JPH0371362B2 - - Google Patents
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- Publication number
- JPH0371362B2 JPH0371362B2 JP17192083A JP17192083A JPH0371362B2 JP H0371362 B2 JPH0371362 B2 JP H0371362B2 JP 17192083 A JP17192083 A JP 17192083A JP 17192083 A JP17192083 A JP 17192083A JP H0371362 B2 JPH0371362 B2 JP H0371362B2
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- Prior art keywords
- oxygen
- oxygen concentration
- air
- deoxygenated
- valve
- Prior art date
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- Oxygen, Ozone, And Oxides In General (AREA)
Description
【発明の詳細な説明】
本発明は酸素を含む混合気体中の酸素濃度を制
御する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of controlling oxygen concentration in a mixed gas containing oxygen.
生物学、化学、医学、金属学その他の研究分野
で、気相中の酸素濃度を任意に制御する必要があ
る場合が多い。しかるに従来、窒素、アルゴン、
あるいはヘリウムの如き不活性気体と酸素とを適
当に混合するという方法が採用されていたが、ボ
ンベ操作およびガスの流量調節操作は煩雑であつ
た。 In biology, chemistry, medicine, metallurgy, and other research fields, it is often necessary to arbitrarily control the oxygen concentration in the gas phase. However, conventionally, nitrogen, argon,
Alternatively, a method of appropriately mixing an inert gas such as helium with oxygen has been adopted, but the operation of the cylinder and the adjustment of the gas flow rate are complicated.
これに対し、本願発明者らは、特公昭57−
28907号で電気化学的手法を用いて酸素濃度を自
動的に制御する方法を提案した。 In contrast, the inventors of the present application
In No. 28907, we proposed a method to automatically control oxygen concentration using electrochemical methods.
すなわち、酸素の電解還元に有効なガス拡散電
極を陰極とし、酸素発生電極を陽極とし、水酸化
カリウム、水酸化ナトリウムあるいは硫酸の水溶
液もしくはカチオン交換膜などを電解液あるいは
電解質としてなる電解槽において、陰極に酸素を
含む混合ガスを供給しつつ、陰・陽両極間に直流
電圧を印加すると、陰極では
O2＋2H2O＋4e-→4OH-（アルカリ電解液）
または、
O2＋4H+＋4e-→2H2O（酸性電解液またはカチ
オン交換膜）なる反応により、酸素が選択的に消
費され、陽極では、
4OH-→O2＋2H2O＋4e-（アルカリ電解液）
または
2H2O→O2＋4H+＋4e-（酸性電解液またはカチ
オン交換膜）なる反応により、酸素が発生する。 That is, in an electrolytic cell in which a gas diffusion electrode effective for electrolytic reduction of oxygen is used as a cathode, an oxygen generation electrode is used as an anode, and an aqueous solution of potassium hydroxide, sodium hydroxide, or sulfuric acid, or a cation exchange membrane, etc. is used as an electrolyte or electrolyte, When a DC voltage is applied between the anode and anode while supplying a mixed gas containing oxygen to the cathode, O 2 +2H 2 O+4e - →4OH - (alkaline electrolyte) or O 2 +4H + +4e - →2H at the cathode. Oxygen is selectively consumed by the reaction 2 O (acidic electrolyte or cation exchange membrane), and at the anode, 4OH - →O 2 +2H 2 O+4e - (alkaline electrolyte) or 2H 2 O→O 2 +4H + +4e - Oxygen is generated by the reaction (acidic electrolyte or cation exchange membrane).
つまり、酸素を含む混合ガス中の酸素だけが陰
極側から陽極側に移行するので、かゝる電解槽は
酸素分離装置として機能する。 In other words, since only oxygen in the oxygen-containing mixed gas moves from the cathode side to the anode side, such an electrolytic cell functions as an oxygen separation device.
したがつて、かゝる酸素分離装置を２個用意
し、そのうちの１個の陰極に酸素濃度を制御しよ
うとする酸素濃度制御室の中の気体を接触させる
とともに陽極から発生してくる酸素を系外に排気
せしめる一方、他の１個の陰極に大気を供給し、
陽極から発生してくる酸素を酸素濃度制御室に供
給するようにし、酸素濃度制御室の酸素濃度が所
定のそれより高すぎる場合には、前者の脱酸素機
能を有する酸素分離装置を作動せしめて酸素濃度
を低下させ、所定の酸素濃度より低すぎるときに
は、後者の酸素発生機能を有する酸素分離装置を
作動せしめて、酸素濃度を増大させることによ
り、酸素濃度制御室内の酸素濃度を所定のそれに
制御することができる。 Therefore, two such oxygen separation devices are prepared, and one of the cathodes is brought into contact with the gas in the oxygen concentration control chamber in which the oxygen concentration is to be controlled, and the oxygen generated from the anode is brought into contact with the cathode of one of them. While exhausting the air outside the system, supplying air to the other cathode,
Oxygen generated from the anode is supplied to the oxygen concentration control chamber, and if the oxygen concentration in the oxygen concentration control chamber is too high than a predetermined value, the former oxygen separation device having an oxygen removal function is activated. When the oxygen concentration is lowered and is too low than a predetermined oxygen concentration, the oxygen separation device having an oxygen generation function is activated to increase the oxygen concentration, thereby controlling the oxygen concentration in the oxygen concentration control chamber to a predetermined value. can do.
このように、脱酸素機能を利用する酸素分離装
置と酸素発生機能を利用する酸素分離装置とをそ
れぞれ別途に用意して酸素濃度を制御する方法が
前述の特公昭57−28907号で提案した方法である。 In this way, the method proposed in the above-mentioned Japanese Patent Publication No. 57-28907 is to separately prepare an oxygen separation device that uses the oxygen removal function and an oxygen separation device that uses the oxygen generation function to control the oxygen concentration. It is.
本発明は、上述の酸素濃度制御方法をさらに効
率的かつ簡便にせんとするものである。 The present invention aims to make the above-described oxygen concentration control method more efficient and simple.
本発明の第一の特長はひとつの電気化学的酸素
分離装置に脱酸素機能と酸素発生機能の双方をも
たせた点である。すなわち電気化学的酸素分離装
置を脱酸素装置として作用させるときにも、酸素
発生装置として作用させるときにも、陰極に大気
中の空気を供給し、陰・陽両極間に、直流電流を
通電し、陽極から酸素を発生させ、脱酸素された
空気が必要なときには、陰極で脱酸素された残り
の空気を利用し、酸素が必要なときには陽極で発
生する酸素を利用する。かかる方法を採用すると
ひとつの電気化学的酸素分離装置ですむので効率
的である。ただこの方法の場合には、一般に陰極
で脱酸素された残りの空気中の酸素濃度は陰極へ
の空気供給量に依存し、空気の供給量を少なくす
ればするほど出てくるガスの酸素濃度が低くな
る。したがつて、脱酸素された空気を利用する場
合には、酸素を利用する場合より、相対的に少量
の空気を供給するようにする必要がある。 The first feature of the present invention is that a single electrochemical oxygen separation device has both oxygen removal and oxygen generation functions. In other words, when an electrochemical oxygen separator is used as a deoxidizer or as an oxygen generator, air from the atmosphere is supplied to the cathode, and a direct current is passed between the anode and negative electrodes. , oxygen is generated from the anode, and when deoxygenated air is needed, the remaining air deoxidized at the cathode is used, and when oxygen is needed, the oxygen generated at the anode is used. Adopting such a method is efficient because it requires only one electrochemical oxygen separation device. However, in the case of this method, the oxygen concentration in the remaining air that has been deoxygenated at the cathode generally depends on the amount of air supplied to the cathode, and the smaller the amount of air supplied, the more the oxygen concentration in the gas that comes out. becomes lower. Therefore, when using deoxygenated air, it is necessary to supply a relatively smaller amount of air than when using oxygen.
本発明の第二の特長は、ガスの流れを流通式に
した点にある。すなわち、電気化学的脱酸素分離
装置と酸素濃度の対象となる酸素濃度制御室とを
往路ガス系路を介して接続し、電気化学的酸素分
離装置から出てくる脱酸素された空気もしくは酸
素を往路ガス系路を経て、酸素濃度制御室に供給
し、酸素濃度制御室から追い出されてくるガスを
酸素濃度計収納した酸素濃度検出室およびリリー
フ弁を経て系外に放出するようなガスの流れの系
路にすることにより、系が単純化される。またこ
のような系では脱酸素反応による減圧を回避する
ことができるので、減圧補償措置を講じなくても
すむという簡便さがある。 The second feature of the present invention is that the gas flow is a flow type. That is, the electrochemical deoxygenation separation device and the oxygen concentration control room where the oxygen concentration is to be controlled are connected via an outgoing gas line, and the deoxygenated air or oxygen coming out of the electrochemical oxygen separation device is A flow of gas that is supplied to the oxygen concentration control room through the outgoing gas line, and the gas that is expelled from the oxygen concentration control room is released outside the system through the oxygen concentration detection chamber that houses the oxygen concentration meter and the relief valve. The system is simplified by making the path . Furthermore, in such a system, it is possible to avoid pressure reduction due to a deoxidizing reaction, so there is a convenience in that there is no need to take pressure reduction compensation measures.
電気化学的酸素分離装置と酸素濃度制御室とは
一体に接続してもよいし、着脱自在の流体継手を
介して接続し、酸素濃度制御室内の酸素濃度が所
望値になつたのちに、電気化学的酸素分離装置と
酸素濃度制御室とを切り離すようにしてもよい。 The electrochemical oxygen separation device and the oxygen concentration control chamber may be connected together or via a detachable fluid coupling, and after the oxygen concentration in the oxygen concentration control chamber reaches the desired value, the electrical The chemical oxygen separator and the oxygen concentration control room may be separated.
以下、本発明の実施例について詳述する。 Examples of the present invention will be described in detail below.
実施例
第１図は、酸素濃度の制御システム系統図を示
す。Embodiment FIG. 1 shows a system diagram of an oxygen concentration control system.
酸素濃度の制御システムは、主として電気化学
的酸素分離装置１、往路ガス系路２、酸素制御室
３、酸素濃度検出室４、リリーフ弁５、および制
御部６から構成される。 The oxygen concentration control system mainly includes an electrochemical oxygen separation device 1 , an outgoing gas line 2 , an oxygen control chamber 3 , an oxygen concentration detection chamber 4 , a relief valve 5 , and a control section 6 .
電気化学的酸素分離装置１は、酸素の電解還元
に有効なガス拡散電極からなる陰極７、酸素発生
電極としての陽極８、硫酸の水溶液からなる電解
液９、陰極ガス室１０およびセルフレーム１１か
ら構成される。 The electrochemical oxygen separation device 1 includes a cathode 7 consisting of a gas diffusion electrode effective for electrolytic reduction of oxygen, an anode 8 serving as an oxygen generating electrode, an electrolyte 9 consisting of an aqueous solution of sulfuric acid, a cathode gas chamber 10 and a cell frame 11. configured.
電気化学的酸素分離装置１には、空気導入ポン
プ１２、空気流量調節弁１３及び空気流量計１４
が付設されている。 The electrochemical oxygen separation device 1 includes an air introduction pump 12, an air flow control valve 13, and an air flow meter 14.
is attached.
往路ガス系路２は、脱酸素空気供給系路１５お
よび酸素供給系路１６から構成され、脱酸素空気
供給系路１５には脱酸素空気供給弁１７および脱
酸素残余空気放出弁１８が設けられ、酸素供給系
路１６には酸素供給弁１９および酸素放出弁２０
が設けられている。 The outgoing gas line 2 is composed of a deoxygenated air supply line 15 and an oxygen supply line 16 , and the deoxygenated air supply line 15 is provided with a deoxygenated air supply valve 17 and a deoxygenated residual air release valve 18. , an oxygen supply valve 19 and an oxygen release valve 20 are provided in the oxygen supply line 16 .
is provided.
酸素濃度の制御方法は次のようにしておこなわ
れる。 The oxygen concentration is controlled as follows.
まず、酸素濃度検出室４の中に収納されている
酸素濃度計２１によつて検知される酸素濃度制御
室３内の酸素濃度が所定値よりも高すぎる場合に
は脱酸素空気供給弁１７、酸素放出弁２０および
リリーフ弁５を開き、酸素供給弁１９および脱酸
素残余空気放出弁１８を閉じ、空気導入ポンプ１
２を駆動させ、空気流量計１４をみながら空気流
量調節弁１３で空気流量を調節して、空気を陰極
ガス室１０に供給するとともに、制御部６に組込
まれている電源から、陰極７と陽極８との間に直
流の定電圧を印加すると、陰極７で脱酸素反応が
起り、脱酸素空気が、脱酸素空気供給弁１７を経
て酸素濃度制御室３に供給され、そのために酸素
濃度制御室３から追い出されてくるガスは酸素濃
度検出室４を経て、リリーフ弁５から系外に放出
される。一方、陽極８から発生する酸素は、酸素
放出弁２０から系外に放出される。かくして、酸
素濃度制御室３内の酸素濃度は徐々に低下し、所
定値に達したとき、制御部６からの通電が止めら
れ、空気導入ポンプ１２の駆動が止められ、脱酸
素空気供給弁１７およびリリーフ弁５が閉じられ
る。 First, if the oxygen concentration in the oxygen concentration control chamber 3 detected by the oxygen concentration meter 21 housed in the oxygen concentration detection chamber 4 is too high than a predetermined value, the deoxygenated air supply valve 17, The oxygen release valve 20 and the relief valve 5 are opened, the oxygen supply valve 19 and the deoxygenated residual air release valve 18 are closed, and the air introduction pump 1 is closed.
2, adjust the air flow rate with the air flow control valve 13 while monitoring the air flow meter 14, and supply air to the cathode gas chamber 10. At the same time, the cathode 7 and When a constant DC voltage is applied between the anode 8 and the anode 8, a deoxidation reaction occurs at the cathode 7, and deoxygenated air is supplied to the oxygen concentration control chamber 3 via the deoxidized air supply valve 17, thereby controlling the oxygen concentration. The gas expelled from the chamber 3 passes through the oxygen concentration detection chamber 4 and is discharged from the relief valve 5 to the outside of the system. On the other hand, oxygen generated from the anode 8 is released from the oxygen release valve 20 to the outside of the system. In this way, the oxygen concentration in the oxygen concentration control chamber 3 gradually decreases, and when it reaches a predetermined value, the power supply from the control section 6 is stopped, the driving of the air introduction pump 12 is stopped, and the deoxygenated air supply valve 17 is stopped. and the relief valve 5 is closed.
他方、酸素濃度制御室３内の酸素濃度が所定値
より低すぎる場合には、酸素供給弁１９、脱酸素
残余空気放出弁１８およびリリーフ弁５を開け、
脱酸素空気供給弁１７および酸素放出弁２０を閉
じ、空気導入ポンプ１２を駆動させて空気を陰極
ガス室１０に供給すると共に、陰極７と陽極８と
の間に直流の定電流を通電すると、陰極８で発生
する酸素が、酸素供給弁１９を経て、酸素濃度制
御室３に供給され、そのために酸素濃度制御室３
から追い出されるガスは、酸素濃度検出室４を経
て、リリーフ弁５から系外に放出される。一方、
陰極７で脱酸素された残余空気は、脱酸素残余空
気放出弁１８から系外に放出される。 On the other hand, if the oxygen concentration in the oxygen concentration control chamber 3 is too low than the predetermined value, the oxygen supply valve 19, the deoxygenated residual air release valve 18, and the relief valve 5 are opened;
When the deoxygenated air supply valve 17 and the oxygen release valve 20 are closed, the air introduction pump 12 is driven to supply air to the cathode gas chamber 10, and a constant DC current is passed between the cathode 7 and the anode 8. Oxygen generated at the cathode 8 is supplied to the oxygen concentration control chamber 3 via the oxygen supply valve 19, and therefore the oxygen concentration control chamber 3
The gas expelled from the oxygen concentration detection chamber 4 is discharged from the relief valve 5 to the outside of the system. on the other hand,
The residual air deoxidized at the cathode 7 is discharged to the outside of the system from the deoxygenated residual air release valve 18.
かくして、酸素濃度制御室３内の酸素濃度は
徐々に上昇し、ついには所定値に達する。 In this way, the oxygen concentration in the oxygen concentration control chamber 3 gradually increases and finally reaches a predetermined value.
上述の操作は制御部６に組み込まれている、比
較器、シーケンス回路によつて自動的におこなわ
れる。 The above operations are automatically performed by a comparator and a sequence circuit built into the control section 6.
以上詳述せる如く、本発明は効率的かつ簡便な
酸素濃度の制御方法を提供するもので、その工業
的価値極めて大である。 As detailed above, the present invention provides an efficient and simple method for controlling oxygen concentration, and has extremely high industrial value.
なお、上述の実施例において、脱酸素残余空気
放出弁１８は、脱酸素空気供給系路１５の一部に
設置されているが、陰極ガス室１０に直結しても
よい。 In the above embodiment, the deoxygenated residual air release valve 18 is installed in a part of the deoxygenated air supply line 15, but it may be directly connected to the cathode gas chamber 10.
第１図は、本発明の一実施例にかかる酸素濃度
の制御システム系統図を示す。
１……電気化学的酸素分離装置、２……往路ガ
ス系路、３……酸素濃度制御室、４……酸素濃度
検出室、５……リリーフ弁、６……制御部、７…
…陰極、８……陽極、９……電解液、１０……陰
極ガス室、１１……セルフレーム、１２……空気
導入ポンプ、１３……空気流量調節弁、１４……
空気流量計、１５……脱酸素空気供給系路、１６
……酸素供給系路、１７……脱酸素空気供給弁、
１８……脱酸素残余空気放出弁、１９……酸素供
給弁、２０……酸素放出弁、２１……酸素濃度
計。
FIG. 1 shows a system diagram of an oxygen concentration control system according to an embodiment of the present invention. 1 ... Electrochemical oxygen separation device, 2 ... Outgoing gas line, 3... Oxygen concentration control chamber, 4... Oxygen concentration detection chamber, 5... Relief valve, 6... Control section, 7...
... cathode, 8 ... anode, 9 ... electrolyte, 10 ... cathode gas chamber, 11 ... cell frame, 12 ... air introduction pump, 13 ... air flow control valve, 14 ...
Air flow meter, 15 ... Deoxidized air supply line, 16
...Oxygen supply line, 17...Deoxygenated air supply valve,
18...Deoxygenated residual air release valve, 19...Oxygen supply valve, 20...Oxygen release valve, 21...Oxygen concentration meter.
Claims (1)
る陰極と酸素発生電極からなる陽極と電解質と陰
極ガス室とから構成され、脱酸素機能と酸素発生
機能の双方を有する電気化学的酸素分離装置と酸
素濃度制御室とを脱酸素空気供給弁と脱酸素残余
空気放出弁とをそなえる脱酸素空気供給系路と、
酸素供給弁と酸素放出弁とをそなえる酸素供給系
路とから構成される往路ガス系路を介して接続す
るとともに、空気を空気導入ポンプ、流量調節弁
を経て、陰極ガス室に導入するようにし、さら
に、酸素濃度制御室から追い出されるガスを酸素
濃度計を収納せる酸素濃度検出室およびリリーフ
弁を経て系外に放出するような系を構成し、酸素
濃度検出室内の酸素濃度が所定の濃度より高すぎ
る際には、脱酸素空気供給弁および酸素放出弁を
開け、酸素供給弁および脱酸素残余空気放出弁を
閉じ、空気導入ポンプを駆動させ、電気化学的酸
素分離装置の陰極と陽極との間に直流電流を通電
することによつて陰極で脱酸素された空気を往路
ガス系路を経て、酸素濃度制御室に供給し、陽極
から発生する酸素を酸素放出弁から系外に放出す
るとともに、酸素濃度制御室から追い出されてく
るガスを酸素濃度検出室を経て、リリーフ弁から
系外に放出し、反対に酸素濃度検出室内の酸素濃
度が所定の濃度より低すぎる際には、酸素供給弁
および脱酸素残余空気放出弁を開け、脱酸素空気
供給弁および酸素放出弁を閉じ、空気導入ポンプ
を駆動させ、電気化学的酸素分離装置の陰極と陽
極との間に直流電流を通電することによつて、陽
極から発生する酸素を往路ガス系路を経て、酸素
濃度制御室に供給し、陰極で脱酸素された空気を
脱酸素残余空気放出弁から系外に放出するととも
に酸素濃度制御室から追い出されてくるガスを酸
素濃度検出室を経て、リリーフ弁から系外に放出
することを特徴とする酸素濃度の制御方法。1. An electrochemical oxygen separation device that is composed of a cathode consisting of a gas diffusion electrode effective for the electrolytic reduction of oxygen, an anode consisting of an oxygen generating electrode, an electrolyte, and a cathode gas chamber, and having both a deoxidizing function and an oxygen generating function. a deoxygenated air supply system line comprising an oxygen concentration control room, a deoxygenated air supply valve and a deoxygenated residual air release valve;
It is connected via an outgoing gas line consisting of an oxygen supply line having an oxygen supply valve and an oxygen release valve, and air is introduced into the cathode gas chamber through an air introduction pump and a flow rate control valve. Furthermore, a system is constructed in which the gas expelled from the oxygen concentration control chamber is released outside the system through an oxygen concentration detection chamber that houses an oxygen concentration meter and a relief valve, so that the oxygen concentration in the oxygen concentration detection chamber reaches a predetermined concentration. When the temperature is too high, open the deoxygenated air supply valve and oxygen release valve, close the oxygen supply valve and deoxygenated residual air release valve, drive the air introduction pump, and connect the cathode and anode of the electrochemical oxygen separation device. The air deoxidized at the cathode by passing a direct current between the two is supplied to the oxygen concentration control room via the outgoing gas line, and the oxygen generated from the anode is released from the oxygen release valve to the outside of the system. At the same time, the gas expelled from the oxygen concentration control chamber passes through the oxygen concentration detection chamber and is released outside the system from the relief valve. Open the supply valve and the deoxygenated residual air release valve, close the deoxygenated air supply valve and the oxygen release valve, drive the air introduction pump, and apply a direct current between the cathode and the anode of the electrochemical oxygen separation device. In this way, the oxygen generated from the anode is supplied to the oxygen concentration control room via the outgoing gas line, and the air deoxygenated at the cathode is released outside the system from the deoxygenated residual air release valve, and the oxygen concentration is controlled. A method for controlling oxygen concentration, characterized in that gas expelled from the chamber passes through an oxygen concentration detection chamber and is released outside the system from a relief valve.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17192083A JPS6065704A (en) | 1983-09-17 | 1983-09-17 | How to control oxygen concentration |
| US06/612,945 US4539086A (en) | 1983-08-31 | 1984-05-23 | Oxygen concentration controlling method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17192083A JPS6065704A (en) | 1983-09-17 | 1983-09-17 | How to control oxygen concentration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6065704A JPS6065704A (en) | 1985-04-15 |
| JPH0371362B2 true JPH0371362B2 (en) | 1991-11-13 |
Family
ID=15932292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17192083A Granted JPS6065704A (en) | 1983-08-31 | 1983-09-17 | How to control oxygen concentration |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6065704A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4260417B2 (en) * | 2001-05-23 | 2009-04-30 | ノバルティス アクチエンゲゼルシャフト | System and method for transporting and deoxygenating solutions |
| JP6289940B2 (en) * | 2014-03-04 | 2018-03-07 | 東芝ライフスタイル株式会社 | Oxygen reduction device and refrigerator |
| CN104535628A (en) * | 2014-12-18 | 2015-04-22 | 深圳市元征科技股份有限公司 | Method and device for acquiring gas concentration |
-
1983
- 1983-09-17 JP JP17192083A patent/JPS6065704A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6065704A (en) | 1985-04-15 |
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