JPH0947604A - Batch type upward flow filter apparatus using floating filter medium - Google Patents
Batch type upward flow filter apparatus using floating filter mediumInfo
- Publication number
- JPH0947604A JPH0947604A JP7230638A JP23063895A JPH0947604A JP H0947604 A JPH0947604 A JP H0947604A JP 7230638 A JP7230638 A JP 7230638A JP 23063895 A JP23063895 A JP 23063895A JP H0947604 A JPH0947604 A JP H0947604A
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- Prior art keywords
- main body
- water
- floating
- cleaning water
- filter medium
- 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.)
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- Filtering Materials (AREA)
- Filtration Of Liquid (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、浮上▲ろ▼過層３を形
成し、これに濁水を上昇流で送入して▲ろ▼過すると共
に、適当な時期に▲ろ▼材を洗浄再生する回分式上昇流
▲ろ▼過装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention forms a floating overlayer 3 into which turbid water is sent in an ascending flow to filter it and at the same time wash the filter material. The present invention relates to a batch type ascending flow filtering device for regeneration.
【０００２】[0002]
【従来の技術】従来の回分式▲ろ▼過装置は▲ろ▼材に
砂又はアンスラサイト・砂を使用した単層又は二層の▲
ろ▼過層によって下向きに▲ろ▼過し、逆洗洗浄と表面
洗浄を備えた回分式下向流▲ろ▼過装置が多い。2. Description of the Related Art A conventional batch-type filtration device is a single-layer or two-layer filter which uses sand or anthracite / sand as the filter material.
There are many batch-type down-flow filtration devices that perform back-flushing and surface cleaning by filtering downwards due to over-layering.
【０００３】[0003]
【発明が解決しようとする課題】従来の回分式下向流▲
ろ▼過装置にあっては、▲ろ▼過層の厚さが大きく、且
つ砂などの比重の大きい▲ろ▼材を使用しているため
に、▲ろ▼過層の洗浄（以下、逆洗という）にあたっ
て、多量の洗浄水を必要とし、また、逆洗に要する時間
が長いという問題点があった。さらに、洗浄時の砂相互
の衝突により、砂が損耗し、絶えず新しい砂を▲ろ▼材
として補給しなければならないという欠点があった。ま
た、▲ろ▼過層の圧力損失が大きいために▲ろ▼過装置
の設計圧力が高くなり、強固な構造の装置を必要とする
という問題点もあった。[Problems to be Solved by the Invention] Conventional batch type downward flow ▲
In the filtration device, the filtration layer has a large thickness and a large specific gravity such as sand. There is a problem in that a large amount of washing water is required in the case of "washing" and the time required for backwashing is long. Further, there is a drawback that the sands are worn due to the collision of the sands during cleaning, and new sand must be constantly supplied as a filter material. Further, since the pressure loss of the filtration layer is large, the design pressure of the filtration device becomes high, and there is a problem that a device having a strong structure is required.
【０００４】本発明は、浮上▲ろ▼過層３を用い、ま
た、洗浄水を循環して逆洗を行うことによって、逆洗に
使用する洗浄水量や濁水の送入圧力を低減すると共に逆
洗に必要な時間を短縮し、さらに、抗菌材を含有する浮
上▲ろ▼材を使用することによって、浮上▲ろ▼過層３
および処理水中でのバクテリアの増殖を抑制する回分式
上昇流▲ろ▼過装置を得ることを目的とする。According to the present invention, the floating overlayer 3 is used, and the backwash is performed by circulating the wash water to reduce the amount of wash water used for the backwash and the feed pressure of muddy water, and By reducing the time required for washing and by using a levitation filter material containing an antibacterial material, the levitation filter layer 3
Another object of the present invention is to obtain a batch-type upflow filtration device that suppresses bacterial growth in treated water.
【０００５】[0005]
【課題を解決するための手段】前記の目的を達成するた
めに、本発明の▲ろ▼過装置にあっては、浮上▲ろ▼過
層３を形成して、これに濁水を上昇流で送入して▲ろ▼
過するとともに、▲ろ▼過層の逆洗には、洗浄水（処理
水又は濁水を使用）を循環することによって浮上▲ろ▼
過層３を繰返し洗浄するものである。また、抗菌材を含
有する浮上▲ろ▼材を使用することによって浮上▲ろ▼
過層３および処理水中でのバクテリアの増殖を抑制する
ものである。In order to achieve the above-mentioned object, in the filtration apparatus of the present invention, a floating filtration layer 3 is formed, and muddy water is made to flow upwardly by this. Send it in ▲ ro ▼
In addition, the backflush of the overlayer floats by circulating wash water (using treated water or muddy water).
The overlayer 3 is repeatedly washed. In addition, by using a levitating material containing an antibacterial material, levitating
It suppresses the growth of bacteria in the upper layer 3 and the treated water.
【０００６】浮上▲ろ▼過層３を形成する位置は本体１
の適当な個所とすることが可能であるが、後記の理由に
より、特に、本体１内の▲ろ▼材分離板２の直下が効果
的である。The position where the surfacing 3 is formed is the body 1
However, it is particularly effective just below the filter material separating plate 2 in the main body 1 for the reason described later.
【０００７】浮上▲ろ▼過層３を形成するには、本体１
の上部に▲ろ▼材分離板２を設けて、濁水を上昇流で送
入する圧力と▲ろ▼材に働く浮力を支持せしめ、常に、
浮上▲ろ▼過層３が▲ろ▼材分離板２を押上げる状態に
保持することが好ましい。[0007] To form the surfacing 3, the main body 1
A filter material separation plate 2 is provided on the upper part of the table to support the pressure for feeding muddy water in an upward flow and the buoyancy acting on the filter material.
It is preferable to hold the floating overlayer 3 in a state of pushing up the filter material separating plate 2.
【０００８】浮上▲ろ▼材は水面上に浮上する程度の浮
力をもつものが好ましく、発泡樹脂製のものや、これに
無機粉末や抗菌材、例えば、多孔質アルミノ珪酸塩、リ
ン酸カルシウム、炭酸カルシウムなどの無機物や銀など
の抗菌性金属イオンを混合したものを用いる。The floating material preferably has a buoyancy to the extent that it floats above the water surface, and is made of foamed resin, or inorganic powder or antibacterial material such as porous aluminosilicate, calcium phosphate or calcium carbonate. A mixture of inorganic substances such as and antibacterial metal ions such as silver is used.
【０００９】逆洗にあっては、洗浄水（処理水又は濁水
を使用）はポンプ４によって本体１上部の洗浄水注入口
９から接線方向に本体１の内部に送入され旋回流を形成
しながら下降して、本体１の底部より排出する。これを
再びポンプ４により吸引して本体１上部の注入口９から
送入して前記のように循環する。タイマーなどによって
予め設定した時間（以下、設定時間という）、洗浄水の
循環による逆洗を行う。この間、▲ろ▼材は洗浄水の旋
回流によって撹拌を受け、捕捉された濁質分は▲ろ▼材
から剥離する。また、▲ろ▼材は撹拌を受けながらも水
面上に浮上して、循環する洗浄水に同伴して流出するこ
となく、本体１内に滞留する。In backwashing, washing water (using treated water or turbid water) is pumped into the inside of the main body 1 tangentially from the washing water inlet 9 at the top of the main body 1 by the pump 4 to form a swirling flow. While descending, it is discharged from the bottom of the main body 1. This is again sucked by the pump 4, fed from the inlet 9 in the upper portion of the main body 1, and circulated as described above. Backwashing is performed by circulating wash water for a preset time (hereinafter, referred to as set time) by a timer or the like. During this period, the filter medium is agitated by the swirling flow of the washing water, and the trapped suspended matter is separated from the filter medium. Further, the filter medium floats above the water surface while being stirred, and stays in the main body 1 without flowing out along with the circulating cleaning water.
【００１０】逆洗は▲ろ▼過層の圧力損失が予め定めた
値に達するか、或いは▲ろ▼過時間が設定時間経過した
後に開始するが、開始に先立って、本体内の水位を洗浄
開始レベル５まで下げる。この後、本体に残留する水量
を前記のようにポンプ４によって本体１内を循環して、
設定時間逆洗を行う。The backwashing is started after the pressure loss of the overlayer reaches a predetermined value or after the overtime exceeds a set time, but the water level in the main body is washed before starting. Lower to start level 5. After that, the amount of water remaining in the main body is circulated in the main body 1 by the pump 4 as described above,
Backwash for set time.
【００１１】予め設定した逆洗時間が経過すれば、洗浄
水の循環を停止する。本体１内に滞留する洗浄水（以
下、逆洗排水という）中の剥離濁質分を沈降分離するた
めに静置した後、逆洗排水を本体１底部より本体１外へ
排出する。排出は排水停止レベル６に水位が到達すると
停止する。従って、逆洗排水量は逆洗一回当たり、本体
内に設定した、洗浄開始レベル５と排水停止レベル６の
間に存在する水量に相当することになる。When the preset backwash time has elapsed, the circulation of the wash water is stopped. After leaving to stand for separation and separation of the suspended suspended matter in the wash water (hereinafter, referred to as backwash drainage) staying in the body 1, the backwash drainage is discharged from the bottom of the body 1 to the outside of the body 1. Discharge stops when the water level reaches the drainage stop level 6. Therefore, the backwash drainage amount corresponds to the amount of water existing between the washing start level 5 and the drainage stop level 6 set in the main body per backwash.
【００１２】この後、さらに逆洗が必要な場合は、ポン
プ４によって洗浄水（処理水又は濁水を使用）を再び本
体１上部から注入し、洗浄開始レベル５まで水位が上昇
すれば、洗浄水を循環して前記のように逆洗を行う。After this, if further backwashing is required, wash water (using treated water or turbid water) is reinjected from the upper part of the main body 1 by the pump 4, and if the water level rises to the wash start level 5, the wash water And backwash as described above.
【００１３】逆洗が完了すれば、ポンプ４により濁水を
本体１下部より送入して▲ろ▼材が水面に浮上した状態
で、本体１内を水位が上昇し上部の▲ろ▼材分離板２に
到達すれば浮上▲ろ▼過層３が形成され、再び▲ろ▼過
が開始される。When the backwashing is completed, turbid water is sent from the lower part of the main body 1 by the pump 4 and the water level rises in the main body 1 while the filter material floats on the water surface, and the filter material at the upper part is separated When the plate 2 is reached, the levitation filter layer 3 is formed, and the filtering process is started again.
【００１４】[0014]
【作用・効果】前記のような構成と手段をもつ▲ろ▼過
装置にあって、一回当たりの逆洗排水量は洗浄水を循環
して逆洗を行うので、本体１内に設定した洗浄開始レベ
ル５と排水停止レベル６の間に存在する水量に相当す
る。従って逆洗を二回行えば、逆洗排水量は二倍に相当
することになる。[Operation / Effect] In the filtration device having the above-mentioned configuration and means, the backwashing water amount for each wash is such that the backwashing is performed by circulating the wash water. This corresponds to the amount of water existing between the start level 5 and the drainage stop level 6. Therefore, if backwashing is performed twice, the amount of backwash drainage will be doubled.
【００１５】つぎに、浮上▲ろ▼材と浮上▲ろ▼過層３
に捕捉した濁質分の比重差が極めて大きいので、洗浄水
を本体１上部の洗浄水注入口９から接線方向に送入すれ
ば、サイクロン効果によって本体１の内部に旋回流が発
生し、前記の大きい比重差が極めて有効に作用し、軽い
▲ろ▼材は上方へ、重い濁質は本体壁面から下方へと移
動するため▲ろ▼材からの濁質分の分離が容易に進行す
る。Next, the levitation material and the levitation overlayer 3
Since the difference in specific gravity of the suspended matter trapped in is extremely large, if washing water is tangentially fed from the washing water inlet 9 in the upper part of the main body 1, a swirling flow is generated inside the main body 1 due to the cyclone effect, The large difference in the specific gravity of the filter acts very effectively, and the light filter medium moves upward and the heavy suspended matter moves downward from the main body wall surface, so the separation of suspended matter from the filter medium easily proceeds.
【００１６】さらに、旋回流による撹拌をうける▲ろ▼
材が相互に衝突したり、或いは本体壁面と衝突すると、
▲ろ▼材が弾性体であるために、衝突の衝撃によって▲
ろ▼材表面が伸縮しこれが濁質分の剥離の一助をなして
いる。[0016] Further, it is agitated by a swirling flow.
When the materials collide with each other or collide with the wall surface of the main body,
▲ The material is elastic, so the impact of a collision
The surface of the filter material expands and contracts, which helps to remove the suspended matter.
【００１７】これら作用の相乗効果によって、▲ろ▼材
からの濁質分の剥離が促進されるので、浮上▲ろ▼過層
３を旋回流で逆洗することは、逆洗に必要な時間を短縮
するのに有効に働いている。The synergistic effect of these actions promotes the separation of suspended matters from the filter material. Therefore, backwashing the floating overlayer 3 with a swirl flow is a time required for backwashing. It works effectively in shortening.
【００１８】また、浮上▲ろ▼過層３の初期の圧力損失
は［▲ろ▼材の嵩比重］と［▲ろ▼過層の厚さ］の積で
与えられる。浮上▲ろ▼材では嵩比重が極めて小さく、
また▲ろ▼過層厚さも小さいので▲ろ▼過層の濁質分に
よる目詰まりを考慮しても、砂▲ろ▼過層に比べると圧
力損失ははるかに小さい。このために、本体１への濁水
の送入圧力は管路、弁などの圧力損失を加算してもなお
小さいものになる。The initial pressure loss of the levitation filter layer 3 is given by the product of [bulk specific gravity of the filter material] and [thickness of the filter layer]. The bulk density of the floating material is extremely small,
Also, since the thickness of the overlayer is small, the pressure loss is much smaller than that of the sand overlayer, even if clogging due to suspended matter in the overlayer is taken into consideration. For this reason, the feed pressure of the muddy water to the main body 1 is still small even if the pressure loss of the pipes, valves, etc. is added.
【００１９】従って、浮上▲ろ▼材で浮上▲ろ▼過層３
を構成する▲ろ▼過装置においては、装置の設計圧力や
濁水送入ポンプの動力を下向流砂▲ろ▼過装置に比べて
低減することができる。Therefore, the surfacing layer 3 is floated by the surfacing material.
In the filtration device constituting the above, the design pressure of the device and the power of the muddy water feeding pump can be reduced as compared with the downflow sand filtration device.
【００２０】さらに、浮上▲ろ▼材に抗菌性金属イオン
を含む無機粉末を混合したものを使用して、浮上▲ろ▼
過層３を形成し▲ろ▼過を行う場合には、浮上▲ろ▼過
層３や、処理水中でのバクテリアの増殖を抑制するとい
う効果がある。Further, a floatation filter is prepared by mixing inorganic powder containing antibacterial metal ions with the floatation filter.
When forming the overlayer 3 and performing filtration, there is an effect of suppressing the growth of bacteria in the floating overlayer 3 and the treated water.
【００２１】[0021]
【実施例１】発泡樹脂製浮上▲ろ▼材を用いて泥水の▲
ろ▼過を行った。直径１，２００ｍｍの▲ろ▼過本体上
部に粒径０．５〜２ｍｍφ、嵩比重０．０５の浮上▲ろ
▼材を充填し、４００ｍｍ厚さの浮上▲ろ▼過層を形成
して、上昇流で泥水（濁度５４ｍｇ／ｌ）を▲ろ▼過速
度８ｍ／時で▲ろ▼過し、濁度５ｍｇ／ｌの処理水を得
た。逆洗排水量、逆洗時間、送入圧力などを以下に示
す。 連続▲ろ▼過時間 １６時間 逆洗回数 ２回 逆洗時間 ５分 （１回目の逆洗） ８分 （２回目の逆洗） 逆洗排水量合計 ２．５ｍ３ （１．２５ｍ３／回×２回） ＰＡＣ添加 １８ｐｐｍ 高分子凝集剤 添加せず 泥水送入圧力 ０．１５ｋｇ／ｃｍ２（１６時間一定） ▲ろ▼材は逆洗２回で再生し、続く連続１８時間▲ろ▼
過においても性能に異常は認められなかった。[Example 1] Using a floating resin-made floating material, muddy water
Ro ▼ I made a mistake. The upper part of the filter body with a diameter of 1,200 mm is filled with a floating filter material having a particle size of 0.5 to 2 mmφ and a bulk specific gravity of 0.05, and a floating filter layer having a thickness of 400 mm is formed. Muddy water (turbidity 54 mg / l) was filtered in an ascending flow at a filtration speed of 8 m / hour to obtain treated water having a turbidity of 5 mg / l. The backwash drainage, backwash time, feed pressure, etc. are shown below. Continuous ▲ Filter ▼ Over time 16 hours Number of backwashing 2 times Backwashing time 5 minutes (1st backwashing) 8 minutes (2nd backwashing) Total backwash drainage 2.5m 3 (1.25m 3 / times ×) 2 times) PAC added 18ppm Polymer coagulant not added Muddy water feed pressure 0.15kg / cm 2 (16 hours constant) ▼ Filter material was rewashed twice and continued for 18 hours ▲ filter
No abnormalities were observed in the performance even when overloaded.
【００２２】[0022]
【実施例２】砕石洗浄白濁水を樹脂製浮上▲ろ▼過層に
よって▲ろ▼過処理した。直径１，２００φの▲ろ▼過
本体上部に２ｍｍφ以下の浮上▲ろ▼材を充填して浮上
▲ろ▼過層３７０ｍｍを形成し、上昇流で砕石洗浄白濁
水（濁度５０ｐｐｍ、ｐＨ＝８．２）を▲ろ▼過速度１
２ｍ／時で２０時間３０分連続▲ろ▼過した後逆洗を行
った。処理水濁度の経時変化、逆洗排水量、逆洗時間、
送入圧力などは以下の通りである。 逆洗回数 ２回 逆洗排水量合計 ２．５ｍ３ （１．２５ｍ３／回×２回） 逆洗時間 ８分 （１回当たり） ＰＡＣ添加 ５．３ｐｐｍ 高分子凝集剤 添加せず 送入圧力 ０．３ｋｇ／ｃｍ２ ▲ろ▼材層固形分負荷 １９ｋｇ／ｍ２ [Example 2] Crushed stone washed white turbid water was filtered by a resin floatation layer. A 1,200φ diameter filter was filled with a floating material of 2mmφ or less on the upper part of the body to form a floating 370mm overlayer, and crushed stones washed turbid water (turbidity 50ppm, pH = 8 2) ▲ Ro ▼ Overspeed 1
After continuous filtration at 2 m / hour for 20 hours and 30 minutes, back washing was performed. Change in turbidity of treated water with time, backwash drainage, backwash time,
The feeding pressure and the like are as follows. Number of backwash 2 times Total backwash drainage 2.5m 3 (1.25m 3 / times x 2) Backwash time 8 minutes (per wash) PAC added 5.3ppm Polymeric flocculant not added Feeding pressure 0 .3 kg / cm 2 ▲ Roll layer solid content load 19 kg / m 2
【００２３】[0023]
【図１】本発明の浮上▲ろ▼材を使用する回分式上昇流
▲ろ▼過装置の一態様を示す概念図である。FIG. 1 is a conceptual diagram showing one embodiment of a batch-type upward flow filtering device using a floating filter material of the present invention.
１ 本体 ２ ▲ろ▼材分離板 ３ 浮上▲ろ▼材よりなる浮上▲ろ▼過層 ４ ポンプ ５ 洗浄開始レベル ６ 排水停止レベル ７ 薬注装置 ８ａ バルブ ８ｂ バルブ ８ｃ バルブ ８ｄ バルブ ８ｅ バルブ ８ｆ バルブ ８ｇ バルブ ８ｈ バルブ ８ｉ バルブ ８ｊ バルブ ８ｋ バルブ ９ 洗浄水注入口 １０ 流入圧力計 １１ 流量計 １２ａ ▲ろ▼過管路 １２ｂ 洗浄管路 １２ｃ 逆洗排水管路 1 Main body 2 ▼ Filter separation plate 3 Floating ▼ Filter levitation ▼ Filter ▼ Overlayer 4 Pump 5 Cleaning start level 6 Drainage stop level 7 Chemical injection device 8a valve 8b valve 8c valve 8d valve 8e valve 8f valve 8g Valve 8h Valve 8i Valve 8j Valve 8k Valve 9 Wash water inlet 10 Inflow pressure gauge 11 Flow meter 12a ▲ Filter pipe 12b Wash pipe 12c Backwash drain pipe
Claims (4)
（以下浮上▲ろ▼過層という）を形成し、これに汚濁水
（以下濁水という）を上昇流で送入して▲ろ▼過を行う
と共に適当な時期に洗浄水を循環することによって前記
浮上▲ろ▼過層３を洗浄再生する回分式上昇流▲ろ▼過
装置。1. A levitation overlayer 3 made of levitation material.
(Hereinafter referred to as “floating overlayer”), polluted water (hereinafter referred to as “turbid water”) is sent in an ascending flow into this to perform filtration, and by circulating wash water at an appropriate time, Flotation-batch type upflow filtration device for cleaning and regenerating the overlayer 3.
求項１の▲ろ▼過装置。2. The filtering device according to claim 1, wherein a very lightweight floating material is used.
置本体１（以下本体という）に接線方向に送入し循環す
る請求項１の▲ろ▼過装置。3. The filtration device according to claim 1, wherein the cleaning water for the floating filtration layer 3 is tangentially fed into the filtration device main body 1 (hereinafter referred to as the main body) and circulated.
る請求項１の▲ろ▼過装置。4. The filtration device according to claim 1, wherein a floating filter material containing an antibacterial material is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7230638A JPH0947604A (en) | 1995-08-04 | 1995-08-04 | Batch type upward flow filter apparatus using floating filter medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7230638A JPH0947604A (en) | 1995-08-04 | 1995-08-04 | Batch type upward flow filter apparatus using floating filter medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0947604A true JPH0947604A (en) | 1997-02-18 |
Family
ID=16910932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7230638A Pending JPH0947604A (en) | 1995-08-04 | 1995-08-04 | Batch type upward flow filter apparatus using floating filter medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0947604A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006239546A (en) * | 2005-03-02 | 2006-09-14 | Hitachi Plant Technologies Ltd | Sand separating and washing apparatus |
-
1995
- 1995-08-04 JP JP7230638A patent/JPH0947604A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006239546A (en) * | 2005-03-02 | 2006-09-14 | Hitachi Plant Technologies Ltd | Sand separating and washing apparatus |
| JP4633502B2 (en) * | 2005-03-02 | 2011-02-16 | 株式会社日立プラントテクノロジー | Sand separation and cleaning equipment |
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