JPH0452407A - Method of controlling reheated steam temperature - Google Patents
Method of controlling reheated steam temperatureInfo
- Publication number
- JPH0452407A JPH0452407A JP15883890A JP15883890A JPH0452407A JP H0452407 A JPH0452407 A JP H0452407A JP 15883890 A JP15883890 A JP 15883890A JP 15883890 A JP15883890 A JP 15883890A JP H0452407 A JPH0452407 A JP H0452407A
- Authority
- JP
- Japan
- Prior art keywords
- ratio
- damper
- load
- reheater
- recirculation
- 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
- 238000000034 method Methods 0.000 title claims description 24
- 238000002485 combustion reaction Methods 0.000 claims abstract description 17
- 239000000446 fuel Substances 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 39
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 11
- 239000003546 flue gas Substances 0.000 claims description 11
- 230000001052 transient effect Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 230000000630 rising effect Effects 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 18
- 238000010586 diagram Methods 0.000 description 10
- 238000003303 reheating Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は再熱蒸気温度制御に排ガス再循環方式とパラレ
ルダンパ方式を併用しているボイラに係り、特に再循環
排ガス量を負荷静定時等において必要最小限に抑えて高
効率な運転を可能とするボイラの再熱蒸気温度制御方式
に関する。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a boiler that uses both an exhaust gas recirculation method and a parallel damper method for reheating steam temperature control, and particularly relates to a boiler that uses both an exhaust gas recirculation method and a parallel damper method to control the temperature of reheated steam. This invention relates to a boiler reheat steam temperature control method that enables highly efficient operation by minimizing the necessary minimum temperature.
［従来の技術］
再熱蒸気温度制御に燃焼排ガス再循環方式とパラレルダ
ンパ方式を併用しているボイラにおいては、第４図は示
すように、燃焼排ガス１の一部はブロワ２および排ガス
循環量調節ダンパ３を経由して再循環されて火炉底部４
より導入され、バーナ５と二段燃焼空気口６とで燃焼さ
れる燃焼ガスと火炉７内で混合される。混合後の燃焼ガ
スは過熱器、再熱器列８を経て、二液路に分割された第
１段再熱器９および第１段過熱器、節炭器列１０を通過
後、排出される。再熱器９と過熱器、節炭器列１０の後
流側にはそれぞれ排ガス流量調節用のダンパ１１．１２
が設けられている。[Prior art] In a boiler that uses both the flue gas recirculation method and the parallel damper method for reheating steam temperature control, as shown in FIG. It is recirculated via the regulating damper 3 to the furnace bottom 4.
It is mixed in the furnace 7 with the combustion gas that is introduced from the furnace 7 and is combusted in the burner 5 and the two-stage combustion air port 6. The mixed combustion gas passes through a superheater and reheater row 8, a first stage reheater 9 which is divided into two liquid paths, and a first stage superheater and economizer row 10, and then is discharged. . On the downstream side of the reheater 9, superheater, and economizer row 10, there are dampers 11 and 12 for adjusting the flow rate of exhaust gas, respectively.
is provided.
燃焼排ガス再循環方式とパラレルダンパ方式の再熱蒸気
温度制御の原理は以下に示す通りである。The principles of reheated steam temperature control using the combustion exhaust gas recirculation method and the parallel damper method are as shown below.
（イ）排ガス再循環方式
再循環排ガス比（以下ＧＲ比と称す、）を下記のように
定義する。(a) Exhaust gas recirculation method The recirculation exhaust gas ratio (hereinafter referred to as GR ratio) is defined as follows.
ＧＲ比の変化は以下のような再熱蒸気温度への影響を有
する。Changes in the GR ratio have the following effects on the reheat steam temperature.
（１）ＧＲ比の増加（減少）により火炉内ガス温度が低
下（上昇）し、またー、火炉内ガス滞留時間が短縮（延
長）し、火炉内熱吸収量が減少（増加）する。(1) As the GR ratio increases (decreases), the gas temperature in the furnace decreases (increases), the gas residence time in the furnace decreases (extends), and the amount of heat absorption in the furnace decreases (increases).
（２）ＧＲ比の増加（減少）により再熱器蒸気管外のガ
ス流速が増加（減少）して、再熱器蒸気管伝熱率が増加
（減少）する。(2) As the GR ratio increases (decreases), the gas flow rate outside the reheater steam pipe increases (decreases), and the reheater steam pipe heat transfer rate increases (decreases).
（３）上記（１）および（２）により、ＧＲ比が増加（
減少）することにより再熱蒸気温度は上昇（低下）する
。(3) Due to (1) and (2) above, the GR ratio increases (
(decrease), the reheat steam temperature increases (decrease).
第５図はＧＲ比の静特性例を示す。ＧＲ比はボイラ負荷
が高いほど低いという特性を持つが、最高負荷時でも、
ある比率が確保されている。これは主に、第６図に示す
負荷上昇時の過渡的アンダーシュートを考慮して、アン
ダーシュート幅を持たせたためである。FIG. 5 shows an example of static characteristics of the GR ratio. The GR ratio has the characteristic that the higher the boiler load, the lower it is, but even at maximum load,
A certain ratio is guaranteed. This is mainly because the undershoot width is provided in consideration of the transient undershoot when the load increases as shown in FIG.
すなわち、負荷上昇時は、オーバーファイアリング（燃
料および空気のオーバーシュート）により再熱蒸気温度
が過上昇傾向となるため、これを修正するために、ＧＲ
比のアンダーシュートを行っている。第７図の再熱蒸気
温度制御基本系統図中負荷変化時補正回路３３−により
本アンダーシュートが行われている。In other words, when the load increases, the reheat steam temperature tends to rise excessively due to overfiring (overshoot of fuel and air), so in order to correct this, the GR
There is an undershoot in the ratio. In the basic system diagram for reheating steam temperature control shown in FIG. 7, this undershoot is performed by the load change correction circuit 33-.
（ロ）パラレルダンパ方式
第１段再熱器９側（第４図）の通過ガス流量を増加（減
少）させ、第１段過熱器、節炭器列１０側（第４図）の
通過ガス量を減少（増加）させることにより、第１段再
熱器９側の熱吸収が増加（減少）し、再熱蒸気温度は上
昇（低下）する。(b) Parallel damper method Increase (decrease) the flow rate of the gas passing through the first stage reheater 9 side (Figure 4), and increase (decrease) the flow rate of the gas passing through the first stage superheater and economizer row 10 side (Figure 4). By decreasing (increasing) the amount, heat absorption on the first stage reheater 9 side increases (decreases), and the reheat steam temperature increases (decreases).
また、再熱蒸気温度制御方式において、ボイラ起動時と
通常運転時におけるＧＲ比の制御プログラムを変えるこ
とにより、ボイラ起動時のボイラ負荷が小さいときにも
ＧＲ比による再熱蒸気温度の制御ができることが知られ
ている。（特公昭６２−３５５６１号）。In addition, in the reheat steam temperature control method, by changing the GR ratio control program at boiler startup and during normal operation, it is possible to control the reheat steam temperature using the GR ratio even when the boiler load at boiler startup is small. It has been known. (Special Publication No. 62-35561).
［発明が解決しようとする課題］
上記排ガス再循環方式とパラレルダンパ方式を併用した
再熱蒸気温度制御方式は、負荷上昇時のＧＲ比アンダー
シュートを考慮しているがために、負荷静定状態等にお
いては過大なＧＲ比となっている。過大なＧＲ比は、以
下の効率低下を引き起こしている。[Problems to be Solved by the Invention] The reheat steam temperature control method using both the exhaust gas recirculation method and the parallel damper method takes into account the GR ratio undershoot when the load increases, so etc., the GR ratio is excessive. An excessive GR ratio causes the following efficiency decline.
（１）前述のように、再循環排ガスは炉内ガス温度を低
下させる働きを持つが、炉内ガス温度の低下は燃焼効率
を低下させる要因となる。特に石炭燃焼においては、Ｇ
Ｒ比増加による燃焼効率の低下は著しい。第８図はＧＲ
比が微粉炭の未燃焼率に及ぼす影響を示す。ＧＲ比の増
加に伴い燃料の未燃焼率が増加している。(1) As mentioned above, the recirculated exhaust gas has the function of lowering the furnace gas temperature, but the decrease in the furnace gas temperature becomes a factor that lowers the combustion efficiency. Especially in coal combustion, G
The decrease in combustion efficiency due to the increase in R ratio is significant. Figure 8 is GR
The effect of the ratio on the unburned rate of pulverized coal is shown. As the GR ratio increases, the unburned rate of fuel increases.
（２）過大なＧＲ比は排ガス再循環ファン（ＧＲＦ）の
動力の浪費につながる。(2) Excessive GR ratio leads to waste of power of exhaust gas recirculation fan (GRF).
また、前記特公昭６２−３５５６１号公報記載の発明は
負荷上昇時にＧＲ比による再熱蒸気温度制御を可能とす
るため、負荷上昇時に特別な制御プログラムを用意する
必要があった。Furthermore, since the invention described in Japanese Patent Publication No. 62-35561 enables reheated steam temperature control using the GR ratio when the load increases, it is necessary to prepare a special control program when the load increases.
そこで、本発明の目的は、上記負荷静定時の過大なＧＲ
比を低減して、燃料の未燃焼率を下げ、高効率な運転を
可能とすることにある。Therefore, an object of the present invention is to reduce the excessive GR during the load stabilization.
The objective is to reduce the ratio, lower the unburned rate of fuel, and enable highly efficient operation.
また、本発明の目的は負荷上昇時に特別な制御プログラ
ムを用いなくても、負荷上昇時を含めてＧＲ比による再
熱蒸気温度制御を可能とし、しかも負荷静定時のＧＲ比
を減少させた再熱蒸気温度制御を可能とすることである
。Another object of the present invention is to enable reheat steam temperature control using the GR ratio, including when the load increases, without using a special control program, and to reduce the GR ratio when the load is stable. The purpose is to enable thermal steam temperature control.
［課題を解決するための手段］ 本発明の上記目的は次の構成により達成される。[Means to solve the problem] The above object of the present invention is achieved by the following configuration.
すなわち、再熱蒸気を発生させる再熱器と、主蒸気を発
生させる過熱器と、これら再熱器と過熱器に燃焼排ガス
の通過流量を配分制御する再熱器ダンパと過熱器ダンパ
と、ボイラ本体側へ再循環する燃焼排ガスの再循環流量
を制御する再循環ダンパと、を配設させたボイラの再熱
蒸気温度制御方法において、
燃焼排ガスの再循環量の全燃焼排ガス量に対する比率で
ある再循環燃焼排ガス比は、負荷上昇時には過渡的アン
ダーシュートを許容する値とし、負荷上昇時以外のボイ
ラ運転時には前記再循環燃焼排ガス比を負荷上昇時より
下げるように再循環ダンパのダンパの開度を調整するこ
とを特徴とする再熱蒸気温度制御方法、または、
前記負荷上昇時以外のボイラ運転時には、前記再循環燃
焼排ガス比に追従して、あるいは並行して再熱器ダンパ
と過熱器ダンパの開度をそれぞれ調整する上記再熱蒸気
温度制御方法、または、負荷上昇時以外の前記低再循環
排ガス比の設定は燃料性状や運転状態に応じて、二辺上
の再循環燃焼排ガス比率設定プログラムから選択する上
記再熱蒸気温度制御方法、
である。That is, a reheater that generates reheat steam, a superheater that generates main steam, a reheater damper and a superheater damper that distribute and control the flow rate of flue gas passing through these reheaters and superheaters, and a boiler. In a reheat steam temperature control method for a boiler equipped with a recirculation damper that controls the recirculation flow rate of combustion exhaust gas that is recirculated to the main body side, it is the ratio of the amount of recirculation of combustion exhaust gas to the total amount of combustion exhaust gas. The recirculated flue gas ratio is set to a value that allows transient undershoot when the load increases, and when the boiler is operating other than when the load increases, the damper opening of the recirculation damper is adjusted so that the recirculated flue gas ratio is lower than when the load increases. A reheat steam temperature control method characterized by adjusting a reheater damper and a superheater damper in accordance with or in parallel with the recirculated combustion exhaust gas ratio during boiler operation other than when the load increases. The above-mentioned reheat steam temperature control method adjusts the opening degree of each, or the setting of the low recirculation exhaust gas ratio except when the load increases is based on the recirculation combustion exhaust gas ratio setting on the two sides depending on the fuel properties and operating conditions. The reheat steam temperature control method is selected from a program.
［作用］
再循環燃焼排ガス比は、負荷上昇時には過渡的アンダー
シュートを許容するだけの大きい値とし、負荷上昇時以
外のボイラ運転時には、再循環ダンパの開度を調整する
ことにより負荷上昇時の値より下げる。[Effect] The recirculation combustion exhaust gas ratio is set to a value large enough to allow transient undershoot when the load increases, and when the boiler is operating other than when the load increases, the opening degree of the recirculation damper is adjusted to reduce the lower than the value.
前記負荷上昇時以外のボイラ運転時には、前記再循環燃
焼排ガス比に追従して、あるいは並行して再熱器と過熱
器通過燃焼排ガス量を変化させるように再熱器ダンパお
よび／または過熱器ダンパの開度を調整することにより
再熱蒸気温度を制御することができる。During boiler operation other than when the load increases, a reheater damper and/or a superheater damper is used to change the amount of flue gas passing through the reheater and superheater in accordance with or in parallel with the recirculated flue gas ratio. The reheating steam temperature can be controlled by adjusting the opening degree of the reheating steam.
負荷上昇時以外の低再循環排ガス比率の設定を燃料性状
や運転状態に応じて、二辺上の再循環燃焼排ガス比率設
定プログラムを例えば手動操作により選択することがで
きる。The setting of the low recirculation exhaust gas ratio at times other than when the load increases can be selected from the recirculation combustion exhaust gas ratio setting program on the two sides, for example, by manual operation, depending on the fuel properties and operating conditions.
［実施例］ 本発明の実施例を図面と共に説明する。[Example] Embodiments of the present invention will be described with reference to the drawings.
なお、本制御装置は第４図に示すボイラに適用される。Note that this control device is applied to the boiler shown in FIG.
このとき、負荷静定時においてＧＲ比を低下させると過
熱器、節炭器列１０側に比べて再熱器９側の方がよりガ
ス流量が低下する。そのため、負荷静定時にＧＲ比を下
げたときは、第１図に示すように負荷上昇時に比べて、
過熱器１０側のガス流量を減少させ、再熱器９側のガス
流量を増加させることで、再熱蒸気温度を上昇させるよ
うに修正制御する。At this time, when the GR ratio is lowered during load stabilization, the gas flow rate decreases more on the reheater 9 side than on the superheater and economizer array 10 side. Therefore, when the GR ratio is lowered when the load is stable, compared to when the load increases, as shown in Figure 1,
By reducing the gas flow rate on the superheater 10 side and increasing the gas flow rate on the reheater 9 side, corrective control is performed to increase the reheat steam temperature.
第２図は上記概念を具体化する制御装置基本系統図の例
を示す、再熱蒸気温度発信器２１より出力された再熱蒸
気温度信号は、負荷信号２２に対応した関数発生器２３
による再熱蒸気温度設定値と減算器２４において比較さ
れ、再熱蒸気温度偏差信号を得る０本偏差をゼロにすべ
く基本的にはパラレルダンパ１１．１２（第４図）によ
り制御が行われる。すなわち、再熱蒸気温度偏差信号に
応じて第１段再熱器９側のダンパ１１は動作し、過熱器
、節炭器列１ｏｙ！Ｉ！のダンパ１２は関数発生器３８
による逆動作信号に従い動作する。FIG. 2 shows an example of a basic system diagram of a control device embodying the above concept.
The subtractor 24 compares the reheat steam temperature with the reheat steam temperature set value by . That is, the damper 11 on the first stage reheater 9 side operates according to the reheat steam temperature deviation signal, and the superheater and economizer array 1oy! I! The damper 12 is a function generator 38
It operates according to the reverse operation signal.
排ガス循環調節ダンパ３（第４図）を用いる排ガス再循
環量調節系はプログラム制御であるが、その設定プログ
ラムとして関数発生器２９〜３１の３種類を有している
。The exhaust gas recirculation amount control system using the exhaust gas circulation control damper 3 (FIG. 4) is program controlled, and has three types of function generators 29 to 31 as setting programs.
その選択は三種類のボタンをもつ選択ボタン３２により
行う。関数発生器２９は従来技術からなる通常のＧＲ比
設定を、関数発生器３ｏ、３１はＧＲ比を低減した二種
類の設定を行うものである。The selection is made using the selection button 32 which has three types of buttons. The function generator 29 performs normal GR ratio setting according to the prior art, and the function generators 3o and 31 perform two types of settings in which the GR ratio is reduced.
低ＧＲ比の二種類の設定は、燃料性状や運転状態に応じ
て設定を変えることができるように考慮したものである
。The two types of settings for the low GR ratio are designed so that the settings can be changed depending on the fuel properties and operating conditions.
なお、排ガス再循環調節系においても、再熱蒸気温度偏
差信号による補正が行われ、開数発生器２５により補正
ゲインの設定が与えられる低ＧＲ比は下記条件下で選択
することができる。In the exhaust gas recirculation control system as well, correction is performed using the reheated steam temperature deviation signal, and a low GR ratio for which correction gain settings are given by the numerical value generator 25 can be selected under the following conditions.
（１）負荷靜定時
（２）負荷降下時（第６図のようにＧＲ比はオーバーシ
ュート動作となるのでＧＲ比を多少下げても問題はない
。）
（３）ＧＲ比のアンダーシュートが小さいゆるやかな負
荷変化時
低ＧＲ比設定を選択することにより、再循環排ガス量は
減少する。これに伴い再熱蒸気温度は低下傾向となるが
、第１図を用いて先に説明したように再熱器温度の基本
制御端であるパラレルダンパ１１．１２の修正動作によ
り、再熱蒸気温度は所定の値に維持される。(1) When the load is steady (2) When the load drops (as shown in Figure 6, the GR ratio will overshoot, so there is no problem even if the GR ratio is lowered a little.) (3) The undershoot of the GR ratio is small. By selecting a low GR ratio setting during gradual load changes, the amount of recirculated exhaust gas is reduced. As a result, the reheated steam temperature tends to decrease, but as explained earlier using FIG. 1, the reheated steam temperature is maintained at a predetermined value.
本発明の他の実施例として下記の例が挙げられる。Other examples of the present invention include the following.
（１）負荷変化条件が定形化されている場合には、その
条件に基づき自動的に負荷上昇時のＧＲ比設定およびそ
の他の条件に対するＧＲ比設定を行ってもよい。(1) When the load change conditions are standardized, the GR ratio setting at the time of load increase and the GR ratio setting for other conditions may be automatically performed based on the conditions.
（２）給電指令が第３図のように単純であり、かつ給電
指令から実際に負荷変化を行うまでに、ＧＲ比段設定変
化伴うダンパ実開度変化が可能な時間的予裕度がある場
合には、給電指令に基づき自動的にＧＲ比設定を選択す
るようにしてもよい。(2) The power supply command is simple as shown in Figure 3, and there is enough time from the power supply command until the load is actually changed to allow for a change in the actual damper opening along with a change in the GR ratio setting. In some cases, the GR ratio setting may be automatically selected based on the power supply command.
（３）第２図に示すＧＲ比段設定用関数発生器２９〜３
１数は運転条件に応じて任意に増減可能である。(3) GR ratio setting function generators 29 to 3 shown in Fig. 2
The number can be increased or decreased as desired depending on the operating conditions.
［発明の効果］
本発明によれば、比較的簡単な制御によりＧＲ比を必要
最少限まで低減できるので、燃焼効率向上によるボイラ
効率の上昇および排ガス循環ファン（ＧＲＦ）の動力低
減に効果がある。[Effects of the Invention] According to the present invention, the GR ratio can be reduced to the necessary minimum through relatively simple control, which is effective in increasing boiler efficiency by improving combustion efficiency and reducing the power of the exhaust gas circulation fan (GRF). .
第１図は本発明の概念図、第２図は本発明からなる制御
基本系統図、第３図は単純な負荷変化パターンの例を示
す図、第４図は排ガス再循環方式とパラレルダンパ方式
を併用しているボイラの構成を示す概念図、第５図は従
来技術からなるＧＲ比の特性例を示す図、第６図は負荷
変化時のＧＲ比挙動例を示す図、第７図は従来技術から
なる制御基本系統図、第８図はＧＲ比が未燃焼率に及ぼ
す影響例を示す図である。
３・・・排ガス循環量調節ダンパ、９・・・第１段再熱
器、１０・・・過熱器、節炭器列、１１・・・再熱器側
パラレルダンパ、１２・・・過熱器側パラレルダンパｗ
ｃ１図
出願人 バブコック日立株式会社
代理人 弁理士 松永孝義 はか１名
ボイラ負荷→
第
図
第
図
第
図
ボイラ負荷□
第
図
時
間（ｈ）
第
図
時
間
第
図
第
図
ＧＲ比→Figure 1 is a conceptual diagram of the present invention, Figure 2 is a basic control system diagram of the present invention, Figure 3 is a diagram showing an example of a simple load change pattern, and Figure 4 is an exhaust gas recirculation system and a parallel damper system. Fig. 5 is a diagram showing an example of GR ratio characteristics based on the conventional technology, Fig. 6 is a diagram showing an example of GR ratio behavior when the load changes, and Fig. 7 is a diagram showing an example of GR ratio behavior when the load changes. FIG. 8, a basic control system diagram according to the prior art, is a diagram showing an example of the influence of the GR ratio on the unburned rate. 3... Exhaust gas circulation amount adjustment damper, 9... First stage reheater, 10... Superheater, economizer row, 11... Reheater side parallel damper, 12... Superheater side parallel damper w
Figure c1 Applicant Babcock Hitachi Co., Ltd. Agent Patent Attorney Takayoshi Matsunaga 1 person Boiler load → Figure Figure Figure Boiler load □ Figure Time (h) Figure Time (h) Figure Time Figure GR ratio →
Claims (3)
せる過熱器と、これら再熱器と過熱器に燃焼排ガスの通
過流量を配分制御する再熱器ダンパと過熱器ダンパと、
ボイラ本体側へ再循環する燃焼排ガスの再循環流量を制
御する再循環ダンパと、を配設させたボイラの再熱蒸気
温度制御方法において、 燃焼排ガスの再循環量の全燃焼排ガス量に対する比率で
ある再循環燃焼排ガス比は、負荷上昇時には過渡的アン
ダーシュートを許容する値とし、負荷上昇時以外のボイ
ラ運転時には前記再循環燃焼排ガス比を負荷上昇時より
下げるように再循環ダンパのダンパの開度を調整するこ
とを特徴とする再熱蒸気温度制御方法。(1) A reheater that generates reheat steam, a superheater that generates main steam, a reheater damper and a superheater damper that distribute and control the flow rate of combustion exhaust gas to these reheaters and superheaters,
In a reheat steam temperature control method for a boiler equipped with a recirculation damper that controls the recirculation flow rate of flue gas recirculated to the boiler body, the ratio of the amount of recirculated flue gas to the total amount of flue gas is A certain recirculated flue gas ratio is set to a value that allows transient undershoot when the load increases, and when the boiler is operating other than when the load increases, the damper of the recirculation damper is opened so that the recirculated flue gas ratio is lower than when the load increases. A reheat steam temperature control method characterized by adjusting the temperature.
循環燃焼排ガス比に追従して、あるいは並行して再熱器
ダンパと過熱器ダンパの開度をそれぞれ調整することを
特徴とする請求項１記載の再熱蒸気温度制御方法。(2) When the boiler is operated other than when the load increases, the opening degrees of the reheater damper and the superheater damper are respectively adjusted in accordance with or in parallel with the recirculated combustion exhaust gas ratio. 1. The reheat steam temperature control method according to 1.
燃料性状や運転状態に応じて、二以上の再循環燃焼排ガ
ス比率設定プログラムから選択することを特徴とする請
求項１または２記載の再熱蒸気温度制御方法。(3) The setting of the low recirculation exhaust gas ratio at times other than when the load increases is selected from two or more recirculation combustion exhaust gas ratio setting programs depending on fuel properties and operating conditions. reheat steam temperature control method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15883890A JP2915502B2 (en) | 1990-06-19 | 1990-06-19 | Reheat steam temperature control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15883890A JP2915502B2 (en) | 1990-06-19 | 1990-06-19 | Reheat steam temperature control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0452407A true JPH0452407A (en) | 1992-02-20 |
| JP2915502B2 JP2915502B2 (en) | 1999-07-05 |
Family
ID=15680507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15883890A Expired - Fee Related JP2915502B2 (en) | 1990-06-19 | 1990-06-19 | Reheat steam temperature control method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2915502B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014013559A1 (en) * | 2012-07-18 | 2014-01-23 | 株式会社 日立製作所 | Coal-fired power plant |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101898233B1 (en) * | 2016-08-23 | 2018-09-12 | 강림중공업 주식회사 | A Economizer for Waste Heat Recovery |
-
1990
- 1990-06-19 JP JP15883890A patent/JP2915502B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014013559A1 (en) * | 2012-07-18 | 2014-01-23 | 株式会社 日立製作所 | Coal-fired power plant |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2915502B2 (en) | 1999-07-05 |
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