JP2002096076A - Dissolved oxygen concentration regulating device and regulating method - Google Patents
Dissolved oxygen concentration regulating device and regulating methodInfo
- Publication number
- JP2002096076A JP2002096076A JP2000286589A JP2000286589A JP2002096076A JP 2002096076 A JP2002096076 A JP 2002096076A JP 2000286589 A JP2000286589 A JP 2000286589A JP 2000286589 A JP2000286589 A JP 2000286589A JP 2002096076 A JP2002096076 A JP 2002096076A
- Authority
- JP
- Japan
- Prior art keywords
- dissolved oxygen
- water
- oxygen concentration
- adjuster
- adjusting
- 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.)
- Withdrawn
Links
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、供給水中の溶存酸
素及びpHを調整する溶存酸素濃度調整装置及び調整方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for adjusting the concentration of dissolved oxygen in feed water.
【0002】[0002]
【背景技術】供給水中の溶存酸素を調整する方法とし
て、従来においては、図3に示すように、配管01中
に、O2 ボンベ02より直接酸素(O2 )を供給する方
法や、空気をエジェクタ等で供給する方法等が提案され
ている。BACKGROUND ART As a method for adjusting dissolved oxygen in supply water, conventionally, as shown in FIG. 3, a method of directly supplying oxygen (O 2 ) from a O 2 cylinder 02 into a pipe 01, or a method of adjusting air. A method of supplying the liquid by an ejector or the like has been proposed.
【0003】しかしながら、従来の酸素調整方法では、
以下のような問題がある。配管中の供給水の水量が低い
場合(例えば100ml/min)に低い溶存酸素濃度
を達成したい場合には、配管01内に外部より酸素ボン
ベ02から供給すると、ガス流量のコントロールが良好
でない場合に、過剰のO2 ガスを供給することとなる。However, in the conventional oxygen adjustment method,
There are the following problems. When it is desired to achieve a low dissolved oxygen concentration when the amount of the supply water in the pipe is low (for example, 100 ml / min), supplying the oxygen from the outside into the pipe 01 from the oxygen cylinder 02 can prevent the control of the gas flow rate. , An excess O 2 gas is supplied.
【0004】また、配管内の系統圧力が高い場合には、
ガスが縮みO2 ガスの注入が困難となり、一方系統圧力
が低い場合には、ガスが拡散し、O2 ガスの注入過多と
なるという問題がある。When the system pressure in the piping is high,
When the gas shrinks, it becomes difficult to inject the O 2 gas. On the other hand, when the system pressure is low, there is a problem that the gas diffuses and the injection of the O 2 gas becomes excessive.
【0005】よって、ガス流量のコントロールの精度の
高いものは高価であり、実験室レベルの装置には適用す
ることが容易ではないという問題もあるので、供給水中
の溶存酸素を低濃度で安定してしかも簡易な装置で供給
できることが臨まれている。[0005] Therefore, a gas with a high precision in controlling the gas flow rate is expensive and has a problem that it is not easy to apply to a laboratory-level device. Therefore, the dissolved oxygen in the feed water can be stabilized at a low concentration. Moreover, it is expected that it can be supplied by a simple device.
【0006】本発明は、以上述べた事情に鑑み、簡易な
構成でしかもpHの調整と共に酸素濃度も安定して調整
できる溶存酸素調整装置及び調整方法を提供することを
課題とする。SUMMARY OF THE INVENTION In view of the circumstances described above, an object of the present invention is to provide a dissolved oxygen adjusting device and an adjusting method which have a simple configuration and can stably adjust the oxygen concentration together with the pH adjustment.
【0007】[0007]
【課題を解決するための手段】前記課題を解決する本発
明の[請求項1]の溶存酸素濃度調整装置の発明は、恒
温槽内に設けた内部にpH調整剤を入れたタンクと、所
定温度のpH調整剤を一定量供給する供給ポンプとを具
備してなり、酸素を予め脱気手段により除去した供給水
中に、一定温度に保持されたpH調整剤を供給ポンプに
より供給し、供給水中の溶存酸素及びpHを調整するこ
とを特徴とする。According to a first aspect of the present invention, there is provided a dissolved oxygen concentration adjusting apparatus for solving the above-mentioned problems, comprising: A supply pump for supplying a constant amount of a temperature adjusting agent to the supply water from which oxygen has been removed in advance by a degassing means; Characterized in that the dissolved oxygen and pH are adjusted.
【0008】[請求項2]の発明は、請求項1におい
て、上記pH調整剤が塩酸,硝酸,硫酸,酢酸,水酸化
ナトリウム,水酸化カリウム,アンモニア水であること
を特徴とする。[0008] The invention of claim 2 is characterized in that in claim 1, the pH adjuster is hydrochloric acid, nitric acid, sulfuric acid, acetic acid, sodium hydroxide, potassium hydroxide, or aqueous ammonia.
【0009】[請求項3]の発明は、請求項1におい
て、上記pH調整剤がアンモニア水であり、調整後の供
給水のpHが7.0〜9.3、溶存酸素濃度が20〜2
00μg/リットルであることを特徴とする。The invention of claim 3 is the invention according to claim 1, wherein the pH adjuster is ammonia water, the pH of the adjusted supply water is 7.0 to 9.3, and the dissolved oxygen concentration is 20 to 2
It is characterized by being 00 μg / liter.
【0010】[請求項4]の溶存酸素濃度調整方法発明
は、酸素を予め脱気手段により除去した供給水中に、一
定温度に保持されたpH調整剤を供給ポンプにより供給
し、供給水中の溶存酸素及びpHを調整することを特徴
とする。According to a fourth aspect of the present invention, there is provided a method for adjusting the concentration of dissolved oxygen in a supply water from which oxygen has been previously removed by a degassing means, wherein a pH adjusting agent maintained at a constant temperature is supplied by a supply pump to dissolve the dissolved oxygen in the supply water. It is characterized by adjusting oxygen and pH.
【0011】[請求項5]の発明は、請求項4におい
て、上記pH調整剤が塩酸,硝酸,硫酸,酢酸,水酸化
ナトリウム,水酸化カリウム,アンモニア水であること
を特徴とする。[0011] The invention of claim 5 is characterized in that, in claim 4, the pH adjuster is hydrochloric acid, nitric acid, sulfuric acid, acetic acid, sodium hydroxide, potassium hydroxide, or aqueous ammonia.
【0012】[0012]
【発明の実施の形態】以下、本発明の実施形態を説明す
るが、本発明はこれに限定されるものではない。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described, but the present invention is not limited thereto.
【0013】[第1の実施の形態]図1は本実施の形態
にかかる溶存酸素調整装置の概略図である。本実施の形
態にかかる溶存酸素調整装置は、恒温槽10内に設けた
内部にアンモニア水11を入れたタンク12と、所定温
度のpH調整剤であるアンモニア水11を一定量供給す
る供給ポンプ13とを具備してなるものである。上記ア
ンモニア水11は温度が20℃の場合では、9000μ
g/リットルの酸素が溶存している。なお、必要に応じ
てタンク12内を空気14等でバブリングするようにし
てもよい。[First Embodiment] FIG. 1 is a schematic diagram of a dissolved oxygen adjusting apparatus according to the first embodiment. The dissolved oxygen adjusting apparatus according to the present embodiment includes a tank 12 containing an aqueous ammonia 11 provided in a constant temperature bath 10 and a supply pump 13 for supplying a predetermined amount of aqueous ammonia 11 as a pH adjuster at a predetermined temperature. Is provided. When the temperature of the aqueous ammonia 11 is 20 ° C., 9000 μm
g / liter of oxygen is dissolved. Note that the inside of the tank 12 may be bubbled with air 14 or the like as needed.
【0014】配管20内に供給される供給水21は、図
示しない純水装置により、pHが7.0に調整され、図
示しない脱気タンクにより、酸素が零の状態となってい
る。この状態の水を一定流量(100ml/min)供
給するところに、供給ポンプ13を用い、所定温度(例
えば20℃)で一定量の酸素(9000μg/リット
ル)を含むアンモニア水11を1cc/min供給(溶
存酸素量:9μg/ml)することで、pHを9とする
と共に、一定量の溶存酸素量(DO=90μg/リット
ル)とした供給水22のとすることができる。The supply water 21 supplied into the pipe 20 is adjusted to a pH of 7.0 by a pure water device (not shown), and oxygen is reduced to zero by a deaeration tank (not shown). To supply water in this state at a constant flow rate (100 ml / min), use a supply pump 13 to supply 1 cc / min of ammonia water 11 containing a fixed amount of oxygen (9000 μg / liter) at a predetermined temperature (for example, 20 ° C.). (Dissolved oxygen amount: 9 μg / ml), the pH of the supply water 22 can be adjusted to 9 and a fixed amount of dissolved oxygen (DO = 90 μg / liter).
【0015】図2にアンモニア水の温度と溶存酸素濃度
との関係を示す。FIG. 2 shows the relationship between the temperature of the aqueous ammonia and the concentration of dissolved oxygen.
【0016】これにより、pHの調整と溶存酸素濃度の
調整とが同時に行うことができ、CWT法を適用するボ
イラ給水の実機と同程度の条件を模擬できた実機構成材
へのスケールの付着する供給水を得ることができる。な
お、酸素濃度を急速に変化させたい場合には、タンク1
2中へ供給する酸素濃度を高くすることにより、行う。Thus, the adjustment of the pH and the concentration of the dissolved oxygen can be performed simultaneously, and the scale adheres to the components of the actual machine which can simulate the same conditions as those of the actual machine for boiler feed water to which the CWT method is applied. Feed water can be obtained. If the oxygen concentration needs to be changed rapidly, the tank 1
This is performed by increasing the concentration of oxygen supplied into the fuel cell 2.
【0017】本実施の形態では、pH調整剤としてアン
モニア水を用いたが、本発明ではこれに限定されるもの
ではなく、例えば塩酸,硝酸,硫酸,酢酸,水酸化ナト
リウム,水酸化カリウム等の公知のpH調整剤を行うも
のを用いることができる。In the present embodiment, ammonia water is used as the pH adjuster. However, the present invention is not limited to this. For example, hydrochloric acid, nitric acid, sulfuric acid, acetic acid, sodium hydroxide, potassium hydroxide, etc. A known pH adjuster can be used.
【0018】ここで、pHとO2 濃度を一度にコントロ
ールする場合において、pHはpH調整剤の濃度を希釈
又は濃くすることで容易に制御が可能である。Here, when controlling the pH and the O 2 concentration at once, the pH can be easily controlled by diluting or increasing the concentration of the pH adjuster.
【0019】また、下記「表1」、「表2」に示すよう
に、100リットル/分のような高給水量の場合には、
1111ml/分と、膨大な量のpH調整剤の供給が必
要となるので、それに伴い、大型のポンプやタンクが必
要となる。その為、大型事業用設備の場合は経済的に酸
素ガス+pH調整剤となる。As shown in Tables 1 and 2 below, when the water supply amount is as high as 100 liters / minute,
Since it is necessary to supply a huge amount of a pH adjuster of 1111 ml / min, a large pump and a tank are required. Therefore, in the case of a large business facility, it becomes an oxygen gas + pH adjuster economically.
【0020】[0020]
【表1】 [Table 1]
【表2】 [Table 2]
【0021】本発明によれば、ガス状態でO2 を供給す
るのでないので、制御が確実となり、安定してO2 の濃
度を調整することができる。さらに、ガスのような圧力
変動に起因する問題が解消される。According to the present invention, since O 2 is not supplied in a gaseous state, the control becomes reliable and the O 2 concentration can be adjusted stably. Further, problems caused by pressure fluctuations such as gas are eliminated.
【0022】よって、溶存酸素注入コントロールの精度
が高いものとなり、実験室レベルの装置に安価に適用す
ることができる。Accordingly, the control of the dissolved oxygen injection control becomes high, and it can be applied to a laboratory level device at low cost.
【0023】また、低流量の供給水に任意のpHの調整
と共に所定量の酸素を同時に供給することができる。In addition, a predetermined amount of oxygen can be simultaneously supplied to the low-flow-rate supply water while adjusting the pH.
【0024】[0024]
【発明の効果】以上、説明したように本発明の[請求項
1]の発明によれば、恒温槽内に設けた内部にpH調整
剤を入れたタンクと、所定温度のpH調整剤を一定量供
給する供給ポンプとを具備してなり、酸素を予め脱気手
段により除去した供給水中に、一定温度に保持されたp
H調整剤を供給ポンプにより供給し、供給水中の溶存酸
素及びpHを調整するので、供給水に任意のpHの調整
と共に所定量の酸素を同時に供給することができる。As described above, according to the first aspect of the present invention, as described above, a tank provided with a pH adjusting agent in a constant temperature bath and a pH adjusting agent at a predetermined temperature are fixed. And a supply pump for supplying a fixed amount of oxygen into the supply water from which oxygen has been removed in advance by degassing means.
Since the H adjuster is supplied by the supply pump and the dissolved oxygen and the pH in the supply water are adjusted, a predetermined amount of oxygen can be simultaneously supplied to the supply water together with the adjustment of an arbitrary pH.
【0025】[請求項2]の発明によれば、請求項1に
おいて、上記pH調整剤を塩酸,硝酸,硫酸,酢酸,水
酸化ナトリウム,水酸化カリウム,アンモニア水とする
ことで任意のpH調整が可能となる。According to the second aspect of the present invention, in the first aspect, the pH adjuster is selected from the group consisting of hydrochloric acid, nitric acid, sulfuric acid, acetic acid, sodium hydroxide, potassium hydroxide, and aqueous ammonia to adjust the pH. Becomes possible.
【0026】[請求項3]の発明によれば、請求項1に
おいて、上記pH調整剤がアンモニア水であり、調整後
の供給水のpHが7.0〜9.3、溶存酸素濃度が20
〜200μg/リットルであるので、CWT法の供給水
を模擬することができる。According to the third aspect of the present invention, in the first aspect, the pH adjuster is ammonia water, and the adjusted supply water has a pH of 7.0 to 9.3 and a dissolved oxygen concentration of 20.
Since it is 200200 μg / liter, it is possible to simulate the feed water of the CWT method.
【0027】[請求項4]の発明によれば、酸素を予め
脱気手段により除去した供給水中に、一定温度に保持さ
れたpH調整剤を供給ポンプにより供給し、供給水中の
溶存酸素及びpHを調整するので、供給水に任意のpH
の調整と共に所定量の酸素を同時に供給することができ
る。According to the fourth aspect of the present invention, the pH adjusting agent maintained at a constant temperature is supplied by the supply pump into the supply water from which oxygen has been previously removed by the degassing means, and the dissolved oxygen and the pH in the supply water are supplied. Adjust the pH of the feed water to any pH
And a predetermined amount of oxygen can be supplied simultaneously.
【0028】[請求項5]の発明によれば、請求項4に
おいて、上記pH調整剤を塩酸,硝酸,硫酸,酢酸,水
酸化ナトリウム,水酸化カリウム,アンモニア水とする
ことで任意のpH調整が可能となる。According to a fifth aspect of the present invention, in the fourth aspect, the pH adjusting agent is selected from the group consisting of hydrochloric acid, nitric acid, sulfuric acid, acetic acid, sodium hydroxide, potassium hydroxide, and ammonia water. Becomes possible.
【図1】本実施の形態にかかる溶存酸素濃度調整装置の
概略図である。FIG. 1 is a schematic diagram of a dissolved oxygen concentration adjusting device according to an embodiment.
【図2】アンモニア水の温度と溶存酸素濃度との関係図
である。FIG. 2 is a diagram showing the relationship between the temperature of ammonia water and the concentration of dissolved oxygen.
【図3】従来の溶存酸素濃度調整の概略図である。FIG. 3 is a schematic diagram of a conventional dissolved oxygen concentration adjustment.
10 恒温槽 11 アンモニア水 12 タンク 13 供給ポンプ 14 空気 20 配管 21 供給水 22 供給水(pH調整、O2 濃度調整)Reference Signs List 10 constant temperature bath 11 ammonia water 12 tank 13 supply pump 14 air 20 pipe 21 supply water 22 supply water (pH adjustment, O 2 concentration adjustment)
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI テーマコート゛(参考) C02F 1/66 521 C02F 1/66 521F 540 540Z B01F 1/00 B01F 1/00 A // C02F 1/00 C02F 1/00 K ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C02F 1/66 521 C02F 1/66 521F 540 540Z B01F 1/00 B01F 1/00 A // C02F 1/00 C02F 1/00 K
Claims (5)
れたタンクと、所定温度のpH調整剤を一定量供給する
供給ポンプとを具備してなり、 酸素を予め脱気手段により除去した供給水中に、一定温
度に保持されたpH調整剤を供給ポンプにより供給し、
供給水中の溶存酸素及びpHを調整することを特徴とす
る溶存酸素濃度調整装置。1. A constant temperature bath having a tank containing a pH adjuster therein and a supply pump for supplying a predetermined amount of the pH adjuster at a predetermined temperature, wherein oxygen is previously removed by a degassing means. In the supply water, a pH adjusting agent maintained at a constant temperature is supplied by a supply pump,
A dissolved oxygen concentration adjusting device for adjusting dissolved oxygen and pH in feed water.
リウム,水酸化カリウム,アンモニア水であることを特
徴とする溶存酸素濃度調整装置。2. The dissolved oxygen concentration adjusting device according to claim 1, wherein the pH adjusting agent is hydrochloric acid, nitric acid, sulfuric acid, acetic acid, sodium hydroxide, potassium hydroxide, or aqueous ammonia.
のpHが7.0〜9.3、溶存酸素濃度が20〜200
μg/リットルであることを特徴とする溶存酸素濃度調
整装置。3. The method according to claim 1, wherein the pH adjuster is ammonia water, the adjusted supply water has a pH of 7.0 to 9.3, and a dissolved oxygen concentration of 20 to 200.
A dissolved oxygen concentration adjusting device, wherein the concentration is μg / liter.
水中に、一定温度に保持されたpH調整剤を供給ポンプ
により供給し、供給水中の溶存酸素及びpHを調整する
ことを特徴とする溶存酸素濃度調整方法。4. Dissolved water is supplied by supplying a pH adjusting agent maintained at a constant temperature to a supply water from which oxygen has been removed by a degassing means in advance by a supply pump, and adjusting dissolved oxygen and pH in the supply water. Oxygen concentration adjustment method.
リウム,水酸化カリウム,アンモニア水であることを特
徴とする溶存酸素濃度調整方法。5. The method according to claim 4, wherein the pH adjuster is hydrochloric acid, nitric acid, sulfuric acid, acetic acid, sodium hydroxide, potassium hydroxide, or aqueous ammonia.
Priority Applications (1)
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JP2000286589A JP2002096076A (en) | 2000-09-21 | 2000-09-21 | Dissolved oxygen concentration regulating device and regulating method |
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Application Number | Priority Date | Filing Date | Title |
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JP2000286589A JP2002096076A (en) | 2000-09-21 | 2000-09-21 | Dissolved oxygen concentration regulating device and regulating method |
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JP2002096076A true JP2002096076A (en) | 2002-04-02 |
Family
ID=18770489
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107893752A (en) * | 2016-10-03 | 2018-04-10 | 天津有序环境科技发展有限公司 | Transform the ammonification pump equal control method of existing system |
-
2000
- 2000-09-21 JP JP2000286589A patent/JP2002096076A/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107893752A (en) * | 2016-10-03 | 2018-04-10 | 天津有序环境科技发展有限公司 | Transform the ammonification pump equal control method of existing system |
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