace.

【0020】前記炉壁管16を上昇するボイラ水は前記
分離部6で気水分離され、分離された蒸気は天井壁12
を流通して図示しない過熱器に送出される(図3参
照)。
The boiler water rising in the furnace wall tube 16 is separated into steam and water in the separation section 6, and the separated steam is separated from the ceiling wall 12.
And sent to a superheater (not shown) (see FIG. 3).

【0021】気水分離で分離された加温水は液部5に貯
留し、前記降水管20を経て降下し、下部管寄せ8を経
て前記炉壁管3を上昇して循環する。
The heated water separated by the steam separation is stored in the liquid part 5, descends through the downcomer 20, and rises and circulates through the lower wall 8 through the furnace wall tube 3.

【0022】前記降水管20を降下する温水は炉内から
の熱が遮断されているが、循環するボイラ水は全体とし
て飽和水であるので、前記降水管20を降下するボイラ
水の温度と前記炉壁管16、炉壁管3を上昇するボイラ
水の温度とは温度差はなく、降水パネル19と壁面2、
角部受熱パネル15とは連続しているが境界部に於いて
熱応力等の熱的負荷は発生しない。
Although the heat from the furnace is cut off from the hot water flowing down the downcomer 20, the circulating boiler water is saturated water as a whole. There is no temperature difference from the temperature of the boiler water rising through the furnace wall tube 16 and the furnace wall tube 3, and the rain panel 19 and the wall surface 2,
Although it is continuous with the corner heat receiving panel 15, no thermal load such as thermal stress occurs at the boundary.

【0023】而して、従来の様に降水管9を別途設ける
必要がないので、設置スペースが少なくて済み、バー
ナ、支持鉄骨等他の構造物との取合いを考慮する必要が
なく、構造が簡潔となり、更に、従来の降水管9に比し
小さな配管でよいので肉厚が薄くてよく、重量の軽減が
可能となる。
Since there is no need to separately provide the downcomer 9 as in the prior art, the installation space is small, and there is no need to consider the connection with other structures such as a burner and a supporting steel frame. It is simpler, and furthermore, a smaller pipe may be used as compared with the conventional downcomer 9, so that the wall thickness may be thinner and the weight may be reduced.

【0024】尚、角部受熱パネル15は4隅に設ける必
要はなく、温水の降下水量に見合った流量を確保できれ
ばよいので、3隅でも、2隅であってもよい。更に、降
水管20と炉壁管3とは必ずしも同一寸法である必要は
ない。
The corner heat receiving panel 15 does not need to be provided at four corners, but may be provided at three corners or at two corners, as long as it can secure a flow rate corresponding to the amount of hot water falling. Furthermore, the downcomer 20 and the furnace wall tube 3 do not necessarily have to have the same dimensions.

【0025】[0025]

【発明の効果】以上述べた如く本発明によれば、降水管
を別途設ける必要がなく、従って設置スペースが少なく
て済み、バーナ、支持鉄骨等他の構造物との取合いを考
慮する必要がなく、構造が簡潔となり、更に、従来の降
水管9に比し小さな配管でよいので肉厚が薄くてよく、
重量の軽減が可能となるという優れた効果を発揮する。
As described above, according to the present invention, there is no need to separately provide a downcomer, so that the installation space is reduced, and there is no need to consider the connection with other structures such as burners and supporting steel frames. , The structure is simple, and the pipe may be smaller than the conventional downcomer 9 so that the wall thickness may be thinner.
It has an excellent effect that the weight can be reduced.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施の形態を示す要部斜視図である。FIG. 1 is a perspective view of a main part showing an embodiment of the present invention.

【図2】同前本発明の実施の形態を示す部分平面図であ
る。
FIG. 2 is a partial plan view showing the embodiment of the present invention.

【図3】従来例を示す説明図である。FIG. 3 is an explanatory diagram showing a conventional example.

【符号の説明】[Explanation of symbols]

1 火炉 2 壁面 3 炉壁管 4 気水分離ドラム 15 角部受熱パネル 16 炉壁管 18 保温材 19 降水パネル 20 降水管 DESCRIPTION OF SYMBOLS 1 Furnace 2 Wall surface 3 Furnace wall tube 4 Steam separator drum 15 Corner heat receiving panel 16 Furnace wall tube 18 Heat insulation material 19 Rainfall panel 20 Rainfall tube

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 炉壁管によって壁面が形成される火炉の
隅部に、斜めに角部受熱パネルを設け、該角部受熱パネ
ルによって遮蔽された隅部の炉壁管を気水分離ドラムの
液部に連通して降水管として使用したことを特徴とする
循環形ボイラの降水管構造。
At least one corner heat receiving panel is provided diagonally at a corner of a furnace where a wall surface is formed by a furnace wall tube, and the furnace wall tube at a corner shielded by the corner heat receiving panel is connected to a steam separator drum. A downcomer structure of a circulation boiler, characterized in that it is used as a downcomer in communication with the liquid part.
【請求項2】 前記角部受熱パネルが炉壁管を連設して
構成され、背面側に保温材を設けた請求項1の循環形ボ
イラの降水管構造。
2. The downcomer structure of a circulation type boiler according to claim 1, wherein said corner heat receiving panel is constituted by connecting furnace wall tubes in series, and a heat insulating material is provided on the back side.
JP11182134A 1999-06-28 1999-06-28 Downcast pipe structure for circulating type boiler Pending JP2001012702A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11182134A JP2001012702A (en) 1999-06-28 1999-06-28 Downcast pipe structure for circulating type boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11182134A JP2001012702A (en) 1999-06-28 1999-06-28 Downcast pipe structure for circulating type boiler

Publications (1)

Publication Number Publication Date
JP2001012702A true JP2001012702A (en) 2001-01-19

Family

ID=16112942

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11182134A Pending JP2001012702A (en) 1999-06-28 1999-06-28 Downcast pipe structure for circulating type boiler

Country Status (1)

Country Link
JP (1) JP2001012702A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003074802A (en) * 2001-09-05 2003-03-12 Hirakawa Guidom:Kk Water tube boiler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003074802A (en) * 2001-09-05 2003-03-12 Hirakawa Guidom:Kk Water tube boiler

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