JPS61264127A - Heater for furnace - Google Patents
Heater for furnaceInfo
- Publication number
- JPS61264127A JPS61264127A JP5979486A JP5979486A JPS61264127A JP S61264127 A JPS61264127 A JP S61264127A JP 5979486 A JP5979486 A JP 5979486A JP 5979486 A JP5979486 A JP 5979486A JP S61264127 A JPS61264127 A JP S61264127A
- Authority
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- Japan
- Prior art keywords
- burners
- burner
- firing
- furnace
- 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.)
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Abstract
Description
【発明の詳細な説明】
この発明は鉄や鋼等の熱処理に使用する炉を効率よく加
熱すると共に排ガス中の有害成分を少なくした炉の加熱
装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a furnace heating device that efficiently heats a furnace used for heat treatment of iron, steel, etc. and reduces harmful components in exhaust gas.
バッチ式の加熱炉の場合、加熱初期には燃焼量が最大で
あり、大量の燃焼ガスが炉内を循環するが、その後徐々
に燃焼量は減少し、均熱加熱時には初期加熱時の1/1
0〜1 /100の熱量しか必要としない。この熱量減
少方法として空気と燃料の両方を絞る定空燃比燃焼シス
テムが既に使用されているが、燃焼量の減少とともに温
度の均一性保持に問題が生じる。また、空気を最大燃焼
時の量で固定し、単に燃料量のみを減じてゆく定空気燃
焼システムも既に使用されているが、均熱加熱時におけ
る燃焼効率が悪い。更に、全部のバーナーを一斉にオン
・オフするインパルス燃焼システムも既に使用されてい
るが、均熱加熱時におけるバーナーのオフ時間が長(且
つこのオフ時間中炉内ガスの循環が行なわれないので炉
内温度の均一化を図ることが困難である。更にまた、特
殊ノズルを使用し、定空気燃焼システムと定空燃比燃焼
システムとを組合わせた特殊なシステムも知られている
が、構造が複雑化し且つ低燃焼時における燃焼効率の向
上にいま一歩の感がある。この発明は、このような問題
点を解決するためなされたものである。In the case of a batch-type heating furnace, the amount of combustion is at its maximum at the beginning of heating, and a large amount of combustion gas circulates in the furnace, but after that, the amount of combustion gradually decreases, and during soaking heating, the amount of combustion is 1/1 of the initial heating. 1
It requires only 0 to 1/100 of the amount of heat. As a method for reducing the amount of heat, a constant air-fuel ratio combustion system that throttles both air and fuel has already been used, but as the amount of combustion decreases, problems arise in maintaining temperature uniformity. Furthermore, constant air combustion systems have already been used in which the amount of air is fixed at the maximum combustion level and only the amount of fuel is reduced, but this system has poor combustion efficiency during uniform heating. Furthermore, impulse combustion systems in which all burners are turned on and off at the same time are already in use, but the burner off time during soaking heating is long (and the gas in the furnace is not circulated during this off time). It is difficult to equalize the temperature inside the furnace.Furthermore, a special system is known that uses a special nozzle and combines a constant air combustion system and a constant air fuel ratio combustion system, but the structure is There is a feeling that there is still a step forward in improving the combustion efficiency at times of complicated combustion and low combustion.The present invention was made to solve these problems.
第1図乃至第8図に基いてこの発明の第1の実絶倒を説
明する。The first embodiment of this invention will be explained based on FIGS. 1 to 8.
9は加熱炉、10は加熱炉9の炉室、1,2゜3は第1
図及び第2図において炉室10の右側に設けた高速ジェ
ットバーナー、4.5.6は同じく第1図及び第2図に
おいて炉室10の左側に設けた高速ジェットバーナーで
、炉9の長手方向に沿って左右のバーナーは順次食違わ
せて配置されている。これらのバーナーは、オン状態の
燃焼中は最大の空気噴出量及び最大の燃料噴出量におけ
る定空燃比燃焼を行うようになっており、またオフ状態
においては空気も燃料もいずれも噴出しないようになっ
ている。以後このようなバーナーをオン・オフ作動バー
ナーと呼ぶ。炉室10内に向って開口するオン・オフ作
動バーナー1〜6は、この実施例においては6本設けて
あり、5つの段階的制御を行っている。 ′
第3図は第1制御段状態を示すグラフで、横軸に時間を
縦軸に各バーナーをとっである。そして線の部分が点火
燃焼中を示している。Tが1単位、6単位が1周期りで
、各バーナーはそれぞれ1単位を分担して点火するよう
になっている。しがち各バーナーは自己の分担時間中、
オン・オフを行うようになっている。そしてオンの時間
を短くし、オフの時間を長くすれば、バーナーフレーム
の大きさは同一でも分担時間中における発熱量は少くな
り(たとえば第8図における位置A)、またオンの時間
を長くし、オフの時間を短くすれば、分担時間中におけ
る発熱量は多くなる(たとえば第8図における位置B)
。この第1制御段で0から最大発熱量の1/6までの発
熱を行う。9 is the heating furnace, 10 is the furnace chamber of the heating furnace 9, and 1, 2° 3 is the first
The high-speed jet burner 4.5.6, which is installed on the right side of the furnace chamber 10 in FIGS. 1 and 2, is the high-speed jet burner installed on the left side of the furnace chamber 10 in FIGS. The left and right burners are sequentially staggered along the direction. These burners are designed to perform constant air-fuel ratio combustion with the maximum air jetting amount and maximum fuel jetting amount during combustion in the on state, and so that neither air nor fuel is jetted out in the off state. It has become. Hereinafter, such burners will be referred to as on-off operating burners. In this embodiment, there are six on-off operating burners 1 to 6, which open into the furnace chamber 10, and are controlled in five steps. ' Figure 3 is a graph showing the state of the first control stage, with time plotted on the horizontal axis and each burner plotted on the vertical axis. The lined portion indicates ignition combustion. T is one unit, 6 units is one cycle, and each burner is designed to ignite one unit each. Each burner tends to have its own share of time,
It is designed to be turned on and off. If you shorten the on time and lengthen the off time, the amount of heat generated during the shared time will decrease even if the size of the burner frame is the same (for example, position A in Figure 8), and if you lengthen the on time, , if the off time is shortened, the amount of heat generated during the shared time will increase (for example, position B in Figure 8).
. In this first control stage, heat is generated from 0 to 1/6 of the maximum heat generation amount.
第4図は第2制御段状態を示すグラフで、6単位Tを1
周期りとし、各単位を2本のバーナーが組になり、組を
構成する一方のバーナーはオンを保ち(以後オン維持バ
ーナーという)且つ他方のバーナーはオン・オフすると
共にオフの時間割合を変えることにより発熱量の調整を
行う。この場合、1周期中に各バーナーは1回のオン継
続と1回のオン・オフを分担する。この第2制御段で、
最大発熱量の1/6〜2/6の発熱を行う。Figure 4 is a graph showing the state of the second control stage, where 6 units T are
Each unit has a set of two burners, and one burner in the set remains on (hereinafter referred to as the "on-keeping burner"), and the other burner changes the off time ratio as it turns on and off. This adjusts the amount of heat generated. In this case, each burner is responsible for one continuous turn-on and one turn-off during one cycle. In this second control stage,
Generates 1/6 to 2/6 of the maximum calorific value.
第5図は第3制御段状態を示すグラフで、2単位Tが1
周期しとなり、各単位を2本のオン維持バーナーと、1
本のオン・オフ作動バーナーとによって発熱量の調整を
行う。この第3制御段で、最大発熱量の2/6〜3/6
の発熱を行う。FIG. 5 is a graph showing the state of the third control stage, where 2 units T is 1
Each unit has two keep-on burners and one
The amount of heat generated is adjusted by the on/off operation of the burner. In this third control stage, 2/6 to 3/6 of the maximum calorific value
generates fever.
第6図は第4制御段状態を示すグラフで、2単位Tが1
周期りとなり、各単位を3本のオン維持バーナーと、1
本のオン・オフ作動バーナーとによって発熱量の調整を
行う、この第4制御段で、最大発熱量の3/6〜4/6
の発熱を行う。FIG. 6 is a graph showing the state of the fourth control stage, where 2 units T is 1
Each unit has 3 on burners and 1
This fourth control stage adjusts the amount of heat generated by the on/off operation burner.
generates fever.
第7図は第5制御段状態を示すグラフで、1単位Tが1
周期しとなり、各単位を4本のオン維持バーナーと、2
本のオン・オフ作動バーナーとによって発熱量の調整を
行う。この第5制御段で、最大発熱量の4/6〜6/6
の発熱を行う(なお、この制御段は4/6〜5/6と5
/6〜6/6の2つの段階に分けることが出来る)。FIG. 7 is a graph showing the state of the fifth control stage, where 1 unit T is 1
Each unit has 4 burners to keep it on and 2
The amount of heat generated is adjusted by the on/off operation of the burner. In this fifth control stage, 4/6 to 6/6 of the maximum calorific value
(This control stage generates heat from 4/6 to 5/6 and 5/6.
It can be divided into two stages: /6 to 6/6).
第8図は制御段と燃焼量との関係を示すグラフで、横軸
に制御段をまた縦軸に燃焼量をとっている。1. 2.
3. 4. 5はそれぞれ制御段数を示し、斜線で囲
まれた部分がオン維持バーナーによる燃焼を表わし、斜
めの点線の部分と前記斜線で囲まれた部分との間がオン
・オフ作動バーナーによる燃焼部分を表わしている。FIG. 8 is a graph showing the relationship between the control stage and the combustion amount, with the horizontal axis representing the control stage and the vertical axis representing the combustion amount. 1. 2.
3. 4. 5 indicates the number of control stages, the area surrounded by diagonal lines represents the combustion by the on-maintenance burner, and the area between the diagonal dotted line and the area surrounded by the diagonal line represents the combustion part by the on-off operating burner. ing.
第9図乃至第17図に基いてこの発明の第2の実施例を
説明する。A second embodiment of the present invention will be explained based on FIGS. 9 to 17.
この実施例のものにおいては、炉室10の左天井バーナ
ー17.右側壁バーナー11.左側壁バーナー13.右
天井バーナー15.左天井バーナー18.右側壁バーナ
ー12.左側壁バーナー14、右天井バーナーi6が、
炉室10の長手方向に沿って順次ずらせて配置されてい
る。そして側壁バーナー11.12,13.14は天井
バーナー15.16,17.18の能力の1/2の出力
に設定されている。In this embodiment, the left ceiling burner 17 of the furnace chamber 10. Right side wall burner 11. Left side wall burner 13. Right ceiling burner 15. Left ceiling burner 18. Right side wall burner 12. The left wall burner 14 and the right ceiling burner i6 are
They are arranged to be sequentially shifted along the longitudinal direction of the furnace chamber 10. The side wall burners 11.12 and 13.14 are set to output half the capacity of the ceiling burners 15.16 and 17.18.
第11図は第1制御段状態を示すグラフで、4単位T7
!J(1周期りとなり、各単位を4本の側壁バーナーが
順次1本ずつオン・オフすることによって発熱量の調整
を行う。この第1制御段で、最大発熱量のO〜1/12
の発熱を行う。FIG. 11 is a graph showing the state of the first control stage, with 4 units T7
! J (This is one cycle, and the amount of heat generated is adjusted by sequentially turning on and off the four side wall burners for each unit one by one. In this first control stage, the amount of heat generated is adjusted from 0 to 1/12 of the maximum amount of heat generated.
generates fever.
第12図は第2制御段状態を示すグラフで、6単位Tが
1周期りとなり、4本の側壁バーナーが、各単位を1本
のオン維持側壁バーナーと1本のオン・オフ作動側壁バ
ーナーとによって発熱量の調整を行う。この第2制御段
で、最大発熱量の1/12〜2/12の発熱を行う。Figure 12 is a graph showing the state of the second control stage, with 6 units T in one cycle, 4 sidewall burners, 1 keep-on sidewall burner for each unit, and 1 on/off operation sidewall burner. The amount of heat generated is adjusted by In this second control stage, heat is generated between 1/12 and 2/12 of the maximum heat amount.
第13図は第3制御段状態を示すグラフで、2単位Tが
1周期しとなり、4本の側壁バーナーが、各単位をそれ
ぞれ2本のオン維持側壁バーナーと2本のオン・オフ作
動側壁バーナーとによって発熱量の調整を行う。この第
3制御段で、最大発熱量の2/12〜4/12の発熱を
行う。Figure 13 is a graph showing the state of the third control stage, in which two units T make one cycle, four side wall burners are connected to each unit, two keep-on side wall burners and two on/off operating side walls. The amount of heat generated is adjusted by the burner. In this third control stage, heat is generated from 2/12 to 4/12 of the maximum heat amount.
第14図は第4制御段状態を示すグラフで、2単位Tが
1周期しとなり、2本のオン・オフ作動側壁バーナーと
2本のオン維持天井バーナーとによって発熱量の調整を
行う。この第4制御段で、最大発熱量の4/12〜6/
12の発熱を行う。FIG. 14 is a graph showing the state of the fourth control stage, where two units T correspond to one cycle, and the amount of heat generated is adjusted by two on/off operating side wall burners and two on-maintaining ceiling burners. In this fourth control stage, 4/12 to 6/6 of the maximum calorific value is
Perform 12 fevers.
第15図は第5制御段状態を示すグラフで、2単位Tが
1周期しとなり、各単位をそれぞれ2本のオン維持側壁
バーナー、2本のオン・オフ作動側壁バーナー、2本の
オン維持天井バーナーとによって発熱量の調整を行う。Fig. 15 is a graph showing the state of the fifth control stage, where two units T make one cycle, each unit has two sidewall burners kept on, two sidewall burners operating on/off, and two sidewall burners kept on. The amount of heat generated is adjusted using the ceiling burner.
この第5制御段で、最大発熱量の6/12〜8/12の
発熱を行う。In this fifth control stage, heat is generated from 6/12 to 8/12 of the maximum heat amount.
第16図は第6制御段状態を示すグラフで、4本のオン
・オフ作動側壁バーナーと4本のオン維持天井バーナー
とによって発熱量の調整を行う。FIG. 16 is a graph showing the state of the sixth control stage, in which the amount of heat generated is adjusted by four on-off operating side wall burners and four on-maintaining ceiling burners.
この第6制御段で、最大発熱量の8/12〜12/12
の発熱を行う。In this sixth control stage, 8/12 to 12/12 of the maximum calorific value
generates fever.
第17図は、第1実施例の第8図相当図で、実線で囲ま
れた部分が天井バーナーによる範囲を、ソノ他の部分が
側壁バーナーによる範囲を表わしている。FIG. 17 is a diagram corresponding to FIG. 8 of the first embodiment, in which the area surrounded by solid lines represents the area covered by the ceiling burner, and the other areas represent the area covered by the side wall burner.
上述した如くこの発明に係る炉の加熱装置は着火中は燃
焼効率のよい定空燃比で而も全負荷運転する複数個の高
速ジェットバーナーを炉室内に開口させ、燃焼量をバー
ナー着火本数によって段階的に制御可能にすると共に、
着火バーナーがあらかじめ定められた着火組合わせによ
って決まり、而も組合わせが必要に応じ周期的に順次切
換わり、且つ各周期中においては着火中の少くとも一部
のバーナーが必要熱量に応じて定まる時間間隔でオン・
オフするようにしたものである。As described above, the furnace heating device according to the present invention opens a plurality of high-speed jet burners in the furnace chamber that operate at a constant air-fuel ratio with high combustion efficiency and at full load during ignition, and the combustion amount is adjusted in stages according to the number of ignited burners. In addition to making it possible to control
The ignition burners are determined by a predetermined ignition combination, and the combinations are periodically and sequentially switched as necessary, and during each cycle, at least some of the burners being ignited are determined according to the required amount of heat. On/off at time intervals
It was designed to be turned off.
全燃焼範囲に亙って燃焼効率の最も高い空燃比で燃焼を
行い、且つ使用バーナーが高速ジェットバーナーなので
大量の伴流ガスが炉内を攪拌し昇温・灼熱期を通じて温
度の均一化を確保することが出来る。また着火バーナー
は予め定められた順序に従って交番燃焼を行うため、局
処加熱もなく、全範囲に亙って省エネルギー操業及び低
公害(特にNOxの発生が少ない)操業が可能である。Combustion is performed at the air-fuel ratio with the highest combustion efficiency over the entire combustion range, and since the burner used is a high-speed jet burner, a large amount of wake gas stirs the inside of the furnace, ensuring uniform temperature throughout the heating and scorching periods. You can. In addition, since the ignition burner performs alternating combustion according to a predetermined order, there is no localized heating, and energy-saving operation and low-pollution operation (particularly low NOx generation) is possible over the entire range.
第1図乃至第8図はこの発明に係る炉の加熱装置の第1
の実施例を説明するためのもので、第1図は炉の概略正
面図、第2図は同上平面図、第3図は第1制御段の作動
状態を示すグラフ、第4図は第2制御段の作動状態を示
すグラフ、第5図は第3制御段の作動状態を示すグラフ
、第6図は第4制御段の作動状態を示すグラフ、第7図
は第5制御段の作動状態を示すグラフ、第8図は制御段
と燃焼量との関係を示すグラフである。第9図乃至第1
7図はこの発明に係る炉の加熱装置の第2の実施例を説
明するためのもので、第9図は炉の概略正面図、第10
図は同上平面図、第11図は第1制御段の作動状態を示
すグラフ、第12図は第2制御段の作動状態を示すグラ
フ、第13図は第3制御段の作動状態を示すグラフ、第
14図は第4制御段の作動状態を示すグラフ、第15図
は第5制御段の作動状態を示すグラフ、第16図は第6
制御段の作動状態を示すグラフ、第17図は制御段と燃
焼量との関係を示すグラフである。
1 バーナー
2 バーナー
3 バーナー
4 バーナー
5 バーナー
6 バーナー
9 加熱炉
10 炉室
11 バーナー
12 バ′−ナー
13 バーナー
14 バーナー
15 バーナー
16 バーナー
17 バーナー
18 バーナー1 to 8 show a first diagram of a furnace heating device according to the present invention.
Fig. 1 is a schematic front view of the furnace, Fig. 2 is a plan view of the same, Fig. 3 is a graph showing the operating state of the first control stage, and Fig. 4 is a graph showing the operating state of the second control stage. A graph showing the operating state of the control stage, Fig. 5 a graph showing the operating state of the third control stage, Fig. 6 a graph showing the operating state of the fourth control stage, and Fig. 7 a graph showing the operating state of the fifth control stage. FIG. 8 is a graph showing the relationship between the control stage and the combustion amount. Figures 9 to 1
FIG. 7 is for explaining a second embodiment of the furnace heating device according to the present invention, FIG. 9 is a schematic front view of the furnace, and FIG. 10 is a schematic front view of the furnace.
Figure 11 is a graph showing the operating state of the first control stage, Figure 12 is a graph showing the operating state of the second control stage, and Figure 13 is a graph showing the operating state of the third control stage. , Fig. 14 is a graph showing the operating state of the fourth control stage, Fig. 15 is a graph showing the operating state of the fifth control stage, and Fig. 16 is a graph showing the operating state of the fifth control stage.
A graph showing the operating state of the control stage, and FIG. 17 is a graph showing the relationship between the control stage and the combustion amount. 1 Burner 2 Burner 3 Burner 4 Burner 5 Burner 6 Burner 9 Heating furnace 10 Furnace chamber 11 Burner 12 Burner 13 Burner 14 Burner 15 Burner 16 Burner 17 Burner 18 Burner
Claims (1)
複数個の高速ジェットバーナーを炉室内に開口させ、燃
焼量をバーナー着火本数によつて段階的に制御可能にす
ると共に着火バーナーがあらかじめ定められた着火組合
わせによつて決まり而も組合わせが周期的に順次切換わ
り、且つ各周期中においては着火中の少くとも一部のバ
ーナーが必要熱量に応じて定まる時間間隔でオン・オフ
することを特徴とする炉の加熱装置。During ignition, multiple high-speed jet burners that operate at a constant air-fuel ratio with good combustion efficiency and at full load are opened in the furnace chamber, and the combustion amount can be controlled in stages by the number of burners ignited. The ignition combination is determined by a predetermined ignition combination, and the ignition combinations are periodically switched in sequence, and during each cycle, at least some of the burners that are igniting are turned on and off at time intervals determined according to the amount of heat required. Furnace heating device characterized by being turned off.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5979486A JPS61264127A (en) | 1986-03-17 | 1986-03-17 | Heater for furnace |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5979486A JPS61264127A (en) | 1986-03-17 | 1986-03-17 | Heater for furnace |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16595981A Division JPS5867820A (en) | 1981-10-17 | 1981-10-17 | Method for heating furnace |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61264127A true JPS61264127A (en) | 1986-11-22 |
Family
ID=13123539
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5979486A Pending JPS61264127A (en) | 1986-03-17 | 1986-03-17 | Heater for furnace |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61264127A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005156064A (en) * | 2003-11-27 | 2005-06-16 | Miike Iron Works Co Ltd | High-speed pulsating jet burner device |
JP2009155691A (en) * | 2007-12-26 | 2009-07-16 | Nippon Steel Corp | Direct-fire type roller hearth continuous heat-treatment furnace |
-
1986
- 1986-03-17 JP JP5979486A patent/JPS61264127A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005156064A (en) * | 2003-11-27 | 2005-06-16 | Miike Iron Works Co Ltd | High-speed pulsating jet burner device |
JP2009155691A (en) * | 2007-12-26 | 2009-07-16 | Nippon Steel Corp | Direct-fire type roller hearth continuous heat-treatment furnace |
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