JP2003265905A - Flocculating and settling apparatus - Google Patents

Flocculating and settling apparatus

Info

Publication number
JP2003265905A
JP2003265905A JP2002071305A JP2002071305A JP2003265905A JP 2003265905 A JP2003265905 A JP 2003265905A JP 2002071305 A JP2002071305 A JP 2002071305A JP 2002071305 A JP2002071305 A JP 2002071305A JP 2003265905 A JP2003265905 A JP 2003265905A
Authority
JP
Japan
Prior art keywords
raw water
flocs
filtration tank
conical body
bodies
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
Application number
JP2002071305A
Other languages
Japanese (ja)
Inventor
Kunio Fujita
邦夫 藤田
Yasutaka Suetsugu
康隆 末次
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 JP2002071305A priority Critical patent/JP2003265905A/en
Publication of JP2003265905A publication Critical patent/JP2003265905A/en
Pending legal-status Critical Current

Links

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flocculating and settling apparatus which can continuously be operated stably over a long time at a small injection rate of a chemical even when raw water having high turbidity is treated. <P>SOLUTION: Conical bodies (4...) each having many through-holes (3...) are arranged vertically in a filtration tank (1) at several stages. A circular body (5) is fixed to each of the bodies (4b, 4c) arranged in the upper part of the bottom end of the tank (1). The lowermost body (4a) is inserted into the lowermost body (5) to form a gap (7) between the bodies (4a) and (5). A precipitate flow passage (8) is formed between the inner peripheral wall of the tank (1) and the body (5). A filter medium layer (12) to be packed with a floatable packing material (10) consisting of a flat, short and cylindrical filter medium is formed in the upper part of the bodies (4...). Flocks in raw water are grown by the slow agitation action generated when an upward stream of the raw water passes through the through-holes (3...), made to fall down through the passage (8) without being affected by the upward stream of the raw water, precipitated and concentrated. The material (10) which captures flocks and is settling down is swayed by the rising water current so that the captured flocks are peeled off and dropped out and the flock-free material (10) is made to float in the layer (12). <P>COPYRIGHT: (C)2003,JPO

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、河川水、雨水あ
るいは工場排水などの原液に無機または有機凝集剤を添
加して原水中に含まれる微細な懸濁物質を凝集フロック
化して沈殿分離させる凝集沈殿装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flocculation in which an inorganic or organic flocculant is added to a stock solution such as river water, rainwater or industrial wastewater to flocculate and precipitate fine suspended substances contained in the raw water. Regarding precipitation equipment.

【0002】[0002]

【従来の技術】従来、原水中の凝集フロックを多段に配
設した分離板で沈殿分離させる凝集沈殿装置は周知であ
り、例えば、特開平5−200205号公報に記載して
あるように、傾斜板に平行四辺形の幅方向傾斜板を配設
した沈殿装置も公知である。また、沈殿槽に多数の傾斜
板とその上方に浮上性のろ材充填部を設け、粒径の大き
い懸濁物を傾斜板の上に沈殿させ、粒径の小さい懸濁物
を浮上性ろ材で除去して、浮上性ろ材が目詰まりした時
に、空気導入管から空気を吹込んでろ材を流動・撹拌す
る装置も、例えば、特開平7−80210号公報に記載
してあるように公知である。
2. Description of the Related Art Conventionally, a flocculation-sedimentation device for precipitating and separating flocculation flocs in raw water by means of separation plates arranged in multiple stages is well known. For example, as described in JP-A-5-200205, A settling device in which a parallelogram-width inclined plate is arranged on the plate is also known. In addition, a large number of slant plates and a levitation filter material filling section above the slant plate were installed in the settling tank to suspend suspensions with a large particle size on the slant plate, and suspensions with a small particle size were used as floating filter media. An apparatus for blowing air from an air introduction pipe to flow and agitate the filter medium when the floatable filter medium is clogged after removal is also known, for example, as described in JP-A-7-80210.

【0003】[0003]

【発明が解決しようとする課題】上記従来の傾斜板は凝
集した重いフロックの分離が可能であるが、軽い微細フ
ロックは傾斜板を通過して分離水中に混入していた。こ
れらの処理水を砂ろ過装置や浮上ろ材装置で二次処理を
行うと、急激な目詰まりが発生し、頻繁に洗浄する必要
がある。また、粒径の大きい懸濁物を傾斜板の上に沈殿
させ、粒径の小さい懸濁物を浮上性ろ材で除去する装置
にあっては、接触沈殿作用による処理であり、高速で処
理した場合、ブレークスルー現象が起き易く除濁率の低
下の恐れがあった。そして、上記従来の槽壁から流入さ
せた原水を上向流で通水する装置にあっては、沈殿濃縮
ゾーンが原水流入位置より下部にあり、原水中の微細な
懸濁物質の上向きの流れが、粗大化した凝集フロックの
沈降の邪魔をして、沈降分離に支障を来していた。この
発明は、上記の従来の課題を解決するために、高濁度原
水においても少ない薬品注入率で長時間に渡って安定し
た連続運転を可能とし、大きな処理速度と除濁機能を有
する凝集沈殿装置を提供する。
The conventional inclined plate described above is capable of separating agglomerated heavy flocs, but light fine flocs have been mixed into the separated water after passing through the inclined plate. If these treated waters are subjected to secondary treatment with a sand filter device or a floating filter medium device, sudden clogging occurs and it is necessary to wash them frequently. Further, in a device in which a suspension having a large particle size is settled on an inclined plate and a suspension having a small particle size is removed by a floating filter, it is a process by a contact precipitation action, and is processed at a high speed. In this case, a breakthrough phenomenon is likely to occur and there is a risk that the turbidity removal rate may decrease. Then, in the device for passing the raw water flowing in from the conventional tank wall in the upward flow, the precipitation concentration zone is below the raw water inflow position, and the upward flow of fine suspended substances in the raw water. However, it interfered with the sedimentation of the coarse flocculated flocs, which hindered the sedimentation separation. In order to solve the above-mentioned conventional problems, the present invention enables stable continuous operation for a long time with a low chemical injection rate even in high turbidity raw water, and has a large treatment speed and a flocculating function having a turbidity removing function. Provide a device.

【0004】[0004]

【課題を解決するための手段】この発明に係る凝集沈殿
装置の要旨は、ろ過槽に原液を上向流で供給し、多段に
配設した分離板で懸濁粒子を分離させる沈殿装置におい
て、上記ろ過槽に多数の通孔を設けた円錐体を複数段に
垂設し、下端部上方の円錐体に円環体を止着し、下方の
円錐体を上方の円環体に挿入して、円環体と円錐体の間
に間隙を設けると共に、ろ過槽の内周壁と円環体との間
に沈殿流路を形成し、下端部の円錐体の下方近傍に原液
の供給口を配設したもので、原水は円錐体の円錐部の通
孔を通過する際の乱流によりフロックが成長し、成長し
たフロックは、円錐部の斜面を滑り落ち、原水の上向流
に影響を受けることなく、沈殿流路から沈殿する。
Means for Solving the Problems The gist of a flocculating and precipitating apparatus according to the present invention is to supply a stock solution to a filtration tank in an upward flow, and to separate suspended particles by separating plates arranged in multiple stages. The conical body provided with a large number of through holes in the filtration tank is vertically suspended in a plurality of stages, the circular body is fixed to the conical body above the lower end portion, and the lower conical body is inserted into the upper circular body. , A gap is provided between the torus and the conical body, a precipitation flow path is formed between the inner wall of the filtration tank and the torus, and the feed port for the undiluted solution is arranged near the lower end of the conical body. The raw water causes flocs to grow due to turbulent flow when passing through the conical hole of the cone, and the grown flocs slide down the slope of the cone and are affected by the upward flow of the raw water. Without precipitation from the precipitation channel.

【0005】上端部の円錐体に止着した円環体の上方に
近接して円筒体を配設し、この円筒体に円錐体の上半部
を挿入したもので、上段の円錐体を通過した微細フロッ
クは円筒体で整流化されて、比重の重い微細フロック
が、円錐体の円錐部の斜面を滑り落ち、沈殿流路から沈
殿させて、微細フロックの分離も可能となる。そして、
ろ過槽に空隙率の大きな浮上充填材を収納してろ材層を
形成させたもので、浮上充填材は空隙率が大きく凹凸の
ない短尺筒状ろ材を使用してランダムに積層してあり、
上向流に対するよどみ部分が形成され、微細なフロック
を沈着させてフロック同士を結合させ、成長したフロッ
クを沈降分離させる。また、多くのフロックを捕捉した
浮上充填材は落下して、沈降している間に円錐体の通孔
から上昇する水流により揺動して捕捉したフロックが剥
離脱落し、再び洗浄された新しい浮上充填材としてろ材
層に浮上して、微細フロックを捕捉することができる。
少ない薬品注入率で長時間に渡って安定した連続運転を
可能とし、大きな処理速度と除濁機能が発揮できる。
A cylindrical body is disposed in the vicinity of an annular body fixed to the cone at the upper end, and the upper half of the cone is inserted into the cylindrical body. The fine flocs are rectified by the cylindrical body, and the fine flocs having a large specific gravity slide down on the slope of the conical portion of the conical body and settle out from the settling channel, so that the fine flocs can be separated. And
A filter material layer is formed by storing a levitation filler having a large porosity in a filtration tank, and the levitation filler is randomly laminated using short tubular filter media having a large porosity and no irregularities,
A stagnation portion for the upward flow is formed, and fine flocs are deposited to bond the flocs to each other, and the grown flocs are separated by sedimentation. Also, the floating material that has captured many flocs falls, and while it is settling, it swings due to the water flow rising from the through hole of the conical body, and the flocs that have captured are separated and fallen off, and a new floating surface is washed again. As a filler, the fine flocs can be captured by floating on the filter layer.
It enables stable continuous operation for a long time with a small chemical injection rate, and can exhibit a large processing speed and turbidity.

【0006】[0006]

【発明の実施の形態】この発明に係る凝集沈殿装置は上
記のように構成してあり、原水中に少量の凝集剤と中和
剤を添加して、原液供給口から円錐体の下方近傍に上向
流で流入させる。凝集フロックを含む原水は、垂設した
下端部の円錐体に流入し、重いフロックは循環流により
円環体の内周壁を伝ってろ過槽の底部に沈殿する。下端
部の円錐体を通過して上昇する原水は、さらに上部の円
錐体の通孔を通過するまでの乱流によりフロックが成長
し、成長した比重の重いフロックは、上方の円錐体の通
孔を通過することなく、円錐体の円錐部の斜面を滑り落
ちる。原水の上向流に影響を受けることなく、沈殿流路
から沈殿して濃縮される。
BEST MODE FOR CARRYING OUT THE INVENTION The flocculation-sedimentation apparatus according to the present invention is configured as described above, and a small amount of flocculant and neutralizing agent are added to raw water so that the raw water is fed from the feed port to the vicinity of the lower part of the cone. Allow upflow. Raw water containing agglomerated flocs flows into the vertically downward conical body, and heavy flocs settle on the bottom of the filtration tank along the inner peripheral wall of the torus due to the circulating flow. In the raw water that rises after passing through the cone at the lower end, flocs grow due to turbulent flow until it passes through the holes in the cone at the upper part. Slide down the slope of the cone of the cone without passing through. It is concentrated from the settling channel without being affected by the upward flow of raw water.

【0007】上記の動作を繰返しながら、上向流と円錐
体の通孔との間に発生する水流の撹乱による緩速撹拌作
用で、フロックが成長して沈殿する。円錐体を通過する
原水中のフロックは徐々に微細粒子となり、垂設した円
錐体を通過して成長しきれなかった微細なフロックは、
円筒体で整流化されてろ材層を形成する浮上充填材に流
入し、凹凸のない短尺筒状ろ材により上向流に対するよ
どみ部分が形成され、原水中に含まれる微細フロックを
沈降させ、また微細フロック同士が結合して成長させ
る。多くのフロックを捕捉した浮上充填材は、比重が水
より重くなり沈殿するが、浮上充填材は沈降している間
に揺動して捕捉したフロックが剥離脱落し、洗浄された
新しい浮上充填材として、再びろ材層に浮上して微細フ
ロックを捕捉する。浮上充填材のろ材層で微細なフロッ
クを分離した処理水をろ過槽上部から抜き出す。そし
て、沈殿した比重の重いフロックが、濃縮室に沈降して
沈殿濃縮汚泥となり適宜ろ過槽の槽底より濃縮汚泥を抜
出す。
While repeating the above operation, flocs grow and precipitate due to the slow stirring action due to the disturbance of the water flow generated between the upward flow and the through hole of the conical body. The flocs in the raw water that pass through the cone gradually become fine particles, and the fine flocs that could not grow up after passing through the vertically placed cone are
It flows into the levitation filler that is rectified by the cylindrical body and forms the filter layer, and the short tubular filter that has no irregularities forms a stagnation part against the upward flow, which causes the fine flocs contained in the raw water to settle and Flocks grow together. Floating fillers that have captured many flocs settle because the specific gravity becomes heavier than water, but the floating fillers rock while they settle, and the flocs that have been trapped peel off and are washed off. As a result, the fine flocs are captured again by floating on the filter layer. The treated water from which fine flocs have been separated by the filter layer of the floating filler is drawn out from the upper part of the filtration tank. Then, the flocs having a large specific gravity that have settled down settle in the concentration chamber to become settled concentrated sludge, and the concentrated sludge is appropriately extracted from the bottom of the filtration tank.

【0008】[0008]

【実施例】この発明に係る凝集沈殿装置について、図面
に基づき詳述すると、図1は凝集沈殿装置であって、円
筒状に形成したろ過槽1の下部に原水供給管2を連結
し、その供給口2aをろ過槽1の中心部に開口してあ
り、少量の凝集剤と中和剤を添加した原水を、供給口2
aから上向流で流入させる。図2はろ過槽に垂設した円
錐体の拡大図であって、原液の供給口2aの上方近傍に
上半部に多数の通孔3…を設けた円錐体4が複数段に垂
設してあり、この発明の実施例では、3段に垂設してあ
り、上方の2段の円錐体4b、4cには、その下端に円
環体5、5が止着してある。下方の円錐体4の上半部を
上方の円環体5に挿入してあり、下方の円錐体4a、4
bの下端と上方の円環体5、5の下端が垂設した平板状
のリブ6、6の一端に連結してあり、円環体5と円錐体
4の間に間隙7を設けてある。図3に示すように、リブ
6の他端がろ過槽1の内周面に止着して、ろ過槽1の内
周壁と円環体5との間に沈殿流路8を形成してある。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The coagulation-sedimentation apparatus according to the present invention will be described in detail with reference to the drawings. FIG. 1 shows a coagulation-sedimentation apparatus in which a raw water supply pipe 2 is connected to a lower portion of a filtration tank 1 formed in a cylindrical shape. The supply port 2a is opened at the center of the filtration tank 1, and raw water added with a small amount of a coagulant and a neutralizing agent is supplied to the supply port 2a.
It is made to flow upward from a. FIG. 2 is an enlarged view of a conical body vertically installed in a filtration tank. A conical body 4 having a large number of through holes 3 ... In the embodiment of the present invention, it is vertically provided in three stages, and the annular bodies 5, 5 are fixed to the lower ends of the upper two stages of cones 4b, 4c. The upper half of the lower cone 4 is inserted into the upper annular body 5, and the lower cones 4 a, 4
The lower end of b and the lower ends of the upper annular members 5 and 5 are connected to one ends of vertically extending flat plate-shaped ribs 6, 6 and a gap 7 is provided between the annular member 5 and the conical member 4. . As shown in FIG. 3, the other end of the rib 6 is fixed to the inner peripheral surface of the filtration tank 1 to form a precipitation channel 8 between the inner peripheral wall of the filtration tank 1 and the annular body 5. .

【0009】原水中の懸濁物質は、下段の円錐体4aの
多数の通孔3…を通過する際の乱流によりフロックが成
長し、成長した重いフロックは、上方の円錐体4bの通
孔3を通過することなく、円錐体4aの斜面から滑り落
ちて沈殿流路8に流入し、原水の上向流に影響を受ける
ことなく沈殿流路8を沈殿する。上方の円錐体4bの通
孔3…を通過する原水は、上向流と円錐体4bの通孔3
との間に発生する水流の撹乱による緩速撹拌作用で、フ
ロックが成長して沈殿する。垂設した円錐体4cを通過
する原水中のフロックは分離されて、だんだんと微細粒
子となりながら上記動作を繰返す。
The suspended matter in the raw water grows due to turbulent flow when passing through a large number of through holes 3 in the lower cone 4a, and the heavy flocs that grow grow through the holes in the upper cone 4b. Without passing through No. 3, it slides down from the slope of the cone 4a and flows into the settling channel 8, and the settling channel 8 is settled without being affected by the upward flow of raw water. The raw water passing through the through holes 3 of the upper cone 4b has an upward flow and the through holes 3 of the cone 4b.
The flocs grow and precipitate due to the slow stirring action due to the disturbance of the water flow generated between the and. The flocs in the raw water passing through the vertically-arranged conical body 4c are separated and gradually become fine particles, and the above operation is repeated.

【0010】図1に示すように、上端部の円環体5の上
方に円筒体9が配設してあり、この円筒体9の下端と円
錐体4cの下端がリブ6の一端に連結してある。上端部
の円錐体4cの上半部を円筒体9に挿入して、円筒体9
と円錐体4cの間に間隙7を設けてある。リブ6の他端
をろ過槽1の内周面に止着して、ろ過槽1と円筒体9の
間に沈殿流路8を形成してある。上段の円錐体4cを通
過した微細フロックは円筒体9で整流化されて、比重の
重い微細フロックが分離される。円筒体9に到る凝集フ
ロックは、複数段に配設した円錐体4a、4b、4cで
多くの懸濁物質が分離されるため非常に少なくなり、凝
集剤の添加量も少なくてよい。
As shown in FIG. 1, a cylinder 9 is disposed above the annular body 5 at the upper end, and the lower end of the cylinder 9 and the lower end of the cone 4c are connected to one end of the rib 6. There is. The upper half of the cone 4c at the upper end is inserted into the cylindrical body 9 to
There is a gap 7 between the and the cone 4c. The other end of the rib 6 is fixed to the inner peripheral surface of the filtration tank 1 to form a precipitation channel 8 between the filtration tank 1 and the cylindrical body 9. The fine flocs that have passed through the upper conical body 4c are rectified by the cylindrical body 9 to separate fine flocs having a large specific gravity. The aggregated flocs reaching the cylindrical body 9 are very small because many suspended substances are separated by the cones 4a, 4b, 4c arranged in a plurality of stages, and the amount of the aggregating agent added may be small.

【0011】図1に示すように、ろ過槽1に配設した円
筒体9の上方に浮上充填材10…が収納してあり、ろ過
槽1の上部に張設した上部ろ材流出防止網11の下方に
ろ材層12を形成してある。浮上充填材10は、空隙率
が大きく凹凸のない短尺筒状ろ材をランダムに積層して
ある。尚、符号19はろ材層12の下部に設けた下部ろ
材流出防止網である。原水中に含まれる微細なフロック
がろ材層12に流入して上昇してくる。微細なフロック
を沈着させてフロック同士を結合させ、成長したフロッ
クの一部を落下させる。また、多くのフロックを捕捉し
た浮上充填材10…は比重が水より重くなり落下する。
浮上充填材10は沈降している間に円錐体4の通孔3か
ら上昇する水流により揺動して捕捉したフロックが剥離
脱落し、再び洗浄された新しい浮上充填材10としてろ
材層12に戻り微細フロックを捕捉する。凝集剤は少量
の添加量のため、凝集フロックは粘着性の少ない沈降性
と剥離性の優れたフロックとなり、凹凸の少ない浮上充
填材10を使用するため、容易に沈殿したフロックを剥
離させることができる。浮上充填材10は大きな空隙率
を持っているため、長時間の連続運転が可能となる。
As shown in FIG. 1, floating fillers 10 ... Are accommodated above a cylindrical body 9 arranged in the filtration tank 1, and an upper filter medium outflow prevention net 11 stretched above the filtration tank 1 is provided. The filter medium layer 12 is formed below. The floating filler 10 is formed by randomly stacking short tubular filter media having a large porosity and no irregularities. Reference numeral 19 is a lower filter medium outflow prevention mesh provided below the filter medium layer 12. The fine flocs contained in the raw water flow into the filter medium layer 12 and rise. Fine flocs are deposited to combine the flocs with each other, and some of the grown flocs are dropped. Further, the floating fillers 10 ... Capturing a large amount of flocs fall because the specific gravity becomes heavier than water.
While the floating filler 10 is settling, the flocs captured by rocking due to the water flow rising from the through hole 3 of the cone 4 are separated and dropped off, and returned to the filter medium layer 12 as a new washed floating filler 10 again. Captures fine flocs. Since the flocculant is added in a small amount, flocculation flocs become flocs with low stickiness and excellent releasability, and since the floating filler 10 with few irregularities is used, the flocs that have precipitated can be easily peeled off. it can. Since the floating filler 10 has a large porosity, it can be continuously operated for a long time.

【0012】ろ過槽1の底部を逆円錐状とした沈殿濃縮
部13が設けてあり、成長したフロックを沈殿流路8か
ら沈殿させて濃縮貯留し、適宜、排泥管14から濃縮汚
泥を抜出す。ろ過槽1の上部に処理水管15を連結した
処理水室16が設けてあり、ろ材層12を通過した処理
水を処理水管15から排出する。なお、処理能力の低下
したろ過層12の洗浄は、ろ材層12の下方のろ過槽1
に連結した洗浄排水管17から円筒体9の近傍まで水を
排出した後、処理水室16に配設した洗浄水管18から
適宜ろ材層12に洗浄水を噴射してシャワリングを行え
ば、浮上充填材10の洗浄が行える。
A sedimentation / concentration unit 13 in which the bottom of the filtration tank 1 has an inverted conical shape is provided, and the grown flocs are sedimented from the sedimentation flow path 8 to be concentrated and stored. put out. A treated water chamber 16 connected to the treated water pipe 15 is provided above the filtration tank 1, and the treated water that has passed through the filter medium layer 12 is discharged from the treated water pipe 15. In addition, the cleaning of the filtration layer 12 having a reduced processing capacity is performed by the filtration tank 1 below the filter material layer 12.
After draining the water from the washing drainage pipe 17 connected to the vicinity of the cylindrical body 9, the washing water pipe 18 disposed in the treated water chamber 16 sprays the washing water to the filter medium layer 12 to shower the water. The filling material 10 can be washed.

【0013】[0013]

【発明の効果】以上のように、この発明の凝集沈殿装置
は、ろ過槽に多段に垂設した円錐体からなる分離装置と
浮上充填材からなるろ過層を組合せたので、少ない薬品
注入率で長時間に渡って安定した連続運転を可能とし、
大きな処理速度と除濁機能が発揮できる。即ち、従来の
高濁原水の凝集沈殿処理では、頻繁に洗浄する必要があ
り、ブレークスルー現象が起き易く除濁率悪化の恐れが
あった。また、原水中の微細な懸濁物質が、粗大化した
凝集フロックの沈降分離に支障を来していたものである
が、この発明にあっては、多数の通孔を設けた円錐体を
複数段に垂設し、下方の円錐体を上方の円環体を止着し
た円垂体に挿入して、円環体と円錐体の間に間隙を設
け、ろ過槽の内周壁と円環体との間に沈殿流路を形成し
たので、円錐体の通孔を通過する原水は、上向流と円錐
体の通孔との間に発生する水流の撹乱による緩速撹拌作
用でフロックを成長させ、円錐体の斜面を滑り落ちて、
原水の上向流に影響を受けることなく、沈殿流路から流
下して沈殿濃縮できる。
As described above, the coagulation-sedimentation apparatus of the present invention is a combination of a separation device consisting of conical bodies suspended in multiple stages in a filtration tank and a filtration layer composed of a floating filler, so that the chemical injection rate is low. Enables stable continuous operation for a long time,
High processing speed and turbidity can be demonstrated. That is, in the conventional coagulation-sedimentation treatment of highly turbid raw water, it is necessary to wash it frequently, and a breakthrough phenomenon is likely to occur, and there is a possibility that the turbidity may be deteriorated. Further, the fine suspended matter in the raw water hinders the sedimentation and separation of the coarse flocculated flocs. In the present invention, a plurality of cones having a large number of through holes are provided. Vertically installed in a step, insert the lower conical body into the conical body to which the upper circular body is fixed, and provide a gap between the circular body and the conical body to form the inner wall of the filtration tank and the circular body. Since a settling flow path was formed between the two, the raw water passing through the through hole of the conical body grows flocs by the slow stirring action due to the disturbance of the water flow generated between the upward flow and the through hole of the conical body. , Slide down the slope of the cone,
The sediment can be concentrated by flowing down from the sedimentation channel without being affected by the upward flow of raw water.

【0014】上端部の円錐体に止着した円環体の上方に
近接して円筒体を配設し、この円筒体に円錐体の上半部
を挿入したもので、上段の円錐体を通過した微細フロッ
クは円筒体で整流化されて、比重の重い微細フロックが
分離され、円筒体に到る凝集フロックは、非常に少なく
なり、凝集剤の添加量も少なくなる。また、ろ過槽に空
隙率の大きな浮上充填材を収納してろ材層を形成させた
ので、上向流に対するよどみ部分が形成され、微細なフ
ロックを沈着させてフロック同士を結合させて沈降分離
ができる。そして、浮上充填材を凹凸のない短尺筒状ろ
材としたので、フロックを捕捉した浮上充填材は沈降し
ている間に上昇水流により揺動してフロックが剥離脱落
し、再びろ材層に浮上して、微細フロックを捕捉するこ
とができる。
A cylindrical body is disposed in the vicinity of an annular body fixed to the cone at the upper end portion, and the upper half of the cone is inserted into this cylindrical body. The fine flocs are rectified in the cylinder to separate the fine flocs having a high specific gravity, the aggregate flocs reaching the cylinder are very small, and the amount of the flocculant added is also small. In addition, since the filter material layer was formed by storing the floating filler with a large porosity in the filtration tank, a stagnation part was formed against the upward flow, and fine flocs were deposited and the flocs were bonded to each other to cause sedimentation separation. it can. Since the floating filler is a short tubular filter medium with no irregularities, the floating filler that has captured the flocs is shaken by the rising water flow while it is settling, the flocs are peeled off, and floated again on the filter layer. As a result, fine flocs can be captured.

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

【図1】この発明に係る凝集沈殿装置の縦断側面図であ
る。
FIG. 1 is a vertical cross-sectional side view of a coagulating sedimentation apparatus according to the present invention.

【図2】同じく、ろ過槽に垂設した円錐体の側断面図で
ある。
FIG. 2 is likewise a side sectional view of a conical body vertically provided in the filtration tank.

【図3】同じく、ろ過槽に垂設した円錐体の平面図であ
る。
FIG. 3 is likewise a plan view of a conical body vertically provided in a filtration tank.

【符号の説明】[Explanation of symbols]

1 ろ過槽 2a 供給口 3 通孔 4、4a、4b、4c 円錐体 5 円環体 7 間隙 8 沈殿流路 9 円筒体 10 浮上充填材 12 ろ材層 1 filtration tank 2a Supply port 3 through holes 4, 4a, 4b, 4c cone 5 torus 7 Gap 8 sedimentation channels 9 cylindrical body 10 Floating filler 12 Filter media layer

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI テーマコート゛(参考) B01D 29/08 540A ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) B01D 29/08 540A

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 ろ過槽(1)に原液を上向流で供給し、
多段に配設した分離板で懸濁粒子を分離させる沈殿装置
において、上記ろ過槽(1)に多数の通孔(3…)を設
けた円錐体(4)を複数段に垂設し、下段の円錐体(4
a)の上方の円錐体(4b、4c)に円環体(5)を止
着し、下端部上方の円環体(5)に挿入して、円環体
(5)と円錐体(4)の間に間隙(7)を設けると共
に、ろ過槽(1)の内周壁と円環体(5)との間に沈殿
流路(8)を形成し、下端部の円錐体(4a)の下方近
傍に原液の供給口(2a)を配設したことを特徴とする
凝集沈殿装置。
1. An undiluted solution is supplied to the filtration tank (1) in an upward flow,
In a settling device for separating suspended particles by separating plates arranged in multiple stages, a conical body (4) provided with a large number of through holes (3 ...) Is vertically installed in a plurality of stages in the filtration tank (1), and a lower stage is provided. Cone (4
The annular body (5) is fixed to the upper conical body (4b, 4c) of a) and inserted into the upper annular body (5) of the lower end portion so that the conical body (5) and the conical body (4) ) Between the inner wall of the filtration tank (1) and the torus (5) to form a settling channel (8), and the lower end of the conical body (4a). A coagulating sedimentation apparatus, characterized in that a supply port (2a) for the undiluted solution is arranged near the lower part.
【請求項2】 上記上端部の円錐体(4c)に止着した
円環体(5)の上方に近接して円筒体(9)を配設し、
この円筒体(9)に円錐体(4c)の上半部を挿入した
ことを特徴とする請求項1に記載の凝集沈殿装置。
2. A cylindrical body (9) is arranged in the vicinity of the upper side of the annular body (5) fixed to the conical body (4c) at the upper end,
The coagulating sedimentation apparatus according to claim 1, wherein the upper half of the conical body (4c) is inserted into the cylindrical body (9).
【請求項3】 上記ろ過槽(1)に浮上充填材(10)
を収納して、ろ材層(12)を形成させたことを特徴と
する請求項1または2に記載の凝集沈殿装置。
3. The floating filler (10) in the filtration tank (1).
The coagulating sedimentation apparatus according to claim 1 or 2, characterized in that the filter medium layer (12) is housed therein.
【請求項4】 上記浮上充填材(10)は、空隙率が大
きく凹凸のない短尺筒状ろ材をランダムに積層して、ろ
材層(12)を形成させたことを特徴とする請求項3に
記載の凝集沈殿装置。
4. The floating filler (10) is characterized in that short tubular filter media having a large porosity and no irregularities are randomly laminated to form a filter media layer (12). The described coagulating sedimentation device.
JP2002071305A 2002-03-15 2002-03-15 Flocculating and settling apparatus Pending JP2003265905A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002071305A JP2003265905A (en) 2002-03-15 2002-03-15 Flocculating and settling apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002071305A JP2003265905A (en) 2002-03-15 2002-03-15 Flocculating and settling apparatus

Publications (1)

Publication Number Publication Date
JP2003265905A true JP2003265905A (en) 2003-09-24

Family

ID=29201622

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002071305A Pending JP2003265905A (en) 2002-03-15 2002-03-15 Flocculating and settling apparatus

Country Status (1)

Country Link
JP (1) JP2003265905A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100646309B1 (en) 2005-07-11 2006-11-23 유네코개발 주식회사 Apparatus for filtering sludge from water for purification
JP2010172872A (en) * 2009-02-02 2010-08-12 Okada Sangyo Kk Muddy water treatment apparatus
WO2012075682A1 (en) * 2010-12-08 2012-06-14 Li Jinmin Solid-liquid separation device and use thereof in wastewater treatment
JP2016215138A (en) * 2015-05-21 2016-12-22 谷口商会株式会社 Silt filter device and silt filter method
CN111982593A (en) * 2020-08-07 2020-11-24 西华师范大学 Water sample anti-interference split charging device
JP7424779B2 (en) 2019-09-26 2024-01-30 環境電子株式会社 filtration equipment

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100646309B1 (en) 2005-07-11 2006-11-23 유네코개발 주식회사 Apparatus for filtering sludge from water for purification
JP2010172872A (en) * 2009-02-02 2010-08-12 Okada Sangyo Kk Muddy water treatment apparatus
WO2012075682A1 (en) * 2010-12-08 2012-06-14 Li Jinmin Solid-liquid separation device and use thereof in wastewater treatment
JP2016215138A (en) * 2015-05-21 2016-12-22 谷口商会株式会社 Silt filter device and silt filter method
JP7424779B2 (en) 2019-09-26 2024-01-30 環境電子株式会社 filtration equipment
CN111982593A (en) * 2020-08-07 2020-11-24 西华师范大学 Water sample anti-interference split charging device

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