JPS61285316A - Automatic combustion control device - Google Patents

Automatic combustion control device

Info

Publication number
JPS61285316A
JPS61285316A JP12631285A JP12631285A JPS61285316A JP S61285316 A JPS61285316 A JP S61285316A JP 12631285 A JP12631285 A JP 12631285A JP 12631285 A JP12631285 A JP 12631285A JP S61285316 A JPS61285316 A JP S61285316A
Authority
JP
Japan
Prior art keywords
flow rate
signal
air flow
air
simulated
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.)
Granted
Application number
JP12631285A
Other languages
Japanese (ja)
Other versions
JPH0627579B2 (en
Inventor
Hideo Yamamoto
英夫 山本
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.)
Mitsubishi Power Ltd
Original Assignee
Babcock Hitachi KK
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 Babcock Hitachi KK filed Critical Babcock Hitachi KK
Priority to JP60126312A priority Critical patent/JPH0627579B2/en
Publication of JPS61285316A publication Critical patent/JPS61285316A/en
Publication of JPH0627579B2 publication Critical patent/JPH0627579B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Regulation And Control Of Combustion (AREA)

Abstract

PURPOSE:To detect an abnormal combustion before it occurs, by obtaining a large simulated-air-flow signal or a small one from fuel flow control signal, comparing them with an air-flow control signal, thus judging whether there is any abnormal state. CONSTITUTION:A simulated air-flow transmitter 28 inputs large simulated-air- flow signals 29 and small simulated-air-flow signals 29 obtained from fuel-flow control signals 19, which are outputted by a fuel-flow control unit 17, into an air-flow operation part 30, while air-flow control signals 24 are inputted into the air-flow operational unit 30 as well, in which a comparison is made between the simulated air-flow signals 29 and the air-flow control signals 24. An abnormal signal 31 is outputted therefrom when the air-flow control signals 24 are larger than the large simulated-air-flow signals 29 or smaller than the small simulated-air-flow signals 29. In the arrangement as stated above, abnormal conditions can be detected prior to the occurence thereof.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本番jiffはボイラの自動燃焼制御装着に係り御粘に
燃焼状態の異常を検出することができるボイラの自動燃
焼制御装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The actual JIF relates to an automatic combustion control device for a boiler that is capable of easily detecting abnormalities in the combustion state in connection with the installation of automatic combustion control in a boiler.

〔発明の背景〕[Background of the invention]

第3図は、従来のボイラ自動燃焼制御装置における制御
系統図である。第3図において、ボイラ1から蒸気管2
を経て蒸気Sが負荷として図示されていないタービンへ
取出されるが、ボイラ1への燃料Fは燃料配管3、燃料
流量操作器4よりバーナ5を経てボイラ1の炉内に噴射
され燃焼される。この燃料配管3内の燃料流量は燃料流
量操作器4を開、閉することによって調節され、燃料流
量検出器5で燃料流量検出信号6として検出される。
FIG. 3 is a control system diagram in a conventional boiler automatic combustion control device. In Figure 3, from boiler 1 to steam pipe 2
The steam S is taken out as a load to a turbine (not shown), but the fuel F to the boiler 1 is injected into the furnace of the boiler 1 from the fuel pipe 3 and the fuel flow controller 4 through the burner 5 and burned. . The fuel flow rate in the fuel pipe 3 is adjusted by opening and closing the fuel flow controller 4, and is detected by the fuel flow detector 5 as a fuel flow detection signal 6.

一方、燃焼用空気Aは空気配管8より、風箱9を経てボ
イ−y1の炉内に供給され、燃焼空気Aは燃焼空気流量
操作器7を開、閉することによって流量が調節され、そ
の空気流量は燃焼空気流量検出器10の空気流量検出信
号11として検出される。
On the other hand, the combustion air A is supplied from the air pipe 8 through the wind box 9 into the furnace of the boiler y1, and the flow rate of the combustion air A is adjusted by opening and closing the combustion air flow rate controller 7. The air flow rate is detected as an air flow rate detection signal 11 of the combustion air flow rate detector 10.

他方、負荷検出信号の代表として蒸気管2の蒸気圧力が
蒸気圧力を検出器12で検出され、この蒸気圧力検出信
号13を蒸気圧力調節器14に入力し、この蒸気圧力調
節器14で蒸気圧力設定信号15と比較演算され、蒸気
圧力調節信号(負荷検出信号)16を燃料流量調節器1
7と信号加算演算器18に入力して燃料流量調節器17
では燃料流量検出器5からの燃料流量検出信号6と比較
され、この燃料流量調節信号191Cより燃料流量操作
器4を制御する。信号加算演算器18では、燃焼空気流
量検出器10からの空気流量検出信号11と、燃料流量
検出信号6に空燃比設定器頷で決められた必要空気量信
号21とが燃焼空気流量調節器nで比較演算され空気流
量偏差信号ると蒸気圧力調節信号16が加算され、空気
流量調節信号スで燃焼空気流量操作器7を開、閉して空
気量を制御する。
On the other hand, the steam pressure in the steam pipe 2 is detected by the detector 12 as a representative of the load detection signal, and this steam pressure detection signal 13 is input to the steam pressure regulator 14, which adjusts the steam pressure. The steam pressure adjustment signal (load detection signal) 16 is compared with the setting signal 15 and sent to the fuel flow controller 1.
7 and the signal addition calculator 18 to input the fuel flow rate regulator 17.
Then, it is compared with the fuel flow rate detection signal 6 from the fuel flow rate detector 5, and the fuel flow rate controller 4 is controlled based on this fuel flow rate adjustment signal 191C. In the signal addition calculator 18, the air flow rate detection signal 11 from the combustion air flow rate detector 10 and the required air amount signal 21 determined by the air-fuel ratio setting device nod to the fuel flow rate detection signal 6 are added to the combustion air flow rate controller n. The air flow rate deviation signal and the steam pressure adjustment signal 16 are added together, and the air flow rate adjustment signal opens and closes the combustion air flow rate controller 7 to control the air amount.

この様に蒸気圧力調節器14、燃料流量調節器17およ
び燃焼空気流量調節器17も、制御系が正常に働いてい
れば問題ないが、例えば、燃焼空気流量検出器10の検
出配管5がごみなどで詰った場合、空気流量検出信号1
1は、実際の空気流量が少ないにもかかわらず、大きい
空気流量検出信号11のまへとなり、一方燃料量は負荷
に見合って実際の空気流量と同様に低いから必要空気流
量信号2rも低くなり、燃焼空気流量調節器nは必要空
気流量信号21に比べ空気流量検出信号11が大きい為
、空気量を減少するように空気流量偏差信号あを低くし
続け、燃焼空気流量操作器7は極端に空気量を減らすよ
うに動作する。その結果、ボイラl内は空気量不足によ
って燃焼不良となり、黒煙の発生。
In this way, there is no problem with the steam pressure regulator 14, fuel flow regulator 17, and combustion air flow regulator 17 if the control systems are working normally, but for example, if the detection pipe 5 of the combustion air flow detector 10 is If it is clogged with air flow detection signal 1
1, the air flow rate detection signal 11 remains large despite the fact that the actual air flow rate is small.On the other hand, since the fuel amount is as low as the actual air flow rate in proportion to the load, the required air flow rate signal 2r is also low. Since the air flow rate detection signal 11 is larger than the required air flow rate signal 21, the combustion air flow rate controller n continues to lower the air flow rate deviation signal a to reduce the air amount, and the combustion air flow rate controller 7 It works to reduce the amount of air. As a result, poor combustion occurred in the boiler L due to insufficient air volume, and black smoke was generated.

失火事故に至ることになる。同様に燃料流量検出器5が
スティックして、実際流量よりも低い燃料流量検出信号
6を出すこともよくある現象で、この場合も燃料流量調
節器17で蒸気圧力調整信号16と比較し、燃料流量検
出信号6は低い為、燃料流量調節信号19は増加し続け
、燃料流量操作器4は流量を増すように操作される。そ
の結果、ボイラl内では空気量不足、燃焼不良となり、
黒煙の発生、失火事故に至ることになる。この様な黒煙
発生は燃焼排ガスGを監視する煤煙検出器四で検出する
ことができ、失火は火炎検出器nで検出することが可能
である。しかしながらこれらの検出器26.27は、不
良発生の結果、起った現象を検出するものであり公害問
題である黒煙発生を起す前に黒煙発生の異常を検出した
り、失火事故を起す前に失火発生の異常を検出すること
はできない。
This will lead to a misfire accident. Similarly, it is a common phenomenon that the fuel flow rate detector 5 sticks and outputs a fuel flow rate detection signal 6 that is lower than the actual flow rate. Since the flow detection signal 6 is low, the fuel flow adjustment signal 19 continues to increase and the fuel flow manipulator 4 is operated to increase the flow. As a result, the amount of air in the boiler L is insufficient, resulting in poor combustion.
This will result in the generation of black smoke and misfire accidents. The generation of such black smoke can be detected by a soot detector 4 that monitors the combustion exhaust gas G, and misfire can be detected by a flame detector n. However, these detectors 26 and 27 are designed to detect phenomena that occur as a result of defects, and can detect abnormalities in black smoke generation before they cause black smoke generation, which is a pollution problem, or cause misfire accidents. It is not possible to detect an abnormality before a misfire occurs.

〔発明の目的〕[Purpose of the invention]

本発明はかかる従来の欠点を解消しようとするもので、
その目的とするところは、黒煙発生以前、あるいは失火
発生以前にこれらの異常発生を検出することができるボ
イラの自動燃焼制御装置を提供するものである。
The present invention aims to eliminate such conventional drawbacks,
The purpose is to provide an automatic boiler combustion control device that can detect the occurrence of these abnormalities before black smoke or misfire occurs.

〔発明の概要〕[Summary of the invention]

本発明は前述の目的を達成するためK、本発明は燃料流
量調節信号から大きい模擬空気流量信号と小さい模擬空
気流量信号を発信する模擬空気流量発信器と、この模擬
空気流量信号と空気流量調節信号を比較する空気流量演
算器を設け、模擬空気流量信号と空気流量調節信号との
比較の結果、大きい模擬空気流量信号よりも空気流量調
節信号が大きい場合と、小さい模擬空気流量信号よりも
空気流量調節信号が小さい場合に異常信号を発生するよ
うにしたものである。
To achieve the above-mentioned objects, the present invention provides a simulated air flow rate transmitter that transmits a large simulated air flow rate signal and a small simulated air flow rate signal from a fuel flow rate adjustment signal, and the simulated air flow rate signal and air flow rate adjustment. An air flow rate calculator is provided to compare the signals, and as a result of comparing the simulated air flow rate signal and the air flow rate adjustment signal, the air flow rate adjustment signal is larger than the large simulated air flow rate signal, and the air flow rate control signal is larger than the small simulated air flow rate signal. An abnormal signal is generated when the flow rate adjustment signal is small.

〔実施例〕〔Example〕

以下、本発明の実施例を図面を用いて説明する。 Embodiments of the present invention will be described below with reference to the drawings.

第1図は本発明の実施例に係るボイラの自動燃焼制御装
置の系統図、第2図は燃料流量調節信号からの模擬空気
流量(74号と空気流it調節信号の関係を示す特性曲
線図である。
FIG. 1 is a system diagram of an automatic combustion control system for a boiler according to an embodiment of the present invention, and FIG. 2 is a characteristic curve diagram showing the relationship between a simulated air flow rate (No. 74) and an air flow IT adjustment signal from a fuel flow rate adjustment signal. It is.

第1図において、符号1から冴は従来のものと同一のも
のを示す。
In FIG. 1, numerals 1 to 5 indicate the same parts as the conventional ones.

田は燃料流量調節信号19から大きい模擬空気流量信号
と小さい模擬空気流量信号を発信する模擬空気流量発信
器、四は模擬流量信号、30i11:模擬空気流量信号
器と空気流量調節信号めを比較する空気流量演算器、3
1は大きい模擬空気流量信号32よりも大きいか、ある
いは小さい模擬空気流量信号33よりも小さい場合に出
力される異常信号である。
3 is a simulated air flow rate transmitter that transmits a large simulated air flow rate signal and a small simulated air flow rate signal from the fuel flow rate adjustment signal 19, 4 is a simulated flow rate signal, 30i11 is a comparison between the simulated air flow rate signal device and the air flow rate adjustment signal. Air flow calculator, 3
1 is an abnormal signal that is output when it is larger than the large simulated air flow rate signal 32 or smaller than the small simulated air flow rate signal 33.

この様な構造において、第3図の従来のボイラの自動燃
焼制御装置と異なる点は、燃料流量調節信号19に見合
った模擬空気流量信号29を発生する模擬空気流量信号
発信器路と、この模擬空気流量発信話路からの模擬空気
流量信号四と、空気流量調節信号部を比較する空気流量
演算器間を設け。
This structure differs from the conventional boiler automatic combustion control system shown in FIG. An air flow rate calculator is provided to compare the simulated air flow rate signal from the air flow rate transmission channel with the air flow rate adjustment signal section.

空気流it詞節信号寓が大きい模擬空気流量信号32よ
りも犬きbか、あるいは小さい模擬空気流量信号おより
も小さい場合には異常信号31を発するようにしたもの
である。
An abnormality signal 31 is generated when the air flow rate signal is larger than a large simulated air flow rate signal 32 or smaller than a small simulated air flow rate signal.

第2図に空気流量調節信号Uと大きい模擬空気流量信号
32、小さい模擬空気流量信号間の関係を示す。
FIG. 2 shows the relationship between the air flow rate adjustment signal U, the large simulated air flow rate signal 32, and the small simulated air flow rate signal.

つまり、実際の空気流量調節信号部が小さい模擬空気流
量信号およりも小さければ異常として空気量不足が検出
され異常信号31を発生する。
In other words, if the actual air flow rate adjustment signal section is smaller than the small simulated air flow rate signal, insufficient air amount is detected as an abnormality, and an abnormality signal 31 is generated.

逆に、空気流量検出信号為が大きい模擬空気流量信号3
2よりも大きければ空気量過剰が検出されやはり異常信
号31を発生させる。
Conversely, the simulated air flow rate signal 3 has a large air flow rate detection signal.
If it is larger than 2, an excess amount of air is detected and an abnormality signal 31 is also generated.

この様に本発明の自動燃焼制御装置は燃料量と空気量の
アンバランスを検出するのみでなく、試運転時等であら
かじめ把握した燃料流量調節信号19と空気流量調節信
号スの関係が(ずれたことをも検出することができるも
のである。これは、前述した如く、例えば、燃料流量検
出器5が不調の場合、燃料流量調節信号19が大きく変
化し、この燃料流量調節信号19と空気流量調節信号部
の関係がくずれても異常を検出することができる。同様
に図示していない押込通風機、燃料ポンプ、バーナ8が
異常の場合にもこれらの信号19.24の関係がくずれ
異常を検出することができる。なお、負荷変化時にはこ
れらの信号19.24の関係は当然くずれることになる
ので、その場合には異常信号31を発信しないようにす
る必要がある。
In this way, the automatic combustion control device of the present invention not only detects an imbalance between the amount of fuel and the amount of air, but also detects the relationship between the fuel flow rate adjustment signal 19 and the air flow rate adjustment signal, which are grasped in advance during test runs, etc. As mentioned above, this is because, for example, when the fuel flow rate detector 5 is malfunctioning, the fuel flow rate adjustment signal 19 changes greatly, and this fuel flow rate adjustment signal 19 and the air flow rate change. An abnormality can be detected even if the relationship between the adjustment signal sections breaks down.Similarly, if the forced draft fan, fuel pump, or burner 8 (not shown) is abnormal, the relationship between these signals 19 and 24 breaks down, and an abnormality can be detected. Note that when the load changes, the relationship between these signals 19 and 24 naturally collapses, so in that case it is necessary to prevent the abnormality signal 31 from being transmitted.

以上述べた様に燃料が複数の場合、又は、空気系統が複
数の場合も信号を加算して構成することにより第1図と
同様の異常が検出できる。なお、第1図のものは燃料流
量調節信号19に対して、空気流量検出信号必が正常か
異常かを判定するものであるが、逆に、空気流量調節信
号部に対して、燃料流量調節信号19が正常か異常かを
判定するものであってもよい。
As described above, even when there are multiple fuels or multiple air systems, the same abnormality as shown in FIG. 1 can be detected by adding up the signals. The one in FIG. 1 is for determining whether the air flow rate detection signal is normal or abnormal with respect to the fuel flow rate adjustment signal 19, but conversely, the fuel flow rate adjustment signal is determined for the air flow rate adjustment signal section. It may be determined whether the signal 19 is normal or abnormal.

本発明のボイラの自動燃焼制御装置では、従来の様に煤
煙検出器四や火炎検出器nの様に黒煙が発生してから、
あるいは火炎がなくなってからその異常を検出するもの
ではなく、発生以前から検出することができる。
In the boiler automatic combustion control device of the present invention, after black smoke is generated like soot detector 4 or flame detector n as in the conventional case,
Alternatively, instead of detecting an abnormality after the flame has disappeared, it can be detected before it occurs.

〔発明の効果〕〔Effect of the invention〕

本発明は燃料流量調節信号から大きい模擬空気流量信号
と小さい模擬空気流量信号を発信する模擬空気流量発信
器と、この模擬空気流量信号と空気流量調節信号を比較
する空気流量演算器を設け。
The present invention includes a simulated air flow rate transmitter that transmits a large simulated air flow rate signal and a small simulated air flow rate signal from a fuel flow rate adjustment signal, and an air flow rate calculator that compares the simulated air flow rate signal and the air flow rate adjustment signal.

模擬空気流量信号と空気流量調節信号との比較の結果、
大きい模擬空気流量信号よりも空気流量調節信号が大き
い場合と、小さい模擬空気流量信号よりも空気流量調節
信号が小さい場合に異常信号を発生するようにしたので
、黒煙発生以前、失火発生以前にこれらの異常を検出す
ることができる。
As a result of the comparison between the simulated air flow signal and the air flow adjustment signal,
An abnormal signal is generated when the air flow rate adjustment signal is larger than the large simulated air flow rate signal, and when the air flow rate adjustment signal is smaller than the small simulated air flow rate signal, so the error signal is generated before black smoke occurs or before a misfire occurs. These anomalies can be detected.

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

第1図は本発明の実施例に係る自動燃焼制御装置の系統
図、第2図は燃料流量調節信号からの模擬空気流量信号
と空気流量検出信号の関係を示す特性曲線図、第3図は
従来のボイラの自動燃焼制御装置の系統図である。 3・・・・・・燃料配管、4・・・・・・燃料流量操作
器、6・・・・・・燃料流量検出信号、7・・・・・・
空気流量操作器、8・・・・・・空気配管、11・・・
・・・空気流量検出信号、13・・・・・・負荷検出信
号、19・・・・・・燃料流量調節信号、ス・・・・・
・空気流量調節信号、四・・・・・・模擬空気流量発信
器、四・・・・・・模擬空気流量信号、蜀・・・・・・
空気流量演算器、31・・・・・・異常信号。 代理人 弁理士 武 順次部iH=’Jニー:1・・:
・′f 第1図 第2図 牒料涜量 tIlflイス号 第3図
FIG. 1 is a system diagram of an automatic combustion control device according to an embodiment of the present invention, FIG. 2 is a characteristic curve diagram showing the relationship between a simulated air flow rate signal from a fuel flow rate adjustment signal and an air flow rate detection signal, and FIG. FIG. 1 is a system diagram of a conventional boiler automatic combustion control device. 3...Fuel piping, 4...Fuel flow rate controller, 6...Fuel flow rate detection signal, 7...
Air flow rate controller, 8... Air piping, 11...
...Air flow rate detection signal, 13...Load detection signal, 19...Fuel flow rate adjustment signal, S...
・Air flow rate adjustment signal, 4... Simulated air flow rate transmitter, 4... Simulated air flow rate signal, Shu...
Air flow rate calculator, 31... Abnormal signal. Agent Patent Attorney Takeshi Junjibu iH='J knee: 1...:
・'f Figure 1 Figure 2 Amount of delinquent fee tIlfl Isu issue Figure 3

Claims (1)

【特許請求の範囲】[Claims] 燃料配管の燃料流量検出信号と、空気配管の空気流量検
出信号を検出し、この信号と負荷検出信号との偏差によ
り燃料流量操作器と空気流量操作器を制御するものにお
いて、前記燃料流量調節信号から大きい模擬空気流量信
号と小さい模擬空気流量信号を発信する模擬空気流量発
信器と、この模擬空気流量信号と空気流量調節信号を比
較する空気流量演算器を設け、模擬空気流量信号と空気
流量調節信号との比較の結果、大きい模擬空気流量信号
よりも空気流量調節信号が大きい場合と小さい模擬空気
流量信号よりも空気流量調節信号が小さい場合に異常信
号を発生するようにしたことを特徴とするボイラの自動
燃焼制御装置。
A fuel flow rate detection signal of a fuel pipe and an air flow rate detection signal of an air pipe are detected, and the fuel flow rate control device and the air flow rate control device are controlled based on the deviation between these signals and the load detection signal, wherein the fuel flow rate adjustment signal A simulated air flow rate transmitter that transmits a large simulated air flow rate signal and a small simulated air flow rate signal from the air flow rate signal, and an air flow rate calculator that compares the simulated air flow rate signal and the air flow rate adjustment signal are provided. As a result of comparison with the signal, an abnormal signal is generated when the air flow rate adjustment signal is larger than the large simulated air flow rate signal and when the air flow rate adjustment signal is smaller than the small simulated air flow rate signal. Boiler automatic combustion control device.
JP60126312A 1985-06-12 1985-06-12 Boiler automatic combustion controller Expired - Fee Related JPH0627579B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60126312A JPH0627579B2 (en) 1985-06-12 1985-06-12 Boiler automatic combustion controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60126312A JPH0627579B2 (en) 1985-06-12 1985-06-12 Boiler automatic combustion controller

Publications (2)

Publication Number Publication Date
JPS61285316A true JPS61285316A (en) 1986-12-16
JPH0627579B2 JPH0627579B2 (en) 1994-04-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP60126312A Expired - Fee Related JPH0627579B2 (en) 1985-06-12 1985-06-12 Boiler automatic combustion controller

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JP (1) JPH0627579B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63286616A (en) * 1987-05-18 1988-11-24 Matsushita Electric Ind Co Ltd Safety device for warm-air room heater

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6014973A (en) * 1983-07-06 1985-01-25 山本 惣一 Swinging type grain sorting apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6014973A (en) * 1983-07-06 1985-01-25 山本 惣一 Swinging type grain sorting apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63286616A (en) * 1987-05-18 1988-11-24 Matsushita Electric Ind Co Ltd Safety device for warm-air room heater

Also Published As

Publication number Publication date
JPH0627579B2 (en) 1994-04-13

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