JPH09141299A - Dehydrating method of liquid-containing solid material and dehydrating device - Google Patents
Dehydrating method of liquid-containing solid material and dehydrating deviceInfo
- Publication number
- JPH09141299A JPH09141299A JP7301833A JP30183395A JPH09141299A JP H09141299 A JPH09141299 A JP H09141299A JP 7301833 A JP7301833 A JP 7301833A JP 30183395 A JP30183395 A JP 30183395A JP H09141299 A JPH09141299 A JP H09141299A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- containing solid
- ignition loss
- polymer flocculant
- amount
- 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 Of Suspended Particles By Flocculating Agents (AREA)
Abstract
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。TECHNICAL FIELD 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 Generally, liquid-containing solids such as sewage sludge are
It is an aggregate of organic matter and inorganic matter having a complicated structure,
It is difficult to dehydrate by an operation such as filtration or centrifugation without performing an appropriate pretreatment. For this reason, after dehydration characteristics of the liquid-containing solid are improved by adding a polymer flocculant to form coagulated flocs, dehydration is performed in a dehydrating apparatus such as a belt press, a filter press, 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 the polymer coagulant is added, the amount of the polymer coagulant added is proportional to the amount of solids in the liquid-containing solid. Mainly reacts with the organic matter in the solid matter, but the proportion of the organic matter in the solid matter tends to decrease as the proportion of the solid matter in the liquid-containing solid matter increases. Therefore, if the addition amount of the polymer flocculant is controlled so as to be proportional to the solid content in the liquid-containing solid, it becomes excessive addition, and the dehydrated cake water content and S
There is a problem that not only the S recovery rate is lowered, but also an excessive amount of the polymer flocculant remains and SS is attached 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。The present invention solves the above problems by suitably agglomerating the solid matter in a liquid-containing solid matter with an appropriate amount of a polymer flocculant to reduce the water content of the dehydrated cake and the SS recovery rate, and to remain. S to the dehydration filtrate piping due to the polymer flocculant
The purpose is to prevent S from adhering.
【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 problems, a method for dehydrating a liquid-containing solid according to the present invention is a liquid-containing solid obtained by adding a polymer flocculant to a liquid-containing solid to form an aggregate of the solid. When dehydrating the product with a dehydrator, in the previous stage of the dehydrator, a part of the liquid-containing solid is appropriately sampled to measure its ignition loss, and the liquid-containing liquid to be dehydrated based on the measured ignition loss value. The amount of organic matter in the solid matter is calculated, and an appropriate amount of polymer flocculant is added according to the calculated amount of organic matter.
【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 apparatus for dehydrating a liquid-containing solid of the present invention introduces a polymer coagulant adding means for adding a polymer coagulant to the liquid-containing solid and a liquid-containing solid aggregated by the polymer coagulant. A dehydrator for dehydration by means of, an ignition loss measuring means arranged before the polymer coagulant adding means and measuring a portion of the liquid-containing solid to measure its ignition loss, and an ignition loss measuring means. And a control means connected to the polymer flocculant addition means, the control means receives the ignition loss data of the liquid-containing solid measured by the ignition loss measuring 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 polymer flocculant suitable for aggregating the organic matter in the liquid-containing solid according to the calculated amount of organic matter, and calculate the appropriate amount of Add the polymer coagulant to the liquid-containing solid so that the polymer coagulant 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。According to the above-described dehydration method and apparatus, when the liquid-containing solids are batch-charged, a part of the liquid-containing solids is appropriately charged at the time of charging, and when continuously charged, at an appropriate interval. Is collected and its ignition loss is measured. Then, the amount of organic matter in the liquid-containing solid to be dehydrated is calculated, and a suitable amount of the polymer flocculant according to the amount of organic matter is added, so that the liquid-containing solid is in a suitable aggregation state. The excessive addition of the conventional 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 of adding a polymer flocculant to a liquid-containing solid material and dehydrating the liquid-containing solid material in which the solid materials are aggregated by a dehydrator. The solid material is supplied, and the flocculant supply pipe 3 injects the polymer flocculant into the liquid-containing solid material in the middle of the liquid-containing solid material supply pipe 1. The liquid-containing solids supply pipe 1 and the coagulant supply pipe 3 are provided with a liquid-containing solids supply pump 4 and a coagulant 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 position of the coagulant supply pipe 3 in the liquid-containing solid supply pipe 1, and the ignition loss is measured. The measuring device 6 and the flocculant supply pump 5 are connected to the 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 uses the signal line 7 to output the ignition loss data of the liquid-containing solid measured by the ignition loss measuring device 6.
Through, calculate the amount of organic matter in the liquid-containing solid based on the loss on ignition data, calculate the amount of polymer flocculant suitable for aggregating the organic matter in the liquid-containing solid based on the calculated amount of organic matter, The rotation speed of the coagulant supply pump 5 is controlled through the control line 8 so that the calculated appropriate amount of the polymer coagulant is added to the liquid-containing solid. 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 flow as described above, when the liquid-containing solids supply pump 4 and the flocculant supply pump 5 are driven, the liquid-containing solids pass through the liquid-containing solids supply pipe 1 and the dehydrator 2
The polymer-containing coagulant is added by the coagulant supply pipe 3 in the middle of the pipeline, and the liquid-containing solid matter in which the solid matter is agglomerated thereby is introduced into the dehydrator 2 and dehydrated. The dehydrated filtrate in the dehydrator 2 is discharged from the drain pipe 11, and the dehydrated cake is discharged from the cake discharging 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, a part of the liquid-containing solid is appropriately sampled in the ignition loss measuring device 6 provided upstream of the opening position of the coagulant supply pipe 3, and the ignition loss is measured. The measured ignition loss data is sent to the control device 9 through 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, in the controller 9, the amount of organic matter in the liquid-containing solid to be dehydrated is calculated based on the ignition loss data, and the organic matter in the liquid-containing solid is aggregated based on the calculated amount of organic matter. An appropriate amount of polymer flocculant 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 control device 9 controls the rotation speed of the coagulant supply pump 5 through the control line 8 so that the calculated appropriate amount of the polymer coagulant is added to the liquid-containing solid matter.
【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 reacts mainly with the organic substance is added to the liquid-containing solid substance, an appropriate amount is added according to the amount of the organic substance in the liquid-containing solid substance to be dehydrated. While the liquid-containing solids are always in the optimum aggregation state, the excessive addition of the polymer coagulant as in the conventional method is reduced, the decrease of the dehydrated cake water content and the SS recovery rate are prevented, and the residual high The adhesion of SS to the dehydration filtrate pipe due to the molecular flocculant 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 which reacts mainly with an organic substance is added, the addition amount thereof is set to an appropriate amount according to the amount of the organic substance in the liquid-containing solid. Therefore, it is possible to save the amount of the polymer flocculant used while keeping the liquid-containing solid material in an optimal flocculation state. In addition, while improving the moisture content of the dehydrated cake and SS recovery rate,
It is possible to prevent SS from adhering to the dehydration filtrate pipe and clogging of the dehydration filtrate pipe due to the residual polymer coagulant.
【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 flow chart illustrating an embodiment of a method and apparatus for dehydrating 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 1 Liquid-containing solids supply pipe 2 Dehydrator 3 Flocculant supply pipe 4 Liquid-containing solids supply pump 5 Flocculant supply pump 6 Ignition loss measuring device 9 Control device
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. When a polymer flocculant is added to a liquid-containing solid material and the liquid-containing solid material in which the solid material is aggregated is dehydrated by a dehydrator,
In the previous stage of the dehydrator, a part of the liquid-containing solid is appropriately collected and its ignition loss is measured, and the amount of organic matter in the liquid-containing solid to be dehydrated is calculated based on the measured ignition loss value. ,
A method for dehydrating a liquid-containing solid, 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 flocculant-adding means for adding a polymer flocculant to a liquid-containing solid, a dehydrator for introducing and dehydrating a liquid-containing solid aggregated by the polymer flocculant, and a polymer flocculant Ignition loss measuring means arranged in the preceding stage from the adding means to appropriately measure a part of the liquid-containing solid and measuring the ignition loss, and control connected to the ignition loss measuring means and the polymer flocculant adding means Means for receiving the ignition loss data of the liquid-containing solid measured by the ignition loss measuring means by the control means, 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 suitable 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 To control the polymer coagulant addition means to Characteristic liquid dehydration device.
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 true JPH09141299A (en) | 1997-06-03 |
| JP3204888B2 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) |
Cited By (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 |
| CN106698888A (en) * | 2016-12-29 | 2017-05-24 | 华中科技大学 | Method for optimizing added amount of chemical conditioner for deep dehydration of sludge |
| CN107459237A (en) * | 2017-09-18 | 2017-12-12 | 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
Cited By (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 |
| CN106698888A (en) * | 2016-12-29 | 2017-05-24 | 华中科技大学 | Method for optimizing added amount of chemical conditioner for deep dehydration of sludge |
| CN107459237A (en) * | 2017-09-18 | 2017-12-12 | 华中科技大学 | Based on the sludge composite conditioner of iron containing sludge pyrolysis residue and its preparation and application |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3204888B2 (en) | 2001-09-04 |
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