JP2003194465A - Method for drying powder and grain - Google Patents

Method for drying powder and grain

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Publication number
JP2003194465A
JP2003194465A JP2001395909A JP2001395909A JP2003194465A JP 2003194465 A JP2003194465 A JP 2003194465A JP 2001395909 A JP2001395909 A JP 2001395909A JP 2001395909 A JP2001395909 A JP 2001395909A JP 2003194465 A JP2003194465 A JP 2003194465A
Authority
JP
Japan
Prior art keywords
drying
granular material
powder
type container
silo
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
Application number
JP2001395909A
Other languages
Japanese (ja)
Inventor
Noriyuki Hisanishi
律行 久西
Hiroshi Tanaka
洋志 田中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Idemitsu Petrochemical Co Ltd
Original Assignee
Idemitsu Petrochemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Idemitsu Petrochemical Co Ltd filed Critical Idemitsu Petrochemical Co Ltd
Priority to JP2001395909A priority Critical patent/JP2003194465A/en
Publication of JP2003194465A publication Critical patent/JP2003194465A/en
Pending legal-status Critical Current

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  • Drying Of Solid Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for uniformly and efficiently drying powder and grain with high adhesive property and low fluidity such as powder and grain formed of a polymer containing a polymerization solvent. <P>SOLUTION: In drying the powder and grain in contact with drying gas in a silo type container, the silo type container having a quantitative discharge mechanism at the bottom part is used, and the drying gas is supplied from the lower end part. <P>COPYRIGHT: (C)2003,JPO

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、粉粒体の乾燥方法
に関し、更に詳しくは、粉粒体をサイロ型容器内で乾燥
用ガスと接触させて乾燥するに際し、底部に定量排出機
構を有するサイロ型容器を用い、且つ乾燥用ガスを下端
部より供給することにより、高付着性で低流動性の粉粒
体を均一に、且つ効率良く乾燥する方法に関するもので
ある。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for drying powder or granules, and more specifically, it has a fixed amount discharging mechanism at the bottom when the powder or granules are dried by bringing them into contact with a drying gas in a silo type container. The present invention relates to a method for uniformly and efficiently drying powder particles having high adhesiveness and low fluidity by using a silo type container and supplying a drying gas from the lower end.

【0002】[0002]

【従来の技術】粉粒体を乾燥する単位操作は工業的には
多く実施されている。一般に、粉粒体の乾燥操作におい
ては、時間×温度が効率を決める因子であり、高い効率
を得るには、できるだけ温度を上げて、かつ十分な滞留
時間を確保して乾燥することが必要である。しかしなが
ら、温度については、粉粒体の品質上、上限が存在する
ことが多いため、十分な滞留時間を確保することにより
乾燥効率を高める方法を選ぶこととなる。しかし、従来
から粉粒体の乾燥装置として知られている回転乾燥機
は、十分な滞留時間を確保できないことが多く、また機
器が高価となる。また、容器で回分式で乾燥する方法も
あるが、工業的規模で行う場合には、処理効率が大きく
低下する。
2. Description of the Related Art A lot of unit operations for drying powders are carried out industrially. Generally, in the drying operation of powder and granules, time x temperature is a factor that determines the efficiency, and in order to obtain high efficiency, it is necessary to raise the temperature as much as possible and secure a sufficient residence time for drying. is there. However, regarding the temperature, there is often an upper limit in terms of the quality of the granular material, and therefore a method of increasing the drying efficiency by ensuring a sufficient residence time will be selected. However, the rotary dryer conventionally known as a drying apparatus for powder and granular materials often cannot secure a sufficient residence time, and the equipment becomes expensive. Also, there is a method of drying in a container by a batch method, but when it is carried out on an industrial scale, the treatment efficiency is greatly reduced.

【0003】これに対し、滞留時間を確保し得る方法と
して、サイロ型容器を使用した乾燥方法が知られている
が、この方法においても、対象とする粉粒体が、付着性
が高くて流動性が低いものである場合は、サイロ内でラ
ットホールができたり、偏流が起こって、温度分布が不
均一になるなどの現象が起こり、目標とする乾燥度合い
が得られないことが多い。特に、重合溶剤を含有する重
合体からなる粉粒体、例えば、界面重縮合法で得られた
塩化メチレンを含有するポリカーボネートからなる粉粒
体である場合には、乾燥により可能な限り重合溶剤を除
去することが求められるにもかかわらず、内部で均一な
流動が得られなかったり、定量的な排出が得られなかっ
たりするため、処理し得る粉粒体の性状に限界があっ
た。
On the other hand, a drying method using a silo type container is known as a method capable of ensuring a retention time, and in this method, the target powder or granules are highly adherent and flowable. In the case where the property is low, a phenomenon such as a rathole being formed in the silo or a non-uniform temperature distribution due to uneven flow occurs, and a target degree of dryness cannot be obtained in many cases. Particularly, in the case of a powder or granular material made of a polymer containing a polymerization solvent, for example, a powder or granular material made of a polycarbonate containing methylene chloride obtained by an interfacial polycondensation method, the polymerization solvent should be dried as much as possible. Although it is required to be removed, a uniform fluidity cannot be obtained inside or a quantitative discharge cannot be obtained, so that there is a limit to the properties of the powdery particles that can be treated.

【0004】[0004]

【発明が解決しようとする課題】本発明は、このような
状況下で、粉粒体をサイロ型容器内で乾燥用ガスと接触
させて乾燥するに際し、内部での均一な流動と定量的な
排出が得られる、特に、高付着性で低流動性の粉粒体を
均一に、且つ効率良く乾燥する方法を提供することを目
的とするものである。
SUMMARY OF THE INVENTION Under the circumstances, the present invention provides a uniform internal flow and a quantitative flow when the powder and granules are dried by bringing them into contact with a drying gas in a silo type container. It is an object of the present invention to provide a method for uniformly and efficiently drying a granular material which can be discharged, and which has high adhesiveness and low fluidity.

【0005】[0005]

【課題を解決するための手段】本発明者らは、前記目的
を達成するために鋭意研究を重ねた結果、底部に定量排
出機構を有するサイロ型容器を用い、且つ乾燥用ガスを
下端部より供給することにより、その目的を達成し得る
ことを見出した。本発明は、かかる知見に基づいて完成
したものである。
Means for Solving the Problems As a result of intensive studies to achieve the above-mentioned object, the present inventors have used a silo type container having a fixed amount discharge mechanism at the bottom and drying gas from the lower end. It was found that the objective can be achieved by supplying. The present invention has been completed based on such findings.

【0006】すなわち、本発明は、(1)粉粒体をサイ
ロ型容器内で乾燥用ガスと接触させて乾燥するに際し、
底部に定量排出機構を有するサイロ型容器を用い、且つ
乾燥用ガスを下端部より供給することを特徴とする粉粒
体の乾燥方法、(2)定量排出機構が、水平方向に回転
するテーブルを用いて粉粒体を定量的に切出して排出す
る機構である、上記(1)の粉粒体の乾燥方法、(3)
粉粒体が、安息角35°以上の低流動性の粉粒体である
上記(1)又は(2)記載の粉粒体の乾燥方法、(4)
粉粒体が、重合溶剤を含有する重合体からなる粉粒体で
ある上記(1)〜(3)の何れかの粉粒体の乾燥方法、
及び(5)粉粒体が、界面重縮合法で得られた塩化メチ
レンを含有するポリカーボネートである、上記(4)の
粉粒体の乾燥方法、を提供するものである。
That is, according to the present invention, (1) when the powder or granular material is dried by bringing it into contact with a drying gas in a silo type container,
A method of drying powdery or granular material, characterized by using a silo type container having a fixed amount discharge mechanism at the bottom and supplying a drying gas from the lower end, (2) The fixed amount discharge mechanism uses a horizontally rotating table. A method for quantitatively cutting and discharging the powder or granules using the method, the method for drying powder or granules according to (1) above, or (3)
The method for drying a powder or granule according to the above (1) or (2), wherein the powder or granule is a low-flowable powder having a repose angle of 35 ° or more.
The method for drying a granular material according to any one of (1) to (3) above, wherein the granular material is a granular material made of a polymer containing a polymerization solvent.
And (5) the method for drying a powder or granule according to the above (4), wherein the powder or granule is a polycarbonate containing methylene chloride obtained by an interfacial polycondensation method.

【0007】[0007]

【発明の実施の形態】本発明の粉粒体の乾燥方法は、対
象とする粉粒体としては、サイロ内で流動性があり、か
つ供給機構、排出機構等の付属機器で扱える範囲の粒径
を有する物であれば特に制約はないが、重合溶剤を含有
する重合体、例えば、ポリカーボネート樹脂、ポリエス
テル樹脂、ポリメチルメタクリレート樹脂、ポリアリレ
ート樹脂、ポリアミド樹脂、ポリオレフィン樹脂などの
熱可塑性樹脂からなる粉粒体が挙げられ、特に二価フェ
ノールとカーボネート前駆体とを塩化メチレンを有機溶
剤として界面重縮合法で反応させて得られた、塩化メチ
レンを含有するポリカーボネート樹脂の乾燥に好適に用
いられる。また、本発明は、高付着性で低流動性の粉粒
体、特に安息角35°以上の粉粒体により好適に適用で
きる。
BEST MODE FOR CARRYING OUT THE INVENTION In the method for drying a granular material of the present invention, the targeted granular material has a fluidity in the silo and is within a range that can be handled by auxiliary equipment such as a supply mechanism and a discharge mechanism. There is no particular limitation as long as it has a diameter, but it is made of a polymer containing a polymerization solvent, for example, a thermoplastic resin such as a polycarbonate resin, a polyester resin, a polymethylmethacrylate resin, a polyarylate resin, a polyamide resin, or a polyolefin resin. Examples thereof include powder and granules, which are preferably used for drying a methylene chloride-containing polycarbonate resin obtained by reacting a dihydric phenol and a carbonate precursor by an interfacial polycondensation method using methylene chloride as an organic solvent. Further, the present invention can be preferably applied to powder particles having high adhesiveness and low fluidity, particularly powder particles having an angle of repose of 35 ° or more.

【0008】本発明で使用する装置及び乾燥方法を、図
面に基づいて説明する。図1は、本発明で使用する装置
を示すものであり、乾燥サイロ型容器1は、周囲に保温
用のジャケット2を、底部に定量排出機構3を、下端部
に加熱装置4で加熱された乾燥用ガスを噴出する分散板
5を、各々有している。定量排出機構3は、水平方向に
回転するテーブルを用いて、粉粒体を、スクレーパーす
き間の高さや回転速度等を調整することなどにより、定
量的に切出して排出する機構である。かかる定量排出機
構は、通常粉体用機器として、テーブルフィーダー、サ
ークルフィーダーの一般名称で呼ばれているものであ
り、サークルフィーダー〔ヨシカワ(株)〕、つばきサ
ークルフィーダー〔TUBAKIMOTO BULK SYSTEMCORP〕、テ
ーブルディスチャージャー〔アイシン精機(株)〕、テ
ーブルフィーダー〔東亜機械(株)〕、フンケンオート
フィーダー〔粉研パウテックス(株)〕、ハイフロー
〔赤武エンジアリング(株)〕などとして市販されてい
るものが使用し得る。
An apparatus and a drying method used in the present invention will be described with reference to the drawings. FIG. 1 shows an apparatus used in the present invention. A dry silo-type container 1 is heated by a jacket 2 for keeping heat around, a fixed amount discharging mechanism 3 at the bottom, and a heating device 4 at the lower end. Each has a dispersion plate 5 for ejecting a drying gas. The quantitative discharging mechanism 3 is a mechanism that quantitatively cuts and discharges the granular material by adjusting the height of the scraper gap, the rotation speed, and the like using a table that rotates in the horizontal direction. Such a quantitative discharging mechanism is generally called as a powder feeder by a general name of a table feeder and a circle feeder, and a circle feeder [Yoshikawa Co., Ltd.], a camellia circle feeder [TUBAKIMOTO BULK SYSTEM CORP], a table disk. Charger [Aisin Seiki Co., Ltd.], table feeder [Toa Machine Co., Ltd.], Funken Auto Feeder [Koken Powtex Co., Ltd.], High Flow [Akatake Engineering Co., Ltd.] You can

【0009】乾燥用ガスを乾燥サイロ型容器内に導入・
噴出する方法としては、図2(a)の如く定量排出機構
の軸部を利用する方法(この場合、軸パージ兼用として
も良い。)、図2(b)の如く乾燥サイロ型容器の底面
部にスリット、ホール、多孔板等を設ける方法、図2
(c)(及び図1)の如く底面部に近い位置に、粉粒体
の流動を阻害しない形状、大きさの構造物(分散板等)
を設ける方法などが採用し得る。なお、本発明において
は、乾燥サイロ型容器の底面部及びそれに近い位置を合
わせて、乾燥サイロ型容器の下端部と云う。
Introduce a drying gas into a dry silo type container
As a jetting method, as shown in FIG. 2 (a), a shaft portion of a fixed amount discharging mechanism is used (in this case, it may be used also as a shaft purge), and as shown in FIG. 2 (b), a bottom portion of a dry silo-type container. Method for providing slits, holes, perforated plates, etc. on the substrate, Fig. 2
As shown in (c) (and FIG. 1), a structure (dispersion plate, etc.) having a shape and size that does not impede the flow of powder or granular material at a position close to the bottom surface.
Can be adopted. In the present invention, the bottom portion of the dry silo type container and the position near it are referred to as the lower end portion of the dry silo type container.

【0010】次に、本発明の粉粒体の乾燥方法を説明す
る。粉粒体6は、粉粒体供給設備11より乾燥サイロ型
容器1の上部に一定量ずつ供給され、下方から上昇して
くる乾燥用ガスにより乾燥サイロ型容器内で流動しなが
ら、且つジャケット2により一定温度に保たれながら一
定時間滞留し、定量排出機構3により一定量ずつ排出さ
れる。乾燥を効率良く行う為には、粉粒体6は、粉粒体
供給設備11内で、例えば加熱機構12によって乾燥用
ガスの温度と同じか又は近い温度にまで予め加熱された
後に、乾燥サイロ型容器内に供給されるのが、好まし
い。乾燥用ガスは、対象とする粉粒体の性状等によって
適宜選択されるが、一般には空気、窒素ガスが使用され
る。また、乾燥用ガスの供給速度は、処理される粉粒体
の乾燥状態に応じて適宜選択されるが、乾燥サイロ型容
器から排出される乾燥用ガスに同伴されるのを防止する
ために、出来るだけ乾燥サイロ型容器内の最小流動化速
度よりも小さい速度とするのが好ましい。上記の乾燥方
法は、回分式、連続式の何れでも実施できるが、サイロ
型容器での乾燥は長時間を要することが多く、工業的に
は連続式が好ましい。
Next, a method for drying the powder or granule of the present invention will be described. The powder or granular material 6 is supplied from the powder or granular material supply equipment 11 to the upper part of the dry silo type container 1 at a constant amount, and while flowing in the dry silo type container by the drying gas rising from below, the jacket 2 Is retained for a certain period of time while being maintained at a constant temperature, and is discharged by a fixed amount by the fixed amount discharging mechanism 3. In order to perform the drying efficiently, the powdery or granular material 6 is preheated in the powdery or granular material supply equipment 11 to a temperature equal to or close to the temperature of the drying gas, for example, by the heating mechanism 12, and then the drying silo. It is preferably supplied in a mold container. The drying gas is appropriately selected depending on the properties of the target powder and granules, etc., but generally air or nitrogen gas is used. Further, the supply rate of the drying gas is appropriately selected according to the dry state of the granular material to be treated, but in order to prevent entrainment in the drying gas discharged from the drying silo-type container, It is preferable that the speed is as low as possible less than the minimum fluidization speed in the dry silo container. The above-mentioned drying method can be carried out in either a batch system or a continuous system, but drying in a silo type container often takes a long time, and the continuous system is industrially preferable.

【0011】[0011]

【実施例】次に、本発明を実施例により、さらに詳細に
説明するが、本発明は、これらの例によってなんら限定
されるものではない。
EXAMPLES The present invention will now be described in more detail with reference to examples, but the present invention is not limited to these examples.

【0012】実施例1 図1に示した連続式粉粒体乾燥装置を使用して、粉粒体
の乾燥を行った。乾燥用サイロ型容器1は、内径300
mmの円筒形で、0.14m3 の粉粒体を高さ(図1で
Hとして示す)が2000mmまで収納しうるものであ
り、底部の定量排出機構3として、サークルフィーダー
CF−300〔ヨシカワ(株)製〕が使用されている。
加熱装置4で加熱された乾燥用ガスは、下端部に設けら
れた分散板5から噴出されると共に、図1には示されて
いないが、図2(a)に示した如くに、定量排出機構3
(サークルフィーダー)の軸部からも噴出されるように
なっている。粉粒体は、界面重縮合法で得られた、残溶
媒として塩化メチレンを平均860wt・ppm含有す
る平均分子量(Mv)21500のポリカーボネートか
らなる、平均粒径0.52mmで、図3に示す粒径分布
を有し、安息角38°の粉粒体である。
Example 1 Powder and granules were dried using the continuous powder and granule dryer shown in FIG. The drying silo-type container 1 has an inner diameter of 300
It has a cylindrical shape with a diameter of 0.1 mm and is capable of accommodating powder particles of 0.14 m 3 up to a height of 2000 mm (shown as H in FIG. 1). As a fixed quantity discharging mechanism 3 at the bottom, a circle feeder CF-300 [Yoshikawa Co., Ltd.] is used.
Although not shown in FIG. 1, the drying gas heated by the heating device 4 is ejected from the dispersion plate 5 provided at the lower end, but as shown in FIG. Mechanism 3
It is also designed to be ejected from the (circle feeder) shaft. The powder and granular material is composed of a polycarbonate having an average molecular weight (Mv) of 21,500 containing an average of 860 wt.ppm of methylene chloride as a residual solvent, which is obtained by the interfacial polycondensation method, and has an average particle diameter of 0.52 mm, and the particles shown in FIG. It is a granular material having a diameter distribution and an angle of repose of 38 °.

【0013】この粉粒体を、粉粒体供給設備11内に収
納し、加熱機構12で120℃に加熱したのち、乾燥サ
イロ型容器に供給した。供給量が0.14m3 に達した
後は、ロータリーバルブ13で平均0.012m3 /h
rの速度で連続的に供給した。乾燥用ガスとしては窒素
ガスを使用し、加熱装置4で120℃に加熱し、分散板
5及び定量排出機構3の軸部から、1.3m3 /hrの
速度で噴出させた。乾燥サイロ型容器1内の温度を12
0℃に保持しながら、乾燥サイロ型容器1内で流動する
粉粒体の粉面レベルが下部より2000mmに保たれる
ように、定量排出機構(サークルフィーダー)3の回転
速度を調整して乾燥粉粒体の排出量を調整した。平均滞
留時間は12時間である。十分に乾燥サイロ型容器内の
粉粒体が入れ替わったことが確認された、運転開始後2
0時間が経過した時点で、定量排出機構3から排出され
る粉粒体の残留塩化メチレン量の測定を開始し、以後2
0分毎に測定した。その結果は、第1表に記載した通り
であり、残留塩化メチレン量は安定して低く、十分に安
定した乾燥が行われたことが確認された。
The powder and granules were housed in a powder and granule supply facility 11, heated to 120 ° C. by a heating mechanism 12, and then supplied to a dry silo type container. After the supply amount reaches 0.14 m 3, the average 0.012 m 3 / h in the rotary valve 13
It was continuously fed at a rate of r. Nitrogen gas was used as a drying gas, heated to 120 ° C. by the heating device 4, and ejected from the shaft of the dispersion plate 5 and the fixed amount discharge mechanism 3 at a speed of 1.3 m 3 / hr. The temperature in the dry silo type container 1 is set to 12
While maintaining the temperature at 0 ° C., the rotation speed of the constant amount discharging mechanism (circle feeder) 3 is adjusted so that the powder surface level of the powder particles flowing in the drying silo type container 1 is maintained at 2000 mm from the lower part and dried. The discharge amount of the granular material was adjusted. The average residence time is 12 hours. It was confirmed that the powder and granules in the dry silo-type container had been replaced sufficiently. 2
When the time of 0 hours has elapsed, the measurement of the residual methylene chloride amount of the powder and granules discharged from the fixed amount discharge mechanism 3 is started, and thereafter 2
It was measured every 0 minutes. The results are as shown in Table 1, and it was confirmed that the residual amount of methylene chloride was stable and low, and that sufficiently stable drying was performed.

【0014】[0014]

【表1】 [Table 1]

【0015】実施例2 乾燥サイロ型容器に供給する粉粒体及び窒素ガスの温度
並びに乾燥サイロ型容器内の温度を、何れも100℃と
し、窒素ガスの供給量を2.0m3 /hrとした以外
は、実施例1と全く同様に実施した。その結果は、第2
表に記載した通りであり、実施例1と同様に、十分に安
定した乾燥が行われたことが確認された。
Example 2 The temperature of the powder and granules and nitrogen gas supplied to the dry silo type container and the temperature in the dry silo type container were both 100 ° C., and the supply amount of nitrogen gas was 2.0 m 3 / hr. Except for the above, the same procedure as in Example 1 was performed. The result is the second
As described in the table, it was confirmed that sufficiently stable drying was performed as in Example 1.

【0016】[0016]

【表2】 [Table 2]

【0017】実施例3 粉粒体を、n−ヘプタンを主成分とする残溶媒を平均1
500wt・ppm含有するポリプロピレンからなる、
平均粒径0.32mmで、安息角35°の粉粒体とし、
粉粒体の乾燥サイロ型容器への供給速度を平均0.02
4m3 /hrとし、乾燥サイロ型容器内の温度並びに乾
燥サイロ型容器に供給する粉粒体及び窒素ガスの温度
を、何れも105℃とし、窒素ガスの供給量を0.5m
3 /hrとし、運転開始後15時間経過時から残溶媒量
の測定を開始し、平均滞留時間を12時間に保持した以
外は、実施例1と全く同様に実施した。その結果は、第
3表に記載した通りであり、実施例1と同様に、十分に
安定した乾燥が行われたことが確認された。
Example 3 The average amount of the residual solvent containing n-heptane as the main component of the powder and granules was 1
Made of polypropylene containing 500 wt.ppm,
Powder particles with an average particle size of 0.32 mm and a repose angle of 35 °,
The average feed rate of powder and granules to the dry silo container is 0.02
4 m 3 / hr, the temperature inside the dry silo type container and the temperature of the powder and granules and nitrogen gas supplied to the dry silo type container were both 105 ° C., and the supply amount of nitrogen gas was 0.5 m.
It was set to 3 / hr, the measurement was carried out in exactly the same manner as in Example 1 except that the measurement of the residual solvent amount was started 15 hours after the start of operation and the average residence time was kept at 12 hours. The results are as shown in Table 3, and it was confirmed that sufficiently stable drying was performed as in Example 1.

【0018】[0018]

【表3】 [Table 3]

【0019】[0019]

【発明の効果】本発明によれば、特に、重合溶剤を含有
する重合体からなる粉粒体の如き、高付着性で低流動性
の粉粒体を、均一に、且つ効率良く乾燥することができ
る。
EFFECTS OF THE INVENTION According to the present invention, it is possible to uniformly and efficiently dry a granular material having a high adhesive property and a low fluidity, such as a granular material made of a polymer containing a polymerization solvent. You can

【図面の簡単な説明】[Brief description of drawings]

【図1】 実施例で用いた連続式粉粒体乾燥装置の概要
図である。
FIG. 1 is a schematic diagram of a continuous powder / particle drying apparatus used in Examples.

【図2】 乾燥用ガスの噴出方法の例を示す概要図であ
る。
FIG. 2 is a schematic diagram showing an example of a method for jetting a drying gas.

【図3】 実施例1の乾燥前の粉粒体の粒度分布を示す
グラフである。
FIG. 3 is a graph showing the particle size distribution of the powdery or granular material before drying in Example 1.

【符号の説明】[Explanation of symbols]

1 乾燥サイロ型容器 2 保温用ジャケット 3 定量排出機構 4 加熱装置 5 分散板 6 粉粒体 7 駆動装置 11 粉粒体供給設備 12 加熱機構 13 ロータリーバルブ H 粉面までの高さ 1 Dry silo type container 2 insulation jacket 3 Quantitative discharge mechanism 4 heating device 5 Dispersion plate 6 powder 7 Drive 11 Powder and granular material supply equipment 12 Heating mechanism 13 Rotary valve Height to H powder surface

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI テーマコート゛(参考) F26B 25/00 F26B 25/00 J ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 7 Identification code FI theme code (reference) F26B 25/00 F26B 25/00 J

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 粉粒体をサイロ型容器内で乾燥用ガスと
接触させて乾燥するに際し、底部に定量排出機構を有す
るサイロ型容器を用い、且つ乾燥用ガスを下端部より供
給することを特徴とする粉粒体の乾燥方法。
1. When a powdery or granular material is dried by contacting it with a drying gas in a silo type container, a silo type container having a fixed amount discharge mechanism at the bottom is used, and the drying gas is supplied from the lower end. A characteristic method for drying a granular material.
【請求項2】 定量排出機構が、水平方向に回転するテ
ーブルを用いて粉粒体を定量的に切出して排出する機構
である請求項1記載の粉粒体の乾燥方法。
2. The method for drying a granular material according to claim 1, wherein the quantitative discharging mechanism is a mechanism for quantitatively cutting and discharging the granular material using a table which rotates in a horizontal direction.
【請求項3】 粉粒体が、安息角35°以上の低流動性
の粉粒体である請求項1又は2記載の粉粒体の乾燥方
法。
3. The method for drying a powder or granular material according to claim 1, wherein the powder or granular material is a low-flowable powder or granular material having an angle of repose of 35 ° or more.
【請求項4】 粉粒体が、重合溶剤を含有する重合体か
らなる粉粒体である請求項1〜3の何れかに記載の粉粒
体の乾燥方法。
4. The method for drying a granular material according to claim 1, wherein the granular material is a granular material made of a polymer containing a polymerization solvent.
【請求項5】 粉粒体が、界面重縮合法で得られた塩化
メチレンを含有するポリカーボネートである請求項4記
載の粉粒体の乾燥方法。
5. The method for drying a granular material according to claim 4, wherein the granular material is a polycarbonate containing methylene chloride obtained by an interfacial polycondensation method.
JP2001395909A 2001-12-27 2001-12-27 Method for drying powder and grain Pending JP2003194465A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001395909A JP2003194465A (en) 2001-12-27 2001-12-27 Method for drying powder and grain

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001395909A JP2003194465A (en) 2001-12-27 2001-12-27 Method for drying powder and grain

Publications (1)

Publication Number Publication Date
JP2003194465A true JP2003194465A (en) 2003-07-09

Family

ID=27602166

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP2003194465A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008087449A (en) * 2006-10-02 2008-04-17 Fukuhara Co Ltd Method and device for supplying nitrogen gas in resin molding machine
WO2013183179A1 (en) * 2012-06-08 2013-12-12 株式会社ヨシカワ Gas feed device in powder/granular material feeder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008087449A (en) * 2006-10-02 2008-04-17 Fukuhara Co Ltd Method and device for supplying nitrogen gas in resin molding machine
WO2013183179A1 (en) * 2012-06-08 2013-12-12 株式会社ヨシカワ Gas feed device in powder/granular material feeder
AU2012382164B2 (en) * 2012-06-08 2015-11-19 Yoshikawa Corporation Gas feeding apparatus for powder and granular material feeder
US9441882B2 (en) 2012-06-08 2016-09-13 Yoshikawa Corporation Gas feeding apparatus for powder and granular material feeder

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