JPS6118039Y2 - - Google Patents
Info
- Publication number
- JPS6118039Y2 JPS6118039Y2 JP1980077614U JP7761480U JPS6118039Y2 JP S6118039 Y2 JPS6118039 Y2 JP S6118039Y2 JP 1980077614 U JP1980077614 U JP 1980077614U JP 7761480 U JP7761480 U JP 7761480U JP S6118039 Y2 JPS6118039 Y2 JP S6118039Y2
- Authority
- JP
- Japan
- Prior art keywords
- preheater
- gas
- fuel gas
- furnace
- air
- 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
Links
- 239000002737 fuel gas Substances 0.000 claims description 32
- 239000002912 waste gas Substances 0.000 claims description 20
- 238000002791 soaking Methods 0.000 claims description 14
- 238000002485 combustion reaction Methods 0.000 claims description 13
- 239000007789 gas Substances 0.000 description 15
- 229910000831 Steel Inorganic materials 0.000 description 4
- 206010022000 influenza Diseases 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004868 gas analysis Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Air Supply (AREA)
- Feeding And Controlling Fuel (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Description
【考案の詳細な説明】
本考案は均熱炉あるいは加熱炉等の燃料ガスお
よび燃焼用空気を炉自身の廃熱を利用して予熱す
るための燃料ガス・空気予熱装置に関する。[Detailed Description of the Invention] The present invention relates to a fuel gas/air preheating device for preheating fuel gas and combustion air in a soaking furnace or heating furnace using the waste heat of the furnace itself.
例えば鋼塊を分塊圧延に適する温度に均一に加
熱する均熱炉では、炉に供給する燃焼用空気を予
熱して熱効率を高めている。同様な考えで、燃料
ガスも炉に吹込む前に予熱すれば火焔温度が上昇
し、燃料原単位の向上を図ることができる。特に
均熱炉では、炉内全体を一様な高温とするため、
炉から出る廃ガス温度も1200℃程度ときわめて高
温である。したがつて最近の均熱炉では、炉の廃
ガス煙道にレキユペレータと称する熱交換器（予
熱器）を設置し、廃ガスとの熱交換により、燃焼
用空気および燃料ガスを予熱している。しかしこ
れまでの燃料ガスの予熱器は、廃ガス煙道に対し
て燃焼用空気の予熱器から下流側に設置されてい
るために廃ガス温度は低温となり、しかも一般に
輻射型予熱器であるために設備も大がかりで、新
たに建設する場合はともかく、現在稼動中の均熱
炉に適用しようとすると炉を長期間停止して煙道
を大巾に改修する必要があり、設備費用も高額の
ものとなつていた。 For example, in a soaking furnace that uniformly heats a steel ingot to a temperature suitable for blooming, the combustion air supplied to the furnace is preheated to increase thermal efficiency. In a similar way, if fuel gas is preheated before being blown into the furnace, the flame temperature will increase and the fuel consumption rate can be improved. In particular, in soaking furnaces, in order to maintain a uniform high temperature throughout the furnace,
The temperature of the waste gas coming out of the furnace is also extremely high, around 1200℃. Therefore, in recent soaking furnaces, a heat exchanger (preheater) called a requipulerator is installed in the waste gas flue of the furnace, and the combustion air and fuel gas are preheated by heat exchange with the waste gas. . However, conventional fuel gas preheaters are installed downstream of the combustion air preheater in the waste gas flue, resulting in a low temperature of the waste gas, and because they are generally radiant preheaters. The equipment is also large-scale, and if you try to apply it to a soaking furnace that is currently in operation, you will have to shut down the furnace for a long time and extensively renovate the flue, and the equipment cost is also high. It had become a thing.
本考案は、安価に設置できまた既存の均熱炉等
にも容易に取付けることができる安全性の高い燃
料ガスおよび燃焼用空気の予熱装置を提供するこ
とを目的とする。 An object of the present invention is to provide a highly safe preheating device for fuel gas and combustion air that can be installed at low cost and easily installed in existing soaking furnaces.
この目的のために、本考案の燃料ガス・空気予
熱装置は、均熱炉、加熱炉等の廃ガス煙道に直列
にかつ互いに隔置して２個の燃焼用空気予熱器を
設け、前記２個の空気予熱器を結ぶ煙道に燃料ガ
ス予熱器を設けたものである。 For this purpose, the fuel gas/air preheating device of the present invention is provided with two combustion air preheaters in series and spaced apart from each other in the exhaust gas flue of a soaking furnace, heating furnace, etc. A fuel gas preheater is installed in the flue connecting two air preheaters.
好ましくは、前記燃料ガス予熱器は輻射型のも
のではなく、いわゆる対流型チヤンネル予熱器と
し、またこの予熱器の上流側および下流側の適当
な煙道位置に、成分分析用廃ガス取出管を挿入す
るのがよい。 Preferably, the fuel gas preheater is not a radiant type but a so-called convection channel preheater, and exhaust gas extraction pipes for component analysis are provided at appropriate flue positions on the upstream and downstream sides of the preheater. It is better to insert it.
以下、本考案を、図面を参照しながら、均熱炉
に適用した実施例について説明する。 Hereinafter, an example in which the present invention is applied to a soaking furnace will be described with reference to the drawings.
第１図は本考案の実施例に係る燃料ガス・空気
予熱装置を取付けた均熱炉を概略的に示したもの
である。この図において、１は均熱炉であつて、
内部に複数個の鋼塊Ｗが配置される。鋼塊Ｗは、
炉壁に設置したバーナ２の火焔によつて均熱され
る。バーナ２には燃料ガス配管５，５１を通して
高炉ガスと転炉ガス（またはコークス炉ガス）を
混合したいわゆるＭガス（ミツクスガス）等が供
給される。３，３１，３２は廃ガス煙道、４，４
１，４２は燃焼用空気配管である。この廃ガス煙
道中に直列にかつ互いに或る間隔をおいて２個の
燃焼用空気予熱器６ａ，６ｂが設けられる。図示
のように一方の空気予熱器６ａは廃ガス煙道３，
３１間の高温側に配置され、他方の空気予熱器６
ｂは廃ガス煙道３１，３２間の、低温側に配置さ
れる。７は燃料ガス予熱器であつて、本考案では
高温側と低温側の空気予熱器６ａ，６ｂ間、即ち
これらの空気予熱器を結ぶ廃ガス煙道３１に設け
てある。 FIG. 1 schematically shows a soaking furnace equipped with a fuel gas/air preheating device according to an embodiment of the present invention. In this figure, 1 is a soaking furnace,
A plurality of steel ingots W are arranged inside. The steel ingot W is
The heat is uniformly heated by the flame of burner 2 installed on the furnace wall. The burner 2 is supplied with so-called M gas (mixed gas), which is a mixture of blast furnace gas and converter gas (or coke oven gas), through fuel gas pipes 5 and 51. 3, 31, 32 are waste gas flues, 4, 4
1 and 42 are combustion air pipes. Two combustion air preheaters 6a, 6b are provided in series in this waste gas flue and spaced apart from each other. As shown in the figure, one air preheater 6a has a waste gas flue 3,
31, and the other air preheater 6
b is arranged between the waste gas flues 31 and 32 on the low temperature side. A fuel gas preheater 7 is provided in the present invention between the air preheaters 6a and 6b on the high temperature side and the low temperature side, that is, in the waste gas flue 31 connecting these air preheaters.
燃料ガス予熱器７は、上述のように２組の空気
予熱器６ａ，６ｂの間、即ち狭い煙道３１中に設
置されるため、通常の輻射型のものではスペース
上設置不可能であり、対流型チヤンネル予熱器
（多管式熱交換器）が用いられる。この対流型チ
ヤンネル予熱器の１例を第２図に示す。一定間隔
に隔置された一対の集管部７２，７２′の間に複
数個の熱交換のためのガス流通管７１が互いに離
隔して配置され、前記各集管部を介して入側燃料
ガス配管５および出側燃料ガス配管５１に連通し
ている。このようなチヤンネル予熱器７を、その
両端部、即ち集管部７２，７２′の外端面が廃ガ
ス煙道３１の両側壁に接するように埋込む。この
場合、ガス流通管７１を通る燃料ガスの流れ方向
に対して、廃ガスは該流通管７１に接しながらこ
れに垂直方向（紙面に対して垂直方向）に流れ
る。このように多管式とすることにより、きわめ
てコンパクトに構成でき、煙道を大きく改造する
ことなく既存の煙道に簡単に組込むことが可能と
なる。 As described above, the fuel gas preheater 7 is installed between the two sets of air preheaters 6a and 6b, that is, in the narrow flue 31, so it is impossible to install it with a normal radiant type due to space constraints. A convection channel preheater (shell-and-tube heat exchanger) is used. An example of this convection type channel preheater is shown in FIG. A plurality of gas flow pipes 71 for heat exchange are arranged spaced apart from each other between a pair of collecting pipe parts 72 and 72' spaced apart from each other at regular intervals, and the inlet fuel is passed through each collecting pipe part. It communicates with the gas pipe 5 and the outlet fuel gas pipe 51. Such a channel preheater 7 is embedded so that its both ends, that is, the outer end surfaces of the collecting pipe portions 72 and 72' are in contact with both side walls of the waste gas flue 31. In this case, with respect to the flow direction of the fuel gas passing through the gas flow pipe 71, the waste gas flows in a direction perpendicular to the flow pipe 71 (perpendicular to the plane of the paper) while contacting the flow pipe 71. By adopting the multi-tube structure as described above, the structure can be extremely compact, and it is possible to easily incorporate it into an existing flue without majorly modifying the flue.
次に上述の実施例による均熱炉の作動系統を説
明する。まず、常温の燃焼用空気は配管４→低温
側空気予熱器６ｂ→配管４１→高温側空気予熱器
６ａ→配管４２を経て約550℃となりバーナ２に
投入される。一方、常温のＭガスは配管５→燃料
ガス予熱器７→配管５１を経て約350℃となりバ
ーナ２に至る。バーナ２で燃焼され鋼塊Ｗを均一
に加熱した約1200℃の廃ガスは、煙道３，３１，
３２を経て集合煙道１０に導かれる。この間、廃
ガスは空気予熱器６ａ，６ｂおよび燃料ガス予熱
器７によつて燃焼用空気およびＭガスと熱交換さ
れ約600℃に温度降下する。 Next, the operating system of the soaking furnace according to the above embodiment will be explained. First, the combustion air at room temperature passes through the pipe 4 → the low-temperature side air preheater 6b → the pipe 41 → the high-temperature side air preheater 6a → the pipe 42, and reaches about 550° C. and is introduced into the burner 2. On the other hand, M gas at room temperature passes through the pipe 5 → the fuel gas preheater 7 → the pipe 51 and reaches about 350° C. until it reaches the burner 2. The approximately 1200°C waste gas that was combusted by the burner 2 and uniformly heated the steel ingot W is sent to the flue 3, 31,
32 to the collective flue 10. During this time, the waste gas exchanges heat with the combustion air and M gas by the air preheaters 6a, 6b and the fuel gas preheater 7, and its temperature drops to about 600°C.
本考案において、燃料ガス予熱器を２組の空気
予熱器の間に設けたので、高温側空気予熱器から
上流側の廃ガス流路では廃ガスが高温すぎるた
め、万一燃料ガスが洩れて爆発事故などを起すこ
とがないように、燃料ガス予熱器自体の構造、材
質等について格段の考慮が必要でコスト高とな
り、また低温側空気予熱器から下流側では廃ガス
温度が低下し、必然的に大型の燃料ガス予熱器を
用いなければならず設備上不利がまぬがれないか
らである。本考案のように両空気予熱器の中間位
置に設置することにより、設備費用並びに安全性
における上述の問題を解決できる。 In this invention, the fuel gas preheater is installed between the two sets of air preheaters, so in the event that the waste gas is too high temperature in the waste gas flow path upstream from the high temperature side air preheater, the fuel gas may leak. In order to prevent explosion accidents, special consideration must be given to the structure, materials, etc. of the fuel gas preheater itself, which increases costs.In addition, the temperature of the waste gas decreases downstream from the low-temperature side air preheater, resulting in This is because a large-sized fuel gas preheater must be used, which is inevitably disadvantageous in terms of equipment. By installing the air preheater at an intermediate position between the two air preheaters as in the present invention, the above-mentioned problems regarding equipment cost and safety can be solved.
なお、万一燃料ガスが洩れたときの安全性確保
のために、煙道３および３２中にガス分析用廃ガ
ス取出し管８ａ，８ｂを挿入し、これによつて定
期的に煙道廃ガス中のCO2，CO，O2の濃度を測
定して、燃料ガスの洩れ有無を検査し、異常があ
れば直ちに炉の操業を停止し燃料ガス予熱器の点
検を行なう。図示実施例ではガス分析用のガス取
出管は煙道３，３１に設置したが、燃料ガス予熱
器の前後であればどこでもよい。 In addition, in order to ensure safety in the event that fuel gas leaks, exhaust gas extraction pipes 8a and 8b for gas analysis are inserted into the flues 3 and 32, and these pipes are used to periodically remove flue gas. The concentrations of CO 2 , CO , and O 2 in the reactor are measured to check for fuel gas leaks. If any abnormality is found, the furnace operation is immediately stopped and the fuel gas preheater is inspected. In the illustrated embodiment, the gas extraction pipes for gas analysis are installed in the flues 3 and 31, but they may be installed anywhere before or after the fuel gas preheater.
従来の如く輻射型の燃料ガス予熱器を空気予熱
器から下流側の廃ガス流路に設置した場合、少な
くとも空気予熱器と同等程度のものが必要とな
り、煙道の改修費用も高額となつていたが、本考
案によれば、燃料ガス予熱器を多管式として２個
の空気予熱器間に設置したため、ガス予熱器未設
置の既存炉に適用する場合の煙道改修費用が安価
であり、予熱器の材質も格別に考慮する必要がな
いなど種々の利点がある。 If a radiant fuel gas preheater is installed in the waste gas flow path downstream from the air preheater as in the past, a device at least equivalent to the air preheater will be required, and the cost of renovating the flue will be high. However, according to the present invention, the fuel gas preheater is a multi-tubular type and is installed between two air preheaters, so the flue renovation cost is low when applied to an existing furnace without a gas preheater installed. There are various advantages such as no need to take special consideration of the material of the preheater.
第１図は本考案の実施例に係る燃料ガス・空気
予熱装置を取付けた均熱炉の全体概略図、第２図
は本考案に適用される対流型チヤンネル予熱器の
１例を示した側面図である。
１……均熱炉、２……バーナ、３，３１，３２
……廃ガス煙道、４，４１，４２……燃焼用空気
配管、５，５１……燃料ガス配管、６ａ，６ｂ…
…燃焼用空気予熱器、７……燃料ガス予熱器。
Fig. 1 is an overall schematic diagram of a soaking furnace equipped with a fuel gas/air preheating device according to an embodiment of the present invention, and Fig. 2 is a side view showing an example of a convection type channel preheater applied to the present invention. It is a diagram. 1... Soaking furnace, 2... Burner, 3, 31, 32
...Waste gas flue, 4,41,42...Combustion air pipe, 5,51...Fuel gas pipe, 6a, 6b...
... Combustion air preheater, 7... Fuel gas preheater.
Claims (1)
個の燃焼用空気予熱器を設け、前記空気予熱器の
間に燃料ガス予熱器を設けたことを特徴とする均
熱炉等における燃料ガス・空気の予熱装置。 2 in series and spaced apart from each other in the waste gas flue of the furnace.
1. A preheating device for fuel gas and air in a soaking furnace or the like, characterized in that two combustion air preheaters are provided, and a fuel gas preheater is provided between the air preheaters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980077614U JPS6118039Y2 (en) | 1980-06-04 | 1980-06-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980077614U JPS6118039Y2 (en) | 1980-06-04 | 1980-06-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS571864U JPS571864U (en) | 1982-01-07 |
| JPS6118039Y2 true JPS6118039Y2 (en) | 1986-06-02 |
Family
ID=29440174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980077614U Expired JPS6118039Y2 (en) | 1980-06-04 | 1980-06-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6118039Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012163306A (en) * | 2011-02-09 | 2012-08-30 | Chugai Ro Co Ltd | Burner device and industrial furnace with the same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2878318B1 (en) * | 2004-11-22 | 2007-03-30 | Air Liquide | INDIRECT HEAT EXCHANGER |
| KR101289139B1 (en) * | 2011-08-24 | 2013-07-23 | 주식회사기성이엔지 | Fuel pre-heating apparatus |
-
1980
- 1980-06-04 JP JP1980077614U patent/JPS6118039Y2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012163306A (en) * | 2011-02-09 | 2012-08-30 | Chugai Ro Co Ltd | Burner device and industrial furnace with the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS571864U (en) | 1982-01-07 |
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