JPH0674440A - Controller for multifuel combustion burner of boiler - Google Patents
Controller for multifuel combustion burner of boilerInfo
- Publication number
- JPH0674440A JPH0674440A JP22741592A JP22741592A JPH0674440A JP H0674440 A JPH0674440 A JP H0674440A JP 22741592 A JP22741592 A JP 22741592A JP 22741592 A JP22741592 A JP 22741592A JP H0674440 A JPH0674440 A JP H0674440A
- Authority
- JP
- Japan
- Prior art keywords
- burner
- fuel
- amount
- signal
- heat input
- 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
Landscapes
- Feeding And Controlling Fuel (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ボイラ用混焼バーナの
制御装置に係り、特に油やガスなどの流体燃料や微粉炭
などの異種燃料を混焼する際に、ボイラの燃焼装置（バ
ーナ）に過剰、または過少な燃料が供給されることのな
いようにしたボイラ用混焼バーナの制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a co-firing burner for a boiler, and more particularly to a combustion device (burner) for a boiler when co-firing a fluid fuel such as oil or gas or a different fuel such as pulverized coal. The present invention relates to a control device for a co-firing burner for a boiler, which prevents supply of excessive or excessive fuel.
【０００２】[0002]
【従来の技術】図２は従来の異種燃料混焼ボイラの概要
図である。１０１はボイラ、１０２はボイラへの給水
管、１０３は節炭器、水壁および蒸発器部、１０６は１
次過熱器、１０７はスプレ弁、１１０は異種燃料を燃焼
する混焼バーナ、１１１はバーナに燃焼用空気を供給す
るウインドボックス、１１３と１１８は燃料種類の異な
る燃料弁、１１５と１１９はそれぞれ燃料種類の異なる
燃料供給管路、１１６は燃焼空気供給ダクト、１１４は
空気量制御ダンパである。2. Description of the Related Art FIG. 2 is a schematic diagram of a conventional different fuel mixed combustion boiler. 101 is a boiler, 102 is a water supply pipe to the boiler, 103 is a economizer, a water wall and an evaporator part, and 106 is 1
Next superheater, 107 is a spray valve, 110 is a co-firing burner that burns different types of fuel, 111 is a wind box that supplies combustion air to the burner, 113 and 118 are fuel valves with different fuel types, and 115 and 119 are fuel types, respectively. Of different fuel supply lines, 116 is a combustion air supply duct, and 114 is an air amount control damper.
【０００３】石炭と重油、またはガス燃料をバーナで混
焼させる上記ボイラにおいて、ある燃料で燃焼中に他の
燃料に切替える場合、従来は運転員の判断により、バー
ナへの入熱量が超過しないように、当初燃焼中の燃料供
給弁開度を絞ったのちに、他の燃料の供給を開始してい
た。In the above-mentioned boiler in which coal and heavy oil or gas fuel are mixed and burned by a burner, when switching to another fuel while burning one fuel, conventionally, the heat input to the burner should not be exceeded by the operator's judgment. After initially reducing the opening of the fuel supply valve during combustion, the supply of other fuel was started.
【０００４】[0004]
【発明が解決しようとする課題】上記したように従来技
術では、燃料切替えの混焼時における、燃料絞り込み
は、運転員の判断に委ねられており、運転員の誤操作ま
たは判断の誤りにより、バーナに過大な燃料が投入さ
れ、バーナまたは火炉壁の焼損に至るという危険性、ま
たは燃料絞り込み量が、大きすぎることによりボイラ出
力が必要以上に低下するという問題があった。As described above, in the prior art, the narrowing down of fuel at the time of mixed combustion of fuel switching is left to the operator's judgment, and the burner may be erroneously operated or misjudged by the operator. There was a risk that the burner or the furnace wall would be burned out due to an excessive amount of fuel being injected, or the amount of fuel narrowed down would be too large and the boiler output would be reduced more than necessary.
【０００５】本発明は、上記した従来技術の問題点を解
決するためになされたもので、その目的は、従来技術で
は運転員の判断に委ねていた燃料の絞り込み操作を制御
装置内に組み込むことにより、確実に実施することによ
りバーナおよび火炉壁の焼損を防止しかつボイラ出力が
必要以上に低下することを防止するボイラ用混焼バーナ
の制御装置を提供することにある。The present invention has been made in order to solve the above-mentioned problems of the prior art, and an object thereof is to incorporate the fuel narrowing operation, which was left to the operator's judgment in the prior art, into the control device. Accordingly, it is an object of the present invention to provide a controller for a mixed burner for a boiler, which prevents burnout of the burner and the furnace wall and prevents the boiler output from unnecessarily decreasing by being surely implemented.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
本願の第１の発明は、第１の燃料とそれとは異なる第２
の燃料とを混焼するボイラ用混焼バーナの制御装置にお
いて、バーナにて燃焼中の第１の燃料の供給量を求める
手段と、上記供給量にその燃料の単位量当たりの発熱量
を乗算してバーナへの入熱量を算出する手段と、バーナ
熱負荷制限設定器からの制限値より上記算出されたバー
ナへの入熱量を減算してバーナへの追加可能入熱量を算
出する手段と、上記追加可能入熱量を第２の燃料の発熱
量で割算してバーナへの第２の燃料の供給可能量を算出
する手段と、ボイラ負荷要求信号に基づく第２の燃料の
供給要求信号と前記バーナへの第２の燃料の供給可能量
信号とを比較して低い方の信号値を選択する手段と、選
択された信号値に基づきバーナへの第２の燃料供給量を
制御する手段とを備えたことを特徴とするボイラ用混焼
バーナの制御装置に関する。To achieve the above object, a first invention of the present application is directed to a first fuel and a second fuel different from the first fuel.
In a control device for a co-firing burner for a boiler for co-firing with fuel, the means for determining the supply amount of the first fuel being burned by the burner is multiplied by the calorific value per unit amount of the fuel. A means for calculating the heat input to the burner, a means for calculating the heat input to the burner by subtracting the heat input to the burner calculated above from the limit value from the burner heat load limit setter, and the addition described above. Means for dividing the possible heat input by the calorific value of the second fuel to calculate the supplyable amount of the second fuel to the burner, the second fuel supply request signal based on the boiler load request signal, and the burner. Means for comparing the second supplyable fuel amount signal to the burner and selecting a lower signal value, and means for controlling the second fuel supply amount to the burner based on the selected signal value. Control device for mixed burner for boiler characterized by About.
【０００７】第２の発明は、液体または気体燃料（以下
流体燃料という）と微粉固体燃料とを混焼するボイラ用
混焼バーナの制御装置において、バーナに供給して燃焼
中の流体燃料量よりバーナ１基当たりの流体燃料入熱量
を算出する手段と、バーナへの入熱制限値と上記算出し
た入熱量よりバーナ１基当たりの追加可能入熱量を算出
する手段と、上記算出した追加可能入熱量と固体燃料の
発熱量によりバーナ１基当たりの微粉固体燃料の供給可
能量を算出する手段と、該供給可能量と微粉固体を製造
するミル１台当たりのバーナ本数とからミル１台当たり
の供給可能固体燃料量を算出する手段と、該手段より求
めた値とボイラ負荷信号に基づくミルへの固体燃料要求
信号とを比較して低い値を選択する手段と、選択された
値によりミルへの固体燃料供給量を制御する手段とを備
えたことを特徴とするボイラ用混焼バーナの制御装置に
関する。A second aspect of the present invention is a controller for a mixed combustion burner for a boiler, which mix-burns a liquid or gas fuel (hereinafter referred to as a fluid fuel) and a fine powder solid fuel. A means for calculating the heat input amount of the fluid fuel per unit, a means for calculating the additional heat input amount per burner based on the heat input limit value to the burner and the heat input amount calculated above, and the heat addition amount calculated above A means for calculating the supplyable amount of fine powdered solid fuel per burner based on the calorific value of solid fuel, and the supplyable amount per mill based on the supplyable amount and the number of burners per mill that produces fine powdered solids A means for calculating the solid fuel amount, a means for comparing the value obtained by the means with a solid fuel request signal to the mill based on the boiler load signal, and selecting a low value, and a means for selecting the value to the mill according to the selected value. Further comprising a means for controlling the body fuel supply amount to a control device of the multi-fuel burner boiler characterized.
【０００８】[0008]
【作用】本発明の制御装置によれば、自動的に現在のバ
ーナ１本当たりの入熱量と、バーナの許容入熱量の差に
より可能な投入燃料量の最大値を求め、それに基づいた
燃料量を投入するので、運転員の誤操作、判断の誤りに
より、過大な燃料量が投入され、バーナおよび火炉壁が
焼損したり、またはその逆に、過少な燃料投入により、
ボイラ出力が必要以上に低下することがない。According to the control device of the present invention, the maximum value of the input fuel amount that can be obtained is automatically obtained by the difference between the current heat input amount per burner and the allowable heat input amount of the burner, and the fuel amount based on this is obtained. Since an excessive amount of fuel is injected due to operator's erroneous operation or wrong judgment, the burner and furnace wall are burned, or vice versa, due to excessive fuel injection,
Boiler output does not drop more than necessary.
【０００９】[0009]
【実施例】本発明の一実施例であるボイラ用混焼バーナ
の制御装置に係る燃料投入量制限回路を図１により説明
する。油供給流量発信器１からの油供給流量信号２１
（m3／hr）と、油戻り流量発信器２からの油戻り流量信
号２２（m3／h ）を減算器３に入力して、油投入流量信
号２３が得られる。乗算器４を用いて油投入流量信号２
３に、油比重設定器５によって設定される油比重設定信
号２６を乗算することにより、TON/HRで表わす１時間当
たりの油投入流量信号２７を得る。これと使用バーナ数
（カウント値）２８を用い、割算器６で演算し、バーナ
１本当たりの油流量信号２９が得られる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A fuel input amount limiting circuit relating to a controller for a boiler mixed burner according to an embodiment of the present invention will be described with reference to FIG. Oil supply flow rate signal 21 from the oil supply flow rate transmitter 1
(M 3 / hr) and the oil return flow rate signal 22 (m 3 / h) from the oil return flow rate transmitter 2 are input to the subtractor 3 to obtain an oil input flow rate signal 23. Oil input flow rate signal 2 using multiplier 4
By multiplying 3 by the oil specific gravity setting signal 26 set by the oil specific gravity setting device 5, an oil input flow rate signal 27 per hour represented by TON / HR is obtained. Using this and the number of burners (count value) 28 used, calculation is performed by the divider 6, and an oil flow rate signal 29 per burner is obtained.
【００１０】これと油発熱量設定器７によって設定され
る油発熱量設定信号３０とを乗算器８を用いて演算する
ことにより油バーナ１基（本）当たりの入熱信号３１が
得られる。減算器１０を用いてバーナ負荷制限設定器９
で設定されるバーナ負荷制限設定信号３２から油バーナ
１基（本）当たりの入熱信号３１を減算することによ
り、さらに投入可能なバーナ１基当たりの油の許容投入
熱量信号３３が得られる。A heat input signal 31 for one oil burner (book) is obtained by calculating this and the oil heat generation amount setting signal 30 set by the oil heat amount setting device 7 using the multiplier 8. Burner load limit setter 9 using subtractor 10
By subtracting the heat input signal 31 per oil burner (book) from the burner load limit setting signal 32 set in step 1, the allowable oil heat input signal 33 per burner that can be input is obtained.
【００１１】そのバーナ許容投入熱量信号３３と石炭発
熱量設定器１１で設定される石炭発熱量設定信号３４を
用いて割算器１２で演算することにより、バーナ１基当
たりの投入可能な最大石炭量信号３５が求まる。バーナ
１基当たりの投入可能な最大石炭量信号３５と、ミル１
台当たりのバーナ本数設定器１４で与えられるバーナ本
数設定信号３９とを用いて乗算器１５により演算するこ
とにより、ミル１台当たりの投入可能な石炭量の最大信
号３６を得る。これとコールフィダーへの石炭供給量要
求信号３７とを低位選択器１８を用いて比較し、値の低
い方をコールフィダーの石炭供給指令信号３８として使
用する。なお、バーナに設置する燃料噴射ノズルはバー
ナ１基当たり１〜複数本設ける。The maximum burnable coal per burner is calculated by the divider 12 using the burner allowable input heat quantity signal 33 and the coal heat quantity setting signal 34 set by the coal heat quantity setter 11. The quantity signal 35 is obtained. Maximum coal quantity signal 35 per burner and mill 1
The maximum signal 36 of the amount of coal that can be input per mill is obtained by the calculation by the multiplier 15 using the burner number setting signal 39 provided by the burner number setting device 14 per unit. This is compared with the coal supply demand signal 37 to the coal feeder using the low level selector 18, and the lower one is used as the coal feeder command signal 38 to the coal feeder. It should be noted that one to a plurality of fuel injection nozzles are installed in each burner per burner.
【００１２】[0012]
【発明の効果】本発明によれば、重油、原油、ガス燃
料、微粉炭などの異種燃料が同一バーナで燃焼される場
合、特に流体燃料、例えば油の専焼から微粉炭を新たに
供給し、油と微粉炭の混焼へ移行する過渡期において
も、バーナ１基当たりの入熱が制限値を超えることがな
く、バーナや火炉壁を焼損することを防止し、また燃料
の供給不足によるボイラ出力の必要以上の低下を防止す
ることができる。According to the present invention, when different fuels such as heavy oil, crude oil, gas fuel and pulverized coal are burned by the same burner, especially pulverized coal is newly supplied from fluid fuel, for example, oil burning, Even during the transitional period of transition to mixed combustion of oil and pulverized coal, the heat input per burner does not exceed the limit value, burnout of the burner and furnace wall is prevented, and boiler output due to insufficient fuel supply Can be prevented from unnecessarily decreasing.
【図１】本発明になるボイラ用混焼バーナ制御装置の系
統図。FIG. 1 is a system diagram of a mixed burner controller for a boiler according to the present invention.
【図２】従来技術の説明図。FIG. 2 is an explanatory diagram of a conventional technique.
１…油供給流量発信器、２…油戻り流量発信器、３…減
算器、４…乗算器、５…油比重設定器、６…割算器、７
…油発熱量設定器、８…乗算器、９…バーナ負荷制限設
定器、１０…減算器、１１…石炭発熱量設定器、１４…
ミル当たりのバーナ本数設定器、１６…石炭量要求信
号、１８…低位選択器、３８…石炭供給量指令信号。1 ... Oil supply flow rate transmitter, 2 ... Oil return flow rate transmitter, 3 ... Subtractor, 4 ... Multiplier, 5 ... Oil specific gravity setting device, 6 ... Divider, 7
... Oil calorific value setter, 8 ... Multiplier, 9 ... Burner load limit setter, 10 ... Subtractor, 11 ... Coal calorific value setter, 14 ...
Burner number per mill setting device, 16 ... Coal amount request signal, 18 ... Low level selector, 38 ... Coal supply amount command signal.
Claims (2)
とを混焼するボイラ用混焼バーナの制御装置において、
バーナにて燃焼中の第１の燃料の供給量を求める手段
と、上記供給量にその燃料の単位量当たりの発熱量を乗
算してバーナへの入熱量を算出する手段と、バーナ熱負
荷制限設定器からの制限値より上記算出されたバーナへ
の入熱量を減算してバーナへの追加可能入熱量を算出す
る手段と、上記追加可能入熱量を第２の燃料の発熱量で
割算してバーナへの第２の燃料の供給可能量を算出する
手段と、ボイラ負荷要求信号に基づく第２の燃料の供給
要求信号と前記バーナへの第２の燃料の供給可能量信号
とを比較して低い方の信号値を選択する手段と、選択さ
れた信号値に基づきバーナへの第２の燃料供給量を制御
する手段とを備えたことを特徴とするボイラ用混焼バー
ナの制御装置。1. A control device for a co-firing burner for a boiler for co-firing a first fuel and a second fuel different from the first fuel,
Means for obtaining the supply amount of the first fuel being burned by the burner, means for calculating the heat input amount to the burner by multiplying the supply amount by the calorific value per unit amount of the fuel, and burner heat load limit A means for subtracting the calculated heat input to the burner from the limit value from the setter to calculate the additional heat input to the burner, and dividing the additional heat input to the heat value of the second fuel. Means for calculating the second fuel supplyable amount signal to the burner, and comparing the second fuel supply request signal based on the boiler load request signal with the second fuel supplyable amount signal to the burner. A control device for a co-firing burner for a boiler, comprising: a means for selecting a lower one of the signal values and a means for controlling a second fuel supply amount to the burner based on the selected signal value.
う）と微粉固体燃料とを混焼するボイラ用混焼バーナの
制御装置において、バーナに供給して燃焼中の流体燃料
量よりバーナ１基当たりの流体燃料入熱量を算出する手
段と、バーナへの入熱制限値と上記算出した入熱量より
バーナ１基当たりの追加可能入熱量を算出する手段と、
上記算出した追加可能入熱量と固体燃料の発熱量により
バーナ１基当たりの微粉固体燃料の供給可能量を算出す
る手段と、該供給可能量と微粉固体を製造するミル１台
当たりのバーナ本数とからミル１台当たりの供給可能固
体燃料量を算出する手段と、該手段より求めた値とボイ
ラ負荷信号に基づくミルへの固体燃料要求信号とを比較
して低い値を選択する手段と、選択された値によりミル
への固体燃料供給量を制御する手段とを備えたことを特
徴とするボイラ用混焼バーナの制御装置。2. A controller for a mixed combustion burner for a boiler, which mixes a liquid or gas fuel (hereinafter referred to as a fluid fuel) and a fine powder solid fuel, and a fluid per burner based on the amount of the fluid fuel supplied to the burner and burning. A means for calculating the fuel heat input, a means for calculating the additional heat input per burner based on the heat input limit value to the burner and the heat input calculated above,
A means for calculating the supplyable amount of fine solid fuel per burner based on the calculated additional heat input amount and the calorific value of solid fuel, and the supplyable amount and the number of burners per mill for producing fine solids. Means for calculating the amount of solid fuel that can be supplied per mill from the machine, means for comparing the value obtained by the means with the solid fuel request signal to the mill based on the boiler load signal, and selecting a low value; And a means for controlling the solid fuel supply amount to the mill according to the determined value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22741592A JP3181393B2 (en) | 1992-08-26 | 1992-08-26 | Boiler mixed burner control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22741592A JP3181393B2 (en) | 1992-08-26 | 1992-08-26 | Boiler mixed burner control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0674440A true JPH0674440A (en) | 1994-03-15 |
| JP3181393B2 JP3181393B2 (en) | 2001-07-03 |
Family
ID=16860488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22741592A Expired - Fee Related JP3181393B2 (en) | 1992-08-26 | 1992-08-26 | Boiler mixed burner control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3181393B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012082974A (en) * | 2010-10-06 | 2012-04-26 | Soai:Kk | Combustion equipment |
-
1992
- 1992-08-26 JP JP22741592A patent/JP3181393B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012082974A (en) * | 2010-10-06 | 2012-04-26 | Soai:Kk | Combustion equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3181393B2 (en) | 2001-07-03 |
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