JPS638368B2 - - Google Patents
Info
- Publication number
- JPS638368B2 JPS638368B2 JP56163315A JP16331581A JPS638368B2 JP S638368 B2 JPS638368 B2 JP S638368B2 JP 56163315 A JP56163315 A JP 56163315A JP 16331581 A JP16331581 A JP 16331581A JP S638368 B2 JPS638368 B2 JP S638368B2
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- fuel
- output
- sent
- deviation
- 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
- 239000000446 fuel Substances 0.000 claims description 42
- 238000002485 combustion reaction Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000000034 method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
- F23N5/006—Systems for controlling combustion using detectors sensitive to combustion gas properties the detector being sensitive to oxygen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2223/00—Signal processing; Details thereof
- F23N2223/12—Integration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/02—Air or combustion gas valves or dampers
- F23N2235/06—Air or combustion gas valves or dampers at the air intake
-
- 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)
- Feeding And Controlling Fuel (AREA)
Description
【発明の詳細な説明】
本発明は燃料の変化により変動するカロリーを
補正する装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for correcting calorie fluctuations due to changes in fuel.
プラントの燃料制御においては、燃料の変化に
よるカロリー変動が大きいので、プラントが安定
した能力を出すにはカロリー補正が必要である。 In plant fuel control, calorie fluctuations due to changes in fuel are large, so calorie correction is necessary for the plant to provide stable performance.
従来のカロリー補正の方法を第１図により説明
すると、図中ａは燃料流量検出器、ｂは掛算器、
ｃは燃料の種類により係数を変える手動信号発生
器、ｄは比較演算器、ｆは調節計、であり、燃料
が変化すると燃料流量検出器ａで検出された流量
信号Q1は、手動信号発生器ｃで設定された、燃
料の種類により決まる係数Ｋと掛算器ｂにおいて
掛け合わされ、Q2＝KQ1として比較演算器ｄに
送られ、設定された燃料流量信号Q3と比較演算
器ｄで演算され、ΔQ＝Q3−Q2の偏差に応じ燃料
供給管に設けられた流量制御弁ｅを調整し、蒸気
発生量が同一である限り、燃料が変化しても該燃
料から得られるカロリーは同一になるようにして
いた。 The conventional calorie correction method will be explained with reference to Fig. 1. In the figure, a indicates a fuel flow rate detector, b indicates a multiplier,
C is a manual signal generator that changes coefficients depending on the type of fuel, d is a comparator, and f is a controller. When the fuel changes, the flow rate signal Q1 detected by fuel flow rate detector a is a manual signal generator. Multiplier b multiplies the coefficient K determined by the type of fuel set in device c, and sends it to comparator d as Q 2 =KQ 1 . The flow rate control valve e installed in the fuel supply pipe is adjusted according to the deviation of ΔQ = Q 3 - Q 2 , and as long as the amount of steam generated is the same, the calories obtained from the fuel change even if the fuel changes. were made to be the same.
しかし、斯かる従来装置では、カロリーが時々
刻々変化する場合、あるいはカロリーの値が容易
に得られない場合等には、係数の設定を連続して
行うのは困難である。又不適切な設定をした場合
には圧力制御用調節計、蒸気温度用調節計、排ガ
スO2用調節計等の出力信号が振り切り（飽和）
になつてしまい、蒸気圧力、蒸気温度、排ガス
O2濃度の修正が適切に行われないため、運転に
支障を来たすことが多かつた。 However, with such conventional devices, it is difficult to continuously set the coefficients when the calorie value changes from moment to moment or when the calorie value is not easily obtained. In addition, if inappropriate settings are made, the output signals of the pressure control controller, steam temperature controller, exhaust gas O 2 controller, etc. will be saturated (saturated).
steam pressure, steam temperature, exhaust gas
Operation was often disrupted because the O 2 concentration was not corrected properly.
本発明は燃料のカロリーが変動したとき蒸気圧
力、蒸気温度、排ガスO2濃度の修正を自動的に
行つて運転を円滑に行い得るようにすることを目
的としてなしたもので、燃料流量を検出する装置
と、検出された排ガスO2濃度と設定された排ガ
スO2濃度との偏差により検出された燃料流量を
補正する積分器と該積分器により補正された燃料
流量と設定された燃料流量の偏差を求める比較演
算器と、該比較演算器の偏差信号により燃料の流
量制御弁の開度を制御する装置とを設けたことを
特徴とするものである。 The present invention was made for the purpose of automatically correcting the steam pressure, steam temperature, and exhaust gas O 2 concentration when the calorie of the fuel fluctuates, thereby enabling smooth operation.The present invention detects the fuel flow rate. an integrator that corrects the detected fuel flow rate based on the deviation between the detected exhaust gas O 2 concentration and the set exhaust gas O 2 concentration; The present invention is characterized in that it is provided with a comparator for determining the deviation and a device for controlling the opening degree of the fuel flow rate control valve based on the deviation signal from the comparator.
以下、本発明の実施例を図面を参照しつつ説明
する。 Embodiments of the present invention will be described below with reference to the drawings.
図中は排ガスO2濃度制御回路で、１は排ガ
スO2濃度の検出器、２は後述の空気流量及び燃
焼指令についての設定器１７より送られてきた信
号からO2濃度出力指令を作る関数発生器、３は
検出器１及び関数発生器２から送られてきた出力
を比較演算する比較演算器、４は比較演算器３と
接続された積分器、５はボイラ負荷に応じた空気
流量及び燃料流量についての燃焼指令を設定する
設定器１７から送られてきた出力と積分器４から
送られてきた出力を加える加算器である。 The figure shows an exhaust gas O 2 concentration control circuit, where 1 is a detector for exhaust gas O 2 concentration, and 2 is a function that creates an O 2 concentration output command from a signal sent from a setting device 17 for air flow rate and combustion command, which will be described later. 3 is a comparison calculator that compares and calculates the outputs sent from the detector 1 and the function generator 2; 4 is an integrator connected to the comparison calculator 3; 5 is an air flow rate according to the boiler load; This is an adder that adds the output sent from the setting device 17 that sets the combustion command regarding the fuel flow rate and the output sent from the integrator 4.
又は空気流量制御回路で、６は空気流量の検
出器、７は該検出器６からの出力と前記加算器５
よりの出力を比較演算する比較演算器、８は比較
演算器７より送られてきた出力の調節計、９は調
節計８から送られてきた出力により駆動され、ダ
ンパ開度を出力の大きさに比例するよう制御する
ダンパ駆動装置である。 Or an air flow rate control circuit, 6 is an air flow rate detector, 7 is an output from the detector 6 and the adder 5.
8 is a controller for the output sent from the comparison calculator 7, 9 is driven by the output sent from the controller 8, and the damper opening is determined by the magnitude of the output. This is a damper drive device that controls the damper so that it is proportional to.
更には燃料流量制御回路で、１０は前記積分
器４よりの出力と該積分器４のレンジの1/2を設
定する設定器、１１は積分器４と接続された積分
器、１２は燃料流量の検出器、１３は該検出器１
２と積分器１１よりの出力を掛ける掛算器、１４
は該掛算器１３よりの出力及び前記設定器１７よ
りの出力を比較演算する比較演算器、１５は比較
演算器１４より送られてきた出力の調節計、１６
は調節計１５よりの出力の大きさに対応して制御
される流量制御弁である。 Further, it is a fuel flow rate control circuit, 10 is a setting device for setting the output from the integrator 4 and 1/2 of the range of the integrator 4, 11 is an integrator connected to the integrator 4, and 12 is a fuel flow rate. 13 is the detector 1
A multiplier for multiplying 2 by the output from the integrator 11, 14
15 is a comparator for comparing the output from the multiplier 13 and the output from the setting device 17; 15 is a controller for the output sent from the comparator 14; 16
is a flow control valve that is controlled in accordance with the magnitude of the output from the controller 15.
次に本発明の作用について説明する。 Next, the operation of the present invention will be explained.
関数発生器２にボイラの負荷に応じた排ガス
O2濃度を設定すると共に設定器１７には空気流
量及び燃料流量の燃焼指令を設定する。ボイラか
ら排出される排ガスO2濃度は検出器１により、
又空気流量は検出器６により、更に燃料流量は検
出器１２により、夫々検出され、排ガスO2濃度
の出力は比較演算器３に、又空気流量の出力は比
較演算器７に、更に燃料流量の出力は比較演算器
１４に夫々送られる。 Exhaust gas is sent to function generator 2 according to the boiler load.
In addition to setting the O 2 concentration, combustion commands for air flow rate and fuel flow rate are set in the setting device 17. The O 2 concentration of the exhaust gas discharged from the boiler is determined by detector 1.
The air flow rate is detected by the detector 6, the fuel flow rate is detected by the detector 12, and the output of the exhaust gas O 2 concentration is sent to the comparator 3, the output of the air flow rate is sent to the comparator 7, and the fuel flow rate is sent to the comparator 3. The outputs of are sent to the comparison calculator 14, respectively.
例えば、負荷も燃料の種類も変らない場合に
は、検出器１により検出され比較演算器３に送ら
れてきた出力と関数発生器２の出力の偏差は零で
あるから、比較演算器３からの出力は零であり積
分器４からの出力は一定である。従つて排ガス
O2濃度制御回路は作動せず、空気流量制御回
路、燃料流量制御回路では夫々独立して制御
が行われる。 For example, if neither the load nor the type of fuel changes, the deviation between the output detected by detector 1 and sent to comparator 3 and the output of function generator 2 is zero; The output from the integrator 4 is zero and the output from the integrator 4 is constant. Therefore exhaust gas
The O 2 concentration control circuit does not operate, and the air flow control circuit and fuel flow control circuit perform control independently.
すなわち、空気流量制御回路では、検出器６
で検出された空気流量と設定器１７に設定された
空気流量についての燃焼指令が比較演算器７で比
較演算され、その偏差が調節計８を経てダンパ駆
動装置９に送られてダンパ開度が偏差が零になる
よう制御される。 That is, in the air flow control circuit, the detector 6
The comparison calculation unit 7 compares and calculates the combustion command for the air flow rate detected by the air flow rate and the air flow rate set in the setting device 17, and the deviation is sent to the damper drive device 9 via the controller 8 to adjust the damper opening. The deviation is controlled to be zero.
一方、掛算器１３を経て比較演算器１４に送ら
れた燃料流量の検出器１２よりの出力と設定器１
７よりの燃料流量についての燃焼指令は比較演算
器１４で比較演算され、その偏差が調節計１５を
経て流量制御弁１６に送られ、弁の開度が偏差が
零になるように制御される。 On the other hand, the output from the fuel flow rate detector 12 sent to the comparison calculator 14 via the multiplier 13 and the setting device 1
The combustion commands regarding the fuel flow rate from 7 are compared and calculated by the comparator 14, and the deviation is sent to the flow rate control valve 16 via the controller 15, and the opening degree of the valve is controlled so that the deviation becomes zero. .
今、燃料の種類等が変化すると、燃料の単位流
量当りの発熱量が変るから、単なる燃料流量制御
では、ボイラ負荷に対応したカロリーを得ること
はできない。そこでこの場合には、次のような制
御を行う。 Now, if the type of fuel changes, the calorific value per unit flow rate of fuel changes, so it is not possible to obtain calories corresponding to the boiler load by simply controlling the fuel flow rate. Therefore, in this case, the following control is performed.
すなわち、燃料の種類が変ると、関数発生器２
で設定された排ガスO2濃度の出力指令と検出器
１で検出された排ガスO2濃度に偏差が生じる。
この偏差は比較演算器３で比較演算され、その出
力は、積分器４を経て加算器５及び積分器１１に
送られる。 That is, when the type of fuel changes, the function generator 2
A deviation occurs between the output command for the exhaust gas O 2 concentration set in and the exhaust gas O 2 concentration detected by the detector 1.
This deviation is compared and calculated by a comparison calculator 3, and its output is sent to an adder 5 and an integrator 11 via an integrator 4.
一方、設定器１７で設定された空気流量の燃焼
指令は加算器５に送られ、該加算器５で積分器４
から送られてきた出力と加えられ、該加えられた
値が設定値として比較演算器８に入力され、検出
器６で検出された空気流量の出力と該比較演算器
７で比較演算され、偏差が調節計８を通つてダン
パ駆動装置９に送られ、比較演算器７よりの偏差
が零となるようダンパ開度が制御される。 On the other hand, the combustion command for the air flow rate set by the setting device 17 is sent to the adder 5, and the adder 5 uses the integrator 4.
The added value is input to the comparator 8 as a set value, and is compared with the output of the air flow rate detected by the detector 6 in the comparator 7 to determine the deviation. is sent to the damper drive device 9 through the controller 8, and the damper opening degree is controlled so that the deviation from the comparator 7 becomes zero.
又、積分器４の出力と設定器１０で設定された
値との偏差は積分器１１に送られ積分器１１の出
力は掛算器１３に送られ、検出器１２で検出され
た燃料流量に係数が掛けられ、これが発熱量を補
正された検出信号として比較演算器１４に送ら
れ、設定器１７により設定された燃料流量の燃焼
指令と該比較演算器１４において比較演算され、
偏差が調節計１５を通つて流量制御弁１６に送ら
れ、偏差が零になるよう、すなわち、燃料が変つ
てもカロリーがボイラ負荷に対応したカロリーと
なるよう、弁の開度が制御される。 Further, the deviation between the output of the integrator 4 and the value set by the setting device 10 is sent to the integrator 11, and the output of the integrator 11 is sent to the multiplier 13, which adds a coefficient to the fuel flow rate detected by the detector 12. is multiplied by , and this is sent to the comparator 14 as a detection signal corrected for the calorific value, and is compared with the combustion command of the fuel flow rate set by the setting device 17 in the comparator 14,
The deviation is sent to the flow control valve 16 through the controller 15, and the opening degree of the valve is controlled so that the deviation becomes zero, that is, even if the fuel changes, the calorie corresponds to the boiler load. .
なお、本発明は前述の実施例に限定されるもの
ではなく、本発明の要旨を逸脱しない範囲内で
種々変更を加え得ることは勿論である。 It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.
本発明の燃料のカロリー補正装置は前述のごと
き構成であるから、燃料が変化しても蒸気圧力、
蒸気温度、排ガスO2％等の修正を自動的に行う
ことができ、従つて燃料のカロリーに関係なく負
荷に応じた運転を最適に行うことができる。 Since the fuel calorie correction device of the present invention has the above-described configuration, even if the fuel changes, the vapor pressure
Steam temperature, exhaust gas O 2 %, etc. can be automatically corrected, and therefore, operation can be performed optimally according to the load regardless of the calorie content of the fuel.
第１図は従来例の説明図、第２図は本発明の実
施例の説明図である。
図中、１は排ガスO2濃度の検出器、２は排ガ
スO2濃度を設定するための関数発生器、３は比
較演算器、４は積分器、５は加算器、１２は燃料
流量の検出器、１３は掛算器、１４は比較演算
器、１６は流量制御弁、１７は空気流量及び燃焼
指令についての設定器である。
FIG. 1 is an explanatory diagram of a conventional example, and FIG. 2 is an explanatory diagram of an embodiment of the present invention. In the figure, 1 is an exhaust gas O 2 concentration detector, 2 is a function generator for setting the exhaust gas O 2 concentration, 3 is a comparison calculator, 4 is an integrator, 5 is an adder, and 12 is a fuel flow rate detection 13 is a multiplier, 14 is a comparator, 16 is a flow control valve, and 17 is a setting device for the air flow rate and combustion command.
Claims (1)
スO2濃度と設定された排ガスO2濃度との偏差に
より検出された燃料流量を補正する積分器と、該
積分器により補正された燃料流量と設定された燃
料流量の偏差を求める比較演算器と、該比較演算
器の偏差信号により燃料の流量制御弁の開度を制
御する装置と、を設けたことを特徴とする燃料の
カロリー補正装置。1. A device for detecting the fuel flow rate, an integrator for correcting the detected fuel flow rate based on the deviation between the detected exhaust gas O 2 concentration and the set exhaust gas O 2 concentration, and the fuel flow rate corrected by the integrator. 1. A fuel calorie correction device comprising: a comparator for determining a deviation in a set fuel flow rate; and a device for controlling the opening degree of a fuel flow rate control valve based on a deviation signal from the comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56163315A JPS5864426A (en) | 1981-10-13 | 1981-10-13 | Fuel calorie correction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56163315A JPS5864426A (en) | 1981-10-13 | 1981-10-13 | Fuel calorie correction device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5864426A JPS5864426A (en) | 1983-04-16 |
| JPS638368B2 true JPS638368B2 (en) | 1988-02-22 |
Family
ID=15771493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56163315A Granted JPS5864426A (en) | 1981-10-13 | 1981-10-13 | Fuel calorie correction device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5864426A (en) |
-
1981
- 1981-10-13 JP JP56163315A patent/JPS5864426A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5864426A (en) | 1983-04-16 |
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