JPS6068020A - Electroosmotic dehydrator - Google Patents
Electroosmotic dehydratorInfo
- Publication number
- JPS6068020A JPS6068020A JP58174585A JP17458583A JPS6068020A JP S6068020 A JPS6068020 A JP S6068020A JP 58174585 A JP58174585 A JP 58174585A JP 17458583 A JP17458583 A JP 17458583A JP S6068020 A JPS6068020 A JP S6068020A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- anode side
- electrode member
- electroosmotic
- 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.)
- Granted
Links
Landscapes
- Treatment Of Sludge (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
この発明は例えば下水処理場で生じた汚泥等の泥漿を脱
水処理してケーキ化する電気浸透式脱水機に関する。The present invention relates to an electroosmotic dewatering machine that dehydrates slurry such as sludge produced in a sewage treatment plant and turns it into a cake.
電気1jt−透を応用して泥漿を連続式に脱水処理する
電気浸透脱水機として第1図あるいは第2図のごとき構
成のものが知られている。第1図において、■は陽極側
の電極部材を兼ねた金属製の回転ドラム、2は前記ドラ
ム1の周面に対向してスプロケット3に張架された陰極
側電極部材を蒙ねた金属製のプレスベルト、4はプレス
ベルト2に重ね合わせて張架された濾水透過用のフィル
タベルト、5はベルト駆動モータであり、前記ドラム1
とフィルタベルト4との対向面域に泥漿搬送通路6が一
11成され、さらに泥漿搬送通路4の入口側には泥漿供
給水ソバ7を設置し、これ等で脱水機本体を構成してい
る。またこのホッパ7へ向けてその人1」側には泥漿供
給手段としてのベルト式コンベア8が配備されており、
さらに前記の陰極電極を兼ねたプレスベルト2を接地側
として相手電極側の電極ドラム1には直流電源装置9が
接続されτいる。なおIOは系外へ通じる濾水受皿、1
1は脱水ケーキ回収容器、I2はコンベア8の駆動モー
タである。上記第1図の例では陽極側電極部材が回転ド
ラムIとして構成されているのに対し、第2図の例では
陽極部材がエンドレスプレスベルトl゛として構成され
、これと対向する固定設置の陰極1ull電極部材13
に沿って張架されたフィルタベルト4とほぼ平行して対
向設置されている。その他の構成は第1図のものとほぼ
同様である。
上記第1図および第2図の各構成で、泥漿供給用コンベ
ア8からホッパ7を経て泥漿搬送通路6へ被脱水処理物
としての泥漿14を送り込むとともに、一方では駆動モ
ータ5を運転し、泥@14を搬送通路内でサンドウィッ
チ状に挟んで出口へ向けて矢印P方向へ搬送しつつ、電
源装置9より給電を行えば、泥漿14には機械的な圧搾
力に加えて対向電極間に形成された電場が作用し、泥漿
に含まれている水は正に帯電されて陰極側に流動し、こ
の電極部材へ放電するとともに、フィルタベルト4を透
過して脱水されるいわゆる電気浸透脱水が行われること
になる。なおフィルタベルト4を透過した濾水は濾水受
皿10へ滴下し、ここから系外へ排水される。これに対
し脱水された泥漿ばケーキ化され、脱水ケーキ14°と
なって通路6の出口より送り出され、シュート15を経
て回収容器ifへ回収されみ。かくして含水素の高い汚
泥等の泥漿は連続式に成木処理されて例えば含水率50
%以下の脱水ケーキとなる。この脱水ケーキは焼却処分
ないしはコンポスト化して肥料に再利用される。
ところで、下水処理場で発生した汚泥等を被脱水処理物
として前記の電気浸透脱水処理を行った場合に、電気浸
透脱水作用と併せて泥漿中に水の電気分解および塩素イ
オンのガス化現象の住しることが認められる。このため
に、陰極側には水素ガスが発生し、陽極側には酸素ガス
と塩素ガスが発生する。この場合に第1図、第2図に示
した従来機の構造では、陰極側に生じた水素ガスは濾水
と一緒に図示のフィルタベルト4を透過して系外へ排出
されるのに対し、陽極側に住じた酸素ガス。
塩素ガスは陽極側電極部材の表面と泥漿との間に閉じ込
められたまま抜は出やことができずに滞留し、核部に電
気的な絶縁性のガスJ−を形成する。
この結果、陽極側の電極部材と泥漿との電気的な接触が
態化して泥漿への通電性が低下し、電気浸透脱水の能力
低下−を来ずことが判明した。しかも金属製の電極部材
は酸素、塩素ガスにより腐食を受ける。As an electro-osmotic dehydrator that continuously dehydrates slurry by applying electricity, a structure as shown in FIG. 1 or 2 is known. In FIG. 1, ■ is a metal rotating drum that also serves as an anode side electrode member, and 2 is a metal drum that has a cathode side electrode member stretched across a sprocket 3 facing the circumferential surface of the drum 1. a press belt 4; a filter belt 4 for permeating filtered water stretched over the press belt 2; 5 a belt drive motor;
A slurry conveying passage 6 is formed in the area facing the filter belt 4, and a slurry supply water bath 7 is installed on the entrance side of the slurry conveying passage 4, and these constitute the main body of the dehydrator. . In addition, a belt-type conveyor 8 as a slurry supply means is installed on the person 1'' side toward the hopper 7.
Further, a DC power supply device 9 is connected to the electrode drum 1 on the opposite electrode side with the press belt 2 serving as the cathode electrode being on the ground side. Note that IO is the filtered water tray leading to the outside of the system, 1
1 is a dehydrated cake collection container, and I2 is a drive motor for the conveyor 8. In the example shown in FIG. 1 above, the anode side electrode member is configured as a rotating drum I, whereas in the example shown in FIG. 1ull electrode member 13
The filter belt 4 is placed substantially parallel to and opposite to the filter belt 4 which is stretched along the filter belt 4. The rest of the structure is almost the same as that in FIG. In each of the configurations shown in FIGS. 1 and 2 above, the slurry 14 as a material to be dehydrated is fed from the slurry supply conveyor 8 through the hopper 7 to the slurry conveyance passage 6, and on the other hand, the drive motor 5 is operated, and the slurry If @14 is sandwiched in the conveyance path and conveyed toward the exit in the direction of arrow P, and power is supplied from the power supply 9, the slurry 14 will be formed between the opposing electrodes in addition to the mechanical squeezing force. The applied electric field acts on the water contained in the slurry, which becomes positively charged and flows toward the cathode, where it is discharged to the electrode member and is also transmitted through the filter belt 4 to be dehydrated, so-called electroosmotic dehydration. You will be killed. The filtrate that has passed through the filter belt 4 drips into the filtrate tray 10, from which it is drained out of the system. On the other hand, the dehydrated slurry is turned into a cake, becomes a dehydrated cake 14°, and is sent out from the outlet of the passage 6, and is collected into the collection container if through the chute 15. In this way, slurry such as sludge with a high hydrogen content is treated in a continuous manner to reach a moisture content of, for example, 50.
% or less dehydrated cake. This dehydrated cake is incinerated or composted and reused as fertilizer. By the way, when the electroosmotic dehydration treatment described above is performed on sludge etc. generated at a sewage treatment plant as the material to be dehydrated, electrolysis of water and gasification of chlorine ions in the slurry occur in addition to the electroosmotic dehydration effect. allowed to live there. For this reason, hydrogen gas is generated on the cathode side, and oxygen gas and chlorine gas are generated on the anode side. In this case, in the structure of the conventional machine shown in Figs. 1 and 2, the hydrogen gas generated on the cathode side passes through the filter belt 4 shown in the figure together with the filtered water and is discharged out of the system. , oxygen gas lived on the anode side. The chlorine gas remains trapped between the surface of the anode side electrode member and the slurry and cannot be extracted, forming an electrically insulating gas J- in the core. As a result, it was found that electrical contact between the electrode member on the anode side and the slurry was established, and the electrical conductivity to the slurry was reduced, resulting in no reduction in the electroosmotic dehydration ability. Moreover, metal electrode members are subject to corrosion by oxygen and chlorine gas.
この発明は上記の点にかんがみなされたものであり、電
気浸透に伴って陽極側に発注したガスを直ちに系外へ排
除し、これにより高い電気浸透効果のKif持と、発生
ガスによる電極腐食の軽減を図るようにした電気浸透脱
水機、特にその陽極側電極部材の構成を提供することを
目的とする。This invention was developed in consideration of the above points, and the gas delivered to the anode side during electroosmosis is immediately expelled from the system, thereby maintaining a high electroosmosis effect and preventing electrode corrosion due to the generated gas. It is an object of the present invention to provide an electroosmotic dehydrator, in particular, the structure of its anode side electrode member, which is designed to reduce the amount of water used.
上記目的を達成するために、この発明は陽極側車極部H
の板面に孔ないし溝としてのガス抜き路を形成し、陽極
側に生じたガスを前記ガス抜き路を1…1−、−を泊ら
に糸外・\排除でAるようにしたものである。In order to achieve the above object, the present invention provides an anode side car pole portion H.
A gas venting path is formed in the form of a hole or groove on the plate surface of the plate, and the gas generated on the anode side is removed from the thread outside the gas venting path by placing the gas venting path at 1...1-, -. It is.
第3図、第4図はそれぞれ第1図、第2図に対応したこ
の発明の異なる実施例、第5図は各実施例における陽極
側電極部材の詳細構造を示すものであり、回転ドラムl
あるいばブレスベルトエ”としてなる陽極側電極部材を
構成している金属製の電極セグメント16には、その板
面を貫通したガス抜き路としての多数の孔17が板面に
分散して穿設されている。さらに前記電極部材の表面を
覆って、例えば波布のごときガス透過性の濾過材18が
電極部材の外周面に宙ね合わせて被着されている。
上記の構成によれば、泥漿の脱水処理過程で電気浸透に
より陽極側に発生した酸素ガスおよび塩素ガスは、直ち
に泥漿から分離して濾過材I8を透過し、ガス抜き孔1
7を通じて系外へ排除されることになる。これによって
脱水運転中に発生ガスが陽極側電極部材を兼ねた回転ド
ラム1あるいはプレスベルトI′と泥漿搬送通路6内で
搬送される泥漿との間に滞留したままになることがなく
なり、泥漿と電極部材との電気的接触性が良好に保持さ
れることになる。したがって泥漿への良好な通電性が維
持できて効率的な電気浸透脱水が行われる。
また発生ガスの排除により、それだけガスと電極部材と
の接触時間が少なくなるので、腐食の度合が軽減される
。さらに加えて、図示実施例のように陽極側電極部材の
外周に濾布のごとき濾過材18を被着したことにより、
泥漿が電極部材に直接触れることがなく、これにより電
気浸透脱水によって脱水乾燥化した泥漿がスケールとな
って金属製電極部材の表面に固着して泥漿への通電性を
阻害するのを防止できる。なお図示実施例はガス抜き路
が孔17である例を示したが、孔に限らず電極部材の板
面に系外へ通じる溝を形成して実施することもできる。
また上記構成は図示例の連続処理方式のみならず、バッ
チ処理方式の電気浸透式脱水機に実施しても同様な効果
が得られる。3 and 4 show different embodiments of the present invention corresponding to FIGS. 1 and 2, respectively, and FIG. 5 shows the detailed structure of the anode side electrode member in each embodiment.
The metal electrode segment 16 constituting the anode side electrode member, which serves as a breather belt, has a large number of holes 17 distributed over the plate surface as gas vent passages. Furthermore, a gas-permeable filter material 18 such as a corrugated cloth is attached to the outer peripheral surface of the electrode member so as to cover the surface of the electrode member. Oxygen gas and chlorine gas generated on the anode side by electroosmosis during the slurry dehydration process are immediately separated from the slurry, permeate through the filter material I8, and pass through the gas vent hole 1.
7 will be excluded from the system. This prevents the generated gas from remaining between the rotary drum 1 or press belt I', which also serves as the anode side electrode member, and the slurry conveyed in the slurry conveying passage 6 during dewatering operation, and prevents the gas from remaining in the slurry. Electrical contact with the electrode member is maintained well. Therefore, good electrical conductivity to the slurry can be maintained and efficient electroosmotic dehydration can be performed. Further, by eliminating the generated gas, the contact time between the gas and the electrode member is reduced accordingly, so that the degree of corrosion is reduced. In addition, by covering the outer periphery of the anode side electrode member with a filter material 18 such as a filter cloth as in the illustrated embodiment,
The slurry does not come into direct contact with the electrode member, and this prevents the slurry dehydrated and dried by electroosmotic dehydration from forming scale and sticking to the surface of the metal electrode member, thereby inhibiting the electrical conductivity of the slurry. Although the illustrated embodiment shows an example in which the gas vent path is the hole 17, the gas venting path is not limited to the hole, but it is also possible to form a groove leading to the outside of the system in the plate surface of the electrode member. Further, the above-mentioned configuration can be applied not only to the continuous processing method shown in the illustrated example but also to a batch processing method electroosmotic dehydrator to obtain similar effects.
上述のようにこの発明によれば、陽極側電極部材に発生
ガス排除用のガス抜き路を形成したことにより、泥漿の
電気浸透脱水に伴って陽極側に発生した酸素、塩素等の
ガスを直ちに系外へ排除して電極と泥漿との良好な電気
的接触、したがって高い通電性の維持が図れ、これによ
って高効率な電気浸透脱水運転を実現することができる
。As described above, according to the present invention, gases such as oxygen and chlorine generated on the anode side due to electroosmotic dehydration of slurry are immediately removed by forming a gas vent path for eliminating generated gas in the anode side electrode member. By removing it from the system, it is possible to maintain good electrical contact between the electrode and the slurry, thus maintaining high electrical conductivity, thereby realizing highly efficient electroosmotic dehydration operation.
第1図および第2図はそれぞれ異なるタイプの従来にお
ける電気浸透脱水機の概要構成図、第3図および第4図
はそれぞれ第1図および第2図に対応したこの発明の実
施例の構成図、第5図は第3図、第4図における陽極側
電極部材の要部拡大断面図である。Figures 1 and 2 are schematic diagrams of different types of conventional electroosmotic dehydrators, and Figures 3 and 4 are diagrams of embodiments of the present invention corresponding to Figures 1 and 2, respectively. , FIG. 5 is an enlarged sectional view of the main part of the anode side electrode member in FIGS. 3 and 4.
Claims (1)
間に電圧を印加し、前記電極間の泥漿通路に供給された
泥漿の含有水を電気浸透作用により陰極側へ集め、ここ
から濾水透過用の濾過材を通して系外へ排水するように
した電気浸透式脱水機において、陽極側電極部材に電気
浸透に伴って陽極側に生じたガスを系外へ排除するため
の孔ないし溝のガス抜き路を形成したことを特徴とする
電気浸透式脱水機。 2、特許請求の範囲第1項記載の脱水機において、陰極
側電極部材の表面を被覆してガス透過用の濾過材を被着
したことを特徴とする電気浸透式脱水機。[Claims] 1) A voltage is applied between an anode and a cathode side electrode member arranged opposite each other, and the water contained in the slurry supplied to the slurry passage between the electrodes is transferred to the cathode side by electroosmotic action. In an electroosmotic dehydrator, the gas generated on the anode side due to electroosmosis is removed from the system through the anode side electrode member. An electroosmotic dehydrator characterized by forming a gas venting path of holes or grooves. 2. An electroosmotic dehydrator according to claim 1, characterized in that the surface of the cathode side electrode member is coated with a filter material for gas permeation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58174585A JPS6068020A (en) | 1983-09-21 | 1983-09-21 | Electroosmotic dehydrator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58174585A JPS6068020A (en) | 1983-09-21 | 1983-09-21 | Electroosmotic dehydrator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6068020A true JPS6068020A (en) | 1985-04-18 |
JPS6345605B2 JPS6345605B2 (en) | 1988-09-09 |
Family
ID=15981128
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58174585A Granted JPS6068020A (en) | 1983-09-21 | 1983-09-21 | Electroosmotic dehydrator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6068020A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0578182A2 (en) * | 1992-07-07 | 1994-01-12 | Fuji Electric Co., Ltd. | Electro-endosmosis type dehydrator |
CN102060427A (en) * | 2010-12-09 | 2011-05-18 | 宜兴能达环保科技有限公司 | Electroosmosis dewatering method and device of water-containing material |
WO2011081053A1 (en) * | 2009-12-28 | 2011-07-07 | 栗田工業株式会社 | Electrification treatment method and apparatus, and anode therefor |
CN103170499A (en) * | 2013-03-12 | 2013-06-26 | 付融冰 | Method for electrically removing heavy metals and organic pollutants from soil or sludge |
-
1983
- 1983-09-21 JP JP58174585A patent/JPS6068020A/en active Granted
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0578182A2 (en) * | 1992-07-07 | 1994-01-12 | Fuji Electric Co., Ltd. | Electro-endosmosis type dehydrator |
EP0578182A3 (en) * | 1992-07-07 | 1994-02-23 | Fuji Electric Co Ltd | |
WO2011081053A1 (en) * | 2009-12-28 | 2011-07-07 | 栗田工業株式会社 | Electrification treatment method and apparatus, and anode therefor |
JP2011136292A (en) * | 2009-12-28 | 2011-07-14 | Kurita Water Ind Ltd | Electrification treatment method, apparatus, and anode of the same |
CN102639206A (en) * | 2009-12-28 | 2012-08-15 | 栗田工业株式会社 | Electrification treatment method and apparatus, and anode therefor |
CN102060427A (en) * | 2010-12-09 | 2011-05-18 | 宜兴能达环保科技有限公司 | Electroosmosis dewatering method and device of water-containing material |
CN102060427B (en) * | 2010-12-09 | 2014-12-17 | 宜兴能达环保科技有限公司 | Electroosmosis dewatering method and device of water-containing material |
CN103170499A (en) * | 2013-03-12 | 2013-06-26 | 付融冰 | Method for electrically removing heavy metals and organic pollutants from soil or sludge |
CN103170499B (en) * | 2013-03-12 | 2014-11-12 | 付融冰 | Method for electrically removing heavy metals and organic pollutants from soil or sludge |
Also Published As
Publication number | Publication date |
---|---|
JPS6345605B2 (en) | 1988-09-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4244804A (en) | Slime and sludge dewatering | |
JPS621426A (en) | Electroosmotic dehydration apparatus | |
DE60110223T2 (en) | DEVICE FOR ELECTRO-DRAINAGE | |
CA2171061A1 (en) | Method, apparatus and system for continuously treating water body | |
WO2018034300A1 (en) | Combined dehydration device | |
JPS60114315A (en) | Dehydrating method of organic sludge | |
JPS6025597A (en) | Electroosmotic-type dehydrator | |
JPS6068020A (en) | Electroosmotic dehydrator | |
GB1345086A (en) | Sludge dewatering apparatus and process | |
EP0046155A1 (en) | Process and apparatus for slime and sludge dewatering | |
JPH01189311A (en) | Electroosmotic dehydrator | |
JPH0413003B2 (en) | ||
JPH0326120B2 (en) | ||
JPH0346166B2 (en) | ||
JPS58122085A (en) | Dehydrating method | |
JPS63256112A (en) | Electroosmotic dehydrator | |
JPH0356107A (en) | Electroosmotic dehydrator | |
JPH07112199A (en) | Dehydrator | |
JPH02115012A (en) | Sludge dehydration apparatus | |
JPH02119906A (en) | Electroosmotic dehydrator | |
JPS63256113A (en) | Electroosmotic dehydrator | |
JPH04126507A (en) | Sludge dehydrator | |
JP2011050844A (en) | Electro-osmotic dewatering method and apparatus | |
SE9500732L (en) | Procedure for the treatment of liquids | |
JPS6345604B2 (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |