JP3204888B2 - Method and apparatus for dehydrating liquid-containing solids - Google Patents
Method and apparatus for dehydrating liquid-containing solidsInfo
- Publication number
- JP3204888B2 JP3204888B2 JP30183395A JP30183395A JP3204888B2 JP 3204888 B2 JP3204888 B2 JP 3204888B2 JP 30183395 A JP30183395 A JP 30183395A JP 30183395 A JP30183395 A JP 30183395A JP 3204888 B2 JP3204888 B2 JP 3204888B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- containing solid
- amount
- ignition loss
- polymer flocculant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、下水汚泥などの含
液固形物を効率よく脱水する脱水方法および脱水装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dewatering method and a dewatering apparatus for efficiently dewatering liquid-containing solids such as sewage sludge.
【０００２】[0002]
【従来の技術】一般に、下水汚泥などの含液固形物は、
複雑な構造をもつ有機物および無機物の集合体であり、
適当な予備処理を行うことなく濾過や遠心分離などの操
作により脱水することは難しい。このため、高分子凝集
剤を添加して凝集フロックを形成させるなど、含液固形
物の脱水特性を改善した後に、ベルトプレス、フィルタ
ープレス、遠心脱水機などの脱水装置において脱水して
いる。2. Description of the Related Art In general, liquid-containing solids such as sewage sludge are
An aggregate of organic and inorganic substances with a complex structure,
It is difficult to dehydrate by an operation such as filtration or centrifugation without performing appropriate pretreatment. For this reason, after improving the dehydration characteristics of the liquid-containing solid matter by, for example, forming a flocculated floc by adding a polymer flocculant, dehydration is performed by a dehydration apparatus such as a belt press, a filter press, and a centrifugal dehydrator.
【０００３】[0003]
【発明が解決しようとする課題】上記したように高分子
凝集剤を添加する際には、含液固形物中の固形物量に比
例した添加量としているのが現状であるが、高分子凝集
剤は主として固形物中の有機物と反応するものであるの
に、固形物中の有機物の割合は含液固形物中の固形物割
合が高いほど低くなる傾向にある。したがって、含液固
形物中の固形物量に比例するように高分子凝集剤の添加
量を制御すると過剰添加となり、脱水ケーキ含水率やＳ
Ｓ回収率の低下を招くだけでなく、過剰分の高分子凝集
剤が残留して脱水濾液配管へのＳＳ付着を招くという問
題がある。As described above, when adding a polymer flocculant as described above, at present, the amount of the polymer flocculant is proportional to the solid content in the liquid-containing solid. Although mainly reacts with the organic matter in the solid, the proportion of the organic matter in the solid tends to decrease as the proportion of the solid in the liquid-containing solid increases. Therefore, when the addition amount of the polymer flocculant is controlled so as to be proportional to the solid content in the liquid-containing solid material, the polymer coagulant becomes excessively added, and the water content of the dehydrated cake and S
In addition to the decrease in the S recovery rate, there is a problem that an excess amount of the polymer flocculant remains and causes SS to adhere to the dehydrated filtrate pipe.
【０００４】本発明は上記問題を解決するもので、含液
固形物中の固形物を適当量の高分子凝集剤により好適に
凝集させ、脱水ケーキ含水率やＳＳ回収率の低下、およ
び残留した高分子凝集剤に起因する脱水濾液配管へのＳ
Ｓ付着を防止できるようにすることを目的とするもので
ある。[0004] The present invention solves the above-mentioned problems. The solids in the liquid-containing solids are suitably agglomerated with an appropriate amount of a polymer coagulant to reduce the water content of the dewatered cake and the SS recovery rate, and to reduce the amount of residual solids. S to the dewatered filtrate pipe caused by the polymer flocculant
The purpose is to prevent S adhesion.
【０００５】[0005]
【課題を解決するための手段】上記問題を解決するため
に、本発明の含液固形物の脱水方法は、含液固形物に高
分子凝集剤を添加し、固形物が凝集した含液固形物を脱
水機で脱水するに際し、脱水機の前段において、適宜含
液固形物の一部を採取してその強熱減量を測定し、測定
した強熱減量値に基づいて脱水しようとする含液固形物
中の有機物量を算出し、算出した有機物量に応じた適当
量の高分子凝集剤を添加するようにしたものである。In order to solve the above-mentioned problems, a method for dehydrating a liquid-containing solid according to the present invention comprises adding a polymer coagulant to the liquid-containing solid, and adding the polymer coagulant to the liquid-containing solid. When dehydrating the product with a dehydrator, at the previous stage of the dehydrator, appropriately collect a part of the liquid-containing solid matter, measure its loss on ignition, and perform the dehydration based on the measured loss on ignition value The amount of the organic substance in the solid is calculated, and an appropriate amount of the polymer flocculant according to the calculated amount of the organic substance is added.
【０００６】また本発明の含液固形物の脱水装置は、含
液固形物に高分子凝集剤を添加する高分子凝集剤添加手
段と、高分子凝集剤により凝集した含液固形物を導入し
て脱水する脱水機と、高分子凝集剤添加手段より前段に
配置され適宜含液固形物の一部を採取してその強熱減量
を測定する強熱減量測定手段と、強熱減量測定手段と高
分子凝集剤添加手段とに接続した制御手段とを有し、制
御手段によって、前記強熱減量測定手段により測定され
た含液固形物の強熱減量データを受けて、強熱減量デー
タに基づき脱水しようとする含液固形物中の有機物量を
算出し、算出した有機物量に応じて含液固形物中の有機
物を凝集させるに適当な高分子凝集剤量を算出し、算出
した適当量の高分子凝集剤を含液固形物に添加するよう
に高分子凝集剤添加手段を制御するように構成したもの
である。Further, the dehydrating apparatus for a liquid-containing solid according to the present invention comprises a polymer flocculant adding means for adding a polymer flocculant to the liquid-containing solid, and a liquid-containing solid agglomerated by the polymer flocculant. A dehydrator for dehydrating, and an ignition loss measuring means, which is disposed in front of the polymer flocculant addition means and appropriately collects a part of the liquid-containing solid to measure the ignition loss thereof, and an ignition loss measurement means Control means connected to the polymer flocculant addition means, wherein the control means receives the ignition loss data of the liquid-containing solid measured by the ignition loss measurement means, and based on the ignition loss data Calculate the amount of organic matter in the liquid-containing solid to be dehydrated, calculate the amount of the polymer flocculant appropriate for aggregating the organic matter in the liquid-containing solid according to the calculated amount of the organic matter, and calculate the appropriate amount of the calculated amount. Add a polymer flocculant so that the polymer flocculant is added to the solid containing liquid. Those configured to control the unit.
【０００７】上記した脱水方法および装置によれば、含
液固形物がバッチ投入される場合には投入時、連続投入
される場合には適当間隔でというように適宜、含液固形
物の一部が採取されてその強熱減量が測定される。そし
て、脱水しようとする含液固形物中の有機物量が算出さ
れ、その有機物量に応じた適当量の高分子凝集剤が添加
されるので、含液固形物が好適な凝集状態とされるとと
もに、従来のような高分子凝集剤の過剰添加が低減され
る。[0007] According to the above-mentioned dehydration method and apparatus, a part of the liquid-containing solid matter is appropriately determined, for example, when the liquid-containing solid matter is batch-injected, or at an appropriate interval when the liquid-containing solid matter is continuously charged. And the loss on ignition is measured. Then, the amount of the organic substance in the liquid-containing solid to be dehydrated is calculated, and an appropriate amount of the polymer coagulant according to the amount of the organic substance is added, so that the liquid-containing solid is brought into a suitable aggregation state. In addition, the conventional excessive addition of the polymer flocculant is reduced.
【０００８】[0008]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づき説明する。図１は、含液固形物に高分子凝集剤
を添加し、固形物が凝集した含液固形物を脱水機で脱水
するフローを示し、含液固形物供給管１は脱水機２に含
液固形物を供給するものであり、凝集剤供給管３は含液
固形物供給管１の管路途中において含液固形物に高分子
凝集剤を注入するものである。含液固形物供給管１およ
び凝集剤供給管３はそれぞれ含液固形物供給ポンプ４お
よび凝集剤供給ポンプ５を介装している。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a flow in which a polymer coagulant is added to a liquid-containing solid, and the liquid-containing solid in which the solid is aggregated is dehydrated by a dehydrator. The coagulant supply pipe 3 is for injecting a polymer coagulant into the liquid-containing solid in the middle of the liquid-containing solid supply pipe 1. The liquid-containing solid supply pipe 1 and the flocculant supply pipe 3 are provided with a liquid-containing solid supply pump 4 and a flocculant supply pump 5, respectively.
【０００９】含液固形物供給管１における凝集剤供給管
３の開口位置より上流には、含液固形物の強熱減量を測
定する強熱減量測定装置６が設けられており、強熱減量
測定装置６と凝集剤供給ポンプ５はそれぞれ信号ライン
７と制御ライン８とにより制御装置９に接続されてい
る。An ignition loss measuring device 6 for measuring the ignition loss of the liquid-containing solid is provided upstream of the opening of the coagulant supply pipe 3 in the liquid-containing solid supply pipe 1. The measuring device 6 and the flocculant supply pump 5 are connected to a control device 9 by a signal line 7 and a control line 8, respectively.
【００１０】制御装置９は、強熱減量測定装置６により
測定された含液固形物の強熱減量データを信号ライン７
を通じて受けて、強熱減量データに基づき含液固形物中
の有機物量を算出し、算出した有機物量に基づき含液固
形物中の有機物を凝集させるに適当な高分子凝集剤量を
算出し、算出した適当量の高分子凝集剤を含液固形物に
添加するように、制御ライン８を通じて凝集剤供給ポン
プ５の回転数を制御するように構成されている。脱水機
２には、脱水された脱水ケーキを排出するケーキ排出装
置１０と、脱水濾液を排出する排水管１１が設けられて
いる。The control device 9 transmits the data on the loss on ignition of the liquid-containing solid matter measured by the ignition loss measuring device 6 to a signal line 7.
Received through, calculate the amount of organic matter in the liquid-containing solid based on the ignition loss data, calculate the amount of a polymer flocculant suitable for aggregating the organic matter in the liquid-containing solid based on the calculated amount of organic, The control unit 8 is configured to control the rotation speed of the flocculant supply pump 5 so that the calculated appropriate amount of the polymer flocculant is added to the liquid-containing solid matter. The dehydrator 2 is provided with a cake discharging device 10 for discharging the dehydrated dehydrated cake and a drain pipe 11 for discharging the dehydrated filtrate.
【００１１】上記したようなフローにおいて、含液固形
物供給ポンプ４および凝集剤供給ポンプ５を駆動する
と、含液固形物は含液固形物供給管１を通じて脱水機２
に向けて送られ、管路途中において凝集剤供給管３によ
り高分子凝集剤が添加され、それにより固形物が凝集し
た含液固形物が脱水機２に導入されて脱水される。脱水
機２における脱水濾液は排水管１１より排出され、脱水
ケーキはケーキ排出装置１０により排出される。In the above-described flow, when the liquid-containing solid supply pump 4 and the flocculant supply pump 5 are driven, the liquid-containing solid is passed through the liquid-containing solid supply pipe 1 to the dehydrator 2.
And a polymer flocculant is added through the flocculant supply pipe 3 in the middle of the pipe, whereby the liquid-containing solid matter in which the solid matter is flocculated is introduced into the dehydrator 2 to be dehydrated. The dehydrated filtrate in the dehydrator 2 is discharged from a drain pipe 11, and the dehydrated cake is discharged by a cake discharge device 10.
【００１２】このとき、凝集剤供給管３の開口位置より
上流に設けられた強熱減量測定装置６において適宜、含
液固形物の一部が採取されてその強熱減量の測定が行わ
れ、測定された強熱減量データが信号ライン７を通じて
制御装置９に送られる。At this time, in the ignition loss measuring device 6 provided upstream of the opening position of the coagulant supply pipe 3, a part of the liquid-containing solid is appropriately collected and the ignition loss is measured. The measured ignition loss data is sent to the controller 9 via the signal line 7.
【００１３】そして、制御装置９において、強熱減量デ
ータに基づき脱水しようとする含液固形物中の有機物量
が算出され、算出された有機物量に基づいて、含液固形
物中の有機物を凝集させるに適当な高分子凝集剤量が算
出される。Then, the controller 9 calculates the amount of organic matter in the liquid-containing solid to be dehydrated based on the ignition loss data, and aggregates the organic matter in the liquid-containing solid based on the calculated amount of organic matter. An appropriate amount of the polymer flocculant to be used is calculated.
【００１４】そして、制御装置９により制御ライン８を
通じて、算出された適当量の高分子凝集剤が含液固形物
に添加されるように、凝集剤供給ポンプ５の回転数が制
御される。Then, the controller 9 controls the number of rotations of the flocculant supply pump 5 so that the calculated appropriate amount of the polymer flocculant is added to the liquid-containing solid through the control line 8.
【００１５】このようにして、主として有機物と反応す
る高分子凝集剤が含液固形物に添加される際に、脱水し
ようとする含液固形物中の有機物量に応じた適当量添加
されるので、含液固形物は常に最適な凝集状態とされな
がら、従来のような高分子凝集剤の過剰添加が低減され
ることになり、脱水ケーキ含水率やＳＳ回収率の低下が
防止され、残留高分子凝集剤に起因する脱水濾液配管へ
のＳＳ付着も減少する。In this way, when the polymer flocculant which mainly reacts with the organic substance is added to the liquid-containing solid, an appropriate amount is added according to the amount of the organic substance in the liquid-containing solid to be dehydrated. In addition, while the liquid-containing solids are always kept in the optimum flocculation state, the excessive addition of the polymer flocculant as in the prior art is reduced, and the water content of the dehydrated cake and the SS recovery rate are prevented from lowering. SS adhesion to the dehydrated filtrate pipe due to the molecular coagulant is also reduced.
【００１６】[0016]
【発明の効果】以上のように本発明によれば、主として
有機物と反応する高分子凝集剤を添加するに際し、その
添加量を、含液固形物中の有機物量に応じた適当量とす
ることができるので、含液固形物を最適な凝集状態とし
ながら、高分子凝集剤の使用量を節約できる。また、脱
水ケーキ含水率やＳＳ回収率の向上を図れるとともに、
残留高分子凝集剤に起因する脱水濾液配管へのＳＳ付着
および脱水濾液配管の閉塞を防止できる。As described above, according to the present invention, when a polymer flocculant that reacts mainly with an organic substance is added, the amount added is adjusted to an appropriate amount according to the amount of the organic substance in the liquid-containing solid. Therefore, the amount of the polymer flocculant used can be reduced while the liquid-containing solid is kept in the optimum flocculation state. In addition, while improving the water content of the dewatered cake and the SS recovery rate,
Adhesion of SS to the dehydrated filtrate pipe and clogging of the dehydrated filtrate pipe caused by the residual polymer flocculant can be prevented.
【図１】本発明の含液固形物の脱水方法および脱水装置
の一実施形態を説明するフローチャートである。FIG. 1 is a flowchart illustrating one embodiment of a dehydration method and a dehydration apparatus for a liquid-containing solid according to the present invention.
１ 含液固形物供給管 ２ 脱水機 ３ 凝集剤供給管 ４ 含液固形物供給ポンプ ５ 凝集剤供給ポンプ ６ 強熱減量測定装置 ９ 制御装置 DESCRIPTION OF SYMBOLS 1 Liquid-containing solid supply pipe 2 Dehydrator 3 Coagulant supply pipe 4 Liquid-containing solid supply pump 5 Coagulant supply pump 6 Ignition loss measuring device 9 Control device
フロントページの続き (56)参考文献 特開 平６−312200（ＪＰ，Ａ) 特開 平５−285500（ＪＰ，Ａ) 特公 平６−88040（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) C02F 11/14 B01D 21/01,21/30 Continuation of the front page (56) References JP-A-6-312200 (JP, A) JP-A-5-285500 (JP, A) JP-B-6-88040 (JP, B2) (58) Fields surveyed (Int .Cl. 7 , DB name) C02F 11/14 B01D 21 / 01,21 / 30
Claims (2)
形物が凝集した含液固形物を脱水機で脱水するに際し、
脱水機の前段において、適宜含液固形物の一部を採取し
てその強熱減量を測定し、測定した強熱減量値に基づい
て脱水しようとする含液固形物中の有機物量を算出し、
算出した有機物量に応じた適当量の高分子凝集剤を添加
することを特徴とする含液固形物の脱水方法。1. A polymer coagulant is added to a liquid-containing solid, and the liquid-containing solid in which the solid is aggregated is dehydrated by a dehydrator.
In the preceding stage of the dehydrator, a part of the liquid-containing solid matter is appropriately collected and its ignition loss is measured, and the amount of organic matter in the liquid-containing solid matter to be dewatered is calculated based on the measured ignition loss value. ,
A method for dehydrating a liquid-containing solid matter, comprising adding an appropriate amount of a polymer flocculant according to the calculated amount of organic matter.
分子凝集剤添加手段と、高分子凝集剤により凝集した含
液固形物を導入して脱水する脱水機と、高分子凝集剤添
加手段より前段に配置され適宜含液固形物の一部を採取
してその強熱減量を測定する強熱減量測定手段と、強熱
減量測定手段と高分子凝集剤添加手段とに接続した制御
手段とを有し、制御手段によって、前記強熱減量測定手
段により測定された含液固形物の強熱減量データを受け
て、強熱減量データに基づき脱水しようとする含液固形
物中の有機物量を算出し、算出した有機物量に応じて含
液固形物中の有機物を凝集させるに適当な高分子凝集剤
量を算出し、算出した適当量の高分子凝集剤を含液固形
物に添加するように高分子凝集剤添加手段を制御するよ
うに構成したことを特徴とする含液固形物の脱水装置。2. A polymer coagulant adding means for adding a polymer coagulant to a liquid-containing solid, a dehydrator for introducing and dehydrating the liquid-containing solid coagulated by the polymer coagulant, and a polymer coagulant A control unit connected to the ignition loss measuring means, which is disposed before the addition means and appropriately collects a part of the liquid-containing solid matter and measures the ignition loss thereof, and the ignition loss measurement means and the polymer flocculant addition means Means, the control means receives the ignition loss data of the liquid-containing solid measured by the ignition loss measuring means, and receives the organic matter in the liquid-containing solid to be dehydrated based on the ignition loss data. Calculate the amount, calculate the amount of polymer flocculant appropriate for aggregating the organic matter in the liquid-containing solid according to the calculated amount of organic matter, and add the calculated appropriate amount of polymer flocculant to the liquid-containing solid That the means for adding the polymer flocculant is controlled so that Characteristic dewatering device for liquid-containing solids.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30183395A JP3204888B2 (en) | 1995-11-21 | 1995-11-21 | Method and apparatus for dehydrating liquid-containing solids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30183395A JP3204888B2 (en) | 1995-11-21 | 1995-11-21 | Method and apparatus for dehydrating liquid-containing solids |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09141299A JPH09141299A (en) | 1997-06-03 |
| JP3204888B2 true JP3204888B2 (en) | 2001-09-04 |
Family
ID=17901716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30183395A Expired - Fee Related JP3204888B2 (en) | 1995-11-21 | 1995-11-21 | Method and apparatus for dehydrating liquid-containing solids |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3204888B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002273495A (en) * | 2001-03-22 | 2002-09-24 | Tokyoto Gesuido Service Kk | Equipment and method for dehydrating sludge |
| CN106698888B (en) * | 2016-12-29 | 2018-08-21 | 华中科技大学 | A kind of chemical amendment dosage optimization method for deeply dehydrating sludge |
| CN107459237B (en) * | 2017-09-18 | 2018-09-25 | 华中科技大学 | Based on the sludge composite conditioner of iron containing sludge pyrolysis residue and its preparation and application |
-
1995
- 1995-11-21 JP JP30183395A patent/JP3204888B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09141299A (en) | 1997-06-03 |
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