JPH0263505A - Sludge concentration tank - Google Patents
Sludge concentration tankInfo
- Publication number
- JPH0263505A JPH0263505A JP63212421A JP21242188A JPH0263505A JP H0263505 A JPH0263505 A JP H0263505A JP 63212421 A JP63212421 A JP 63212421A JP 21242188 A JP21242188 A JP 21242188A JP H0263505 A JPH0263505 A JP H0263505A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- filter bed
- concentration
- dehydration
- tank
- 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.)
- Pending
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 55
- 238000001914 filtration Methods 0.000 claims abstract description 12
- 230000018044 dehydration Effects 0.000 claims abstract description 9
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 230000008719 thickening Effects 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 10
- 238000007790 scraping Methods 0.000 claims description 8
- 230000003993 interaction Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims 1
- 230000001737 promoting effect Effects 0.000 claims 1
- 238000013019 agitation Methods 0.000 abstract description 2
- 238000007796 conventional method Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000006228 supernatant Substances 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野Ｊ
この発明は水処理過程で発生するスラッジを受は入れ、
自然沈殿により上澄水とスラッジとを分離すると杖に、
下層圧密域においてスラッジの濃度を高めつつ貯留する
ためのスラッジ濃縮槽に関するものである。[Detailed Description of the Invention] [Industrial Application Field J] This invention receives sludge generated in the water treatment process,
When supernatant water and sludge are separated by natural sedimentation, the cane becomes
This invention relates to a sludge thickening tank for storing sludge while increasing its concentration in a lower consolidation area.
［従来の技術」
従来、排水池、排泥池又は沈ｈＩｌ！池等から排出され
るスラッジを受けて、自然沈殿によるスラッジの濃縮を
行なう濃縮槽は堤案されている。[Prior art] Conventionally, a drainage pond, a sludge pond or a silt! Banks have been proposed for thickening tanks that receive sludge discharged from ponds, etc., and thicken the sludge through natural sedimentation.
そもそも濃縮スラッジ濃度は、そのスラッジ性状により
決定されるものであるが、性状は取水河川毎に異なり、
更に季節によっても異なるため、設計時に正確な把握が
行なえず、濃縮槽容量の決定に当たっては、安全側に立
った判断から、やや過大なものとされる場合がある。ま
た容量的には満足されても、スラツジ濃度が一定とはで
きないことから、濃縮槽の次工程である機械・天日等に
よるスラッジ脱水設備の処理効率を低下させる原因とな
っている。In the first place, the concentration of concentrated sludge is determined by the properties of the sludge, which vary depending on the intake river.
Furthermore, since it varies depending on the season, it is difficult to accurately grasp it at the time of design, and when determining the concentration tank capacity, it may be decided to be slightly excessive from a safety standpoint. Furthermore, even if the capacity is satisfied, the sludge concentration cannot be kept constant, which causes a reduction in the processing efficiency of sludge dewatering equipment using machines, solar, etc., which is the next step after the thickening tank.
［ｆｉｌＭを解決するための手段］
ここにおいてこの発明はスラッジ濃縮槽底部にＳ炉床を
有し、この炉床の直上に汚泥の攪拌、混合を行なう掻寄
装置を設け、Ｓ炉床のろ過脱水作用と、Ｓ炉床直上の脱
水による濃厚汚泥の攪拌、混合作用との相互作用の繰り
返えしによって、ろ過脱水を促進し、スラッジ濃度を調
整することを特徴とするスラッジ濃縮槽を提案するもの
である。[Means for solving filM] Here, the present invention has an S hearth at the bottom of the sludge thickening tank, and a scraping device for stirring and mixing the sludge is provided directly above the hearth, and the filtration of the S hearth We propose a sludge thickening tank that promotes filtration and dewatering and adjusts sludge concentration through repeated interaction between dewatering action and stirring and mixing action of thick sludge due to dewatering directly above the S hearth. It is something to do.
すなわちこの発明のスラッジ濃縮槽においては、濃縮槽
底部のＳ戸床と、Ｓ炉床直上を回転し、炉床上に形成さ
れる不透水性のスラッジ濃縮ゾーンを、剥離すると共に
、機械的に攪拌、混合並びに槽中央への掻寄せを行なう
もので、Ｓ戸床による）濾過脱水作用により、所望のス
ラッジ濃度に調整可能とするものである。That is, in the sludge thickening tank of the present invention, the S door at the bottom of the thickening tank and the S hearth rotate directly above the S hearth to peel off and mechanically stir the impermeable sludge concentration zone formed on the hearth. , mixing and raking to the center of the tank, and the sludge concentration can be adjusted to the desired concentration by filtering and dehydrating the sludge (through the S door).
１炉床は砂ｉ戸床のとき、掻寄装置による砂の目減り分
を、例えは年に１回補充するようにする、砂ｊ戸床やセ
ラミツ９８炉床等の多孔質Ｓ炉床の目づまりに対し、て
、Ｓ炉床の底部から上方に向ケて、エアパージによる空
気洗浄や、ｉ！！流洗浄によって、；炉床の目づまりに
対する再生を行なうことができる。1. When the hearth is a sand i-todoko, the amount of sand lost by the raking device should be replenished, for example, once a year. To prevent blockages, clean the air with air purge from the bottom of the S hearth upwards, or clean the air with i! ! By flushing, it is possible to regenerate clogging of the hearth.
［実施例〕
第１図において、槽底版部にＳ炉床１及びシ戸水出ロ弁
２を有する濃縮槽３に、Ｓ炉床１の直上を回転する撹拌
掻寄装置４を槽上に設ける架台５により吊下する設備で
、流入するスラッジは自然性でんにより、上澄水とスラ
ッジとに分離され、上澄水は上部の流出口６から集水・
排出され、沈降スラッジは下槽で自然濃縮される。[Example] In FIG. 1, a concentration tank 3 having an S hearth 1 and a water outlet valve 2 on the tank bottom plate is provided with an agitation scraping device 4 that rotates directly above the S hearth 1 on the tank. The equipment is suspended by a frame 5, and the inflowing sludge is separated into supernatant water and sludge by natural sludge, and the supernatant water is collected and collected from the upper outlet 6.
The sludge is discharged and the settled sludge is naturally concentrated in the lower tank.
ここで１戸水出口弁２を開放することにより。1 by opening the water outlet valve 2 here.
Ｓ炉床部によるろ過脱水が行なわれ、スラッジ濃度は自
然濃縮濃度より四に高められる。Filtration and dehydration is performed by the S hearth section, and the sludge concentration is increased to 4 times higher than the natural concentration concentration.
しかしろ過脱水を継続すると、Ｓ炉床表面に不透水性の
スラッジ濃縮ゾーンが形成され。However, if filtration and dewatering were continued, an impermeable sludge concentration zone would be formed on the S hearth surface.
ろ過脱水効率は著しく低下し、脱水効果は期待できない
状態となる。The filtration and dehydration efficiency is significantly reduced, and the dehydration effect cannot be expected.
この発明ではろ床１直上を回転する攪拌隆寄装Ｍ４のブ
レード７により、不透水性スラッジ濃縮ゾーンは削りさ
られ、ろ過脱水機能を回復持続されると共に、濃縮スラ
ッジの攪拌混合・掻寄作用により、槽下層全体のスラッ
ジ濃度を高めて行くものである。In this invention, the impermeable sludge concentration zone is scraped by the blade 7 of the stirring ridge M4 rotating directly above the filter bed 1, and the filtration and dewatering function is restored and maintained, and the stirring, mixing and scraping effect of the concentrated sludge is This increases the sludge concentration in the entire lower layer of the tank.
この繰り返えしによりスラッジ濃度は徐々に高められ、
ろ過限界濃度とも云える濃度にまで達することができる
が、濃縮スラッジは次工程への移送のため、十分な流動
性を保つ必要があるから、所定濃度に達した時点で、炉
水出口弁２を閉じ、所定濃度を保ちつつ貯留を行なう。By repeating this process, the sludge concentration gradually increases,
It is possible to reach a concentration that can be called the filtration limit concentration, but since the concentrated sludge needs to maintain sufficient fluidity in order to be transferred to the next process, when the predetermined concentration is reached, the reactor water outlet valve 2 is closed. is closed and stored while maintaining a predetermined concentration.
この一連の操作は手動によっても行なえるものであるが
、槽内下層にスラッジ濃度計を設置し、設定濃度値に発
する電気信号とシ戸水出ロ弁２とを連動させることによ
り、自動操作も可能なものである。This series of operations can be performed manually, but it can also be performed automatically by installing a sludge concentration meter in the lower layer of the tank and linking the electric signal emitted at the set concentration value with the water outlet valve 2. It is possible.
第【図に図示した装置では、スラッジ濃度の調整域か下
層に限られるため、次工程への少量移送設備に適するも
のであるが、天日乾燥床等、短期大量に移送する設備で
は、濃度調整域を拡大する必要がある。The device shown in Fig. [Fig. It is necessary to expand the adjustment range.
なお図において、８はスラッジ引抜ポンプで、９は前記
ブレード７を回転させる駆動装置（モータ）である。In the figure, 8 is a sludge drawing pump, and 9 is a drive device (motor) for rotating the blade 7.
第２図に示すものは、第１図の装置におけるブレード７
に代えて、回転バドル翼ｌＯを備えたもので、この場合
、濃度調整域はパドル径により決定されるほかは、第１
図に示す装置とその構成１作用は異ならないから、その
説明は省略する。What is shown in FIG. 2 is the blade 7 in the device of FIG.
Instead, it is equipped with a rotating paddle blade lO, and in this case, the concentration adjustment range is determined by the paddle diameter, and the first
Since the apparatus shown in the figure and its configuration 1 and operation are the same, the explanation thereof will be omitted.
さらに、これらの１炉床と、その直上の汚泥の攪拌混合
を行なう掻寄装置との相互作用の機能を５濃縮槽底部以
外に槽中間部に設けて、二段式として汚泥濃縮の効率化
を計ることができる。Furthermore, the function of interaction between these 1 hearth and the scraping device that stirs and mixes the sludge directly above it is provided in the middle of the 5 thickening tanks in addition to the bottom of the tank, making sludge thickening more efficient as a two-stage system. can be measured.
〔発明の効果Ｊ
この発明の装置により、濃縮槽で濃縮されるスラッジ濃
度は季節を問わず、従来方式に比べ高濃度にかつ一定に
調整し得ることから、設備容量を：成葉化できると共に
１次工程の脱水設備効率を高められるものである。[Effects of the invention J] With the device of this invention, the concentration of sludge concentrated in the thickening tank can be adjusted to a higher and constant concentration than the conventional method regardless of the season. The efficiency of the dewatering equipment in the primary process can be increased.
また、現在４８ａ中の設備において、取水水源の水質悪
化により、自然濃縮濃度が低下し、容量不足となってい
る例か多くみられるが、躯体構造物を小規模の改修を施
すことによりこの発明の設備に改造できることから、こ
の問題解決に役立つものである。In addition, there are currently many cases in which 48A facilities are experiencing capacity shortages due to deterioration in the quality of the intake water source, resulting in a drop in natural concentration and a lack of capacity. It is useful for solving this problem because it can be modified to the same type of equipment.
第１ａｄはこの発明の実施例の竪断面図で。 第２図は他の実施例の竪断面図である。 なお図において、 １ｉ戸床 ２８戸水出口弁 ３ ＩＩＩ縮槽 である。 攪拌掻寄装置 第 図 １：濾床 ２：濾水出口弁 ３：濃縮１ ４：撹拌掻寄装置 1.ad is a vertical sectional view of an embodiment of the present invention. FIG. 2 is a vertical sectional view of another embodiment. In the figure, 1i Todoko 28 door water outlet valve 3 III It is. Stirring and scraping device No. figure 1: Filter bed 2: Drainage outlet valve 3: Concentration 1 4: Stirring and scraping device
Claims (4)
上に汚泥の撹拌、混合を行なう掻寄装置を設け、ろ床の
ろ過脱水作用と、ろ床直上の脱水による濃厚汚泥の攪拌
、混合作用との相互作用の繰り返えしによつて、ろ過脱
水を促進し、スラッジ濃度を調整することを特徴とする
スラッジ濃縮槽。(1) A filter bed is provided at the bottom of the sludge thickening tank, and a scraping device for agitating and mixing the sludge is installed directly above the filter bed. A sludge thickening tank characterized by promoting filtration and dehydration and adjusting sludge concentration through repeated interactions with stirring and mixing actions.
う掻寄装置との相互作用の機能を濃縮槽底部以外に槽中
間部に設けて二段式として汚泥濃縮の効率化を計ること
を特徴とする請求項１記載のスラッジ濃縮槽。(2) The function of interaction between the hearth and the scraping device that stirs and mixes the sludge directly above it is provided in the middle of the tank, in addition to the bottom of the thickening tank, in order to improve the efficiency of sludge thickening as a two-stage system. The sludge thickening tank according to claim 1, characterized in that:
ラッジ濃縮槽。(3) The sludge concentration tank according to claim 1 or 2, wherein the filter bed is a sand filter bed.
請求項１又は２記載のスラッジ濃縮槽。(4) The sludge concentration tank according to claim 1 or 2, wherein the filter bed is a porous filter bed such as a ceramic filter bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63212421A JPH0263505A (en) | 1988-08-29 | 1988-08-29 | Sludge concentration tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63212421A JPH0263505A (en) | 1988-08-29 | 1988-08-29 | Sludge concentration tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0263505A true JPH0263505A (en) | 1990-03-02 |
Family
ID=16622311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63212421A Pending JPH0263505A (en) | 1988-08-29 | 1988-08-29 | Sludge concentration tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0263505A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5259955A (en) * | 1991-07-10 | 1993-11-09 | Bolton Joseph A | Vacuum strainer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5471471A (en) * | 1977-11-17 | 1979-06-08 | Toray Ind Inc | Thin sludge concentration (or condensing) device |
-
1988
- 1988-08-29 JP JP63212421A patent/JPH0263505A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5471471A (en) * | 1977-11-17 | 1979-06-08 | Toray Ind Inc | Thin sludge concentration (or condensing) device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5259955A (en) * | 1991-07-10 | 1993-11-09 | Bolton Joseph A | Vacuum strainer |
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