JP2001219009A - Filter medium filling type filter device - Google Patents
Filter medium filling type filter deviceInfo
- Publication number
- JP2001219009A JP2001219009A JP2000030467A JP2000030467A JP2001219009A JP 2001219009 A JP2001219009 A JP 2001219009A JP 2000030467 A JP2000030467 A JP 2000030467A JP 2000030467 A JP2000030467 A JP 2000030467A JP 2001219009 A JP2001219009 A JP 2001219009A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- filter medium
- filled
- diameter
- filling type
- 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.)
- Withdrawn
Links
Landscapes
- Filtration Of Liquid (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】 本発明は、ろ材流れ出し防
止スクリーンの目詰まりを生ずることなく長時間にわた
り安定してろ過処理を行うことができるろ材充填式ろ過
装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter medium-filled filtration device capable of performing a filtration treatment stably for a long time without causing clogging of a filter medium outflow prevention screen.
【０００２】[0002]
【従来の技術】 従来から、廃水中の高濃度ＳＳ除去を
目的とするろ過装置として、処理槽１１の下段に大きな
径の浮上性ろ材を充填した第１層１２を設け、上段にそ
れよりも小さな径の浮上性ろ材を充填した第２層１３を
設けて、廃水を第１層から第２層に向け流入するように
した上向流式のろ材充填式ろ過装置が知られている。こ
の装置においては、空隙率の大きなろ材を利用すること
によりＳＳの捕捉量を大きく、かつ圧損を小さくできる
ため、高濃度にＳＳを含む廃水に対しても効率的にＳＳ
除去を行うことができるうえに、ろ材の洗浄もエアレー
ション攪拌法で簡単に行うことができ、その頻度も少な
くて済むという利点を有するものであった。2. Description of the Related Art Conventionally, as a filtration device for removing high-concentration SS in wastewater, a first layer 12 filled with a large-diameter buoyant filter medium is provided in a lower stage of a treatment tank 11 and an upper layer is provided in an upper stage. 2. Description of the Related Art There is known an upward-flow type filter medium-filled filtration device in which a second layer 13 filled with a small-diameter buoyant filter medium is provided so that wastewater flows from the first layer to the second layer. In this apparatus, since the amount of trapped SS can be increased and the pressure loss can be reduced by using a filter medium having a large porosity, the SS can be efficiently used for wastewater containing SS at a high concentration.
In addition to the removal, the filter medium can be easily washed by the aeration stirring method, and has the advantage of reducing the frequency.
【０００３】 しかしながら、前記のような従来の２層
式のろ過装置においては、第２層に充填したろ材の径が
小さいために、上部に設けてあるろ材流れ出し防止スク
リーン１５の孔部にろ材が挟まってしまい、閉塞を生じ
るという現象があった。この結果、圧損が大きくなって
ろ過効率が下がるという問題点があり、これを解消する
のに頻繁に洗浄処理を施す必要が生じるという問題点が
あった。However, in the conventional two-layer filtration device as described above, since the diameter of the filter medium filled in the second layer is small, the filter medium is placed in the hole of the filter medium prevention screen 15 provided at the upper part. There was a phenomenon of being caught and causing blockage. As a result, there is a problem that the pressure loss is increased and the filtration efficiency is reduced, and there is a problem that it is necessary to frequently perform a cleaning process to solve the problem.
【０００４】[0004]
【発明が解決しようとする課題】 本発明は上記のよう
な従来の問題点を解決して、ろ材流れ出し防止スクリー
ンの目詰まりを生ずることなく長時間にわたり安定して
ろ過処理を行うことができるろ材充填式ろ過装置を提供
することを目的として完成されたものである。適用先と
して、下水中懸濁物の高速処理、初期雨水の処理、河川
水の浄化処理等が考えられる。DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems and provides a filter medium capable of performing a filtration treatment stably for a long time without causing clogging of a screen for preventing a filter medium from flowing out. It has been completed for the purpose of providing a filling type filtration device. Possible applications include high-speed treatment of sewage suspended matter, treatment of initial rainwater, purification treatment of river water, and the like.
【０００５】[0005]
【課題を解決するための手段】 上記の課題を解決する
ためになされた本発明のろ材充填式ろ過装置は、処理槽
の下段に大きな径の浮上性ろ材を充填した第１層を設
け、上段にそれよりも小さな径の浮上性ろ材を充填した
第２層を設けた上向流式のろ材充填式ろ過装置におい
て、前記第２層の上部に該第２層のろ材よりも比重が小
さく径の大きな浮上性ろ材を充填した第３層を設けたこ
とを特徴とするものである。Means for Solving the Problems To solve the above-mentioned problems, a filter medium-filled filtration device of the present invention is provided with a first layer filled with a large-diameter buoyant filter medium in a lower stage of a treatment tank, An upflow-type filter medium-filled filtration device provided with a second layer filled with a buoyant filter medium having a smaller diameter, the specific gravity of which is smaller than that of the second layer in the upper part of the second layer. Characterized in that a third layer filled with a buoyant filter medium having a large size is provided.
【０００６】 なお、前記各層のろ材の比重を第１層か
ら第３層に向け順次小さくなるようにしておけば、ろ材
洗浄処理を施した後に成層化する時間を短くできるので
好ましい。また第１層および第３層のろ材の外径が、第
２層のろ材の外径の２倍以内となるようにしておけば、
ろ過処理をする過程で各層が逆転することなく好まし
い。It is preferable that the specific gravity of the filter medium in each layer be gradually reduced from the first layer to the third layer, since the time for stratification after the filter medium cleaning treatment can be shortened. Also, if the outer diameter of the first layer and the third layer of the filter medium is set to be within twice the outer diameter of the second layer of the filter medium,
It is preferable that each layer does not reverse in the process of performing the filtration treatment.
【０００７】[0007]
【発明の実施の形態】 以下に、図面を参照しつつ本発
明の好ましい実施の形態を示す。図１において、１は処
理槽であり、この処理槽１の下段には大きな径の浮上性
ろ材を充填した第１層２が設けられ、上段にはそれより
も小さな径の浮上性ろ材を充填した第２層３が設けられ
て、処理すべき原水を第１層から第２層に向け流入する
ようにしてある。なお、５はろ材流れ出し防止スクリー
ン、６は漏斗状に形成された自然沈降部であり、以上の
構成よりなる点は従来の上向流式のろ材充填式ろ過装置
と基本的に同じである。Preferred embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a processing tank, and a lower layer of the processing tank 1 is provided with a first layer 2 filled with a large-diameter floating medium, and an upper layer is filled with a small-diameter floating medium. A second layer 3 is provided so that raw water to be treated flows from the first layer toward the second layer. Reference numeral 5 denotes a filter medium outflow prevention screen, and reference numeral 6 denotes a natural settling portion formed in a funnel shape. The above-described configuration is basically the same as that of a conventional upward-flow type filter medium-filled filtration device.
【０００８】 そして、本発明では前記第２層３の上部
に該第２層３のろ材よりも大きな径の浮上性ろ材を充填
した第３層４を設けた点に特徴的構成を有する。このよ
うな構成とすることにより、ろ材による効率的なろ過処
理を行えることは勿論のこと、ろ過処理中において従来
のように第２層３の比較的小さな径の浮上性ろ材がろ材
流れ出し防止スクリーン５の孔部に挟まって閉塞を発生
させるという現象を的確に防止するのである。即ち、第
１層２のろ材の径を大きくすることによりろ層全体に汚
濁物を抑留させるため、原水の流入端における短時間の
閉塞を防止し、第２層３のろ材の径を小さくすることに
より浮遊物質を高度に遮断、捕捉し、更には、第３層４
のろ材の径を大きくすることにより小さな径の第２層３
のろ材がろ材流れ出し防止スクリーン５を閉塞すること
を防止して、長期間にわたり安定したろ過処理を行える
ようにするのである。なお、本装置は単独で設置される
場合もあれば、下水処理場の既存の最初沈殿池の一部を
区分して設置される場合もある。The present invention has a characteristic configuration in that a third layer 4 filled with a buoyant filter medium having a diameter larger than the filter medium of the second layer 3 is provided above the second layer 3. By adopting such a configuration, not only can the filter medium be efficiently filtered, but also the filter medium having a relatively small diameter of the second layer 3 can prevent the filter medium from flowing out as in the prior art during the filtration processing. This prevents the phenomenon of clogging between the holes of No. 5 properly. That is, since the contaminants are suppressed in the entire filter layer by increasing the diameter of the filter medium of the first layer 2, a short-time blockage at the inflow end of the raw water is prevented, and the diameter of the filter medium of the second layer 3 is reduced. To capture and trap suspended matter at a high level.
The second layer 3 having a small diameter by increasing the diameter of the filter medium
This prevents the filter medium from blocking the filter medium outflow prevention screen 5 so that stable filtration can be performed over a long period of time. In addition, this apparatus may be installed alone, or may be installed separately from a part of the existing first sedimentation basin of the sewage treatment plant.
【０００９】 前記浮上性ろ材としては、比重が１．０
よりも小さな浮上性合成樹脂（例えば、ポリエチレン化
合物、ポリプロピレン化合物や発泡スチロール等）から
なるものである。第１層のものは外径５〜１５mm、第２
層のものは外径１〜５mmの空隙率の大きなものが望まし
い。このように空隙率の大きなろ材を使用することで、
ＳＳの捕捉量を大きくし、かつ圧損小さくして効率的な
ろ過処理を達成している。第３層は第１層、第２層の支
持層になるため比重が小さく堅固な球形のものが望まし
い。The buoyant filter medium has a specific gravity of 1.0
It is made of a smaller buoyant synthetic resin (for example, a polyethylene compound, a polypropylene compound, or styrene foam). The first layer has an outer diameter of 5 to 15 mm,
The layer is preferably one having an outer diameter of 1 to 5 mm and a large porosity. By using a filter medium with a large porosity in this way,
An efficient filtration process is achieved by increasing the amount of trapped SS and reducing the pressure loss. Since the third layer is a support layer for the first and second layers, it is preferable that the third layer has a small specific gravity and a solid spherical shape.
【００１０】 また、前記各層のろ材の比重を第１層か
ら第３層に向け順次小さくなるようにしておけば、後述
するろ材の洗浄処理を施した際に、第１層から第３層ま
で成層化する時間を短くでき、ろ材の洗浄処理を施した
後に各層が逆転することなく元通りの層構造に成層化で
き好ましい。また第１層および第３層のろ材の外径が、
第２層のろ材の外径の２倍以内となるようにしておけ
ば、ろ過処理中にろ材の落ち込みによる層の乱れは発生
しない。In addition, if the specific gravity of the filter medium in each of the layers is made to decrease gradually from the first layer to the third layer, the first to third layers are obtained when the filter medium is washed as described below. The time required for stratification can be shortened, and the layers can be stratified to the original layer structure without inverting each other after the filter medium is subjected to the washing treatment, which is preferable. Also, the outer diameter of the filter media of the first and third layers is
If the outer diameter of the filter medium in the second layer is set to be not more than twice as large, the layer will not be disturbed due to the falling of the filter medium during the filtration process.
【００１１】 次に、ろ材の洗浄方法について説明す
る。図３は、流入を続行したままろ材を洗浄する場合を
示すもので、処理槽１の下部よりブロワからエアを吹き
込み、ろ材をエアレーション攪拌することにより洗浄す
る。洗浄排水は、処理槽１の上部にあるバルブ（図示せ
ず）の切替えによって洗浄排水配管へ流出させる。この
排水は捕集されたＳＳを高濃度に含むものであり、常法
に従い別途処理する。また、図４は流入を停止した状態
でろ材を洗浄する場合を示すもので、流入を一旦停止し
てブロワからエアを吹き込み、ろ材をエアレーション攪
拌して洗浄し、洗浄排水は下部沈降部６の汚泥引抜き口
より排水する。なお、以上のようなろ材の洗浄は、損失
水頭が所定の閾値を越えた場合や、一定処理時間経過後
といった一定条件のもとで自動的に行われることとな
る。Next, a method for cleaning the filter medium will be described. FIG. 3 shows a case in which the filter medium is washed while the inflow is continued. Air is blown from a lower portion of the processing tank 1 from a blower, and the filter medium is washed by aeration and stirring. The washing wastewater is caused to flow out to the washing wastewater pipe by switching a valve (not shown) at the upper part of the processing tank 1. This wastewater contains the collected SS at a high concentration and is separately treated according to a conventional method. FIG. 4 shows a case where the filter medium is washed with the inflow stopped, in which the inflow is temporarily stopped, air is blown from a blower, the filter medium is agitated and washed, and the washing drainage is discharged from the lower settling portion 6. Drain from the sludge outlet. The washing of the filter medium as described above is automatically performed under certain conditions such as when the head loss exceeds a predetermined threshold or after a certain processing time has elapsed.
【００１２】[0012]
【実施例】 次に、本発明の実施例につき説明する。表
１に示すろ材を用いて、処理槽１内に下方より第１層
２、第２層３、第３層４よりなるろ過部を形成し、第３
層の上部にはろ材流れ出し防止スクリーン５を設置し
た。このろ過装置を用いて、実合流下水を連続運転処理
したところ、水面積負荷５０〜２５０m/日の範囲で安定
した処理を行うことができた。除去性能としては、平均
ＳＳ濃度６００mg／Ｌ、平均ＢＯＤ値３５０mg／Ｌの流
入水に対し、ＳＳ除去率が平均８５％、ＢＯＤ除去率が
平均６０％で満足のいく処理ができた。なお、ろ過処理
の継続時間を１０時間として一定周期でろ材の洗浄処理
を行ったが、ろ過処理及び洗浄過程においてろ材流れ出
し防止スクリーンの目詰まりを生ずることは全くなかっ
た。また第１層、第２層、第３層はろ過時に逆転するこ
ともなくエアレーション攪拌洗浄過程でろ材を攪拌した
後も、通水を開始した後にその水流により成層化できる
ことも確認できた。Next, examples of the present invention will be described. Using the filter media shown in Table 1, a filtration section composed of a first layer 2, a second layer 3, and a third layer 4 is formed from below in the treatment tank 1, and
On the upper part of the layer, a filter medium prevention screen 5 was provided. When the actual combined sewage was subjected to continuous operation treatment using this filtration device, stable treatment could be performed within a water area load of 50 to 250 m / day. Regarding the removal performance, satisfactory treatment was possible with an SS removal rate of 85% on average and a BOD removal rate of 60% on average for inflow water having an average SS concentration of 600 mg / L and an average BOD value of 350 mg / L. In addition, the filter medium was washed at a constant cycle with the duration of the filtration being 10 hours. However, no clogging of the filter outflow prevention screen occurred during the filtration and the washing process. In addition, it was also confirmed that the first layer, the second layer, and the third layer were not reversed during filtration, and even after the filter medium was stirred in the aeration stirring washing process, stratification could be performed by the water flow after water flow was started.
【００１３】[0013]
【表１】 [Table 1]
【００１４】[0014]
【発明の効果】 以上の説明からも明らかなように、本
発明はろ材流れ出し防止スクリーンの目詰まりを生ずる
ことなく長時間にわたり安定してろ過処理を行うことが
できるものである。よって本発明は従来の問題点を一掃
したろ材充填式ろ過装置として、産業の発展に寄与する
ところは極めて大である。As is clear from the above description, the present invention can stably perform a filtration treatment for a long time without causing clogging of the screen for preventing the filter medium from flowing out. Therefore, the present invention has an extremely large contribution to industrial development as a filter medium-filled filtration device that has eliminated the conventional problems.
【図面の簡単な説明】[Brief description of the drawings]
【図１】 本発明の実施の形態を示す正面図である。FIG. 1 is a front view showing an embodiment of the present invention.
【図２】 従来例を示す正面図である。FIG. 2 is a front view showing a conventional example.
【図３】 ろ材の洗浄方法を示す説明図である。FIG. 3 is an explanatory view showing a method for cleaning a filter medium.
【図４】 その他のろ材の洗浄方法を示す説明図であ
る。FIG. 4 is an explanatory view showing another method for cleaning a filter medium.
１：処理槽、２：第１層、３：第２層、４：第３層、
５：ろ材流れ出し防止スクリーン1: processing tank, 2: first layer, 3: second layer, 4: third layer,
5: Filter media outflow prevention screen
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮田 篤 愛知県名古屋市瑞穂区須田町２番56号 日 本碍子株式会社内 Ｆターム(参考） 4D041 BA21 BB07 BB13 BB23 BB25 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Atsushi Miyata 2-56, Suda-cho, Mizuho-ku, Nagoya-shi, Aichi F-term in Japan Insulators Co., Ltd. 4D041 BA21 BB07 BB13 BB23 BB25
Claims (3)
充填した第１層を設け、上段にそれよりも小さな径の浮
上性ろ材を充填した第２層を設けた上向流式のろ材充填
式ろ過装置において、前記第２層の上部に該第２層のろ
材よりも比重が小さく径の大きな浮上性ろ材を充填した
第３層を設けたことを特徴とするろ材充填式ろ過装置。An upflow type in which a first layer filled with a large-diameter buoyant filter medium is provided in a lower stage of a treatment tank, and a second layer filled with a buoyant filter medium of a smaller diameter is provided in an upper stage. A filter medium-filled filtration apparatus, wherein a third layer filled with a buoyant filter medium having a smaller specific gravity and a larger diameter than the filter medium of the second layer is provided above the second layer. .
向け順次小さくなっている請求項１に記載のろ材充填式
ろ過装置。2. The filter medium-filled filtration device according to claim 1, wherein the specific gravity of the filter medium in each layer gradually decreases from the first layer to the third layer.
２層のろ材の外径の２倍以内である請求項１または２に
記載のろ材充填式ろ過装置。3. The filter medium-filled filtration device according to claim 1, wherein the outer diameter of the first and third layers of the filter medium is within twice the outer diameter of the second layer of the filter medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000030467A JP2001219009A (en) | 2000-02-08 | 2000-02-08 | Filter medium filling type filter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000030467A JP2001219009A (en) | 2000-02-08 | 2000-02-08 | Filter medium filling type filter device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001219009A true JP2001219009A (en) | 2001-08-14 |
Family
ID=18555474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000030467A Withdrawn JP2001219009A (en) | 2000-02-08 | 2000-02-08 | Filter medium filling type filter device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001219009A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006255507A (en) * | 2005-03-15 | 2006-09-28 | Ngk Insulators Ltd | Sludge dehydration system |
| JP2013192982A (en) * | 2012-03-16 | 2013-09-30 | Ishigaki Co Ltd | Filter |
| JP2014018741A (en) * | 2012-07-19 | 2014-02-03 | Kazunori Koishi | Upward filtration apparatus equipped with fine particle filter medium |
| KR20190003032A (en) * | 2017-06-30 | 2019-01-09 | 주식회사 미래지앤씨 | Fluid filtration apparatus |
-
2000
- 2000-02-08 JP JP2000030467A patent/JP2001219009A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006255507A (en) * | 2005-03-15 | 2006-09-28 | Ngk Insulators Ltd | Sludge dehydration system |
| JP2013192982A (en) * | 2012-03-16 | 2013-09-30 | Ishigaki Co Ltd | Filter |
| JP2014018741A (en) * | 2012-07-19 | 2014-02-03 | Kazunori Koishi | Upward filtration apparatus equipped with fine particle filter medium |
| KR20190003032A (en) * | 2017-06-30 | 2019-01-09 | 주식회사 미래지앤씨 | Fluid filtration apparatus |
| KR101958285B1 (en) * | 2017-06-30 | 2019-03-15 | 주식회사 미래지앤씨 | Fluid filtration apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6049005B2 (en) | Filtration device, filtration method thereof and backwashing method of filter medium | |
| JPWO2002081050A1 (en) | Rainwater treatment apparatus and combined backwash method in combined sewer system | |
| CN104338350B (en) | Automatic continuous cleaning and filtering quicksand device | |
| JP2004268005A (en) | Waste water treating equipment | |
| JP2695624B2 (en) | How to clean floating filter media | |
| JP4674188B2 (en) | Primary treatment method for combined sewage | |
| JP2001219009A (en) | Filter medium filling type filter device | |
| JP2004141724A (en) | Solid-liquid separator and washing method therefor | |
| JPH0217908A (en) | Method for washing solid-liquid separation apparatus | |
| JP2003290784A (en) | Iron and manganese remover and method for the same | |
| JP4230427B2 (en) | Treatment method in combined sewer | |
| JP2016097370A (en) | Washing method of filter basin and water treatment device | |
| JP6830037B2 (en) | Sewage treatment system | |
| JP3779634B2 (en) | Long fiber filtration device | |
| JP3824034B2 (en) | Filtration device backwash method | |
| JP2007069065A (en) | Filter | |
| JP3414480B2 (en) | Floating filtration method | |
| JP2005218991A (en) | Filtration treatment method in combined sewer system | |
| JP3729585B2 (en) | Wastewater treatment facility | |
| JP2004290752A (en) | Method for filtering confluent sewage at high speed | |
| JPH08103603A (en) | Upward current filtration method | |
| JP6343162B2 (en) | Washing method of filter layer | |
| JPH10180274A (en) | Biological filter | |
| JP2006088031A (en) | Method and apparatus for regulating flow rate, and filtration apparatus | |
| JP3666065B2 (en) | Biological filtration type nitrogen removal method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20070501 |