JPH0666411A - Double instrumentation detection circuit for steam temperature at outlet of superheater of boiler - Google Patents
Double instrumentation detection circuit for steam temperature at outlet of superheater of boilerInfo
- Publication number
- JPH0666411A JPH0666411A JP4220295A JP22029592A JPH0666411A JP H0666411 A JPH0666411 A JP H0666411A JP 4220295 A JP4220295 A JP 4220295A JP 22029592 A JP22029592 A JP 22029592A JP H0666411 A JPH0666411 A JP H0666411A
- Authority
- JP
- Japan
- Prior art keywords
- boiler
- deviation
- circuit
- pressure
- superheater
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、プラント制御装置、特
にボイラの過熱器出口蒸気温度の二重計装検出回路に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant control device, and more particularly to a dual instrumentation detection circuit for the steam temperature at the outlet of a superheater of a boiler.
【０００２】[0002]
【従来の技術】最近の発電プラントには１０００ＭＷ級
の大容量のものがあり、その蒸気ボイラの水・蒸気系に
は１次，２次，３次の過熱器が設けられる。例えば重油
用の変圧貫流ボイラにおいて、その水・蒸気系に再循環
系を備え、気水分離器及び分離タンクで分離されたドレ
ンをボイラ再循環ポンプにより節炭器入口に再循環さ
せ、低負荷時に火炉パス保護に必要な給水流量を確保す
る一方、ボイラ本体から出た蒸気を１次，２次，３次の
過熱器に通し、高圧タービン入口蒸気温度を５３８℃に
保つといったことが行われる。2. Description of the Related Art A recent power plant has a large capacity of 1000 MW class, and its steam / water system has primary, secondary, and tertiary superheaters. For example, in a once-through boiler for heavy oil, the water / steam system is equipped with a recirculation system, and the drain separated by the steam separator and separation tank is recirculated to the inlet of the economizer by a boiler recirculation pump to reduce the load. At the same time, while ensuring the feed water flow rate necessary for protection of the furnace path, the steam discharged from the boiler main body is passed through the primary, secondary, and tertiary superheaters to maintain the high-pressure turbine inlet steam temperature at 538 ° C. .
【０００３】図２はこの３次過熱器ａの前後を示したも
ので、左右一系統ずつの主蒸気管（タービン主蒸気管）
ｂ，ｃには、それぞれ３０cm程離して温度測定器（発信
器）ＴＥ１，ＴＥ２，ＴＥ３，ＴＥ４が設けられ、それ
ぞれの箇所の温度を測定できるようになっている。一系
統のタービン主蒸気管に、それぞれ温度測定器を一対ず
つ設けるのは、温度測定の冗長化を図るためであると共
に、両者の間には正常時には偏差がなく、もし所定許容
範囲以上の偏差があったときは“二重化偏差大”と称す
る偏差警報を出力させて、当該測定器の故障又は接続ラ
インの断線であると判断できるようにするためである。FIG. 2 shows the front and rear of the tertiary superheater a, and a main steam pipe (turbine main steam pipe) for each of the left and right systems.
Temperature measuring devices (oscillators) TE1, TE2, TE3, TE4 are provided at b and c, respectively, separated from each other by about 30 cm so that the temperature at each position can be measured. A pair of temperature measuring instruments is provided in each turbine main steam pipe for the purpose of making the temperature measurement redundant, and there is no deviation between the two when normal, and if there is a deviation of more than the predetermined allowable range. If there is, a deviation alarm called "large duplication deviation" is output so that it can be determined that the measuring instrument is broken or the connection line is broken.
【０００４】[0004]
【発明が解決しようとする課題】しかし、ボイラの起動
時、例えば長期間ボイラを停止した後のボイラ起動時に
おいては、温度測定器の故障や接続ラインの断線といっ
た機器異常は何等存在しないにも拘らず、２８℃もの偏
差が生じて上記二重化偏差大の偏差警報が出てしまい、
運転保守員がその対応に追われることがあった。種々の
検討をした結果、上記誤動作の原因は、起動時に発生す
るドレンの影響、つまり起動時において曲りくねった主
蒸気管のどこかにドレンが溜っていて一時的に流入する
ためであることが判った。However, at the time of starting the boiler, for example, when starting the boiler after stopping the boiler for a long period of time, there is no equipment abnormality such as a failure of the temperature measuring device or disconnection of the connection line. Regardless, a deviation of 28 degrees Celsius occurred and the deviation warning of the above-mentioned duplication deviation was issued,
The operation and maintenance staff were sometimes chased by the response. As a result of various studies, the cause of the above malfunction is that the drain is generated at the time of startup, that is, the drain is temporarily accumulated somewhere in the meandering main steam pipe at the time of startup. understood.
【０００５】本発明は、このような事情を考慮してなさ
れたものであり、その目的は、測定器の故障や接続ライ
ンの断線等に起因する場合とそれ以外に起因する場合と
を区別し、ボイラの起動時においてドレンの影響による
偏差警報が出ないようにしたボイラの過熱器出口蒸気温
度二重計装検出回路を提供することにある。The present invention has been made in consideration of such circumstances, and an object thereof is to distinguish a case due to a failure of a measuring instrument or a disconnection of a connection line from a case other than that. It is an object of the present invention to provide a boiler superheater outlet steam temperature double instrumentation detection circuit in which a deviation alarm due to the influence of drain is not issued when the boiler is started.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記目的を達
成するため、ボイラの過熱器からの二系統の主蒸気管の
各々に流下方向に離して温度測定器を一対ずつ設け、使
用中の主蒸気管に属する両温度測定器の出力偏差が大き
いときに偏差検出信号を出力させ、これを偏差警報とし
て温度制御回路に与えるように構成した二重計装検出回
路において、使用中の主蒸気管に属する圧力測定器によ
る計測圧力が、ボイラ起動時のホットクリーンナップ終
了後の圧力上昇過程の規定値を越えるまで、上記偏差検
出信号を禁止する条件回路を設け、上記規定値をドレン
の一時的流入により偏差検出信号の発生する圧力値より
高い値に定めた構成のものである。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a pair of temperature measuring devices, one in each of the two main steam pipes from a superheater of a boiler, which are separated from each other in the downflow direction and is in use. In the dual instrumentation detection circuit configured to output the deviation detection signal when the output deviation of both temperature measuring instruments belonging to the main steam pipe is large and to give this as a deviation alarm to the temperature control circuit, A condition circuit that prohibits the above deviation detection signal is provided until the pressure measured by the pressure measuring instrument belonging to the steam pipe exceeds the specified value of the pressure rising process after the hot cleanup at the time of boiler startup. The pressure is set to a value higher than the pressure value generated by the deviation detection signal due to the static inflow.
【０００７】[0007]
【作用】本発明は、ボイラ起動時において温度測定器の
故障や接続ラインの断線といった機器異常は何等存在し
ないにも拘らず、二重計装検出回路から二重化偏差大の
偏差検出信号が出てしまう要因が、主蒸気管のどこかに
溜っていたドレンの一時的流入によるためであるという
認識から出発している。また、この現象が生じる点は、
使用中の主蒸気管の圧力が、ボイラ起動時のホットクリ
ーンナップ終了後の圧力上昇過程における或る値（例え
ば圧力２０Ｋ）に至ったときである。According to the present invention, even if there is no equipment abnormality such as a failure of the temperature measuring instrument or a disconnection of the connection line at the time of starting the boiler, the dual instrumentation detection circuit outputs a deviation detection signal with a large duplication deviation. It started from the recognition that the cause of this is the temporary inflow of drain that had accumulated somewhere in the main steam pipe. In addition, the point where this phenomenon occurs is
This is when the pressure of the main steam pipe in use reaches a certain value (for example, a pressure of 20K) in the pressure increasing process after the hot cleanup at the time of starting the boiler.
【０００８】そこで、本発明では、上記偏差検出信号を
禁止する条件回路を設け、主蒸気管の圧力がこの偏差検
出信号の発生する規定値（例えば圧力２５Ｋ）を越える
まで、二重計装検出回路からの出力を禁止し、その間に
偏差検出信号が発生されたとしても、これが二重化偏差
大の偏差警報として温度制御回路に与えられないように
阻止する。また、圧力が上記規定値以上になった後は、
通常通り温度測定器の故障や接続ラインの断線等によ
り、二重化偏差大の偏差警報が温度制御回路に与えられ
る。Therefore, in the present invention, a condition circuit for prohibiting the deviation detection signal is provided, and double instrumentation detection is performed until the pressure in the main steam pipe exceeds a specified value (for example, pressure 25K) generated by the deviation detection signal. The output from the circuit is prohibited, and even if a deviation detection signal is generated during that time, this is prevented from being given to the temperature control circuit as a deviation alarm of a large duplication deviation. Also, after the pressure exceeds the specified value,
As usual, due to a failure of the temperature measuring device or disconnection of the connection line, a deviation alarm with a large duplication deviation is given to the temperature control circuit.
【０００９】これにより、ボイラは、そのホットクリー
ンナップ終了後の圧力上昇過程においては、警報により
運転保守員を惑わすことなく、正常に温度制御されるこ
とになる。As a result, the temperature of the boiler is normally controlled in the process of increasing the pressure after the hot cleanup, without disturbing the operation and maintenance staff by an alarm.
【００１０】[0010]
【実施例】以下、本発明の一実施例を添付図面に基づい
て説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.
【００１１】図１に示すボイラの過熱器出口蒸気温度二
重計装検出回路は、図２で説明したように、ボイラの３
次過熱器ａからの二重化主蒸気管ｂ，ｃの各々に一対ず
つ設けた温度測定器ＴＥ１，ＴＥ２又はＴＥ３，ＴＥ４
を有し、使用中の主蒸気管ｂに属する両温度測定器ＴＥ
１，ＴＥ２の出力偏差が大きいときに偏差検出信号６を
出力させ、これを偏差警報として温度制御回路４に与え
る構成を前提としている。As shown in FIG. 2, the boiler superheater outlet steam temperature double instrumentation detection circuit shown in FIG.
A pair of temperature measuring devices TE1, TE2 or TE3, TE4 provided in each of the dual main steam pipes b, c from the next superheater a
And both temperature measuring devices TE having a main steam pipe b in use
It is assumed that the deviation detection signal 6 is output when the output deviation of 1 and TE2 is large and the deviation detection signal 6 is given to the temperature control circuit 4 as a deviation alarm.
【００１２】３次過熱器ａからの主蒸気管ｂにそれぞれ
３０cm程離して設けた温度測定器ＴＥ１，ＴＥ２の出力
は、変換器１，２により信号変換された後、切替器３に
より、いずれかの測定信号が選択されて、スプレー弁及
び燃料流量弁の温度制御回路４の入力として使用され
る。また、両変換器１，２の出力は、シグナルモニタ５
に入力され、両者の間に所定許容範囲以上の偏差があっ
たとき、シグナルモニタ５から“二重化偏差大”の偏差
検出信号６が出力されるようになっている。この偏差検
出信号６はＡＮＤ回路７の一方の入力として加えられて
おり、このＡＮＤ回路７及び二重化計装インタロック入
切スイッチ８を通し、警報信号９として温度制御回路４
に入力されるようになっている。The outputs of the temperature measuring devices TE1 and TE2, which are provided at a distance of about 30 cm from the main steam pipe b from the tertiary superheater a, are converted into signals by the converters 1 and 2 and then by the switching device 3. One of the measurement signals is selected and used as an input to the temperature control circuit 4 of the spray valve and the fuel flow valve. The outputs of both converters 1 and 2 are the signal monitor 5
When there is a deviation exceeding a predetermined allowable range between them, the signal monitor 5 outputs a deviation detection signal 6 of "large duplication deviation". The deviation detection signal 6 is applied as one input of the AND circuit 7, and is passed through the AND circuit 7 and the duplicated instrumentation interlock ON / OFF switch 8 to output the alarm signal 9 as the temperature control circuit 4
It is designed to be input to.
【００１３】上記ＡＮＤ回路７の他方の入力端子には、
ＯＲ回路１３を通し、二安定回路１０のセット出力信号
１１とバーナ弁全数閉の信号１２とが入力されている。At the other input terminal of the AND circuit 7,
Through the OR circuit 13, the set output signal 11 of the bistable circuit 10 and the burner valve total closing signal 12 are input.
【００１４】この二安定回路１０は、主蒸気管ｂに設け
た圧力測定器ＰＸ１（又はＰＸ２）により検出される圧
力ＴＰが、ボイラ起動時のホットクリーンナップ終了後
の圧力上昇過程における第１規定値Ａを越えたときにセ
ットされ、また同圧力ＴＰが上記第１規定値Ａより低い
圧力値の第２規定値Ｂ未満まで降下したときにリセット
されるようになっている。そして、この二安定回路１０
のセット出力信号１１及びバーナ弁全数閉の信号１２
は、ＯＲ回路１３を通して、上記偏差検出信号６のライ
ン途中に設けたＡＮＤ回路７の一方の入力となってい
る。In the bistable circuit 10, the pressure TP detected by the pressure measuring instrument PX1 (or PX2) provided in the main steam pipe b is the first specified value in the pressure increasing process after the hot cleanup at the time of starting the boiler. It is set when A is exceeded, and is reset when the pressure TP drops below a second prescribed value B which is a pressure value lower than the first prescribed value A. And this bistable circuit 10
Set output signal 11 and burner valve fully closed signal 12
Is one input of an AND circuit 7 provided in the middle of the line of the deviation detection signal 6 through the OR circuit 13.
【００１５】この実施例では、圧力ＴＰの第１規定値Ａ
は２５Ｋに、第２規定値Ｂは２０Ｋに設定してあり、圧
力ＴＰがこの第１規定値Ａの２５Ｋを超過（ＴＰ＞２５
Ｋ）したときに二安定回路１０がセットされ、同圧力Ｔ
Ｐが第２規定値Ｂの２０Ｋ未満（ＴＰ＜２０Ｋ）となっ
たときにリセットされるように定めてある。従って、二
安定回路１０はセット優先になっており、例えば圧力Ｔ
Ｐが０Ｋから２５Ｋを越えるまで上昇されると初めてセ
ット出力信号１１を出力し、逆に圧力ＴＰが２５Ｋから
下って来て２０Ｋ未満になると初めてリセットされる。In this embodiment, the first specified value A of the pressure TP is
Is set to 25K and the second specified value B is set to 20K, and the pressure TP exceeds the first specified value A of 25K (TP> 25).
K), the bistable circuit 10 is set and the same pressure T
It is set to be reset when P becomes less than 20K of the second specified value B (TP <20K). Therefore, the bistable circuit 10 has the set priority, and for example, the pressure T
The set output signal 11 is output only when P is increased from 0K to over 25K, and conversely, it is reset when the pressure TP falls from 25K to less than 20K.
【００１６】このように第１規定値ＡをＴＰ＝２５Ｋの
点に定めたのは、６００ＭＷ級の実機運転の結果に基づ
くものである。即ち、ボイラを立上げて行く途中でどこ
かに溜っていたドレンの一時的流入に起因して２８℃も
の偏差が生じ、シグナルモニタ５から“二重化偏差大”
の偏差検出信号６が出力されたのが、ホットクリーンナ
ップ（温度２００℃，圧力１５Ｋ程度）が終了した後の
圧力上昇過程における圧力値がＴＰ＝２５Ｋの時点であ
ったことによる。また規定値ＢをＴＰ＝２０Ｋの点に定
めたのは、ヒステリシス特性を持たせてチャタリングを
防止するためである。The reason why the first prescribed value A is set at the point of TP = 25K is based on the result of the actual operation of 600 MW class. That is, a deviation of as much as 28 ° C occurs due to the temporary inflow of drain that has accumulated somewhere during the startup of the boiler, and the signal monitor 5 gives a "large duplication deviation".
The deviation detection signal 6 is output because the pressure value in the pressure increasing process after the hot cleanup (temperature 200 ° C., pressure about 15K) was TP = 25K. Further, the reason why the prescribed value B is set at the point of TP = 20K is to provide a hysteresis characteristic and prevent chattering.
【００１７】次に動作について説明する。Next, the operation will be described.
【００１８】まず、ＯＲ回路１３のバーナ弁全数閉の信
号１２（条件）が成立していてＡＮＤ回路７に加えられ
ている場合から説明する。First, the case where the signal 12 (condition) for closing all burner valves of the OR circuit 13 is satisfied and is applied to the AND circuit 7 will be described.
【００１９】かかる回路構成の場合、ボイラ圧力状態に
関係なくバーナ弁全数閉信号１２が成立していることか
らボイラ停止時における温度測定器の故障又は接続ライ
ンの断線等に起因する異常を検出し、警報信号９を発生
させる。ここでバーナ弁全閉とボイラ停止時とは同一状
態を示す。In the case of such a circuit configuration, since the burner valve total closing signal 12 is established irrespective of the boiler pressure state, an abnormality due to a failure of the temperature measuring device or a disconnection of the connection line when the boiler is stopped is detected. , Alarm signal 9 is generated. Here, the same state is shown when the burner valve is fully closed and when the boiler is stopped.
【００２０】次に、バーナ弁全数閉信号１２が不成立で
ある場合を説明する。これは、ボイラ運転中であり、ボ
イラの圧力条件により二安定回路１０が動作することを
示す。かかる回路の場合、圧力測定器ＰＸ１又はＰＸ２
により検出された圧力ＴＰが０Ｋから２５Ｋより大きく
なるまでの間、二安定回路１０がリセット状態にあるた
め、ＯＲ回路１３の出力１４が“０”となってＡＮＤ回
路７のＡＮＤ上限が成立しなくなる。このため、ボイラ
起動途中の圧力が２５Ｋ未満である時点においては、シ
グナルモニタ５から“二重化偏差大”の偏差検出信号６
が発生しても、この偏差検出信号６は無視され、温度制
御回路４への警報信号９は発生しない。Next, the case where the burner valve fully closed signal 12 is not established will be described. This indicates that the bistable circuit 10 is operating depending on the boiler pressure condition while the boiler is operating. In the case of such a circuit, the pressure measuring device PX1 or PX2
Since the bistable circuit 10 is in the reset state until the pressure TP detected by is larger than 0K to 25K, the output 14 of the OR circuit 13 becomes "0" and the AND upper limit of the AND circuit 7 is established. Disappear. Therefore, at the time when the pressure during the boiler startup is less than 25K, the deviation detection signal 6 of "large duplication deviation" is output from the signal monitor 5.
Even if occurs, the deviation detection signal 6 is ignored and the alarm signal 9 to the temperature control circuit 4 is not generated.
【００２１】続いて、圧力が２５Ｋ以上となる領域に入
ると、ボイラが乾くようになるので、ドレンの影響によ
り“二重化偏差大”の偏差検出信号６が発生しなくな
る。そこで、二安定回路１０をセット状態に切り替え
て、そのセット出力信号１１によりＯＲ回路１３の出力
１４が“１”となってＡＮＤ回路７を成立させうる状態
とする。かかる状態において、温度測定器ＴＥ１又はＴ
Ｅ２の故障又は接続ラインの断線等に起因して、偏差検
出信号６が発生したときは、ＡＮＤ回路７及び入切スイ
ッチ８を通し、“二重化偏差大”の警報信号９が温度制
御回路４に入力される。Then, when the pressure enters the region where the pressure is 25 K or more, the boiler becomes dry, and the deviation detection signal 6 of "large duplication deviation" is not generated due to the influence of drain. Therefore, the bistable circuit 10 is switched to the set state, and the set output signal 11 causes the output 14 of the OR circuit 13 to be "1" so that the AND circuit 7 can be established. In such a state, the temperature measuring device TE1 or T
When the deviation detection signal 6 is generated due to the failure of E2 or the disconnection of the connection line, etc., the AND circuit 7 and the on / off switch 8 are passed, and the alarm signal 9 of "duplication deviation is large" is sent to the temperature control circuit 4. Is entered.
【００２２】[0022]
【発明の効果】以上要するに本発明のボイラの過熱器出
口蒸気温度二重計装検出回路によれば、温度測定器の故
障や接続ラインの断線等に起因する場合と、それ以外の
ボイラの起動時におけるドレンの影響に起因する場合と
が区別され、ボイラの起動時においてドレンの影響によ
る温度偏差が検出されたときは、温度制御回路への偏差
警報を出さないようにすることができる。従って、不要
な警報による運転保守員の負担が軽減される。In summary, according to the boiler superheater outlet steam temperature double instrumentation detection circuit of the present invention, there are cases where the temperature measuring device is broken down, the connection line is broken, and the other boilers are started. When the temperature deviation due to the influence of the drain is detected at the time of starting the boiler, it is possible not to issue the deviation alarm to the temperature control circuit. Therefore, the burden on the operation and maintenance staff due to unnecessary alarms is reduced.
【図１】本発明のボイラの過熱器出口蒸気温度の二重計
装検出回路の一実施例を示す構成図である。FIG. 1 is a configuration diagram showing an embodiment of a dual instrumentation detection circuit for a superheater outlet steam temperature of a boiler of the present invention.
【図２】ボイラの３次過熱器出口における主蒸気管と計
測器との関係を示す図である。FIG. 2 is a diagram showing a relationship between a main steam pipe and a measuring instrument at an outlet of a tertiary superheater of a boiler.
１，２ 変換器 ３ 切替器 ４ 温度制御回路 ５ シグナルモニタ６ 偏差検出信号 ７ ＡＮＤ回路 ８ 二重化計装インタロック入切スイッチ ９ 警報信号 １０ 二安定回路 １１ セット出力信号 １２ バーナ弁全数閉の信号 １３ ＯＲ回路 １４ ＯＲ回路の出力 ａ ３次過熱器 ｂ，ｃ 主蒸気管 ＴＥ１〜ＴＥ４ 温度測定器 ＰＸ１〜ＰＸ２ 圧力測定器 1, 2 Converter 3 Switching device 4 Temperature control circuit 5 Signal monitor 6 Deviation detection signal 7 AND circuit 8 Redundant instrumentation interlock ON / OFF switch 9 Alarm signal 10 Bi-stable circuit 11 Set output signal 12 Burner valve fully closed signal 13 OR circuit 14 Output of OR circuit a Third superheater b, c Main steam pipe TE1 to TE4 Temperature measuring device PX1 to PX2 Pressure measuring device
Claims (1)
の各々に流下方向に離して温度測定器を一対ずつ設け、
使用中の主蒸気管に属する両温度測定器の出力偏差が大
きいときに偏差検出信号を出力させ、これを偏差警報と
して温度制御回路に与えるように構成した二重計装検出
回路において、使用中の主蒸気管に属する圧力測定器に
よる計測圧力が、ボイラ起動時のホットクリーンナップ
終了後の圧力上昇過程の規定値を越えるまで、上記偏差
検出信号を禁止する条件回路を設け、上記規定値をドレ
ンの一時的流入により偏差検出信号の発生する圧力値よ
り高い値に定めたことを特徴とするボイラの過熱器出口
蒸気温度の二重計装検出回路。1. A pair of temperature measuring devices are provided in each of the two main steam pipes from the superheater of the boiler, separated from each other in the downward direction.
A dual instrumentation detection circuit configured to output a deviation detection signal when the output deviation of both temperature measuring instruments belonging to the main steam pipe in use is large and to give this to the temperature control circuit as a deviation alarm. Until the pressure measured by the pressure measuring instrument belonging to the main steam pipe exceeds the specified value of the pressure rise process after the hot cleanup at the time of boiler start-up, the condition circuit that prohibits the deviation detection signal is provided and the specified value is drained. Dual-instrumentation detection circuit for boiler superheater outlet steam temperature, which is set to a value higher than the pressure value at which the deviation detection signal is generated due to the temporary inflow of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4220295A JPH0666411A (en) | 1992-08-19 | 1992-08-19 | Double instrumentation detection circuit for steam temperature at outlet of superheater of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4220295A JPH0666411A (en) | 1992-08-19 | 1992-08-19 | Double instrumentation detection circuit for steam temperature at outlet of superheater of boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0666411A true JPH0666411A (en) | 1994-03-08 |
Family
ID=16748928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4220295A Pending JPH0666411A (en) | 1992-08-19 | 1992-08-19 | Double instrumentation detection circuit for steam temperature at outlet of superheater of boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0666411A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313277A (en) * | 2010-07-02 | 2012-01-11 | 上海望特能源科技有限公司 | Method for carrying out real-time furnace monitoring for pulverized-coal boiler-superheater reheater |
-
1992
- 1992-08-19 JP JP4220295A patent/JPH0666411A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313277A (en) * | 2010-07-02 | 2012-01-11 | 上海望特能源科技有限公司 | Method for carrying out real-time furnace monitoring for pulverized-coal boiler-superheater reheater |
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