JPS58169213A - Control system of preheater - Google Patents
Control system of preheaterInfo
- Publication number
- JPS58169213A JPS58169213A JP57051324A JP5132482A JPS58169213A JP S58169213 A JPS58169213 A JP S58169213A JP 57051324 A JP57051324 A JP 57051324A JP 5132482 A JP5132482 A JP 5132482A JP S58169213 A JPS58169213 A JP S58169213A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- controller
- control device
- preheating
- piping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/22—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element being a thermocouple
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1927—Control of temperature characterised by the use of electric means using a plurality of sensors
- G05D23/193—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces
- G05D23/1932—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces to control the temperature of a plurality of spaces
- G05D23/1934—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces to control the temperature of a plurality of spaces each space being provided with one sensor acting on one or more control means
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Remote Sensing (AREA)
- Control Of Resistance Heating (AREA)
- Safety Devices In Control Systems (AREA)
- Control Of Temperature (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は 多数の温度制御点を有し、多数の制御点を少
数の制御装置で集約的に制御する予熱ヒータ制御システ
ムに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a preheater control system that has a large number of temperature control points and centrally controls the large number of control points using a small number of control devices.
従来の予熱とｍ−制御システムは、温度検出器、温度制
御！Ｉｌｌの故障が生じた場合、設備として安全な方向
となる様に、コンタクタＯＮまたはＯＦＦのいづれかの
状態を維持させていた。しかし、この様な処置では、配
管、機器の温度は飽和温度に達するか、または、雰囲気
温度となるかのいずれかでどの程度の温度となるか不明
であり、一定温度範囲を維持することは出来ない。Conventional preheating and m-control system, temperature sensor, temperature control! In the event of a failure of Ill, the contactor was kept either ON or OFF so that the equipment would be in a safe direction. However, with this kind of treatment, it is unclear whether the temperature of the piping and equipment will reach the saturation temperature or the ambient temperature, and it is impossible to maintain a constant temperature range. Can not.
本発明の目的は、同種多量の信号処理を施こす情報集約
型信号処理装置（マイクロコンピュータ等）を用いた温
度制御装置において、正常な制御機能が失なわれた場合
のバックアップ機能を有した予熱ヒータ制御システムを
提供することにある。An object of the present invention is to provide a temperature control device that uses an information-intensive signal processing device (microcomputer, etc.) that performs a large amount of signal processing of the same kind, and has a preheating function that has a backup function in case the normal control function is lost. An object of the present invention is to provide a heater control system.
温度は、ヒーターよる入力熱量、配管、機器の保温材に
よる保温能力及び、配管、機器内のプロセス流体の状態
により決定されるうヒータによる入力熱量、配管、機器
の保温材の保湿能力は設備建設後は、一定である。また
、プロセス流体の状ＩＩけ、設備の運転モードにより規
定することができるつゆえに、設備の運転モードにより
、温度制御のパターンを評価することが出来る。Temperature is determined by the amount of heat input by the heater, the heat retention capacity of the piping and equipment's insulation materials, and the state of the process fluid inside the piping and equipment. The rest is constant. Furthermore, since the condition of the process fluid can be defined by the operating mode of the equipment, the temperature control pattern can be evaluated based on the operating mode of the equipment.
以下に本発明の実施例とその効果をＩＩ１図に基づき説
明する。Embodiments of the present invention and their effects will be described below with reference to FIG. II1.
本実施例は、予熱を行う複数のヒータ２゛と予熱される
配管１、配管ｌの予熱温度を測定する複数の温度検出器
３、導熱温度と目標設定値との比較によりコンタクタ４
に対し０Ｎ−ＯＦＦ指令を発する温度制御装置５、温度
制御機能が失なわれた場合にコンタクタ４ＫＯＮ−ＯＦ
Ｆ信号を発する補助制御装置７、温度制御装置５と補助
制御装置７、操作信号のいづれかを選択するモード切換
装置８、モード切換装置８により選択された０Ｎ−ＯＦ
Ｆ信号に従かいヒータへの給電を断続するコンタクタ４
を含んだ接触器盤６より構成される。This embodiment includes a plurality of heaters 2 for preheating, a pipe 1 to be preheated, a plurality of temperature detectors 3 for measuring the preheating temperature of the pipe 1, and a contactor 4 by comparing the heat conduction temperature with a target set value.
The temperature control device 5 issues an 0N-OFF command to the contactor 4KON-OF when the temperature control function is lost.
Auxiliary control device 7 that emits the F signal, temperature control device 5 and auxiliary control device 7, mode switching device 8 that selects one of the operation signals, 0N-OF selected by mode switching device 8
Contactor 4 that intermits power supply to the heater according to the F signal
It is composed of a contactor board 6 including a contactor board 6.
本制御システムは、配管ｌの予熱温度を一定温度範囲内
に維持することを目的とする。The purpose of this control system is to maintain the preheating temperature of the pipe 1 within a certain temperature range.
予熱温度は、温度検出器３にて測定し、温度制御装置５
に入力される。The preheating temperature is measured by the temperature detector 3, and the temperature controller 5
is input.
温度制御装置５け、予熱温度に応じてコンタクタ４を０
Ｎ−ＯＦＦする様に操作信号を出力する。Temperature control device 5, contactor 4 is set to 0 according to the preheating temperature.
Outputs an operation signal to turn N-OFF.
第２図に予熱温度、温度制御装置５出力、コンタクタ４
の関係を示す。Figure 2 shows the preheating temperature, temperature control device 5 output, and contactor 4.
shows the relationship between
温度制御装置５は、予熱温度が制御設定値”低”よ抄下
がるとコンタクタ４をＯＮする様に、予熱温度が制御設
定値”高”を越えるとコンタクタ４をＯＦＦする様な０
Ｎ−ＯＦＦＩｔ制御を行う。The temperature control device 5 is configured to turn on the contactor 4 when the preheating temperature falls below the control set value "low", and to turn off the contactor 4 when the preheating temperature exceeds the control set value "high".
Performs N-OFFIt control.
コンタクタ４は、温度制御装置５の出力に応じて”開”
、′閉”を行い、ヒータ２への給電の制御を行う。The contactor 4 is "open" according to the output of the temperature control device 5.
, 'close' and control the power supply to the heater 2.
温度制御装置５において、温度検出器３断線、および温
度制御装置５故障の場合は、正常な制御機能が失なわれ
ることとなる。しかし、この様な事象が生じた場合は、
モード切換装置８にて温度制御装置５出力信号選択の制
御モードから補助制御装置７の信号が選択される制御モ
ードに切換える。In the temperature control device 5, if the temperature detector 3 is disconnected or the temperature control device 5 is out of order, the normal control function will be lost. However, if such an event occurs,
The mode switching device 8 switches from the control mode in which the temperature control device 5 output signal is selected to the control mode in which the signal from the auxiliary control device 7 is selected.
補助制御装置７は、設備の運転モード信号を入力し、運
転モードに対応した平均０Ｎ−ＯＦＦノ（ターンを操作
信号として出力する。The auxiliary control device 7 inputs the operation mode signal of the equipment and outputs an average ON-OFF turn corresponding to the operation mode as an operation signal.
平均０Ｎ−ＯＦＦパターンを第３図に示す。The average ON-OFF pattern is shown in FIG.
補助制御装置７は温度検出器３、温度制御装置５の正常
時において、運転モード信号、温度制御装置５出力信号
を入力し、温度制御装置５出力ＯＮ、ＯＦＦ時間の平均
時間電０１ｍ ’０１１ を計算し、平均０Ｎ−ＯＦ
Ｆパターンを作成する。When the temperature detector 3 and the temperature control device 5 are in normal condition, the auxiliary control device 7 inputs the operation mode signal and the temperature control device 5 output signal, and calculates the average time of the temperature control device 5 output ON and OFF time. Calculate and average 0N-OF
Create F pattern.
平均出力ＯＮ時間１ｔｏｌｌ
平均出力ＯＦＦ時間； ”（ＩＦＷ
平均パターンによる温度制御により配管ｌは、温度制御
装置５における温度制御時と同量め熱入力をヒータ２か
ら得ることとなり、温度検出器３、温度制御７ＩＪｍ置
５故障においても、目標温度範囲内に温度が維持される
。Average output ON time: 1 toll Average output OFF time; Even in the event of temperature control failure, the temperature is maintained within the target temperature range.
本発明によれば、温度検出器、温度制御装置の故障が生
じても、正常な制御動作を行っている時と同量の熱入力
を配管、機器に与えることが出来るので、配管、機器の
温度を所定の目標値の範囲に保つ事が可能となる。According to the present invention, even if a failure occurs in the temperature sensor or temperature control device, the same amount of heat input as when normal control operation is performed can be applied to the piping and equipment. It becomes possible to maintain the temperature within a predetermined target value range.
第１図は、本発明の一実施例である予熱ヒータ制御シス
テムの構成ブロック図、第２図は、本発明の一実施例の
通常時の制御状態図、′ｍ３図は、本発明の一実施例に
おける補助制御装置の平均〕くターン出力説明図を示す
。
１−・・配管、２・・・ヒータ、３・・・温度検出器、
４・・・コンタクタ、５・・・温度制御装置、６・・・
接触器盤、７Ｊｌ！１ 目
６ θ
第２図FIG. 1 is a configuration block diagram of a preheating heater control system that is an embodiment of the present invention, FIG. 2 is a normal control state diagram of an embodiment of the present invention, and FIG. An explanatory diagram of the average turn output of the auxiliary control device in the embodiment is shown. 1-... Piping, 2... Heater, 3... Temperature detector,
4... Contactor, 5... Temperature control device, 6...
Contactor board, 7Jl! 1st 6 θ Fig. 2
Claims (1)
定する温度検出器複数個、予熱温度により配管、機器の
温度を一定温度範囲内に維持する様に作動する温度制御
装置、温度制御装置からの出力信号によりヒータへの給
電状態を操作する制御器よりなる予熱温度制御システム
において、温度検出器、温度制御装置の故障による制御
機能喪失時に、正常時における温度制御装置の平均的な
温度制御パターンに従り九温度制御信号を出方する補助
制御装置と、制御モードを温度制御装置から補助制御装
置に切換るモード切換装置を設けたバックアップシステ
ムを有することを特徴とした予熱ヒータ制御システム。1. Multiple heaters to preheat piping and equipment, multiple temperature detectors to measure preheating temperature, temperature control device that operates to maintain the temperature of piping and equipment within a certain temperature range depending on the preheating temperature, temperature control device In a preheating temperature control system consisting of a controller that operates the power supply state to the heater using an output signal from A preheating heater control system characterized by having a backup system provided with an auxiliary control device that outputs nine temperature control signals according to a pattern, and a mode switching device that switches the control mode from the temperature control device to the auxiliary control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57051324A JPS58169213A (en) | 1982-03-31 | 1982-03-31 | Control system of preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57051324A JPS58169213A (en) | 1982-03-31 | 1982-03-31 | Control system of preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58169213A true JPS58169213A (en) | 1983-10-05 |
Family
ID=12883733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57051324A Pending JPS58169213A (en) | 1982-03-31 | 1982-03-31 | Control system of preheater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58169213A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01194010A (en) * | 1988-01-29 | 1989-08-04 | Nec Corp | Optical module protection circuit |
| JP2020038041A (en) * | 2018-09-05 | 2020-03-12 | 三浦工業株式会社 | Steam superheating device and steam superheating system |
-
1982
- 1982-03-31 JP JP57051324A patent/JPS58169213A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01194010A (en) * | 1988-01-29 | 1989-08-04 | Nec Corp | Optical module protection circuit |
| JP2020038041A (en) * | 2018-09-05 | 2020-03-12 | 三浦工業株式会社 | Steam superheating device and steam superheating system |
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