JPH0437327B2 - - Google Patents
Info
- Publication number
- JPH0437327B2 JPH0437327B2 JP58203244A JP20324483A JPH0437327B2 JP H0437327 B2 JPH0437327 B2 JP H0437327B2 JP 58203244 A JP58203244 A JP 58203244A JP 20324483 A JP20324483 A JP 20324483A JP H0437327 B2 JPH0437327 B2 JP H0437327B2
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- combustion
- ignition
- fuel
- amount
- 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.)
- Expired - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 claims description 64
- 239000002184 metal Substances 0.000 claims description 53
- 239000000446 fuel Substances 0.000 claims description 39
- 238000010438 heat treatment Methods 0.000 claims description 11
- 230000014759 maintenance of location Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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)
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 (Field of Industrial Application) 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、着火用のパイロツ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つては、
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
非常に高価になつている。(Prior Art) Conventionally, in the case of a combustion furnace having a pilot burner for ignition and a main burner for combustion control,
Combustion conditions are controlled by a control motor, on-off valve, etc. However, according to this control method,
Since a control motor, an on-off valve, etc. must be installed, the combustion circuit is complicated and 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ば
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 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
熱料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つて、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ためには、バーナー
の能力自体を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 heating charge, that is, the amount of fuel supplied necessary to hold the molten metal, will be reduced, and the amount of heat dissipated from the furnace wall and the surface of the molten metal 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. Further, if the fuel supply amount is set to an 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, and ignition will become unstable. In order to solve the above problems, the capacity of the burner itself may be reduced, 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ための着火
補助燃料回路と、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 fuel circuit that supplements the amount of fuel only at the time of ignition and the combustion circuit dedicated to holding the molten metal, the time required to raise the temperature of the empty furnace and the time to restore 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）
したがつて、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つて安
定した着火が得られる。火災検知器によつて着火
を確認した後は、着火補助燃焼回路からの燃料供
給を停止し、溶湯保持専用燃焼回路のみからバー
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つて
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 fire detector, the fuel supply from the ignition auxiliary combustion circuit is stopped, and the molten metal is maintained by stably supplying fuel to the burner only from the molten metal retention combustion circuit. After that, when the temperature of the empty 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 heating up, thereby reducing the heating time of the empty furnace and the temperature of the molten metal. The recovery time can be minimized. As described above, according to the present invention, an optimal amount of fuel can be supplied while the molten metal is being held, so that the molten metal holding fuel efficiency is improved and variations in the molten metal temperature can be suppressed as much as possible.
（実施例）
以下に、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つて、着
火を確認するための火災検知器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１
０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３つの
燃焼回路５，８，１１に接続された燃料供給源で
ある。(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a burner provided in a combustion furnace, and is equipped with a fire detector 2 for confirming ignition. This one burner 1 includes a combustion circuit 5 dedicated to holding molten metal, which is made up of a solenoid valve 3 and a needle valve 4 installed in series with it, and an ignition circuit made up of a solenoid valve 6 and a needle valve 7 installed in series with it. Auxiliary combustion circuit 8, solenoid valve 9, and needle valve 1 installed in series therewith
Combustion circuits 11 dedicated to temperature increase consisting of 0 and 0 are each independently connected in parallel. 12 is a fuel supply source connected to the three combustion circuits 5, 8, and 11.
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。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の最大能力に見合つた大量の燃料を、バー
ナー１に供給し得るように設定されている。 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 necessary and sufficient amount of fuel to hold the molten metal. In addition to the amount of fuel supplied from the molten metal retention combustion circuit 5, 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 at the time of ignition. 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 is configured to supply the burner 1 with a large amount of fuel corresponding to the maximum capacity of the burner 1, together with the amount of fuel supplied from the combustion circuit 5 dedicated to molten metal retention. is set to .
１３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１３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。
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へ供給され
るようになつている。 13 is a combustion air supply source connected to the burner 1; between the burner 1 and the air supply source 13, a flow control device 14 such as a damper is disposed.
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.
したがつて、着火時においては、溶湯保持専用
燃焼回路５の電磁弁３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り、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, the solenoid valve 3 of the molten metal retention combustion circuit 5 and the ignition auxiliary combustion circuit 8
By opening the solenoid valve 6 and closing the solenoid valve 9 of the combustion circuit 11 dedicated to heating, the fuel in the fuel supply source 12 is supplied to the burner 1 via the combustion circuit 5 dedicated to molten metal retention and the ignition auxiliary combustion circuit 8. supply, and stable ignition can be obtained.
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 only the molten metal holding combustion circuit 5 is operated.
Burner 1 has the optimum amount of fuel to hold the molten metal.
Stable supply to.
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 increases or the temperature of the molten metal decreases, the solenoid valve 9 of the combustion circuit 11 dedicated to temperature increase is opened.
By supplying a large amount of fuel not only from the molten metal holding combustion circuit 5 but also from the temperature raising combustion circuit 11, the combustion capacity of the 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したので、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. Furthermore, stable ignition is ensured at the time of ignition, 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 in ignition are each dedicated, making it easy to adjust the needle valves etc. installed in each combustion circuit, thereby preventing combustion troubles due to adjustment errors. It can be prevented 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。
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.
Claims (1)
本のバーナーに、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 Equipped with a flame detector to confirm ignition
A combustion circuit dedicated to holding the molten metal to supply the optimum amount of fuel to the book burner to hold the molten metal,
an ignition auxiliary combustion circuit for supplementally supplying the amount of fuel necessary for stable ignition only at the time of ignition, in addition to the amount of fuel supplied from the combustion circuit dedicated to holding the molten metal;
In addition to the fuel supplied from the combustion circuit dedicated to holding the molten metal, a combustion circuit dedicated to heating the molten metal is used to supply a large amount of fuel necessary to minimize the heating time of the empty furnace and the time to restore the molten metal temperature when the molten metal temperature drops. A combustion control circuit for a molten metal holding furnace, characterized in that the combustion circuits are each independently connected.
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 JPS6096828A (en) | 1985-05-30 |
| JPH0437327B2 true 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 |
|---|---|
| JPS6096828A (en) | 1985-05-30 |
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