JP3437787B2 - Underwater aerator air supply system - Google Patents
Underwater aerator air supply systemInfo
- Publication number
- JP3437787B2 JP3437787B2 JP10713699A JP10713699A JP3437787B2 JP 3437787 B2 JP3437787 B2 JP 3437787B2 JP 10713699 A JP10713699 A JP 10713699A JP 10713699 A JP10713699 A JP 10713699A JP 3437787 B2 JP3437787 B2 JP 3437787B2
- Authority
- JP
- Japan
- Prior art keywords
- baffle plate
- air
- air supply
- bubbles
- aerator
- 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.)
- Expired - Fee Related
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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、工場廃水や都市下
水等の廃水処理において曝気槽内に設置される水中エア
レータの給気装置に係わるものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air supply device for an underwater aerator installed in an aeration tank in treating wastewater such as factory wastewater and municipal wastewater.
【０００２】[0002]
【従来の技術】従来、曝気槽の槽底に設置される水中エ
アレータは、水槽の深さの増大に伴って気泡の滞留時間
が増え曝気効率が向上するメリットがある反面、静水圧
が増えるためエアレータ内への大気の吸引が難しくなる
問題があった。2. Description of the Related Art Conventionally, a submersible aerator installed on the bottom of an aeration tank has the merit that the retention time of bubbles increases as the depth of the water tank increases and the aeration efficiency increases, but the hydrostatic pressure increases. There is a problem that it is difficult to suck the air into the aerator.
【０００３】[0003]
【発明が解決しようとする課題】エアレータの曝気効果
を高めるためには、可及的に大量の空気を吸引すると共
に気泡を微細化して比表面積を増すことにより、気液接
触を増大させる必要がある。しかしながら気泡滞留時間
の増大と気泡の圧縮微細化を図る目的でエアレータを深
槽に設けるとエアレータの空気供給部の静水圧が高くな
るので、加圧空気を用いずに大気吸引だけで大量の空気
を供給することが困難になる。In order to enhance the aeration effect of the aerator, it is necessary to increase the gas-liquid contact by sucking as much air as possible and making the bubbles finer to increase the specific surface area. is there. However, if an aerator is installed in the deep tank for the purpose of increasing the bubble retention time and compressing and refining the bubbles, the hydrostatic pressure of the air supply part of the aerator will increase, so a large amount of air will not be sucked in without using pressurized air. Will be difficult to supply.
【０００４】以上に鑑み本発明は、深槽内に設けた水中
エアレータにおいて、加圧空気を用いずに大気の吸引の
みで大量の空気を供給し得るのみならず、気泡の微細化
をも可能にして曝気効果を高め得るような、高性能の給
気装置を提供しようとするものである。In view of the above, according to the present invention, in an underwater aerator provided in a deep tank, a large amount of air can be supplied only by suction of the atmosphere without using pressurized air, and bubbles can be made fine. Therefore, it is intended to provide a high performance air supply device capable of enhancing the aeration effect.
【０００５】[0005]
【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、羽根外周の出口近傍の吐出しケーシング
に、流水に面して流れを遮る邪魔板を設けると共に、該
邪魔板の背面から空気を供給することを特徴とする、水
中エアレータの給気装置である。In order to achieve the above object, the present invention provides a discharge casing near the outlet of the outer circumference of a blade with a baffle plate which faces the running water and blocks the flow, and the back face of the baffle plate. An air supply device for an underwater aerator, characterized in that air is supplied from the air supply device.
【０００６】また請求項２に記載の発明は、請求項１に
記載の発明において、邪魔板内部に空洞を設け、邪魔板
の流水背面に該空洞と通ずる多数の孔を設けたことを特
徴とする、水中エアレータの給気装置である。According to a second aspect of the present invention, in the first aspect of the invention, a cavity is provided inside the baffle plate, and a large number of holes communicating with the cavity are provided on the back surface of the baffle plate under flowing water. It is an air supply device for an underwater aerator.
【０００７】[0007]
【発明の実施の形態】本発明の実施の形態について図面
を参照して説明する。図１は本発明の実施例の断面図、
図２は図１のＳ部の拡大図、図３の（Ａ）は図２のＸ−
Ｘ断面図、（Ｂ）は図２の視矢Ｑから見た図、図４は他
の実施例で図１のＳ部に相当する部分Ｓ′の拡大図、図
５（Ａ）は図４のＹ−Ｙ断面図、（Ｂ）は図４の視矢Ｐ
から見た図、をそれぞれ示す。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. 1 is a sectional view of an embodiment of the present invention,
2 is an enlarged view of the S portion of FIG. 1, and FIG. 3A is X- of FIG.
2 is a sectional view taken along the line X, FIG. 4 is an enlarged view of a portion S'corresponding to the portion S in FIG. 1 in another embodiment, and FIG. 4 is a cross-sectional view taken along line Y-Y of FIG.
The figure seen from each is shown.
【０００８】図１〜図３において、エアレータの羽根１
は上カバー９に搭載された水中モーター１０により軸１
１を介して駆動される。上カバー９は吐出しケーシング
３上に固定され、吐出しケーシング３は槽底１２にセッ
トされた下部ケーシング１３に搭載されている。羽根１
を駆動すると、下部ケーシングの固定ベーン１４から導
入された水槽内の原水１５は、給気装置Ｓで空気を供給
され、吐出しケーシング３の出口１６から気泡を含んだ
水１７となって水槽内に放出される。1 to 3, the blade 1 of the aerator is shown.
Is a shaft 1 driven by a submersible motor 10 mounted on the upper cover 9.
Driven through 1. The upper cover 9 is fixed on the discharge casing 3, and the discharge casing 3 is mounted on the lower casing 13 set on the tank bottom 12. Feather 1
When water is driven, the raw water 15 in the water tank introduced from the fixed vanes 14 of the lower casing is supplied with air by the air supply device S, and is discharged and becomes water 17 containing bubbles from the outlet 16 of the casing 3 into the water tank. Is released to.
【０００９】しかして吐出しケーシング３には羽根１の
外周出口２の近傍に邪魔板５を設けると共に、邪魔板５
の背面には空気室１８及び空気配管１９を介して大気に
連通せしめた空気供給孔６を設けてある。邪魔板５の遮
蔽効果を最適ならしめるために軸線に対する邪魔板５の
傾斜角は、羽根出口における旋回速度成分７に対する羽
根出口の流水４の傾斜角θと同一にして、邪魔板５の面
が羽根出口の流水４とほぼ垂直になるようにするとよ
い。尚、図中８は羽根出口の流水４の軸流速度成分を表
す。Therefore, the discharge casing 3 is provided with a baffle plate 5 in the vicinity of the outer peripheral outlet 2 of the blade 1 and the baffle plate 5
An air supply hole 6 communicated with the atmosphere via an air chamber 18 and an air pipe 19 is provided on the back surface of the. In order to optimize the shielding effect of the baffle plate 5, the inclination angle of the baffle plate 5 with respect to the axis is made equal to the inclination angle θ of the flowing water 4 at the blade outlet with respect to the swirl velocity component 7 at the blade outlet so that the surface of the baffle plate 5 is It is advisable to make it substantially vertical to the running water 4 at the blade outlet. In the figure, 8 represents the axial flow velocity component of the flowing water 4 at the blade outlet.
【００１０】以上の構成において羽根１を駆動すると、
羽根の外周出口２の近傍における羽根出口の流水４は邪
魔板５に衝突して、邪魔板５の背面が減圧されると同時
に渦流２０を発生する。この減圧効果によって大気は空
気配管１９、空気室１８を経て空気供給孔６から吸引さ
れて気泡を発生し、さらにその気泡は渦流２０の剪断作
用により微細化されて気泡の比表面積は増加する。When the blade 1 is driven in the above structure,
The flowing water 4 at the blade outlet near the outer peripheral outlet 2 of the blade collides with the baffle plate 5, the back surface of the baffle plate 5 is depressurized, and at the same time a swirl 20 is generated. Due to this decompression effect, the atmosphere is sucked from the air supply hole 6 through the air pipe 19 and the air chamber 18 to generate bubbles, and the bubbles are atomized by the shearing action of the vortex 20 to increase the specific surface area of the bubbles.
【００１１】また他の実施例を示す図４〜図５において
は、邪魔板５′の断面を三角形として内部に設けた空洞
２１を空気室１８と連通せしめると共に、邪魔板５′の
流水背面には小さな空気供給孔６′を多数設けてある。
尚、ここでは製造を容易ならしめる目的で邪魔板５′の
傾斜角をθ＝０としている。以上により、前記同様のメ
カニズムで大気は空気供給孔６′から邪魔板５′の背面
に吸引されるが、この際、空気は多数の孔から分散供給
されるので、気泡の微細化はより一層容易となる。In FIGS. 4 to 5 showing another embodiment, a cavity 21 having a triangular cross section of the baffle plate 5'is made to communicate with the air chamber 18, and the baffle plate 5'is provided on the rear surface of the flowing water. Has a large number of small air supply holes 6 '.
Here, the inclination angle of the baffle plate 5'is set to .theta. = 0 for the purpose of facilitating the manufacture. As described above, the atmosphere is sucked from the air supply hole 6'to the back surface of the baffle plate 5'by the same mechanism as described above. At this time, since the air is dispersed and supplied from a large number of holes, the bubbles are further miniaturized. It will be easy.
【００１２】[0012]
【発明の効果】本発明は、上述のとおり構成されている
ので、次に記載する効果を奏する。Since the present invention is configured as described above, it has the following effects.
【００１３】請求項１の装置においては、気泡滞留時間
の増大と気泡の圧縮微細化を図る目的でエアレータを深
槽に設けても、加圧空気を用いずに大気の吸引のみで大
量の空気を吸引し得るのみならず、気泡の微細化をも可
能にするので、高性能の曝気装置を提供することができ
る。In the apparatus of the first aspect, even if an aerator is provided in the deep tank for the purpose of increasing the residence time of the bubbles and making the bubbles finer by compression, a large amount of air is only sucked into the atmosphere without using pressurized air. Not only can the air be sucked, but also the bubbles can be made finer, so that a high-performance aerator can be provided.
【００１４】請求項２の装置においては、大気から吸引
された空気が多数の孔から分散供給されるので、気泡の
微細化がより一層容易となる。In the apparatus according to the second aspect, the air sucked from the atmosphere is dispersed and supplied through a large number of holes, so that the bubbles can be further miniaturized.
【図１】本発明の実施例の断面図である。FIG. 1 is a sectional view of an embodiment of the present invention.
【図２】図１のＳ部の拡大図である。FIG. 2 is an enlarged view of a portion S in FIG.
【図３】（Ａ）は図２のＸ−Ｘ断面図、（Ｂ）は図２の
視矢Ｑから見た図、をそれぞれ示す。3A is a cross-sectional view taken along line XX of FIG. 2, and FIG. 3B is a view seen from a viewing arrow Q of FIG.
【図４】本発明の他の実施例で、図１のＳ部に相当する
部分Ｓ′の拡大図である。4 is an enlarged view of a portion S'corresponding to the portion S in FIG. 1 according to another embodiment of the present invention.
【図５】（Ａ）は図４のＹ−Ｙ断面図、（Ｂ）は図４の
視矢Ｐから見た図、をそれぞれ示す。5A is a cross-sectional view taken along line YY of FIG. 4, and FIG. 5B is a view seen from a viewing arrow P of FIG.
Ｓ，Ｓ′ 給気装置 １ 羽根 ２ 羽根の外周出口 ３ 吐出しケーシング ４ 羽根出口の流水 ５，５′ 邪魔板 ６，６′ 空気供給孔 ７ 旋回速度成分 ９ 上カバー １０ 水中モーター １２ 槽底 １３ 下部ケーシング １５ 水槽内の原水 １７ 気泡を含んだ水 １８ 空気室 １９ 空気配管 ２０ 渦流 ２１ 空洞 S, S 'Air supply device 1 feather 2 Outer edge of blade 3 Discharge casing 4 Running water at the blade outlet 5,5 'baffle 6,6 'Air supply hole 7 Turning speed component 9 Top cover 10 underwater motor 12 bottom 13 Lower casing Raw water in the aquarium 17 Water containing air bubbles 18 air chamber 19 Air piping 20 whirlpool 21 cavity
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) C02F 3/14 - 3/26 B01F 3/04 B01F 7/00 - 7/32 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) C02F 3/14-3/26 B01F 3/04 B01F 7/00-7/32
Claims (2)
に、流水に面して流れを遮る邪魔板を設けると共に、該
邪魔板の背面から空気を供給することを特徴とする、水
中エアレータの給気装置。1. A submersible aerator supply device, characterized in that a discharge casing near the outlet of the outer periphery of the blade is provided with a baffle plate facing the running water to block the flow, and air is supplied from the back face of the baffle plate. Qi device.
背面に該空洞と通ずる多数の孔を設けたことを特徴とす
る、請求項１に記載の水中エアレータの給気装置。2. The air supply device for an underwater aerator according to claim 1, wherein a cavity is provided inside the baffle plate, and a large number of holes communicating with the cavity are provided on a back surface of the baffle plate under flowing water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10713699A JP3437787B2 (en) | 1999-04-14 | 1999-04-14 | Underwater aerator air supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10713699A JP3437787B2 (en) | 1999-04-14 | 1999-04-14 | Underwater aerator air supply system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000301189A JP2000301189A (en) | 2000-10-31 |
| JP3437787B2 true JP3437787B2 (en) | 2003-08-18 |
Family
ID=14451431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10713699A Expired - Fee Related JP3437787B2 (en) | 1999-04-14 | 1999-04-14 | Underwater aerator air supply system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3437787B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4987811B2 (en) * | 2008-07-10 | 2012-07-25 | 株式会社日立プラントテクノロジー | Aeration stirrer |
| KR100899379B1 (en) * | 2008-09-26 | 2009-05-26 | 주식회사 유천엔바이로 | Aerator |
-
1999
- 1999-04-14 JP JP10713699A patent/JP3437787B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000301189A (en) | 2000-10-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| LAPS | Cancellation because of no payment of annual fees |