JPS6054753A - Turbidity controlling device of centrifugal dehydrator - Google Patents
Turbidity controlling device of centrifugal dehydratorInfo
- Publication number
- JPS6054753A JPS6054753A JP58162782A JP16278283A JPS6054753A JP S6054753 A JPS6054753 A JP S6054753A JP 58162782 A JP58162782 A JP 58162782A JP 16278283 A JP16278283 A JP 16278283A JP S6054753 A JPS6054753 A JP S6054753A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- turbidity
- chemical
- amount
- supply pump
- 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
- Centrifugal Separators (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、下水処理場等で汚泥を濃縮脱水する遠心脱水
機に係シ、特に、汚泥供給量を薬注量を最適にする遠心
脱水機の濁度側−に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a centrifugal dehydrator for concentrating and dewatering sludge in a sewage treatment plant, etc., and particularly to a centrifugal dehydrator that optimizes the amount of sludge supplied and the amount of chemical injection. Regarding the turbidity side of
従来の汚泥濃縮脱水システムは第１図に示す如き構成を
有している。すなわち、！濃縮汚泥を適宜かく拌してい
るサービスタンクｌには、汚泥供給ポンプ２を介して遠
心脱水機４が接続されている。A conventional sludge concentration and dewatering system has a configuration as shown in FIG. In other words! A centrifugal dehydrator 4 is connected via a sludge supply pump 2 to a service tank 1 in which thickened sludge is appropriately stirred.
この遠心脱水機４に入る汚泥の量が汚泥供給縦針３によ
って計測される。この汚泥供給ポンプ２には、汚泥供給
ポンプ回転数指令装置８が朕続されており、この汚泥供
給ポンプ回転数指令装置８にはＰＩＤ調節計１０が接続
されている。このＰＩＤ調節計１０には、汚泥供給置針
３からの計測値が入力されるように構成されている。ま
た、遠心脱水機４には、薬品供給ポンプ６を介して薬品
溶解タンク７よシ薬品が注入されるように構成されてい
る。この薬品の注入量は、薬注置針５によって計測され
る。この薬注置針５にはＰＩＤ調節計１１が接続されて
おシ、この薬注置針５の計測値によって薬品供給ポンプ
６を薬品供給ポンプ回転数指令装置９によってＰＩＤｉ
ｎｌＪ却を行っている。The amount of sludge entering the centrifugal dehydrator 4 is measured by the sludge supply vertical needle 3. A sludge supply pump rotation speed command device 8 is connected to the sludge supply pump 2, and a PID controller 10 is connected to the sludge supply pump rotation speed command device 8. This PID controller 10 is configured so that the measured value from the sludge supply needle 3 is input. Further, the centrifugal dehydrator 4 is configured such that chemicals are injected into the chemical dissolution tank 7 via a chemical supply pump 6. The amount of this medicine to be injected is measured by the medicine injection needle 5. A PID controller 11 is connected to the medicine injection needle 5, and a medicine supply pump 6 is controlled by a medicine supply pump rotation speed command device 9 to control the medicine supply pump 6 according to the measured value of the medicine injection needle 5.
nlJ has been rejected.
このように構成される汚泥脱水システムは、次の如く動
作する。すなわち、濃縮された汚泥は一旦サービスタン
ク１に貯留され、汚泥供給ボンダ２によシ引き抜かれ遠
心脱水機４へ送られる。遠心脱水機４への汚泥供給量は
汚泥供給置針３にて測定される。汚泥供給量はオペレー
タが設定した汚泥供給量設定値となる様ＰＩＤＡ節計１
０にて汚泥供給ポンプ２の回転数を汚泥供給ポンプ回転
数指令装置崖８を介して制御する。汚泥を効率的に脱水
するために遠心脱水機４に薬品を供給する。The sludge dewatering system configured as described above operates as follows. That is, the concentrated sludge is temporarily stored in the service tank 1, drawn out by the sludge supply bonder 2, and sent to the centrifugal dehydrator 4. The amount of sludge supplied to the centrifugal dehydrator 4 is measured by the sludge supply needle 3. PIDA Saving 1 so that the sludge supply amount is the sludge supply amount setting value set by the operator.
0, the rotation speed of the sludge supply pump 2 is controlled via the sludge supply pump rotation speed command device cliff 8. Chemicals are supplied to the centrifugal dehydrator 4 to efficiently dewater the sludge.
この薬品は薬品溶解夕／り７にて作られる。薬品は薬品
溶解タンク７から薬品供給ポンプ６により引き抜かれ遠
心脱水機４へ供給される。遠心脱水（幾４への薬注量は
薬注置針５−にて測定される。薬注量はオペレータが設
定しだ薬注量設定値となる様ＰＩＤ調節計１１にて薬品
供給ポンプ６０回転数を薬品供給ポンプ回転数指令装置
ｔ９を介し制御する。This chemical is made in a chemical dissolution step/removal step 7. The chemicals are drawn out from the chemical dissolution tank 7 by the chemical supply pump 6 and supplied to the centrifugal dehydrator 4. Centrifugal dehydration (The amount of medicine injected into the tube 4 is measured with the medicine injection needle 5-.The amount of medicine injected is set by the operator.The medicine supply pump is rotated 60 times using the PID controller 11 so that the medicine injection amount setting value is set by the operator. The number of rotations is controlled via a drug supply pump rotation speed command device t9.
上記の如〈従来はオペレータが連続的にケーキの含水率
をチェック出来ないため、サンプリング的にチェックし
、汚泥供給量や薬注量の目標値を修正していた。このた
め下記の様な欠点があった。As mentioned above, in the past, operators were unable to continuously check the moisture content of the cake, so they checked it on a sampling basis and corrected the target values for the sludge supply amount and chemical injection amount. This resulted in the following drawbacks.
（１）オペレータが欲しているケーキ含水率にする事が
困難である。(1) It is difficult to achieve the cake moisture content desired by the operator.
（２）最適薬品供給が汚泥供給に対して不明であるため
不必要な薬品を供給していた。このため経済性が悪かっ
た。(2) Unnecessary chemicals were supplied because the optimal chemical supply for sludge supply was unknown. This made it uneconomical.
本発明の目的は、最適含水率の汚泥ケーキをｒ尋ること
のできる遠心脱水機の濁度制御装置を提供することにあ
る。An object of the present invention is to provide a turbidity control device for a centrifugal dehydrator that can produce a sludge cake with an optimal water content.
本発明はケーキ含水率と濁度が汚泥供給量及び薬注率（
汚泥供給量に対する薬品注入量の比率）、遠心脱水機差
速の関薮であることを実験によって確認し、濁度を中間
変数とし汚泥供給量と薬注率。In the present invention, the cake moisture content and turbidity are determined by the sludge supply amount and chemical dosing rate (
It was confirmed through experiments that the ratio of chemical injection amount to sludge supply amount) and centrifugal dehydrator differential speed are related, and turbidity was used as an intermediate variable to calculate sludge supply amount and chemical injection rate.
遠心脱水機差速を変化させることによシ最適含水率の汚
泥ケーキを寿ようというものである。By changing the differential speed of the centrifugal dehydrator, it is possible to produce a sludge cake with an optimal moisture content.
以下、本発明の実施例について説明する。 Examples of the present invention will be described below.
第２図には、本発明の一実施例が示されている。FIG. 2 shows an embodiment of the invention.
図において、第１図図示従来例と同一の符号の付しであ
るものは同一の部品・同一の機能を有するものである。In the drawings, the same reference numerals as in the conventional example shown in FIG. 1 indicate the same parts and the same functions.
本実施例が、第１図図示従来例と異なる点は遠心脱水機
４内の濁度を検出する濁度計１３を設け、との濁度計１
３からの濁度と、汚泥供給置針３によって検出される汚
泥供給量とを取込み、ＰＩＤ調節計１０．１１にそれぞ
れ、汚泥供給量設定値、薬注量設定値を出力すると共に
、遠心脱水機駆動用電動機１５を制御する脱水機差速指
令装置１４に差速値を出力する汚泥供給量。This embodiment is different from the conventional example shown in FIG.
3 and the sludge supply amount detected by the sludge supply needle 3, and output the sludge supply amount set value and chemical injection amount set value to the PID controllers 10 and 11, respectively, and the centrifugal dehydrator. The amount of sludge supplied that outputs a differential speed value to the dehydrator differential speed command device 14 that controls the drive electric motor 15.
・襄注蔽演算装置１２を設けた点である。・This is the point that a calculation device 12 is provided.
このように構成されるものであるから、まず、濃縮され
た汚泥は一旦サービスタンク１に貯留さ４し
れ、汚泥供給ポンプ２よシ引き抜かれ遠心脱水機４へ送
られる。遠心脱水機４への汚泥供給量は汚泥供給置針３
にて測定される。汚泥供給量は汚泥供給量・薬注量演算
装置１２が演算した汚泥供給量設定値となる様ＰＩＤ調
節計１０にて汚泥供給ポンプ２の回転数を汚泥供給ポン
プ回転数指令装置８を介して制御する。汚泥の脱水効果
は汚水内の汚泥の粒の大きさと遠心力によシ決る。この
ため汚泥を効率的に脱水するだめに遠心脱水機４に薬品
（例えばポリマ、ＦｅＣ４３）を供給し汚σＩ：の粒を
大きくする必要がある。この薬品は薬品溶解タンク７に
て作られる。薬品は薬品溶解タンク７から薬品供給ポン
プ６によシ引き抜かれ遠心、脱水機４へ供給される。遠
心脱水機４への薬注量は薬注置針５にて測定される。薬
注量は汚泥供給量・薬注量演算装置１２が演算した薬注
率に汚泥供給置針３からの入力を掛は合せた薬注量設定
値となる様ＰＩＤｍ節計１１にて薬品供給ポンプ６の回
転数を薬品供給ポンプ回転数指令装置９を介し制御する
。Since it is constructed in this way, first, the concentrated sludge is temporarily stored in the service tank 1 , and then drawn out through the sludge supply pump 2 and sent to the centrifugal dehydrator 4 . The amount of sludge supplied to the centrifugal dehydrator 4 is determined by the sludge supply needle 3.
Measured at The rotation speed of the sludge supply pump 2 is controlled by the PID controller 10 via the sludge supply pump rotation speed command device 8 so that the sludge supply amount becomes the sludge supply amount set value calculated by the sludge supply amount/chemical injection amount calculation device 12. Control. The effectiveness of sludge dewatering is determined by the size of sludge particles in sewage and centrifugal force. Therefore, in order to efficiently dewater the sludge, it is necessary to supply chemicals (for example, polymer, FeC43) to the centrifugal dehydrator 4 to enlarge the particles of the sludge σI:. This chemical is produced in a chemical dissolution tank 7. The chemicals are drawn out from the medicine dissolving tank 7 by the medicine supply pump 6 and supplied to the centrifugal dehydrator 4. The amount of medicine injected into the centrifugal dehydrator 4 is measured with a medicine injection needle 5. The chemical supply pump is controlled by the PIDm meter 11 so that the chemical injection amount is the chemical injection rate set value calculated by the sludge supply amount/chemical injection amount calculation device 12 multiplied by the input from the sludge supply needle 3. 6 is controlled via a drug supply pump rotation speed command device 9.
第３図には、汚泥洪給批・薬注量演算装置１２内の薬注
率を決定する方法の７０−チャートが示されている。す
なわち、脱水機制御を開始時現在の汚泥供給量薬注率、
濁度を前回値として記憶する。その後薬注率を下げ濁度
が設定濁度となるまで汚泥供給量を制御するＰＩＤ調節
對ｉｏにて制御する。もし汚泥供給量が汚泥共１治の上
下限値となった場合設定濁度と計測した濁度の偏差、前
回の薬注率の増加、減少の方向を考え薬注率を変化させ
る。ｆ’ｌえは、前回薬注率を下げた時設定濁度と計測
した濁度の偏差が少なくなった時今回も薬注率を下げれ
ば良く、逆に偏差が大きくなった時今回の薬注率は増加
すれば良い。この様な処理を行っていて薬注率も上下限
値になシ、又汚泥供給量も上下限直になった場合は遠心
脱水機４の差速を濁度の偏差を基にして、汚泥供給量・
薬注量演算装置１２にてＰＩＤ演算を行ない脱水機差速
指令装置１・４を介し遠心脱水機、小動用醒動機１５の
回転数を制御する。遠心脱水機４の差速か変った事によ
シ第４図から第５図の如く薬注率、汚泥供給量に対する
等濁度曲線（等しい濁度を結んだ曲線）が変化する。第
４図、第５図の０点は同一汚泥供給量、同一薬注率での
濁度の違いを示している。FIG. 3 shows a 70-chart of a method for determining the chemical injection rate in the sludge flood control/chemical injection amount calculation device 12. In other words, the current sludge supply amount and chemical injection rate at the time of starting dewatering machine control,
Store the turbidity as the previous value. Thereafter, the chemical injection rate is lowered and the sludge supply amount is controlled by the PID control unit io, which controls the sludge supply amount until the turbidity reaches the set turbidity. If the sludge supply amount reaches the upper and lower limits for both sludge, change the chemical injection rate by considering the deviation between the set turbidity and the measured turbidity, and the direction of increase or decrease in the previous chemical injection rate. f'le is that when the deviation between the set turbidity and the measured turbidity decreases when the chemical injection rate was lowered last time, it is sufficient to lower the chemical injection rate this time as well, and conversely, when the deviation becomes large, it is necessary to reduce the chemical injection rate this time. The order rate should just increase. If such treatment is being carried out and the chemical injection rate is not at the upper or lower limit, and if the sludge supply amount is also at the upper or lower limit, the differential speed of the centrifugal dehydrator 4 should be adjusted based on the turbidity deviation. Supply amount/
The chemical dosing amount calculation device 12 performs a PID calculation, and the rotational speed of the centrifugal dehydrator and the small-movement stirrer 15 is controlled via the dehydrator differential speed command devices 1 and 4. As the differential speed of the centrifugal dehydrator 4 changes, the equal turbidity curve (curve connecting equal turbidities) with respect to the chemical injection rate and the sludge supply amount changes as shown in FIGS. 4 and 5. The zero point in FIGS. 4 and 5 indicates the difference in turbidity at the same sludge supply amount and the same chemical injection rate.
濁度設定値と計測した濁度が等しくなった時汚泥供給量
が上下限値になってい女い限９薬注率を変更して汚泥供
給量の変化を見る。例えば、濁度設定；直と計測した濁
度が等しい状態で前回薬注率を下げた時汚泥供給量が増
えたならば、今回も薬注率を下げれば、さらに汚泥供給
量が増加すると考えられる。逆に減少したならば今回の
薬注率を増加すれば、汚泥供給量が増加すると考えられ
る。When the turbidity setting value and the measured turbidity become equal, the sludge supply amount reaches the upper and lower limits.9 Change the chemical injection rate and observe the change in the sludge supply amount. For example, if the sludge supply amount increased when the chemical injection rate was lowered last time with the same turbidity setting and measured turbidity, it is assumed that if the chemical injection rate is lowered again this time, the sludge supply amount will further increase. It will be done. On the contrary, if it decreases, increasing the current chemical injection rate will increase the sludge supply amount.
この様に汚泥供給量の増加を、汚泥供給量が極大値か又
は上下限値となるまで続ける。又、薬注率を変化させて
濁度設定値と計測した濁度が異なった場合、汚泥供給量
を制御する。ＰＩＤ調節計１０にて汚泥量を制御し、濁
度を濁度設定値とする。この様に、汚泥供給量が極大か
上下限直となシ、濁度が濁度設定値となった時点で安定
な運転状態となシ、濁度設定値の修正を待つ事になる。The increase in the sludge supply amount is continued in this manner until the sludge supply amount reaches the maximum value or the upper and lower limits. Furthermore, if the turbidity setting value and the measured turbidity differ by changing the chemical injection rate, the sludge supply amount is controlled. The amount of sludge is controlled by the PID controller 10, and the turbidity is set as the turbidity setting value. In this way, when the sludge supply amount is at its maximum or at the upper and lower limits, when the turbidity reaches the turbidity set value, the operating state is stable and the turbidity set value must be corrected.
次に、第６図〜第９図を用いて脱水機４での濁度とケー
キ含水率について示す。Next, the turbidity and cake moisture content in the dehydrator 4 will be shown using FIGS. 6 to 9.
第６図は薬注率を変数（例えば変数値２ｏｏｏｐ）とし
だ時の濁度とケーキ含水率を示したものである。いま、
薬注率を徐々に増加していくと濁度、ケーキ含水率とも
下がってくるが薬注率がある範囲を越えると濁度は上が
るがケーキ含水率はほとんど変化がない。このことは、
ケーキ含水率の方は薬品をいくら投入してもある一定性
を超えると薬品の効果が飽和してしまうことを示してお
シ、一方、濁度はめる一定量を超えると薬品の効果が飽
オロしてしまい飽和量を超えた薬品が逆に脱離液に溶は
込むことを示している。FIG. 6 shows the turbidity and cake moisture content when the chemical injection rate is set as a variable (for example, a variable value of 2ooop). now,
As the chemical dosing rate is gradually increased, both the turbidity and the cake moisture content decrease, but when the chemical dosing rate exceeds a certain range, the turbidity increases but the cake moisture content hardly changes. This means that
Cake moisture content indicates that no matter how much chemicals are added, the effect of the chemicals will be saturated if it exceeds a certain level, while turbidity indicates that the effect of the chemicals will become saturated if it exceeds a certain amount. This shows that the chemical exceeds the saturation amount and dissolves into the desorbed liquid.
第７図は汚泥供給量を変数とした時の濁度とケーキぎ水
率を示したものである。いま、汚泥供給量を徐々に増加
させるとｔ＠度及びケーキ含水率ともに増加する。この
ことは、薬品の効果が汚泥供給量増加によって薄れて来
て脱離液に汚泥分が溶は込むことを示している。Figure 7 shows the turbidity and cake drainage rate when the sludge supply amount is used as a variable. Now, if the sludge supply amount is gradually increased, both the t@ degree and the cake moisture content will increase. This indicates that the effect of the chemicals is weakening as the amount of sludge supplied increases, and the sludge content dissolves into the desorbed liquid.
第８図は遠心脱水機４の内側と外側の回転数の差（遠心
脱水機差速）を変数とした時のど加変とケーキ含水率を
示したものである。この図から回転差速を変数とし九時
濁度とケーキ含水率は反対の傾向があるとわかる。これ
は回転差速が大きくなると小さい時よシも早くケーキが
出てくるためケーキ含水率が高くなるが脱離液は汚泥分
をケーキが水分とともに外に持ち出す分だけ低くなるだ
めである。FIG. 8 shows the change in throat and the moisture content of the cake when the difference in rotational speed between the inside and outside of the centrifugal dehydrator 4 (centrifugal dehydrator differential speed) is used as a variable. From this figure, it can be seen that when the differential speed of rotation is used as a variable, the 9-hour turbidity and cake moisture content have opposite trends. This is because when the rotation differential speed increases, the cake comes out earlier than when it is small, so the moisture content of the cake increases, but the desorbed liquid decreases by the amount of sludge carried out with the moisture by the cake.
第９図は遠心脱水機４の差速を一定とした時第６図、第
７図を考慮して作った等濁度曲線である。FIG. 9 is an isoturbidity curve created in consideration of FIGS. 6 and 7 when the differential speed of the centrifugal dehydrator 4 is constant.
矢印入方向は濁度が高い領域になる事を示し、矢印Ｂ方
向は濁度が低い領域になる事を示している。The direction of the arrow indicates an area with high turbidity, and the direction of arrow B indicates an area with low turbidity.
本実施例においては、マイクロコンピュータ等の小型の
計算様をコントローラーとして使用することを前提とし
ている。このため、第９図に示す如き等濁曲線をモデル
としてファイル化することなく、プラントに対するカッ
トアンドトライ方式を用いている。このため、
（１）回転差速の変更、汚泥濃度、汚泥特性が変化して
も変化した時の状態で最適な薬注率や最大汚泥量をめて
運転点を移動していく。このため外乱に対して強いシス
テムとなる。In this embodiment, it is assumed that a small computer such as a microcomputer is used as a controller. For this reason, a cut-and-try method is used for the plant without creating a file using the isoturbidity curve as shown in FIG. 9 as a model. For this reason, (1) Even if the rotation differential speed is changed, the sludge concentration, or the sludge characteristics change, the optimum chemical injection rate and maximum sludge amount are determined under the changed conditions and the operating point is moved. This makes the system resistant to external disturbances.
（２）小型の計算機でも処理が可能となシ安価となる。(2) Processing can be performed even on a small computer, resulting in low cost.
という長所を有している。一方、
（１） プラントの状態を一度変化させるため、債極的
に外乱を与える事になる。It has the advantage of On the other hand, (1) Since the state of the plant is changed once, disturbances will be applied to the bond pole.
（２） プラントの動作時間が遅い場合最適薬注率、最
大汚泥量となるまでに時間がかかる。モデルがあればそ
の内で襞適値を１回で見つける事が出来早く目的とする
点に行きつく。(2) If the plant operating time is slow, it takes time to reach the optimum chemical injection rate and maximum sludge volume. If you have a model, you can find the appropriate fold value in one go and quickly reach the desired point.
という短所をも有している。It also has the disadvantage of
したがって、本実ｍ例によれば、容易にオペレータの欲
しているケーキ含水率にする事ができる。Therefore, according to this example, it is possible to easily achieve the cake moisture content desired by the operator.
また、本実施例によれば、薬品供給量が最適とすること
ができるため、汚泥供給量が最大となシ経済性を良くす
ることができる。Furthermore, according to this embodiment, the amount of chemicals supplied can be optimized, so the amount of sludge supplied can be maximized, and the economical efficiency can be improved.
以上説明したように５本発明によれば、最適含水率の汚
泥ケーキを得ることができる。As explained above, according to the present invention, a sludge cake with an optimum moisture content can be obtained.
第１図は従来の汚泥濃縮脱水システムの構成図、第２図
は本発明の実施例を示す図、第３図は汚泥供給量・薬注
量演算装置内部の処理フローチャート、第４図は遠心脱
水機の差速を変える前の濁度と汚泥供給量と薬注率の特
性図、第５図は遠心脱水機の差速を変えた後の濁度と汚
泥供給量と薬注率の特性図、第６図は遠心脱水機内の薬
注率を変数としたときの濁度とケーキ含水率の関係を示
す図、第７図は遠心脱水機内の汚泥供給量を変数とたと
きの濁度とケーキ含水率の関係を示す図、第９図は遠心
脱水機内の汚泥供給量と薬注率を変数としたときの等濁
度曲線を示す図である。
１・・・サービスタンク、２・・・汚泥供給ポンプ、３
・・・汚泥供給量針、４・・・遠心脱水機、５・・・薬
注量針、６・・・薬品供給ポンプ、７・・・薬品溶解タ
ンク、８・・・汚泥供給ポンプ回転数指令装置、９・・
・薬品供給ポンプ回転数指令装置、１０・・・ＰＩＤ調
節計、１１・・・１’ＩＤ調節計、１２・・・汚泥供給
景−薬注量演算装置、１３・・・濁度計、１４・・・脱
水機差速指令装置、工５・・・遠心脱水様駆動用電動機
。
代理人 弁理士 鵜沼辰之
第 ２ 図
功Ｊ掠玲責Fig. 1 is a configuration diagram of a conventional sludge concentration and dewatering system, Fig. 2 is a diagram showing an embodiment of the present invention, Fig. 3 is a processing flow chart inside the sludge supply amount/chemical injection amount calculation device, and Fig. 4 is a centrifugal Figure 5 shows the characteristics of turbidity, sludge supply amount, and chemical injection rate before changing the differential speed of the dehydrator, and Figure 5 shows the characteristics of turbidity, sludge supply amount, and chemical injection rate after changing the differential speed of the centrifugal dehydrator. Figure 6 shows the relationship between turbidity and cake moisture content when the chemical injection rate in the centrifugal dehydrator is used as a variable, and Figure 7 shows the turbidity when the sludge supply amount in the centrifugal dehydrator is used as a variable. FIG. 9 is a diagram showing the isoturbidity curve when the sludge supply amount and chemical injection rate in the centrifugal dehydrator are variables. 1...Service tank, 2...Sludge supply pump, 3
... Sludge supply amount needle, 4 ... Centrifugal dehydrator, 5 ... Chemical injection needle, 6 ... Chemical supply pump, 7 ... Chemical dissolution tank, 8 ... Sludge supply pump rotation speed Command device, 9...
- Chemical supply pump rotation speed command device, 10... PID controller, 11... 1'ID controller, 12... Sludge supply view-medicine injection amount calculation device, 13... Turbidity meter, 14 ... Dehydrator differential speed command device, Engineering 5 ... Centrifugal dehydration drive electric motor. Agent Patent Attorney Tatsuyuki Unuma No. 2 Zuko J Reisaku
Claims (1)
タンクから汚泥を引き出す汚泥供給ポンプと、前記汚泥
供給ポンプの吐出量を測定する汚泥供給縦針と、前記汚
泥供給ポンプによって汚泥の供給を受け該汚泥の脱水を
行う遠心脱水機と、汚泥を凝縮するための薬品を貯留す
る薬品溶解タンクと、該薬品溶解タンクから薬品を前記
遠心脱水機に供給する薬品供給ポンプと、該薬品供給ポ
ンプの吐出量を測定する薬注縦針と、汚泥供給量目標値
とするため汚泥供・給ポンプの回転数を制御するＰＩＤ
調節計と、前記汚泥供給ポンプの回転数を指令する回転
数指令装置と、薬品供給量目゛標値とするため前記薬品
供給ポンプの回転数を１が」御するＰＩＤ調節計と、前
記薬品供給ポンプの回転数を指令する回転数指令装置と
を有し下水処理場等において汚泥を濃縮脱水するものに
おいて、上記遠心脱水機よシ排出され、る脱離液濁度を
検出する濁度計と、汚泥供給１と脱離液濁度がら最大汚
泥供給量で最適の薬注率となる指令値を演算して上記各
ＰＩＤ調節計を制（至）する汚泥供給量・薬注量演算装
置とを設けたことを特徴とする遠心脱水機の濁度制置装
置。1. A service tank that temporarily stores sludge, a sludge supply pump that draws out sludge from the service tank, a sludge supply vertical needle that measures the discharge amount of the sludge supply pump, and a system that receives and receives sludge from the sludge supply pump. A centrifugal dehydrator for dewatering sludge, a chemical dissolving tank for storing chemicals for condensing sludge, a chemical supply pump for supplying chemicals from the chemical dissolving tank to the centrifugal dehydrator, and a discharge of the chemical supply pump. Vertical needle for chemical injection to measure the amount, and PID to control the rotation speed of the sludge supply pump to achieve the target value of sludge supply amount
a controller, a rotational speed command device that commands the rotational speed of the sludge supply pump, a PID controller that controls the rotational speed of the chemical supply pump in order to set the chemical supply amount target value, and the chemical. A turbidity meter that detects the turbidity of the desorbed liquid discharged from the centrifugal dewatering machine in a device that concentrates and dehydrates sludge in a sewage treatment plant, etc., and has a rotation speed control device that commands the rotation speed of a supply pump. and a sludge supply amount/chemical injection amount calculation device that controls each of the above PID controllers by calculating a command value that provides the optimum chemical injection rate at the maximum sludge supply amount based on the sludge supply 1 and the turbidity of the desorbed liquid. A turbidity control device for a centrifugal dehydrator, characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58162782A JPS6054753A (en) | 1983-09-05 | 1983-09-05 | Turbidity controlling device of centrifugal dehydrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58162782A JPS6054753A (en) | 1983-09-05 | 1983-09-05 | Turbidity controlling device of centrifugal dehydrator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6054753A true JPS6054753A (en) | 1985-03-29 |
| JPS6241791B2 JPS6241791B2 (en) | 1987-09-04 |
Family
ID=15761104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58162782A Granted JPS6054753A (en) | 1983-09-05 | 1983-09-05 | Turbidity controlling device of centrifugal dehydrator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6054753A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0663451A (en) * | 1992-08-17 | 1994-03-08 | Nishihara Environ Sanit Res Corp | Apparatus and method for measuring turbidity of separated solution of centrifugal dehydrator |
| JPH07997A (en) * | 1993-06-15 | 1995-01-06 | Tokyo Met Gov Gesuido Service Kk | Sludge treating device |
| JPH07232200A (en) * | 1994-02-24 | 1995-09-05 | Tokyo Met Gov Gesuido Service Kk | Treatment of sludge |
| JP2004167401A (en) * | 2002-11-20 | 2004-06-17 | Toshiba Corp | Waste water treatment equipment and waste water treatment method |
| JP2008249096A (en) * | 2007-03-30 | 2008-10-16 | Nok Corp | Sealing structure and gasket |
| US8337378B2 (en) | 2006-11-15 | 2012-12-25 | Gea Westfalia Separator Gmbh | Continuous self-cleaning centrifuge assembly having turbidity-sensing feature |
| JP2013000692A (en) * | 2011-06-20 | 2013-01-07 | Takuma Co Ltd | Sludge treatment system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5088687A (en) * | 1973-10-12 | 1975-07-16 | ||
| JPS5334359A (en) * | 1976-09-10 | 1978-03-30 | Kubota Ltd | Sludge dewatering process and device |
-
1983
- 1983-09-05 JP JP58162782A patent/JPS6054753A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5088687A (en) * | 1973-10-12 | 1975-07-16 | ||
| JPS5334359A (en) * | 1976-09-10 | 1978-03-30 | Kubota Ltd | Sludge dewatering process and device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0663451A (en) * | 1992-08-17 | 1994-03-08 | Nishihara Environ Sanit Res Corp | Apparatus and method for measuring turbidity of separated solution of centrifugal dehydrator |
| JP2785856B2 (en) * | 1992-08-17 | 1998-08-13 | 株式会社 西原環境衛生研究所 | Apparatus and method for measuring turbidity of separated liquid in centrifugal dehydrator |
| JPH07997A (en) * | 1993-06-15 | 1995-01-06 | Tokyo Met Gov Gesuido Service Kk | Sludge treating device |
| JPH07232200A (en) * | 1994-02-24 | 1995-09-05 | Tokyo Met Gov Gesuido Service Kk | Treatment of sludge |
| JP2004167401A (en) * | 2002-11-20 | 2004-06-17 | Toshiba Corp | Waste water treatment equipment and waste water treatment method |
| US8337378B2 (en) | 2006-11-15 | 2012-12-25 | Gea Westfalia Separator Gmbh | Continuous self-cleaning centrifuge assembly having turbidity-sensing feature |
| JP2008249096A (en) * | 2007-03-30 | 2008-10-16 | Nok Corp | Sealing structure and gasket |
| JP2013000692A (en) * | 2011-06-20 | 2013-01-07 | Takuma Co Ltd | Sludge treatment system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6241791B2 (en) | 1987-09-04 |
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