JP2602704Y2 - Coagulation reaction tank - Google Patents
Coagulation reaction tankInfo
- Publication number
- JP2602704Y2 JP2602704Y2 JP1993027803U JP2780393U JP2602704Y2 JP 2602704 Y2 JP2602704 Y2 JP 2602704Y2 JP 1993027803 U JP1993027803 U JP 1993027803U JP 2780393 U JP2780393 U JP 2780393U JP 2602704 Y2 JP2602704 Y2 JP 2602704Y2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- tank
- cylindrical tank
- water surface
- coagulated sludge
- 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.)
- Expired - Fee Related
Links
Landscapes
- Treatment Of Sludge (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この考案は、汚泥の造粒濃縮装置
に供給する汚泥を金属塩凝集剤によって改質（荷重中
和）するための凝集反応槽に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coagulation reactor for reforming (load neutralizing) sludge supplied to a sludge granulating and concentrating apparatus with a metal salt coagulant.
【０００２】[0002]
【従来の技術】従来から、凝集剤を混合した汚泥が底部
に供給される縦長な円筒槽の中心沿いに水面上から槽底
に達する回転軸を設け、該回転軸の回りに平羽根を複数
枚、放射状に取付けた凝集反応槽は公知であり、金属塩
凝集剤と汚泥の反応は非常に速いので、回転軸を高速
（約１５０ＲＰＭ）で回転し、凝集剤と汚泥を平羽根に
よって激しく強攪拌している。2. Description of the Related Art Conventionally, a rotary shaft is provided along the center of a vertical cylindrical tank in which sludge mixed with a flocculant is supplied to the bottom from the water surface to the tank bottom, and a plurality of flat blades are provided around the rotary axis. The flocculation reaction tanks mounted in a radial pattern are well known, and the reaction between the metal salt flocculant and the sludge is very fast. Therefore, the rotating shaft is rotated at a high speed (about 150 RPM), and the flocculant and the sludge are violently strengthened by flat blades. Stirring.
【０００３】[0003]
【考案が解決しようとする課題】上記従来装置により強
攪拌して汚泥を改質することはできるが、汚泥中に含ま
れているマイクロエアーや、汚泥のｐＨ低下に伴い汚泥
中に発生するＣＯ2 ガスを除去することができず、マイ
クロエアーや、ＣＯ2 ガスを含む汚泥が造粒濃縮装置に
供給される。この造粒濃縮装置では供給された汚泥に高
分子凝集剤を添加し、造粒してペレットにするが、供給
される汚泥が上述のようにマイクロエアーや、ＣＯ2 ガ
スを含んでいると、それらがペレット中に混入し、ペレ
ットの強度の低下、浮上によるスカム化、脱水ケーキの
含水率の上昇、処理量の低下、汚泥回収率の低下など脱
水性能が大幅に低下する。The sludge can be reformed by vigorous stirring with the above-mentioned conventional apparatus. However, micro-air contained in the sludge or CO generated in the sludge due to a decrease in the pH of the sludge can be improved. 2 Gas cannot be removed, and sludge containing micro air and CO 2 gas is supplied to the granulating and concentrating apparatus. In this granulating and concentrating apparatus, a polymer flocculant is added to the supplied sludge and granulated into pellets.If the supplied sludge contains micro air or CO 2 gas as described above, They are mixed into the pellets, and the dewatering performance is greatly reduced, such as a decrease in the strength of the pellets, scumming due to floating, an increase in the water content of the dewatered cake, a reduction in the throughput, and a reduction in the sludge recovery rate.
【０００４】[0004]
【課題を解決するための手段】本考案は上記問題点を解
消するために開発されたもので、凝集剤を混合した汚泥
が底部に供給される縦長な円筒槽の中心沿いに水面上か
ら槽底に達する回転軸を設け、該回転軸の回りに上下方
向に長い平羽根を複数枚、放射状に取付けると共に、前
記円筒槽の内周に水面付近から槽底近くに達する上下方
向に長い平板補助羽根を複数枚、放射状に取付け、且つ
円筒槽の外周に該円筒槽の水面から排出される凝集汚泥
を受入れ、凝集汚泥に含まれているガスを放出するエア
抜きボックスを設け、ガスを含まない凝集汚泥を次工程
に供給する排泥管を上記エア抜きボックスに接続したこ
とを特徴とする。DISCLOSURE OF THE INVENTION The present invention has been developed to solve the above-mentioned problems. The present invention relates to a vertically elongated cylindrical tank in which a coagulant-mixed sludge is supplied to the bottom of the tank. A rotary shaft that reaches the bottom is provided, and a plurality of flat blades that are long in the vertical direction are radially attached around the rotary shaft, and a vertically long flat plate that extends from near the water surface to near the tank bottom on the inner periphery of the cylindrical tank. A plurality of blades are mounted radially, and an air vent box is provided around the outer periphery of the cylindrical tank for receiving the coagulated sludge discharged from the water surface of the cylindrical tank and discharging the gas contained in the coagulated sludge. A sludge pipe for supplying coagulated sludge to the next step is connected to the air vent box.
【０００５】[0005]
【実施例】図示の実施例において、１０は縦長の円筒
槽、１１は槽内底部に汚泥と、金属塩の混合物を供給す
る給泥管、１２は円筒槽の中心沿いに水面上から槽底に
達する回転軸、１３は回転軸の回りに放射状に取付けら
れて水面上から槽底近くに達する上下方向に長い平羽根
であり、平羽根は回転軸の回りに２枚、１８０°の位相
で取付けてある。円筒槽１０の外周には、円筒槽の水面
から排出される凝集汚泥を受入れるエア抜きボックス１
７を設け、凝集汚泥を次段の造粒濃縮装置に供給する排
泥管１４は上記エア抜きボックス１７の底に接続してあ
る。円筒槽１０の直径は約１ｍ、深さは約３ｍ、水面か
らの水深は約２ｍ５０、回転軸の中心から平羽根１３の
翼端までの半径は約２０ｃｍであり、回転軸はモータ、
減速機１５により約１５０ＲＰＭで回転駆動される。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, reference numeral 10 denotes a vertically long cylindrical tank, 11 denotes a mud supply pipe for supplying a mixture of sludge and metal salt to the bottom of the tank, and 12 denotes a tank bottom along the center of the cylindrical tank from above the water surface. The rotating shafts 13 are radially mounted around the rotating shaft, and are vertically long flat blades extending from above the water surface to near the bottom of the tank. Two flat blades are arranged around the rotating shaft at a phase of 180 °. Installed. On the outer periphery of the cylindrical tank 10, an air release box 1 for receiving coagulated sludge discharged from the water surface of the cylindrical tank.
7 is provided, and a sludge pipe 14 for supplying the coagulated sludge to the next-stage granulating and concentrating apparatus is connected to the bottom of the air vent box 17. The diameter of the cylindrical tank 10 is about 1 m, the depth is about 3 m, the water depth from the water surface is about 2 m50, the radius from the center of the rotating shaft to the blade tip of the flat blade 13 is about 20 cm, and the rotating shaft is a motor,
It is rotationally driven by the speed reducer 15 at about 150 RPM.
【０００６】円筒槽１０の内周には水面付近から槽底近
くに達する上下方向に長い平板補助羽根１６が４枚、９
０°の位相で放射状に取付けてある。円筒槽の内周から
平板補助羽根の翼端までの半径方向の長さは約１０ｃｍ
である。On the inner periphery of the cylindrical tank 10, there are four vertically extending flat blades 16 extending from near the water surface to near the tank bottom.
Mounted radially at 0 ° phase. The radial length from the inner circumference of the cylindrical tank to the blade tip of the flat plate auxiliary blade is about 10 cm.
It is.
【０００７】円筒槽の底部に、給泥管１１で汚泥と金属
塩凝集剤の混合物を供給し、槽内をＬＶ＝５０ｍ／時以
下、滞流時間２〜３分で上向流させながら回転軸１２を
回転駆動し、平羽根１３，１３で強攪拌を行うことによ
り汚泥を金属塩凝集剤で改質することができる。そし
て、上下方向に長い平羽根１３の強攪拌により生じる旋
回流の一部は、円筒槽の内周から放射状に突出する上下
方向に長い平板補助羽根１６に衝突し、局部的に見て平
板補助羽根１６にＰ点で衝突した旋回流は上下方向の循
環流ａ，ｂに変化して乱流を生じる。この乱流により汚
泥同志が衝突して含んでいるマイクロエア、ＣＯ2 ガス
の気泡を放出すると共に、遊離した気泡どおしが衝突し
て大きくなる。この大きくなった気泡は、円筒槽の上部
液面から容易に大気中に放出される。[0007] A mixture of sludge and a metal salt coagulant is supplied to the bottom of the cylindrical tank through a mud supply pipe 11, and the inside of the tank is rotated while flowing upward with an LV of 50 m / hour or less and a residence time of 2 to 3 minutes. By rotating the shaft 12 and performing strong stirring with the flat blades 13, 13, sludge can be modified with a metal salt coagulant. Then, a part of the swirling flow generated by the strong stirring of the vertically long flat blades 13 collides with the vertically long flat plate auxiliary blades 16 projecting radially from the inner periphery of the cylindrical tank, and when viewed locally, the flat plate auxiliary blades 16 are reduced. The swirling flow colliding with the blade 16 at the point P changes into the circulating flows a and b in the vertical direction, and generates a turbulent flow. This turbulence causes the bubbles of the micro air and CO 2 gas contained in the sludge to collide with each other, and the released bubbles collide and become larger. These enlarged bubbles are easily released into the atmosphere from the upper liquid level of the cylindrical tank.
【０００８】こうしてガスを放出した凝集汚泥は円筒槽
の水面から該円筒槽の外周に設けたエア抜きボックス１
７に流出し、凝集汚泥中にガスが残溜している場合、そ
のガスはエア抜きボックスで放出される。従って、ガス
を全く含まない凝集汚泥を排泥管１４で次段の造粒濃縮
設備に供給することができる。[0008] The coagulated sludge that has released the gas is discharged from the water surface of the cylindrical tank to an air release box 1 provided on the outer periphery of the cylindrical tank.
When the gas flows out into the coagulated sludge and remains in the coagulated sludge, the gas is discharged from the air release box. Therefore, the coagulated sludge containing no gas can be supplied to the next-stage granulation-concentration facility through the sludge pipe 14.
【０００９】[0009]
【考案の効果】このように本考案の凝集反応槽によれば
汚泥を金属塩凝集剤で凝集汚泥に改質することができる
ほか、凝集汚泥に含まれているマイクロエアーや、反応
中にｐＨの低下で生じるＣＯ2 ガスを汚泥から放出さ
せ、円筒槽の水面や、エア抜きボックスから大気に放出
する。従って、次段の造粒濃縮装置に供給される凝集汚
泥は気泡を含まないので、造粒濃縮装置は強度のあるペ
レットを造粒でき、脱水性能の低下を生じない。そし
て、従来は処理が困難とされていた夏季の腐敗汚泥から
も良好なペレットが造粒可能になった。As described above, according to the coagulation reaction tank of the present invention, sludge can be modified into coagulated sludge with a metal salt coagulant, micro-air contained in coagulated sludge, and pH during the reaction. the CO 2 gas generated in the reduction of released from the sludge, and the water surface of the cylindrical tank, releasing from the air vent box to the atmosphere. Therefore, the coagulated sludge supplied to the next-stage granulating / concentrating apparatus does not contain air bubbles, so that the granulating / concentrating apparatus can granulate strong pellets and does not cause a decrease in dewatering performance. In addition, good pellets can be granulated from the putrefaction sludge in the summer season, which was conventionally difficult to treat.
【図１】本考案の凝集反応槽の一実施例の断面図であ
る。FIG. 1 is a cross-sectional view of one embodiment of the agglutination reaction tank of the present invention.
【図２】図１のＩＩ−ＩＩ線での断面図である。FIG. 2 is a sectional view taken along line II-II in FIG.
１０ 円筒槽 １１ 給泥管 １２ 回転軸 １３ 平板羽根 １４ 排泥管 １６ 平板補助羽根 １７ エア抜きボックス DESCRIPTION OF SYMBOLS 10 Cylindrical tank 11 Mud supply pipe 12 Rotation shaft 13 Flat blade 14 Drainage pipe 16 Flat plate auxiliary blade 17 Air release box
───────────────────────────────────────────────────── フロントページの続き (72)考案者 松中 真 東京都新宿区西新宿３丁目４番７号 栗 田工業株式会社内 (56)参考文献 特開 昭62−197110（ＪＰ，Ａ) 特開 昭57−132541（ＪＰ，Ａ) 実開 昭54−65476（ＪＰ，Ｕ) 実公 平４−18666（ＪＰ，Ｙ２) (58)調査した分野(Int.Cl.7，ＤＢ名) C02F 11/00 - 11/20 B01D 21/08 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Makoto Matsunaka 3-4-7 Nishi-Shinjuku, Shinjuku-ku, Tokyo Inside Kurita Kogyo Co., Ltd. (56) References JP-A-62-197110 (JP, A) JP-A Sho 57-132541 (JP, A) Shokai Sho 54-54476 (JP, U) Shoko 4-18666 (JP, Y2) (58) Fields investigated (Int. Cl. 7 , DB name) C02F 11 / 00-11/20 B01D 21/08
Claims (1)
る縦長な円筒槽の中心沿いに水面上から槽底に達する回
転軸を設け、該回転軸の回りに上下方向に長い平羽根を
複数枚、放射状に取付けると共に、前記円筒槽の内周に
水面付近から槽底近くに達する上下方向に長い平板補助
羽根を複数枚、放射状に取付け、且つ円筒槽の外周に該
円筒槽の水面から排出される凝集汚泥を受入れ、凝集汚
泥に含まれているガスを放出するエア抜きボックスを設
け、ガスを含まない凝集汚泥を次工程に供給する排泥管
を上記エア抜きボックスに接続したことを特徴とする凝
集反応槽。1. A rotary shaft is provided along the center of a vertical cylindrical tank to which sludge mixed with a flocculant is supplied to the bottom, from the water surface to the tank bottom, and flat blades which are long in the vertical direction around the rotary shaft are provided. Plural sheets, radially attached, and a plurality of vertically long flat plate auxiliary blades extending from near the water surface to near the tank bottom on the inner periphery of the cylindrical tank, and radially attached, and on the outer periphery of the cylindrical tank from the water surface of the cylindrical tank. An air vent box for receiving the discharged coagulated sludge and discharging the gas contained in the coagulated sludge is provided, and a drain pipe for supplying coagulated sludge containing no gas to the next process is connected to the air vent box. A unique agglutination reaction tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993027803U JP2602704Y2 (en) | 1993-04-30 | 1993-04-30 | Coagulation reaction tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993027803U JP2602704Y2 (en) | 1993-04-30 | 1993-04-30 | Coagulation reaction tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0681700U JPH0681700U (en) | 1994-11-22 |
| JP2602704Y2 true JP2602704Y2 (en) | 2000-01-24 |
Family
ID=12231142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1993027803U Expired - Fee Related JP2602704Y2 (en) | 1993-04-30 | 1993-04-30 | Coagulation reaction tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2602704Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3459913A4 (en) * | 2016-08-23 | 2020-07-29 | Wu, Yunping | Highly efficient pipe-type flocculation mixer, and feeding-mixing device |
| KR101879239B1 (en) * | 2017-05-04 | 2018-07-17 | 한국외국어대학교 연구산학협력단 | Apparatus for mixing flocculation |
-
1993
- 1993-04-30 JP JP1993027803U patent/JP2602704Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0681700U (en) | 1994-11-22 |
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Legal Events
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