JPH04344019A - Combustion air controlling device - Google Patents
Combustion air controlling deviceInfo
- Publication number
- JPH04344019A JPH04344019A JP11648491A JP11648491A JPH04344019A JP H04344019 A JPH04344019 A JP H04344019A JP 11648491 A JP11648491 A JP 11648491A JP 11648491 A JP11648491 A JP 11648491A JP H04344019 A JPH04344019 A JP H04344019A
- Authority
- JP
- Japan
- Prior art keywords
- oxygen
- output
- polarity
- control
- circuit
- 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
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 23
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000001301 oxygen Substances 0.000 claims abstract description 49
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 49
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 20
- 239000007789 gas Substances 0.000 claims abstract description 8
- 238000009423 ventilation Methods 0.000 claims description 6
- 238000005273 aeration Methods 0.000 abstract 2
- 238000007599 discharging Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
Landscapes
- Regulation And Control Of Combustion (AREA)
- Control Of Non-Electrical Variables (AREA)
Abstract
Description
【０００１】［発明の目的］[Object of the invention]
【０００２】0002
【産業上の利用分野】本発明は加熱炉、ボイラーなどに
用いられる燃焼用空気制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion air control device used in heating furnaces, boilers, etc.
【０００３】0003
【従来の技術】従来の技術では酸素制御調節器からの出
力に対し、上段、下段個々の寄与率を設定し、空気過剰
率の補正を行っており、この場合酸素制御調節器の出力
が変化すると上下段の空気過剰が同時に変化しており、
フィードバック制御は実施していない。[Prior art] In the conventional technology, the contribution rate of each upper stage and lower stage is set for the output from the oxygen control regulator, and the excess air ratio is corrected. In this case, the output of the oxygen control regulator changes. Then, the excess air in the upper and lower stages changed simultaneously,
Feedback control was not implemented.
【０００４】0004
【発明が解決しようとする課題】従来の技術では排ガス
の流れは、下段から上段へと流れる為下段の残量酸素は
上段側で燃焼し、省エネ、燃焼効率の向上を実現する為
には下段酸素が上段で燃焼する事を想定して、下段＞上
段に空気過剰率を設定する必要がある。これは、寄与率
を設定する事で可能であるが、従来技術に於いては一定
の差で、追従する為、上段で発生した酸素は無駄な余剰
空気となり、焼燃効率を低下させる要因となっていた。[Problem to be solved by the invention] In the conventional technology, the flow of exhaust gas flows from the lower stage to the upper stage, so the remaining oxygen in the lower stage is burned on the upper stage side, and in order to save energy and improve combustion efficiency, it is necessary to Assuming that oxygen is combusted in the upper stage, it is necessary to set the excess air ratio between the lower stage and the upper stage. This can be done by setting the contribution rate, but in the conventional technology, it is followed by a certain difference, so the oxygen generated in the upper stage becomes wasted surplus air, which is a factor that reduces combustion efficiency. It had become.
【０００５】今回の発明では、出来るだけ余剰空気を少
なくし、燃焼効率を向上させ、安定した燃焼用空気制御
装置の提出が実現できる。[0005] According to the present invention, it is possible to reduce surplus air as much as possible, improve combustion efficiency, and provide a stable combustion air control device.
【０００６】［発明の構成］[Configuration of the invention]
【０００７】[0007]
【課題を解決するための手段】本発明は燃焼装置内の排
ガス中の残存酸素量を制御する酸素制御調節器と、この
酸素制御調節器から出力される制御出力変化量の極性を
判定する極性判定回路と、通風路上流側と通風路下流側
との残存酸素量差が予め定められた範囲にあるか否かを
判定する許容差内判定回路と、この許容差内判定回路の
許容差判定出力及び極性判定回路からの極性判定出力に
よって更新指令を出力する接続判定回路と、この接続判
定回路からの更新指令によって酸素制御調節器からの信
号を更新し保持する保持回路と、この保持回路からの出
力値によって酸素の補正乗算値を変化させる酸素補正乗
算回路と、この酸素補正乗算回路の出力信号によって空
気操作端の弁開閉制御を指令する空気流量調節計とを具
備してなる燃焼用空気制御装置である。[Means for Solving the Problems] The present invention provides an oxygen control regulator that controls the amount of oxygen remaining in exhaust gas in a combustion device, and a polarity controller that determines the polarity of the amount of change in control output output from the oxygen control regulator. A determination circuit, an within-tolerance determination circuit that determines whether the difference in residual oxygen amount between the upstream side of the ventilation path and the downstream side of the ventilation path is within a predetermined range, and a tolerance determination circuit for this within-tolerance determination circuit. A connection determination circuit that outputs an update command based on the polarity determination output from the output and polarity determination circuit, a holding circuit that updates and holds the signal from the oxygen control regulator based on the update command from this connection determination circuit, and a Combustion air comprising: an oxygen correction multiplier circuit that changes the oxygen correction multiplier value according to the output value of the oxygen correction multiplier circuit; and an air flow rate controller that commands valve opening/closing control of the air operating end based on the output signal of the oxygen correction multiplier circuit. It is a control device.
【０００８】[0008]
【作用】燃焼制御系の酸素制御に於いて、燃焼装置内の
排ガスの流れを計測し、上流側燃焼装置の残量酸素を下
流側燃焼装置で燃焼させ、総合の排ガス量を一定に保ち
、安定した燃焼を得る。[Operation] In the oxygen control of the combustion control system, the flow of exhaust gas in the combustion device is measured, the remaining amount of oxygen in the upstream combustion device is combusted in the downstream combustion device, and the overall amount of exhaust gas is kept constant. Obtain stable combustion.
【０００９】[0009]
【実施例】次に本発明の一実施例を説明する。図１は燃
焼装置内の排ガス中の残存酸素量を制御する酸素制御調
節器１と、酸素制御調節器１から出力される制御出力変
化量１ａの極性を判定する極性判定回路６と、通風路上
流側と通風路下流側との残存酸素量差が予め定められた
範囲にあるか否かを判定する許容差内判定回路７と、許
容差内判定回路７の許容差判定出力７ａ及び極性判定回
路６からの極性判定出力によって更新指令３ａ，５ａを
出力する接続判定回路３，５と、接続判定回路３，５か
らの更新指令３ａ，５ａによって酸素制御調節器１から
の信号を更新し保持する保持回路２，４と、この保持回
路２，４からの出力値によって酸素の補正乗算値を変化
させる酸素補正乗算回路９，１１と、酸素補正乗算回路
９，１１の出力信号によって空気操作端１４，１５の弁
開閉制御を指令する空気流量調節計１２，１３とを具備
してなる燃焼用空気制御装置を示している。[Embodiment] Next, an embodiment of the present invention will be described. FIG. 1 shows an oxygen control regulator 1 that controls the amount of residual oxygen in exhaust gas in a combustion device, a polarity determination circuit 6 that determines the polarity of a control output change amount 1a output from the oxygen control regulator 1, and a ventilation An within-tolerance determination circuit 7 that determines whether the residual oxygen amount difference between the flow side and the downstream side of the ventilation passage is within a predetermined range, and the tolerance determination output 7a and polarity determination of the within-tolerance determination circuit 7. The connection determination circuits 3 and 5 output update commands 3a and 5a based on the polarity determination output from the circuit 6, and the signal from the oxygen control regulator 1 is updated and held using the update commands 3a and 5a from the connection determination circuits 3 and 5. oxygen correction multiplication circuits 9 and 11 that change the oxygen correction multiplication value according to the output values from the holding circuits 2 and 4; 1 shows a combustion air control device comprising air flow rate controllers 12 and 13 for commanding valve opening/closing control of valves 14 and 15.
【００１０】即ち、本発明は酸素制御調節計１の出力極
性により、下流側、上流側の操作する場所を選択し、空
気過剰率Ｍ１，Ｍ２を変化させ、効率的な燃焼を得る事
を目的とするものであり酸素制御調節器１の制御出力変
化量が＋側（増）か−側（減）方向かを極性判定回路６
で判定し、＋側フラグ、−側フラグを出力し、又、許容
差内判定回路７にて上流側と下流側の差がある一定範囲
内であるか否かを判定し、接続判定回路へ出力する。That is, the present invention aims to obtain efficient combustion by selecting the downstream and upstream operating locations depending on the output polarity of the oxygen control regulator 1 and changing the excess air ratios M1 and M2. The polarity determination circuit 6 determines whether the amount of change in the control output of the oxygen control regulator 1 is on the + side (increase) or on the - side (decrease).
, and outputs a + side flag and a - side flag.Also, the within-tolerance judgment circuit 7 judges whether the difference between the upstream side and the downstream side is within a certain range, and sends it to the connection judgment circuit. Output.
【００１１】接続判定回路３，５に於いて極性判定回路
６よりの＋、−信号と許容差内判定回路出力７とから酸
素制御調節器１の出力を更新するか否かを判断し、保持
回路２，４に対し、更新指令を出力し、保持回路２，４
は、接続判定回路３，５の更新指令がＯＮの時、酸素制
御調節器１からの出力を受けデータを更新し、更新指令
がＯＦＦの時は前回データを保持し、空気流量調節計１
２，１３の設定値が保持される。但し、燃料流量が変化
した場合は燃料流量に見合った空気流量Ｘ（空気過剰率
Ｍ１又はＭ２）×（寄与率Ｋ１又はＫ２）×（前回酸素
出力）により変化する。The connection determination circuits 3 and 5 determine whether or not to update the output of the oxygen control regulator 1 based on the + and - signals from the polarity determination circuit 6 and the within-tolerance determination circuit output 7, and hold the output. An update command is output to circuits 2 and 4, and holding circuits 2 and 4
receives the output from the oxygen control regulator 1 and updates the data when the update commands of the connection judgment circuits 3 and 5 are ON, and retains the previous data when the update command is OFF, and updates the data with the air flow controller 1.
The set values of 2 and 13 are held. However, when the fuel flow rate changes, it changes by the air flow rate X (excess air ratio M1 or M2) x (contribution ratio K1 or K2) x (previous oxygen output) commensurate with the fuel flow rate.
【００１２】そして、図２及び図３の様に調節計出力が
増となった時は、許容範囲内であれば、下流側の空気流
量が増加する（上流は保持）。また下流側空気流量の増
加分だけで補正できなくなった場合は、下流側空気流量
は保持し、上流側が増加する。上流側が増加し上流／下
流の差が許容範囲内となった場合は再度上流側は保持し
、下流側が増加する。以後同様に下流側が先行増加し、
上流側が後より増加する動作を繰り返す。When the controller output increases as shown in FIGS. 2 and 3, the air flow rate on the downstream side increases (maintains on the upstream side) if it is within the allowable range. If it is no longer possible to correct the amount by increasing the downstream air flow rate, the downstream air flow rate is maintained and the upstream air flow rate is increased. If the upstream side increases and the upstream/downstream difference falls within the allowable range, the upstream side is held again and the downstream side increases. After that, the downstream side will increase first in the same way,
Repeat the operation in which the upstream side increases later.
【００１３】次に酸素調節計出力が減となった時は、許
容範囲内であれば、上流側が減少する（下流側は保持）
。上流側空気流量の減少分だけで補正できなくなった場
合は上流側空気流量は保持し、下流側が減少する。
下流側が減少し、上流／下流の差が許容範囲内となった
場合は再度下流側は保持し、上流側が減少する。以後同
様に上流側が先行減少し、下流側が後より減少する動作
を繰り返す。Next, when the oxygen controller output decreases, if it is within the allowable range, the upstream side will decrease (the downstream side will maintain)
. If the upstream air flow rate cannot be corrected solely by the decrease in the upstream air flow rate, the upstream air flow rate is maintained and the downstream air flow rate is decreased. If the downstream side decreases and the upstream/downstream difference falls within the allowable range, the downstream side is held again and the upstream side decreases. Thereafter, the same operation is repeated in which the upstream side decreases first and the downstream side decreases later.
【００１４】尚、図３においてＡは減少、Ｂは増加、Ｃ
は許容範囲外を示す。In FIG. 3, A decreases, B increases, and C
indicates outside the permissible range.
【００１５】[0015]
【発明の効果】本発明により燃焼装置内の残存酸素量を
少なくし、安定した焼燃が可能となる。[Effects of the Invention] According to the present invention, the amount of oxygen remaining in the combustion device is reduced, and stable combustion becomes possible.
【図１】 本発明の一実施例を示す燃焼用空気制御装
置の構成図である。FIG. 1 is a configuration diagram of a combustion air control device showing an embodiment of the present invention.
【図２】 図１の作図を示す説明図である。FIG. 2 is an explanatory diagram showing the drawing in FIG. 1.
１…酸素制御調節器 ２…保持回路 ３…接続判定回路 ６…極性判定回路 ７…許容差内判定回路 ９…酸素補正乗算回路 １２…空気流量調節計 1...Oxygen control regulator 2...Holding circuit 3...Connection judgment circuit 6...Polarity judgment circuit 7...Tolerance within tolerance judgment circuit 9...Oxygen correction multiplication circuit 12...Air flow rate controller
Claims (1)
する酸素制御調節器と、この酸素制御調節器から出力さ
れる制御出力変化量の極性を判定する極性判定回路と、
通風路上流側と通風路下流側との残存酸素量差が予め定
められた範囲にあるか否かを判定する許容差内判定回路
と、この許容差内判定回路の許容差判定出力及び前記極
性判定回路からの極性判定出力によって更新指令を出力
する接続判定回路と、この接続判定回路からの前記更新
指令によって前記酸素制御調節器からの信号を更新し保
持する保持回路と、この保持回路からの出力値によって
酸素の補正乗算値を変化させる酸素補正乗算回路と、こ
の酸素補正乗算回路の出力信号によって空気操作端の弁
開閉制御を指令する空気流量調節計とを具備してなる燃
焼用空気制御装置。1. An oxygen control regulator that controls the amount of oxygen remaining in exhaust gas in a combustion device; a polarity determination circuit that determines the polarity of a control output change amount output from the oxygen control regulator;
An within-tolerance determination circuit that determines whether the difference in residual oxygen amount between the upstream side of the ventilation path and the downstream side of the ventilation path is within a predetermined range, and the tolerance determination output of this within-tolerance determination circuit and the polarity. a connection determination circuit that outputs an update command based on the polarity determination output from the determination circuit; a holding circuit that updates and holds the signal from the oxygen control regulator in accordance with the update command from the connection determination circuit; Combustion air control comprising an oxygen correction multiplier circuit that changes an oxygen correction multiplier value based on an output value, and an air flow rate controller that commands valve opening/closing control of an air operating end based on the output signal of the oxygen correction multiplier circuit. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11648491A JP2941483B2 (en) | 1991-05-22 | 1991-05-22 | Combustion air control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11648491A JP2941483B2 (en) | 1991-05-22 | 1991-05-22 | Combustion air control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04344019A true JPH04344019A (en) | 1992-11-30 |
| JP2941483B2 JP2941483B2 (en) | 1999-08-25 |
Family
ID=14688257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11648491A Expired - Fee Related JP2941483B2 (en) | 1991-05-22 | 1991-05-22 | Combustion air control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2941483B2 (en) |
-
1991
- 1991-05-22 JP JP11648491A patent/JP2941483B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2941483B2 (en) | 1999-08-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |