JPH0520401Y2 - - Google Patents
Info
- Publication number
- JPH0520401Y2 JPH0520401Y2 JP7545688U JP7545688U JPH0520401Y2 JP H0520401 Y2 JPH0520401 Y2 JP H0520401Y2 JP 7545688 U JP7545688 U JP 7545688U JP 7545688 U JP7545688 U JP 7545688U JP H0520401 Y2 JPH0520401 Y2 JP H0520401Y2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- sludge
- thickening
- sedimentation tank
- sedimentation
- 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 - Lifetime
Links
- 239000010802 sludge Substances 0.000 claims description 47
- 238000004062 sedimentation Methods 0.000 claims description 30
- 230000008719 thickening Effects 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 7
- 238000007790 scraping Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000010865 sewage Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、沈澱池とそこで分離された固形物を
更に濃縮するための濃縮槽とを一体とした濃縮沈
澱池に関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a concentration sedimentation tank that integrates a sedimentation tank and a concentration tank for further concentrating the solids separated therein.
（従来の技術）
活性汚泥法による汚水処理においては、反応槽
よりの処理汚水を沈澱池に流入して固液分離を行
ない、汚泥の一部を反応槽への返送汚泥とし、余
剰汚泥はさらに濃縮槽に流入し、濃縮汚泥として
排出することが行なわれている。一般的には、第
２図に示すように円形の沈澱池２０に処理汚水ｂ
を流入し、沈降した汚泥を掻寄機２１によつて沈
澱池の低部中央に設けたピツト２２に掻き落し、
その一部をポンプによつて処理槽（図示を略す）
に返送し、余剰の汚泥はポンプによつて別途設置
された濃縮槽２３へ流入させ、そこでさらに汚泥
を沈降濃縮させて排出するようにしている。(Prior art) In sewage treatment using the activated sludge method, treated sewage from a reaction tank flows into a sedimentation tank where solid-liquid separation is performed, a portion of the sludge is returned to the reaction tank, and excess sludge is further It flows into a thickening tank and is discharged as thickened sludge. Generally, as shown in Figure 2, treated wastewater b is placed in a circular sedimentation tank 20.
The sedimented sludge is scraped off by a scraper 21 into a pit 22 provided at the center of the lower part of the settling tank,
A part of it is processed by a pump (not shown).
The excess sludge is sent to the tank 23, which is installed separately, using a pump, where the sludge is further sedimented and concentrated before being discharged.
（考案が解決しようとする課題）
このように、活性汚泥法においての汚泥の処理
では、沈澱池と濃縮槽とを格別に配置しているた
め、広い設置場所を必要とするばかりでなく、動
力装置や配管系統も複数を要し、全体として高価
な設備になる、という問題があつた。(Problem to be solved by the invention) As described above, in the treatment of sludge using the activated sludge method, the sedimentation tank and thickening tank are specially arranged, which not only requires a large installation space but also requires a large amount of power. There was a problem that multiple devices and piping systems were required, resulting in an expensive equipment as a whole.
本考案は、このような汚泥処理における問題の
改善を図るためにされたもので、沈澱池と濃縮槽
とを一体構成のものとし、駆動装置や配管の単一
化を図り、設置場所が小さく、設備費が安価とな
る濃縮沈澱池を提供しようとするものである。 This invention was developed in order to improve these problems in sludge treatment.The sedimentation tank and thickening tank are integrated into one unit, and the driving device and piping are unified, so that the installation space is small. The aim is to provide a concentration sedimentation tank with low equipment costs.
（課題を解決するための手段）
次に、本考案の構成について、実施例に対応す
る第１図を参照して説明すると、本考案は、底面
２を中心部に向けて低くなるように傾斜して形成
した沈澱槽１の下端に、該沈澱槽１より小径に形
成し、上端を開放した濃縮槽５を、上下に開通３
して連設し、沈澱槽１と濃縮槽５とを上下に通貫
して立設した回転軸７に、沈澱槽１内に位置して
汚泥掻寄装置１０を固定すると共に、濃縮槽５内
に位置して攪拌装置１２を固定し、また、濃縮槽
５の上端部内には、汚泥返送管１３の取入端を上
方に開口して設けると共に、濃縮槽５の下低部に
は余剰汚泥排出管１５を接続したことを特徴とす
るものである。(Means for Solving the Problems) Next, the configuration of the present invention will be explained with reference to FIG. 1 corresponding to the embodiment. At the lower end of the sedimentation tank 1 formed in this way, a concentration tank 5 is formed with a diameter smaller than that of the sedimentation tank 1 and has an open upper end.
The sludge scraping device 10 is located in the sedimentation tank 1 and is fixed to the rotating shaft 7 which is installed in series and extends vertically through the sedimentation tank 1 and the thickening tank 5. In addition, the intake end of the sludge return pipe 13 is provided in the upper end of the thickening tank 5 with an upward opening, and the lower part of the thickening tank 5 has a surplus. It is characterized in that a sludge discharge pipe 15 is connected.
（作用）
上記構成の装置において、原汚水は供給管１９
より沈澱槽１の上部に流入し、汚泥の沈降分離が
なされる。槽底に沈降した汚泥は汚泥掻寄装置１
０により開口３より濃縮槽５に送り込まれ、汚泥
の分離された水は排水管１８より取り出される。
開口３より濃縮槽５に入る汚泥は、その一部が返
送汚泥管１３に吸引されて、図示を略した反応槽
へ返送され、残余の汚泥は濃縮槽５中を固形化を
進めながら沈降し、槽底に沈積することになる。
その沈積した汚泥は、余剰汚泥排出管１５により
槽外に排出されることになるのである。(Function) In the device with the above configuration, raw sewage is supplied to the supply pipe 19.
The sludge flows into the upper part of the settling tank 1, where the sludge is settled and separated. Sludge that has settled to the bottom of the tank is removed by sludge scraping device 1.
The water from which the sludge has been separated is taken out from the drain pipe 18.
A part of the sludge entering the thickening tank 5 through the opening 3 is sucked into the return sludge pipe 13 and returned to the reaction tank (not shown), and the remaining sludge settles in the thickening tank 5 while solidifying. , will be deposited on the bottom of the tank.
The deposited sludge is discharged to the outside of the tank through the excess sludge discharge pipe 15.
（実施例）
以下、本考案の実施例について、第１図を参照
して説明する。(Example) Hereinafter, an example of the present invention will be described with reference to FIG.
図において１は沈澱槽で、円筒状に形成され、
その底部２は中心部に向けて底くなるように漏斗
状に形成されており、下端の中心部には所要径の
開口３が形成されている。５は濃縮槽で、沈澱槽
１より小径の円筒状に形成され、下端には底板４
を有し、上端は開放されており、この開放された
上端を沈澱槽１の下端開口３に沿つて接続して、
沈澱槽１と濃縮槽５とは上下に連設され、それら
両槽１，５は開口３により上下に開通されてい
る。 In the figure, 1 is a settling tank, which is formed into a cylindrical shape.
The bottom part 2 is formed in a funnel shape so as to bottom toward the center, and an opening 3 of a required diameter is formed in the center of the lower end. 5 is a concentration tank, which is formed into a cylindrical shape with a smaller diameter than the sedimentation tank 1, and has a bottom plate 4 at its lower end.
The upper end is open, and the open upper end is connected along the lower end opening 3 of the settling tank 1,
The sedimentation tank 1 and the concentration tank 5 are arranged vertically, and both the tanks 1 and 5 are opened vertically by an opening 3.
前記両槽１，５の中心部には、濃縮槽５の底板
４に設けた軸受６に支持させて、回転軸７が両槽
１，５を上下に通貫して立設され、沈澱槽１上に
設けたモータ８により回転されるようになつてい
る。そして、回転軸７の沈澱槽１内にある個所に
は、底部２に摺接するスクレーパ９，９を設けた
汚泥掻寄装置１０が取付けられ、また、回転軸７
の濃縮槽５内にある個所には、多数の棒体１１，
１１を間隔をおいて立設した攪拌装置１２が取付
けられている。 At the center of both tanks 1 and 5, a rotating shaft 7 is vertically installed through both tanks 1 and 5, supported by a bearing 6 provided on the bottom plate 4 of the concentration tank 5, and the sedimentation tank It is designed to be rotated by a motor 8 provided on 1. A sludge scraping device 10 having scrapers 9, 9 in sliding contact with the bottom portion 2 is attached to a portion of the rotating shaft 7 in the sedimentation tank 1, and
A large number of rods 11,
A stirring device 12 is attached with stirring devices 11 erected at intervals.
そして、濃縮槽５の上端部内には、汚泥返送管
１３の取入端部が挿入されて上方に開口され、そ
の端部に汚泥取入れ用の上方に拡開された受皿１
４，１４が設けられている。また、濃縮槽５の底
部には余剰汚泥排出管１５が接続されている。 The intake end of the sludge return pipe 13 is inserted into the upper end of the thickening tank 5 and opened upward, and a receiving tray 1 that is expanded upward for sludge intake is provided at the end of the intake end of the sludge return pipe 13.
4 and 14 are provided. Further, an excess sludge discharge pipe 15 is connected to the bottom of the thickening tank 5.
なお、沈澱槽１の上部には、従来の沈澱槽にお
けると同様に、回転軸を囲むセンターウエル１６
及び越流トラフ１７、排水管１８、原水供給管１
９が設けられている。 In addition, in the upper part of the sedimentation tank 1, there is a center well 16 surrounding the rotating shaft, as in the conventional sedimentation tank.
and overflow trough 17, drainage pipe 18, raw water supply pipe 1
9 is provided.
前記構成の濃縮沈澱池による汚水処理について
説明すると、原汚水は供給管１９よりセンターウ
エル１６内に流入して拡散し、比重の大きな汚泥
は水と分離して沈澱槽１の下部に沈降し、水は越
流トラフ１７を越えて浄水として排水管１８より
槽外に取出される。そして、底部２上に沈降した
汚泥は、回転軸７の回転により底部２上を摺接す
るスクレーパ９によつて下端開口３に掻き落さ
れ、その開口３より濃縮槽５内に流入することに
なる。その際その流入する汚泥の一部は、受皿１
４，１４に捕捉され、汚泥ポンプＰにより汚泥返
送管１３に流入して反応槽（図示を略す）に返送
汚泥として送られることになる。 To explain the sewage treatment using the thickening sedimentation tank configured as described above, raw sewage flows into the center well 16 from the supply pipe 19 and diffuses, sludge with a large specific gravity is separated from water and settles at the bottom of the sedimentation tank 1, The water passes over the overflow trough 17 and is taken out of the tank through a drain pipe 18 as purified water. The sludge that has settled on the bottom 2 is scraped off to the lower end opening 3 by the scraper 9 that slides on the bottom 2 due to the rotation of the rotating shaft 7, and flows into the thickening tank 5 through the opening 3. . At that time, some of the sludge flowing into the tray 1
4 and 14, flows into the sludge return pipe 13 by the sludge pump P, and is sent to the reaction tank (not shown) as return sludge.
濃縮槽５に流入した汚泥は、攪拌装置１２によ
る緩い攪拌作用で沈降しながら水との分離が促進
されつつ粗大化して濃縮槽５の下底に沈積するこ
ととなり、そこから汚泥ポンプＰにより余剰汚泥
排出管に流入し、槽外に排出されることになるの
である。 The sludge that has flowed into the thickening tank 5 settles due to the gentle stirring action of the stirring device 12 while promoting separation from water, becoming coarse and deposited at the bottom of the thickening tank 5, from which the sludge pump P removes the surplus. The sludge flows into the sludge discharge pipe and is discharged outside the tank.
（考案の効果）
以上説明したように、本考案の濃縮沈澱池は、
底面を中心部に向けて低くなるように傾斜して形
成した沈澱槽の下端に、該沈澱槽より小径に形成
し、上端を開放した濃縮槽を、上下に開通して連
設し、沈澱槽と濃縮槽とが上下に通貫して立設し
た回転軸に、沈澱槽内に位置して汚泥掻寄装置を
固定すると共に、濃縮槽内に位置して攪拌装置を
固定し、また、濃縮槽の上端部内には、汚泥返送
管の取入端を上方に開口して設けると共に、濃縮
槽の下低部には余剰汚泥排出管を接続した構成と
しており、沈澱槽と濃縮槽とを上下に一体化して
単一槽のものとして形成したので、設置場所が小
さくてすむと共に、駆動装置も単一化でき、設備
費が大巾に節減でき、また、返送汚泥の引抜きと
濃縮余剰汚泥の引き抜きが合理的に区分して行え
ることになる等、多くの利点を有するものであ
る。(Effects of the invention) As explained above, the concentration sedimentation tank of the invention has the following effects:
At the lower end of the sedimentation tank, which is formed so that the bottom surface is inclined toward the center, a concentrating tank, which is formed with a smaller diameter than the sedimentation tank and has an open upper end, is opened vertically and connected to the sedimentation tank. A sludge scraping device located inside the sedimentation tank is fixed to a rotating shaft vertically extending through the thickening tank, and a stirring device located inside the thickening tank is fixed to the rotating shaft. The intake end of the sludge return pipe is opened upward in the upper end of the tank, and the excess sludge discharge pipe is connected to the lower part of the thickening tank. Since it is integrated into a single tank, the installation space is small, and the driving device can be unified, resulting in a significant reduction in equipment costs. This has many advantages, such as being able to perform extraction in rational sections.
第１図は本考案濃縮沈澱池の一実施例を示す側
断面図、第２図は従来の沈澱、濃縮処理の概要を
示す説明図である。
１……沈澱槽、２……底部、３……開口、５…
…濃縮槽、７……回転軸、１０……汚泥掻寄装
置、１２……攪拌装置、１３……汚泥返送管、１
５……余剰汚泥排出管、１８……排水管。
FIG. 1 is a side sectional view showing an embodiment of the concentration sedimentation tank of the present invention, and FIG. 2 is an explanatory diagram showing an overview of conventional sedimentation and concentration processing. 1... Sedimentation tank, 2... Bottom, 3... Opening, 5...
... Thickening tank, 7 ... Rotating shaft, 10 ... Sludge scraping device, 12 ... Stirring device, 13 ... Sludge return pipe, 1
5... Surplus sludge discharge pipe, 18... Drain pipe.
Claims (1)
形成した沈澱槽の下端に、該沈澱槽より小径に形
成し、上端を開放した濃縮槽を、上下に開通して
連設し、沈澱槽と濃縮槽とを上下に通貫して立設
した回転軸に、沈澱槽内に位置して汚泥掻寄装置
を固定すると共に、濃縮槽内に位置して攪拌装置
を固定し、また、濃縮槽の上端部内には、汚泥返
送管の取入端を上方に開口して設けると共に、濃
縮槽の下低部には余剰汚泥排出管を接続したこと
を特徴とする、濃縮沈澱池。 At the lower end of the sedimentation tank, which is formed so that the bottom surface is inclined toward the center, a concentrating tank, which is formed with a smaller diameter than the sedimentation tank and has an open upper end, is opened vertically and connected to the sedimentation tank. A sludge scraping device located inside the settling tank is fixed to a rotating shaft vertically passing through the thickening tank, and a stirring device is fixed inside the thickening tank. 1. A thickening and settling tank, characterized in that an intake end of a sludge return pipe is provided in the upper end of the tank with an upward opening, and an excess sludge discharge pipe is connected to the lower part of the thickening tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7545688U JPH0520401Y2 (en) | 1988-06-07 | 1988-06-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7545688U JPH0520401Y2 (en) | 1988-06-07 | 1988-06-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01179708U JPH01179708U (en) | 1989-12-25 |
| JPH0520401Y2 true JPH0520401Y2 (en) | 1993-05-27 |
Family
ID=31300524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7545688U Expired - Lifetime JPH0520401Y2 (en) | 1988-06-07 | 1988-06-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0520401Y2 (en) |
-
1988
- 1988-06-07 JP JP7545688U patent/JPH0520401Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01179708U (en) | 1989-12-25 |
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