WO2010026979A1 - 連続加熱炉 - Google Patents
連続加熱炉 Download PDFInfo
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- WO2010026979A1 WO2010026979A1 PCT/JP2009/065298 JP2009065298W WO2010026979A1 WO 2010026979 A1 WO2010026979 A1 WO 2010026979A1 JP 2009065298 W JP2009065298 W JP 2009065298W WO 2010026979 A1 WO2010026979 A1 WO 2010026979A1
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- WIPO (PCT)
- Prior art keywords
- supply port
- air supply
- fuel supply
- fuel
- air
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/36—Arrangements of heating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/02—Disposition of air supply not passing through burner
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
- F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/02—Supplying steam, vapour, gases, or liquids
Definitions
- the present invention relates to a continuous heating furnace using a combustion-type regenerative alternating burner that directly injects fuel into the furnace and slowly burns it.
- Such a continuous heating furnace is provided with a preheating zone, a heating zone, and a soaking zone arranged side by side from the steel material charging side, and the furnace atmosphere heated in the heating zone is transferred to the preheating zone, that is, the charging side.
- the heat generated by flowing is configured to be used efficiently.
- a flue is provided in the vicinity of the charging side so that the atmosphere in the furnace heated in the heating zone flows to the charging side.
- the present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a continuous heating furnace capable of efficiently burning fuel while suppressing generation of NOx.
- the continuous heating furnace according to the present invention is provided on the most upstream side in the conveying direction, the furnace body provided with a plurality of heat treatment zones arranged in the conveying direction in which the steel material is conveyed from the charging side toward the extraction side,
- a continuous heating furnace comprising a flue through which an atmosphere in a furnace flowing in a direction opposite to a conveying direction in the furnace body flows, and a plurality of burners arranged along a conveying direction on a side wall of the furnace body,
- the burner is an air supply path that terminates in an air supply port for supplying air to the furnace body, and a fuel that is disposed around the air supply port at a distance from the air supply port and supplies fuel to the furnace body
- a fuel supply path that terminates in a supply port, and the burner located on the most upstream side in the transport direction of the burner has the fuel supply port disposed upstream of the air supply port in the transport direction.
- the fuel supply at the end Road characterized in that it toward the end of the fuel supply passage is
- a plurality of the burners arranged in the conveying direction from the most upstream side in the heat treatment zone located on the most upstream side in the conveying direction are the air supply
- the fuel supply path that terminates at the fuel supply port disposed on the upstream side in the transport direction from the port is inclined toward the air supply port toward the end of the fuel supply path.
- all the burners in the heat treatment zone located on the most upstream side in the conveying direction are arranged on the upstream side in the conveying direction from the air supply port.
- the fuel supply path having the fuel supply port as an end is inclined toward the air supply port toward the end of the fuel supply path.
- the fuel supplied from the inclined fuel supply port is supplied so as to merge with the flow of the supplied air at a peripheral portion of the air supplied from the air supply port. .
- the continuous heating furnace according to the present invention is provided on the uppermost stream side in the transport direction, and a furnace body in which a plurality of heat treatment zones are arranged in the transport direction in which the steel material is transported from the charging side toward the extraction side.
- a continuous heating furnace provided with a flue through which the atmosphere in the furnace flowing in the direction opposite to the conveying direction flows in the furnace body, and a plurality of burners arranged along the conveying direction on the side wall of the furnace body The burner is disposed in an air supply path that terminates in an air supply port for supplying air into the furnace body, and is disposed around the air supply port at a distance from the air supply port.
- the air supply port At the peripheral portion of the supplied air, so as to join the flow of the supplied air, characterized in that it toward the end of the fuel supply passage is inclined to the air supply port side.
- fuel can be burned safely and efficiently while suppressing the generation of NOx.
- FIG. 1 is a longitudinal sectional view showing a preferred embodiment of a continuous heating furnace according to the present invention.
- FIG. 2 is a plan sectional view of FIG.
- the continuous heating furnace 1 is one end in the longitudinal direction of a substantially rectangular parallelepiped furnace body 10 and the other side from the charging side 10a into which the steel material F is charged.
- a preheating zone X, a heating zone Y, and a soaking zone Z as heat treatment zones are provided side by side toward the extraction side 10b from which the steel material F is extracted.
- a partition wall 18 that partitions between adjacent zones is provided at the boundary between the heat treatment zones so that the steel material F can pass therethrough.
- the direction from the charging side 10a toward the extraction side 10b is a steel material.
- F is the conveyance direction.
- a flue 20 into which the atmosphere in the furnace flowing in the direction opposite to the conveying direction of the steel material F flows is provided on the most upstream side in the conveying direction.
- a chimney (not shown) is provided at the tip of the flue 20 and communicates with the outside of the furnace body 10.
- a plurality of burners 30 are provided on the side walls 12 facing each other in the width direction of the preheating zone X, the heating zone Y, and the soaking zone Z, respectively.
- six burners 30 are provided on each side wall 12 of each zone X, Y, and Z, three each at an approximately equal interval above and below the position where the steel material F is conveyed.
- the upper three burners 30 and the lower three burners 30 are arranged substantially horizontally along the conveyance direction.
- These burners 30 are regenerative burners in which pairs of opposed burners 30 alternately repeat combustion and heat storage.
- Each burner 30 has an air supply path 32 that terminates in an air supply port 31 that supplies air into the furnace body 10, and two fuel supplies that are arranged around the air supply port 31 and supply fuel into the furnace body 10. It is composed of two fuel supply paths 34 ending at the port 33.
- the air supply port 31 and the two fuel supply ports 33 included in each burner 30 are disposed so as to be substantially horizontal along the conveyance direction of the steel material F, and the two fuel supply ports 33 are arranged in the conveyance direction of the steel material F.
- the air supply port 31 is disposed on the upstream side and the downstream side of the air supply port 31 with a space therebetween.
- the air supply path 32 is formed in the side wall 12 substantially horizontally from the air supply port 31, and the fuel supply path 34 is formed substantially horizontally from the fuel supply port 33.
- the fuel supply port 33 and the fuel supply path 34 positioned on the upstream side of the air supply port 31 in the conveying direction of the steel material F are positioned on the downstream side of the upstream fuel supply port 33a and the upstream fuel supply path 34a.
- the fuel supply port 33 and the fuel supply path 34 are referred to as a downstream fuel supply port 33b and a downstream fuel supply path 34b.
- FIG. 3 is a plan sectional view for explaining the burner 30 located on the most upstream side in the transport direction.
- the air supply path 32, the upstream fuel supply path 34 a, and the downstream fuel supply path 34 b are arranged on the wall surface 12 a of the side wall 12 except for the two upper and lower upstream fuel supply paths 34 a that are located on the most upstream side and face each other. On the other hand, it is provided in a substantially vertical direction.
- the two pairs of upper and lower upstream fuel supply passages 34a positioned on the most upstream side face each other toward the upstream fuel supply port 33a that is the end, that is, toward the inside of the furnace body 10. Inclined in a direction approaching the side. At this time, the inclination angle of the upstream side fuel supply passage 34a is such that the supplied fuel flows in the vicinity of the air supplied from the air supply port 31 by being mixed with the supplied air and flowing. Is set.
- the steel material F charged from the charging side 10a of the furnace body 10 is sequentially transferred to the preheating zone X, the heating zone Y, and the soaking zone Z provided in the furnace body 10. While being heated, it is heat-treated by the burner 30 provided in each zone and conveyed to the extraction side 10b.
- the combustion exhaust gas generated in the heating zone Y and the soaking zone Z flows toward the flue 20.
- the fuel supplied from the fuel supply port 33 located on the upstream side in the transport direction from the air supply port 31, that is, on the downstream side of the airflow toward the flue 20, is supplied by the combustion exhaust gas.
- the air flows away from the air supplied from the port 31 and flows out toward the flue 20 together with the combustion exhaust gas without being mixed with air.
- the upstream fuel supply passages 34 a of the two upper and lower pairs of burners 30 positioned on the uppermost stream side in the conveying direction are directed toward the inside of the furnace body 10.
- the most upstream fuel is provided. This will be described as the supply path 36.
- the inclination of the most upstream fuel supply path 36 is such that the supplied fuel flows in a mixed manner along the air when it joins around the air supplied from the air supply port 31. It is desirable that the slope is set.
- the supplied fuel is set to have an inclination such that the supplied fuel is mixed and flows along the air around the air supplied from the air supply port 31.
- FIG. 4 is a plan sectional view for explaining the continuous heating furnace of the first modification.
- FIG. 5 is a plan sectional view for explaining a continuous heating furnace of a second modification.
- the upstream fuel supply passages 34a (36) of the two upper and lower pairs of burners 30 positioned on the most upstream side in the transport direction are connected to the inside of the furnace body 10, that is, the upstream fuel supply serving as the end.
- a zone on the most upstream side in the transport direction here, a preheating zone
- the upstream fuel supply passages 34a (36) of a plurality of pairs of burners 30 that are positioned on the most upstream side of all the burners 30 provided in the line and arranged in the transport direction are directed inward of the furnace body 10.
- the right side wall 12 and the left side wall 12 burner 30 facing each other in the furnace width direction are paired to perform combustion and exhaust, but the temperature is equal to the left and right.
- the second and subsequent burners 30 from the most upstream can be the most upstream burner 30, so the above “multiple pairs of burners 30” Two or more burners 30 from the upstream burner 30 to the burner 30 that can be the uppermost stream in the combustion state are good.
- each burner 30 has an air supply port 31 and two fuel supply ports 33, which are positioned substantially horizontally along the conveying direction of the steel material F, and two fuels
- the supply port 33a, 33b demonstrated the example arrange
- the fuel supply port 33 that is inclined in the direction toward the air supply port 31 toward the inside of the furnace body 10 has only one fuel supply port 33 positioned upstream of the air supply port 31 in the transport direction.
- the fuel supply port 33 on the upstream side of the air supply port 31 is, for example, the direction of the edge portion 33 c on the downstream side in the transport direction of the fuel supply port 33 from the edge portion 31 a on the downstream side in the transport direction of the air supply port 31. Refers to the fuel supply port 33 located on the upstream side (see FIG. 7).
- a fuel supply port 33 a part of which is disposed upstream of the downstream edge 31a of the air supply port 31, is experimentally and through experience, and is supplied with air supplied from the air supply port 31 by combustion exhaust gas.
- the fuel supply passage 34 ending with the fuel supply port 33 that is not mixed and may not burn may be entirely inclined toward the air supply port 31.
- FIG. 2 is a plan sectional view of FIG. 1. It is a plane sectional view for explaining the burner located in the uppermost stream side in the conveyance direction. It is a plane sectional view for explaining the continuous heating furnace of the 1st modification. It is a plane sectional view for explaining the continuous heating furnace of the 2nd modification. It is explanatory drawing explaining the combustion aspect of a thermal storage alternating burner. It is the schematic which shows the positional relationship of the air supply port of a burner applied to the continuous heating furnace concerning this invention, and a fuel supply port.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Tunnel Furnaces (AREA)
- Furnace Details (AREA)
- Combustion Of Fluid Fuel (AREA)
- Air Supply (AREA)
Abstract
Description
10 炉体
10a 装入側
10b 抽出側
12 側壁
12a 壁面
18 仕切り壁
20 煙道
30 バーナー
31 空気供給口
31a 空気供給口の搬送方向下流側縁部
32 空気供給路
33 燃料供給口
33a 上流側燃料供給口
33b 下流側燃料供給口
33c 上流側燃料供給口の搬送方向下流側縁部
34 燃料供給路
34a 上流側燃料供給路
34b 下流側燃料供給路
36 最上流燃料供給路
F 鋼材
X 予熱ゾーン
Y 加熱ゾーン
Z 均熱ゾーン
Claims (5)
- 装入側から抽出側に向かって鋼材が搬送される搬送方向に複数の熱処理ゾーンが並べて設けられた炉体と、
搬送方向における最上流側に設けられ、前記炉体内を搬送方向と反対方向に流れる炉内雰囲気が流れ込む煙道と、
前記炉体の側壁に、搬送方向に沿って複数配設されたバーナーと、
を備えた連続加熱炉であって、
前記バーナーは、前記炉体内に空気を供給する空気供給口を終端とする空気供給路と、前記空気供給口の周囲に当該空気供給口と間隔を隔てて配置され前記炉体内に燃料を供給する燃料供給口を終端とする燃料供給路と、を備え、
前記バーナーのうち、搬送方向の最上流側に位置する前記バーナーは、前記空気供給口より搬送方向上流側に配置された前記燃料供給口を終端とする前記燃料供給路が、当該燃料供給路の前記終端に向かって前記空気供給口側に傾斜していることを特徴とする連続加熱炉。 - 前記バーナーのうち、搬送方向の最上流側に位置する前記バーナーを含めて、搬送方向の最上流側に位置する前記熱処理ゾーンで最上流側から搬送方向に並ぶ複数の前記バーナーは、前記空気供給口より搬送方向上流側に配置された前記燃料供給口を終端とする前記燃料供給路が、当該燃料供給路の前記終端に向かって前記空気供給口側に傾斜していることを特徴とする請求項1に記載の連続加熱炉。
- 前記バーナーのうち、搬送方向の最上流側に位置する前記バーナーを含めて、搬送方向の最上流側に位置する前記熱処理ゾーンのすべての前記バーナーは、前記空気供給口より搬送方向上流側に配置された前記燃料供給口を終端とする前記燃料供給路が、当該燃料供給路の前記終端に向かって前記空気供給口側に傾斜していることを特徴とする請求項1に記載の連続加熱炉。
- 傾斜している前記燃料供給口から供給された燃料は、前記空気供給口から供給された空気の周辺部にて、当該供給された空気の流れに合流するように供給されることを特徴とする請求項1~3いずれかの項に記載の連続加熱炉。
- 装入側から抽出側に向かって鋼材が搬送される搬送方向に複数の熱処理ゾーンが並べて設けられた炉体と、
前記搬送方向における最上流側に設けられ、前記炉体内を前記搬送方向と反対方向に流れる炉内雰囲気が流れ込む煙道と、
前記炉体の側壁に、搬送方向に沿って複数配設されたバーナーと、
を備えた連続加熱炉であって、
前記バーナーは、前記炉体内に空気を供給する空気供給口を終端とする空気供給路と、前記空気供給口の周囲に当該空気供給口と間隔を隔てて配置され前記炉体内に燃料を供給する燃料供給口を終端とする燃料供給路と、を備え、
前記バーナーにおいて前記空気供給口より搬送方向上流側に配置された前記燃料供給口を終端とする前記燃料供給路は、燃料が前記空気供給口から供給された空気の周辺部にて、当該供給された空気の流れに合流するように、当該燃料供給路の前記終端に向かって前記空気供給口側に傾斜していることを特徴とする連続加熱炉。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2009801342111A CN102138050A (zh) | 2008-09-04 | 2009-09-02 | 连续加热炉 |
KR1020117005084A KR101197880B1 (ko) | 2008-09-04 | 2009-09-02 | 연속가열로 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008227661A JP4860676B2 (ja) | 2008-09-04 | 2008-09-04 | 連続加熱炉 |
JP2008-227661 | 2008-09-04 |
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WO2010026979A1 true WO2010026979A1 (ja) | 2010-03-11 |
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PCT/JP2009/065298 WO2010026979A1 (ja) | 2008-09-04 | 2009-09-02 | 連続加熱炉 |
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JP (1) | JP4860676B2 (ja) |
KR (1) | KR101197880B1 (ja) |
CN (1) | CN102138050A (ja) |
TW (1) | TWI378213B (ja) |
WO (1) | WO2010026979A1 (ja) |
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JP6159638B2 (ja) * | 2013-03-14 | 2017-07-05 | 新日鐵住金株式会社 | 加熱炉 |
CN105659019B (zh) * | 2013-12-27 | 2017-07-07 | 三菱日立电力系统株式会社 | 低噪声减压装置以及燃烧装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5168033U (ja) * | 1974-11-26 | 1976-05-29 | ||
JPS61137650U (ja) * | 1985-02-13 | 1986-08-27 | ||
JPH07103428A (ja) * | 1993-10-06 | 1995-04-18 | Nippon Steel Corp | 酸素バーナ |
JPH08291328A (ja) * | 1995-04-21 | 1996-11-05 | Nippon Steel Corp | 連続加熱装置 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5168033A (en) * | 1974-12-09 | 1976-06-12 | Mitsubishi Heavy Ind Ltd | Gendokino kakaitenboshisochi |
JPS61137650A (ja) * | 1984-12-11 | 1986-06-25 | Mitsubishi Heavy Ind Ltd | モ−ルドを再生製作する方法 |
US5542839A (en) * | 1994-01-31 | 1996-08-06 | Gas Research Institute | Temperature controlled low emissions burner |
JP3282944B2 (ja) * | 1994-07-18 | 2002-05-20 | トヨタ自動車株式会社 | 低NOxバーナ |
JPH08291327A (ja) * | 1995-04-19 | 1996-11-05 | Nippon Steel Corp | 連続加熱装置 |
JP3460441B2 (ja) * | 1996-04-09 | 2003-10-27 | トヨタ自動車株式会社 | 燃焼装置および該燃焼装置を具備した熱設備 |
JP4237842B2 (ja) * | 1998-03-05 | 2009-03-11 | 新日本製鐵株式会社 | 鋼片の連続加熱装置 |
CN2733181Y (zh) * | 2004-07-20 | 2005-10-12 | 德英 | 蓄热式烧嘴 |
CN2828573Y (zh) * | 2005-05-10 | 2006-10-18 | 李淑琴 | 自蓄热调温烧嘴 |
-
2008
- 2008-09-04 JP JP2008227661A patent/JP4860676B2/ja active Active
-
2009
- 2009-09-02 WO PCT/JP2009/065298 patent/WO2010026979A1/ja active Application Filing
- 2009-09-02 KR KR1020117005084A patent/KR101197880B1/ko active IP Right Grant
- 2009-09-02 CN CN2009801342111A patent/CN102138050A/zh active Pending
- 2009-09-03 TW TW098129658A patent/TWI378213B/zh active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5168033U (ja) * | 1974-11-26 | 1976-05-29 | ||
JPS61137650U (ja) * | 1985-02-13 | 1986-08-27 | ||
JPH07103428A (ja) * | 1993-10-06 | 1995-04-18 | Nippon Steel Corp | 酸素バーナ |
JPH08291328A (ja) * | 1995-04-21 | 1996-11-05 | Nippon Steel Corp | 連続加熱装置 |
Also Published As
Publication number | Publication date |
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TWI378213B (en) | 2012-12-01 |
KR20110050661A (ko) | 2011-05-16 |
CN102138050A (zh) | 2011-07-27 |
TW201015028A (en) | 2010-04-16 |
KR101197880B1 (ko) | 2012-11-05 |
JP2010060226A (ja) | 2010-03-18 |
JP4860676B2 (ja) | 2012-01-25 |
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