JP2002126408A - Structure for preventing bridge of granular filter media in moving bed type upflow filtration equipment - Google Patents
Structure for preventing bridge of granular filter media in moving bed type upflow filtration equipmentInfo
- Publication number
- JP2002126408A JP2002126408A JP2000330872A JP2000330872A JP2002126408A JP 2002126408 A JP2002126408 A JP 2002126408A JP 2000330872 A JP2000330872 A JP 2000330872A JP 2000330872 A JP2000330872 A JP 2000330872A JP 2002126408 A JP2002126408 A JP 2002126408A
- Authority
- JP
- Japan
- Prior art keywords
- bridge
- sand
- moving bed
- bed type
- filter media
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/46—Regenerating the filtering material in the filter
- B01D24/4668—Regenerating the filtering material in the filter by moving the filtering element
- B01D24/4689—Displacement of the filtering material to a compartment of the filtering device for regeneration
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は下水処理の用水設備
・高度処理設備において使用する砂等の濾粒材層中に原
水を上向きに流すことにより原水を濾過する移床式上向
流濾過装置の濾粒材ブリッジ防止機構に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving bed type upward flow filtration apparatus for filtering raw water by flowing raw water upward through a filter material layer of sand or the like used in sewage treatment water equipment and advanced treatment equipment. And a mechanism for preventing bridging of the filter material.
【０００２】[0002]
【従来の技術】図１は、従来のこの種の移床式上向流濾
過装置の構成例を示す図である。移床式上向流濾過装置
は原水Ｗ０が濾過砂層を上向きに通過する際に濾過され
る上向流砂濾過機構１と、該上向流砂濾過機構１の上部
に配置された汚れた砂を洗浄する砂洗浄機構２を具備し
ている。上向流砂濾過機構１は濾過用の砂４が収容され
る筒状の槽体３を具備し、該槽体３内にはディストリビ
ュータ５、コーンバッフル６、及びエアーリフト管７等
が配置されて構成されている。2. Description of the Related Art FIG. 1 is a view showing an example of the configuration of a conventional moving bed type upward flow filter of this type. The moving bed type upward flow filtration device is for cleaning the upward flow sand filtration mechanism 1 which is filtered when the raw water W0 passes upward through the filter sand layer, and the dirty sand disposed above the upward flow sand filtration mechanism 1. A sand washing mechanism 2 is provided. The upward flowing sand filtration mechanism 1 includes a cylindrical tank body 3 in which sand 4 for filtration is stored. In the tank body 3, a distributor 5, a cone baffle 6, an air lift pipe 7, and the like are arranged. It is configured.
【０００３】砂洗浄機構２は洗浄排水ボックス８を具備
し、該洗浄排水ボックス８内にはエアーリフト管７の吐
出口９が配置され、該エアーリフト管７で運ばれた汚れ
た砂４が該吐出口９を通して吐出されるようになってい
る。ポンプ（図示せず）で送られた原水Ｗ０は原水流入
管１０より立ち上がり管１１を流れてデストリビュータ
５に噴出し、上向流砂濾過機構１の下部の砂層に均一に
分散され、該砂層を通って濾過される。濾過水Ｗ１は集
水トラフ１２を越流して濾過水吐出口１３から吐出され
る。The sand washing mechanism 2 has a washing drain box 8, in which a discharge port 9 of an air lift pipe 7 is arranged, and the dirty sand 4 carried by the air lift pipe 7 is provided. The ink is discharged through the discharge port 9. The raw water W0 sent by the pump (not shown) flows from the raw water inflow pipe 10 through the riser pipe 11 and gushes to the distributor 5, and is uniformly dispersed in the lower sand layer of the upward flow sand filter mechanism 1, and the sand layer is removed. Filtered through. The filtered water W1 flows over the collecting trough 12 and is discharged from the filtered water discharge port 13.
【０００４】ＳＳ等の汚染物を捕捉し汚れた砂４はエア
ーリフト管７内を上昇中に攪拌され、汚染物は分離さ
れ、砂４は上記のように洗浄排水ボックス８内に排出さ
れる。洗浄排水ボックス８内には濾過水導入口１４から
濾過水Ｗ１が導入されるようになっており、洗浄排水ボ
ックス８内に排出された砂４はこの濾過水Ｗ１により洗
浄され、洗浄排水ボックス８の傾斜した底面とバッフル
板１５の間の間隙を通って洗浄排水ボックス８の底部に
設けられた砂排出筒１６内に堆積する。The contaminants such as SS are contaminated and the sand 4 is stirred while rising in the air lift pipe 7, the contaminants are separated, and the sand 4 is discharged into the washing and draining box 8 as described above. . The filtered water W1 is introduced into the washing drain box 8 from the filtered water inlet 14, and the sand 4 discharged into the washing drain box 8 is washed by the filtered water W1. Through the gap between the inclined bottom surface and the baffle plate 15 and accumulates in the sand discharge tube 16 provided at the bottom of the washing and draining box 8.
【０００５】砂排出筒１６の下端開口はボール等のフロ
ート式閉塞体１７で閉塞されており、上記砂排出筒１６
内に堆積した砂４の下降力がフロート式閉塞体１７の浮
上力を越えるとフロート式閉塞体１７が沈み該砂４は排
出され、上向流砂濾過機構１の砂層内に戻る。上記砂４
を洗浄した洗浄排水Ｗ２は流量調整板１８を越流して洗
浄水排出口１９から排出される。洗浄排水ボックス８内
の水面に溜まったスカムは、スカム排出板２０より越流
し、洗浄排水Ｗ２と共に排出される。なお、図１におい
て、２１は原水エアー抜管である。The lower end opening of the sand discharge tube 16 is closed by a float type closing member 17 such as a ball.
When the descending force of the sand 4 accumulated in the inside exceeds the floating force of the float type closure 17, the float type closure 17 sinks and the sand 4 is discharged and returns into the sand layer of the upward flow sand filtration mechanism 1. Sand 4 above
Is discharged from the washing water discharge port 19 after flowing through the flow rate adjusting plate 18. The scum accumulated on the water surface in the washing drain box 8 overflows the scum discharging plate 20, and is discharged together with the washing drain W2. In addition, in FIG. 1, 21 is a raw water air vent.
【０００６】上記構成の移床式上向流濾過装置におい
て、上向流砂濾過機構１の槽体３の底部において、濾粒
材である砂４のブリッジが発生すると、砂４の流動性が
失われ運転ができない（濾過性能が劣化する）という問
題がある。特にバッチ運転を繰り返した後、長期間休止
状態にすると槽体３底部の砂４がブリッジを起こして運
転ができなくなるという問題があった。[0006] In the upward flow filter of the above-structured bed, when a bridge of sand 4 as a filter material is generated at the bottom of the tank body 3 of the upward sand filter 1, the fluidity of the sand 4 is lost. There is a problem that operation is not possible (filtration performance is deteriorated). In particular, if the operation is suspended for a long period of time after repeating the batch operation, there is a problem that the sand 4 at the bottom of the tank body 3 causes a bridge and the operation cannot be performed.
【０００７】[0007]
【発明が解決しようとする課題】本発明は上述の点に鑑
みてなされたもので、移床式上向流濾過装置において濾
過性能が劣化し、運転ができなくなるような砂等の濾粒
材のブリッジ発生の防止及び発生したブリッジの破壊が
容易にできる移床式上向流濾過装置の濾粒材ブリッジ防
止機構を提供することを目的とする。DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a filter material such as sand which deteriorates the filtering performance and makes it impossible to operate in a moving bed type upward flow filter. It is an object of the present invention to provide a mechanism for preventing bridging of a filter material in a moving bed type upward flow filter which can prevent the occurrence of a bridge and easily break the generated bridge.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
請求項１に記載の発明は、濾粒材層を具備し、原水が該
濾粒材層中を上向きに通過する際に濾過する移床式上向
流濾過装置において、濾粒材層の濾粒材がブリッジを起
こし、濾粒材の流動性が失われるブリッジ発生部にブリ
ッジ防止機構を設けたことを特徴とする。In order to solve the above-mentioned problems, the invention according to claim 1 is provided with a filter material layer, and a filter for filtering raw water as it passes upward through the filter material layer. In the bed type upward flow filtration device, a bridging prevention mechanism is provided at a bridge generating portion where the filtering material of the filtering material layer causes a bridge and the fluidity of the filtering material is lost.
【０００９】請求項２に記載の発明は、請求項１に記載
の移床式上向流濾過装置の濾粒材ブリッジ防止機構にお
いて、ブリッジ防止機構はブリッジ発生部にブリッジ防
止配管を設け、該ブリッジ防止配管を介して該ブリッジ
発生部に圧力流体を噴出できるように構成したことを特
徴とする。According to a second aspect of the present invention, there is provided the filter material bridge preventing mechanism of the moving bed type upward flow filter according to the first aspect, wherein the bridge preventing mechanism includes a bridge preventing pipe in a bridge generating portion. It is characterized in that a pressurized fluid can be ejected to the bridge generating portion via a bridge prevention pipe.
【００１０】上記のように濾粒材層の濾粒材がブリッジ
を起こし、濾粒材の流動性が失われるブリッジ発生部に
ブリッジ防止機構を設けたので、ブリッジ発生の防止及
び発生したブリッジの破壊が容易にできるから、高い濾
過性能を維持して移床式上向流濾過装置の運転継続が可
能となる。As described above, a bridge preventing mechanism is provided at a bridge generating portion where the filter material of the filter material layer causes bridging and the fluidity of the filter material is lost. Since the destruction can be easily performed, it is possible to maintain the high filtration performance and continue the operation of the transfer type upward flow filtration device.
【００１１】[0011]
【発明の実施の形態】以下、本発明の実施の形態例を図
面に基づいて説明する。図２は本発明に係る移床式上向
流濾過装置の濾粒材ブリッジ防止装置の要部構成を示す
図である。なお、本発明に係る移床式上向流濾過装置の
全体的構成は図１に示すものと同じであるのでその説明
は省略する。図２において、エアーリフト管７はエアー
リフト保護管２６内に配置され、該エアーリフト保護管
２６内でエアーリフト管７の外側に空気流入管２２、２
３が配置され、空気流入管２２の下端はエアーリフト保
護管２６内に中間供給口２４として開口し、空気流入管
２３の下端は下部供給口２５としてエアーリフト管７の
下端部に設けられた筒体３３の上部に開口している。Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a diagram showing a main configuration of a filtering material bridge preventing device of the transfer type upward flow filtration device according to the present invention. The overall configuration of the transfer-type upward-flow filtration device according to the present invention is the same as that shown in FIG. In FIG. 2, the air lift pipe 7 is disposed in an air lift protection pipe 26, and inside the air lift protection pipe 26, outside the air lift pipe 7, the air inflow pipes 22, 2.
3, the lower end of the air inflow pipe 22 is opened as an intermediate supply port 24 in the air lift protection pipe 26, and the lower end of the air inflow pipe 23 is provided at the lower end of the air lift pipe 7 as a lower supply port 25. It is open at the top of the cylinder 33.
【００１２】空気流入管２２及び空気流入管２３を通し
て流入した空気は中間供給口２４及び下部供給口２５か
ら噴出する。槽体３の底部の汚れた砂４は筒体３３の下
端から流入し、更にエアーリフト管７を通って上昇し、
上記のようにエアーリフト管７の吐出口９から該洗浄排
水ボックス８内に供給される。従って、槽体３の底部の
砂４にブリッジ２７が発生し、砂４の流動性が失われ、
移床式上向流濾過装置の運転ができなくなる。The air flowing through the air inlet pipe 22 and the air inlet pipe 23 blows out from the intermediate supply port 24 and the lower supply port 25. The dirty sand 4 at the bottom of the tank body 3 flows in from the lower end of the cylindrical body 33, and further rises through the air lift pipe 7,
As described above, the water is supplied from the discharge port 9 of the air lift pipe 7 into the cleaning and drainage box 8. Therefore, a bridge 27 is generated in the sand 4 at the bottom of the tank body 3, and the fluidity of the sand 4 is lost.
The operation of the transfer type upflow filtration device cannot be performed.
【００１３】そこで、槽体３の底部のブリッジ２７が発
生し易いブリッジ発生部にブリッジ防止配管２８を配設
し、該ブリッジ防止配管に圧力流体源２９から圧縮空気
又は圧力水等の圧力流体を供給して、発生したブリッジ
２７を破壊したり、ブリッジが発生しがたい状態とす
る。これにより、槽体３の底部の砂４の流動性が確保さ
れ、運転中砂４はエアーリフト管７を通って上昇し、移
床式上向流濾過装置の濾過性能を維持できる。なお、３
０は逆止弁、３１は流量計、３２は開閉弁である。Therefore, a bridge preventing pipe 28 is provided at a bridge generating portion at the bottom of the tank body 3 where the bridge 27 is likely to be generated, and a pressure fluid such as compressed air or pressure water is supplied to the bridge preventing pipe from a pressure fluid source 29. The bridge 27 is supplied to break the generated bridge 27 or make it difficult for the bridge 27 to be generated. Thereby, the fluidity of the sand 4 at the bottom of the tank body 3 is ensured, and the sand 4 rises through the air lift pipe 7 during operation, so that the filtration performance of the transfer type upward flow filter can be maintained. In addition, 3
0 is a check valve, 31 is a flow meter, and 32 is an on-off valve.
【００１４】なお、上記例では槽体３の底部にブリッジ
防止配管２８を配設した例を説明したが、ブリッジ防止
配管２８の配設部分はこれに限定されるものではなく、
ブリッジの発生し易い場所に設け、ブリッジが発生した
場合そのブリッジを破壊し又はブリッジが発生しにくい
状態にすることができる。In the above example, the bridge prevention pipe 28 is provided at the bottom of the tank body 3. However, the arrangement of the bridge prevention pipe 28 is not limited to this.
It is provided in a place where a bridge easily occurs, and when a bridge occurs, the bridge can be broken or a state in which a bridge is hardly generated can be provided.
【００１５】また、上記実施例では、ブリッジ防止機構
としてブリッジ防止配管２８を配設し、圧縮空気又は圧
力水等の圧力流体を供給する例を示したが、ブリッジ防
止機構はこれに限定されるものではなく、例えば、ブリ
ッジが発生し易い部分に機械的振動を加えるとか、又は
ブリッジが発生し易い部分の砂層を機械的に攪拌する攪
拌機構を設けても良い。In the above embodiment, the bridge prevention pipe 28 is provided as the bridge prevention mechanism, and the pressure fluid such as the compressed air or the pressurized water is supplied. However, the bridge prevention mechanism is not limited to this. Instead, for example, mechanical vibration may be applied to a portion where bridging is likely to occur, or a stirring mechanism may be provided for mechanically stirring the sand layer in a portion where bridging is likely to occur.
【００１６】また、上記例では濾粒材として砂４を用い
る例を示したが、濾粒材は砂に限定されるものではな
く、原水を濾過する作用を有する材料からなる粒状のも
のであればよく、例えば、珪砂、セラミック粒でもよ
い。Further, in the above-mentioned example, the example in which the sand 4 is used as the filtering material has been described. However, the filtering material is not limited to the sand, and may be a granular material made of a material having an action of filtering raw water. For example, silica sand or ceramic particles may be used.
【００１７】[0017]
【発明の効果】以上、説明したように各請求項に記載の
発明によれば、下記のような優れた効果が得られる。As described above, according to the invention described in each claim, the following excellent effects can be obtained.
【００１８】濾粒材層の濾粒材がブリッジを起こし、濾
粒材の流動性が失われるブリッジ発生部にブリッジ防止
機構を設けたので、ブリッジ発生の防止及び発生したブ
リッジの破壊が容易にできるから、高い濾過性能を維持
して移床式上向流濾過装置の運転継続が可能となる。[0018] A bridge preventing mechanism is provided at a bridge generating portion where the filter granules of the filter granule layer cause bridging and the fluidity of the filter granules is lost, so that the occurrence of bridges and the breakage of the generated bridges can be easily performed. Therefore, it is possible to maintain the high filtration performance and continue the operation of the bed-type upward-flow filtration device.
【図１】従来の移床式上向流濾過装置の構成を示す図で
ある。FIG. 1 is a diagram showing a configuration of a conventional moving bed type upward flow filtration device.
【図２】本発明に係る移床式上向流濾過装置の濾粒材ブ
リッジ防止装置の要部構成を示す図である。FIG. 2 is a diagram showing a main configuration of a filtering material bridge preventing device of the transfer type upward flow filtering device according to the present invention.
１ 上向流砂濾過機構 ２ 砂洗浄機構 ３ 槽体 ４ 砂 ５ ディストリビュータ ６ コーンバッフル ７ エアーリフト管 ８ 洗浄排水ボックス ９ 吐出口 １０ 原水流入管 １１ 立ち上がり管 １２ 集水トラフ １３ 濾過水吐出口 １４ 濾過水導入口 １５ バッフル板 １６ 砂排出筒 １７ フロート式閉塞体 １８ 流量調整板 １９ 洗浄水排出口 ２０ スカム排出板 ２１ 原水エアー抜管 ２２ 空気流入管 ２３ 空気流入管 ２４ 中間供給口 ２５ 下部供給口 ２６ エアーリフト保護管 ２７ ブリッジ ２８ ブリッジ防止配管 ２９ 圧力流体源 ３０ 逆止弁 ３１ 流量計 ３２ 開閉弁 ３３ 筒体 DESCRIPTION OF SYMBOLS 1 Upflow sand filtration mechanism 2 Sand washing mechanism 3 Tank body 4 Sand 5 Distributor 6 Corn baffle 7 Air lift pipe 8 Washing drain box 9 Discharge port 10 Raw water inflow pipe 11 Rise pipe 12 Collecting trough 13 Filtration water discharge port 14 Filtration water Inlet 15 Baffle plate 16 Sand discharge cylinder 17 Float type closing body 18 Flow control plate 19 Washing water discharge port 20 Scum discharge plate 21 Raw water air discharge pipe 22 Air inflow pipe 23 Air inflow pipe 24 Intermediate supply port 25 Lower supply port 26 Air lift Protection tube 27 Bridge 28 Bridge prevention piping 29 Pressure fluid source 30 Check valve 31 Flow meter 32 Open / close valve 33 Cylindrical body
Claims (2)
を上向きに通過する際に濾過する移床式上向流濾過装置
において、 前記濾粒材層の濾粒材がブリッジを起こし、濾粒材の流
動性が失われるブリッジ発生部にブリッジ防止機構を設
けたことを特徴とする移床式上向流濾過装置の濾粒材ブ
リッジ防止機構。1. A moving bed type upward flow filtration device comprising a filter material layer and filtering raw water as it passes upward through the filter material layer, wherein the filter material of the filter material layer is A bridging prevention mechanism is provided in a moving bed upward flow filtration device, wherein a bridging prevention mechanism is provided at a bridge generating portion where a bridging occurs and the fluidity of the filtering material is lost.
の濾粒材ブリッジ防止機構において、 前記ブリッジ防止機構はブリッジ発生部にブリッジ防止
配管を設け、該ブリッジ防止配管を介して該ブリッジ発
生部に圧力流体を噴出できるように構成したことを特徴
とする移床式上向流濾過装置の濾粒材ブリッジ防止機
構。2. The filter material bridging prevention mechanism of the moving bed type upward flow filtration device according to claim 1, wherein the bridge prevention mechanism is provided with a bridge prevention pipe at a bridge generating portion, and the bridge prevention pipe is connected through the bridge prevention pipe. A filter material bridge preventing mechanism of a transfer type upward flow filter, wherein a pressurized fluid is ejected to the bridge generating portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000330872A JP2002126408A (en) | 2000-10-30 | 2000-10-30 | Structure for preventing bridge of granular filter media in moving bed type upflow filtration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000330872A JP2002126408A (en) | 2000-10-30 | 2000-10-30 | Structure for preventing bridge of granular filter media in moving bed type upflow filtration equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002126408A true JP2002126408A (en) | 2002-05-08 |
Family
ID=18807310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000330872A Pending JP2002126408A (en) | 2000-10-30 | 2000-10-30 | Structure for preventing bridge of granular filter media in moving bed type upflow filtration equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002126408A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013516316A (en) * | 2010-01-08 | 2013-05-13 | パークソン コーポレーション | Apparatus for treating liquids containing impurities |
| JP2014069130A (en) * | 2012-09-28 | 2014-04-21 | Kubota Corp | Moving-bed type filter tank, and clarification tank |
| JP2020062600A (en) * | 2018-10-17 | 2020-04-23 | 株式会社タクマ | Method for crushing fixed sand layer of transfer bed type sand filtration device, transfer bed type sand filtration device and method for operating transfer bed type sand filtration device |
-
2000
- 2000-10-30 JP JP2000330872A patent/JP2002126408A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013516316A (en) * | 2010-01-08 | 2013-05-13 | パークソン コーポレーション | Apparatus for treating liquids containing impurities |
| JP2014069130A (en) * | 2012-09-28 | 2014-04-21 | Kubota Corp | Moving-bed type filter tank, and clarification tank |
| JP2020062600A (en) * | 2018-10-17 | 2020-04-23 | 株式会社タクマ | Method for crushing fixed sand layer of transfer bed type sand filtration device, transfer bed type sand filtration device and method for operating transfer bed type sand filtration device |
| JP7122217B2 (en) | 2018-10-17 | 2022-08-19 | 株式会社タクマ | Method for crushing stuck sand layer of moving-bed sand filter, moving-bed sand filter, and method for operating moving-bed sand filter |
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