JP2000126568A - Method and apparatus for dispersing powder and apparatus for treating powder - Google Patents
Method and apparatus for dispersing powder and apparatus for treating powderInfo
- Publication number
- JP2000126568A JP2000126568A JP10307335A JP30733598A JP2000126568A JP 2000126568 A JP2000126568 A JP 2000126568A JP 10307335 A JP10307335 A JP 10307335A JP 30733598 A JP30733598 A JP 30733598A JP 2000126568 A JP2000126568 A JP 2000126568A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- flow
- dispersed
- gas
- dispersion
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
- B05B7/1404—Arrangements for supplying particulate material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/06—Jet mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/16—Arrangements for supplying liquids or other fluent material
- B05B5/1683—Arrangements for supplying liquids or other fluent material specially adapted for particulate materials
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、粉体の分級、混合、
荷電、計量、定量供給等のプロセシングの前処理に広く
適用される、凝集してクラスタ−をなしているバルク粉
体を有効に分散させることのできる、小型でエネルギ−
ないしは分散用気体消費の少ない粉体の分散処理方法、
及び分散処理装置、及びこれを利用することによって高
性能化された粉体処理装置を提供するものである。BACKGROUND OF THE INVENTION The present invention relates to the classification, mixing,
Widely applied to the pretreatment of processing such as charging, metering, and quantitative supply, it is a small and energy-efficient that can effectively disperse the aggregated and clustered bulk powder.
Or a method of dispersing powder with low gas consumption for dispersion,
And a dispersion processing apparatus, and a powder processing apparatus which is improved in performance by using the same.
【０００２】[0002]
【従来の技術】従来、バルク状粉体は、通常その仕様目
的に応じて所要粒度のバルクとして得られ、それを必要
に応じて使用する。しかし、粒径の小さい微粉や、特に
プラスチックなどの高電気抵抗微粉の場合には、バルク
状粉体は個別粒子の単純な集合体ではなく、個別粒子が
数個ないしは数十個程度静電気力などによって凝集して
できたクラスタ−として、バルク粉体を形成している場
合が多い。従って、例えば色の異なる２種のクラスタ−
集合粒体を、乾式で混合撹拌して調色をおこなう場合、
微細構造的に所要の均一混合を実現するためには、全体
の均一混合に必要な時間やエネルギ−以外に、クラスタ
−の解砕や分散に時間やエネルギ−が必要となり、時に
は、混合時間を長くとってもクラスタ−が解砕分散され
ず、微細構造的にみた所要の混合度が達成できない場合
もある。2. Description of the Related Art Conventionally, a bulk powder is usually obtained as a bulk having a required particle size according to its specification purpose, and it is used as needed. However, in the case of fine powder having a small particle size or high electrical resistance fine powder such as plastics, the bulk powder is not a simple aggregate of individual particles, but several or several tens of individual particles. In many cases, bulk powders are formed as clusters formed by aggregation. Therefore, for example, two types of clusters having different colors
When toning is performed by mixing and aggregating the aggregated granules in a dry system,
In order to achieve the required uniform mixing in terms of microstructure, in addition to the time and energy required for the entire uniform mixing, time and energy are required for disintegrating and dispersing the clusters. Even if it is long, the clusters are not disintegrated and dispersed, and the required degree of mixing in terms of microstructure may not be achieved in some cases.
【０００３】また、このようなクラスタ−を含む粉体を
管路に投入して空気搬送する場合、個別粒子に比較して
クラスタ−は、投入当初の加速に要するエネルギ−も、
一定速度に達した後に必要な搬送エネルギ−もはるかに
大きくなる。これは粉体を空気搬送する場合、粉体が搬
送気体から受ける力は粒径の２乗に比例するのに対し、
粒子の重量は粒径の３乗に比例し、個別粒子に比較して
クラスタ−の粒径は必ず大きくなっているので、粉体が
クラスタ−を形成している場合には、搬送エネルギ−が
大きくなってしまうからである。[0003] Further, when powder containing such clusters is charged into a pipeline and conveyed by air, compared to individual particles, the clusters require less energy for acceleration at the beginning of charging.
The required transport energy after reaching a certain speed is also much higher. This means that when powder is conveyed by air, the force that the powder receives from the carrier gas is proportional to the square of the particle size,
Since the weight of the particles is proportional to the cube of the particle size and the particle size of the cluster is always larger than that of the individual particles, when the powder forms a cluster, the transport energy is reduced. It is because it becomes large.
【０００４】この他、粉体の供給、分級、混合、荷電な
どの単位操作も、粉体がクラスタ−を形成していること
により色々な不利が生じ、また粉体の物性や流量の計測
にあたっては、測定結果が、粉体本来の個別粒子より
も、クラスタ−の形成状態に左右されるという不利な事
態が発生する。[0004] In addition, unit operations such as powder supply, classification, mixing, charging and the like have various disadvantages due to the formation of clusters in the powder, and in measuring the physical properties and flow rate of the powder. However, there is a disadvantage that the measurement result is more affected by the formation state of the clusters than the original individual particles of the powder.
【０００５】上述のようなバルク粉体がクラスタ−によ
って形成されている場合に、これを分散して、クラスタ
−に由来する色々な不利を工業的に解決して、粉体の供
給、輸送、混合、分級、荷電、計量などの粉体の乾式単
位操作の効率を有効に改善安定化する、小型、簡単でエ
ネルギ−消費量の少ない方法ないしは装置は知られてい
ない。なお、粉体の粒度分布の測定装置等において、ク
ラスタ−粉体を高圧気体で分散する方式及びこれを利用
した分級装置等は知られているが、これは分散それ自体
を目的とするもので、通常、大量の高圧空気等の消費
や、無用ないしは有害な粉体の加速等を伴い、それに続
く粉体の乾式単位操作の改善の目的に広く利用すること
が困難となる。また、粉体を大量の気体によって搬送し
て物体に衝突させ、または管内で旋回流によって分散を
はかる方法があるが、このような方式では融点の低い粉
体の場合には、高速気体の衝突や管壁との摩擦による温
度上昇のためにおこる溶融変質等により、かえって粒子
の粗大化や付着がおこったり、粉体が摩耗性の強い場合
には装置が摩耗したり、また、分散に使用する気体の圧
力や流量が多くなってしまう等の問題によって適用の範
囲は著しく限定される。[0005] When the above-mentioned bulk powder is formed by clusters, these are dispersed to solve various disadvantages derived from the clusters industrially to supply, transport, and supply the powder. There is no known small, simple and energy-saving method or device which effectively improves and stabilizes the efficiency of dry unit operations of powders such as mixing, classification, charging and metering. In the apparatus for measuring the particle size distribution of the powder, a method of dispersing the cluster powder with a high-pressure gas and a classifier using the same are known, but this is intended for the dispersion itself. Usually, this involves the consumption of a large amount of high-pressure air and the like, the acceleration of useless or harmful powder, and the like, which makes it difficult to widely use the powder for the purpose of improving the dry unit operation of the powder. In addition, there is a method in which powder is conveyed by a large amount of gas to collide with an object, or dispersion is performed by a swirling flow in a tube. Due to melting and alteration caused by temperature rise due to friction with the pipe and the wall of the tube, the particles may be coarsened or adhered, or if the powder is highly abrasive, the device may be worn or used for dispersion. The range of application is significantly limited by problems such as an increase in pressure and flow rate of the generated gas.
【０００６】[0006]
【発明が解決しようとする課題】主としてクラスタ−に
より成るバルク粉体を、連続的にクラスタ−を解砕分散
して、粉体の供給、輸送、混合、分級、荷電、計量など
の粉体の乾式単位操作工程に供給し、その効率や性能を
有効に改善する、小型、簡単で分散用気体ひいてはエネ
ルギ−消費量が少なく、無用ないしは有害な粉体の加速
等を伴わない応用範囲の広い乾式クラスタ−解砕分散前
処理方法、装置を実現することである。またこれを応用
し、粉体の単位操作と一体的に構成した粉体解砕・分散
処理装置、粉体処理方法及び装置を実現することであ
る。SUMMARY OF THE INVENTION Bulk powder mainly composed of clusters is continuously crushed and dispersed into clusters to supply, transport, mix, classify, charge, and measure powders. Dry type, which is supplied to the dry unit operation process and effectively improves its efficiency and performance, is a small, simple, dispersing gas, and thus has a low energy consumption, and has a wide application range without accelerating unnecessary or harmful powder. It is an object of the present invention to realize a cluster-crushing / dispersing pretreatment method and apparatus. It is another object of the present invention to realize a powder disintegration / dispersion processing apparatus, a powder processing method, and an apparatus integrally configured with a unit operation of powder by applying this.
【０００７】[0007]
【課題を解決するための手段】課題を解決するための第
一の手段は、粉体を処理装置に対して一定方向に移動す
る粉体流にすることであり、粉体は、粉体単独・気体流
動化粉体・気体搬送粉体の何れかの状態で粉体流を形成
する。The first means for solving the problem is to make the powder flow into a powder flowing in a certain direction with respect to the processing apparatus. A powder flow is formed in any state of the gas fluidized powder and the gas carrier powder.
【０００８】第二の手段は、該粉体流と交差する粉体流
より高速な高速薄層気体剪断層噴流を形成することであ
り、該気体流は、通常、粉体流を囲む管路の管壁から粉
体流に向かいほぼ垂直に偏平気体噴出口から吹き込ま
れ、粉体流中で交差衝突し強力な乱流を形成するように
構成し、該気体流が粉体流の断面すべてにわたって、少
なくとも一回以上存在するようにすることである。該気
体流は、偏平噴出口から噴出させこれを薄層化すること
によって気体流内部の粉体の分散に役立たないコア気流
の割合を少なくし、高速化してその両面にそってその接
線方向の流速が急激に変化している剪断層を形成する噴
流−高速薄層気体剪断層噴流−として粉体中のクラ
スタ−に有効に強力な剪断作用を及ぼすことによってこ
れを分散し、粉体の加速などに使われる割合を極少にす
ることができる。しかも気体流は薄層化されているので
その全量は少なくなり、装置のエネルギ−効率を極めて
高くするという大きな特徴を有する。しかも、分散気体
は粉体流中ではすべて交差衝突するので、粉体を特定の
方向に加速することがなく、保有するエネルギ−は高効
率でほとんど解砕分散のみに利用される。また、管壁や
ディフュ−ザ−等に吹きつけ、かえって付着や粒径の増
大をおこしたりすることがない。A second measure is to form a high-speed laminar gas shear layer jet that is faster than the powder stream that intersects the powder stream, the gas stream typically comprising a conduit surrounding the powder stream. The gas is blown almost vertically from the flat gas jet from the pipe wall toward the powder flow, cross-collises in the powder flow and forms a strong turbulent flow, and the gas flow is the entire cross section of the powder flow. Over at least once. The gas flow is ejected from a flat jet outlet to make the layer thinner, thereby reducing the ratio of the core air flow that does not contribute to the dispersion of the powder inside the gas flow, increasing the speed and increasing the speed in the tangential direction along both surfaces. A jet forming a shear layer having a rapidly changing flow velocity-a high-speed thin layer gas shear layer jet-effectively disperses this by exerting a powerful shearing action on clusters in the powder and accelerating the powder. The ratio used for such purposes can be minimized. In addition, since the gas flow is thinned, the total amount of the gas flow is reduced, which has a great feature that the energy efficiency of the apparatus is extremely increased. In addition, since all of the dispersed gas collide with each other in the powder flow, the powder is not accelerated in a specific direction, and the retained energy is used at high efficiency and almost exclusively for crushing and dispersion. In addition, it is not sprayed on the pipe wall, the diffuser, or the like, and does not cause the adhesion or increase of the particle size.
【０００９】粉体クラスタ−の分散に適用される高速薄
層気体剪断層噴流は、粉体流を囲む管路の管壁の偏平吹
込口から吹き込まれるので、管壁の吹込口に近いほどそ
の効果が高い。従って、粉体流を吹込口のある管壁付近
に誘導することにより、分散効果をより有効に発揮させ
る場合もある。The high-speed thin-layer gas shear layer jet applied to the dispersion of the powder clusters is blown from a flat blow hole in the pipe wall of the pipe surrounding the powder flow. High effect. Therefore, the dispersion effect may be more effectively exhibited by guiding the powder flow to the vicinity of the pipe wall having the blowing port.
【００１０】第三の手段は、上述の分散手段によってク
ラスタ−が分散されたあとで、これに適合するように粉
体の分散、混合、供給、輸送、荷電、計量などの粉体の
乾式単位操作、即ち分散粉体利用手段を設けることであ
る。The third means is that after the clusters are dispersed by the above-mentioned dispersing means, the dry units of the powders such as dispersion, mixing, supply, transport, charging, and metering of the powders are adapted to the dispersion. Operation, that is, to provide a means for utilizing the dispersed powder.
【００１１】[0011]
【作用】本発明の作用は、前記第一、第二の手段によ
り、粉体のクラスタ−が解砕分散され、実質的に言えば
粉体が微細化されることによって、第三の手段である粉
体の乾式単位操作の効率・有用性が向上し、しかも装置
の構造が極めて簡単、小型、安価であり、分散用気体乃
至は消費エネルギ−が少なく無用に加速されたりするこ
とが少ないので適用範囲が極めて広く、得られる利益は
極めて大きい。換言すれば、粉体が本来もっていた物性
を活用するための粒度微細化の効果が、最小の時間とエ
ネルギ−で、実現できるのである。The function of the present invention is as follows. The first and second means disperse and disperse the clusters of the powder, and, substantially speaking, make the powder finer. Since the efficiency and usefulness of the dry unit operation of a certain powder are improved, and the structure of the apparatus is extremely simple, small and inexpensive, the dispersing gas or energy consumption is small, and there is little needless acceleration. The scope is very wide and the benefits obtained are very large. In other words, the effect of reducing the particle size for utilizing the physical properties of the powder can be realized with minimum time and energy.
【００１２】具体的には、本発明により粉体のクラスタ
−が解砕分散されることによって微小化され、分散に使
用された気体が粉体粒子間に混在することによって、粉
体粒子の個別分離が更に進み、気体搬送による供給、輸
送における初期加速時間が短縮され、加速終了後の一定
搬送速度もクラスタ−の時より速くなり、結局、供給、
輸送に要するエネルギ−が節約される。Specifically, according to the present invention, the clusters of the powder are miniaturized by being crushed and dispersed, and the gas used for the dispersion is mixed between the powder particles, whereby the individual of the powder particles is separated. Separation is further advanced, the initial acceleration time in supply and transport by gas transport is shortened, and the constant transport speed after the end of acceleration is also faster than in the case of the cluster, eventually, supply,
Energy required for transportation is saved.
【００１３】また、粉体をクラスタ−の解砕分散により
粒子の個別分離が進んだ状態で分級装置に送入すれば、
分級効率が改善され、分級装置を小型化できると共に、
分散に要する動力の節減を実現することができる。Further, if the powder is sent to a classifier in a state where the individual separation of the particles has been advanced by the crushing and dispersion of the cluster,
Classification efficiency is improved and the classifier can be downsized.
It is possible to reduce the power required for dispersion.
【００１４】分級とは逆に、クラスタ−の解砕分散が終
わったあとで粉体を混合すれば、微細構造的にみた混合
が急速に進み、混合プロセスの効率向上が実現され混合
装置の小型化が実現できる。Contrary to the classification, if the powders are mixed after the crushing and dispersing of the clusters is completed, the mixing in terms of microstructure proceeds rapidly, the efficiency of the mixing process is improved, and the size of the mixing apparatus is reduced. Can be realized.
【００１５】本発明において、粉体のクラスタ−を解砕
分散したうえで、粉体を接触帯電による荷電装置（以下
接触荷電装置と略称する）に導入すると、粉体が本来も
っている表面積と個数が最大になった状態となり、粉体
と接触荷電装置との接触面積と接触回数の両方が最大と
なるとともに、帯電可能な粉体粒子の表面積も最大とな
るので、これらの総合効果により、接触荷電装置の効率
が最大となり、これによって得られる荷電粉体の単位重
量宛の荷電量即ち比電荷Ｑ／Ｍ（マイクロク−ロン／グ
ラム＝μｃ／ｇ）が著しく改善される。In the present invention, after the powder clusters are crushed and dispersed, the powder is introduced into a charging device by contact charging (hereinafter abbreviated as contact charging device). Is maximized, and both the contact area and the number of times of contact between the powder and the contact charging device are maximized, and the surface area of the chargeable powder particles is also maximized. The efficiency of the charging device is maximized, thereby significantly improving the amount of charge per unit weight of the obtained charged powder, that is, the specific charge Q / M (microclones / gram = μc / g).
【００１６】本発明において、分散粉体利用手段として
コロナ放電による粉体荷電装置（以下コロナ荷電装置と
略称する）を適用する場合には、クラスタ−の分散によ
って粉体の帯電可能な表面積が増加することにより帯電
効率が改善されるのと併せて、高速薄層気体剪断層噴流
によってクラスタ−を解砕分散すると同時に、分散され
た粉体をコロナ放電電極に接近した電界強度が強く電流
密度の高い空間に向かって吹き寄せることによっても、
帯電効率の改善がもたらされる。その理由は、粉体の単
位表面積あたりの最終荷電密度は、荷電が行われる空間
の電界強度に比例するからである。In the present invention, when a powder charging device by corona discharge (hereinafter abbreviated as corona charging device) is applied as a means for utilizing the dispersed powder, the surface area where the powder can be charged increases due to the dispersion of the clusters. In addition to improving the charging efficiency, the cluster is disintegrated and dispersed by a high-speed thin layer gas shear layer jet, and at the same time, the dispersed powder approaches the corona discharge electrode, and the electric field strength is strong and the current density is reduced. By blowing towards a high space,
This results in improved charging efficiency. The reason is that the final charge density per unit surface area of the powder is proportional to the electric field strength in the space where charging is performed.
【００１７】本発明において、比較的低速の粉体を、そ
のクラスタ−を一定流量の気体によって解砕分散した直
後に、生成した個別粉体と気体より成る二相流を細管路
に導入し、この細管路の断面積が、その細管路において
粉体が均一混合状態をなすようになし、その細管路の出
口において粉体が気体流と実質上同一速度近くまで加速
されるように細管路の長さを設定すると、気体の運動エ
ネルギ−が加速された粉体の運動エネルギ−に変換され
ることによって、この細管路の入口と出口における気体
の圧力差は、この管路を流れる粉体の質量流量に比例す
るようにすることができる。従って、この圧力差が所要
設定値と一致するように粉体供給量を自動制御する事に
よって、粉体定量供給装置を実現することができ、構造
が極めて簡単で安価である上に、内部に粉体が滞留する
ことがなく内部の清掃が容易であるので、粉体の流量計
測・定量供給手段として極めて有用である。In the present invention, the two-phase flow composed of the individual powder and the gas generated is introduced into the narrow tube immediately after the relatively low-speed powder is crushed and dispersed by a gas at a constant flow rate. The cross-sectional area of the capillary is such that the powder is homogeneously mixed in the capillary, and at the outlet of the capillary the powder is accelerated to near the same velocity as the gas flow. When the length is set, the kinetic energy of the gas is converted into the kinetic energy of the accelerated powder, so that the pressure difference between the gas at the inlet and the outlet of the narrow pipe causes the powder flowing through the pipe to flow. It can be proportional to the mass flow. Therefore, by automatically controlling the powder supply amount so that this pressure difference matches the required set value, a powder quantitative supply device can be realized, the structure is extremely simple and inexpensive, and the internal Since the inside is easy to clean without the powder staying therein, it is extremely useful as a flow rate measuring and quantitative supply means for the powder.
【００１８】ただ単に、粉体に気体を混合して管路を流
したときに発生する差圧を測定しても、本発明による高
速薄層気体による分散手段がない場合には、発生する差
圧が、粉体の物性やクラスタ−の存在状況に著しく影響
されるうえに、加速に要する管路が著しく長くなるの
で、粉体の流量の計測や定量供給手段として利用するこ
とは困難である。Even if the pressure difference generated when a gas is mixed with a powder and flows through a pipe is measured, if the dispersion means by the high-speed thin-layer gas according to the present invention is not provided, the pressure difference generated is measured. Since the pressure is significantly affected by the physical properties of the powder and the presence of clusters, and the length of the pipeline required for acceleration is significantly long, it is difficult to use the powder as a means for measuring the flow rate of the powder or for quantitatively supplying the powder. .
【００１９】本発明による定量供給装置最大の特徴は、
粉体供給量が所定値に自動制御されているとともに、そ
の出口において粉体が個別粒子にまで解砕・分散されて
いるという、二つの条件が同時に達成されているという
ことである。従って、分級・混合・荷電などの粉体単位
操作に、本発明による定量供給装置を適用した場合に
は、単位操作の最高処理能力が得られる供給量または所
要供給量における定量供給運転による運転の安定化と、
装置の小型化更に粉体が個別粒子にまで解砕・分散され
ていることの相乗効果によって、それぞれの単位操作の
性能が著しく向上するという作用がもたらされ、このよ
うにして高性能化された単位操作全体が本発明そのもの
となるのである。The most important feature of the quantitative supply device according to the present invention is that
This means that the two conditions that the powder supply amount is automatically controlled to a predetermined value and the powder is crushed and dispersed into individual particles at the outlet thereof are simultaneously satisfied. Therefore, when the quantitative supply device according to the present invention is applied to the powder unit operation such as classification, mixing, and charging, the operation by the quantitative supply operation at the supply amount or the required supply amount at which the maximum processing capacity of the unit operation is obtained. Stabilization,
The synergistic effect of the downsizing of the device and the fact that the powder is crushed and dispersed into individual particles has the effect of significantly improving the performance of each unit operation, thus increasing the performance. The entire unit operation becomes the present invention itself.
【００２０】分級・混合・荷電などの粉体単位操作は、
装置の大型化に伴ってその効率が低下する場合が多い。
しかし、本発明による定量供給装置はその構造が極めて
簡単で小型・廉価であるので、多数の供給装置を一つの
単位操作に適用して粉体を分割供給することによって単
位操作全体の高性能化を達成できる場合が多く、このよ
うにして構成された単位操作自体も本発明を構成するも
のである。The operation of the powder unit such as classification, mixing, charging, etc. is as follows.
In many cases, the efficiency of the device decreases as the size of the device increases.
However, since the quantitative supply device according to the present invention has a very simple structure and is small and inexpensive, it is possible to improve the performance of the entire unit operation by applying a large number of supply devices to one unit operation and dividing and supplying the powder. Can be achieved in many cases, and the unit operation itself configured in this way also constitutes the present invention.
【００２１】[0021]
【発明の実施の形態】本発明による粉体分散処理装置の
実施の一例を図１及び図２に示した。図１は本発明の基
本的構成の一例で、粉体流形成手段１、高速薄層気体剪
断層噴流によって粉体を分散する粉体分散手段２の図２
におけるＢ−Ｂ断面図、分散粉体利用手段３より成り、
図２は図１の粉体分散手段２のＡ−Ａ断面図である。1 and 2 show an embodiment of a powder dispersing apparatus according to the present invention. FIG. 1 shows an example of a basic structure of the present invention. FIG. 2 shows a powder flow forming means 1 and a powder dispersing means 2 for dispersing powder by a high-speed thin layer gas shear layer jet.
BB cross-sectional view, comprising the dispersed powder utilization means 3,
FIG. 2 is a sectional view taken along the line AA of the powder dispersing means 2 of FIG.
【００２２】図１において、粉体は粉体タンク１５内で
多孔板１７を通って吹き込まれる流動化気体１８によっ
て流動化粉体１６となり、管路１９を通って粉体流４と
なって、粉体分散手段２に供給される。図１、図２にお
いて、分散用気体５は、一旦粉体分散手段２の共通流路
１４に入った後、中心の粉体流４に向かう複数の偏平流
路６によって、高速薄層気体剪断層噴流７となって偏平
噴出口８より粉体流４に吹き込まれて、その強力な剪断
作用によって、粉体流４に含まれるクラスタ−を個別粒
子に分散させる。そのとき分散に使用された気体は、分
散の結果生成した微粉粒子間に混在して個別分離を進
め、分散粉体２０となる。なお図１においては、粉体分
散手段は粉体流４に沿って２段に適用する場合を示して
ある。In FIG. 1, the powder becomes fluidized powder 16 by a fluidizing gas 18 blown through a perforated plate 17 in a powder tank 15, and becomes a powder flow 4 through a pipe 19. The powder is supplied to the powder dispersing means 2. 1 and 2, the dispersion gas 5 once enters the common flow path 14 of the powder dispersing means 2 and is then subjected to high-speed thin layer gas shearing by a plurality of flat flow paths 6 toward the central powder flow 4. The laminar jet 7 is blown into the powder stream 4 from the flat jet port 8, and the strong shearing action disperses the clusters contained in the powder stream 4 into individual particles. The gas used for the dispersion at that time is mixed between the fine powder particles generated as a result of the dispersion and promotes the individual separation to form the dispersed powder 20. FIG. 1 shows a case where the powder dispersing means is applied in two stages along the powder stream 4.
【００２３】図１、図２において、分散用気体５は流量
設定手段９によって、設定値１０が与えられ、高速薄層
気体剪断層噴流７は偏平流路６の流体抵抗によって均等
に分配され、各噴出口８の吹込速度は常に均等に所定値
に維持される。同時に、図２より明かなように、高速薄
層気体剪断層噴流７は、粉体流４に対してその断面全体
にわたって存在するので、分散作用が粉体流４の細部に
わたって必ずおこなわれ、しかも気体流同志のみが粉体
流４の中で衝突し、決して管路やディフュ−ザ−等の個
体に向かって粉体を吹き付けたり旋回流による遠心力に
よって管路の内壁に押しつけたりすることがない。従っ
て、低融点粉体における衝突溶着や、強度の弱い粉体の
破壊、装置の摩耗、付着層の生成などの問題を起こすこ
とがない。1 and 2, the dispersion gas 5 is given a set value 10 by the flow rate setting means 9, and the high-speed thin layer gas shear layer jet 7 is evenly distributed by the fluid resistance of the flat flow path 6. The blowing speed of each jet port 8 is always uniformly maintained at a predetermined value. At the same time, as is clear from FIG. 2, the high-speed laminar gas shear layer jet 7 exists over the entire cross section of the powder stream 4, so that the dispersing action always takes place over the details of the powder stream 4. Only the gas streams collide in the powder stream 4 and never blow the powder toward the individual such as a pipe or a diffuser or press the powder against the inner wall of the pipe by the centrifugal force of the swirling flow. Absent. Therefore, there is no problem such as collision welding of the low melting point powder, destruction of the powder having low strength, wear of the device, and formation of the adhesion layer.
【００２４】図１、図２において、偏平流路６の厚みは
0.1〜1ｍｍ程度が通常適用され、気体流が極めて薄い
ので、気体流の内部の粉体の分散に有効に作用しないコ
ア気体流の割合が少なく、剪断が気体流の両面で有効に
おこなわれるので、クラスタ−に対し大きな解砕分散剪
断力が得られる。従って、各出口８における吹込速度は
25〜100ｍ／秒程度と、それ程大きくとる必要がない場
合が多く、所要空気量も少なく、例えば、気体に対する
粉体の重量混合比Γにして20〜10程度と少なくてす
む。、また、機械的構造が簡単で摩耗する部分がないの
で、テフロン（登録商標）や高密度ポリエチレンなどの
非付着性材料で装置を作ることができ、調整を必要とす
る部分がなく、小型な装置であるので、大容量を必要と
する場合には並列に複数個の装置を適用することによっ
て、性能を落とさずに要求を満足させることができる。1 and 2, the flat channel 6 has a thickness of
Since about 0.1 to 1 mm is usually applied and the gas flow is extremely thin, the proportion of the core gas flow that does not effectively act on the dispersion of the powder inside the gas flow is small, and the shearing is effectively performed on both sides of the gas flow. , A large crushing dispersion shear force is obtained for the cluster. Therefore, the blowing speed at each outlet 8 is
In many cases, it is not necessary to take such a large value as about 25 to 100 m / sec, and the required amount of air is small. For example, the weight mixing ratio Γ of powder to gas can be as small as about 20 to 10. Also, since the mechanical structure is simple and there are no wear parts, the device can be made of a non-adhesive material such as Teflon (registered trademark) or high-density polyethylene. Since the device is a device, if a large capacity is required, a plurality of devices can be applied in parallel to satisfy the requirement without deteriorating the performance.
【００２５】本発明による粉体分散手段は、粉体流と交
差する高速薄層気体剪断層噴流を利用することによって
前述のように分散用気体の使用量を少なくすることがで
きるので、得られる分散粉体２０の含気量を小さくする
ことができ、粉体を無駄に加速したりすることがないよ
うにすることができる。従って、これを分散粒体利用手
段３で処理する場合に、分散粉体利用手段３の仕様や運
転条件の自由度を大きくすることが容易であり、これに
よって粉体流形成手段１、粉体分散手段２、分散粉体利
用手段３を総合して得られる本発明による粉体分散処理
装置の高性能小型低コスト化が実現されるのである。The powder dispersing means according to the present invention can be obtained because the amount of the dispersing gas used can be reduced as described above by utilizing the high-speed thin layer gas shear layer jet which intersects the powder flow. The air content of the dispersed powder 20 can be reduced, and the powder can be prevented from being unnecessarily accelerated. Therefore, when this is treated by the dispersed particle utilizing means 3, it is easy to increase the degree of freedom of the specifications and operating conditions of the dispersed powder utilizing means 3, whereby the powder flow forming means 1, powder The high performance, small size, and low cost of the powder dispersion processing apparatus according to the present invention, which is obtained by combining the dispersion means 2 and the dispersed powder utilization means 3, are realized.
【００２６】図１において、分散粉体利用手段として
は、サイクロンや回転式の遠心力分級機２２を適用する
場合の実施例であり、通常、分散媒体として大量の分級
空気１１が導入され、粗粉１３と、微粉分離手段１２を
介して微粉２１が得られる。図１、図２に示した本発明
による粉体分級装置においては、分級機２２に入ってく
る粉体が、粉体分散手段２によって独立粒子にまで分散
されているので、通常の分級機に要求される分散と分級
の二つの作用のうち分散の作用が不要となるので、分級
機の処理能力、特に微粉の分離効率が改善される。また
粉体分散手段３で使用される分散用気体５の量が著しく
少ないので、分級機２２に導入される分級空気１１と分
散用気体の合量が少なくてすみ、分級のために発生させ
る所要の遠心力を得るために必要な分級機の内径を小さ
くすることができ、分級機の小型化が可能となる。FIG. 1 shows an embodiment in which a cyclone or a rotary centrifugal classifier 22 is applied as a means for utilizing the dispersed powder. Usually, a large amount of classified air 11 is introduced as a dispersion medium, and Fine powder 21 is obtained via the fine powder 13 and the fine powder separating means 12. In the powder classifier according to the present invention shown in FIGS. 1 and 2, the powder entering the classifier 22 is dispersed into independent particles by the powder dispersing means 2. Since the dispersing function of the two required functions of dispersing and classifying is not required, the processing capacity of the classifier, particularly the efficiency of separating fine powder, is improved. Further, since the amount of the dispersing gas 5 used in the powder dispersing means 3 is extremely small, the total amount of the classifying air 11 and the dispersing gas introduced into the classifier 22 can be small, and the amount of the gas generated for the classification is required. The inner diameter of the classifier required to obtain the centrifugal force can be reduced, and the size of the classifier can be reduced.
【００２７】図１、図２に示した本発明の実施例におい
て、バルブ２３は粉体流４の流量調節手段の一例であっ
て、流動化気体１８を一定流量で供給しておいて、バル
ブ２３を調節することによって粉体タンク１５の内圧を
調節し、これによって粉体流４の流量を所定値に保持す
るやり方を示したものである。粉体流４の流量調節手段
は、図１、図２の粉体分散手段２の下流に図には示して
ないエゼクタ等の吸引手段を設けることによってこれを
実施することもできる。また、粉体タンクの引出機にス
クリュ−フィ−ダ、ロ−タリ−フィ−ダ、振動フィ−ダ
等の主としてバルク粉体に好適な供給装置を適用し粉体
流４の形成を実施することもでき、これらの場合には、
粉体流４は図１に示した流動化した含気粉体流だけに限
定されるものではなく、バルク粉体をそのまま粉体流と
して供給する場合も本発明の実施例に含まれる。In the embodiment of the present invention shown in FIG. 1 and FIG. 2, the valve 23 is an example of a flow rate adjusting means for the powder stream 4, and supplies the fluidizing gas 18 at a constant flow rate. 23 shows a manner in which the internal pressure of the powder tank 15 is adjusted by adjusting the number 23 and thereby the flow rate of the powder stream 4 is maintained at a predetermined value. The flow rate adjusting means of the powder stream 4 may be implemented by providing a suction means such as an ejector (not shown) downstream of the powder dispersing means 2 in FIGS. Further, a supply device mainly suitable for bulk powder, such as a screw feeder, a rotary feeder, and a vibration feeder, is applied to the drawing machine of the powder tank to form the powder stream 4. You can also in these cases,
The powder stream 4 is not limited to the fluidized aerated powder stream shown in FIG. 1, and the case where bulk powder is supplied as it is as a powder stream is also included in the embodiment of the present invention.
【００２８】図３に示したのは、本発明による混合装置
の実施例であって、粉体タンク１５−１中の粉体１６−
１と、粉体タンク１５−２中の粉体１６−２とを、図
１、図２に示した本発明による分散手段２−１，２−２
を適用し、分散用気体５−１，５−２によって粉体中の
クラスタ−を個別粒子にまで分散した分散粉体２０−
１，２０−２となし、これを混合機２５に送入する。本
発明によってこのようなシステムを構成すると、混合機
に入ってくる粉体は、従来の混合機の混合プロセスを構
成する分散作用と混ぜ合わせ作用との二つの作用の内の
分散作用が終了し、しかも小量のそれぞれの分散用気体
に懸濁した状態となっているので、混ぜ合わせ作用が極
めて容易で短時間に終了し、小型の混合機で、微細構造
的にみて均一な混合粉体２６を得ることができる。な
お、混合粉体に含まれる分散用気体は必要に応じて、分
散に使用された気体５−１，５−２を分離するために、
矢印２７に示した如く排気を適用する場合もある。FIG. 3 shows an embodiment of the mixing apparatus according to the present invention.
1 and the powder 16-2 in the powder tank 15-2 by the dispersing means 2-1 and 2-2 according to the present invention shown in FIGS.
And dispersed particles 20- in which clusters in the powder are dispersed into individual particles by dispersion gases 5-1 and 5-2.
1, 20-2, which are sent to the mixer 25. When such a system is configured according to the present invention, the powder entering the mixer ends the dispersing action of the dispersing action and the mixing action which constitute the mixing process of the conventional mixer. In addition, since they are suspended in a small amount of each dispersing gas, the mixing action is extremely easy and can be completed in a short time. 26 can be obtained. In addition, the gas for dispersion contained in the mixed powder, if necessary, to separate the gases 5-1 and 5-2 used for dispersion,
Exhaust may be applied as shown by arrow 27.
【００２９】図３に示した本発明による混合装置におい
ては、図に示してないそれぞれの粉体の定量供給手段を
適用して、それぞれの粉体の供給流量比率を一定に保つ
ことは容易であるので、混合機２５は連続型を適用する
ことによって、正確な混合比、微細構造的な混合状態を
同時に達成できる小形大容量の高性能混合装置を容易に
実現することができる。In the mixing apparatus according to the present invention shown in FIG. 3, it is easy to maintain a constant supply flow ratio of each powder by applying a quantitative supply means for each powder not shown. Therefore, by using a continuous type as the mixer 25, it is possible to easily realize a small-sized, large-capacity high-performance mixing apparatus capable of simultaneously achieving an accurate mixing ratio and a microstructured mixing state.
【００３０】図４に示したのは、本発明による粉体の接
触帯電装置の実施例であって、粉体分散手段２の構成要
素は図１、図２と共通の番号を付してある。図４におい
て、粉体流４は、粉体分散手段２の管壁から、偏平流路
６を通って吹き込まれる高速薄層気体剪断層噴流７によ
って、そのクラスタ−が解砕分散され単独粒子分散粉体
２０となり、粉体が本来もっている最大の表面積と個数
の状態となり、この状態で下流の外管３４と内管３５の
間に形成されている多段拡縮円環路３６を通過させるこ
とによる接触帯電装置２８における粉体粒子が内管３
５、外管３４と接触する回数が最大となり、その結果、
粉体が獲得した電荷が保持される粉体表面積の合計は最
大となり、結局、帯電粉体３７の単位重量宛の電荷量即
ち比電荷Ｑ／ｍが最大となって、最大の接触帯電効率が
得られることになる。FIG. 4 shows an embodiment of the contact charging device for powder according to the present invention. The components of the powder dispersing means 2 are denoted by the same reference numerals as those in FIGS. . In FIG. 4, the cluster of the powder stream 4 is disintegrated and dispersed by a high-speed thin-layer gas shear layer jet 7 blown from the pipe wall of the powder dispersing means 2 through the flat flow path 6 to disperse the single particles. The powder 20 becomes the state of the maximum surface area and the number of the powder originally, and in this state, the powder 20 is passed through the multistage expanding / contracting circular path 36 formed between the outer pipe 34 and the inner pipe 35 on the downstream side. The powder particles in the contact charging device 28
5. The number of times of contact with the outer tube 34 is maximized, and as a result,
The total surface area of the powder holding the charge obtained by the powder becomes the maximum, and eventually the charge amount per unit weight of the charged powder 37, that is, the specific charge Q / m becomes the maximum, and the maximum contact charging efficiency is increased. Will be obtained.
【００３１】通常の接触帯電による荷電装置において
は、図４における３４、３５、３６の如く荷電がおこな
われる荷電部まで粉体を搬送するために必要な気体の量
は、荷電部で必要とされる空気量の半分程度の場合が多
いので、通常荷電部の直前で、必要な空気を加速部の軸
方向或いは旋回流として吹き込まれる。しかしこれらの
在来の方式は、粉体のクラスタ−解砕分散には、ほとん
ど効果がない。本発明では、この荷電部直前の添加空気
を直前の内壁より高速薄層気体剪断層噴流として粉体流
４を交差剪断することにより分散個別粉体に分散させ、
しかもこの吹込空気は結局は粉体を加速するのに使われ
るので、粉体がよく分散された状態で荷電部に入ってこ
れを通過することにより、最大の接触帯電効率が得られ
るのである。In an ordinary charging device by contact charging, the amount of gas necessary for transporting the powder to the charged portion, such as 34, 35 and 36 in FIG. 4, is required by the charged portion. In most cases, the required air is blown in the axial direction of the accelerating unit or as a swirling flow immediately before the charging unit, because the amount of air is often about half of that of the charged unit. However, these conventional approaches have little effect on cluster-disintegration dispersion of powders. In the present invention, the added air immediately before the charged portion is dispersed into discrete individual powders by cross-shearing the powder stream 4 as a high-speed thin layer gas shear layer jet from the immediately preceding inner wall,
Moreover, since the blown air is eventually used to accelerate the powder, the powder enters the charged portion in a well-dispersed state and passes through the charged portion, so that the maximum contact charging efficiency can be obtained.
【００３２】本発明による粉体の接触帯電装置において
は、使用される粉体の静電気工学的物性や搬送管路の材
質や搬送速度等によって異なるが、粉体分散手段２と荷
電部３４、３５、３６との間の接続管路３８はなるべく
短い方が好ましい。管路３８が長いと、一度分散された
粉体粒子の静電気等による再結合が起こって、粉体分散
手段２の効果が減殺されることがあるからである。In the contact charging device for powder according to the present invention, the powder dispersing means 2 and the charging units 34 and 35 vary depending on the electrostatic engineering properties of the powder used, the material of the transfer pipe, the transfer speed, and the like. , 36 is preferably as short as possible. If the pipe 38 is long, the powder particles once dispersed may be recombined due to static electricity or the like, and the effect of the powder dispersion means 2 may be reduced.
【００３３】本発明による粉体の接触帯電装置に適用さ
れる荷電部は、図４においては、対象粉体に対する荷電
能力が高く、付着性のない材質でできた外管３４、内管
３５の間に形成された多段拡縮円環路方式を示した。し
かし、適用できる荷電部はこの方式だけに限定されるも
のではなく、よく知られた細管路、旋回流円管路等、種
々の荷電部を利用することができる。In FIG. 4, the charging section applied to the contact charging device for powder according to the present invention has a high charging capability for the target powder and has an outer tube 34 and an inner tube 35 made of a non-adhesive material. The multi-stage expansion / contraction ring system formed between them is shown. However, applicable charging units are not limited to this method, and various types of charging units such as well-known narrow pipes and swirling circular pipes can be used.
【００３４】図５に示したのは、本発明による粉体のコ
ロナ放電荷電装置の実施例であって、粉体分散手段２の
構成要素は、図１、図２と共通の番号を付してある。図
５において、気体によって搬送される粉体流４は、粉体
分散手段２の管壁から、偏平流路６を通って吹き込まれ
る高速薄層気体剪断層噴流７によって、そのクラスタ−
が解砕分散され単独粒子分散粉体２０となり、粉体が本
来もっている最大の表面積と個数をもった状態となる。
このようにして生成した分散粉体２０は、その下流に設
けられた尖端に高電圧電源３２によって高電圧を印加し
たコロナ放電電極３１を有するそらせコ−ン３０より成
るコロナ帯電装置２９により、コロナ放電によって帯電
粉体３７となって吐出される。図５において、そらせコ
−ン３０などの散布荷電手段に到達する単独粒子にまで
分散した分散粉体２０は、最高の微粒化状態となってい
るので、接触帯電の場合と同様に、得られる帯電粉体３
７の比電荷Ｑ／ｍは、粉体分散手段２がない場合に比較
して、著しく向上する。FIG. 5 shows an embodiment of the powder corona discharge device according to the present invention. The components of the powder dispersing means 2 are assigned the same reference numerals as those in FIGS. It is. In FIG. 5, a powder stream 4 carried by a gas is clustered by a high-speed thin layer gas shear layer jet 7 blown from a pipe wall of the powder dispersing means 2 through a flat channel 6.
Is disintegrated and dispersed to form a single-particle-dispersed powder 20, which has the maximum surface area and number inherent in the powder.
The dispersion powder 20 thus formed is corona-charged by a corona charging device 29 comprising a deflector cone 30 having a corona discharge electrode 31 to which a high voltage is applied by a high-voltage power supply 32 at a point provided downstream thereof. It is discharged as the charged powder 37 by the discharge. In FIG. 5, the dispersed powder 20 dispersed to the single particles reaching the scattered charging means such as the deflecting cone 30 is in the highest atomized state and can be obtained in the same manner as in the case of contact charging. Charged powder 3
The specific charge Q / m of No. 7 is remarkably improved as compared with the case where the powder dispersing means 2 is not provided.
【００３５】図５に示した本発明の実施例において、粉
体分散手段２と、コロナ帯電装置２９との間の接続管路
３８は、なるべく短い方が望ましいが、これは粉体の種
類、搬送空気量、搬送速度等によって異なり、一旦分散
した粉体の静電気等の原因によって再結合してクラスタ
−を形成する場合があるからである。In the embodiment of the present invention shown in FIG. 5, the connecting pipe 38 between the powder dispersing means 2 and the corona charging device 29 is desirably as short as possible. This is because, depending on the amount of air to be conveyed, the speed of conveyance, and the like, the powders once dispersed may be recombined to form clusters due to static electricity or the like.
【００３６】本発明による分散装置２を適用しないクラ
スタ−を多く含む粉体は、嵩比重が大きく、そらせコ−
ン３０等の搬布手段によって得られる吐出パタ−ンが広
がりにくくハ−ドになり、よく帯電した比電荷Ｑ／ｍの
大きい帯電帯電粉体を得ることができない。The powder containing many clusters to which the dispersing device 2 according to the present invention is not applied has a large bulk specific gravity,
The discharge pattern obtained by the conveying means such as the mask 30 is hard to spread, and hardened, making it impossible to obtain a well-charged charged powder having a large specific charge Q / m.
【００３７】図６に示したのは、本発明による粉体のコ
ロナ放電荷電装置の別の実施例であって、粉体分散手段
２の構成要素は、図１、図２と共通の番号を付してあ
る。図６において、気体によって搬送される粉体流４
は、粉体分散手段２の管壁から、偏平流路６を通って吹
き込まれる高速薄層気体剪断層噴流７によって、そのク
ラスタ−が解砕分散される。この場合粉体流４は、そら
せコ−ン３０によって管路１９に近接したりリング状に
なって、高速薄層気体剪断層噴流７の噴出口８に接近し
て通過するので、クラスタ−の解砕分散がより強く行わ
れる。更に、噴出口８の中心にコロナ放電用のコロナ放
電電極３１が位置するようになっているので、分散粉体
が電極に向かって吹き寄せられ、粉体の荷電が、コロナ
放電電界が最も強い電極の尖端付近で行われる。電界中
におけるコロナ放電によるイオン衝突による到達最高電
荷密度は、電界強度に比例するので、図６に示した実施
例においては、粉体流４を高速薄層気体剪断層噴流７の
偏平噴出口８の付近に誘導する粉体誘導手段、即ちそら
せコ−ン３０の作用と、分散粉体２０がコロナ放電の針
電極の付近に吹き寄せられ、強電界による荷電がおこな
われることとの両方の効果によって、ノズル３３より噴
出する帯電粉体の比電荷Ｑ／ｍを高くすることが可能に
なる。FIG. 6 shows another embodiment of the powder corona discharge device according to the present invention. The components of the powder dispersing means 2 have the same reference numerals as those in FIGS. It is attached. In FIG. 6, the powder flow 4 carried by the gas
The clusters are disintegrated and dispersed by a high-speed thin layer gas shear layer jet 7 blown from the pipe wall of the powder dispersing means 2 through the flat flow path 6. In this case, the powder stream 4 approaches the pipe line 19 or forms a ring shape by the deflecting cone 30 and passes close to the jet port 8 of the high-speed thin layer gas shear layer jet stream 7, so that the cluster flow Disintegration and dispersion are performed more strongly. Further, since the corona discharge electrode 31 for corona discharge is located at the center of the jet port 8, the dispersed powder is blown toward the electrode, and the powder is charged, and the corona discharge electric field is the strongest. Near the tip of the Since the maximum charge density reached by ion collision by corona discharge in an electric field is proportional to the electric field intensity, in the embodiment shown in FIG. And the dispersion powder 20 is blown into the vicinity of the needle electrode of corona discharge, and is charged by a strong electric field. Thus, the specific charge Q / m of the charged powder ejected from the nozzle 33 can be increased.
【００３８】図６におけるそらせコ−ン３０は、粉体流
４を高速薄層気体剪断層噴流７の偏平噴出口８の付近に
誘導することによって、クラスタ−の解砕分散に有効な
場合が多く、図１、２、３、４、５等の実施例において
も、図６と同様に粉体分散手段２に近接した上流に同心
状に設置するのが有効であり、粉体と気体の物質バラン
ス上可能であれば、同様の目的に気体の旋回流を単独ま
たはそらせコ−ンと併用してもよい。The deflecting cone 30 shown in FIG. 6 is effective for disintegrating and dispersing clusters by guiding the powder stream 4 to the vicinity of the flat jet port 8 of the high-speed thin-layer gas shear layer jet 7. 1, 2, 3, 4, 5 and the like, it is effective to install concentrically upstream near the powder dispersing means 2 as in FIG. If possible in terms of material balance, a swirling flow of gas may be used alone or in combination with a deflecting cone for the same purpose.
【００３９】図７に示したのは、本発明による粉体流量
計測装置及びこれを利用した粉体定量供給装置の実施例
であって、粉体分散手段２の構成要素は、図１、図２と
共通の番号を付してある。図７において、流動化粉体流
４は、粉体分散手段２によってクラスタ−が解砕分散さ
れ、管路１９と同径程度の短い接続管路３８を通り、細
管３９を経て出口側接続管路３８に至るようになってお
り、細管３９の入口と出口の気体の圧力差を、差圧セン
サ４０によって検出する。FIG. 7 shows an embodiment of the powder flow rate measuring device and the powder quantitative supply device using the same according to the present invention. The components of the powder dispersing means 2 are shown in FIGS. The same number as 2 is assigned. In FIG. 7, the fluidized powder stream 4 has the clusters crushed and dispersed by the powder dispersing means 2, passes through a short connecting pipe 38 having the same diameter as the pipe 19, passes through a thin pipe 39, and connects to an outlet side connecting pipe The pressure difference between the gas at the inlet and the outlet of the thin tube 39 is detected by a differential pressure sensor 40.
【００４０】図７の実施例において、粉体分散手段２直
後の接続管路３８と細管３９の断面積比を、接続管路３
８中の粉体速度に対して細管３９中の分散用気体５の速
度が５倍程度以上になるようにすると、粉体４は細管路
３９の中で急速に加速され、これに要する仕事によっ
て、細管３９の入口と出口における気体に圧力差が発生
する。このとき粉体４は、分散手段２によってクラスタ
−が個別粒子にまで解砕分散され、最も加速され易い状
態になっており、例えば、300μ 以下の微細なプラス
チック粉体や、10μ以下のセラミック粉体等の場合で
は、細管３９の長さ数十ミリ程度で、細管３９の出口に
おける気体と粉体の速度を等しくすることができ、この
場合には、細管３９を通過する粉体の質量流量５４と差
圧センサ４０の出力との間には、図８に示したような安
定な比例関係が成立し、その比例係数が粉体の真比重、
嵩比重、粒度分布、電気抵抗、誘電率等の特性に影響さ
れることがほとんどない。この場合、分散用気体５は、
流量設定手段９によって設定値１０の一定値に保持する
ことが必要であるが、これは加圧した分散用気体を周知
の定圧弁によって定圧とし、これを高抵抗弁等の固定流
体抵抗を通す等の手段によって容易に実施でき、差圧セ
ンサ４０の出力を粉体質量流量信号５４として使用する
ことができる。細管３９前後の粉体を含む気体の圧力差
の検出は、内容積が小さい半導体膜式差圧センサを用
い、液体や個体を通過させず気体分子のみを通過させる
非付着性超微細孔膜を透圧手段６４とすることにより、
半永久的にこれを実施することができる。６１は表示手
段である。In the embodiment shown in FIG. 7, the sectional area ratio between the connecting pipe 38 and the thin tube 39 immediately after the powder dispersing means 2 is determined by the connecting pipe 3
If the speed of the dispersing gas 5 in the thin tube 39 is made to be about 5 times or more the speed of the powder in 8, the powder 4 is rapidly accelerated in the thin tube 39, and A pressure difference is generated between the gas at the inlet and the outlet of the thin tube 39. At this time, the powder 4 is in a state in which the clusters are crushed and dispersed into individual particles by the dispersing means 2 and are most easily accelerated. For example, a fine plastic powder of 300 μ or less or a ceramic powder of 10 μ or less In the case of a body or the like, the velocity of the gas and the powder at the outlet of the thin tube 39 can be made equal with the length of the thin tube 39 of about several tens of millimeters. In this case, the mass flow rate of the powder passing through the thin tube 39 A stable proportional relationship as shown in FIG. 8 is established between 54 and the output of the differential pressure sensor 40, and the proportional coefficient is the true specific gravity of the powder,
It is hardly affected by properties such as bulk specific gravity, particle size distribution, electric resistance and dielectric constant. In this case, the dispersing gas 5 is
It is necessary to maintain the set value 10 at a constant value by the flow rate setting means 9, but this is achieved by making the pressurized dispersing gas a constant pressure by a well-known constant pressure valve and passing it through a fixed fluid resistance such as a high resistance valve. The output of the differential pressure sensor 40 can be used as the powder mass flow rate signal 54. The detection of the pressure difference of the gas containing the powder before and after the thin tube 39 is performed by using a semiconductor membrane type differential pressure sensor having a small internal volume and using a non-adhesive ultra-fine pore membrane that allows only gas molecules to pass without passing through liquids or solids. By using the pressure permeable means 64,
This can be done semi-permanently. 61 is a display means.
【００４１】図７に示した本発明による実施例におい
て、粉体質量流量信号５４と、設定器４１の設定信号と
の差を制御器４２を介して制御弁４３にフィ−ドバック
して粉体タンク１５の内圧を制御することにより、細管
３９を通過する粉体の質量流量を設定値に保持すること
ができ、粉体の分散定流量粉体５２を得られる質量流量
定量供給装置を実現することができる。In the embodiment according to the present invention shown in FIG. 7, the difference between the powder mass flow rate signal 54 and the setting signal of the setting device 41 is fed back to the control valve 43 via the controller 42 to obtain the powder. By controlling the internal pressure of the tank 15, the mass flow rate of the powder passing through the thin tube 39 can be maintained at a set value, thereby realizing a mass flow rate quantitative supply device capable of obtaining a powder dispersion constant flow rate powder 52. be able to.
【００４２】図７に示した本発明による粉体流量計測手
段及びこれを利用した粉体定量供給装置においては、粉
体が細管３９の出口において粉体と気体の速度が等しく
なれば、差圧センサ４０の出力と粉体の質量流量との間
に安定した比例関係が得られる現象を利用したものであ
る。そしてこの現象を確実に実現する最も基本的な条件
は、粉体のクラスタ−が解砕分散されて個別粒子になっ
ていることである。その理由は、通常乾燥粉体、特に 1
00μ以下の高抵抗粉体の場合には、粉体はかなりの割合
がクラスタ−を形成している。粉体がクラスタ−を形成
しているとその加速が著しく阻害され、しかも粉体中の
クラスタ−の大きさや割合は、高度な品質管理のもとに
製造された同一の物性−真比重・嵩比重・粒度分布・
電気抵抗・誘電率等−をもつ製品粉体でも、貯蔵・ハ
ンドリング・湿度・含気等の条件によってかなりの範囲
で変化し、単に粉体を気体に混合して、その管路におけ
る圧力降下即ち差圧を検出しても、粉体の流量計測や定
量供給装置として利用することは実用上困難である。し
かもクラスタ−の解砕分散に使用する気体がなるべく少
ない方が望ましいことは、その下流にくるプロセスやそ
の運転条件等の自由度からいっても当然であり、図１、
図２に示した本発明による粉体分散手段２に、一定流量
の分散用気体５を供給してその直後に設けた細管３９に
おいて個別粒子に分散した粉体を加速することによって
発生する差圧を測定し、それによって本発明による粉体
流量の測定と定量供給装置が完成した。In the powder flow rate measuring means and the powder quantitative supply apparatus using the same according to the present invention shown in FIG. 7, if the powder and the gas flow at the outlet of the thin tube 39 become equal, the differential pressure This utilizes a phenomenon in which a stable proportional relationship is obtained between the output of the sensor 40 and the mass flow rate of the powder. The most basic condition for reliably realizing this phenomenon is that the powder clusters are crushed and dispersed into individual particles. The reason is usually dry powder, especially 1
In the case of a high-resistance powder having a size of 00 μ or less, a considerable proportion of the powder forms clusters. When the powder forms a cluster, the acceleration is remarkably impeded, and the size and ratio of the cluster in the powder are the same physical properties, true specific gravity, and bulk, which are manufactured under advanced quality control. Specific gravity, particle size distribution,
Even a product powder having electrical resistance, dielectric constant, etc., varies within a considerable range depending on conditions such as storage, handling, humidity, and aeration, and simply mixes the powder with a gas to produce a pressure drop, Even if a differential pressure is detected, it is practically difficult to use it as a powder flow rate measuring device or a quantitative supply device. In addition, it is natural that it is desirable to use as little gas as possible for the disintegration and dispersion of the cluster, even in view of the degree of freedom of the downstream process and its operating conditions.
A differential pressure generated by supplying a dispersing gas 5 at a constant flow rate to the powder dispersing means 2 according to the present invention shown in FIG. 2 and accelerating the powder dispersed in the individual particles in a thin tube 39 provided immediately thereafter. The measurement of the powder flow rate and the quantitative supply apparatus according to the present invention were completed.
【００４３】細管３９の長さ及び分散用気体５の流量
は、細管３９の出口において、粉体と気体の流速が等し
くなっていることが好ましいが、高度に品質管理され安
定した物性をもつ製品粉体に本発明を適用する場合に
は、必ずしも粉体と気体等が等速になっている必要はな
く、検量線を作成することによって粉体流量測定装置と
して利用することができ、これは粉体が個別粒子に分散
されていることにより安定した加速条件を得ることがで
き、多くの場合、実用上差し支えなく、粉体流量ないし
は定量供給の手段として利用することができるからであ
る。The length of the thin tube 39 and the flow rate of the dispersing gas 5 are preferably such that the flow rate of the powder and the gas at the outlet of the thin tube 39 are equal to each other. When the present invention is applied to powder, the powder and gas do not necessarily have to be at a constant speed, and can be used as a powder flow measuring device by creating a calibration curve. This is because stable acceleration conditions can be obtained by dispersing the powder in the individual particles, and in many cases, it can be used as a means for powder flow rate or quantitative supply without any practical problem.
【００４４】図７の実施例においては、粉体分散手段２
に供給される粉体流４は、タンク１５によって流動化さ
れた状態で供給されるが、粉体流の形成手段はこれだけ
に限定されるものではない。また細管３９は水平な場合
を例示してあるが、これ以外の条件の実施も可能であ
る。供給量の制御は制御弁４３による粉体タンクの内圧
の調整による方式を例示してあるが、これについても管
路３８の出口側につけたエゼクタ等の吸引手段等の他の
方式実施も可能である。In the embodiment shown in FIG.
Is supplied in a fluidized state by the tank 15, but the means for forming the powder stream is not limited to this. Although the case where the thin tube 39 is horizontal is illustrated, other conditions can be implemented. The supply amount is controlled by adjusting the internal pressure of the powder tank by the control valve 43. However, other methods such as suction means such as an ejector attached to the outlet side of the conduit 38 may be used. is there.
【００４５】図９に示したのは、本発明による粉体流量
計測装置及びこれを利用した粉体定量供給装置の別の実
施例であって、粉体分散手段２等の構成要素は、図１、
図２と共通の番号を付してある。図９において、バルク
粉体１６は粉体タンク１５中の吸上管路５６を通り、制
御手段５５の負圧によって粉体流４となる。図９におい
て粉体タンク１５は、制御手段５５動作中は加振手段５
８によって加振され、それによって吸上管路５６中の粉
体も含む粉体１６の流動性を改善する。加振支持手段５
９は、粉体タンク１５を加振手段５８によって有効に加
振すると同時に、振動絶縁の作用をする。FIG. 9 shows another embodiment of the powder flow rate measuring device and the powder quantitative supply device using the same according to the present invention. 1,
The numbers common to those in FIG. 2 are assigned. In FIG. 9, the bulk powder 16 passes through a suction pipe 56 in the powder tank 15 and becomes the powder flow 4 by the negative pressure of the control unit 55. In FIG. 9, the powder tank 15 is
8 to improve the flowability of the powder 16, including also the powder in the suction line 56. Vibration support means 5
Numeral 9 effectively vibrates the powder tank 15 by the vibrating means 58 and at the same time acts as a vibration insulator.
【００４６】図９において、粉体流４は粉体分散手段２
によって、クラスタ−が解砕分散され個別粒子に分散し
て、垂直な細管３９を通ることによって、設定手段１０
によって一定流量の分散用気体５によって加速され、細
管３９の出口では、分散用気体５と粉体とが同一の速度
になるように細管路３９の長さが定められ、差圧センサ
４０によって、細管３９の入口と出口の気体の圧力差を
測定し、その出力が、細管路３９を通る粉体の質量流量
と安定な比例関係をもつようにすることができる。In FIG. 9, the powder stream 4 is
The clusters are disintegrated and dispersed into individual particles by means of
Is accelerated by the dispersion gas 5 at a constant flow rate. At the outlet of the capillary 39, the length of the capillary 39 is determined so that the dispersion gas 5 and the powder have the same velocity. The pressure difference between the gas at the inlet and the outlet of the capillary 39 can be measured so that its output is in a stable proportional relationship with the mass flow of the powder through the capillary 39.
【００４７】図９において、差圧センサ４０の出力と、
設定器４１の出力とを比較し、その差が零になるように
制御器４２によって、制御弁４３を介して制御元圧６０
の制御手段５５がフィ−ドバック制御される。制御手段
５５は、例えば、具体的にはエジェクタ等を適用し、こ
れによって分散定流量粉体５２を得ることができる。In FIG. 9, the output of the differential pressure sensor 40 and
The output of the setter 41 is compared with the output of the setter 41, and the controller 42 controls the control source pressure 60 via the control valve 43 so that the difference becomes zero.
Of the control means 55 is feedback-controlled. For example, the control unit 55 specifically applies an ejector or the like, whereby the dispersed constant flow rate powder 52 can be obtained.
【００４８】図９の実施例では、細管路３９が垂直であ
り、図７の水平な細管路３９に比較して少ない分散用気
体５によって均一な加速を実現することができる。細管
路３９の向き、太さ、長さ、材質等は粉体の種類や前後
のプロセスから要求される運転条件等によって適切な方
式を選定する。また、図７に示した流動化した粉体タン
ク１５に、図９に示した垂直吸上方式を適用することも
できる。In the embodiment shown in FIG. 9, the narrow tube 39 is vertical, and uniform acceleration can be realized by a smaller amount of the dispersing gas 5 as compared with the horizontal narrow tube 39 in FIG. An appropriate method is selected for the direction, thickness, length, material, and the like of the narrow tube path 39 according to the type of powder and the operating conditions required from the preceding and following processes. The vertical suction system shown in FIG. 9 can be applied to the fluidized powder tank 15 shown in FIG.
【００４９】図１０に示したのは、図９のような方式の
粉体タンク１５で、粉体の流動性が悪い等の原因により
粉体の吸い上げが円滑にゆかない場合に適用する別の実
施例を示したものである。図１０において、吸上管路５
６の下端の下部に、部分流動化手段５７を離設し、その
上部の粉体を流動化気体１８によって部分的に流動化
し、これを流動化した粉体流４として吸い上げるように
したものである。この場合、粉体１６の大部分はバルク
状で、加振手段５８の振動により粉体タンクの底部に集
合供給される。FIG. 10 shows a powder tank 15 of the type shown in FIG. 9, which is applied to a case where the suction of powder is not smooth due to poor fluidity of the powder. It shows an example. In FIG. 10, the suction line 5
In the lower part of the lower end of 6, a partial fluidizing means 57 is separated, the upper part of the powder is partially fluidized by the fluidizing gas 18, and this is sucked up as the fluidized powder stream 4. is there. In this case, most of the powder 16 is bulk and is collectively supplied to the bottom of the powder tank by the vibration of the vibration means 58.
【００５０】図７、８、９、１０に示した本発明による
粉体流量計測装置及び粉体定量供給装置の著しい特徴
は、所要の設定値に合致して得られる供給量の粉体が、
個別粒子に分散した状態で得られ、しかも装置の構造が
極めて簡単で可動部がなく清掃容易であるということで
ある。他方、図１、２、３、４、５に示した本発明によ
る分級・混合・帯電等の実施例においては、それぞれの
単位操作には所要の粉体供給量が存在するのが通常であ
る。従って、多くの場合には、図７、８、９、１０に示
した粉体分散手段と分散粉体の定量供給手段を複合した
本発明による実施例を分級・混合・帯電等の単位操作に
適用することによって、粉体の解砕分散と定量供給を同
時に実現できるという、本発明による著しい効果を達成
することができる。本発明によるこの種の実施例は、本
発明における分散粉体利用手段３が、分散粉体２０の加
速差圧変換粉体流量計測装置６３の出力を制御する粉体
定量供給手段を前段として含む構造をなしているという
ことができる。A remarkable feature of the powder flow rate measuring device and the powder quantitative supply device according to the present invention shown in FIGS. 7, 8, 9 and 10 is that the powder of the supply amount obtained in accordance with the required set value is
It is obtained in a state of being dispersed in individual particles, and the structure of the apparatus is extremely simple, there are no moving parts, and cleaning is easy. On the other hand, in the embodiments such as classification, mixing, and charging according to the present invention shown in FIGS. 1, 2, 3, 4, and 5, it is usual that each unit operation has a required powder supply amount. . Therefore, in many cases, the embodiment according to the present invention in which the powder dispersing means shown in FIGS. 7, 8, 9 and 10 is combined with the quantitative supply means of the dispersed powder is used for unit operations such as classification, mixing, and charging. By applying the same, it is possible to achieve a remarkable effect according to the present invention, in which the disintegration and dispersion of powder and the quantitative supply can be simultaneously realized. In this type of embodiment according to the present invention, the dispersed powder utilizing means 3 in the present invention includes, as a preceding stage, a powder quantitative supply means for controlling the output of the accelerated differential pressure conversion powder flow rate measuring device 63 of the dispersed powder 20. It can be said that it has a structure.
【００５１】本発明による粉体分散手段２の偏平流路６
は、粉体流４に対して直角に開口するのを通常とする。
しかし粉体流の進行速度が速い場合などには、粉体流４
の進行方向に対して60゜以内の鋭角をなす方が粉体の分
散が良好になる場合もあり、この場合も本発明に含まれ
る。他方、偏平流路６が粉体流４の進行方向に対して12
0゜以内の鈍角をなすようにする事によって、細管３９
に対してわずかのエジェクタ効果をもたせ、これによっ
て粉体供給量零のときの細管３９における分散用気体５
の圧力降下を打ち消すことができる等の利益が得られる
場合もあり、これも本発明に含まれる。The flat channel 6 of the powder dispersing means 2 according to the present invention
Normally open at right angles to the powder stream 4.
However, when the traveling speed of the powder flow is high, the powder flow 4
In some cases, forming an acute angle within 60 ° with respect to the traveling direction of the powder may improve the dispersion of the powder, and such a case is also included in the present invention. On the other hand, the flat flow path 6 is
By making an obtuse angle within 0 °, the thin tube 39
Has a slight ejector effect on the dispersion gas 5 in the thin tube 39 when the powder supply amount is zero.
In some cases, benefits such as the fact that the pressure drop can be canceled out are also included in the present invention.
【００５２】本発明による粉体分散手段２の偏平流路６
は、図１、図２に示したように、粉体流４に開口する相
隣る偏平流路口の両端が相接しているのを通常とし、大
容量の長期連続運転に適している。しかし粉体流４の流
量が少ない場合等には必ずしもこの限りでなく、粉体流
４の中心軸に対して軸対象をなす放射線状の細孔を適用
することもできる。また、図１における粉体分散手段２
の共通流路１４が粉体流４と全周で連通するようにした
偏平流路６によっても粉体クラスタ−の解砕分散を実現
することができ、本発明の一実施形態であるが、図１、
図２に示した複数の流路に分割した方式が粉体の撹拌乱
流発生効果にすぐれ、少ない分散気体で良好な解砕分散
効果が得られる。The flat channel 6 of the powder dispersing means 2 according to the present invention
As shown in FIGS. 1 and 2, it is normal that both ends of adjacent flat flow passage openings that open into the powder flow 4 are in contact with each other, which is suitable for large-capacity long-term continuous operation. However, this is not always the case when the flow rate of the powder flow 4 is small, and radial pores symmetrical with respect to the central axis of the powder flow 4 can also be applied. The powder dispersing means 2 shown in FIG.
The flat flow path 6 in which the common flow path 14 communicates with the powder flow 4 all around can also realize the disintegration and dispersion of the powder cluster, which is one embodiment of the present invention. Figure 1,
The method of dividing into a plurality of flow paths shown in FIG. 2 is excellent in the effect of generating a turbulent flow of powder, and a good crushing and dispersing effect can be obtained with a small amount of dispersed gas.
【００５３】[0053]
【発明の効果】本発明によれば、小型で構造簡単な装置
で、小量の気体によって、クラスタ−を形成している微
細な乾燥粉体を解砕分散して個別粒子にすることのでき
る高性能粉体分散処理方法及び装置を得ることができ
る。また、この装置を分級・混合・帯電等の単位操作に
組み込むことによりそれらの単位操作の性能を著しく向
上させ、新しい高性能単位操作を実現することができ
る。更に、本発明による粉体分散処理装置の直後に細管
を接続し、その細管の入口と出口における圧力差検出手
段を設けることにより、そこを流れる粉体の質量流量な
いしは特定粉体の流量検出手段を得ることができる。こ
の粉体流量検出手段は、小型構造簡単で使い易く、しか
も安価であるという著しい特徴を有するものである。According to the present invention, it is possible to crush and disperse fine dry powders forming clusters into individual particles with a small amount of gas using a small and simple device. A high-performance powder dispersion treatment method and apparatus can be obtained. In addition, by incorporating this device into unit operations such as classification, mixing, and charging, the performance of those unit operations can be significantly improved, and a new high-performance unit operation can be realized. Further, by connecting a thin tube immediately after the powder dispersion processing apparatus according to the present invention and providing a pressure difference detecting means at the inlet and outlet of the thin tube, a mass flow rate of powder flowing therethrough or a flow rate detecting means of specific powder is provided. Can be obtained. This powder flow rate detecting means has a remarkable feature that it is simple in structure, easy to use, and inexpensive.
【００５４】本発明による上記の粉体流量検出手段の出
力が、設定値と一致するように粉体供給手段を自動制御
することにより、クラスタ−を解砕分散した個別粒子粉
体の定量供給装置を得ることができる。通常、分級・混
合・帯電等の単位操作にはほとんどの場合粉体の定量供
給機能が要求される。本発明による粉体の分散処理機能
と定量供給機能を複合化した粉体分散定量供給手段は、
このような場合に適用して前記各単位操作の性能向上、
小型化、使い易さの向上、低価格化等の著しい効果を得
ることができる。The apparatus for quantitatively supplying individual particle powder in which clusters are crushed and dispersed by automatically controlling the powder supply means so that the output of the powder flow rate detection means according to the present invention matches the set value. Can be obtained. Normally, unit operations such as classification, mixing, and electrification generally require a quantitative powder supply function. Powder dispersion quantitative supply means that combines the powder dispersion processing function and the quantitative supply function according to the present invention,
In such a case, the performance of each unit operation is improved,
Significant effects such as miniaturization, improvement in ease of use, and price reduction can be obtained.
【図１】本発明による粉体分散処理方法とその装置及び
粉体分散処理装置、及びこれを適用した粉体分級装置の
一実施例の分散装置の粉体進行方向に沿った垂直断面
図、及び分級装置のシステム図である。FIG. 1 is a vertical cross-sectional view along the powder advancing direction of a dispersion apparatus according to an embodiment of a powder dispersion processing method and apparatus, a powder dispersion processing apparatus, and a powder classification apparatus to which the present invention is applied; And a system diagram of a classifier.
【図２】図１の粉体分散手段の、粉体進行に直角な垂直
断面図である。FIG. 2 is a vertical sectional view of the powder dispersing means of FIG. 1, which is perpendicular to the powder advance.
【図３】本発明による粉体分散装置により構成される粉
体混合装置のシステム図である。FIG. 3 is a system diagram of a powder mixing device constituted by a powder dispersion device according to the present invention.
【図４】本発明による接触帯電装置の構造を示す断面図
である。FIG. 4 is a sectional view showing a structure of a contact charging device according to the present invention.
【図５】本発明によるコロナ帯電装置の構造を示す断面
図である。FIG. 5 is a sectional view showing a structure of a corona charging device according to the present invention.
【図６】本発明による、別のコロナ帯電装置の構造を示
す断面図である。FIG. 6 is a sectional view showing the structure of another corona charging device according to the present invention.
【図７】本発明による、粉体分散流量検出手段及びこれ
を適用した粉体分散定量供給装置の一実施例の構造及び
システム構造を示す図である。FIG. 7 is a diagram showing a structure and a system structure of an embodiment of a powder dispersion flow rate detecting means and a powder dispersion quantitative supply apparatus to which the same is applied according to the present invention.
【図８】本発明による粉体分散流量検出手段の特性を示
す検量線図の一例である。FIG. 8 is an example of a calibration curve diagram showing characteristics of a powder dispersion flow rate detecting means according to the present invention.
【図９】本発明による、粉体分散流量検出手段及びこれ
を適用した粉体分散定量供給装置の別の実施例の構造及
びシステム構成を示す図である。FIG. 9 is a diagram showing the structure and system configuration of another embodiment of the powder dispersion flow rate detecting means and the powder dispersion quantitative supply apparatus to which the present invention is applied, according to the present invention.
【図１０】本発明による、粉体分散流量検出手段及びこ
れを適用した粉体分散定量供給装置の更に別の実施例
の、粉体流形成手段の構造を示す部分説明図である。FIG. 10 is a partial explanatory view showing the structure of a powder flow forming means in still another embodiment of the powder dispersion flow rate detecting means and the powder dispersion quantitative supply apparatus to which the present invention is applied.
１ 粉体流形成手段 ２ 粉体分散手段 ３ 分散粉体利用手段 ４ 粉体流 ５ 分散用気体 ６ 偏平流路 ７ 高速薄層気体剪断層噴流 ９ 流量設定手段 １４ 共通流路 １５ 粉体タンク １６ 粉体 ２０ 分散粉体 ２２ 分級機 ２５ 混合機 ２８ 接触帯電装置 ２９ コロナ帯電装置 ３０ そらせコ−ン ３６ 多段拡縮円環路 ３７ 帯電粉体 ３９ 細管 ４０ 差圧センサ ４１ 設定器 ４２ 制御器 ５２ 分散定流量粉体 ５４ 粉体質量流量信号 ５７ 部分流動化手段 ６３ 加速差圧変換粉体流量計測装置 DESCRIPTION OF SYMBOLS 1 Powder flow forming means 2 Powder dispersing means 3 Dispersed powder utilization means 4 Powder flow 5 Dispersion gas 6 Flat flow path 7 High-speed thin layer gas shear layer jet 9 Flow rate setting means 14 Common flow path 15 Powder tank 16 Powder 20 Dispersed powder 22 Classifier 25 Mixer 28 Contact charging device 29 Corona charging device 30 Deflection cone 36 Multistage expanding / contracting circular path 37 Charged powder 39 Thin tube 40 Differential pressure sensor 41 Setting device 42 Controller 52 Dispersion constant Flow powder 54 Powder mass flow signal 57 Partial fluidization means 63 Accelerated differential pressure conversion powder flow measuring device
Claims (12)
流中で交差衝突する粉体流速度より高速な薄層気体剪断
層噴流を、粉体流に向かって吹き込むことを特徴とする
粉体分散処理方法。The present invention is characterized in that a thin layer gas shear layer jet having a speed higher than a powder flow velocity which collides with a continuously supplied powder flow in a powder flow is blown toward the powder flow. Powder dispersion treatment method.
流中で交差衝突する粉体流より高速な薄層気体剪断層噴
流を、粉体に向かって吹き込む偏平気体噴出口を、粉体
流外周に設けたことを特徴とする粉体分散処理装置。2. A flat gas jet for blowing a thin-layer gas shear layer jet, which is higher in speed than a powder flow cross-colliding in a powder flow, with respect to a continuously supplied powder flow, toward the powder. And a powder dispersion treatment device provided on the outer periphery of the powder flow.
突する粉体流より高速な薄層気体剪断層噴流を、該粉体
流に向かって吹き込む偏平気体噴出口を設けた粉体分散
処理手段と、該粉体分散処理手段によって分散された分
散粉体を利用する分散粉体利用手段より成ることを特徴
とする粉体処理装置。3. A powder flow forming means, and a flat gas jet for blowing a thin layer gas shear layer jet, which is faster than the powder flow cross-colliding in the powder flow, toward the powder flow. A powder processing apparatus comprising: a powder dispersing means; and a dispersed powder utilizing means utilizing the dispersed powder dispersed by the powder dispersing means.
構成する偏平気体噴出口付近に粉体流を誘導する粉体流
誘導手段を有することを特徴とする請求項３、記載の粉
体処理装置。4. The powder flow forming means according to claim 3, wherein the powder flow forming means has a powder flow guiding means for guiding a powder flow in the vicinity of a flat gas outlet constituting the powder dispersion processing means. Powder processing equipment.
ることを特徴とする請求項３記載の粉体処理装置。5. The powder processing apparatus according to claim 3, wherein the means for utilizing the dispersed powder is a powder classifier.
ることを特徴とする請求項３記載の粉体処理装置。6. The powder processing apparatus according to claim 3, wherein the means for utilizing the dispersed powder is a powder mixing apparatus.
置であることを特徴とする請求項３記載の粉体処理装
置。7. The powder processing apparatus according to claim 3, wherein the dispersed powder utilization means is a powder contact charging device.
帯電装置であることと特徴とする請求項３記載の粉体処
理装置。8. The powder processing apparatus according to claim 3, wherein the dispersed powder utilization means is a powder corona discharge charging device.
放電帯電装置の強電界領域に吹き寄せることを特徴とす
る請求項３記載の粉体処理装置。9. The powder processing apparatus according to claim 3, wherein the powder dispersion processing means blows the dispersed powder to a strong electric field region of the corona discharge charging device.
段の下流に近接して接続された細管を含む分散粉体の加
速差圧変換粉体流量計測装置であることを特徴とする請
求項３記載の粉体処理装置。10. A powder flow measuring device for accelerating differential pressure conversion of a dispersed powder including a thin tube connected in close proximity to a downstream of a powder dispersion processing means. Item 4. The powder processing apparatus according to Item 3.
差圧変換粉体流量計測装置の出力を制御する粉体定量供
給手段を含むことを特徴とする請求項３記載の粉体処理
装置。11. The powder processing apparatus according to claim 3, wherein the dispersed powder utilizing means includes a powder fixed amount supplying means for controlling an output of the accelerated differential pressure conversion powder flow rate measuring device for the dispersed powder. apparatus.
差圧変換粉体流量計測装置及びこれを含む粉体定量供給
手段を前段に設けたことを特徴とする請求項３記載の粉
体処理装置。12. The powder according to claim 3, wherein the means for utilizing the dispersed powder is provided with an apparatus for measuring the powder flow rate of the accelerated differential pressure conversion of the dispersed powder and a constant-quantity powder supply means including the same. Body treatment device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10307335A JP2000126568A (en) | 1998-10-28 | 1998-10-28 | Method and apparatus for dispersing powder and apparatus for treating powder |
| PCT/JP1999/005959 WO2000024517A1 (en) | 1998-10-28 | 1999-10-28 | Powder dispersion-treating method and device therefor and powder treating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10307335A JP2000126568A (en) | 1998-10-28 | 1998-10-28 | Method and apparatus for dispersing powder and apparatus for treating powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000126568A true JP2000126568A (en) | 2000-05-09 |
Family
ID=17967900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10307335A Pending JP2000126568A (en) | 1998-10-28 | 1998-10-28 | Method and apparatus for dispersing powder and apparatus for treating powder |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2000126568A (en) |
| WO (1) | WO2000024517A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009247999A (en) * | 2008-04-07 | 2009-10-29 | Nisshin Engineering Co Ltd | Mixer |
| JP2011110512A (en) * | 2009-11-27 | 2011-06-09 | Ricoh Co Ltd | Powder dispersion device, classification apparatus, classification method, and method for manufacturing toner |
| JP2021075756A (en) * | 2019-11-08 | 2021-05-20 | 大同特殊鋼株式会社 | Method for producing powder material |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113564753B (en) * | 2021-07-05 | 2022-11-08 | 浙江大学 | Fiber dispersing and collecting device and method based on airflow impact and static electricity |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0636891B2 (en) * | 1986-03-10 | 1994-05-18 | 秀雄 長坂 | Powder charging device and electrostatic powder coating device |
| JPH03217258A (en) * | 1990-01-22 | 1991-09-25 | Kiyoyuki Horii | Classification of powder and production of composite material |
| JPH08323250A (en) * | 1995-06-01 | 1996-12-10 | Ikuo Tochisawa | Method for charging particle and apparatus therefor |
| JP3867176B2 (en) * | 1996-09-24 | 2007-01-10 | アール・アイ・ディー株式会社 | Powder mass flow measuring device and electrostatic powder coating device using the same |
-
1998
- 1998-10-28 JP JP10307335A patent/JP2000126568A/en active Pending
-
1999
- 1999-10-28 WO PCT/JP1999/005959 patent/WO2000024517A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009247999A (en) * | 2008-04-07 | 2009-10-29 | Nisshin Engineering Co Ltd | Mixer |
| JP2011110512A (en) * | 2009-11-27 | 2011-06-09 | Ricoh Co Ltd | Powder dispersion device, classification apparatus, classification method, and method for manufacturing toner |
| JP2021075756A (en) * | 2019-11-08 | 2021-05-20 | 大同特殊鋼株式会社 | Method for producing powder material |
| JP7427919B2 (en) | 2019-11-08 | 2024-02-06 | 大同特殊鋼株式会社 | Manufacturing method of powder material |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2000024517A1 (en) | 2000-05-04 |
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