JPH0451919Y2 - - Google Patents
Info
- Publication number
- JPH0451919Y2 JPH0451919Y2 JP1988011520U JP1152088U JPH0451919Y2 JP H0451919 Y2 JPH0451919 Y2 JP H0451919Y2 JP 1988011520 U JP1988011520 U JP 1988011520U JP 1152088 U JP1152088 U JP 1152088U JP H0451919 Y2 JPH0451919 Y2 JP H0451919Y2
- Authority
- JP
- Japan
- Prior art keywords
- air
- diffuser plate
- gasket
- air diffuser
- diffuser
- 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
Links
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000005273 aeration Methods 0.000 description 9
- 239000010865 sewage Substances 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 6
- 238000012856 packing Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000002351 wastewater Substances 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)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は下水処理場の曝気槽等において水中に
空気を散気するために用いられる散気装置の改良
に関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of an aeration device used to diffuse air into water in an aeration tank of a sewage treatment plant.
（従来の技術）
曝気槽用の散気装置としては従来から種々の構
造のものが知られており、例えば実公昭45−
20448号公報には扁平な函体の上面に多数の散気
板をパツキンを介して取付けた散気装置が示され
ている。また最近では散気板に圧縮空気を供給す
るための上記の函体に相当する部分の小型化が進
み、特に全面曝気を行う槽においては断面角形の
パイプの上面に散気板ホルダーを一定ピツチで取
付け、この散気板ホルダー上にパツキンを介して
散気板を直接設置する形式のものも広く用いられ
るに至つている。(Prior art) Various structures have been known as aeration devices for aeration tanks.
Japanese Patent No. 20448 discloses an air diffuser in which a large number of air diffuser plates are attached to the upper surface of a flat box via gaskets. In recent years, the part corresponding to the box for supplying compressed air to the air diffuser plate has become smaller, and especially in tanks that perform full-scale aeration, the air diffuser plate holder is mounted at a fixed pitch on the top of the pipe with a rectangular cross section. A type in which the air diffuser plate is mounted directly on the air diffuser plate holder via a gasket has also come to be widely used.
ところがこのような散気装置に用いられている
パツキンは散気板の周縁部を支持する額縁状のも
のであるため、散気板ホルダー側から加えられる
空気圧によつて押し広げられ散気板から外れてし
まう事故を生ずることがあつた。またこのような
散気装置においてはたとえば、実公昭59−33519
号公報や特開昭56−13087号公報に示されるよう
に、散気を停止した際に汚水が散気板を通して圧
縮空気供給配管の内部にまで浸入し、散気板の目
詰まりを早めるうえに、散気の再開時には配管中
の汚水の押し出しにかなりの時間とエネルギとを
浪費するという問題もあつた。 However, the packing used in such air diffusers is frame-shaped and supports the periphery of the air diffuser plate, so it is pushed open by the air pressure applied from the air diffuser plate holder, and the gasket is removed from the air diffuser plate. There have been some accidents where it has come off. In addition, in such a diffuser, for example,
As shown in Japanese Patent Publication No. 56-13087, when air diffusion is stopped, sewage penetrates into the compressed air supply piping through the air diffuser plate, causing the air diffuser plate to become clogged more quickly. Another problem was that when aeration was restarted, a considerable amount of time and energy was wasted pushing out the waste water from the pipes.
（考案が解決しようとする課題）
本考案は上記したような従来の問題点を解決し
て、パツキンが散気板から外れるおそれがないう
えに、散気停止中における散気装置内及び圧縮空
気供給配管中への汚水の浸入を防止することがで
きる散気装置を目的として完成されたものであ
る。(Problems to be solved by the invention) The present invention solves the conventional problems as described above, eliminates the risk of the gasket coming off the air diffuser plate, and prevents the compressed air from inside the air diffuser and the compressed air when the air diffuser is stopped. It was completed with the aim of creating an air diffuser that can prevent sewage from entering the supply pipes.
（課題を解決するための手段）
本考案は、散気板ホルダーの上面にパツキンを
介して散気板を取付けた散気装置であつて、この
パツキンは散気板の周縁部を支持する額縁部とこ
の額縁部の下面に額縁部と一体に形成された肉薄
の底板部とからなり、この底板部には散気板ホル
ダーのオリフイスと重ならないように偏心させた
位置に空気孔を形成したことを特徴とするもので
ある。(Means for Solving the Problems) The present invention is a diffuser in which a diffuser plate is attached to the upper surface of a diffuser plate holder via a gasket, and the gasket is a frame that supports the peripheral edge of the diffuser plate. and a thin bottom plate part formed integrally with the frame part on the lower surface of the picture frame part, and an air hole is formed in this bottom plate part at an eccentric position so as not to overlap with the orifice of the diffuser plate holder. It is characterized by this.
（実施例）
次に本考案を図示の実施例によつて更に詳細に
説明すると、１は圧縮空気供給路と散気装置の取
付ベースとの２つの役割を持つ角形のパイプ、２
はその上面に取付けられた散気板ホルダー、３は
この散気板ホルダー２の上面にパツキン４を介し
てボルト５により取付けられた多孔質の散気板で
ある。前述したように、従来の散気装置において
はパツキン４は散気板３の周縁部のみを支持する
額縁状のものであるが、本考案においてはパツキ
ン４は額縁部４ａのほかに額縁部４ａの下面に一
体に形成された例えば１〜３mm程度の肉薄の底板
部４ｂを備えている。なおパツキン４の材質とし
ては例えばクロロプレンゴムが用いられるが、そ
の他の耐食性の良いゴムを用いてもよい。また５
は散気板ホルダー２に形成されたオリフイス、６
はパツキン４の肉薄の底板部４ｂに形成された空
気孔であるが、本考案においては両者は重ならな
い位置までずらせて配置されている。必要な偏心
量は空気流量や空気圧力等によつて異なるが、水
深５〜6m程度の位置に設置される通常仕様の散
気装置の場合には５〜50mm程度より好ましくは10
〜30mm程度とすればよい。(Embodiment) Next, the present invention will be explained in more detail with reference to the illustrated embodiment. 1 is a rectangular pipe having two roles as a compressed air supply path and a mounting base for the air diffuser; 2
Reference numeral 3 designates a porous air diffuser plate attached to the upper surface of the air diffuser plate holder 2 with a gasket 4 and bolts 5. As mentioned above, in the conventional air diffuser, the gasket 4 has a frame shape that supports only the peripheral edge of the air diffuser plate 3, but in the present invention, the gasket 4 supports not only the frame portion 4a but also the frame portion 4a. It is provided with a thin bottom plate part 4b of, for example, about 1 to 3 mm, which is integrally formed on the lower surface of the board. Although chloroprene rubber is used as the material for the packing 4, for example, other rubbers with good corrosion resistance may be used. Also 5
is an orifice formed in the diffuser plate holder 2, 6
is an air hole formed in the thin bottom plate portion 4b of the gasket 4, but in the present invention, the two are arranged so as to be shifted to a position where they do not overlap. The required amount of eccentricity varies depending on the air flow rate, air pressure, etc., but in the case of a standard air diffuser installed at a depth of about 5 to 6 meters, it is preferably about 10 to 50 mm.
It should be about ~30mm.
なお、底板部４ｂは額縁部４ａへの外方への拡
りを防止すると共にオリフイス５を封止するもの
であればよいことから第３図、第４図に示すよう
に格子状、目形状が好ましいが他の形状でもよ
い。この場合には格子部や目形部でない部分が空
気孔６となる。格子部や目形部の幅はパツキン４
の形状や底板部４ｂの肉厚等により適宜設定する
ものである。 Note that the bottom plate portion 4b may be of a lattice shape or eye shape as shown in FIGS. 3 and 4, since it is sufficient that the bottom plate portion 4b prevents outward expansion to the frame portion 4a and seals the orifice 5. is preferred, but other shapes are also possible. In this case, the portions that are not the lattice portions or the eye-shaped portions become the air holes 6. The width of the lattice part and eye-shaped part is Patsukin 4
It is set as appropriate depending on the shape of the bottom plate portion 4b, the wall thickness of the bottom plate portion 4b, etc.
さらに、第５図のように散気板３の底に接する
程度にオリフイス５付近以外の底板部４ｂの高さ
を高くしておけば散気板３をより安定して支持す
ることもできると共に空気を均等に分散させるこ
とができ曝気効率が向上する。 Furthermore, if the height of the bottom plate part 4b other than the vicinity of the orifice 5 is made high enough to touch the bottom of the diffuser plate 3 as shown in FIG. 5, the diffuser plate 3 can be supported more stably. Air can be evenly distributed, improving aeration efficiency.
（作用）
このように構成されたものは、曝気槽内に設置
したうえパイプ１を通じて圧縮空気を供給すれ
ば、圧縮空気は散気板ホルダー２のオリフイス５
からパツキン４の肉薄の底板部４ｂの下面に入
り、この底板部４ｂを押上げつつ空気孔６からパ
ツキン４の上面に入り、更に散気板３を通じて多
数の微細な気泡として水中に散気される。このと
きパツキン４の額縁部４ａを外方へ押し広げよう
とする力が働くことは従来品と同様であるが、本
考案においては額縁部４ａは肉薄の底板部４ｂに
よつて一体に接続されているため外方への変位を
生じにくい。このため本考案においては高い空気
圧をかけてもパツキン４が散気板３の周縁部から
外れるおそれがない。(Function) If the device configured in this way is installed in the aeration tank and compressed air is supplied through the pipe 1, the compressed air will flow through the orifice 5 of the diffuser plate holder 2.
The air enters the bottom surface of the thin bottom plate 4b of the packing 4, and while pushing up the bottom plate 4b, enters the top surface of the packing 4 through the air hole 6, and is further diffused into the water as a large number of fine bubbles through the air diffuser plate 3. Ru. At this time, the force acting to push the frame part 4a of the gasket 4 outward is similar to the conventional product, but in the present invention, the frame part 4a is integrally connected by the thin bottom plate part 4b. Because of this, outward displacement is less likely to occur. Therefore, in the present invention, there is no risk that the gasket 4 will come off the peripheral edge of the air diffuser plate 3 even if high air pressure is applied.
また散気を停止した際には水圧によつて汚水が
散気板３の内部に浸入しようとするが、パツキン
４と散気板３との間の空間７内の圧力はパイプ１
内の圧力よりも高まるとパツキン４の肉薄の底板
部４ｂは散気板ホルダー２の上面に密着し、この
空間７内の空気がオリフイス５を通つて逃げるこ
とを防止する。このため本考案の散気装置を用い
た場合には散気停止中も空間７内の気圧を高く保
つことができ、汚水が散気板３を通じて散気装置
の内部に浸入することが確実に防止される。従つ
て汚水の逆流による散気板３の目詰まりが防止で
き、また散気再開時に逆流した汚水を配管中から
押出すために余分な時間とエネルギーとを費やす
必要がない。 Furthermore, when air diffusion is stopped, sewage tries to enter the inside of the air diffuser plate 3 due to water pressure, but the pressure in the space 7 between the gasket 4 and the air diffuser plate 3 is reduced by the pipe 1.
When the pressure becomes higher than the internal pressure, the thin bottom plate portion 4b of the gasket 4 comes into close contact with the upper surface of the air diffuser plate holder 2, and prevents the air in this space 7 from escaping through the orifice 5. Therefore, when the air diffuser of the present invention is used, the air pressure in the space 7 can be kept high even when air diffusion is stopped, and it is ensured that sewage does not infiltrate into the air diffuser through the air diffuser plate 3. Prevented. Therefore, it is possible to prevent clogging of the air diffuser plate 3 due to backflow of sewage water, and there is no need to spend extra time and energy to push backflowing sewage out of the piping when aeration is resumed.
（考案の効果）
本考案は以上の説明からも明らかなように、空
気圧によりパツキンが散気板から外れることを防
止することができるうえ、散気停止中における汚
水の浸入を防止することができるものであるか
ら、従来の問題点を一掃した散気装置として、実
用的価値は極めて大である。(Effects of the invention) As is clear from the above explanation, the present invention can prevent the gasket from coming off the air diffuser plate due to air pressure, and can also prevent the infiltration of sewage when air diffusion is stopped. Therefore, it has extremely great practical value as an air diffuser that eliminates the problems of conventional devices.
第１図は本考案の実施例を示す断面図、第２図
はその一部切欠平面図、第３図、第４図はパツキ
ンの変形例を示す平面図、第５図は他の実施例を
示す断面図である。
２……散気板ホルダー、３……散気板、４……
パツキン、４ａ……額縁部、４ｂ……底板部、５
……オリフイス。
Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a partially cutaway plan view thereof, Figs. 3 and 4 are plan views showing modified examples of the packing, and Fig. 5 is another embodiment. FIG. 2...Diffusion plate holder, 3...Diffusion plate, 4...
Packaging, 4a...frame part, 4b...bottom plate part, 5
...Orifice chair.
Claims (1)
散気板３を取付けた散気装置であつて、このパツ
キン４は散気板３の周縁部を支持する額縁部４ａ
とこの額縁部４ａの下面に額縁部４ａと一体に形
成された肉薄の底板部４ｂとからなり、この底板
部４ｂには散気板ホルダー２のオリフイス５と重
ならないように偏心させた位置に空気孔６を形成
したことを特徴とする散気装置。 This is a diffuser device in which a diffuser plate 3 is attached to the upper surface of a diffuser plate holder 2 via a gasket 4, and this gasket 4 has a frame portion 4a that supports the peripheral edge of the gas diffuser plate 3.
It consists of a thin bottom plate part 4b formed integrally with the frame part 4a on the lower surface of the frame part 4a, and a thin bottom plate part 4b is provided at an eccentric position so as not to overlap with the orifice 5 of the diffuser plate holder 2. An air diffuser characterized in that air holes 6 are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988011520U JPH0451919Y2 (en) | 1988-01-29 | 1988-01-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988011520U JPH0451919Y2 (en) | 1988-01-29 | 1988-01-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01122899U JPH01122899U (en) | 1989-08-21 |
| JPH0451919Y2 true JPH0451919Y2 (en) | 1992-12-07 |
Family
ID=31220148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988011520U Expired JPH0451919Y2 (en) | 1988-01-29 | 1988-01-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0451919Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5819798B2 (en) * | 1979-09-17 | 1983-04-20 | ベロイト コ−ポレ−ション | Transverse fiber orientation method in paper machine headbox |
| JPS6151999B2 (en) * | 1977-10-14 | 1986-11-11 | Ricoh Kk |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6014560Y2 (en) * | 1981-07-27 | 1985-05-09 | 恒夫 坪川 | Backflow prevention valve for air diffuser |
| JPS6151999U (en) * | 1984-09-06 | 1986-04-08 |
-
1988
- 1988-01-29 JP JP1988011520U patent/JPH0451919Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6151999B2 (en) * | 1977-10-14 | 1986-11-11 | Ricoh Kk | |
| JPS5819798B2 (en) * | 1979-09-17 | 1983-04-20 | ベロイト コ−ポレ−ション | Transverse fiber orientation method in paper machine headbox |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01122899U (en) | 1989-08-21 |
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