JPS6096828A - Combustion control circuit for molten metal retaining furnace - Google Patents
Combustion control circuit for molten metal retaining furnaceInfo
- Publication number
- JPS6096828A JPS6096828A JP58203244A JP20324483A JPS6096828A JP S6096828 A JPS6096828 A JP S6096828A JP 58203244 A JP58203244 A JP 58203244A JP 20324483 A JP20324483 A JP 20324483A JP S6096828 A JPS6096828 A JP S6096828A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- combustion
- fuel
- ignition
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2227/00—Ignition or checking
- F23N2227/28—Ignition circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/14—Fuel valves electromagnetically operated
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feeding And Controlling Fuel (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Furnace Details (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、鋳造設備における燃焼炉に関し、さらに詳し
くは燃焼炉のバーナーの燃焼状態を最適に制御するよう
にした燃焼制御回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a combustion furnace in a casting facility, and more particularly to a combustion control circuit that optimally controls the combustion state of a burner in a combustion furnace. .
（従来技術）
従来、着火用のパイロットバーナーと燃焼制御用のメイ
ンバーナーを有する燃焼炉にあっては、コントロールモ
ータ、開閉弁等により燃焼状態を制御している。しかし
、この制御方式によれば、コントロールモータ、開閉弁
等を設置しなければならないので、燃焼回路が複雑で、
精密な燃焼制御が不可欠であると共に、保全性が悪くコ
ストが非常に高価になっている。(Prior Art) Conventionally, in a combustion furnace having a pilot burner for ignition and a main burner for combustion control, the combustion state is controlled by a control motor, an on-off valve, etc. However, this control method requires the installation of a control motor, on-off valve, etc., making the combustion circuit complicated.
Precise combustion control is essential, and maintenance is poor and costs are extremely high.
また、１本のバーナーに対して独立した２系統の燃料供
給回路を備え、その片方をオンオフすることにより高温
燃焼と低温燃焼を切り替えて燃焼制御を行なうようにし
たものも実用化されている。この制御方式では、一方の
系統の燃料供給量を、安定した着火が得られる量以上で
かつ安全に着火できる量以下となるように設定しなけれ
ばならない。そして、他方の系統については、空炉昇温
時間および異常時における溶湯温度の復旧時間の短縮の
ために、バーナーの最大能力に見合うだけの大量の燃料
を供給できるように構成しなけれはならない。In addition, a burner is equipped with two independent fuel supply circuits for one burner, and combustion control is performed by switching between high-temperature combustion and low-temperature combustion by turning one of the circuits on and off. In this control method, the amount of fuel supplied to one system must be set so that it is greater than the amount that provides stable ignition and less than the amount that allows safe ignition. The other system must be configured to be able to supply a large amount of fuel commensurate with the maximum capacity of the burner in order to shorten the time for heating up the empty furnace and the time for restoring the molten metal temperature in the event of an abnormality.
ところで、この制御方式において、炉壁放散熱量および
溶湯表面放散熱量の低減を図るなどの省エネルギーを進
めた場合には、溶湯保持に必要な熱量すなわち燃料供給
量は少なくて済むようになり、■単なる溶湯保持のみに
対しては、必要以上の燃料を供給することになって、結
果的に溶湯温度のバラツキを大さくしたり燃費の悪化を
招いたりする。■また、燃料供給量を溶湯温度保持のみ
に必要な量に設定すると、着火時において十分な量の燃
料が得られず着火が不安定となる。■上記■および■の
問題を解決するだめには、バーナーの能力自体５小さく
すればよいが、この場合には昇温能力が低下してしまう
。By the way, in this control method, if energy conservation is promoted, such as by reducing the amount of heat dissipated from the furnace wall and the amount of heat dissipated from the surface of the molten metal, the amount of heat required to hold the molten metal, that is, the amount of fuel supplied, will be reduced. If only the molten metal is held, more fuel than necessary will be supplied, resulting in increased variation in the molten metal temperature and deterioration of fuel efficiency. (2) Furthermore, if the fuel supply amount is set to the amount necessary only to maintain the temperature of the molten metal, a sufficient amount of fuel will not be obtained at the time of ignition, resulting in unstable ignition. (2) In order to solve the above-mentioned problems (2) and (2), the capacity of the burner itself may be reduced by 5, but in this case, the temperature raising capacity will be reduced.
（発明の目的）
本発明は、この点に鑑みてなされたもので、その目的と
するところは、低コストで保全性を損うことなく溶湯保
持燃費を低減し溶湯温度のバラツキを小さくすると共に
、着火時の安定性を確保し、空炉昇温時間および溶湯温
度の復旧時間を短縮できるようにした溶湯保持炉の燃焼
制御回路を提供することにある。(Objective of the Invention) The present invention has been made in view of this point, and its purpose is to reduce the fuel consumption of molten metal retention at low cost and without impairing maintainability, and to reduce the variation in molten metal temperature. Another object of the present invention is to provide a combustion control circuit for a molten metal holding furnace that ensures stability during ignition and shortens the time for heating up the empty furnace and the time for restoring the molten metal temperature.
（発明の構成）
このため本発明の構成は、着火確認用の火炎検知器を備
えたバーナーに対して、以下の３つの燃焼回路をそれぞ
れ独立して接続したことを特徴とするものである。３つ
の燃焼回路とは、溶湯を保持するのに最適な量の燃料を
供給するための溶湯保持専用燃焼回路と、溶湯保持専用
燃焼回路より供給される燃料量に加えて安定した着火に
必要な量の燃料を着火時のみに補助供給するだめの着火
補助燃焼回路と、溶湯保持専用燃焼回路より供給される
燃料量に加えて空炉昇温時間および溶湯温度低下時にお
ける溶湯温度の復旧時間を最短にするのに必要な大量の
燃料を供給するための昇温専用燃焼回路である。(Configuration of the Invention) Therefore, the configuration of the present invention is characterized in that the following three combustion circuits are each independently connected to a burner equipped with a flame detector for ignition confirmation. The three combustion circuits are a molten metal holding combustion circuit that supplies the optimum amount of fuel to hold the molten metal, and a molten metal holding combustion circuit that supplies the optimum amount of fuel to hold the molten metal. In addition to the amount of fuel supplied from the ignition auxiliary combustion circuit, which supplies a certain amount of fuel only at the time of ignition, and the combustion circuit dedicated to holding the molten metal, the temperature rise time of the empty furnace and the recovery time of the molten metal temperature when the molten metal temperature drops. This is a combustion circuit dedicated to temperature rise to supply the large amount of fuel necessary to minimize the heating time.
（作用）
したがって、着火時においては、溶湯保持専用燃焼回路
および着火補助燃焼回路より、着火に要する燃料量をバ
ーナーに供給することによって安定した着火が得られる
。火炎検知器によって着火を確認した後は、着火補助燃
焼回路からの燃料供給を停止１〜、溶湯保持専用燃焼回
路の茎からバーナーに燃料を安定供給して溶湯を保持す
る。゛その後、空炉昇温時あるいは溶湯温度低下時には
、溶湯保持専用燃焼回路からの燃料供給に加えて昇温専
用燃焼回路よりバーナーに大量の燃料を供給することで
、空炉昇温時間および溶湯温度の復旧時間を最短にでき
る。このように本発明にあっては、溶湯保持中において
最適な燃料量を供給できるので、溶湯保持燃費が向上し
、かつ溶湯温度のバラツキを極力抑制できるものとなる
。(Function) Therefore, at the time of ignition, stable ignition can be obtained by supplying the amount of fuel required for ignition to the burner from the molten metal holding dedicated combustion circuit and the ignition auxiliary combustion circuit. After ignition is confirmed by the flame detector, the fuel supply from the ignition auxiliary combustion circuit is stopped (1), and the molten metal is maintained by stably supplying fuel to the burner from the stem of the molten metal retention combustion circuit.゛After that, when the temperature of the air furnace is rising or the temperature of the molten metal is decreasing, in addition to the fuel supply from the combustion circuit dedicated to holding the molten metal, a large amount of fuel is supplied to the burner from the combustion circuit dedicated to temperature rise, thereby reducing the heating time of the air furnace and the temperature of the molten metal. Temperature recovery time can be minimized. As described above, according to the present invention, since an optimum amount of fuel can be supplied while holding the molten metal, the fuel efficiency for holding the molten metal is improved, and variations in the temperature of the molten metal can be suppressed as much as possible.
（実施例）
以１に、本発明の一実施例を図について説明すると、１
は燃焼炉に設けたバーナーであって、着Ｉｋを確認する
ための火炎検知器２を具備している。この１本のバーナ
ー１には、電磁弁３とこれに直列に設けたニードル弁４
とからなる溶湯保持専用燃焼回路５、電磁弁６とこれに
直列に設けたニードル弁７とからなる着火補助燃焼回路
８、電磁弁９とこれに直列に設けたニードル弁１０とか
らなる昇温専用燃焼回路１１がそれぞれ独立して並列に
接続されている。１２は上記６つの燃焼回路５．８．１
１に接続された燃料供給源である。(Example) Below, one example of the present invention will be explained with reference to the drawings.
is a burner installed in a combustion furnace, and is equipped with a flame detector 2 for confirming Ik. This one burner 1 includes a solenoid valve 3 and a needle valve 4 installed in series with the solenoid valve 3.
A molten metal retention combustion circuit 5 consisting of a molten metal holding combustion circuit 5, an ignition auxiliary combustion circuit 8 consisting of a solenoid valve 6 and a needle valve 7 installed in series with it, and a temperature raising circuit consisting of a solenoid valve 9 and a needle valve 10 installed in series with it. The dedicated combustion circuits 11 are each independently connected in parallel. 12 is the above six combustion circuits 5.8.1
A fuel supply source connected to 1.
溶湯保持専用燃焼回路５のニードル弁４は、溶湯を保持
するために必要十分な量の燃料を、バーナー１に供給し
得るように設定されている。The needle valve 4 of the combustion circuit 5 dedicated to holding the molten metal is set so as to be able to supply the burner 1 with a sufficient amount of fuel to hold the molten metal.
また、着火補助燃焼回路８のニードル弁７は、溶湯保持
専用燃焼回路５より供給される燃料の量に加えて、安定
した着火を得るために必要な量の燃料を、着火時におい
てバーナー１に補助的に供給し得るように設定されてい
る。さらに、昇温専用燃焼回路１１のニードル弁１０は
、溶湯保持専用燃焼回路５より供給される燃料量とあわ
せて、バーナー１の最大能力に見合った大量の燃料を、
バーナー１に供給し得るように設定されている。Further, the needle valve 7 of the auxiliary ignition combustion circuit 8 supplies the burner 1 with the amount of fuel necessary to obtain stable ignition in addition to the amount of fuel supplied from the molten metal retention combustion circuit 5. It is set up so that it can be supplied supplementally. Furthermore, the needle valve 10 of the combustion circuit 11 dedicated to temperature rise, together with the amount of fuel supplied from the combustion circuit 5 dedicated to molten metal retention, supplies a large amount of fuel commensurate with the maximum capacity of the burner 1.
It is set so that it can be supplied to the burner 1.
１６はバーナー１に接続された燃焼用エア供給源で、バ
ーナー１とエア供給源１６の間には、ダンパー等の流量
制御機器１４が配設されている。16 is a combustion air supply source connected to the burner 1, and between the burner 1 and the air supply source 16, a flow rate control device 14 such as a damper is disposed.
エア供給源１３のエアは、バーナー１へ実際に供給され
ている燃焼量に応じた量に、流量制御機器１４により制
御された後、バーナー１へ供給すれるようになっている
。Air from the air supply source 13 is controlled by a flow rate control device 14 to an amount corresponding to the amount of combustion actually supplied to the burner 1, and then supplied to the burner 1.
したがって、着火時においては、溶湯保持専用燃焼回路
５の電磁弁６および着火補助燃焼回路８の電磁弁６を開
、昇温専用燃焼回路１１の電磁弁９を閉とすることによ
シ、燃料供給源１２の燃料は溶湯保持専用燃焼回路５お
よび着火補助燃焼回路８を経由してバーナー１に供給さ
れ、安定した着火が得られる。Therefore, at the time of ignition, by opening the solenoid valve 6 of the molten metal holding combustion circuit 5 and the solenoid valve 6 of the ignition auxiliary combustion circuit 8, and closing the solenoid valve 9 of the temperature raising combustion circuit 11. The fuel from the supply source 12 is supplied to the burner 1 via the molten metal holding dedicated combustion circuit 5 and the ignition auxiliary combustion circuit 8, thereby achieving stable ignition.
バーナー１の着火状態は火炎検知器２により確認される
。火炎検知器２によりバーナー・１の着火が確認された
後は、着火補助燃焼回路８の電磁弁６を閉とし、溶湯保
持専用燃焼回路５のみから、溶湯を保持するのに最適な
量の燃料をバーナー１に安定供給する。The ignition state of the burner 1 is confirmed by a flame detector 2. After the ignition of the burner 1 is confirmed by the flame detector 2, the solenoid valve 6 of the auxiliary ignition combustion circuit 8 is closed, and the optimum amount of fuel for retaining the molten metal is supplied only from the combustion circuit 5 exclusively for molten metal retention. is stably supplied to burner 1.
この後、空炉昇温時あるいは溶湯温度低下時には、昇温
専用燃焼回路１１の電磁弁９を開とし、溶湯保持専用燃
焼回路５のみならず昇温専用燃焼回路１１からも大量の
燃料を供給することで、バーナー１の燃焼能力を最大に
発揮させる。これにより、空炉昇温時間あるいは溶湯温
度の復旧時間を最短にすることができる。After this, when the temperature of the empty furnace is rising or the temperature of the molten metal is decreasing, the solenoid valve 9 of the combustion circuit 11 dedicated to heating is opened, and a large amount of fuel is supplied not only from the combustion circuit 5 dedicated to holding the molten metal but also from the combustion circuit 11 dedicated to heating. By doing so, the combustion capacity of burner 1 is maximized. Thereby, the time for heating up the empty furnace or the time for restoring the molten metal temperature can be minimized.
（発明の効果）
本発明によれば、燃焼制御回路の構成が簡単であるため
、低コストで保全性が向上するばかりでなく、溶湯保持
中の燃料供給量が最適に制御されることにより、溶湯保
持における燃費の大幅な低減を達成すると共に、溶湯温
度のバラツキを極力小さくすることができる。しかも、
着火時には安定した着火が確保されると共に、空炉昇温
時間および異常時の溶湯温度の復旧時間を従来のものに
較べて短縮できる。さらに、本発明においては、溶湯を
保持するための燃焼回路と、着火を補助するための燃焼
回路をそれぞれ専用化１−２だので、各燃焼回路に設け
られるニードル弁等の調整が容易になり、調整ミスによ
る燃焼のトラブルを未然に極力防止できる。(Effects of the Invention) According to the present invention, since the configuration of the combustion control circuit is simple, not only is the cost low and maintainability improved, but also the amount of fuel supplied while holding the molten metal is optimally controlled. It is possible to achieve a significant reduction in fuel consumption during molten metal retention, and to minimize variations in molten metal temperature. Moreover,
At the time of ignition, stable ignition is ensured, and the time for heating up the empty furnace and the time for restoring the molten metal temperature in the event of an abnormality can be shortened compared to conventional ones. Furthermore, in the present invention, the combustion circuit for holding the molten metal and the combustion circuit for assisting ignition are each dedicated 1-2, making it easy to adjust the needle valves etc. provided in each combustion circuit. , it is possible to prevent combustion troubles due to adjustment errors as much as possible.
図は本発明の一実施例を示す燃焼制御回路図である。 １・・・バーナー ２・・・火炎検知器 ５・・・溶湯保持専用燃焼回路 ８・・・着火補助燃焼回路 １１・・・昇温専用燃焼回路 特許出願人 トヨタ自動車株式会社 （ほか１名） The figure is a combustion control circuit diagram showing one embodiment of the present invention. 1... Burner 2...Flame detector 5... Combustion circuit dedicated to holding molten metal 8...Ignition auxiliary combustion circuit 11... Combustion circuit dedicated to temperature rise Patent applicant: Toyota Motor Corporation (1 other person)
Claims (1)
バーナーに、溶湯を保持するのに最適な量の燃料を供給
するための溶湯保持専用燃焼回路と、該溶湯保持専用燃
焼回路よシ供給される燃料量に加えて、安定した着火に
必要な量の燃料を着火時のみに補助供給するための着火
補助燃焼回路と、前記溶湯保持専用燃焼回路より供給さ
れる燃料に加えて、空炉昇温時間および溶湯温度低下時
における溶湯温度の復旧時間を最短にするのに必要な大
量の燃料を供給するための昇温専用燃焼回路とをそれぞ
れ独立して接続させたことを特徴とする溶湯保持炉の燃
焼制御回路。(1) A combustion circuit dedicated to holding the molten metal to supply the optimum amount of fuel to hold the molten metal to a single burner equipped with a flame detector to confirm ignition, and a combustion circuit dedicated to holding the molten metal. In addition to the amount of fuel that is normally supplied, there is an ignition auxiliary combustion circuit that supplements the amount of fuel necessary for stable ignition only at the time of ignition, and in addition to the fuel that is supplied from the molten metal holding dedicated combustion circuit. , is characterized by the fact that it is independently connected to a dedicated combustion circuit for heating up the furnace to supply the large amount of fuel necessary to minimize the time for heating up the empty furnace and the time for restoring the molten metal temperature when the molten metal temperature drops. Combustion control circuit for a molten metal holding furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58203244A JPS6096828A (en) | 1983-10-29 | 1983-10-29 | Combustion control circuit for molten metal retaining furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58203244A JPS6096828A (en) | 1983-10-29 | 1983-10-29 | Combustion control circuit for molten metal retaining furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6096828A true JPS6096828A (en) | 1985-05-30 |
| JPH0437327B2 JPH0437327B2 (en) | 1992-06-19 |
Family
ID=16470817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58203244A Granted JPS6096828A (en) | 1983-10-29 | 1983-10-29 | Combustion control circuit for molten metal retaining furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6096828A (en) |
-
1983
- 1983-10-29 JP JP58203244A patent/JPS6096828A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0437327B2 (en) | 1992-06-19 |
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