JP4296659B2 - Oxygen absorber - Google Patents
Oxygen absorber Download PDFInfo
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- JP4296659B2 JP4296659B2 JP31852299A JP31852299A JP4296659B2 JP 4296659 B2 JP4296659 B2 JP 4296659B2 JP 31852299 A JP31852299 A JP 31852299A JP 31852299 A JP31852299 A JP 31852299A JP 4296659 B2 JP4296659 B2 JP 4296659B2
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- gas
- water
- deoxygenation
- liquid separation
- nitrogen
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- Physical Water Treatments (AREA)
- Removal Of Specific Substances (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は脱酸素装置に係り、特に、スタティックミキサーを利用した省スペース、省エネルギーの窒素置換式脱酸素装置に関する。
【０００２】
【従来の技術】
ボイラ給水等の水処理分野では、水中の溶存酸素（ＤＯ）に起因する配管その他の機器系統の金属材料の腐食を防止するために、脱酸素処理が行われている。
【０００３】
従来、この脱酸素処理に用いられる脱酸素装置としては、次のようなものが提案されている。
▲１▼ 脱気膜による膜脱気装置
▲２▼ 水に窒素を注入混合して脱酸素する窒素置換式脱気装置
なお、特開昭５６−３７０１０号公報には、水をスタティックミキサーで乱流混合する脱気方法が提案されている。
【０００４】
【発明が解決しようとする課題】
上記従来の装置のうち、膜脱気装置では、装置コストが高くつく上に、処理効果の安定性、信頼性に問題があり、また操作面においても難がある。また、従来の窒素置換式脱気装置では、窒素と水との混合のために、攪拌機を備える混合槽が必要となるため、装置全体が大型化し、設置スペースが限られたボイラ室等への適用は困難であった。また、攪拌のためにモータを使用するため、電力費も高騰する。
【０００５】
特開昭５６−３７０１０号公報に記載される脱気方法は、スタティックミキサーを使用することで、装置の小型化、省エネルギー化が図れるが、この方法では、主に脱炭酸を目的としており、脱炭酸効率の向上のために空気を吹き込んでいることから、十分な脱酸素効果は得られない。しかも、この方法では、スタティックミキサーの上部の気液分離部で気液分離するのみであるため、気液分離効果の面でも不十分である。
【０００６】
本発明は上記従来の問題点を解決し、省スペース、省エネルギー化が可能で脱酸素効率にも優れた脱酸素装置を提供することを目的とする。
【０００７】
【課題を解決するための手段】
本発明の脱酸素装置は、送水管内に窒素ガスを注入する窒素注入手段と、窒素ガスが注入された水を乱流混合するスタティックミキサーと、乱流混合された水を気液分離する気液分離手段とを備えてなる脱酸素装置であって、複数基の前記スタティックミキサーが直列に配置されており、前記気液分離手段が前記送水管径の２〜３倍の径の管を垂直に設けて構成したものであり、かつ、該気液分離手段が減圧手段を有しないものであることを特徴とする。
【０００８】
本発明の脱酸素装置は、窒素と水とをスタティックミキサーで乱流混合すると共に気体の放散を行わせるものであり、混合槽が不要であるため、装置の小型化、省スペース化が図れる。また、攪拌機も不要で、混合のための動力が不要であるため、省エネルギー化を図れる。しかも、窒素を混合することで極めて効率的に酸素を除去することができる。
【０００９】
本発明の脱酸素装置では、特に、窒素注入手段、スタティックミキサー及び気液分離手段が直列に２組以上配置することで、酸素を極低濃度にまで効率的に除去することができる。
【００１０】
【発明の実施の形態】
以下に図面を参照して本発明の実施の形態を詳細に説明する。
【００１１】
図１は本発明の脱酸素装置の実施の形態を示す系統図である。
【００１２】
図１（ａ）の脱酸素装置は、送水管１内を流れる原水（被処理水）に窒素（Ｎ２）を注入し、この水をスタティックミキサー２に送水し、スタティックミキサー２内で乱流混合し、次いで気液分離ライン３で気液分離して窒素と酸素（Ｏ２）を系外へ排出すると共に、脱酸素処理水を取り出すものである。
【００１３】
本発明において、窒素の注入量は、多い程脱酸素効率を高めることができるが、過度に窒素注入量を多くしても処理コストに見合う脱酸素効率の向上効果は得られないことから、所望の酸素除去効率に応じて原水容量に対して１０〜５０容積％（窒素は常温、常圧の容積）程度とするのが好ましい。
【００１４】
また処理水温は０〜１００℃の範囲であれば良く、特に制限はないが、特に５０℃以上とすることで脱酸素効率を高めることができる。これは、このように水温を高めることにより、水蒸気圧が上昇し、水中に溶解している気体が放出され易くなるためである。
【００１５】
本発明において、スタティックミキサーとしては特に制限はなく、市販品を用いることができる。スタティックミキサーは、２台以上の複数台を直列に配置して用いる。
【００１６】
また、気液分離ラインとしては、送水管径の２〜３倍の径の管を０．５〜２ｍ垂直に設けて構成したものを用いる。このような気液分離ラインでは、溶存気体の分圧に従って気液分離が行われるため、主に注入した窒素と原水由来の酸素が効率的に分離除去される。
【００１７】
本発明の脱酸素装置では、図１（ｂ）に示す如く、窒素注入手段、スタティックミキサー２（図１（ｂ）では、３基のスタティックミキサー２Ａ，２Ｂ，２Ｃが直列に配置されている。）、気液分離ライン３を１セットとしたものを、直列に２段、或いは３段以上配置して用いても良く、このように多段配置とすることにより、より一層高度に酸素を除去することが可能となる。
【００１８】
本発明の脱酸素装置は、小型でコンパクトであり、広い設置スペースを必要としないことから、特にボイラ室のようなスペースに制約を受ける場所での使用に好適であり、この場合において、本発明の脱酸素装置を給水ラインに組み入れることにより、或いは、給水タンクと本発明の脱酸素装置とで水を循環処理することにより、効率的な脱酸素処理を行える。
【００１９】
【実施例】
以下に実施例及び比較例を挙げて本発明をより具体的に説明する。
【００２０】
実施例１〜６
図１（ｂ）に示す脱酸素装置により、表１に示すＤＯ濃度の原水を２．５ｍ３／ｈｒの処理水量で脱酸素処理した。なお、送水管１は２５Ａの配管であり、スタティックミキサー、気液分離ラインとしては、次のようなものを用いた。
【００２１】
スタティックミキサー：(株)ノリタケカンパニー製「３／４−Ｎ１０−３３３−１」
気液分離ライン ：５０Ａ，８０ｃｍ
この脱酸素装置において、窒素の注入量（１ヶ所当たりの注入量）及び水温を表１に示すように種々変えて処理を行い、各々の処理条件で得られた処理水のＤＯを調べ、結果を表１に示した。
【００２２】
【表１】
【発明の効果】
以上詳述した通り、本発明の脱酸素装置によれば、スタティックミキサーを利用した省スペース、省エネルギーの脱酸素装置であって、脱酸素効率に優れた窒素置換式脱酸素装置が提供される。
【００２４】
請求項２の脱酸素装置によれば、より一層脱酸素効率の向上を図ることができる。
【図面の簡単な説明】
【図１】本発明の脱酸素装置の実施の形態を示す系統図である。
【符号の説明】
１ 送水管
２ スタティックミキサー
３ 気液分離ライン[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a deoxygenation device, and more particularly, to a space-saving and energy-saving nitrogen-substitution deoxygenation device using a static mixer.
[0002]
[Prior art]
In the field of water treatment such as boiler feed water, deoxidation treatment is performed in order to prevent corrosion of metal materials in piping and other equipment systems caused by dissolved oxygen (DO) in water.
[0003]
Conventionally, as a deoxygenation apparatus used for this deoxygenation treatment, the following has been proposed.
(1) Membrane degassing device using degassing membrane (2) Nitrogen substitution type degassing device for deoxygenating by injecting nitrogen into water Mixing with a static mixer A degassing method with flow mixing has been proposed.
[0004]
[Problems to be solved by the invention]
Among the above-described conventional apparatuses, the membrane degassing apparatus has a high apparatus cost and has problems in stability and reliability of the processing effect and also in operation. In addition, in the conventional nitrogen substitution type deaeration apparatus, a mixing tank equipped with a stirrer is required for mixing nitrogen and water, so that the entire apparatus is enlarged and installed in a boiler room or the like where installation space is limited. Application was difficult. In addition, since the motor is used for stirring, the power cost also increases.
[0005]
The deaeration method described in JP-A-56-37010 can reduce the size and energy of the apparatus by using a static mixer, but this method is mainly intended for decarboxylation, Since air is blown in order to improve the carbonation efficiency, a sufficient deoxygenation effect cannot be obtained. Moreover, since this method only performs gas-liquid separation at the gas-liquid separation unit at the top of the static mixer, the effect of gas-liquid separation is also insufficient.
[0006]
An object of the present invention is to solve the above-mentioned conventional problems, and to provide a deoxygenation apparatus which can save space and energy and is excellent in deoxygenation efficiency.
[0007]
[Means for Solving the Problems]
The deoxygenation apparatus of the present invention includes a nitrogen injecting means for injecting nitrogen gas into a water supply pipe, a static mixer for turbulent mixing of water into which nitrogen gas has been injected, and a gas-liquid separation for gas-liquid separation of turbulent mixed water A plurality of static mixers arranged in series , wherein the gas-liquid separation means vertically extends a pipe having a diameter two to three times the water supply pipe diameter. are those which is configured by providing, and is characterized in der Rukoto those gas-liquid separating means does not have a pressure reducing means.
[0008]
The deoxygenation apparatus of the present invention turbulently mixes nitrogen and water with a static mixer and diffuses gas, and does not require a mixing tank. Therefore, the apparatus can be reduced in size and space can be saved. In addition, no agitator is required and no power for mixing is required, so that energy saving can be achieved. Moreover, oxygen can be removed very efficiently by mixing nitrogen.
[0009]
In the deoxygenation apparatus of the present invention, in particular, oxygen can be efficiently removed to an extremely low concentration by arranging two or more sets of nitrogen injection means, static mixers, and gas-liquid separation means in series.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0011]
FIG. 1 is a system diagram showing an embodiment of a deoxygenation apparatus of the present invention.
[0012]
The deoxygenation device in FIG. 1A injects nitrogen (N 2 ) into raw water (treated water) flowing in the water pipe 1, feeds this water to the
[0013]
In the present invention, the greater the nitrogen injection amount, the higher the deoxygenation efficiency can be. However, even if the nitrogen injection amount is excessively increased, the effect of improving the deoxygenation efficiency corresponding to the processing cost cannot be obtained. Depending on the oxygen removal efficiency, the volume is preferably about 10 to 50% by volume (nitrogen is room temperature, normal pressure) with respect to the raw water capacity.
[0014]
The treatment water temperature may be in the range of 0 to 100 ° C., and is not particularly limited. However, the deoxygenation efficiency can be enhanced by setting the treatment water temperature to 50 ° C. or more. This is because by increasing the water temperature in this way, the water vapor pressure rises and the gas dissolved in the water is easily released.
[0015]
In the present invention, the static mixer is not particularly limited, and a commercially available product can be used. Static mixer, Ru used by arranging a plurality of two or more boards in series.
[0016]
As the gas-liquid separation line, Ru with those formed by providing the
[0017]
In the deoxygenation apparatus of the present invention, as shown in FIG. 1 (b), nitrogen injection means and static mixer 2 (in FIG. 1 (b), three
[0018]
The deoxygenation apparatus of the present invention is small and compact, and does not require a large installation space, and therefore is particularly suitable for use in a place that is restricted by a space such as a boiler room. By incorporating the deoxygenation device in the water supply line, or by circulating water through the water supply tank and the deoxygenation device of the present invention, efficient deoxygenation treatment can be performed.
[0019]
【Example】
Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples.
[0020]
Examples 1-6
The deoxygenation apparatus shown in FIG. 1B was used to deoxygenate raw water having a DO concentration shown in Table 1 with a treated water amount of 2.5 m 3 / hr. The water supply pipe 1 is a 25A pipe, and the following were used as the static mixer and the gas-liquid separation line.
[0021]
Static mixer: “3 / 4-N10-333-1” manufactured by Noritake Company
Gas-liquid separation line: 50A, 80cm
In this deoxygenation apparatus, the treatment was performed with various changes in the nitrogen injection amount (injection amount per location) and the water temperature as shown in Table 1, and the treated water DO obtained under each processing condition was examined. Are shown in Table 1.
[0022]
[Table 1]
【The invention's effect】
As described above in detail, according to the deoxygenation apparatus of the present invention, a nitrogen-substituting type deoxygenation apparatus that is a space-saving and energy-saving deoxygenation apparatus using a static mixer and excellent in deoxygenation efficiency is provided.
[0024]
According to the deoxygenation apparatus of
[Brief description of the drawings]
FIG. 1 is a system diagram showing an embodiment of a deoxygenation apparatus of the present invention.
[Explanation of symbols]
1
Claims (1)
窒素ガスが注入された水を乱流混合するスタティックミキサーと、
乱流混合された水を気液分離する気液分離手段とを備えてなる脱酸素装置であって、複数基の前記スタティックミキサーが直列に配置されており、前記気液分離手段が前記送水管径の２〜３倍の径の管を垂直に設けて構成したものであり、かつ、該気液分離手段が減圧手段を有しないものであることを特徴とする脱酸素装置。Nitrogen injection means for injecting nitrogen gas into the water pipe;
A static mixer that turbulently mixes water into which nitrogen gas has been injected;
A deoxygenation device comprising a gas-liquid separation means for gas-liquid separation of turbulent mixed water, wherein a plurality of the static mixers are arranged in series, and the gas-liquid separation means serves as the water pipe and a two to three times the diameter of the tube of the diameter of those constructed by vertically arranged, and deoxygenation device gas-liquid separating means, characterized in der Rukoto having no decompression means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31852299A JP4296659B2 (en) | 1999-11-09 | 1999-11-09 | Oxygen absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31852299A JP4296659B2 (en) | 1999-11-09 | 1999-11-09 | Oxygen absorber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001129304A JP2001129304A (en) | 2001-05-15 |
| JP4296659B2 true JP4296659B2 (en) | 2009-07-15 |
Family
ID=18100061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31852299A Expired - Fee Related JP4296659B2 (en) | 1999-11-09 | 1999-11-09 | Oxygen absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4296659B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003244309A1 (en) * | 2002-06-20 | 2004-01-06 | Kyushu Tlo Company, Limited | Method of separating dissolved gas and separating apparatus |
| JP4714597B2 (en) * | 2006-02-15 | 2011-06-29 | 株式会社イーズ | Deaerator |
| JP4820774B2 (en) * | 2007-04-20 | 2011-11-24 | 山陽電子工業株式会社 | Dissolved oxygen remover |
| JP2011230031A (en) * | 2010-04-26 | 2011-11-17 | Kurita Water Ind Ltd | Nitrogen substitution type deoxygenation device and nitrogen substitution type deoxygenation method |
| JP5817081B2 (en) * | 2013-12-17 | 2015-11-18 | 株式会社ゼックフィールド | Dissolved oxygen remover |
| JP6290016B2 (en) * | 2014-06-27 | 2018-03-07 | 東京エレクトロン株式会社 | Substrate liquid processing apparatus, substrate liquid processing method, and storage medium |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2836821B2 (en) * | 1988-06-20 | 1998-12-14 | 大阪酸素工業株式会社 | Method for removing dissolved oxygen from raw water used for beverages |
| JP2877923B2 (en) * | 1990-09-07 | 1999-04-05 | オルガノ株式会社 | Removal method of dissolved gas in liquid |
| JPH05184811A (en) * | 1991-12-27 | 1993-07-27 | Iwatani Internatl Corp | Method for removing oxygen in liquid |
| JP2783500B2 (en) * | 1993-11-10 | 1998-08-06 | オリオン機械株式会社 | How to remove volatile substances |
| JPH07163998A (en) * | 1993-12-14 | 1995-06-27 | Sato Kogyo Co Ltd | Treatment of muddy water and device therefor |
| JPH10236850A (en) * | 1997-02-27 | 1998-09-08 | Fujikura Ltd | Coating resin solution feeding unit |
-
1999
- 1999-11-09 JP JP31852299A patent/JP4296659B2/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| JP2001129304A (en) | 2001-05-15 |
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