JPH03180414A - Apparatus for circulating fluidized bed - Google Patents
Apparatus for circulating fluidized bedInfo
- Publication number
- JPH03180414A JPH03180414A JP31887089A JP31887089A JPH03180414A JP H03180414 A JPH03180414 A JP H03180414A JP 31887089 A JP31887089 A JP 31887089A JP 31887089 A JP31887089 A JP 31887089A JP H03180414 A JPH03180414 A JP H03180414A
- Authority
- JP
- Japan
- Prior art keywords
- ore
- fluidized bed
- riser
- powdery
- collecting
- 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
- 239000000919 ceramic Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000011001 backwashing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- BMWMWYBEJWFCJI-UHFFFAOYSA-K iron(3+);trioxido(oxo)-$l^{5}-arsane Chemical compound [Fe+3].[O-][As]([O-])([O-])=O BMWMWYBEJWFCJI-UHFFFAOYSA-K 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Manufacture Of Iron (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上のｆ１１用分野）
本発明は流動層からガスに同伴して排出される粉状鉱石
の捕集効率を高めた循ｒｒＪ流動層装置に関する７
［従米の技術」
Ｌ年、酸ｆヒ鉄又は各種金属酸化物を含有する鉱石原料
は、塊状鉱石が減少して粉状ちし、くは粒状の鉱石が多
くなっており、その傾向は今後ますますｖ４著になると
予想される。Detailed Description of the Invention [Industrial F11 Field] The present invention relates to a circulating rrJ fluidized bed device that improves the efficiency of collecting powdery ore discharged from a fluidized bed along with gas. ” In 2015, ore raw materials containing iron arsenate or various metal oxides have decreased in lumpy ores and have become more powdery or granular ores, and this trend will continue to increase in the future. It is expected that
二のような現状にかんがみ、粉粒状鉱石を直接製錬する
技術が発展してきた１例えば、流動層予備還元炉と竪型
ｌ容融層元炉との結合に係る装置を用い、粉粒状鉱石か
らぽ接旧融金属を５８１造する方法がそれである。この
方法は、金属酸化物含有鉱石の予備還元に必要な還元剤
及び熱の供給源として、溶融還元炉の高温排ガスをＩＩ
Ｉ用して流動層形式により予備還元する方法である。二
の方法によれば、粉粒状鉱石を塊成化することなく直接
原料として使用することかできるので低コストで旧融合
属を１８！遣することが可能である。In view of the current situation described in 2, technology has been developed to directly smelt granular ore. This is the method of making 581 blank welded metals. This method uses high-temperature exhaust gas from a smelting reduction furnace as a source of reducing agent and heat necessary for preliminary reduction of metal oxide-containing ores.
This is a method of preliminary reduction in a fluidized bed format. According to the second method, it is possible to directly use the powdery ore as a raw material without agglomerating it, so it is possible to reduce the cost of the old amalgamated ore. It is possible to send
流動層を用いた扮粒状鉱石子ｍｌ１ｉ元炉としては流動
炉の出口にサイクロンを設け、サイクロンでｒｌｌ集し
た粉状鉱石を流動層へ層流するｔＭ環流動層装置が用い
られる。As a former furnace for granular ore using a fluidized bed, a tM circulating fluidized bed apparatus is used, in which a cyclone is provided at the outlet of the fluidized furnace and the powdered ore collected by the cyclone is laminarly flowed into the fluidized bed.
このような循環流動層装置は粉状鉱石を流動化予備ぷ元
するライザ、ライザからガスに同伴されて排出した粉状
鉱石の捕集装置、捕集鉱石を貯溜するダウンカマ、及び
ダウンカマからライザへの鉱石循環装置からなる外部循
環型の循環流動層装置が普通である。Such a circulating fluidized bed device includes a riser that fluidizes and pre-pulls powdery ore, a collection device for the powdery ore discharged along with gas from the riser, a downcomer that stores the collected ore, and a transfer from the downcomer to the riser. External circulation type circulating fluidized bed equipment consisting of ore circulation equipment is common.
［発明が解決しようとする課題］
このような循環流動層装置では、従来、流動層から排ガ
スと共に排出された粉状鉱石をサイクロンで捕集してい
た。従来の１段または多段のサイクロンでは、捕集効率
が低く１例えば流動層に新たに供給する供給鉱石６００
ｋｇ／Ｈに対してサイクロンから気流と共に排出される
粉体が３００ｋ ｇ／Ｈにも及ぶことがある。[Problems to be Solved by the Invention] Conventionally, in such a circulating fluidized bed apparatus, powdery ore discharged from the fluidized bed together with exhaust gas has been collected using a cyclone. Conventional one-stage or multi-stage cyclones have low collection efficiency.
kg/h, the amount of powder discharged from the cyclone along with the airflow can reach up to 300 kg/h.
本発明は、従来の捕集装置であるサイクロンに代り、気
流中の鉱石の捕集効率が高く、簡易で長寿命の構造をも
つ鉱石捕集装置を備えた循環流動層装置を提供すること
を目的とする。The present invention aims to provide a circulating fluidized bed device equipped with an ore collection device that has high efficiency in collecting ore in an air stream, and has a simple and long-life structure in place of a cyclone, which is a conventional collection device. purpose.
〔課題を解決するための手段１
本発明は上述のような外部循■１をの１盾環流動装置に
おいて、ライザからガスに同伴されてｎ１出した粉状鉱
石の捕集′Ａ置を多孔質フィルタチューブとしたことを
特徴とする循環流動層装置である。[Means for Solving the Problems 1] The present invention is based on the above-mentioned external circulation system (1) in which the collection of powdery ore ejected from the riser by the gas is carried out using a porous-hole system. This is a circulating fluidized bed device characterized by using a quality filter tube.
前記多孔質フィルタチューブの材實をセラミックス製と
すれは、耐久性、高７ｓ ＩＩＩ摩性にすぐれ極めて好
ましい。It is extremely preferable that the material of the porous filter tube is made of ceramics since it has excellent durability and high 7S III friction.
「作用１
本発明では、上記のようにライザ出口直後に多孔質フィ
ルタチューブ群をａける。ライザから排ガスと共に排出
した粉状鉱石は多孔質フィルタによって捕集され、この
フィルタを通って濾過された漬汁なガスが粉状鉱石捕集
装置から系外へ排出される。捕集された粉状鉱石はダウ
ンカマへ回収される。Effect 1 In the present invention, as described above, a group of porous filter tubes is provided immediately after the riser outlet. Powdered ore discharged from the riser together with the exhaust gas is collected by the porous filter and filtered through this filter. The succulent gas is discharged from the powder ore collection device to the outside of the system.The collected powder ore is collected into the downcomer.
多（Ｌ’ｌＥフィルタチューブ詳はＮ Ｒのブロックに
分け、各ブロックごとにフィルタ表面のｌ＝を青物を交
互に逆洗することによって払い落とす。これにより目詰
まりを起すことｔｌ＜、高い捕集効率を保持し、回収し
た粉状鉱石のライザへの１盾環を可能とする。The L'lE filter tube is divided into N R blocks, and in each block, the l = on the filter surface is removed by backwashing the filter alternately with green matter. It maintains the collection efficiency and enables one shield ring of collected powdered ore to the riser.
【実施例ｊ
第１図に本発明の実施料装置を示した。第２図はそのＩ
Ｉ −Ｉ＋天視図である７ライザｌには粉状鉱石２を供
給し、下端から流動化層元ガス３を供給し、ライザｌ内
の粉状鉱石を流動化して流動層４を形成し、還元する。[Example j] Fig. 1 shows a working device of the present invention. Figure 2 is I
Powdered ore 2 is supplied to riser l, and fluidized bed source gas 3 is supplied from the lower end to fluidize the powdered ore in riser l to form fluidized bed 4. , give back.
還元ガス３はライザｌの排出ガス管５を通って粉状鉱石
捕集装置６に入り粉状鉱石を分離して排出管７から糸外
に排出される。The reducing gas 3 passes through the exhaust gas pipe 5 of the riser 1, enters the powdered ore collection device 6, separates the powdered ore, and is discharged from the discharge pipe 7 to the outside of the yarn.
粉状鉱石捕集装置６は内部に多数のセラミックスチュー
ブフィルタ１０を内蔵し、上述のガスはこのフィルタｌ
Ｏを内径から外径へ通って濾過され、粉状鉱石ｌｌをそ
の表面に付着させる。このフィルタｌＯには図示省略し
た逆洗ノズルが配設されており、還元ガスの連通方向に
逆向に逆洗ガスを噴出する。逆洗によりフィルタｌＯの
面からｉｌ＋離した粉状鉱石は粉状鉱石ｆｌＩ集装蓋装
置底部１２に落下し、ダウンカマ１３を経てライザｌ内
の流動層４に還点される。The powdery ore collection device 6 has a large number of ceramic tube filters 10 built therein, and the above-mentioned gas is passed through the filters l.
O is filtered from the inner diameter to the outer diameter, depositing the powdered ore on its surface. A backwash nozzle (not shown) is disposed in the filter IO, and the backwash gas is ejected in a direction opposite to the direction of communication of the reducing gas. The powdered ore separated by il+ from the surface of the filter 1O by backwashing falls onto the bottom 12 of the powdered ore flI collection lid device, passes through the downcomer 13, and returns to the fluidized bed 4 in the riser 1.
広に、本発明の実廁例！装置を用いた操業についで説明
する。A practical example of the invention! Next, the operation using the device will be explained.
ライザ 内径ニア００ｍｍ
高さ＋７３００ｍｍ
鉱石 粒径：６０〜７０ＬＬｍ
（調和平均径）
１盾環鉱石看 ： ｌ Ｏ〜２０ｔ、／Ｈ還元ガス
量 ： ３００ＯＮ耐／１］
多孔實フイルタチユーブ
外径：２００ｍｍφ
長さ＋２０００ｍｍ
本数 ２５本×２系列
の条件下で操業した結果、 ｎｓｔ集装置から排出する
ガス中の固形分は、４７ｇ／Ｎｍ’であった。これは従
来の直径６００ｍｍφの２居直９１１サイクロン方式で
は３５ｋｇ／Ｎｒｎ’であったのに比し激減した値とな
っている。Riser Inner diameter near 00mm Height +7300mm Ore particle size: 60~70LLm (harmonic mean diameter) 1 shield ring ore size: l O~20t, /H reducing gas amount: 300ON resistance/1] Porous filter tube outer diameter: 200mmφ Length As a result of operation under the condition of 2 series of 25 pipes with a length of +2000 mm, the solid content in the gas discharged from the NST collector was 47 g/Nm'. This is a drastically reduced value compared to 35 kg/Nrn' in the conventional two-in-line 911 cyclone system with a diameter of 600 mm.
［発明の効果Ｊ
本発明によれば、粉状鉱石を予備還元する外部循環型輪
■１流動層装置において、従来実大な遣の粉状鉱石が排
出されていたのが、極めて少なくなり、原料原単位、熱
原単位、ガス使用量が激減し、従来に比し著しい高能率
生産を行うことが可能になった。[Effect of the Invention J According to the present invention, in an external circulation type one fluidized bed device for pre-reducing powdery ore, the amount of powdery ore that was previously discharged is extremely reduced. The raw material consumption rate, heat consumption rate, and gas consumption have been drastically reduced, making it possible to perform production with significantly higher efficiency than before.
第１図は本発明の実施例の縦断面図、第２図はその■−
■矢視図である。
ｌ・・・ライザ ２・・・粉状鉱石３・・・流
動化還元ガス ４−・・流動層５・・・排出ガス管
６・・−粉状鉱石捕集装置７・・・排出管
１０・・・フィルタ１１・・・粉状鉱石 １２−・
・底部１３・・・ダウンカマFig. 1 is a longitudinal sectional view of an embodiment of the present invention, and Fig. 2 is its ■-
■It is an arrow view. l...Riser 2...Powdered ore 3...Fluidized reducing gas 4-...Fluidized bed 5...Exhaust gas pipe
6...-Powdered ore collection device 7...Discharge pipe
10... Filter 11... Powdered ore 12-.
・Bottom part 13...down comer
Claims (1)
らガスに同伴されて排出する粉状鉱石の捕集装置、捕集
鉱石を貯溜するダウンカマ、及びダウンカマからライザ
への鉱石循環装置からなる外部循環型の循環流動層装置
において、 ライザから排出される粉状鉱石の捕集装置 を多孔質フィルタチューブを備えた装置としたことを特
徴とする循環流動層装置。 ２ 多孔質フィルタチューブがセラミックフィルタであ
ることを特徴とする請求項１記載の循環流動層装置。[Scope of Claims] 1. A riser for fluidizing and pre-reducing powdery ore, a collection device for the powdery ore which is discharged from the riser along with gas, a downcomer for storing the collected ore, and a flow from the downcomer to the riser. A circulating fluidized bed device of an external circulation type consisting of an ore circulation device, characterized in that a device for collecting powdery ore discharged from a riser is a device equipped with a porous filter tube. 2. The circulating fluidized bed apparatus according to claim 1, wherein the porous filter tube is a ceramic filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31887089A JPH03180414A (en) | 1989-12-11 | 1989-12-11 | Apparatus for circulating fluidized bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31887089A JPH03180414A (en) | 1989-12-11 | 1989-12-11 | Apparatus for circulating fluidized bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03180414A true JPH03180414A (en) | 1991-08-06 |
Family
ID=18103887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31887089A Pending JPH03180414A (en) | 1989-12-11 | 1989-12-11 | Apparatus for circulating fluidized bed |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03180414A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01247522A (en) * | 1988-03-30 | 1989-10-03 | Nippon Steel Corp | Apparatus for recovering reduced iron powder in iron ore pre-reducing apparatus |
-
1989
- 1989-12-11 JP JP31887089A patent/JPH03180414A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01247522A (en) * | 1988-03-30 | 1989-10-03 | Nippon Steel Corp | Apparatus for recovering reduced iron powder in iron ore pre-reducing apparatus |
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