JP4825850B2 - Floating separator, rectifier, and split cell for rectifier - Google Patents

Floating separator, rectifier, and split cell for rectifier Download PDF

Info

Publication number
JP4825850B2
JP4825850B2 JP2008188637A JP2008188637A JP4825850B2 JP 4825850 B2 JP4825850 B2 JP 4825850B2 JP 2008188637 A JP2008188637 A JP 2008188637A JP 2008188637 A JP2008188637 A JP 2008188637A JP 4825850 B2 JP4825850 B2 JP 4825850B2
Authority
JP
Japan
Prior art keywords
treated
water
rectifying
floating
tank
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.)
Active
Application number
JP2008188637A
Other languages
Japanese (ja)
Other versions
JP2010022964A (en
Inventor
友明 宮ノ下
俊朗 國東
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.)
Organo Corp
Original Assignee
Organo Corp
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 Organo Corp filed Critical Organo Corp
Priority to JP2008188637A priority Critical patent/JP4825850B2/en
Publication of JP2010022964A publication Critical patent/JP2010022964A/en
Application granted granted Critical
Publication of JP4825850B2 publication Critical patent/JP4825850B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Physical Water Treatments (AREA)

Description

本発明は、被処理水中の被処理物質に気泡を付着させ、被処理物質を浮上物として分離する浮上分離装置の技術に関する。   The present invention relates to a technique of a levitation separation device that attaches bubbles to a substance to be treated in water to be treated and separates the substance to be treated as a floating substance.

従来、被処理水中に含まれるＳＳ成分、油分等の被処理物質を除去する方法として、被処理水と気泡とを混合して、浮上槽に供給し、被処理物質に気泡を付着させて浮上槽の水面に浮上させ、被処理物質を分離する浮上処理が知られている。なお、処理効率を上げるために、被処理水を浮上槽に供給する前に、凝集剤を添加して、被処理水中に含まれる被処理物質をフロック化させることも行われている。   Conventionally, as a method of removing SS components, oils, and other substances to be treated contained in the water to be treated, the water to be treated and bubbles are mixed and supplied to the levitation tank. A levitation process is known that floats on the surface of a tank and separates a substance to be treated. In addition, in order to raise processing efficiency, before supplying to-be-processed water to a levitation tank, a flocculant is added and the to-be-processed substance contained in to-be-processed water is made to flock.

例えば、特許文献１には、被処理水中の被処理物質に気泡を付着させ、被処理物質を浮上物として分離する浮上分離装置が公開されている。図８は、特許文献１の浮上分離装置の構成を示す模式図である。図８に示す浮上分離装置３において、浮上槽６０の周壁６０ａは矩形であり、浮上槽６０内は、上部開放の隔壁６２ａ，下部開放の隔壁６２ｂにより、被処理水が縦方向に迂回して流れる三つの室、第１の室６４、第２の室６６、第３の室６８に区画されている。また、第２の室６６の隔壁６２ａと隔壁６２ｂとの間には、整流部７０が水平に設置され、第２の室６６が垂直方向上部６７ａ及び下部６７ｂに区画されている。整流部７０には、複数の整流孔７０ａが形成されており、第２の室６６から第３の室６８に至る水は整流部７０を通過する。第１の室６４には、被処理水流入管７２が接続されている。また、加圧水流入管７４の一端は第１の室６４に接続され、他端は空気溶解タンク７５の出口に接続されている。第３の室６８には、処理水排出管７６が接続されている。空気溶解タンク７５と処理水排出管７６との間には、ポンプ７８を介して連通管８０が接続され、処理水排出管７６を通る処理水の一部が連通管８０を通り、空気溶解タンク７５に供給される。空気溶解タンク７５では、処理水に空気を溶解させ、加圧水が製造される。   For example, Patent Document 1 discloses a levitation separation device that attaches bubbles to a substance to be treated in the water to be treated and separates the substance to be treated as a floating substance. FIG. 8 is a schematic diagram showing the configuration of the flotation separation device of Patent Document 1. As shown in FIG. In the levitation separation apparatus 3 shown in FIG. 8, the peripheral wall 60a of the levitation tank 60 is rectangular, and the treated water is detoured in the vertical direction by the upper open partition 62a and the lower open partition 62b. The three chambers are divided into a first chamber 64, a second chamber 66, and a third chamber 68. Further, the rectifying unit 70 is horizontally installed between the partition wall 62a and the partition wall 62b of the second chamber 66, and the second chamber 66 is partitioned into an upper portion 67a and a lower portion 67b in the vertical direction. A plurality of rectifying holes 70 a are formed in the rectifying unit 70, and water from the second chamber 66 to the third chamber 68 passes through the rectifying unit 70. A treated water inflow pipe 72 is connected to the first chamber 64. One end of the pressurized water inflow pipe 74 is connected to the first chamber 64, and the other end is connected to the outlet of the air dissolution tank 75. A treated water discharge pipe 76 is connected to the third chamber 68. A communication pipe 80 is connected between the air dissolution tank 75 and the treated water discharge pipe 76 via a pump 78, and a part of the treated water passing through the treated water discharge pipe 76 passes through the communication pipe 80, and the air dissolution tank 75. In the air dissolution tank 75, air is dissolved in the treated water to produce pressurized water.

このような浮上分離装置３において、被処理水流入管７２から第１の室６４に流入した被処理水、空気溶解タンク７５から加圧水流入管７４を通り第１の室６４に流入した加圧水は、液面に向かって上昇して、隣接する第２の室６６の上部６７ａに流入する。第２の室６６の上部６７ａでは、加圧水に溶解していた気体が気泡として析出し、被処理水中の被処理物質（ＳＳ成分、油分等）に付着し、被処理物質が浮上分離される。被処理物質が除去された処理水は、整流部７０に設けた整流孔７０ａを通り、第２の室６６の下部６７ｂに供給され、第３の室６８から処理水排出管７６へ排出される。   In such a levitation separator 3, the water to be treated that has flowed into the first chamber 64 from the water to be treated 72 and the pressurized water that has flowed from the air dissolution tank 75 through the pressurized water inflow tube 74 into the first chamber 64 are liquid. It rises toward the surface and flows into the upper portion 67a of the adjacent second chamber 66. In the upper portion 67a of the second chamber 66, the gas dissolved in the pressurized water is deposited as bubbles, adheres to the material to be treated (SS component, oil, etc.) in the water to be treated, and the material to be treated is floated and separated. The treated water from which the material to be treated has been removed passes through the rectifying hole 70 a provided in the rectifying unit 70, is supplied to the lower portion 67 b of the second chamber 66, and is discharged from the third chamber 68 to the treated water discharge pipe 76. .

米国特許出願公開第２００５／０１１５８８１号明細書US Patent Application Publication No. 2005/0115881

ところで、気泡が付着しても浮上することができない比重の重い被処理物質や、気泡が十分付着しなかった被処理物質は、浮上槽６０の底部に沈殿する。図９は、特許文献１の浮上分離装置で用いられる整流部の構成を示す模式断面図である。図９に示すように、整流孔７０ａ（図９では整流孔７０ａを斜線部で表している）は、浮上槽６０の上部６７ａ側に開口した上部開口部７１ａから浮上槽６０の下部６７ｂ側に開口した下部開口部７１ｂまで整流孔７０ａの水平断面積が同一となるように構成されている。このような構成では、上記沈殿物が、浮上槽６０の下部６７ｂ側へ排出され難く、整流部７０上に堆積してしまう。整流部７０上に沈殿物が堆積していくと、整流孔７０ａを通過する処理水によって、一度に多量の沈殿物が、第３の室６８側へ排出され易くなる。その結果、装置の連続運転による処理水の水質が悪化し、処理水の有効利用や環境水としての放流が不可能となってしまう。   By the way, a material to be processed having a high specific gravity that cannot float even if bubbles are attached, or a material to be processed to which bubbles are not sufficiently attached are deposited at the bottom of the levitation tank 60. FIG. 9 is a schematic cross-sectional view showing a configuration of a rectifying unit used in the floating separation device of Patent Document 1. As shown in FIG. 9, the rectifying hole 70 a (in FIG. 9, the rectifying hole 70 a is represented by a hatched portion) extends from the upper opening 71 a opened to the upper portion 67 a side of the floating tank 60 to the lower 67 b side of the floating tank 60. The horizontal cross-sectional area of the rectifying hole 70a is the same up to the opened lower opening 71b. In such a configuration, the deposit is not easily discharged to the lower portion 67 b side of the floating tank 60 and is deposited on the rectifying unit 70. When the deposit accumulates on the rectifying unit 70, a large amount of the precipitate is easily discharged to the third chamber 68 side at once by the treated water passing through the rectifying hole 70a. As a result, the quality of the treated water due to continuous operation of the apparatus deteriorates, making it impossible to effectively use the treated water or discharge it as environmental water.

そこで、本発明の目的は、装置の連続運転による処理水の水質悪化を抑制することができる浮上分離処理装置を提供することにある。   Then, the objective of this invention is providing the floating separation processing apparatus which can suppress the water quality deterioration of the treated water by the continuous driving | operation of an apparatus.

本発明は、被処理水中の被処理物質に気泡を付着させ、被処理物質を浮上物として分離する浮上分離装置であって、浮上槽と、前記浮上槽を垂直方向上部及び下部に区画する整流部と、前記上部に被処理水を流入させる流入部と、前記被処理物質が分離された処理水を前記下部から集水する集水部とを有し、前記整流部は、前記処理水を通水させる複数の整流孔を備え、前記整流孔は、上部開口部と、前記上部開口部の面積より小さい下部開口部と、前記上部開口部から前記下部開口部に至るスロープ部と、を有する。   The present invention is a levitation separator that attaches bubbles to a substance to be treated in water to be treated and separates the substance to be treated as a levitated substance, and includes a levitation tank and a rectifier that divides the levitation tank into an upper part and a lower part in a vertical direction. And an inflow part for allowing treated water to flow into the upper part, and a water collecting part for collecting treated water from which the treated substance is separated from the lower part, and the rectifying part The rectifying hole includes a plurality of rectifying holes that allow water to pass therethrough, and the rectifying hole includes an upper opening, a lower opening that is smaller than an area of the upper opening, and a slope that extends from the upper opening to the lower opening. .

また、前記浮上分離装置において、前記整流孔同士は、上部開口部同士が隣接するように配列されている。   Further, in the levitation separation apparatus, the rectifying holes are arranged so that upper openings are adjacent to each other.

また、前記浮上分離装置において、前記スロープ部の傾斜角は、４５°〜７５°の範囲であることが好ましく、一般的な凝集フロックの安息角である６０°がより好ましい。   In the levitation separation apparatus, the slope angle of the slope portion is preferably in the range of 45 ° to 75 °, and more preferably 60 °, which is a repose angle of a general aggregated floc.

また、前記浮上分離装置において、前記整流部は、複数の分割セルにより構成され、前記分割セルは、少なくとも１つ以上の前記整流孔を有することが好ましい。   In the levitation separation apparatus, it is preferable that the rectifying unit includes a plurality of divided cells, and the divided cells include at least one rectifying hole.

また、前記浮上分離装置において、前記上部開口部の面積に対する前記下部開口部の面積は、２〜１０％の範囲であることが好ましい。   In the floating separation apparatus, the area of the lower opening relative to the area of the upper opening is preferably in the range of 2 to 10%.

また、前記浮上分離装置において、前記浮上槽は矩形状でも、その他五角形以上の多角形状でもよいが、円筒状であることが好ましい。   In the levitation separation apparatus, the levitation tank may have a rectangular shape or a polygonal shape other than a pentagon, but is preferably cylindrical.

また、本発明は、被処理水中の被処理物質に気泡を付着させ、被処理物質を浮上物として分離する浮上分離装置の浮上槽を垂直方向上部及び下部に区画する整流装置であって、前記整流装置は、処理水を通水させる複数の整流孔を備え、前記整流孔は、上部開口部と、前記上部開口部の面積より小さい下部開口部と、前記上部開口部から前記下部開口部に至るスロープ部と、を有する。   Further, the present invention is a rectifier that divides a levitation tank of a levitation separator that separates a substance to be treated as a levitated substance into upper and lower parts in the vertical direction by attaching bubbles to the substance to be treated in the treatment water. The rectifying device includes a plurality of rectifying holes through which treated water flows, and the rectifying holes include an upper opening, a lower opening smaller than an area of the upper opening, and the upper opening to the lower opening. And a slope portion to reach.

また、前記整流装置において、前記整流装置は、複数の分割セルにより構成され、前記分割セルは、少なくとも１つ以上の前記整流孔を有することが好ましい。   Moreover, in the rectifier, the rectifier is preferably composed of a plurality of divided cells, and the divided cells preferably include at least one rectifying hole.

また、本発明は、被処理水中の被処理物質に気泡を付着させ、被処理物質を浮上物として分離する浮上分離装置の浮上槽を垂直方向上部及び下部に区画する整流装置を構成する整流装置用分割セルであって、前記整流装置用分割セルは、処理水を通水させる整流孔を少なくとも１つ以上備え、前記整流孔は、上部開口部と、前記上部開口部の面積より小さい下部開口部と、前記上部開口部から前記下部開口部に至るスロープ部と、を有する。   The present invention also relates to a rectifier that constitutes a rectifier that divides a levitation tank of a levitation separator that vertically separates a substance to be treated as a levitated substance by separating bubbles into the substance to be treated in the treatment water. The dividing cell for rectifier includes at least one rectifying hole for allowing treated water to flow, and the rectifying hole has an upper opening and a lower opening smaller than an area of the upper opening. And a slope portion extending from the upper opening to the lower opening.

本発明の浮上分離装置によれば、整流部上への沈殿物の堆積を抑制し、装置の連続運転による処理水の水質悪化を抑制することができる。   According to the flotation separation apparatus of the present invention, it is possible to suppress sediment accumulation on the rectification unit and to suppress deterioration of the quality of treated water due to continuous operation of the apparatus.

本発明の実施の形態について以下説明する。本実施形態は本発明を実施する一例であって、本発明は本実施形態に限定されるものではない。   Embodiments of the present invention will be described below. This embodiment is an example for carrying out the present invention, and the present invention is not limited to this embodiment.

図１は、本実施形態に係る浮上分離装置の構成の一例を示す模式断面図である。図１に示す浮上分離装置１は、浮上槽１０、流入部１２、排出部１４、整流部２２（整流装置）を備える。   FIG. 1 is a schematic cross-sectional view showing an example of the configuration of the levitation separation apparatus according to the present embodiment. A levitation separation apparatus 1 shown in FIG. 1 includes a levitation tank 10, an inflow section 12, a discharge section 14, and a rectification section 22 (rectification apparatus).

図１に示す浮上槽１０の周壁１０ａは円筒形とされ、浮上槽１０の底部１０ｂは中央に向かって低位となるホッパ状とされている。また、底部１０ｂの中央には、被処理物質のうちの沈殿物を溜めるピット１８が設けられている。ピット１８には、不図示の沈殿物排出口が設けられ、沈殿物排出管１９が接続されている。浮上槽１０の周壁１０ａは、矩形とされてもよい。しかし、浮上槽１０の周壁１０ａを円筒形とすることにより、浮上槽１０の中心部に配置される流入部１２の開口部（開口部については後述する）から周壁１０ａまで、被処理水が拡がりながら流れることになる。従って、流入部１２から出るときの流速は比較的速いが、周壁１０ａに当たる際の表面部の流れは比較的遅くなる。その結果、周壁１０ａのある一部分で急速な下降流が生じることもないため、浮上分離処理のために浮上槽全体を有効に活用することができ、処理能力を向上させることができる。   The peripheral wall 10a of the levitation tank 10 shown in FIG. 1 has a cylindrical shape, and the bottom 10b of the levitation tank 10 has a hopper shape that becomes lower toward the center. A pit 18 is provided at the center of the bottom portion 10b to collect a deposit of the material to be treated. The pit 18 is provided with a sediment discharge port (not shown), and a sediment discharge pipe 19 is connected thereto. The peripheral wall 10a of the floating tank 10 may be rectangular. However, by forming the peripheral wall 10a of the levitation tank 10 into a cylindrical shape, the water to be treated spreads from the opening portion (the opening portion will be described later) of the inflow portion 12 disposed at the center of the levitation tank 10 to the peripheral wall 10a. It will flow while. Therefore, although the flow velocity when exiting the inflow portion 12 is relatively fast, the flow of the surface portion when hitting the peripheral wall 10a is relatively slow. As a result, since a rapid downward flow does not occur in a part of the peripheral wall 10a, the entire levitation tank can be effectively used for the levitation separation process, and the processing capacity can be improved.

浮上槽１０には、集水部１０ｃが設けられている。集水部１０ｃは、被処理物質を除去した処理水を後述する浮上槽１０の下部２０ｂから集水するものであり、浮上槽１０の下部２０ｂ側、すなわち整流部２２より垂直方向下方に配置される。   The floating tank 10 is provided with a water collecting part 10c. The water collection unit 10c collects treated water from which the substance to be treated has been removed from the lower part 20b of the floating tank 10 described later, and is disposed on the lower part 20b side of the floating tank 10, that is, below the rectifying unit 22 in the vertical direction. The

また、浮上槽１０には、被処理物質のうち、液面に浮上した浮上物２３（いわゆるスカム）を排出するための浮上物ポット２４が設けられている。なお、通常の場合、浮上槽１０の表面上に浮上物２３を掻き寄せるスキマーが設けられており、浮上物２３を浮上物ポット２４に掻き寄せる。また、浮上物ポット２４は、掻き寄せられてくる浮上物２３が水面上から浮上物ポット２４内に落下するように、その浮上槽１０側の境界部分に水面下から水面上に至るスロープを有することが好適である。   The levitation tank 10 is provided with a levitation object pot 24 for discharging the levitation material 23 (so-called scum) that has floated on the liquid surface among the substances to be treated. In a normal case, a skimmer for scraping the levitated object 23 is provided on the surface of the levitating tank 10, and the levitated object 23 is scraped to the levitated object pot 24. Further, the levitated pot 24 has a slope extending from the lower surface to the upper surface of the water at the boundary portion of the levitating tank 10 side so that the levitated object 23 that is scraped down falls into the levitated pot 24 from the water surface. Is preferred.

浮上槽１０内には、浮上槽１０を垂直方向の上部２０ａ及び下部２０ｂに区画する整流部２２が設けられている。そして、整流部２２には、処理水を通水させる複数の整流孔２２ａが形成されている。図２は、本実施形態で用いられる整流部の構成の一例を示す模式上面図である。図３は、図２のＡ−Ａ線における整流部の構成の一例を示す模式断面図である。本実施形態では、整流孔２２ａ（図３では、整流孔２２ａを斜線部で表している）は、浮上槽１０の上部２０ａ側に開口した上部開口部２５ａと、浮上槽１０の下部２０ｂ側に開口した下部開口部２５ｂと、上部開口部２５ａから下部開口部２５ｂに至るスロープ部２５ｃとを有している。   In the levitation tank 10, a rectification unit 22 is provided that partitions the levitation tank 10 into an upper part 20a and a lower part 20b in the vertical direction. And in the rectification | straightening part 22, the some rectification | straightening hole 22a which lets treated water flow is formed. FIG. 2 is a schematic top view illustrating an example of the configuration of the rectifying unit used in the present embodiment. FIG. 3 is a schematic cross-sectional view illustrating an example of the configuration of the rectifying unit along line AA in FIG. 2. In the present embodiment, the rectifying hole 22a (in FIG. 3, the rectifying hole 22a is indicated by a hatched portion) is provided on the upper opening 25a opened on the upper part 20a side of the floating tank 10 and on the lower part 20b side of the floating tank 10. It has an opened lower opening 25b and a slope portion 25c extending from the upper opening 25a to the lower opening 25b.

通常、浮上槽１０の上部２０ａにおいて気泡が付着しても浮上することができない比重の重い被処理物質や、気泡が十分付着しなかった被処理物質の一部は、整流部２２上へ堆積する。しかし、本実施形態では、下部開口部２５ｂより面積の大きい上部開口部２５ａ及びスロープ部２５ｃにより、沈殿物を下部開口部２５ｂ側へ排出され易い構造となっている。そのため、沈殿物は、整流部２２上及び整流孔２２ａ内にはほとんど堆積しない。また、図３に示すように、整流孔２２ａ同士は、上部開口部２５ａ同士が隣接するように配列されることが好ましい。上記構成により、上部開口部２５ａ間に隙間がなくなるため、沈殿物が整流部２２上に堆積することを効果的に抑制することができる。上部開口部２５ａの形状は特に制限されるものではないが、上部開口部２５ａを隙間なく隣接させることが出来る点で、正方形等の多角形状であることが好ましい。   Usually, a heavy material to be treated that cannot float even if bubbles are attached to the upper part 20a of the levitation tank 10, or a part of the material to be treated that is not sufficiently attached with bubbles is deposited on the rectifying unit 22. . However, in the present embodiment, the structure is such that sediment is easily discharged to the lower opening 25b side by the upper opening 25a and the slope 25c having a larger area than the lower opening 25b. Therefore, the deposit is hardly deposited on the rectifying unit 22 and in the rectifying hole 22a. Further, as shown in FIG. 3, the rectifying holes 22a are preferably arranged so that the upper openings 25a are adjacent to each other. With the above configuration, since there is no gap between the upper openings 25a, it is possible to effectively suppress deposits from being deposited on the rectifying unit 22. The shape of the upper opening 25a is not particularly limited, but is preferably a polygonal shape such as a square in that the upper opening 25a can be adjacent to each other without a gap.

図３に示すように、スロープ部２５ｃは、上部開口部２５ａから下部開口部２５ｂへ徐々に傾斜するような構成、すなわち上部開口部２５ａから下部開口部２５ｂに向かって整流孔２２ａ内の水平断面積が徐々に縮小されるように構成されている。しかし、スロープ部２５ｃの形状は、沈殿物を下部開口部２５ｂ側へ排出し易い形状であれば、上記に制限されるものではない。図４は、図２のＡ−Ａ線における整流部の構成の他の一例を示す模式断面図である。例えば、図４に示すように、スロープ部２５ｃが、上部開口部２５ａから下方所定位置までは徐々に傾斜するように構成され、当該所定位置から下部開口部２５ｂまでは垂直面とする構成、すなわち、上部開口部２５ａから下方所定位置までは、整流孔２２ａ内の水平断面積が徐々に縮小されるように構成されて、当該所定位置から下部開口部２５ｂまでは整流孔２２ａ内の水平断面積が同一となるように構成されているものであってもよい。   As shown in FIG. 3, the slope portion 25c is configured to gradually incline from the upper opening portion 25a to the lower opening portion 25b, that is, the horizontal section in the rectifying hole 22a from the upper opening portion 25a toward the lower opening portion 25b. The area is gradually reduced. However, the shape of the slope portion 25c is not limited to the above as long as it is a shape that easily discharges sediment to the lower opening portion 25b side. FIG. 4 is a schematic cross-sectional view showing another example of the configuration of the rectifying unit along line AA in FIG. For example, as shown in FIG. 4, the slope portion 25c is configured to gradually incline from the upper opening 25a to a predetermined position below, and is configured to be a vertical surface from the predetermined position to the lower opening 25b. The horizontal cross-sectional area in the rectifying hole 22a is gradually reduced from the upper opening 25a to a predetermined position below, and the horizontal cross-sectional area in the rectifying hole 22a is reduced from the predetermined position to the lower opening 25b. May be configured to be the same.

スロープ部２５ｃの傾斜角（θ）は、４５°〜７５°の範囲であることが好ましく、より好ましくは６０°の範囲である。スロープ部２５ｃの傾斜角が４５°より小さいと、沈殿物がスロープ部２５ｃ上に堆積する場合がある。また、スロープ部２５ｃの傾斜角が７５°より大きいと、整流部２２の強度を充分に確保することができない場合がある。   The slope angle (θ) of the slope portion 25c is preferably in the range of 45 ° to 75 °, more preferably in the range of 60 °. If the inclination angle of the slope portion 25c is smaller than 45 °, precipitates may be deposited on the slope portion 25c. Moreover, when the inclination angle of the slope portion 25c is larger than 75 °, the strength of the rectifying portion 22 may not be sufficiently secured.

整流部２２は、樹脂材料等から構成される板に、上記説明した整流孔２２ａを形成した一体構造であってもよいが、異なるサイズの浮上槽に対して、本実施形態の整流部２２を容易に設置することができる点で、整流部２２は、樹脂材料等から構成される複数の分割セル（整流装置用分割セル）により構成されていることが好ましい。図５（Ａ）〜（Ｃ）は、分割セルの構成を示す模式斜視図である。図５（Ａ）〜（Ｃ）に示すように、分割セル２７には、少なくとも上記説明した整流孔２２ａが少なくとも１つ以上形成されている。当該分割セル２７を浮上槽１０のサイズに合うように組み合わせることによって、整流部２２が形成される。一体構造の整流部２２又は分割セル２７により構成される整流部２２は、不図示のフレーム、架台等により浮上槽１０の周壁１０ａ等に固定される。   The rectifying unit 22 may be an integrated structure in which the rectifying hole 22a described above is formed on a plate made of a resin material or the like, but the rectifying unit 22 of the present embodiment is used for a floating tank of a different size. In terms of easy installation, the rectifying unit 22 is preferably configured by a plurality of divided cells (divided cells for a rectifier) made of a resin material or the like. 5A to 5C are schematic perspective views showing the configuration of the divided cells. As shown in FIGS. 5A to 5C, at least one rectifying hole 22 a described above is formed in the divided cell 27. The rectification unit 22 is formed by combining the divided cells 27 so as to fit the size of the floating tank 10. The rectifying unit 22 including the rectifying unit 22 or the divided cell 27 having an integral structure is fixed to the peripheral wall 10a of the levitation tank 10 by a frame, a gantry, or the like (not shown).

本実施形態では、上部開口部２５ａの面積に対する下部開口部２５ｂの面積（以下、開口面積率と呼ぶ場合がある）は、２〜１０％の範囲とすることが好ましい。開口面積率が２％より低いと、整流孔２２ａを流れる処理水の流速が速くなり、処理水と共に沈殿物が集水部１０ｃ側に流れ込み易くなり、処理水の水質を悪化させる場合がある。また、装置を流れる処理水の損失水頭が上昇するため、その分、浮上槽１０の水位を上げる必要があり、装置が大型化してしまう。また、開口面積率が１０％より大きいと、整流部２２の整流効果が充分に発揮されない場合がある。   In the present embodiment, the area of the lower opening 25b relative to the area of the upper opening 25a (hereinafter sometimes referred to as an opening area ratio) is preferably in the range of 2 to 10%. When the opening area ratio is lower than 2%, the flow rate of the treated water flowing through the rectifying hole 22a is increased, and the precipitate is likely to flow into the water collecting portion 10c together with the treated water, which may deteriorate the quality of the treated water. Moreover, since the loss head of the treated water flowing through the apparatus rises, it is necessary to raise the water level of the levitation tank 10 correspondingly, and the apparatus becomes large. Further, if the opening area ratio is larger than 10%, the rectifying effect of the rectifying unit 22 may not be sufficiently exhibited.

流入部１２は、ガイド筒２６と、ガイド筒２６内に設けられる導入管２８と有する。導入管２８には、被処理水流入管３０が接続され、導入管２８は浮上槽１０の底部１０ｂの中央に形成されたピット１８から浮上槽１０内に延設されている。被処理水流入管３０には加圧水流入管３２が接続されている。浮上槽１０内に設けられるガイド筒２６は、底部１０ｂや、周壁１０ａにフレームなどで固定される。また、ガイド筒２６を上方から吊り下げてもよい。ガイド筒２６を設けることにより、導入管２８から供給される被処理水及び加圧水を浮上槽１０の中央部分から均一に流入させることができる。   The inflow portion 12 includes a guide tube 26 and an introduction pipe 28 provided in the guide tube 26. A treated water inflow pipe 30 is connected to the introduction pipe 28, and the introduction pipe 28 extends from the pit 18 formed in the center of the bottom 10 b of the levitation tank 10 into the levitation tank 10. A pressurized water inflow pipe 32 is connected to the treated water inflow pipe 30. The guide tube 26 provided in the floating tank 10 is fixed to the bottom 10b and the peripheral wall 10a with a frame or the like. The guide tube 26 may be suspended from above. By providing the guide tube 26, the water to be treated and the pressurized water supplied from the introduction pipe 28 can be uniformly introduced from the central portion of the levitation tank 10.

本実施形態の流入部１２は、浮上槽１０の上部２０ａで開口しており、当該開口部から浮上槽１０の上部２０ａに（加圧水を混合させた）被処理水を供給させる。ここで、本実施形態のように流入部１２が、ガイド筒２６と導入管２８から構成されている場合、少なくともガイド筒２６の開口部２６ａが上部２０ａで開口していればよい。本実施形態の流入部１２は、必ずしもガイド筒２６を備える必要はない。例えば、流入部１２が導入管２８のみから構成されていてもよい。この場合、導入管２８の開口部２８ａが上部２０ａで開口している必要がある。特に、被処理水は、浮上槽１０の上部２０ａの中心部に流入させることが好ましく、例えば、浮上槽１０の上部２０ａの水平断面における中心から周壁１０ａまでの距離に対し、中心から１／３以内の領域に流入させることが好ましい。   The inflow part 12 of this embodiment is opened at the upper part 20a of the levitation tank 10, and the treated water (mixed with pressurized water) is supplied from the opening part to the upper part 20a of the levitation tank 10. Here, when the inflow part 12 is comprised from the guide cylinder 26 and the introductory tube 28 like this embodiment, the opening part 26a of the guide cylinder 26 should just open at the upper part 20a. The inflow portion 12 of this embodiment does not necessarily need to include the guide tube 26. For example, the inflow portion 12 may be composed only of the introduction pipe 28. In this case, the opening portion 28a of the introduction pipe 28 needs to be opened at the upper portion 20a. In particular, the water to be treated is preferably allowed to flow into the center of the upper part 20a of the levitation tank 10, for example, 1/3 from the center with respect to the distance from the center to the peripheral wall 10a in the horizontal section of the upper part 20a of the levitation tank 10. It is preferable to flow into the area within.

流入部１２の開口部（図１ではガイド筒２６の開口部２６ａ）の位置は、浮上槽１０の上部２０ａ、すなわち整流部２２より垂直方向上方であれば特に制限されるものではない。しかし、流入部１２の開口部の位置が液面付近にあると、流入部１２の開口部から供給される被処理水が液面に噴き上げて、液面を乱し、液面に浮上した浮上物２３の再沈降を招く虞がある。   The position of the opening portion of the inflow portion 12 (in FIG. 1, the opening portion 26a of the guide tube 26) is not particularly limited as long as it is vertically above the upper portion 20a of the floating tank 10, that is, the rectifying portion 22. However, if the position of the opening of the inflow portion 12 is near the liquid level, the water to be treated supplied from the opening of the inflow portion 12 spouts up to the liquid surface, disturbs the liquid surface, and floats to the liquid surface. There is a risk of re-sedimentation of the object 23.

排出部１４は、処理水取出管３８、水位調整槽４０、処理水排出管４２を備える。処理水取出管３８の一端は、浮上槽１０に設けられた集水部１０ｃに接続されており、処理水取出管３８の他端は、水位調整槽４０の入口に接続されている。また、水位調整槽４０の出口には処理水排出管４２が接続されている。   The discharge unit 14 includes a treated water extraction pipe 38, a water level adjustment tank 40, and a treated water discharge pipe 42. One end of the treated water outlet pipe 38 is connected to a water collecting part 10 c provided in the floating tank 10, and the other end of the treated water outlet pipe 38 is connected to the inlet of the water level adjusting tank 40. A treated water discharge pipe 42 is connected to the outlet of the water level adjustment tank 40.

次に、本実施形態に係る浮上分離装置による運転方法の一例を説明する。まず、被処理水流入管３０から被処理水を流入させると共に、加圧水流入管３２から高圧下で気体を溶解させた加圧水を流入させる。加圧水は、処理水の一部を空気溶解タンクに導入し、ここにおいて高圧下で空気を溶解させて生成する。   Next, an example of the operation method by the levitation separator according to the present embodiment will be described. First, the water to be treated is caused to flow from the water to be treated inflow pipe 30 and the pressurized water in which the gas is dissolved from the pressure water inflow pipe 32 under high pressure. Pressurized water is generated by introducing a part of treated water into an air dissolution tank and dissolving the air under high pressure.

加圧水流入管３２を通る加圧水は、被処理水流入管３０を通る被処理水に混合される。被処理水及び加圧水からなる混合液は被処理水流入管３０から、導入管２８に供給される。被処理水及び加圧水は導入管２８を介し、導入管２８の開口部２８ａからガイド筒２６内に供給される。ガイド筒２６内に供給された（浮上槽１０の液面に向かって上昇する）被処理水及び加圧水は、ガイド筒２６の開口部２６ａから浮上槽１０の上部２０ａに流入する。浮上槽１０の上部２０ａ（及びガイド筒２６内）は、大気圧状態であるため、加圧水に溶解していた気体が気泡として析出し、被処理水中の被処理物質（ＳＳ成分、油分等）に付着し、被処理物質が浮上分離される。このようにして浮上した被処理物質（浮上物２３）は、浮上物ポット２４に収集される。浮上物２３の収集は、通常、後述する浮上物スキマーによって行われるが、その他の方法によって行われてもよい。浮上物ポット２４に収集された浮上物２３は、浮上物ポット２４の排出口に接続された浮上物排出管４４から排出される。気泡の発生方法としては、上記のように加圧水を用いる方法に制限されるものではなく、その他に、例えば、界面活性剤等の気泡発生剤を被処理水に添加する方法等であってもよい。また、被処理水自体を空気溶解タンクに導入し、ここで被処理水に直接空気を溶解する全量加圧方式を採用してもよい。   The pressurized water that passes through the pressurized water inflow pipe 32 is mixed with the treated water that passes through the treated water inflow pipe 30. A mixed liquid composed of water to be treated and pressurized water is supplied from the water to be treated inflow pipe 30 to the introduction pipe 28. The water to be treated and the pressurized water are supplied into the guide tube 26 from the opening 28 a of the introduction pipe 28 through the introduction pipe 28. Water to be treated and pressurized water supplied into the guide cylinder 26 (rising toward the liquid level of the levitation tank 10) flow into the upper part 20 a of the levitation tank 10 from the opening 26 a of the guide cylinder 26. Since the upper part 20a of the levitation tank 10 (and the inside of the guide cylinder 26) is in an atmospheric pressure state, the gas dissolved in the pressurized water is precipitated as bubbles, and becomes a substance to be treated (SS component, oil, etc.) in the treated water. It adheres and the material to be treated floats and is separated. The material to be treated (the levitated material 23) that has floated in this manner is collected in the levitated material pot 24. The collection of the floating object 23 is normally performed by a floating object skimmer described later, but may be performed by other methods. The float 23 collected in the float pot 24 is discharged from the float discharge pipe 44 connected to the discharge port of the float pot 24. The method of generating bubbles is not limited to the method using pressurized water as described above, but may be a method of adding a bubble generating agent such as a surfactant to the water to be treated. . Alternatively, a whole-pressure method may be employed in which the water to be treated itself is introduced into an air dissolution tank and air is directly dissolved in the water to be treated.

ガイド筒２６の開口部２６ａから浮上槽１０の上部２０ａに供給された被処理水が、浮上槽１０の周壁１０ａに達すると、周壁１０ａに沿って流れる下降流となる。そこで、本実施形態では、ガイド筒２６の開口部２６ａが浮上槽１０の上部２０ａの中心部において垂直方向上方に開口するとともに、浮上槽１０の周壁１０ａを円筒状にすることが好ましい。上記構成によって、図２に示すように被処理水は放射状に拡がりながら流れる分散流れとなって、浮上槽１０の周壁１０ａに達する。その結果、開口部２６ａから供給された被処理水の流れは、浮上槽１０の周壁１０ａに到達するまでに緩やかになり、周壁１０ａに沿って流れる被処理水の下降流も緩やかになる。したがって、急速な下降流によって生じる処理水の水質の悪化は抑制される。   When the water to be treated supplied from the opening 26a of the guide tube 26 to the upper portion 20a of the levitation tank 10 reaches the peripheral wall 10a of the levitation tank 10, a downward flow flows along the peripheral wall 10a. Therefore, in the present embodiment, it is preferable that the opening 26a of the guide cylinder 26 opens vertically upward at the center of the upper portion 20a of the levitation tank 10, and the peripheral wall 10a of the levitation tank 10 is cylindrical. With the above configuration, the water to be treated becomes a dispersed flow that spreads radially and reaches the peripheral wall 10a of the levitation tank 10 as shown in FIG. As a result, the flow of the water to be treated supplied from the opening 26a becomes gentle before reaching the peripheral wall 10a of the levitation tank 10, and the downward flow of the water to be treated flowing along the peripheral wall 10a also becomes gentle. Therefore, deterioration of the quality of the treated water caused by the rapid downward flow is suppressed.

ここで、流入部１２の開口部（図１ではガイド筒２６の開口部２６ａ）の形状は特に制限されるものではないが、流入部１２の開口部から供給される被処理水が放射状に分散し易くなる点で、その上部において上方に向けてテーパ状に広がっていることが好ましい。また、流入部１２の開口部の水平断面積は、特に制限されるものではないが、流入部１２を流れる被処理水の流速を適切に制御することができる点で、好ましくは浮上槽１０の水平断面積の１／３０〜１／３の範囲、より好ましくは浮上槽１０の水平断面積の１／２０〜１／８の範囲とするのがよい。流入部１２の開口部の水平断面積が浮上槽１０の水平断面積の１／３０より小さいと、流入部１２から出る際の被処理水の流速が速くなるため、被処理水は浮上槽１０の表層部を流れ、開口部から浮上槽１０の周壁１０ａに向かって流れる被処理水の流速も速くなり、浮上槽１０の液面に乱れが生じやすく、液面に浮上した浮上物２３の再沈降を招く虞がある。また、浮上槽１０の周壁１０ａに沿って流れる被処理水の下降流も速くなるため、整流部２２の全体を有効に利用することができず、その整流効果が減少し、処理水の水質が悪化する可能性がある。また、流入部１２の開口部の水平断面積が浮上槽１０の水平断面積の１／３より大きいと、浮上槽１０の面積を確保することが難しくなり、浮上槽１０の水面積負荷が大きくなり、効率的な浮上処理が行えなくなる。   Here, the shape of the opening of the inflow portion 12 (in FIG. 1, the opening 26a of the guide tube 26) is not particularly limited, but the water to be treated supplied from the opening of the inflow portion 12 is dispersed radially. From the viewpoint of facilitating this, it is preferable that the upper portion of the upper portion spreads in a tapered shape. In addition, the horizontal cross-sectional area of the opening of the inflow portion 12 is not particularly limited, but it is preferable that the flow rate of the water to be treated flowing through the inflow portion 12 can be appropriately controlled. It is good to set it as the range of 1/20 to 1/8 of the horizontal cross-sectional area of the horizontal cross-sectional area of the horizontal cross-sectional area of the horizontal tank of the floating tank 10, More preferably. If the horizontal cross-sectional area of the opening of the inflow portion 12 is smaller than 1/30 of the horizontal cross-sectional area of the levitation tank 10, the flow rate of the water to be treated when exiting the inflow portion 12 is increased. The flow rate of the water to be treated flowing from the opening toward the peripheral wall 10a of the levitation tank 10 is increased, the liquid surface of the levitation tank 10 is likely to be disturbed, and the floating object 23 that has floated to the liquid surface is regenerated. There is a risk of causing sedimentation. Moreover, since the downflow of the to-be-processed water which flows along the surrounding wall 10a of the levitation tank 10 also becomes quick, the whole rectification | straightening part 22 cannot be utilized effectively, the rectification effect reduces, and the quality of the treated water is reduced. It can get worse. Moreover, when the horizontal cross-sectional area of the opening part of the inflow part 12 is larger than 1/3 of the horizontal cross-sectional area of the levitation tank 10, it becomes difficult to ensure the area of the levitation tank 10, and the water area load of the levitation tank 10 is large. Therefore, efficient levitation processing cannot be performed.

浮上槽１０の上部２０ａにおいて、被処理物質が除去された処理水は、整流部２２に設けた整流孔２２ａを通り、浮上槽１０の下部２０ｂに供給される。整流部２２の下部開口部２５ｂにより、上部２０ａから下部２０ｂへ流れる処理水の流れは整流される。すなわち、上部２０ａから下部２０ｂへ流れる処理水の流速は、整流部２２の整流効果により、どの場所でもほぼ均一とされる。その結果、浮上槽１０の上部２０ａ全体を浮上分離処理に使用することが可能となり、効率的に気泡を被処理物質に付着させることができるため、処理能力を向上させることができる。   In the upper part 20 a of the levitation tank 10, the treated water from which the substance to be treated has been removed passes through the rectification holes 22 a provided in the rectification unit 22 and is supplied to the lower part 20 b of the levitation tank 10. The flow of the treated water flowing from the upper part 20a to the lower part 20b is rectified by the lower opening 25b of the rectifying part 22. That is, the flow rate of the treated water flowing from the upper part 20a to the lower part 20b is made almost uniform everywhere due to the rectifying effect of the rectifying unit 22. As a result, the entire upper part 20a of the levitation tank 10 can be used for the levitation separation process, and bubbles can be efficiently attached to the material to be treated, so that the processing capacity can be improved.

また、上記でも説明したように、通常、気泡が付着しても浮上することができない比重の重い被処理物質や、気泡が十分付着しなかった被処理物質の一部は、整流部２２上に堆積する。しかし、本実施形態の整流部２２は、下部開口部２５ｂより面積の大きい上部開口部２５ａ（上部開口部２５ａ同士が隣接していることが好ましい）及び上部開口部２５ａから下部開口部２５ｂに至るスロープ部２５ｃが形成されているため、整流部２２上、整流孔２２ａ内には、沈殿物がほとんど堆積しない。その結果装置の連続運転による処理水の水質悪化を抑制することができるため、処理水の有効利用や環境水としての放流が可能となる。   In addition, as described above, normally, a material to be processed having a high specific gravity that cannot float even if bubbles are attached, or a part of a material to be processed to which bubbles are not sufficiently attached are placed on the rectifying unit 22. accumulate. However, the rectifying unit 22 according to the present embodiment extends from the upper opening 25a (the upper openings 25a are preferably adjacent to each other) having a larger area than the lower opening 25b and the upper opening 25a to the lower opening 25b. Since the slope portion 25c is formed, the deposit is hardly deposited on the rectifying portion 22 and in the rectifying hole 22a. As a result, the deterioration of the quality of the treated water due to the continuous operation of the apparatus can be suppressed, so that the treated water can be effectively used and discharged as environmental water.

整流部２２に形成された整流孔２２ａを通って、浮上槽１０の下部２０ｂに供給された処理水は、浮上槽１０の集水部１０ｃから処理水取出管３８を通り、水位調整槽４０に供給される。水位調整槽４０には可動堰４１が設けられている。この可動堰４１の高さを調整することで、浮上槽１０における水位を調整でき、浮上槽１０の水位が浮上物２３の浮上物ポット２４への排出に適した水位に調整される。そして、処理水が水位調整槽４０の出口から処理水排出管４２へ排出される。なお、可動堰４１を間欠的に上昇させ、これによって浮上槽１０内の浮上物２３を浮上物ポット２４へオーバーフローさせることも可能である。   The treated water supplied to the lower part 20b of the levitation tank 10 through the rectifying hole 22a formed in the rectifying part 22 passes through the treated water outlet pipe 38 from the water collecting part 10c of the levitation tank 10 to the water level adjusting tank 40. Supplied. A movable weir 41 is provided in the water level adjustment tank 40. By adjusting the height of the movable weir 41, the water level in the levitation tank 10 can be adjusted, and the water level in the levitation tank 10 is adjusted to a water level suitable for discharging the float 23 to the float pot 24. Then, the treated water is discharged from the outlet of the water level adjustment tank 40 to the treated water discharge pipe 42. In addition, it is also possible to raise the movable weir 41 intermittently and thereby overflow the floating material 23 in the floating tank 10 to the floating material pot 24.

図６は、本発明の他の実施形態に係る浮上分離装置の構成の一例を示す模式断面図である。図６に示す浮上分離装置２は、図１に示す浮上分離装置１に浮上物スキマー５０、沈殿物掻き寄せ機５２を設けたものである。図６に示す浮上分離装置２において、図１に示す浮上分離装置１と同様の構成については、同一の符合を付し、その説明を省略する。   FIG. 6 is a schematic cross-sectional view showing an example of the configuration of a levitation separator according to another embodiment of the present invention. A levitation separation apparatus 2 shown in FIG. 6 is obtained by providing a levitation skimmer 50 and a sediment scraper 52 in the levitation separation apparatus 1 shown in FIG. In the levitation separator 2 shown in FIG. 6, the same components as those in the levitation separator 1 shown in FIG.

浮上物スキマー５０は、液面に浮上した浮上物２３を掻き寄せるためのものである。浮上物スキマー５０は、モータ５４のシャフトに固定されている。モータ５４が駆動することにより、浮上物スキマー５０が回転され、液面に浮上した浮上物２３が掻き寄せられる。浮上物スキマー５０は、羽根、螺旋羽根等のスクレーパー部を有しており、水面の流れ及びスクレーパー部の移動により浮上物２３が半径方向外側に移動させられ、浮上槽１０に設けられた浮上物ポット２４に集められ、浮上物排出管４４から排出される。浮上物スキマー５０を設けることにより、浮上物２３を効率的に排出することができるため、処理水の水質悪化を抑制することができる。   The levitated skimmer 50 is for scraping the levitated matter 23 that has levitated to the liquid surface. The levitated skimmer 50 is fixed to the shaft of the motor 54. When the motor 54 is driven, the levitated skimmer 50 is rotated, and the levitated object 23 that has levitated to the liquid surface is scraped. The levitated skimmer 50 has scraper portions such as blades and spiral vanes, and the levitated matter 23 is moved radially outward by the flow of the water surface and the movement of the scraper portion, and the levitated matter provided in the levitating tank 10. They are collected in the pot 24 and discharged from the floating material discharge pipe 44. By providing the levitated skimmer 50, the levitated matter 23 can be discharged efficiently, so that deterioration of the quality of the treated water can be suppressed.

沈殿物掻き寄せ機５２は、浮上槽１０の底部１０ｂに沈殿した沈殿物を掻き寄せるためのものである。沈殿物掻き寄せ機５２はガイド筒２６に取り付けられると共に、支持体５６により沈殿物掻き寄せ機５２の角度調整、補強がなされている。そして、ガイド筒２６は、モータ５４のシャフトに取り付けられ、モータ５４の駆動により回転される。すなわち、沈殿物掻き寄せ機５２はモータ５４の駆動により、ガイド筒２６と一体に回転される。沈殿物掻き寄せ機５２が回転することにより、浮上槽１０の底部１０ｂに沈殿した沈殿物が掻き寄せられ、浮上槽１０のピット１８に集められ、沈殿物排出管１９から排出される。なお、この沈殿物掻き寄せ機５２も、羽根、螺旋羽根等のスクレーパー部を有しており、このスクレーパー部によって内側方向に沈殿物を掻き寄せる。   The sediment scraper 52 is for scraping the sediment deposited on the bottom 10 b of the floating tank 10. The sediment scraper 52 is attached to the guide tube 26, and the angle of the sediment scraper 52 is reinforced by a support 56. The guide cylinder 26 is attached to the shaft of the motor 54 and is rotated by driving the motor 54. That is, the sediment scraper 52 is rotated integrally with the guide cylinder 26 by the drive of the motor 54. As the sediment scraper 52 rotates, the sediment deposited on the bottom 10 b of the floating tank 10 is scraped, collected in the pit 18 of the floating tank 10, and discharged from the sediment discharge pipe 19. In addition, this sediment scraper 52 also has scraper parts, such as a blade | wing and a spiral blade, and scrapes a sediment inside by this scraper part.

ここで、従来は、沈殿物を清掃するため定期的なメンテナンスが必要であったが、沈殿物掻き寄せ機５２を設けることにより、沈殿物を効率的に排出することができるため、メンテナンス回数を減らし、装置の長期連続運転が可能となる。   Here, in the past, regular maintenance was required to clean the sediment. However, by providing the sediment scraper 52, the sediment can be efficiently discharged, so the number of maintenance times is reduced. The system can be operated continuously for a long time.

なお、整流部２２上に沈殿する沈殿物を掻き取り、整流部２２の整流孔２２ａから下方に落下排出させる整流部スクレーパーを設けてもよいが、上記でも説明したように、本実施形態の整流部２２上には、ほとんど沈殿物が堆積しないため、必ずしも整流部スクレーパーを備える必要はない。   Note that a rectifying unit scraper that scrapes the sediment precipitated on the rectifying unit 22 and drops and discharges it downward from the rectifying hole 22a of the rectifying unit 22 may be provided. However, as described above, the rectifying unit of this embodiment is also provided. Since almost no sediment is deposited on the part 22, it is not always necessary to provide a rectifying part scraper.

以下、実施例および比較例を挙げ、本発明をより具体的に詳細に説明するが、本発明は、以下の実施例に限定されるものではない。   Hereinafter, although an example and a comparative example are given and the present invention is explained more concretely in detail, the present invention is not limited to the following examples.

図６の浮上分離装置２を用い、下記の条件で被処理水の浮上分離処理を行い、浮上分離後の処理水の濁度を測定した。実施例で用いた整流部２２は、図３に示すように、上部開口部２５ａと上部開口部２５ａの面積より小さい下部開口部２５ｂと、上部開口部２５ａから下部開口部２５ｂに至るスロープ部２５ｃとを有する整流孔２２ａを有し、整流孔２２ａ同士は、上部開口部２５ａ同士が隣接するように配列されているものである。整流部２２の厚さは７．４ｃｍ、径は１６０ｃｍ、整流孔２２ａの開口面積率は６．２５％（上部開口部２５ａの面積が６４ｃｍ２、下部開口部２５ｂの面積が４ｃｍ２）、スロープ部２５ｃの傾斜角は６０°である。浮上分離装置に供給する被処理水は、予め攪拌槽にて凝集剤と混合させ、フロック形成槽にて凝集処理されたものを用いた。
＜試験条件＞
被処理水流量：４０ｍ３／ｈｒ
日平均被処理水濁度：２〜５度
凝集処理時に用いた凝集剤：ポリ塩化アルミニウム（ＰＡＣ）を１０〜２０ｍｇ／Ｌ添加
被処理水の攪拌槽滞留時間：３分
攪拌槽での攪拌強度：２００ｓ−１
被処理水のフロック形成槽滞留時間：６分
フロック形成槽での攪拌強度：４０ｓ−１
被処理水の浮上分離槽滞留時間：８分
浮上槽水平断面積：１．９４ｍ２
浮上槽有効断面積（流入部の開口部面積を除いた浮上槽水平断面積）：１．６９ｍ２
浮上槽の水平断面積に対する処理速度：２０．６ｍ／ｈ
浮上槽有効断面積に対する処理速度：２３．７ｍ／ｈ
試験時間：３０日間連続運転 Using the floating separation device 2 of FIG. 6, the floating separation treatment was performed under the following conditions, and the turbidity of the treated water after the floating separation was measured. As shown in FIG. 3, the rectifying unit 22 used in the embodiment includes an upper opening 25a, a lower opening 25b smaller than the area of the upper opening 25a, and a slope portion 25c extending from the upper opening 25a to the lower opening 25b. The rectifying holes 22a are arranged so that the upper openings 25a are adjacent to each other. The thickness of the rectifying part 22 is 7.4 cm, the diameter is 160 cm, the opening area ratio of the rectifying hole 22a is 6.25% (the area of the upper opening 25a is 64 cm 2 , and the area of the lower opening 25b is 4 cm 2 ), and the slope The inclination angle of the portion 25c is 60 °. The water to be treated to be supplied to the flotation separation apparatus was previously mixed with a coagulant in a stirring tank and coagulated in a flock forming tank.
<Test conditions>
Untreated water flow rate: 40m 3 / hr
Daily average treated water turbidity: 2 to 5 degrees Flocculant used at the time of flocculation treatment: 10-20 mg / L of polyaluminum chloride (PAC) added Stirred tank residence time of treated water: 3 minutes Stirring strength in the stirring tank : 200s -1
Flock formation tank residence time of water to be treated: 6 minutes Stirring intensity in the flock formation tank: 40 s −1
Floating separation tank residence time of treated water: 8 minutes Flotation tank horizontal cross-sectional area: 1.94 m 2
Effective sectional area of floating tank (horizontal sectional area of floating tank excluding opening area of inflow part): 1.69 m 2
Processing speed for horizontal cross-sectional area of levitation tank: 20.6 m / h
Processing speed for effective sectional area of levitation tank: 23.7 m / h
Test time: 30 days continuous operation

（比較例）
比較例で用いた整流部は、図９に示すように、上部開口部同士は所定の間隔を開けて配置されているものである。それ以外は、実施例と同様の条件で試験を行った。 (Comparative example)
As shown in FIG. 9, the rectifying unit used in the comparative example is arranged such that the upper openings are spaced apart from each other. Other than that, the test was performed under the same conditions as in the example.

図７は、被処理水濁度、実施例及び比較例の処理水濁度の結果を表す図である。図７に示すように、実施例では、３０日間の連続運転でも、処理水の濁度が急激に高くなることもなく、安定した処理が可能であると判った。これに対し、比較例では、３０日間の連続運転の間に２回、処理水の濁度が急激に高くなり（３．２度、４．８度）、３０日間の連続運転では安定した処理を行うことができなかった。実施例の整流部は、下部開口部より面積の大きい上部開口部（さらに、上部開口部同士が隣接）及びスロープ部が形成されているため、整流部上又は整流孔内に沈殿物が堆積することがなく、沈殿物が処理水と共に浮上槽から排出されることが抑制された結果である。   FIG. 7 is a diagram illustrating the results of the water turbidity to be treated and the water turbidity of Examples and Comparative Examples. As shown in FIG. 7, in the example, it was found that even in continuous operation for 30 days, the turbidity of the treated water did not rapidly increase and stable treatment was possible. In contrast, in the comparative example, the turbidity of the treated water increased rapidly twice during the 30-day continuous operation (3.2 degrees and 4.8 degrees), and the treatment was stable in the 30-day continuous operation. Could not do. In the rectifying unit of the embodiment, since the upper opening (in addition, the upper openings are adjacent to each other) and the slope portion having a larger area than the lower opening are formed and the slope is formed, sediment is deposited on the rectifying unit or in the rectifying hole. This is the result that the sediment is prevented from being discharged from the floating tank together with the treated water.

本実施形態に係る浮上分離装置の構成の一例を示す模式断面図である。It is a schematic cross section which shows an example of a structure of the floating separation apparatus which concerns on this embodiment. 本実施形態で用いられる整流部の構成の一例を示す模式上面図である。It is a model top view which shows an example of a structure of the rectification | straightening part used by this embodiment. 図２のＡ−Ａ線における整流部の構成の一例を示す模式断面図である。It is a schematic cross section which shows an example of a structure of the rectification | straightening part in the AA line of FIG. 図２のＡ−Ａ線における整流部の構成の他の一例を示す模式断面図である。It is a schematic cross section which shows another example of a structure of the rectification | straightening part in the AA line of FIG. （Ａ）〜（Ｃ）は、分割セルの構成を示す模式斜視図である。(A)-(C) are model perspective views which show the structure of a division | segmentation cell. 本発明の他の実施形態に係る浮上分離装置の構成の一例を示す模式断面図である。It is a schematic cross section which shows an example of a structure of the floating separation apparatus which concerns on other embodiment of this invention. 被処理水濁度、実施例及び比較例の処理水濁度の結果を表す図である。It is a figure showing the result of the to-be-processed water turbidity and the treated water turbidity of an Example and a comparative example. 特許文献１の浮上分離装置の構成を示す模式図である。It is a schematic diagram which shows the structure of the floating separation apparatus of patent document 1. 特許文献１の浮上分離装置で用いられる整流部の構成を示す模式断面図である。It is a schematic cross section which shows the structure of the rectification | straightening part used with the floating separation apparatus of patent document 1.

符号の説明Explanation of symbols

１〜３ 浮上分離装置、１０，６０ 浮上槽、１０ａ，６０ａ 周壁、１０ｂ 底部、１０ｃ 集水部、１２ 流入部、１４ 排出部、１８ ピット、１９ 沈殿物排出管、２０ａ，６７ａ 上部、２０ｂ，６７ｂ 下部、２２，７０ 整流部、２２ａ，７０ａ 整流孔、２３ 浮上物、２４ 浮上物ポット、２５ａ，７１ａ 上部開口部、２５ｂ，７１ｂ 下部開口部、２５ｃ スロープ部、２６ ガイド筒、２６ａ，２８ａ 開口部、２７ 分割セル、２８ 導入管、３０，７２ 被処理水流入管、３２，７４ 加圧水流入管、３８ 処理水取出管、４０ 水位調整槽、４１ 可動堰、４２，７６ 処理水排出管、４４ 浮上物排出管、５０ 浮上物スキマー、５２ 沈殿物掻き寄せ機、５４ モータ、５６ 支持体、６２ａ，６２ｂ 隔壁、６４ 第１の室、６６ 第２の室、６８ 第３の室、７５ 空気溶解タンク、７８ ポンプ、８０ 連通管。   1-3 Floating separator 10, 60 Floating tank, 10a, 60a Perimeter wall, 10b Bottom part, 10c Water collecting part, 12 Inflow part, 14 Discharge part, 18 pit, 19 Sediment discharge pipe, 20a, 67a Upper part, 20b, 67b Lower part, 22, 70 Rectification part, 22a, 70a Rectification hole, 23 Floating object, 24 Floating object pot, 25a, 71a Upper opening part, 25b, 71b Lower opening part, 25c Slope part, 26 Guide tube, 26a, 28a opening 27, split cell, 28 inlet pipe, 30, 72 treated water inflow pipe, 32,74 pressurized water inflow pipe, 38 treated water takeout pipe, 40 water level adjustment tank, 41 movable weir, 42,76 treated water discharge pipe, 44 Material discharge pipe, 50 levitated skimmer, 52 sediment scraper, 54 motor, 56 support, 62a, 62b partition, 64 first chamber, 6 6 Second chamber, 68 Third chamber, 75 air dissolution tank, 78 pump, 80 communication pipe.

Claims (9)

被処理水中の被処理物質に気泡を付着させ、被処理物質を浮上物として分離する浮上分離装置であって、
浮上槽と、前記浮上槽を垂直方向上部及び下部に区画する整流部と、前記上部に被処理水を流入させる流入部と、前記被処理物質が分離された処理水を前記下部から集水する集水部とを有し、
前記整流部は、前記処理水を通水させる複数の整流孔を備え、
前記整流孔は、上部開口部と、前記上部開口部の面積より小さい下部開口部と、前記上部開口部から前記下部開口部に至るスロープ部と、を有することを特徴とする浮上分離装置。 A levitation separation device that attaches bubbles to a substance to be treated in the water to be treated and separates the substance to be treated as a floating substance,
A floating tank, a rectifying section that divides the floating tank into an upper part and a lower part in a vertical direction, an inflow part that allows treated water to flow into the upper part, and treated water from which the treated substance is separated is collected from the lower part. A water collecting section,
The rectifying unit includes a plurality of rectifying holes for passing the treated water.
The rectifying hole includes an upper opening, a lower opening smaller than an area of the upper opening, and a slope portion extending from the upper opening to the lower opening. 請求項１記載の浮上分離装置であって、前記整流孔同士は、上部開口部同士が互いに隣接するように配列していることを特徴とする浮上分離装置。   The levitation separator according to claim 1, wherein the rectifying holes are arranged so that upper openings are adjacent to each other. 請求項１記載の浮上分離装置であって、前記スロープ部の傾斜角は、４５°〜７５°の範囲であることを特徴とする浮上分離装置。   The levitation separator according to claim 1, wherein the slope portion has an inclination angle in a range of 45 ° to 75 °. 請求項１記載の浮上分離装置であって、前記整流部は、複数の分割セルにより構成され、前記分割セルは、少なくとも１つ以上の前記整流孔を有することを特徴とする浮上分離装置。   The levitation separation apparatus according to claim 1, wherein the rectification unit includes a plurality of divided cells, and the divided cells include at least one rectification hole. 請求項１記載の浮上分離装置であって、前記上部開口部の面積に対する前記下部開口部の面積は、２〜１０％の範囲であることを特徴とする浮上分離装置。   2. The floating separator according to claim 1, wherein the area of the lower opening with respect to the area of the upper opening is in the range of 2 to 10%. 請求項１〜５のいずれか１項に記載の浮上分離装置であって、前記浮上槽は円筒状であることを特徴とする浮上分離装置。   It is a floating separation apparatus of any one of Claims 1-5, Comprising: The said floating tank is cylindrical shape, The floating separation apparatus characterized by the above-mentioned. 被処理水中の被処理物質に気泡を付着させ、被処理物質を浮上物として分離する浮上分離装置の浮上槽を垂直方向上部及び下部に区画する整流装置であって、
前記整流装置は、処理水を通水させる複数の整流孔を備え、
前記整流孔は、上部開口部と、前記上部開口部の面積より小さい下部開口部と、前記上部開口部から前記下部開口部に至るスロープ部と、を有することを特徴とする整流装置。 A rectifier that divides a levitation tank of a levitation separator that separates a substance to be treated as a levitated substance into upper and lower parts in a vertical direction by attaching bubbles to the substance to be treated in the treatment water,
The rectifying device includes a plurality of rectifying holes for passing treated water,
The rectifying hole includes an upper opening, a lower opening smaller than an area of the upper opening, and a slope portion extending from the upper opening to the lower opening. 請求項７記載の整流装置であって、前記整流装置は、複数の分割セルにより構成され、前記分割セルは、少なくとも１つ以上の前記整流孔を有することを特徴とする整流装置。   8. The rectifying device according to claim 7, wherein the rectifying device includes a plurality of divided cells, and the divided cells include at least one or more rectifying holes. 被処理水中の被処理物質に気泡を付着させ、被処理物質を浮上物として分離する浮上分離装置の浮上槽を垂直方向上部及び下部に区画する整流装置を構成する整流装置用分割セルであって、
前記整流装置用分割セルは、処理水を通水させる整流孔を少なくとも１つ以上備え、
前記整流孔は、上部開口部と、前記上部開口部の面積より小さい下部開口部と、前記上部開口部から前記下部開口部に至るスロープ部と、を有することを特徴とする整流装置用分割セル。 A splitting cell for a rectifying device that constitutes a rectifying device that divides a floating tank of a levitation separator that vertically separates a floating substance into a floating material by attaching bubbles to the material to be treated in the water to be treated, and separating the material to be treated as a floating substance. ,
The division cell for the rectifier includes at least one rectifying hole through which treated water flows,
The rectifying hole has an upper opening, a lower opening smaller than an area of the upper opening, and a slope portion extending from the upper opening to the lower opening. .
JP2008188637A 2008-07-22 2008-07-22 Floating separator, rectifier, and split cell for rectifier Active JP4825850B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008188637A JP4825850B2 (en) 2008-07-22 2008-07-22 Floating separator, rectifier, and split cell for rectifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008188637A JP4825850B2 (en) 2008-07-22 2008-07-22 Floating separator, rectifier, and split cell for rectifier

Publications (2)

Publication Number Publication Date
JP2010022964A JP2010022964A (en) 2010-02-04
JP4825850B2 true JP4825850B2 (en) 2011-11-30

Family

ID=41729308

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008188637A Active JP4825850B2 (en) 2008-07-22 2008-07-22 Floating separator, rectifier, and split cell for rectifier

Country Status (1)

Country Link
JP (1) JP4825850B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5697920B2 (en) * 2010-07-30 2015-04-08 オルガノ株式会社 Levitation separator
JP5524775B2 (en) * 2010-09-09 2014-06-18 オルガノ株式会社 Levitation separator
JP5886518B2 (en) * 2010-09-24 2016-03-16 オルガノ株式会社 Levitation separator
CN105923679A (en) * 2016-04-28 2016-09-07 浙江永立环保工程有限公司 Vertical-flow air floatation system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001300514A (en) * 2000-04-28 2001-10-30 Kurita Water Ind Ltd Pressure floatation device
FR2835247B1 (en) * 2002-01-30 2005-01-28 Ondeo Degremont FLOTATION WATER TREATMENT FACILITY
JP4009180B2 (en) * 2002-11-06 2007-11-14 昌紀 江内 Suspended water separation treatment system
FR2890651B1 (en) * 2005-09-09 2007-11-09 Degremont Sa WATER CLARIFICATION APPARATUS AND METHOD FOR IMPLEMENTING THE SAME.

Also Published As

Publication number Publication date
JP2010022964A (en) 2010-02-04

Similar Documents

Publication Publication Date Title
KR101722099B1 (en) Water Processing Apparatus Used Dissolved Air Flotation Unit for Stable Bubble Generation
CN102036731B (en) Rectangular sedimentation system having a self-aggregation facility
EP3018101B1 (en) Dissolved air floatation device
JP4696646B2 (en) Sedimentation tank
JP5393065B2 (en) Levitation separator
JP3331219B2 (en) Method and apparatus for separating insoluble particles from a liquid
JP5497873B2 (en) Levitation separator
JP4885169B2 (en) Levitation separator
JP4825850B2 (en) Floating separator, rectifier, and split cell for rectifier
JP5619379B2 (en) Solid-liquid separator
KR101773379B1 (en) System for clarifying oily water using horizontal induced gas flotation including a cyclone and the method thereof
JP4470486B2 (en) Sedimentation tank
US8173017B2 (en) Single-cell mechanical flotation system
JP2005013844A (en) Scum floatation separation apparatus
JP5239653B2 (en) Pressure levitation treatment method
JP5886518B2 (en) Levitation separator
JP5697920B2 (en) Levitation separator
CN213112603U (en) Dissolved air flotation machine
JP5524775B2 (en) Levitation separator
JP7083650B2 (en) Solid-liquid separator
CN212050637U (en) Oily waste water oil removal device
KR101989834B1 (en) Waste water treatment apparatus
KR102012965B1 (en) Dissolved Air Flotation System using ambient air
KR101892942B1 (en) Settling Basin For Water Treatment
KR101773378B1 (en) Horizontal induced gas flotation for clarifying oily water including a demister and the method thereof

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20110214

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110824

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: 20110906

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110912

R150 Certificate of patent or registration of utility model

Ref document number: 4825850

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

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

Free format text: PAYMENT UNTIL: 20140916

Year of fee payment: 3

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

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

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

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250