JPH05154307A - Degassing device - Google Patents
Degassing deviceInfo
- Publication number
- JPH05154307A JPH05154307A JP32545391A JP32545391A JPH05154307A JP H05154307 A JPH05154307 A JP H05154307A JP 32545391 A JP32545391 A JP 32545391A JP 32545391 A JP32545391 A JP 32545391A JP H05154307 A JPH05154307 A JP H05154307A
- Authority
- JP
- Japan
- Prior art keywords
- steam
- water
- tank
- degassing
- water supply
- 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
Landscapes
- Degasification And Air Bubble Elimination (AREA)
- Physical Water Treatments (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は発電プラントのボイラ給
水系統に組み込んで使用する脱気装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deaerator used by being incorporated in a boiler water supply system of a power plant.
【０００２】[0002]
【従来の技術】一般に、発電プラントではボイラへの給
水中にその溶存ガス（酸素Ｏ2 ，二酸化炭素ＣＯ2 な
ど）によってボイラおよび配管類の腐食を防止するため
脱気装置を使用している。この脱気装置を使用すること
により、物理的な方法で給水中の溶存ガスを取り除くこ
とができる。2. Description of the Related Art Generally, in a power plant, a deaerator is used to prevent corrosion of a boiler and piping due to dissolved gas (oxygen O 2 , carbon dioxide CO 2, etc.) in water supplied to the boiler. By using this deaerator, the dissolved gas in the feed water can be removed by a physical method.
【０００３】従来の脱気装置の縦断面図を図８に示す。
この脱気装置１は脱気室２を形成した脱気槽３と、貯水
タンク４と、これらを接続する連結管５，６とから大略
構成されている。脱気槽３は貯水タンク４の上部に位置
し、脱気槽３の内部には多数の脱気トレイ７、給水スプ
レー８および蒸気供給管９を配設している。また、貯水
タンク４の内部にも蒸気供給管１０を設けている。FIG. 8 shows a vertical sectional view of a conventional deaerator.
The deaerator 1 is roughly composed of a deaeration tank 3 having a deaeration chamber 2, a water storage tank 4, and connecting pipes 5 and 6 connecting them. The deaeration tank 3 is located above the water storage tank 4, and a large number of deaeration trays 7, a water supply spray 8 and a steam supply pipe 9 are arranged inside the deaeration tank 3. A steam supply pipe 10 is also provided inside the water storage tank 4.
【０００４】上記の構成において、給水スプレー８から
の給水を脱気室２の内部に噴射することにより、給水を
蒸気供給管９からの加熱蒸気に直接接触させ、給水中の
溶存ガスを脱気する。すなわち、脱気トレイ７上に落下
した給水を下方から上昇する加熱蒸気に直接接触させ、
給水中の溶存ガスを脱気する。脱気処理が行われた給水
は連結管５を通って貯水タンク４に溜まる。この給水は
蒸気供給管１０からの蒸気により再度脱気処理される。
そして、脱気されたガスは連結管６を通って脱気室２内
の上昇気流とともに装置外に排出される（特開昭５９−
２００１０４号公報参照）。In the above structure, by injecting the feed water from the feed water spray 8 into the degassing chamber 2, the feed water is brought into direct contact with the heating steam from the steam supply pipe 9 to degas the dissolved gas in the feed water. To do. That is, the feed water dropped on the degassing tray 7 is directly contacted with the heated steam rising from below,
Degas the dissolved gas in the water supply. The deaerated water supply is stored in the water storage tank 4 through the connecting pipe 5. This water supply is degassed again by the steam from the steam supply pipe 10.
Then, the degassed gas is discharged to the outside of the apparatus through the connecting pipe 6 together with the ascending airflow in the degassing chamber 2 (JP-A-59-59).
See Japanese Patent Publication No. 200104).
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記従
来の脱気装置において蒸気供給管１０から噴出した蒸気
は、貯水タンク４内の給水中を単純に上昇するだけであ
るから、給水中での蒸気の滞留時間は短い。また、蒸気
による給水の撹拌作用も小さい。さらに、蒸気と給水と
の気液界面の更新も少ない。したがって、単に蒸気を給
水中に噴出しただけでは、給水を十分に脱気処理する上
で問題がある。However, since the steam ejected from the steam supply pipe 10 in the above conventional deaerator simply rises in the feed water in the water storage tank 4, the steam in the feed water is increased. Has a short residence time. Moreover, the action of stirring the feed water by steam is also small. Further, the renewal of the gas-liquid interface between steam and water supply is small. Therefore, there is a problem in sufficiently degassing the water supply by simply ejecting steam into the water supply.
【０００６】反面、脱気処理性能を高めようとすると、
上部の脱気室２を大型化する必要がある。その結果、脱
気装置全体が大型化し、その設置面積も広くなり、装置
の製造コストも上昇する問題点がある。On the other hand, when trying to improve degassing performance,
It is necessary to increase the size of the upper deaeration chamber 2. As a result, there is a problem that the entire degassing device becomes large in size, its installation area becomes large, and the manufacturing cost of the device increases.
【０００７】本発明は上述した事情を考慮してなされた
もので、小型で脱気処理性能が高く、ボイラおよび配管
類の腐食を防ぐことのできる脱気装置を提供することを
目的とする。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a deaerator which is small in size, has high deaerating performance, and can prevent corrosion of a boiler and pipes.
【０００８】[0008]
【課題を解決するための手段】本発明に係る脱気装置
は、上述した課題を解決するために、タンク内の給水中
に蒸気を噴出する蒸気管を備えた脱気装置において、上
記タンク内で蒸気管の設置位置以上であって給水の設定
水位以下の位置に給水を攪拌させる蒸気拡散手段を設け
たものである。In order to solve the above-mentioned problems, the deaerator according to the present invention is a deaerator equipped with a steam pipe for injecting steam into the feed water in the tank. The steam diffusion means for stirring the water supply is provided at a position above the installation position of the steam pipe and below the set water level of the water supply.
【０００９】[0009]
【作用】上記の構成を有する本発明において、タンク内
の給水に噴出した蒸気は、タンク内の給水中に設けられ
た蒸気拡散手段によりその上昇経路が邪魔され拡散す
る。すると、給水中の蒸気の滞留時間が長くなり、蒸気
による給水の撹拌作用も促進される。さらに、蒸気が蒸
気拡散手段に拡散されつつ上昇することにより、気液界
面が一層更新される。このようにして、給水と蒸気とが
十分混合することになる。In the present invention having the above-mentioned structure, the steam jetted into the water supply in the tank is diffused by the ascending path of the steam being disturbed by the vapor diffusion means provided in the water supply in the tank. Then, the residence time of the steam in the feed water becomes long, and the stirring action of the feed water by the steam is promoted. Furthermore, the vapor-liquid interface is further renewed by the vapor rising while being diffused in the vapor diffusion means. In this way, the water supply and the steam are well mixed.
【００１０】[0010]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１１】図１は本発明に係る脱気装置１１の第１実
施例を示す縦断面図である。なお、従来の構成と同一ま
たは対応する部分には図８と同一の符号を用いて説明す
る。本実施例の脱気装置１１は脱気室２を形成した脱気
槽３と、貯水タンク４と、これらを接続する連結管５，
６とから大略構成されている。なお、脱気槽３は図８に
示す脱気槽３と同一の構造を有するのでその説明を省略
する。貯水タンク４の内部には蒸気供給管１０および蒸
気拡散手段１４として複数の邪魔板１５が給水に埋没す
るように配設されている。すなわち、この邪魔板１５は
貯水タンク４内で蒸気供給管１０の設置位置Ａ以上であ
って給水の設定水位Ｂ以下の位置に配設されたパンチン
グプレートであり、図２に示すように複数の孔１６が千
鳥足状に穿設されている。複数の邪魔板１５はそれぞれ
孔１６の垂直方向の位置が異なるように所定間隔をおい
て多段に配置されている。ここで、邪魔板１５は図１に
おいて水平に設置しているが、斜めに設置してもよい。
次に、本実施例の作用について説明する。FIG. 1 is a vertical sectional view showing a first embodiment of a deaerator 11 according to the present invention. It should be noted that parts that are the same as or correspond to those of the conventional configuration will be described using the same symbols as in FIG. The deaerator 11 of the present embodiment includes a deaeration tank 3 having a deaeration chamber 2, a water storage tank 4, and a connecting pipe 5 connecting them.
It is composed of 6 and 6. Since the degassing tank 3 has the same structure as the degassing tank 3 shown in FIG. 8, its description is omitted. Inside the water storage tank 4, a plurality of baffle plates 15 are arranged as the steam supply pipe 10 and the steam diffusion means 14 so as to be buried in the water supply. That is, the baffle plate 15 is a punching plate disposed in the water storage tank 4 at a position higher than the installation position A of the steam supply pipe 10 and lower than the set water level B of the water supply, and as shown in FIG. The holes 16 are staggered. The plurality of baffle plates 15 are arranged in multiple stages at predetermined intervals so that the holes 16 have different vertical positions. Here, although the baffle plate 15 is installed horizontally in FIG. 1, it may be installed obliquely.
Next, the operation of this embodiment will be described.
【００１２】脱気槽３内の脱気室２において脱気され、
連結管５を通って貯水タンク４に溜まった給水１７は、
蒸気供給管１０から吹き出された蒸気によって再度脱気
される。この時、蒸気は図８のように直線的に上昇する
のではなく、蒸気拡散手段１４の邪魔板１５に沿って移
動し、その多くは孔１６を通り上部に設置した別の邪魔
板１５に達する。蒸気は同様の上昇移動を繰り返しつ
つ、給水１７を脱気しながら水面まで達する。そして、
蒸気と脱気された溶存ガスは連結管６を通って脱気室２
へ移動した後、脱気室２内の上昇気流とともに脱気槽３
外に排出される。このように本実施例によれば、蒸気の
給水における滞留時間は格段に長くなり、蒸気による給
水の撹拌作用も促進される。さらに、孔１６を通ること
により気液界面が更新される。このようにして、給水と
蒸気とが十分混合することになる。Deaeration is performed in the deaeration chamber 2 in the deaeration tank 3,
The water supply 17 accumulated in the water storage tank 4 through the connecting pipe 5 is
It is degassed again by the steam blown out from the steam supply pipe 10. At this time, the steam does not rise linearly as shown in FIG. 8 but moves along the baffle plate 15 of the vapor diffusion means 14, and most of them pass through the hole 16 to another baffle plate 15 installed at the upper part. Reach The steam reaches the water surface while deaerating the water supply 17 while repeating the same upward movement. And
The steam and the degassed dissolved gas pass through the connecting pipe 6 and the degassing chamber 2
After moving to the degassing chamber 3 together with the rising air flow in the degassing chamber 2.
It is discharged outside. As described above, according to this embodiment, the residence time of the steam in the water supply is remarkably long, and the stirring action of the water supply by the steam is promoted. Furthermore, the gas-liquid interface is updated by passing through the hole 16. In this way, the water supply and the steam are well mixed.
【００１３】次に、第２〜第５実施例について図３〜図
７に基づいて説明する。これらの実施例の第１実施例と
異なるところは貯水タンク４の内部に設けた蒸気拡散手
段としての邪魔板の形状であって、給水の脱気方法や効
果は第１実施例に示したものと同一であるのでその説明
を省略する。Next, second to fifth embodiments will be described with reference to FIGS. The difference between these embodiments and the first embodiment is the shape of the baffle as the vapor diffusion means provided inside the water storage tank 4, and the degassing method and effects of the water supply are those shown in the first embodiment. Since it is the same as the above, its explanation is omitted.
【００１４】図３および図４は本発明に係る脱気装置の
第２実施例を示す。本実施例では蒸気拡散手段２０とし
ての邪魔板２１にはプレスにより切り起し成形した断面
台形状の凸部２２を多数千鳥足状に設けている。したが
って、凸部２２の下部には空間２３が形成される。この
空間２３を蒸気が通過することになる。FIGS. 3 and 4 show a second embodiment of the deaerator according to the present invention. In this embodiment, the baffle plate 21 as the vapor diffusion means 20 is provided with a large number of zigzag-shaped projections 22 having a trapezoidal cross section that is cut and raised by pressing. Therefore, a space 23 is formed below the convex portion 22. Steam will pass through this space 23.
【００１５】図５は本発明に係る脱気装置の第３実施例
を示す。本実施例では蒸気拡散手段２５を構成する邪魔
板２６はプレート状の平板２７と半円筒状あるいは弧状
の湾曲板２８とを組み合せて接合したもので、各平板２
７や湾曲板２８にそれぞれ複数の孔２７ａや２８ａが穿
設されている。このような邪魔板２１を湾曲板２８の垂
直方向の位置が異なるように複数枚重ねて貯水タンク４
の内部に設置する。したがって、蒸気は孔２７ａおよび
２８ａをそれぞれ通過して上昇することになる。FIG. 5 shows a third embodiment of the deaerator according to the present invention. In the present embodiment, the baffle plate 26 constituting the vapor diffusion means 25 is a plate-shaped flat plate 27 and a semi-cylindrical or arc-shaped curved plate 28 combined and joined together.
7 and the curved plate 28 are provided with a plurality of holes 27a and 28a, respectively. A plurality of such baffles 21 are stacked so that the vertical position of the curved plate 28 is different, and the water tank 4
Installed inside the. Therefore, the vapor passes through the holes 27a and 28a and rises.
【００１６】図６は本発明に係る脱気装置の第４実施例
を示す。本実施例では蒸気拡散手段３０としての邪魔板
３１は複数の細長い板３１を格子状に組み付けて作成す
る。したがって、蒸気は格子の隙間を通過することにな
る。ここで、邪魔板３０は図６において板を格子状に組
み付けて作成したが、棒を格子状に組み付けてもよい。FIG. 6 shows a fourth embodiment of the deaerator according to the present invention. In the present embodiment, the baffle plate 31 as the vapor diffusion means 30 is formed by assembling a plurality of elongated plates 31 in a grid pattern. Therefore, the vapor will pass through the gaps in the grid. Here, the baffle plate 30 is made by assembling the plates in a grid shape in FIG. 6, but the bars may be assembled in a grid shape.
【００１７】図７は本発明に係る脱気装置の第５実施例
を示す。本実施例では蒸気拡散手段３３としての邪魔板
３４には金属製の目の細かい網３５が張設されている。
したがって、蒸気はこの網３５の目を通過して上昇する
ことになる。FIG. 7 shows a fifth embodiment of the deaerator according to the present invention. In this embodiment, a metal mesh 35 is stretched on the baffle plate 34 as the vapor diffusion means 33.
Therefore, the vapor passes through the mesh of the net 35 and rises.
【００１８】[0018]
【発明の効果】以上説明したように、本発明に係る脱気
装置によれば、タンク内で蒸気管の設置位置以上であっ
て給水の設定水位以下の位置に給水を攪拌させる蒸気拡
散手段を設け、タンク内の給水中に蒸気管により噴出さ
れる蒸気を蒸気拡散手段で拡散させつつ上昇させること
により、給水中における蒸気の滞留時間を長くでき、蒸
気による給水の撹拌作用を積極的に促進させることがで
きる。さらに、蒸気が蒸気拡散手段で拡散されつつ上昇
することにより、気液界面が更新され、給水と蒸気とが
十分混合される。その結果、脱気処理性能が格段と高
い、小型の脱気装置を提供することができるという効果
を有する。As described above, according to the deaerator according to the present invention, the vapor diffusing means for stirring the feed water is provided in the tank above the installation position of the steam pipe and below the set water level of the feed water. Provided, the steam jetted by the steam pipe into the water supply in the tank is diffused and raised by the steam diffusion means, so that the residence time of the steam in the water supply can be lengthened and the stirring action of the water supply by the steam is positively promoted. Can be made Further, the vapor rises while being diffused by the vapor diffusing means, so that the gas-liquid interface is renewed and the feed water and the vapor are sufficiently mixed. As a result, there is an effect that it is possible to provide a small-sized deaerator having a significantly high deaerating performance.
【図１】本発明に係る脱気装置の第１実施例を示す縦断
面図。FIG. 1 is a longitudinal sectional view showing a first embodiment of a deaerator according to the present invention.
【図２】第１実施例における邪魔板を示す平面図。FIG. 2 is a plan view showing a baffle plate in the first embodiment.
【図３】本発明に係る脱気装置の第２実施例おける邪魔
板を示す平面図。FIG. 3 is a plan view showing a baffle plate in a second embodiment of the deaerator according to the present invention.
【図４】第２実施例おける邪魔板の凸部を示す部分断面
図。FIG. 4 is a partial sectional view showing a convex portion of a baffle plate in a second embodiment.
【図５】本発明に係る脱気装置の第３実施例おける邪魔
板を示す正面断面図。FIG. 5 is a front sectional view showing a baffle plate in a third embodiment of the deaerator according to the present invention.
【図６】本発明に係る脱気装置の第４実施例おける邪魔
板を示す平面図。FIG. 6 is a plan view showing a baffle plate in a fourth embodiment of the deaerator according to the present invention.
【図７】本発明に係る脱気装置の第５実施例おける邪魔
板を示す平面図。FIG. 7 is a plan view showing a baffle plate in a fifth embodiment of the deaerator according to the present invention.
【図８】従来の脱気装置を示す縦断面図。FIG. 8 is a vertical cross-sectional view showing a conventional deaerator.
１ 脱気装置 ２ 脱気室 ３ 脱気槽 ４ 貯水タンク ５，６ 連結管 ７ 脱気トレイ ８ 給水スプレー ９ 蒸気供給管 １０ 蒸気供給管 １１ 脱気装置 １４，２０，２５，３０，３３ 蒸気拡散手段 １５，２１，２６，３１，３４ 邪魔板 １６ 孔 １７ 給水 1 Deaeration device 2 Deaeration chamber 3 Deaeration tank 4 Water storage tank 5,6 Connection pipe 7 Deaeration tray 8 Water supply spray 9 Steam supply pipe 10 Steam supply pipe 11 Deaeration device 14, 20, 25, 30, 33 Steam diffusion Means 15, 21, 26, 31, 34 Baffle plate 16 Hole 17 Water supply
フロントページの続き (72)発明者 佐藤 健二 神奈川県横浜市鶴見区末広町２丁目４番地 株式会社東芝京浜事業所内 (72)発明者 中島 昌二 神奈川県横浜市鶴見区末広町２丁目４番地 株式会社東芝京浜事業所内Front page continuation (72) Kenji Sato, 2-4 Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Toshiba Keihin Office, Inc. (72) Shoji Nakajima 2-4, Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Toshiba Keihin Office
Claims (1)
管を備えた脱気装置において、上記タンク内で蒸気管の
設置位置以上であって給水の設定水位以下の位置に給水
を攪拌させる蒸気拡散手段を設けたことを特徴とする脱
気装置。1. A deaerator equipped with a steam pipe for injecting steam into the feed water in a tank, wherein the feed water is agitated at a position above the installation position of the steam pipe and below the set water level of the feed water in the tank. A degassing device provided with a vapor diffusion means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32545391A JPH05154307A (en) | 1991-12-10 | 1991-12-10 | Degassing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32545391A JPH05154307A (en) | 1991-12-10 | 1991-12-10 | Degassing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05154307A true JPH05154307A (en) | 1993-06-22 |
Family
ID=18177038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32545391A Pending JPH05154307A (en) | 1991-12-10 | 1991-12-10 | Degassing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05154307A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000130937A (en) * | 1998-10-23 | 2000-05-12 | Masutani Seiko Kk | Chemical processing apparatus |
| CN106474773A (en) * | 2015-09-01 | 2017-03-08 | 斗山重工业株式会社 | Degasser |
-
1991
- 1991-12-10 JP JP32545391A patent/JPH05154307A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000130937A (en) * | 1998-10-23 | 2000-05-12 | Masutani Seiko Kk | Chemical processing apparatus |
| CN106474773A (en) * | 2015-09-01 | 2017-03-08 | 斗山重工业株式会社 | Degasser |
| EP3153792A1 (en) * | 2015-09-01 | 2017-04-12 | Doosan Heavy Industries & Construction Co., Ltd. | Deaerator |
| US10605533B2 (en) | 2015-09-01 | 2020-03-31 | DOOSAN Heavy Industries Construction Co., LTD | Deaerator |
| CN106474773B (en) * | 2015-09-01 | 2020-08-04 | 斗山重工业株式会社 | Degasser |
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