JPH0445036Y2 - - Google Patents
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- Publication number
- JPH0445036Y2 JPH0445036Y2 JP1987106395U JP10639587U JPH0445036Y2 JP H0445036 Y2 JPH0445036 Y2 JP H0445036Y2 JP 1987106395 U JP1987106395 U JP 1987106395U JP 10639587 U JP10639587 U JP 10639587U JP H0445036 Y2 JPH0445036 Y2 JP H0445036Y2
- Authority
- JP
- Japan
- Prior art keywords
- dust
- nozzle
- gas flow
- gas
- gas cooler
- 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
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- Cleaning In General (AREA)
- Incineration Of Waste (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は溶銑、溶鋼処理設備等で発生するダス
トを含んだ高温ガスを冷却するガス冷却器のダス
トブロー装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a dust blowing device for a gas cooler that cools high-temperature gas containing dust generated in hot metal, molten steel processing equipment, etc.
従来の例えば溶銑処理設備のガス冷却器水平部
では、排ガス内のダストが内部に堆積するのを防
止するために、ガス流速を20〜30m／ｓに増速し
ていた。
In conventional gas cooler horizontal sections of hot metal processing equipment, for example, the gas flow velocity has been increased to 20 to 30 m/s in order to prevent dust in the exhaust gas from accumulating inside.
従来、ダスト堆積防止装置としては、特公昭52
−49914号並びに特開昭53−4362号公報等が開示
されている。 Conventionally, as a dust accumulation prevention device,
-49914 and Japanese Unexamined Patent Publication No. 53-4362, etc. are disclosed.
ところで従来の技術では、ガス流速を20〜
30m／ｓにするためにガス冷却器の内径を小さく
し、必要な伝熱面積を確保するためにガス冷却器
の長さを長くする必要があつた。
By the way, with conventional technology, the gas flow rate is
In order to achieve 30 m/s, it was necessary to reduce the inner diameter of the gas cooler and increase the length of the gas cooler to secure the necessary heat transfer area.
従つてガス冷却器の長さが非常に長くなり、設
置スペース内に納まらなかつたり、ガス流速が早
いため圧力損失力も大きく、排ガスブロワー用電
動機容量をアツプする必要があつた。 Therefore, the length of the gas cooler has become very long and cannot be accommodated within the installation space, and the gas flow rate is high, resulting in a large pressure loss force, making it necessary to increase the capacity of the electric motor for the exhaust gas blower.
また設置スペース内に納めるため、ガス冷却器
の流速を20〜30m／ｓにしようとすれば、本考案
者の一試算例では、ガス冷却器の内径を1.6mか
ら3.3mとし、排ガス流路の面積が４倍となり、
排ガスブロワーの風量を４倍以上にする必要があ
る。 In addition, in order to fit within the installation space, if the flow velocity of the gas cooler is to be set at 20 to 30 m/s, an example of the inventor's calculation is that the inner diameter of the gas cooler will be 1.6 m to 3.3 m, and the exhaust gas flow path will be The area of is quadrupled,
It is necessary to increase the air volume of the exhaust gas blower by more than four times.
さらに圧力損失も大きくなることから、排ガス
ブロワー用電動機の容量も５〜６倍以上となつ
た。また、排ガスブロワーの出側に設けている集
塵装置の容量も大巾にアツプする。このため設備
費が高くなるという問題が生じ、さらに20〜
30m／ｓの排ガス流速を確保しても、完全にダス
ト堆積を防止することができず、定期的に作業者
がガス冷却器内に入り、ダスト排出作業を行う必
要があつた。 Furthermore, since the pressure loss also increases, the capacity of the exhaust gas blower motor has also increased by 5 to 6 times or more. In addition, the capacity of the dust collector provided on the outlet side of the exhaust gas blower will also be significantly increased. This caused the problem of high equipment costs, and an additional
Even with an exhaust gas flow rate of 30 m/s, it was not possible to completely prevent dust accumulation, and workers were required to periodically enter the gas cooler to remove dust.
この排出作業を行うための費用はもとより、排
出作業中の操業休止による溶銑処理設備の稼動率
低下は大きな問題であつた。 Not only the cost of carrying out this discharge work, but also the reduction in the operating rate of the hot metal processing equipment due to suspension of operation during the discharge work was a major problem.
また、ダスト堆積部では、水管がダスト覆わ
れ、冷却効率が大巾に低下していた。 Additionally, in the dust accumulation area, the water pipes were covered with dust, significantly reducing cooling efficiency.
本考案は上記問題点を解決した冷却器のダスト
ブロー装置を提供する。 The present invention provides a dust blowing device for a cooler that solves the above problems.
かかる問題点を解決するための本考案は、ダス
トを含んだ高温ガスを冷却する管形状のガス冷却
器の水平内壁面に、幅方向の吹き付け角度が20〜
120度、ノズル吹き付け方向がガス流れ方向であ
つて、水平内壁面に対して０〜15度の取付け角度
を有するフラツトノズルをガス流れ方向に複数段
配設し、そのフラツトノズルの吹き付けをガス流
れの下流側から上流側へ、順次吹き付け停止を繰
り返すためのオンオフ弁を、ガス流れ方向の各段
のノズル毎に設けたことを特徴とするガス冷却器
のダストブロー装置である。
The present invention aims to solve this problem by spraying the horizontal inner wall surface of a tube-shaped gas cooler that cools high-temperature gas containing dust at a widthwise blowing angle of 20 to
Multiple stages of flat nozzles are arranged in the gas flow direction, and the nozzle spray direction is the gas flow direction, and the installation angle is 0 to 15 degrees with respect to the horizontal inner wall surface. This dust blowing device for a gas cooler is characterized in that an on/off valve for repeating blowing and stopping sequentially from the side to the upstream side is provided for each nozzle at each stage in the gas flow direction.
幅方向の吹き付け角度が20〜120度、ノズル吹
き付け方向がガス流れ方向であつて、水平内壁面
に対して０〜15度の取付け角度を有するフラツト
ノズルを使用することによつて、冷却器の水平内
壁面に堆積したダストに対して効果的に作用し、
幅方向に満遍なく、かつガス流れ方向にダストを
遠くの方へ飛散浮遊させることができるようにな
つた。
By using a flat nozzle with a spray angle of 20 to 120 degrees in the width direction, a nozzle spray direction in the gas flow direction, and an installation angle of 0 to 15 degrees with respect to the horizontal inner wall surface, the horizontal Effectively works against dust accumulated on the inner wall surface,
It is now possible to scatter and float the dust evenly across the width and far away in the gas flow direction.
このように効果的にダストを飛散浮遊させるこ
とができるので、余裕なダストブロー用のエアー
が不必要となる。そしてガス流れ方向のノズルピ
ツチを大きく取れ、かつ幅方向のノズルピツチも
大きく取れるので、ノズル数が減少し設備費も安
価となる。 Since the dust can be effectively scattered and suspended in this way, there is no need for a large amount of dust blowing air. Since the nozzle pitch in the gas flow direction and the width direction can also be increased, the number of nozzles is reduced and equipment costs are reduced.
またフラツトノズルの吹き付けをガス流れの下
流側から上流側へ、順次吹き付け停止を繰り返す
ためのオンオフ弁を、ガス流れ方向の各段のノズ
ル毎に設け、下流側から一段づつダストブローす
ることにしたので、ダストブローする時に下流側
に堆積したダストがないために、障害物がなくな
り、ブローされるダストは遠くの方へ飛散浮遊す
ることができる。 In addition, we installed an on-off valve for each nozzle in each stage of the gas flow direction to repeat the spraying from the downstream side of the gas flow to the upstream side of the flat nozzle, and the dust was blown one stage at a time from the downstream side. Since there is no dust accumulated on the downstream side during dust blowing, there are no obstacles, and the blown dust can be scattered and floated far away.
従つて排ガス流速をダスト堆積が生じにくい20
〜30m／ｓの高速にする必要がなく、かつダスト
が冷却器内に堆積することはない。 Therefore, the exhaust gas flow rate is less likely to cause dust accumulation20
There is no need for high speeds of ~30 m/s and no dust builds up in the cooler.
本考案の実施例を以下図面に基づいて説明す
る。第１図は本考案のダストブロー装置を設けた
溶銑処理設備の全体図面であり、１は溶銑鍋、２
は集塵フード、３はガス冷却器であつて、垂直部
１０，１２と水平部１１とよりなつている。
Embodiments of the present invention will be described below based on the drawings. Figure 1 is an overall drawing of hot metal processing equipment equipped with the dust blowing device of the present invention, in which 1 is a hot metal ladle, 2 is
3 is a dust collecting hood, and 3 is a gas cooler, which consists of vertical parts 10, 12 and a horizontal part 11.
７は前記ガス冷却器水平部１１のダストが堆積
する部分１３即ちガス冷却器３内の下部側に設け
たダストブロー用ノズル、８はダストブロー用エ
アをオンオフさせるためのオンオフ弁、９はエア
配管である。４は排ガスダスト、５は排ガスブロ
ワー、６は集塵装置である。 7 is a dust blowing nozzle provided in the part 13 of the horizontal part 11 of the gas cooler where dust accumulates, that is, the lower side inside the gas cooler 3; 8 is an on/off valve for turning on and off the air for dust blowing; 9 is an air It's plumbing. 4 is exhaust gas dust, 5 is an exhaust gas blower, and 6 is a dust collector.
第２図は第１図のＡ−Ａ断面図であり、１４は
ガス冷却器３の水管、１５はその水管１４を接続
するための接続プレートである。１３は水平部内
壁面下部のダスト堆積部であつて、１週間も放置
すると中央部で約500mmのダスト堆積がある。 FIG. 2 is a sectional view taken along the line A-A in FIG. 1, and 14 is a water pipe of the gas cooler 3, and 15 is a connection plate for connecting the water pipe 14. Reference numeral 13 indicates a dust accumulation area at the lower part of the inner wall surface of the horizontal section, and if left for one week, approximately 500 mm of dust will accumulate in the central area.
７はノズルで、ダスト堆積部１３の巾方向に適
宜ピツチＰにて３本配設されている。９はエヤー
配管、８はオンオフ弁、１６は３本のノズル７の
吹付速度を均等にするためのヘツダー管である。
なおガス冷却冷却器３の内径Ｄにより巾方向のノ
ズルの数は適宜増減することができる。 Reference numeral 7 denotes nozzles, and three nozzles are arranged at appropriate pitches P in the width direction of the dust accumulation section 13. 9 is an air pipe, 8 is an on/off valve, and 16 is a header pipe for equalizing the spray speed of the three nozzles 7.
Note that the number of nozzles in the width direction can be increased or decreased as appropriate depending on the inner diameter D of the gas cooling cooler 3.
第３図はノズル７のエアー吹付角度αを示し、
巾方向に20〜120°の範囲で広がり、上下方向には
殆んど広がらないフラツトスプレイノズルを採用
している。 FIG. 3 shows the air blowing angle α of the nozzle 7,
It uses a flat spray nozzle that spreads in the range of 20 to 120 degrees in the width direction, but hardly spreads in the vertical direction.
第４図はノズル７の取付図であり、ノズル７の
エア吹付方向を排ガス流れ方向とし、ノズル取付
角度θを０〜15°とし、排ガス流れ方向における
ノズル間隔Ｌを2500mm以下としている。ノズル間
隔Ｌを2500mm以下としたのはノズル取付角度θや
エア吹付角度α、エア吹付速度等の諸条件により
異なるが、それ以上となるとダスト飛散力がなく
なるためである。 FIG. 4 is an installation diagram of the nozzle 7, in which the air blowing direction of the nozzle 7 is the exhaust gas flow direction, the nozzle installation angle θ is 0 to 15 degrees, and the nozzle spacing L in the exhaust gas flow direction is 2500 mm or less. The reason why the nozzle spacing L is set to 2500 mm or less is that the dust scattering force is lost if it is longer than this, although it varies depending on various conditions such as the nozzle mounting angle θ, the air blowing angle α, and the air blowing speed.
ノズル取付角度θを０〜15°としたのは、やや
ガス冷却器内壁面に向かつてエヤーを吹付けない
と、その内壁面にダストが残るためで、また取付
角度θを15°以上とすると、遠くの方へダストを
飛散させることができず、従つてノズル間隔Ｌを
短かくせねばならず、ノズル７を多数設ける必要
があり不経済となる。 The reason why the nozzle mounting angle θ is set to 0 to 15° is because if the air is not blown toward the inner wall of the gas cooler, dust will remain on the inner wall. , the dust cannot be scattered far away, and therefore the nozzle interval L must be shortened, and a large number of nozzles 7 must be provided, which is uneconomical.
次に本考案の作動について、第１図に基いて説
明する。エアは下流側のノズルより順次吹付け、
先ずノズル７−Ｎからエアを約５秒間吹付けて停
止する。次にノズル７−（Ｎ−１）からエアを約
５秒間吹付けて停止するこの作動を順次くりかえ
し、最上流側のノズル７−１のエアー吹付完了後
再びノズル７−Ｎに戻り、くりかえし下流側から
エアーを順次吹付けてゆく。このようにしてダス
トを順次下流側に送り込むようにしてガス冷却器
３の出側の垂直部１２にダストを落し込み、流速
の速い排ガスダスト４内でダストを撹拌し、排ガ
ス内に浮遊させて排ガスブロワー５によりその排
ガスを集塵装置６に送り込み、排ガス中のダスト
を除塵する。除塵された排ガスは集塵装置６から
大気へ放散される。 Next, the operation of the present invention will be explained based on FIG. Air is blown sequentially from the downstream nozzle,
First, air is blown from the nozzle 7-N for about 5 seconds and then stopped. Next, this operation of spraying air from nozzle 7-(N-1) for about 5 seconds and stopping is repeated in sequence, and after the air spraying from nozzle 7-1 on the most upstream side is completed, it returns to nozzle 7-N again, and is repeatedly sprayed downstream. Blow air sequentially from the side. In this way, the dust is sent downstream one by one and falls into the vertical part 12 on the outlet side of the gas cooler 3, and the dust is stirred in the exhaust gas dust 4 with a high flow rate and suspended in the exhaust gas. The exhaust gas is sent to a dust collector 6 by the exhaust gas blower 5 to remove dust from the exhaust gas. The dust-removed exhaust gas is released from the dust collector 6 into the atmosphere.
なお、各ノズル７のエア吹付時間及び各ノズル
の吹付けの時間間隔は、ダスト量、排ガス流速、
ガス冷却器の長さ等種々の条件により適宜設定す
る。 Note that the air blowing time of each nozzle 7 and the time interval between blowing of each nozzle are determined by the amount of dust, the flow rate of the exhaust gas,
Set as appropriate depending on various conditions such as the length of the gas cooler.
次に下記の条件でダストブローを実施した結
果、ダスト堆積は殆んど皆無であつた。 Next, dust blowing was carried out under the following conditions, and as a result, there was almost no dust accumulation.
（ダストブロー条件）
ガス冷却器内径（Ｄ）：3300mm
〃 水平部長さ：43000mm
排ガス平均流速：7m／ｓ
ノズル間隔（Ｌ）：1750mm
ノズル数：
25（長さ方向）×３（巾方向）＝計75個
ノズル取付角度（θ）：7.6°
ノズル巾方向ピッチ（Ｐ）：500mm
エア吹付角度（α）：90〜95°
ノズル：広角フラツトスプレイノズル
エア元圧：３Kg／cm2
エア流量：約4Nm3／min
エアー吹付方法：縦方向の25組（３ケづつ）の
ノズルを１組づつ。(Dust blow conditions) Gas cooler inner diameter (D): 3300mm Horizontal length: 43000mm Average flow velocity of exhaust gas: 7m/s Nozzle spacing (L): 1750mm Number of nozzles: 25 (length direction) x 3 (width direction) = Total of 75 pieces Nozzle installation angle (θ): 7.6° Nozzle width direction pitch (P): 500mm Air spray angle (α): 90 to 95° Nozzle: Wide-angle flat spray nozzle Air source pressure: 3Kg/cm 2 Air flow rate: Approximately 4Nm 3 /min Air blowing method: 25 sets (3 nozzles each) in the vertical direction, one set at a time.
下流側のノズルより５秒間隔で順次吹付け
る。Spray from the downstream nozzle at 5 second intervals.
本考案は下記の顕著な効果を奏する。 The present invention has the following remarkable effects.
(イ) ガス冷却器水平部の排ガス流速を、ダスト堆
積を少なくするために20〜30m／ｓ以上の高速
にする必要がないので、ガス冷却器の内径と長
さを排ガス流速に制約されることなく任意に設
定でき、限られたスペース内に設置することが
できる。(b) The exhaust gas flow velocity in the horizontal part of the gas cooler does not need to be higher than 20 to 30 m/s to reduce dust accumulation, so the inner diameter and length of the gas cooler are limited by the exhaust gas flow velocity. It can be configured arbitrarily without any hassle and can be installed within a limited space.
(ロ) 排ガス流速を１〜15m／ｓに低下させること
ができるので、排ガス量、ガス冷却器内圧力損
失を大巾に低減できる。そのため排ガスブロワ
ー、ブロワー用電動機、集塵装置等の容量を小
さくでき、設備費を低減することができる。(b) Since the exhaust gas flow velocity can be lowered to 1 to 15 m/s, the amount of exhaust gas and the pressure loss inside the gas cooler can be significantly reduced. Therefore, the capacity of the exhaust gas blower, blower electric motor, dust collector, etc. can be reduced, and equipment costs can be reduced.
(ハ) ガス冷却器内のダスト堆積部のダストを常に
飛散させ、水管をダストで覆うようなこともな
いのでガス冷却器の効率を低下させることがな
く、さらにガス冷却器出側の排ガス温度の変動
がなくなる。(c) The dust in the dust accumulation area inside the gas cooler is always scattered, and the water pipes are not covered with dust, so the efficiency of the gas cooler is not reduced, and the temperature of the exhaust gas on the outlet side of the gas cooler is lowered. fluctuations will disappear.
(ニ) 完全にダストを飛散できるので、ガス冷却器
内のダスト排出作業がなくなり、そのための操
業休止もなくなり、溶銑、溶鋼処理設備の稼動
率を向上できるとともに、ダスト排出作業費を
制限できる。(d) Since the dust can be completely scattered, there is no need to remove dust from the gas cooler, and there is no need to stop operations for this purpose, improving the operating rate of hot metal and molten steel processing equipment, and limiting the cost of removing dust.
(ホ) ガス流れ方向にダストを遠くの方へ飛散浮遊
させることができるようになつたので、ガス流
れ方向のノズルピツチを大きく取れ、かつ幅方
向のノズルピツチも大きく取れるので、ノズル
数が減少し設備費も安価となる。(e) Since it is now possible to scatter and suspend dust far away in the gas flow direction, the nozzle pitch in the gas flow direction can be increased, and the nozzle pitch in the width direction can also be increased, reducing the number of nozzles and making equipment easier. The cost is also low.
(ヘ) フラツトノズルの吹き付けをガス流れの下流
側から上流側へ、各段のノズル毎に順次吹き付
け停止を繰り返すようにしたので、各段のノズ
ルのエア量しか必要でなくなり、エア量を大幅
に少なくすることができる。(f) Since the flat nozzle sprays from the downstream side of the gas flow to the upstream side, and the spraying is stopped sequentially for each stage nozzle, only the amount of air required for each stage nozzle is required, and the air volume can be significantly reduced. It can be reduced.
第１図は本考案によるダストブロー装置を設け
た溶銑処理設備の全体図、第２図は第１図のガス
冷却器水平部のＡ−Ａ断面図、第３図は本考案の
エア吹付角度の説明図、第４図は本考案のガス冷
却器水平部の縦断面図であつてノズル配列を示す
図面、第５図は第４図のＢ−Ｂ断面図である。
３……ガス冷却器、７……ノズル、８……オン
オフ弁、１０，１２……ガス冷却器垂直部、１１
……ガス冷却器水平部、Ｌ……ノズル間隔、Ｐ…
…ノズル巾方向ピツチ、θ……ノズル取付角度、
α……エアー吹付角度、１３……ダスト堆積部。
Fig. 1 is an overall view of hot metal processing equipment equipped with a dust blowing device according to the present invention, Fig. 2 is a sectional view taken along line A-A of the horizontal section of the gas cooler in Fig. 1, and Fig. 3 is an air blowing angle according to the present invention. FIG. 4 is a longitudinal cross-sectional view of the horizontal part of the gas cooler of the present invention showing the nozzle arrangement, and FIG. 5 is a cross-sectional view taken along line B--B in FIG. 4. 3... Gas cooler, 7... Nozzle, 8... On/off valve, 10, 12... Gas cooler vertical part, 11
...Gas cooler horizontal section, L...Nozzle spacing, P...
...Nozzle width direction pitch, θ...Nozzle installation angle,
α...Air blowing angle, 13...Dust accumulation part.
Claims (1)
ス冷却器の水平内壁面に、幅方向の吹き付け角度
が20〜120度、ノズル吹き付け方向がガス流れ方
向であつて、水平内壁面に対して０〜15度の取付
け角度を有するフラツトノズルをガス流れ方向に
複数段配設し、そのフラツトノズルの吹き付けを
ガス流れの下流側から上流側へ、順次吹き付け停
止を繰り返すためのオンオフ弁を、ガス流れ方向
の各段のノズル毎に設けたことを特徴とするガス
冷却器のダストブロー装置。 The blowing angle in the width direction is 20 to 120 degrees on the horizontal inner wall of a tube-shaped gas cooler that cools high-temperature gas containing dust, and the nozzle blowing direction is in the gas flow direction and 0 with respect to the horizontal inner wall. Flat nozzles with installation angles of ~15 degrees are arranged in multiple stages in the gas flow direction, and on-off valves are installed in the gas flow direction to repeat the spraying from the downstream side to the upstream side of the gas flow and to repeat the spraying stop sequentially. A dust blowing device for a gas cooler characterized by being provided for each nozzle in each stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987106395U JPH0445036Y2 (en) | 1987-07-13 | 1987-07-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987106395U JPH0445036Y2 (en) | 1987-07-13 | 1987-07-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6413500U JPS6413500U (en) | 1989-01-24 |
| JPH0445036Y2 true JPH0445036Y2 (en) | 1992-10-22 |
Family
ID=31339866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987106395U Expired JPH0445036Y2 (en) | 1987-07-13 | 1987-07-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0445036Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671946A (en) * | 2019-10-30 | 2020-01-10 | 马鞍山钢铁股份有限公司 | Anti-blocking structure and anti-blocking method of rotary hearth furnace flue gas waste heat utilization system |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2530739Y2 (en) * | 1990-11-14 | 1997-03-26 | 大同特殊鋼株式会社 | Dust accumulation prevention device for exhaust duct |
| JP2727394B2 (en) * | 1993-04-05 | 1998-03-11 | 川崎重工業株式会社 | Pipe cleaning system for wet dust collector of converter exhaust gas treatment equipment |
| JP4012818B2 (en) * | 2000-08-08 | 2007-11-21 | 株式会社荏原製作所 | Method for removing solid product adhered to exhaust gas pipe and exhaust gas treatment system |
| JP5106967B2 (en) * | 2007-09-28 | 2012-12-26 | 三菱重工業株式会社 | Combustion ash accumulation prevention device and duct equipped with the same |
| JP6123698B2 (en) * | 2014-02-19 | 2017-05-10 | Ｊｆｅスチール株式会社 | Method for preventing dust accumulation in exhaust duct of sintering machine |
| JP7092098B2 (en) * | 2019-09-02 | 2022-06-28 | Ｊｆｅスチール株式会社 | Saturator of converter exhaust gas treatment equipment and cooling dust removal method of converter exhaust gas using it |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5516830U (en) * | 1978-07-20 | 1980-02-02 |
-
1987
- 1987-07-13 JP JP1987106395U patent/JPH0445036Y2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671946A (en) * | 2019-10-30 | 2020-01-10 | 马鞍山钢铁股份有限公司 | Anti-blocking structure and anti-blocking method of rotary hearth furnace flue gas waste heat utilization system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6413500U (en) | 1989-01-24 |
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