JPH02122111A - Combustion and cooling control system for firing furnace - Google Patents
Combustion and cooling control system for firing furnaceInfo
- Publication number
- JPH02122111A JPH02122111A JP27329688A JP27329688A JPH02122111A JP H02122111 A JPH02122111 A JP H02122111A JP 27329688 A JP27329688 A JP 27329688A JP 27329688 A JP27329688 A JP 27329688A JP H02122111 A JPH02122111 A JP H02122111A
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- valve
- combustion
- air
- cooling
- 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 31
- 238000001816 cooling Methods 0.000 title claims abstract description 29
- 238000010304 firing Methods 0.000 title claims abstract description 28
- 238000000889 atomisation Methods 0.000 claims abstract description 7
- 239000000446 fuel Substances 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 6
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 239000000567 combustion gas Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/06—Regulating air supply or draught by conjoint operation of two or more valves or dampers
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)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、焼成炉等の燃焼および冷却を３次空気を用い
て制御する制御系に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a control system for controlling combustion and cooling of a firing furnace or the like using tertiary air.
（従来の技術）
従来、焼成炉において、第８図に示すように、焼成用バ
ーナ１に燃料および空気を燃料供給管２、霧化用１次空
気供給管３、燃焼用２次空気供給管４および燃焼および
冷却用３次空気供給管５によりそれぞれの流量制御弁Ｖ
＋、■ｚ、ＶｚおよびＶ４を経て供給し、アクチュエー
タとして電動モータを用いて流量制御弁■１〜ｖ４を制
御して焼成および冷却を行なうことが既知である。(Prior Art) Conventionally, in a firing furnace, as shown in FIG. 8, fuel and air are supplied to a firing burner 1 through a fuel supply pipe 2, a primary air supply pipe 3 for atomization, and a secondary air supply pipe for combustion. 4 and a tertiary air supply pipe 5 for combustion and cooling to each flow control valve V.
It is known that firing and cooling are carried out by supplying the liquid via the +, ■z, Vz and V4, and controlling the flow rate control valves ■1 to v4 using an electric motor as an actuator.
上述した従来の３次空気を用いて燃焼および冷却を制御
する制御系では、流量制御弁Ｖ、、Ｖ２゜■３および■
４の全てが弁開度の増大にしたがって流量が増大する弁
特性を有するものを使用している。In the above-mentioned conventional control system that controls combustion and cooling using tertiary air, the flow control valves V, , V2゜■3 and ■
All of No. 4 use valves having a characteristic that the flow rate increases as the valve opening increases.
したがって、燃焼時に第１０図に示すヒートカーブへの
ように焼成炉の温度を徐々に昇温しで所定の焼成温度に
加熱するために空燃比ｍを破線曲線Ｂで示すように制御
するには、制御弁Ｖ、、Ｖ２および■、を１個の共通モ
ータＭ、によって連動制御し、３次空気流量制御弁■４
を別個のモータＭ２により制御する必要があった。Therefore, in order to gradually raise the temperature of the firing furnace to a predetermined firing temperature as shown in the heat curve shown in Figure 10 during combustion, it is necessary to control the air-fuel ratio m as shown by the broken line curve B. , control valves V, , V2 and ■ are interlocked and controlled by one common motor M, and a tertiary air flow control valve ■4
had to be controlled by a separate motor M2.
したがって、従来のモータＭ、およびＭ２の制御回路は
第９図に示すように温度プログラマ−ＰＲＩと弁開度プ
ログラマ−ＰＲ２からモータＭ、用コントローラＣＲＩ
およびモータＭ２用コントローラＣＲ２にそれぞれ制御
信号を入力するよう接続するとともに温度プログラマ−
ＰＲＩおよび弁開度プログラマ−ＰＲ２をコントローラ
切り換えリレーＲ１を介してコントローラＣＲＩおよび
ＣＲ２に接続するよう構成され、焼成工程においては温
度プログラマ−ＰＲＩをモータＭ１用コントローラＣＲ
Ｉに接続するとともに弁開度プログラマ−ＰＲ２をモー
タＭ２用コントローラＣＲ２に接続し、焼成工程から冷
却工程に移行する際に、コントローラ切り換えリレーＲ
１により接続を切り換えて温度プログラマ−ＰＲＩをモ
ータＭ２用コントローラに接続し、弁開度プログラマ−
ＰＲ２をモータＭ１用コントローラＣＲＩに接続し、さ
らにモータＭ１用コントローラの特性を逆転させる必要
があった。Therefore, the conventional control circuit for motors M and M2 is as shown in FIG.
and controller CR2 for motor M2 to input control signals, and a temperature programmer.
PRI and valve opening degree programmer-PR2 are configured to be connected to controllers CRI and CR2 via controller switching relay R1, and in the firing process, temperature programmer-PRI is connected to controller CR for motor M1.
I and connect the valve opening programmer PR2 to the controller CR2 for motor M2, and when moving from the firing process to the cooling process, the controller switching relay R
1, switch the connection, connect the temperature programmer PRI to the controller for motor M2, and connect the valve opening programmer.
It was necessary to connect PR2 to the controller CRI for motor M1 and to reverse the characteristics of the controller for motor M1.
（発明が解決しようとする課題）
上述したように従来の制御系は、焼成時および冷却時に
、燃料および１次、２次空気流量制御弁の制御と３次空
気流量制御弁の制御とを別個のモタによってそれぞれ行
なうようにし、両モークの制御を相違させる必要がある
ため、その制御系が複雑となり、高価となる問題があっ
た。(Problem to be Solved by the Invention) As described above, the conventional control system separately controls the fuel and primary and secondary air flow control valves and the tertiary air flow control valve during firing and cooling. Since it is necessary to control the two motors separately and to control the two motors differently, there is a problem that the control system becomes complicated and expensive.
本発明は上述した問題を解決し、制御系の構成を簡単に
して安価に提供することを目的とする。It is an object of the present invention to solve the above-mentioned problems and to simplify the configuration of a control system and provide it at low cost.
（課題を解決するだめの手段）
本発明によれば、 焼成用バーナに燃料および１次、２
次および３次空気をそれぞれの供給管に設けた流量制御
弁Ｖ １． Ｖ ２＋ Ｖ ３および■４により制御し
て供給し、これらの流量制御弁■１〜■４を温度プログ
ラマ−により制御する燃焼冷却制御系において、３次空
気流量制御弁の弁開度と流量との関係の弁特性を燃料お
よび１次、２次空気流量制御弁Ｖ、、Ｖ２．Ｖ３の弁開
度と流量との関係の弁特性の逆にし、３次空気流量弁を
少なくとも他の空気流量制御弁と共通のアクチュエータ
により制御することを特徴とする。(Means for Solving the Problem) According to the present invention, a firing burner is provided with fuel and primary and secondary
Flow rate control valve V provided in each supply pipe for secondary and tertiary air 1. In a combustion cooling control system in which V 2+ is controlled and supplied by V 3 and ■ 4, and these flow rate control valves ■ 1 to ■ 4 are controlled by a temperature programmer, the valve opening degree and flow rate of the tertiary air flow control valve are The valve characteristics related to the fuel and primary and secondary air flow rate control valves V, , V2. The valve characteristic of the relationship between the valve opening and the flow rate of V3 is reversed, and the tertiary air flow valve is controlled by an actuator common to at least other air flow control valves.
（作 用）
本発明によれば、燃焼および冷却用３次空気の流量制御
弁Ｖ４の弁特性を他の燃料、空気流量制御弁の弁特性の
逆にしたことによって、燃料および空気供給管に設けら
れる流量制御弁■１〜■４の全てを共通のモータＭによ
って連動制御して焼成を行なうことができ、また焼成工
程から冷却工程への移行に際しても、コントローラの切
り換えを行なうことなく、温度プログラマ−によりモー
タＭ用コントローラを介してモータＭを１系列で制御し
て所望の燃焼および冷却制御を行なうことができる。(Function) According to the present invention, by making the valve characteristics of the combustion and cooling tertiary air flow rate control valve V4 opposite to those of other fuel and air flow rate control valves, the fuel and air supply pipes are controlled. All of the flow control valves (1 to 4) provided can be controlled in conjunction with a common motor M to perform firing, and even when transitioning from the firing process to the cooling process, the temperature can be adjusted without switching the controller. The programmer can control the motor M in one series via the motor M controller to perform desired combustion and cooling control.
（実施例）
本発明の１実施例を第１図〜第６図に示す。図示の例で
は、焼成用バーナ１に燃料および１次、２次および３次
空気を供給する燃料供給管２、霧化用１次空気供給管３
、燃焼用２次空気供給管４および燃焼および冷却用３次
空気供給管５が設けられ、これらの供給管に流量制御弁
Ｖ、、Ｖ２．Ｖ。(Example) An example of the present invention is shown in FIGS. 1 to 6. In the illustrated example, a fuel supply pipe 2 that supplies fuel and primary, secondary, and tertiary air to the firing burner 1, and a primary air supply pipe 3 for atomization are shown.
, a combustion secondary air supply pipe 4 and a combustion and cooling tertiary air supply pipe 5 are provided, and these supply pipes are provided with flow rate control valves V, , V2 . V.
および■４がそれぞれ設けられている。and ■4 are provided respectively.
これらの流量制御弁の内、３次空気流量制御弁■４の弁
開度と流量との関係の弁特性を１次、２次空気流量制御
弁Ｖ２、Ｖ３の弁開度と流量との関係の弁特性の逆にし
ており、例えば、霧化用１次空気の流量制御弁■２およ
び燃焼用２次空気の流量制御弁■３の弁特性を第２図お
よび第３図にそれぞれ示すように弁開度の増大に比例し
て流量が増大する弁特性とし、これに反し、燃焼および
冷却用３次空気の流量制御弁■４の弁特性を第４図に示
すように弁開度の増大に比例して流量が減少する弁特性
としている。Among these flow rate control valves, the valve characteristics of the relationship between the valve opening and flow rate of the tertiary air flow control valve ■4 and the relationship between the valve opening and flow rate of the primary and secondary air flow control valves V2 and V3 are shown below. For example, the valve characteristics of the atomization primary air flow control valve ■2 and the combustion secondary air flow control valve ■3 are shown in Figures 2 and 3, respectively. In contrast, the valve characteristics of the combustion and cooling tertiary air flow rate control valve ■4 are set to increase in proportion to the valve opening as shown in Figure 4. The valve characteristic is such that the flow rate decreases in proportion to the increase.
図示の例では、流量制御弁■１〜■４を１個の共通モー
タＭにリンク連結して連動させ、これにより第５図に示
すように弁開度に比例した合計空気流量が得られ、所望
の空燃比を得ることができる。In the illustrated example, the flow rate control valves (1) to (4) are linked and operated by one common motor M, and as a result, a total air flow rate proportional to the valve opening degree is obtained as shown in FIG. A desired air-fuel ratio can be obtained.
モータＭは第６図に示すように、温度プログラマ−ＰＲ
Ｉに接続されたコントローラＣＲＩによって一系列で制
御するよう接続される。The motor M is connected to a temperature programmer-PR as shown in FIG.
They are connected to be controlled in series by a controller CRI connected to I.
上述の構成によれば焼成炉の焼成時には：〔りＭを制御
して全流量制御弁■、〜■４の弁開度の増大させること
より、その弁開度の増大に比例して焼成炉の燃焼ガス温
度を１５０°Ｃから１５００°Ｃまで上昇させることが
でき、また、冷却時には、モータＭを制御して弁■１〜
■４の弁開度を減小させることによりその弁開度の減小
に比例して空気量を増大させて焼成炉内を冷却させるこ
とができる。これがため、１系列の制御設備で１５０°
Ｃ〜１５００°Ｃの燃焼ガスを連続的に得ることができ
る。According to the above-mentioned configuration, when firing in the firing furnace: [M is controlled to increase the valve openings of the total flow control valves ①, 〜■4, and the firing furnace increases in proportion to the increase in the valve openings. The temperature of the combustion gas can be raised from 150°C to 1500°C, and during cooling, the motor M can be controlled to
(2) By reducing the opening degree of the valve 4, the amount of air can be increased in proportion to the decrease in the opening degree of the valve, thereby cooling the inside of the firing furnace. For this reason, 150° with one series of control equipment
Combustion gas at a temperature of 1500°C to 1500°C can be obtained continuously.
第７図は本発明による燃焼および冷却制御系の他の実施
例を示しており、本例では、燃料ポンプ（図示せず）に
より焼成用バーナｌに燃料を供給する燃料供給管２に調
整可能の燃料流量制御用均圧弁■、を設け、燃焼用２次
空気流量制御弁■３と焼成用バーナ１との間の２次空気
供給管部分から燃料流量制御用均圧弁■、にパイロット
圧管６を経て燃料制御圧力ＰＸを供給して、燃料流量制
御用均圧弁Ｖ５による焼成用バーナ１への燃料供給量を
焼成用バーナへの空気供給量の変化に応じて変化させる
よう構成されている。なお図中、第１図におけると同様
の部分を同じ符号で示しており、第１図に示す燃焼およ
び冷却制御系と同様の作用効果を有する。FIG. 7 shows another embodiment of the combustion and cooling control system according to the invention, in which the fuel supply pipe 2 can be adjusted to supply fuel to the firing burner l by means of a fuel pump (not shown). A pilot pressure pipe 6 is provided from the secondary air supply pipe between the combustion secondary air flow control valve ■3 and the firing burner 1 to the fuel flow control equalization valve ■. The fuel control pressure PX is supplied through the fuel flow rate control equalizing valve V5 to change the amount of fuel supplied to the firing burner 1 in accordance with the change in the amount of air supplied to the firing burner. In the figure, the same parts as in FIG. 1 are indicated by the same reference numerals, and have the same effects as the combustion and cooling control system shown in FIG. 1.
（発明の効果）
本発明によれば制御系の構成を従来のものに比べ著しく
簡単かつ安価にすることができる。(Effects of the Invention) According to the present invention, the configuration of the control system can be made significantly simpler and cheaper than the conventional one.
第１図は本発明の燃焼および冷却制御系の環路線図、
第２図は霧化用１次空気の流量制御弁の特性を示すグラ
フ、
第３図は燃焼用２次空気の流量制御弁の特性を示すグラ
フ、
第４図は燃焼および冷却用３次空気の流量制御弁の特性
を示すグラフ、
第５図は１次、２次および３次空気の流量制御弁を通る
合計空気流量を示すグラフ、
第６図は第１図に示すモータＭの制御用ブロック回路図
、
第７図は本発明の燃焼および冷却制御系の他の実施例を
示す環路線図、
第８図は従来の燃焼および冷却制御系の環路線図、
第９図は第３図に示ずモータＭ１およびＭ２の制御用ブ
ロンク回路図、
第１０図は焼成炉の焼成および冷却時間と温度との関係
を示すグラフである。
１・・・焼成用バーナ ２・・・燃料供給管３・・・
１次空気供給管 ４・・・燃焼用２次空気供給管５・・
・燃焼および冷却用３次空気供給管■、〜■４・・・流
量制御弁Figure 1 is a loop diagram of the combustion and cooling control system of the present invention, Figure 2 is a graph showing the characteristics of the flow rate control valve for the primary air for atomization, and Figure 3 is the flow rate control valve for the secondary air for combustion. Figure 4 is a graph showing the characteristics of the combustion and cooling tertiary air flow control valve. Figure 5 is the total air flow rate through the primary, secondary and tertiary air flow control valves. 6 is a block circuit diagram for controlling the motor M shown in FIG. 1, FIG. 7 is a ring diagram showing another embodiment of the combustion and cooling control system of the present invention, and FIG. 8 is a conventional A circular diagram of the combustion and cooling control system. Figure 9 is a bronch circuit diagram for controlling motors M1 and M2 (not shown in Figure 3). Figure 10 is a graph showing the relationship between firing and cooling times of the firing furnace and temperature. It is. 1... Burner for firing 2... Fuel supply pipe 3...
Primary air supply pipe 4... Secondary air supply pipe for combustion 5...
・Tertiary air supply pipe for combustion and cooling■, ~■4...Flow rate control valve
Claims (1)
および冷却用３次空気をそれぞれの供給管に設けた流量
制御弁Ｖ＿２、Ｖ＿３およびＶ＿４により制御して供給
し、これらの流量制御弁Ｖ＿２〜Ｖ＿４を温度プログラ
マーにより制御する燃焼および冷却制御系において、３
次空気流量制御弁Ｖ＿４の弁開度と流量との関係の弁特
性を１次および２次空気流量制御弁 Ｖ＿２およびＶ＿３の弁開度と流量との関係の弁特性の
逆にし、前記空気流量制御弁を共通のアクチュエータに
より制御することを特徴とする焼成炉等の燃焼および冷
却制御系。[Claims] 1. Primary air for atomization, secondary air for combustion, and tertiary air for combustion and cooling are controlled in the firing burner by flow control valves V_2, V_3, and V_4 provided in respective supply pipes. In the combustion and cooling control system, which controls the flow rate control valves V_2 to V_4 by a temperature programmer,
The valve characteristic of the relationship between the valve opening degree and the flow rate of the primary air flow rate control valve V_4 is reversed to the valve characteristic of the relationship between the valve opening degree and the flow rate of the primary and secondary air flow rate control valves V_2 and V_3, and the air flow rate is A combustion and cooling control system for a firing furnace, etc., characterized in that control valves are controlled by a common actuator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27329688A JPH02122111A (en) | 1988-10-31 | 1988-10-31 | Combustion and cooling control system for firing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27329688A JPH02122111A (en) | 1988-10-31 | 1988-10-31 | Combustion and cooling control system for firing furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02122111A true JPH02122111A (en) | 1990-05-09 |
| JPH0449007B2 JPH0449007B2 (en) | 1992-08-10 |
Family
ID=17525878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27329688A Granted JPH02122111A (en) | 1988-10-31 | 1988-10-31 | Combustion and cooling control system for firing furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02122111A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5419126A (en) * | 1991-12-25 | 1995-05-30 | Maruyama Mfg. Co. Inc | Exhaust silencer |
| JP2021081093A (en) * | 2019-11-15 | 2021-05-27 | 中外炉工業株式会社 | Burner device, and heat treatment facility |
-
1988
- 1988-10-31 JP JP27329688A patent/JPH02122111A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5419126A (en) * | 1991-12-25 | 1995-05-30 | Maruyama Mfg. Co. Inc | Exhaust silencer |
| JP2021081093A (en) * | 2019-11-15 | 2021-05-27 | 中外炉工業株式会社 | Burner device, and heat treatment facility |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0449007B2 (en) | 1992-08-10 |
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