JPS5896918A - Combustion air flow rate controlling device for furnace - Google Patents

Combustion air flow rate controlling device for furnace

Info

Publication number
JPS5896918A
JPS5896918A JP56195275A JP19527581A JPS5896918A JP S5896918 A JPS5896918 A JP S5896918A JP 56195275 A JP56195275 A JP 56195275A JP 19527581 A JP19527581 A JP 19527581A JP S5896918 A JPS5896918 A JP S5896918A
Authority
JP
Japan
Prior art keywords
flow rate
air flow
burner
damper
air
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.)
Pending
Application number
JP56195275A
Other languages
Japanese (ja)
Inventor
Junichi Kusunoki
楠 純一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHI Corp
Original Assignee
IHI Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IHI Corp filed Critical IHI Corp
Priority to JP56195275A priority Critical patent/JPS5896918A/en
Publication of JPS5896918A publication Critical patent/JPS5896918A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N3/00Regulating air supply or draught
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00Ventilators
    • F23N2233/06Ventilators at the air intake
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00Controlling
    • F23N2237/02Controlling two or more burners
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N5/00Systems for controlling combustion
    • F23N5/18Systems 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)

Abstract

PURPOSE:To contrive reduction of the driving power of an air supply fun by a method wherein a damper having maximum opening limit for the whole air flow rate is controlled in accordance with the opening angle of the damper including maintaining of an effective combustion by controlling the air flow rate for each burner in a furnace having plural burners. CONSTITUTION:A main air supply pipe 4 having an air supply fan 3 is branched to correspond burners 1a-1c. The branched pipes 5a-5c are provided with the adjusting dampers 8a-8c operated via the signal generators 6a-6c and the adjusting devices 7a-7c of the air flow rate of the each burner. The feed back circuit is composed by connecting the controllers 9a-9c between the each signal generator 6 and the each adjusting device 7. The control signals 12a-12c from the multipliers 10a-10c which is introduced the whole air flow rate control signal 11 is input to the controllers 9a-9c. The adjustment of the air intake blade 16 is performed by the damper opening angles A-C from the each controller 9a-9c via the high value selective processor 13, an adjuster 14 etc.

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絽重を調整して
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った。
Conventionally, in boilers equipped with multiple burners, the total supply weight of air is only adjusted for the total amount of fuel supplied, and the amount of air supplied to each burner is adjusted for each burner. No such thing had been 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
れに合っ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 burners, etc., 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、各バーナに対する空気
流量を各バーナの空気管に備えたバーナ空気流量調節ダ
ンパの開度を調節して制御する回路を設けると共に、前
記各ダンパのうち最大開度のダンパを選択する高選択演
算装置を設け、前記最大開度のダンパが所要の一定開度
に保持される如く全空気流量を制御する回路を構成した
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 provides a method for controlling the air flow rate for each burner by adjusting the opening degree of a burner air flow rate adjusting damper provided in the air pipe of each burner in a furnace equipped with a plurality of burners. A high selection calculation device is provided to select the damper with the maximum opening degree from among the dampers, and the total air flow rate is controlled so that the damper with the maximum opening degree is maintained at a predetermined constant opening degree. This invention relates to a furnace combustion air flow rate control device characterized by comprising a circuit that performs the following steps.

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.

図面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、
空気供給ファン(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(
5cL) (5b) (5C)により前記バーナ(iα
) (1b)(1c)の夫々に空気を供給するようにし
ている。
The drawing shows an example of the present invention, in which a plurality of burners (1a
) (1b) In the furnace (2) equipped with (1c),
The air supply main pipe (4) equipped with the air supply fan (3) is branched to correspond to the number of burners, and the burner air pipes (
5cL) (5b) (5C) causes the burner (iα
) Air is supplied to each of (1b) and (1c).

前記バーナ空気管(5α)(5b)(5c)の夫々には
、バーナ空気流量発信器(6α)(6b)(6c)と、
バーナ空気流量調節装置(7α) (7b) (7c)
を介して作動するバーナ空気流量調節ダンパ(8a) 
(8b) (8c)を設け、前記バーナ空気流量発信器
(6α)(6b)(6G)とバーナ空気流量調節装置(
7α)(7b) (7c)との間を夫々バーナ空気流量
制御器(9α) (9b) <96)を介して接続する
ことによりフィードバック回路を構成する。
Each of the burner air pipes (5α) (5b) (5c) includes a burner air flow rate transmitter (6α) (6b) (6c);
Burner air flow regulator (7α) (7b) (7c)
Burner air flow regulating damper (8a) operated via
(8b) (8c) are provided, and the burner air flow rate transmitter (6α) (6b) (6G) and the burner air flow rate adjustment device (
7α), (7b), and (7c) via burner air flow rate controllers (9α) (9b) <96), thereby forming a feedback circuit.

また、各バーナ(1(L) (1b) (1c)への燃
料流量の信号を導入する如くバーナに対応させて設けた
掛算器(1Da) (10b) (10c)に、全空気
流量指令信号αつを導入し、且つ前記掛算器(10i)
 (10b) (10c)からの制御信号(12(Z)
 (12b) (12c)を前記バーナ空気流量制御器
(9α) (9b) <9c)に入力するよう構成する
In addition, a total air flow rate command signal is input to a multiplier (1Da) (10b) (10c) provided corresponding to each burner so as to introduce a fuel flow rate signal to each burner (1(L) (1b) (1c)). α and the multiplier (10i)
(10b) Control signal from (10c) (12(Z)
(12b) (12c) is configured to be input to the burner air flow rate controller (9α) (9b) <9c).

更に、前記バーナ空気流量制御器(9+z) (9b)
 (9C)からのダンパ開度信号(5)(ト)(Qを高
選択演算装置03に導き、該高選択演算装置α]からの
信号によりブレード開度調節器α→及び全空気流量調節
装置Q0を介して前記空気供給ファン(3)における空
気取入ブレード(至)の調整を行う如く構成する。なお
、前記全空気流量指令信号αのは必要な全燃料流量及び
燃料の種類等に基づいて発せられる信号であり、また前
記高選択演算装置α■は、各バーナ(1α)(1b)(
1c)におけるダンパ(8G) (86) (8c)の
うち最も開度が太きいものを選択し、その最も開度の大
きいダンパの開度が例えば80%開度となるように、ブ
レード開度調節器α→、全空気流量調節装置Qの及び空
気取入ブレード(4)を介して全空気流量の制御を行う
ようにしたものである。
Furthermore, the burner air flow controller (9+z) (9b)
Damper opening signal (5) (g) from (9C) (Q is guided to high selection calculation device 03, and the high selection calculation device The air intake blade (to) in the air supply fan (3) is adjusted through Q0.The total air flow rate command signal α is determined based on the required total fuel flow rate, fuel type, etc. This signal is emitted from each burner (1α) (1b) (
Select the damper (8G) (86) (8c) in 1c) with the widest opening, and adjust the blade opening so that the damper with the largest opening is, for example, 80% opening. The total air flow rate is controlled via the regulator α→, the total air flow rate regulator Q, and the air intake blade (4).

次に作用を説明する。Next, the effect will be explained.

複数のバーナ(1α) (1b) (1c)に供給する
燃料流量に応じて各バーナ(1αH16)(1c)に供
給する空気流量を制御する場合、通常は各バーナ(1α
)(1b) (1c)に対する空気流量はフィードバッ
ク制御により所定の値に保つように制御し、また全空気
流量は独自の制御回路によりフィードバック制御するよ
うにしているため、各バーナ空気流量制御と全空気流量
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 (1αH16) (1c) according to the fuel flow rate supplied to a plurality of burners (1α) (1b) (1c), usually each burner (1α
) (1b) The air flow rate for (1c) is controlled to be kept at a predetermined value by feedback control, and the total air flow rate is feedback controlled by a unique control circuit, so each burner air flow rate control and the total air flow rate are An unbalance occurs between the air flow rate control and the air flow rate control, resulting in a situation where the control operation becomes impossible.

これに対し、本発明においては、バーナ空気流量制御器
(9cL)(9b) (9c)からのダンパ開度信号(
8)(ト)(Qを夫々高選択演算装置α場に導き、ダン
パ(8a) (8b) (8clのうち最も開度の大き
なもの(空気流量が最も太きいもの)を選択し、その最
も大きな開度を有するダンパの開度が例えば80%のと
きにその空気流量が目的量となるように空気取入ブレー
ド(ト)を調整して全空気流量を制御するようにしてい
る。
In contrast, in the present invention, the damper opening signal (
8) (G) (Introduce each Q to the α field of the high selection calculation device, select the damper (8a) (8b) (8cl) with the largest opening degree (the one with the largest air flow rate), and The total air flow rate is controlled by adjusting the air intake blade (g) so that the air flow rate reaches a target amount when the damper having a large opening degree is, for example, 80%.

このように、全空気流量の制御が最も大きな開度をもつ
ダンパの開度に基づいて制御されるため、各バーナの空
気流量制御と全空気流量制御との間にトラブルを生じる
ようなことがなく、しかも空気供給7アン(3)は常に
低負荷状態で駆動されるので、空気供給ファン(3)の
動力域も図ることができる。
In this way, since the total air flow rate is controlled based on the opening degree of the damper with the largest opening degree, troubles will not occur between the air flow rate control of each burner and the total air flow rate control. Moreover, since the air supply fan (3) is always driven under a low load condition, the power range of the air supply fan (3) can also be improved.

尚、本発明は上記実施例にのみ限定されるものではなく
、バーナの数に制限されないこと、最大開度のダンパが
80%開度となるように全空気流量を調整する場合につ
いて述べたが、80%開度に限定されることなく所要の
開度を選定し得ること、その他車発明の要旨を逸脱しな
い範囲内において種々変更を加え得るものである。
It should be noted that the present invention is not limited to the above embodiments, and is not limited to the number of burners, and the case where the total air flow rate is adjusted so that the maximum opening of the damper is 80% has been described. , the desired opening degree can be selected without being limited to the 80% opening degree, and various other changes can be made without departing from the gist of the vehicle invention.

上述した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、全空気流量を最も大きな開度をもつダンパの開度に
基づいて制御されるため、各バーナの空気流量制御と全
空気流量制御との間にトラブルを生じるようなことがな
く、しかも空気供給ファンが常に低負荷状態で運転され
ることになって動力の減少も図ることができる、等の優
れた効果を奏し得る。
According to the air flow rate control device for furnace combustion of the present invention described above, 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 to improve efficiency. Since the total air flow rate is controlled based on the opening degree of the damper with the largest opening degree, trouble occurs between the air flow rate control of each burner and the total air flow rate control. This does not occur, and furthermore, the air supply fan is always operated in a low load state, so that it is possible to achieve excellent effects such as reducing power consumption.

【図面の簡単な説明】[Brief explanation of drawings]

図面は本発明の一実施例を示す説明図である。 (1α) (1b) (Ic)はバーナ、(2)は火炉
、(3)は空気供給ファン、(4)は空気供給主管、(
5α) (56) <5c)はバーナ空気管、(6α)
(6b)(6C)はバーナ空気流量発信器、(7α) 
(7b) (7c)はバーナ空気流量調節装置、(8α
) (86) (8c)は空気流量調節ダンパ、(9α
)(9b) (9c)はバーナ空気流量制御器、(10
α)(10b)(10c)は掛算器、αηは全空気流量
指令信号、(12α) (126) (12c)は制御
信号、α]は高選択演算装置、04)はブレード開度調
節器、00は全空気流量調節装置、(4)は空気取入ブ
レード、(5)(ロ)(Qはダンパ開度信号を示す。
The drawings are explanatory diagrams showing one embodiment of the present invention. (1α) (1b) (Ic) is the burner, (2) is the furnace, (3) is the air supply fan, (4) is the main air supply pipe, (
5α) (56) <5c) is the burner air pipe, (6α)
(6b) (6C) is the burner air flow transmitter, (7α)
(7b) (7c) is the burner air flow rate adjustment device, (8α
) (86) (8c) is an air flow rate adjustment damper, (9α
) (9b) (9c) is the burner air flow controller, (10
α) (10b) (10c) is a multiplier, αη is a total air flow rate command signal, (12α) (126) (12c) is a control signal, α] is a high selection calculation device, 04) is a blade opening regulator, 00 indicates the total air flow rate adjustment device, (4) indicates the air intake blade, and (5) (b) (Q indicates the damper opening signal.

Claims (1)

【特許請求の範囲】[Claims] 1)複数のバーナを備えた火炉において、各バーナに対
する空気流量を各バーナの空気管に備えたバーナ空気流
量調節ダンパの開度を調節して制御する回路を設けると
共に、前記各ダンパのうち最大開度のダンパを選択する
高選択演算装置を設け、前記最大開度のダンパが所要の
一定開度に保持される如く全空気流量を制御する回路を
構成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 is provided to control the air flow rate to each burner by adjusting the opening degree of a burner air flow rate regulating damper provided in the air pipe of each burner, and Furnace combustion air, characterized in that a highly selective calculation device for selecting a damper with an opening degree is provided, and a circuit is configured to control the total air flow rate so that the damper with the maximum opening degree is maintained at a required constant opening degree. Flow control device.
JP56195275A 1981-12-04 1981-12-04 Combustion air flow rate controlling device for furnace Pending JPS5896918A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56195275A JPS5896918A (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
JP56195275A JPS5896918A (en) 1981-12-04 1981-12-04 Combustion air flow rate controlling device for furnace

Publications (1)

Publication Number Publication Date
JPS5896918A true JPS5896918A (en) 1983-06-09

Family

ID=16338443

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56195275A Pending JPS5896918A (en) 1981-12-04 1981-12-04 Combustion air flow rate controlling device for furnace

Country Status (1)

Country Link
JP (1) JPS5896918A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60132555U (en) * 1984-02-15 1985-09-04 横河電機株式会社 Air pressure control device in combustion furnace
JPS6184343U (en) * 1984-11-06 1986-06-03
JPH04103910A (en) * 1990-04-12 1992-04-06 Rinnai Corp Forced air-supply, two kettle type water heater

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60132555U (en) * 1984-02-15 1985-09-04 横河電機株式会社 Air pressure control device in combustion furnace
JPS6184343U (en) * 1984-11-06 1986-06-03
JPH04103910A (en) * 1990-04-12 1992-04-06 Rinnai Corp Forced air-supply, two kettle type water heater

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