JPS5896916A - Controlling method of hot blast stove - Google Patents

Controlling method of hot blast stove

Info

Publication number
JPS5896916A
JPS5896916A JP56195075A JP19507581A JPS5896916A JP S5896916 A JPS5896916 A JP S5896916A JP 56195075 A JP56195075 A JP 56195075A JP 19507581 A JP19507581 A JP 19507581A JP S5896916 A JPS5896916 A JP S5896916A
Authority
JP
Japan
Prior art keywords
flue
hot blast
control unit
damper
degree
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.)
Pending
Application number
JP56195075A
Other languages
Japanese (ja)
Inventor
Yoshiaki Takeda
竹田　義明
Shuichi Saito
修一 斉藤
Masaji Watanabe
正次 渡辺
Kenichi Ogawa
小川　謙市
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP56195075A priority Critical patent/JPS5896916A/en
Publication of JPS5896916A publication Critical patent/JPS5896916A/en
Pending legal-status Critical Current

Links

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
    • F23N3/02—Regulating draught by direct pressure operation of single valves or dampers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/02—Air or combustion gas valves or dampers
    • F23N2235/04—Air or combustion gas valves or dampers in stacks

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)

Abstract

PURPOSE:To control a flow rate of discharged gas and make a thermal loss of each hot blast stoves uniform by a method wherein a damper is arranged at each of the flues of a plurality of hot blast stoves, a draft of each of the flues is sensed and a degree of opening of each damper is adjusted so as to keep each of the drafts constant. CONSTITUTION:A damper 2 is arranged at the flue 11 of each of hot blast stoves 1 and communicated with the chimney 4 through a common flue 3. Each of the flue 11 is provided with a pressure gauge 5, a sensed signal from each of the pressure gauges 5 is sent to a control unit 6. Additional pressure gauge 7 is arranged near the flue 11 and a pressure signal of the surrounding atmosphere is sent to the control unit 6. To the control unit 6 are inputted desired values of temperature, pressure etc. in addition, and each of the outputs of the control unit 6 is connected to an input for each of the dampers 2 so as to adjust a degree of opening of each of the dampers 2. Several input values are compared to each other in the control unit 6, a degree of opening of each of the dampers 2 is adjusted in reference to its output so as to adjust a degree of, i.e. the flow rate of the discharged gas, thereby the thermal loss of each of the hot blast stoves 1 is made uniform.

Description

【発明の詳細な説明】 本発明は、熱風炉の制御方法に関するものである。[Detailed description of the invention] The present invention relates to a method for controlling a hot air stove.

熱風炉とは高炉に送風する空気を予め高温て加熱するた
めの炉であって、蓄熱式熱交換炉の構造をとり、通常高
炉１基に対して３〜４基の熱風炉が設置されている。一
連の熱・風炉は順次加熱されて使用され、排ガスは共通
の煙道をかいして煙突から排気される。A hot blast furnace is a furnace that heats the air sent to the blast furnace to a high temperature in advance, and has the structure of a regenerative heat exchange furnace, and usually 3 to 4 hot blast furnaces are installed for each blast furnace. There is. A series of heat and blast furnaces are heated and used in sequence, and the exhaust gases are exhausted through a common flue and out the chimney.

熱風炉の排ガス温度は、煙突に近いものほど高くなって
いて、排ガスの、熱損失量が大きい。これは、煙突のド
ラフトによって熱風炉の煙道排ガスの流速が変るために
、各熱風炉の排ガス温度に差が生じる。　　゛ 従来の熱風炉では、排ガス温度を３４０℃以下になるよ
うに熱風炉の燃料を調節していた。排ガス温度を３４０
°Ｃ以下に設定した理由は、煙道耐火物の許容温度を考
慮して定めたからである。The temperature of the exhaust gas from a hot blast furnace is higher as it is closer to the chimney, and the heat loss of the exhaust gas is greater. This is because the flow rate of the flue gas of the hot air stove changes due to the draft of the chimney, resulting in a difference in the exhaust gas temperature of each hot air stove. ``In conventional hot air stoves, the fuel in the hot air stove was adjusted to keep the exhaust gas temperature below 340°C. Exhaust gas temperature 340
The reason why it was set below 0.degree. C. was because it was set in consideration of the allowable temperature of the flue refractories.

したがって、本発明の目的は、各熱風炉の排ガス量を制
御することによって各熱風炉の熱損失の均一化を図るこ
とにある。Therefore, an object of the present invention is to equalize the heat loss of each hot-blast stove by controlling the amount of exhaust gas of each hot-blast stove.

本発明の制御方法は、熱風炉の各煙道にダンパを設け、
各熱風炉の煙道のドラフトを一定に保ち。The control method of the present invention includes providing a damper in each flue of the hot air stove,
Keep the flue draft of each hot air stove constant.

煙突に近い熱風炉の排ガス温度上昇を抑制する。Suppresses the temperature rise of exhaust gas from hot stoves near the chimney.

本発明の制御方法を第１図を参照して説明する。The control method of the present invention will be explained with reference to FIG.

各熱風炉ｌの煙道１１にはダンパ２が設けられ、共通の
煙道３をかいして煙突４に連通されている。A damper 2 is provided in the flue 11 of each hot air stove 1, and the damper 2 is connected to a chimney 4 through a common flue 3.

各煙道１１には圧力計５が設けられ、各圧力計５からの
検出信号が制御装置６に送られる。煙道１１の付近には
別の圧力計７．が設けられていて、外気の圧力信号を制
御装置６に送る。Each flue 11 is provided with a pressure gauge 5, and a detection signal from each pressure gauge 5 is sent to a control device 6. There is another pressure gauge 7 near the flue 11. is provided to send a pressure signal of outside air to the control device 6.

制御装置６は上記の各検出信号の他に、温度・圧力等の
設定値が入力され、また、制御装置６の各出力は各ダン
パ２の入力に接続される。制御装置６の各制御信号は各
ダンパの開度を加減する。In addition to the above detection signals, the control device 6 receives set values such as temperature and pressure, and each output of the control device 6 is connected to the input of each damper 2. Each control signal from the control device 6 adjusts the opening degree of each damper.

次に、本発明の制御方法の動作について説明する。例え
ば、煙突４から最も遠い位置にある熱風炉１が作動して
いる場合について説明する。圧力計５が作動中の熱風炉
１の煙道１１内の圧力を検出し制御装置６に送る。制御
装置６には圧力計７からの外気圧力と設定値とが入力さ
れ、これらが比較され、制御信号がダンパ２に送られて
ダンパの開度を加減し、排ガス流量を調節する。Next, the operation of the control method of the present invention will be explained. For example, a case will be described in which the hot air stove 1 located farthest from the chimney 4 is operating. A pressure gauge 5 detects the pressure in the flue 11 of the hot air stove 1 during operation and sends it to the control device 6. The outside air pressure from the pressure gauge 7 and a set value are input to the control device 6, and these are compared, and a control signal is sent to the damper 2 to adjust the opening degree of the damper and adjust the exhaust gas flow rate.

次に、本発明の実施例と従来法との比較結果を第１表に
示す。Next, Table 1 shows the comparison results between the embodiment of the present invention and the conventional method.

第１表からもわかるように、本発明の方法によれば、排
ガスの損失熱量が低減し、燃料が約０．２〜０．３チ節
減される。As can be seen from Table 1, according to the method of the present invention, the amount of heat lost in the exhaust gas is reduced, and fuel is saved by about 0.2 to 0.3 inches.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の方法を示す概略構成図Ｑ１：熱風炉　
　　　　　　２：ダンバ ３：共通煙道　　　　　　４：煙突 ５：圧力計　　　　　　　６二制御装置７：圧力計　　
　　　　１１：煙道Figure 1 is a schematic configuration diagram showing the method of the present invention Q1: Hot air stove
2: Dumper 3: Common flue 4: Chimney 5: Pressure gauge 6 2 Control device 7: Pressure gauge
11: Flue

Claims (1)

【特許請求の範囲】[Claims] 熱風炉の各煙道にダンパを設け、各熱風炉の煙道のドラ
フトを検出し、各ドラフトを一定に保つように各ダンパ
の開度を調節することを特徴とする熱風炉の制御方法。A method for controlling a hot-blast stove, characterized by providing a damper in each flue of the hot-blast stove, detecting the draft of the flue of each hot-blast stove, and adjusting the opening degree of each damper so as to keep each draft constant.
JP56195075A 1981-12-03 1981-12-03 Controlling method of hot blast stove Pending JPS5896916A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56195075A JPS5896916A (en) 1981-12-03 1981-12-03 Controlling method of hot blast stove

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56195075A JPS5896916A (en) 1981-12-03 1981-12-03 Controlling method of hot blast stove

Publications (1)

Publication Number Publication Date
JPS5896916A true JPS5896916A (en) 1983-06-09

Family

ID=16335129

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56195075A Pending JPS5896916A (en) 1981-12-03 1981-12-03 Controlling method of hot blast stove

Country Status (1)

Country Link
JP (1) JPS5896916A (en)

Similar Documents

Publication Publication Date Title
US4942832A (en) Method and device for controlling NOx emissions by vitiation
CA1266653A (en) Apparatus and method for the flow control of flue gas to combustion air in a regenerative heating system
JPS5896916A (en) Controlling method of hot blast stove
US4311456A (en) Blast furnace stove
CN107917424A (en) A kind of Two-cuff Technique burner smoke evacuation automatic control system and its smoke exhaust method
JPS5823527B2 (en) Kinnetsuronadoniokeru
JP7115995B2 (en) Furnace pressure control method for continuous heating furnace, furnace pressure control device, and continuous heating furnace
EP0172791B1 (en) A unit for regenerating the heat produced by exhaust gases in movable hearth furnaces used for baking or rebaking carbonaceous materials
KR100334581B1 (en) Cooling system of the exhaust gas in the annealing furnace
JPH07190627A (en) Tunnel type continuous baking furnace
CN103134314A (en) Energy-saving carbon anode calcination system and method thereof
CN206222910U (en) A kind of energy-saving automatic kiln
CN2237826Y (en) Controllable waste heat low-temp temper furnace
CN201842854U (en) Hot blast stove flue thermal compensation device
JPS61119987A (en) Method of controlling furnace pressure of continuous type heating furnace
JPH09209015A (en) High-efficient combustion control method for hot blast stove
JPH09209032A (en) Method for controlling optimum furnace pressure in heating furnace
JPH0762352A (en) Control of pressure in oven of coke oven equipment
Singh et al. Improvements in Hot Blast Stoves of Blast Furnaces of Rourkela Steel Plant
JPH0726135B2 (en) Hot stove temperature control device
JPH0861620A (en) Heat accumulating type alternate firing device
JPS5798582A (en) Method for raising temperature of hot stacked and replaced wall of coke oven
SU924112A1 (en) Method for cooling down blast furnace air heater before overhaul
JPH0227325Y2 (en)
JP3958942B2 (en) Exhaust gas circulation system for regenerative burner