JPH07333113A - Particle size measuring apparatus for powder/grain in fluidized bed treating apparatus - Google Patents
Particle size measuring apparatus for powder/grain in fluidized bed treating apparatusInfo
- Publication number
- JPH07333113A JPH07333113A JP6152795A JP15279594A JPH07333113A JP H07333113 A JPH07333113 A JP H07333113A JP 6152795 A JP6152795 A JP 6152795A JP 15279594 A JP15279594 A JP 15279594A JP H07333113 A JPH07333113 A JP H07333113A
- Authority
- JP
- Japan
- Prior art keywords
- particle size
- fluidized bed
- powder
- size measuring
- powder particles
- 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
- 239000002245 particle Substances 0.000 title claims abstract description 100
- 239000000843 powder Substances 0.000 title claims abstract description 36
- 238000005070 sampling Methods 0.000 claims abstract description 30
- 239000011521 glass Substances 0.000 claims abstract description 23
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- 238000000576 coating method Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000010926 purge Methods 0.000 claims abstract description 7
- 239000008187 granular material Substances 0.000 claims description 33
- 238000012545 processing Methods 0.000 claims description 30
- 238000001035 drying Methods 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 3
- 238000005469 granulation Methods 0.000 abstract description 13
- 230000003179 granulation Effects 0.000 abstract description 13
- 230000003449 preventive effect Effects 0.000 abstract 2
- 238000000638 solvent extraction Methods 0.000 abstract 2
- 238000005259 measurement Methods 0.000 description 11
- 239000012530 fluid Substances 0.000 description 7
- 239000007921 spray Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 4
- 238000007873 sieving Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920002261 Corn starch Polymers 0.000 description 1
- 238000001069 Raman spectroscopy Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000008120 corn starch Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000002050 diffraction method Methods 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002356 laser light scattering Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Optical Measuring Cells (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は流動層処理装置、コーテ
ィング装置等による粉粒体の処理工程における粒度測定
方法に関するものであり、特に造粒中の粉粒体を直接、
粒度測定することができる装置に係るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a particle size measuring method in a process of treating a powder or granular material by a fluidized bed processing device, a coating device or the like.
The present invention relates to an apparatus capable of measuring particle size.
【０００２】[0002]
【発明の背景】従来より、粉粒体の処理工程において
は、造粒あるいはコーティングを行う場合、流動層処理
装置が多く使用されている。このような装置を操作する
にあたっては、例えば造粒操作においては、造粒時の層
内水分、噴霧ノズルからの噴霧液速度、液を微粒化する
ための噴霧圧、熱風温度等の操作因子を調整し、目的の
粒径の製品を得ている。このため、あらかじめ操作因子
の制御値を設定しておいて装置の運転を行い、造粒途中
での操作因子の調整は目視観察により制御値を変更して
行っている。従って、例えば季節により外気湿度が変わ
った場合等には噴霧液速度を調整する等の操作が必要と
なるが、この操作は専らオペレータの経験に委ねられ、
その結果、操作ミスの要因となっていた。また仮にオペ
レータの判断が正しかったとしても従来は、直接造粒中
の層内の造粒物の粒度を測定する適当な手段がなかった
ため、例えば造粒途中あるいは終了後にサンプリングを
行い、粒度測定を行う方法によって確認せざるを得ず、
そのデータに基づく操作を行ったとしてももはやタイミ
ングが遅れ、結果的に有効な判断操作とはならなかっ
た。このため、近赤外線水分計を用いて常時層内水分を
監視したり、あるいは、水分計からの出力を用いて層内
水分が一定となるような制御も行なわれているが、いず
れにしても、間接的に粒径を制御しているにすぎない。
また特開平５−２８５３６３号に開示されるように、装
置内部の流動している粒子を、装置壁面に設けた硝子窓
の外側に設けた光学センサにより内部を撮像し、画像処
理により内部の粒子の状態を検出する方法もあるが、粒
子の硝子面への付着対策が複雑になり、装置のサニタリ
ー性、洗浄性の面から実用的ではない。2. Description of the Related Art Conventionally, a fluidized bed processing apparatus has been widely used in the step of granulating or coating in the step of treating powder and granules. In operating such an apparatus, for example, in granulation operation, the operation factors such as in-layer water content during granulation, spray liquid velocity from the spray nozzle, spray pressure for atomizing the liquid, hot air temperature, etc. Adjusted to obtain the product with the target particle size. For this reason, the control value of the operation factor is set in advance, the apparatus is operated, and the adjustment of the operation factor during granulation is performed by changing the control value by visual observation. Therefore, for example, when the outside air humidity changes depending on the season, it is necessary to perform an operation such as adjusting the spray liquid velocity, but this operation is exclusively entrusted to the experience of the operator,
As a result, it has been a cause of operational errors. Even if the operator's judgment was correct, conventionally there was no suitable means for directly measuring the particle size of the granulated product in the layer during granulation, so for example, sampling was performed during or after granulation, and the particle size was measured. I have no choice but to confirm depending on the method
Even if the operation based on the data was performed, the timing was already delayed, and as a result, the judgment operation was not effective. Therefore, the near-infrared moisture meter is constantly used to monitor the moisture content in the layer, or the output from the moisture meter is used to control the moisture content in the layer to be constant. However, the particle size is indirectly controlled.
Further, as disclosed in Japanese Patent Laid-Open No. 5-285363, the inside of the apparatus is imaged by an optical sensor provided outside a glass window provided on the apparatus wall surface, and the internal particles are subjected to image processing. Although there is a method of detecting the state of, the measure for adhering particles to the glass surface becomes complicated, and it is not practical in terms of the sanitary property and cleaning property of the device.
【０００３】[0003]
【開発を試みた技術的事項】本発明はこのような背景の
認識に基づきなされたものであって、造粒中の流動層内
の粉粒体の粒度を直接測定することのできる、新規な流
動層処理装置における粉粒体の粒度測定装置の開発を試
みたものである。[Technical Items Attempted to Develop] The present invention has been made on the basis of the recognition of such a background, and it is possible to directly measure the particle size of the granular material in the fluidized bed during granulation. This is an attempt to develop a particle size measuring device for powder particles in a fluidized bed processing device.
【０００４】[0004]
【目的達成の手段】すなわち請求項１記載の流動層処理
装置における粉粒体の粒度測定装置は、粉粒体の乾燥、
造粒、コーティング等を行う流動層処理装置の適所に接
続されるサンプリング装置と、このサンプリング装置か
ら連通状態に分岐するように取付けられた導管と、前記
導管と交差状に組み合わされるレーザ光式粒径センサ
と、前記粒径センサの出力をデータ処理するコンピュー
タとを具えることを特徴とする。[Means for Achieving the Object] That is, a particle size measuring device for powder particles in a fluidized bed processing apparatus according to claim 1 is
A sampling device connected to a proper place of a fluidized bed processing device for granulating, coating, etc., a conduit attached so as to branch from the sampling device into a communicating state, and a laser light type particle combined with the conduit in an intersecting manner. It is characterized by comprising a diameter sensor and a computer for data processing the output of the particle size sensor.
【０００５】また請求項２記載の流動層処理装置におけ
る粉粒体の粒度測定装置は、前記要件に加え、前記導管
は、レーザ光式粒径センサのレーザ光が通過する水平中
空部と、粉粒体の自由落下経路となる垂直中空部とから
成り、水平中空部の両端部分には反射防止コーティング
ガラスを具えることを特徴とする。In addition to the above requirements, in the particle size measuring apparatus for powder particles in a fluidized bed processing apparatus according to a second aspect, the conduit has a horizontal hollow portion through which laser light of a laser light particle size sensor passes, and a powder. It is characterized by comprising a vertical hollow portion which is a free fall path of particles, and antireflection coating glass is provided at both end portions of the horizontal hollow portion.
【０００６】更にまた請求項３記載の流動層処理装置に
おける粉粒体の粒度測定装置は、前記要件に加え、前記
反射防止コーティングガラスの内側には、エアパージ機
構を具えることを特徴とする。Furthermore, in addition to the above requirements, the particle size measuring apparatus for powder particles in the fluidized bed processing apparatus according to claim 3 is characterized in that an air purging mechanism is provided inside the antireflection coating glass.
【０００７】更にまた請求項４記載の流動層処理装置に
おける粉粒体の粒度測定装置は、前記要件に加え、前記
水平中空部の上下にはそれぞれ仕切弁を具え、更にこれ
ら仕切弁の間にリーク弁を具えることを特徴とする。Furthermore, in addition to the above requirements, the particle size measuring apparatus for powder particles in the fluidized bed processing apparatus according to claim 4 is provided with sluice valves above and below the horizontal hollow portion, respectively, and further between these sluice valves. It is characterized by having a leak valve.
【０００８】更にまた請求項５記載の流動層処理装置に
おける粉粒体の粒度測定装置は、前記要件に加え、前記
導管と流動室とを連結する空輸配管を設け、粉粒体が流
動室に返送される経路を形成することを特徴とする。こ
れら発明により前記目的を達成しようとするものであ
る。Furthermore, in addition to the above requirements, the particle size measuring apparatus for powder particles in the fluidized bed processing apparatus according to claim 5 is provided with an air-introducing pipe connecting the conduit and the fluid chamber, and the particle particles are provided in the fluid chamber. It is characterized by forming a route to be returned. The above objects are intended to be achieved by these inventions.
【０００９】[0009]
【発明の作用】まず請求項１記載の発明によれば、サン
プリング装置によって、処理中の粉粒体を定量的にサン
プリングし、サンプリングした粉粒体を導管によってレ
ーザ光式粒径センサに導き粒径測定を行い、コンピュー
タにより測定データを解析し、平均粒子径、均一度、粒
度分布、等のあらかじめ設定された項目を算出する。According to the first aspect of the present invention, the powdery material being processed is quantitatively sampled by the sampling device, and the sampled powdery material is guided by the conduit to the laser light type particle size sensor. The diameter is measured, the measurement data is analyzed by a computer, and preset items such as average particle diameter, homogeneity, and particle size distribution are calculated.
【００１０】また請求項２記載の発明によれば、前記導
管の水平中空部の両端部分には反射防止コーティングガ
ラスを具えるので、レーザ光式粒径センサのレーザ光を
透過する。According to the second aspect of the invention, since the antireflection coating glass is provided at both ends of the horizontal hollow portion of the conduit, the laser beam of the laser beam type particle size sensor is transmitted.
【００１１】更にまた請求項３記載の発明によれば、前
記反射防止コーティングガラスの内側には、エアパージ
機構を具えるので、反射防止コーティングガラスへの粉
粒体の付着を回避する。Further, according to the third aspect of the present invention, since an air purging mechanism is provided inside the antireflection coating glass, adhesion of the powder or granules to the antireflection coating glass is avoided.
【００１２】更にまた請求項４記載の発明によれば、前
記水平中空部の上下にはそれぞれ仕切弁を具え、更にこ
れら仕切弁の間にリーク弁を具えるので、これら弁の切
り替えにより、粉粒体Ｇの移動経路を選択することがで
きる。Further, according to the invention as defined in claim 4, since the sluice valves are provided on the upper and lower sides of the horizontal hollow portion, and the leak valve is further provided between these sluice valves, the powder is changed by switching these valves. It is possible to select the movement path of the grain G.
【００１３】更にまた請求項５記載の発明によれば、前
記導管と流動室とを連結する空輸配管を設け、粉粒体が
流動室に返送される経路を形成するので、測定された粉
粒体を流動室に返送する。Further, according to the invention of claim 5, since an air transportation pipe for connecting the conduit and the flow chamber is provided to form a route for returning the powdery or granular material to the flowable chamber, the measured powdery or granular particles are formed. Return the body to the flow chamber.
【００１４】[0014]
【実施例】以下本発明を図示の実施例に基づいて具体的
に説明する。符号１は本発明の粒度測定装置であって、
このものは流動層処理装置２の流動室２１の外部におけ
る適宜の位置に付設され、サンプリング装置３と、導管
４と、レーザ光式粒径センサ５と、空輸配管６と、コン
ピュータ７とを具えて成る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to illustrated embodiments. Reference numeral 1 is a particle size measuring device of the present invention,
This is provided at an appropriate position outside the flow chamber 21 of the fluidized bed processing apparatus 2, and includes a sampling device 3, a conduit 4, a laser beam particle size sensor 5, an air transportation pipe 6, and a computer 7. It consists of
【００１５】まず本発明を適用する流動層処理装置２に
ついて簡単に説明する。このものは粉粒体Ｇの乾燥、造
粒、コーティング等を行う装置であり、流動室２１と、
噴霧室２３、フィルタ室等により構成される。流動層処
理装置２は公知の構成とし、流動室２１に空気を送り込
み、原料粉体を膨張させて流動化された粉体層である流
動層を形成し、これに水やバインダ液を加えて、粉粒体
Ｇを凝集形成するものである。流動室２１は流動層処理
装置２の下部を構成し逆円錐台形をしており、その外周
面の適宜の位置にはサンプリングノズル２２が設けられ
ている。噴霧室２３には水、あるいは結合剤となるバイ
ンダ液を噴霧するための噴霧ノズル２４が設置されてい
る。フィルタ室には原料粉体と乾燥用空気とを分離する
ためのバグフィルタが組み込んであり、装置外へ原料粉
体が飛散しないようにしてある。更に底部には、多孔板
あるいは金網等が設けられており、ここから空気を送り
込む。First, the fluidized bed processing apparatus 2 to which the present invention is applied will be briefly described. This is an apparatus for drying, granulating, coating, etc. the powder G, and includes a flow chamber 21,
It is composed of a spray chamber 23, a filter chamber, and the like. The fluidized bed processing apparatus 2 has a known structure, and air is sent into the fluidized chamber 21 to expand the raw material powder to form a fluidized bed, which is a fluidized powder bed, and water or a binder liquid is added thereto. , To aggregate and form the granular material G. The fluid chamber 21 constitutes the lower part of the fluidized bed processing apparatus 2 and has an inverted truncated cone shape, and a sampling nozzle 22 is provided at an appropriate position on the outer peripheral surface thereof. The spray chamber 23 is provided with a spray nozzle 24 for spraying water or a binder liquid serving as a binder. A bag filter for separating the raw material powder and the drying air is incorporated in the filter chamber to prevent the raw material powder from scattering outside the apparatus. Further, a perforated plate, a wire net, or the like is provided at the bottom portion, and air is sent from here.
【００１６】次にサンプリング装置３について説明す
る。サンプリング装置３は、一例として流動層処理装置
２における流動室２１に標準仕様として設けられること
のあるサンプリングノズル２２を利用して流動室２１の
外部に付設されるものであり、このようにした場合には
既設の装置についても改造することなく設置が可能であ
る。サンプリング装置３は図２に示すように実質的にス
クリューコンベヤを構成するものであって、管状のケー
シング３１内にスクリュー３２を配し、更にこれを回転
駆動するエアモータ３３をケーシング３１の一端に設け
る。ケーシング３１の先端には粒子取入口３４を設け、
流動室２１に対して粒子取入口３４がその内部に臨むよ
うにして設置される。Next, the sampling device 3 will be described. The sampling device 3 is attached to the outside of the flow chamber 21 by utilizing a sampling nozzle 22 which may be provided as a standard specification in the flow chamber 21 of the fluidized bed processing device 2 as an example. The existing equipment can be installed without modification. The sampling device 3 substantially constitutes a screw conveyor as shown in FIG. 2, in which a screw 32 is arranged in a tubular casing 31, and an air motor 33 for rotationally driving the screw 32 is provided at one end of the casing 31. . A particle inlet 34 is provided at the tip of the casing 31,
The particle intake port 34 is installed so as to face the inside of the flow chamber 21.
【００１７】流動室２１内の流動状態にある粉粒対Ｇ
は、粒子取入口３４より取り込まれ、スクリュー３２に
より流動室２１の外、つまりサンプリング装置３内部へ
と移送される。このときスクリュー３２の回転を調整す
ることにより、サンプリング量を調整することが可能で
ある。スクリュー３２の回転数はエアモータ３３へ供給
するエアの圧力を調整することにより変えることが可能
であり、測定に必要な最低限の量をサンプリングするこ
とができる。A pair of powder particles G in a fluid state in the fluid chamber 21
Are taken in through the particle intake port 34 and transferred by the screw 32 to the outside of the flow chamber 21, that is, the inside of the sampling device 3. At this time, the sampling amount can be adjusted by adjusting the rotation of the screw 32. The rotation speed of the screw 32 can be changed by adjusting the pressure of the air supplied to the air motor 33, and the minimum amount required for measurement can be sampled.
【００１８】次に導管４について説明する。このものは
サンプリング装置３と後述する空輸配管６との間に装着
される。導管４は図３に示すようにテーパー状の垂直中
空部４１と、これと交差する水平中空部４２とから成
る。水平中空部４２の両端部分には請求項２に開示した
ように、反射防止コーティングガラス４３を具える。こ
のものは表面をコーティング処理した光学ガラスであ
り、入射するレーザ光をその境界面において反射、散乱
することなく透過させる。反射防止コーティングガラス
４３の内側にはエアパージ機構４４を具える。このもの
はガラス面と平行にガラスの中心に向かってエアを吹き
出すエア吹出口４５を設け、配管継手４６を介してエア
供給機構からエアを送るというものである。供給するエ
アの圧力を調整することにより流速を変えることが可能
である。また前記エアの供給機構は、前記エアモータ３
３を駆動するものと共有することができるし、それぞれ
独立して設けてもよい。導管４はクランプ継手によりサ
ンプリング装置３に取り付けられ、容易に着脱可能な構
造となっており、洗浄性が良い。Next, the conduit 4 will be described. This is mounted between the sampling device 3 and an air transportation pipe 6 described later. As shown in FIG. 3, the conduit 4 includes a vertical hollow portion 41 having a tapered shape and a horizontal hollow portion 42 intersecting with the vertical hollow portion 41. Both ends of the horizontal hollow portion 42 are provided with antireflection coating glass 43 as disclosed in claim 2. This is an optical glass whose surface is coated, and allows incident laser light to pass through the boundary surface without being reflected or scattered. An air purge mechanism 44 is provided inside the antireflection coating glass 43. This is provided with an air outlet 45 that blows air toward the center of the glass in parallel with the glass surface, and sends the air from an air supply mechanism via a pipe joint 46. The flow velocity can be changed by adjusting the pressure of the supplied air. The air supply mechanism is the air motor 3
3 can be shared with those for driving, or they can be provided independently. The conduit 4 is attached to the sampling device 3 by a clamp joint, has a structure that can be easily attached and detached, and has good washability.
【００１９】次に仕切弁８１、８２、リーク弁８３と導
管４について説明する。これらの弁は一般に使用される
フルボアタイプのサニタリーボールバルブあるいはバタ
フライバルブである。図１に示すように、仕切弁８１は
サンプリング装置３と導管４との間に設けられ、仕切弁
８２は導管４と後述する空輸配管６との間に設けられ
る。またリーク弁８３は、垂直中空部４１の水平中空部
４２よりもサンプリング装置３側に設けられる。Next, the gate valves 81 and 82, the leak valve 83 and the conduit 4 will be described. These valves are commonly used full bore type sanitary ball valves or butterfly valves. As shown in FIG. 1, the sluice valve 81 is provided between the sampling device 3 and the conduit 4, and the sluice valve 82 is provided between the conduit 4 and the air pipe 6 described later. The leak valve 83 is provided closer to the sampling device 3 than the horizontal hollow portion 42 of the vertical hollow portion 41.
【００２０】次に空輸配管６について説明する。このも
のは図１に示すように、導管４の垂直中空部４１の排出
部に接続された仕切弁８２と、流動層処理装置２におけ
る流動室２１とを接続するように具えられる中空部材で
ある。従ってサンプリング装置３から導管４を経由した
粉粒体Ｇは、仕切弁８２が開放されているときは空輸配
管６に到り、流動室２１内へと移送される。Next, the air piping 6 will be described. As shown in FIG. 1, this is a hollow member provided to connect the sluice valve 82 connected to the discharge portion of the vertical hollow portion 41 of the conduit 4 and the flow chamber 21 in the fluidized bed processing apparatus 2. . Therefore, the granular material G from the sampling device 3 via the conduit 4 reaches the air transportation pipe 6 when the sluice valve 82 is opened, and is transferred into the flow chamber 21.
【００２１】次にレーザ光式粒径センサ５について説明
する。このものは既存のセンサであり、図４に示すよう
に、Ｈｅ−Ｎｅレーザ５１から発射され、コリメータ５
２を経たレーザ光が、粉粒体Ｇによりラマン散乱した光
をセンサ５３により受光し、その強さ等から散乱物質で
ある粉粒体Ｇの粒径を測定するものである。ラマン効果
を利用しているため散乱光の波長が発射光と異なるので
ＳＮ比が高く、高精度の測定が可能である。またサンプ
リング周期は０．６〜５００ｍｓの範囲で可変である。
そして前記レーザ光が、導管４における水平中空部４２
を通過するように配置される。なお本実施例ではレーザ
光散乱式の粒径センサを用いたが、レーザ光回折法等の
粒径センサを用いてもよい。Next, the laser beam type particle size sensor 5 will be described. This is an existing sensor, and as shown in FIG. 4, it is emitted from a He-Ne laser 51 and collimator 5
The laser light passing through 2 receives light Raman-scattered by the granular material G by the sensor 53, and measures the particle size of the granular material G, which is a scattering substance, from its intensity and the like. Since the Raman effect is used, the wavelength of scattered light is different from that of emitted light, so the SN ratio is high and highly accurate measurement is possible. The sampling period is variable within the range of 0.6 to 500 ms.
Then, the laser light is emitted from the horizontal hollow portion 42 of the conduit 4.
Is arranged to pass through. Although the laser light scattering type particle size sensor is used in this embodiment, a particle size sensor such as a laser beam diffraction method may be used.
【００２２】次にコンピュータ７について説明する。こ
のものは既存のパソコンであり、粒子加工に必要な平均
粒子径、均一度、粒度分布等を演算し、その結果を出力
する。またこの出力値はＪＩＳ規格のふるいに準拠して
いる。なお、本実施例ではコンピュータ７にパソコンを
用いたが、シングルボードコンピュータやＥＷＳ等を用
いてもよい。Next, the computer 7 will be described. This is an existing personal computer, which calculates the average particle size, uniformity, particle size distribution, etc. necessary for particle processing, and outputs the results. The output value complies with the JIS standard sieve. Although a personal computer is used as the computer 7 in this embodiment, a single board computer, EWS or the like may be used.
【００２３】上述したように構成される粒度測定装置１
に対し粉粒体Ｇは、導管４における垂直中空部４１内を
重力で落下し、落下中に水平中空部４２両側面に設けた
反射防止コーティングガラス４３間のほぼ中心を通過
し、その際に照射されているレーザ光により粒子径の測
定が行なわれる。この際、反射防止コーティングガラス
４３部にはガラスへの粉粒体Ｇの付着による外乱を避け
るためにガラス面に対してエアパージされている。Particle size measuring device 1 constructed as described above
On the other hand, the granular material G falls by gravity in the vertical hollow portion 41 of the conduit 4, and during the fall, passes through almost the center between the antireflection coating glasses 43 provided on both side surfaces of the horizontal hollow portion 42, and at that time, The particle diameter is measured by the irradiated laser light. At this time, the glass surface of 43 parts of the antireflection coating is air-purged in order to avoid the disturbance due to the adhesion of the granular material G to the glass.
【００２４】粉粒体Ｇのサンプリングは連続的に可能で
あるが、実用上は間欠的にサンプリングを行えば充分粒
子成長に対しての対応が可能であり、例えば数十秒に一
度エアモータ３３を回転させてサンプリングを行い、必
要なデータを取ればよく、サンプリング量は最小限でよ
い。このような一連の測定を行うにあたっては、仕切弁
８１を開放し仕切弁８２及びリーク弁８３を閉鎖する。
粒径測定のなされた粉粒体Ｇは、垂直中空部４１排出部
付近に溜まる。この粉粒体Ｇを流動室２１に返送するに
あたっては、仕切弁８１を閉鎖し、仕切弁８２及びリー
ク弁８３を開放する。流動層処理装置２は通常負圧で運
転されているので、リーク弁８３から外気が進入し導管
４、仕切弁８２及び空輸配管６を経由して流動室２１内
へと達するとともに、粉粒体Ｇを空輸する。粉粒体Ｇを
流動室２１に返送するにあたって別の方法として仕切弁
８１及びリーク弁８３を閉鎖し、仕切弁８２を開放す
る。このようにすると反射防止コーティングガラス４３
部にパージしているエアにより、粉粒体Ｇは流動室２１
内へ戻されるので、粒度測定による製品の損失がなくな
る。また、粉粒体Ｇを外部に取り出すときには、仕切弁
８１及び仕切弁８２を閉鎖し、リーク弁８３を開放すれ
ばここから垂直中空部４１排出部付近に溜まった粉粒体
Ｇを取り出すことができる。The powder G can be continuously sampled, but in practice, intermittent sampling can sufficiently cope with particle growth. For example, the air motor 33 can be set once every several tens of seconds. Sampling can be performed by rotating and sampling, and necessary data can be obtained, and the sampling amount can be minimized. In performing such a series of measurements, the gate valve 81 is opened and the gate valve 82 and the leak valve 83 are closed.
The granular material G whose particle size has been measured is collected near the discharge portion of the vertical hollow portion 41. When returning the granular material G to the flow chamber 21, the gate valve 81 is closed and the gate valve 82 and the leak valve 83 are opened. Since the fluidized bed processing apparatus 2 is normally operated at a negative pressure, outside air enters from the leak valve 83 and reaches the inside of the fluidized chamber 21 via the conduit 4, the partition valve 82 and the air transportation pipe 6, and the granular material Air transport G. As another method for returning the granular material G to the flow chamber 21, the sluice valve 81 and the leak valve 83 are closed and the sluice valve 82 is opened. In this way, the antireflection coating glass 43
Due to the air that is being purged into the part, the granular material G is moved to the flow chamber 21.
As it is put back in, there is no loss of product due to particle size measurement. Further, when taking out the granular material G to the outside, if the sluice valve 81 and the sluice valve 82 are closed and the leak valve 83 is opened, the granular material G accumulated near the discharge portion of the vertical hollow portion 41 can be taken out from here. it can.
【００２５】上述したようにして行われるレーザ光式粒
径センサ５による所要測定時間は約２秒であり、この間
に２００回の測定を行い、その平均を演算して出力する
ことが可能である。またレーザ光式粒度センサ５は１μ
ｍ〜２０００μｍまでの非常に広い範囲の粒径を、１台
のセンサで測定することが可能であり、通常の造粒操作
における粒度範囲を全てカバーしている。また本装置か
らの出力はＪＩＳ規格のふるいに準拠しており、従来一
般的に用いられている粒度測定法との比較が容易に可能
である。The required measurement time by the laser light type particle size sensor 5 performed as described above is about 2 seconds, during which 200 measurements can be performed and the average thereof can be calculated and output. . In addition, the laser beam type particle size sensor 5 is 1 μ
It is possible to measure a very wide range of particle sizes from m to 2000 μm with a single sensor, which covers the entire particle size range in a normal granulation operation. Further, the output from this device complies with the JIS standard sieve, and can be easily compared with the particle size measuring method generally used conventionally.
【００２６】本発明の流動層処理装置２における粉粒体
Ｇの粒度測定装置１の構成及び使用方法は前記したとお
りであり、以下具体的なデータを示し、αコーンスター
チを３ｋｇ仕込み、結合剤に水を用いて造粒した実施例
について説明する。The structure and method of use of the particle size measuring apparatus 1 for the powdery or granular material G in the fluidized bed processing apparatus 2 of the present invention are as described above. The concrete data are shown below, 3 kg of α corn starch was charged, and the binder was used. An example of granulating with water will be described.
【００２７】まず、造粒開始後から流動室２１からのサ
ンプリングを行い、同時にレーザ光式粒径センサ５での
測定を行った平均粒子径と、従来より用いているふるい
分け法で測定した結果とを比較したグラフを図５に示
す。横軸はふるい分け法による計測粒子径であり、縦軸
はレーザ法による計測粒子径である。計測は平均粒子径
がＤ２０、Ｄ５０、Ｄ８０の三種類をオフライン、オン
ラインでそれぞれ行った。First, after the granulation was started, sampling from the flow chamber 21 was performed, and at the same time, the average particle diameter measured by the laser beam type particle size sensor 5 and the result measured by the sieving method used conventionally. A graph comparing the above is shown in FIG. The horizontal axis is the particle diameter measured by the sieving method, and the vertical axis is the particle diameter measured by the laser method. The measurement was performed offline and online for three types of average particle diameters of D20, D50, and D80, respectively.
【００２８】レーザ光式粒径センサ５で測定した平均粒
子径は、ふるい分け法で測定した結果と非常によく一致
しており、従来不可能であった造粒中の流動室２１内の
粉粒体Ｇの状態をリアルタイムで把握することが可能で
ある。The average particle size measured by the laser beam type particle size sensor 5 is very well in agreement with the result measured by the sieving method, and the powder particles in the flow chamber 21 during granulation, which has been impossible in the past, can be obtained. It is possible to grasp the state of the body G in real time.
【００２９】また本発明の粒度測定装置１は、流動層処
理装置２のみならず、例えば一般の乾燥装置、粉体の貯
留装置、輸送中の配管内の粉体、等々、粉体を扱う装置
に適用ができる。Further, the particle size measuring apparatus 1 of the present invention is not limited to the fluidized bed processing apparatus 2, but may be an apparatus for handling powder such as a general drying apparatus, a powder storage apparatus, powder in a pipe during transportation, etc. Can be applied to.
【００３０】[0030]
【発明の効果】本発明は以上述べたような構成を有する
ものであり、以下のような効果を奏する。まず請求項１
記載の発明によれば、サンプリング装置３によって粉粒
体Ｇを定量的にサンプリングし、サンプリングした粉粒
体Ｇを導管４によってレーザ光式粒径センサ５に導き粒
径測定を行い、コンピュータにより測定データを解析
し、平均粒子径、均一度、粒度分布、等の項目を算出す
る。The present invention has the structure as described above, and has the following effects. First, claim 1
According to the invention described above, the sampling device 3 quantitatively samples the granular material G, the sampled granular material G is guided to the laser light type particle size sensor 5 by the conduit 4, and the particle size is measured and measured by the computer. The data is analyzed and items such as average particle size, uniformity, particle size distribution, etc. are calculated.
【００３１】また請求項２記載の発明によれば、前記導
管４の水平中空部４２の両端部分には反射防止コーティ
ングガラス４３を具えるので、レーザ光式粒径センサ５
のレーザ光を反射、散乱することなく透過する。According to the second aspect of the present invention, since the antireflection coating glass 43 is provided at both ends of the horizontal hollow portion 42 of the conduit 4, the laser light type particle size sensor 5 is provided.
The laser light of is reflected and transmitted without being scattered.
【００３２】更にまた請求項３記載の発明によれば、前
記反射防止コーティングガラス４３の内側には、エアパ
ージ機構４４を具えるので、反射防止コーティングガラ
ス４３への粉粒体Ｇの付着を回避する。Furthermore, according to the third aspect of the invention, since the air purging mechanism 44 is provided inside the antireflection coating glass 43, the adhesion of the powder or granules G to the antireflection coating glass 43 is avoided. .
【００３３】更にまた請求項４記載の発明によれば、前
記水平中空部４２の上下にはそれぞれ仕切弁８１、８２
を具え、更にこれら仕切弁８１、８２の間にリーク弁８
３を具えるので、これら弁の切り替えにより、粉粒体Ｇ
の移動経路を選択すことができる。Further, according to the invention of claim 4, sluice valves 81 and 82 are provided above and below the horizontal hollow portion 42, respectively.
And a leak valve 8 between the sluice valves 81 and 82.
3 is provided, so by switching these valves, powder G
It is possible to select the moving route of.
【００３４】更にまた請求項５記載の発明によれば、前
記導管４と流動室２１とを連結する空輸配管６を設け、
粉粒体Ｇが流動室２１に返送される経路を形成するの
で、測定された粉粒体Ｇを流動室２１に返送する。これ
らによって造粒操作等の粉粒体Ｇ加工時、処理容器内の
粉粒体Ｇをサンプリングし、レーザ光式センサ５で粉粒
体Ｇを測定することにより、粉粒体Ｇの状態をリアルタ
イムで測定することが可能となり、測定結果を操作因子
の制御に用いることにより最適な造粒制御を行うことが
できるため、品質の安定化、生産の合理化に極めて有効
である。更に、測定は既存の流動層処理装置２に後付け
される粒度測定装置１により、流動室２１外部にて行わ
れるため、サニタリー性、洗浄性での問題もなくなる。
またこれまで困難であった造粒のメカニズム解析等への
応用が可能である。Further, according to the invention of claim 5, an air transportation pipe 6 for connecting the conduit 4 and the flow chamber 21 is provided,
Since the granular material G forms a path for returning to the fluid chamber 21, the measured granular material G is returned to the fluid chamber 21. By these, during the processing of the granular material G such as granulation operation, the granular material G in the processing container is sampled and the granular material G is measured by the laser light type sensor 5, so that the state of the granular material G can be real time. Since it is possible to perform the measurement, the optimum granulation control can be performed by using the measurement result for the control of the operation factor, which is extremely effective for stabilizing the quality and rationalizing the production. Furthermore, since the measurement is performed outside the fluidizing chamber 21 by the particle size measuring device 1 that is attached to the existing fluidized bed processing device 2, there is no problem in sanitary property and cleaning property.
It can also be applied to the analysis of the mechanism of granulation, which has been difficult until now.
【図１】本発明の粒度測定装置を流動層造粒装置に付設
した状態を示す骨格図である。FIG. 1 is a skeleton diagram showing a state in which a particle size measuring device of the present invention is attached to a fluidized bed granulating device.
【図２】サンプリング装置を示す縦断側面図である。FIG. 2 is a vertical side view showing a sampling device.
【図３】導管を示す縦断側面図である。FIG. 3 is a vertical side view showing a conduit.
【図４】レーザ光式粒径センサの内部構造を模式的に示
すブロック図である。FIG. 4 is a block diagram schematically showing an internal structure of a laser beam particle size sensor.
【図５】ふるい分け法による計測粒子径と本発明の粒度
測定装置による計測粒子径を比較するグラフである。FIG. 5 is a graph comparing the particle size measured by the sieving method and the particle size measured by the particle size measuring device of the present invention.
１ 粒度測定装置 ２ 流動層処理装置 ３ サンプリング装置 ４ 導管 ５ レーザ光式粒径センサ ６ 空輸配管 ７ コンピュータ ２１ 流動室 ２２ サンプリングノズル ２３ 噴霧室 ２４ 噴霧ノズル ３１ ケーシング ３２ スクリュー ３３ エアモータ ３４ 粒子取入口 ４１ 垂直中空部 ４２ 水平中空部 ４３ 反射防止コーティングガラス ４４ エアパージ機構 ４５ エア吹出口 ４６ 配管継手 ５１ Ｈｅ−Ｎｅレーザ ５２ コリメータ ５３ センサ ８１ 仕切弁 ８２ 仕切弁 ８３ リーク弁 Ｇ 粉粒体 1 Particle Size Measuring Device 2 Fluidized Bed Processing Device 3 Sampling Device 4 Conduit 5 Laser Light Type Particle Size Sensor 6 Air Transport Piping 7 Computer 21 Flowing Chamber 22 Sampling Nozzle 23 Spraying Chamber 24 Spraying Nozzle 31 Casing 32 Screw 33 Air Motor 34 Particle Intake 41 Vertical Hollow part 42 Horizontal hollow part 43 Anti-reflection coating glass 44 Air purge mechanism 45 Air outlet 46 Piping joint 51 He-Ne laser 52 Collimator 53 Sensor 81 Gate valve 82 Gate valve 83 Leak valve G Granules
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成６年７月１３日[Submission date] July 13, 1994
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図５[Name of item to be corrected] Figure 5
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図５】 [Figure 5]
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山崎 一正 静岡県榛原郡吉田町神戸1235 株式会社大 川原製作所内 (72)発明者 田畑 浩治 静岡県榛原郡吉田町神戸1235 株式会社大 川原製作所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazumasa Yamazaki 1235, Okawara Manufacturing Co., Ltd., Yoshida-cho, Haibara-gun, Shizuoka Prefecture (72) Inventor Koji Tabata 1235 Kobe, Yoshida-cho, Shizuoka Prefecture
Claims (5)
行う流動層処理装置の適所に接続されるサンプリング装
置と、このサンプリング装置から連通状態に分岐するよ
うに取り付けられた導管と、前記導管と交差状に組み合
わされるレーザ光式粒径センサと、前記粒径センサの出
力をデータ処理するコンピュータとを具えることを特徴
とする、流動層処理装置における粉粒体の粒度測定装
置。1. A sampling device connected to an appropriate place of a fluidized bed processing device for drying, granulating, coating, etc. of powder and granules, and a conduit attached so as to branch from the sampling device into a communicating state, A particle size measuring device for powder particles in a fluidized bed processing device, comprising: a laser beam particle size sensor that is combined with a conduit in a cross shape; and a computer that processes the output of the particle size sensor.
ーザ光が通過する水平中空部と、粉粒体の自由落下経路
となる垂直中空部とから成り、水平中空部の両端部分に
は反射防止コーティングガラスを具えることを特徴とす
る、請求項１記載の流動層処理装置における粉粒体の粒
度測定装置。2. The conduit is composed of a horizontal hollow portion through which the laser light of the laser light type particle size sensor passes, and a vertical hollow portion that serves as a free fall path for powder particles, and both end portions of the horizontal hollow portion are provided. The particle size measuring apparatus for powder particles in a fluidized bed processing apparatus according to claim 1, characterized by comprising antireflection coated glass.
には、エアパージ機構を具えることを特徴とする、請求
項１または２記載の流動層処理装置における粉粒体の粒
度測定装置。3. The particle size measuring apparatus for a powder or granular material in a fluidized bed processing apparatus according to claim 1, wherein an air purging mechanism is provided inside the antireflection coating glass.
弁を具え、更にこれら仕切弁の間にリーク弁を具えるこ
とを特徴とする、請求項１、２または３記載の流動層処
理装置における粉粒体の粒度測定装置。4. The fluidized bed treatment apparatus according to claim 1, wherein a partition valve is provided above and below said horizontal hollow portion, and a leak valve is provided between these partition valves. Particle size measuring device for powder and granular material.
を設け、粉粒体が流動室に返送される経路を形成するこ
とを特徴とする、請求項１、２、３または４記載の流動
層処理装置における粉粒体の粒度測定装置。5. The air transport pipe for connecting the conduit and the flow chamber is provided to form a path for returning the granular material to the flow chamber, according to claim 1, 2, 3 or 4. Particle size measuring device for powder particles in fluidized bed processing equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6152795A JPH07333113A (en) | 1994-06-10 | 1994-06-10 | Particle size measuring apparatus for powder/grain in fluidized bed treating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6152795A JPH07333113A (en) | 1994-06-10 | 1994-06-10 | Particle size measuring apparatus for powder/grain in fluidized bed treating apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07333113A true JPH07333113A (en) | 1995-12-22 |
Family
ID=15548319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6152795A Pending JPH07333113A (en) | 1994-06-10 | 1994-06-10 | Particle size measuring apparatus for powder/grain in fluidized bed treating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07333113A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100947035B1 (en) * | 2008-02-28 | 2010-03-10 | 김영훈 | Analysis System for Air of Harmful Environment by IR Spectroscopy |
| JP2014039179A (en) * | 2012-08-17 | 2014-02-27 | Chino Corp | Monitoring window purge structure |
| CN104236951A (en) * | 2013-06-12 | 2014-12-24 | 阿克森斯公司 | Device for sampling solids from a sealed enclosure and method using same |
| JP2018151273A (en) * | 2017-03-14 | 2018-09-27 | 沢井製薬株式会社 | Particle diameter measuring method, particle diameter measuring apparatus and quality control method using the same |
| US10151677B2 (en) | 2014-07-08 | 2018-12-11 | Halliburton Energy Services, Inc. | Real-time optical flow imaging to determine particle size distribution |
Citations (7)
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|---|---|---|---|---|
| JPS62175645A (en) * | 1986-01-30 | 1987-08-01 | Nikkiso Co Ltd | Online automatic powdery and granular material grain size analyzer |
| JPS6337889B2 (en) * | 1981-03-19 | 1988-07-27 | Boeicho Gijutsu Kenkyu Honbucho | |
| JPH0234603Y2 (en) * | 1985-02-20 | 1990-09-18 | ||
| JPH0310145A (en) * | 1989-06-08 | 1991-01-17 | Okawara Mfg Co Ltd | Moisture detecting device in fluid-bed processing apparatus |
| JPH0466567U (en) * | 1990-10-19 | 1992-06-11 | ||
| JPH0566190A (en) * | 1990-11-22 | 1993-03-19 | Satake Eng Co Ltd | Device and method for analyzing fine particle and grinder roll interval adjustor using it |
| JPH05285363A (en) * | 1992-04-09 | 1993-11-02 | Powrex:Kk | Controlling device for particle working equipment |
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1994
- 1994-06-10 JP JP6152795A patent/JPH07333113A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6337889B2 (en) * | 1981-03-19 | 1988-07-27 | Boeicho Gijutsu Kenkyu Honbucho | |
| JPH0234603Y2 (en) * | 1985-02-20 | 1990-09-18 | ||
| JPS62175645A (en) * | 1986-01-30 | 1987-08-01 | Nikkiso Co Ltd | Online automatic powdery and granular material grain size analyzer |
| JPH0310145A (en) * | 1989-06-08 | 1991-01-17 | Okawara Mfg Co Ltd | Moisture detecting device in fluid-bed processing apparatus |
| JPH0466567U (en) * | 1990-10-19 | 1992-06-11 | ||
| JPH0566190A (en) * | 1990-11-22 | 1993-03-19 | Satake Eng Co Ltd | Device and method for analyzing fine particle and grinder roll interval adjustor using it |
| JPH05285363A (en) * | 1992-04-09 | 1993-11-02 | Powrex:Kk | Controlling device for particle working equipment |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100947035B1 (en) * | 2008-02-28 | 2010-03-10 | 김영훈 | Analysis System for Air of Harmful Environment by IR Spectroscopy |
| JP2014039179A (en) * | 2012-08-17 | 2014-02-27 | Chino Corp | Monitoring window purge structure |
| CN104236951A (en) * | 2013-06-12 | 2014-12-24 | 阿克森斯公司 | Device for sampling solids from a sealed enclosure and method using same |
| US10151677B2 (en) | 2014-07-08 | 2018-12-11 | Halliburton Energy Services, Inc. | Real-time optical flow imaging to determine particle size distribution |
| JP2018151273A (en) * | 2017-03-14 | 2018-09-27 | 沢井製薬株式会社 | Particle diameter measuring method, particle diameter measuring apparatus and quality control method using the same |
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