JPH0268195A - Aeration device - Google Patents
Aeration deviceInfo
- Publication number
- JPH0268195A JPH0268195A JP63219916A JP21991688A JPH0268195A JP H0268195 A JPH0268195 A JP H0268195A JP 63219916 A JP63219916 A JP 63219916A JP 21991688 A JP21991688 A JP 21991688A JP H0268195 A JPH0268195 A JP H0268195A
- Authority
- JP
- Japan
- Prior art keywords
- stirring
- stirring blade
- shaft
- blade
- aeration
- 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
- 238000005273 aeration Methods 0.000 title claims abstract description 24
- 238000003756 stirring Methods 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002351 wastewater Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005381 potential energy Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract 1
- 238000009423 ventilation Methods 0.000 description 8
- 239000010865 sewage Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000003466 welding Methods 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
- 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)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は下水処理場、ポンプ場のポンプ井、およびビル
内のビル地下排水槽等の汚水を貯留する槽内に設置され
、かつ汚水を攪拌しつつこれに空気を供給し、空気の溶
解率を向上させ、曝気効果の向上を図るようになした曝
気装置に間するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is installed in a tank for storing sewage, such as a sewage treatment plant, a pump well in a pumping station, or an underground drainage tank in a building. This is installed in an aeration device that supplies air while stirring to improve the dissolution rate of air and improve the aeration effect.
この種の曝気装置として特開昭６２−６８５９０号公報
に開示されたものがある。この曝気原理はベルヌイの定
理を応用したものである。ベルヌイの定理は（１）式で
表わされる。An example of this type of aeration device is disclosed in Japanese Patent Application Laid-Open No. 62-68590. This aeration principle is an application of Bernoulli's theorem. Bernoulli's theorem is expressed by equation (1).
Ｐ： 流線上の１点での圧力
Ｖ： 流速
Ｚ： 基準水面からの高さ
（り１式第１項は、圧力エネルギー 第２項は速度エネ
ルギー、第３項は位置エネルギーを表わし、流体運動に
おいて王者の総和は一定であることを示す。P: Pressure at one point on the streamline V: Flow velocity Z: Height from the reference water surface Show that the sum of the champions is constant.
この曝気装置は攪拌羽根先端の流速を高めることにより
速度エネルギーを増加させ、これに伴い位置エネルギー
はほぼ一定と考えられるため圧力エネルギーが減少し負
圧になる。この負圧によって空気を自給することができ
る。This aeration device increases the velocity energy by increasing the flow velocity at the tip of the stirring blade, and as the potential energy is considered to be approximately constant, the pressure energy decreases and becomes negative pressure. This negative pressure allows for self-supply of air.
この汚水中に発生した負圧によって汚水中に放射された
空気は中空軸先端の開口付近の攪拌羽根の回転と、これ
によって生じる汚水の過流によって剪断され、微細気泡
となる。しかし中空軸の先端開口部は水中に直接間口し
ているので第４図に示すように攪拌羽根で攪拌され、渦
流となって羽根より押し出され、渦流の一部は中空軸外
周部より中心部の軸心方向へと戻り水流となり、これが
ため曝気効果を損ねている。The air radiated into the waste water by the negative pressure generated in the waste water is sheared by the rotation of the stirring blade near the opening at the tip of the hollow shaft and the resulting overflow of waste water, and becomes fine bubbles. However, since the tip opening of the hollow shaft opens directly into the water, it is stirred by the stirring blade as shown in Figure 4, and a vortex is pushed out from the blade, and a part of the vortex flows from the outer periphery of the hollow shaft to the center. The water flows back toward the axis of the pump, which impairs the aeration effect.
本発明の目的はこの戻り水流を防止して、空気を汚水に
多く放出させ曝気効果を向上せしめることである。The purpose of the present invention is to prevent this return water flow and release more air into the wastewater to improve the aeration effect.
攪拌羽根を攪拌軸の間口孔より突出して設けると共に、
戻り水流を防止する整流板を設ける。The stirring blade is provided to protrude from the frontage hole of the stirring shaft, and
Install a rectifier plate to prevent return water flow.
以下本発明曝気装置の実施例を図面に基づいて説明する
。Embodiments of the aeration device of the present invention will be described below based on the drawings.
図においてｌはビルの最地階層に所要容積を有するよう
に設けた排水槽、その地汚水を処理すべくなした排水槽
で、この排水槽１の槽底２の所要位置にｌＩ！気装置３
を設置する。この曝気装置３は水中モータ４と、攪拌羽
根５と、モータ軸の反出力側に設けた通気管７とよりな
っている。In the figure, l is a drainage tank installed to have the required volume on the lowest floor of the building, and is designed to treat the ground sewage. Air device 3
Set up. This aeration device 3 includes a submersible motor 4, a stirring blade 5, and a ventilation pipe 7 provided on the opposite side of the motor shaft.
水中モータ４は油圧配管又はケーブル６にて油圧式・電
動式その他の動力源に接続され駆動されるもので、この
氷中モータ４の中空状のモータ軸４１の先端に同様に中
空状の攪拌軸５】を直結固定する。攪拌羽根５は中空状
の軸５】の外周に螺旋状その他曝気に適した形状を有す
る攪拌羽根５２の先端部を攪拌軸の間口より突出して設
ける。The submersible motor 4 is connected to a hydraulic, electric, or other power source via hydraulic piping or a cable 6, and is driven by a hollow motor shaft 41. Directly connect and fix shaft 5. The stirring blade 5 is provided with a tip portion of a stirring blade 52 having a spiral shape or other shape suitable for aeration on the outer periphery of a hollow shaft 5 and protruding from the frontage of the stirring shaft.
前記水中モータ４のモータ軸４１は所要の断面積を有す
る通気孔４２を穿設した中空状とし、該モータ軸内を通
気可能とすると共に、この水中モータ軸４１の反出力側
すなわち反攪拌羽根側に通気管７を連設し、通気管７の
先端を常に水面より上方位置にあるように配設し、この
通気管７を経て攪拌軸の通気孔４２と導通させ、かつこ
のモータ軸内より攪拌羽根軸内を通気可能とするもので
ある。The motor shaft 41 of the submersible motor 4 is hollow with a ventilation hole 42 having a required cross-sectional area, so that the interior of the motor shaft can be ventilated. A ventilation pipe 7 is connected to the side, and the tip of the ventilation pipe 7 is arranged so that it is always above the water surface, and the ventilation pipe 7 is connected to the ventilation hole 42 of the stirring shaft, and the inside of this motor shaft is connected to the ventilation hole 42 of the stirring shaft. This makes it possible to ventilate the interior of the stirring blade shaft.
なお図中９は中空状モータ軸及び攪拌羽根軸を軸支した
メカニカルシールである。Note that 9 in the figure is a mechanical seal that pivotally supports the hollow motor shaft and the stirring blade shaft.
また前記攪拌羽根本体５２の先端部に戻り水流を防止す
る整流板を設ける。つまり中空状の攪拌軸５１の閉口と
所要の間隔をおいて対向する整流板８を設ける。この整
流板８はその外周＃ｌ紗を攪拌羽根本体５２と接する位
置で攪拌軸５１の間口面積より大きなものとし、溶着そ
の他にて固定し、羽根と一体とする。勿論この場合、軸
端間口と整流板８との間には所定の隙間Ｃが形成され、
汚水中に発生する負圧を利用して該攪拌軸５１内を通過
する空気を汚水中へ放出されるようになす。Further, a current plate is provided at the tip of the stirring blade main body 52 to prevent water from flowing back. That is, the current plate 8 is provided to face the closed end of the hollow stirring shaft 51 with a required spacing therebetween. This rectifier plate 8 has an outer circumference #l gauze larger than the frontage area of the stirring shaft 51 at the position where it contacts the stirring blade base body 52, and is fixed by welding or other means to be integrated with the blade. Of course, in this case, a predetermined gap C is formed between the shaft end frontage and the current plate 8,
The air passing through the stirring shaft 51 is released into the waste water by utilizing the negative pressure generated in the waste water.
これまで水中内での水中モータによる曝気装置について
述べたが、水上部にモータを設け、モータに直結した中
空状の駆動軸を通じて液体に空気を吹き込む方式の曝気
装置に同様の整流板を設けることも可能である。So far, we have described an aeration system that uses a submersible motor underwater, but it is also possible to install a similar rectifying plate in an aeration system that uses a motor above the water and blows air into the liquid through a hollow drive shaft that is directly connected to the motor. is also possible.
上述のように構成される曝気１ｉｉ［における作動につ
いて説明する。The operation in aeration 1ii[ configured as described above will be explained.
曝気装置の駆動により水中モータの回動は直接攪拌羽根
５に伝達される。攪拌羽根δの回動にて攪拌羽根先端付
近の流速は高められ、これにより速度エネルギーを増加
させられる。それに伴い位置エネルギーはほぼ一定と考
えられるため圧力エネルギーが減少し負圧となる。この
負圧により中空状の攪拌軸及び水中モータ軸を介して通
気管７にて供給される空気を吸引し、羽根にて微細化さ
れ、水中に攪拌放出される。勿論該羽根にて水も攪拌さ
れ、これにより曝気が行なわれる。The rotation of the underwater motor is directly transmitted to the stirring blade 5 by driving the aeration device. The rotation of the stirring blade δ increases the flow velocity near the tip of the stirring blade, thereby increasing velocity energy. Along with this, the potential energy is considered to be approximately constant, so the pressure energy decreases and becomes negative pressure. This negative pressure sucks the air supplied through the vent pipe 7 through the hollow stirring shaft and the underwater motor shaft, atomizes it with the blades, and stirs and releases it into the water. Of course, the water is also stirred by the blades, and aeration is thereby performed.
この空気が水中に放出されるとき、軸端間口孔より突出
して設ける攪拌羽根に整流板８が設けられているため、
この空気の気泡は整流板、軸端の隙間より軸外周方向へ
放出された後渦流となって羽根先端より前方へ押し出さ
れる。さらにこの整流板にて戻り水流が防止されので、
空気が水中に多く放出され、曝気効果が向上させられる
ものとなる。また、戻り水流にてし壇等の夾雑物が攪拌
羽根や攪拌軸にからみ付くのを防止する効果を有する。When this air is released into the water, the current plate 8 is provided on the stirring blade that protrudes from the shaft end opening.
These air bubbles are released toward the outer circumferential direction of the shaft through the gap between the current plate and the shaft end, and then become a vortex and are pushed forward from the blade tips. Furthermore, this rectifying plate prevents the return water flow,
A large amount of air is released into the water, and the aeration effect is improved. In addition, it has the effect of preventing foreign matter such as dirt from being entangled with the stirring blades and stirring shaft by the return water flow.
本発明によるときは、攪拌羽根を攪拌軸の間口孔より突
出して設け、前記攪拌羽根に戻り水流を防止する整流板
を設けているため、羽根の回転により生じる戻り水流が
防止され、これにより曝気効果を向上せしめられる利点
を有する。According to the present invention, the stirring blade is provided to protrude from the frontage hole of the stirring shaft, and the stirring blade is provided with a rectifier plate that prevents the water flow from returning, so that the return water flow caused by the rotation of the blade is prevented, thereby aeration. It has the advantage of improving effectiveness.
第１図は一部破断したる正面図、第２図は攪拌羽根本体
の側面図、第３図は同正面図、第４図は従来例の説明図
である。
ｌは排水槽、３は曝気装置、４は水中モータ、５は攪拌
羽根、５１は攪拌軸、５２は攪拌羽根本体、６３は中空
孔、７は通気管、８は整流板、９はメカニカルシール。
ほか１名FIG. 1 is a partially cutaway front view, FIG. 2 is a side view of the stirring blade body, FIG. 3 is a front view of the same, and FIG. 4 is an explanatory diagram of a conventional example. 1 is a drainage tank, 3 is an aeration device, 4 is a submersible motor, 5 is a stirring blade, 51 is a stirring shaft, 52 is a stirring blade base body, 63 is a hollow hole, 7 is a ventilation pipe, 8 is a rectifier plate, 9 is a mechanical seal . 1 other person
Claims (1)
を取り付け、水上部に空気を攪拌軸を通じて汚水に供給
させる曝気装置において、前記攪拌羽根を、その先端が
前記攪拌軸の開口より突出するよう設けると共に、前記
攪拌羽根に中空軸外周部より中心部の軸心方向へ戻る水
流を防止する整流板を設けることを特徴とする曝気装置
。(1) In an aeration device in which a stirring blade is attached to a hollow stirring shaft rotated by a motor and air is supplied to the wastewater through the stirring shaft above the water, the tip of the stirring blade protrudes from the opening of the stirring shaft. An aeration device characterized in that the stirring blade is provided with a rectifying plate that prevents water flow from returning from the outer circumferential portion of the hollow shaft toward the axial direction of the central portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63219916A JPH0268195A (en) | 1988-09-02 | 1988-09-02 | Aeration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63219916A JPH0268195A (en) | 1988-09-02 | 1988-09-02 | Aeration device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0268195A true JPH0268195A (en) | 1990-03-07 |
| JPH0546278B2 JPH0546278B2 (en) | 1993-07-13 |
Family
ID=16743032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63219916A Granted JPH0268195A (en) | 1988-09-02 | 1988-09-02 | Aeration device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0268195A (en) |
-
1988
- 1988-09-02 JP JP63219916A patent/JPH0268195A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0546278B2 (en) | 1993-07-13 |
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