JPH0454878Y2 - - Google Patents
Info
- Publication number
- JPH0454878Y2 JPH0454878Y2 JP1989031225U JP3122589U JPH0454878Y2 JP H0454878 Y2 JPH0454878 Y2 JP H0454878Y2 JP 1989031225 U JP1989031225 U JP 1989031225U JP 3122589 U JP3122589 U JP 3122589U JP H0454878 Y2 JPH0454878 Y2 JP H0454878Y2
- Authority
- JP
- Japan
- Prior art keywords
- air
- diffuser plate
- float
- orifice
- 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
- 238000005273 aeration Methods 0.000 description 14
- 238000009792 diffusion process Methods 0.000 description 12
- 239000010865 sewage Substances 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000006260 foam Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel 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に散気量に応じたオリ
フイスを透設した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.
Publication No. 20448 discloses an air diffuser in which a large number of air diffusers are attached to the upper surface of a flat box via packing. Recently, the part corresponding to the above-mentioned box for supplying compressed air to the diffuser plate has become smaller, and especially in tanks that perform full-scale aeration, the diffuser plate holder is mounted at a fixed pitch on the top of the pipe with a rectangular cross section. A diffuser plate holder with a transparent orifice corresponding to the amount of air diffused has also become widely used.
ところがこのような散気装置の散気板ホルダー
に空けられているオリフイスの径は散気板の標準
散気量に合わせて製作されているため、新設され
た下水処理場の初期運転のように処理設備の下水
処理能力に比べて処理すべき下水量が少なく、必
要とする空気の量が散気板の標準散気量より著し
く少ない場合には、散気板全面から均一に発泡さ
せることは難しかつた。またこのような散気装置
においては、例えば実公昭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 diameter of the orifice in the diffuser plate holder of such an aeration device is manufactured to match the standard air diffusion amount of the diffuser plate, so it is difficult to use the same method as in the initial operation of a newly constructed sewage treatment plant. If the amount of sewage to be treated is small compared to the sewage treatment capacity of the treatment equipment and the amount of air required is significantly less than the standard air diffusion rate of the diffuser plate, it is not possible to uniformly foam from the entire surface of the diffuser plate. It was difficult. In addition, in such an aeration device, as shown in Japanese Utility Model Publication No. 59-33519 and Japanese Unexamined Patent Publication No. 56-13087, when the aeration is stopped, sewage flows through the aeration plate into the compressed air supply pipe. There was also the problem that the wastewater entered the interior of the pipes, causing the air diffuser plates to become clogged more quickly, and when air diffusion was restarted, a considerable amount of time and energy was wasted in pushing out the wastewater from the pipes.
また、例えば全面曝気を行う際に複数の散気装
置に対して一つの圧縮空気供給源から空気を供給
するとき、一つの散気板が割れて空気の通過抵抗
が急激に低下すると、その部分から集中的に空気
が噴出して他の散気装置からの曝気が行われず、
散気効率が激減してしまうという問題もあつた。 For example, when supplying air from one compressed air supply source to multiple air diffusers when performing whole-surface aeration, if one air diffuser plate cracks and the air passage resistance suddenly decreases, the problem may occur in that area. Air is ejected intensively from the air diffuser, preventing aeration from other air diffusers.
Another problem was that the air diffusion efficiency was drastically reduced.
（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、散気量が散気板の標準散気量より少ない場合
においても散気板全面から均一に発泡させること
ができるうえ、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、さらに一つの圧縮空気供給配管に接
続された複数の散気装置のうちの一つが破損した
際には、その散気装置への空気の供給を自動的に
停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, and allows foam to be formed uniformly from the entire surface of the diffuser plate even when the amount of air diffused is less than the standard amount of air diffused by the diffuser plate. In addition, it is possible to prevent sewage from entering the air diffuser and compressed air supply piping when air diffusion is stopped. It was completed with the aim of creating an air diffuser that can automatically stop the supply of air to that air diffuser if one of them is damaged.
（課題を解決するための手段）
上記の課題を解決するためになされた本考案
は、散気板ホルダーの上面にパツキンを介して散
気板差を取付けた散気装置であつて、この散気板
ホルダーに透設されたオリフイスに、オリフイス
の径よりも大きい径を有するフランジを上下に備
えた逆円錐状のフロートを挿入したことを特徴と
するものである。(Means for Solving the Problems) The present invention, which has been devised to solve the above problems, is a diffuser in which a diffuser plate is attached to the upper surface of a diffuser plate holder via a gasket. This device is characterized by inserting an inverted conical float with flanges on the top and bottom having a diameter larger than the diameter of the orifice into an orifice provided through the air plate holder.
（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７により取付けられた多孔質の散気板で
あり、角形のパイプ１と散気板ホルダー２の接合
面にはオリフイス５が透設されている。(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
3 is a porous air diffuser plate that is attached to the upper surface of the air diffuser plate holder 2 with bolts 7 through gaskets 4. An orifice 5 is transparently provided on the joint surface of the plate holder 2.
本考案においては、このオリフイス５に上端及
び下端にオリフイス５の径よりもやや大きい径の
フランジ６ａ，６ｂを取り付けた逆円錐状のフロ
ート６が挿入されている。このフロート６は圧縮
空気圧により上下してオリフイス５を流れる空気
量を調節するためのものであるが、フロート６の
上端に取り付けたフランジ６ａは散気を停止した
際に汚水の浸入を防止するためのものであり、フ
ロート６の下端に取り付けたフランジ６ｂは散気
板が割れて空気の通過抵抗が激減した際に空気を
遮断するためのものである。フロート６およびオ
リフイス５の寸法は散気板３の散気量によつて決
められるものであるが、例えば30×30cmの散気板
の場合、オリフイス５の径を12mmとすると、逆円
錐状のフロート６の上端側の外径は10〜11cm程度
とするのが好ましい。また、下端側の外径は散気
板３の散気量の最大値から、長さおよびテーパ角
度は逆円錐状のフロート６の上端から散気板３ま
での距離と逆円錐状のフロート６の下端から角形
のパイプ１までの距離とから決定する。逆円錐状
のフロート６の材質は、例えばステンレススチー
ルのような耐錆性の金属、塩化ビニルのような樹
脂、シリコンゴム等を使用することができ、フロ
ート６の比重を調節するためにこれらを組み合わ
せて使用することもできる。 In the present invention, an inverted conical float 6 is inserted into the orifice 5, and flanges 6a and 6b having a diameter slightly larger than that of the orifice 5 are attached to the upper and lower ends thereof. This float 6 is used to adjust the amount of air flowing through the orifice 5 by moving up and down using compressed air pressure, but the flange 6a attached to the upper end of the float 6 is used to prevent sewage from entering when aeration is stopped. The flange 6b attached to the lower end of the float 6 is for blocking air when the air diffuser plate is broken and the air passage resistance is drastically reduced. The dimensions of the float 6 and orifice 5 are determined by the amount of air diffused by the diffuser plate 3. For example, in the case of a 30 x 30 cm diffuser plate and the diameter of the orifice 5 is 12 mm, the dimensions of the float 6 and orifice 5 are determined by the amount of air diffused by the diffuser plate 3. The outer diameter of the upper end of the float 6 is preferably about 10 to 11 cm. In addition, the outer diameter of the lower end side is determined from the maximum value of the air diffusion amount of the air diffuser plate 3, and the length and taper angle are the distance from the upper end of the inverted conical float 6 to the air diffuser plate 3, and the length and taper angle of the inverted conical float 6. It is determined from the distance from the lower end of the pipe 1 to the rectangular pipe 1. The material of the inverted conical float 6 can be, for example, a rust-resistant metal such as stainless steel, a resin such as vinyl chloride, silicone rubber, etc. These materials can be used to adjust the specific gravity of the float 6. They can also be used in combination.
上下両端のフランジ６ａ，６ｂはオリフイス５
からフロート６が外れないようにする役割も持つ
が、前記したように上端のフランジ６ａは散気停
止時に下面が散気板ホルダー２の上面に密着して
散気装置内および圧縮空気供給配管中への汚水の
流入を防止するためのものであり、下端のフラン
ジ６ｂは散気板が割れて空気の通過抵抗が激減し
た際に空気を遮断するためのものである。パイプ
１および散気板ホルダー２の厚みが薄いために必
要断面積効果が得られない場合には、第３図のよ
うにパイプ１の裏面又は散気板ホルダー２の上面
に肉盛りをすることもできる。またフロート６の
バランスが悪いときは第４図のようにガイド９を
設けることもできる。 Flanges 6a and 6b at both upper and lower ends are orifices 5
The flange 6a at the upper end also has the role of preventing the float 6 from coming off from the air diffuser, but as mentioned above, when air diffusion is stopped, the lower surface of the flange 6a is in close contact with the upper surface of the air diffuser plate holder 2, so that it does not come off inside the air diffuser or inside the compressed air supply piping. The flange 6b at the lower end is used to block air when the air diffuser plate is broken and the air passage resistance is drastically reduced. If the necessary cross-sectional area effect cannot be obtained because the pipe 1 and the diffuser plate holder 2 are too thin, build up the back surface of the pipe 1 or the top surface of the diffuser plate holder 2 as shown in Figure 3. You can also do it. Further, if the float 6 is out of balance, a guide 9 can be provided as shown in FIG.
（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
の内部に挿入された逆円錐状のフロート６を押し
上げてオリフイス５とフロート６との空間を通
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。このとき散気板３から散気
される圧縮空気の散気量が多いと逆円錐状のフロ
ート６が高く浮き、散気量が少ないとフロート６
が低い位置で静止して常にオリフイス５とフロー
ト６との空間の断面積が適正に保たれるため、圧
縮空気の散気圧力と散気量のバランスが調節さ
れ、低い散気量でも微細気泡が散気板３の前面か
ら水中に散気されることとなる。(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 inverted conical float 6 inserted into the inside of the float is pushed up, passes through the space between the orifice 5 and the float 6, and is further diffused into the water as a large number of fine bubbles through the air diffuser plate 3. At this time, if the amount of compressed air diffused from the diffuser plate 3 is large, the inverted conical float 6 will float high, and if the amount of air diffused is small, the float 6 will float high.
is stationary at a low position and the cross-sectional area of the space between the orifice 5 and the float 6 is always maintained at an appropriate level, so the balance between the diffused pressure and the amount of air diffused is adjusted, and even at a low amount of air diffused, fine bubbles are generated. is diffused into the water from the front of the diffuser plate 3.
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１０内の圧力がパイプ
１内の圧力よりも高まると逆円錐状のフロート６
の上端のフランジ６ａの下面は散気板ホルダー２
の上面に密着し、この空間１０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１０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く、供給空気
のロスがない。 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 inside the space 10 between the gasket 4 and the air diffuser plate 3 is equal to the pressure inside the pipe 1. When the height is higher than that, the inverted conical float 6
The lower surface of the upper end flange 6a is the air diffuser plate holder 2.
The air in this space 10 is prevented from escaping through the orifice 5. Therefore, when using the air diffuser of the present invention, the air pressure in the space 10 can be kept high even when air diffusion is stopped, and it is ensured that sewage does not enter the inside of 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 the 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 restarted, and loss of supply air is reduced. do not have.
また複数の散気装置に一つの圧縮空気供給源か
ら空気を供給されているとき、一つの散気板が割
れて空気の通過抵抗が急激に低下したような場合
には、逆円錐状のフロート６の下端のフランジ６
ｂの上面がパイプ１の下面に密着し、この部分か
ら集中的に空気が噴出することを防止することが
できる。 In addition, when air is supplied to multiple air diffusers from one compressed air supply source, if one air diffuser plate breaks and the air passage resistance suddenly decreases, use an inverted conical float. Flange 6 at the lower end of 6
The upper surface of b comes into close contact with the lower surface of the pipe 1, and it is possible to prevent air from blowing out intensively from this portion.
（考案の効果）
本考案は以上の説明から明らかなように、散気
板の標準散気量よりも少ない空気を散気するとき
にも逆円錐状のフロートにより流量調節されるの
で散気板の全面から均一に発泡させることができ
るうえ、オリフイス径より大きいフランジにより
散気停止中における汚水の浸入と、散気板が割れ
た場合の空気の流出とをともに防止することがで
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。(Effect of the invention) As is clear from the above explanation, the present invention allows the flow rate to be adjusted by the inverted conical float even when diffusing less air than the standard amount of air diffused by the diffuser plate. In addition to being able to foam uniformly from the entire surface of the air diffuser, the flange, which is larger than the orifice diameter, can prevent both the infiltration of sewage when air diffusion is stopped and the outflow of air if the air diffuser plate breaks. Therefore, it has extremely great practical value as an air diffuser that eliminates the problems of conventional methods.
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、５……オリフイス、６……フロート。
FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a partially cutaway plan view thereof, and FIGS. 3 and 4 are sectional views showing other embodiments. 2...Diffusion plate holder, 3...Diffusion plate, 4...
Patchkin, 5...orifice, 6...float.
Claims (1)
散気板３を取付けた散気装置であつて、この散気
板ホルダー２に透設されたオリフイス５に、オリ
フイス５の径よりも大きい径を有するフランジ６
ａ，６ｂを上下に備えた逆円錐状のフロート６を
挿入したことを特徴とする散気装置。 This is a diffuser in which a diffuser plate 3 is attached to the upper surface of a diffuser plate holder 2 via a gasket 4, and an orifice 5 provided through the diffuser plate holder 2 has a diameter larger than that of the orifice 5. flange 6 with
An air diffuser characterized by inserting an inverted conical float 6 having upper and lower portions a and 6b.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989031225U JPH0454878Y2 (en) | 1989-03-17 | 1989-03-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989031225U JPH0454878Y2 (en) | 1989-03-17 | 1989-03-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02121194U JPH02121194U (en) | 1990-10-01 |
| JPH0454878Y2 true JPH0454878Y2 (en) | 1992-12-22 |
Family
ID=31256933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989031225U Expired JPH0454878Y2 (en) | 1989-03-17 | 1989-03-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0454878Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4132771B2 (en) * | 2001-10-12 | 2008-08-13 | 株式会社神鋼環境ソリューション | Biological reaction tank and stirring method thereof |
| JP3986001B2 (en) * | 2002-03-14 | 2007-10-03 | 日本碍子株式会社 | Renewable diffuser |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5066618A (en) * | 1973-10-19 | 1975-06-05 | ||
| JPS6151999B2 (en) * | 1977-10-14 | 1986-11-11 | Ricoh Kk | |
| JPS6393625A (en) * | 1986-10-08 | 1988-04-23 | Daihatsu Motor Co Ltd | Fuel flow-out preventing device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6151999U (en) * | 1984-09-06 | 1986-04-08 | ||
| JPS61112074U (en) * | 1984-12-21 | 1986-07-15 |
-
1989
- 1989-03-17 JP JP1989031225U patent/JPH0454878Y2/ja not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5066618A (en) * | 1973-10-19 | 1975-06-05 | ||
| JPS6151999B2 (en) * | 1977-10-14 | 1986-11-11 | Ricoh Kk | |
| JPS6393625A (en) * | 1986-10-08 | 1988-04-23 | Daihatsu Motor Co Ltd | Fuel flow-out preventing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02121194U (en) | 1990-10-01 |
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