WO2012120691A1 - 高炉の熱風炉の熱風支管構築方法及び熱風支管 - Google Patents

高炉の熱風炉の熱風支管構築方法及び熱風支管 Download PDF

Info

Publication number
WO2012120691A1
WO2012120691A1 PCT/JP2011/056121 JP2011056121W WO2012120691A1 WO 2012120691 A1 WO2012120691 A1 WO 2012120691A1 JP 2011056121 W JP2011056121 W JP 2011056121W WO 2012120691 A1 WO2012120691 A1 WO 2012120691A1
Authority
WO
WIPO (PCT)
Prior art keywords
hot air
air branch
branch pipe
hot
blast furnace
Prior art date
Application number
PCT/JP2011/056121
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
亮 濱田
昌男 藤田
泰光 古川
Original Assignee
Ｊｆｅスチール株式会社
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 Ｊｆｅスチール株式会社 filed Critical Ｊｆｅスチール株式会社
Priority to PCT/JP2011/056121 priority Critical patent/WO2012120691A1/ja
Priority to CN201180068978.6A priority patent/CN103415629B/zh
Priority to KR1020137022346A priority patent/KR101445516B1/ko
Publication of WO2012120691A1 publication Critical patent/WO2012120691A1/ja

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B9/00—Stoves for heating the blast in blast furnaces
    • C21B9/10—Other details, e.g. blast mains
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/32—Technologies related to metal processing using renewable energy sources

Definitions

  • the present invention relates to a hot air branch pipe in a hot blast furnace of a blast furnace, and is particularly suitable for a hot air branch pipe part connecting a hot blast furnace main body and a hot air main pipe connected to an annular pipe of the blast furnace.
  • Hot blast furnaces which are ancillary equipment for blast furnaces, are used to heat and raise the air blown from the tuyere, and are roughly divided into small internal combustion hot blast furnaces and large external combustion hot blast furnaces.
  • the heat storage chamber and the combustion chamber are separated, and the upper dome is connected to each other.
  • this connection structure is provided with an expansion joint having a bellows structure called a bellows so as to absorb the difference in thermal displacement generated in the heat storage chamber and the combustion chamber or the thermal displacement itself generated in the connection structure itself.
  • a tension beam for taking a so-called reaction force is generally used for the use part of the expansion joint.
  • connection structure of an external combustion type hot stove that can connect a heat storage chamber and a combustion chamber without using an expansion joint, as described in Patent Document 1 below.
  • the ratio RD / TD between the pipe diameter RD of the connecting pipe and the dome diameter TD of the heat storage chamber is 0.24 or more and 0.60 or less.
  • the ratio RD / TD of the pipe diameter RD of the connecting pipe and the dome diameter ND of the combustion chamber is 0.44 or more and 0.60 or less, the drift of the gas in the furnace is prevented and the local knuckle portion of the connecting pipe is locally Therefore, it was possible to connect the heat storage chamber and the combustion chamber without expansion joints.
  • a hot air branch pipe In a hot air furnace, there is also a connecting portion between a combustion chamber (including a heat storage chamber integrated) and a hot air main pipe, a so-called hot air branch pipe, and this hot air branch pipe also absorbs the difference in thermal displacement and the thermal displacement itself. Since the expansion joint is used and the tension beam used to take the so-called reaction force is used at the location where the expansion joint is used, the structure becomes complicated, the iron skin becomes red hot, There is a problem that the expansion joint itself is damaged.
  • the present invention has been made paying attention to the above problems, and provides a hot air branch pipe construction method for a hot blast furnace of a blast furnace that can eliminate the need for an expansion joint and avoid various problems related to the expansion joint. It is intended to do.
  • a hot air branch construction method for a hot blast furnace of the blast furnace includes a hot air branch pipe vertical portion interposed between a hot air main pipe connected to an annular pipe of the blast furnace and the hot blast furnace body.
  • the vertical section of the hot blast branch with respect to the thermal expansion difference ⁇ at the time of heating and drying of the hot blast furnace between the hot blast furnace main body and the vertical section of the hot blast
  • the hot air branch pipe vertical part is supported by a height-adjustable support, and after the initial installation of the hot air branch pipe vertical part, the hot air branch pipe vertical part is lowered to connect the hot air branch pipe vertical part and the hot air furnace main body. After connecting the vertical part of the hot air branch pipe and the main body of the hot air furnace with the horizontal part of the upper part of the hot air branch pipe with the same height, the hot air furnace body and the vertical part of the hot air branch pipe during the temperature rise of the hot air furnace are heated according to the thermal expansion. The height of the vertical portion of the hot air branch pipe is adjusted.
  • the height of the vertical portion of the hot air branch pipe is adjusted, and the actual thermal expansion difference ⁇ between the thermal expansion difference ⁇ and the thermal expansion difference absorption margin ⁇ is changed to the hot air branch upper horizontal portion and the hot air. It is characterized in that it is divided equally or almost equally with the horizontal part of the lower part of the branch pipe.
  • the hot air branch pipe vertical part and the hot air furnace main body are connected by the hot air branch pipe upper horizontal part, the hot air branch pipe vertical part is raised and the hot air branch pipe lower horizontal part is leveled in the hot air branch lower part horizontal part. Brick is stacked, and then the hot air branch pipe upper horizontal portion is lowered and the hot air branch pipe upper horizontal portion is leveled, and bricks are stacked in the hot air branch upper horizontal portion.
  • a hot air branch pipe of a hot blast furnace of the blast furnace includes a hot air branch vertical section and a hot air branch pipe interposed between a hot air main pipe connected to an annular pipe of the blast furnace and the hot blast furnace main body.
  • the hot air branch pipe having a horizontal portion the length of the vertical portion and the horizontal portion of the hot air branch pipe is set to be three times or more of the respective pipe diameters.
  • the length of a vertical part and a horizontal part is the length between centerlines of each pipe
  • the hot air in the vertical part of the hot air branch is against the thermal expansion difference ⁇ at the time of drying in the hot air furnace between the hot blast furnace body and the vertical part of the hot air branch.
  • the vertical part of the hot air branch pipe is supported by a height-adjustable support, and after the initial installation of the vertical part of the hot air branch pipe, the vertical part of the hot air branch pipe is lowered so that the connecting portion between the vertical part of the hot air branch pipe and the main body of the hot air furnace is the same.
  • the vertical part of the hot air branch pipe After connecting the vertical part of the hot air branch pipe and the main body of the hot air branch at the upper horizontal part of the hot air branch pipe at a height, the vertical part of the hot air branch pipe according to the thermal expansion of the hot air furnace body and the vertical part of the hot air branch pipe during the temperature rise of the hot air furnace
  • the difference in thermal expansion that occurs during the hot air oven drying temperature rise can be shared, for example, by the upper horizontal part and the lower horizontal part of the hot air branch pipe, thereby enabling the difference in thermal displacement and the thermal displacement. It can absorb itself.
  • the height of the vertical section of the hot air branch pipe is adjusted to obtain the actual thermal expansion difference ⁇ - ⁇ between the thermal expansion difference ⁇ and the thermal expansion difference absorption margin ⁇ .
  • the vertical section of the hot air branch pipe is raised and the horizontal portion of the lower portion of the hot air branch pipe is leveled, and the brick is placed in the lower horizontal section of the hot air branch
  • Stacking bricks in the upper horizontal part of the hot air branch pipe and the horizontal part of the lower part of the hot air branch pipe is easy by lowering the vertical part of the hot air branch pipe and then placing the brick in the upper horizontal part of the hot air branch pipe in the state where the upper horizontal part of the hot air branch pipe is leveled.
  • the length of the vertical part and the horizontal part of the hot air branch pipe is set to be three times or more of the respective pipe diameters, Even if thermal displacement itself occurs, it can be absorbed by elastic deformation of the tube itself. As a result, it is not necessary to use an expansion joint, and various problems associated with the expansion joint can be avoided.
  • FIGS. 1 to 6 are all process diagrams of the hot air branch construction method for a hot stove according to the present embodiment.
  • the hot stove of this embodiment is a top-fired hot stove in which a so-called combustion chamber and a heat storage chamber are integrated.
  • Reference numeral 1 in the figure denotes a hot stove body.
  • symbol 2 in a figure is a hot-air main pipe connected to the annular pipe of a blast furnace.
  • the hot air branch pipe 3 refers to a connecting pipe structure from the hot air furnace main body 1 to the hot air main pipe 2.
  • the outer shell of the hot-blast furnace main body 1, the hot-air branch pipe 3, and the hot-air main pipe 2 is covered with a so-called iron skin, it is necessary to load a brick for protecting the iron skin inside. Brick needs to be stacked in a special way that can absorb thermal expansion and contraction.
  • the hot air branch pipe construction method of the present invention can also be applied to a conventional external combustion type hot air furnace, in which case the hot air branch pipe disposed between the combustion chamber of the hot air furnace and the hot air main pipe is an object. Thus, the difference in thermal expansion described later is for the combustion chamber.
  • FIG. 1 is a first process diagram showing an initial installation state of a hot air branch pipe lower horizontal part 4 and a hot air branch pipe vertical part 5 of the hot air branch pipe 3.
  • the hot air branch lower horizontal part 4 is supported by a support 7 and connected to the hot air main pipe 2.
  • the hot air branch vertical part 5 is supported by a jack (support) 9 on the gantry 8, and the lower end part is connected to the hot air branch lower horizontal part 4.
  • the jack 9 is for adjusting the height of the hot air branch pipe vertical part 5. At this time, the hot air branch pipe lower horizontal part 4 is horizontal.
  • the height of the connection location of the hot air branch pipe vertical portion 5 to the hot air furnace main body 1 is higher than the height of the connection portion of the hot air furnace main body 1 to the hot air branch vertical portion 5 by the thermal expansion difference absorption margin ⁇ .
  • Initial installation to be This thermal expansion difference absorption margin ⁇ is set to 0.2 to 1.0 times the thermal expansion difference ⁇ between the hot stove main body 1 and the hot air branch pipe vertical portion 5.
  • Both the hot blast furnace main body 1 and the hot air branch vertical section 5 are of ordinary temperature at the time of construction, but the temperature rises to about 100 ° C. (the hot air temperature is higher) due to the action of the internal bricks at the time of drying and heating described later.
  • the hot stove main body 1 is longer in the height direction (higher in height) than the hot air branch vertical portion 5. Therefore, the amount of thermal expansion in the height direction when the temperature of the drying is increased is larger in the hot stove body 1 than that in the hot air branch vertical portion 5.
  • the difference in the amount of thermal expansion in the height direction is defined as a thermal expansion difference ⁇ .
  • the height of the connecting portion of the hot air branch pipe vertical portion 5 to the hot air furnace main body 1 is higher than the height of the connecting portion of the hot air furnace main body 1 to the hot air branch vertical portion 5 by the thermal expansion difference absorption margin ⁇ .
  • the hot air branch pipe vertical portion 5 is lowered by the thermal expansion difference absorption margin ⁇ with a jack 9, and the connecting portion between the hot air branch pipe vertical portion 5 and the hot stove main body 1 is the same.
  • both are connected in a horizontal state by the hot air branch upper horizontal portion 6. For example, if it is from this state, even if the hot-blast furnace main body 1 side of the hot-air branch pipe upper horizontal part 6 raises to the state of FIG. 6, for example, an internal stress will not become so large.
  • FIG. 2 The state of FIG. 2 is incomplete as a hot stove. This is because, for example, bricks are not stacked in the hot air branch lower horizontal part 4 or the hot air branch upper horizontal part 6. In general, from the viewpoint of strength and workability, bricks are first stacked in the hot air branch lower horizontal portion 4, and bricks are subsequently stacked in the hot air branch upper horizontal portion 5. Therefore, in the present embodiment, as shown in FIG. 3, the hot air branch pipe vertical portion 5 is raised again by the thermal expansion difference absorption margin ⁇ by the jack 9, and the hot air branch pipe lower horizontal portion 4 is brought into a horizontal state, and in this state, A brick is piled in the horizontal part 4 at the lower part of the hot air branch pipe.
  • the hot air branch vertical portion 5 is lowered again by the thermal expansion difference absorption margin ⁇ with a jack 9, and the hot air branch upper horizontal portion 6 is lowered. It is set as a horizontal state, and the brick is piled in the said hot air branch pipe upper horizontal part 6 in the state.
  • the hot air branch upper horizontal portion 6 is in a horizontal state as in the state of FIG. 2, and the internal stress is zero or almost zero. Therefore, it shifts from this state to the drying temperature rise of the hot stove.
  • both the hot stove main body 1 and the hot air branch pipe vertical portion 5 become longer in the height direction due to thermal expansion.
  • the hot stove main body 1 is not only long because the lower end portion is grounded, but the hot air branch vertical portion 5 is not only the upper portion but also supports the support portion of the jack 9. As it becomes longer downward.
  • the jack 9 adjusts the height of the hot air branch vertical portion 5 so that the internal stress of the hot air branch lower horizontal portion 4 and the hot air branch upper horizontal portion 6 does not become too large. Like that.
  • the height of the hot air branch vertical portion 5 is adjusted by the jack 9, and the hot air main pipe 2 side and the hot air branch vertical portion 5 side of the hot air branch lower horizontal portion 4 as shown in FIG.
  • the difference in height is half the actual thermal expansion difference ( ⁇ ) / 2
  • the difference in height between the hot air furnace main body 1 side and the hot air branch vertical part 5 side of the hot air branch upper horizontal part 6 is the actual thermal expansion difference.
  • Half ( ⁇ ) / 2 that is, by making the actual thermal expansion difference ⁇ equal or almost equally divided between the hot air branch upper horizontal portion 6 and the hot air branch lower horizontal portion 4
  • the difference in displacement or the thermal displacement itself can be absorbed as much as possible, and the internal stress of the hot air branch upper horizontal portion 6 and the internal stress of the hot air branch lower horizontal portion 4 can be minimized simultaneously.
  • the inventor sets the length of the vertical part and the horizontal part constituting the hot air branch pipe to be three times or more of the diameters of the hot air branch pipes, and the difference in thermal displacement that occurs when the temperature of the drying is increased.
  • the length of the hot air branch horizontal portions 4 and 6 may be three or more times the tube diameter of the hot air branch horizontal portions 4 and 6, and can be made longer depending on the position of the hot air furnace main body and the hot air furnace main.
  • the length of the vertical portion and a horizontal portion which constitutes the hot air branch pipe when less than three times of their pipe diameter, the analysis results by the finite element method when adding pressure and thermal expansion in a hot air furnace blast of 5000 m 3
  • the largest stress generated in the connecting portion between the hot air branch upper horizontal portion 6 and the hot air branch vertical portion 5 can be suppressed to 210 N / mm 2 and within the allowable fatigue endurance stress.
  • the hot air branch pipe construction method of this embodiment is used in combination, the stress generated at the connecting portion between the hot air branch upper horizontal part 6 and the hot air branch vertical part 5 can be reduced to 140 N / mm 2 , Without using it, the internal stress generated in the hot air branch pipe 3 can be greatly reduced.
  • the hot air branch vertical part 5 with respect to the difference in thermal expansion ⁇ between the hot air furnace main body 1 and the hot air branch vertical part 5 at the time of hot air furnace drying temperature rise.
  • ⁇ 0.2 ⁇ to ⁇
  • the hot air branch pipe vertical portion 5 is supported by a jack 9, and after the initial installation of the hot air branch pipe vertical portion 5, the hot air branch pipe vertical portion 5 is moved down so that the hot air branch pipe vertical portion 5 and the hot air furnace main body 1 are connected. After the hot air branch pipe vertical part 5 and the hot air furnace main body 1 are connected to each other by the hot air branch pipe upper horizontal part 6 at the same height, the hot air furnace body 1 and the hot air branch pipe vertical part 5 undergo thermal expansion during the hot air furnace drying temperature rise. Accordingly, by adjusting the height of the hot air branch vertical part 5, the difference in thermal expansion that occurs during the hot air oven drying temperature rise can be shared by the hot air branch upper horizontal part 6 and the lower horizontal part 4. The difference in thermal displacement and the thermal displacement itself can be absorbed.
  • the height of the hot air branch pipe vertical portion 5 is adjusted so that the actual thermal difference ⁇ between the thermal expansion difference ⁇ and the thermal expansion difference absorption margin ⁇ is changed to the hot air branch upper horizontal portion 6 and the hot air.
  • the difference in thermal displacement and the thermal displacement itself can be absorbed as much as possible.
  • the hot air branch pipe vertical part 5 is raised and the hot air branch lower part horizontal part 4 is leveled.
  • 1 is a hot-blast furnace main body
  • 2 is a hot-air main pipe
  • 3 is a hot-air branch pipe
  • 4 is a hot-air branch pipe lower horizontal part
  • 5 is a hot-air branch pipe vertical part
  • 6 is a hot-air branch pipe upper horizontal part
  • 7 is a support
  • 8 is a mount
  • 9 is Jack [Embodiment 2]
  • FIG. 7 is an overall view of the hot air branch pipe structure of the hot stove of the present embodiment.
  • Reference numeral 11 in the figure denotes a heat storage chamber
  • reference numeral 12 denotes a combustion chamber.
  • symbol 18 in a figure is a hot-air main pipe connected to the annular pipe of a blast furnace.
  • the hot air branch pipe 14 refers to a connecting pipe structure from the combustion chamber 12 to the hot air main pipe 18.
  • an expansion joint is not used at the connecting portion between the heat storage chamber 11 and the combustion chamber 12.
  • each of the heat storage chamber 11, the combustion chamber 12, the hot air branch pipe 14, and the hot air main pipe 18 is covered with a so-called iron skin, but a brick for protecting the iron skin is stacked inside. Brick is specially stacked to absorb thermal expansion and contraction.
  • the hot air branch pipe 14 of this embodiment includes a hot air branch first horizontal portion 15 connected to the combustion chamber 12, a hot air branch vertical portion 16 connected to the hot air branch first horizontal portion 15, a hot air branch vertical portion 16 and a hot air main pipe. And a hot-air branch pipe second horizontal portion 17 that connects to the first and second horizontal portions 17.
  • Each part of the hot air branch pipe 14 is heated only from a normal temperature at the time of construction to about 100 ° C. at the time of operation by bricks stacked inside, but a difference in thermal displacement due to thermal deformation or a thermal mutation itself occurs. . Therefore, conventionally, as shown in FIG. 9, the expansion joint A is used for the hot air branch first horizontal portion 15 and the hot air branch second horizontal portion 17 to absorb them. Further, a tension beam 13 for taking the reaction force is also provided at the site where the expansion joint A is used.
  • the length of the hot air branch first horizontal portion 15 is set to be not less than three times the diameter of the hot air branch first horizontal portion 15 and the length of the hot air branch vertical 16 is longer. Is set to at least three times the tube diameter of the hot air branch pipe vertical portion 16, and the length of the hot air branch pipe second horizontal portion 17 is set to be at least three times the tube diameter of the hot air branch pipe second horizontal portion 17. It was set as the structure which does not use.
  • Each tube diameter indicates the outer diameter of the tube portion.
  • each length shows the distance between the intersections of the centerline in the connection location with the pipe part to connect.
  • the length of the hot air branch vertical 16 is preferably not less than 3 times and not more than 6 times the tube diameter of the hot air branch vertical part 16. It is more desirable to be 5 times or more and 5.5 times or less.
  • the length of the hot air branch first horizontal portion 15 may be three times or more the tube diameter of the hot air branch first horizontal portion 15 and can be made longer depending on the positions of the hot air furnace main body and the hot air furnace main.
  • the length of the hot air branch second horizontal portion 17 may be three times or more the tube diameter of the hot air branch second horizontal portion 17 and can be made longer depending on the positions of the hot air furnace main body and the hot air furnace main.
  • the tube diameter By satisfying such a diameter and length of the tube diameter, for example, the difference between the thermal displacement of the hot air branch first horizontal portion 15 and the heat displacement of the hot air branch second horizontal portion 17 and the hot air branch vertical portion 16 itself.
  • the heat displacement itself can be absorbed by the elastic deformation of the hot air branch pipe vertical portion 16, and as a result, the expansion joint is not required.
  • it is an analysis result by a finite element method when internal pressure and thermal expansion are applied in a hot blast furnace of a 5,000 m 3 blast furnace.
  • the largest stress is applied to the connecting portion between the hot air branch first horizontal portion 15 and the hot air branch vertical portion 16. Although it was found that this occurred, the magnitude was 210 N / mm 2 , which was within the tolerance of fatigue endurance stress.
  • FIG. 7 shows a so-called best mode in which the expansion joint is not used in the connecting portion between the heat storage chamber 11 and the combustion chamber 12 using the technique described in Patent Document 1, but the hot blast furnace of the blast furnace according to the present invention.
  • the expansion joint In the hot air branch pipe structure, it is not necessarily assumed that the expansion joint is not used.
  • the expansion joint A and the tension beam 13 are used for the hot air branch second horizontal portion 17.
  • the expansion joint A and the tension beam 13 are used in the hot air branch first horizontal portion 15.
  • FIG. 8 c the expansion joint A and the tension beam 13 are used at the connecting portion between the heat storage chamber 11 and the combustion chamber 12. Further, in FIG.
  • the expansion joint A and the tension beam 13 are used for the connecting portion of the heat storage chamber 11 and the combustion chamber 12 and the hot air branch first horizontal portion 15. Further, in FIG. 8 e, the expansion joint A and the tension beam 13 are used for the connecting portion of the heat storage chamber 11 and the combustion chamber 12 and the hot air branch second horizontal portion 17.
  • the length of the hot air branch first horizontal portion 15 is three times or more the diameter of the hot air branch first horizontal portion 15 and the length of the hot air branch vertical 16 is the hot air branch vertical portion. 6 and the length of the hot air branch second horizontal portion 17 is three times or more the tube diameter of the hot air branch second horizontal portion 17. Therefore, in each pipe part constituting the hot air branch pipe 14, since the difference in thermal displacement and the thermal displacement itself can be absorbed by its own elastic deformation, even if an expansion joint is used, the load on the expansion joint is small. Further, since deformation (displacement) is small, it does not become a big problem as in the conventional case.
  • the length of the vertical portion 16 and the horizontal portions 15 and 17 of the hot air branch tube 14 is set to be three times or more of the respective tube diameters. Even if a difference in displacement or a thermal displacement itself occurs, it can be absorbed by elastic deformation of the tube itself. As a result, it is not necessary to use an expansion joint, and various problems related to the expansion joint can be avoided. [Explanation of symbols]
  • 11 is a heat storage chamber
  • 12 is a combustion chamber
  • 13 is a tension beam
  • 14 is a hot air branch pipe
  • 15 is a hot air branch pipe first horizontal part
  • 16 is a hot air branch pipe vertical part
  • 17 is a hot air branch pipe second horizontal part
  • 18 is a hot air main pipe
  • A is an expansion joint

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
PCT/JP2011/056121 2011-03-09 2011-03-09 高炉の熱風炉の熱風支管構築方法及び熱風支管 WO2012120691A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2011/056121 WO2012120691A1 (ja) 2011-03-09 2011-03-09 高炉の熱風炉の熱風支管構築方法及び熱風支管
CN201180068978.6A CN103415629B (zh) 2011-03-09 2011-03-09 高炉热风炉的热风支管构筑方法及热风支管
KR1020137022346A KR101445516B1 (ko) 2011-03-09 2011-03-09 용광로 열풍로의 열풍지관 구축방법 및 열풍지관

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/056121 WO2012120691A1 (ja) 2011-03-09 2011-03-09 高炉の熱風炉の熱風支管構築方法及び熱風支管

Publications (1)

Publication Number Publication Date
WO2012120691A1 true WO2012120691A1 (ja) 2012-09-13

Family

ID=46797685

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2011/056121 WO2012120691A1 (ja) 2011-03-09 2011-03-09 高炉の熱風炉の熱風支管構築方法及び熱風支管

Country Status (3)

Country Link
KR (1) KR101445516B1 (zh)
CN (1) CN103415629B (zh)
WO (1) WO2012120691A1 (zh)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011068971A (ja) * 2009-09-28 2011-04-07 Jfe Steel Corp 高炉の熱風炉の熱風支管構築方法
JP2011068972A (ja) * 2009-09-28 2011-04-07 Jfe Steel Corp 高炉の熱風炉の熱風支管構造
CN103114167A (zh) * 2013-02-21 2013-05-22 李富朝 自锁密封式高炉热风管道三岔口新型组合砖结构
JP2017053030A (ja) * 2015-09-08 2017-03-16 Ｊｆｅスチール株式会社 熱風炉の構築方法及び熱風炉
JP2021025059A (ja) * 2019-07-31 2021-02-22 日鉄エンジニアリング株式会社 熱風管の延長方法および熱風炉の増設方法
CN114580680A (zh) * 2022-03-29 2022-06-03 广东韶钢松山股份有限公司 一种外燃式热风炉拱顶联络管温度场系统维护方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6949683B2 (ja) * 2017-11-27 2021-10-13 株式会社Ｉｈｉポールワース 熱風炉

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05239519A (ja) * 1992-02-28 1993-09-17 Kawasaki Steel Corp 外燃式熱風炉の構造
JP2011068972A (ja) * 2009-09-28 2011-04-07 Jfe Steel Corp 高炉の熱風炉の熱風支管構造
JP2011068971A (ja) * 2009-09-28 2011-04-07 Jfe Steel Corp 高炉の熱風炉の熱風支管構築方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57161012A (en) * 1981-03-30 1982-10-04 Kawasaki Steel Corp Adjusting method fof thermal displacement of outside burning type hot stove
JPS59110710A (ja) * 1982-12-14 1984-06-26 Kobe Steel Ltd 高炉用熱風炉の操業方法
JP3277029B2 (ja) * 1993-06-23 2002-04-22 川崎製鉄株式会社 外燃式熱風炉の連結構造
CN201265021Y (zh) * 2008-09-19 2009-07-01 北京明诚环保科技有限公司 三角形布置的高炉热风炉系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05239519A (ja) * 1992-02-28 1993-09-17 Kawasaki Steel Corp 外燃式熱風炉の構造
JP2011068972A (ja) * 2009-09-28 2011-04-07 Jfe Steel Corp 高炉の熱風炉の熱風支管構造
JP2011068971A (ja) * 2009-09-28 2011-04-07 Jfe Steel Corp 高炉の熱風炉の熱風支管構築方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
THE IRON AND STEEL INSTITUTE OF JAPAN, vol. 2, no. 3RD ED, 15 October 1979 (1979-10-15), pages 305 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011068971A (ja) * 2009-09-28 2011-04-07 Jfe Steel Corp 高炉の熱風炉の熱風支管構築方法
JP2011068972A (ja) * 2009-09-28 2011-04-07 Jfe Steel Corp 高炉の熱風炉の熱風支管構造
CN103114167A (zh) * 2013-02-21 2013-05-22 李富朝 自锁密封式高炉热风管道三岔口新型组合砖结构
CN103114167B (zh) * 2013-02-21 2014-04-23 郑州安耐克实业有限公司 自锁密封式高炉热风管道三岔口新型组合砖结构
JP2017053030A (ja) * 2015-09-08 2017-03-16 Ｊｆｅスチール株式会社 熱風炉の構築方法及び熱風炉
JP2021025059A (ja) * 2019-07-31 2021-02-22 日鉄エンジニアリング株式会社 熱風管の延長方法および熱風炉の増設方法
JP7247047B2 (ja) 2019-07-31 2023-03-28 日鉄エンジニアリング株式会社 熱風管の延長方法および熱風炉の増設方法
CN114580680A (zh) * 2022-03-29 2022-06-03 广东韶钢松山股份有限公司 一种外燃式热风炉拱顶联络管温度场系统维护方法
CN114580680B (zh) * 2022-03-29 2023-01-06 广东韶钢松山股份有限公司 一种外燃式热风炉拱顶联络管温度场系统维护方法

Also Published As

Publication number Publication date
KR20130109239A (ko) 2013-10-07
KR101445516B1 (ko) 2014-09-29
CN103415629B (zh) 2015-10-07
CN103415629A (zh) 2013-11-27

Similar Documents

Publication Publication Date Title
WO2012120691A1 (ja) 高炉の熱風炉の熱風支管構築方法及び熱風支管
JP5702889B2 (ja) 高炉の羽口部構造
JP5347872B2 (ja) 高炉の熱風炉の熱風支管構築方法
US9194013B2 (en) Hot blast stove dome and hot blast stove
JP2007107785A (ja) ボイラ設備の据付工法
KR20120137762A (ko) 압력 밸런스 타입 익스펜션 조인트
JP2007107789A (ja) ボイラ設備の据付工法
JP5347873B2 (ja) 高炉の熱風炉の熱風支管構造
CN103451341A (zh) 一种热风炉热风管道补偿器砌筑结构
CN203686403U (zh) 高温烟管对接装置
JP5388280B2 (ja) 高温ガス用配管伸縮部の構造
JP5092628B2 (ja) 熱風炉の建設方法
JPH09303713A (ja) 蓄熱交互燃焼式ラジアントチューブの炉内支持構造
EP0632136B1 (en) Dome connecting structure of external combustion hot stove for blast furnace
JP6372531B2 (ja) 熱風炉の構築方法及び熱風炉
CN101008553A (zh) 一种热风炉热风管道膨胀节内衬结构
CN108165694A (zh) 一种热风管道结构和热风输送系统
JP2023183345A (ja) コークス炉バーナ配管およびコークス炉燃料ダクト劣化補修方法
CN215947336U (zh) 一种高炉热风管道结构
JP2023157171A (ja) 熱風炉の構築方法及び熱風炉
JPS5947309A (ja) 熱風管のレンガ積方法
CN106702061A (zh) 一种顶燃热风炉的布置方法
CN115031249A (zh) 一种高温烟气排气系统柔性连接段
JP2680514B2 (ja) ボイラ用高温ウインドボックス
JP4336231B2 (ja) ボイラ装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11860511

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 20137022346

Country of ref document: KR

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11860511

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP