JPH04362108A - Device for spraying water in blast furnace - Google Patents
Device for spraying water in blast furnaceInfo
- Publication number
- JPH04362108A JPH04362108A JP13904591A JP13904591A JPH04362108A JP H04362108 A JPH04362108 A JP H04362108A JP 13904591 A JP13904591 A JP 13904591A JP 13904591 A JP13904591 A JP 13904591A JP H04362108 A JPH04362108 A JP H04362108A
- Authority
- JP
- Japan
- Prior art keywords
- water
- furnace
- blast furnace
- spray
- supply pipe
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 97
- 238000005507 spraying Methods 0.000 title abstract description 7
- 239000007921 spray Substances 0.000 claims description 32
- 239000000498 cooling water Substances 0.000 abstract description 15
- 238000001816 cooling Methods 0.000 abstract description 7
- 239000000571 coke Substances 0.000 abstract description 4
- 230000001939 inductive effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 17
- 230000000630 rising effect Effects 0.000 description 9
- 241000237983 Trochidae Species 0.000 description 5
- 210000001015 abdomen Anatomy 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Blast Furnaces (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は、高炉内部の散水装置に
関し、詳しくは減尺休風および減尺吹卸しを行うに当た
って、高炉内部で散水を行う散水装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water sprinkling device inside a blast furnace, and more particularly to a water sprinkling device for sprinkling water inside a blast furnace during reduced-scale wind rest and reduced-scale blowdown.
【0002】0002
【従来の技術】従来、高炉操業において減尺吹卸しを行
う場合の問題点は、溶銑温度を保ちながら炉頂機器設備
の保護を図るため、炉頂ガス温度を一定温度以下に保持
しなければならないところにある。この問題点を解決す
る方策として、炉頂部から炉内に挿入された固定式の複
数個の散水ノズルを用いて冷却が行われている。この例
として実開昭62−194747号等がある。[Prior Art] Conventionally, the problem with performing reduced-scale blowdown in blast furnace operation is that in order to protect the top equipment while maintaining the hot metal temperature, the top gas temperature must be maintained below a certain temperature. It's in a place where it shouldn't be. As a measure to solve this problem, cooling is performed using a plurality of fixed water spray nozzles inserted into the furnace from the top of the furnace. An example of this is Utility Model Application No. 62-194747.
【0003】散水に際しては、高炉底部から上昇する高
温の炉内ガスを効率的に冷却するために、散水範囲、散
水量及び散水水滴の大きさ等が選定される。以下に、従
来の散水装置について説明する。[0003] When spraying water, the range of water spraying, the amount of water to be sprayed, the size of water droplets, etc. are selected in order to efficiently cool the high-temperature furnace gas rising from the bottom of the blast furnace. A conventional water sprinkler device will be explained below.
【0004】図2は従来技術の高炉炉頂散水装置の一例
を示し、1は散水ノズル、2は給水用配管、8は下ベル
、10は炉頂鉄皮、11はベルカップ、12は鉱石受金
物、15はムーバブルアーマーをそれぞれ示す。図3(
a)は従来技術における炉内縦断面方向の散水状況を示
し、(b)は同図(a)のA−A線断面図(炉胸部)、
(c)は同図(a)のB−B線断面図(炉腹部)をそれ
ぞれ示す。図中1は散水ノズル、2は給水用配管、5は
装入物レベル、6は噴霧水、7は散水範囲、8は下ベル
、10は炉頂鉄皮、11はベルカップ、13は羽口、1
4はレースウエイをそれぞれ示す。FIG. 2 shows an example of a conventional blast furnace top watering system, in which 1 is a watering nozzle, 2 is a water supply pipe, 8 is a lower bell, 10 is a furnace top shell, 11 is a bell cup, and 12 is an ore. 15 indicates a movable armor. Figure 3 (
(a) shows the water sprinkling situation in the vertical cross-sectional direction inside the reactor in the conventional technology, (b) is a cross-sectional view (furnace chest) taken along the line A-A in the same figure (a),
(c) shows a cross-sectional view (furnace belly) taken along the line B-B in FIG. 1 (a). In the figure, 1 is the water nozzle, 2 is the water supply pipe, 5 is the charge level, 6 is the spray water, 7 is the water spray range, 8 is the lower bell, 10 is the furnace top shell, 11 is the bell cup, and 13 is the blade. mouth, 1
4 each indicates a raceway.
【0005】図2に示す散水装置は散水ノズル1が給水
用配管2の先端に炉底を指向して固定されているため散
水範囲7は一定となる。この状況を示したものが図3で
ある。図3は円周方向に散水ノズル1を4個配置した例
で、同図(a)は散水ノズル1から扇状に散水される噴
霧水6の状況を示し、炉胸部では、同図(b) に示す
ように噴霧水6の散水範囲7は不均一で、しかも散水範
囲7の外周には散水されない部分がかなりある。また、
同図(c) は炉腹部の散水状況で、噴霧水6の散水範
囲7はほぼ炉内を覆っているものの、散水範囲7は不均
一である。In the water sprinkling device shown in FIG. 2, the water sprinkling nozzle 1 is fixed to the tip of the water supply pipe 2 so as to face the furnace bottom, so that the water sprinkling area 7 is constant. FIG. 3 shows this situation. Fig. 3 shows an example in which four water spray nozzles 1 are arranged in the circumferential direction, and Fig. 3 (a) shows the spray water 6 sprayed in a fan shape from the water spray nozzles 1, and Fig. 3 (b) As shown in FIG. 2, the spraying range 7 of the spray water 6 is non-uniform, and there are considerable portions on the outer periphery of the spraying range 7 that are not sprayed with water. Also,
Figure (c) shows the state of water sprinkling in the reactor abdomen, and although the water spray range 7 of the spray water 6 almost covers the inside of the reactor, the water spray range 7 is non-uniform.
【0006】このように従来装置では、噴霧水6は炉内
上昇ガスを均一に覆うことができず、目的とする効率的
な冷却を行うことが困難である。[0006] As described above, in the conventional apparatus, the spray water 6 cannot uniformly cover the rising gas in the furnace, making it difficult to achieve the desired efficient cooling.
【0007】[0007]
【発明が解決しようとする課題】ところで、上述のよう
に固定式の散水ノズルを使用する場合、装入物レベルの
降下に応じて、冷却水の炉内上昇ガスを覆う範囲は変化
し、冷却能力に偏りが生じてくる。[Problems to be Solved by the Invention] By the way, when using a fixed water spray nozzle as described above, the range of cooling water that covers the rising gas in the furnace changes depending on the drop in the charge level. There will be a bias in ability.
【0008】このため、不足した冷却能力を高めるため
に散水量を増すと、冷却水は炉内上昇ガスの冷却過程で
気化しきれず、局部的に炉内装入物に達し、装入物を冷
却することになる。従って、装入物は十分に溶解しきれ
ず、かつ、冷却水と赤熱コークスとが接触し水性ガス反
応
H2 O+C→CO+H2
を起こし、コークスを消費しながら炉頂ガス中のCO、
H2濃度を上昇させるため、炉内に酸素が侵入する様な
状態に至った場合(鉄皮亀裂など)には、爆発限界内に
入る恐れがあつた。For this reason, when the amount of water sprinkled is increased to improve the insufficient cooling capacity, the cooling water cannot be completely vaporized during the cooling process of the rising gas in the furnace, and locally reaches the contents in the furnace, damaging the charges. It will cool down. Therefore, the charge is not fully melted, and the cooling water and red-hot coke come into contact, causing a water gas reaction H2 O+C→CO+H2, and while coke is being consumed, CO in the top gas is
In order to increase the H2 concentration, if a situation were to occur in which oxygen could enter the furnace (such as cracks in the steel shell), there was a risk that it would fall within the explosive limit.
【0009】また、図3(a)に示すように装入物レベ
ル5が炉腹以下の下部になると、冷却水は直接炉壁部に
かかり、炉壁部を伝わって羽口13の前面まで降下する
場合がある。この時、冷却水は滓沸き現象あるいは滓の
凝固による羽口閉塞等のトラブルを誘発し、順調な減尺
吹卸し作業を阻害してしまう。これを回避するための一
手段として、直径方向に配置された散水ノズルの使い分
けを行うこともあるが、炉壁部に冷却水をかけず、しか
も効率の良い散水状態を持続させる調整は困難であった
。Furthermore, as shown in FIG. 3(a), when the charge level 5 is below the furnace belly, the cooling water directly hits the furnace wall and flows along the furnace wall to the front of the tuyere 13. It may descend. At this time, the cooling water causes troubles such as slag boiling or tuyere clogging due to solidification of the slag, which impedes the smooth blowing and unloading operation. One way to avoid this is to use water spray nozzles arranged diametrically, but it is difficult to make adjustments that do not spray cooling water onto the furnace wall and maintain efficient water spray conditions. there were.
【0010】0010
【課題を解決するための手段】本発明は、上記の問題点
に鑑み、炉内部の散水装置において、装入物レベルの降
下に応じて炉内ガスの均一な冷却を図ることを目的とし
て、鋭意研究を行い、検討を重ねた結果完成されたもの
で、その要旨は、円周方向に所定間隔に、かつ、高炉の
軸芯と平行な鉛直面内において、昇降自在に給水管を設
け、この給水管先端に炉頂方向を指向する散水ノズルを
固定した高炉内散水装置である。[Means for Solving the Problems] In view of the above-mentioned problems, the present invention aims to uniformly cool the gas in the furnace in accordance with the drop in the charge level in the water sprinkler inside the furnace. It was completed as a result of extensive research and consideration, and its gist is that water supply pipes are installed at predetermined intervals in the circumferential direction and in a vertical plane parallel to the axis of the blast furnace, so that they can be raised and lowered freely. This is an in-blast furnace water sprinkling device in which a water sprinkling nozzle oriented toward the top of the furnace is fixed to the tip of this water supply pipe.
【0011】[0011]
【作用】散水に当たっては、装入物レベルの降下に応じ
て、散水範囲の変化を抑制するように給水管先端に固定
した散水ノズルを、高炉の軸芯と平行な鉛直面内におい
て炉体上下方向に移動させ、炉頂方向を指向する散水ノ
ズルから散水を行う。このことによって、冷却水は炉内
上昇ガスを完全に覆うことができ、また、冷却水は炉頂
方向に噴出されるため上昇および下降時にガスを均一に
冷却することができ、かつ、装入物に達するまでに気化
してしまう。[Operation] During water sprinkling, the water nozzle fixed to the tip of the water supply pipe is placed above and below the furnace body in a vertical plane parallel to the axis of the blast furnace, so as to suppress changes in the water sprinkling range as the charge level falls. water from the water nozzle pointing toward the top of the furnace. This allows the cooling water to completely cover the rising gas in the reactor, and since the cooling water is ejected toward the top of the reactor, the gas can be uniformly cooled during rising and descending. It evaporates before it reaches the object.
【0012】従って、過剰に冷却能力を高める必要もな
く、冷却水を有効に利用でき、冷却水が炉内装入物に達
することもなく、かつ、羽口閉塞等のトラブルを誘発す
ることなく順調な減尺吹卸し作業を行うことができる。Therefore, there is no need to increase the cooling capacity excessively, the cooling water can be used effectively, the cooling water does not reach the contents in the reactor, and the process is proceeding smoothly without causing troubles such as tuyere clogging. It is possible to carry out reduced-length blow-off work.
【0013】[0013]
【実施例】以下、図示の実施例によって本発明について
詳述する。図1は本発明に係わる高炉内散水装置の実施
例を示し、1は散水ノズル、2は給水用配管、3は給水
用配管支持具、4はシール装置、5は装入物レベル、6
は噴霧水、7は散水範囲、8は下ベル、9は上ベル、1
0は炉頂鉄皮、11はベルカップ、Lは装入物レベル5
と散水ノズル1との距離をそれぞれ示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to illustrated embodiments. FIG. 1 shows an embodiment of the blast furnace water sprinkling system according to the present invention, in which 1 is a water spray nozzle, 2 is a water supply pipe, 3 is a water supply pipe support, 4 is a sealing device, 5 is a charge level, 6
is the spray water, 7 is the watering range, 8 is the lower bell, 9 is the upper bell, 1
0 is top shell, 11 is bell cup, L is charge level 5
and the distance from the water spray nozzle 1, respectively.
【0014】散水ノズル1は給水用配管2の先端に上向
きに取りつけられ、取りつけ角度は可変である。給水用
配管2は、炉頂鉄皮10に取りつけられた給水用配管支
持具3を介して炉内に垂設され、炉外の上下駆動装置(
図示せず)によって上下に移動することができる。The water spray nozzle 1 is attached upward to the tip of the water supply pipe 2, and the attachment angle is variable. The water supply pipe 2 is vertically installed inside the furnace via a water supply pipe support 3 attached to the furnace top shell 10, and is connected to a vertical drive device (
(not shown) can be moved up and down.
【0015】さらに、給水用配管2はフレキシブルホー
ス(図示せず)、水量制御弁(図示せず)を介して給水
本管に接続されている。給水用配管2と給水用配管支持
具3との間隙はシール装置4によつてシールされている
。Furthermore, the water supply pipe 2 is connected to a main water supply pipe via a flexible hose (not shown) and a water flow control valve (not shown). A gap between the water supply pipe 2 and the water supply pipe support 3 is sealed by a sealing device 4.
【0016】冷却水は水量制御弁、フレキシブルホース
を経由し、給水用配管2を通って散水ノズル1から噴霧
水6として噴出される。また、冷却水量は装入物レベル
5に応じて調整する。The cooling water passes through a water flow control valve, a flexible hose, a water supply pipe 2, and is ejected as spray water 6 from a water spray nozzle 1. Further, the amount of cooling water is adjusted according to the charge level 5.
【0017】減尺吹卸しに当たっては、給水用配管2は
装入物レベル5の降下に応じて、装入物レベル5と散水
ノズル1との距離Lをある一定値に保持しながら降下す
る。また、散水ノズル1の上向き角度も装入物レベル5
の降下に応じて調整する。During the reduced-length blowdown, the water supply pipe 2 descends in accordance with the fall of the charge level 5 while maintaining the distance L between the charge level 5 and the water spray nozzle 1 at a certain constant value. In addition, the upward angle of the water spray nozzle 1 is also at charge level 5.
Adjust according to the drop.
【0018】このことによつて、散水ノズル1から上向
きに噴出される噴霧水6は装入物レベル5に応じた最適
なガス冷却を行うことができる。すなわち、上向きに噴
出された噴霧水6は、上昇および下降時にガスを冷却し
、気化してしまう。このため、噴霧水6は気化せずに装
入物の表面にまで到達することはない。As a result, the spray water 6 ejected upward from the water nozzle 1 can be optimally cooled with gas according to the charge level 5. That is, the spray water 6 ejected upward cools the gas and vaporizes it as it ascends and descends. Therefore, the spray water 6 does not reach the surface of the charge without being vaporized.
【0019】図1(b)は円周方向に4本の給水用配管
2を設け、4個の散水ノズル1から散水した時の噴霧水
6の散水範囲7を示したもので、散水範囲7はほぼ同心
円状であり、噴霧水6は炉壁を濡らすことなく、上昇ガ
スを均一に冷却することができる。なお、装入物レベル
に応じて、従来の固定式炉頂散水装置と本装置とを組み
合わせて使用することは炉内上昇ガスの冷却に効果的で
ある。FIG. 1(b) shows the spray range 7 of the spray water 6 when four water supply pipes 2 are provided in the circumferential direction and water is sprayed from the four water spray nozzles 1. are substantially concentric circles, and the spray water 6 can uniformly cool the rising gas without wetting the furnace wall. Depending on the charge level, it is effective to use the conventional fixed furnace top water sprinkler system in combination with this system to cool the rising gas in the furnace.
【0020】[0020]
【発明の効果】以上説明したように、本発明に係わる高
炉内散水装置は、散水ノズルの位置を高炉の軸芯と平行
な鉛直面内において炉体上下方向に随意に移動させるこ
とができ、冷却水を霧状にし、炉内上昇ガスを完全に覆
うことができ、ガスを均一に冷却することができる。[Effects of the Invention] As explained above, the blast furnace water sprinkling device according to the present invention allows the position of the water nozzle to be moved at will in the vertical direction of the furnace body within a vertical plane parallel to the axis of the blast furnace. The cooling water can be atomized to completely cover the rising gas in the furnace, and the gas can be cooled uniformly.
【0021】このため、本散水装置は過剰に冷却能力を
高める必要もなく、また、冷却水と赤熱コークスとの水
性ガス反応を抑制することができ、かつ、羽口閉塞等の
トラブルを誘発することなく順調な減尺吹卸し作業を行
うことができるという優れた効果を有するものである。[0021] Therefore, the present water sprinkler does not require excessively increasing the cooling capacity, and can suppress the water gas reaction between the cooling water and the red-hot coke, which also prevents troubles such as tuyere clogging. This has the excellent effect of allowing smooth unloading work of reduced length without any problems.
【図面の簡単な説明】[Brief explanation of drawings]
【図1】本発明に係わる高炉内散水装置を示す図である
。FIG. 1 is a diagram showing an in-blast furnace water sprinkling device according to the present invention.
【図2】従来技術の高炉炉頂散水装置の一例を示す図で
ある。FIG. 2 is a diagram showing an example of a conventional blast furnace top watering device.
【図3】(a)は従来技術における炉内縦断面方向の散
水状況を、(b)は同図(a)のA−A線断面図(炉胸
部)を、(c)は同図(a)のB−B線断面図(炉腹部
)を示す図である。[Fig. 3] (a) shows the water sprinkling situation in the vertical cross-sectional direction of the reactor in the conventional technology, (b) shows the sectional view (furnace chest) taken along the line A-A in Fig. It is a figure which shows the BB line sectional view (furnace part) of a).
1…散水ノズル、2…給水用配管、3…給水用配管支持
具、4…シール装置、5…装入物レベル、6…噴霧水、
7…散水範囲、8…下ベル、9…上ベル、10…炉頂鉄
皮、11…ベルカップ、12…鉱石受金物、13…羽口
、14…レースウエイ、15…ムーバブルアーマー、L
…装入物レベルと散水ノズルとの距離。1... Water nozzle, 2... Water supply pipe, 3... Water supply pipe support, 4... Seal device, 5... Charge level, 6... Spray water,
7... Watering range, 8... Lower bell, 9... Upper bell, 10... Furnace top shell, 11... Bell cup, 12... Ore receiver, 13... Tuyere, 14... Raceway, 15... Movable armor, L
...distance between charge level and watering nozzle.
Claims (1)
軸芯と平行な鉛直面内において、昇降自在に給水管を設
け、この給水管先端に炉頂方向を指向する散水ノズルを
固定したことを特徴とする高炉内散水装置。Claim 1: Water supply pipes are provided at predetermined intervals in the circumferential direction and in a vertical plane parallel to the axis of the blast furnace, and are movable up and down, and a water spray nozzle oriented toward the top of the furnace is fixed to the tip of the water supply pipe. An in-blast furnace water sprinkling device that is characterized by:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13904591A JPH04362108A (en) | 1991-06-11 | 1991-06-11 | Device for spraying water in blast furnace |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13904591A JPH04362108A (en) | 1991-06-11 | 1991-06-11 | Device for spraying water in blast furnace |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04362108A true JPH04362108A (en) | 1992-12-15 |
Family
ID=15236181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13904591A Pending JPH04362108A (en) | 1991-06-11 | 1991-06-11 | Device for spraying water in blast furnace |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04362108A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016003350A (en) * | 2014-06-16 | 2016-01-12 | Jfeスチール株式会社 | Method for spraying water to blast furnace top |
JP2021091948A (en) * | 2019-12-12 | 2021-06-17 | 日本製鉄株式会社 | Operation method of blast furnace |
-
1991
- 1991-06-11 JP JP13904591A patent/JPH04362108A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016003350A (en) * | 2014-06-16 | 2016-01-12 | Jfeスチール株式会社 | Method for spraying water to blast furnace top |
JP2021091948A (en) * | 2019-12-12 | 2021-06-17 | 日本製鉄株式会社 | Operation method of blast furnace |
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