JPH0442047A - Controlling method for moisture of dehydrated sludge - Google Patents
Controlling method for moisture of dehydrated sludgeInfo
- Publication number
- JPH0442047A JPH0442047A JP2149454A JP14945490A JPH0442047A JP H0442047 A JPH0442047 A JP H0442047A JP 2149454 A JP2149454 A JP 2149454A JP 14945490 A JP14945490 A JP 14945490A JP H0442047 A JPH0442047 A JP H0442047A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- dehydrated
- dehydrator
- dehydrated sludge
- moisture content
- 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
- 239000010802 sludge Substances 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims description 13
- 239000000126 substance Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000003814 drug Substances 0.000 abstract 2
- 239000000701 coagulant Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 4
- 239000013527 degreasing agent Substances 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は脱水汚泥の水分制御法に関し、さらに詳しくは
脱水汚泥の含水率を簡単な操作で連続的に一定に制御す
ることができる脱水汚泥の水分制御法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for controlling the moisture content of dehydrated sludge, and more specifically to a dehydrated sludge that can continuously control the moisture content of dehydrated sludge to a constant level with simple operations. Concerning moisture control methods.
従来、汚泥を濃縮、脱水して得られる脱水汚泥の水分測
定には、遠紫外線を利用した自動水分計などが用いられ
ている。しかしながら、この計測器は、サンプリングし
た汚泥を乾燥させて重量乾燥法で測定するものであり、
応答時間が長く、またサンプリングが必要であるため連
続的測定ができず、汚泥性状が急変した場合に追従でき
ないという問題があった。Conventionally, automatic moisture meters using far ultraviolet light have been used to measure the moisture content of dehydrated sludge obtained by concentrating and dewatering sludge. However, this measuring instrument uses the gravimetric drying method to dry the sampled sludge, and
Since the response time is long and sampling is required, continuous measurement is not possible, and there are problems in that it is not possible to follow sudden changes in sludge properties.
［発明が解決しようとする課題〕
本発明の目的は、前記した従来技術の問題を解決し、脱
水汚泥の水分量を連続かつ高精度に測定し、脱水汚泥の
含水率を一定に制御することができる脱水汚泥の水分制
御法を提供することにある。[Problems to be Solved by the Invention] The purpose of the present invention is to solve the problems of the prior art described above, to measure the water content of dehydrated sludge continuously and with high precision, and to control the water content of dehydrated sludge to a constant level. The purpose of this invention is to provide a method for controlling moisture content in dehydrated sludge.
本発明者は、先に出願した回転電極（特願平２９８３７
６号）を脱水汚泥の水分制御に通用することにより、上
記目的を達成できるとを見出し、本発明に到達した。The present inventor has previously applied for a rotating electrode (Japanese Patent Application No. 29837
We have discovered that the above object can be achieved by applying No. 6) to moisture control of dehydrated sludge, and have arrived at the present invention.
本発明は、汚泥タンクに貯溜された汚泥を薬剤混合槽に
導入して薬剤を注入、混合した後、脱水機により脱水し
て脱水汚泥を製造するに際し、該脱水汚泥中に、少なく
も１対の陰極および陽極が１−以下の間隔で平行に回転
端子に設けられた回転電極を設置し、該回転電極に一定
電圧を印加して電解電流を測定し、この測定値が一定範
囲となるように、前記脱水機の回転数、薬剤混合槽への
汚泥供給量または薬剤注入量を調節して脱水汚泥の含水
率を一定に制御することを特徴とする脱水汚泥の水分制
御法に関する。The present invention provides a method for producing dehydrated sludge by introducing sludge stored in a sludge tank into a chemical mixing tank, injecting and mixing chemicals, and then dewatering the sludge using a dehydrator. Install a rotating electrode in which the cathode and anode are parallel to each other at a spacing of 1- or less on a rotating terminal, apply a constant voltage to the rotating electrode, measure the electrolytic current, and keep this measured value within a certain range. The present invention relates to a method for controlling water content in dehydrated sludge, which comprises controlling the water content of the dehydrated sludge to a constant level by adjusting the rotational speed of the dehydrator, the amount of sludge supplied to the chemical mixing tank, or the amount of chemicals injected.
本発明に用いられる回転電極は、少なくとも１対の陰極
および陽極がＩＩＩＩＩｌ以下、好ましくは０．７５ｍ
ｍ〜０．１皿、より好ましくは０．５ ｍｍ〜０．３
ｆｆ１１１程度の間隔で平行に回転端子に設けられたも
のである。陰極と陽極を１肛以下の間隔で平行に回転端
子に設けることにより、試料中に固定極を設置すること
なく、また拡散槽が得られやすい試料に制約されること
なく、試料中の水分量に比例した安定した電解電流を発
生させることができるため、二の電流値から試料中の水
分量を算出することができる。またこのような回転電極
を用いることにより、電極表面への汚泥の付着を防止す
ることができるため、連続した電流測定が可能である。In the rotating electrode used in the present invention, at least one pair of a cathode and an anode has a length of 3 m or less, preferably 0.75 m
m ~ 0.1 dish, more preferably 0.5 mm ~ 0.3
The rotary terminals are provided in parallel at intervals of about ff111. By arranging the cathode and anode parallel to each other on the rotating terminal with an interval of less than one hole, the water content in the sample can be easily determined without installing a fixed electrode in the sample or being restricted to samples where a diffusion tank can be easily obtained. Since a stable electrolytic current proportional to can be generated, the water content in the sample can be calculated from the second current value. Further, by using such a rotating electrode, it is possible to prevent sludge from adhering to the electrode surface, so continuous current measurement is possible.
なお、電解電流値から水分量を算出する際には、測定精
度を向上させるために温度補正をすることが好ましい。Note that when calculating the water content from the electrolytic current value, it is preferable to perform temperature correction in order to improve measurement accuracy.
第４図は、本発明に用いられる一例の回転電極の斜視図
である。この回転電極６は、１ａＩｌ以下の間隔で平行
に設けられた１対の陰極１２および陽極１３と、該陰極
１２および陽極１３を固定し、かつこれらの先端部のみ
を露出させ、他の構成部分から絶縁する絶縁部１６と、
上記陰極１２および陽極１３をそれぞれ電源および計測
部に接続する集電ブラシ１４・および給電リング１５と
からなる。FIG. 4 is a perspective view of an example of a rotating electrode used in the present invention. This rotating electrode 6 has a pair of cathodes 12 and anodes 13 that are arranged in parallel with an interval of 1aIl or less, the cathodes 12 and anodes 13 are fixed, and only their tips are exposed, leaving the other components an insulating part 16 insulating from the
It consists of a current collecting brush 14 and a current feeding ring 15 that connect the cathode 12 and anode 13 to a power source and a measuring section, respectively.
陰極および陽極を構成する物質としては白金等の貴金属
が用いられ、陰極には銅、ＳＵＳなどを用いることもで
きる。陰極１２および陽極１３の露出位置は回転電極６
の底部に設けられているが、側部に設けてもよく、また
くし型状の電極としてもよい。絶縁部１６には、エポキ
シ樹脂、塩化ビニル樹脂、フェノール樹脂等の樹脂類や
セラミックスなどが用いられる。電極の長さは、測定精
度の点から短い方が好ましく、２０〜Ｉｏｎ以下とする
ことが好ましく、より好ましくは５ＩｎＩ１１程度であ
る。A noble metal such as platinum is used as the material constituting the cathode and the anode, and copper, SUS, etc. can also be used for the cathode. The exposed position of the cathode 12 and anode 13 is the rotating electrode 6
Although the electrodes are provided at the bottom, they may also be provided at the sides, or may be comb-shaped electrodes. For the insulating portion 16, resins such as epoxy resin, vinyl chloride resin, and phenol resin, ceramics, and the like are used. The length of the electrode is preferably shorter from the viewpoint of measurement accuracy, preferably 20 to 1000 ion, more preferably about 5InI11.
本発明においては、汚泥の性状変化（水分量変化）によ
り電解電流が変化することを利用したものであり、該電
解電流値を上記回転電極で直接かつ連続的に測定し、汚
泥の性状を瞬時に把握することができるため、この性状
の変化に応じて薬剤混合槽への汚泥供給量、薬剤注入量
または脱水機の回転数を調節することにより、脱水汚泥
の含水率を一定にコントロールすることができる。The present invention utilizes the fact that the electrolytic current changes due to changes in the properties of sludge (changes in water content), and the electrolytic current value is directly and continuously measured using the rotating electrode, and the properties of the sludge can be instantaneously measured. Therefore, the water content of dehydrated sludge can be controlled at a constant level by adjusting the amount of sludge supplied to the chemical mixing tank, the amount of chemical injection, or the rotation speed of the dehydrator according to changes in this property. I can do it.
以下、本発明を図面により詳しく説明する。Hereinafter, the present invention will be explained in detail with reference to the drawings.
第１図は、本発明の一実施例を示す脱水汚泥の製造装置
の工程図である。この装置は、汚泥９を貯溜する汚泥タ
ンク１と、該汚泥タンク１がら供給された汚泥９に薬剤
を注入して攪拌機８で混合する薬剤混合槽２と、該薬剤
混合槽２で混合された混合液を脱水する脱水機３と、該
脱脂機３で脱水された脱水汚泥１０を搬送するベルトコ
ンベア４と、該脱水汚泥１０中に設置され、一定電圧で
の電解電流を連続的に測定する回転電極５と、該回転電
極５での測定値が一定範囲となるように上記脱水機３の
回転数を制御する演算器６とからなる。FIG. 1 is a process diagram of a dewatered sludge manufacturing apparatus showing one embodiment of the present invention. This device consists of a sludge tank 1 that stores sludge 9, a chemical mixing tank 2 that injects chemicals into the sludge 9 supplied from the sludge tank 1, and mixes the chemicals with an agitator 8; A dehydrator 3 that dehydrates the mixed liquid, a belt conveyor 4 that conveys the dehydrated sludge 10 dehydrated by the degreaser 3, and a belt conveyor 4 that is installed in the dehydrated sludge 10 and continuously measures the electrolytic current at a constant voltage. It consists of a rotating electrode 5 and a computing unit 6 that controls the rotational speed of the dehydrator 3 so that the values measured by the rotating electrode 5 fall within a certain range.
このような構成において、汚泥タンク１に貯溜された汚
泥９は、ポンプ７により薬剤混合槽２に導入され、一定
量の薬剤（高分子凝集剤、無機凝集剤等）が注入されて
攪拌機８により混合された後、脱水機３に導入され、脱
水されて脱水汚泥１０となり、ベルトコンベア４で搬送
される。一方、脱水汚泥１０中に設置された回転電極５
に一定電圧が印加されて脱水汚泥の電解電流が測定され
て演算機６に入力され、ここで測定値が一定範囲となる
ように上記脱水機３の回転数が算出されて脱脂機３に伝
達され、脱水汚泥の含水率が一定となるようにコントロ
ールされる。In such a configuration, the sludge 9 stored in the sludge tank 1 is introduced into the chemical mixing tank 2 by the pump 7, a certain amount of chemicals (polymer flocculant, inorganic flocculant, etc.) is injected, and the sludge is mixed by the agitator 8. After being mixed, the sludge is introduced into a dehydrator 3 and dehydrated to become dehydrated sludge 10, which is conveyed by a belt conveyor 4. On the other hand, the rotating electrode 5 installed in the dehydrated sludge 10
A constant voltage is applied to the dehydrated sludge, and the electrolytic current of the dehydrated sludge is measured and inputted to the computer 6, where the rotation speed of the dehydrator 3 is calculated so that the measured value falls within a certain range and is transmitted to the degreaser 3. The water content of dehydrated sludge is controlled to be constant.
第２図は、本発明の他の実施例を示す脱水汚泥の製造装
置の工程図である。第２図で第１図と異なる点は、脱水
機３０回転数の制御の代わりに、薬剤供給調節弁１１を
設け、演算器６からの信号に応じて薬剤供給量を調節し
て脱水汚泥の含水率を一定にコントロールするようにし
たことである。FIG. 2 is a process diagram of a dewatered sludge manufacturing apparatus showing another embodiment of the present invention. The difference between FIG. 2 and FIG. 1 is that a chemical supply control valve 11 is provided instead of controlling the rotation speed of the dehydrator 30, and the amount of chemical supply is adjusted according to the signal from the calculator 6 to control the dewatered sludge. The aim is to control the moisture content at a constant level.
第３図は、本発明のさらに他の実施例を示す脱水汚泥の
製造装置の工程図である。第３図で第１図と異なる点は
、脱脂機３の回転数の制御の代わりに、ポンプ７により
薬剤混合槽２に供給する汚泥の供給量を調節して脱水汚
泥の含水率を一定にコントロールするようにしたことで
ある。FIG. 3 is a process diagram of a dewatered sludge manufacturing apparatus showing still another embodiment of the present invention. The difference between FIG. 3 and FIG. 1 is that instead of controlling the rotation speed of the degreaser 3, the amount of sludge supplied to the chemical mixing tank 2 is adjusted by the pump 7 to keep the water content of the dehydrated sludge constant. This is to control the situation.
第１図、第２図および第３図に示す装置においては、脱
水汚泥をサンプリングする必要がな（、脱水汚泥の性状
を連続的かつ瞬時に把握し、該汚′泥性状に応じた運転
条件を設定し、脱水汚泥の含水率を一定にコントロール
することができる。With the equipment shown in Figures 1, 2, and 3, there is no need to sample the dehydrated sludge (the properties of the dehydrated sludge can be grasped continuously and instantaneously, and the operating conditions can be set according to the sludge properties). can be set to control the moisture content of dehydrated sludge to a constant level.
本発明の脱水汚泥の水分制御法によれば、陰極と陽極が
１ｓａｉ以下の間隔で平行に回転端子に設けられた回転
電極を用い、汚泥中の電解電流値を高精度で直接かつ連
続的に測定し、該電流値が一定範囲となるように運電条
件を設定することができるため、汚泥の性状が２、激に
変化した場合でも、脱水汚泥の含水率を容易に一定に制
御することができる。According to the moisture control method for dehydrated sludge of the present invention, the electrolytic current value in sludge can be directly and continuously measured with high precision by using a rotating electrode in which a cathode and an anode are installed in a rotating terminal in parallel with an interval of 1 sai or less. Since the current value can be measured and the running conditions can be set so that the current value is within a certain range, the moisture content of dehydrated sludge can be easily controlled to a constant level even if the properties of the sludge change drastically. I can do it.
第１図は、本発明の一実施例を示す脱水汚泥の製造装置
の工程図、第２図は、本発明の他の実施例を示す脱水汚
泥の製造装置の工程図、第３図は、さらに他の実施例を
示す脱水汚泥の製造装置の工程図、第４図は、本発明に
用いられる一例の回転電極の斜視図である。
１・・・汚泥タンク、２・・・薬剤混合槽、３・・・脱
水機、４・・・ベルトコンベア、訃・・回転電極、６・
・・演算器、７・・・ポンプ、訃・・攪拌機、９・・・
汚泥、１ｏ・・・脱水汚泥、１１・・・薬剤供給調節弁
、１２・・・陰極、１３・・・陽極、１４・・・給電ブ
ラシ、１５・・・集電リンク、１６・・・絶縁部。
第
図
駆動部
龜
１２：陰極
１３：陽極FIG. 1 is a process diagram of a dewatered sludge manufacturing apparatus showing one embodiment of the present invention, FIG. 2 is a process diagram of a dewatered sludge manufacturing apparatus showing another embodiment of the present invention, and FIG. FIG. 4, which is a process diagram of a dewatered sludge manufacturing apparatus showing still another embodiment, is a perspective view of an example of a rotating electrode used in the present invention. 1... Sludge tank, 2... Chemical mixing tank, 3... Dehydrator, 4... Belt conveyor, Death... Rotating electrode, 6...
...Arithmetic unit, 7...Pump, ...Agitator, 9...
Sludge, 1o... Dehydrated sludge, 11... Chemical supply control valve, 12... Cathode, 13... Anode, 14... Power supply brush, 15... Current collection link, 16... Insulation Department. Diagram: Drive part 12: Cathode 13: Anode
Claims (1)
して薬剤を注入、混合した後、脱水機により脱水して脱
水汚泥を製造するに際し、該脱水汚泥中に、少なくも１
対の陰極および陽極が１ｍｍ以下の間隔で平行に回転端
子に設けられた回転電極を設置し、該回転電極に一定電
圧を印加して電解電流を測定し、この測定値が一定範囲
となるように、前記脱水機の回転数、薬剤混合槽への汚
泥供給量または薬剤注入量を調節して脱水汚泥の含水率
を一定に制御することを特徴とする脱水汚泥の水分制御
法。(1) When sludge stored in a sludge tank is introduced into a chemical mixing tank, chemicals are injected and mixed, and then dehydrated using a dehydrator to produce dehydrated sludge, at least one
A rotating electrode in which a pair of cathode and anode are parallel to each other with an interval of 1 mm or less is installed on a rotating terminal, and a constant voltage is applied to the rotating electrode to measure the electrolytic current, so that the measured value is within a certain range. A method for controlling water content in dehydrated sludge, characterized in that the water content of the dehydrated sludge is controlled to be constant by adjusting the rotational speed of the dehydrator, the amount of sludge supplied to the chemical mixing tank, or the amount of chemical injection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2149454A JP2854388B2 (en) | 1990-06-07 | 1990-06-07 | Water control method for dewatered sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2149454A JP2854388B2 (en) | 1990-06-07 | 1990-06-07 | Water control method for dewatered sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0442047A true JPH0442047A (en) | 1992-02-12 |
| JP2854388B2 JP2854388B2 (en) | 1999-02-03 |
Family
ID=15475479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2149454A Expired - Fee Related JP2854388B2 (en) | 1990-06-07 | 1990-06-07 | Water control method for dewatered sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2854388B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002035791A (en) * | 2000-07-24 | 2002-02-05 | Mitsui Eng & Shipbuild Co Ltd | Sludge monitor system, sludge control system, water treatment system, and sludge treatment system |
| JP2003181498A (en) * | 2001-12-20 | 2003-07-02 | Nishihara Environment Technology Inc | Dehydration apparatus |
| JP2005201753A (en) * | 2004-01-15 | 2005-07-28 | Kett Electric Laboratory | Moisture detecting unit and moisture measuring apparatus |
| JP2009535630A (en) * | 2006-05-01 | 2009-10-01 | エフ ホフマン−ラ ロッシュ アクチェン ゲゼルシャフト | Sample fluid test apparatus and method for analyzing sample fluid |
| JP2013208609A (en) * | 2012-03-02 | 2013-10-10 | Mitsui Zosen Environment Engineering Corp | Sludge treatment system, and sludge treatment method |
| JP2020118378A (en) * | 2019-01-24 | 2020-08-06 | 栗田工業株式会社 | ecosystem |
-
1990
- 1990-06-07 JP JP2149454A patent/JP2854388B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002035791A (en) * | 2000-07-24 | 2002-02-05 | Mitsui Eng & Shipbuild Co Ltd | Sludge monitor system, sludge control system, water treatment system, and sludge treatment system |
| JP2003181498A (en) * | 2001-12-20 | 2003-07-02 | Nishihara Environment Technology Inc | Dehydration apparatus |
| JP2005201753A (en) * | 2004-01-15 | 2005-07-28 | Kett Electric Laboratory | Moisture detecting unit and moisture measuring apparatus |
| JP2009535630A (en) * | 2006-05-01 | 2009-10-01 | エフ ホフマン−ラ ロッシュ アクチェン ゲゼルシャフト | Sample fluid test apparatus and method for analyzing sample fluid |
| US8685227B2 (en) | 2006-05-01 | 2014-04-01 | Roche Diagnostics Operations, Inc. | Sample fluid testing device and method for analyzing a sample fluid |
| JP2013208609A (en) * | 2012-03-02 | 2013-10-10 | Mitsui Zosen Environment Engineering Corp | Sludge treatment system, and sludge treatment method |
| JP2015120161A (en) * | 2012-03-02 | 2015-07-02 | 三井造船環境エンジニアリング株式会社 | Sludge treatment system and sludge treatment method |
| JP2020118378A (en) * | 2019-01-24 | 2020-08-06 | 栗田工業株式会社 | ecosystem |
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| JP2854388B2 (en) | 1999-02-03 |
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