JPH04251102A - Control method of once-through boiler - Google Patents
Control method of once-through boilerInfo
- Publication number
- JPH04251102A JPH04251102A JP105591A JP105591A JPH04251102A JP H04251102 A JPH04251102 A JP H04251102A JP 105591 A JP105591 A JP 105591A JP 105591 A JP105591 A JP 105591A JP H04251102 A JPH04251102 A JP H04251102A
- Authority
- JP
- Japan
- Prior art keywords
- boiler
- outlet
- enthalpy
- once
- fluid
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims description 10
- 239000012530 fluid Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000446 fuel Substances 0.000 claims abstract description 9
- 230000001052 transient effect Effects 0.000 abstract description 2
- 239000007921 spray Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、貫流ボイラの制御方法
、特に火炉壁出口流体エンタルピ制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a once-through boiler, and more particularly to a method for controlling fluid enthalpy at the outlet of a furnace wall.
【０００２】0002
【従来の技術】図２は従来の貫流ボイラの制御方法の一
例を示す概念図である。この図において、１はエコノマ
イザ、２はボイラ火炉壁、３は煙道蒸発器、４は気水分
離器、５は一次過熱器、６は過熱器過熱低減器、７は二
次過熱器、８は燃料流量調節弁、９はスプレ水量調節弁
、１０は温度検出器、１１は温度差検出器、１２，１３
は調節計をそれぞれ示す。2. Description of the Related Art FIG. 2 is a conceptual diagram showing an example of a conventional control method for a once-through boiler. In this figure, 1 is an economizer, 2 is a boiler furnace wall, 3 is a flue evaporator, 4 is a steam separator, 5 is a primary superheater, 6 is a superheater attenuator, 7 is a secondary superheater, 8 1 is a fuel flow rate control valve, 9 is a spray water amount control valve, 10 is a temperature detector, 11 is a temperature difference detector, 12, 13
indicate controllers.
【０００３】従来の貫流ボイラでは、ボイラ出口主蒸気
温度を温度検出器１０で検出し、調節計１２により燃料
流量調節弁８を制御して、燃焼量を加減するとともに、
過熱器過熱低減器６出入口の温度差を温度差検出器１０
で検出し、その温度差と上記ボイラ出口主蒸気温度に基
づいて、調節計１３によりスプレ水量調節弁９を制御し
て、スプレ水量を加減し、ボイラ出口主蒸気温度を調節
していた。In a conventional once-through boiler, a temperature detector 10 detects the main steam temperature at the boiler outlet, and a controller 12 controls a fuel flow control valve 8 to adjust the combustion amount.
A temperature difference detector 10 detects the temperature difference between the entrance and exit of the superheater and desuperheater 6.
Based on the temperature difference and the boiler outlet main steam temperature, the spray water amount control valve 9 is controlled by the controller 13 to adjust the spray water amount and adjust the boiler outlet main steam temperature.
【０００４】0004
【発明が解決しようとする課題】従来は火炉壁出口流体
のエンタルピは制御しておらず、したがってこのエンタ
ルピが過渡的に過大に上昇する場合があった。[Problems to be Solved by the Invention] Conventionally, the enthalpy of the fluid at the outlet of the furnace wall has not been controlled, and therefore the enthalpy may transiently increase excessively.
【０００５】[0005]
【課題を解決するための手段】本発明は、前記従来の課
題を解決するために、ボイラ出口主蒸気温度を検出し、
この温度が所定範囲内になるよう、過熱器過熱低減器の
スプレ水量を加減するとともに、火炉壁出口流体のエン
タルピを検出し、このエンタルピが所定範囲内になるよ
う、燃料流量を加減することを特徴とする貫流ボイラの
制御方法を提案するものである。[Means for Solving the Problems] In order to solve the above-mentioned conventional problems, the present invention detects the boiler outlet main steam temperature,
In order to keep this temperature within a predetermined range, the amount of water sprayed by the superheater and desuperheater is adjusted, and the enthalpy of the fluid at the outlet of the furnace wall is detected, and the fuel flow rate is adjusted so that this enthalpy falls within a predetermined range. This paper proposes a control method for a characteristic once-through boiler.
【０００６】[0006]
【作用】本発明の方法においては、貫流ボイラの火炉壁
出口流体のエンタルピを検出し、これが規定値よりも上
昇／下降した場合に、燃料の燃焼量を減少／増加させ、
火炉壁出口流体エンタルピが規定値となるよう制御する
。また、ボイラ出口主蒸気温度は、過熱器過熱低減器の
スプレ水量を操作して制御する。したがって、エンタル
ピが過渡的に過大になることなく、ボイラの安定運転が
維持される。[Operation] In the method of the present invention, the enthalpy of the fluid at the outlet of the furnace wall of a once-through boiler is detected, and when this increases/decreases more than a specified value, the amount of fuel burned is decreased/increased,
The fluid enthalpy at the outlet of the furnace wall is controlled to a specified value. In addition, the boiler outlet main steam temperature is controlled by manipulating the amount of spray water in the superheater and desuperheater. Therefore, stable operation of the boiler is maintained without enthalpy becoming excessive transiently.
【０００７】[0007]
【実施例】図１は本発明方法の一実施例を示す概念図で
ある。この図において、前記図２により説明した従来の
ものと同様の部分には、冗長になるのを避けるため、同
一の符号を付け、詳しい説明を省く。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a conceptual diagram showing an embodiment of the method of the present invention. In this figure, to avoid redundancy, the same parts as those of the conventional device explained with reference to FIG.
【０００８】本実施例では、貫流ボイラの火炉壁２の出
口に火炉壁出口流体エンタルピ検出器１５を設け、その
エンタルピ検出器１５の検出信号を調節計１６に入力す
る。調節計１６では、この入力信号に基づき燃料流量調
節弁８の制御信号を出力して、上記流体エンタルピが規
定値となるよう、燃料流量調節弁８を遠隔制御する。In this embodiment, a furnace wall outlet fluid enthalpy detector 15 is provided at the outlet of the furnace wall 2 of the once-through boiler, and a detection signal from the enthalpy detector 15 is input to a controller 16. The controller 16 outputs a control signal for the fuel flow control valve 8 based on this input signal, and remotely controls the fuel flow control valve 8 so that the fluid enthalpy becomes a specified value.
【０００９】一方、ボイラ出口主蒸気温度を制御するた
め、二次過熱器７の出口にボイラ出口主蒸気温度検出器
１７を設け、その温度検出器１７の検出信号を調節計１
８に入力する。調節計１８ではこの入力信号に基づき、
スプレ水量調節弁９の制御信号を出力して、上記主蒸気
温度が規定値となるよう、スプレ水量調節弁９を遠隔制
御する。On the other hand, in order to control the boiler outlet main steam temperature, a boiler outlet main steam temperature detector 17 is provided at the outlet of the secondary superheater 7, and the detection signal of the temperature detector 17 is sent to the controller 1.
Enter 8. Based on this input signal, the controller 18
A control signal for the spray water amount regulating valve 9 is output to remotely control the spray water amount regulating valve 9 so that the main steam temperature becomes a specified value.
【００１０】0010
【発明の効果】本発明においては、貫流ボイラの火炉壁
出口流体エンタルピを検出し、これが規定値となるよう
燃焼量を調節すると同時に、ボイラ出口主蒸気温度を検
出し、これが規定値となるように過熱器過熱低減器のス
プレ水量調節弁を調整することにより、従来のようにエ
ンタルピが過渡的に過大に上昇することもなく、安定し
た運転状態を維持することができる。[Effects of the Invention] In the present invention, the fluid enthalpy at the outlet of the furnace wall of a once-through boiler is detected, and the combustion amount is adjusted so that this becomes the specified value.At the same time, the main steam temperature at the boiler outlet is detected and the enthalpy is adjusted so that this becomes the specified value. By adjusting the spray water amount control valve of the superheater desuperheater, stable operating conditions can be maintained without the transient excessive increase in enthalpy unlike in the conventional case.
【図１】図１は本発明方法の一実施例を示す概念図であ
る。FIG. 1 is a conceptual diagram showing an embodiment of the method of the present invention.
【図２】図２は従来の貫流ボイラの制御方法の一例を示
す概念図である。FIG. 2 is a conceptual diagram showing an example of a conventional once-through boiler control method.
１ エコ
ノマイザ２
ボイラ火炉壁３
煙道蒸発器４
気水分離器５
一次過熱器６
過熱器過熱低減器７
二次過熱
器８ 燃
料流量調節弁９
スプレ水量調節弁１０，１７
温度検出器１１
温度差検出器１２，１３，１６，１８
調節計1 Economizer 2
Boiler furnace wall 3
Flue evaporator 4
Steam water separator 5
Primary superheater 6
Superheater desuperheater 7
Secondary superheater 8 Fuel flow control valve 9
Spray water amount control valve 10, 17
Temperature detector 11
Temperature difference detector 12, 13, 16, 18
controller
Claims (1)
温度が所定範囲内になるよう、過熱器過熱低減器のスプ
レ水量を加減するとともに、火炉壁出口流体のエンタル
ピを検出し、このエンタルピが所定範囲内になるよう、
燃料流量を加減することを特徴とする貫流ボイラの制御
方法。Claim 1: The main steam temperature at the boiler outlet is detected, and the amount of water sprayed by the superheater desuperheater is adjusted so that this temperature falls within a predetermined range, and the enthalpy of the fluid at the outlet of the furnace wall is detected, and this enthalpy is within the specified range,
A method for controlling a once-through boiler, characterized by adjusting the fuel flow rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP105591A JPH04251102A (en) | 1991-01-09 | 1991-01-09 | Control method of once-through boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP105591A JPH04251102A (en) | 1991-01-09 | 1991-01-09 | Control method of once-through boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04251102A true JPH04251102A (en) | 1992-09-07 |
Family
ID=11490863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP105591A Withdrawn JPH04251102A (en) | 1991-01-09 | 1991-01-09 | Control method of once-through boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04251102A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008032367A (en) * | 2006-07-31 | 2008-02-14 | Babcock Hitachi Kk | Control method for once-through waste heat recovery boiler |
| JP2020085415A (en) * | 2018-11-30 | 2020-06-04 | 三菱日立パワーシステムズ株式会社 | Boiler system and power generation plant and operation method of boiler system |
-
1991
- 1991-01-09 JP JP105591A patent/JPH04251102A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008032367A (en) * | 2006-07-31 | 2008-02-14 | Babcock Hitachi Kk | Control method for once-through waste heat recovery boiler |
| JP2020085415A (en) * | 2018-11-30 | 2020-06-04 | 三菱日立パワーシステムズ株式会社 | Boiler system and power generation plant and operation method of boiler system |
| WO2020110473A1 (en) * | 2018-11-30 | 2020-06-04 | 三菱日立パワーシステムズ株式会社 | Boiler system, power generation plant, and boiler system operation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19980514 |