JPH027685B2 - - Google Patents
Info
- Publication number
- JPH027685B2 JPH027685B2 JP58232784A JP23278483A JPH027685B2 JP H027685 B2 JPH027685 B2 JP H027685B2 JP 58232784 A JP58232784 A JP 58232784A JP 23278483 A JP23278483 A JP 23278483A JP H027685 B2 JPH027685 B2 JP H027685B2
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- water
- water purification
- filtration
- inflow
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 59
- 238000001914 filtration Methods 0.000 claims description 27
- 238000000746 purification Methods 0.000 claims description 25
- 238000004062 sedimentation Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 3
- 239000008213 purified water Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
Landscapes
- Filtration Of Liquid (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は送水需要に応じてろ過流量を最小の変
動で制御する浄水場のろ過流量制御方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a filtration flow rate control method for a water purification plant that controls the filtration flow rate with minimal fluctuations in accordance with water supply demand.
沈殿池、ろ過池、浄水池を備えた浄水場の流入
流量は、従来送水需要と浄水池の水位に応じてオ
ペレータが設定するのが普通であつた。
Conventionally, the inflow flow rate of a water treatment plant equipped with a sedimentation basin, a filtration basin, and a water purification basin has usually been set by an operator according to the water supply demand and the water level of the water purification basin.
しかしながら需要パターンの変動や沈殿、ろ過
の応答の遅れを定量的に考慮することができない
ので、ろ過池の負荷変動が大きくなり、ろ過池の
生物膜やフイルタの能力が低下し、浄水能力の低
下やろ過池の寿命の短縮を招き、場合によつては
ろ過池のろ砂の入替頻度を増大させるなどの問題
があつた。 However, since it is not possible to quantitatively consider fluctuations in demand patterns, sedimentation, and delays in filtration response, the load fluctuations in the filtration basin become large, the biofilm of the filtration basin and the capacity of the filter decrease, and the water purification capacity decreases. This has led to problems such as shortening the service life of the filtration basin and, in some cases, increasing the frequency of replacing sand in the filtration basin.
本発明は、需要パターンおよび沈殿、ろ過の応
答遅れを定量的に考慮してろ過池の適正な目標流
量を所定の演算によつて設定し、これによつてろ
過プロセスを計画的に運用する浄水場のろ過流量
制御方法を提供することを目的としている。
The present invention provides water purification that quantitatively considers the demand pattern and response delay of sedimentation and filtration, sets an appropriate target flow rate of the filtration basin through predetermined calculations, and operates the filtration process in a planned manner. The purpose of this paper is to provide a field filtration flow rate control method.
本発明は浄水場におけるろ過流量を浄水池の送
水需要に応じて制御する浄水場のろ過流量制御方
法において、過去の送水流量データから当日の送
水需要パターンを予測する演算と、上記送水需要
パターンから所定の目的関数に基づき浄水場への
流入流量目標パターンを算出する浄水生産計画演
算と、上記浄水場への流入流量目標パターンから
所定の応答時間を考慮して沈殿池流入流量目標パ
ターンを算出するスケジユーリング演算とを有
し、算出した沈殿池流入流量目標パターンに基づ
いて沈殿池への流入流量を制御し、これによつて
送水需要の変動に対するろ過池の負荷変動を抑制
し、ろ過プロセスの能率を向上すると共にろ過池
の寿命の延長をはかつたものである。
The present invention provides a filtration flow rate control method for a water purification plant that controls the filtration flow rate in a water purification plant according to the water supply demand of a water purification pond, which includes a calculation for predicting the water supply demand pattern for the day from past water supply flow rate data, and a calculation based on the water supply demand pattern described above. A water purification production plan calculation that calculates a target flow rate pattern for inflow to the water treatment plant based on a predetermined objective function, and a target flow rate pattern for sedimentation tank inflow is calculated by considering a predetermined response time from the target flow rate pattern for inflow to the water treatment plant. The inflow flow rate to the sedimentation basin is controlled based on the calculated sedimentation basin inflow flow rate target pattern, thereby suppressing the load fluctuation of the filtration basin in response to fluctuations in water supply demand, and the filtration process This aims to improve the efficiency of the filter and extend the life of the filter.
本発明の一実施例を第１図に示す。 An embodiment of the present invention is shown in FIG.
第１図において、１は沈殿池、２はろ過池、３
は浄水池であり、原水は流入流量検出器８、調節
弁６、薬品混和槽５を通つて沈殿池１に入り、流
入出きよ４を通つて沈殿池２に入り、さらに調節
弁９および流量検出器１１を通つて浄水池３に入
り、送水流量検出器１５を通つて浄水として需要
先へ送られる。 In Figure 1, 1 is a sedimentation tank, 2 is a filtration tank, and 3
is a water purification pond, raw water enters the sedimentation basin 1 through an inflow flow rate detector 8, a control valve 6, a chemical mixing tank 5, enters the sedimentation basin 2 through an inflow/output channel 4, and then a control valve 9 and a flow rate. The water enters the water purification pond 3 through the detector 11, passes through the water supply flow rate detector 15, and is sent to the consumer as purified water.
７は調節弁６の操作電動機、１３はろ過池水位
検出器１０は調節弁９の操作電動機、１４は浄水
池水位検出器である。 Reference numeral 7 indicates an operating motor for the control valve 6, 13 indicates a filter water level detector 10, an operating motor for the control valve 9, and 14 indicates a water purification pond water level detector.
流入流量QIは流量制御装置２１により流入流
量目標値QI *(k)に一致するよう調節弁６を調整す
ることによつて制御される。 The inflow flow rate Q I is controlled by the flow rate control device 21 by adjusting the control valve 6 so as to match the inflow flow rate target value Q I * (k).
演算制御装置２２は流出流量信号Ｑおよび浄水
池水位信号Ｈを入力すると共に、データ入出力装
置２３から自己回帰モデルの係数a0〜anを入力
し、所定の演算を行なつて流入流量目標値パター
ンQI *(k)〔ｋ＝１〜24〕を算出し、この目標値パ
ターンQI *(k)に従つて流入流量QIを制御する。 The arithmetic and control device 22 inputs the outflow flow rate signal Q and the water purification tank water level signal H, and also inputs the coefficients a 0 to a n of the autoregressive model from the data input/output device 23, performs a predetermined calculation, and determines the inflow flow rate target. A value pattern Q I * (k) [k=1 to 24] is calculated, and the inflow flow rate Q I is controlled according to this target value pattern Q I * (k).
さらに上記演算の途中で得られる送水計画流量
パターンQ*(k)がデータ入出力装置２３に入力さ
れる。 Further, the planned water supply flow rate pattern Q * (k) obtained during the above calculation is input to the data input/output device 23.
なおろ過池の水位は常時監視され、負荷の状況
とフイルタの状態をデータ入出力装置２３に入力
してろ過池洗浄スケジユーリングの参考データと
して利用される。 The water level of the filter is constantly monitored, and the load status and filter status are input to the data input/output device 23 and used as reference data for filter cleaning scheduling.
以下第２図のフローチヤートを参照して演算制
御装置２２の演算ロジツクを説明する。 The arithmetic logic of the arithmetic and control unit 22 will be explained below with reference to the flowchart of FIG.
ロジツクは、需要予測ブロツク(a)、浄水生産計
画ブロツク(b)、沈殿池流入流量目標値スケジユー
リングブロツク(c)の３つのブロツクに分けられ
る。 The logic is divided into three blocks: a demand forecasting block (a), a water purification production planning block (b), and a settling tank inflow target value scheduling block (c).
先ず需要予測ブロツク(a)においては、入力され
る送水流量信号Ｑをある時間△Ｔ（例えば１時間）
ごとに積分し、毎日の各時間帯ｋごとのデータ
Qkを蓄積する。 First, in the demand forecasting block (a), the input water supply flow rate signal Q is set for a certain period of time ΔT (for example, 1 hour).
data for each time period k of each day.
Accumulate Qk.
過去数日の実績をQk（ｎ−ｌ）、Qk（ｎ−ｌ−
１）、…とすると当日ｎの予測値Q^k（ｎ）は自己
回帰モデルによつて次の(1)式であたえられる。 Qk(n-l), Qk(n-l-)
1),..., then the predicted value Q^k(n) of n on the day is given by the following equation (1) using an autoregressive model.
Q^k（ｎ）＝a0・Qk（ｎ−ｌ）
＋a1Qk（ｎ−ｌ−１）＋…＋an（ｎ−１）
………(1)
ここにa0〜anは自己回帰モデルのパラメータで
あり逐次最小二乗法で求められる。Q^k(n)=a 0・Qk(n-l) +a 1 Qk(n-l-1)+...+a n (n-1)
......(1) Here, a 0 to a n are parameters of the autoregressive model and are determined by the successive least squares method.
次に浄水生産計画ブロツク(b)において、需要パ
ターンQ^k（ｎ）を決定する時点における浄水池水
位、浄水池水位制約およびろ過流量から浄水池に
流入すべき流量目標値Q*(k)の計画（浄水生産計
画）を立てる。 Next, in the water purification production planning block (b), the target value of flow rate Q * (k) that should flow into the water purification pond from the water purification pond water level at the time of determining the demand pattern Q ^ k (n), the water treatment pond water level constraint, and the filtration flow rate. (purified water production plan).
この場合、問題は下記のように定式化される。 In this case, the problem is formulated as follows.
目的関数
l
〓k=1
（Ｉ・Ｘ(k)）2→最小 ………(2)
制約条件
｜Ｘ(k)｜＜Cx ………(3)
fo＜Q*(k)＜fx ………(4)
ここに
Q*(k)＝Ｆ・Ｙ(k)
Ｙ(k)＝Ｙ（ｋ−１）Ｘ(k)
Ｙ（０）：所定値
Hn＜Ｈ(k)＜Hx ………(5)
ここに
Ｈ(k)＝Ｆ・Ｙ(k)−Ｑ（ｎ）／Ａ＋Ｈ（ｋ−１）
Ｈ（０）：所定値
またＸ＝（x1、x2、…xd）、xi＝０または１、
（ｉ＝１〜ｄ）
Ｆ＝（f1、f2、…fd）、fi＝ろ過流量変更値〔m3／
ｈ〕、（ｉ＝１〜ｄ）
Cxは０または正の整数でＸのノルムの上限、
fx、foはろ過流量上下限値〔m2／ｈ〕、
Ｉは単位行列、
Ｙ＝（y1、y2、…Yd）、yi＝０または１（ｉ＝１
〜ｄ）
Ｈは浄水池水位〔ｍ〕、
Ａは浄水池断面積〔m2〕
Hx、Hoは浄水池水位上下限〔ｍ〕
Q^kは時間帯ｋに対する送水需要流量予測値
〔m3／ｈ〕
は排他的論理和を示す記号
である。Objective function l 〓 k=1 (I・X(k)) 2 →Minimum ………(2) Constraints |X(k)|＜C x ……(3) f o ＜Q * (k)＜ f x ………(4) Here Q * (k)=F・Y(k) Y(k)=Y(k−1)X(k) Y(0): Predetermined value Hn<H(k) <H x ………(5) Here H(k)=F・Y(k)−Q(n)/A+H(k−1) H(0): Predetermined value Also, X=(x 1 , x 2 ,...x d ), x i =0 or 1,
(i = 1 to d) F = (f 1 , f 2 , ...f d ), fi = filtration flow rate change value [m 3 /
h ] , (i = 1 to d) C x is 0 or a positive integer and is the upper limit of the norm of (y 1 , y 2 ,...Y d ), y i =0 or 1 (i = 1
~d) H is the water level of the water purification pond [m], A is the cross-sectional area of the water purification pond [m 2 ], H x , H o are the upper and lower limits of the water level of the water purification pond [m], and Q^k is the predicted water demand flow value for time period k [ m 3 /h] is a symbol indicating exclusive OR.
本問題では変数は０か１の何れかになるので０
−１整数計画法における分枝限定法（Branch
and Bound Method）を用いて解くことができ
る。 In this problem, the variable is either 0 or 1, so 0
-1 Branch and bound method in integer programming
and Bound Method).
この場合、分枝規則は組合せ列挙法を用い、特
にＸ(k)のノルムの小さい方からCxまで列挙すれ
ばよい。 In this case, the branching rules may be enumerated using a combinatorial enumeration method, particularly starting from the one with the smaller norm of X(k) up to C x .
限定値は演算途中の段階で得られた許容解の目
的関数値を用いればよい。 As the limit value, the objective function value of the allowable solution obtained in the middle of the calculation may be used.
次に沈殿池流入流量目標値スケジユーリングブ
ロツク(c)において、沈殿ろ過プロセスの応答を無
駄時間＋高次遅れ（例えば２次遅れ）で近似し、
所望の浄水生産を行なうためのダイナミツクな逆
応答をあらかじめ演算制御装置２２に記憶してお
き、これを利用して上記ブロツク(b)で得られた計
画を実現するための沈殿池流入流量目標値QI *(k)
の滑らかなスケジユール曲線を求める。 Next, in the sedimentation tank inflow target value scheduling block (c), the response of the sedimentation filtration process is approximated by dead time + higher-order lag (for example, second-order lag),
The dynamic reverse response for producing the desired purified water is stored in advance in the arithmetic and control unit 22, and this is used to determine the target value of the sedimentation tank inflow flow rate to realize the plan obtained in block (b) above. Q I * (k)
Find a smooth schedule curve.
以上説明したように本発明によれば、需要パタ
ーンと沈殿ろ過プロセスの時間遅れを定量的に考
慮してろ過流量制御を最も変動の少ないように実
行する流入流量スケジユールを決定することがで
きる。
As explained above, according to the present invention, it is possible to quantitatively consider the demand pattern and the time delay of the sedimentation filtration process, and determine the inflow flow rate schedule that executes the filtration flow rate control with the least variation.
沈殿ろ過プロセスの運用を滑らかに行なうこと
ができれば、対象プラントの持つ最大限の能力す
なわち沈殿効果、ろ砂の生物膜効果、フイルタ能
力を長時間持続させることができる。 If the sedimentation filtration process can be operated smoothly, the maximum capacity of the target plant, that is, the sedimentation effect, the biofilm effect of the filter sand, and the filter performance can be sustained for a long time.
なお上記実施例では、需要予測に逐時最小二乗
法を用いているが、例えば天候の要素を加味した
GMDH法を用いることも可能である。 Note that in the above example, the sequential least squares method is used for demand forecasting, but it is also possible to
It is also possible to use the GMDH method.
また演算制御装置と沈殿池流入流量の流量制御
装置は個別の装置で構成されているが、これらを
１つの演算制御装置にまとめることも可能であ
る。 Furthermore, although the arithmetic and control device and the flow rate control device for the inflow flow rate into the sedimentation tank are configured as separate devices, it is also possible to combine these into one arithmetic and control device.
第１図は本発明の一実施例を示す系統図、第２
図は第１図における演算制御装置の演算ロジツク
を示すフローチヤートである。
１……沈殿池、２……ろ過池、３……浄水池、
６，９……調節弁、８，１１，１５……流量検出
器、１３，１４……水位検出器、２１……流量制
御装置、２２……演算制御装置、２３……データ
入出力装置。
Figure 1 is a system diagram showing one embodiment of the present invention, Figure 2 is a system diagram showing an embodiment of the present invention.
This figure is a flowchart showing the calculation logic of the calculation and control unit in FIG. 1... Sedimentation pond, 2... Filtration pond, 3... Water purification pond,
6, 9... Control valve, 8, 11, 15... Flow rate detector, 13, 14... Water level detector, 21... Flow rate control device, 22... Arithmetic control device, 23... Data input/output device.
Claims (1)
に応じて制御する浄水場のろ過流量制御方法にお
いて、過去の送水流量データから当日の送水需要
パターンを予測する演算と、上記送水需要パター
ンから所定の目的関数に基づいて浄水場への流入
流量目標パターンを算出する浄水生産計画演算
と、上記浄水場への流入流量目標パターンから所
定の応答時間を考慮して沈殿池流入流量目標パタ
ーンを算出するスケジユーリング演算とを有し、
算出した沈殿池流入流量目標パターンに基づいて
沈殿池への流入流量を制御することを特徴とする
浄水場のろ過流量制御方法。1. In the filtration flow rate control method for a water purification plant, which controls the filtration flow rate in a water purification plant according to the water supply demand of a water treatment pond, there are two methods: A water purification production plan calculation that calculates a target flow rate pattern for inflow to a water treatment plant based on an objective function, and a schedule for calculating a target flow rate pattern for a sedimentation tank by considering a predetermined response time from the target flow rate pattern for inflow to a water treatment plant. and a Uehling operation,
A filtration flow rate control method for a water purification plant, comprising controlling the flow rate flowing into a sedimentation basin based on a calculated target pattern of inflow flow rate into the settling basin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58232784A JPS60125218A (en) | 1983-12-12 | 1983-12-12 | Method for controlling filtering flow amount of water purification plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58232784A JPS60125218A (en) | 1983-12-12 | 1983-12-12 | Method for controlling filtering flow amount of water purification plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60125218A JPS60125218A (en) | 1985-07-04 |
| JPH027685B2 true JPH027685B2 (en) | 1990-02-20 |
Family
ID=16944683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58232784A Granted JPS60125218A (en) | 1983-12-12 | 1983-12-12 | Method for controlling filtering flow amount of water purification plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60125218A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62221404A (en) * | 1986-03-20 | 1987-09-29 | Toshiba Corp | Controlling device for quick filtration pond of water treatment plant |
-
1983
- 1983-12-12 JP JP58232784A patent/JPS60125218A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60125218A (en) | 1985-07-04 |
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