JPH0577934A - Method and device for supplying powder material for air classifier - Google Patents
Method and device for supplying powder material for air classifierInfo
- Publication number
- JPH0577934A JPH0577934A JP24315791A JP24315791A JPH0577934A JP H0577934 A JPH0577934 A JP H0577934A JP 24315791 A JP24315791 A JP 24315791A JP 24315791 A JP24315791 A JP 24315791A JP H0577934 A JPH0577934 A JP H0577934A
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- JP
- Japan
- Prior art keywords
- raw material
- powder
- pipe
- powder raw
- air flow
- 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.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、気流分級機の粉体原料
供給方法、より詳しくは、気流分級機を原料供給処理状
態においたまま、噴射型原料供給機の噴出付近に付着し
た粉体を効率よく除去する気流分級機の粉体原料供給方
法、およびこの方法を実施するための装置に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for supplying a powder raw material for an air stream classifier, and more particularly to a powder adhered in the vicinity of a jet of a jet type raw material feeder while the air stream classifier is in a raw material supply processing state. TECHNICAL FIELD The present invention relates to a powder raw material supply method for an air stream classifier that efficiently removes carbon dioxide, and an apparatus for carrying out this method.
【０００２】[0002]
【従来の技術】従来、気流分級機へ粉体原料を供給する
方法として、例えば、図４に示すような噴射型原料供給
機を使用し、加圧空気によって粉体原料を吹き込む方法
が知られている。2. Description of the Related Art Conventionally, as a method for supplying a powder raw material to an air stream classifier, there is known a method in which an injection type raw material feeder as shown in FIG. 4 is used and the powder raw material is blown by pressurized air. ing.
【０００３】この方法によれば、図示しない空気供給源
からノズル１２に供給された供給空気１８は、ノズル１
２の開孔部から高速気流１９として噴出する。原料受け
１１内の粉体原料１０は、高速気流１９による圧力降下
によって高速気流１９内に引込まれ、次にディフユーザ
１３内で拡散され、粉体噴出管１５の噴出口１５ａから
後述する気流分級機に供給されて分級される。According to this method, the supply air 18 supplied from the air supply source (not shown) to the nozzle 12 is
A high-speed airflow 19 is ejected from the opening of No. 2. The powder raw material 10 in the raw material receiver 11 is drawn into the high-speed air stream 19 by the pressure drop by the high-speed air stream 19, then diffused in the diff user 13, and is separated from the jet port 15a of the powder jet pipe 15 by the air stream classification described later. It is supplied to the machine and classified.
【０００４】[0004]
【発明が解決しようとする課題】ところで、上記従来の
噴射型原料供給機において、粉体原料が微粉である場
合、粒子自体が内壁に付着しやすい性質があり、特に超
微粒子においては比表面積が非常に大きいので、空気湿
度及び圧縮空気中の湿分の影響により該原料供給機の噴
出口１５ａ付近の内壁に粉体が付着する傾向が著しい。By the way, in the above-mentioned conventional jet type raw material feeder, when the powder raw material is fine powder, the particles themselves tend to adhere to the inner wall. Since it is very large, the powder tends to adhere to the inner wall near the ejection port 15a of the raw material feeder due to the influence of air humidity and moisture in the compressed air.
【０００５】そして、このように内壁に粉体が付着を始
めると、その付着物は次第に成長して、噴出口１５ａの
断面積を縮小せしめるため、原料供給量が減少し、結果
的に気流分級機の処理量が低下してしまう。When the powder starts to adhere to the inner wall in this way, the adhered material gradually grows to reduce the cross-sectional area of the ejection port 15a, so that the raw material supply amount decreases and, as a result, the air flow classification. The throughput of the machine decreases.
【０００６】しかるに、このような付着物の成長を放置
して運転を長時間継続したり、その付着が予想されるよ
りも早期に進んだ場合には、運転を休止させざるを得な
くなる事態になる。[0006] However, if the operation is continued for a long time while the growth of such deposits is left unattended, or if the deposits proceed earlier than expected, the operation must be stopped. Become.
【０００７】そして、このように気流分級機の処理量が
減少し、運転の休止回数が多くなると、製品単位重量当
たりの製造費が高くなり、場合によっては経済性が失わ
れることになる。[0007] When the throughput of the air stream classifier is reduced and the number of operation suspensions is increased as described above, the manufacturing cost per unit weight of the product is increased, and the economic efficiency is lost in some cases.
【０００８】例えば、後述の実施例に示すように、気流
分級機で超微粉石灰石を正常時には０．７ｔ／ｈ処理し
ている。ところが、原料供給機の噴出口付近の内壁に厚
さ１ｍｍの粉体が付着することによって、その処理量は
０．４ｔ／ｈと半分近くに低下する。For example, as shown in the examples described later, 0.7 t / h of ultrafine limestone is normally treated by an air stream classifier. However, since the powder having a thickness of 1 mm adheres to the inner wall near the ejection port of the raw material feeder, the throughput is reduced to 0.4t / h, which is almost half.
【０００９】このような場合、これまでは運転員が定量
供給機を操作し原料供給機への原料供給量を減らして暫
時運転を継続し、更に処理量が低下した時点において装
置の運転を止めて、原料供給機を取り外し、人手で付着
物を除去しているのが実状である。In such a case, until now, the operator has operated the fixed quantity feeder to reduce the amount of raw material supplied to the raw material feeder to continue the temporary operation, and stop the operation of the apparatus when the processing amount further decreases. Then, the raw material feeder is removed and the deposits are manually removed.
【００１０】一方、本発明者らにより、原料供給機の先
端部材の内面処理も試みられたが、粉体による付着を防
止し付着状態を減らすことはできなかった。On the other hand, the inventors of the present invention also tried to treat the inner surface of the tip member of the raw material feeder, but could not prevent the adhesion by the powder and reduce the adhesion state.
【００１１】本発明は、このような事情に鑑みてなされ
たもので、その目的は、気流分級機を原料供給処理状態
においたまま、噴射型原料供給機の噴出口付近に付着し
た粉体を効率よく除去する気流分級機の粉体原料供給方
法及びこの方法を実施するための装置を提供することに
ある。The present invention has been made in view of the above circumstances, and an object thereof is to remove powder adhered in the vicinity of the jet port of an injection type raw material feeder while the air stream classifier is in the raw material supply processing state. An object of the present invention is to provide a powder raw material supply method for an air stream classifier that efficiently removes and an apparatus for carrying out this method.
【００１２】[0012]
【課題を解決するための手段】上記目的を達成する本発
明の方法は、粉体原料を噴射型原料供給機の管路内を高
速気流により搬送し下流側の噴出口から気流分級機へ吹
き込む工程と、前記管路の上流側から下流側に至る中間
部分に配設された気体導入手段により前記噴出口付近の
内壁へ向けて圧縮空気を間欠的に噴出し該部分に付着し
た粉体を吹き落し除去する工程と、を含んでなる気流分
級機の粉体原料供給方法から構成される。In the method of the present invention for achieving the above object, a powder raw material is conveyed by a high-speed air flow in a pipe of a jet type raw material feeder and is blown into an air flow classifier from a jet outlet on the downstream side. Step and compressed powder is intermittently ejected toward the inner wall near the ejection port by the gas introduction means arranged in the intermediate portion from the upstream side to the downstream side of the pipeline to remove the powder adhered to the portion. And a step of removing by blowing off, and a powder raw material supply method of an air stream classifier.
【００１３】また、本発明の装置は、前記管路の中間部
分における対面する側壁に、中心線が互いに交差しかつ
前記噴出口付近の対面する内壁へ指向するように配設し
た対をなす気体導入用配管と、これら配管に配した電磁
弁と、これら電磁弁を開閉させ、前記配管により間欠的
にかつ交互に圧縮空気を前記管路内へ噴出させるタイマ
とを有する構成とするものである。Further, in the apparatus of the present invention, a pair of gas is disposed on the facing side walls in the middle portion of the pipe line so that the center lines intersect each other and are directed to the facing inner wall near the jet outlet. The pipes for introduction, solenoid valves arranged in these pipes, and a timer for opening and closing these solenoid valves and intermittently and alternately ejecting compressed air into the pipes by the pipes are provided. .
【００１４】[0014]
【作用】本発明による方法によれば、気流分級機を原料
供給処理状態においたまま、噴射型原料供給機の噴出口
付近に付着した粉体が効率よく除去される。従って、粉
体原料が壁面に付着しやすい微粉、超微粉である場合で
も、粉体の付着による気流分級機の処理量の低下や運転
の休止を回避することができる。According to the method of the present invention, the powder adhering to the vicinity of the jet port of the jet type raw material feeder is efficiently removed while the air stream classifier is in the raw material feeding processing state. Therefore, even if the powder raw material is a fine powder or an ultrafine powder that easily adheres to the wall surface, it is possible to avoid a decrease in the throughput of the airflow classifier and suspension of operation due to the adhesion of the powder.
【００１５】また、前記管路の中間部分における対面す
る側壁に、対をなす気体導入用配管をその中心線が互い
に交差しかつそれぞれ前記噴出口付近の対面する内壁へ
指向するように配設し、該配管に配した電磁弁とこれを
開閉させるタイマとにより該配管にそれぞれ間欠的にか
つ交互に圧縮空気を流して前記管路内へ噴出させる装置
を用いれば、前記粉体付着物の除去が自動的にかつ対面
する両壁面から効率よく行なわれる。Further, a pair of gas introducing pipes are arranged on the facing side walls in the intermediate portion of the pipe line so that their center lines intersect each other and are directed to the facing inner walls near the ejection port, respectively. If a device that causes compressed air to flow through the pipe intermittently and alternately by means of a solenoid valve arranged in the pipe and a timer that opens and closes the pipe is used to remove the powder deposits, Is performed automatically and efficiently from both facing wall surfaces.
【００１６】[0016]
【実施例】以下、本発明の一実施例を図面を参照しなが
ら説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
【００１７】まず、本発明の実施に好適な装置について
説明する。First, an apparatus suitable for carrying out the present invention will be described.
【００１８】なお、図１は本発明を実施して気流分級機
へ粉体原料を供給している状態を示す系統図、図２及び
図３は本発明で使用する噴射型原料供給機の一例を示す
一部を切欠いた側面図及び平面図であり、図４と同一部
品は同一番号で示してある。Incidentally, FIG. 1 is a system diagram showing a state in which the powder raw material is being supplied to the air stream classifier by carrying out the present invention, and FIGS. 2 and 3 are examples of the injection type raw material feeder used in the present invention. FIG. 4 is a side view and a plan view in which a part of FIG.
【００１９】図１において、１は原料定量供給機、２は
噴射型原料供給機、３は気流分級機である。In FIG. 1, 1 is a raw material quantitative feeder, 2 is an injection type raw material feeder, and 3 is an air stream classifier.
【００２０】前記原料定量供給機１としては、図示のよ
うに、原料ホッパ１ａ内の粉体原料１０がテーブルフィ
ーダ１ｂにより切出されて振動フィーダ１ｃを経て供給
される形式のものなどを用いることができる。As the raw material quantitative feeder 1, as shown in the figure, a raw material hopper 1a of a type in which the powder raw material 10 is cut out by a table feeder 1b and fed through a vibrating feeder 1c is used. You can
【００２１】また、前記気流分級機３としては、例え
ば、日鉄鉱業社製エルボージェット分級機などを用いる
ことができる。As the air flow classifier 3, for example, an elbow jet classifier manufactured by Nittetsu Mining Co., Ltd. can be used.
【００２２】前記噴射型原料供給機２は、本実施例で
は、図２、３に示すように、原料受け１１、ノズル１
２、ディフユーザ１３、連結管１４、粉体噴出管１５と
から構成されている。In the present embodiment, the jet type raw material feeder 2 has a raw material receiver 11 and a nozzle 1 as shown in FIGS.
2, a diff user 13, a connecting pipe 14, and a powder ejection pipe 15.
【００２３】気体導入用配管は、図３に示すように、連
結管１４の対面する側壁の穿孔に挿着された対をなす配
管１６ａ、１６ｂを有し、それぞれの配管１６ａ、１６
ｂは図示のように、平面視で、その中心線が互いに交差
しかつそれぞれ噴出口１５ａ付近の対面する内壁へ指向
するように対角線方向を狙って配置されている。また、
該配管１６ａ、１６ｂは、図２に示すように、側面視
で、その中心線が、上流側から下流側に向って僅かの角
度δで下がるように下向きに傾斜している。なお、前記
配管１６ａ、１６ｂの中心線が側壁に対してなす角度
θ、及び該配管１６ａ、１６ｂの下向き角度δは、付着
物の除去に適切な角度に選定される。As shown in FIG. 3, the gas introducing pipes have a pair of pipes 16a and 16b inserted into the perforations of the side walls of the connecting pipe 14 facing each other.
As shown in the drawing, b are arranged in a diagonal direction so that their center lines intersect each other and are directed to the facing inner walls near the ejection port 15a, respectively, in plan view. Also,
As shown in FIG. 2, the pipes 16a and 16b are inclined downward in a side view so that the center line of the pipes 16a and 16b decreases from the upstream side to the downstream side at a slight angle δ. The angle θ formed by the center lines of the pipes 16a and 16b with respect to the side wall and the downward angle δ of the pipes 16a and 16b are selected to be suitable for removing the deposits.
【００２４】更に、前記配管１６ａ、１６ｂには、それ
ぞれ配管の途中に電磁弁１７ａ、１７ｂが設けられ、該
電磁弁１７ａ、１７ｂは、それぞれ図示しないタイマに
より任意の時間間隔で一定の時間、圧縮空気を交互に流
すように開閉される。Further, the pipes 16a and 16b are provided with solenoid valves 17a and 17b in the middle of the pipes, respectively, and the solenoid valves 17a and 17b are compressed by a timer (not shown) at predetermined time intervals for a predetermined time. It is opened and closed so that air flows alternately.
【００２５】次に、上記装置を用いた粉体原料供給方法
について説明する。Next, a powder raw material supply method using the above apparatus will be described.
【００２６】図１において、原料ホッパ１ａ内の粉体原
料１０がテーブルフィーダ１ｂにより切出されて振動フ
ィーダ１ｃを経て噴射型原料供給機２の原料受け１１に
供給される。In FIG. 1, the powder raw material 10 in the raw material hopper 1a is cut out by the table feeder 1b and supplied to the raw material receiver 11 of the jet type raw material feeder 2 through the vibration feeder 1c.
【００２７】一方、図２、３において、図示しない空気
供給源からノズル１２に供給された供給空気１８は、ノ
ズル１２の開孔部から高速気流１９として噴出する。原
料受け１１内の粉体原料１０は、高速気流１９による圧
力降下によって高速気流１９内に引込まれ、次にディフ
ユーザ１３内で拡散され、粉体噴出管１５の噴出口１５
ａから気流分級機３へ供給されて分級される。On the other hand, in FIGS. 2 and 3, the supply air 18 supplied to the nozzle 12 from an air supply source (not shown) is ejected as a high-speed air flow 19 from the opening of the nozzle 12. The powder raw material 10 in the raw material receiver 11 is drawn into the high-speed airflow 19 by the pressure drop by the high-speed airflow 19, and then diffused in the diff user 13, and the ejection port 15 of the powder ejection pipe 15 is ejected.
It is supplied to the airflow classifier 3 from a and classified.
【００２８】次いで、図１に示すように、微粉出口３ａ
から引出された粒度の細かい部分は図示しないバグフィ
ルタにより微粉として、また中間粉出口３ｂから引出さ
れた中間粒度の部分は図示しないバグフィルタにより中
間粉として、さらに粗粉出口３ｃから引出された粒度の
粗い部分は図示しないバグフィルタにより粗粉としてそ
れぞれ回収される。以上の構成は、従来のものと同様で
ある。Next, as shown in FIG. 1, the fine powder outlet 3a
The fine particle portion drawn out from is a fine powder by a bag filter (not shown), and the intermediate particle portion drawn from the intermediate powder outlet 3b is an intermediate powder by a bag filter (not shown), and the particle size drawn from the coarse powder outlet 3c. The coarse parts of the are collected as coarse powder by a bag filter (not shown). The above configuration is similar to the conventional one.
【００２９】ここで、本実施例では、図３に示すよう
に、電磁弁１７ａ、１７ｂとこれを開閉させる図示しな
いタイマとによって任意の時間間隔で一定の時間、圧縮
空気を気体導入用配管１６ａ、１６ｂから交互に導入
し、粉体噴出管１５の噴出口１５ａ付近の内壁に付着し
た粉体を吹き落すようにしている。Here, in this embodiment, as shown in FIG. 3, the compressed air is introduced into the gas introducing pipe 16a for a certain period of time by electromagnetic valves 17a and 17b and a timer (not shown) for opening and closing the solenoid valves 17a and 17b. , 16b are alternately introduced to blow off the powder adhering to the inner wall of the powder ejection pipe 15 near the ejection port 15a.
【００３０】従って、本実施例によれば、気流分級機を
原料供給処理状態においたまま、噴射型原料供給機の噴
出口付近に付着した粉体が効率よく除去され、粉体原料
が壁面に付着しやすい微粉、超微粉である場合でも、粉
体の付着による気流分級機の処理量の低下や運転の休止
を回避することができる。Therefore, according to this embodiment, the powder adhering to the vicinity of the jet port of the jet type raw material feeder is efficiently removed while the air stream classifier is in the raw material feeding processing state, and the powder raw material is deposited on the wall surface. Even in the case of fine powder or ultrafine powder that easily adheres, it is possible to avoid a reduction in the throughput of the airflow classifier and suspension of operation due to the adhesion of powder.
【００３１】なお、粉体付着物を除去するのに適した吹
き落し速度、方向、風量、吹き落し時間及び時間間隔な
どは、付着物の性状や付着状態によって違いがあるとこ
ろから、圧縮空気の使用効率を高めるため、予め幾つか
の内径の異なった気体導入用配管１６ａ、１６ｂを配し
た連結管１４を準備しておいて、適宜選択するのが望ま
しい。The blowing speed, direction, air volume, blowing time, time interval, etc. suitable for removing the powder adhered matter are different depending on the property and adhered state of the adhered matter. In order to improve the use efficiency, it is desirable to prepare the connecting pipe 14 in which several gas introducing pipes 16a and 16b having different inner diameters are arranged in advance and to select it appropriately.
【００３２】また、上記実施例におけるノズル１２、デ
ィフユーザ１３、連結管１４、粉体噴出管１５等は、図
示の例の長方形断面のものに限定されるものではなく、
このほか正方形断面のものなど適宜に選定することがで
きる。Further, the nozzle 12, the diff user 13, the connecting pipe 14, the powder ejection pipe 15 and the like in the above embodiment are not limited to the rectangular cross section of the illustrated example,
In addition, a square cross section can be appropriately selected.
【００３３】実験例 以下、実験例をあげてさらに詳しく説明する。Experimental Example Hereinafter, an experimental example will be described in more detail.
【００３４】本例は、日鉄鉱業社製エルボージェット分
級機（ＥＪ−７５型）を用い、原料として比表面積２
０，０００ｃｍ2／ｇ（平均径０．９μｍ）の超微粉石
灰石を処理量０．７ｔ／ｈで連続分級する場合の従来法
及び本発明方による実験例である。In this example, an elbow jet classifier (EJ-75 type) manufactured by Nittetsu Mining Co., Ltd. was used, and a specific surface area of 2 was used as a raw material.
It is a conventional method and an experimental example according to the present invention in the case of continuously classifying ultrafine limestone of 20,000 cm 2 / g (average diameter 0.9 μm) at a treatment amount of 0.7 t / h.
【００３５】従来法：原料供給機は、図４に示すように
構成された噴射型であり、粉体噴出管１５の噴出口１５
ａの寸法は幅７５ｍｍ×高さ４ｍｍ、風量５．４Ｎｍ3
／ｍｉｎ、噴出口風速３００ｍ／ｓｅｃとなっている。Conventional method: The raw material feeder is a jet type configured as shown in FIG. 4, and the jet outlet 15 of the powder jet pipe 15 is used.
The dimensions of a are width 75 mm x height 4 mm, air volume 5.4 Nm 3
/ Min, the jet air velocity is 300 m / sec.
【００３６】この従来法のものは、１日（２４時間）で
厚さ約１ｍｍの付着物が成長し、処理量は０．４ｔ／ｈ
程度の水準に落ちるため、最低でも１日１回は装置の運
転を止め、原料供給機を取り外して付着物を除去する必
要があった。そして、この付着物除去のために必要な時
間は、運転休止から運転再開まで約１〜２時間を必要と
した。In this conventional method, a deposit having a thickness of about 1 mm grows in one day (24 hours), and the treatment amount is 0.4 t / h.
Since it falls to a level of a certain degree, it was necessary to stop the operation of the apparatus at least once a day and remove the raw material feeder to remove the deposits. The time required for removing the deposits required about 1 to 2 hours from the suspension of operation to the restart of operation.
【００３７】本発明法：図２、３に示すように、噴射型
原料供給機の粉体噴出管１５とディフユーザ１３との間
に、長さ１５０ｍｍの連結管１４を挿入し、前記噴出管
１５の噴出口１５ａから上流側２８２ｍｍの所へ、内径
８ｍｍφの気体導入用配管１６ａ、１６ｂを両側壁に１
本ずつ、側壁に対しθ＝１５°の角度で、かつ下向き角
度δ＝２°をもって配設した。Method of the present invention: As shown in FIGS. 2 and 3, a connecting pipe 14 having a length of 150 mm is inserted between the powder ejection pipe 15 and the diff user 13 of the ejection type raw material feeder, and the ejection pipe is The gas introduction pipes 16a and 16b having an inner diameter of 8 mmφ are provided on both side walls from the jet port 15a of No. 15 to the upstream side 282 mm.
They were arranged one by one with respect to the side wall at an angle of θ = 15 ° and a downward angle δ = 2 °.
【００３８】この配管１６ａ、１６ｂへ圧力５Ｋｇ／ｃ
ｍ2の圧縮空気を供給し、電磁弁１７ａ、１７ｂをタイ
マで開閉し、圧縮空気を交互に噴出させて噴出口１５ａ
付近の内壁に付着した粉体の自動除去を行った。A pressure of 5 kg / c is applied to the pipes 16a and 16b.
supplying compressed air m 2, the solenoid valves 17a, 17b open and close by a timer, the compressed air is ejected alternately spout 15a
The powder adhering to the inner wall in the vicinity was automatically removed.
【００３９】このときの時間間隔は、８時間につき１回
の割合で８時間毎であり、片側の電磁弁１７ａを３ｓｅ
ｃ開き、閉じて３ｓｅｃ経ってから、他方側の電磁弁１
７ｂを３ｓｅｃ開とするのが、付着物の吹き落しに対し
て最も効果的であった。At this time, the time interval is once every 8 hours and every 8 hours, and the solenoid valve 17a on one side is set to 3 se.
c Open, close, and after 3 seconds, solenoid valve 1 on the other side
Opening 7b for 3 seconds was most effective for blowing off the deposit.
【００４０】この方法により、処理量０．７ｔ／ｈで運
転状態のまま付着物を自動的に除去し、連続操業を支障
なく行うことができた。By this method, the deposit was automatically removed in the operating state at the throughput of 0.7 t / h, and the continuous operation could be performed without any trouble.
【００４１】なお、この１回に使う圧縮空気量は、６ｓ
ｅｃ間で４６Ｎｌであり、この間に通過する原料供給機
風量５４０Ｎｌに比較すると約８％で非常に少なく、分
級成績に与える悪影響は全く認められなかった。The amount of compressed air used at this time is 6 s.
The ec was 46 Nl, which was very small at about 8% compared to the raw material supply air flow rate of 540 Nl passed during this period, and no adverse effect on classification results was observed.
【００４２】また、配管１６ａ、１６ｂとして、内径４
ｍｍφ、６ｍｍφ、８ｍｍφ及び１０ｍｍφの４種類を
準備して実験したが、この場合の付着物除去に対して
は、内径４ｍｍφのものが最も効果的であった。Further, the pipes 16a and 16b have an inner diameter of 4
Four types of mmφ, 6 mmφ, 8 mmφ and 10 mmφ were prepared and tested. The removal of deposits in this case was most effective with an inner diameter of 4 mmφ.
【００４３】[0043]
【発明の効果】以上説明したことから明らかなように本
発明は、以下の効果を奏するものである。As is apparent from the above description, the present invention has the following effects.
【００４４】本発明の方法によれば、気流分級機を原料
供給処理状態においたまま、噴射型原料供給機の噴出口
付近に付着した粉体を効率よく除去することができる。
従って、粉体原料が壁面に付着しやすい微粉、超微粉で
ある場合でも、粉体の付着による気流分級機の処理量の
低下や運転の休止を回避することができる。According to the method of the present invention, the powder adhering to the vicinity of the jet port of the jet type raw material feeder can be efficiently removed while the air stream classifier is in the raw material feeding processing state.
Therefore, even if the powder raw material is a fine powder or an ultrafine powder that easily adheres to the wall surface, it is possible to avoid a decrease in the throughput of the airflow classifier and suspension of operation due to the adhesion of the powder.
【００４５】また、前記管路の中間部分における対面す
る側壁に、対をなす気体導入用配管をその中心線が互い
に交差しかつそれぞれ前記噴出口付近の対面する内壁へ
指向するように配設し、該配管に配した電磁弁とこれを
開閉させるタイマとにより該配管にそれぞれ間欠的にか
つ交互に圧縮空気を流して前記管路内へ噴出させる本発
明による装置を用いれば、前記粉体付着物の除去が自動
的にかつ対面する両壁面から効率よく行なわれ、前述の
本発明の方法を好都合に実施することができる。Further, a pair of gas-introducing pipes are arranged on the facing side walls in the intermediate portion of the pipe line so that their center lines intersect each other and are directed to the facing inner walls near the jet outlets, respectively. If a device according to the present invention that causes compressed air to flow intermittently and alternately into the pipe by a solenoid valve arranged in the pipe and a timer that opens and closes the pipe to eject the compressed air into the pipe, The removal of the kimono is performed automatically and efficiently from both facing wall surfaces, and the above-described method of the present invention can be conveniently performed.
【図１】図１は本発明の実施例を示す系統図である。FIG. 1 is a system diagram showing an embodiment of the present invention.
【図２】図２は本発明で使用する噴射型原料供給機の一
例を示す一部を切欠いた側面図である。FIG. 2 is a partially cutaway side view showing an example of an injection type raw material feeder used in the present invention.
【図３】図３は図２の噴射型原料供給機の一部を切欠い
た平面図である。FIG. 3 is a plan view in which a part of the jet type raw material feeder of FIG. 2 is cut away.
【図４】図４は従来の噴射型原料供給機を示す一部を切
欠いた側面図である。FIG. 4 is a partially cutaway side view showing a conventional injection-type raw material feeder.
１ … 原料定量供給機 １ａ … 原料ホッパ １ｂ … テーブルフィーダ １ｃ … 振動フィーダ ２ … 噴射型原料供給機 ３ … 気流分級機 ３ａ、３ｂ、３ｃ … 分級産物出口 １０ … 粉体原料 １１ … 原料受け １２ … ノズル １３ … ディフユーザ １４ … 連結管 １５ … 粉体噴出管 １５ａ… 噴出口 １６ａ、１６ｂ … 気体導入用配管 １７ａ、１７ｂ … 電磁弁 １８ … 供給空気 １９ … 高速気流 1 ... Raw material quantitative feeder 1a ... Raw material hopper 1b ... Table feeder 1c ... Vibratory feeder 2 ... Jet type raw material feeder 3 ... Air flow classifier 3a, 3b, 3c ... Classified product outlet 10 ... Powder raw material 11 ... Raw material receiver 12 ... Nozzle 13 ... Diffuser 14 ... Connection pipe 15 ... Powder ejection pipe 15a ... Jet outlets 16a, 16b ... Gas introduction pipes 17a, 17b ... Solenoid valve 18 ... Supply air 19 ... High-speed air flow
Claims (2)
高速気流により搬送し下流側の噴出口から気流分級機へ
吹き込む工程と、前記管路の上流側から下流側に至る中
間部分に配設された気体導入手段により前記噴出口付近
の内壁へ向けて圧縮空気を間欠的に噴出し該部分に付着
した粉体を吹き落し除去する工程と、を含んでなる気流
分級機の粉体原料供給方法。1. A step of conveying a powder raw material by a high-speed air flow in a pipe of a jet type raw material feeder and blowing the powder raw material into an air flow classifier from an outlet on the downstream side, and an intermediate step from the upstream side to the downstream side of the pipe. A step of intermittently ejecting compressed air toward the inner wall in the vicinity of the ejection port by the gas introduction means arranged in the portion to blow off and remove the powder adhering to the portion. Powder raw material supply method.
し、下流側の噴出口から気流分級機へ吹き込む気流分級
機の粉体原料供給装置において、 前記管路の中間部分における対面する側壁に、中心線が
互いに交差しかつ前記噴出口付近の対面する内壁へ指向
するように配設した対をなす気体導入用配管と；これら
配管に配した電磁弁と；これら電磁弁を開閉させ、前記
配管により間欠的にかつ交互に圧縮空気を前記管路内へ
噴出させるタイマと；を有することを特徴とする、請求
項１に記載の方法を実施するための粉体原料供給装置。2. A powder raw material supply device for an air flow classifier, which conveys a powder raw material through a pipe line by a high-speed air stream and blows it into an air flow classifier from a jet outlet on the downstream side, facing each other at an intermediate portion of the pipe line. A pair of gas introduction pipes arranged on the side walls so that their center lines intersect with each other and directed to the facing inner wall near the ejection port; solenoid valves arranged on these pipes; and these solenoid valves opened and closed. And a timer for ejecting compressed air into the pipe intermittently and alternately by the pipe, the powder raw material supply device for carrying out the method according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3243157A JP2662117B2 (en) | 1991-09-24 | 1991-09-24 | Powder material supply method for airflow classifier and apparatus for implementing this method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3243157A JP2662117B2 (en) | 1991-09-24 | 1991-09-24 | Powder material supply method for airflow classifier and apparatus for implementing this method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0577934A true JPH0577934A (en) | 1993-03-30 |
| JP2662117B2 JP2662117B2 (en) | 1997-10-08 |
Family
ID=17099657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3243157A Expired - Fee Related JP2662117B2 (en) | 1991-09-24 | 1991-09-24 | Powder material supply method for airflow classifier and apparatus for implementing this method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2662117B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010091647A (en) * | 2008-10-06 | 2010-04-22 | Canon Inc | Toner manufacturing device and method for manufacturing toner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5756304A (en) * | 1980-08-07 | 1982-04-03 | Olin Mathieson | Manufacture of calcium hypochlorite |
| JPS5785725A (en) * | 1980-11-14 | 1982-05-28 | Mitsubishi Heavy Ind Ltd | Method of conveying powder by air |
| JPS6326046A (en) * | 1986-07-18 | 1988-02-03 | Nec Corp | Tdm frame synchronism establishment system |
-
1991
- 1991-09-24 JP JP3243157A patent/JP2662117B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5756304A (en) * | 1980-08-07 | 1982-04-03 | Olin Mathieson | Manufacture of calcium hypochlorite |
| JPS5785725A (en) * | 1980-11-14 | 1982-05-28 | Mitsubishi Heavy Ind Ltd | Method of conveying powder by air |
| JPS6326046A (en) * | 1986-07-18 | 1988-02-03 | Nec Corp | Tdm frame synchronism establishment system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010091647A (en) * | 2008-10-06 | 2010-04-22 | Canon Inc | Toner manufacturing device and method for manufacturing toner |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2662117B2 (en) | 1997-10-08 |
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