JPH04177200A - Operation of liquid metal purification system - Google Patents
Operation of liquid metal purification systemInfo
- Publication number
- JPH04177200A JPH04177200A JP2304006A JP30400690A JPH04177200A JP H04177200 A JPH04177200 A JP H04177200A JP 2304006 A JP2304006 A JP 2304006A JP 30400690 A JP30400690 A JP 30400690A JP H04177200 A JPH04177200 A JP H04177200A
- Authority
- JP
- Japan
- Prior art keywords
- carrier gas
- oxygen
- liquid metal
- gas
- solid electrolyte
- 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
- 229910001338 liquidmetal Inorganic materials 0.000 title claims abstract description 43
- 238000000746 purification Methods 0.000 title claims description 17
- 239000001301 oxygen Substances 0.000 claims abstract description 52
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 52
- 239000012159 carrier gas Substances 0.000 claims abstract description 48
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 38
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000007784 solid electrolyte Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract description 28
- 229910052697 platinum Inorganic materials 0.000 abstract description 14
- -1 oxygen ion Chemical class 0.000 abstract description 13
- 238000005868 electrolysis reaction Methods 0.000 abstract description 7
- 230000005611 electricity Effects 0.000 abstract description 6
- 239000001257 hydrogen Substances 0.000 abstract description 5
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 5
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract description 3
- 229910001882 dioxygen Inorganic materials 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract 3
- 239000007787 solid Substances 0.000 abstract 3
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 229910052708 sodium Inorganic materials 0.000 description 5
- 239000011734 sodium Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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】
（産業上の利用分野）
本発明は、高速増殖炉の冷却材である液体金属（液体ナ
トリウム）中の酸素を除去する液体金属純化装置の運転
方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method of operating a liquid metal purification apparatus that removes oxygen from liquid metal (liquid sodium), which is a coolant for a fast breeder reactor.
（従来の技術）
液体金属（液体ナトリウム）中の酸素を除去する液体金
属純化装置の従来例を第２図により説明すると、（１）
が純化タンク、（２）が同純化タンク（１）内の液体金
属（液体ナトリウム）、（１１）が酸素イオン導電性の
固体電解質管、 （１２）が白金電極、 （１４）がキ
ャリヤガス導入管、 （１５）がキャリヤガス排出管、
（２０）が電源であり、内部に白金電極（１２）を封
入して先端部を閉じた酸素イオン導電性の固体電解質管
（１１）を液体金属（２）中に設置し、キャリヤガスを
キャリヤガス導入管（１４）から固体電解質管（１１）
内へ導入する一方、固体電解質管（１１）の液体金属（
２）側にマイナスの電気を、同固体電解質管（１１）の
白金電極（１２）側にプラスの電気を、それぞれ通電す
る。このとき、液体金属（２）側の酸素が酸素イオン０
トになって、上記固体電解質管（１１）中を白金電極（
１２）側へ移動する。そして白金電極（１２）側で酸素
イオンＱ！−が電子を電極に渡し、酸素ガスになり、キ
ャリヤガス（例えばＮ２．不活性ガス）中へ移行して、
キャリヤガスとともにキャリヤガス排出管（１５）から
固体電解質管（１１）外へ排出される。(Prior Art) A conventional example of a liquid metal purification device that removes oxygen from liquid metal (liquid sodium) is explained with reference to Fig. 2. (1)
is the purification tank, (2) is the liquid metal (liquid sodium) in the purification tank (1), (11) is the oxygen ion conductive solid electrolyte tube, (12) is the platinum electrode, and (14) is the carrier gas introduction. (15) is a carrier gas discharge pipe;
(20) is a power supply, and an oxygen ion conductive solid electrolyte tube (11) with a platinum electrode (12) sealed inside and a closed tip is installed in the liquid metal (2), and a carrier gas is supplied to the carrier gas. From the gas introduction pipe (14) to the solid electrolyte pipe (11)
While introducing the liquid metal (
Negative electricity is applied to the 2) side, and positive electricity is applied to the platinum electrode (12) side of the solid electrolyte tube (11). At this time, the oxygen on the liquid metal (2) side is oxygen ion 0
The platinum electrode (
12) Move to the side. And oxygen ion Q on the platinum electrode (12) side! - transfers electrons to the electrode, becomes oxygen gas, moves into carrier gas (e.g. N2, inert gas),
Together with the carrier gas, it is discharged from the carrier gas discharge pipe (15) to the outside of the solid electrolyte pipe (11).
なお液体金属中酸素分圧と固体電解質内側のキャリヤガ
ス中酸素分圧とにより発生する後記電位を、電位液体金
属側と固体電解質内側の白金電極とに与えることにより
、液体金属中の酸素をキャリヤガス中へ移行させること
ができる。By applying the electric potential (described below) generated by the partial pressure of oxygen in the liquid metal and the partial pressure of oxygen in the carrier gas inside the solid electrolyte to the potential liquid metal side and the platinum electrode inside the solid electrolyte, the oxygen in the liquid metal can be used as a carrier. It can be transferred into gas.
但しＥｚ電位（Ｖ）、Ｒ：気体定数１Ｔ：温度（Ｋ）、
Ｆ： ファラデ一定数、Ｐｏｚ：液体金属中の酸素分圧
＋Ｐ’Ｏ２：キャリャガス中の酸素分圧である。However, Ez potential (V), R: gas constant 1T: temperature (K),
F: Faraday constant, Poz: partial pressure of oxygen in liquid metal + P'O2: partial pressure of oxygen in carrier gas.
（発明が解決しようとする課題） 前記従来の液体金属純化装置の運転方法には。(Problem to be solved by the invention) In the method of operating the conventional liquid metal purification apparatus.
次の問題があった。即ち、液体金属温度８７３゜Ｋ、液
体金属中酸素濃度１０ＰＰａ＋は、液体金属中酸素分圧
２．７２ Ｘ １０−”ａｔｌｍに相当する。I had the following problem. That is, a liquid metal temperature of 873°K and an oxygen concentration in the liquid metal of 10 Ppa+ correspond to an oxygen partial pressure in the liquid metal of 2.72 x 10-'' atlm.
キャリヤガスを純度９９．９９％の窒素、残りのガスを
酸素とすると、酸素分圧は、ｌＸｌ０−’ａｔｍになり
、このときの電位Ｅは、１．７３Ｖになる。従って白金
電極側をプラスとし、液体金属側をマイナスとして、１
．７３Ｖ以上の電圧を印加しなければ、液体金属中の酸
素除去を行えない。If the carrier gas is nitrogen with a purity of 99.99% and the remaining gas is oxygen, the oxygen partial pressure will be lXl0-'atm, and the potential E at this time will be 1.73V. Therefore, the platinum electrode side is set as positive, the liquid metal side is set as negative, and 1
．． Unless a voltage of 73V or higher is applied, oxygen in the liquid metal cannot be removed.
この電圧を低（することが、酸素の除去コストを低くす
る上で重要である。またこの印加電圧が２■を越えると
、固体電解質自身に電気分解の生じる恐れがあり、印加
電圧は低い程よい。It is important to keep this voltage low in order to reduce the cost of oxygen removal. Also, if this applied voltage exceeds 2.2 mm, there is a risk that electrolysis will occur in the solid electrolyte itself, so the lower the applied voltage, the better. .
本発明は前記の問題点に鑑み提案するものであり、その
目的とする処は１酸素の除去コストを低減できる。また
固体電解質の電気分解等の劣化原因をなくすことができ
る液体金属純化装置の運転方法を提供しようとする点に
ある。The present invention is proposed in view of the above-mentioned problems, and its purpose is to reduce the cost of removing 1 oxygen. Another object of the present invention is to provide a method of operating a liquid metal purification apparatus that can eliminate causes of deterioration such as electrolysis of a solid electrolyte.
（課題を解決するための手段）
上記の目的を達成するために１本発明は、酸素イオン導
電性の固体電解質管により液体金属中の酸素を除去する
液体金属純化装置を運転するに当たり、酸素放出側のキ
ャリアガスとして水素ガスを含むキャリアガスを流すこ
とを特徴としている。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a method for releasing oxygen when operating a liquid metal purification device that removes oxygen from liquid metal using an oxygen ion conductive solid electrolyte tube. It is characterized by flowing a carrier gas containing hydrogen gas as a side carrier gas.
（作用）
本発明は前記のように酸素イオン導電性固体電解質管に
より液体金属中の酸素を除去する液体金属純化装置を運
転するに当たり、酸素放出側のキャリアガスとして水素
ガスを含むキャリアガスを流す。その場合、水素ガス濃
度を１％にすると。(Function) As described above, when operating a liquid metal purification device that removes oxygen from a liquid metal using an oxygen ion conductive solid electrolyte tube, the present invention allows a carrier gas containing hydrogen gas to flow as a carrier gas on the oxygen release side. . In that case, if the hydrogen gas concentration is 1%.
キャリヤガス中の水素ガス濃度と湿分（水分濃度）とか
ら決まるキャリヤガス中酸素分圧が低くなって、液体金
属温度素をキャリヤガス中へ移行させるために必要な電
位が低くなる。The oxygen partial pressure in the carrier gas, which is determined by the hydrogen gas concentration and moisture (moisture concentration) in the carrier gas, becomes lower, and the potential required to transfer the liquid metal thermoelement into the carrier gas becomes lower.
（実施例）
次に本発明の液体金属純化装置の構成例を第１図により
説明すると、（１）が純化タンク、（２）が同純化タン
ク（１）内の液体金属（液体ナトリウム）。(Example) Next, a configuration example of the liquid metal purification apparatus of the present invention will be described with reference to FIG. 1. (1) is a purification tank, and (2) is the liquid metal (liquid sodium) in the purification tank (1).
（１１）が酸素イオン導電性の固体電解質管、 （１２
）が白金電極、 （１４）がキャリヤガス導入管、 （
１５）がキャリヤガス排出管、 （２０）が電源である
。(11) is an oxygen ion conductive solid electrolyte tube, (12)
) is a platinum electrode, (14) is a carrier gas introduction tube, (
15) is the carrier gas discharge pipe, and (20) is the power supply.
次に前記第１図に示す液体金属純化装置の運転方法を説
明する。水素ガスを含むキャリヤガスをキャリヤガス導
入管（１４）から固体電解質管（１１）内へ導入する一
方、固体電解質管（１１）の液体金属（２）側にマイナ
スの電気を、同固体電解賞管（１１）の白金電極（１２
）側にプラスの電気を、それぞれ通電する。このとき、
液体金属（２）側の酸素が酸素イオン０トになって、上
記固体電解質管（１１）中を白金電極（１２）側へ移動
する。そして白金電極（１２）側で酸素イオン０トが電
子を電極に渡し、酸素ガスになり、キャリヤガス（例え
ばＮ２．不活性ガス）中へ移行して、キャリヤガスとと
もにキャリヤガス排出管（１５）から固体電解質管（１
１）外へ排出される。Next, a method of operating the liquid metal purification apparatus shown in FIG. 1 will be explained. A carrier gas containing hydrogen gas is introduced into the solid electrolyte tube (11) from the carrier gas introduction tube (14), while negative electricity is applied to the liquid metal (2) side of the solid electrolyte tube (11). Platinum electrode (12) on tube (11)
) side with positive electricity. At this time,
The oxygen on the liquid metal (2) side is reduced to zero oxygen ions and moves in the solid electrolyte tube (11) to the platinum electrode (12) side. Then, on the platinum electrode (12) side, the oxygen ions transfer electrons to the electrode, become oxygen gas, move into the carrier gas (for example, N2, inert gas), and go into the carrier gas exhaust pipe (15) along with the carrier gas. Solid electrolyte tube (1
1) It is discharged outside.
上記のように水素ガスを含むキャリヤガスをキャリヤガ
ス導入管（１４）から固体電解質管（１１）内へ導入す
る場合、キャリヤガス中の水素ガス濃度と湿分（水分濃
度）とからキャリヤガス中酸素分圧が決まる。水素ガス
濃度を１％にした場合、水分濃度と酸素分圧とは１表１
に示す関係になる。When a carrier gas containing hydrogen gas is introduced into the solid electrolyte tube (11) from the carrier gas introduction pipe (14) as described above, the hydrogen gas concentration and moisture (moisture concentration) in the carrier gas are Oxygen partial pressure is determined. When the hydrogen gas concentration is 1%, the moisture concentration and oxygen partial pressure are 1 Table 1
The relationship shown is as follows.
なお表１のＡは水分濃度、Ｂは温度である。In Table 1, A is the water concentration and B is the temperature.
表１
即ち、水素１％を含む窒素ガスで、その中の湿分が１１
００Ｖｐｐ （露点で一４０°Ｃ）のキャリヤガスを流
す場合、このキャリヤガス中の酸素分圧は、 ４．９７
ＸＩＯ”２９ａｔｍになる。液体金属中の酸素濃度が１
０ｐｐｍのとき、その酸素分圧は、２．７２ Ｘｌ０−
”ａｔｍであるので、必要な電圧Ｅは、０．５３Ｖにな
り、０．５３Ｖ以上の印加電圧により液体金属中の酸素
をキャリヤガス中へ移行させることができる。Table 1 In other words, nitrogen gas containing 1% hydrogen has a moisture content of 11%.
When a carrier gas of 00Vpp (dew point -40°C) is flowed, the oxygen partial pressure in this carrier gas is 4.97.
XIO” becomes 29 atm.The oxygen concentration in the liquid metal is 1
At 0 ppm, the oxygen partial pressure is 2.72 Xl0-
Since it is ``atm'', the required voltage E is 0.53V, and oxygen in the liquid metal can be transferred into the carrier gas by applying a voltage of 0.53V or more.
なお原理的に水素濃度は何％でもよく、特に制限はない
。但し水素は爆発の危険性があるので。In principle, the hydrogen concentration may be any percentage and is not particularly limited. However, hydrogen has the risk of explosion.
４％以下の濃度で使用することが望ましい。It is desirable to use it at a concentration of 4% or less.
（発明の効果）
本発明は前記のように酸素イオン導電性の固体電解質管
により液体金属中の酸素を除去する液体金属純化装置を
運転するに当たり、酸素放出側のキャリアガスとして水
素ガスを含むキャリアガスを流す。その場合、水素ガス
濃度を１％にすると。(Effects of the Invention) The present invention provides a carrier gas containing hydrogen gas as a carrier gas on the oxygen release side when operating a liquid metal purification device that removes oxygen from a liquid metal using an oxygen ion conductive solid electrolyte tube as described above. Let the gas flow. In that case, if the hydrogen gas concentration is 1%.
キャリヤガス中の水素ガス濃度と湿分（水分濃度）とか
ら決まるキャリヤガス中酸素分圧を低くできて、液体金
属中酸素をキャリヤガス中へ移行させるために必要な電
位を低くできるので、酸素の除去コストを低減できる。The oxygen partial pressure in the carrier gas, which is determined by the hydrogen gas concentration and moisture (moisture concentration) in the carrier gas, can be lowered, and the potential required to transfer oxygen in the liquid metal into the carrier gas can be lowered. Removal costs can be reduced.
また固体電解質管に高電圧を印加する必要がなくて、固
体電解質の電気分解等の劣化原因をなくすことができる
効果がある。Furthermore, there is no need to apply a high voltage to the solid electrolyte tube, which has the effect of eliminating causes of deterioration such as electrolysis of the solid electrolyte.
第１図は本発明に係わる液体金属純化装置の運転方法を
示す説明図、第２図は従来の液体金属純化装置の運転方
法を示す説明図である。
（１）・・・純化タンク、（２）・・純化タンク（１）
内の液体金属（液体ナトリウム）、（１１）・・・酸素
イオン導電性の固体電解質管、 （１２） ・・・白
金電極。
（１４）・・・キャリヤガス導入管、 （１５） ・
・・キャリヤガス排出管、 （２０）・・・電源。FIG. 1 is an explanatory diagram showing an operating method of a liquid metal purifying apparatus according to the present invention, and FIG. 2 is an explanatory diagram showing an operating method of a conventional liquid metal purifying apparatus. (1)...Purification tank, (2)...Purification tank (1)
Liquid metal (liquid sodium) inside, (11)...Oxygen ion conductive solid electrolyte tube, (12)...Platinum electrode. (14)...Carrier gas introduction pipe, (15) ・
...Carrier gas discharge pipe, (20)...Power supply.
Claims (1)
素を除去するに当たり、酸素放出側のキャリアガスとし
て水素ガスを含むキャリアガスを流すことを特徴とした
液体金属純化装置の運転方法。A method of operating a liquid metal purification device characterized by flowing a carrier gas containing hydrogen gas as a carrier gas on the oxygen release side when removing oxygen from a liquid metal using an oxygen ion conductive solid electrolyte tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2304006A JP2858589B2 (en) | 1990-11-13 | 1990-11-13 | Operating method of liquid metal purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2304006A JP2858589B2 (en) | 1990-11-13 | 1990-11-13 | Operating method of liquid metal purifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04177200A true JPH04177200A (en) | 1992-06-24 |
| JP2858589B2 JP2858589B2 (en) | 1999-02-17 |
Family
ID=17927929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2304006A Expired - Lifetime JP2858589B2 (en) | 1990-11-13 | 1990-11-13 | Operating method of liquid metal purifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2858589B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003057390A (en) * | 2001-08-13 | 2003-02-26 | Mitsui Eng & Shipbuild Co Ltd | Control method for concentration of oxygen dissolved in liquid metal |
-
1990
- 1990-11-13 JP JP2304006A patent/JP2858589B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003057390A (en) * | 2001-08-13 | 2003-02-26 | Mitsui Eng & Shipbuild Co Ltd | Control method for concentration of oxygen dissolved in liquid metal |
| JP4488658B2 (en) * | 2001-08-13 | 2010-06-23 | 三井造船株式会社 | Method for controlling dissolved oxygen concentration in liquid metal |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2858589B2 (en) | 1999-02-17 |
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