JP2634275B2 - Transformer operation method of boiler - Google Patents
Transformer operation method of boilerInfo
- Publication number
- JP2634275B2 JP2634275B2 JP3174990A JP3174990A JP2634275B2 JP 2634275 B2 JP2634275 B2 JP 2634275B2 JP 3174990 A JP3174990 A JP 3174990A JP 3174990 A JP3174990 A JP 3174990A JP 2634275 B2 JP2634275 B2 JP 2634275B2
- Authority
- JP
- Japan
- Prior art keywords
- boiler
- load
- fuel
- pressure
- main steam
- 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 - Lifetime
Links
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、ボイラの変圧運転方法に関し、より詳細に
は、製鉄所などにおいて多種の副生ガス燃料を燃焼させ
る発電ユニットのタービンガバナによるボイラの変圧運
転方法に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of operating a boiler under pressure, and more particularly, to a method of transforming a boiler by a turbine governor of a power generation unit that burns various types of by-product gas fuel in a steel mill. Related to driving method.
従来の技術 従来のボイラの変圧運転は下記のような方法によって
行っている。2. Description of the Related Art A conventional boiler is operated in the following manner.
すなわち、第４図に示す第１の従来例では、負荷を入
力とする関数発生器１にて第５図に示す負荷と主蒸気圧
力との関数により変圧運転カーブを計算し、次いで減算
器２ではプロセス値としての実際の主蒸気圧力より主蒸
気圧力設定値との偏差を求め、そして調節器３を経るこ
とによって得られるボイラマスタ燃料で圧力制御を行う
変圧運転方法である。That is, in the first conventional example shown in FIG. 4, a function generator 1 having a load as an input calculates a variable pressure operation curve by a function of the load and the main steam pressure shown in FIG. Is a variable pressure operation method in which a deviation from a main steam pressure set value is obtained from an actual main steam pressure as a process value, and pressure control is performed using a boiler master fuel obtained by passing through a regulator 3.
次に、第６図に示す第２の従来例によれば、除算器４
が主蒸気圧力（プロセス値）をタービン第１段後圧力で
除し、これを減算器５にてタービンガバナ弁点位置との
偏差を求めて調節器６を経ることにより主蒸気圧力設定
値を求め、後は第１の従来例のように減算器７及び調節
器を経るようにしてボイラマスタ燃料を得る方法であ
る。すなわち、第２の従来例は、タービンガバナ弁を弁
点位置に保てるように主蒸気圧力設定を発生させ、ボイ
ラマスタ燃料で圧力制御を行う変圧運転方法ということ
ができる。Next, according to the second conventional example shown in FIG.
Divides the main steam pressure (process value) by the pressure after the first stage of the turbine, obtains a deviation from the turbine governor valve point position by a subtractor 5 and passes through a controller 6 to obtain a main steam pressure set value. After that, a method of obtaining boiler master fuel through the subtractor 7 and the regulator as in the first conventional example is described. That is, the second conventional example can be said to be a variable pressure operation method in which the main steam pressure is set so as to keep the turbine governor valve at the valve point position, and the pressure is controlled with the boiler master fuel.
しかし、いずれの従来例も、ボイラマスタ燃料が圧力
制御を行い、タービンガバナは負荷制御を行っているの
である。However, in each of the conventional examples, the boiler master fuel controls the pressure, and the turbine governor controls the load.
発明が解決しようとする課題 従来の製鉄所の副生ガスを主燃料とする共同火力発電
所等では熱量の異なる多種の燃料を混焼させて運用して
おり、負荷変動に伴う燃料の投入は燃料、コストを考慮
する必要がある。Problems to be Solved by the Invention In a conventional co-fired power plant using by-product gas of a steel mill as a main fuel, various types of fuels having different calorific values are mixed and operated. Need to consider the cost.
従来の変圧運転方法では、圧力をボイラマスタ燃料で
制御しているので、低負荷で安定燃料を確保するために
は発熱量の高い購入燃料（重油、LNG等）を投入する必
要があり、不経済である。又、圧力制御をボイラ側で行
っているので、マスタ燃料がない領域（運用）では変圧
運転ができなかった。In the conventional variable pressure operation method, since the pressure is controlled by the boiler master fuel, it is necessary to supply purchased fuel (heavy oil, LNG, etc.) with high calorific value to secure stable fuel at low load, which is uneconomical. It is. Further, since the pressure control is performed on the boiler side, the variable pressure operation cannot be performed in an area where no master fuel exists (operation).
本発明はこのような問題点を解決しようとするもの
で、ボイラマスタ燃料が使用できない領域においても変
圧運転を可能とすることを目的とする。The present invention is intended to solve such a problem, and an object of the present invention is to enable a variable pressure operation even in a region where boiler master fuel cannot be used.
課題を解決するための手段 本発明によれば、発電用ボイラにて効率運用のために
低負荷時に主蒸気圧力を減圧する変圧運転方法であっ
て、この変圧運転でボイラ燃料を入力とする負荷の関数
により負荷デマンドを作成し、この負荷デマンドから変
圧カーブを決定し、タービンガバナで圧力制御を行うこ
とを特徴とするボイラの変圧運転方法が提供される。Means for Solving the Problems According to the present invention, there is provided a variable pressure operation method for reducing the main steam pressure at a low load for efficient operation in a power generation boiler. , A load demand is created from the load demand, a transformation curve is determined from the load demand, and pressure control is performed by a turbine governor.
作用 使用燃料の流量等の状態変数名を各燃料種別にX1,X2,
‥‥Xmとし、負荷をY1,Y2,‥‥Ynとすると、これらの間
には次の関係が成立する。X 1, X 2 state variable names flow rate, etc. of the action using the fuel to each fuel type,
Assuming that ‥‥ X m and the loads are Y 1 , Y 2 , and ‥‥ Y n , the following relationship is established among them.
Yi＝fi（X1,X2,‥‥,Xm） （ｉ＝１〜ｎ） この式が、ボイラ入熱量と発電機出力（負荷）との関
係式となる。これを静特性データとしてボイラ制御を実
行する計算機に記憶させる。Y i = f i (X 1 , X 2 , ‥‥, X m ) (i = 1 to n) This expression is a relational expression between the boiler heat input and the generator output (load). This is stored as static characteristic data in a computer that executes boiler control.
この関係式を基に、変圧運転時には各燃料設定値より
負荷デマンドを作成し、タービン制御を行う計算機へ出
力する。この負荷デマンドより変圧カーブを決定し、タ
ービンガバナが圧力制御を行う。Based on this relational expression, a load demand is created from each fuel set value at the time of the variable pressure operation, and is output to a computer that performs turbine control. A transformation curve is determined from the load demand, and the turbine governor performs pressure control.
実施例 本発明の一実施例を第１図、第２図及び第３図によっ
て説明する。Embodiment An embodiment of the present invention will be described with reference to FIGS. 1, 2, and 3. FIG.
第１図によれば、各種のボイラ燃料はそれらの性状に
応じて符号10にてカロリ補正がなされ、カロリ補正され
たボイラ燃料は関数発生器11に入力される。関数発生器
11は第２図に示される関数によってボイラ燃料に対する
負荷デマンドを出力する。次いで、関数発生器12は関数
発生器11の出力である負荷デマンドを入力とし、第３図
に示される変圧カーブ関数によって求められる主蒸気圧
力設定値を出力する。この主蒸気圧力設定値が入力され
る減算器13にはプロセス値としての実際の主蒸気圧力が
フィードバックされ、ここで両者を減算した上、調節器
14を経て、タービンガバナ弁指令値が出力される。この
タービンガバナ弁指令値はそれからボイラ制御を実行す
る計算機に送られる。According to FIG. 1, various boiler fuels are calorie-corrected by reference numeral 10 according to their properties, and the calorie-corrected boiler fuels are input to a function generator 11. Function generator
Numeral 11 outputs the load demand for the boiler fuel by the function shown in FIG. Next, the function generator 12 receives the load demand, which is the output of the function generator 11, as an input, and outputs the main steam pressure set value obtained by the transformation curve function shown in FIG. The actual main steam pressure as a process value is fed back to a subtractor 13 to which the main steam pressure set value is input.
After 14, a turbine governor valve command value is output. This turbine governor valve command value is then sent to a computer that executes boiler control.
このようにして、負荷制御をボイラへの投入燃料で決
定し、圧力制御をタービンガバナ弁で行うことで、各種
燃料設定値に見合った負荷・圧力制御を行うことができ
る。In this manner, the load control is determined by the fuel input to the boiler, and the pressure control is performed by the turbine governor valve, so that the load and pressure control can be performed in accordance with various fuel set values.
発明の効果 本発明では低負荷時、主蒸気圧力を減圧し、効率運用
を狙う変圧運転において、負荷制御をボイラ側のボイラ
入熱量で決定し、圧力制御をタービンガバナで行う。Effect of the Invention In the present invention, when the load is low, the main steam pressure is reduced, and in the variable pressure operation aiming at efficient operation, the load control is determined by the heat input to the boiler, and the pressure control is performed by the turbine governor.
このためにマスタ燃料がない領域（運用）でも変圧運
転が可能になり、又、各種燃料設定値に見合った負荷・
圧力制御を行うので、発熱量の高い購入燃料を投入する
必要がなく経済性も向上する。As a result, variable pressure operation is possible even in an area where no master fuel is available (operation).
Since pressure control is performed, there is no need to input purchased fuel having a high calorific value, and the economic efficiency is improved.
第１図は本発明によるボイラの変圧運転方法の説明図、
第２図は第１図に示される関数発生器11の関数図、第３
図は第１図に示される関数発生器12の関数図、第４図は
従来の変圧運転方法の一実施例を示す説明図、第５図は
第４図に示される関数発生器の関数図、第６図は従来の
変圧運転方法の別の実施例を示す説明図である。 10……カロリ補正、11,12……関数発生器、13……減算
器、14……調節器。FIG. 1 is an explanatory diagram of a boiler variable pressure operation method according to the present invention,
FIG. 2 is a function diagram of the function generator 11 shown in FIG.
FIG. 1 is a function diagram of the function generator 12 shown in FIG. 1, FIG. 4 is an explanatory diagram showing one embodiment of a conventional transformer operating method, and FIG. 5 is a function diagram of the function generator shown in FIG. FIG. 6 is an explanatory view showing another embodiment of the conventional transformer operating method. 10: Calorie correction, 11, 12: Function generator, 13: Subtractor, 14: Adjuster.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭56−136905（ＪＰ，Ｕ) 実開 平１−129501（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continued on the front page (56) References Japanese Utility Model Sho-56-136905 (JP, U) Japanese Utility Model Hei 1-129501 (JP, U)
Claims (1)
時に主蒸気圧力を減圧する変圧運転方法において、この
変圧運転でボイラ燃料を入力とする負荷の関数により負
荷デマンドを作成し、この負荷デマンドから変圧カーブ
を決定し、タービンガバナで圧力制御を行うことを特徴
とするボイラの変圧運転方法。In a variable pressure operation method for reducing the main steam pressure at a low load for efficient operation in a power generating boiler, a load demand is created by a function of a load inputting boiler fuel in the variable pressure operation. A transformer operating method for a boiler, comprising determining a transformer curve from a load demand and performing pressure control by a turbine governor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3174990A JP2634275B2 (en) | 1990-02-13 | 1990-02-13 | Transformer operation method of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3174990A JP2634275B2 (en) | 1990-02-13 | 1990-02-13 | Transformer operation method of boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03236501A JPH03236501A (en) | 1991-10-22 |
| JP2634275B2 true JP2634275B2 (en) | 1997-07-23 |
Family
ID=12339672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3174990A Expired - Lifetime JP2634275B2 (en) | 1990-02-13 | 1990-02-13 | Transformer operation method of boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2634275B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103791482B (en) * | 2014-01-22 | 2015-06-03 | 国家电网公司 | Thermal power generating unit hearth pressure segmentation control method |
-
1990
- 1990-02-13 JP JP3174990A patent/JP2634275B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03236501A (en) | 1991-10-22 |
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