JPH02206799A - Air cooler - Google Patents
Air coolerInfo
- Publication number
- JPH02206799A JPH02206799A JP1028043A JP2804389A JPH02206799A JP H02206799 A JPH02206799 A JP H02206799A JP 1028043 A JP1028043 A JP 1028043A JP 2804389 A JP2804389 A JP 2804389A JP H02206799 A JPH02206799 A JP H02206799A
- Authority
- JP
- Japan
- Prior art keywords
- duct
- air
- injection nozzle
- dry air
- heat exchanger
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は液体金属冷却型高速増殖炉に用いられる空気冷
却器に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an air cooler used in a liquid metal cooled fast breeder reactor.
（従来の技術）
従来、この種の空気冷却器は炉心の崩壊熱を除去する補
助炉心冷却装置として使用され、第２図に示すように入
口ヘッダ−１及び出口ヘッダ−３を介して高温の冷却材
（液体金属）９が出入りする伝熱管２を冷却用の空気ｌ
Ｏが流れるダクト４内に配置し、伝熱管２内を流れる冷
却材９を空気ｌＯとの熱交換により冷却する構造となり
でいる。(Prior Art) Conventionally, this type of air cooler has been used as an auxiliary core cooling device to remove decay heat from the core, and as shown in FIG. Air l is used to cool the heat exchanger tube 2 through which the coolant (liquid metal) 9 enters and exits.
It is arranged in a duct 4 through which O flows, and has a structure in which the coolant 9 flowing in the heat exchanger tube 2 is cooled by heat exchange with air lO.
そして、上記ダクト４の入口部及び出口部には閉止用の
人口ダンパー５および出口ダンパー６が設けられ、さら
にダクト４の入口部には冷却用空気ｌＯをダクト４内に
送風するブロワ−７が設置されている。なお、伝熱管２
の外表面には伝熱効率を高めるためにフィン８が設けら
れている。A closing artificial damper 5 and an exit damper 6 are provided at the inlet and outlet of the duct 4, and a blower 7 for blowing cooling air lO into the duct 4 is provided at the inlet of the duct 4. is set up. In addition, heat exchanger tube 2
Fins 8 are provided on the outer surface of the tube to increase heat transfer efficiency.
ところで、このような空気冷却器は原子炉の事故時を含
めた最終的な吸熱源であることから、高い信頼性と構造
の健全性が要求される。したがって、高温の冷却材９が
流れる伝熱管２には耐食性に優れたステンレス鋼が使用
されるが、冷却用空気１０に含まれる塩分が伝熱管２の
表面に付着して潮解するとステンレス鋼でも腐食が生じ
易い環境となる。このため、従来では冷却用空気ＩＯの
入口流路に塩分除去フィルターを設置するなどの対策が
取られているが、必ずしも十分な対策とは言えなかった
。そのため、冷却用空気ＩＯに含まれる塩分が塩分除去
フィルターを通過して伝熱管２の表面に付着すると、原
子炉の運転時は伝熱管２の表面温度が冷却材９により約
２００〜４００ ’Ｃの高温に保持されており、また停
止時にも液体金属の凍結を防止するために約２００ ’
Ｃ前後に余熱保持されているため、このような状態では
塩分の潮解は発生しないが、メンテナンス時のように液
体金属をドレンして伝熱管２の表面温度が１００ ’Ｃ
以下に降温する場合には空気中の湿分が伝熱管２の表面
で凝縮するため、伝熱管２の表面に付着した塩分が潮解
し、伝熱管２が腐食し易い環境となっていた。Incidentally, since such an air cooler is the ultimate source of heat absorption including in the event of a nuclear reactor accident, it is required to have high reliability and structural soundness. Therefore, stainless steel with excellent corrosion resistance is used for the heat exchanger tube 2 through which the high-temperature coolant 9 flows, but even stainless steel corrodes when the salt contained in the cooling air 10 adheres to the surface of the heat exchanger tube 2 and deliquesces. This creates an environment where this is likely to occur. For this reason, countermeasures such as installing a salt removal filter in the inlet flow path of the cooling air IO have been conventionally taken, but these measures have not necessarily been sufficient. Therefore, if the salt contained in the cooling air IO passes through the salt removal filter and adheres to the surface of the heat exchanger tube 2, the surface temperature of the heat exchanger tube 2 will rise to approximately 200 to 400'C due to the coolant 9 during nuclear reactor operation. It is maintained at a high temperature of approximately 200' to prevent the liquid metal from freezing even when stopped.
Since residual heat is retained around C, deliquescence of salt does not occur under such conditions.
When the temperature drops below that level, moisture in the air condenses on the surface of the heat exchanger tubes 2, so that the salt adhering to the surface of the heat exchanger tubes 2 deliquesces, creating an environment in which the heat exchanger tubes 2 are likely to corrode.
（発明が解決しようとする課題）
上述の如く、従来の空気冷却器はメンテナンス時のよう
に液体金属をドレンして伝熱管２の表面温度が１００℃
以下に降温する場合、空気中の湿分が伝熱管２の表面で
凝縮し、伝熱管２の表面に付着した塩分を潮解させる問
題があった。(Problems to be Solved by the Invention) As mentioned above, the conventional air cooler drains the liquid metal during maintenance so that the surface temperature of the heat transfer tube 2 reaches 100°C.
When the temperature drops to below, there is a problem in that moisture in the air condenses on the surface of the heat exchanger tube 2, causing salt adhering to the surface of the heat exchanger tube 2 to deliquesce.
本発明はこのような事情に鑑みてなされたもので、その
目的とするところは伝熱管の表面に付着した塩分の潮解
を防止し、信頼性及び健全性を高めるごとのできる空気
冷却器を提供することにある。The present invention has been made in view of the above circumstances, and its purpose is to provide an air cooler that can prevent salt adhering to the surface of heat transfer tubes from deliquescing and improve reliability and soundness. It's about doing.
Ｃ発明の構成］
（課題を解決するための手段）
上記目的を達成するために本発明は、冷却材が流れる伝
熱管を冷却用空気が流れるダクト内に配置し、このダク
トの入口部及び出口部に閉止用のダンパーを設けた空気
冷却器において、上記ダクトに乾燥空気注入ノズルを設
けると共に上記注入ノズルに乾燥空気注入装置を接続し
たことを特徴とするものである。C Structure of the Invention] (Means for Solving the Problem) In order to achieve the above object, the present invention arranges a heat transfer tube through which a coolant flows in a duct through which cooling air flows, and the inlet and outlet of this duct. The air cooler is provided with a damper for closing the air cooler, characterized in that the duct is provided with a dry air injection nozzle and a dry air injection device is connected to the injection nozzle.
（作 用）
本発明においては、伝熱管の温度がｉｏｏ’ｃ以下に降
温する時にダクトに設けられた乾燥空気注入ノズルより
ダクト内に乾燥空気を注入することにより、ダクト内の
空気が乾燥空気に置換されるので、伝熱管の表面に付着
した塩分の潮解を防止できる。(Function) In the present invention, by injecting dry air into the duct from the dry air injection nozzle provided in the duct when the temperature of the heat transfer tube falls below ioo'c, the air in the duct becomes dry air. , it is possible to prevent the salt adhering to the surface of the heat exchanger tube from deliquescing.
（実施例） 以下、本発明の一実施例を第１図を参照して説明する。(Example) An embodiment of the present invention will be described below with reference to FIG.
なお、第１図において第２図に示したものと同一部分に
は同一符号を付し、その部分の説明は省略する。In FIG. 1, the same parts as those shown in FIG. 2 are given the same reference numerals, and explanations of those parts will be omitted.
第１図において、１１はダクト４に設けられた乾燥空気
注入ノズルであり、この注入ノズル１１には配管１２を
介して乾燥空気注入装置１３が接続されている。この乾
燥空気注入装置１３は止め弁１４、乾燥器１５、ブロワ
−１６等から構成されており、外部空気をブロワ−１６
で乾燥器１５へ送風し、乾燥器１５で乾燥された空気を
止め弁１４を介して乾燥空気注入ノズル１１よりダクト
４内に注入するようになっている。In FIG. 1, 11 is a dry air injection nozzle provided in the duct 4, and a dry air injection device 13 is connected to this injection nozzle 11 via a pipe 12. This dry air injection device 13 is composed of a stop valve 14, a dryer 15, a blower 16, etc., and external air is supplied to the blower 16.
The air is blown to the dryer 15, and the air dried in the dryer 15 is injected into the duct 4 from a dry air injection nozzle 11 via a stop valve 14.
このような構成によると、メンテナンス時のように伝熱
管２の表面温度が１００ ’Ｃ以下に降温する場合、伝
熱管２の表面に付着した塩分の潮解を防止することがで
きる。すなわち、メンテナンス時にはまず入口ダンパー
５を全閉し、伝熱管２内の冷却材９をドレン子る。次に
ダクＪ−４内の空気温度が約１００℃以下になったとこ
ろで出口ダンパー６を全閉し、これと同時に止め弁１４
を開く。そして、ブロワ−１Ｇを運転して外部空気を乾
燥器１５に送り込み、乾燥器１５で乾燥された空気を乾
燥空気注入ノズル１１よりダクト４内に注入する。この
ようにすると、ダクト４内の空気は高温の空気から常温
の乾燥空気に置換されるため、伝熱管２の表面に付着し
た塩分の潮解を防止できる。したがって、本実施例にお
いては塩分の潮解による伝熱管２の腐食を防止でき、空
気冷却器の信頼性及び健全性を向上させることができる
。According to such a configuration, when the surface temperature of the heat exchanger tube 2 drops to 100'C or less as during maintenance, deliquescence of the salt attached to the surface of the heat exchanger tube 2 can be prevented. That is, at the time of maintenance, first, the inlet damper 5 is fully closed, and the coolant 9 in the heat exchanger tubes 2 is drained. Next, when the air temperature inside the duct J-4 drops to about 100°C or less, the outlet damper 6 is fully closed, and at the same time the stop valve 14
open. Then, the blower 1G is operated to send external air into the dryer 15, and the air dried in the dryer 15 is injected into the duct 4 through the dry air injection nozzle 11. In this way, since the air in the duct 4 is replaced from high-temperature air to dry air at room temperature, deliquescence of the salt adhering to the surface of the heat exchanger tube 2 can be prevented. Therefore, in this embodiment, corrosion of the heat exchanger tubes 2 due to deliquescence of salt can be prevented, and the reliability and soundness of the air cooler can be improved.
［発明の効果］
以上説明したように本発明によれば、冷却材が流れる伝
熱管を冷却用空気が流れるダクト内に配置し、このダク
トの入口部及び出口部に閉止用のダンパーを設けた空気
冷却器において、上記ダクトに乾燥空気注入ノズルを設
けると共に上記注入ノズルに乾燥空気注入装置を接続し
たので、ダクト内を乾燥空気に置換することができ、伝
熱管の表面に付着した塩分の潮解を防止できる。したが
って、塩分の潮解による伝熱管の腐食を防止でき、空気
冷却器の信頼性及び健全性を向上させることができる。[Effects of the Invention] As explained above, according to the present invention, a heat transfer tube through which a coolant flows is arranged in a duct through which cooling air flows, and dampers for closing are provided at the inlet and outlet of this duct. In the air cooler, since a dry air injection nozzle is provided in the duct and a dry air injection device is connected to the injection nozzle, the inside of the duct can be replaced with dry air, and the salt adhering to the surface of the heat transfer tube can be deliquesced. can be prevented. Therefore, corrosion of the heat transfer tubes due to deliquescence of salt can be prevented, and the reliability and soundness of the air cooler can be improved.
第１図は本発明の一実施例を示す空気冷却器の構成図、
第２図は従来の空気冷却器の構成図である。
１・・・入口ヘッダ−２・・・伝熱管、３・・・出口ヘ
ッダー、４・・・ダクト、５・・・人口ダンパー ６・
・・出口ダンパー ７・・・ブロワ−８・・・フィン、
９・・・冷却材、１０・・・冷却用空気、１１・・・乾
燥空気注入ノズル、１２・・・配管、１３・・・乾燥空
気注入装置、１４・・・止め弁、１５・・・乾燥器、１
６・・・ブロワ−出願人代理人 弁理士 鈴江武彦FIG. 1 is a configuration diagram of an air cooler showing an embodiment of the present invention;
FIG. 2 is a block diagram of a conventional air cooler. 1... Inlet header 2... Heat exchanger tube, 3... Outlet header, 4... Duct, 5... Artificial damper 6.
...Outlet damper 7...Blower 8...Fin,
9... Coolant, 10... Cooling air, 11... Dry air injection nozzle, 12... Piping, 13... Dry air injection device, 14... Stop valve, 15... Dryer, 1
6...Blower - Applicant's agent Patent attorney Takehiko Suzue
Claims (1)
配置し、このダクトの入口部及び出口部に閉止用のダン
パーを設けた空気冷却器において、上記ダクトに乾燥空
気注入ノズルを設けると共に上記注入ノズルに乾燥空気
注入装置を接続したことを特徴とする空気冷却器。In an air cooler in which a heat transfer tube through which a coolant flows is arranged in a duct through which cooling air flows, and a damper for closing is provided at the inlet and outlet of this duct, a dry air injection nozzle is provided in the duct and the above-mentioned An air cooler characterized in that a dry air injection device is connected to an injection nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1028043A JPH02206799A (en) | 1989-02-07 | 1989-02-07 | Air cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1028043A JPH02206799A (en) | 1989-02-07 | 1989-02-07 | Air cooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02206799A true JPH02206799A (en) | 1990-08-16 |
Family
ID=12237716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1028043A Pending JPH02206799A (en) | 1989-02-07 | 1989-02-07 | Air cooler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02206799A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022550675A (en) * | 2019-09-25 | 2022-12-05 | ジーイー－ヒタチ・ニュークリア・エナジー・アメリカズ・エルエルシー | Coolant purification system and heat sink system and method of operation thereof |
-
1989
- 1989-02-07 JP JP1028043A patent/JPH02206799A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022550675A (en) * | 2019-09-25 | 2022-12-05 | ジーイー－ヒタチ・ニュークリア・エナジー・アメリカズ・エルエルシー | Coolant purification system and heat sink system and method of operation thereof |
| US12456556B2 (en) | 2019-09-25 | 2025-10-28 | Ge-Hitachi Nuclear Energy Americas Llc | Coolant cleanup and heat-sinking systems and methods of operating the same |
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