JPH04174789A - Controller for changing papermaking speed and exchanging brand in papermaking of paper machine - Google Patents
Controller for changing papermaking speed and exchanging brand in papermaking of paper machineInfo
- Publication number
- JPH04174789A JPH04174789A JP29962490A JP29962490A JPH04174789A JP H04174789 A JPH04174789 A JP H04174789A JP 29962490 A JP29962490 A JP 29962490A JP 29962490 A JP29962490 A JP 29962490A JP H04174789 A JPH04174789 A JP H04174789A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- manual intervention
- operation pattern
- papermaking
- changing
- 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
- 230000008859 change Effects 0.000 claims abstract description 26
- 238000003908 quality control method Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 12
- 210000000988 bone and bone Anatomy 0.000 description 7
- 230000004044 response Effects 0.000 description 3
- 239000010893 paper waste Substances 0.000 description 2
- 101150093826 par1 gene Proteins 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 240000001931 Ludwigia octovalvis Species 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000003809 water extraction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Paper (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業」二の利用分野〉
本発明は、製紙工業で使用される抄紙機の制御装置に係
り、特に製造している紙の単位時間製造量を定める抄速
の変更や銘柄を変更する抄替制御の改良に関する。[Detailed Description of the Invention] <Field of Application in Industry> The present invention relates to a control device for a paper machine used in the paper manufacturing industry, and in particular, to a control device for controlling a paper machine used in the paper manufacturing industry, and particularly for changing the paper making speed that determines the amount of paper produced per unit time. This paper relates to improvements in paper change control for changing paper stocks and brands.
〈従来の技術〉
抄紙機め抄替制御は、例えば本出願人の堤案に係る特公
昭５９−１１７１８号（特許第１２３６１９１−リ）、
特公昭５９−２４２４０号（特許第１２４７５８８号）
及び特公昭５９−２７４３７号（特許第１２５０４２７
号）公報に開示されている。第７図は」１記公報などに
開示されている従来の抄紙機及びその制御装置の構成ブ
ロック［ン１である。図において、ヘッドボックスＨＢ
から吐き出された原料は、ワイヤパー１− Ｗ Ｐを通
過することによって搾水され、ドライヤＤＲを通過する
ことによって乾燥され、リールＲｌ−に巻き収られる。<Prior art> Paper changing control for paper machines is disclosed, for example, in Japanese Patent Publication No. 59-11718 (Patent No. 1236191-li), which was proposed by the present applicant.
Special Publication No. 59-24240 (Patent No. 1247588)
and Special Publication No. 59-27437 (Patent No. 1250427)
No.) Disclosed in the official gazette. FIG. 7 shows a configuration block 1 of a conventional paper machine and its control device disclosed in Publication No. 1 and the like. In the figure, head box HB
The raw material discharged from the wire parer 1-WP is squeezed, dried by passing through the dryer DR, and wound onto the reel Rl-.
ワイヤパー１− Ｗ Ｐの搾水による白水はピットＰＴ
で受は取られ、ファンポンプＰＭＰによってヘッドボッ
クスＨＢに還元される。Wire Par 1 - White water from W P's water extraction goes to Pit PT.
The receiver is removed and returned to the head box HB by the fan pump PMP.
坪量と水分率は、リールＲ１−の直前において、センサ
ＢＭによってそれぞれ測定されて紙質制御部１０に送ら
れる９紙質制御部１０は坪量の目標値と測定値との偏差
を基に必要な種流量を演算すると共に、水分率のＨＢ値
と測定値との面差を基に必要な乾燥度をリーえるエネル
ギを有する蒸気温度（流星）を演算する。種口弁制御部
２０では紙質制御部１０から送られる種流量を基礎に弁
開度を演算して種口弁Ｖ Ｌ、 Ｖにリーえ、紙質制御
部１０と協同して共に坪量を設定値に制御している。蒸
気制御部３０は紙質制御部１０から送られる蒸気流量の
指示値を基に蒸気圧を求め、スチームパルプＳＴ■に与
え、紙質制御部１０と共同して水分率を設定値に制御し
ている。抄替制御部４０は銘柄変更などの抄替指令を受
けて、予め抄替期間終了時点に於いて坪量や水分率を目
標値に一致させるため種流量や蒸気流量を演算し、これ
ら流量の変化率が一定範囲内になるように指令値を補正
して種口弁制御部２０や蒸気制御部３ｏに与え、いわゆ
るフィードフォワード制御をしている。この抄速変更・
抄替制御における蒸気予測は、例えば次式により行われ
ている。The basis weight and moisture content are measured by the sensor BM immediately before the reel R1-, and sent to the paper quality control unit 10. In addition to calculating the seed flow rate, the steam temperature (meteor) that has the energy to reach the required degree of dryness is calculated based on the difference between the HB value of the moisture content and the measured value. The seed opening valve control section 20 calculates the valve opening degree based on the seed flow rate sent from the paper quality control section 10 and applies it to the seed opening valves V L and V, and also sets the basis weight together with the paper quality control section 10. Controlled by value. The steam control unit 30 determines the steam pressure based on the steam flow rate instruction value sent from the paper quality control unit 10, applies it to the steam pulp ST■, and controls the moisture content to a set value in cooperation with the paper quality control unit 10. . In response to a grade change command such as a brand change, the grade change control unit 40 calculates the seed flow rate and steam flow rate in advance to make the basis weight and moisture content match the target values at the end of the grade change period, and adjusts these flow rates. The command value is corrected so that the rate of change falls within a certain range and is given to the seed valve control section 20 and the steam control section 3o, thereby performing so-called feedforward control. This paper speed change・
Steam prediction in the papermaking change control is performed, for example, using the following equation.
Ｐ２＝Ｐ １ ・（１＋ａ （ΔＲ／Ｒ，））２・（１
＋ｂ（ΔＰＤ／ＰＩ）））２
・（η＋Ｃ（ΔＭＰ／ＭＰ））２
・（１＋ｄ（ΔＶ／Ｖ））２
−（１＋ｅ（ΔＡＤ／ＡＤ）：）” （＋）
ここで、Ｐｌは初期蒸気圧、Ｐ２は目標蒸気圧、Ｒは生
産量、Ｐ Ｄはパルプ絶乾坪量、ＭＰは水分率、■は抄
速、ＡＤは絶乾灰分量である。また、ΔＲは（目標生産
量−初期生産量）、ΔＰＤは（目標パルプ絶乾坪量−初
期パルプ絶乾坪量）、ΔＭＰは（目標水分率−初期水分
率）、Δ■は（目標抄速−初期抄速）、ΔＡＤは（目標
絶乾灰分量−初期絶乾灰分量）である。P2=P 1 ・(1+a (ΔR/R,))2・(1
+b(ΔPD/PI)))2 ・(η+C(ΔMP/MP))2 ・(1+d(ΔV/V))2 −(1+e(ΔAD/AD):)” (+)
Here, Pl is the initial steam pressure, P2 is the target steam pressure, R is the production volume, PD is the pulp bone dry basis weight, MP is the moisture content, ■ is the papermaking speed, and AD is the bone dry ash content. In addition, ΔR is (target production amount - initial production amount), ΔPD is (target pulp bone dry basis weight - initial pulp bone dry basis weight), ΔMP is (target moisture content - initial moisture content), and Δ■ is (target pulp dry basis weight - initial pulp bone dry basis weight). speed - initial papermaking speed), ΔAD is (target bone dry ash content - initial bone dry ash content).
第８図は抄替指令に対するシステムの応答図である。紙
質制御部１０により所定紙質の紙を当初製造していると
する。砂層指令かあると制御権が紙質制御部１０から抄
替制御部４０に移り、抄紙機を止めることなく坪量や抄
速を新たな目標値に連続的に移行さゼるのに必要な制御
出力か成される。新たな目標値に至ると、再び紙質制御
部１０か制御権を得て新たな坪量・水分率の紙を製造す
る。FIG. 8 is a diagram showing the response of the system to the reshuffling command. It is assumed that the paper quality control unit 10 initially manufactures paper of a predetermined quality. When there is a sand layer command, control is transferred from the paper quality control unit 10 to the paper change control unit 40, which performs the necessary control to continuously shift the basis weight and papermaking speed to new target values without stopping the paper machine. The output is made. When a new target value is reached, the paper quality control section 10 again gains control and produces paper with a new basis weight and moisture content.
〈発明が解決しようとする課題〉
しかしながら、第８図の破線に示すごとくオペレータか
手動介入する場合かある。この手動介入は、例えはドラ
イヤ内部に設けられたシリンダ本数の変更等の操作条件
の変更を実施する際に行う。<Problems to be Solved by the Invention> However, as shown by the broken line in FIG. 8, there are cases where an operator manually intervenes. This manual intervention is performed when changing operating conditions, such as changing the number of cylinders provided inside the dryer.
このとき、シリンダ本数を変更した場合の最適条件は予
め経験的に知られており、例えば図中−点鎖線て表わし
たものになる。従来は、一端蒸気予測演算が行われた後
に手動介入がなされると、予め定められた操作パターン
が使用できなくなり、−点鎖線で示す操作パターンを手
動で実現する必要があった。他方、手動操作時にはオペ
レータが蒸気のみならず、種口弁、トータルヘッド、抄
速などを一手に操作しなければならす、自動操作時に比
較して数倍の時間を要し、損紙か増大すると言う課題が
あっな。At this time, the optimum conditions when the number of cylinders is changed are known in advance from experience, and are, for example, as shown by the dashed line in the figure. Conventionally, when manual intervention is performed after the steam prediction calculation has been performed, the predetermined operation pattern becomes unusable, and it is necessary to manually implement the operation pattern shown by the - dotted chain line. On the other hand, when operating manually, the operator must control not only the steam, but also the seed opening valve, total head, machine speed, etc., which takes several times as long as when operating automatically, and increases the amount of paper waste. I have a problem to talk about.
本発明はこのような課題を解決したもので、抄紙機の抄
速変更・抄替制御時に手動介入して操作条件を変更した
場合にも最適操作条件での操業をオペレータに依存しな
いで行う制御装置を提供することを目的とする。The present invention solves these problems, and provides control that allows operations to operate under optimal operating conditions without depending on the operator, even when the operating conditions are changed by manual intervention during paper speed change and paper type change control of a paper machine. The purpose is to provide equipment.
く課題を解決するための手段〉
このような目的を達成する本発明は、種口弁を通じて供
給される原料を収容するヘッドボックスと、このヘッド
ボックスから抄速に応じて吐出される内容物を搾水する
ワイヤパー１〜と、このワイヤパートで搾水された内容
物を蒸気を用いて乾燥させるドライヤと、このドライヤ
で乾燥された紙を巻き取るリールを備えた抄紙機を制御
する装置であって、次の構成としたものである。Means for Solving the Problems> The present invention that achieves the above objects comprises a head box for accommodating the raw material supplied through the seed opening valve, and the contents discharged from the head box according to the machine speed. This is a device for controlling a paper machine, which is equipped with a wire par 1 for extracting water, a dryer for drying the content extracted by the wire part using steam, and a reel for winding up the paper dried by the dryer. The structure is as follows.
即ち、前記ドライヤとリールの間に設けられ、製造中の
紙の紙質を測定するセンサと、抄速変更・抄替の指令に
従って従前の紙質から目標の紙質を得るのに必要な操作
パターンを求める予測演算部と、手動介入により当該予
測演算部の演算の基礎となる前記抄紙機のプロセス条件
が変更されたとき、前記予測演算部に代えて変更後のプ
ロセス条件に適合する操作パターンを、設定されたパラ
メータに基づいて定める手動介入演算部と、この予測演
算部若しくは手動介入演算部の出力する操作パターンに
従い、前記抄紙機の操作端を操作して前記センサの測定
値を目標値に一致させる制御をする紙質制御部とを具備
している。That is, a sensor is provided between the dryer and the reel to measure the paper quality of the paper being manufactured, and an operation pattern necessary to obtain the target paper quality from the previous paper quality is determined in accordance with instructions for changing the paper speed and changing the paper size. When the process conditions of the paper machine, which are the basis of the calculations of the prediction calculation unit, are changed due to manual intervention, an operation pattern matching the changed process conditions is set in place of the prediction calculation unit. a manual intervention calculation section that is determined based on the parameters determined, and an operation end of the paper machine according to an operation pattern output from the prediction calculation section or the manual intervention calculation section to make the measured value of the sensor match the target value. and a paper quality control section for controlling the paper quality.
く作 用〉
本発明の各構成要素は次の作用をする。センサは抄紙機
の製造している紙の紙質を測定している。Functions Each component of the present invention has the following functions. The sensor measures the quality of paper produced by the paper machine.
紙質制御部は抄紙機の操作端に制御信号を送り、センサ
の測定値か目標値となるように制御している。予測演算
部は、抄紙機のプロセス条件に変更のない場合の抄速変
更・抄替時における操作パターンを演算して、紙質制御
部に与える。手動介入演算部は、抄紙機のプロセス条件
に変更ある場合の抄速変更・抄替時における操作パター
ンを演算して、紙質制御部に与える。この演算はこのプ
ロセス条件に応じたパラメータを与えることにより行う
。The paper quality control section sends a control signal to the operating end of the paper machine to control the sensor measurement value to match the target value. The prediction calculation unit calculates an operation pattern for changing the paper machine speed or changing the paper size when there is no change in the process conditions of the paper machine, and provides the result to the paper quality control unit. The manual intervention calculation section calculates an operation pattern for changing the paper speed or changing the paper size when there is a change in the process conditions of the paper machine, and provides the result to the paper quality control section. This calculation is performed by giving parameters according to the process conditions.
〈実施例〉 以下図面を用いて、本発明を説明する。<Example> The present invention will be explained below using the drawings.
第１図は本発明の一実施例を示す構成ブロック図である
。尚第１図において、前記第７図と同一作用をするもの
には同一符号をつけ説明を省略する。図において、抄紙
プロセスには紙の灰分（アッシュ）を供給するマシンチ
エストＭＣと、このマシンチエストＭＣから送られたア
ッシュ分を含む原料（パルプ）をバルブＶ Ｌ Ｖ及び
ポンプＰＭＰを介してヘッドポックストｆＢに送る種箱
ＳＢか設けられている。FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, parts having the same functions as those in FIG. 7 are given the same reference numerals and their explanations will be omitted. In the figure, the papermaking process includes a machine chest MC that supplies paper ash, and a raw material (pulp) containing ash sent from the machine chest MC to a headbox fB via a valve VLV and a pump PMP. There is also a seed box SB to send to.
センサ信号処理部５０はセンサＢＭの測定した坪量、水
分率、灰分率などの測定値を例えば紙幅方向に平均値を
とって紙質制御部８０に渡している。予測演算部６０は
抄速変更・抄替の指令に従って従前の紙質から目標の紙
質を得るのに必要な走査パターンを求めるもので、例え
は前述した（１）式を用いる。紙の銘柄は予め指定され
ているので、製造すべき紙質は予測演算部６０に送られ
ている。The sensor signal processing unit 50 averages the measured values such as basis weight, moisture content, and ash content measured by the sensor BM in the width direction of the paper, and sends the average value to the paper quality control unit 80 . The prediction calculation unit 60 determines the scanning pattern necessary to obtain the target paper quality from the previous paper quality in accordance with the instructions for changing the paper machine speed and changing the paper size, and uses the above-mentioned equation (1) as an example. Since the brand of paper is specified in advance, the quality of paper to be manufactured is sent to the prediction calculation section 60.
手動介入演算部７０は手動介入により予測演算部６０の
演算の基礎となる抄紙機のプロセス条件（例えばカレン
ダの内部条件）か変更されたとき、設定されたパラメー
タに基づいて変更後のプロセス条件に適合する操作パタ
ーンを演算する。切替部７５は通常は予測演算部６０を
採択し、手動介入があったときは手動介入演算部７０を
採択するスイッチ手段である。When the process conditions of the paper machine (for example, the internal conditions of the calendar), which are the basis of the calculation of the prediction calculation unit 60, are changed due to manual intervention, the manual intervention calculation unit 70 adjusts the process conditions to the changed process conditions based on the set parameters. Compute a matching operation pattern. The switching unit 75 is a switch means that normally selects the prediction calculation unit 60 and selects the manual intervention calculation unit 70 when there is manual intervention.
紙質制御部８０は切替部７５から送られる操作パターン
に従って、抄紙機の操作端を操作してセンサＢＭの測定
値を目標値に一致させる制御を行うもので、ここでは水
分率に対しては蒸気、坪量に対しては種口弁、灰分率に
対してはアッシュを制御している。即ち、蒸気制御部８
２は切替部７−〇−
５から送られる蒸気操作パターンに従い、スチームバル
ブＳ ＴＶに弁開度制御信号を送り、蒸気エネルギを調
整して目標とする水分率の紙にしている。種口弁制御部
８４は切替部７５から送られる坪量操作パターンに従い
、種口弁Ｖ １．、 Ｖに弁開度制御信号を送り、種流
量を調整して目標とする坪量の紙にしている。アッシュ
制御部８６は切替部７５から送られる灰分率操作パター
ンに従い、アッシュをマシンチエストＭＣに送る弁に弁
開度制御信号を送り、アッシュ量を調整して目標とする
灰分率の紙にしている。The paper quality control section 80 operates the operating end of the paper machine according to the operation pattern sent from the switching section 75 to control the measured value of the sensor BM to match the target value. The basis weight is controlled by the seed valve, and the ash content is controlled by the ash. That is, the steam control section 8
2 sends a valve opening control signal to the steam valve STV according to the steam operation pattern sent from the switching section 7-0-5, and adjusts the steam energy to produce paper with a target moisture content. The seed opening valve control section 84 controls the seed opening valve V1 according to the basis weight operation pattern sent from the switching section 75. , V sends a valve opening control signal to adjust the seed flow rate to produce paper with the target basis weight. The ash control section 86 sends a valve opening control signal to the valve that sends ash to the machine chest MC in accordance with the ash content operation pattern sent from the switching section 75, and adjusts the ash amount to produce paper with the target ash content.
第２図は手動介入演算部７０の詳細説明図である。操作
パターン演算部７１は与えられたパラメータにしたかっ
て操作パターンを演算するもので、予測演算部６０と共
用にしてもよい。この演算は、（１）式のパラメータを
与えるものて次のような演算をする。蒸気圧目標値Ｐ２
’とすると係数ａは次式％式％
その他の係数す、ｃ、ｄ、ｅはそれぞれセロになってい
る。これらの値を（１）式に代入すると次のようになる
。FIG. 2 is a detailed explanatory diagram of the manual intervention calculation section 70. The operation pattern calculation unit 71 calculates an operation pattern according to the given parameters, and may be used in common with the prediction calculation unit 60. This calculation is performed as follows based on the parameters of equation (1). Steam pressure target value P2
', then the coefficient a is the following formula % formula % The other coefficients s, c, d, and e are each zero. Substituting these values into equation (1) yields the following.
Ｐ ２ ＝ Ｐ ＩＸ（−ｈ ａ （ΔＩＲ，／ Ｒ）
：）２＝ Ｐ ２ ’ （３）但し、△Ｒがゼロのと
きは生産量か変化しないなめ蒸気圧を変化させる必要が
ないところから、次の値とする。P 2 = P IX(-h a (ΔIR,/R)
:)2=P2' (3) However, when ΔR is zero, the production volume does not change and there is no need to change the steam pressure, so the following value is used.
Ｐ ２ ＝ Ｐ １ （
４）プレ手動エンｌ〜り用バッファ７２は抄速変更・抄
替前の状態量を操作パターン演算部７１に送るもので、
設定値Ｓ■の設定はオペレータの手動入力でもよく銘柄
設定部７４から入力してもよい。アフタ手動エントリ用
バッファ７３は抄速変更・抄替後の状態量を操作パター
ン演算部７１に送るもので、設定値Ｓ■の設定はプレ手
動エン１〜り用バッファ７２と同様である。銘柄設定部
７４はオペレータが抄速変更・抄替に習熟すると紙の銘
柄毎に入力すべき値がわかるので、予め銘柄毎にプレ蒸
気圧、アフタ蒸気圧などのパラメータを記憶しておいて
、抄速変更・抄替時に手動介入があるとプレ手動エント
リ用バッファ７２及びアフタ手動−１１＝
エンｌ−り用バッファ７３に必要なパラメータを送り、
操作パターン演算部７１に対する設定作業を容易にする
。モード用スイッチ７５は切替部７５のことで、操作パ
ターン演算部７１及び銘柄設定部７４に予測演算部６０
が担当しているが手動介入により手動介入演算部７０が
担当するかを知らせている。P 2 = P 1 (
4) The pre-manual engine restart buffer 72 is for sending the state quantity before changing the machine speed or changing the paper machine to the operation pattern calculation unit 71.
The setting value S■ may be manually input by the operator or may be input from the brand setting section 74. The after-manual entry buffer 73 sends the state quantity after the machine speed change and paper change to the operation pattern calculating section 71, and the setting of the set value S■ is the same as the pre-manual entry buffer 72. The brand setting section 74 can store parameters such as pre-steam pressure, after-steam pressure, etc. for each brand in advance, so that once the operator becomes familiar with paper speed changes and paper changes, he or she will know the values to be input for each paper brand. When there is manual intervention at the time of changing the paper speed or replacing the paper, necessary parameters are sent to the pre-manual entry buffer 72 and the after-manual entry buffer 73.
The setting work for the operation pattern calculating section 71 is facilitated. The mode switch 75 is a switching section 75, which includes an operation pattern calculation section 71, a brand setting section 74, and a prediction calculation section 60.
However, through manual intervention, it is notified whether the manual intervention calculation unit 70 is in charge.
第３図は第１図の装置の動作を説明する流れ図である。FIG. 3 is a flowchart illustrating the operation of the apparatus of FIG.
抄速変更・抄替が発生ずると予測演算部６０は銘柄など
の演算に必要な情報の入力などを行う（ＳＩＯ）。また
紙質制御部８０に対する制御開始か可能になると、実行
フラグがオンする（Ｓ２０）。モード用スイッチ７５を
見て、手動介入かあったか否か判断する（Ｓ３０）。手
動介入があれば、手動介入演算部７０が操作パターンを
演算する（Ｓ４０）。手動介入がなＣ−）れは予測演算
部６０は銘柄毎に記憶された係数ａ・〜ｅをバッファか
ら取り込む（Ｓ５０〉。そして、必要に応じてリミッ１
〜処理を行ない（Ｓ６０）、紙質制御部８０に操作パタ
ーンをグーえる。When a change in paper machine speed or a change in paper stock occurs, the prediction calculation unit 60 inputs information necessary for calculations such as the brand name (SIO). Further, when it becomes possible to start controlling the paper quality control section 80, the execution flag is turned on (S20). The mode switch 75 is checked to determine whether manual intervention has occurred (S30). If there is manual intervention, the manual intervention calculation unit 70 calculates an operation pattern (S40). C-) If manual intervention is not required, the prediction calculation unit 60 takes in the coefficients a to e stored for each brand from the buffer (S50>. Then, if necessary, set the limit 1).
~ processing is performed (S60), and the operation pattern is sent to the paper quality control section 80.
第４図は蒸気操作パターンの説明図である。予測演算部
６０は破線で示ずものを出力するが、手動介入によって
手動介入演算部７０εＪ実践て示すものを出力する。FIG. 4 is an explanatory diagram of the steam operation pattern. The prediction calculation unit 60 outputs what is shown by the broken line, but by manual intervention, the manual intervention calculation unit 70εJ actually outputs what is shown.
第５図は本発明の他の実施例を示す構成ブロック図であ
る。第１図の装置との相違を説明すると、紙質制御部８
０の操作パターン入力側にリミット処理部９０を設（つ
でいる。リミッ１へ処理部９０は予測演算部６０まなは
手動介入演算ざ（；７０から与えられる一回の操イヤ量
か過大である場合に、一定値に抑えて紙質制御部８０に
出力する。過大な変化を防止するのは、ドライヤの蒸気
圧か大１１Ｊに変化するとボイラ）・リップなどの不都
合を招来するからである。この結果、変更時間が長くな
ると共に、１〜−タルの変化量自体はリミット処理部９
０の有無によらず同一になっている。FIG. 5 is a block diagram showing another embodiment of the present invention. To explain the difference from the device shown in FIG. 1, the paper quality control section 8
A limit processing section 90 is installed on the operation pattern input side of 0.The processing section 90 for limit 1 determines whether the amount of one operation given from the prediction calculation section 60 or the manual intervention calculation time (;70) is excessive. In some cases, it is suppressed to a constant value and output to the paper quality control section 80. Excessive changes are prevented because if the vapor pressure of the dryer changes to a large 11 J, it will cause problems such as boiler lip. As a result, the change time becomes longer and the amount of change from 1 to -tal itself is limited to the limit processing unit 9.
It is the same regardless of the presence or absence of 0.
第６図は種流星制御に第１図の装置を適用した場合の説
明図で、（Ａ）は抄速、（Ｂ）は絶乾坪量、（Ｃ）は種
流量である。へ・ンドボ・ンクスＪ（Ｂで大「ＬＪに原
料が流出すると、従来の予測演算部６１’Ｑ−
○の予測（実線）が現実のプロセス状態と事前して、目
標とする絶乾坪量の得られないことがある。FIG. 6 is an explanatory diagram when the apparatus shown in FIG. 1 is applied to seed meteor control, in which (A) is the machine speed, (B) is the absolute dry basis weight, and (C) is the seed flow rate. When the raw material flows into the LJ (LJ), the prediction of the conventional prediction calculation unit 61'Q- There are times when you can't get it.
この場合には、手動介入演算部７０を用いて修正し、破
線のように種流量を増加させて目標とする絶乾坪量の紙
の製造が可能になる。In this case, the manual intervention calculation unit 70 is used to make corrections and increase the seed flow rate as shown by the broken line, thereby making it possible to manufacture paper with the target absolute dry basis weight.
アッシュ流量についても、予め調成側て流入してしまう
場合には、抄紙工程でのアッシュ流量の目標値か合わな
いことかある。アッシュ流量を抄紙工程で全量流入させ
ることを前提に灰分率制御を行なっているなめである。Regarding the ash flow rate, if the ash flows into the preparation side in advance, the target value of the ash flow rate in the papermaking process may not be met. The ash content is controlled on the premise that the entire amount of ash flows into the papermaking process.
この場合にも、手動介入してオペレータの経験則により
アッシュ流量を手動エンドすすれは目標とする灰分率の
紙が製造できる。In this case as well, paper with a target ash content can be produced by manually intervening and adjusting the ash flow rate according to the operator's experience.
〈発明の効果〉
以上説明したように、本発明によれは抄速変更・抄替時
に手動介入が発生しなとき予測演算部６０から手動介入
演算部７０に切り替えて紙質制御部８０に操作パターン
を与えているのて、オペレータか手動制御する場合に比
軸して損紙が減少する。<Effects of the Invention> As explained above, according to the present invention, when manual intervention does not occur at the time of changing the paper speed or replacing paper, the prediction calculation unit 60 switches to the manual intervention calculation unit 70 and the operation pattern is sent to the paper quality control unit 80. Paper waste is reduced proportionally when the operator or manual control is provided.
−１４＝
まな実施例のように、新規の銘柄のときはプレ手動エン
１〜り用バッファ７２及びアフタ手動エン１へり用バッ
ファ７３にパラメータを手動設定し、経１倹によりパラ
メータが解っている銘柄については銘柄設定部７４を用
いている場合には、効率良く三「動介入演算部７０の操
作ができる。-14= As in the example, when it is a new brand, the parameters are manually set in the buffer 72 for pre-manual engine 1 and the buffer 73 for after-manual engine 1, and the parameters are known by 1 time. Regarding brands, when the brand setting section 74 is used, the operation of the dynamic intervention calculation section 70 can be performed efficiently.
第１図は本発明の一実施例を示す構成ブロック図、第２
図は手動介入演算部７０の詳細説明図、第３図は第１図
の装置の動作を説明する流れ図、第４図は蒸気操作パタ
ーンの説明図、第５図は本発明の他の実施例を示す構成
ブロック図、第６１２１は種流量制御に第１図の装置を
適用した場合の説明１ン］である。
第７図は従来の抄紙機及びその制御装置の構成ブロック
図、第８図は抄替指令に対するシステムの応答図である
。
ＢＭ・・・センサ、６０・・・予１ｊｌｌ演算部、７０
・・手動介入演算部、８０・・・紙質制御部。
−１５−、−
ＮＮ
θ−Ｑ−
【絶 （
＼−＼−（FIG. 1 is a configuration block diagram showing one embodiment of the present invention, and FIG.
3 is a flowchart illustrating the operation of the device shown in FIG. 1, FIG. 4 is a diagram illustrating a steam operation pattern, and FIG. 5 is a diagram illustrating another embodiment of the present invention. 6121 is a block diagram illustrating a case in which the device shown in FIG. 1 is applied to seed flow rate control. FIG. 7 is a block diagram of a conventional paper machine and its control device, and FIG. 8 is a diagram of the system's response to a papermaking change command. BM...Sensor, 60...Pre-1jll calculation unit, 70
...Manual intervention calculation section, 80...Paper quality control section. -15-, - NN θ-Q- [absolutely (\-\-(
Claims (1)
クスと、このヘッドボックスから抄速に応じて吐出され
る内容物を搾水するワイヤパートと、このワイヤパート
で搾水された内容物を蒸気を用いて乾燥させるドライヤ
と、このドライヤで乾燥された紙を巻き取るリールを備
えた抄紙機を制御する装置であって、 前記ドライヤとリールの間に設けられ、製造中の紙の紙
質を測定するセンサと、 抄速変更・抄替の指令に従って従前の紙質から目標の紙
質を得るのに必要な操作パターンを求める予測演算部と
、 手動介入により当該予測演算部の演算の基礎となる前記
抄紙機のプロセス条件が変更されたとき、前記予測演算
部に代えて変更後のプロセス条件に適合する操作パター
ンを、設定されたパラメータに基づいて定める手動介入
演算部と、 この予測演算部若しくは手動介入演算部の出力する操作
パターンに従い、前記抄紙機の操作端を操作して前記セ
ンサの測定値を目標値に一致させる制御をする紙質制御
部と、 を具備することを特徴とする抄紙機の抄速変更・抄替制
御装置。[Claims] A head box that accommodates the raw material supplied through the seed opening valve, a wire part that squeezes the contents discharged from the head box according to the machine speed, and A device for controlling a paper machine that is equipped with a dryer that dries the contents of paper using steam, and a reel that winds up the paper that has been dried by the dryer, and that is installed between the dryer and the reel and that is installed during production. A sensor that measures the quality of paper, a predictive calculation unit that determines the operation pattern necessary to obtain the target paper quality from the previous paper quality according to instructions for changing paper speed and paper type, and a prediction calculation unit that uses manual intervention to control the calculations of the prediction calculation unit. When the basic process conditions of the paper machine are changed, a manual intervention calculation unit that replaces the prediction calculation unit and determines an operation pattern that matches the changed process conditions based on set parameters; A paper quality control section that controls the operation end of the paper machine to match the measured value of the sensor with a target value according to the operation pattern output by the calculation section or the manual intervention calculation section. This is a paper machine speed change and paper change control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29962490A JP2884765B2 (en) | 1990-11-05 | 1990-11-05 | Speed change / change control device for paper machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29962490A JP2884765B2 (en) | 1990-11-05 | 1990-11-05 | Speed change / change control device for paper machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04174789A true JPH04174789A (en) | 1992-06-22 |
| JP2884765B2 JP2884765B2 (en) | 1999-04-19 |
Family
ID=17875016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29962490A Expired - Fee Related JP2884765B2 (en) | 1990-11-05 | 1990-11-05 | Speed change / change control device for paper machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2884765B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012167414A (en) * | 2011-02-16 | 2012-09-06 | Duplo Seiko Corp | Papermaking device and waste paper recycling apparatus |
| US8833513B2 (en) | 2010-09-17 | 2014-09-16 | Matsushou Co., Ltd. | Exhaust muffler provided with tail pipe |
-
1990
- 1990-11-05 JP JP29962490A patent/JP2884765B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8833513B2 (en) | 2010-09-17 | 2014-09-16 | Matsushou Co., Ltd. | Exhaust muffler provided with tail pipe |
| JP2012167414A (en) * | 2011-02-16 | 2012-09-06 | Duplo Seiko Corp | Papermaking device and waste paper recycling apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2884765B2 (en) | 1999-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5718060A (en) | Method of and apparatus for controlling moisture content of a web product at the time of changing the grade of the web product on a paper machine | |
| US20030089479A1 (en) | Device for controlling or regulating the basis weight of a paper or cardboard web | |
| US3619360A (en) | Basis weight control system for a papermaking machine | |
| US7566382B2 (en) | Method and arrangement for controlling short circulation in a paper machine or the like | |
| US9309625B2 (en) | Concept to separate wet end and dry end paper machine control through estimation of physical properties at the wire | |
| CA2296721A1 (en) | Method and apparatus for executing grade change in paper machine | |
| JP2009185442A (en) | Method for preparing web of tissue material | |
| US7279072B2 (en) | Method and apparatus for adjusting operation of wire section | |
| EP1077284A2 (en) | Paper manufacturing and processing machine with closed loop control system | |
| JPH04174789A (en) | Controller for changing papermaking speed and exchanging brand in papermaking of paper machine | |
| JP4162864B2 (en) | Paper machine control method and apparatus | |
| JP3178498B2 (en) | Paper thickness control device of paper machine | |
| US20200385927A1 (en) | Method for determining the dryness of a fibrous web, and method for controlling or regulating a machine for producing a paper web, and computer program for carrying out the methods | |
| JP2004263309A (en) | Method for controlling, controller, program and storage medium of paper machine | |
| JPH0411089A (en) | Device and method for changing paper-making speed of paper-making machine and for controlling paper change thereof | |
| 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 | |
| JP2947075B2 (en) | Moisture control device for paper machine | |
| US20230407567A1 (en) | Method of controlling the drying of cellulose pulp in a drying step of a pulp production process | |
| JPS62257494A (en) | Control apparatus of pepermaking machine | |
| WO2000034578A1 (en) | Method for executing grade change on a paper machine | |
| JPH02289195A (en) | Dehydration controller | |
| SU946959A1 (en) | Method of automatic control of asbestos-concrete sheet-moulding machine | |
| JPH0429796B2 (en) | ||
| JPH07258990A (en) | Controller for start-up basis weight | |
| JP2684659B2 (en) | Slice lip pattern initial value setting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |