JPH07109292B2 - Control system for once-through boiler - Google Patents
Control system for once-through boilerInfo
- Publication number
- JPH07109292B2 JPH07109292B2 JP2220387A JP2220387A JPH07109292B2 JP H07109292 B2 JPH07109292 B2 JP H07109292B2 JP 2220387 A JP2220387 A JP 2220387A JP 2220387 A JP2220387 A JP 2220387A JP H07109292 B2 JPH07109292 B2 JP H07109292B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- air
- flow rate
- boiler
- water supply
- 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
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- 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、変圧および定圧貫流ボイラの協調制御方式に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coordinated control system for a transformer and a constant pressure once-through boiler.
従来の技術 従来の貫流ボイラの協調制御方式による制御回路を第２
図に示す。第２図において、符号１は発電量デマンド、
２は主蒸気圧力修正信号、３は加算器、４はボイラ入力
デマンド、５はボイラ入力制御モード時ボイラ入力増加
・減少ボタン、６はボイラ入力指令用メモリ、７はボイ
ラ入力指令、10は給水デマンド、11は関数発生器、12は
燃料流量指令、13は主蒸気温度修正信号、14は加算器、
23は燃料デマンド、24は関数発生器、25は空気流量指
令、26は排ガスO2修正信号、27は加算器、28は空気デマ
ンド、35は給水流量（ボイラ手動モード時の追従信
号）、38および39は信号切換器、40は給水流量／ボイラ
入力指令である。2. Description of the Related Art A conventional control circuit using a cooperative control system for a once-through boiler
Shown in the figure. In FIG. 2, reference numeral 1 is a power generation demand,
2 is a main steam pressure correction signal, 3 is an adder, 4 is a boiler input demand, 5 is a boiler input increase / decrease button in the boiler input control mode, 6 is a boiler input command memory, 7 is a boiler input command, and 10 is water supply. Demand, 11 is a function generator, 12 is a fuel flow rate command, 13 is a main steam temperature correction signal, 14 is an adder,
23 is a fuel demand, 24 is a function generator, 25 is an air flow rate command, 26 is an exhaust gas O 2 correction signal, 27 is an adder, 28 is an air demand, 35 is a water supply flow rate (following signal in boiler manual mode), 38 Reference numerals 39 and 39 are signal switches, and 40 is a feed water flow rate / boiler input command.
給水、燃料および空気の全てを自動とするボイラ協調制
御モードでは信号切換器38はボイラ入力デマンド４を選
択し、給水、燃料および空気のいずれかが手動の場合は
給水流量／ボイラ入力指令40を選択する。In the boiler cooperative control mode in which all of water supply, fuel and air are automatic, the signal switch 38 selects the boiler input demand 4, and when either water supply, fuel or air is manual, the water supply flow rate / boiler input command 40 is selected. select.
給水が手動となつた場合、信号切換器39が給水流量35を
選択するボイラ手動モードとし、燃料および空気を給水
流量値に追従させる。When the water supply is manual, the signal switch 39 is set to the boiler manual mode for selecting the water supply flow rate 35, and the fuel and air are made to follow the water supply flow rate value.
燃料が手動となつた場合は、信号切換器39がボイラ入力
指令７を選択するボイラ入力制御モードとし、給水流量
をボイラ入力指令値に追従させ、空気流量を燃料流量に
追従させる。When the fuel is manually operated, the signal switch 39 is set to the boiler input control mode in which the boiler input command 7 is selected, the feed water flow rate is made to follow the boiler input command value, and the air flow rate is made to follow the fuel flow rate.
空気が手動となつた場合は、燃料を手動にしてボイラ入
力制御モードとし、給水流量をボイラ入力指令値に追従
させるようにしている。When the air is manual, the fuel is manually set to the boiler input control mode so that the feed water flow rate follows the boiler input command value.
ここで、燃料または空気が手動となつた場合は、燃料ま
たは空気を手動操作することにより、ボイラ入力指令ま
たはボイラ入力指令および燃料を手動操作する必要があ
る。逆に、ボイラ入力指令を操作する場合は、燃料ある
いは燃料および空気をそれぞれ手動操作する必要があ
る。これは、発電量にみあつたボイラ入力とするため、
ボイラ入力指令を基準としているためである。Here, when the fuel or air is manual, it is necessary to manually operate the fuel or air to manually operate the boiler input command or the boiler input command and the fuel. Conversely, when operating the boiler input command, it is necessary to manually operate the fuel or the fuel and the air. Since this is a boiler input that matches the power generation amount,
This is because it is based on the boiler input command.
発明が解決しようとする問題点 上述のように、変圧および定圧貫流ボイラの協調制御に
おいて、従来は、給水、燃料および空気のいずれかが手
動となつた場合は、ボイラを整定させるために、ボイラ
入力指令、燃料、空気など、複数の手動操作が必要であ
る。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention As described above, in the coordinated control of the variable pressure and constant pressure once-through boilers, conventionally, when any of feed water, fuel and air is manual, the boiler is settled in order to settle the boiler. Multiple manual operations such as input commands, fuel, air etc. are required.
本発明は、給水、燃料および空気のいずれかが手動とな
つた場合に、複雑な操作を必要とせずに運転操作を簡単
にするような制御方式を提供することを目的とする。It is an object of the present invention to provide a control system that simplifies the driving operation without requiring a complicated operation when any one of water supply, fuel and air is manually operated.
問題点を解決するための手段 本発明によれば、変圧および定圧貫流ボイラの協調制御
において、給水、燃料および空気のいずれかを手動操作
にした場合に、手動にされた操作量に他の操作量を追従
させるようにしたことを特徴とする貫流ボイラの制御方
式が提供される。Means for Solving the Problems According to the present invention, in the coordinated control of the variable pressure and constant pressure once-through boiler, when any one of water supply, fuel and air is manually operated, other operation is performed in addition to the manually operated operation amount. There is provided a once-through boiler control method characterized in that the quantity is made to follow.
作用 給水が手動の場合は、従来どうりに、ボイラ手動モード
にして燃料／空気を給水流量に追従させ、このとき、水
燃比、空燃比が自動であれば、主蒸気温度、排ガスO2を
制御する。Operation When the water supply is manual, the boiler manual mode is set as in the conventional method, and the fuel / air is made to follow the water supply flow rate. At this time, if the water-fuel ratio and the air-fuel ratio are automatic, the main steam temperature and the exhaust gas O 2 are changed. Control.
燃料が手動の場合は、燃料追従モードとし、空気／給水
を燃料流量に追従させ、このとき水燃比、空燃比が自動
であれば、主蒸気温度（給水流量にて制御）、排ガスO2
を制御する。When the fuel is manual, the fuel follow-up mode is set, and the air / feed water follows the fuel flow rate. At this time, if the water-fuel ratio and the air-fuel ratio are automatic, the main steam temperature (controlled by the feed water flow rate), the exhaust gas O 2
To control.
空気が手動の場合は、空気追従モードとし、燃料を空気
に、給水を燃料に追従させ、このとき水燃比、空燃比が
自動であれば、主蒸気温度（給水流量で制御）、排ガス
O2（燃料流量で制御）を制御する。When the air is manual, the air following mode is set and the fuel follows the air and the feed water follows the fuel. If the water-fuel ratio and the air-fuel ratio are automatic at this time, the main steam temperature (controlled by the feed water flow rate), the exhaust gas
Controls O 2 (controlled by fuel flow rate).
実施例 第１図は本発明による制御方式の一実施例を示す制御回
路図である。Embodiment FIG. 1 is a control circuit diagram showing an embodiment of a control system according to the present invention.
発電量デマンド１は主蒸気圧力修正信号２と加算器３に
て加算されることにより、給水、燃料および空気の全て
を自動とするボイラ協調制御モード時のボイラ入力デマ
ンド４となる。The power generation demand 1 is added to the main steam pressure correction signal 2 by the adder 3 to become the boiler input demand 4 in the boiler cooperative control mode in which all of water supply, fuel and air are automatic.
ボイラ入力制御モード時ボイラ入力増加・減少ボタン５
はこれを押すことによりボイラ入力指令用メモリ６の値
を増加、減少させて、この出力にボイラ入力制御モード
時のボイラ入力指令７を与える。Boiler input increase / decrease button 5 in boiler input control mode
By pressing this, the value of the boiler input command memory 6 is increased or decreased, and the boiler input command 7 in the boiler input control mode is given to this output.
符号29は燃料流量を表す信号で、関数発生器30を通つて
その燃料流量に等価な給水流量に変換され、燃料流量み
あいの給水流量31となる。これに給水流量にて制御する
場合の主蒸気温度修正信号32が加算器33にて加えられ
て、燃料または空気が手動となつた場合の給水指令値で
ある燃料追従／空気追従給水指令信号34となる。Reference numeral 29 is a signal representing the fuel flow rate, which is converted into a feed water flow rate equivalent to the fuel flow rate through the function generator 30, and becomes a feed water flow rate 31 matching the fuel flow rate. A main steam temperature correction signal 32 for controlling the feed water flow rate is added to this by an adder 33, and a fuel follow-up / air follow-up water feed command signal 34 which is a water feed command value when fuel or air is manually operated. Becomes
信号切換器36は給水を手動とする場合のボイラ手動モー
ド時に追従信号として給水流量35を選択し、燃料または
空気を手動とする場合には給水指令信号34を選択して、
燃料追従／空気追従給水指令信号／給水流量37を出力す
る。The signal switch 36 selects the water supply flow rate 35 as a follow-up signal in the boiler manual mode when the water supply is manual, and selects the water supply command signal 34 when the fuel or air is manual,
The fuel follow-up / air follow-up water supply command signal / water supply flow rate 37 is output.
信号切換器８はボイラ入力制御モードの場合はボイラ入
力指令７を選択し、燃料または空気が手動の場合は燃料
追従／空気追従給水指令信号／給水流量37を選択してボ
イラ入力指令／燃料追従信号／空気追従信号９を出力す
る。The signal switch 8 selects the boiler input command 7 in the boiler input control mode, and selects the fuel follow-up / air follow-up water supply command signal / water supply flow rate 37 when the fuel or air is manual to select the boiler input command / fuel follow-up. The signal / air following signal 9 is output.
信号切換器38は給水、燃料および空気が全て自動の協調
制御モードにある時、ボイラ入力デマンド４を選択し、
給水、燃料および空気のいずれかが手動となつた場合、
あるいはボイラ入力制御モードの場合に信号切換器８の
出力を選択して給水デマンド10を出力する。この給水デ
マンド10は自動的には給水流量制御の設定信号となる。The signal switch 38 selects the boiler input demand 4 when the water supply, fuel and air are all in the automatic coordinated control mode,
If any of the water supply, fuel or air is manual,
Alternatively, in the boiler input control mode, the output of the signal switch 8 is selected and the water supply demand 10 is output. This water supply demand 10 automatically becomes a setting signal for water supply flow rate control.
関数発生器11は給水デマンド10を等価な燃料流量指令12
に変換し、加算器14にてその燃料流量指令12に主蒸気温
度修正信号（燃料にて制御する場合）を加えて燃料流量
指令12を補正した燃焼量指令信号15が作られる。The function generator 11 is a fuel flow rate command 12 equivalent to the water supply demand 10.
The fuel flow rate command 12 is added to the fuel flow rate command 12 by the adder 14 to add a main steam temperature correction signal (when controlled by fuel) to generate a combustion amount command signal 15 in which the fuel flow rate command 12 is corrected.
関数発生器17は空気流量信号16を受けて空気流量に等価
な燃料流量指令18に変換し、これに加算器20において燃
料にて制御する場合の排ガスO2修正信号19が加えられ、
燃料流量指令18を補正した空燃比信号21が作られる。The function generator 17 receives the air flow rate signal 16 and converts it into a fuel flow rate command 18 equivalent to the air flow rate, and an exhaust gas O 2 correction signal 19 for fuel control in the adder 20 is added to this.
An air-fuel ratio signal 21 is generated by correcting the fuel flow rate command 18.
信号切換器22は空気が自動の場合は燃焼量指令信号15を
選択し、空気が手動の場合は空燃比信号21を選択して燃
料デマンド23を出力する。この燃料デマンド23は自動時
には燃料流量制御の設定信号となる。The signal switch 22 selects the combustion amount command signal 15 when the air is automatic, and selects the air-fuel ratio signal 21 when the air is manual and outputs the fuel demand 23. This fuel demand 23 becomes a setting signal for fuel flow rate control when automatic.
関数発生器24は燃料デマンド23に等価な空気流量指令25
に変換する。Function generator 24 is an air flow command equivalent to fuel demand 23
Convert to.
加算器27は空気流量指令25と排ガスO2修正信号（空気で
制御する場合）26とを加算して空気流量指令25を補正し
た空気デマンド28を出力する。空気デマンド28は空燃比
信号であり、空気流量が自動の場合、空気流量制御の設
定信号となる。The adder 27 adds the air flow rate command 25 and the exhaust gas O 2 correction signal (when controlling with air) 26 and outputs an air demand 28 in which the air flow rate command 25 is corrected. The air demand 28 is an air-fuel ratio signal, and is an air flow rate control setting signal when the air flow rate is automatic.
上述のように、給水が手動の場合は従来どうりにボイラ
手動モードにして燃料／空気を給水流量35に追従させ、
燃料が手動の場合は燃料追従モードにして空気／給水を
燃料流量29に追従させ、空気が手動の場合は空気追従モ
ードにして給水を燃料に、燃料を空気に追従させるよう
にしている。As described above, when the water supply is manual, the boiler manual mode is set as in the conventional method so that the fuel / air follows the water supply flow rate 35.
When the fuel is manual, the fuel follow mode is set so that the air / water supply follows the fuel flow rate 29, and when the air is manual, the air follow mode is set so that the supplied water follows the fuel and the fuel follows the air.
発明の効果 本発明によれば、給水、燃料および空気のいずれかが手
動となつた場合、手動となつた操作量に他の操作量を追
従させるようにしたので、従来複数の手動操作が必要で
あつたものが１つの操作数で済み、これが運転操作を簡
単にし、ボイラ制御の安定性を保持するという効果を奏
している。EFFECTS OF THE INVENTION According to the present invention, when any one of water supply, fuel, and air is manually operated, another operation amount is made to follow the manually operated amount, so that a plurality of manual operations are conventionally required. This requires only one operation, which has the effect of simplifying the driving operation and maintaining the stability of the boiler control.
第１図は本発明方式の一実施例を示す制御回路図、第２
図は従来の方式による制御回路図である。 １……発電量デマンド、２……主蒸気圧力修正信号、3,
14,20,27,33……加算器、４……ボイラ入力デマンド、
５……ボイラ入力制御モード時ボイラ入力増加・減少ボ
タン、６……ボイラ入力指令用メモリ、７……ボイラ入
力指令、8,22,36,38……信号切換器、９……ボイラ入力
指令／燃料追従信号／空気追従信号、10……給水デマン
ド、11,17,24,30……関数発生器、12……燃料流量指令
（通常自動時、給水手動時）、13……主蒸気温度修正信
号（通常自動時、給水手動時）、15……燃焼量指令信
号、16……空気流量信号、18……燃料流量指令（空気手
動時）、19……排ガスO2修正信号（空気手動時）、21…
…空燃比信号（空気手動時）、23……燃料デマンド、25
……空気流量指令、26……排ガスO2修正信号、28……空
気デマンド、29……燃料流量、31……燃料流量みあいの
給水流量、32……主蒸気温度修正信号（燃料手動時、空
気手動時）、34……燃料追従／空気追従給水指令信号、
35……給水流量（ボイラ手動モード時の追従信号）、37
……燃料追従／空気追従給水指令信号／給水流量。FIG. 1 is a control circuit diagram showing an embodiment of the method of the present invention, and FIG.
The figure is a control circuit diagram according to a conventional method. 1 ... Generation demand, 2 ... Main steam pressure correction signal, 3,
14,20,27,33 …… Adder, 4 …… Boiler input demand,
5: Boiler input increase / decrease button in boiler input control mode, 6 ... Boiler input command memory, 7 ... Boiler input command, 8,22,36,38 ... Signal switch, 9 ... Boiler input command / Fuel follow-up signal / Air follow-up signal, 10 …… Water supply demand, 11,17,24,30 …… Function generator, 12 …… Fuel flow rate command (normally automatic, manual water supply), 13 …… Main steam temperature Correction signal (during normal automatic operation, manual water supply), 15 ... Combustion amount command signal, 16 ... Air flow rate signal, 18 ... Fuel flow rate command (when air is manual), 19 ... Exhaust gas O 2 correction signal (air manual operation) Hour), 21 ...
… Air-fuel ratio signal (when air is manually operated), 23 …… Fuel demand, 25
…… Air flow rate command, 26 …… Exhaust gas O 2 correction signal, 28 …… Air demand, 29 …… Fuel flow rate, 31 …… Fuel flow rate feed water flow rate, 32 …… Main steam temperature correction signal (when fuel is manually, Manual air), 34 ... Fuel follow / air follow water supply command signal,
35 …… Water supply flow rate (following signal in boiler manual mode), 37
...... Fuel-following / air-following water supply command signal / water supply flow rate.
Claims (1)
いて、給水、燃料および空気のいずれかを手動操作にし
た場合に、手動にされた操作量に他の操作量を追従させ
るようにしたことを特徴とする貫流ボイラの制御方式。1. In coordinated control of a transformer and a constant pressure once-through boiler, when any one of water supply, fuel and air is manually operated, another manually operated amount is made to follow another operated amount. The control method for the once-through boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2220387A JPH07109292B2 (en) | 1987-02-02 | 1987-02-02 | Control system for once-through boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2220387A JPH07109292B2 (en) | 1987-02-02 | 1987-02-02 | Control system for once-through boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63189703A JPS63189703A (en) | 1988-08-05 |
| JPH07109292B2 true JPH07109292B2 (en) | 1995-11-22 |
Family
ID=12076234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2220387A Expired - Lifetime JPH07109292B2 (en) | 1987-02-02 | 1987-02-02 | Control system for once-through boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07109292B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63290302A (en) * | 1987-05-22 | 1988-11-28 | 株式会社日立製作所 | Automatic controller for boiler plant |
| JPH02169902A (en) * | 1988-12-22 | 1990-06-29 | Babcock Hitachi Kk | Boiler steam temperature control device |
| JP4230337B2 (en) | 2003-11-13 | 2009-02-25 | 横浜ゴム株式会社 | Tire warning device and pneumatic tire |
-
1987
- 1987-02-02 JP JP2220387A patent/JPH07109292B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63189703A (en) | 1988-08-05 |
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