JPH06126115A - Method for dust collection in sintered ore manufacturing facilities - Google Patents
Method for dust collection in sintered ore manufacturing facilitiesInfo
- Publication number
- JPH06126115A JPH06126115A JP4301826A JP30182692A JPH06126115A JP H06126115 A JPH06126115 A JP H06126115A JP 4301826 A JP4301826 A JP 4301826A JP 30182692 A JP30182692 A JP 30182692A JP H06126115 A JPH06126115 A JP H06126115A
- Authority
- JP
- Japan
- Prior art keywords
- dust
- exhaust gas
- sintering machine
- gas
- main exhaust
- 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
- 239000000428 dust Substances 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000005245 sintering Methods 0.000 claims abstract description 46
- 239000004744 fabric Substances 0.000 claims description 10
- 239000000779 smoke Substances 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 65
- 239000011362 coarse particle Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 239000012717 electrostatic precipitator Substances 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 238000004040 coloring Methods 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000012716 precipitator Substances 0.000 description 2
- 238000010278 pulse charging Methods 0.000 description 2
- 239000012719 wet electrostatic precipitator Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012718 dry electrostatic precipitator Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、焼結鉱製造設備の焼
結機主排風ガスのバグフィルターでの集塵を可能とした
焼結鉱製造設備の集塵方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for collecting dust in a sinter production facility, which enables dust collection by a bag filter of main exhaust gas from a sintering machine in the sinter production facility.
【０００２】[0002]
【従来の技術】近年、環境問題に対する市民の要求レベ
ルは高まってきており、事業者もこれに応えるべく努力
すると共に、“クリーンな企業”のイメージ作りに力を
注いでいる。一方、製鉄所において粉鉱石を高炉原料と
して適正な大きさに焼結する焼結鉱製造設備の焼結機と
しては、連続移動格子下方吸引方式のいわゆるドワイト
ロイド式焼結機が多く用いられている。このドワイトロ
イド式焼結機は、連続移動格子であるパレット上に焼結
原料を積層供給して点火し、パレットの下端に沿って配
設された多数のウインドボックスを通じて排風支管およ
び主排風機により下方に向けて強制吸気を行い、排鉱部
に至る間に焼成を完了させる。上記焼結鉱製造設備の排
ガスの煙突は、通常高さ１００ｍ以上と製鉄所内でも最
も高いものの一つで、遠くからでもよく目立つため、こ
の煙突から着色した煙を出すことは、著しく前記“クリ
ーンな企業”のイメージを損なうこととなる。2. Description of the Related Art In recent years, the level of citizens' demand for environmental problems has been increasing, and businesses are striving to meet them, and at the same time, they are focusing on creating an image of a "clean company". On the other hand, the so-called Dwightroid type sintering machine of the continuous moving grid downward suction method is often used as the sintering machine of the sinter ore manufacturing equipment that sinters powdered ore to an appropriate size as a blast furnace raw material in an iron mill. There is. This Dwightroid type sintering machine stacks and feeds sintering raw materials onto a pallet, which is a continuous moving grid, and ignites them, and through a number of windboxes arranged along the lower end of the pallet, an exhaust duct and a main exhauster. By this, forced intake is performed downward, and firing is completed while reaching the mine ore. The exhaust gas chimney of the above-mentioned sinter production facility is usually one of the tallest in the steelworks, with a height of 100 m or more, and it is conspicuous even from a distance. The image of a "good company" is spoiled.
【０００３】焼結鉱製造設備の排ガスは、通常焼結機主
排風ガスと焼結鉱製品搬送ラインの含塵ガスとがある。
焼結機主排風ガスの処理方法としては、従来乾式電気集
塵機またはサイクロン集塵機に導いて除塵するのが一般
的であった。しかしながら、焼結機主排風ガスは、ガス
流量が非常に大きく、水分が８〜１０％と多く、ガス中
のダスト濃度が通常０．５〜１．５ｇ／Ｎｍ3と高いう
えダストの電気抵抗が大きく、さらにダスト粒子径が１
ｍｍ程度の粗大なものから、１μｍ以下の極微細なもの
まで含有している。このため、焼結機主排風ガスは、乾
式電気集塵機またはサイクロン集塵機に導いて除塵して
も、乾式電気集塵機ではダストの電気抵抗が高い等の理
由により平均除塵率は約９０〜９５％、またサイクロン
集塵機では７０〜８０％程度で、着色が十分に解消され
るまでには至らない。Exhaust gas from the sinter ore production facility is usually slag gas from the main sinter machine and dust-containing gas from the sinter ore product conveying line.
As a method for treating the main exhaust gas from the sintering machine, it has been customary in the past to introduce dust to a dry electric dust collector or a cyclone dust collector. However, the main exhaust gas from the sintering machine has a very large gas flow rate, a high water content of 8 to 10%, a high dust concentration in the gas of 0.5 to 1.5 g / Nm 3, and a high dust electricity. High resistance, dust particle size is 1
It contains from coarse particles of about mm to ultrafine particles of 1 μm or less. Therefore, even if the main exhaust gas from the sintering machine is guided to a dry type electrostatic precipitator or a cyclone dust collector to remove dust, the average dust removal rate is about 90 to 95% because of the high electric resistance of dust in the dry type electrostatic precipitator. In the case of a cyclone dust collector, it is about 70 to 80%, and coloring cannot be sufficiently eliminated.
【０００４】このため、前記焼結機主排風ガスの着色を
解消するため、パルス荷電を採用する等により乾式電気
集塵機の効率向上を図る方法、あるいは排煙脱硫設備等
を集塵機の前段に設置することにより湿式電気集塵機の
適用を可能にする方法が検討されてきた。しかしなが
ら、通常焼結機主排風ガスの着色煙を解消するために
は、ダスト濃度を概ね１０ｍｇ／Ｎｍ3以下にする必要
があるが、前記パルス荷電を採用した乾式電気集塵機で
は、せいぜい２０〜３０ｍｇ／Ｎｍ3が限度であり、完
全に目的を達成することができない。また、前記排煙脱
硫設備等を湿式電気集塵機の前に設置するには、設備
費、運転費共に著しく高くなり、前記目的のみでは経済
的に採用することは困難である。For this reason, in order to eliminate the coloring of the main exhaust gas of the sintering machine, a method of improving the efficiency of the dry type electrostatic precipitator by adopting pulse charging, or a flue gas desulfurization equipment is installed in the preceding stage of the precipitator. By doing so, a method that enables application of a wet electrostatic precipitator has been studied. However, in order to eliminate the colored smoke of the main exhaust gas of the sintering machine, it is necessary to set the dust concentration to about 10 mg / Nm 3 or less. However, in the dry electrostatic precipitator adopting the pulse charging, it is at most 20- The limit is 30 mg / Nm 3 , and the objective cannot be achieved completely. In addition, if the flue gas desulfurization equipment and the like are installed in front of the wet electrostatic precipitator, both the equipment cost and the operating cost are remarkably high, and it is difficult to economically adopt the above purpose alone.
【０００５】また、他の方法としては、焼結機主排風ガ
スの吸引系統を、焼結機の定常操業下における排ガス中
の通常の水分含有率８〜１０％の範囲を保ったまま、こ
れと排ガス温度の関係に従う排ガス中焼結ダストの電気
抵抗が１０11Ωｃｍ以下となる排ガス温度範囲毎に各ウ
インドボックスの組合せを選択して接続することにより
複数系統に分割し、各ウインドボックスに吸引される焼
結排ガスを互いに異なる温度域毎に混合し、その混合ガ
スについて個別に電気集塵を施す方法（特開昭４８−９
７７０８号公報）、焼結機主排風ガスを乾式電気集塵機
またはサイクロン集塵機を用いて除塵し、ついでこのガ
スを開孔率３０〜５０％の多孔板棚を少なくとも１段設
けた、堰および溢流部のない棚段塔に導き、該棚段塔で
水性循環液と所定の条件で気液接触させる方法（特公昭
５９−２５６１５号公報）等が提案されている。In another method, the main exhaust gas of the sintering machine is kept in the suction system while keeping the normal moisture content of 8 to 10% in the exhaust gas under the normal operation of the sintering machine. According to the relationship between the exhaust gas temperature and the exhaust gas temperature, the electrical resistance of the exhaust dust in the exhaust gas is 10 11 Ωcm or less. A method of mixing the sucked sintering exhaust gas in different temperature ranges and individually subjecting the mixed gas to electrostatic precipitating (JP-A-48-9).
No. 7708), the main exhaust gas of the sintering machine is removed by using a dry type electrostatic precipitator or a cyclone precipitator, and then this gas is provided with at least one perforated plate shelf having a porosity of 30 to 50%. A method has been proposed in which the solution is introduced into a plate column without a flow section and brought into gas-liquid contact with an aqueous circulating liquid in the plate column under predetermined conditions (Japanese Patent Publication No. 59-25615).
【０００６】[0006]
【発明が解決しようとする課題】前記特開昭４８−９７
７０８号公報および特公昭５９−２５６１５号公報に開
示の方法は、いずれも多大な設備投資を伴うこと、管理
が複雑で安定的な処理が困難であることから、抜本的な
解決策とは成り得ない。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention JP-A-48-97
The methods disclosed in Japanese Patent Publication No. 708 and Japanese Patent Publication No. 59-25615 both require a large amount of capital investment and are complicated to manage and difficult to perform stable treatment. Therefore, they are not radical solutions. I don't get it.
【０００７】この発明の目的は、焼結鉱製造設備の焼結
機主排風ガスの着色煙を解消できる焼結鉱製造設備の集
塵方法を提供することにある。An object of the present invention is to provide a dust collecting method for a sinter ore manufacturing facility, which can eliminate colored smoke of the main exhaust gas from the sintering machine of the sinter ore manufacturing facility.
【０００８】[0008]
【課題を解決するための手段】本発明者らは、上記目的
を達成すべく種々試験検討を重ねた。その結果、従来か
ら焼結機主排風ガスの着色は解消できるが、濾布目詰ま
り等のため連続使用が困難といわれていたバグフィルタ
ーを使用し、かつ焼結鉱製品搬送ラインの含塵ガス用バ
グフィルターと同規模として交互に一定時間毎に切替
え、濾布の払い落としは焼結機主排風ガスから焼結鉱製
品搬送ラインの含塵ガスへの切替え前に行うことによっ
て、連続使用できるとの結論に至り、この発明に到達し
た。Means for Solving the Problems The inventors of the present invention have conducted various tests and examinations in order to achieve the above object. As a result, the coloring of the main exhaust gas from the sintering machine can be eliminated from the past, but a bag filter, which was said to be difficult to use continuously due to filter cloth clogging, etc., is used, and the dust-containing gas in the sinter product transfer line is used. The bag filter is of the same scale as the bag filter for use, and is switched at regular intervals, and the filter cloth is wiped off before switching from the main exhaust gas from the sintering machine to dust-containing gas in the sintered ore product transfer line, allowing continuous use. The inventors have reached the conclusion that they can, and reached the present invention.
【０００９】すなわちこの発明は、焼結鉱製造設備の焼
結機主排風ガスと製品搬送ラインの含塵ガスとを除塵す
る方法において、集塵機として２基の同規模のバグフィ
ルターを使用し、製品搬送ラインの含塵ガスと焼結機主
排風ガスとを一定時間集塵する毎に交互に切替えると共
に、濾布の払い落としを焼結機主排風ガスから製品搬送
ラインの含塵ガスへの切替え前に行うのである。That is, according to the present invention, in the method for removing the main exhaust gas from the sintering machine of the sinter production facility and the dust-containing gas from the product transfer line, two bag filters of the same scale are used as the dust collector. The dust-containing gas from the product transfer line and the exhaust gas from the main sintering machine are switched alternately every time dust is collected for a certain period of time, and the dust of the filter cloth is removed from the main exhaust gas from the sintering machine from the main exhaust gas of the sintering machine. This is done before switching to.
【００１０】[0010]
【作用】この発明においては、集塵機として２基の同規
模のバグフィルターを使用し、製品搬送ラインの含塵ガ
スと焼結機主排風ガスとを一定時間集塵する毎に交互に
切替えると共に、濾布の払い落としを焼結機主排風ガス
から製品搬送ラインの含塵ガスへの切替え前に行うこと
によって、バグフィルターの濾布には粒子が粗く粘着性
を有しない製品搬送ラインの含塵ガス中のダストが付着
したのち、粒子が細かくかつ水分およびアルカリ（ナト
リウム、カリウム等）分により粘着性を有する焼結機主
排風ガス中のダストが捕集されることとなる。このた
め、バグフィルターの濾布目詰まり等を防止できると共
に、付着ダストの払い落としが容易となり、連続運転が
可能となる。しかも、焼結機主排風ガスをバグフィルタ
ーで連続処理することによって、除塵後の焼結機主排風
ガス中のダスト濃度を１０ｍｇ／Ｎｍ3以下に保持する
ことができ、焼結鉱製造設備の煙突からの着色煙の排出
を解消することができる。In the present invention, two bag filters of the same scale are used as the dust collector, and the dust-containing gas in the product transfer line and the main exhaust gas from the sintering machine are alternately switched every time dust is collected. By removing the filter cloth before switching from the main exhaust gas of the sintering machine to the dust-containing gas of the product transfer line, the filter cloth of the bag filter has a coarse particle and does not have stickiness. After the dust in the dust-containing gas adheres, the dust in the main exhaust gas from the sintering machine, which has fine particles and has an adhesive property due to moisture and alkali (sodium, potassium, etc.), will be collected. Therefore, it is possible to prevent clogging of the filter cloth of the bag filter and the like, and it becomes easy to remove the adhered dust, which enables continuous operation. Moreover, the dust concentration in the main exhaust gas of the sintering machine after dust removal can be maintained at 10 mg / Nm 3 or less by continuously treating the main exhaust gas of the sintering machine with a bag filter. Emission of colored smoke from the equipment chimney can be eliminated.
【００１１】この発明において、集塵機として２基の同
規模のバグフィルターを使用するのは、交互に一定時間
毎に切替え可能とするためである。また、排風機も同一
風量、同一仕様のものを使用する。通常、焼結機主排風
ガスと製品搬送ラインの含塵ガスとの排ガス量は、概ね
等しいことが多いが、著しく異なる場合は、いずれかの
余剰ガスを処理する別系統の集塵機を設置すればよい。
２基の同規模のバグフィルターの切替えは、焼結機主排
風ガスと製品搬送ラインの含塵ガスとを各々別ラインで
２基のバグフィルターまで導き、各ラインはバグフィル
ター入側の手前で切替えダンパーと渡りダクトによっ
て、交互に切替えできるように構成すればよい。In the present invention, two bag filters of the same scale are used as the dust collector so that they can be alternately switched at regular intervals. Also, use the same type of exhaust fan with the same air volume and specifications. Usually, the exhaust gas amounts of the main exhaust gas of the sintering machine and the dust-containing gas of the product transfer line are almost the same in most cases, but if they are significantly different, install a dust collector of another system to treat any surplus gas. Good.
To switch between two bag filters of the same scale, the main exhaust gas from the sintering machine and the dust-containing gas from the product transfer line are guided to two bag filters on separate lines, and each line is in front of the bag filter entry side. The switching damper and the crossover duct may be used so that they can be switched alternately.
【００１２】[0012]
【実施例】以下にこの発明の詳細を実施態様を示す図１
ないし図２に基いて説明する。図１はこの発明方法を実
施する焼結鉱製造設備の集塵装置の全体説明図、図２は
２基のバグフィルターの集塵パターンの一例を示す説明
図である。図１において、ドワイトロイド式焼結機１の
パレット２上に焼結原料ホッパー３から切出され積層さ
れた焼結原料は、図示しない点火炉で点火されたのち、
パレット２の下端に沿って配設されたウインドボックス
群４、４、４・・・を通じて排風支管５、５、５・・
・、主排風管６により廃熱回収装置７を経てバグフィル
ター８を介して排風機９により下方に強制吸気され、排
鉱部１０に至る間に焼成される。排風機９により吸引さ
れた焼結機主排風ガスは、廃熱回収装置７で熱回収され
たのち、バグフィルター８で除塵され煙突２０から排出
される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to FIG.
Or, it demonstrates based on FIG. FIG. 1 is an overall explanatory view of a dust collecting device of a sinter ore manufacturing facility for carrying out the method of the present invention, and FIG. 2 is an explanatory diagram showing an example of a dust collecting pattern of two bag filters. In FIG. 1, the sintering raw material cut out from the sintering raw material hopper 3 and stacked on the pallet 2 of the Dwightroid type sintering machine 1 is ignited by an ignition furnace (not shown),
The wind exhaust pipes 5, 5, 5 ... Through the wind box groups 4, 4, 4 arranged along the lower end of the pallet 2.
The main exhaust pipe 6 passes through the waste heat recovery device 7, the bag filter 8, and the exhaust fan 9 forcibly sucks the air downward, and it is fired while reaching the exhaust ore section 10. The main exhaust gas of the sintering machine sucked by the exhaust fan 9 is subjected to heat recovery by the waste heat recovery device 7, then dust is removed by the bag filter 8 and exhausted from the chimney 20.
【００１３】焼成された焼結鉱は、排鉱部１０下方の破
砕機１１で破砕されたのち、クーラ１２において、ファ
ン１３による排気により空気によって徐冷されたのち、
コンベア１４、１５、１６により高炉へ搬送される。破
砕部、クーラ１２の各ファン１３からの含塵ガスおよび
コンベア１４、１５、１６の乗継ぎ部からの含塵ガス、
すなわち焼結鉱製品搬送ラインの含塵ガスは、製品搬送
ライン排風管１７を介して排風機１８によりバグフィル
ター１９に導入され、除塵されたのち煙突２０から排出
される。排風管１７と主排風管６は、それぞれバグフィ
ルター１９、８入側の手前で切替えダンパー２１、２
２、２３、２４と渡りダクト２５、２６によって連結さ
れ、切替えダンパー２１、２２、２３、２４の開閉によ
ってバグフィルター１９、８の切替えができるよう構成
されている。The calcined sinter is crushed by a crusher 11 below the mine ore unit 10, and then is gradually cooled by air in a cooler 12 by exhaust air from a fan 13,
It is conveyed to the blast furnace by conveyors 14, 15 and 16. The crushing portion, the dust-containing gas from each fan 13 of the cooler 12 and the dust-containing gas from the connecting portions of the conveyors 14, 15, 16;
That is, the dust-containing gas in the sinter product transfer line is introduced into the bag filter 19 by the air blower 18 via the product transfer line exhaust pipe 17, and after being dusted, it is exhausted from the chimney 20. The exhaust pipe 17 and the main exhaust pipe 6 are switched to the dampers 21 and 2 in front of the bag filters 19 and 8 respectively.
2, 23, 24 are connected by crossover ducts 25, 26, and the bag filters 19, 8 can be switched by opening / closing the switching dampers 21, 22, 23, 24.
【００１４】また、上記バグフィルター１９、８は、同
一風量、同一仕様であり、排風機１８、９も同一風量、
同一仕様に構成され、排風管１７と主排風管６からの吸
引するバグフィルターを切替えしても、何ら支障の生じ
ないように構成する。バグフィルター１９、８の切替え
は、一定時間毎に実施するものとし、バグフィルター１
９、８の濾布のダスト払い落としは、必ず捕集ダストの
初層が焼結鉱製品搬送ラインの含塵ガスのダストで形成
されるよう、図２に示すパターンで実施するよう構成さ
れている。The bag filters 19 and 8 have the same air volume and the same specifications, and the air exhausters 18 and 9 have the same air volume.
It is configured to have the same specifications so that even if the bag filters sucking air from the exhaust pipe 17 and the main exhaust pipe 6 are switched, no trouble occurs. Switching between the bag filters 19 and 8 shall be performed at regular intervals.
The dust removal of the filter cloths 9 and 8 is configured to be performed in the pattern shown in FIG. 2 so that the first layer of the collected dust is always formed by the dust-containing gas dust of the sinter product transfer line. There is.
【００１５】上記のとおり構成したことによって、粒子
が細かくかつ含有水分およびアルカリ分により粘着性を
有するダストを含む焼結機主排風ガスは、排風支管５、
５、５・・・、主排風管６を介して排風機９により吸引
され、廃熱回収装置７で熱回収されたのち、粒子が粗く
粘着性を有しない焼結鉱製品搬送ラインの含塵ガスのダ
ストで濾布に初層が形成されたバグフィルター８で除塵
され煙突２０から排出される。一方、粒子が粗く粘着性
を有しないダストを含む焼結鉱製品搬送ラインの破砕
部、クーラ１２の各ファン１３およびコンベア１４、１
５、１６の乗継ぎ部からの含塵ガスは、製品搬送ライン
排風管１７を介して排風機１８によりバグフィルター１
９に導入され、除塵されたのち煙突２０から排出され
る。With the above-mentioned configuration, the main exhaust gas of the sintering machine containing fine particles and dust having adhesiveness due to the water content and the alkali content is the exhaust branch pipe 5,
5, 5, ... After being sucked by the exhaust fan 9 through the main exhaust pipe 6 and heat-recovered by the waste heat recovery device 7, there is included a sintered ore product transportation line having coarse particles and no stickiness. The dust of the dust gas is removed by the bag filter 8 having the initial layer formed on the filter cloth, and the dust is discharged from the stack 20. On the other hand, the crushing section of the sintered ore product transportation line containing coarse particles and non-sticky dust, each fan 13 of the cooler 12 and the conveyor 14, 1,
The dust-containing gas from the connecting portions of Nos. 5 and 16 is sent to the bag filter 1 by the air blower 18 via the exhaust pipe 17 of the product transfer line.
It is introduced into the chamber 9 to remove dust and then discharged from the chimney 20.
【００１６】一定時間が経過して焼結機主排風ガスをバ
グフィルター８から切替えてバグフィルター１９に導入
する場合は、バグフィルター８の入側の切替えダンパー
２３を閉止して渡りダクト２６の切替えダンパー２４を
開放し、バグフィルター１９の入側の切替えダンパー２
１を閉止して渡りダクト２５の切替えダンパー２２を開
放すれば、焼結機主排風ガスは排風機１８により吸引さ
れてバグフィルター１９に導入され、焼結鉱製品搬送ラ
インの含塵ガスのダストの上層に捕集されたのち煙突２
０から排出される。一方、粒子が粗く粘着性を有しない
ダストを含む焼結鉱製品搬送ラインの破砕部、クーラ１
２の各ファン１３およびコンベア１４、１５、１６の乗
継ぎ部からの含塵ガスは、上記切替えによって排風機９
により吸引されて渡りダクト２５を介してバグフィルタ
ー８に導入され、除塵されたのち煙突２０から排出され
る。When the main exhaust gas from the sintering machine is switched from the bag filter 8 and introduced into the bag filter 19 after a certain time has passed, the switching damper 23 on the inlet side of the bag filter 8 is closed and the crossover duct 26 is closed. The switching damper 24 is opened, and the switching damper 2 on the entrance side of the bag filter 19 is opened.
When 1 is closed and the switching damper 22 of the crossover duct 25 is opened, the main exhaust gas of the sintering machine is sucked by the exhaust machine 18 and introduced into the bag filter 19, and the dust-containing gas of the sintered ore product conveying line is discharged. Chimney 2 after being collected in the upper layer of dust
Emitted from 0. On the other hand, the crusher, cooler 1 of the sinter ore product transportation line containing coarse particles and non-sticky dust
The dust-containing gas from each fan 13 of No. 2 and the connecting portions of the conveyors 14, 15 and 16 is blown by the blower 9 by the above switching.
Is sucked into the bag filter 8 through the crossover duct 25, dust is removed, and then discharged from the chimney 20.
【００１７】上記バグフィルター８、１９の切替えは、
一定時間毎に実施され、バグフィルター１９、８の濾布
のダスト払い落としは、図２に示すパターンで実施され
るから、バグフィルター８、１９の濾布には、捕集ダス
トの初層が必ず焼結鉱製品搬送ラインの含塵ガスのダス
トで形成される。これによって、焼結機主排風ガス中の
粒子が細かくかつ含有水分およびアルカリ分により粘着
性を有するダストは、常に粒子が粗く粘着性を有しない
焼結鉱製品搬送ラインの含塵ガスのダストで濾布に初層
が形成されたバグフィルター８またはバグフィルター１
９に交互に導入され、焼結鉱製品搬送ラインの含塵ガス
のダストの上層に捕集されるから、濾布の目詰まりを防
止できると共に、ダストの払い落としも容易に実施で
き、連続運転することができる。しかも、煙突２０から
放出される排ガスは、バグフィルター８またはバグフィ
ルター１９により除塵処理されてダスト濃度が１０ｍｇ
／Ｎｍ3以下に保持され、煙突からの着色煙が解消され
る。Switching of the bag filters 8 and 19 is as follows.
Since the dust removal of the filter cloths of the bag filters 19 and 8 is performed at regular time intervals according to the pattern shown in FIG. 2, the filter cloths of the bag filters 8 and 19 have the first layer of collected dust. It is always formed of dust of dust-containing gas in the transportation line of sintered ore products. As a result, dust with fine particles in the main exhaust gas of the sintering machine and sticky due to the water content and alkali content is always dusty gas of dust-containing gas in the sinter ore product transportation line where the particles are coarse and do not have stickiness. Bag filter 8 or bag filter 1 with the first layer formed on the filter cloth
9 is alternately introduced and is collected in the upper layer of dust-containing gas dust in the sinter product transfer line, so the filter cloth can be prevented from clogging and dust can be easily wiped off for continuous operation. can do. Moreover, the exhaust gas discharged from the chimney 20 is subjected to dust removal processing by the bag filter 8 or the bag filter 19 to have a dust concentration of 10 mg.
/ Nm 3 or less, the colored smoke from the chimney is eliminated.
【００１８】[0018]
【発明の効果】以上述べたとおり、この発明方法によれ
ば、従来適用困難とされていた焼結機主排風ガスのバグ
フィルターによる集塵が可能となり、焼結鉱製造設備の
高煙突からの着色煙を解消することができる。As described above, according to the method of the present invention, it is possible to collect dust from the main exhaust gas of the sintering machine by a bag filter, which has been difficult to apply in the past. The colored smoke of can be eliminated.
【図１】この発明方法を実施する焼結鉱製造設備の集塵
装置の全体説明図である。FIG. 1 is an overall explanatory view of a dust collector of a sinter production facility for carrying out the method of the present invention.
【図２】２基のバグフィルターの集塵パターンの一例を
示す説明図である。FIG. 2 is an explanatory diagram showing an example of a dust collection pattern of two bag filters.
１ 焼結機 ２ パレット ３ 焼結原料ホッパー ４ ウインドボックス ５ 排風支管 ６ 主排風管 ７ 廃熱回収装置 ８、１９ バグフィルター ９、１８ 排風機 １０ 排鉱部 １１ 破砕機 １２ クーラ １３ ファン １４、１５、１６ コンベア １７ 製品搬送ライン排風管 ２０ 煙突 ２１、２２、２３、２４ 切替えダンパー ２５、２６ 渡りダクト 1 Sintering machine 2 Pallet 3 Sintering raw material hopper 4 Windbox 5 Exhaust air branch pipe 6 Main exhaust air pipe 7 Waste heat recovery device 8, 19 Bag filter 9, 18 Exhaust blower unit 10 Crusher 12 Cooler 13 Fan 14 , 15, 16 Conveyor 17 Product transfer line Exhaust pipe 20 Chimney 21, 22, 23, 24 Switching damper 25, 26 Cross duct
Claims (1)
品搬送ラインの含塵ガスとを除塵する方法において、集
塵機として２基の同規模のバグフィルターを使用し、製
品搬送ラインの含塵ガスと焼結機主排風ガスとを一定時
間集塵する毎に交互に切替えると共に、濾布の払い落と
しを焼結機主排風ガスから製品搬送ラインの含塵ガスへ
の切替え前に行うことを特徴とする焼結鉱製造設備の集
塵方法。1. A method for removing dust from a main exhaust gas of a sintering machine of a sinter production facility and dust-containing gas of a product transfer line, wherein two bag filters of the same scale are used as a dust collector and the product transfer line is used. The dust-containing gas and the main exhaust gas from the sintering machine are switched alternately every time dust is collected for a certain period of time, and the filter cloth is switched off from the main exhaust gas from the sintering machine to the dust gas on the product transfer line. A method for collecting dust in a sinter ore manufacturing facility, characterized by being performed before.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4301826A JPH06126115A (en) | 1992-10-13 | 1992-10-13 | Method for dust collection in sintered ore manufacturing facilities |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4301826A JPH06126115A (en) | 1992-10-13 | 1992-10-13 | Method for dust collection in sintered ore manufacturing facilities |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06126115A true JPH06126115A (en) | 1994-05-10 |
Family
ID=17901632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4301826A Pending JPH06126115A (en) | 1992-10-13 | 1992-10-13 | Method for dust collection in sintered ore manufacturing facilities |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06126115A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104128347A (en) * | 2014-07-10 | 2014-11-05 | 侯计文 | Method and system for dust disposal during ore processing |
| CN105301170A (en) * | 2014-06-09 | 2016-02-03 | 宝山钢铁股份有限公司 | Multifunctional efficient sintering cup experimental device and method |
| CN110787575A (en) * | 2019-10-30 | 2020-02-14 | 丁武轩 | Smoke purification tower for recycling dust of sintering machine head of steel plant |
-
1992
- 1992-10-13 JP JP4301826A patent/JPH06126115A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301170A (en) * | 2014-06-09 | 2016-02-03 | 宝山钢铁股份有限公司 | Multifunctional efficient sintering cup experimental device and method |
| CN104128347A (en) * | 2014-07-10 | 2014-11-05 | 侯计文 | Method and system for dust disposal during ore processing |
| CN110787575A (en) * | 2019-10-30 | 2020-02-14 | 丁武轩 | Smoke purification tower for recycling dust of sintering machine head of steel plant |
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