JP2967319B2 - Operating method of moving bed - Google Patents
Operating method of moving bedInfo
- Publication number
- JP2967319B2 JP2967319B2 JP9652593A JP9652593A JP2967319B2 JP 2967319 B2 JP2967319 B2 JP 2967319B2 JP 9652593 A JP9652593 A JP 9652593A JP 9652593 A JP9652593 A JP 9652593A JP 2967319 B2 JP2967319 B2 JP 2967319B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- dust
- moving bed
- blast furnace
- dust removal
- 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 - Lifetime
Links
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鉄鋼業及び非鉄金属精
錬業の焼結炉および高炉から排出されるガスの浄化処理
に最適な移動層の操業方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for operating a moving bed which is most suitable for purifying gas discharged from sintering furnaces and blast furnaces in the steel industry and non-ferrous metal refining industry.
【０００２】[0002]
【従来の技術】焼結炉，高炉から発生するガスには高い
濃度の煤塵が含まれており、焼結炉排ガスは煤塵を除去
した後に排出あるいは、脱硫や脱硝処理し大気中に排出
している。高炉ガスの場合は除塵処理をした後に燃料用
ガスとして利用している。これらのガスを除塵処理する
設備として電気集塵機やバグフィルターやベンチュリー
スクラバーなどの除塵設備が設置されている。また、移
動層による除塵設備（例えば、特開昭５３−１３６７６
９号公報）が知られている。2. Description of the Related Art Gases generated from a sintering furnace and a blast furnace contain a high concentration of dust, and the exhaust gas of the sintering furnace is discharged after removing the dust, or discharged into the atmosphere by desulfurization or denitration. I have. Blast furnace gas is used as fuel gas after dust removal. As equipment for removing dust from these gases, dust collectors such as an electric dust collector, a bag filter, and a venturi scrubber are installed. Further, a dust removal facility using a moving bed (for example, Japanese Patent Application Laid-Open No.
No. 9) is known.
【０００３】[0003]
【発明が解決しようとする課題】しかし、電気集塵機や
バグフィルター除塵設備は、排ガスの温度、湿度、煤塵
の粒子径そして見かけ電気抵抗率などの特性により、高
除塵率且つ安定的に運転できる範囲は小さい。特に、煤
塵中のアルカリ微粒子を高除塵率で且つ安定的な運転状
況で除塵することは極めて困難である。また、高炉ガス
の除塵に用いられているベンチュリースクラバーは高効
率で且つ安定的に運転できる優れた除塵設備であるが、
圧力損失が大きくガス温度低下が大きいので、高炉ガス
でタービンを回転させ発電する設備を有する系において
は経済的に不利である。However, the electric dust collector and the bag filter dust removing equipment have a high dust removing rate and a stable operating range due to characteristics such as exhaust gas temperature, humidity, dust particle size and apparent electric resistivity. Is small. In particular, it is extremely difficult to remove the alkaline fine particles in the dust at a high dust removal rate and in a stable operation condition. In addition, the venturi scrubber used for dust removal of blast furnace gas is an excellent dust removal equipment that can operate stably with high efficiency.
Since the pressure loss is large and the gas temperature drop is large, it is economically disadvantageous in a system having a facility for rotating a turbine with blast furnace gas to generate power.
【０００４】従来の移動層は、充填層内を移動し排出さ
れる充填物は多量の煤塵が付着しているので、再度使用
することはできない。従って、投棄するか、再使用する
ためには付着粉を完全に除去する必要がある。本発明の
対象とするガス中の煤塵の内微粒子のものは付着性があ
り、完全に除去する設備は多大な費用を要する。[0004] In the conventional moving bed, the packing discharged after moving in the packed bed has a large amount of dust attached thereto and cannot be reused. Therefore, it is necessary to completely remove the adhered powder in order to discard or reuse. The particulate matter in the dust in the gas targeted by the present invention has an adhesive property, and equipment for completely removing the dust requires a large cost.
【０００５】本発明の目的は、焼結炉及び高炉から発生
するガスを高効率で安定的に除塵できる移動層の操業方
法を提供することである。An object of the present invention is to provide a method for operating a moving bed capable of stably removing gas generated from a sintering furnace and a blast furnace with high efficiency.
【０００６】[0006]
【課題を解決するための手段】本発明の要旨は、入り口
から焼結炉排ガスあるいは高炉発生ガスを導入して、１
ｍｍ以上，１０ｍｍ以下の粒度範囲に整粒した焼結鉱を
充填物とした充填層にガスを通過させ、出口から清浄ガ
スを排出することを特徴とする移動層の操業方法にあ
る。SUMMARY OF THE INVENTION The gist of the present invention is to introduce a sintering furnace exhaust gas or a blast furnace generated gas from an entrance, and
A method for operating a moving bed, characterized in that a gas is passed through a packed bed containing sintered ore sized to a particle size range of not less than 10 mm and not more than 10 mm, and a clean gas is discharged from an outlet.
【０００７】[0007]
【作用】図１、及び図２を用いて本発明の作用及び実施
例を説明する。The operation and embodiment of the present invention will be described with reference to FIGS.
【０００８】[0008]
【実施例】図２は移動層の説明図である。煤塵を含むガ
スはガス入り口８から導入され、充填層２を通過し除塵
され、ガス出口５に排出される。３はルーバー、４は金
網である。一方、充填物はバルブ１より充填層２に装入
され、充填層内を上方から下方に向かい降下する。充填
物の降下速度は充填物の切出装置６の運転を制御するこ
とにより制御される。切り出された充填物はバルブ７か
ら系外に排出される。FIG. 2 is an explanatory view of a moving layer. The gas containing dust is introduced from the gas inlet 8, passes through the packed bed 2, is dust-removed, and is discharged to the gas outlet 5. 3 is a louver and 4 is a wire mesh. On the other hand, the filling material is charged into the filling layer 2 from the valve 1 and descends from above in the filling layer downward. The speed at which the filling material descends is controlled by controlling the operation of the filling material cutting device 6. The cut filler is discharged from the valve 7 to the outside of the system.
【０００９】図１は充填層の充填物質として、焼結鉱、
豪州産鉄鉱石，砂を使用し除塵特性を調査した実施例で
ある。対象したガスは焼結面積５００ｍ2 の焼結機から
の排ガスである。層厚は１００ｍｍ，粒子径は目開き３
ｍｍと５ｍｍの篩で篩分て調製した。焼結鉱は鉄鉱石，
砂に比較して高い除塵率を示すとともに、鉄鉱石及び砂
に比べ多くの煤塵を流入させても除塵率は低下しない。
この様に優れた特性を示す原因は、焼結鉱は多孔質物質
でかつ単位堆積あたりの表面積が大きいためである。FIG. 1 shows a sinter,
This is an example of investigating dust removal characteristics using Australian iron ore and sand. The target gas is exhaust gas from a sintering machine having a sintering area of 500 m 2 . Layer thickness 100 mm, particle size 3
mm and 5 mm sieve. Sinter is iron ore,
The dust removal rate is higher than that of sand, and the dust removal rate does not decrease even if more dust is introduced than iron ore and sand.
The reason why such excellent properties are exhibited is that the sintered ore is a porous substance and has a large surface area per unit deposition.
【００１０】充填層による除塵は、充填物層の空間を流
れるガス中の煤塵が充填物粒子に衝突し充填物粒子の表
面に付着，担持されることによりガスから除去される。
除去の効率は充填物の数１ 式（Ｉ）により決定され
る。In the dust removal by the packed bed, dust in the gas flowing in the space of the packed bed collides with the packed particles and is attached to and carried on the surface of the packed particles, and is removed from the gas.
The efficiency of the removal is determined by equation (1) of the packing.
【００１１】[0011]
【数１】 Ｅ：除塵率 ε：充填物粒子の間の空隙の割合、即ち空隙率 Ｌ：充填層の厚さ（ｍ） Ｄ：充填物の粒子の直径（ｍ） η：集塵効率(Equation 1) E: Dust removal rate ε: Ratio of voids between filler particles, that is, porosity L: Thickness of packed layer (m) D: Diameter of packed particles (m) η: Dust collection efficiency
【００１２】集塵効率は充填物の形状、特に単位体積あ
たりの表面積に大きく依存する。The dust collection efficiency largely depends on the shape of the packing, particularly on the surface area per unit volume.
【００１３】表１は鉄鋼業で高炉原料として使用してい
る焼結鉱の閉じていない気孔の割合、開気孔率を特開平
３−５４８０号公報の方法により測定した値を示す。測
定によれば、焼結鉱の開気孔率は４４％から５３％あ
る。即ち、多孔質物質である。本発明で使用する焼結鉱
は多孔質物質である焼結鉱を整粒・篩分して調製するの
で、煤塵粒子径以下の凹凸を除いた凹凸が大きい。従っ
て、煤塵粒径以上の寸法で見た場合において滑らかな表
面を持つ粒子に比べ表面積は非常に大きい。即ち、式
（Ｉ）中のηが大きいことを意味しており、高い除塵率
が得られる。尚、本発明の対象とするガスに含まれる煤
塵粒子径は１ミクロン（μ）から２００ミクロン（μ）
の範囲に９９％以上含まれる。また、多孔質で表面の曲
率半径が１ミクロン（μ）以上の凹凸の大きい焼結鉱は
ガスから捕集した煤塵がガス流により飛散しにくいので
多くの煤塵を捕集しておくことが可能である。Table 1 shows the values of the percentage of open pores and the open porosity of the sintered ore used as a raw material for the blast furnace in the steel industry measured by the method disclosed in JP-A-3-5480. According to measurements, the open porosity of the sintered ore is between 44% and 53%. That is, it is a porous substance. Since the sinter used in the present invention is prepared by sizing and sieving the sinter which is a porous substance, the sinter has large irregularities except irregularities smaller than the dust particle diameter. Therefore, the surface area is much larger than that of particles having a smooth surface when viewed in a size larger than the dust particle size. That is, it means that η in the formula (I) is large, and a high dust removal rate can be obtained. The particle size of the dust contained in the gas of the present invention is from 1 micron (μ) to 200 microns (μ).
Is included in the range of 99% or more. In addition, it is possible to collect a large amount of dust because the dust collected from the gas is difficult to be scattered by the gas flow in the porous ore with large unevenness whose surface radius of curvature is 1 micron (μ) or more. It is.
【００１４】[0014]
【表１】 [Table 1]
【００１５】移動層に充填する焼結鉱の粒子の直径を１
ｍｍ以上としなければならない理由は、１ｍｍ未満の粒
子径の粉が層内に混入すると、移動層内をガスが通過す
る時の圧力損失が極めて大きくなり、多量のガスを処理
する工業設備としては不適であるとともに、混入した粉
がガス流で飛散し出口ガスの煤塵濃度が上昇するためで
ある。The diameter of the sintered ore particles to be filled in the moving bed is 1
The reason for having to be not less than 1 mm is that if powder having a particle diameter of less than 1 mm is mixed in the bed, the pressure loss when the gas passes through the moving bed becomes extremely large, and as industrial equipment for processing a large amount of gas, This is because it is inappropriate and the mixed powder is scattered in the gas flow, so that the dust concentration of the outlet gas increases.
【００１６】焼結鉱の除塵用移動層の充填物としてのも
う一つの優位性は、除塵に供したのちに焼結原料として
そのまま使用できる点にある。即ち、処理設備あるい
は、投棄場所を必要としない点が優れている。Another advantage of the sinter as a filler for the dust removal moving bed is that it can be used as a sintering raw material after dust removal. That is, it is excellent in that it does not require a processing facility or a dumping place.
【００１７】移動層に充填する焼結鉱の粒子の直径を１
０ｍｍ以下としなければならない理由は、１０ｍｍ超で
は除塵能力が不十分であるとともに、１０ｍｍ超の焼結
原料は歩留りの低下を引き起こし焼結原料としては不適
であるためである。尚、１０ｍｍ超の焼結鉱は高炉原料
として使用可能であるが、煤塵が多量に付着しているの
で高炉原料として使用するためには付着した煤塵を除去
することが必要であるので、付着粉除去設備が必要であ
る。従って、焼結鉱使用の優位性が失われる。The diameter of the sintered ore particles to be filled in the moving bed is 1
The reason why the thickness must be 0 mm or less is that if it exceeds 10 mm, the dust removing ability is insufficient, and the sintering raw material exceeding 10 mm causes a decrease in yield and is unsuitable as a sintering raw material. Sinter ore with a diameter of more than 10 mm can be used as a blast furnace raw material. However, since a large amount of dust adheres to the blast furnace, it is necessary to remove the attached dust to use as a blast furnace raw material. Removal equipment is required. Therefore, the advantage of using sinter is lost.
【００１８】[0018]
【発明の効果】本発明によれば、高濃度の煤塵を含む焼
結炉及び高炉から発生するガスを高除塵率かつ安定的な
除塵処理が可能である。According to the present invention, it is possible to perform a high dust removal rate and a stable dust removal treatment on the gas generated from the sintering furnace and the blast furnace containing high concentration of dust.
【図１】本発明の実施例であって、移動層の除塵能力測
定例である。FIG. 1 is an example of the present invention, which is an example of measuring the dust removal ability of a moving bed.
【図２】移動層の説明図である。FIG. 2 is an explanatory diagram of a moving layer.
１ バルブ ２ 充填層 ３ ルーバー ４ 金網 ５ ガス出口 ６ 充填物の切出装置 ７ バルブ ８ ガス入り口 DESCRIPTION OF SYMBOLS 1 Valve 2 Packing layer 3 Louver 4 Wire mesh 5 Gas outlet 6 Filling out device 7 Valve 8 Gas inlet
フロントページの続き (72)発明者 吉武 智郎 福岡県北九州市戸畑区大字中原46−59 新日本製鐵株式会社 機械・プラント事 業部内 (56)参考文献 特開 昭57−204214（ＪＰ，Ａ) 特開 昭58−219（ＪＰ，Ａ) 特開 昭58−119318（ＪＰ，Ａ) 特開 昭60−153917（ＪＰ，Ａ) 特開 平５−212233（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) F27D 17/00 104 B01D 46/00 - 46/38 Continuation of the front page (72) Inventor Tomohiro Yoshitake 46-59 Ohara Nakahara, Tobata-ku, Kitakyushu-shi, Fukuoka Nippon Steel Corporation Machinery & Plant Division (56) References JP-A-57-204214 (JP, A) JP-A-58-219 (JP, A) JP-A-58-119318 (JP, A) JP-A-60-153917 (JP, A) JP-A-5-212233 (JP, A) (58) Fields investigated (Int.Cl. 6 , DB name) F27D 17/00 104 B01D 46/00-46/38
Claims (1)
生ガスを導入して、１ｍｍ以上，１０ｍｍ以下の粒度範
囲に整粒した焼結鉱を充填物とした充填層にガスを通過
させ、出口から清浄ガスを排出することを特徴とする移
動層の操業方法。1. A sintering furnace exhaust gas or a blast furnace generated gas is introduced from an inlet, a gas is passed through a packed bed of sintered ore packed in a particle size range of 1 mm or more and 10 mm or less, and the gas is passed through an outlet. A method for operating a moving bed characterized by discharging clean gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9652593A JP2967319B2 (en) | 1993-04-01 | 1993-04-01 | Operating method of moving bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9652593A JP2967319B2 (en) | 1993-04-01 | 1993-04-01 | Operating method of moving bed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06288686A JPH06288686A (en) | 1994-10-18 |
| JP2967319B2 true JP2967319B2 (en) | 1999-10-25 |
Family
ID=14167561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9652593A Expired - Lifetime JP2967319B2 (en) | 1993-04-01 | 1993-04-01 | Operating method of moving bed |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2967319B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990001668A (en) * | 1997-06-17 | 1999-01-15 | 윤종용 | Electromagnetic Shielding Semiconductor Package |
-
1993
- 1993-04-01 JP JP9652593A patent/JP2967319B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06288686A (en) | 1994-10-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
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