JPS5831373B2 - Temperature control method and device for continuous strip heat treatment furnace - Google Patents
Temperature control method and device for continuous strip heat treatment furnaceInfo
- Publication number
- JPS5831373B2 JPS5831373B2 JP9459777A JP9459777A JPS5831373B2 JP S5831373 B2 JPS5831373 B2 JP S5831373B2 JP 9459777 A JP9459777 A JP 9459777A JP 9459777 A JP9459777 A JP 9459777A JP S5831373 B2 JPS5831373 B2 JP S5831373B2
- Authority
- JP
- Japan
- Prior art keywords
- control
- temperature
- flow rate
- fuel flow
- line speed
- 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
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Control Of Heat Treatment Processes (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Control Of Temperature (AREA)
Description
【発明の詳細な説明】
本発明は、鋼帯等の条帯材の連続熱処理炉において、ラ
イン速度の変更に対して自動的に炉出口における条帯材
を所定の温度に保持するための温度制御装置に関する。Detailed Description of the Invention The present invention provides a continuous heat treatment furnace for strip materials such as steel strips, which automatically maintains the temperature of the strip material at a predetermined temperature at the furnace outlet in response to changes in line speed. Regarding a control device.
以下に例として銅帯について説明するに、一般に銅帯の
連続加熱炉に於ては、炉の加熱のための燃料供給量は、
鋼帯を所定の温度まで加熱するに要する有効熱量と、炉
壁から放散されたり排ガスが持ち去ったりする損失熱量
との合計値となる。Taking a copper strip as an example below, in general, in a continuous heating furnace for copper strip, the amount of fuel supplied for heating the furnace is:
It is the sum of the effective amount of heat required to heat the steel strip to a predetermined temperature and the amount of heat lost due to radiation from the furnace wall or carried away by exhaust gas.
前記有効熱量は、条帯材の材質、厚み、巾、ライン速度
によって決定され、特定の条帯材の連続加熱炉の場合は
、材質、厚み、巾の変更に対しての有効熱量の変更は容
易に計算出来て、温度制御は容易であるが、ライン速度
の変更にもかかわらず炉出口の条帯材の温度を一定に保
つための温度制御は、その都度手動による試行制御によ
るほか途なく、安定するまでの間は、通過鋼帯は品質が
不安定で、不満足であり、特に条帯材が銅帯で深絞り用
冷延鋼板製造用の連結焼鈍の時に要求される高精度制御
は不能であり、又試行制御中に発生する不良品による歩
留り低下に対して、ライン速度変更に対して迅速に応答
できる温度制御方法が強く求められてきた。The effective heat amount is determined by the material, thickness, width, and line speed of the strip material, and in the case of a continuous heating furnace for a specific strip material, the effective heat amount cannot be changed due to changes in the material, thickness, and width. It is easy to calculate and temperature control is easy, but in order to maintain the temperature of the strip at the outlet of the furnace constant despite changes in line speed, the only way to control the temperature is through manual trial control each time. , until it stabilizes, the quality of the passing steel strip is unstable and unsatisfactory, especially when the strip material is a copper strip and the high precision control required when connecting annealing for the production of cold-rolled steel sheets for deep drawing is difficult. In addition, there has been a strong demand for a temperature control method that can quickly respond to changes in line speed in order to avoid a decrease in yield due to defective products that occur during trial control.
叙上の要請に対して本発明では、条帯材の炉出口温度を
一定に保つために、条帯材の厚さ、巾、ライン速度と、
燃料消費量との関係につき、既往のデータを活用し、ラ
イン速度の変更に際して、燃料供給流量を自動的に制御
して、炉出口の条帯材の温度を所定値に保持する制御方
法を提供するものである。In response to the above-mentioned requirements, in the present invention, in order to keep the furnace outlet temperature of the strip material constant, the thickness, width, and line speed of the strip material,
We provide a control method that automatically controls the fuel supply flow rate and maintains the temperature of the strip material at the furnace outlet at a predetermined value when changing the line speed by utilizing existing data regarding the relationship with fuel consumption. It is something to do.
連続加熱炉内には１以上の独立した制御帯域があり、例
を連続焼鈍炉にとると多くの制御帯域がある。There is one or more independent control zones in a continuous furnace; for example, in a continuous annealing furnace, there are many control zones.
本発明は各制御帯域毎に、炉雰囲気測定用の温度計と、
燃料流量制御装置と、燃料流量計算装置と、炉出口の条
帯材の温度計とを設ける事により叙上の制御を実施せん
とするものである。The present invention includes a thermometer for measuring the furnace atmosphere for each control zone,
The above control is implemented by providing a fuel flow rate control device, a fuel flow rate calculation device, and a thermometer for the strip material at the furnace outlet.
本技術は放射加熱による条帯材の加熱制御に関するもの
であり、直火、ラジアントチューブ等による間接加熱、
その他のヒーターの各種の加熱手段を含むものであり、
かつ、酸化炉、還元炉等雰囲気炉にも及ぶが、実施例と
しては、バーナタイプの炉について説明を進める。This technology is related to heating control of strip materials using radiation heating, and includes direct heating, indirect heating using radiant tubes, etc.
It includes various heating means of other heaters,
The present invention also covers atmosphere furnaces such as oxidation furnaces and reduction furnaces, but as an example, a burner type furnace will be explained.
連続加熱炉の制御帯域で、その燃料消費量を計算するに
は、まず、条帯材の炉内における加熱曲線を推定し、次
に、この加熱曲線に基いて、各制御帯域ごとの熱収支よ
り燃料消費量を求める手段となる。To calculate the fuel consumption in the control zone of a continuous heating furnace, first estimate the heating curve of the strip material in the furnace, and then calculate the heat balance for each control zone based on this heating curve. It becomes a means of determining fuel consumption.
加熱曲線の推定の為の数式を次に示す。（１）式はバー
ナによる雰囲気と、条帯材との間の熱伝達が殆んど放射
熱伝達のみによって行なわれるとして、熱収支を計算し
たものである。The formula for estimating the heating curve is shown below. Equation (1) calculates the heat balance assuming that the heat transfer between the atmosphere caused by the burner and the strip material is carried out almost exclusively by radiation heat transfer.
ここでＴｚ ｉ、 Ｔｈ、 Ｖ、に実操業のデータを代
入し、ρ、Ｃｐに物理定数を代入し、さらに炉入口温度
Ｔｉｎを与えて炉入口から炉出口まで条帯のパスに沿っ
て積分し、炉出口における条帯材の温度Ｔｏを求める事
ができる。Here, substitute actual operation data for Tz i, Th, and V, substitute physical constants for ρ, and Cp, and further give the furnace inlet temperature Tin to integrate along the path of the strip from the furnace inlet to the furnace outlet. Then, the temperature To of the strip material at the furnace outlet can be determined.
但、ｃｐはＴの関数であるので積分の過程で、Ｔに応じ
て変化させるを要する。However, since cp is a function of T, it must be changed according to T during the integration process.
更にεは、予め未知であるが、適当と思う値を仮に入れ
て積分をして、Ｔｏを求め、実際操業でＴｏを求め、積
分値が実測値と一致するようにεを調整する。Further, although ε is unknown in advance, a value thought to be appropriate is provisionally inserted and integrated to obtain To. To is obtained during actual operation, and ε is adjusted so that the integrated value matches the actually measured value.
好ましいε値が両肩の計算に於て使用される。The preferred ε value is used in the shoulder calculations.
従って、炉内のパス方向Ｘに応じてＴを求め得る。Therefore, T can be determined depending on the path direction X in the furnace.
Ｔ−Ｘ曲線を加熱曲線と称する。The T-X curve is called a heating curve.
ここで、第１図に示す加熱曲線の推定に用いられた実操
業のデータ及び、物理定数と、推定結果を示す。Here, actual operation data, physical constants, and estimation results used for estimating the heating curve shown in FIG. 1 will be shown.
ここで、このパラメータは操業データに基いて計算の結
果求められたものである。Here, this parameter is calculated as a result of operation data.
炉の構造概要と、計算された加熱曲線は、第１図に対応
して示されている。The structural outline of the furnace and the calculated heating curve are shown correspondingly in FIG.
数値計算における刻み巾（（１）式におけるｄｘ）は４
．２ｍとし、刻み回数５０１としてルンゲ・フッタギル
法によって積分を行なった。The step width in numerical calculation (dx in equation (1)) is 4
．． 2 m and the number of increments was 501, and integration was performed by the Runge-Futtagill method.
尚ここでは、条帯材の温度計が炉出口にしか設置されて
いないものとして、加熱曲線の推定方法を述べたが、同
温度計を各制御帯域の出口に設置する場合は、各制御帯
域毎に上記方式を適用して、より高精度に加熱曲線を推
定する事ができる。Here, we have described the method for estimating the heating curve assuming that the strip material thermometer is installed only at the furnace outlet. However, if the same thermometer is installed at the outlet of each control zone, By applying the above method to each case, it is possible to estimate the heating curve with higher accuracy.
次に推定された加熱曲線第１図に基いて、制御帯域毎の
燃料消費量を求める計算方法を説明する。Next, a calculation method for determining the fuel consumption amount for each control zone will be explained based on the estimated heating curve in FIG.
燃料消費量の計算は、バーナ方式加熱炉について行い、
Ｔｚｉ にはＮＯ，ｉ制御帯域の雰囲気温度を採用し
、計算は以下の（２）式による。The fuel consumption is calculated for a burner type heating furnace.
The atmospheric temperature in the NO, i control zone is used for Tzi, and the calculation is based on the following equation (2).
（２）式は、単位時間当りの制御帯域毎のバーナ熱収支
を示したもので、左辺は時間当りのバーナの保持する熱
量の変化分を、右辺は、第１項はその制御帯域に於てバ
ーナから条帯材への熱伝達量を、第２項は消費燃料の発
熱量を、第３項は熱損失を示す。Equation (2) shows the burner heat balance for each control zone per unit time. The second term indicates the amount of heat transferred from the burner to the strip material, the second term indicates the calorific value of the consumed fuel, and the third term indicates the heat loss.
（２）式につき更に詳しく説明するに、右辺第１項のＴ
ｉはＮＯ，ｉ 制御帯域の条帯付温度の代表値で、具
体的には制御帯域入口、出口の条帯付温度の算術的平均
値を使用している。To explain equation (2) in more detail, the first term on the right side is T
NO,i is a representative value of the striped temperature of the control zone, and specifically, the arithmetic average value of the striped temperature at the entrance and exit of the control zone is used.
第２項ＨＯＯＧ は次式による。The second term HOOG is based on the following equation.
ＨＷＧは、ＴＺｉ、 Ｔｉ の関数として計算する
。HWG is calculated as a function of TZi, Ti.
（２）式におけるＱｂｏｓｓｉの求め方について説明す
るに、Ｔｚｉ が時間の経過に従って一定である場合
には、（２）式右辺はＯとなる。To explain how to obtain Qbossi in equation (2), if Tzi is constant over time, the right side of equation (2) becomes O.
右辺の第１項及び第２項は、上述の方法に従って操業中
の実際のデータ及び加熱曲線に基いて計算されるから、
その結果から第３項のＱｉ、ｏｓｓｉ を求める事が
できる。The first and second terms on the right side are calculated based on the actual data and heating curve during operation according to the method described above, so
From the results, the third term Qi and ossi can be obtained.
（３）式は、単位時間当りの制御帯毎の条帯材の熱収支
を示すもので、左辺は条帯材の熱収支を、右辺はバーナ
ーからの熱伝達量を表わす。Equation (3) shows the heat balance of the strip material for each control zone per unit time, where the left side represents the heat balance of the strip material, and the right side represents the amount of heat transfer from the burner.
左辺のＱＳＴ ｉ は先に求めた加熱曲線（第１図）
から計算できる。QST i on the left side is the heating curve obtained earlier (Fig. 1)
It can be calculated from
即ち、同加熱曲線上のＮＯ，ｉ 制御帯域の入口と出
口の条帯材の温度から、単位条帝材当りの吸熱量が求め
られる。That is, from the temperature of the strip material at the entrance and exit of the NO,i control zone on the same heating curve, the amount of heat absorbed per unit strip material is determined.
（２）、（３）式によって、ライン速度を変更する時の
、燃料流量を計算した結果について説明する。The results of calculating the fuel flow rate when changing the line speed using equations (2) and (3) will be explained.
加熱パターンは、先に示した形に固定したままで、（３
）式の左辺の■を変更する。While keeping the heating pattern fixed in the shape shown above,
) Change ■ on the left side of the equation.
■の変化に応じて、（３）式右辺のＴＺｉ が定まり、
これを（２）式に代入する事によってＶＯＯＧｉ即ちＮ
Ｏ，ｉ 制御帯域の燃料消費量が計算できる。According to the change in ■, TZi on the right side of equation (3) is determined,
By substituting this into equation (2), VOOGi, that is, N
O,i The fuel consumption in the control band can be calculated.
時間の経過に従って■を変化させていけば、これに応じ
て、その時刻に、予め定められた加熱パターンを維持す
るに必要であるＶＯＯＧｉが計算されを。If ■ is changed over time, the VOOGi required to maintain the predetermined heating pattern at that time will be calculated accordingly.
計算に便利なように式を整理すると、
（５Ｘ６）式に基いて以下のデータによって計算された
、ライン速度変更の時の、制御帯域毎の燃料流量の時間
的変化の様子を第２図に示す。Rearranging the equations for ease of calculation, Figure 2 shows the temporal changes in fuel flow rate for each control band when the line speed is changed, calculated using the following data based on equation (5X6). show.
加熱曲線 第１図に準じた。Heating curve: According to Figure 1.
そのためには、ＶＯＯＧｉを（６）式により第２図の如
く変化させるべきで、そうする事により結果として得ら
れた値の一例として１，３．７制御帯域について図に示
す。In order to do this, VOOGi should be changed as shown in FIG. 2 using equation (6), and the figure shows an example of the value obtained as a result for the 1.3.7 control band.
このように、１以上の制御帯域を有する連続熱処理炉に
おいて、炉出口の条帯材の温度を一定に保ち乍らライン
速度を変更する際、各制御帯域の雰囲気温度の時間に対
しての変化率、即ち、（５）式に示す関係と、当該各制
御帯域の燃料流量とライン速度変化率との関係、即ち、
（５）及び（６）式に示す関係とを基にして、ライン速
度■を変化させると同時に、各制御帯域の雰囲気温度を
任意の変化率で変化させるように、各制御帯域の燃料流
量を計算する事ができる。In this way, in a continuous heat treatment furnace having one or more control zones, when changing the line speed while keeping the temperature of the strip material at the furnace outlet constant, the change in the ambient temperature in each control zone with respect to time is rate, that is, the relationship shown in equation (5), and the relationship between the fuel flow rate and line speed change rate in each control zone, that is,
Based on the relationships shown in equations (5) and (6), the fuel flow rate in each control zone is adjusted so that the line speed ■ changes and the ambient temperature in each control zone changes at an arbitrary rate of change. I can calculate.
斯くして、速度加速中に必要な燃料の変化並に、速度が
安定してからの必要な燃料の供給量を求め得た。In this way, it was possible to determine the change in fuel required during speed acceleration as well as the amount of fuel needed to be supplied after the speed stabilized.
炉を、これに応じて制御するには、燃料供給量計算装置
、燃料供給量制御装置による。To control the furnace accordingly, a fuel supply amount calculation device and a fuel supply amount control device are used.
実施例を第３図によって説明する。An example will be explained with reference to FIG.
第３図に於て、２１は連続熱処理炉、２２はバーナ、２
３は条帯材とする。In Fig. 3, 21 is a continuous heat treatment furnace, 22 is a burner, 2
3 is a strip material.
１は炉の出口にある温度計でその出力信号は信号変換器
２により統一信号に変換され、燃料流量計算装置７に入
る。Reference numeral 1 denotes a thermometer at the outlet of the furnace, and its output signal is converted into a unified signal by a signal converter 2, and then input to a fuel flow rate calculation device 7.
３は速度発信装置で、その出力信号は信号変換器４によ
り統一信号に変換され、燃料流量計算装置７に入る。Reference numeral 3 denotes a speed transmitter, the output signal of which is converted into a unified signal by a signal converter 4 and input to a fuel flow rate calculation device 7.
燃料流量計算装置７は、以上の他に、条帯材についての
厚、巾、制御帯域パス長、ラヂアントチューブの熱容量
等の炉に固有なデータ及びステファンボルツマン定数等
の物理定数が入力口５より入力され、ライン速度設定値
が６から入力される。In addition to the above, the fuel flow rate calculation device 7 inputs furnace-specific data such as the thickness, width, control band path length, heat capacity of the radiant tube, etc. of the strip material, and physical constants such as the Stefan Boltzmann constant. The line speed setting value is input from 6.
計算装置７は次に示す機能を具備する。（ａ） ライ
ン速度Ｖが一定の場合（１）式より有効放射率ε及び、
加熱曲線Ｔ（ｘ）を示める。The computing device 7 has the following functions. (a) When the line speed V is constant, from equation (1), the effective emissivity ε and
The heating curve T(x) is shown.
（ｂ） ライン速度■が一定で、更に、制御帯域雰囲
気温度Ｔｚｉ が一定の場合に（２）式から制御帯域全
体のバーナ温度の熱損失ＱＬＯ８Ｓｉ を求める。(b) When the line speed ■ is constant and the control zone ambient temperature Tzi is constant, calculate the heat loss QLO8Si of the burner temperature in the entire control zone from equation (2).
（Ｃ） ライン速度■を変更する場合には、■の変更
量に基いて、制御帯域燃料流量■ｃＯＧｉ及び制御帯雰
囲気温度ＴＺｉ を求める。(C) When changing the line speed ■, determine the control zone fuel flow rate ■cOGi and the control zone ambient temperature TZi based on the amount of change in ■.
或はそのうちどちらかを求める。Or ask for one of them.
次に、これ等の計算値を、制御帯域雰囲気温度制御装置
８および燃料流量制御装置９に設定するための制御ロジ
ック回路について説明する。Next, a control logic circuit for setting these calculated values in the control zone atmospheric temperature control device 8 and the fuel flow rate control device 9 will be explained.
ここでは各装置８，９は比例積分（ＰＩＤ）演算を行う
一般の調節計とする。Here, each of the devices 8 and 9 is a general controller that performs a proportional integral (PID) calculation.
先にデータを示したライン速度を変更する場合には、制
御ロジック回路の接点１１．１２は、判定装置１３によ
り、第３図に図示の如き結線となる。When changing the line speed whose data was previously indicated, the contacts 11 and 12 of the control logic circuit are connected by the determination device 13 as shown in FIG.
燃料流量・制御帯域温度計算装置７からは（６）式に基
いて計算されたＶＯＯＧｉが出力され、接点１２を通し
て設定値が燃料制御装置９に与えられる。The fuel flow rate/control zone temperature calculation device 7 outputs VOOGi calculated based on equation (6), and the set value is given to the fuel control device 9 through the contact 12.
この時接点１１は制御帯域温度制御装置８の設定値を、
同８の制御量と等しく設定するように動く。At this time, the contact point 11 changes the set value of the control zone temperature control device 8,
It moves so that it is set equal to the control amount of 8.
これは設定値を制御量に追従させると同時に、制御装置
８の比例積分（ＰＩＤ）演算のうち積分（Ｉ）演算傾向
を停止させる意味をもつ。This has the meaning of causing the set value to follow the controlled variable and at the same time stopping the integral (I) computation tendency of the proportional integral (PID) computation of the control device 8.
即ち、制御装置８の機能を停止している間に、８の積分
演算を停止するのは、若し停止しないと、８の入力の偏
差が存在するため、積分演算機能によって、出力が飽和
してしまい、次に制御装置８を動かせようとする場合に
、この燃料流量出力が最大の状態から制御を行わなけれ
ばならない事となるが、積算演算の機能を停止させると
同時に設定値を制御量に追従させておけば、制御装置８
を動かせようとする時はその時点の燃料流量から連続し
て制御ができる好ましい事情による。That is, the reason why the integral calculation of 8 is stopped while the function of the control device 8 is stopped is because if it is not stopped, there will be a deviation in the input of 8, so the integral calculation function will cause the output to become saturated. The next time you try to operate the control device 8, you will have to perform control from the state where this fuel flow output is at its maximum.However, at the same time as stopping the integration calculation function, the set value is changed to the control amount. If the control device 8 follows
When attempting to operate the fuel flow rate, it is preferable to be able to continuously control the fuel flow rate at that time.
次にライン速度の変更が終了した場合は、制御ロジック
回路の接点１１および１２は図示とは異る黒の端子側に
設定される。Next, when the line speed change is completed, the contacts 11 and 12 of the control logic circuit are set to the black terminal side, which is different from the one shown.
この場合、計算装置７からは、（５）式に基いて計算さ
れたＴＺｉ が計算装置８に対して設定される。In this case, the calculation device 7 sets TZi calculated based on equation (5) to the calculation device 8.
燃料流量制御装置９の設定値は温度制御装置８の出力と
して設定される。The set value of the fuel flow control device 9 is set as the output of the temperature control device 8.
制御ロジック回路の切替およびライン速度設定値６から
のライン速度変更指令は、作業員の指令によってｈう事
も、自動的に行う事も可能である。The switching of the control logic circuit and the command to change the line speed from the line speed setting value 6 can be performed by an operator's command or can be performed automatically.
例へば次の操作が考へられる。For example, consider the following operations.
即ち、ライン速度の最終の目標値が計算装置７へ、６か
ら与えられた時点で、制御ロジックの切替が行わる。That is, when the final target value of the line speed is given to the calculation device 7 from the calculation device 6, the control logic is switched.
一方ライン速度変更は一定の変更速度で徐々に行なわれ
最終の目標値に達した時点で、再び制御ロジック回路の
切替が行われる。On the other hand, the line speed is changed gradually at a constant speed, and when the final target value is reached, the control logic circuit is switched again.
尚何れの場合にもライン速度の変更速度は次の（７式の
制限をうける。In either case, the speed at which the line speed is changed is subject to the following (7) restrictions.
尚第２図に示した例に於ては、第１図の加熱曲線を固定
し、更にライン速度の変更速度は一定としたが、（７）
式の制限を満し、尚かつ、ライン速度の変更所要時間を
最小とするように、加熱曲線及びライン速度の変更速度
、或はその内の何れかを調節する方式にも上式への考慮
が必要である。In the example shown in Fig. 2, the heating curve shown in Fig. 1 was fixed, and the line speed change speed was kept constant, but (7)
Consideration of the above equation also applies to methods of adjusting the heating curve and/or the line speed change rate so as to satisfy the limits of the equation and minimize the time required to change the line speed. is necessary.
ライン速度の変更速度は前述の如く一定とせず、制御の
終末に於てその加速度の傾斜角を水平に近くする事によ
り制御に若干の余裕をもたせる方が好ましい。It is preferable that the rate of change of the line speed is not constant as described above, but that the angle of inclination of the acceleration is made close to horizontal at the end of the control to provide some leeway in the control.
叙上の様に、計算装置７により燃料流量並に雰囲気温度
を求め、それにより燃料流量並に雰囲気温度を夫々の制
御装置によって制御する事により所望の温度制御を達成
する事ができる。As described above, desired temperature control can be achieved by determining the fuel flow rate and ambient temperature using the calculation device 7, and controlling the fuel flow rate and ambient temperature using the respective control devices.
本発明の方法と装置によると、ライン速度の急速な変更
にもかかわらず、条帯材の炉出口温度を一定に保ち鉄材
を過熱する事なく、速度調整不良による不良品質の発生
を防除できて、歩留り向上に大きく寄与する事ができる
。According to the method and apparatus of the present invention, despite rapid changes in line speed, the furnace exit temperature of the strip material can be kept constant without overheating the iron material, and the occurrence of defective quality due to poor speed adjustment can be prevented. , can greatly contribute to improving yield.
本技術は、叙上のバーナによる直接加熱にかぎらず、ガ
スや油等の流体燃料のみでなく、電気等各種エネルギー
による炉についても実施可能である。The present technology is applicable not only to direct heating using the burner described above, but also to furnaces using various types of energy such as electricity as well as fluid fuels such as gas and oil.
更に本技術の範中であれば、フィードバック情報による
フィードバック制御に、これを併用してもよい。Further, within the scope of the present technology, this may be used in conjunction with feedback control based on feedback information.
第１図は制御帯域各パス長位置における雰囲気温度の関
係を示す加熱曲線、第２図は定変速度中における燃料流
量を示す関係図、第３図は本発明の装置の図。
２１・・・・・・連続熱処理炉、２２・・・・・・バー
ナ、２３・・・・・・条帯材、１・・・・・・温度計、
２，４・・・・・・信号変換器、３・・・・・・速度発
信器、５・・・・・・前提条件設定器、６・・・・・・
ライン速度設定器、７・・・・・・燃料流量・制御帯域
温度計算装置、８・・・・・・制御帯域温度制御装置、
９・・・・・・燃料流量制御装置、１１．１２・・・・
・・接点、１３・・・・・・判定装置。FIG. 1 is a heating curve showing the relationship between the ambient temperature at each path length position in the control band, FIG. 2 is a relational diagram showing the fuel flow rate during constant variable speed, and FIG. 3 is a diagram of the apparatus of the present invention. 21... Continuous heat treatment furnace, 22... Burner, 23... Strip material, 1... Thermometer,
2, 4...Signal converter, 3...Speed transmitter, 5...Precondition setting device, 6...
Line speed setting device, 7...Fuel flow rate/control zone temperature calculation device, 8...Control zone temperature control device,
9...Fuel flow rate control device, 11.12...
...Contact point, 13... Determination device.
Claims (1)
出口の条帯材の温度を一定に保ちながらライン速度を変
更する際、各ｆｔｊｌ）ｆＭ］帯域の雰囲気温度の時間
に対しての変化率と、当該各制御帯域の燃料流量とライ
ン速度変化率との関係を基にして、ライン速度を変化さ
せると同時に、各制御帯域の雰囲気温度を任意の変化率
で変化させるように、各制御帯域の燃料流量を制御する
各帯材連続熱処理炉の温度制御方法。 ２１以上の制御帯域を有する連続熱処理炉において、炉
出口の条帯材の温度を一定に保ちながらライン速度を変
更するための炉温度制御装置が、炉出口の条帯材の温度
を検出する温度計と；条帯材のライン速度を検出するラ
イン速度計と；温度計及びライン速度計の入力を受けて
燃料流量を計算する燃料流量・制御帯域温度計算装置と
；該燃料流量・制御帯域温度計算装置に接点を介して連
設し、定常状態における温度制御を行なう制御帯域温度
制御装置と；燃料流量・制御帯域温度計算装置及び制御
帯域温度制御装置と接点を介して連設し、燃料流量を制
御する燃料流量制御装置とよりなる条帯材連続熱処理炉
の温度制御装置。[Claims] In a continuous heat treatment furnace having 11 or more control zones, when changing the line speed while keeping the temperature of the strip material at the furnace outlet constant, Based on the relationship between the fuel flow rate and line speed change rate for each control zone, the line speed can be changed and the ambient temperature in each control zone can be changed at an arbitrary rate of change at the same time. and a temperature control method for each strip continuous heat treatment furnace that controls the fuel flow rate in each control zone. In a continuous heat treatment furnace having 21 or more control zones, the temperature at which the furnace temperature control device changes the line speed while keeping the temperature of the strip material at the furnace outlet constant detects the temperature of the strip material at the furnace outlet. a line speed meter that detects the line speed of the strip material; a fuel flow rate/control zone temperature calculation device that calculates the fuel flow rate in response to input from the thermometer and the line speed meter; and the fuel flow rate/control zone temperature. A control zone temperature control device that is connected to the calculation device via contacts and performs temperature control in a steady state; A control zone temperature control device that is connected to the fuel flow rate/control zone temperature calculation device and the control zone temperature control device via contacts, and controls the fuel flow rate. Temperature control device for a continuous strip heat treatment furnace consisting of a fuel flow rate control device and a fuel flow rate control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9459777A JPS5831373B2 (en) | 1977-08-09 | 1977-08-09 | Temperature control method and device for continuous strip heat treatment furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9459777A JPS5831373B2 (en) | 1977-08-09 | 1977-08-09 | Temperature control method and device for continuous strip heat treatment furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5428713A JPS5428713A (en) | 1979-03-03 |
| JPS5831373B2 true JPS5831373B2 (en) | 1983-07-05 |
Family
ID=14114672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9459777A Expired JPS5831373B2 (en) | 1977-08-09 | 1977-08-09 | Temperature control method and device for continuous strip heat treatment furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5831373B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5664220A (en) * | 1979-10-29 | 1981-06-01 | Nippon Steel Corp | Amount of heat distributing system in combustion furnace |
| JPS5861233A (en) * | 1981-10-08 | 1983-04-12 | Nippon Steel Corp | Controlling method for temperature of plate |
| JPS5897240A (en) * | 1981-12-07 | 1983-06-09 | Nippon Hoso Kyokai <Nhk> | Gas discharge indicator |
| JPS58163129A (en) * | 1982-03-23 | 1983-09-27 | Nec Corp | Plasma display panel |
-
1977
- 1977-08-09 JP JP9459777A patent/JPS5831373B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5428713A (en) | 1979-03-03 |
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