JPS605815A - Waste heat recovering installation for hot stove - Google Patents
Waste heat recovering installation for hot stoveInfo
- Publication number
- JPS605815A JPS605815A JP11354283A JP11354283A JPS605815A JP S605815 A JPS605815 A JP S605815A JP 11354283 A JP11354283 A JP 11354283A JP 11354283 A JP11354283 A JP 11354283A JP S605815 A JPS605815 A JP S605815A
- Authority
- JP
- Japan
- Prior art keywords
- heat medium
- heat
- bypass
- flow rate
- heat exchanger
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
- C21B9/14—Preheating the combustion air
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Air Supply (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は熱風炉排熱回収設備に関し、熱媒によシ熱風炉
俳熱の熱エネルギーの回収を行なう場合、熱交換器へ流
入させる熱媒の温度を一定に保たせることによｆｉ％エ
ネルギーの回収に有効な装置を提供するものである。Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a hot blast furnace exhaust heat recovery equipment, and when recovering thermal energy of hot blast furnace exhaust heat using a heating medium, By keeping the temperature of the medium constant, an apparatus is provided that is effective in recovering fi% energy.
（従来技術）
熱風炉よシの排ガス中の顕熱は熱媒で回収し、この熱媒
を熱風炉用燃料及び燃焼空気の予熱に使用する。即ち第
１図に示すように煙突６へ則した排ガス管５の途中に配
設した熱交換！ＨＥ−１へ連通させた配管１ 、１’中
に熱媒を矢印方向へ循環させることによって排ガス中の
ｇ熱を回収し、熱媒を空気予熱器１（Ｅ−２、燃料ガス
予熱器ＨＥ−３に循環させて燃料空気、燃料ガスの予熱
を行ない、燃料消費欺のＱＩＪ限をはかってきた。１５
は熱媒循環ポンプ、８′はバイパス弁である。しかしな
がら従来は熱交換器ＨＥ−１（７ｑ低温腐食予防という
トリ備保全の面から熱交換器１−ｉＥ−１人口の熱媒温
度が９０℃以上になるように管理をしている。ところが
熱風炉２の運転は１基づつ交互に行なうため熱媒の温度
は嬉２図のように変化する。したがって第２図に示すよ
うに熱媒温度が９０℃以上の部分の斜線部は未回収部分
の熱射であって平均すると８℃佇度の熱量損失を招いて
いた。(Prior Art) Sensible heat in the exhaust gas of a hot-air stove is recovered by a heat medium, and this heat medium is used to preheat fuel for the hot-air stove and combustion air. In other words, as shown in FIG. 1, a heat exchanger is installed in the middle of the exhaust gas pipe 5 that extends to the chimney 6! G-heat in the exhaust gas is recovered by circulating the heat medium in the direction of the arrow in the pipes 1 and 1' connected to the HE-1, and the heat medium is transferred to the air preheater 1 (E-2, fuel gas preheater HE -3 to preheat the fuel air and fuel gas, and have tried to limit the QIJ limit of fuel consumption.15
8 is a heat medium circulation pump, and 8' is a bypass valve. However, in the past, heat exchanger HE-1 (7q) was managed so that the heat medium temperature of heat exchanger 1-iE-1 was 90℃ or higher in order to prevent low-temperature corrosion. Since the furnaces 2 are operated alternately one at a time, the temperature of the heating medium changes as shown in Figure 2.Therefore, as shown in Figure 2, the shaded area where the heating medium temperature is 90°C or higher is the unrecovered portion. This caused a heat loss of 8 degrees Celsius on average.
（発明の目的）
本発明は熱交換器ＨＥ−１人日付近の熱媒温度を９０℃
に保つため供米の未回収分の熱−せを回収することを目
的とする。そのプこめ本発明は（１情度の演算を行ない
熱媒バイパス流量を調ム１１シ熱又挨器入口付近の熱媒
温度を熱交換器の必喪管、Ｌ！！温度の最小限定に保つ
ことによって熱風炉Ｉ′、）１”熱ガスに２ける熱量エ
ネルギーの増、壁をはかる。(Object of the invention) The present invention aims to reduce the temperature of the heat medium near the heat exchanger HE-1 to 90°C.
The purpose is to recover the unrecovered heat from donated rice in order to maintain the temperature. The present invention (1) calculates the temperature of the heat medium near the inlet of the heat exchanger, adjusts the flow rate of the heat medium bypass, and sets the temperature of the heat medium near the inlet of the heat exchanger to the minimum value of the temperature of the heat exchanger. By keeping the hot air stove I') 1" increase in the calorific energy of the hot gas by 2, measure the wall.
（発明の構１戎、・作用） 以下本発明の一冥施例を第３図によって説明する。(Structure 1 of the invention, action) Hereinafter, one embodiment of the present invention will be explained with reference to FIG.
（〜風炉２は燃料ガス供給源３、溶焼を気供給源４と配
管３／、４／で連結している。熱風炉２よシの排ガスは
排ガス管５ヶ通って、煙突６よシ排出される。熱風炉２
と煙突６間を連結する排ガス管５の途中に熱交換器Ｈｇ
−１が配置されている。又熱風炉２と燃料ガス供給源３
とを連通ずる配管３′途中に燃料ガス予熱器ＨＥ −３
が、更に熱風炉２と燃焼空気１ル給源４とを連通ずる配
管４′の途中に空気予熱器ＨＥ−２が配設されている。(~The hot blast furnace 2 is connected to a fuel gas supply source 3 and a combustion gas supply source 4 through piping 3/, 4/. Exhausted.Hot stove 2
A heat exchanger Hg is installed in the middle of the exhaust gas pipe 5 connecting the chimney 6 and the chimney 6.
-1 is placed. Also, hot air stove 2 and fuel gas supply source 3
There is a fuel gas preheater HE-3 in the middle of the pipe 3' that communicates with
However, an air preheater HE-2 is further disposed in the middle of a pipe 4' that communicates the hot blast stove 2 with the combustion air supply source 4.
そして燃料ガス予熱器ＨＥ −３と空気予熱器ＩＩＥ−
２とは前記した熱交換器ＨＥ−１と配管１ 、１’で連
結され、配管ｌと１′はバイパス配け７で連結されてい
る。熱交換器１１Ｅ−１より出た熱媒は前記各予熱器Ｈ
Ｅ−２，ＨＩ！ニー３へ循環させるが、その一部は途中
よシ配管７を通ってバイパスされ各予熱器ＨＥ−２，Ｈ
Ｅ−３からの循環熱媒と混合されるが、熱交換器入側へ
送る熱媒の温度ケ適正に保つため本発明においてはバイ
パス配Ｗ７へ流入する熱媒の量を調節する。And fuel gas preheater HE-3 and air preheater IIE-
2 is connected to the heat exchanger HE-1 described above by pipes 1 and 1', and pipes 1 and 1' are connected by a bypass arrangement 7. The heat medium coming out of the heat exchanger 11E-1 is transferred to each preheater H.
E-2, HI! It is circulated to the knee 3, but a part of it is bypassed through the pipe 7 on the way to each preheater HE-2, H.
Although it is mixed with the circulating heat medium from E-3, in order to keep the temperature of the heat medium sent to the input side of the heat exchanger appropriate, in the present invention, the amount of heat medium flowing into the bypass distribution W7 is adjusted.
そのため本発明ではバイパス配管７に流量調節弁８を設
け、該流量調節弁８を演算器９および熱媒バイパス流量
調節装＋ｔｉｏに電気的に結合している。間して核流吐
調節装置１０はバイパス配管７に配置した熱媒バイパス
流ｊＬｉｉｊ計１１にまた演算器９は熱媒バイパスｉｉ
度計１２に電気的に結合されている。又演算器９は配Ｉ
＃１′の途中とバイパス配管７との連結部７′の前後つ
まりバイパス配管７から流入する熱媒と配管１′を流通
する熱媒の合流点前後の配管１′部に設けられた熱媒温
度側１３゜１６に電気的に結合されている。そして前記
熱媒の合流点７′と熱交換器ＨＥ−１との連通部分の配
管１′の途中に熱媒流量計１４および温度計１７および
熱媒循環ポンプ１５が配置されており熱媒流量計１４は
演算器９に結合されている。Therefore, in the present invention, a flow rate control valve 8 is provided in the bypass pipe 7, and the flow rate control valve 8 is electrically coupled to the computing unit 9 and the heat medium bypass flow rate control device +tio. In between, the nuclear flow discharge adjustment device 10 is connected to the heat medium bypass flow meter 11 disposed in the bypass pipe 7, and the computing unit 9 is connected to the heat medium bypass flow meter 11 arranged in the bypass pipe 7.
It is electrically coupled to the meter 12 . Also, the computing unit 9 is
A heating medium provided in the piping 1' section before and after the connection part 7' between the middle of #1' and the bypass piping 7, that is, before and after the confluence of the heating medium flowing from the bypass piping 7 and the heating medium flowing through the piping 1'. It is electrically coupled to the temperature side 13°16. A heat medium flow meter 14, a thermometer 17, and a heat medium circulation pump 15 are arranged in the middle of the pipe 1' in the communication portion between the heat medium confluence 7' and the heat exchanger HE-1, and the heat medium flow rate is A total of 14 are coupled to the arithmetic unit 9.
本発明では熱風炉２よシ排出する排熱ガスの熱エネルギ
ーを有効に回収するため熱媒流量計１４、熱媒温度計１
３．１６で検知した値Ｑｏ ＊ Ｔｚ ＋ ’几を演喜
器９に入力する。そしてバイパス配管７に配置したバイ
パス流量ｍＡ１１ｉｉｊ計１１の検出出刃を熱媒バイパ
ス流ＬＧＴ 調ＩＡｉ装置１０に入力し、核熱媒バイパ
ス流量Ｗ４節装置１０によシ流量調節弁８の開度調姫を
行なう。セして熱媒バイパス温度計１２で検知した値Ｔ
Ｉも演算器９に入力され、演算器９では次式による演算
を行ない熱交換器１４Ｅ−１へ流入させる熱媒温度を一
定に＝＋＠Ｎ１’ｉする。゛第４図に示すように合流点
７′では流量Ｑｔ １温度ＴＩ、比熱ＣＩの熱媒及び、
流量Ｑｔ 、温度Ｔ、、比熱σ２の熱媒が流入し、流量
Ｑｏ ％温度Ｔｏ、比熱Ｃｏの熱媒となって流出する。In the present invention, in order to effectively recover the thermal energy of the exhaust gas discharged from the hot air stove 2, a heat medium flow meter 14, a heat medium thermometer 1
3. Input the value Qo * Tz + '几 detected in step 16 into the performer 9. Then, the detected value of the bypass flow rate mA11iij meter 11 arranged in the bypass piping 7 is inputted to the heating medium bypass flow LGT adjustment IAi device 10, and the opening degree of the flow rate adjustment valve 8 is adjusted by the nuclear heating medium bypass flow rate W4 adjustment device 10. Do this. The value T detected by the heating medium bypass thermometer 12 after setting
I is also input to the calculator 9, which calculates the following equation to keep the temperature of the heat medium flowing into the heat exchanger 14E-1 constant =+@N1'i.゛As shown in Fig. 4, at the confluence point 7', a flow rate Qt, a heating medium of temperature TI, specific heat CI, and
A heat medium having a flow rate Qt, a temperature T, and a specific heat σ2 flows in, and flows out as a heat medium having a flow rate Qo%, a temperature To, and a specific heat Co.
ここで熱量保存則よシ
Ｇｏ ＸＱｏＸＴｏ＝ＣＩＸＱＩＸＴｔ＋Ｃ＊ＸＱ２Ｘ
Ｔ＊ ・−−−−・・・・（１）が成シ立つ、一方
Ｑ２ ＝ Ｑｏ Ｑｔ −・−（２）
なので（１） 、 （２）式よシ
となる。従って（３）式のＴｏとして熱交換器ＨＥ−１
人ロ熱媒温度を測定する温度言１１３の出力を、ＴＩお
よびＴｚには熱媒バイパス温度計１２及び熱媒温度計１
６からの測定値を代入し、Ｑｏには熱媒流量計１４から
の測定値を代入すると、Ｔｏを一定（設定値）とするた
めのＱｌがまる。この９１を熱媒バイパス流量調節装置
１０の設定値として流１ｆｔ ？ＪｒＡ節升８節制８す
る。なおＣｎ （ｉ ＝０ ＋ ｌ ｅ ２ ）は熱媒
の比熱曲線により温度で一義となる。Here, according to the law of conservation of heat, Go XQoXTo=CIXQIXTt+C*XQ2X
T* ·------... (1) holds true, while Q2 = Qo Qt - · - (2) Therefore, equations (1) and (2) hold. Therefore, as To in equation (3), heat exchanger HE-1
The output of the temperature gauge 113 that measures the temperature of the heating medium is output from the heating medium bypass thermometer 12 and the heating medium thermometer 1 for TI and Tz.
By substituting the measured value from 6 and the measured value from the heat medium flow meter 14 for Qo, Ql for keeping To constant (set value) is obtained. With this 91 as the setting value of the heat medium bypass flow rate adjustment device 10, the flow rate is 1 ft? JrA Setsu 8 Temperance 8. Note that Cn (i = 0 + l e 2 ) is uniquely determined by the temperature due to the specific heat curve of the heating medium.
（発明の効果）
本発すＪでけ熱媒バイパス温度、予熱器出口熱媒温度に
よシ、熱交換器ＨＥ−１出口の熱媒温度が変化しても、
その時点の温度により一義的にバイパス流量を酸１整す
るため、次のような利点を持つ。(Effect of the invention) Even if the heat medium temperature at the outlet of the heat exchanger HE-1 changes depending on the heat medium bypass temperature and the preheater outlet heat medium temperature,
Since the bypass flow rate is uniquely adjusted depending on the temperature at that time, it has the following advantages.
■従来技術では熱交換器入口熱媒温度が、熱媒の温度変
化にかかわＬフず管理温度９０℃以下とならないようバ
イパス弁にて流量をセットしていたため、熱交喚器入ロ
：４媒濃度は９０℃以下にはならなりものの、１００数
℃から９０℃近くまでを大さく変化し９０℃以上の熱媒
の熱量回収は行なわれていなかったか、本発明では前述
の演算及び制御により、熱交換器入口熱媒温度が常に菅
ｉｌ温度となシ、９０℃以上の熱媒の熱量回収が行なわ
れる。■上記と同様の効果ケ得るため、熱交換器入口熱
媒温度紫一定とするための熱媒バイパス流擬調節、即ち
温度調崩計と流−靴調節計のカスケード側脚法が一般に
知られているが、温度調節計と流量調節計のカスケード
制御法では温度調節計のＰＩＩ）演其後に流量調節計へ
１４節信号が入力されるが、本発明ではその時点によシ
ー義的に流量調節計へ調節信号が入力されるため、従来
一般に知られている制師法に比較して温度調節計のＰ
Ｉ Ｔ、）演算が無い分制呻の応答性が早い。■In the conventional technology, the flow rate was set using a bypass valve so that the temperature of the heat medium at the heat exchanger inlet did not fall below the L fus control temperature of 90°C regardless of the temperature change of the heat exchanger. Although the concentration of the medium was below 90°C, it varied greatly from several hundred degrees Celsius to nearly 90°C, and the heat recovery of the heat medium above 90°C was not performed. As long as the temperature of the heat medium at the inlet of the heat exchanger is always the pipe temperature, the heat amount of the heat medium of 90° C. or higher is recovered. ■In order to obtain the same effect as above, pseudo-control of heat medium bypass flow is generally known to keep the temperature of the heat medium at the inlet of the heat exchanger constant, that is, the cascade side leg method of a temperature control meter and a flow controller is generally known. However, in the cascade control method of the temperature controller and the flow rate controller, the 14-node signal is input to the flow rate controller after the temperature controller's PII), but in the present invention, the flow rate is Since the adjustment signal is input to the controller, the temperature controller's P
IT,) Responsiveness of minute control is fast as there is no calculation.
第１図は従来の熱風炉排熱回収設備における説明用４（
４ｙ念図、第２図は従来の熱）虱炉排熱回収設置曜図向
で３′は燃料ガス供給管、）ＩＥ−３はガス予熱器、４
′は燃料空気供給管、Ｈｇ−２は空気予熱器、ｌ、１′
は熱媒循環又は配管経路、７はバイパス配管、８は流址
調整弁、ｌＯは熱媒バイパス渡板調整装置、９は演！−
Ｉ、器、１１は熱媒バイパス流Ｊ７ｔ ｒｉ’１１１２
は熱媒バイパス温度計、１３．１６は熱媒温度ａ１であ
る。
出願人 新目本製鐵株式会社（はが１名）代理人弁理士
青 柳 稔Figure 1 is an explanatory 4 (
Figure 2 is a conventional heat exhaust heat recovery installation diagram, 3' is the fuel gas supply pipe,) IE-3 is the gas preheater, 4
' is the fuel air supply pipe, Hg-2 is the air preheater, l, 1'
is the heat medium circulation or piping route, 7 is the bypass piping, 8 is the flow adjustment valve, IO is the heat medium bypass span plate adjustment device, and 9 is the performance! −
I, vessel, 11 is heat medium bypass flow J7t ri'1112
is a heating medium bypass thermometer, and 13.16 is a heating medium temperature a1. Applicant: Shinmehon Steel Co., Ltd. (1 person) Representative: Minoru Aoyagi
Claims (1)
気供給管の途中に配置したを気予熱器のそれぞれを熱風
炉排ガス管の途中に配置した熱交換器へ熱媒循環配管で
連結（７、該熱媒循環経路の途中にバイパス配′Ｕを設
けると共にバイパス配管に流量ｆｉｌ＾１整弁を配置し
、熱媒バイパス流星調整製置を介して演算器へ電気的に
結合し、該演算器へバイパス配管に配置した熱媒バイパ
ス流量剖、熱媒バイパス温度百↑を電気的に結合すると
共に、熱媒バイパスとの合流点前後の配管紳路に熱媒温
度計を配置して演算器へ電気的に結合し、熱交換器へ流
入する？！８媒の温度を一定にするように、熱風排ガス
の熱エネルギーを回収すること’ｃ ７ｊＪ能とする熱
風炉排熱回収設備。The gas preheater placed in the middle of the fuel gas supply pipe and the air preheater placed in the middle of the combustion air supply pipe are connected to the heat exchanger placed in the middle of the hot blast furnace exhaust gas pipe using heat medium circulation piping ( 7. A bypass pipe 'U' is provided in the middle of the heat medium circulation path, and a flow rate fil^1 regulating valve is arranged in the bypass pipe, and electrically connected to the computing unit via the heat medium bypass meteor adjustment device. Electrically connect the heating medium bypass flow rate and heating medium bypass temperature 100↑ placed in the bypass piping to the calculation unit, and place a heating medium thermometer in the piping passage before and after the confluence with the heating medium bypass to connect the calculation unit to the calculation unit. A hot blast furnace exhaust heat recovery equipment capable of recovering the thermal energy of the hot blast exhaust gas so as to maintain a constant temperature of the medium flowing into the heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11354283A JPS605815A (en) | 1983-06-23 | 1983-06-23 | Waste heat recovering installation for hot stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11354283A JPS605815A (en) | 1983-06-23 | 1983-06-23 | Waste heat recovering installation for hot stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS605815A true JPS605815A (en) | 1985-01-12 |
Family
ID=14614948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11354283A Pending JPS605815A (en) | 1983-06-23 | 1983-06-23 | Waste heat recovering installation for hot stove |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS605815A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5468172B1 (en) * | 2013-10-16 | 2014-04-09 | 新日鉄住金エンジニアリング株式会社 | Hot stove facility |
| JP2016505717A (en) * | 2012-12-21 | 2016-02-25 | プライメタルズ テクノロジーズ リミテッド | Method and apparatus for supplying blast to a blast furnace |
-
1983
- 1983-06-23 JP JP11354283A patent/JPS605815A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016505717A (en) * | 2012-12-21 | 2016-02-25 | プライメタルズ テクノロジーズ リミテッド | Method and apparatus for supplying blast to a blast furnace |
| US9868998B2 (en) | 2012-12-21 | 2018-01-16 | Primetals Technologies Ltd | Method and apparatus for supplying blast to a blast furnace |
| JP5468172B1 (en) * | 2013-10-16 | 2014-04-09 | 新日鉄住金エンジニアリング株式会社 | Hot stove facility |
| WO2015056630A1 (en) * | 2013-10-16 | 2015-04-23 | 新日鉄住金エンジニアリング株式会社 | Hot blast furnace facility |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2020029501A1 (en) | Anti-condensation wall-mounted gas boiler and anti-condensation method therefor | |
| CN104914036B (en) | A kind of pipeline corrosion resistance characteristic pilot system | |
| JPS605815A (en) | Waste heat recovering installation for hot stove | |
| CA1266653A (en) | Apparatus and method for the flow control of flue gas to combustion air in a regenerative heating system | |
| CN206131023U (en) | Stable control gas boiler coal air preheater low temperature corrosion's device | |
| RU2738154C2 (en) | Method for preliminary heating of fluid medium upstream of furnace | |
| JPS5823527B2 (en) | Kinnetsuronadoniokeru | |
| TW202210769A (en) | Multi-stage heat pump performance test system | |
| JPH07174436A (en) | River water utilizing heat recovery system | |
| JP3162161B2 (en) | Computing unit for boiler equipment | |
| JP3846188B2 (en) | Humidity control method of cold air on the hot air furnace entrance side | |
| JPS5928030Y2 (en) | Exhaust heat recovery device for regenerative hot blast stove | |
| CN207699617U (en) | Blast furnace raw gas temperature elevation system | |
| RU2796734C1 (en) | Heat supply system | |
| CN206582829U (en) | A kind of flue gas processing device | |
| CN206958887U (en) | Fume afterheat utilizes water side system heating agent shredded tobacco for water pipes cooler water side system structure-improved | |
| CN206531048U (en) | Fume afterheat utilizes water side system condensate system structure-improved | |
| JPH04332302A (en) | Control method for heat collecting device | |
| CN206531049U (en) | Fume afterheat bypasses cigarette cooler water supply system structure-improved using water side system | |
| JPS6215626Y2 (en) | ||
| JP2830548B2 (en) | Water heater | |
| SU974044A1 (en) | Apparatus for controlling heat consumption for central heating | |
| JPS6131397B2 (en) | ||
| JPS5956508A (en) | Method for controlling combustion in hot stove for blast furnace | |
| JPS6233217A (en) | Control device for intermittent combustion in instantaneous gas heater |