JPH0718800Y2 - Process processor - Google Patents

Process processor

Info

Publication number
JPH0718800Y2
JPH0718800Y2 JP1989006324U JP632489U JPH0718800Y2 JP H0718800 Y2 JPH0718800 Y2 JP H0718800Y2 JP 1989006324 U JP1989006324 U JP 1989006324U JP 632489 U JP632489 U JP 632489U JP H0718800 Y2 JPH0718800 Y2 JP H0718800Y2
Authority
JP
Japan
Prior art keywords
raw material
flow rate
concentration
level
quality
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 - Lifetime
Application number
JP1989006324U
Other languages
Japanese (ja)
Other versions
JPH0299998U (en
Inventor
徹 平野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimadzu Corp
Original Assignee
Shimadzu Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shimadzu Corp filed Critical Shimadzu Corp
Priority to JP1989006324U priority Critical patent/JPH0718800Y2/en
Publication of JPH0299998U publication Critical patent/JPH0299998U/ja
Application granted granted Critical
Publication of JPH0718800Y2 publication Critical patent/JPH0718800Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Paper (AREA)
  • Control Of Non-Electrical Variables (AREA)

Description

【考案の詳細な説明】 (イ)産業上の利用分野 この考案は、被処理体の処理を行うプロセス処理装置、
特にプロセスの異常診断機能を有するプロセス処理装置
に関する。
[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a process processing apparatus for processing an object,
In particular, the present invention relates to a process processor having a process abnormality diagnosis function.

(ロ)従来の技術 一般に、化学プラント、各種生産処理プロセスなどのプ
ロセス処理装置には、被処理体である原料を供給する原
料供給手段と、この原料供給手段から供給される原料を
一時的に蓄蔵するバッファタンクと、このバッファタン
クから出力される原料の品質を制御する品質制御手段
と、所定品質の原料の出力流量を制御する流量制御手段
とを備えたものがある。この種のプロセス処理装置の従
来の具体例を、紙パルププラントの原質処理装置を例に
上げて説明する。
(B) Conventional technology In general, a process treatment apparatus such as a chemical plant or various production treatment processes is provided with a raw material supply means for supplying a raw material as an object to be treated and a raw material supplied from the raw material supply means temporarily. Some include a buffer tank for storing, a quality control means for controlling the quality of the raw material output from the buffer tank, and a flow rate control means for controlling the output flow rate of the raw material of a predetermined quality. A conventional specific example of this type of process processing apparatus will be described taking a raw material processing apparatus of a paper pulp plant as an example.

第4図に従来の紙パルププラントの原質処理装置のブロ
ック図を示している。同図において、被処理体のパルプ
が原料フィードポンプ1により、原料タンク4に送ら
れ、一時蓄積される原料タンク4のレベルは、レベル検
出器3で検出され、この検出出力に応じ、レベルコント
ローラ2より運転・停止指令2aを出力し、ポンプ1の制
御を行っている。原料タンク4内の原料は、さらに抜出
ポンプ5を経てスクリーン12に取り出され、精選量とし
て一定の原料が出力されるようになっている。抜出ポン
プ5より出力された原料の濃度は、濃度検出器6で検出
され、予め設定された濃度となるように濃度コントロー
ラ7で希釈水制御弁8を制御し、原料タンク4からの原
料に希釈水を合流させ、一定の濃度となるように制御し
ている。また、抜出ポンプ5より接続されるスクリーン
12への入力前に原料の圧力が圧力検出器9で検出され、
検出された圧力により圧力コントローラ10は、圧力制御
弁制御指令10aにより、圧力制御弁11を制御し、スクリ
ーン12入口圧力が一定になるように制御している。さら
に、出力側には流量検出器15が設けられ、この検出器15
により検出される流量により、流量コントローラ14が流
量制御弁制御指令14aにより、流量制御弁13を制御し、
所定の精選量が出力されるように構成されている。な
お、スクリーン12で原料の不純物がリジェクトされ、良
品の精選されたものが出力される。
FIG. 4 shows a block diagram of a conventional raw material treatment apparatus for a paper pulp plant. In the figure, the level of the raw material tank 4 in which the pulp of the object to be treated is sent to the raw material tank 4 by the raw material feed pump 1 and temporarily accumulated is detected by a level detector 3, and a level controller is detected according to the detection output. The operation / stop command 2a is output from 2 to control the pump 1. The raw material in the raw material tank 4 is further taken out to the screen 12 via the extraction pump 5, and a constant raw material is output as a selected amount. The concentration of the raw material output from the extraction pump 5 is detected by the concentration detector 6, and the dilution water control valve 8 is controlled by the concentration controller 7 so that the concentration becomes a preset concentration. The dilution water is combined to control the concentration to be constant. Also, a screen connected from the extraction pump 5
Before the input to 12, the pressure of the raw material is detected by the pressure detector 9,
The pressure controller 10 controls the pressure control valve 11 according to the pressure control valve control command 10a based on the detected pressure so that the inlet pressure of the screen 12 becomes constant. Furthermore, a flow rate detector 15 is provided on the output side.
The flow rate controller 14 controls the flow rate control valve 13 by the flow rate control valve control command 14a according to the flow rate detected by
It is configured to output a predetermined selection amount. It should be noted that impurities on the raw material are rejected on the screen 12 and a good selection is output.

(ハ)考案が解決しようとする課題 上記従来の紙パルププラントの原質処理装置では、原料
タンク4より抜出されて出力される原料は、濃度制御系
で一定の濃度となるように制御されている。供給原料濃
度が薄くなると、濃度コントローラ7は、濃度検出器6
で検出される濃度を一定に保つために、希釈水制御弁8
を閉じ、濃度を一定に保つように働く。しかしながら、
さらに原料タンク4よりの濃度が薄くなると、希釈水制
御弁8が完全に閉じてもなお、所定の濃度が得られなく
なる状態となる。この状態で、初めてシステムは原料タ
ンク4内の原料の低濃度を知ることができ、その以前に
状態では、濃度が薄くなってきていても、濃度検出器
6、濃度コントローラ7、希釈水制御弁8の濃度制御系
において濃度が一定に保たれるため、システムとして
は、その濃度が薄くなっていることを知ることができな
い。上記した状態で初めて原料タンク4の中の原料の低
濃度を知ることができる。
(C) Problems to be Solved by the Invention In the above-described conventional raw material treatment apparatus for a paper pulp plant, the raw material extracted from the raw material tank 4 and output is controlled by the concentration control system so as to have a constant concentration. ing. When the feed material concentration becomes low, the concentration controller 7 causes the concentration detector 6
Dilution water control valve 8 to keep the concentration detected in
Closes and works to keep the concentration constant. However,
When the concentration from the raw material tank 4 is further reduced, the predetermined concentration cannot be obtained even when the dilution water control valve 8 is completely closed. In this state, for the first time, the system can know the low concentration of the raw material in the raw material tank 4, and in the state before that, even if the concentration becomes low, the concentration detector 6, the concentration controller 7, the dilution water control valve Since the density is kept constant in the density control system of No. 8, the system cannot know that the density is low. Only in the state described above, the low concentration of the raw material in the raw material tank 4 can be known.

このような状態で原料の低濃度を知り得ても、直ぐには
適正な対応をなすことができず、従来は、処理装置を停
止させるか、あるいは精選量の出力を極端に小さくする
などの処理を取らざるをえなかった。そのため、生産の
後工程を含めると稼働率が大きく低下するという問題が
あった。
Even if it is possible to know the low concentration of the raw material in such a state, it is not possible to take an appropriate action immediately, and in the past, processing such as stopping the processing equipment or reducing the output of the selected amount to an extremely small value was performed. I had to take it. Therefore, there is a problem that the operation rate is significantly reduced when the post-production process is included.

この考案は、上記問題点に着目してなされたものであっ
て、プロセスの異常を早期に診断し得るプロセス処理装
置を提供することを目的としている。
The present invention has been made in view of the above problems, and an object thereof is to provide a process processing device capable of early diagnosing a process abnormality.

(ニ)課題を解決するための手段及び作用 この考案のプロセス処理装置は、被処理体である原料を
供給する原料供給手段と、この原料供給手段から供給さ
れる原料を一時的に蓄蔵するバッファタンクと、このバ
ッファタンクから出力される原料の品質を制御する品質
制御手段と、所定品質の原料の出力流量を制御する流量
制御手段を備えるものにおいて、前記流量制御手段の出
力流量を検出する流量検出器と、前記品質制御手段の調
節量を検出する品質調節量検出手段と、前記バッファタ
ンクのレベルを検出するレベル検出器と、このレベル検
出器の出力よりレベル変化率を算出するレベル変化率測
定手段と、前記流量検出器で検出される出力流量、前記
品質調節量検出手段で検出された品質調節量、及び前記
レベル変化率測定手段で測定されたレベル変化率に基づ
いて異常を診断する異常診断装置を特徴的に備えてい
る。
(D) Means and Actions for Solving the Problem The process treatment apparatus of the present invention temporarily stores the raw material supply means for supplying the raw material which is the object to be treated and the raw material supplied from the raw material supply means. A buffer tank, quality control means for controlling the quality of the raw material output from the buffer tank, and flow rate control means for controlling the output flow rate of the raw material of a predetermined quality are detected, and the output flow rate of the flow rate control means is detected. A flow rate detector, a quality adjustment amount detection unit that detects the adjustment amount of the quality control unit, a level detector that detects the level of the buffer tank, and a level change that calculates a level change rate from the output of the level detector. Rate measuring means, the output flow rate detected by the flow rate detector, the quality adjustment amount detected by the quality adjustment amount detecting means, and the level change rate measuring means. An abnormality diagnosis device for diagnosing an abnormality based on the level change rate is characteristically provided.

このプロセス処理装置において、流量検出器で検出され
る出力流量(精選量)とタンクのレベル変化率との関係
は、設定品質濃度を一定とした場合、例えば第2図に示
すような特性となるので、精選量が検出されると対応す
る適正レベル変化率が得られる。そのため、バッファタ
ンク内のレベル変化率を実測し、この実測値が、予め精
選量に対応する適正レベル変化率と比較され、所定の範
囲外になると異常であると早期に判定することができ
る。
In this process processor, the relationship between the output flow rate (selected amount) detected by the flow rate detector and the level change rate of the tank has a characteristic as shown in FIG. 2 when the set quality concentration is constant. Therefore, when the selected amount is detected, the corresponding appropriate level change rate is obtained. Therefore, it is possible to measure the level change rate in the buffer tank, compare this measured value with an appropriate level change rate corresponding to the selected amount in advance, and if it is out of a predetermined range, it can be determined early that it is abnormal.

(ホ)実施例 以下、実施例により、この考案をさらに詳細に説明す
る。
(E) Embodiment Hereinafter, the present invention will be described in more detail with reference to embodiments.

第1図は、この考案の一実施例を示すパルプ調成工程の
原質処理装置のブロック図であり、同図において、第4
図のもとの同一番号を付したものは同一のものを示して
いる。
FIG. 1 is a block diagram of a raw material treatment device in a pulp preparation process showing an embodiment of the present invention. In FIG.
The same reference numerals in the drawings indicate the same things.

第3図に同処理装置の前処理構成を示しており、コンベ
ア31上に投入された故紙の塊(生原料)32は、コンベア
31で搬送され、パルパ33内に投入され、この33内で破砕
され、水と撹拌され、ポンプ34、サイクロン35を経てチ
ェスタ36に原料紙料が蓄蔵される。第1図に対応させる
と、ポンプ34は原料フィードポンプ1に、チェスタ36は
原料タンク4に相当する。再び第1図において、原料タ
ンク4のレベルは、レベル連続検出器18で連続的に検出
され、この検出された信号がレベルコントローラ2に入
力されるとともに、タンクレベル信号18aとして原料濃
度異常診断装置17に入力されている。所定品質設定であ
る濃度設定値が濃度コントローラ7から設定信号7aとし
て、また、希釈水制御弁8の開度検出器16が希釈水制御
弁開度信号16aを品質調節量手段として原料濃度異常診
断装置17に入力され、同様に流量検出器15の出力、つま
り精選流量信号15aが、原料濃度異常診断装置17に入力
されている。この原料濃度異常診断装置17では、濃度設
定信号7a、精選流量信号15a、濃度制御弁開度信号16a、
タンクレベル信号18aにより原料の供給系の異常を診断
する。さらに、精選流量信号15aは、比率演算器19に入
力され、比率演算器19は、リジェクト制御弁20を制御し
ている。
FIG. 3 shows the pretreatment structure of the processing apparatus. The waste paper block (raw material) 32 put on the conveyor 31 is a conveyor.
The raw paper stock is stored in the Chester 36 via the pump 34, the cyclone 35, and is crushed in the pulper 33, crushed in the 33, and agitated with water. Corresponding to FIG. 1, the pump 34 corresponds to the raw material feed pump 1, and the chester 36 corresponds to the raw material tank 4. Referring again to FIG. 1, the level of the raw material tank 4 is continuously detected by the level continuous detector 18, the detected signal is input to the level controller 2, and the raw material concentration abnormality diagnosing device is supplied as the tank level signal 18a. It has been entered in 17. The concentration setting value, which is a predetermined quality setting, is used as the setting signal 7a from the concentration controller 7, and the raw material concentration abnormality diagnosis is performed by the opening detector 16 of the dilution water control valve 8 using the dilution water control valve opening signal 16a as the quality adjustment amount means. It is input to the device 17, and similarly, the output of the flow rate detector 15, that is, the selected flow rate signal 15a is input to the raw material concentration abnormality diagnosis device 17. In this raw material concentration abnormality diagnosis device 17, the concentration setting signal 7a, the selective flow rate signal 15a, the concentration control valve opening signal 16a,
An abnormality in the raw material supply system is diagnosed by the tank level signal 18a. Further, the carefully selected flow rate signal 15a is input to the ratio calculator 19, which controls the reject control valve 20.

今、ある所定品質濃度に対して、一定濃度の原料が供給
されたとすると、送出精選量に対する原料タンク4のレ
ベル変化率は、第2図のNの特性とする。しかし、精選
量が一定でも、供給原料濃度が変わることにより、濃度
コントローラ7が働き一定濃度になるように希釈水制御
弁8が操作される。原料タンク4のレベルは低レベルL
になれば、レベルコントローラ2が動作し、原料フィー
ドポンプ1を運転し、逆に高レベルHになれば、やはり
レベルコントローラ2が動作し、ポンプ1を停止するよ
うに制御している状態で、精選量Faの時、a点のレベル
下降変化率がある時、レベルがLに達し、次の原料が供
給され、レベルがHに達すると、供給原料の濃度とタン
ク内原料の濃度が混合された新しい濃度の原料となり、
再びレベルが下降する。希釈水制御弁8の容量により最
大希釈容量が決まり、精選量Faにおける制御可能な原料
濃度範囲が決まる。最大濃度制御可能時は希釈水制御弁
8が全開時で、最小濃度制御可能時は希釈水制御弁8が
全閉時である。これらの各々のレベル下降変化率は、b
点、c点となる。送出精選量の最小量FMINから最大量F
MAXまでの制御可能な原料最小濃度時の下降レベル変化
率特性Lとの交点d、eと、制御可能な原料最大濃度時
の下降レベル変化率特性Hとの交点f、gが制御系全体
として制御可能範囲となる。
Assuming that a certain concentration of raw material is supplied to a certain quality concentration, the rate of change of the level of the raw material tank 4 with respect to the amount of the carefully selected delivery is the characteristic N in FIG. However, even if the selected amount is constant, the concentration controller 7 operates and the dilution water control valve 8 is operated so that the concentration controller 7 operates to change the concentration of the feed material. The material tank 4 has a low level L
If it becomes, the level controller 2 operates and the raw material feed pump 1 is operated. Conversely, if the level becomes high H, the level controller 2 also operates and the pump 1 is stopped. When the selected amount Fa is the level of change rate of the level at point a, the level reaches L, the next raw material is supplied, and when the level reaches H, the concentration of the raw material and the concentration of the raw material in the tank are mixed. It becomes a new concentration of raw material,
The level goes down again. The maximum dilution volume is determined by the volume of the dilution water control valve 8, and the controllable raw material concentration range in the selected amount Fa is determined. When the maximum concentration control is possible, the dilution water control valve 8 is fully open, and when the minimum concentration control is possible, the dilution water control valve 8 is fully closed. The rate of change of the level decrease of each of these is b
Points and c points. Minimum amount F MIN to maximum amount F
Intersection d between the falling level change rate characteristic L controllable during feedstock minimum concentration of up to MAX, e and, the intersection f of the falling level change rate characteristic H at controllable material maximum density, g is the overall control system It is within the controllable range.

一定濃度制御状態では、希釈水制御弁8の開度信号16a
と流量信号15aの関数でレベル変化率は供給原料の濃度
に換算される。それゆえ、この実施例装置では、原料濃
度異常診断装置17で、濃度設定値7a、精選量信号15a、
希釈水制御弁開度信号16a、タンクのレベル信号18aを取
り入れ内部で第2図に示す演算を行い、レベルの下降変
化率を知り、また、原料濃度の異常を知ることができ
る。
In the constant concentration control state, the opening signal 16a of the dilution water control valve 8
As a function of the flow rate signal 15a, the rate of level change is converted into the concentration of the feedstock. Therefore, in this embodiment, in the raw material concentration abnormality diagnosis device 17, the concentration set value 7a, the selected amount signal 15a,
By taking in the dilution water control valve opening signal 16a and the tank level signal 18a, the calculation shown in FIG. 2 can be performed internally to know the rate of change in the falling level and the abnormality in the raw material concentration.

なお、レベルの上昇方向も同様な方法で特性を演算する
ことにより、変化率の負、正の両方向での診断が可能で
ある。
By calculating the characteristics in the same manner in the level increasing direction, it is possible to perform diagnosis in both the negative and positive directions of the change rate.

(ヘ)考案の効果 この考案によれば、設定品質信号と品質調節量と、流量
出力信号と、タンクのレベル変化率とに基づき異常診断
を行うもので、プロセスの運転支援ができるとともに、
異常発生を待たずに安全運転のレベル変化率を設定する
ことにより、事前処理が可能であり、また運転にオンラ
インで組み込めば、前処理プロセスを含めたトータル制
御が可能であり、全体処理装置の稼働率を向上させるこ
とができる。また、前段階で品質(例えば濃度)が測り
難い成分等の処理に適用が可能である。
(F) Effect of the device According to this device, abnormality diagnosis is performed based on the set quality signal, the quality adjustment amount, the flow rate output signal, and the tank level change rate.
Pre-processing is possible by setting the level change rate of safe driving without waiting for the occurrence of an abnormality, and if it is incorporated into the operation online, total control including the pre-processing process is possible and the total processing equipment The operating rate can be improved. Further, it can be applied to the processing of components whose quality (for example, concentration) is difficult to measure in the previous stage.

【図面の簡単な説明】[Brief description of drawings]

第1図は、この考案の一実施例を示すパルプ調成工程の
原質処理装置のブロック図、第2図は、同装置における
異常診断装置の動作を説明するための特性図、第3図
は、第1図に示した実施例装置の前処理プロセスを説明
するための図、第4図は、従来のパルプ調成工程の原質
処理装置のブロック図である。 4:原料タンク、6:濃度検出器、7:濃度コントローラ、8:
希釈水制御弁、15:流量検出器、17:原料濃度異常診断装
置、18:レベル連続検出器。
FIG. 1 is a block diagram of a raw material treatment device in a pulp preparation process showing an embodiment of the present invention, FIG. 2 is a characteristic diagram for explaining the operation of an abnormality diagnosis device in the device, and FIG. FIG. 4 is a diagram for explaining the pretreatment process of the apparatus of the embodiment shown in FIG. 1, and FIG. 4 is a block diagram of a conventional raw material treatment device in the pulp conditioning process. 4: Raw material tank, 6: Concentration detector, 7: Concentration controller, 8:
Dilution water control valve, 15: Flow rate detector, 17: Raw material concentration abnormality diagnostic device, 18: Level continuous detector.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】被処理体である原料を供給する原料供給手
段と、この原料供給手段から供給される原料を一時的に
蓄蔵するバッファタンクと、このバッファタンクから出
力される原料の品質を制御する品質制御手段と、所定品
質の原料の出力流量を制御する流量制御手段を備えるプ
ロセス処理装置において、 前記流量制御手段の出力流量を検出する流量検出器と、
前記品質制御手段の調節量を検出する品質調節量検出手
段と、前記バッファタンクのレベルを検出するレベル検
出器と、このレベル検出器の出力よりレベル変化率を算
出するレベル変化率測定手段と、前記流量検出器で検出
される出力流量、前記品質調節量検出手段の検出調節
量、及び前記レベル変化率測定手段で測定されたレベル
変化率に基づいて、供給原料の品質異常を診断する異常
診断装置とを備えたことを特徴とするプロセス処理装
置。
1. A raw material supply means for supplying a raw material which is an object to be treated, a buffer tank for temporarily storing the raw material supplied from the raw material supply means, and a quality of the raw material output from the buffer tank. In a process processing device comprising a quality control unit for controlling and a flow rate controlling unit for controlling an output flow rate of a raw material of a predetermined quality, a flow rate detector for detecting an output flow rate of the flow rate controlling unit,
Quality adjustment amount detecting means for detecting the adjustment amount of the quality control means, level detector for detecting the level of the buffer tank, level change rate measuring means for calculating the level change rate from the output of the level detector, An abnormality diagnosis for diagnosing a quality abnormality of the feed material based on the output flow rate detected by the flow rate detector, the detected adjustment amount of the quality adjustment amount detection means, and the level change rate measured by the level change rate measurement means. A process processing device, comprising:
JP1989006324U 1989-01-23 1989-01-23 Process processor Expired - Lifetime JPH0718800Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1989006324U JPH0718800Y2 (en) 1989-01-23 1989-01-23 Process processor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989006324U JPH0718800Y2 (en) 1989-01-23 1989-01-23 Process processor

Publications (2)

Publication Number Publication Date
JPH0299998U JPH0299998U (en) 1990-08-09
JPH0718800Y2 true JPH0718800Y2 (en) 1995-05-01

Family

ID=31210428

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989006324U Expired - Lifetime JPH0718800Y2 (en) 1989-01-23 1989-01-23 Process processor

Country Status (1)

Country Link
JP (1) JPH0718800Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7340808B2 (en) * 2019-03-22 2023-09-08 デュプロ精工株式会社 Waste paper processing equipment

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5847912U (en) * 1981-09-29 1983-03-31 三菱製紙株式会社 Pipeline concentration adjustment device

Also Published As

Publication number Publication date
JPH0299998U (en) 1990-08-09

Similar Documents

Publication Publication Date Title
JPH05324006A (en) Device and method of controlling process
KR930002569A (en) How to control profit improvement of woven factory
TR201801733U5 (en) Arrangement for controlling a dewatering process
US4731176A (en) Control system for froth flotation processes
JPH0718800Y2 (en) Process processor
US4732651A (en) Method for monitoring and controlling a pulp washing system
JP3842296B2 (en) Apparatus and method for feeding stock to a paper machine
US4840704A (en) Controlling characteristics of a pulp mat on a pulp washing surface
US4746405A (en) System for cellulose pulp washing control
SE9703758D0 (en) Method and procedure for process control in the manufacture of paper, pulp or board
US20070168075A1 (en) Method and installation for processing waste paper
JPH0938684A (en) Waste water treating device
WO1996011284A1 (en) Process for controlling a drying plant and arrangement therefor
CA1203407A (en) System for washing pulp
US4889599A (en) Apparatus for continuously measuring the soda loss in a pulp washing system
JPH10325092A (en) Automatic control of concentration of filtered white water in wire part of paper making machine, apparatus therefor and method for setting target concentration of filtered white water
JPH10122506A (en) Controller for water supply of steam generator
SU654716A1 (en) Pulp bleaching process automatic control apparatus
SU742896A1 (en) Automatic apparatus for continuous producing of alkaline cellulose
Crawford Optimizing polymer consumption in sludge dewatering applications
JPH01132891A (en) Screening apparatus
JPH07274911A (en) Method for regulating concentration of mixed liquor for laver making
SU1631092A1 (en) System of automated control ofthe procss of metering a lime suspension for successive predefecation in sugar production
SU954936A1 (en) Cellulose production process control method
SU990533A1 (en) Apparatus for automatic control of asbestos-concrete sheet-moulding machine