JPS59228911A - Device for controlling filtration rate of vacuum dehydrator - Google Patents
Device for controlling filtration rate of vacuum dehydratorInfo
- Publication number
- JPS59228911A JPS59228911A JP58105115A JP10511583A JPS59228911A JP S59228911 A JPS59228911 A JP S59228911A JP 58105115 A JP58105115 A JP 58105115A JP 10511583 A JP10511583 A JP 10511583A JP S59228911 A JPS59228911 A JP S59228911A
- Authority
- JP
- Japan
- Prior art keywords
- dehydrator
- signal
- vacuum
- flow rate
- vacuum dehydrator
- 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.)
- Pending
Links
Landscapes
- Filtration Of Liquid (AREA)
- Control Of Velocity Or Acceleration (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、真空吸引部と連続回転する無端状の炉布ベ
ルトを有する真空脱水機の濾過速度を制御<る装置に関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for controlling the filtration speed of a vacuum dehydrator having a vacuum suction section and an endless furnace cloth belt that rotates continuously.
従来、真空脱水機の濾過速度はその運転員の経験あるい
は勘によって一定運転条件を定められるのが通常であっ
た。このため、最適な運転条件で運転されないばかりか
、時々刻々と変化する脱水機の供給汚泥性状に対応でき
ず、安定した脱水処理を行なえないという欠点があった
。Conventionally, the filtration speed of a vacuum dehydrator has usually been determined under certain operating conditions based on the experience or intuition of the operator. For this reason, not only is the system not operated under optimal operating conditions, it is also unable to respond to the ever-changing properties of the sludge supplied to the dehydrator, resulting in the drawback that stable dewatering cannot be performed.
この発明は、上記のような従来の運転方法の欠点を除去
するためになされたもので、脱水機への供給汚泥の流量
、脱水機のp液流量、洗浄水流量といった比較的容易に
計測できるものを用いて迅速にかつ正確に真空脱水機の
湿潤ケーキの濾過速度を算出し、これを一定に保つよう
に真空脱水機の回転数を制御することにより、・時々刻
々変化する供給汚泥性状の変化にも十分対応でき、安定
した脱水処理が行なえる制御装置を提供することを目的
としている。This invention was made in order to eliminate the drawbacks of the conventional operating method as described above, and it is possible to relatively easily measure the flow rate of sludge supplied to the dehydrator, the flow rate of P liquid in the dehydrator, and the flow rate of washing water. By quickly and accurately calculating the filtration rate of the wet cake in the vacuum dehydrator using a device and controlling the rotation speed of the vacuum dehydrator to keep it constant, the The purpose is to provide a control device that can sufficiently respond to changes and perform stable dehydration processing.
以下、この発明の一実施例を図について説明する。図に
おいて、1は真空脱水機であり、図示なしの真空吸引部
、速度計1a、モータ1b及びP布ベルト1Cを有じ
その下側に汚泥ピット2を備えている。汚泥ビット2は
管路3より汚泥が供給され、脱水によるp液は管路4に
導かれる。一方、p布ベルト1Cを含む真空脱水機1の
各部を洗浄するための水は管路5を介して真空脱水機1
に供給される。管路3.4及び5にはそれぞれ流量計3
a、4a及び5aが接続され、その流量を測定し、測定
結果の信号S3、s4、s5は演算器6に入力される。An embodiment of the present invention will be described below with reference to the drawings. In the figure, 1 is a vacuum dehydrator, which includes a vacuum suction section (not shown), a speedometer 1a, a motor 1b, and a P cloth belt 1C.
A sludge pit 2 is provided below. The sludge bit 2 is supplied with sludge from a pipe 3, and the p liquid resulting from dewatering is guided to a pipe 4. On the other hand, water for washing each part of the vacuum dehydrator 1 including the p-cloth belt 1C is supplied to the vacuum dehydrator 1 through a pipe 5.
supplied to Lines 3.4 and 5 each have a flow meter 3.
a, 4a, and 5a are connected to measure the flow rate, and the measurement result signals S3, s4, and s5 are input to the calculator 6.
演算器6は以下で説明する(1)式の演算を実行し、そ
の結果の信号S6を調節計7に入力する。調節計7は設
定計8及び9から湿潤ケーキの濾過速度を設定する信号
S8及び脱水機1のドラム回転速度の基準値を示す信号
S9も入力し、以下で説明する(2)式の演算を実行し
、その結果である信号S7を調節計10に供給する。調
節計10は、真空脱水機1に取り付けられ、その回転速
度を測定する速度計1aより速度信号即ち信号S1が入
力され、真空脱水機1に取シ付けられ、それを回転させ
るモータ1bに駆動信号である信号810を供給する。The calculator 6 executes the calculation of equation (1) described below, and inputs the resulting signal S6 to the controller 7. The controller 7 also inputs a signal S8 for setting the filtration speed of the wet cake from the setting meters 8 and 9 and a signal S9 indicating the reference value of the drum rotation speed of the dehydrator 1, and calculates the equation (2) described below. The resultant signal S7 is supplied to the controller 10. The controller 10 is attached to the vacuum dehydrator 1, and receives a speed signal, that is, a signal S1, from a speedometer 1a that measures the rotation speed of the controller 10, and is attached to the vacuum dehydrator 1 and is driven by a motor 1b that rotates it. A signal 810 is provided.
つぎに動作について説明する。湿潤ケーキシ過速度は、
単位時間に単位面積当りに発生する湿潤ケーキ量であり
、供給汚泥量とp液量の差で示されるが、実施設におい
ては炉布ベルト1c及び真空脱水機1の洗浄に用いられ
る洗浄水もあるので、演算器6は次式の演算をする。Next, the operation will be explained. Wet cake overspeed is
It is the amount of wet cake generated per unit area in unit time, and is indicated by the difference between the amount of supplied sludge and the amount of P liquid. Therefore, the calculator 6 calculates the following equation.
Rw=(Qi−Qo+Qw)/A 曲回−(1)
ここで、RW:湿潤ケーキの一過速度
Qi:供給汚泥の流量
Qo : F液の流量
QW:洗浄水の流量
A :濾過面積
本発明の場合、Qi% QO% Qwはそれぞれ流量計
3as4a及び5aの信号S3、S4及びS5として得
られる。濾過速度1(wは信号S8としてこれより出力
される。調節計7は、湿潤ケーキの濾過速度を一定に制
御するべく基準濾過速度である信号S8と検出された濾
過速度である信号S6との差に応じて、脱水機1のドラ
ム叩ちモータ1bの回転速度を調節するため、次式の演
算をする。Rw=(Qi-Qo+Qw)/A number of songs - (1)
Here, RW: Transient rate of wet cake Qi: Flow rate of supplied sludge Qo: Flow rate of F liquid QW: Flow rate of washing water A: Filtration area In the case of the present invention, Qi% QO% Qw is the flowmeter 3as4a and 5a, respectively are obtained as signals S3, S4 and S5. The filtration rate 1 (w is outputted from this as a signal S8. The controller 7 controls the filtration rate between the reference filtration rate signal S8 and the detected filtration rate signal S6 in order to control the filtration rate of the wet cake constant. In order to adjust the rotational speed of the drum beating motor 1b of the dehydrator 1 according to the difference, the following equation is calculated.
N=N”十G(l(w−RW勺 ・・・・・・
・・・(2)ここで、Rw”は設定器8によって設定さ
れた基準濾過速度即ち信号S8、Gは調節計7のゲイン
、Nは真空脱水機1のドラムの回転速度の目標値となる
もので、調節計10への信号S7である。N”は真空脱
水機1のドラムの基準回転速度即ち信号S9である。調
節計10は真空脱水機1の速度計1aの信号S1と調節
計7の信号S7を用い、真空脱水機1のドラムを駆動す
るモータ1bを信号S10により調節することにより、
ドラムの回転速度を調節する。N=N"10G(l(w-RW)...
(2) Here, Rw" is the reference filtration speed set by the setting device 8, that is, the signal S8, G is the gain of the controller 7, and N is the target value of the rotation speed of the drum of the vacuum dehydrator 1. This is the signal S7 to the controller 10. N'' is the reference rotational speed of the drum of the vacuum dehydrator 1, that is, the signal S9. The controller 10 uses the signal S1 of the speedometer 1a of the vacuum dehydrator 1 and the signal S7 of the controller 7, and adjusts the motor 1b that drives the drum of the vacuum dehydrator 1 using the signal S10.
Adjust the rotation speed of the drum.
なお、上記実施例は回路をアナログ回路で構成したが、
時間不連続のアナログ式(サンプリング式)やディジタ
ル式の回路により構成しても上記実施例と同様の効果を
奏する。In addition, although the circuit in the above embodiment was configured with an analog circuit,
The same effects as in the above embodiments can be obtained even if a time-discontinuous analog type (sampling type) or digital type circuit is used.
以上のように、この発明によれば、供給汚泥の流量、脱
水p液の流量、洗浄水の流量といった比較的容易に計測
できるものを用いて迅速Kかつ正確に真空脱水機の湿潤
ケーキの濾過速度を算出し、これを一定に保22.うに
真空脱水機の回転速度を制御するようにしたので、時々
刻々変化する供給汚泥の性状の変化忙も十分対応でき、
安定した脱水処理が行なえるという極めて優れた効果が
ある。As described above, according to the present invention, the wet cake of a vacuum dehydrator can be filtered quickly and accurately using relatively easily measured flow rates such as the flow rate of supplied sludge, the flow rate of dehydrated P liquid, and the flow rate of washing water. Calculate the speed and keep it constant22. Since the rotation speed of the sea urchin vacuum dehydrator is controlled, it is able to cope with the constantly changing properties of the supplied sludge.
It has an extremely excellent effect of being able to perform stable dehydration treatment.
図はこの発明の一実施例による真空脱水機の沖過速度制
御装置のブロック図である。
1・・・真空脱水機、 2・・・汚泥ピッ)、3,4
゜5・・・管路、 6・・・演算器、 7 ・・・調
節計、8.9・・・設定器、 1a・・・速度計、
1b・・・モータ、 1c・・・炉布ベルト、
3a、4a、’5a・・・流量計。
代理人 □(は力橿名)東京都大田区
大森本町−丁目1
番1号−312
■出 願 人 三菱電機株式会社
東京都千代田区丸の内2丁目2
番3号The figure is a block diagram of an offshore overspeed control device for a vacuum dehydrator according to an embodiment of the present invention. 1...Vacuum dehydrator, 2...Sludge pick), 3,4
゜5... Pipeline, 6... Arithmetic unit, 7... Controller, 8.9... Setting device, 1a... Speed meter,
1b...motor, 1c...furnace belt,
3a, 4a, '5a...Flowmeter. Agent □ (name of Riki) 312-1-1, Omori Honmachi-chome, Ota-ku, Tokyo ■Applicant Mitsubishi Electric Corporation 2-2-3 Marunouchi, Chiyoda-ku, Tokyo
Claims (1)
る真空脱水機の濾過速度制御装置において、上記脱水機
へ供給する汚泥の流量、そのF液の流量及び上記真空脱
水機を洗浄する洗浄水の流量をそれぞれ測定する流量計
と、上記各流量計の出力により上記真空脱水機の湿潤ケ
ーキの濾過速度を算出する演算回路と、この演算回路に
より算出された上記濾過速度と予め設定された基準濾過
速度との差に応じた出力を発生する第1調節計と、この
第1調節計の出力に応じて上記真空脱水機を1駆動する
モータの回転数を調節する第2調節計とを備えた真空脱
水機の濾過速度制御装置。In a filtration speed control device for a vacuum dehydrator having a vacuum suction section and a continuously rotating endless P cloth belt, the flow rate of sludge supplied to the dehydrator, the flow rate of its F liquid, and cleaning for cleaning the vacuum dehydrator are provided. A flowmeter that measures the flow rate of water, an arithmetic circuit that calculates the filtration rate of the wet cake of the vacuum dehydrator based on the output of each of the flowmeters, and a preset filtration rate calculated by the arithmetic circuit. A first controller that generates an output according to the difference from the reference filtration speed, and a second controller that adjusts the rotation speed of the motor that drives the vacuum dehydrator according to the output of the first controller. Vacuum dehydrator filtration speed control device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58105115A JPS59228911A (en) | 1983-06-13 | 1983-06-13 | Device for controlling filtration rate of vacuum dehydrator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58105115A JPS59228911A (en) | 1983-06-13 | 1983-06-13 | Device for controlling filtration rate of vacuum dehydrator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59228911A true JPS59228911A (en) | 1984-12-22 |
Family
ID=14398826
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58105115A Pending JPS59228911A (en) | 1983-06-13 | 1983-06-13 | Device for controlling filtration rate of vacuum dehydrator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59228911A (en) |
-
1983
- 1983-06-13 JP JP58105115A patent/JPS59228911A/en active Pending
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