Nothing Special   »   [go: up one dir, main page]

JP2005034698A - Medium stirring type pulverizer and sludge treatment apparatus using medium stirring type pulverizer - Google Patents

Medium stirring type pulverizer and sludge treatment apparatus using medium stirring type pulverizer Download PDF

Info

Publication number
JP2005034698A
JP2005034698A JP2003197806A JP2003197806A JP2005034698A JP 2005034698 A JP2005034698 A JP 2005034698A JP 2003197806 A JP2003197806 A JP 2003197806A JP 2003197806 A JP2003197806 A JP 2003197806A JP 2005034698 A JP2005034698 A JP 2005034698A
Authority
JP
Japan
Prior art keywords
slurry
medium
stirring
discharge port
type pulverizer
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.)
Granted
Application number
JP2003197806A
Other languages
Japanese (ja)
Other versions
JP4310142B2 (en
Inventor
Masumi Kusunoki
真澄 楠
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP2003197806A priority Critical patent/JP4310142B2/en
Publication of JP2005034698A publication Critical patent/JP2005034698A/en
Application granted granted Critical
Publication of JP4310142B2 publication Critical patent/JP4310142B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

Landscapes

  • Treatment Of Sludge (AREA)
  • Crushing And Grinding (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medium stirring type pulverizer generating no clogging even if it is used for pulverization of excessive sludge generated at sewage treatment and capable of preventing a pulverizing medium from being discharged with a slurry. <P>SOLUTION: The medium stirring type pulverizer is provided with a cylindrical vessel having a pulverization chamber at the inside; a slurry introduction port provided at one end of the pulverization chamber; a slurry discharge port provided on a lid plate for closing the other end of the pulverization chamber; a stirring shaft rotatably arranged in the vessel; and a plurality of stirring members radially outwardly extending from the stirring shaft at a position with an axial gap of the stirring shaft. In the medium stirring type pulverizer, the pulverizing medium is filled in the pulverization chamber, the slurry is introduced from a slurry introduction port while rotating the stirring shaft and pulverization of a solid content contained in the slurry is carried out by discharging the slurry from a slurry discharge port. The slurry discharge port has a size capable of passing hair and a pulp fiber and a cylindrical sleeve is provided on the lid plate so as to surround the slurry discharge port and extend in an approximately axial direction of the stirring shaft. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術の分野】
本発明は、媒体撹拌型粉砕機を使用する汚泥処理装置及び汚泥処理装置に使用するのに適した媒体撹拌型粉砕機に関する。
【0002】
【従来の技術】
内部に粉砕室が形成された筒型のベッセル有し、該ベッセル内に撹拌部材を備える撹拌軸が配置され、粉砕室内にガラスビーズやスチールビーズのような粉砕用媒体を充填して撹拌軸を回転させながら固形分を含むスラリーを粉砕室に流通させて該固形分の微粉砕を行う媒体撹拌型粉砕機は、既に多くの構造のものが知られている。この種の粉砕機は、ベッセルの一端にスラリー導入口を有し、スラリーはこの導入口から粉砕室に導入され、撹拌部材により撹拌されて回転運動する粉砕媒体の間を通って、ベッセルの反対端に形成されたスラリー排出口から排出される。スラリーに含まれる固形粒子は、スラリーが粉砕媒体の間を通る間に媒体同士の接触による強い剪断作用を受け、微細粒子に粉砕される。
【0003】
粉砕室のスラリー排出口側端部に到達したスラリーを粉砕媒体から分離して、スラリーのみを排出口から排出するために、スラリー排出口には分離用スクリーンが設けられるか(例えば、特許文献1及び2を参照)、又は粉砕媒体を通さない大きさの分離用スリットが形成される(例えば、特許文献3を参照)。
【0004】
このように構成された媒体撹拌型粉砕機は、インクや塗料の顔料、磁性粉末、セラミック材料などの粉砕に使用されている。この種の粉砕機を下水処理施設における汚泥処理に使用する試みがある。すなわち、下水処理においては、下水処理施設から排出された汚泥を調整槽において濃縮処理し、次いで消化槽において嫌気性菌により消化させ、発生したメタンガスをガス貯蔵槽に導いて各種の熱源として再生利用する。そして、残りの余剰汚泥が最終処理に回される。ここで、余剰汚泥をポンプにより媒体撹拌型粉砕機に導いて粉砕処理を施すと、汚泥に含まれる菌体細胞膜が粉砕により破壊され、嫌気性菌による消化処理において発生するメタンガスの量が数十%増加し、同時に、最終処理に回される汚泥の量が桁違いに少なくなる(例えば、非特許文献1及び2)。
【0005】
【特許文献1】
特開2001−219087
【特許文献2】
ドイツ特許第1109988号明細書
【特許文献3】
ドイツ特許第2312109号明細書
【非特許文献1】
社団法人日本農業集落排水協会「平成13年度農業集落排水技術研究発表会」講演資料「ミル破砕式汚泥減量化システムの農業集落排水処理施設への適応」ユニチカ(株)エンジニアリング技術部名和慶東及び井出幹夫、平成13年11月29日
【非特許文献2】
社団法人日本下水道協会主催第25回下水道研究発表会講演集「汚泥の前処理−−嫌気性消化法のための湿式ミル前処理の効果−−」フジタ工業(株)中川輝雄ほか。昭和63年5月9日〜11日。
【0006】
【発明が解決しようとする課題】
このように、媒体撹拌型粉砕機を下水処理施設において生じる余剰汚泥の処理に使用すると多大の効果を達成できることが期待される。しかしながら、下水処理において生じる余剰汚泥は高濃度であり、菌体や未消化の有機物、消化され難い毛髪、パルプ繊維などを含んでいる。これらの含有物のうち、毛髪やパルプ繊維は媒体撹拌型粉砕機では粉砕され難く、殆どがそのままスラリー排出口に向うことになる。しかし、従来の媒体撹拌型粉砕機においては、スラリー排出口にスラリーと粉砕用媒体とを分離するためのスクリーン又は分離ギャップが設けられているため、これら未粉砕の含有物がスクリーンや分離ギャップに詰まり、運転ができなくなる、という問題を生じる。
【0007】
そこで、スラリー排出口のスクリーン又は分離ギャップをなくし、排出口に大きな開口を設けると、詰まりの問題は解消するが、粉砕室に充填された粉砕用媒体が粉砕機からスラリーと共に排出されてしまうことになる。
【0008】
本発明は、従来技術のこのような問題に対処するために得られたもので、下水処理において生じる余剰汚泥の粉砕に使用しても目詰まりを生じることがなく、しかも粉砕用媒体がスラリーと共に排出されるのを実質的に防止できる媒体撹拌型粉砕機を提供することを課題とする。
【0009】
本発明は又、このような粉砕機を使用する汚泥処理装置を提供する。
【0010】
【課題を解決するための手段】
上記課題を解決するため、本発明による媒体撹拌型粉砕機は、内部に粉砕室を有する筒型のベッセルと、該粉砕室の一端に設けられたスラリー導入口と、該粉砕室の他端を塞ぐ蓋板に設けられたスラリー排出口と、ベッセル内に回転自在に配置された撹拌軸と、該撹拌軸の軸方向に間隔をもった位置において該撹拌軸から半径方向外方に延びるように設けられた複数の撹拌部材とを備え、粉砕室内に粉砕用媒体を充填して、撹拌軸を回転させながらスラリー導入口からスラリーを導入し、スラリー排出口からスラリーを排出することによりスラリー内に含まれる固形分の粉砕を行うような構成を有する。さらに、本発明の特徴として、スラリー排出口は、粉砕用媒体や、毛髪、パルプ繊維などが通過できる大きさの蓋板に形成された開口であり、蓋板には、スラリー排出口を囲み撹拌軸のほぼ軸方向に延びるように筒状のスリーブが設けられる。粉砕室のスラリー排出口側のベッセル端部近傍に到達したスラリーは、スリーブによりスラリー導入口方向に方向を反転され、撹拌部材の撹拌作用による回転運動のもとで粉砕媒体から分離され、スラリー部分がスリーブの内部を通って排出口付近のスラリー通路を経て前記スラリー排出口を構成する開口から排出される。
【0011】
本発明の好ましい一態様においては、スラリー排出口に最も近接する撹拌部材に、スリーブの半径方向外側の位置で前記撹拌軸のほぼ軸方向に延びるように撹拌バーが設けられ、該撹拌バーによりスリーブまわりのスラリーに回転運動が与えられる。この撹拌バーは、スラリー及び粉砕媒体に半径方向外向きの運動を与える断面形状を有することが好ましい。さらに、この撹拌バーは翼型断面形状を有することが好ましい。
【0012】
本発明の好ましい別の態様においては、スラリー排出口に最も近接する撹拌部材は円板型部材であり、該円板型部材と該部材に近接するスリーブの端部との間に前記スラリー排出口に通じるスラリー通路が形成される。
【0013】
さらに、本発明は、汚泥処理装置を提供するものであり、この装置は、下水処理場から排出された汚泥を受けて固形物を沈殿させて分離する沈殿槽と、上述した構成のいずれかを備える媒体撹拌型粉砕機と、沈殿槽の下部に設けた余剰汚泥スラリーを取り出すためのスラリー取出し口と前記媒体撹拌型粉砕機のスラリー導入口とを接続する導管と、該導管内に配置された汚泥ポンプと、上記した媒体撹拌型粉砕機のスラリー排出口からのスラリーを沈殿槽に戻すスラリー戻り回路とを備え、スラリーを沈殿槽と媒体撹拌型粉砕機との間で循環させることによりスラリー内の余剰汚泥固形分を粉砕するように構成される。この場合、汚泥処理装置には、スラリー戻り回路に嫌気性菌によって汚泥を消化する消化槽を設け、下水処理場からの汚泥をこの消化槽に導入する構成とすることが好ましい。
【0014】
【発明の実施の形態】
以下、本発明の好ましい実施の形態を図について説明する。
【0015】
図1は、下水処理施設から排出される余剰汚泥を処理するための本発明の媒体撹拌型粉砕機を使用する汚泥処理装置の一例を示す概略系統図である。この汚泥処理装置は、下水処理施設からの汚泥を受ける調整槽1と、調整槽1に接続された消化槽2、及び該消化槽2に接続された沈殿槽3を備える。
【0016】
調整槽1が受け取る汚泥は水分を多量に含むものであるが、調整槽1は、この汚泥を濃縮して濃縮汚泥にする。調整槽1には消化槽2が接続される。消化槽2は密閉された構造であり、内部に撹拌羽根2aを有する。この消化槽2は、嫌気性菌により汚泥を消化させるための槽であり、消化の結果として大量のメタンガスが発生する。メタンガスは、図示しないガス貯槽に送られて熱源として利用される。
【0017】
消化槽2内のスラリー部分は、該消化槽2から沈殿槽3に送られる。沈殿槽3においては、消化槽2から送られたスラリーの余剰汚泥部分が沈殿させられ、上澄み部分が図示しない殺菌槽に送られ、殺菌処理を経て外部に放流される。
【0018】
沈殿槽3の底部には、汚泥ポンプ4を有する導管5の一端が接続される。導管5の他端は、本発明の一実施態様による媒体撹拌型粉砕機6のスラリー導入口に接続される。粉砕機6のスラリー排出口は戻り回路7を介して消化槽2に接続される。
【0019】
図2は、本発明を実施した媒体撹拌型粉砕機6の構造を示す縦断面図である。この粉砕機6は、円筒形の中空ベッセル10を備える。ベッセル10の内部には粉砕室11が形成される。図示実施形態では、粉砕機6は縦型であり、ベッセル10はほぼ垂直に保持される。ベッセル10の一端、すなわち図示例における下端には下側蓋板12が取り付けられている。この蓋板12には、スラリー導入口13が形成され、このスラリー導入口13に前述の導管5が接続される。ベッセル10の他端、すなわち図示例における上端には、上側蓋板14が取り付けられる。上側蓋板14の中央部には円形開口の形状のスラリー排出口15が形成されている。
【0020】
ベッセル10内には、上側蓋板14の中央に形成されたスラリー排出口15を通してベッセル10の軸方向に、撹拌軸16が挿入される。上側蓋板14の外側には、スラリー排出口15を囲むように箱型の出口カバー17が設けられ、図示されていないが、該カバー17と撹拌軸16の間は適当なシール部材によりシールされている。箱型の出口カバー17の内部には、スラリー出口室18が形成される。
【0021】
撹拌軸16には、軸方向に間隔をもって複数の撹拌部材19が設けられる。撹拌部材19は、図示実施形態では円板型であるが、他の形状のものでもよい。媒体撹拌型粉砕機の技術分野において周知のように、粉砕室11内には、ガラスビーズ、スチールビーズなどの粉砕媒体20が充填される。下側蓋板12のスラリー導入口13は沈殿槽3からの導管5に接続され、スラリー出口室18は消化槽2に戻る戻り回路7に接続される。撹拌軸16は、図示しない動力駆動装置により回転駆動される。
【0022】
沈殿槽3から汚泥ポンプ4により圧送される余剰汚泥のスラリーは、下側蓋板12のスラリー導入口13から粉砕室11内に導入される。粉砕室11内において、回転駆動される撹拌軸16の撹拌部材19により粉砕媒体20が撹拌され、スラリーはこの粉砕媒体20の間を通る間に強い剪断作用を受けて、該スラリー内に含まれる菌体の細胞膜が破壊される。しかし、下水の余剰汚泥に含まれる毛髪やパルプ繊維などは破壊されず、そのままスラリー排出口15に向かうことになる。したがって、従来の媒体撹拌型粉砕機におけるようにスラリー排出口に媒体分離用のスクリーンや分離スリットを設けると、このスクリーン又はスリットが毛髪やパルプ繊維により目詰まりを起すことになる。
【0023】
本発明の図示実施例においては、この問題に対処するため、スラリー排出口15にスクリーンや媒体分離用のスリットを設けず、スラリー排出口15は、上側蓋板14に形成された開口のままとする。この開口は、粉砕媒体20が通過できる大きさであり、かつ、毛髪やパルプ繊維も目詰まりを起さずに通過できる。具体的には、撹拌軸16と蓋板14の開口縁との間に形成されるスラリー排出口15の半径方向寸法は、10mm以上の幅である。この寸法は、余剰汚泥スラリーに含まれる毛髪やパルプ繊維が目詰まりを起こさずに通過できる大きさとする必要があり、この実施形態では、スラリー排出口15は撹拌軸16まわりの環形の形状であるが、この形状に限ることはなく、撹拌軸16から離れて蓋板14に形成した任意の形状の開口とすることができる。しかし、スラリーに含まれる毛髪やパルプ繊維の目詰まりを防止する観点からは、図示実施形態の構造のように、撹拌軸16を取り巻くように十分な幅の環状開口を形成することが最も好ましい。
【0024】
粉砕機の作動中に粉砕媒体20が粉砕機外に出るのを抑制するために、上側蓋板14には、スラリー排出口15を囲み粉砕室11の内部に延びるように、筒状のスリーブ21が設けられる。撹拌軸16に設けられる撹拌部材19のうち、最もスラリー排出口15に近い円板型の撹拌部材19aには、撹拌軸16にほぼ平行に、上側蓋板14の方向に延びるように、複数の撹拌バー22が周方向に間隔をもって取り付けられている。スリーブ21の軸方向内端部と撹拌部材19aとの間には、スラリー排出口15に向うスラリーを通すスラリー通路23が形成される。このスラリー通路23も、毛髪やパルプ繊維も目詰まりを起さずに通過できる大きさとする。
【0025】
図3は、粉砕機のスラリー排出口15の近傍を拡大して示す断面図である。スラリー導入口13からベッセル10内の粉砕室11に導入された余剰汚泥を含むスラリーは、汚泥ポンプ4の圧送圧力によりベッセル10内を上方に移動する。この間に、スラリーは撹拌部材19により撹拌されている粉砕媒体20の間で剪断作用を受け、汚泥に含まれる菌体の細胞膜が破壊される。スラリー排出口15のある上側蓋板14の近傍に達したスラリーは、粉砕媒体20と共に端部の撹拌部材19aと撹拌バー22により強い撹拌作用を受け、高速で旋回する。粉砕媒体20の比重は、ガラスビーズの場合にはスラリーの約2.5倍であり、スチールビーズの場合にはスラリーの約8倍である。旋回運動により生じる遠心力は100G程度であるので、スラリーよりも粉砕媒体の方が遥かに大きな半径方向外向きの力を受けることになる。したがって、粉砕媒体20は、矢印Aで示すように半径方向外向きに流動する循環動作を行う。これに伴って、スラリーは、矢印Bで示すように、円筒形スリーブ21の外側に沿って入口方向に流動し、端部の撹拌部材19aとスリーブ21の軸方向内端との間に形成されたスラリー通路23を経て、軸方向に流れの向きを反転させて円筒形スリーブ21の中に入り、スラリー排出口15を経て出口室18から戻り回路7に入り、汚泥処理装置を再度循環する。
【0026】
このスラリーの流動経路には毛髪やパルプ繊維により目詰まりを生じるような部分がないので、従来の媒体撹拌型粉砕機におけるような目詰まりの問題は発生しない。また、粉砕媒体20は、撹拌による旋回作用に基づく高い遠心力を受けるため、半径方向外向きに押されることになり、円筒形スリーブ21内に入り込む可能性は極めて低くなる。また、この媒体撹拌型粉砕機が下水の余剰汚泥処理に使用される場合には、粉砕機を出るスラリーに僅かな量の粉砕媒体が混入しても悪影響はない。
【0027】
図4は、ベッセルのスラリー排出口付近で粉砕媒体とスラリーの混合物に作用する半径方向外向きの力を高める構成の一例を示す断面図である。図に示すように、端部の撹拌部材19aに設けられる複数の撹拌バー22は、翼型の断面形状を有する。この撹拌バー22は、翼型の曲率の大きな負圧側がベッセル10の半径方向外側に向くように配置される。回転方向は、図4に矢印Cで示す方向である。この配置により、スラリーと粉砕媒体の混合物は半径方向外向きの強い力を受けることになる。したがって、この配置では、粉砕媒体22が円筒形スリーブ21の内部に入り込む可能性は一層低くなる。
【0028】
媒体撹拌型粉砕機6により処理されたスラリーは、図1に示す戻り回路7により処理装置の消化槽2に戻されて、再度消化処理され、沈殿槽3に送られる、という循環処理が行われる。このような循環を必要な回数行って、沈殿槽3の底に溜まった余剰汚泥を取出し導管9のバルブ8を開くことによって取り出し、焼却炉24などによって焼却処理する。本発明によれば、このように最終処理される余剰汚泥の量は大幅に減少する。また、消化槽2において発生するメタンガスの量は飛躍的に増大する。
【0029】
以上、本発明の実施形態を特定の構造について説明したが、本発明は、図示された実施形態とは異なる形態でも実施することができる。例えば、図示実施形態では粉砕機は縦型であるが、本発明は横型の粉砕機でも支障なく実施することができる。
【図面の簡単な説明】
【図1】本発明の一実施形態による余剰汚泥処理装置の配列を示す系統図である。
【図2】図1の余剰汚泥処理装置に使用される媒体撹拌型粉砕機の一例を示す断面図である。
【図3】図2に示す粉砕機のスラリー排出口近傍の構造を示す拡大断面図である。
【図4】図3のIV−IV線に沿ってとった断面図である。
【符号の説明】
1・・・調整槽、2・・・消化槽、3・・・沈殿槽、4・・・汚泥ポンプ、
5・・・導管、6・・・媒体撹拌型粉砕機、10・・・ベッセル、
11・・・粉砕室、13・・・スラリー導入口、15・・・スラリー排出口、
16・・・撹拌軸、18・・・出口室、19・・・撹拌部材、
20・・・粉砕媒体、21・・・円筒形スリーブ、22・・・撹拌バー、
23・・・スラリー通路
[0001]
[Field of the Invention]
The present invention relates to a sludge treatment apparatus using a medium agitation type pulverizer and a medium agitation type pulverizer suitable for use in a sludge treatment apparatus.
[0002]
[Prior art]
A cylindrical vessel having a crushing chamber formed therein, and a stirring shaft provided with a stirring member are arranged in the vessel, and the grinding shaft is filled with a grinding medium such as glass beads or steel beads. Many media-stirring type pulverizers are known in which a slurry containing solid content is circulated through a pulverization chamber while rotating to finely pulverize the solid content. This type of pulverizer has a slurry inlet at one end of the vessel, and the slurry is introduced into the pulverization chamber from the inlet and passes between the pulverizing media that is agitated by a stirring member and rotates. It is discharged from the slurry discharge port formed at the end. The solid particles contained in the slurry are crushed into fine particles by receiving a strong shearing action due to contact between the media while the slurry passes between the pulverizing media.
[0003]
In order to separate the slurry that has reached the slurry discharge port side end of the pulverization chamber from the pulverization medium and discharge only the slurry from the discharge port, is a separation screen provided at the slurry discharge port (for example, Patent Document 1)? And 2), or a separation slit having a size that does not allow the grinding medium to pass therethrough (see, for example, Patent Document 3).
[0004]
The medium stirring type pulverizer configured as described above is used for pulverizing ink, paint pigments, magnetic powder, ceramic materials, and the like. There are attempts to use this type of grinder for sludge treatment in sewage treatment facilities. That is, in sewage treatment, the sludge discharged from the sewage treatment facility is concentrated in the adjustment tank, then digested by anaerobic bacteria in the digestion tank, and the generated methane gas is guided to the gas storage tank and recycled as various heat sources. To do. Then, the remaining surplus sludge is sent to the final treatment. Here, when surplus sludge is guided to a medium agitation type pulverizer by a pump and pulverized, the cell membrane contained in the sludge is destroyed by pulverization, and the amount of methane gas generated in the digestion process by anaerobic bacteria is several tens. %, And at the same time, the amount of sludge that is sent to the final treatment is remarkably reduced (for example, Non-Patent Documents 1 and 2).
[0005]
[Patent Document 1]
JP2001-219087
[Patent Document 2]
German Patent No. 1109988 [Patent Document 3]
German Patent No. 2312109 [Non-Patent Document 1]
Japan Agricultural Village Drainage Association “Agricultural Village Drainage Technology Research Presentation in 2001” “Adaptation of Mill Crushing Sludge Reduction System to Agricultural Village Drainage Treatment Facility” Unitika Co., Ltd. Mikio Ide, November 29, 2001 [Non-Patent Document 2]
25th Sewerage Research Presentation Lecture Meeting sponsored by the Japan Sewerage Association "Pretreatment of sludge--Effect of wet mill pretreatment for anaerobic digestion-", Fujita Industry Co., Ltd. Teruo Nakagawa et al. May 9-11, 1988.
[0006]
[Problems to be solved by the invention]
As described above, it is expected that a great effect can be achieved when the medium stirring type pulverizer is used for the treatment of surplus sludge generated in the sewage treatment facility. However, the excess sludge generated in the sewage treatment has a high concentration, and includes microbial cells, undigested organic matter, hard-to-digest hair, and pulp fibers. Of these inclusions, hair and pulp fibers are not easily pulverized by the medium stirring type pulverizer, and most of them are directly directed to the slurry discharge port. However, in the conventional medium agitating type pulverizer, a screen or a separation gap for separating the slurry and the pulverization medium is provided at the slurry discharge port. This causes the problem of clogging and inability to drive.
[0007]
Therefore, eliminating the screen or separation gap of the slurry discharge port and providing a large opening at the discharge port eliminates the clogging problem, but the pulverization medium filled in the pulverization chamber is discharged together with the slurry from the pulverizer. become.
[0008]
The present invention has been obtained in order to cope with such a problem of the prior art, and does not cause clogging even when used for pulverizing excess sludge generated in sewage treatment, and the pulverizing medium is combined with the slurry. It is an object of the present invention to provide a medium agitation type pulverizer that can substantially prevent discharge.
[0009]
The present invention also provides a sludge treatment apparatus using such a pulverizer.
[0010]
[Means for Solving the Problems]
In order to solve the above problems, a medium agitation type pulverizer according to the present invention includes a cylindrical vessel having a pulverization chamber therein, a slurry inlet provided at one end of the pulverization chamber, and the other end of the pulverization chamber. A slurry discharge port provided in the lid plate to be closed, a stirring shaft rotatably disposed in the vessel, and extending radially outward from the stirring shaft at a position spaced in the axial direction of the stirring shaft. A plurality of stirring members provided, filling the grinding chamber with a grinding medium, introducing the slurry from the slurry introduction port while rotating the stirring shaft, and discharging the slurry from the slurry discharge port into the slurry. It has a configuration in which the contained solid content is crushed. Further, as a feature of the present invention, the slurry discharge port is an opening formed in a cover plate having a size through which a pulverizing medium, hair, pulp fiber, etc. can pass, and the cover plate surrounds the slurry discharge port and is stirred. A cylindrical sleeve is provided so as to extend substantially in the axial direction of the shaft. The slurry that has reached the vicinity of the vessel end on the slurry discharge port side of the pulverization chamber is reversed in the direction of the slurry introduction port by the sleeve and separated from the pulverization medium under the rotational motion by the stirring action of the stirring member. Passes through the inside of the sleeve, passes through a slurry passage near the discharge port, and is discharged from an opening constituting the slurry discharge port.
[0011]
In a preferred aspect of the present invention, the stirring member closest to the slurry discharge port is provided with a stirring bar extending substantially in the axial direction of the stirring shaft at a position radially outside the sleeve, and the stirring bar provides a sleeve. A rotating motion is applied to the surrounding slurry. The stirring bar preferably has a cross-sectional shape that imparts radially outward motion to the slurry and grinding media. Furthermore, the stirring bar preferably has an airfoil cross-sectional shape.
[0012]
In another preferred embodiment of the present invention, the stirring member closest to the slurry discharge port is a disk-shaped member, and the slurry discharge port is disposed between the disk-shaped member and the end of the sleeve adjacent to the member. A slurry passage leading to is formed.
[0013]
Furthermore, the present invention provides a sludge treatment apparatus, which comprises a sedimentation tank that receives sludge discharged from a sewage treatment plant and precipitates and separates solids, and any of the above-described configurations. A medium stirring pulverizer, a conduit connecting a slurry take-out port for removing excess sludge slurry provided at the bottom of the settling tank, and a slurry introducing port of the medium stirring pulverizer, and disposed in the conduit A sludge pump and a slurry return circuit for returning the slurry from the slurry discharge port of the above-described medium agitation type pulverizer to the precipitation tank, and circulating the slurry between the precipitation tank and the medium agitation type pulverizer Configured to grind excess sludge solids. In this case, the sludge treatment apparatus is preferably provided with a digester tank that digests sludge with anaerobic bacteria in the slurry return circuit, and the sludge from the sewage treatment plant is introduced into the digester tank.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
[0015]
FIG. 1 is a schematic system diagram showing an example of a sludge treatment apparatus using the medium agitation pulverizer of the present invention for treating surplus sludge discharged from a sewage treatment facility. The sludge treatment apparatus includes an adjustment tank 1 that receives sludge from a sewage treatment facility, a digestion tank 2 connected to the adjustment tank 1, and a sedimentation tank 3 connected to the digestion tank 2.
[0016]
The sludge received by the adjustment tank 1 contains a large amount of water, but the adjustment tank 1 concentrates this sludge into a concentrated sludge. A digestion tank 2 is connected to the adjustment tank 1. The digester 2 has a sealed structure and has a stirring blade 2a inside. The digestion tank 2 is a tank for digesting sludge with anaerobic bacteria, and a large amount of methane gas is generated as a result of digestion. Methane gas is sent to a gas storage tank (not shown) and used as a heat source.
[0017]
The slurry portion in the digester 2 is sent from the digester 2 to the settling tank 3. In the sedimentation tank 3, the surplus sludge portion of the slurry sent from the digestion tank 2 is precipitated, and the supernatant portion is sent to a sterilization tank (not shown) and discharged outside through a sterilization treatment.
[0018]
One end of a conduit 5 having a sludge pump 4 is connected to the bottom of the settling tank 3. The other end of the conduit 5 is connected to the slurry inlet of the medium agitating crusher 6 according to one embodiment of the present invention. The slurry discharge port of the pulverizer 6 is connected to the digester 2 via a return circuit 7.
[0019]
FIG. 2 is a longitudinal sectional view showing the structure of the medium agitating pulverizer 6 embodying the present invention. The pulverizer 6 includes a cylindrical hollow vessel 10. A crushing chamber 11 is formed inside the vessel 10. In the illustrated embodiment, the grinder 6 is a vertical type, and the vessel 10 is held substantially vertically. A lower lid 12 is attached to one end of the vessel 10, that is, the lower end in the illustrated example. A slurry inlet 13 is formed in the cover plate 12, and the aforementioned conduit 5 is connected to the slurry inlet 13. An upper lid 14 is attached to the other end of the vessel 10, that is, the upper end in the illustrated example. A slurry discharge port 15 having a circular opening shape is formed at the center of the upper lid plate 14.
[0020]
A stirring shaft 16 is inserted into the vessel 10 in the axial direction of the vessel 10 through a slurry discharge port 15 formed at the center of the upper lid plate 14. A box-shaped outlet cover 17 is provided outside the upper cover plate 14 so as to surround the slurry discharge port 15. Although not shown, the cover 17 and the stirring shaft 16 are sealed with an appropriate seal member. ing. A slurry outlet chamber 18 is formed inside the box-shaped outlet cover 17.
[0021]
The stirring shaft 16 is provided with a plurality of stirring members 19 at intervals in the axial direction. The stirring member 19 is a disc shape in the illustrated embodiment, but may have another shape. As is well known in the technical field of medium agitating crushers, the crushing chamber 11 is filled with crushing media 20 such as glass beads and steel beads. The slurry inlet 13 of the lower lid 12 is connected to the conduit 5 from the settling tank 3, and the slurry outlet chamber 18 is connected to the return circuit 7 that returns to the digester 2. The stirring shaft 16 is rotationally driven by a power drive device (not shown).
[0022]
Surplus sludge slurry pumped from the sedimentation tank 3 by the sludge pump 4 is introduced into the pulverization chamber 11 from the slurry inlet 13 of the lower lid 12. In the pulverization chamber 11, the pulverization medium 20 is agitated by the stirring member 19 of the stirring shaft 16 that is rotationally driven, and the slurry is subjected to a strong shearing action while passing between the pulverization media 20, and is contained in the slurry. The cell membrane of the fungus is destroyed. However, the hair, pulp fibers, and the like contained in the excess sewage sludge are not destroyed and go directly to the slurry discharge port 15. Therefore, when a screen for separating the medium and a separation slit are provided at the slurry outlet as in the conventional medium stirring type pulverizer, the screen or the slit is clogged by hair or pulp fibers.
[0023]
In the illustrated embodiment of the present invention, in order to cope with this problem, the slurry discharge port 15 is not provided with a screen or a slit for separating the medium, and the slurry discharge port 15 remains an opening formed in the upper cover plate 14. To do. This opening is large enough to allow the grinding medium 20 to pass through, and also allows hair and pulp fibers to pass through without clogging. Specifically, the radial dimension of the slurry discharge port 15 formed between the stirring shaft 16 and the opening edge of the cover plate 14 is a width of 10 mm or more. This size needs to be a size that allows the hair and pulp fibers contained in the excess sludge slurry to pass through without clogging. In this embodiment, the slurry discharge port 15 has an annular shape around the stirring shaft 16. However, it is not limited to this shape, and it can be an opening of an arbitrary shape formed in the cover plate 14 away from the stirring shaft 16. However, from the viewpoint of preventing clogging of hair and pulp fibers contained in the slurry, it is most preferable to form an annular opening having a sufficient width so as to surround the stirring shaft 16 as in the structure of the illustrated embodiment.
[0024]
In order to prevent the pulverizing medium 20 from coming out of the pulverizer during operation of the pulverizer, the upper cover plate 14 has a cylindrical sleeve 21 so as to surround the slurry discharge port 15 and extend into the pulverization chamber 11. Is provided. Among the stirring members 19 provided on the stirring shaft 16, the disk-shaped stirring member 19 a closest to the slurry discharge port 15 includes a plurality of pieces so as to extend in the direction of the upper cover plate 14 substantially parallel to the stirring shaft 16. Stirring bars 22 are attached at intervals in the circumferential direction. Between the inner end portion in the axial direction of the sleeve 21 and the stirring member 19a, a slurry passage 23 through which the slurry is directed toward the slurry discharge port 15 is formed. The slurry passage 23 is also sized so that hair and pulp fibers can pass through without clogging.
[0025]
FIG. 3 is an enlarged sectional view showing the vicinity of the slurry discharge port 15 of the pulverizer. The slurry containing excess sludge introduced into the pulverization chamber 11 in the vessel 10 from the slurry inlet 13 moves upward in the vessel 10 by the pressure of the sludge pump 4. During this time, the slurry undergoes a shearing action between the pulverization media 20 being stirred by the stirring member 19, and the cell membrane of the bacterial cells contained in the sludge is destroyed. The slurry that has reached the vicinity of the upper cover plate 14 with the slurry discharge port 15 is subjected to a strong stirring action by the stirring member 19a and the stirring bar 22 at the end together with the grinding medium 20, and swirls at a high speed. The specific gravity of the grinding media 20 is about 2.5 times that of the slurry in the case of glass beads, and about 8 times that of the slurry in the case of steel beads. Since the centrifugal force generated by the swirling motion is about 100 G, the grinding medium receives a far greater radial outward force than the slurry. Therefore, as shown by the arrow A, the grinding medium 20 performs a circulation operation that flows outward in the radial direction. Accordingly, as indicated by an arrow B, the slurry flows in the inlet direction along the outside of the cylindrical sleeve 21, and is formed between the stirring member 19 a at the end and the axial inner end of the sleeve 21. Through the slurry passage 23, the flow direction is reversed in the axial direction and enters the cylindrical sleeve 21, enters the return circuit 7 from the outlet chamber 18 through the slurry discharge port 15, and circulates again in the sludge treatment apparatus.
[0026]
Since the flow path of the slurry does not have a portion that is clogged by hair or pulp fibers, the clogging problem does not occur as in a conventional medium agitating pulverizer. Further, since the grinding medium 20 receives a high centrifugal force based on the swirling action by stirring, the grinding medium 20 is pushed outward in the radial direction, and the possibility of entering the cylindrical sleeve 21 becomes extremely low. In addition, when this medium agitation type pulverizer is used for the treatment of excess sewage sludge, there is no adverse effect even if a small amount of pulverization medium is mixed in the slurry exiting the pulverizer.
[0027]
FIG. 4 is a cross-sectional view showing an example of a configuration for increasing a radially outward force acting on the mixture of the grinding medium and the slurry in the vicinity of the slurry discharge port of the vessel. As shown in the figure, the plurality of stirring bars 22 provided on the stirring member 19a at the end have an airfoil cross-sectional shape. The stirring bar 22 is arranged so that the suction side of the airfoil having a large curvature faces the radially outer side of the vessel 10. The rotation direction is the direction indicated by the arrow C in FIG. With this arrangement, the mixture of slurry and grinding media is subjected to a strong radial outward force. Therefore, in this arrangement, the possibility of the grinding medium 22 entering the inside of the cylindrical sleeve 21 is further reduced.
[0028]
The slurry processed by the medium agitation type pulverizer 6 is returned to the digester 2 of the processing apparatus by the return circuit 7 shown in FIG. 1, digested again, and sent to the sedimentation tank 3. . Such circulation is performed as many times as necessary, and the excess sludge accumulated at the bottom of the settling tank 3 is taken out by opening the valve 8 of the conduit 9 and incinerated by the incinerator 24 or the like. According to the present invention, the amount of excess sludge that is finally treated in this way is greatly reduced. Further, the amount of methane gas generated in the digestion tank 2 increases dramatically.
[0029]
As mentioned above, although embodiment of this invention was described about the specific structure, this invention can be implemented also with a different form from embodiment shown in figure. For example, in the illustrated embodiment, the pulverizer is a vertical type, but the present invention can be practiced without any trouble even with a horizontal type pulverizer.
[Brief description of the drawings]
FIG. 1 is a system diagram showing an arrangement of an excess sludge treatment apparatus according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing an example of a medium agitating pulverizer used in the excess sludge treatment apparatus of FIG.
3 is an enlarged cross-sectional view showing a structure in the vicinity of a slurry outlet of the pulverizer shown in FIG.
4 is a cross-sectional view taken along the line IV-IV in FIG. 3;
[Explanation of symbols]
1 ... adjustment tank, 2 ... digestion tank, 3 ... sedimentation tank, 4 ... sludge pump,
5 ... conduit, 6 ... medium agitating crusher, 10 ... vessel,
11 ... grinding chamber, 13 ... slurry inlet, 15 ... slurry outlet,
16 ... stirring shaft, 18 ... outlet chamber, 19 ... stirring member,
20 ... grinding media, 21 ... cylindrical sleeve, 22 ... stirring bar,
23 ... Slurry passage

Claims (9)

内部に粉砕室を有する筒型のベッセルと、
前記粉砕室の一端に設けられたスラリー導入口と、
前記粉砕室の他端を塞ぐ蓋板に設けられたスラリー排出口と、
前記ベッセル内に回転自在に配置された撹拌軸と、
前記撹拌軸の軸方向に間隔をもった位置において該撹拌軸から半径方向外方に延びるように設けられた複数の撹拌部材と、
を備え、
前記粉砕室内に粉砕用媒体を充填して、前記撹拌軸を回転させながら前記スラリー導入口からスラリーを導入し、前記スラリー排出口からスラリーを排出することによりスラリー内に含まれる固形分の粉砕を行うようになった媒体撹拌型粉砕機であって、
前記スラリー排出口は前記蓋板に形成された開口であり、
前記蓋板には前記スラリー排出口を囲み撹拌軸のほぼ軸方向に延びるように筒状のスリーブが設けられ、粉砕室の前記スラリー排出口側のベッセル端部近傍に到達したスラリーが前記スリーブにより前記スラリー導入口方向に方向を反転され、前記撹拌部材の撹拌作用による回転運動のもとで粉砕媒体から分離され、スラリー部分が前記スリーブの内部を通って前記スラリー排出口を構成する前記開口から排出されるようになった、
ことを特徴とする媒体撹拌型粉砕機。
A cylindrical vessel having a crushing chamber inside;
A slurry inlet provided at one end of the grinding chamber;
A slurry outlet provided in a cover plate for closing the other end of the grinding chamber;
An agitation shaft rotatably disposed in the vessel;
A plurality of stirring members provided to extend radially outward from the stirring shaft at positions spaced in the axial direction of the stirring shaft;
With
The pulverizing chamber is filled with a pulverizing medium, the slurry is introduced from the slurry introduction port while rotating the stirring shaft, and the slurry is discharged from the slurry discharge port, thereby pulverizing solids contained in the slurry. It is a medium stirring type pulverizer that has come to perform,
The slurry outlet is an opening formed in the lid plate,
The cover plate is provided with a cylindrical sleeve so as to surround the slurry discharge port and extend substantially in the axial direction of the stirring shaft, and the slurry that has reached the vicinity of the vessel end on the slurry discharge port side of the grinding chamber is caused by the sleeve. From the opening that is reversed in the direction of the slurry inlet and separated from the pulverizing medium under the rotational motion by the stirring action of the stirring member, and the slurry portion passes through the inside of the sleeve and constitutes the slurry discharge port Discharged.
A medium stirring type pulverizer characterized by the above.
請求項1に記載した媒体撹拌型粉砕機であって、前記スラリー排出口を形成する前記開口は、少なくとも10mmの幅を有することを特徴とする媒体撹拌型粉砕機。2. The medium agitation type pulverizer according to claim 1, wherein the opening forming the slurry discharge port has a width of at least 10 mm. 請求項1又は請求項2に記載した媒体撹拌型粉砕機であって、前記スラリー排出口に最も近接する撹拌部材に、前記スリーブの半径方向外側の位置で前記撹拌軸のほぼ軸方向に延びるように撹拌バーを設け、該撹拌バーにより前記スリーブまわりのスラリーに回転運動を与えるようになったことを特徴とする媒体撹拌型粉砕機。3. The medium agitation type pulverizer according to claim 1 or 2, wherein the agitation member closest to the slurry discharge port extends substantially in the axial direction of the agitation shaft at a position radially outward of the sleeve. The medium stirring type pulverizer is characterized in that the stirring bar is provided with a stirring bar and rotational motion is given to the slurry around the sleeve by the stirring bar. 請求項3に記載した媒体撹拌型粉砕機であって、前記撹拌バーは、スラリー及び粉砕媒体に半径方向外向きの運動を与える断面形状を有することを特徴とする媒体撹拌型粉砕機。4. The medium agitation type pulverizer according to claim 3, wherein the agitation bar has a cross-sectional shape that imparts a radially outward motion to the slurry and the pulverization medium. 請求項4に記載した媒体撹拌型粉砕機であって、前記撹拌バーは翼型断面形状を有することを特徴とする媒体撹拌型粉砕機。5. The medium agitation type pulverizer according to claim 4, wherein the agitation bar has an airfoil cross-sectional shape. 請求項1から請求項5までのいずれか1項に記載した媒体撹拌型粉砕機であって、前記スラリー排出口に最も近接する撹拌部材は円板型部材であり、前記円板型部材と該部材に近接する前記スリーブの端部との間に前記スラリー排出口に通じるスラリー通路が形成されたことを特徴とする媒体撹拌型粉砕機。The medium stirring type pulverizer according to any one of claims 1 to 5, wherein the stirring member closest to the slurry discharge port is a disk-type member, and the disk-type member and the disk-type member A medium agitation type pulverizer, wherein a slurry passage leading to the slurry discharge port is formed between an end of the sleeve adjacent to a member. 請求項1から請求項6までのいずれか1項に記載した媒体撹拌型粉砕機であって、前記スラリー排出口は、前記蓋板の中央部材に形成された開口の縁と該開口を通り抜ける前記撹拌軸との間に形成された環状の通路であることを特徴とする媒体撹拌型粉砕機。The medium stirring type pulverizer according to any one of claims 1 to 6, wherein the slurry discharge port passes through an edge of an opening formed in a central member of the lid plate and the opening. A medium agitation type pulverizer characterized by being an annular passage formed between the agitation shaft and the agitation shaft. 下水処理場から排出された汚泥を受けて固形物を沈殿させて分離する沈殿槽と、
請求項1から請求項7までのいずれか1項に記載された媒体撹拌型粉砕機と、
前記沈殿槽の下部に設けた余剰汚泥スラリーを取り出すためのスラリー取出し口と前記媒体撹拌型粉砕機のスラリー導入口とを接続する導管と、
前記導管内に配置された汚泥ポンプと、
前記媒体撹拌型粉砕機のスラリー排出口からのスラリーを前記沈殿槽に戻すスラリー戻り回路と、
を備え、スラリーを前記沈殿槽と前記媒体撹拌型粉砕機との間で循環させることによりスラリー内の余剰汚泥固形分を粉砕するようになった、
ことを特徴とする汚泥処理装置。
A sedimentation tank that receives sludge discharged from a sewage treatment plant and precipitates and separates solids;
A medium stirring type pulverizer according to any one of claims 1 to 7,
A conduit connecting a slurry outlet for taking out the excess sludge slurry provided in the lower part of the settling tank and a slurry inlet of the medium agitating crusher;
A sludge pump disposed in the conduit;
A slurry return circuit for returning the slurry from the slurry discharge port of the medium agitating crusher to the settling tank;
The slurry is circulated between the settling tank and the medium agitating crusher to pulverize excess sludge solids in the slurry.
A sludge treatment apparatus characterized by that.
請求項8に記載された汚泥処理装置であって、前記スラリー戻り回路に嫌気性菌によって汚泥を消化する消化槽が設けられ、下水処理場からの汚泥はこの消化槽に導入されることを特徴とする汚泥処理装置。The sludge treatment apparatus according to claim 8, wherein a digestion tank for digesting sludge with anaerobic bacteria is provided in the slurry return circuit, and sludge from a sewage treatment plant is introduced into the digestion tank. Sludge treatment equipment.
JP2003197806A 2003-07-16 2003-07-16 Medium stirring type pulverizer and sludge treatment apparatus using medium stirring type pulverizer Expired - Fee Related JP4310142B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003197806A JP4310142B2 (en) 2003-07-16 2003-07-16 Medium stirring type pulverizer and sludge treatment apparatus using medium stirring type pulverizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003197806A JP4310142B2 (en) 2003-07-16 2003-07-16 Medium stirring type pulverizer and sludge treatment apparatus using medium stirring type pulverizer

Publications (2)

Publication Number Publication Date
JP2005034698A true JP2005034698A (en) 2005-02-10
JP4310142B2 JP4310142B2 (en) 2009-08-05

Family

ID=34207823

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003197806A Expired - Fee Related JP4310142B2 (en) 2003-07-16 2003-07-16 Medium stirring type pulverizer and sludge treatment apparatus using medium stirring type pulverizer

Country Status (1)

Country Link
JP (1) JP4310142B2 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008136973A (en) * 2006-12-04 2008-06-19 Nagao System:Kk Rotary mixing vessel, pot cover, and mixing process
JP2011016128A (en) * 2009-07-06 2011-01-27 Willy A Bachofen Ag Stirring ball mill
KR200470180Y1 (en) 2011-12-15 2013-12-03 최병석 Ball mill dispersion device for filter to prevent wear with filter protection
JP2014042867A (en) * 2012-08-24 2014-03-13 Sumitomo Osaka Cement Co Ltd Circulation type media agitating mill
CN108579927A (en) * 2017-12-29 2018-09-28 江苏飞鹿重工机械制造有限公司 a kind of separator and sand mill
JP2019005696A (en) * 2017-06-23 2019-01-17 アシザワ・ファインテック株式会社 Media agitation type crusher
KR20190051091A (en) * 2009-02-24 2019-05-14 윌리 에이. 바호펜 아게 Agitator ball mill
KR102089092B1 (en) * 2020-01-02 2020-03-16 주식회사 천지테크 Apparatus for protecting underground water well
CN111408461A (en) * 2018-07-26 2020-07-14 蒋菊华 A grinding device and method for Notoginseng radix processing capable of performing juice collecting treatment
CN117505477A (en) * 2023-03-29 2024-02-06 新干县琴联米业有限公司 Rice husk recycling reprocessing equipment for rice screening

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008136973A (en) * 2006-12-04 2008-06-19 Nagao System:Kk Rotary mixing vessel, pot cover, and mixing process
KR20190051091A (en) * 2009-02-24 2019-05-14 윌리 에이. 바호펜 아게 Agitator ball mill
KR102154690B1 (en) * 2009-02-24 2020-09-11 윌리 에이. 바호펜 아게 Agitator ball mill
JP2011016128A (en) * 2009-07-06 2011-01-27 Willy A Bachofen Ag Stirring ball mill
KR200470180Y1 (en) 2011-12-15 2013-12-03 최병석 Ball mill dispersion device for filter to prevent wear with filter protection
JP2014042867A (en) * 2012-08-24 2014-03-13 Sumitomo Osaka Cement Co Ltd Circulation type media agitating mill
JP2019005696A (en) * 2017-06-23 2019-01-17 アシザワ・ファインテック株式会社 Media agitation type crusher
CN108579927A (en) * 2017-12-29 2018-09-28 江苏飞鹿重工机械制造有限公司 a kind of separator and sand mill
CN111408461A (en) * 2018-07-26 2020-07-14 蒋菊华 A grinding device and method for Notoginseng radix processing capable of performing juice collecting treatment
CN111408461B (en) * 2018-07-26 2021-05-14 绍兴市米莉农业科技有限公司 A grinding device and method for Notoginseng radix processing capable of performing juice collecting treatment
KR102089092B1 (en) * 2020-01-02 2020-03-16 주식회사 천지테크 Apparatus for protecting underground water well
CN117505477A (en) * 2023-03-29 2024-02-06 新干县琴联米业有限公司 Rice husk recycling reprocessing equipment for rice screening

Also Published As

Publication number Publication date
JP4310142B2 (en) 2009-08-05

Similar Documents

Publication Publication Date Title
JP4310142B2 (en) Medium stirring type pulverizer and sludge treatment apparatus using medium stirring type pulverizer
KR20060119723A (en) Circular type media stirred mill
JP2002506387A (en) Apparatus and method for decomposing precipitates in suspension and separating solids
KR100971998B1 (en) Agitator digester apparatus
US20170158540A1 (en) Mixing apparatus for crushing sludge
JP6238116B2 (en) Fluid purification device
EP3370889B1 (en) Method and device for processing solid waste
JP5574398B2 (en) Method and system for methane fermentation of organic solid waste
KR101501223B1 (en) Apparatus for treating food waste
KR101523759B1 (en) Apparatus for grinding, drying and reducing food waste
JP4918226B2 (en) Media agitation type wet crusher
JP4953805B2 (en) Medium stirring type crusher
JP2967803B2 (en) Stirrer type ball mill
CN201260978Y (en) Apparatus for treating food garbage for household
KR20170049730A (en) Sewage treatment plant of portable toilets
KR100352626B1 (en) An ex-process system of food waste
JP4274627B2 (en) Sludge crushing method and anaerobic digestion method using the same
US6578781B2 (en) Method for the disintegration sewage sludge
KR200486738Y1 (en) Apparatus of treating food waste
JP2004329975A (en) Organic waste pretreatment method and pretreatment apparatus therefor
KR102287258B1 (en) Food waste disposer
JP2006224090A (en) Methane fermentation system
KR20100036031A (en) Apparatus for crushing sludge of anaerobic digester and apparatus for reducing sludge having the anaerobic digester
JP4037111B2 (en) Garbage disposal equipment
JP2007021413A (en) Apparatus and method for treating sludge

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20060118

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A711

Effective date: 20060526

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20060526

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20060704

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20080703

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080707

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080904

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20090202

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20090330

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: 20090420

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: 20090511

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

Ref document number: 4310142

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

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

Free format text: PAYMENT UNTIL: 20120515

Year of fee payment: 3

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

Free format text: PAYMENT UNTIL: 20120515

Year of fee payment: 3

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313117

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

Free format text: PAYMENT UNTIL: 20120515

Year of fee payment: 3

R360 Written notification for declining of transfer of rights

Free format text: JAPANESE INTERMEDIATE CODE: R360

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

Free format text: PAYMENT UNTIL: 20120515

Year of fee payment: 3

R360 Written notification for declining of transfer of rights

Free format text: JAPANESE INTERMEDIATE CODE: R360

R371 Transfer withdrawn

Free format text: JAPANESE INTERMEDIATE CODE: R371

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313117

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

Free format text: PAYMENT UNTIL: 20120515

Year of fee payment: 3

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

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

Free format text: PAYMENT UNTIL: 20120515

Year of fee payment: 3

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

Free format text: PAYMENT UNTIL: 20130515

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

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

Free format text: PAYMENT UNTIL: 20140515

Year of fee payment: 5

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

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313115

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

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

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313117

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees