JPS61119902A - steam generator - Google Patents
steam generatorInfo
- Publication number
- JPS61119902A JPS61119902A JP23842384A JP23842384A JPS61119902A JP S61119902 A JPS61119902 A JP S61119902A JP 23842384 A JP23842384 A JP 23842384A JP 23842384 A JP23842384 A JP 23842384A JP S61119902 A JPS61119902 A JP S61119902A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- steam generator
- flow rate
- heat exchanger
- tube sheet
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/06—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits having a single U-bend
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、特に管板上部の二次媒体流量分布に好適な蒸
気発生器に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a steam generator particularly suitable for secondary medium flow rate distribution above a tube plate.
管板上部二次媒体流量分布を改善する方法に、特開昭５
７−１４２４０１の円筒ジャケット構造変更及び特開昭
５８−２８４８１の流量分配板があるが、管板の構造に
ついては配慮がなかった。Japanese Unexamined Patent Publication No. 5
Although there is a modification of the cylindrical jacket structure in No. 7-142401 and a flow distribution plate in JP-A-58-28481, no consideration was given to the structure of the tube plate.
本発明の目的は、管板上部二次媒体流量分布を改善し、
熱効率を向上させた蒸気発生器を提供することにある。The purpose of the present invention is to improve the secondary medium flow distribution in the upper part of the tubesheet,
An object of the present invention is to provide a steam generator with improved thermal efficiency.
本発明は、管板上部を段付構造とすることによυ、一次
媒体高温側と低温側の管板上部二次媒体流量分布を改善
し上記目的を達成しようとするものである。The present invention aims to achieve the above object by providing a stepped structure in the upper part of the tube plate to improve the flow rate distribution of the secondary medium in the upper part of the tube plate on the high temperature side and the low temperature side of the primary medium.
以下、本発明の実施例を図面を用いて説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図について説明すると、Ｕ字形伝熱管１は管板４に
接続され、一次媒体流路を形成している。Referring to FIG. 1, a U-shaped heat exchanger tube 1 is connected to a tube plate 4 to form a primary medium flow path.
また、前記管板４は円筒胴２にも接続され、二次媒体を
内包している。この二次媒体は、前記円筒胴２と前記円
筒胴２の内側に設けられた円筒状ジャケット５の間に区
画された外側降水室３を下降する。前記円筒状ジャケッ
ト５は、前記管板４まで達しておらず、二次媒体は、こ
れら前記円筒状ジャケット５と前記管板４のすき間より
方向を中心に変え流入し、その後前記円筒ジャケット５
の内側を上昇する。この場合前記管板４は段付構造であ
り、前記円筒状ジャケット５と前記管板４とのすき間高
さに比例した二次媒体流量分布となる。The tube plate 4 is also connected to the cylindrical body 2 and contains a secondary medium therein. This secondary medium descends through an outer precipitation chamber 3 defined between the cylindrical body 2 and a cylindrical jacket 5 provided inside the cylindrical body 2. The cylindrical jacket 5 does not reach the tube sheet 4, and the secondary medium changes direction and flows into the gap between the cylindrical jacket 5 and the tube sheet 4, and then flows into the cylindrical jacket 5.
rise inside. In this case, the tube sheet 4 has a stepped structure, and the secondary medium flow rate distribution is proportional to the height of the gap between the cylindrical jacket 5 and the tube sheet 4.
本実施例によれば、管板４上部への二次媒体流量分布は
、前記円筒状ジャケット５と前記管板４のすき間高さに
比例し、一次媒体高温側の方が大きくなる。前記管板４
上部の段の高さは、計算及び実験により詳細を決定する
ことができ、これにより熱効率上適した流量分布を得る
。According to this embodiment, the secondary medium flow rate distribution to the upper part of the tube sheet 4 is proportional to the height of the gap between the cylindrical jacket 5 and the tube sheet 4, and is larger on the high temperature side of the primary medium. Said tube plate 4
The height of the upper stage can be determined in detail through calculation and experiment, thereby obtaining a flow rate distribution suitable for thermal efficiency.
第２図は、本発明の他の実施例を示すもので、第１図と
同一部分は同一符号で示す。第１図と異なる点は、管板
４上部に直径方向の溝６を設けたことにある。このよう
にすることによって前記管板４の中心部への二次媒体流
量が増加し、前記Ｕ字形伝熱管１束の外周全体より二次
媒体を流入させることができる。これにより熱効率上最
適である均一な流量分布を得る。FIG. 2 shows another embodiment of the present invention, in which the same parts as in FIG. 1 are designated by the same reference numerals. The difference from FIG. 1 is that a diametrical groove 6 is provided in the upper part of the tube plate 4. By doing so, the flow rate of the secondary medium to the center of the tube plate 4 is increased, and the secondary medium can be caused to flow from the entire outer periphery of the bundle of U-shaped heat exchanger tubes. This provides a uniform flow rate distribution that is optimal in terms of thermal efficiency.
本発明によれば、管板上部の二次媒体の流量分配及び流
量分布を最適にとることができ、その蒸気発生器のもつ
最大の効率を得ることができる。According to the present invention, the flow rate distribution and flow rate distribution of the secondary medium above the tube plate can be optimized, and the maximum efficiency of the steam generator can be obtained.
さらに、流路断面ｆｉｔを絞ることによって、流量分配
や流量分布の改善を行っていないため、圧力損失が少な
く給水ポンプ容量の低減が可能である。Furthermore, since the flow rate distribution and flow rate distribution are not improved by narrowing the flow path cross section fit, the pressure loss is small and the capacity of the water supply pump can be reduced.
第１図は蒸気発生器の実施例の下部概略縦断面図、第２
図は他の実施例の下部概略縦断面図である。
１・・・Ｕ字形伝熱管、２・・・円筒状ケーシング、３
・・・外側降水室、４・・・管板、５・・・円筒状ジャ
ケット、１０茅（の
令２０Figure 1 is a schematic vertical cross-sectional view of the lower part of an embodiment of the steam generator;
The figure is a schematic vertical sectional view of the lower part of another embodiment. 1... U-shaped heat exchanger tube, 2... Cylindrical casing, 3
...Outer precipitation chamber, 4...Tube plate, 5...Cylindrical jacket, 10 bamboo (20 years old)
Claims (1)
管の束を取囲み外側の円筒胴との間に二次媒体のための
外側降水室を画成し、かつ管板までには達していない円
筒状ジャケットとを有し、前記Ｕ字形伝熱管の両脚部が
それぞれ前記管板に接続されたものにおいて、この管板
上部を段付構造としたことを特徴とする蒸気発生器。1. An outer precipitation chamber for the secondary medium is defined between the U-shaped heat exchanger tubes guiding the primary medium and the outer cylindrical shell surrounding the bundle of U-shaped heat exchanger tubes, and up to the tube sheet. 1. A steam generator having a cylindrical jacket that does not reach the top of the tube, wherein both legs of the U-shaped heat exchanger tube are connected to the tube sheet, wherein the upper portion of the tube sheet has a stepped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23842384A JPS61119902A (en) | 1984-11-14 | 1984-11-14 | steam generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23842384A JPS61119902A (en) | 1984-11-14 | 1984-11-14 | steam generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61119902A true JPS61119902A (en) | 1986-06-07 |
Family
ID=17029984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23842384A Pending JPS61119902A (en) | 1984-11-14 | 1984-11-14 | steam generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61119902A (en) |
-
1984
- 1984-11-14 JP JP23842384A patent/JPS61119902A/en active Pending
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