JPS6152366B2 - - Google Patents
Info
- Publication number
- JPS6152366B2 JPS6152366B2 JP56195274A JP19527481A JPS6152366B2 JP S6152366 B2 JPS6152366 B2 JP S6152366B2 JP 56195274 A JP56195274 A JP 56195274A JP 19527481 A JP19527481 A JP 19527481A JP S6152366 B2 JPS6152366 B2 JP S6152366B2
- Authority
- JP
- Japan
- Prior art keywords
- air flow
- flow rate
- burner
- burners
- fuel
- 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
Links
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 239000000446 fuel Substances 0.000 description 24
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2233/00—Ventilators
- F23N2233/06—Ventilators at the air intake
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2237/00—Controlling
- F23N2237/02—Controlling two or more burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Description
【発明の詳細な説明】
本発明は、ボイラ及び各種炉のような複数のバ
ーナにて燃焼を行う火炉における燃焼用空気の流
量制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion air flow rate control device in a furnace that performs combustion using a plurality of burners, such as a boiler and various types of furnaces.
複数のバーナを備えたボイラ等において、従来
一般には、燃料の全供給量に対して空気の全体供
給量を調整しているのみであり、各バーナに対す
る空気供給量を各バーナ毎に調整するようなこと
は行われていなかつた。 Conventionally, in boilers equipped with multiple burners, the total amount of air supplied is only adjusted relative to the total amount of fuel supplied, and the amount of air supplied to each burner is adjusted for each burner. Nothing was being done.
しかし近年、燃料事情の問題から、ボイラ等の
燃料に微粉炭を単独或いは混合して用い、またそ
のために燃料事情に応じて燃料の切換えができる
ボイラ等が提案されるに至り、このようなボイラ
等において効率の良い燃焼を行わしめるために
は、燃料量及び燃料の種類に応じてそれに合つた
空気流量の制御を各バーナ毎に行う必要がある。 However, in recent years, due to fuel issues, boilers have been proposed that use pulverized coal as fuel for boilers, etc., either alone or in combination, and that allow the fuel to be switched depending on the fuel situation. In order to achieve efficient combustion in such systems, it is necessary to control the air flow rate for each burner in accordance with the amount and type of fuel.
本発明は、このような要望に鑑みてなしたもの
で、複数のバーナを備えた火炉において、全空気
流量を制御する回路を設けると共に、一部のバー
ナを除く夫々のバーナに空気流量のフイードバツ
ク制御を行わしめる制御回路を設け、前記フイー
ドバツク制御回路を備えたバーナにおける空気流
量の和と、前記全空気流量との空気流量差を前記
フイードバツク制御回路を有しないバーナに流す
ようにしたことを特徴とする火炉燃焼用空気流量
制御装置、に係るものである。 The present invention has been made in view of these demands, and includes a furnace equipped with a plurality of burners, which is equipped with a circuit that controls the total air flow rate, and also provides feedback of the air flow rate to each burner except for some burners. A control circuit is provided for controlling the burner, and the air flow difference between the sum of the air flow rates in the burners equipped with the feedback control circuit and the total air flow rate is caused to flow to the burners without the feedback control circuit. The present invention relates to a furnace combustion air flow rate control device.
以下本発明の実施例を図面を参照して説明す
る。 Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明の一例を示すもので、複数のバ
ーナ１ａ，１ｂ，１ｃを備えた火炉２において、
空気供給フアン３を備えた空気供給主管４を前記
バーナ数に対応するよう分岐してそのバーナ空気
管５ａ，５ｂ，５ｃにより前記バーナ１ａ，１
ｂ，１ｃの夫々に空気を供給するようにし、且つ
全空気流量指令信号６及び前記空気供給主管４に
設けた全空気流量発信器７からの信号を全空気流
量制御器８に導入して、該全空気流量制御器８か
らの信号により全空気流量調節装置９を介して前
記空気供給フアン３における空気取入ブレード１
０の調整を行い、全空気流量の制御を行うように
している。 FIG. 1 shows an example of the present invention, in which a furnace 2 equipped with a plurality of burners 1a, 1b, 1c,
The air supply main pipe 4 provided with the air supply fan 3 is branched to correspond to the number of burners, and the burner air pipes 5a, 5b, 5c are used to supply the burners 1a, 1.
b, 1c, and introduce the total air flow rate command signal 6 and the signal from the total air flow rate transmitter 7 provided in the air supply main pipe 4 to the total air flow rate controller 8, The air intake blades 1 in the air supply fan 3 are controlled by a signal from the total air flow controller 8 through the total air flow controller 9.
0 is adjusted to control the total air flow rate.
前記バーナ空気管５ａ，５ｂ，５ｃの夫々に
は、バーナ空気流量発信器１１ａ，１１ｂ，１１
ｃとバーナ空気流量調節装置１２ａ，１２ｂ，１
２ｃを介して作動するバーナ空気流量調節ダンパ
１３ａ，１３ｂ，１３ｃを設け、前記１１ｂと１
２ｂの間及び１１ｃと１２ｃの間を別々に設けた
バーナ空気流量制御器１４及び１５にて接続し、
フイードバツク回路を構成する。 Burner air flow rate transmitters 11a, 11b, 11 are installed in the burner air pipes 5a, 5b, 5c, respectively.
c and burner air flow rate regulators 12a, 12b, 1
Burner air flow regulating dampers 13a, 13b, 13c are provided which operate via the
2b and between 11c and 12c are connected by burner air flow rate controllers 14 and 15 provided separately,
Configure a feedback circuit.
また、前記全空気流量指令信号６を、各バーナ
１ａ，１ｂ，１ｃに対応して設けた掛算器１６
ａ，１６ｂ，１６ｃに導入し、更に該掛算器１６
ａ，１６ｂ，１６ｃには各バーナ１ａ，１ｂ，１
ｃの燃料流量信号１７ａ，１７ｂ，１７ｃを導入
する。燃料流量信号１７ａ，１７ｂ，１７ｃは、
第２図に示す如く各バーナ１ａ，１ｂ，１ｃに対
応して設けた割算器１８ａ，１８ｂ，１８ｃから
の信号であり、該割算器１８ａ，１８ｂ，１８ｃ
には、燃料主管１９に設けた全燃料流量発信器２
０からの信号２１、及び前記燃料主管１９から各
バーナ１ａ，１ｂ，１ｃに燃料を分岐するバーナ
燃料管２２ａ，２２ｂ，２２ｃに設けたバーナ燃
料発信器２３ａ，２３ｂ，２３ｃからの信号２４
ａ，２４ｂ，２４ｃが入力されている。 Further, the total air flow rate command signal 6 is converted into a multiplier 16 provided corresponding to each burner 1a, 1b, 1c.
a, 16b, 16c, and the multiplier 16
Each burner 1a, 1b, 1 is attached to a, 16b, 16c.
The fuel flow signals 17a, 17b, and 17c of c are introduced. The fuel flow signals 17a, 17b, 17c are
As shown in FIG. 2, these are signals from dividers 18a, 18b, 18c provided corresponding to each burner 1a, 1b, 1c, and the dividers 18a, 18b, 18c
, there is a total fuel flow rate transmitter 2 installed in the main fuel pipe 19.
0, and signals 24 from burner fuel transmitters 23a, 23b, 23c provided in burner fuel pipes 22a, 22b, 22c that branch fuel from the main fuel pipe 19 to each burner 1a, 1b, 1c.
a, 24b, and 24c are input.
更に、前記掛算器１６ｂ及び１６ｃからの制御
信号２５ｂ及び２５ｃを前記バーナ空気流量制御
器１４及び１５に入力すると共に、掛算器１６ａ
からの制御信号２５ａを関数発生器２６ａにより
必要な特性を持たせてバーナ空気流量調節装置１
２ａに入力するよう構成する。なお、前記全空気
流量指令信号６は、必要な全燃料流量に対応して
発せられるようになつている。 Furthermore, the control signals 25b and 25c from the multipliers 16b and 16c are input to the burner air flow rate controllers 14 and 15, and the multiplier 16a
The control signal 25a from
2a. Incidentally, the total air flow rate command signal 6 is designed to be issued in accordance with the required total fuel flow rate.
上記構成によれば、全空気流量は全燃料流量及
び燃料の種類に対応して発せられる全空気流量指
令信号により制御され、また各バーナ１ａ，１
ｂ，１ｃに供給される空気流量は各バーナ燃料流
量に基づく制御信号２５ａ，２５ｂ，２５ｃによ
り制御される。 According to the above configuration, the total air flow rate is controlled by the total air flow rate command signal issued in accordance with the total fuel flow rate and the type of fuel, and each burner 1a, 1
The air flow rates supplied to the burners b and 1c are controlled by control signals 25a, 25b and 25c based on the respective burner fuel flow rates.
複数のバーナ１ａ，１ｂ，１ｃに供給する燃料
流量に応じて各バーナ１ａ，１ｂ，１ｃに供給す
る空気流量を制御する場合、各バーナ１ａ，１
ｂ，１ｃに対する空気流量は通常フイードバツク
制御により所定の値に保つように制御している
が、各バーナ１ａ，１ｂ，１ｃに対する空気流量
をすべてフイードバツク制御にて制御するように
すると、全空気流量制御との間に不平衡が生じ、
そのために制御作動が不能になる事態が発生す
る。 When controlling the air flow rate supplied to each burner 1a, 1b, 1c according to the fuel flow rate supplied to a plurality of burners 1a, 1b, 1c, each burner 1a, 1
The air flow rate for each burner b, 1c is normally controlled to be kept at a predetermined value by feedback control, but if the air flow rate for each burner 1a, 1b, 1c is all controlled by feedback control, the total air flow rate control There is an imbalance between
As a result, a situation occurs in which the control operation becomes impossible.
これに対し、本発明においては前記した如く、
一部のバーナ１ａについては空気流量のフイード
バツク制御を行わず、制御信号２５ａを関数発生
器２６ａを介してバーナ空気流量調節装置１２ａ
に導いてバーナ空気流量調節ダンパ１３ａの調整
を行わせるようにしている。 On the other hand, in the present invention, as described above,
Feedback control of the air flow rate is not performed for some of the burners 1a, and the control signal 25a is sent to the burner air flow rate adjustment device 12a via the function generator 26a.
The burner air flow rate adjusting damper 13a is guided to adjust the burner air flow rate adjusting damper 13a.
これにより、バーナ空気流量発信器１１ｂ，１
１ｃからの信号がバーナ空気流量制御器１４，１
５に入力され、該制御器１４，１５からの信号に
よりバーナ空気流量調節装置１２ｂ，１２ｃを介
してバーナ空気流量調節ダンパ１３ｂ，１３ｃの
調整を行う回路、即ちフイードバツク制御回路を
備えているバーナ１ｂ，１ｃにおける空気流量の
和を、空気供給フアン３にて供給される全空気流
量から差し引いた残りが、前記バーナ１ａに供給
されることになる。即ち、各バーナの空気流量と
全空気流量の不平衡部分をバーナ１ａ部が吸収す
ることになる。 As a result, the burner air flow rate transmitter 11b, 1
The signal from 1c is the burner air flow controller 14,1
The burner 1b is equipped with a circuit that adjusts the burner air flow rate adjustment dampers 13b and 13c via the burner air flow rate adjustment devices 12b and 12c based on signals from the controllers 14 and 15, that is, a feedback control circuit. , 1c is subtracted from the total air flow rate supplied by the air supply fan 3, and the remainder is supplied to the burner 1a. That is, the burner 1a absorbs the unbalanced portion between the air flow rate of each burner and the total air flow rate.
従つて、各バーナにおける空気流量制御と全空
気流量制御との間に不平衡が発生することを完全
に防止し、安定した制御を行うことができる。 Therefore, it is possible to completely prevent imbalance between the air flow rate control in each burner and the total air flow rate control, and to perform stable control.
尚、前記空気流量のフイードバツク制御を行わ
ないバーナは、ボイラ等のように20〜30本設けら
れているうちの所要本数としたり、またバーナが
複数段に分けて配列されているときはその所要段
としても良い。尚このとき、前記フイードバツク
制御を行わないバーナは、被加熱部に対する影響
が最も少ない部分（例えば被加熱部から最も離れ
た位置）のバーナに適用するのが好ましい。また
本発明は、上記実施例にのみ限定されることな
く、本発明の要旨を逸脱しない範囲において種々
変更を加えることができることは勿論である。 In addition, for burners that do not perform feedback control of the air flow rate, the required number may be determined from the 20 to 30 burners installed in boilers, etc., or the required number when the burners are arranged in multiple stages. It can also be used as a stage. At this time, it is preferable that the burner that does not perform the feedback control is applied to a burner in a portion that has the least influence on the heated portion (for example, a position farthest from the heated portion). Furthermore, it goes without saying that the present invention is not limited only to the above-mentioned embodiments, and that various changes can be made without departing from the gist of the present invention.
上述したように本発明の火炉燃焼用空気流量制
御装置によれば、各バーナに対する空気流量を制
御するようにしているので、燃料流量及び燃料の
種類に応じて空気流量を各バーナ毎に制御して効
率の良い燃焼を行わしめることができ、更に、所
要のバーナの空気流量をフイードバツク制御を行
わずに燃料流量に基づく信号のみにて制御するよ
うにしていることにより、そのバーナにて各バー
ナにおける空気流量制御と全空気流量制御との間
におる不平衡を吸収して該不平衡の発生を完全に
防止し、安定した制御を可能にすると共に、空気
供給フアンの動力減を図ることができる、等の優
れた効果を奏し得る。 As described above, according to the furnace combustion air flow rate control device of the present invention, the air flow rate to each burner is controlled, so the air flow rate is controlled for each burner according to the fuel flow rate and the type of fuel. Furthermore, by controlling the required air flow rate of the burner only with a signal based on the fuel flow rate without performing feedback control, each burner can be It is possible to absorb the unbalance between the air flow rate control and the total air flow rate control, completely prevent the occurrence of the unbalance, enable stable control, and reduce the power of the air supply fan. It is possible to achieve excellent effects such as:
第１図は本発明の一実施例を示す説明図、第２
図は燃料流量信号の説明図である。
１ａ，１ｂ，１ｃはバーナ、２は火炉、３は空
気供給フアン、４は空気供給主管、５ａ，５ｂ，
５ｃはバーナ空気管、６は全空気流量指令信号、
７は全空気流量発信器、８は全空気流量制御器、
９は全空気流量調節装置、１０は空気取入ブレー
ド、１１ａ，１１ｂ，１１ｃはバーナ空気流量発
振器、１２ａ，１２ｂ，１２ｃはバーナ空気流量
調節装置、１３ａ，１３ｂ，１３ｃはバーナ空気
流量調節ダンパ、１４，１５はバーナ空気流量制
御器、１６ａ，１６ｂ，１６ｃは掛算器、１７
ａ，１７ｂ，１７ｃは燃料流量信号、２５ａ，２
５ｂ，２５ｃは制御信号、２６ａは関数発生器を
示す。
FIG. 1 is an explanatory diagram showing one embodiment of the present invention, and FIG.
The figure is an explanatory diagram of the fuel flow signal. 1a, 1b, 1c are burners, 2 is a furnace, 3 is an air supply fan, 4 is an air supply main pipe, 5a, 5b,
5c is the burner air pipe, 6 is the total air flow command signal,
7 is a total air flow rate transmitter, 8 is a total air flow rate controller,
9 is a total air flow rate adjustment device, 10 is an air intake blade, 11a, 11b, 11c is a burner air flow rate oscillator, 12a, 12b, 12c is a burner air flow rate adjustment device, 13a, 13b, 13c is a burner air flow rate adjustment damper, 14, 15 are burner air flow rate controllers, 16a, 16b, 16c are multipliers, 17
a, 17b, 17c are fuel flow signals, 25a, 2
5b and 25c are control signals, and 26a is a function generator.
Claims (1)
流量を制御する回路を設けると共に、一部のバー
ナを除く夫々のバーナに空気流量のフイードバツ
ク制御を行わしめる制御回路を設け、前記フイー
ドバツク制御回路を備えたバーナにおける空気流
量の和と前記全空気流量との空気流量差を前記フ
イードバツク制御回路を有しないバーナに流すよ
うにしたことを特徴とする火炉燃焼用空気流量制
御装置。1. In a furnace equipped with a plurality of burners, a circuit for controlling the total air flow rate is provided, and a control circuit is provided for performing feedback control of the air flow rate for each burner except for some burners, and the furnace is equipped with the feedback control circuit. An air flow rate control device for furnace combustion, characterized in that the air flow rate difference between the sum of the air flow rates in the burners and the total air flow rate is caused to flow to the burners not having the feedback control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56195274A JPS5896917A (en) | 1981-12-04 | 1981-12-04 | Combustion air flow rate controlling device for furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56195274A JPS5896917A (en) | 1981-12-04 | 1981-12-04 | Combustion air flow rate controlling device for furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5896917A JPS5896917A (en) | 1983-06-09 |
| JPS6152366B2 true JPS6152366B2 (en) | 1986-11-13 |
Family
ID=16338427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56195274A Granted JPS5896917A (en) | 1981-12-04 | 1981-12-04 | Combustion air flow rate controlling device for furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5896917A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6060550U (en) * | 1983-09-30 | 1985-04-26 | 株式会社ノーリツ | Combustion device with multiple combustion chambers |
| JPS618752U (en) * | 1984-05-18 | 1986-01-20 | 株式会社ノーリツ | Air amount control device for two-can combustor |
-
1981
- 1981-12-04 JP JP56195274A patent/JPS5896917A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5896917A (en) | 1983-06-09 |
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