JP4067679B2

JP4067679B2 - Flock derivation device in granulation dehydration device for suspension

Info

Publication number: JP4067679B2
Application number: JP06628599A
Authority: JP
Inventors: 武幸西村; 優一若間; 達也千賀
Original assignee: Tsurumi Manufacturing Co Ltd
Current assignee: Tsurumi Manufacturing Co Ltd
Priority date: 1999-03-12
Filing date: 1999-03-12
Publication date: 2008-03-26
Anticipated expiration: 2019-03-12
Also published as: JP2000254473A

Description

【０００１】
【発明の技術分野】
本発明は、懸濁液の造粒脱水装置におけるフロック導出装置に関するものである。
【０００２】
【従来技術とその問題点】
懸濁液を攪拌造粒槽内で造粒させ、生成されたフロックを槽外へ導出して脱水装置へ移送させることは、従来から広く行われている。しかし生成されたフロックの導出量を必要に応じ増減調節させることについては、有効な対策が採られていないのが実情である。
【０００３】
【発明の目的】
本発明の目的は、一つの攪拌造粒槽内で懸濁液を造粒反応させる造粒脱水装置におけるフロックの導出量を、その導出状況に対応させて適切な量に増減調整でき、メッシュ状脱水袋を用いた簡易な脱水処理においても十分な効果が得られるフロック導出装置を提供することにある。
【０００４】
【発明の構成】
本発明に係る懸濁液の造粒脱水装置におけるフロック導出装置では、攪拌造粒槽の槽底中心部より導入された懸濁液送給管の導入上端部を上記攪拌造粒槽の槽底面よりも高く突出させ、原動機により駆動される回転軸を上記攪拌造粒槽の中心部に縦設し、上記攪拌造粒槽内の液中で水平回転する垂直状攪拌羽根を上記回転軸の外周に張設させ、上記回転軸の下端には上記懸濁液送給管の上端縁と対向してその外周よりも大径に下面開口させた伏椀状体を定着させ、該伏椀状体の外周には上記攪拌造粒槽内の液中で水平回転してその回転方向に対向するよう上り勾配に捻成された傾斜状攪拌羽根を張設させ、上記垂直状攪拌羽根と傾斜状攪拌羽根との間に位置して攪拌造粒槽の槽壁内周面に近接させ槽壁内周に沿って近接するよう導下された回動操作軸に枢着せられ、攪拌造粒槽の槽壁内周面からの離反角度が増減調節される可動可能な案内羽根を配設し、上記攪拌造粒槽の上方部に清澄液導出口を開設し、上記攪拌造粒槽内中層付近の濃縮ゾーン部より開口せられフロック導出用開閉弁を介して連通管を導出させ、底面が前記清澄液導出口の開口位置よりも低位置にあるようフロック枡を外設して、該フロック枡のフロック導入口に前記連通管の導出端を接続すると共に、フロック枡内において堰高の調節が可能なように立設された越流堰を介してフロック導出口を開設し、前記清澄液導出口の開口位置よりも低位置において越流堰の堰高を調節することによりフロック導出口からのフロック導出量が増減調整されるよう構成し、更に上記フロック導出口をメッシュ状脱水袋内へ開口させ、該フロック導出口外周に上記メッシュ状脱水袋開口上縁部を紐体で絞り込んで嵌合し、上記紐体をフロック枡に外設された固定体に掛止させ、上記メッシュ状脱水袋の嵌合部の下方に多数の襞を形成し巾着形にフロック枡のフロック導出口下方に上記メッシュ状脱水袋を垂設するよう構成し、更にまた垂設される上記メッシュ状脱水袋に横揺れの振動を与えるためのバイブレータを付設するよう構成する。
【０００５】
【実施例】
以下実施例の図面により説明をする。
【０００６】
１は懸濁液を処理するための攪拌造粒槽、２は攪拌造粒槽１の槽底中心部より導入される懸濁液送給管であり、その導入上端部２ｅは攪拌造粒槽１の槽底面１ａよりも高く突出されている。３は懸濁液送給管２の途中に開設された凝集剤注入口、４は攪拌造粒槽１の中心部に縦設された回転軸であり、モータ等の原動機５により駆動される。６は攪拌造粒槽１内の液中で水平回転するよう回転軸４の外周に張設された垂直状攪拌羽根であり、上下に間隔を隔てて直交状に対向する多段構成とすることが望ましい。７は懸濁液送給管２の上端縁と対向してその外周よりも大径に下面開口された伏椀状体であり、その上面中心部が回転軸４の下端部に定着されている。８は攪拌造粒槽１内の液中で水平回転するよう伏椀状体７の外周に張設された傾斜状攪拌羽根であり、その回転方向に対向するよう上り勾配に捻成されている。９は攪拌造粒槽１の槽壁内周に沿って近接するよう導下された操作軸、１０は攪拌造粒槽１の槽壁内周面に近接し操作軸９に枢支された垂直状攪拌羽根６と傾斜状攪拌羽根８との間に両攪拌羽根６，８の外径よりも内側に入り込むように介装された案内羽根であり、操作軸９の回動操作によって攪拌造粒槽１の槽壁内周面からの離反角度を増減調節できるような可動構造とすることが望ましい。１１は攪拌造粒槽１内に装備された汚泥界面検出センサー、１２は攪拌造粒槽１内中層付近の濃縮ゾーン部より開口導出されてその上導端を後記フロック導入口１３ａへ接続させた連通管、１２ｖは連通管１２に付設されたフロック導出用開閉弁であり、通常は閉状態となっているが、所定サイクル時間でのタイマー制御か、または前記汚泥界面検出センサー１１が造粒汚泥界面を検知した後、所定の設定時間だけ開状態となる。１４は前記連通管１２におけるフロック導出用開閉弁１２ｖの２次側より分岐状に導出された残留フロック排出口であり、付設された残留フロック排出用開閉弁１４ｖの操作によって開閉される。１５は攪拌造粒槽１の上方外周部に繞設された集液樋であり、例えば導通用透孔１５ｃにより攪拌造粒槽１へ導通される導通部１５ａと、攪拌造粒槽１から遮断された非導通部１５ｂとが、清澄液流出液位規制用の越流堰１５ｄを介して隣接し、非導通部１５ｂの下底部からは清澄液導出口１６が導出されている。上記越流堰１５ｄは例えば複数枚の堰体の組み合わせからなり、集液樋１５の導通部１５ａと非導通部１５ｂとの隣接部において差し込み構造等により多段状に積層して縦設され、この積層枚数を増減して堰高ｔを調節させることで攪拌造粒槽１内における液位上昇限つまり清澄液流出液位Ｌの設定値が変更できるのである。１３は底面が前記清澄液導出口１６の開口位置よりも低位置にあるように外設されたフロック枡で、前方底部に開設されたフロック導入口１３ａを前記連通管１２の上導端部へ接続し、後方底部から導下されたフロック導出口１３ｂを、メッシュ状脱水袋１７内へ開口させ、該メッシュ状脱水袋１７開口上縁部を紐体１８で絞り込んでフロック導出口１３ｂの外周面へ嵌合させた状態により、上記紐体１８を固定体に掛止させれば、メッシュ状脱水袋１７はその上方部に多数の襞１７ｐが形成された巾着形となってフロック枡１３のフロック導出口１３ｂ下方に吊下げられた状態となる。フロック導出口１３ｂはこれを複数口並列状に開設して各導出口１３ｂ・・・・１３ｂにそれぞれメッシュ状脱水袋１７・・・・１７を嵌合させることも可能である。１９は吊下げられたメッシュ状脱水袋１７に横揺れの振動を与えるためのバイブレータであり、メッシュ状脱水袋１７を直接的に振動させてもよく、或いは支持体を振動させてその振動がメッシュ状脱水袋１７に伝達されるという態様であってもよい。２０はフロック導出量規制用の越流堰であり、実施例の図面には連通管１２の上導部からフロック枡１３の上方へ亘って縦設された板体に穿設された流通窓２０ｗの下縁部を堰縁２０ｅに形成し、板体を上下にスライドさせてフロック枡１３内における堰縁２０ｅの高さ即ち堰高が所要の高さとなったところで蝶ネジ等の定着具２１により越流堰２０を固定させるという構造のものを示しているが、要はフロック枡１３内において堰高の調節が可能なように立設されておればよいのである。
【０００７】
凝集剤注入口３から凝集剤を添加させつつ懸濁液送給管２内で初期混合し懸濁液送給管２の導入上端部２ｅにより送給された懸濁液は、槽底中心部より伏椀状体７内に流入してその上壁により流出衝突し該伏椀状体７内周壁と槽底面１ａより突出の上記導入上端部２ｅ外周間の環状隙間を流下し、槽底面１ａに再び衝突させることにより上記初期混合された懸濁液をより一層均一に混合されると共にその流入流速を減速させながら上昇流を抑止させ、流速が極度に低減した状態となった後に傾斜状攪拌羽根８により緩やかな上昇旋回流攪拌となり、処理条件に対応させて角度調節された案内羽根１０によって上記旋回流に乱流を生じさせる。そして、前記案内羽根１０の上方に設けられた垂直状攪拌羽根６の回転により懸濁液に潜む未反応微小粒子を吸着捕捉し該垂直状攪拌羽根６の付設位置付近に濃縮ゾーンが生成され、該垂直状攪拌羽根６を回転させることにより上記濃縮ゾーン中のフロックに転がし作用が生じ球状の圧密にされたフロックが生成され、更に垂直状攪拌羽根６が多段構成である場合には上記同様先ず下段の垂直状攪拌羽根６ａにより生成されたフロックが該垂直状攪拌羽根６ａの部分まで充満して懸濁液送給管２から流入してくる懸濁液に潜む未反応微小粒子を吸着捕捉する濃縮ゾーンが生成され、次いで上段の垂直状攪拌羽根６ｂによって濃縮ゾーンの表層にあるフロックに対しても有効に転がし作用が生じるので、より一層造粒作用が促進されてやがて該生成のフロック層が汚泥界面検出センサー１１の検知位置に到達し該汚泥界面検出センサー１１による検出信号によりフロック導出用開閉弁１２ｖが所定の設定時間だけ開状態となって、中層付近の濃縮ゾーン部より開口導出された連通管１２内を経由し所定量のフロックが越流堰２０を超えてフロック導出口１３ｂから導出される。また、フロック導出用開閉弁１２ｖを開作動させる他の手段として、所定サイクル時間でのタイマー制御も有効である。即ち、懸濁液送給管２から攪拌造粒槽１内への懸濁液流入量および攪拌造粒槽１内における造粒処理能力から勘案して、汚泥界面が所定レベルに達するまでの所要時間を算定したタイマー設定により、経時的にフロック導出用開閉弁１２ｖが所要時間だけ開状態となってフロック導出口１３ｂから所定量のフロックを導出させるのである。
【０００８】
このフロック導出量の増減制御は越流堰２０の堰高を調節すること、つまり攪拌造粒槽１内の液位上昇限Ｌと越流堰２０の堰高との液位差Δｈを調整することで行われる。そしてフロック導出口１３ｂから導出されたフロックはメッシュ状脱水袋１７内に収容され、その重量が加わることによって垂設されるメッシュ状脱水袋１７には和食調理で用いられる茶巾絞り（茹でた食材を布巾に包んで搾る）のようにメッシュ状脱水袋１７の襞１７ｐは深められて絞り効果を生じ自然重力脱水と相まって無動力で有効な脱水処理が行われるが、バイブレータ１９による加振作動を併用させれば更に脱水効果が高められる。脱水後のフロックはメッシュ状脱水袋１７ごと回収して廃棄してもよく、或いは別の容器に移し替えて処理してもよい。また、分離された清澄液は導通用透孔１５ｃを通って集液樋１５の導通部１５ａ内へ流入し、越流堰１５ｄの上縁を超えて非導通部１５ｂ内へ達し、清澄液導出口１６から導出されるのであるが、この清澄液流出液位Ｌは越流堰１５ｄの堰高ｔによって定まり、清澄液流出液位Ｌと攪拌造粒槽１内の液位上昇限とは一致する。尚、定められた時間帯でのフロック導出工程が終了して次のフロック導出工程開始までの間に、残留フロックが硬化して連通管１２内におけるフロック導出用開閉弁１２ｖの２次側が閉塞状態となることを避けるため、フロック導出用開閉弁１２ｖが閉作動した時点で残留フロック排出用開閉弁１４ｖを開操作して、連通管１２内の残留フロックを残留フロック排出口１４から排出させておくことが望ましい
【０００９】
【発明の効果】
本発明に係る一つの攪拌造粒槽内で懸濁液を造粒反応させる造粒脱水装置におけるフロック導出装置によれば、球状の圧密に生成されたフロックの導出量がその導出状況を確認しながら簡単な操作で作業の進捗に対応した適切な量に増減変更でき、メッシュ状脱水袋を用いた簡易な脱水処理においても十分な効果が得られるという利点を有するもである。更に、大きな設置スペースを要することなく、維持管理が容易あり、廉価でランニングコストも低い脱水処理が行われるという副次的な効果を有するもである。
【図面の簡単な説明】
【図１】本発明装置の要部縦断側面図であって、フロック導出量規制用の越流堰の堰高を低く調節した状態を示す。
【図２】本発明装置の要部縦断側面図であって、フロック導出量規制用の越流堰の堰高を高く調節した状態を示す。
【図３】図１および図２におけるＡ−Ａ線における横断平面図である。
【図４】本発明装置おける攪拌造粒槽部分の平面図である。
【図５】本発明装置おけるフロック導出量規制用の越流堰の正面図である。
【符号の説明】
１造粒攪拌槽
１ａ槽底面
２懸濁液送給管
２ｅ導入上端部
４回転軸
５原動機
６垂直状攪拌羽根
７伏椀状体
８傾斜状攪拌羽根
９操作軸
１０案内羽根
１２連通管
１２ｖフロック導出用開閉弁
１３フロック枡
１３ａフロック導入口
１３ｂフロック導出口
１６清澄液導出口
１７メッシュ状脱水袋
１７Ｐ襞
１８紐体
１９バイブレータ
２０フロック導出量規制用の越流堰[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a floc derivation device in a granulation and dehydration device for a suspension.
[0002]
[Prior art and its problems]
Conventionally, the suspension is granulated in a stirring granulation tank, and the generated floc is led out of the tank and transferred to a dehydrating apparatus. However, in reality, no effective measures have been taken to adjust the amount of generated floc derived to increase or decrease as necessary.
[0003]
OBJECT OF THE INVENTION
The object of the present invention is to adjust the amount of floc derived in the granulation dehydration apparatus for granulating and reacting the suspension in one agitation granulation tank to an appropriate amount corresponding to the state of derivation. An object of the present invention is to provide a floc derivation device that can obtain a sufficient effect even in a simple dehydration process using a dehydration bag.
[0004]
[Structure of the invention]
In the floc derivation device in the granulation dehydration apparatus for suspension according to the present invention, the introduction upper end of the suspension feeding pipe introduced from the center of the bottom of the stirring granulation tank is the tank bottom of the stirring granulation tank. The rotating shaft driven by the prime mover is vertically installed at the center of the stirring granulation tank, and a vertical stirring blade that rotates horizontally in the liquid in the stirring granulation tank has an outer periphery of the rotating shaft. A prosthetic body that is opposed to the upper end edge of the suspension feed pipe and has a lower opening larger in diameter than the outer periphery thereof is fixed to the lower end of the rotating shaft; On the outer periphery of the agitator, an inclined stirring blade that is horizontally rotated in the liquid in the stirring granulation tank and twisted in an upward gradient so as to face the rotation direction is stretched, and the vertical stirring blade and the inclined stirring are provided. guide Do the times to close position and along the inner periphery proximity to vessel wall to the vessel wall peripheral surface of the stirring granulation tank between the vanes A movable guide vane, which is pivotally attached to the operation shaft and is adjusted to increase or decrease the separation angle from the inner peripheral surface of the stirring granulation tank, is provided, and a clarified liquid outlet is provided at the upper part of the stirring granulation tank. Established and opened from the concentration zone near the middle layer in the agitation granulation tank, the communication pipe is led out via a flock derivation on-off valve, and the bottom surface seems to be lower than the opening position of the clarification liquid outlet A floc rod is externally connected, and the lead-out end of the communication pipe is connected to the floc introduction port of the floc rod, and an overflow overflow weir is installed in the floc rod so that the weir height can be adjusted. Opening a flock outlet, and adjusting the height of the overflow weir at a position lower than the opening position of the clarified liquid outlet, the amount of floc derived from the flock outlet is increased or decreased, and further Open the flock outlet into the mesh dewatering bag The mesh-shaped dewatering bag opening upper edge is squeezed and fitted to the outer periphery of the flock lead-out port with a string body, and the string body is hooked on a fixed body externally provided on the flock hook, and the mesh-shaped dewatering bag is A large number of ridges are formed below the fitting portion, and the mesh-shaped dewatering bag is suspended below the flock outlet of the flock casket in a drawstring shape. A vibrator for giving vibration of vibration is attached.
[0005]
【Example】
Hereinafter, description will be made with reference to the drawings of the embodiments.
[0006]
1 is a stirring granulation tank for treating the suspension, 2 is a suspension feed pipe introduced from the center of the bottom of the stirring granulation tank 1, and the upper end 2e of the introduction is a stirring granulation tank It protrudes higher than the tank bottom surface 1a. 3 is a flocculant injection port established in the middle of the suspension feed pipe 2, and 4 is a rotary shaft vertically provided at the center of the stirring granulation tank 1, and is driven by a prime mover 5 such as a motor. Reference numeral 6 denotes a vertical stirring blade stretched around the outer periphery of the rotary shaft 4 so as to rotate horizontally in the liquid in the stirring granulation tank 1, and has a multi-stage configuration that is orthogonally opposed with an interval in the vertical direction. desirable. Reference numeral 7 denotes a prone body opposed to the upper end edge of the suspension feed pipe 2 and having a lower surface opened to a diameter larger than the outer periphery thereof, and the center portion of the upper surface is fixed to the lower end portion of the rotating shaft 4. . 8 is an inclined stirring blade stretched around the outer periphery of the prone body 7 so as to rotate horizontally in the liquid in the stirring granulation tank 1, and is twisted in an upward gradient so as to oppose the rotation direction thereof. . 9 is an operation shaft guided so as to be close to the inner periphery of the tank wall of the stirring granulation tank 1, and 10 is a vertical shaft which is adjacent to the inner peripheral surface of the tank of the stirring granulation tank 1 and is pivotally supported by the operation shaft 9. Guide blades interposed between the stirring blades 6 and the inclined stirring blades 8 so as to enter the inside of the outer diameters of the two stirring blades 6, 8. It is desirable to have a movable structure that can adjust the separation angle of the tank 1 from the inner peripheral surface of the tank wall. 11 is a sludge interface detection sensor equipped in the stirring granulation tank 1, and 12 is an opening derived from the concentration zone near the middle layer in the stirring granulation tank 1, and the leading end is connected to the flock introduction port 13a described later. The communication pipe 12v is a flock derivation opening / closing valve attached to the communication pipe 12 and is normally closed, but it is controlled by a timer at a predetermined cycle time or the sludge interface detection sensor 11 is granulated sludge. After detecting the interface, it is opened for a predetermined set time. Reference numeral 14 denotes a residual flock discharge port that is branched out from the secondary side of the floc derivation on-off valve 12v in the communication pipe 12, and is opened and closed by operating the attached residual flock discharge on-off valve 14v. 15 is a liquid collecting tank provided on the upper outer peripheral portion of the stirring granulation tank 1, and is cut off from the stirring granulation tank 1, for example, the conduction part 15 a that is connected to the stirring granulation tank 1 through the through hole 15 c for conduction. The non-conducting part 15b is adjacent to the clarified liquid effluent liquid level regulating overflow weir 15d, and the clarified liquid outlet 16 is led out from the bottom of the non-conducting part 15b. The overflow weir 15d is composed of, for example, a combination of a plurality of weir bodies, and is vertically stacked in a multi-stage shape by an insertion structure or the like at the adjacent portion of the conducting portion 15a and the non-conducting portion 15b of the collecting tank 15. By adjusting the weir height t by increasing / decreasing the number of stacked layers, the set value of the liquid level rising limit in the stirring granulation tank 1, that is, the clarified liquid effluent liquid level L can be changed. Reference numeral 13 denotes a floc rod externally provided so that the bottom surface is lower than the opening position of the clarified liquid outlet port 16. The flock introduction port 13 a opened at the front bottom portion is connected to the upper guiding end portion of the communication pipe 12. The floc outlet 13b connected and guided from the rear bottom is opened into the mesh-shaped dewatering bag 17, and the upper edge of the opening of the mesh-shaped dewatering bag 17 is squeezed by the string 18, and the outer peripheral surface of the flock outlet 13b If the string body 18 is hooked to the fixed body in the state of being fitted to the mesh, the mesh-shaped dewatering bag 17 becomes a drawstring shape having a large number of hooks 17p formed on the upper part thereof, and the flock of the flock hook 13 It will be in the state suspended below the outlet 13b. It is also possible to open a plurality of flock outlets 13b in parallel with each other, and fit the mesh-shaped dewatering bags 17... 17 to the outlets 13b. Reference numeral 19 denotes a vibrator for imparting rolling vibration to the suspended mesh-shaped dewatering bag 17, and the mesh-shaped dewatering bag 17 may be directly vibrated, or the support is vibrated and the vibration is meshed. Alternatively, it may be transmitted to the dewatering bag 17. Reference numeral 20 denotes an overflow weir for restricting the amount of floc derivation. In the drawing of the embodiment, in the drawing of the embodiment, a flow window 20w drilled in a plate body provided vertically from the upper guide portion of the communication pipe 12 to above the floc rod 13. The lower edge portion is formed on the weir edge 20e, and the plate body is slid up and down, and when the height of the weir edge 20e in the flock rod 13, that is, the weir height becomes a required height, the fixing tool 21 such as a thumbscrew is used. Although the thing of the structure of fixing the overflow weir 20 is shown, the point is that it should just be erected so that the height of the weir can be adjusted in the flock rod 13.
[0007]
The suspension initially mixed in the suspension feed pipe 2 while adding the flocculant from the flocculant inlet 3 and fed by the introduction upper end 2e of the suspension feed pipe 2 Then, it flows into the prone body 7 and collides with the upper wall, and flows down the annular gap between the inner peripheral wall of the prone body 7 and the outer periphery of the introduction upper end 2e protruding from the tank bottom 1a. When the above-mentioned initially mixed suspension is mixed more uniformly by colliding with the liquid, the upward flow is suppressed while the flow velocity of the inflow is decelerated, and the agitation is performed after the flow velocity is extremely reduced. The blades 8 provide gentle ascending swirl flow agitation, and turbulence is generated in the swirl flow by the guide blades 10 whose angles are adjusted according to the processing conditions. Then, the unreacted microparticles hidden in the suspension are adsorbed and captured by the rotation of the vertical stirring blade 6 provided above the guide blade 10, and a concentration zone is generated near the position where the vertical stirring blade 6 is attached. When the vertical stirring blade 6 is rotated, a rolling action is generated on the floc in the concentration zone to generate a spherical compacted floc, and when the vertical stirring blade 6 has a multi-stage configuration, the same as above. The floc generated by the lower vertical stirring blade 6a fills up the vertical stirring blade 6a and adsorbs and captures unreacted microparticles hidden in the suspension flowing in from the suspension feeding pipe 2. A concentration zone is generated, and then the upper vertical stirring blade 6b effectively rolls against flocs on the surface layer of the concentration zone. When the formed floc layer reaches the detection position of the sludge interface detection sensor 11, the detection signal from the sludge interface detection sensor 11 opens the flock derivation on-off valve 12v for a predetermined set time, and the concentration zone portion near the middle layer A predetermined amount of floc is led out from the overflow weir 20 through the floc lead-out port 13b via the inside of the communication pipe 12 led out of the opening. As another means for opening the flock derivation opening / closing valve 12v, timer control at a predetermined cycle time is also effective. That is, taking into consideration the suspension inflow amount from the suspension feed pipe 2 into the stirring granulation tank 1 and the granulation processing capability in the stirring granulation tank 1, it is necessary until the sludge interface reaches a predetermined level. By setting the timer for calculating the time, the flock derivation on-off valve 12v is opened over time and a predetermined amount of flock is derived from the flock derivation port 13b.
[0008]
This increase / decrease control of the floc derivation amount adjusts the height of the overflow weir 20, that is, adjusts the liquid level difference Δh between the liquid level rise limit L in the stirring granulation tank 1 and the weir height of the overflow weir 20. Is done. The flock derived from the flock outlet 13b is accommodated in the mesh-shaped dewatering bag 17, and the mesh-shaped dewatering bag 17 suspended by adding the weight of the floc is used for tea width squeezing (boiled ingredients used in Japanese cooking). The bag 17p of the mesh-shaped dewatering bag 17 is deepened as in the case of squeezing it with a cloth, and the squeezing effect is produced, and effective dehydration is performed without power coupled with natural gravity dehydration. This will further enhance the dehydration effect. The dehydrated flock may be collected and discarded together with the mesh-shaped dewatering bag 17 or may be transferred to another container for processing. Further, the separated clarified liquid flows into the conducting part 15a of the liquid collecting basin 15 through the conduction through hole 15c, reaches the non-conducting part 15b beyond the upper edge of the overflow weir 15d, Although it is derived from the outlet 16, the clarified liquid effluent liquid level L is determined by the weir height t of the overflow weir 15d, and the clarified liquid effluent liquid level L coincides with the liquid level rise limit in the stirring granulation tank 1. To do. The residual floc is hardened between the end of the floc derivation process in the predetermined time zone and the start of the next floc derivation process, and the secondary side of the floc derivation on-off valve 12v in the communication pipe 12 is closed. In order to avoid this, when the flock derivation on-off valve 12v is closed, the residual flock discharge on-off valve 14v is opened, and the residual flock in the communication pipe 12 is discharged from the residual flock discharge port 14. Desirable [0009]
【The invention's effect】
According to the floc derivation device in the granulation dehydration apparatus that granulates and reacts the suspension in one stirring granulation tank according to the present invention, the derivation amount of the flocs generated in a spherical compaction confirms the derivation status. However, it can be increased or decreased to an appropriate amount corresponding to the progress of work by a simple operation, and there is an advantage that a sufficient effect can be obtained even in a simple dewatering process using a mesh-shaped dewatering bag. Furthermore, there is a secondary effect that dehydration is performed without requiring a large installation space, easy to maintain, inexpensive and low in running cost.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of a main part of the apparatus of the present invention, showing a state in which the height of an overflow weir for regulating the amount of flocs is adjusted to be low.
FIG. 2 is a longitudinal side view of the main part of the device of the present invention, showing a state in which the height of the overflow weir for regulating the amount of floc derived is adjusted high.
3 is a cross-sectional plan view taken along line AA in FIGS. 1 and 2. FIG.
FIG. 4 is a plan view of a stirring granulation tank portion in the apparatus of the present invention.
FIG. 5 is a front view of an overflow weir for regulating the amount of floc derived in the device of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Granulation stirring tank 1a Tank bottom surface 2 Suspension feed pipe 2e Introducing upper end part 4 Rotating shaft 5 Motor 6 Vertical stirring blade 7 Protruding body 8 Inclined stirring blade 9 Operation shaft 10 Guide blade 12 Communication tube 12v Flock Opening and closing valve 13 Flock rod 13a Flock inlet port 13b Flock outlet port 16 Clarified liquid outlet port 17 Dehydrated bag 17P mesh 18 String body 19 Vibrator 20 Overflow weir for regulating flock discharge amount

Claims

The upper end of the introduction of the suspension feeding pipe introduced from the center of the bottom of the stirring granulation tank protrudes higher than the bottom of the stirring granulation tank, and the rotating shaft driven by the prime mover is used for the stirring granulation. A vertical stirring blade that is vertically installed in the center of the tank and horizontally rotates in the liquid in the stirring granulation tank is stretched around the outer periphery of the rotating shaft, and the suspension is fed to the lower end of the rotating shaft. A prone body that is open to the lower surface with a larger diameter than the outer periphery of the tube is fixed, facing the upper edge of the tube, and the outer periphery of the prone body is rotated horizontally in the liquid in the stirring granulation tank. An inclined stirring blade twisted in an upward gradient so as to face the rotation direction is stretched, and the inner peripheral surface of the stirring granulation tank is positioned between the vertical stirring blade and the inclined stirring blade. increasing the separating angle from clothed pivot, bath wall inner peripheral surface of the stirring granulation tank guide please the rotational operation shaft so as to close along the inner periphery proximity to vessel walls A movable guide vane to be adjusted is arranged, and a clarified liquid outlet is opened in the upper part of the agitation granulation tank, and is opened from the concentration zone near the middle layer in the agitation granulation tank. A communication pipe is led out through a valve, a flock rod is externally provided so that the bottom surface is at a lower position than the opening position of the clarified liquid outlet, and a lead-out end of the communication tube is connected to the flock introduction port of the flock rod Connected and opened a flock outlet through an overflow weir standing so that the height of the weir in the flock can be adjusted, and the overflow weir at a position lower than the opening position of the clarified liquid outlet A floc derivation device in a granulation and dehydration apparatus for a suspension, characterized in that the amount of floc derivation from the flock derivation port is adjusted to increase or decrease by adjusting the weir height.

The floc outlet of the floc outlet in the granulation dehydrator of the suspension according to claim 1 is opened into a mesh-shaped dewatering bag, and the upper edge of the mesh-shaped dewatering bag opening is formed by a string on the outer periphery of the flock outlet. Squeeze and fit, and the string body is hooked to a fixed body provided outside the flock hook, and a large number of hooks are formed below the fitting portion of the mesh-shaped dewatering bag so that the floc hook is formed into a drawstring. A floc derivation device in a suspension granulation / dehydration device, wherein the mesh-shaped dewatering bag is suspended below an outlet.

3. A suspension for granulating and dewatering a suspension according to claim 2, wherein a vibrator for giving a vibration of rolling is attached to a mesh-shaped dewatering bag suspended below a flock outlet of the flock outlet. A floc derivation device in a granulation and dehydration device for a suspension.