JPH1071305A - Moving filter bed type filter - Google Patents

Moving filter bed type filter

Info

Publication number
JPH1071305A
JPH1071305A JP9016803A JP1680397A JPH1071305A JP H1071305 A JPH1071305 A JP H1071305A JP 9016803 A JP9016803 A JP 9016803A JP 1680397 A JP1680397 A JP 1680397A JP H1071305 A JPH1071305 A JP H1071305A
Authority
JP
Japan
Prior art keywords
filter
raw water
pipe
chamber
filtrate
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.)
Granted
Application number
JP9016803A
Other languages
Japanese (ja)
Other versions
JP3903510B2 (en
Inventor
Toru Mori
亨 森
Shigeyuki Fujimura
重幸 藤村
Osamu Yamashita
修 山下
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ishigaki Co Ltd
Original Assignee
Ishigaki Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ishigaki Co Ltd filed Critical Ishigaki Co Ltd
Priority to JP01680397A priority Critical patent/JP3903510B2/en
Priority to KR1019970008934A priority patent/KR100206647B1/en
Priority to TW086103485A priority patent/TW330848B/en
Publication of JPH1071305A publication Critical patent/JPH1071305A/en
Application granted granted Critical
Publication of JP3903510B2 publication Critical patent/JP3903510B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • 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
    • B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
    • B01D24/10—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being held in a closed container
    • B01D24/16—Upward filtration
    • 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
    • B01D24/38—Feed or discharge devices
    • B01D24/386—Feed or discharge devices internal recirculation
    • 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
    • B01D24/38—Feed or discharge devices
    • B01D24/40—Feed or discharge devices for feeding
    • 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
    • B01D24/38—Feed or discharge devices
    • B01D24/42—Feed or discharge devices for discharging filtrate
    • 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
    • B01D24/4631—Counter-current flushing, e.g. by air
    • B01D24/4652—Counter-current flushing, e.g. by air by using gasbumps

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a moving filter bed type filter which can recover pollutants efficiently and is simple to control operation. SOLUTION: An filter 30 has a filtration tank 1 having a filter medium 2 laminated downward in the inside, an overflow weir 18, and a raw water supply part 34, an air lift pipe 15 which extracts the filter medium 2 from the bottom of a filter bed 32 by compressed air and transfers it upward for washing and regeneration, a weir plate 18 which is immersed in the filtrate of a filtrate chamber 9 and forms a separation chamber 7 and an overflow fringe which is formed in the chamber 7, freely adjustable vertically, and placed below the overflow fringe of treated water, a washing water discharge part 5, a communication part 19, a takeoff removal chamber 8 which is arranged nearly concentrically on the periphery of the part 19 and communicates with the chamber 7, a washing column 31 which discharges pollutants separated from the washed and regenerated filter medium 2 which is introduced from the upper end of the pipe 15 into the chamber 7 by making them overflow from the weir plate 18 with washing water and supplies the filter medium 2 which is washed, regenerated, and precipitated from the part 19 to the upper surface of the filter bed 32, and a takeoff pipe for connecting the lower part of chamber 8 to a raw water supply source.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】この発明は、上水、下水、産
業廃水等のろ過装置の改良に関し、特に、この発明は、
比重１以上の粒状のろ材を用いて汚染したろ材を循環さ
せて洗浄再生して使用する方式のいわゆる移動ろ床式の
ろ過装置の改良に係るもので、ろ材の洗浄再生が容易で
且つ、洗浄分離した汚染物がろ液に混入せず汚染物の回
収率が高いろ過装置を提供せんとするものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a filtration device for clean water, sewage, industrial waste water, and the like.
It relates to the improvement of a so-called mobile filter type filtration device in which a contaminated filter medium is circulated using a granular filter medium having a specific gravity of 1 or more, and is washed and regenerated for use. An object of the present invention is to provide a filtration device in which the separated contaminants do not enter the filtrate and have a high contaminant recovery rate.

【０００２】[0002]

【従来の技術】従来、ろ床を構成するろ材が移動し、こ
のろ材を取り出して洗浄してろ床の上部へ戻す上向流移
動床式ろ過装置に関する技術は数多く知られている。例
えば、特公昭５６−５１８０８号公報には、汚れた砂を
輸送するのに圧縮空気で作動するエアリフトポンプの輸
送管を、ろ過槽内の中心軸線上に垂直に取り付け、洗浄
装置を前記輸送管の周囲に設けている。この洗浄装置
は、ろ過槽上部の処理水ゾーンに浸漬され、洗浄水の入
り口は前記処理水ゾーンに連通している。2. Description of the Related Art Conventionally, there have been known many techniques relating to an upflow moving bed type filtration apparatus in which a filter medium constituting a filter bed is moved, the filter medium is taken out, washed, and returned to an upper portion of the filter bed. For example, Japanese Patent Publication No. 56-51808 discloses that a transport pipe of an air lift pump operated by compressed air for transporting dirty sand is vertically mounted on a central axis in a filtration tank, and a cleaning device is provided in the transport pipe. Around. The cleaning device is immersed in a treatment water zone above a filtration tank, and an inlet of the cleaning water communicates with the treatment water zone.

【０００３】また、特公昭６４−１０２４６号公報に
は、汚れた砂を水エジェクターで輸送する移動床式ろ過
装置において、輸送管に連結された輸送水入り口と洗浄
排水排出口とを上部に有する分離装置をろ過槽の上方に
設け、下方から流入されて対向流となるろ液（洗浄水）
により前記分離装置で分離したろ材を二次洗浄する洗浄
装置を処理水ゾーンに浸漬して設け、該二次洗浄装置の
上部と、前記分離装置下部とを調節弁を介して連結した
装置が図示されている。また、ろ材の輸送水を洗浄室の
上部から取り出すようにしている。[0003] Japanese Patent Publication No. Sho 64-10246 discloses a moving bed type filtration device for transporting dirty sand by a water ejector, which has a transport water inlet and a washing drain outlet connected to a transport pipe at an upper portion. A separation device is provided above the filtration tank, and the filtrate (washing water) that flows in from below and becomes countercurrent.
A washing device for secondary washing of the filter medium separated by the separating device is provided by immersing it in the treatment water zone, and an apparatus in which an upper part of the secondary washing apparatus and a lower part of the separating apparatus are connected via a control valve is illustrated. Have been. Also, the water for transporting the filter medium is taken out from the upper part of the washing room.

【０００４】[0004]

【発明が解決しようとする課題】上述のような従来の移
動床式ろ過装置のうち、特公昭５６−５１８０８号公報
に記載されたエアリフトポンプを用いるものでは、輸送
管内を上昇した輸送排水は、対向流で上がってきた洗浄
排水と一緒になり同一の排水調整装置を越えてろ過槽外
に排出される。このため、砂輸送量が多くなれば、洗浄
槽内の水位が上がり、ろ過水水位との差がなくなり洗浄
用の対向流が少なくなり、汚染物がろ過水に混入してし
まう恐れが生じる。従って、揚砂量を多くする場合は、
その都度洗浄排水調整装置（堰、オリフィス等）を調節
しなければならない。このためには、洗浄排水調節装置
を常に最大負荷時にしておく必要があり、通常時には必
要以上の洗浄排水を排出しなければならず、洗浄排水を
多く使用し、ろ過効率が悪かった。Among the above-mentioned conventional moving bed type filtration apparatuses using an air lift pump described in Japanese Patent Publication No. 56-51808, the transport wastewater that has risen in the transport pipe is The wastewater is discharged together with the washing wastewater that has risen in the counterflow and out of the filtration tank through the same wastewater adjusting device. For this reason, if the amount of transported sand increases, the water level in the washing tank rises, the difference from the filtered water level disappears, the countercurrent for washing decreases, and contaminants may be mixed into the filtered water. Therefore, when increasing the sand load,
Each time the flushing drainage regulators (weirs, orifices, etc.) must be adjusted. For this purpose, it is necessary to always set the washing drainage control device at the maximum load, and it is necessary to discharge more washing drainage than necessary at normal times, so that a large amount of washing drainage is used and filtration efficiency is poor.

【０００５】また、特公昭６４−１０２４６号公報に記
載されたものでは、ろ材の洗浄部を二段階に設けて二次
洗浄部から汚染したろ材の輸送水を抜き取り、汚染した
ろ材を一次洗浄部に輸送している。そして、一次洗浄部
で洗ったろ材を二次洗浄部に戻して二次洗浄部内の上向
流（洗浄水）ですすいでろ材槽の上面に戻し、一次洗浄
部の洗浄汚濁水は系外に排出している。この場合、一次
洗浄部から二次洗浄部に至るまでの間において、汚染物
を剥離したろ材をすすぐために洗浄水に上向流を生じさ
せるには、二次洗浄部から抜きとる輸送水を系外に排出
する汚濁水よりも多くしなければならず、多量の輸送水
が必要となり、運転効率が悪かった。また、上向流が弱
いと洗浄分離した汚染物がろ材とともに沈降してろ液中
に混入する恐れがあるという難点があった。[0005] In Japanese Patent Publication No. Sho 64-10246, a filter medium washing section is provided in two stages, the contaminated filter medium transport water is extracted from the secondary washing section, and the contaminated filter medium is removed from the primary washing section. Transported to Then, the filter medium washed in the primary washing section is returned to the secondary washing section, rinsed with upward flow (washing water) in the secondary washing section, and returned to the upper surface of the filter medium tank. Discharging. In this case, in order to generate an upward flow in the washing water from the primary washing section to the secondary washing section in order to rinse the filter medium from which the contaminants have been separated, the transport water drawn from the secondary washing section is used. It had to be larger than the polluted water discharged to the outside, a large amount of transport water was required, and the operation efficiency was poor. Further, if the upward flow is weak, there is a problem that contaminants washed and separated may settle together with the filter medium and be mixed into the filtrate.

【０００６】[0006]

【課題を解決するための手段】この発明は、上述のよう
な課題を解決し得るものであって、ろ過槽内のろ床上方
のろ液中に洗浄塔を没入状態で設け、洗浄塔の内外にお
けるろ液のヘッド差を利用して洗浄塔中の汚濁した洗浄
水を系外に排出するようにして、処理水として排出され
る洗浄塔外のろ液中に汚染物が混入するのを完全に防止
するとともに、仮に汚染物が洗浄塔内を流下した場合で
あっても、洗浄塔内に流入するろ液中に誘導して原水内
に返送し、原水とともに再循環させるもので、高い効率
で汚染物を回収することができるようにしたものであ
る。SUMMARY OF THE INVENTION The present invention can solve the above-mentioned problems, and provides a washing tower in a state of being immersed in a filtrate above a filter bed in a filter tank. By using the head difference between the inside and outside of the filtrate, the polluted washing water in the washing tower is discharged to the outside of the system to prevent contaminants from being mixed into the filtrate outside the washing tower discharged as treated water. In addition to completely preventing contamination, even if contaminants flow down the washing tower, it is guided into the filtrate flowing into the washing tower, returned to the raw water, and recirculated with the raw water. The contaminants can be collected efficiently.

【０００７】すなわち、この発明に係る移動ろ床式ろ過
装置の要旨とするところは、ろ床を形成する比重１以上
の粒状のろ材が内部下方に積層され、前記ろ床上方のろ
液室上部に設けられた処理水溢流堰と、原水供給源に接
続された下方の原水供給部とを有し、該原水供給部から
供給された原水を、前記ろ床中を上昇させることによっ
てろ過し、前記処理水溢流堰から溢流させて処理水とし
て排出するろ過槽と、下端が前記ろ床の下層部で開口
し、下部及び中間部が圧力空気の供給源に接続され、前
記ろ材を、前記圧力空気によって前記ろ床の底部から引
き抜いて上方へ移送すると共に洗浄再生するエアリフト
管と、前記ろ液室のろ液中に没入状態で設けられ、前記
エアリフト管の上端が開口する上方の分離室と、該分離
室に設けられ上下に調節自在で且つ前記処理水の溢流縁
よりも下位の溢流縁を形成する堰板と、該堰板から溢流
する洗浄水を前記ろ過槽外へ排出する洗浄水排出部と、
前記分離室と前記ろ液室とを連通し該ろ液室のろ液が流
入する下方の連通部と、該連通部の外周に該連通部と略
同心状に配設されて前記分離室と連通する取出室とを有
し、前記エアリフト管の上端から前記分離室へ流入する
前記洗浄再生されたろ材と該ろ材から分離した汚染物の
うち、前記汚染物を、前記エアリフト管によって移送さ
れた洗浄水と共に前記堰板から溢流して前記洗浄水排出
部から排出し、前記洗浄再生されて沈降するろ材を、前
記連通部から前記ろ床の上面へ供給する洗浄塔と、前記
洗浄塔の取出室の下部に接続された一端と、前記原水供
給源に接続された他端とを有し、前記連通部に流入した
ろ液を前記原水供給源へ循環供給する取出管とを備えた
ことにある。[0007] That is, the gist of the moving filter type filtration device according to the present invention is that a granular filter material having a specific gravity of 1 or more forming a filter bed is laminated inside and below, and an upper part of a filtrate chamber above the filter bed is provided. And a raw water supply section connected to a raw water supply source.The raw water supplied from the raw water supply section is filtered by ascending in the filter bed. A filtration tank that overflows from the treated water overflow weir and is discharged as treated water; a lower end is opened in a lower part of the filter bed; a lower part and an intermediate part are connected to a supply source of compressed air; An air lift pipe that is pulled out from the bottom of the filter bed by the pressurized air, transferred upward, and is washed and regenerated; and an air lift pipe provided in a state of being immersed in the filtrate in the filtrate chamber, the upper end of which the upper end of the air lift pipe opens. Separation chamber and up and down provided in the separation chamber A weir plate forming the lower overflow rim than the overflow edge sections freely in and the treated water, and the wash water discharge portion for discharging the cleaning water overflowing from the weir plate to the filtration tank outside
A lower communication portion that communicates the separation chamber with the filtrate chamber and through which the filtrate of the filtrate chamber flows, and the separation chamber that is disposed substantially concentrically with the communication portion on the outer periphery of the communication portion; A discharge chamber having communication with the filter medium, and the contaminant among the contaminants separated from the filter medium and the regenerated filter medium flowing into the separation chamber from the upper end of the air lift pipe is transferred by the air lift pipe. A washing tower that supplies the filter medium that overflows from the weir plate together with the washing water and is discharged from the washing water discharge section, and that is washed and regenerated and settles from the communication section to the upper surface of the filter bed; and taking out the washing tower. An outlet pipe having one end connected to the lower part of the chamber and the other end connected to the raw water supply source, and for circulating the filtrate flowing into the communication section to the raw water supply source; is there.

【０００８】また、取出管の他端は、原水槽が近傍に設
けてあるときには、原水槽に直接接続すれば良く、原水
槽がろ過槽よりも離れた位置にあるときは、原水の供給
管に接続すれば良い。取出管の他端を供給管に接続する
場合は、原水の供給ポンプの供給圧を利用して、前述の
エアリフト管への圧縮空気に対抗して連通部に流入した
ろ液を引き抜くため、ろ過槽への原水の供給ポンプの下
流側にエジェクターを介して接続する。[0008] The other end of the take-out pipe may be connected directly to the raw water tank when the raw water tank is provided in the vicinity. When the raw water tank is located at a distance from the filtration tank, the other end of the raw water supply pipe may be provided. Just connect to it. When the other end of the take-out pipe is connected to the supply pipe, use the supply pressure of the raw water supply pump to pull out the filtrate that has flowed into the communication section against the compressed air to the air lift pipe described above. Connect to the downstream side of the feed pump of raw water to the tank via an ejector.

【０００９】また、ろ過槽への原水供給部は、ろ材を撹
乱することなく原水を自然且つ均等に流入させるため、
ループ状のヘッダー管に数本の流入管を立設し、その上
端開口の上方にループ状の分配傘を設けたものとするこ
ともできる。In addition, the raw water supply section to the filtration tank allows the raw water to flow naturally and uniformly without disturbing the filter medium.
Several inflow pipes may be erected on the loop-shaped header pipe, and a loop-shaped distribution umbrella may be provided above the upper end opening.

【００１０】この発明に係る装置は、上述のように構成
してあるので、上記ろ床の下部に供給された原水は、ろ
床中を上昇する間に夾雑物（汚染物）がろ材に捕捉さ
れ、そのろ液（処理水）は、ろ液室上部の処理水溢流堰
から溢流して槽外へ排出される。これと同時に、エアリ
フト管に圧力空気を送ることによって、ろ床の底部の汚
染したろ材が引き抜かれ、積層状のろ材が徐々に上方か
ら下方に移動する。そして、ろ床から引抜かれたろ材
は、ろ過槽下部の原水（洗浄水）と共にエアリフト管内
を撹拌されながら上方の洗浄塔の分離室まで移送され
る。[0010] Since the apparatus according to the present invention is configured as described above, the raw water supplied to the lower portion of the filter bed captures impurities (contaminants) in the filter medium while rising in the filter bed. The filtrate (treated water) overflows from the treated water overflow weir above the filtrate chamber and is discharged out of the tank. At the same time, by sending pressurized air to the air lift pipe, the contaminated filter medium at the bottom of the filter bed is pulled out, and the laminated filter medium gradually moves from above to below. Then, the filter medium withdrawn from the filter bed is transported to the separation chamber of the upper washing tower while being stirred in the air lift tube together with the raw water (wash water) at the lower part of the filter tank.

【００１１】エアリフト管内において、ろ材に付着した
汚染物は、移送中に撹拌されることによってろ材から剥
離する。洗浄塔の分離室では、剥離した軽い汚染物が浮
上し、重いろ材が沈降する。そして、浮上した汚染物
は、分離室の上部の堰板から洗浄水の一部と共に溢流
し、洗浄水排出部から系外に排出される。一方、洗浄さ
れたろ材は、沈降して連通部を通りろ床の上面に供給さ
れる。連通部を沈降するろ材は、ろ床上方から流入して
上昇するろ液内を潜ってすすがれる。[0011] In the air lift tube, contaminants adhering to the filter medium are separated from the filter medium by being stirred during the transfer. In the separation chamber of the washing tower, the separated light contaminants float and heavy filter media settles. Then, the contaminants that have floated overflow from the weir plate at the top of the separation chamber together with part of the washing water, and are discharged out of the system from the washing water discharge unit. On the other hand, the washed filter medium is settled, passes through the communicating portion, and is supplied to the upper surface of the filter bed. The filter medium that settles in the communication part flows in from above the filter bed and dips in the ascending filtrate to be rinsed.

【００１２】この洗浄塔内におけるろ液の上昇流は、ろ
液室上部から溢流する処理水のの上面と、分離室の堰板
から溢流する洗浄水の上面とのヘッド差により発生する
ものであり、洗浄水の溢流縁が処理水の溢流縁よりも下
位になるように堰板が設けられているので、この上昇流
によって汚染物が連通部から流出してろ液に混入するこ
とを完全に防止できる。また、この両者のヘッド差は、
分離室上部の堰板を上下することによって簡単に調節で
き、これにより、洗浄塔内の上昇流の流量を調節でき
る。従って、堰板のみを上下するという簡単な操作によ
って、ろ材の汚染の度合い（汚染負荷）に応じた十分な
すすぎ具合を得ることができる。The ascending flow of the filtrate in the washing tower is caused by a head difference between the upper surface of the treated water overflowing from the upper part of the filtrate chamber and the upper surface of the washing water overflowing from the weir plate of the separation chamber. Since the weir plate is provided so that the overflow edge of the washing water is lower than the overflow edge of the treated water, the contaminant flows out of the communication part due to the upward flow and is mixed into the filtrate. Can be completely prevented. The difference between the two heads is
It can be easily adjusted by raising and lowering the weir plate at the upper part of the separation chamber, whereby the flow rate of the ascending flow in the washing tower can be adjusted. Therefore, by a simple operation of raising and lowering only the weir plate, a sufficient rinsing degree corresponding to the degree of contamination (contamination load) of the filter medium can be obtained.

【００１３】一方、洗浄塔内を上昇するろ液の一部は、
洗浄塔の下部に設けられた取出室に流入し、取出管を介
して循環水として原水へと戻されるが、この取出管は、
取出室の下部に接続されているので、軽い汚染物が循環
水へ混入するのを最小限に抑えることができる。また、
仮に、汚染物が混入したとしても、この循環水は原水と
合流して再度ろ過されるので、原水から固形物（汚染
物）を回収する面からみれば、その回収度を高めること
が可能となる。On the other hand, part of the filtrate rising in the washing tower is:
It flows into an extraction chamber provided at the lower part of the washing tower, and is returned to the raw water as circulating water via an extraction pipe.
Since it is connected to the lower part of the discharge chamber, it is possible to minimize the entry of light contaminants into the circulating water. Also,
Even if contaminants are contaminated, the circulating water merges with the raw water and is filtered again. From the viewpoint of collecting solids (contaminants) from the raw water, it is possible to increase the degree of recovery. Become.

【００１４】また、洗浄塔内を上昇するろ液の流量、エ
アリフト管に流入する原水の流量、及び循環水の流量
は、ろ液室上部から溢流する処理水と分離室の堰板から
溢流する洗浄水とのヘッド差に起因して変動し、この両
者のヘッド差は、分離室上部の堰板を上下することによ
って簡単に変更させることができる。従って、ろ材の汚
染の度合い（汚染負荷）が変動した場合には、堰板を上
下することによってエアリフト管に流入する原水の流量
を増減し、ろ材の引き抜き量を増減させて、ろ材の洗浄
の頻度を増減させればよいので、係る制御を容易に行う
ことができる。The flow rate of the filtrate rising in the washing tower, the flow rate of the raw water flowing into the air lift pipe, and the flow rate of the circulating water are determined by the flow rate of the treated water overflowing from the upper part of the filtrate chamber and the dam plate of the separation chamber. It fluctuates due to the head difference from the flowing washing water, and the head difference between the two can be easily changed by raising and lowering the weir plate above the separation chamber. Therefore, when the degree of contamination of the filter medium (contamination load) fluctuates, the flow rate of the raw water flowing into the air lift pipe is increased or decreased by moving the weir plate up and down, and the amount of extraction of the filter medium is increased or decreased. Since the frequency may be increased or decreased, such control can be easily performed.

【００１５】また、ろ材を循環させるに当って、エアリ
フト管には下部及び中間部の双方から高圧空気が流入す
るので、ろ床が厚い場合であっても円滑にろ材を揚送す
ることができる。例えば、運転を休止していて始動する
場合には、エアリフト管内の下部から上部までろ材が詰
っていて、これを下部からかつ一挙に揚送することは困
難であるが、これを中間部と下部とから二段階に揚送す
れば円滑に揚送することができる。In circulating the filter medium, high-pressure air flows into the air lift pipe from both the lower part and the intermediate part, so that the filter medium can be smoothly pumped even when the filter bed is thick. . For example, in the case of starting the machine while the operation is suspended, the filter medium is clogged from the lower part to the upper part in the air lift pipe, and it is difficult to lift the filter medium from the lower part and at a time. If it is carried out in two stages from the above, it can be carried out smoothly.

【００１６】さらに、取出室からの循環水を循環させる
に当って、原水槽がろ過槽の近傍にある場合には、循環
水の取出管をろ過槽直結すれば良いが、原水槽がろ過槽
から離れた場所にある場合には、循環水の取出管をろ過
槽への原水の供給管に設けたエジェクター（引込器）に
接続すれば至便である。すなわち、原水槽がろ過槽から
離れた位置にある場合、その距離や地形によって複雑な
長い配管を必要とするが、原水供給管にエジェクターを
設けて、このエジェクター取出管を接続することによっ
て、原水槽の近傍の原水供給管に容易に循環路を形成す
ることができる。Further, in circulating the circulating water from the extraction chamber, if the raw water tank is located near the filtration tank, the circulating water extraction pipe may be directly connected to the filtration tank. If it is located away from the circulating water, it is convenient to connect the outlet pipe for circulating water to the ejector (retractor) provided in the feed pipe for raw water to the filtration tank. In other words, when the raw water tank is located far from the filtration tank, complicated long pipes are required depending on the distance and topography.By installing an ejector in the raw water supply pipe and connecting this ejector outlet pipe, A circulation path can be easily formed in the raw water supply pipe near the water tank.

【００１７】また、ろ床の下部に供給される原水を、ル
ープ状のヘッダー管から数本の流入管からループ状の分
配傘を介して供給するようにすれば、ろ床を撹乱させる
ことなく原水を均等に供給することができ、清澄なろ液
を得ることができる。また、ループ状の分配傘の上面
は、流下方向が分散するように洗浄再生されたろ材を案
内するので、ろ材が部分的に停滞するのを防止すること
ができる。Further, if the raw water supplied to the lower part of the filter bed is supplied from a loop-shaped header pipe to several inflow pipes via a loop-shaped distribution umbrella, the filter bed is not disturbed. Raw water can be supplied evenly, and a clear filtrate can be obtained. In addition, the upper surface of the loop-shaped distribution umbrella guides the filter medium that has been washed and regenerated so that the flowing direction is dispersed, so that the filter medium can be prevented from being partially stagnated.

【００１８】[0018]

【発明の実施の形態】以下、図面に基づいてこの発明の
一実施の形態に係る移動ろ床式ろ過装置を具体的に説明
する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a moving filter type filtration apparatus according to an embodiment of the present invention will be specifically described with reference to the drawings.

【００１９】図１は一実施の形態に係る移動ろ床式ろ過
装置を模式的に表した縦断面図、図２は図１の一部を破
断して示す斜面図、図３は図１のろ過装置を用いた汚水
処理のフローシートである。FIG. 1 is a longitudinal sectional view schematically showing a moving filter type filtration apparatus according to an embodiment, FIG. 2 is a partially cutaway perspective view of FIG. 1, and FIG. It is a flow sheet of sewage treatment using a filtration device.

【００２０】図１及び図２に示すように、このろ過装置
３０は、ろ過槽１とエアリフト管１５と洗浄塔３１と取
出管１０とを備えている。As shown in FIGS. 1 and 2, the filtration device 30 includes a filtration tank 1, an air lift tube 15, a washing tower 31, and an extraction tube 10.

【００２１】ろ過槽１は下部が先細りする中空円筒状に
形成され、ろ過槽１の内部下方には、ろ床３２を形成す
る比重１以上の粒状のろ材２が積層されている。ろ床３
２上方のろ過槽１の内部空間はろ液室９を構成し、ろ液
室９の上部には、ろ液（処理水）が溢流する処理水溢流
堰３８と、溢流した処理水をろ過槽１外へ排出する処理
水排出部４が設けられている。ろ過槽１の下方には、原
水供給源３３（図３参照）に接続された原水供給部３４
が設けられ、この原水供給部３４から処理すべき原水が
ろ過槽１内に供給される。汚染物を含有する原水は、原
水供給部３４から供給されてろ床３２中を上昇し、ろ材
１が汚染物を捕捉することによってろ過されて、処理水
として処理水溢流堰３８から溢流し、処理水排出部４か
ら排出される。The filtration tank 1 is formed in a hollow cylindrical shape having a tapered lower portion, and a granular filter medium 2 having a specific gravity of 1 or more forming a filter bed 32 is laminated below the inside of the filtration tank 1. Filter bed 3
The internal space of the upper filtration tank 2 constitutes a filtrate chamber 9, and a treated water overflow weir 38 in which a filtrate (treated water) overflows, and a treated water overflowing in the upper part of the filtrate chamber 9. A treated water discharge part 4 for discharging the water to the outside of the filtration tank 1 is provided. Below the filtration tank 1, a raw water supply unit 34 connected to a raw water supply source 33 (see FIG. 3) is provided.
The raw water to be treated is supplied from the raw water supply unit 34 into the filtration tank 1. The raw water containing the contaminants is supplied from the raw water supply unit 34, rises in the filter bed 32, is filtered by the filter medium 1 capturing the contaminants, and overflows from the treated water overflow weir 38 as treated water. It is discharged from the treated water discharge unit 4.

【００２２】原水供給部３４は、ループ状のヘッダー管
３と、複数本の流入管３５と、ループ状の分配傘３６と
を備えている。ヘッダー管３は、ろ過槽１の下方外部に
設けられ、原水供給源３３（図３参照）に接続されてい
る。各流入管３５は、ヘッダー管３に立設され、ろ過槽
１内に挿入されてろ床３２の下部に延びている。分配傘
３６は、流入管３５の上端開口の上方を覆うように設け
られ、流入管３５から上方へ流出する原水は、分配傘３
６に当接し、ろ床３２内へ均等に配分される。The raw water supply unit 34 includes a loop-shaped header pipe 3, a plurality of inflow pipes 35, and a loop-shaped distribution umbrella 36. The header tube 3 is provided below and outside the filtration tank 1 and is connected to a raw water supply source 33 (see FIG. 3). Each inflow pipe 35 is erected on the header pipe 3, inserted into the filtration tank 1, and extends below the filter bed 32. The distribution umbrella 36 is provided so as to cover above the upper end opening of the inflow pipe 35, and the raw water flowing upward from the inflow pipe 35 is supplied to the distribution umbrella 3.
6 and is evenly distributed in the filter bed 32.

【００２３】ろ過槽１の内部には、先端部が分配傘３６
の上部に達するように、ろ過抵抗測定管２２が挿入され
ている。このろ過抵抗測定管２２は、ろ材２が汚染物を
捕捉することによって生じるろ床３２のろ過圧損を検出
するもので、係るろ過圧損を検出することによって、ろ
材２の洗浄状態（汚染状態）を確認することができる。Inside the filtration tank 1, a tip is provided with a distributing umbrella 36.
A filtration resistance measuring tube 22 is inserted so as to reach the upper part of the filter. The filtration resistance measurement tube 22 detects a filtration pressure loss of the filter bed 32 caused by the filter medium 2 capturing contaminants. By detecting the filtration pressure loss, the cleaning state (contamination state) of the filtration medium 2 is determined. You can check.

【００２４】エアリフト管１５は、ろ過槽１内のほぼ中
央に立設された案内管３７の内部を挿通するように設け
られている。エアリフト管１５の下端は、ろ床３２の下
層部となるろ過槽１の底部のピット１６内に臨んで開口
している。エアリフト管１５の下部及び中間部は、エア
供給管１７を介して圧力空気の供給源としてのエアコン
プレッサ３８に接続され（図３参照）、エアリフト管１
５の内部を圧力空気が上昇する。図１では、構造を分り
易くするため、ろ過槽１の外側にエア供給管１７を示し
てあるが、実際には、図２に示すように、エアリフト管
１５と案内管３７との間に形成される間隙に、２本のエ
ア供給管１７が上部から挿入されており、その一方はエ
アリフト管１５の下部で、他方はエアリフト管１５の中
間部でそれぞれ開口している。係る圧力空気によって、
ろ床３２底部の汚染したろ材２が引き抜かれ、積層状の
ろ材２が徐々に上方から下方に移動する。そして、ろ床
３２から引抜かれたろ材２は、ろ過槽１下部の原水（洗
浄水）と共にエアリフト管１５内を撹拌されながら上方
に移送される。The air lift pipe 15 is provided so as to pass through the inside of a guide pipe 37 erected substantially at the center of the filtration tank 1. The lower end of the air lift pipe 15 is opened facing the inside of the pit 16 at the bottom of the filtration tank 1 which is the lower layer of the filter bed 32. The lower and middle portions of the air lift pipe 15 are connected to an air compressor 38 as a supply source of compressed air via the air supply pipe 17 (see FIG. 3).
The pressure air rises inside 5. In FIG. 1, the air supply pipe 17 is shown outside the filtration tank 1 for easy understanding of the structure, but actually, as shown in FIG. 2, the air supply pipe 17 is formed between the air lift pipe 15 and the guide pipe 37. Two air supply pipes 17 are inserted from above into the gap, one of which is open at a lower part of the air lift pipe 15 and the other is open at an intermediate part of the air lift pipe 15. By such pressure air,
The contaminated filter medium 2 at the bottom of the filter bed 32 is pulled out, and the laminated filter medium 2 gradually moves downward from above. Then, the filter medium 2 withdrawn from the filter bed 32 is transported upward while being stirred in the air lift pipe 15 together with the raw water (wash water) at the lower part of the filter tank 1.

【００２５】洗浄塔３１は、分離室７と堰板１８と洗浄
水排出部５と連通部１９と取出室８とを備え、ろ液室９
のろ液中に没入状態で設けられている。The washing tower 31 includes a separation chamber 7, a weir plate 18, a washing water discharge section 5, a communication section 19, and a discharge chamber 8, and a filtrate chamber 9
The filter is immersed in the filtrate.

【００２６】エアリフト管１５は、洗浄塔３１の内部を
挿通して設けられ、エアリフト管１５の上端は、分離室
７の上部で開口している。堰板１８及び洗浄水排出部５
は、分離室７の上部に設けられている。堰板１８は、上
下移動自在で、且つ処理水溢流堰３８からの処理水の溢
流縁よりも下位の溢流縁を形成する高さに配設されてい
る。すなわち、洗浄水の上面Ｈ１は、処理水の上面Ｈよ
りも常時低位となるように設定され、両溢流縁間には常
にヘッド差（Ｈ−Ｈ１）が生じている。また、係るヘッ
ド差の大きさは、堰板１８を上下させることによって調
節可能となっている。The air lift pipe 15 is provided so as to pass through the inside of the washing tower 31, and the upper end of the air lift pipe 15 is opened at the upper part of the separation chamber 7. Weir plate 18 and washing water discharge unit 5
Is provided above the separation chamber 7. The weir plate 18 is vertically movable and is disposed at a height that forms an overflow edge lower than the overflow edge of the treated water from the treated water overflow weir 38. That is, the upper surface H1 of the cleaning water is set to be always lower than the upper surface H of the treated water, and a head difference (H-H1) always occurs between both overflow edges. The magnitude of the head difference can be adjusted by moving the dam plate 18 up and down.

【００２７】分離室７では、エアリフト管１５の上端か
らろ材２を含む洗浄水が流下し、係る洗浄水中におい
て、剥離した軽い汚染物が浮上し、重いろ材２が沈降す
る。そして、浮上した汚染物は、分離室７の上部の堰板
１８から洗浄水の一部と共に溢流し、洗浄水排出部５か
ら系外に排出される。In the separation chamber 7, the washing water containing the filter medium 2 flows down from the upper end of the air lift pipe 15, and in the wash water, the separated light contaminants float and the heavy filter medium 2 sinks. Then, the contaminants that have floated overflow from the weir plate 18 at the upper part of the separation chamber 7 together with a part of the cleaning water, and are discharged from the cleaning water discharge unit 5 to the outside of the system.

【００２８】連通部１９は、ドーナツ状断面を有する筒
状に形成され、案内管３８と略同心状に分離室７の下方
に配設されて、分離室７とろ液室９とを連通する。連通
部１９では、分離室７を沈降したろ材２が下方へ移動す
ると共に、ろ液室９のろ液が流入して上昇する。連通部
１９を沈降したろ材２は、ろ液室９内に流下してろ床３
２の上面に供給される。分離室７の下端部と連通部１９
の上端部及び中間部とには、ろ材２の流下方向を案内す
る流下案内板２０が設けられ、連通部１９の下方のろ液
室９内には、流下するろ材２を均等に分配するための傘
状の分配板２１が設けられている。The communicating portion 19 is formed in a cylindrical shape having a donut-shaped cross section, is disposed substantially concentrically with the guide tube 38 below the separation chamber 7, and communicates the separation chamber 7 with the filtrate chamber 9. In the communication part 19, the filter medium 2 that has settled in the separation chamber 7 moves downward, and the filtrate in the filtrate chamber 9 flows in and rises. The filter medium 2 that has settled down the communication part 19 flows down into the filtrate chamber 9 and flows through the filter bed 3.
2 is supplied to the upper surface. Communication part 19 with the lower end of the separation chamber 7
A flow guide plate 20 for guiding the filter medium 2 in the flow direction is provided at an upper end portion and an intermediate portion of the filter medium 2. In the filtrate chamber 9 below the communication portion 19, the filter medium 2 flowing down is evenly distributed. Umbrella-shaped distribution plate 21 is provided.

【００２９】取出室８は、ドーナツ状断面を有する有底
筒状に形成され、連通部１９の外周に連通部１９と略同
心状に配設されてている。取出室８の上部は、分離室７
の下端部及び連通部１９の上端部と連通している。The take-out chamber 8 is formed in a bottomed cylindrical shape having a donut-shaped cross section, and is disposed substantially concentrically with the communication portion 19 on the outer periphery of the communication portion 19. The upper part of the extraction chamber 8 is
And the upper end of the communication portion 19.

【００３０】取出管１０の一端は、取出室８の下部に接
続され、他端は、原水供給源３３（図３参照）に接続さ
れている。ろ液室９から連通部１９に流入したろ液の一
部（連通部１９に流入したろ液のうち堰板１８からの溢
流分を除いた分）は、取出管１０を介して原水供給源３
３へ循環供給される。取出管１０の中間部には、ろ液の
循環流量を検出するための流量計１３と、ろ液の循環流
量を調節するためのバルブ４１とが設けられている。One end of the discharge pipe 10 is connected to a lower part of the discharge chamber 8, and the other end is connected to a raw water supply source 33 (see FIG. 3). A part of the filtrate flowing from the filtrate chamber 9 into the communication portion 19 (the portion of the filtrate flowing into the communication portion 19 excluding the overflow from the weir plate 18) is supplied to the raw water through the extraction pipe 10. Source 3
3 is circulated. A flow meter 13 for detecting the circulating flow rate of the filtrate and a valve 41 for adjusting the circulating flow rate of the filtrate are provided at an intermediate portion of the extraction pipe 10.

【００３１】図３に示すように、原水供給源３３は、原
水槽３９と、原水槽１１と原水供給部３４のヘッダー管
３とを接続する供給管１１と、供給管１１の途中に設け
られた供給ポンプ４０とを備えている。原水供給部３４
のヘッダー管３との接続端部には、原水の供給圧を検出
する圧力計１４が設けられている。As shown in FIG. 3, the raw water supply source 33 is provided in the raw water tank 39, the supply pipe 11 connecting the raw water tank 11 and the header pipe 3 of the raw water supply unit 34, and in the middle of the supply pipe 11. And a supply pump 40. Raw water supply unit 34
A pressure gauge 14 for detecting the supply pressure of the raw water is provided at the end of the connection with the header pipe 3.

【００３２】取出管１０の他端は、供給管１１の供給ポ
ンプ４０よりも下流側に、図４に示すようなエジェクタ
ー１２を介して接続されている。エジェクター１２は、
通過原水の引き込み負圧を利用して、取出室８の下部か
ら輸送水をエアリフト管１５の空気圧の逆圧に抗して引
抜くためのものである。The other end of the discharge pipe 10 is connected to the supply pipe 11 downstream of the supply pump 40 via an ejector 12 as shown in FIG. The ejector 12
The transport water is drawn out from the lower part of the take-out chamber 8 against the reverse pressure of the air pressure of the air lift pipe 15 by utilizing the negative pressure of the passing raw water.

【００３３】また、原水槽３９がろ過槽１の近傍に設け
られている場合には、取出管１０の他端を、原水槽３９
に直接接続することもできる（図３中の配管４４参
照）。When the raw water tank 39 is provided near the filtration tank 1, the other end of the extraction pipe 10 is connected to the raw water tank 39.
Can also be directly connected to the air conditioner (see piping 44 in FIG. 3).

【００３４】このように構成されたろ過装置３０によれ
ば、夾雑物（汚染物）を含む原水は、原水供給部３４の
流入管３５からろ過槽１内に供給され、ろ床３２中（積
層されたろ材２の間）を上昇する。汚染物は、原水がろ
床３２中を上昇する間にろ材２に捕捉され、そのろ液
（処理水）は、ろ過槽１上部のろ液室９に溜り、ろ液室
９上部の処理水溢流堰８から溢流して処理水排出部４か
ら系外に取出される。According to the filtration device 30 configured as described above, the raw water containing impurities (contaminants) is supplied into the filtration tank 1 from the inflow pipe 35 of the raw water supply unit 34, and is supplied to the filtration bed 32 (stacked). Between the filtered media 2). The contaminants are trapped in the filter medium 2 while the raw water rises in the filter bed 32, and the filtrate (processed water) accumulates in the filtrate chamber 9 above the filter tank 1 and the treated water above the filtrate chamber 9. The water overflows from the overflow weir 8 and is taken out of the system from the treated water discharge unit 4.

【００３５】一方、エアリフト管１５に圧力空気を送る
ことによって、ろ床３２底部の汚染したろ材２は、エア
リフト管１５内に引き抜かれ、積層状のろ材２が徐々に
上方から下方に移動する。そして、ろ床３２から引き抜
かれたろ材２は、ろ過槽１底部の原水（洗浄水）と共に
エアリフト管１５内を攪拌されながら上方の洗浄塔３１
の分離室７まで移送される。On the other hand, by sending pressurized air to the air lift pipe 15, the contaminated filter medium 2 at the bottom of the filter bed 32 is pulled out into the air lift pipe 15, and the laminated filter medium 2 gradually moves downward from above. Then, the filter medium 2 pulled out from the filter bed 32 is mixed with the raw water (wash water) at the bottom of the filter tank 1 while stirring the inside of the air lift pipe 15 to wash the upper washing tower 31.
To the separation chamber 7.

【００３６】ここで、ろ床３２の底部から引抜いたろ材
２には原液中の夾雑物が付着しているが、この夾雑物
は、ろ材２が移送中に攪拌されることによって剥離す
る。そして、エアリフト管１５の上端から分離室７内に
吐出した後、軽い夾雑物は浮上して堰板１８から溢流
し、洗浄水排出部５から洗浄水とともに系外に取出され
る。また、汚染物が剥離された洗浄済みの重いろ材２
は、沈降して連通部１９を通り、分配板２１を経てろ床
３２の上面に供給される。Here, impurities in the undiluted solution adhere to the filter medium 2 pulled out from the bottom of the filter bed 32, and these impurities are peeled off by the stirring of the filter medium 2 during transfer. Then, after being discharged from the upper end of the air lift pipe 15 into the separation chamber 7, the light contaminants float and overflow from the weir plate 18, and are taken out of the system together with the washing water from the washing water discharge unit 5. Also, the washed heavy filter medium 2 from which contaminants have been removed
Is settled, passes through the communication portion 19, and is supplied to the upper surface of the filter bed 32 via the distribution plate 21.

【００３７】分離室７内の水量は、洗浄水排出部５から
洗浄水として排出した分だけ減少するが、この減少分に
対しては、ろ液室９のろ床３２上方のろ液が連通部１９
の下部から流入し補充される。このため、分離室７内に
は、ろ液の上昇流が発生するが、夾雑物が剥離されて比
重が重くなった洗浄済みのろ材２は、この上昇流中を沈
降し、このろ液内を潜ってすすがれる。一方、剥離され
た汚染物は、比重が軽いため、上昇流に逆らって連通部
１９を沈降することがなく、ろ液室９内に入ることはな
い。The amount of water in the separation chamber 7 is reduced by the amount discharged as the washing water from the washing water discharge section 5, and the filtrate above the filter bed 32 of the filtrate chamber 9 communicates with this reduced amount. Part 19
It flows in from the lower part of the tank and is replenished. For this reason, an ascending flow of the filtrate is generated in the separation chamber 7, but the washed filter medium 2 having the specific gravity increased due to the separation of the contaminants settles down in the ascending flow, and Dive and rinse. On the other hand, since the separated contaminants have a low specific gravity, they do not settle in the communicating portion 19 against the upward flow and do not enter the filtrate chamber 9.

【００３８】また、洗浄塔３１内におけるろ液の上昇流
は、ろ液室９上部の処理水溢流堰３８から溢流する処理
水の上面Ｈと、分離室７上部の堰板１８から溢流する洗
浄水の上面Ｈ１とのヘッド差（Ｈ−Ｈ１）により発生す
るものであり、洗浄水の溢流縁Ｈ１が処理水の溢流縁Ｈ
よりも下位になるように堰板１８が設けられているの
で、この上昇流によって汚染物が連通部１９から流出し
てろ液に混入することを完全に防止できる。The upward flow of the filtrate in the washing tower 31 overflows from the upper surface H of the treated water overflowing from the treated water overflow weir 38 above the filtrate chamber 9 and from the weir plate 18 above the separation chamber 7. This is caused by a head difference (H-H1) from the upper surface H1 of the flowing washing water, and the overflowing edge H1 of the washing water becomes the overflowing edge H of the treated water.
Since the weir plate 18 is provided at a lower level than above, it is possible to completely prevent the contaminant from flowing out of the communication portion 19 and being mixed into the filtrate due to the upward flow.

【００３９】また、この両者のヘッド差は、分離室７上
部の堰板１８を上下することによって簡単に変更でき、
係るヘッド差の変更により、洗浄塔３１内を上昇するろ
液の流量、エアリフト管１５に流入する原水の流量、及
び循環水の流量を増減することができる。すなわち、エ
アリフト管１５に流入する原水の流量を増減させれば、
これに伴って洗浄塔３１内を上昇するろ液の流量も増減
するため、ろ材２の汚染の度合い（汚染負荷）が変動し
た場合の制御を容易に行うことができる。例えば、ろ材
２の汚染負荷が上昇し、ろ床３２中のろ材２が目詰りを
生じて、圧損計２２によってろ床３２内の圧力上昇が検
出されたときには、堰板１８を下げることによってヘッ
ド差を増大させる。これにより、堰板１８から溢流する
洗浄水の流量が増大すると共に、エアリフト管１５に流
入する原水の流量が増大し、ろ材２の引抜き量が増加す
るので、ろ材２の洗浄の頻度が高くなり、ろ床３２にお
けるろ材２の目詰まりを快復させて、安定したろ過運転
を行うことができる。また、ろ材２の汚染負荷が上昇
し、ろ材２の引き抜き量を増大させた場合には、洗浄塔
３１内を上昇するろ液の流量も同時に増大するので、ろ
材２の汚染負荷の上昇及び引き抜き量の増大に応じた十
分な強さの上昇流が得られ、汚染負荷に応じた十分なす
すぎ具合を得ることができる。なお、他の調整例とし
て、取出管１０に設けたバルブ４１の開度を調節し、循
環水の流量を調節することも可能であり、係る調整によ
っても同様の安定したろ過運転を行うことができる。The difference between the two heads can be easily changed by raising and lowering the weir plate 18 in the upper part of the separation chamber 7.
By changing the head difference, the flow rate of the filtrate rising in the washing tower 31, the flow rate of the raw water flowing into the air lift pipe 15, and the flow rate of the circulating water can be increased or decreased. That is, if the flow rate of raw water flowing into the air lift pipe 15 is increased or decreased,
Accordingly, the flow rate of the filtrate ascending in the washing tower 31 also increases and decreases, so that control when the degree of contamination of the filter medium 2 (contamination load) fluctuates can be easily performed. For example, when the contamination load of the filter medium 2 rises, the filter medium 2 in the filter bed 32 is clogged, and when the pressure drop in the filter bed 32 is detected by the pressure drop gauge 22, the head 18 is lowered to lower the head. Increase the difference. As a result, the flow rate of the washing water overflowing from the weir plate 18 increases, and the flow rate of the raw water flowing into the air lift pipe 15 increases, so that the amount of extraction of the filter medium 2 increases. Thus, the clogging of the filter medium 2 in the filter bed 32 is restored, and a stable filtration operation can be performed. In addition, when the contamination load of the filter medium 2 increases and the amount of extraction of the filter medium 2 is increased, the flow rate of the filtrate rising in the washing tower 31 is also increased, so that the contamination load of the filter medium 2 is increased and the extraction is performed. An ascending flow of sufficient strength is obtained according to the increase in the amount, and a sufficient rinsing degree according to the contamination load can be obtained. In addition, as another adjustment example, it is also possible to adjust the opening degree of the valve 41 provided in the extraction pipe 10 and adjust the flow rate of the circulating water, and the same stable filtration operation can be performed by such adjustment. it can.

【００４０】一方、洗浄塔３１内を上昇するろ液の一部
は、取出室８に流入する。取出室８に流入したろ液は、
エジェクター１２の作用によって、下方の循環水取出部
６から引き抜かれ、が取出管１０を介して循環水として
原水へと戻される。このため、取出室８では下降流が生
じるが、この取出室８が分離室７下端の下方外側に設け
られていること、及び循環水取出部６が取出室８の下部
に設けられていることから、軽い汚染物が循環水へ混入
するのを最小限に抑えることができる。また、仮に、循
環水へ汚染物が混入したとしても、この循環水は原水と
合流して再度ろ過されるので、原水から固形物（汚染
物）を回収する面からみれば、その回収度を高めること
が可能となる。On the other hand, a part of the filtrate rising inside the washing tower 31 flows into the discharge chamber 8. The filtrate flowing into the discharge chamber 8 is
By the action of the ejector 12, the water is withdrawn from the lower circulating water outlet 6, and is returned to the raw water as circulating water via the outlet pipe 10. For this reason, a downward flow occurs in the discharge chamber 8. However, the discharge chamber 8 is provided below and below the lower end of the separation chamber 7, and the circulating water discharge section 6 is provided below the discharge chamber 8. Therefore, it is possible to minimize the entry of light contaminants into the circulating water. Also, even if contaminants are mixed into the circulating water, the circulating water merges with the raw water and is filtered again. Therefore, in terms of collecting solids (contaminants) from the raw water, the degree of recovery is high. It is possible to increase.

【００４１】また、ろ材２を循環させるに当って、エア
リフト管１５には下部及び中間部の双方から高圧空気が
流入するので、ろ床３２が厚い場合であっても円滑にろ
材２を揚送することができる。例えば、運転を休止して
いて始動する場合には、エアリフト管１５内の下部から
上部までろ材２が詰っているため、係るろ材２を、下部
からの加圧空気のみによって一挙に揚送することは困難
であるが、これに対し、中間部と下部とから二段階に加
圧空気を流入すれば、詰まったろ材２であっても円滑に
揚送することができる。When the filter medium 2 is circulated, high-pressure air flows into the air lift pipe 15 from both the lower part and the intermediate part, so that the filter medium 2 is smoothly pumped even when the filter bed 32 is thick. can do. For example, when the engine is stopped and started, since the filter medium 2 is clogged from the lower part to the upper part in the air lift pipe 15, the filter medium 2 should be pumped at once by only the pressurized air from the lower part. On the other hand, if the pressurized air flows in two stages from the middle part and the lower part, the clogged filter medium 2 can be smoothly pumped.

【００４２】さらに、取出管１０を、原水槽３９に直結
せず、原水供給管１１に設けたエジェクター１２に接続
したので、原水槽３９がろ過槽１から離れた位置にある
場合、取出管１０を、原水槽３９とろ過槽１との間の距
離や周囲の地形に応じた複雑で長い配管とする必要がな
く、原水槽１の近傍の原水供給管１１に容易に循環水の
循環路を形成することができる。Further, since the discharge pipe 10 is not directly connected to the raw water tank 39 but is connected to the ejector 12 provided in the raw water supply pipe 11, when the raw water tank 39 is located at a position away from the filtration tank 1, the discharge pipe 10 is not connected. It is not necessary to use a complicated and long pipe according to the distance between the raw water tank 39 and the filtration tank 1 and the surrounding terrain, and the circulation path of the circulating water can be easily provided to the raw water supply pipe 11 near the raw water tank 1. Can be formed.

【００４３】また、ろ床３２の下部に供給される原水
を、ループ状のヘッダー管３に立設された複数本の流入
管３５からループ状の分配傘３６を介して供給するよう
にしたので、ろ床３２を撹乱させることなく原水を均等
に供給することができ、清澄なろ液を得ることができ
る。また、ループ状の分配傘３２の上面は、洗浄再生さ
れたろ材２の流下方向が分散するように案内するので、
ろ材２が部分的に停滞するのを防止することができる。Also, the raw water supplied to the lower part of the filter bed 32 is supplied from a plurality of inflow pipes 35 erected on the loop-shaped header pipe 3 through the loop-shaped distribution umbrella 36. The raw water can be uniformly supplied without disturbing the filter bed 32, and a clear filtrate can be obtained. In addition, since the upper surface of the loop-shaped distributing umbrella 32 guides the filter medium 2 that has been washed and regenerated so that the flowing direction thereof is dispersed,
It is possible to prevent the filter medium 2 from partially stagnating.

【００４４】以上の説明で明らかなように、本実施の形
態に係るろ過装置３０は、汚染したろ材２はエアリフト
管１５を上昇する間に撹拌されて汚染物が剥離し、その
汚染物を含む洗浄水が系外に排出され、この洗浄水とは
別にろ液を連通部１９に流入させ、このろ液の上昇流に
より沈降するろ材２をすすぎ、すすぎ後のろ液の一部を
取出室８から取出して循環させるようにしたもので、特
に、分離室７に上下に調節自在で且つ処理水の溢流縁よ
りも下位の溢流縁を形成する堰板１８を設けたので、処
理水と洗浄水とのヘッド差を、堰板１８の上下によって
変更することにより、洗浄塔３１内を上昇するろ液の流
量、エアリフト管１５に流入する原水の流量、及び循環
水の流量を、簡単に増減することができる。As is apparent from the above description, in the filtering device 30 according to the present embodiment, the contaminated filter medium 2 is stirred while being lifted up the air lift tube 15 to separate the contaminant, and contains the contaminant. The washing water is discharged out of the system, the filtrate flows into the communication part 19 separately from the washing water, and the filter medium 2 which settles due to the ascending flow of the filtrate is rinsed, and a part of the filtrate after the rinsing is removed. In particular, the separation chamber 7 is provided with a weir plate 18 which can be adjusted up and down and forms an overflow edge lower than the overflow edge of the treated water. The head difference between the washing water and the washing water is changed by raising and lowering the weir plate 18 to easily reduce the flow rate of the filtrate rising in the washing tower 31, the flow rate of the raw water flowing into the air lift pipe 15, and the flow rate of the circulating water. Can be increased or decreased.

【００４５】従って、洗浄塔３１内には常にろ液の上昇
流が生じるので、汚染した洗浄水及び汚染物がろ液室９
中に混入することがない。また、原水の汚濁負荷等が変
動した場合には、堰板１８の上下位置を調整し、溢流す
る洗浄水の流量を増減させるだけで、エアリフト管１５
に流入する原水の流量が増減されて、移送洗浄されるろ
材２の量が増減されると共に、洗浄塔３１内を上昇する
ろ液の流量も増減されるので、簡単な運転制御によって
安定したろ過運転を行うことができる。さらに、汚染し
たろ材を移送洗浄するために用られた汚染物を多く含む
洗浄水のみを系外に排出し、且つ汚染物を含む可能性の
ある分離室の水については再循環によって汚染物を捕捉
するので、系外に捨てる洗浄水の量を最小限に抑え、高
い回収率で汚染物を回収することができる。Therefore, since the filtrate always flows upward in the washing tower 31, contaminated washing water and contaminants are removed from the filtrate chamber 9
There is no mixing in. Further, when the pollution load of the raw water fluctuates, the vertical position of the weir plate 18 is adjusted, and the flow rate of the overflowing washing water is simply increased or decreased.
The flow rate of the raw water flowing into the washing tower 31 is increased / decreased, and the amount of the filter medium 2 to be transferred and washed is increased / decreased, and the flow rate of the filtrate rising in the washing tower 31 is also increased / decreased. Driving can be performed. Furthermore, only the cleaning water containing a large amount of contaminants used for transferring and cleaning the contaminated filter media is discharged out of the system, and the water in the separation chamber which may contain the contaminants is recirculated to remove the contaminants. Since the water is trapped, the amount of washing water discarded outside the system can be minimized, and contaminants can be recovered at a high recovery rate.

【００４６】[0046]

【発明の効果】このように、この発明に係る移動床式ろ
過装置によれば、分離室に上下に調節自在で且つ処理水
の溢流縁よりも下位の溢流縁を形成する堰板を設けたの
で、処理水と洗浄水とのヘッド差を、堰板の上下によっ
て変更することにより、洗浄塔内を上昇するろ液の流
量、エアリフト管に流入する原水の流量、及び循環水の
流量を、簡単に増減することができる。As described above, according to the moving bed type filtration apparatus of the present invention, the weir plate that can be adjusted up and down and forms an overflow edge lower than the overflow edge of the treated water is provided in the separation chamber. Since the head difference between the treated water and the washing water is changed by the up and down of the weir plate, the flow rate of the filtrate rising in the washing tower, the flow rate of the raw water flowing into the air lift pipe, and the flow rate of the circulating water Can be easily increased or decreased.

【００４７】従って、洗浄塔内には常にろ液の上昇流が
発生するので、汚染した洗浄水及び汚染物がろ液室中に
混入することがない。また、原水の汚濁負荷等が変動し
た場合には、堰板の上下位置を調整し、溢流する洗浄水
の流量を増減させるだけで、エアリフト管に流入する原
水の流量が増減されて、移送洗浄されるろ材の量が増減
されると共に、洗浄塔内を上昇するろ液の流量も増減さ
れるので、簡単な運転制御によって安定したろ過運転を
行うことができる。さらに、汚染したろ材を移送洗浄す
るために用られた汚染物を多く含む洗浄水のみを系外に
排出し、且つ汚染物を含む可能性のある分離室の水につ
いては再循環によって汚染物を捕捉するので、系外に捨
てる洗浄水の量を最小限に抑え、高い回収率で汚染物を
回収することができる。Therefore, since the filtrate always flows upward in the washing tower, contaminated washing water and contaminants do not enter the filtrate chamber. If the pollution load of the raw water fluctuates, simply adjust the vertical position of the weir plate and increase or decrease the flow rate of the overflowing wash water, and the flow rate of the raw water flowing into the air lift pipe will be increased or decreased. Since the amount of the filter medium to be washed is increased and decreased and the flow rate of the filtrate rising in the washing tower is also increased and decreased, a stable filtration operation can be performed by a simple operation control. Furthermore, only the cleaning water containing a large amount of contaminants used for transferring and cleaning the contaminated filter media is discharged out of the system, and the water in the separation chamber which may contain the contaminants is recirculated to remove the contaminants. Since the water is trapped, the amount of washing water discarded outside the system can be minimized, and contaminants can be recovered at a high recovery rate.

【００４８】また、取出室からの循環水を循環させるに
当って、原水槽がろ過槽の近傍にある場合には、循環水
の取出管をろ過槽直結すれば良いが、原水槽がろ過槽か
ら離れた場所にある場合には、循環水の取出管をろ過槽
への原水の供給管に設けたエジェクター（引込器）に接
続すれば至便である。In circulating the circulating water from the extraction chamber, if the raw water tank is near the filtration tank, the circulating water extraction pipe may be directly connected to the filtration tank. If it is located away from the circulating water, it is convenient to connect the outlet pipe for circulating water to the ejector (retractor) provided in the feed pipe for raw water to the filtration tank.

【００４９】さらに、ろ床の下部に供給される原水を、
ループ状のヘッダー管から数本の流入管からループ状の
分配傘を介して供給するようにすれば、ろ床を撹乱させ
ることなく原水を均等に供給することができ、清澄なろ
液を得ることができる。また、ループ状の分配傘の上面
は、流下方向が分散するように洗浄再生されたろ材を案
内するので、ろ材が部分的に停滞するのを防止すること
ができる。Further, the raw water supplied to the lower part of the filter bed is
By supplying from a loop-shaped header pipe to several inflow pipes through a loop-shaped distribution umbrella, raw water can be supplied evenly without disturbing the filter bed, and a clear filtrate can be obtained. Can be. In addition, the upper surface of the loop-shaped distribution umbrella guides the filter medium that has been washed and regenerated so that the flowing direction is dispersed, so that the filter medium can be prevented from being partially stagnated.

【図面の簡単な説明】[Brief description of the drawings]

【図１】この発明の一実施の形態に係る移動ろ床式ろ過
装置を模式的に表した縦断面図である。FIG. 1 is a longitudinal sectional view schematically showing a moving filter type filtration device according to an embodiment of the present invention.

【図２】図１の一部を破断して示す斜面図である。FIG. 2 is a partially cutaway perspective view of FIG. 1;

【図３】図１のろ過装置を用いてた汚水処理のフローシ
ートである。FIG. 3 is a flow sheet of sewage treatment using the filtration device of FIG. 1;

【図４】図１のろ過装置に用いるエジェクターの一部を
破断して示す正面図である。FIG. 4 is a partially cutaway front view showing an ejector used in the filtration device of FIG. 1;

【符号の説明】[Explanation of symbols]

１ ろ過槽 ２ ろ材 ３ ヘッダー管 ４ 処理水の取出管 ５ 洗浄水排出部 ７ 分離室 ８ 取出室 ９ ろ液室 １０ 取出管 １１ 供給管 １２ エジェクター １５ エアリフト管 １８ 堰板 １９ 連通部 ３０ 移動ろ床式ろ過装置 ３１ 洗浄塔 ３２ ろ床 ３３ 原水供給源 ３４ 原水供給部 ３５ 流入管 ３６ 分配傘 ３８ 処理水溢流堰 ３９ 原水槽 ４０ 供給ポンプ Ｈ 処理水の上面 Ｈ１ 洗浄水の上面 DESCRIPTION OF SYMBOLS 1 Filtration tank 2 Filter medium 3 Header pipe 4 Treatment water extraction pipe 5 Washing water discharge section 7 Separation chamber 8 Extraction chamber 9 Filtration chamber 10 Extraction pipe 11 Supply pipe 12 Ejector 15 Air lift pipe 18 Weir plate 19 Communication section 30 Moving filter floor Type filtration device 31 Wash tower 32 Filter bed 33 Raw water supply source 34 Raw water supply unit 35 Inlet pipe 36 Distributor umbrella 38 Treated water overflow weir 39 Raw water tank 40 Supply pump H Upper surface of treated water H1 Upper surface of washed water

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】 ろ床を形成する比重１以上の粒状のろ材
が内部下方に積層され、前記ろ床上方のろ液室上部に設
けられた処理水溢流堰と、原水供給源に接続された下方
の原水供給部とを有し、該原水供給部から供給された原
水を、前記ろ床中を上昇させることによってろ過し、前
記処理水溢流堰から溢流させて処理水として排出するろ
過槽と、 下端が前記ろ床の下層部で開口し、下部及び中間部が圧
力空気の供給源に接続され、前記ろ材を、前記圧力空気
によって前記ろ床の底部から引き抜いて上方へ移送する
と共に洗浄再生するエアリフト管と、 前記ろ液室のろ液中に没入状態で設けられ、前記エアリ
フト管の上端が開口する上方の分離室と、該分離室に設
けられ上下に調節自在で且つ前記処理水の溢流縁よりも
下位の溢流縁を形成する堰板と、該堰板から溢流する洗
浄水を前記ろ過槽外へ排出する洗浄水排出部と、前記分
離室と前記ろ液室とを連通し該ろ液室のろ液が流入する
下方の連通部と、該連通部の外周に該連通部と略同心状
に配設されて前記分離室と連通する取出室とを有し、前
記エアリフト管の上端から前記分離室へ流入する前記洗
浄再生されたろ材と該ろ材から分離した汚染物のうち、
前記汚染物を、前記エアリフト管によって移送された洗
浄水と共に前記堰板から溢流して前記洗浄水排出部から
排出し、前記洗浄再生されて沈降するろ材を、前記連通
部から前記ろ床の上面へ供給する洗浄塔と、 前記洗浄塔の取出室の下部に接続された一端と、前記原
水供給源に接続された他端とを有し、前記連通部に流入
したろ液を前記原水供給源へ循環供給する取出管とを備
えたことを特徴とする移動ろ床式ろ過装置。1. A granular filter medium having a specific gravity of 1 or more forming a filter bed is laminated below the inside thereof, and connected to a treated water overflow weir provided above a filtrate chamber above the filter bed and a raw water supply source. And a raw water supply section below the raw water supply section. The raw water supplied from the raw water supply section is filtered by ascending in the filter bed, overflows from the treated water overflow weir, and is discharged as treated water. A filter tank, a lower end of which is opened in a lower part of the filter bed, a lower part and an intermediate part are connected to a supply source of pressurized air, and the filter medium is pulled out from the bottom of the filter bed by the pressurized air and transferred upward. An air lift pipe for washing and regenerating together, a separation chamber provided in the filtrate in the filtrate chamber in a state of being immersed, and an upper end of the air lift pipe being opened, and provided in the separation chamber so as to be adjustable up and down, and Weir that forms an overflow edge below the overflow edge of treated water A washing water discharge portion for discharging washing water overflowing from the weir plate to the outside of the filtration tank; and a lower communication through which the separation chamber and the filtrate chamber communicate with each other and the filtrate of the filtrate chamber flows. And an extraction chamber disposed substantially concentrically with the communication section on the outer periphery of the communication section and communicating with the separation chamber, wherein the washing and regeneration flowing from the upper end of the air lift pipe into the separation chamber are performed. Of the filter media and contaminants separated from the filter media,
The contaminant overflows from the weir plate together with the wash water transferred by the air lift pipe, is discharged from the wash water discharge unit, and the filter medium that is washed and regenerated and settles is removed from the communication unit by the upper surface of the filter bed. A washing tower for supplying to the lower part of the take-out chamber of the washing tower, and another end connected to the raw water supply source. And a take-out pipe for circulating and supplying to the filter. 【請求項２】 請求項１に記載の移動ろ床式ろ過装置で
あって、 前記原水供給源は、原水槽と、該原水槽と前記原水供給
部とを供給ポンプを介して接続する供給管とを備え、 前記取出管の他端は、前記供給管の前記供給ポンプより
も下流側にエジェクターを介して接続されていることを
特徴とする移動ろ床式ろ過装置。2. The filtration device according to claim 1, wherein the raw water supply source connects a raw water tank and the raw water tank and the raw water supply unit via a supply pump. Wherein the other end of the take-out pipe is connected to the supply pipe downstream of the supply pump via an ejector. 【請求項３】 請求項１に記載の移動ろ床式ろ過装置で
あって、 前記取出管の他端は、前記原水供給源を構成する原水槽
に接続されていることを特徴とする移動ろ床式ろ過装
置。3. The mobile filter apparatus according to claim 1, wherein the other end of the take-out pipe is connected to a raw water tank constituting the raw water supply source. Bed type filtration device. 【請求項４】 請求項１に記載の移動ろ床式ろ過装置で
あって、 前記原水供給部は、前記ろ過槽の下方に設けられ前記原
水供給源に接続されているループ状のヘッダー管と、該
ヘッダー管に立設された複数本の流入管と、該流入管の
上端開口の上方に設けられ該流入管から流出する原水を
均等に配分するループ状の分配傘とを備えたことを特徴
とする移動ろ床式ろ過装置。4. The mobile filter type filtration device according to claim 1, wherein the raw water supply unit is provided below the filter tank and connected to the raw water supply source with a loop-shaped header pipe. A plurality of inflow pipes erected on the header pipe, and a loop-shaped distribution umbrella provided above the upper end opening of the inflow pipe to evenly distribute raw water flowing out of the inflow pipe. Characteristic mobile filter type filtration device.
JP01680397A 1996-06-27 1997-01-30 Moving filter filter Expired - Fee Related JP3903510B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP01680397A JP3903510B2 (en) 1996-06-27 1997-01-30 Moving filter filter
KR1019970008934A KR100206647B1 (en) 1996-06-27 1997-03-17 Apparatus for filter
TW086103485A TW330848B (en) 1996-06-27 1997-03-20 Moving filter bed type filtering apparatus

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP18826296 1996-06-27
JP8-188262 1996-06-27
JP01680397A JP3903510B2 (en) 1996-06-27 1997-01-30 Moving filter filter

Publications (2)

Publication Number Publication Date
JPH1071305A true JPH1071305A (en) 1998-03-17
JP3903510B2 JP3903510B2 (en) 2007-04-11

Family

ID=26353200

Family Applications (1)

Application Number Title Priority Date Filing Date
JP01680397A Expired - Fee Related JP3903510B2 (en) 1996-06-27 1997-01-30 Moving filter filter

Country Status (3)

Country Link
JP (1) JP3903510B2 (en)
KR (1) KR100206647B1 (en)
TW (1) TW330848B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1325138C (en) * 2003-09-15 2007-07-11 中国石油化工股份有限公司 Device for removing suspended matter in water
JP2009113017A (en) * 2007-11-09 2009-05-28 Takahiro Yamamoto Filtration apparatus
JP2013516317A (en) * 2010-01-08 2013-05-13 パークソン コーポレーション Method and computer program product for treating an impurity-containing liquid
JP2013094769A (en) * 2011-11-07 2013-05-20 Sanki Eng Co Ltd Moving bed type upflow continuous sand filtering apparatus and operation method thereof
CN115090030A (en) * 2022-07-27 2022-09-23 江西江岳环保科技有限公司 Method for observing blockage degree of filter medium through flow change of cleaning agent

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100699551B1 (en) * 2005-07-27 2007-03-26 인제대학교 산학협력단 A device for water treatment
KR101224510B1 (en) * 2012-08-20 2013-01-21 주식회사 화인 Upflow type sand filter for nitrogen and turbidity treatment
KR101711038B1 (en) * 2015-04-21 2017-02-28 화승개발 주식회사 Sewage Treatment Equipment
EP3315203B1 (en) 2016-10-31 2019-07-03 Alfa Laval Corporate AB A separation disc for a centrifugal separator

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1325138C (en) * 2003-09-15 2007-07-11 中国石油化工股份有限公司 Device for removing suspended matter in water
JP2009113017A (en) * 2007-11-09 2009-05-28 Takahiro Yamamoto Filtration apparatus
JP2013516317A (en) * 2010-01-08 2013-05-13 パークソン コーポレーション Method and computer program product for treating an impurity-containing liquid
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
JP2013094769A (en) * 2011-11-07 2013-05-20 Sanki Eng Co Ltd Moving bed type upflow continuous sand filtering apparatus and operation method thereof
CN115090030A (en) * 2022-07-27 2022-09-23 江西江岳环保科技有限公司 Method for observing blockage degree of filter medium through flow change of cleaning agent
CN115090030B (en) * 2022-07-27 2023-06-23 江西江岳环保科技有限公司 Method for observing clogging degree of filter medium through cleaning agent flow rate change

Also Published As

Publication number Publication date
TW330848B (en) 1998-05-01
JP3903510B2 (en) 2007-04-11
KR100206647B1 (en) 1999-07-01
KR19980069716A (en) 1998-10-26

Similar Documents

Publication Publication Date Title
US6641737B2 (en) Vertical filter
US8152998B2 (en) Screenless granular media filters and methods of use
WO2001080966A1 (en) Vertical filter and method
JPH1071305A (en) Moving filter bed type filter
JP3127470B2 (en) Sand filtration equipment
KR100869312B1 (en) Apparatus for purificating polluted water by flotation and sedimentation
JP3809648B2 (en) Moving filter filter
JP4277589B2 (en) Upflow filter
CN108408986B (en) lake filter
JP3284529B2 (en) Transfer device for filter media in mobile filter bed filter
JP3303284B2 (en) Mobile filter bed filtration device
JP3106859B2 (en) Settling pond filtration equipment
JPH0621525Y2 (en) Continuous sand filter
KR102050980B1 (en) Water purifier system having water purifier process and backwash process
JPH0717365Y2 (en) Continuous sand filter
JP4021729B2 (en) Moving bed filter
KR200292147Y1 (en) Filtrate washing device of continuous washing filter
KR100544829B1 (en) A loss prevention trough of filtering material
JP2504668Y2 (en) Continuous sand filter
JPH09276885A (en) Biological membrane filter apparatus using foldable filter material
JPH09155110A (en) Apparatus for cleaning filter medium in moving filter bed filter
JPH09150015A (en) Moving bed type filtration device
JP3082538B2 (en) Precision filtration equipment
JPS6323705A (en) Upward counterflow continuous filter
KR19980056151U (en) Suspension Remover

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20050915

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20060104

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20060222

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20060627

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20060811

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20061219

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20070101

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100119

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110119

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120119

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130119

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140119

Year of fee payment: 7

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees