JPH0159020B2 - - Google Patents
Info
- Publication number
- JPH0159020B2 JPH0159020B2 JP59089490A JP8949084A JPH0159020B2 JP H0159020 B2 JPH0159020 B2 JP H0159020B2 JP 59089490 A JP59089490 A JP 59089490A JP 8949084 A JP8949084 A JP 8949084A JP H0159020 B2 JPH0159020 B2 JP H0159020B2
- Authority
- JP
- Japan
- Prior art keywords
- speed
- differential speed
- differential
- dehydrator
- motor
- 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
Links
- 239000010802 sludge Substances 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241001170751 Eragrostis curvula streak virus Species 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Centrifugal Separators (AREA)
- Treatment Of Sludge (AREA)
Description
【発明の詳細な説明】 〔発明の技術分野〕 本発明は遠心脱水機の制御装置に関する。[Detailed description of the invention] [Technical field of invention] The present invention relates to a control device for a centrifugal dehydrator.
従来、下水処理場から発生する汚泥処理方法と
して遠心脱水機による方法がある。脱水汚泥の排
出を容易とするために、遠心脱水機本体に差速機
構を設ける設備のフローシートを第１図に示す。
Conventionally, as a method for treating sludge generated from sewage treatment plants, there is a method using a centrifugal dehydrator. Fig. 1 shows a flow sheet of equipment in which a differential speed mechanism is provided in the main body of a centrifugal dehydrator in order to facilitate the discharge of dehydrated sludge.
脱水機本体１は中に内胴と呼ばれるスクリユー
機構２を有し、各々駆動モータ３、差速モータ４
により駆動されている。駆動モータ３は固定速度
であるが差速モータ４は渦電流継手５で速度を可
変とし泥を排出するに必要な差速をスクリユー機
構２に与えている。速度検出器６は渦電流継手５
のフイードバツクをとるために設けられている。
設備フローとしては、脱水機本体１に汚泥を供給
する汚泥供給ポンプ７、高分子凝集剤に代表され
る薬品を供給する薬品供給ポンプ８がある。 The dehydrator main body 1 has a screw mechanism 2 called an inner shell inside, and each has a drive motor 3 and a differential speed motor 4.
is driven by. The drive motor 3 has a fixed speed, but the speed of the differential speed motor 4 is variable using an eddy current coupling 5, and provides the screw mechanism 2 with the differential speed necessary for discharging mud. The speed detector 6 is an eddy current joint 5
It has been established to receive feedback from the public.
The equipment flow includes a sludge supply pump 7 that supplies sludge to the dehydrator main body 1, and a chemical supply pump 8 that supplies chemicals such as polymer flocculants.
脱水機本体１の差速は通常(1)式により計算され
る。 The differential speed of the dehydrator main body 1 is usually calculated using equation (1).
△Ｎ＝（N1−NEC×ri）×１／Ｒ……(1)
ここで△Ｎは差速、N1は脱水機本体の回転数、
NECは差速モータの渦電流継手出力回転数、riは
差速機構のピニオンプーリー減速比、Ｒはギヤボ
ツクス減速比である。 △N=(N 1 −N EC ×ri)×1/R……(1) Here, △N is the differential speed, N 1 is the rotation speed of the dehydrator body,
NEC is the eddy current joint output rotation speed of the differential speed motor, ri is the pinion pulley reduction ratio of the differential speed mechanism, and R is the gearbox reduction ratio.
差速演算部９は(1)式を有し予め設定される差速
値△Ｎを実現するに必要な渦電流継手出力回転数
NECを求め、この渦電流継手出力回転数NECを差
速制御部１０に目標値として与え、差速制御部１
０にてPI制御を行ない操作量を渦電流継手５に
与えている。 The differential speed calculation unit 9 has the formula (1) and calculates the eddy current joint output rotation speed necessary to realize the preset differential speed value △N.
N EC is determined, and this eddy current joint output rotation speed N EC is given to the differential speed control section 10 as a target value, and the differential speed control section 1
PI control is performed at 0, and the manipulated variable is given to the eddy current joint 5.
本制御装置に於ては種々の固定パラメータがあ
り、脱水機運転開始当初は良好な制御性を示す
が、数年間脱水機を使用するに従い固定パラメー
タであるピニオンプーリー減速比riは数値が変わ
つてくる事があり、又脱水機本体に入れる供給汚
泥の量又は濃度により速度一定であるべき駆動モ
ータ３の回転数も変わる事から差速△Ｎが制御目
標値と一致しないという問題が発生していた。 This control device has various fixed parameters, and it shows good controllability when the dehydrator starts operating, but as the dehydrator is used for several years, the value of the pinion pulley reduction ratio ri, which is a fixed parameter, changes. Furthermore, the rotational speed of the drive motor 3, which should be kept at a constant speed, changes depending on the amount or concentration of the supplied sludge fed into the dehydrator main body, causing the problem that the differential speed △N does not match the control target value. Ta.
本発明は上記問題点を解決するために駆動モー
タの回転数をとりこむ事と固定パラメータである
ピニオンプーリー減速比riを補正する装置を追加
することにより、脱水機の差速を常に目標値に一
致させ、制御性を維持する装置を提供することを
目的としている。
In order to solve the above problems, the present invention takes the rotation speed of the drive motor and adds a device that corrects the pinion pulley reduction ratio ri, which is a fixed parameter, so that the differential speed of the dehydrator always matches the target value. The purpose of this invention is to provide a device that maintains controllability.
固定パラメータであるピニオンプーリー減速比
riは頻繁に変更すべき値ではないが、差速制御部
の制御同期に対しＫ倍の時間を経過しても差速の
偏差が許容範囲に入らない時、更にタイマー等に
より、その偏差が残つているものである事を確認
した後、ピニオンプーリー減速比riは機械の経年
変化等により変わりうるものであるので、逆に他
の定数や実測値よりピニオンプーリー減速比riを
逆算し、新たに求まつたピニオンプーリー減速比
riNewで以降の制御をかけようとするものである。
Pinion pulley reduction ratio is a fixed parameter
ri is not a value that should be changed frequently, but if the deviation of the differential speed does not fall within the allowable range even after K times the time for the control synchronization of the differential speed controller, a timer etc. may be used to correct the deviation. After confirming that the pinion pulley reduction ratio ri is the one that remains, as the pinion pulley reduction ratio ri may change due to changes in the machine over time, etc., reversely calculate the pinion pulley reduction ratio ri from other constants and actual measurements, and replace it with a new one. Pinion pulley reduction ratio found for
This is to try to control the following with ri New .
即ち、本発明は差速機構を有する遠心脱水機に
於て、駆動モータと差速モータの回転数を測り差
速を演算する差速演算部と差速演算式のパラメー
タを差速の偏差が定量以上継続したことにより補
正するパラメータ補正部を有することを特徴とす
る脱水機の制御装置である。 That is, in a centrifugal dewatering machine having a differential speed mechanism, the present invention includes a differential speed calculation section that measures the rotational speed of the drive motor and the differential speed motor and calculates the differential speed, and a parameter of the differential speed calculation formula that is determined by the deviation of the differential speed. This is a control device for a dehydrator, characterized in that it has a parameter correction section that corrects when the amount of water continues to exceed a fixed amount.
次に本発明の実施例について説明する。第２図
は差速機構を備えた脱水機と、この脱水機に供給
された汚泥を遠心脱水するために脱水機本体１を
駆動する駆動モータ３と、脱水された汚泥を排出
するために脱水機の内胴１ａを駆動する差速モー
タ４と、差速モータ４の回転速度を調整するため
の渦電流継手５と、差速モータ４の回転速度を検
出する速度検出器６とからなる脱水機の制御装置
に於て、モータ３の回転速度を検出する速度検出
器１１と、速度検出器１１からの駆動速度１１ａ
によつて差速値を演算して予め設定する差速演算
部９Ａと、差速演算部９Ａからの設定値９ｂ及び
速度検出器６からの差速度信号６ａによつて渦電
流継手５に制御指令１０ａを出力する差速制御部
１０と、差速制御部１０からの差速信号１０ｂに
よつて差速演算部９Ａの差速値を補正するパラメ
ータ補正部１２とを具備してなる脱水機の制御装
置を示している。
Next, examples of the present invention will be described. Figure 2 shows a dehydrator equipped with a differential speed mechanism, a drive motor 3 that drives the dehydrator main body 1 to centrifugally dewater the sludge supplied to the dehydrator, and a dehydrator to discharge the dehydrated sludge. A dewatering system consisting of a differential speed motor 4 that drives the inner shell 1a of the machine, an eddy current joint 5 for adjusting the rotational speed of the differential speed motor 4, and a speed detector 6 that detects the rotational speed of the differential speed motor 4. In the machine control device, a speed detector 11 detects the rotational speed of the motor 3, and a drive speed 11a from the speed detector 11.
The eddy current joint 5 is controlled by a differential speed calculating section 9A that calculates and presets a differential speed value by a differential speed calculating section 9A, and a set value 9b from the differential speed calculating section 9A and a differential speed signal 6a from the speed detector 6. A dehydrator comprising a differential speed control section 10 that outputs a command 10a, and a parameter correction section 12 that corrects a differential speed value of a differential speed calculation section 9A based on a differential speed signal 10b from the differential speed control section 10. The control device is shown.
駆動モータ３の回転数は速度検出器１１により
測定され差速演算部９Ａに入力される。パラメー
タ補正部１２は差速制御部の制御偏差量よりピニ
オンプーリー減速比riの補正を行ない差速演算部
９Ａにフイードバツクさせる装置である。 The rotation speed of the drive motor 3 is measured by the speed detector 11 and inputted to the differential speed calculation section 9A. The parameter correction section 12 is a device that corrects the pinion pulley reduction ratio ri based on the control deviation amount of the differential speed control section and feeds it back to the differential speed calculation section 9A.
パラメータ補正部１２では第３図に示す手順で
論理判断を行なつている。差速の目標値NECSVと
測定値NECPVの偏差を検出する偏差演算部１３の
偏差ｅが許容範囲eL内であるかの判定をする判定
部１４の判定結果がNOの時、即ち偏差ｅが許容
範囲eLより大きい時には更に遅延をかけるタイマ
ー１５を動作させ、タイマー時間内に偏差が許容
値に入ればタイマー１５は再設定される。補正演
算部１６はタイマー１５によつて遅延後、駆動モ
ータ回転数N1と差速目標値△NSV、差速モータ回
転数NEC、及び定数Ｒよりピニオンプーリー減速
比riを逆算する。レジスタ１７は求まつた新しい
ピニオンプーリー減速比riNEWをピニオンプーリ
ー減速比riに置換し、得られたピニオンプーリー
減速比riを差速演算部９Ａに戻し、差速の制御性
を維持する。 The parameter correction section 12 performs logical judgment according to the procedure shown in FIG. When the determination result of the determination unit 14, which determines whether the deviation e of the deviation calculation unit 13 that detects the deviation between the target value N ECSV of the differential speed and the measured value N ECPV , is within the allowable range e L , that is, the deviation When e is larger than the permissible range e L , a timer 15 is activated to further delay the time, and if the deviation falls within the permissible value within the timer time, the timer 15 is reset. After a delay by the timer 15, the correction calculation unit 16 back-calculates the pinion pulley reduction ratio ri from the drive motor rotation speed N 1 , differential speed target value ΔN SV , differential speed motor rotation speed N EC , and constant R. The register 17 replaces the determined new pinion pulley reduction ratio ri NEW with the pinion pulley reduction ratio ri, returns the obtained pinion pulley reduction ratio ri to the differential speed calculating section 9A, and maintains the controllability of the differential speed.
以上説明したように、経年変化による脱水機特
性の外れを差速機構のパラメータに注目し補正す
ることにより、偏差なく適確な差速値で制御をか
けることが可能となり、制御性維持という効果が
得られる。 As explained above, by paying attention to the parameters of the differential speed mechanism and correcting deviations in the characteristics of the dehydrator due to aging, it becomes possible to perform control with an appropriate differential speed value without deviation, and the effect is to maintain controllability. is obtained.
本発明は脱水機本体の駆動モータの速度を実測
値でとり、差速を計算することにより差速そのも
のの経年によるずれを補正し、制御性を維持させ
ることができる。
In the present invention, the speed of the drive motor of the dehydrator main body is actually measured and the differential speed is calculated, thereby correcting the deviation of the differential speed itself due to aging and maintaining controllability.
第１図は従来の脱水機装置の構成図、第２図は
本発明の一実施例を示す脱水機装置の構成図、第
３図はパラメータ補正部のブロツク説明図であ
る。
１……脱水機、２……スクリユー機構、５……
渦電流継手、６……速度検出器、９……差速演算
部、１０……差速制御部、１２……パラメータ補
正部、１３……偏差演算部、１４……判定部、１
６……補正演算部。
FIG. 1 is a block diagram of a conventional dehydrator apparatus, FIG. 2 is a block diagram of a dehydrator apparatus showing an embodiment of the present invention, and FIG. 3 is a block diagram of a parameter correction section. 1... Dehydrator, 2... Screw mechanism, 5...
Eddy current joint, 6... Speed detector, 9... Differential speed calculation section, 10... Differential speed control section, 12... Parameter correction section, 13... Deviation calculation section, 14... Judgment section, 1
6...Correction calculation section.
Claims (1)
給された汚泥を遠心脱水するために脱水機本体を
駆動する駆動電動機と、脱水された汚泥を排出す
るために前記脱水機の内胴を駆動する差速電動機
と、この差速電動機の回転速度を調整するための
回転数調整装置と、前記差速電動機の回転速度を
検出する差速度検出器とからなる脱水機の制御装
置に於て、前記駆動電動機の回転速度を検出する
駆動速度検出器と、この駆動速度検出器からの駆
動速度によつて差速値を演算して予め設定する差
速演算部と、この差速演算部からの設定値及び前
記差速度検出器からの差速度信号によつて前記回
転数調整装置に制御指令を出力する差速制御部
と、この差速制御部からの差速信号によつて前記
差速演算部の差速値を補正するパラメータ補正部
とを具備してなる脱水機の制御装置。1 A dehydrator equipped with a differential speed mechanism, a drive motor that drives the dehydrator main body to centrifugally dehydrate the sludge supplied to the dehydrator, and an inner body of the dehydrator to discharge the dehydrated sludge. A control device for a dewatering machine includes a differential speed motor for driving a differential speed motor, a rotation speed adjusting device for adjusting the rotation speed of the differential speed motor, and a differential speed detector for detecting the rotation speed of the differential speed motor. a drive speed detector that detects the rotational speed of the drive motor; a differential speed calculation section that calculates and presets a differential speed value based on the drive speed from the drive speed detector; and the differential speed calculation section. a differential speed controller that outputs a control command to the rotational speed adjusting device based on a set value from the differential speed detector and a differential speed signal from the differential speed detector; A control device for a dehydrator, comprising a parameter correction section that corrects a differential speed value of a speed calculation section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59089490A JPS60235660A (en) | 1984-05-07 | 1984-05-07 | Controlling device for dehydrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59089490A JPS60235660A (en) | 1984-05-07 | 1984-05-07 | Controlling device for dehydrator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60235660A JPS60235660A (en) | 1985-11-22 |
| JPH0159020B2 true JPH0159020B2 (en) | 1989-12-14 |
Family
ID=13972189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59089490A Granted JPS60235660A (en) | 1984-05-07 | 1984-05-07 | Controlling device for dehydrator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60235660A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0427551Y2 (en) * | 1986-07-30 | 1992-07-02 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5325964A (en) * | 1976-08-20 | 1978-03-10 | Koonankuratsuke Needarantsue P | Centrifugal separator |
| JPS5391465A (en) * | 1977-01-21 | 1978-08-11 | Ishikawajima Harima Heavy Ind Co Ltd | Method of controlling continuous centrifugal separator |
| JPS541058A (en) * | 1977-06-03 | 1979-01-06 | Shinko Electric Co Ltd | Method of car position detection |
| JPS5610353A (en) * | 1979-07-05 | 1981-02-02 | Suguru Katsume | Completely-enclosed type screw-carrying centrifugal separator |
-
1984
- 1984-05-07 JP JP59089490A patent/JPS60235660A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5325964A (en) * | 1976-08-20 | 1978-03-10 | Koonankuratsuke Needarantsue P | Centrifugal separator |
| JPS5391465A (en) * | 1977-01-21 | 1978-08-11 | Ishikawajima Harima Heavy Ind Co Ltd | Method of controlling continuous centrifugal separator |
| JPS541058A (en) * | 1977-06-03 | 1979-01-06 | Shinko Electric Co Ltd | Method of car position detection |
| JPS5610353A (en) * | 1979-07-05 | 1981-02-02 | Suguru Katsume | Completely-enclosed type screw-carrying centrifugal separator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60235660A (en) | 1985-11-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |