JPH05240422A - Combustion air flow rate controller - Google Patents
Combustion air flow rate controllerInfo
- Publication number
- JPH05240422A JPH05240422A JP4251592A JP4251592A JPH05240422A JP H05240422 A JPH05240422 A JP H05240422A JP 4251592 A JP4251592 A JP 4251592A JP 4251592 A JP4251592 A JP 4251592A JP H05240422 A JPH05240422 A JP H05240422A
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- air flow
- combustion air
- blower
- control
- 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
Links
Landscapes
- Regulation And Control Of Combustion (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は例えば鉄鋼産業における
炉設備やボイラ設備に必要な燃焼制御に用いられる燃焼
空気量制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion air amount control device used for combustion control required for furnace equipment and boiler equipment in the steel industry, for example.
【0002】[0002]
【従来の技術】例えば鉄鋼産業では、複数系統の設備に
対して燃焼空気を供給する場合、1台のブロアを可変電
圧可変周波数(VVVF)電源装置により回転数制御
し、ブロア吐出圧並びに各系統の燃焼空気流量を制御し
て炉設備やボイラ設備に必要な燃焼制御を行っている。
この場合、消費電力の節減を図ることを目的に各系統の
空気流量を監視し、その必要量に応じてブロア吐出圧の
設定値を変更する機能を持たせることにより、特に空気
流量が少ないときにブロアの回転数を抑えるようにして
いる。2. Description of the Related Art For example, in the steel industry, when supplying combustion air to a plurality of systems of equipment, one blower is controlled in rotation speed by a variable voltage variable frequency (VVVF) power supply device, blower discharge pressure and each system are controlled. Combustion control required for furnace equipment and boiler equipment is performed by controlling the flow rate of combustion air.
In this case, especially when the air flow rate is low, the function is to monitor the air flow rate of each system for the purpose of saving power consumption and change the set value of blower discharge pressure according to the required amount. The rotation speed of the blower is suppressed.
【0003】[0003]
【発明が解決しようとする課題】しかし、このような燃
焼空気流量制御装置では、空気流量制御とブロア吐出圧
制御が各々連続制御で行われているため、空気流量の目
標値が急変すると両制御系がそれぞれ制御偏差を縮める
方向に作用し、ついには両制御系が互いに干渉し合って
不安定な状態になるという問題があった。However, in such a combustion air flow rate control device, since the air flow rate control and the blower discharge pressure control are continuously controlled respectively, both control will be performed if the target value of the air flow rate changes suddenly. There was a problem that the systems act in a direction to reduce the control deviation, and finally both control systems interfere with each other and become unstable.
【0004】本発明は、空気流量の目標値が急変しても
空気流量制御系およびブロア吐出圧制御系を安定に機能
させることができる燃焼空気流量制御装置を提供するこ
とを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a combustion air flow rate control device capable of stably operating the air flow rate control system and the blower discharge pressure control system even if the target value of the air flow rate suddenly changes.
【0005】[0005]
【課題を解決するための手段】本発明は上記の目的を達
成するため、1台のブロアをVVVF電源装置により回
転数制御して複数設備の燃焼空気供給系統に供給される
空気流量を燃焼空気要求量に応じてそれぞれ設定される
目標値に基づいて制御する燃焼空気流量制御装置におい
て、前記各設備に要求される空気流量目標値の変化を検
出する変化検出手段と、この変化検出手段により空気流
量目標値の変化が検出されると前記ブロアの吐出圧の元
圧制御が一時的にホールドされるように制限するための
操作指令を前記VVVF電源装置に出力する吐出圧操作
手段とを備える。In order to achieve the above object, the present invention achieves the above object by controlling the rotation speed of one blower by a VVVF power supply device to control the flow rate of the air supplied to the combustion air supply system of a plurality of facilities. In a combustion air flow rate control device that controls based on target values that are respectively set in accordance with required amounts, change detection means that detects changes in the air flow rate target values required for each of the equipment, and air by the change detection means. And a discharge pressure operating means for outputting to the VVVF power supply device an operation command for limiting so that the original pressure control of the discharge pressure of the blower is temporarily held when a change in the target flow rate is detected.
【0006】[0006]
【作用】このような構成の燃焼空気流量制御装置にあっ
ては、変化検出手段により各設備に要求される空気流量
目標値の変化が検出されると、吐出圧操作手段よりVV
VF電源装置に与えられる操作指令により、ブロアの吐
出圧の元圧制御が一時的にホールドされるように制限さ
れるので、空気流量目標値の急変時に過渡的に生ずる空
気流量制御系とブロアの吐出圧制御系の干渉を防止する
ことが可能となり、両制御系統を安定に機能させること
ができる。In the combustion air flow rate control device having such a configuration, when the change detection means detects a change in the target air flow rate value required for each facility, the discharge pressure operating means causes VV to be applied.
The operation command given to the VF power supply device restricts the source pressure control of the blower discharge pressure to be temporarily held, so that the air flow rate control system and the blower that transiently occur when the air flow rate target value suddenly changes. The discharge pressure control system can be prevented from interfering with each other, and both control systems can function stably.
【0007】[0007]
【実施例】以下本発明の一実施例を図面を参照して説明
する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
【0008】図1は本発明による燃焼空気流量制御装置
の系統構成例を示すものである。図1において、1はV
VVF電源装置2により回転数制御される1台のブロア
で、このブロア1には図示しない炉設備やボイラに燃焼
空気を供給する複数の燃焼空気供給系統3a,3b,…
が接続されている。また、ブロア1の吐出側にブロア吐
出圧を検出する圧力検出器4が設けられ、各燃焼空気供
給系統3a,3b…には流量検出器5a,5b,…およ
び流量調節弁6a,6b,…がそれぞれ設けられてい
る。FIG. 1 shows a system configuration example of a combustion air flow rate control device according to the present invention. In FIG. 1, 1 is V
A plurality of combustion air supply systems 3a, 3b, ... for supplying combustion air to a furnace facility (not shown) or a boiler with a single blower whose rotation speed is controlled by the VVF power supply device 2.
Are connected. Further, a pressure detector 4 for detecting the blower discharge pressure is provided on the discharge side of the blower 1, and the flow rate detectors 5a, 5b, ... And the flow rate control valves 6a, 6b, ... Are provided in each of the combustion air supply systems 3a, 3b. Are provided respectively.
【0009】一方、7は各系統の炉設備やボイラー設備
の温度制御からの空気要求量に応じた設定値が各系統の
目標信号としてそれぞれ出力する燃焼制御部、8a,8
bは各系統の流量検出器5a,5b,…により検出され
た燃焼空気流量検出信号と燃焼制御部7より入力される
各系統に対応する目標信号とが入力され、各系統の燃焼
空気流量が目標値となるように流量調節弁6a.6b,
…の開度を調節して流量制御する流量調節計である。On the other hand, 7 is a combustion control section for outputting a set value corresponding to the air demand amount from the temperature control of the furnace equipment or boiler equipment of each system as a target signal of each system, 8a, 8
In b, the combustion air flow rate detection signal detected by the flow rate detectors 5a, 5b, ... Of each system and the target signal corresponding to each system input from the combustion control unit 7 are input, and the combustion air flow rate of each system is The flow rate control valve 6a. 6b,
It is a flow rate controller that controls the flow rate by adjusting the opening degree of.
【0010】また、9は燃焼制御部7より出力される各
系統に対応する設定値がそれぞれ入力され、これら設定
値の最大値を選択する最大値選択部、10はこの最大値
選択部9で選択された設定値を予め与えられた折線特性
に基づいて補正し、これを目標信号として出力する折線
処理部、11は圧力検出器4により検出されたブロア1
の吐出圧検出信号と折線処理部10より出力される目標
信号とが入力される圧力調節計である。Further, 9 is a set value corresponding to each system output from the combustion control section 7, and is a maximum value selecting section for selecting the maximum value of these setting values. 10 is a maximum value selecting section 9. A polygonal line processing unit 11 which corrects the selected set value based on a polygonal line characteristic given in advance and outputs this as a target signal. Reference numeral 11 denotes the blower 1 detected by the pressure detector 4.
Is a pressure controller to which the discharge pressure detection signal and the target signal output from the broken line processing unit 10 are input.
【0011】さらに、12は燃焼制御部7より出力され
る各系統に対応する目標信号がそれぞれ入力され、これ
ら各目標値の急変を検出すると保持要求判断処理に基づ
き保持要求信号を出力する目標値変化検出部、13は圧
力調節計11より入力される圧力制御信号に基づきVV
VF電源装置2に操作指令を与え、目標値変化検出部1
2より保持要求指令が入力されるとその保持要求に応じ
て出力処理し、VVVF電源装置2に対してブロア1の
吐出圧の元圧制御がホールドされるように制限すべく操
作指令を与える操作出力処理部である。次に上記のよう
に構成された燃焼空気流量制御装置の作用について述べ
る。Further, reference numeral 12 is a target value corresponding to each system output from the combustion control unit 7, and when a sudden change in each target value is detected, a target value for outputting a hold request signal based on a hold request determination process. The change detector, 13 is VV based on the pressure control signal input from the pressure controller 11.
An operation command is given to the VF power supply device 2, and the target value change detection unit 1
When a holding request command is input from 2, the output processing is performed according to the holding request, and an operation command is given to the VVVF power supply device 2 so as to limit the original pressure control of the discharge pressure of the blower 1 to be held. It is an output processing unit. Next, the operation of the combustion air flow rate control device configured as described above will be described.
【0012】いま、燃焼制御部7より出力される各系統
の空気要求量に応じた設定値が目標信号として流量調節
計8a,8b,…および最大値選択部9に入力されてい
るものとすれば、流量調節計8a,8b,…では各系統
の流量検出器5a,5b…により検出された空気流量検
出信号とを比較し、その偏差により流量調節弁6a,6
b,…の開度を調節し、各系統の燃焼空気流量がその系
統の目標値になるように制御する。Now, it is assumed that the set value output from the combustion control unit 7 according to the required air amount of each system is input as target signals to the flow rate controllers 8a, 8b, ... And the maximum value selection unit 9. For example, the flow rate controllers 8a, 8b, ... Compare the air flow rate detection signals detected by the flow rate detectors 5a, 5b, ...
The opening degrees of b, ... Are adjusted so that the combustion air flow rate of each system becomes the target value of that system.
【0013】また、最大値選択部9では各系統に対応す
る設定値の最大値を選択し、その選択された設定値が折
線処理部10に与えられる。この折線処理部10では、
ブロア性能等から決まるP−Q曲線に基づいて空気流量
の最大値の変化に応じた最適な元圧を決定し、これをブ
ロア1の吐出圧の設定信号として圧力調節計11に与え
る。この圧力調節計11では圧力検出器4により検出さ
れたブロア1の吐出圧検出信号と目標信号とを比較し、
その偏差に基づいてVVVF電源装置2にブロア1の吐
出圧を元圧制御するための操作指令を与える操作出力処
理部13に入力する。Further, the maximum value selection unit 9 selects the maximum value of the set values corresponding to each system, and the selected set value is given to the polygonal line processing unit 10. In this polygonal line processing unit 10,
Based on the PQ curve determined by the blower performance and the like, the optimum source pressure corresponding to the change in the maximum value of the air flow rate is determined, and this is given to the pressure controller 11 as a setting signal of the discharge pressure of the blower 1. In this pressure controller 11, the discharge pressure detection signal of the blower 1 detected by the pressure detector 4 is compared with the target signal,
It is input to the operation output processing unit 13 which gives an operation command for controlling the discharge pressure of the blower 1 to the source pressure to the VVVF power supply device 2 based on the deviation.
【0014】同時に燃焼制御部7より出力される各系統
に対応する設定値は、変化検出部12にも与えられ、こ
のとき設定値に変化がなく、操作出力処理部13に対し
て保持要求が出されていなければ、操作出力処理部13
は圧力調節計11より入力される偏差に基づいてVVV
F電源装置2に操作指令を与え、ブロア1の回転数を制
御してその吐出圧を制御する。また、変化検出部12に
より空気流量の目標値の急変が検出され、その変化率が
ある値以上になったと判断されると操作出力処理部13
に保持要求指令が出される。この操作出力処理部13で
は、その保持要求指令を受取ると、その時点からタイマ
秒間、VVVF電源装置2に対してブロア1の吐出圧の
元圧制御が一定時間ホールドされるように制限すべく操
作指令を与える。At the same time, the set value corresponding to each system output from the combustion control section 7 is also given to the change detection section 12, and there is no change in the set value at this time, and a hold request is issued to the operation output processing section 13. If not, the operation output processing unit 13
Is VVV based on the deviation input from the pressure controller 11.
An operation command is given to the F power supply device 2, the rotation speed of the blower 1 is controlled, and the discharge pressure thereof is controlled. Further, the change detection unit 12 detects a sudden change in the target value of the air flow rate, and when it is determined that the rate of change has exceeded a certain value, the operation output processing unit 13
A hold request command is issued to. When the operation output processing unit 13 receives the holding request command, the operation output processing unit 13 operates to limit the source pressure control of the discharge pressure of the blower 1 to the VVVF power supply device 2 for a predetermined time from the time when the holding request command is received. Give orders.
【0015】そして、各系統の燃焼空気流量の制御系と
ブロア1の吐出圧制御系の過渡応答時間が経過した後
は、ブロア1の吐出圧の元圧制御のホールドが解除さ
れ、元圧制御に戻される。After the transient response time of the combustion air flow rate control system of each system and the discharge pressure control system of the blower 1 has elapsed, the hold of the source pressure control of the discharge pressure of the blower 1 is released, and the source pressure control is performed. Returned to.
【0016】このように本実施例では、VVVF電源装
置2により回転数制御されるブロア1より複数の燃焼空
気供給系統3a,3b,…を通して炉設備やボイラー設
備にそれぞれ供給される燃焼空気の要求量に応じてそれ
ぞれ設定される燃焼制御部7の設定値に基づいて各系統
の燃焼空気量を流量調節計8a,8b,…により制御す
ると共に、これらの設定値の最大値を最大値選択部9に
より選択して折線処理部10で補正された設定信号に基
づいて圧力調節計11によりブロア1の吐出圧力の制御
量を求め、且つ燃焼制御部7の空気流量目標値の変化が
変化検出部12により検出されると圧力調節計11で求
められた吐出圧力の制御量を変化検出部12からの保持
要求に応じて出力処理する操作出力処理部13よりVV
VF電源装置2にブロア1の吐出圧の元圧制御が一時的
にホールドされるように制限するための操作指令を与え
るようにしたものである。As described above, in this embodiment, the demand for the combustion air supplied from the blower 1 whose rotation speed is controlled by the VVVF power supply device 2 to the furnace equipment and the boiler equipment through the plurality of combustion air supply systems 3a, 3b ,. The amount of combustion air in each system is controlled by the flow rate controllers 8a, 8b, ... Based on the set value of the combustion control unit 7 set according to the amount, and the maximum value of these set values is set to the maximum value selection unit. 9, the pressure controller 11 calculates the control amount of the discharge pressure of the blower 1 based on the setting signal corrected by the polygonal line processing unit 10, and the change of the air flow rate target value of the combustion control unit 7 is detected by the change detection unit. VV from the operation output processing unit 13 that outputs the control amount of the discharge pressure obtained by the pressure controller 11 when detected by 12 in accordance with the holding request from the change detection unit 12.
The VF power supply device 2 is provided with an operation command for limiting the original pressure control of the discharge pressure of the blower 1 to be temporarily held.
【0017】従って、各系統の空気流量制御における目
標値が急変しても、過渡応答時の吐出圧制御系と空気流
量制御系の両制御系における不安定要素が解消されるの
で、燃焼量の変わりやすい炉設備やボイラ設備等のプラ
ントの燃焼制御においても、安定した燃焼空気の供給が
可能となる。また、燃焼空気供給の安定化により、効率
的且つクリーンな燃焼が実現できる。なお、本発明は上
記し、且つ図面に示す実施例にのみ限定されるものでは
なく、その要旨を変更しない範囲内で種々変形して実施
できることは勿論である。Therefore, even if the target value in the air flow rate control of each system suddenly changes, the unstable elements in both the discharge pressure control system and the air flow rate control system at the time of transient response are eliminated. A stable supply of combustion air is possible even in combustion control of plants such as furnace equipment and boiler equipment, which change easily. Further, by stabilizing the supply of combustion air, efficient and clean combustion can be realized. The present invention is not limited to the embodiments described above and shown in the drawings, and it goes without saying that various modifications can be made without departing from the scope of the invention.
【0018】[0018]
【発明の効果】以上述べたように本発明によれば、空気
流量の目標値が急変しても空気流量制御系およびブロア
吐出圧制御系を安定に機能させることができる燃焼空気
流量制御装置を提供できる。As described above, according to the present invention, there is provided a combustion air flow rate control device capable of stably operating the air flow rate control system and the blower discharge pressure control system even if the target value of the air flow rate suddenly changes. Can be provided.
【図1】本発明による燃焼空気流量制御装置の一実施例
を示す系統構成図。FIG. 1 is a system configuration diagram showing an embodiment of a combustion air flow rate control device according to the present invention.
1:ブロア、2:VVVF電源装置、33,3b,…:
燃焼空気供給系統、4:圧力検出器、5a,5b,…:
流量検出器、6a,6b,…:流量制御弁、7:燃料制
御部、8a,8b,…:流量調節計、9:最大値選択
部、10:折線処理部、11:圧力調節計、12:変化
検出部、13:操作出力処理部。1: Blower, 2: VVVF power supply device, 33, 3b, ...:
Combustion air supply system, 4: Pressure detector, 5a, 5b, ...:
Flow rate detector, 6a, 6b, ...: Flow rate control valve, 7: Fuel control section, 8a, 8b, ...: Flow rate controller, 9: Maximum value selection section, 10: Broken line processing section, 11: Pressure controller, 12 : Change detection unit, 13: Operation output processing unit.
Claims (1)
VVF)電源装置により回転数制御して複数設備の燃焼
空気供給系統に供給される空気流量を燃焼空気要求量に
応じてそれぞれ設定される目標値に基づいて制御する燃
焼空気流量制御装置において、前記各設備に要求される
空気流量目標値の変化を検出する変化検出手段と、この
変化検出手段により空気流量目標値の変化が検出される
と前記ブロアの吐出圧の元圧制御が一時的にホールドさ
れるように制限するための操作指令を前記VVVF電源
装置に出力する吐出圧操作手段とを備えたことを特徴と
する燃焼空気流量制御装置。1. A variable voltage variable frequency (V
VVF) A combustion air flow rate control device for controlling a rotation speed by a power supply device to control an air flow rate supplied to a combustion air supply system of a plurality of equipments based on target values respectively set according to combustion air demands, Change detecting means for detecting a change in the target value of the air flow rate required for each facility, and when the change detecting means detects a change in the target value of the air flow rate, the source pressure control of the discharge pressure of the blower is temporarily held. And a discharge pressure operating means for outputting an operation command to limit the operation to the VVVF power supply device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4251592A JPH05240422A (en) | 1992-02-28 | 1992-02-28 | Combustion air flow rate controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4251592A JPH05240422A (en) | 1992-02-28 | 1992-02-28 | Combustion air flow rate controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05240422A true JPH05240422A (en) | 1993-09-17 |
Family
ID=12638212
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4251592A Pending JPH05240422A (en) | 1992-02-28 | 1992-02-28 | Combustion air flow rate controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH05240422A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104848250A (en) * | 2015-04-17 | 2015-08-19 | 西安热工研究院有限公司 | Intelligent primary air pressure target value control system and method |
KR20200121073A (en) * | 2019-04-15 | 2020-10-23 | 이승권 | Container type inverter device for energy saving of motor for fan |
KR20200121075A (en) * | 2019-04-15 | 2020-10-23 | 이승권 | Energy saving system using inverter device for preventing inverter failure when mode is switched |
-
1992
- 1992-02-28 JP JP4251592A patent/JPH05240422A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104848250A (en) * | 2015-04-17 | 2015-08-19 | 西安热工研究院有限公司 | Intelligent primary air pressure target value control system and method |
KR20200121073A (en) * | 2019-04-15 | 2020-10-23 | 이승권 | Container type inverter device for energy saving of motor for fan |
KR20200121075A (en) * | 2019-04-15 | 2020-10-23 | 이승권 | Energy saving system using inverter device for preventing inverter failure when mode is switched |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH05240422A (en) | Combustion air flow rate controller | |
JPS6064122A (en) | Burning control device | |
US4363440A (en) | Combustion control system | |
JP2696267B2 (en) | Boiler parallel operation controller | |
JP2002130604A (en) | Method for controlling number of boilers in continuous control of burning rate | |
JP3304478B2 (en) | Fluid temperature control method and apparatus | |
KR20200083767A (en) | Air ratio feedback controlling system for boiler | |
JPH0574758B2 (en) | ||
JP2000274603A (en) | Water supply controller | |
JPH06174381A (en) | Controlling equipment of atmosphere of furnace | |
JPH01252819A (en) | Combustion device | |
JP3207415B2 (en) | Gas water heater | |
JPS61241498A (en) | Flow rate control method for centrifugal compressor by variable diffuser | |
JPH0580864A (en) | Furnace temperature combustion control method | |
JPH0410361B2 (en) | ||
JPH0549965A (en) | Method for controlling temperature of mill outlet at start-up of milling | |
JP2699487B2 (en) | Hot water mixing control device | |
JPH02211086A (en) | Controller for fan motor | |
JPS58148314A (en) | Burning control method for boiler | |
JPH0587325A (en) | Control of steam pressure for soot blower | |
JPH07133957A (en) | Hot water supplying device | |
JPH0689904B2 (en) | Hot water mixing controller | |
JPH0849803A (en) | Automatic control method of number of operation of boiler | |
JPS63311038A (en) | Hot water feeding control apparatus | |
JPH0738179A (en) | Gas pressure controller |