JPH1073375A - Dryer - Google Patents
DryerInfo
- Publication number
- JPH1073375A JPH1073375A JP24716396A JP24716396A JPH1073375A JP H1073375 A JPH1073375 A JP H1073375A JP 24716396 A JP24716396 A JP 24716396A JP 24716396 A JP24716396 A JP 24716396A JP H1073375 A JPH1073375 A JP H1073375A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- dryer
- end plate
- gap
- stirring shaft
- 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
Landscapes
- Drying Of Solid Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は円筒横型撹拌乾燥機
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical horizontal stirring dryer.
【０００２】[0002]
【従来の技術】有機溶剤、水を含む樹脂等を乾燥させる
場合種々の乾燥機が用いられるが、なかでも円筒横型撹
拌乾燥機は内部の撹拌羽根によりブロック化したものも
破壊させて粉体あるいは粒体の製品とすることができ、
また完全密閉式であるので、有機溶剤の回収、危険な薬
剤の飛散防止が容易である。かかる乾燥機は図１及び図
３に示すように本体胴８の内側に撹拌羽根９を有し、撹
拌羽根９を回転させることにより、内部の粉体１３が乾
燥機内を回転流動すると共に、不活性ガスを５よりネッ
クブッシュ１２と撹拌軸１との間に粉体１３が入り込ま
ないように導入し、スチームによりジャケット１１、撹
拌軸１、撹拌羽根９を加熱して乾燥機の内温を上昇させ
て、粉体を乾燥させるものである。粉体は供給部６より
供給され、排出部７から取り出される。2. Description of the Related Art Various types of dryers are used to dry resins containing organic solvents and water. Among them, a cylindrical horizontal agitator / dryer breaks down a powder which has been blocked by an internal agitating blade to produce powder or powder. Granular product can be
In addition, since it is a completely sealed type, it is easy to collect an organic solvent and prevent dangerous chemicals from scattering. As shown in FIGS. 1 and 3, such a dryer has a stirring blade 9 inside the main body 8, and by rotating the stirring blade 9, the powder 13 inside rotates and flows inside the dryer, and The active gas is introduced from 5 so that the powder 13 does not enter between the neck bush 12 and the stirring shaft 1, and the jacket 11, the stirring shaft 1, and the stirring blade 9 are heated by steam to raise the internal temperature of the dryer. Then, the powder is dried. The powder is supplied from the supply unit 6 and taken out from the discharge unit 7.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、かかる
円筒横型撹拌乾燥機では、図３に示す如く撹拌軸１と鏡
板２との間隙部３に粉体が入り込み、該粉体がひも状の
異物１０となって、粉体中に混入し、製品価値、品質や
生産性を著しく下げることがあった。However, in such a cylindrical horizontal stirring dryer, powder enters the gap 3 between the stirring shaft 1 and the end plate 2 as shown in FIG. As a result, it may be mixed into the powder, resulting in a significant decrease in product value, quality and productivity.
【０００４】[0004]
【課題を解決するための手段】そこで本発明者等は上記
の問題を解決するため鋭意研究を重ねた結果、図６に示
す如く円筒横型撹拌乾燥機の撹拌軸１と鏡板２との間隙
部３が乾燥機内側に行くに従い漸次広がっていく部分を
有すると、粉体の乾燥工程において、該粉体がひも状の
異物１０となって、粉体中に混在する現象が全く見られ
ないことを見出し本発明を完成するに至った。The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, as shown in FIG. 6, the gap between the stirring shaft 1 and the end plate 2 of the cylindrical horizontal stirring and drying machine. When 3 has a portion that gradually spreads toward the inside of the dryer, the powder becomes a string-like foreign material 10 in the powder drying process, and no phenomenon of mixing in the powder is observed. And completed the present invention.
【０００５】[0005]
【発明の実施の形態】以下に本発明を詳細に説明する。
本発明の円筒横型撹拌乾燥機としては、常圧方式あるい
は真空方式いずれでも良く、また回分式、連続式いずれ
でもよいが、通常、常圧連続式で採用され、乾燥機の寸
法としては、胴直径１０００〜２５００ｍｍ、長さ５０
００〜１００００ｍｍ、容積４〜５０ｍ3のものが用い
られ、伝熱面積５０〜１５０ｍ2、好ましくは９０〜１
１０ｍ2のものが用いられる。撹拌馬力としては５〜７
５ｋＷ、好ましくは１０〜４５ｋＷである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
The cylindrical horizontal stirring and drying machine of the present invention may be any of a normal pressure type or a vacuum type, and may be a batch type or a continuous type. Usually, the normal pressure continuous type is adopted. Diameter 1000-2500mm, length 50
One having a heat transfer area of 50 to 150 m 2 , preferably 90 to 1 m 2 , and having a heat transfer area of 50 to 150 m 3 is used.
10 m 2 is used. 5-7 as a stirring horsepower
5 kW, preferably 10-45 kW.
【０００６】仕込み粉体速度は２００〜４０００ｋｇ／
ｈｒ（樹脂分）、仕込み時の粉体の温度は３０〜８０℃
である。The charged powder speed is 200 to 4000 kg /
hr (resin content), the temperature of the powder at the time of preparation is 30 to 80 ° C.
It is.
【０００７】本発明では上記の設備において、撹拌軸１
と鏡板２との間隙部３が、乾燥機内側に行くに従い漸次
広げられていることが最大の特徴であり、その詳細につ
いて以下に述べる。[0007] In the present invention, in the above equipment, the stirring shaft 1
The most characteristic feature is that the gap 3 between the end plate 2 and the end plate 2 is gradually widened toward the inside of the dryer, and the details thereof will be described below.
【０００８】撹拌軸１と鏡板２との間隙部３の幅Ｓは通
常３〜１０ｍｍであり、好ましくは４〜５ｍｍである。
鏡板の厚みＴは２０〜５０ｍｍである。撹拌軸１と鏡板
２との間隙部３は乾燥機内側に行くに従い漸次広がって
いる部分が設けられていればどのような割合で広げられ
てもよく、例えば直線的に撹拌軸１と鏡板２との間隙部
３の幅Ｓを増加させたり、曲線的に増加させても、漸次
広がっている部分が設けられていればよく、例えば図７
のようになる。また階段状に増加されるようにしても差
し支えない。The width S of the gap 3 between the stirring shaft 1 and the end plate 2 is usually 3 to 10 mm, preferably 4 to 5 mm.
The thickness T of the head plate is 20 to 50 mm. The gap 3 between the stirring shaft 1 and the end plate 2 may be widened at any ratio as long as a portion gradually expanding toward the inside of the dryer is provided. Even if the width S of the gap 3 is increased or increased in a curved line, it is sufficient that a gradually expanding portion is provided.
become that way. Also, it may be increased stepwise.
【０００９】更には撹拌軸の中心と、鏡板の中心部に空
けた撹拌軸と通す穴の中心とを図５に示す如く一致させ
ると粒径の小さい粉体でも、ねじれ状の異物が全く現れ
ず、本発明の効果が更に発揮される。Further, when the center of the stirring shaft and the center of the hole through which the stirring shaft is opened at the center of the end plate are made to coincide with each other as shown in FIG. Therefore, the effect of the present invention is further exhibited.
【００１０】また本発明では撹拌羽根の回転数として好
ましくは３〜８０ｒｐｍ、排出能力として好ましくは２
００〜４０００ｋｇ／ｈｒ等を適宜に選定することによ
って、乾燥と同時に粉体の送り出しを行うようにするの
が好ましい。In the present invention, the rotation speed of the stirring blade is preferably 3 to 80 rpm, and the discharge capacity is preferably 2 to 80 rpm.
It is preferable to feed the powder at the same time as the drying by appropriately selecting 00 to 4000 kg / hr or the like.
【００１１】本発明の乾燥に用いる粉体としては、工業
的に乾燥できる粉体であれば特に限定されず、例えばポ
リビニルアルコール、変性ポリビニルアルコール、デン
プン等の水溶性高分子、ポリプロピレン、ポリエチレン
等のポリオレフィン、ポリ塩化ビニル等が挙げられ、各
種の含水、含溶剤粉体を用いることができる。The powder used for drying in the present invention is not particularly limited as long as it can be industrially dried. For example, polyvinyl alcohol, modified polyvinyl alcohol, water-soluble polymers such as starch, polypropylene, polyethylene and the like can be used. Examples thereof include polyolefin and polyvinyl chloride, and various water-containing and solvent-containing powders can be used.
【００１２】上記で有機溶剤含有量、水分含有量を調節
した粉体１３を図６の如く撹拌軸１と鏡板２との間隙部
３が、乾燥機内側に行くに従い漸次広げられた部分を有
する本発明の乾燥機で乾燥させるわけであるが、本発明
では上記の粉体１３をまず供給部６より供給する。該粉
体１３の仕込み方法としては、通常連続仕込みが行われ
る。仕込み量としては２００〜４０００ｋｇ／ｍ3ｈｒ
で仕込まれる。As shown in FIG. 6, the powder 13 having the above-mentioned organic solvent content and water content adjusted has a gap portion 3 between the stirring shaft 1 and the end plate 2 which is gradually widened toward the inside of the dryer. In the present invention, the powder 13 is first supplied from the supply unit 6. As a method for charging the powder 13, continuous charging is usually performed. 200 to 4000 kg / m 3 hr
It is charged with.
【００１３】粉体がネックブッシュ１２と撹拌軸との間
に入り込まないようにさせるために不活性ガスが５から
供給され、該不活性ガスとしては窒素、炭酸ガス等の不
活性ガスが用いられる。In order to prevent powder from entering between the neck bush 12 and the stirring shaft, an inert gas is supplied from 5, and an inert gas such as nitrogen or carbon dioxide is used as the inert gas. .
【００１４】かかる不活性ガスには水分が含まれておら
ず、予熱するとさらに良い。不活性ガスの供給量として
は１〜７Ｎｍ3／ｈｒ、好ましくは２〜４Ｎｍ3／ｈｒで
ある。Such an inert gas contains no moisture, and it is better to preheat it. The supply amount of the inert gas is 1 to 7 Nm 3 / hr, preferably 2 to 4 Nm 3 / hr.
【００１５】乾燥機の内温は、ジャケット１に流される
蒸気の温度で調節され、その場合乾燥機内の温度は８０
〜１４０℃、好ましくは１００〜１２０℃である。The internal temperature of the dryer is controlled by the temperature of the steam flowing through the jacket 1, in which case the internal temperature of the dryer is 80%.
To 140 ° C, preferably 100 to 120 ° C.
【００１６】かくして得られた粉体は有機溶剤が粉体に
対して、２．０重量％以下、水分２．５重量％以下に除
去された高度乾燥品である上に、ねじれ異物が全くな
い。The powder thus obtained is a highly dried product in which the organic solvent has been removed to 2.0% by weight or less and water content of 2.5% by weight or less with respect to the powder, and has no twisted foreign matter at all. .
【００１７】[0017]
【実施例】以下、実施例を挙げて本発明を具体的に説明
する。尚、実施例中「％」とあるのは、特に断りのない
限り乾燥重量基準である。The present invention will be specifically described below with reference to examples. In the examples, “%” is based on dry weight unless otherwise specified.
【００１８】実施例１ 図４は本発明の円筒横型乾燥機の断面図である。更に図
５、６は、本発明の乾燥機の要部説明図である。図７は
撹拌軸１と鏡板２との間隙部３の拡大図である。撹拌軸
と鏡板との間隙部の幅Ｓは、乾燥機外側から１０ｍｍま
では一定とし、その後４０ｍｍまで直線的に増加されて
いる。円筒より乾燥機の寸法は本体胴の直径１．９ｍ、
幅５ｍ、容積１０ｍ3であり、撹拌軸の中心と、鏡板の
中心部に空けた撹拌軸を通す穴の中心に設置した。上記
の如き乾燥機を用いて、図４に示す供給部６より、有機
溶剤含有量７％（対ポリビニルアルコール乾燥重量）、
水分含有量７％（対ポリビニル乾燥重量）のポリビニル
アルコール（粒径１２００μｍ）粉末を１８７５ｋｇ／
ｈｒ（樹脂分）仕込み、乾燥機内温１２５℃（ジャケッ
ト温１３２℃）とし、撹拌軸の回転数は３８ｒｐｍとし
た。塔内での粉体の滞留時間は３０分間であった。排出
部７より取り出されたポリビニルアルコール粉末の有機
溶剤含有量は１．０％であり、平均粒径１０００μｍ
で、ブロック化せず、１８７０ｋｇ／ｈｒの白色の粉体
が得られた。異物の混入は全く認められなかった。Embodiment 1 FIG. 4 is a sectional view of a horizontal cylindrical dryer of the present invention. FIGS. 5 and 6 are explanatory views of a main part of the dryer of the present invention. FIG. 7 is an enlarged view of the gap 3 between the stirring shaft 1 and the end plate 2. The width S of the gap between the stirring shaft and the end plate is constant up to 10 mm from the outside of the dryer, and then linearly increases up to 40 mm. The size of the dryer is 1.9m in diameter from the cylinder,
It had a width of 5 m and a volume of 10 m 3 , and was installed at the center of the stirring shaft and the center of a hole through which the stirring shaft was opened in the center of the head plate. Using the dryer as described above, the organic solvent content 7% (based on the dry weight of polyvinyl alcohol) from the supply unit 6 shown in FIG.
1875 kg / powder of polyvinyl alcohol (particle diameter: 1200 μm) having a water content of 7% (vs.
hr (resin content), the internal temperature of the dryer was set to 125 ° C. (jacket temperature: 132 ° C.), and the rotation speed of the stirring shaft was set to 38 rpm. The residence time of the powder in the tower was 30 minutes. The organic solvent content of the polyvinyl alcohol powder taken out from the discharge part 7 was 1.0%, and the average particle size was 1000 μm.
As a result, 1870 kg / hr white powder was obtained without blocking. No contamination was found at all.
【００１９】実施例２ 実施例１で粒径９００μｍ（実施例１より小さい微粉の
もの）のポリビニルアルコールを用いて同様に乾燥を実
施した。図４に示す排出部７より取り出されたポリビニ
ルアルコール粉末の有機溶剤含有量は０．７％であり、
平均粒径６００μｍで、ブロック化せず、１８７０ｋｇ
／ｈｒの白色の粉体が得られた。異物の混入は全く認め
られなかった。Example 2 Drying was carried out in the same manner as in Example 1 except that polyvinyl alcohol having a particle size of 900 μm (fine powder smaller than that of Example 1) was used. The organic solvent content of the polyvinyl alcohol powder taken out from the discharge part 7 shown in FIG.
1870kg, average particle size 600μm, without blocking
/ Hr white powder was obtained. No contamination was found at all.
【００２０】比較例１ 図３に示す如く、撹拌軸１と鏡板２との幅Ｓを４ｍｍで
一定にして実施例１と同様に実施した。図１の排出部７
より取り出されたＰＶＡ粉末の有機溶剤含有量は１．０
％であり、粒径１０００μｍで、ブロック化せず、１８
７０ｋｇ／ｈｒの白色の粉体が得られたが、ねじれ状の
異物が１．８７ｋｇ／ｈｒで（０．１％対ポリビニル乾
燥重量）混在した。Comparative Example 1 As shown in FIG. 3, the operation was carried out in the same manner as in Example 1 except that the width S between the stirring shaft 1 and the end plate 2 was fixed at 4 mm. Discharge unit 7 of FIG.
The organic solvent content of the PVA powder taken out is 1.0
%, The particle size is 1000 μm,
A white powder of 70 kg / hr was obtained, but twisted foreign matter was mixed at 1.87 kg / hr (0.1% relative to polyvinyl dry weight).
【００２１】[0021]
【発明の効果】本発明では、円筒横型撹拌乾燥機の撹拌
軸と鏡板との間隙部における撹拌軸と鏡板の間隔を乾燥
機内側に行くに従い漸次広げられた部分を有するので、
ねじれ状の異物が全く混入しない。According to the present invention, the gap between the stirring shaft and the end plate in the gap between the stirring shaft and the end plate of the cylindrical horizontal stir drier has a portion gradually widened toward the inside of the dryer.
No twisted foreign matter enters at all.
【図１】従来の円筒乾燥機の断面図。FIG. 1 is a sectional view of a conventional cylindrical dryer.
【図２】円筒乾燥機の撹拌軸と鏡板の間隙部を示す説明
図。FIG. 2 is an explanatory view showing a gap between a stirring shaft of a cylindrical dryer and a head plate.
【図３】従来の円筒乾燥機の軸封部の断面図。FIG. 3 is a cross-sectional view of a shaft sealing portion of a conventional cylindrical dryer.
【図４】本発明の円筒乾燥機の断面図。FIG. 4 is a sectional view of the cylindrical dryer of the present invention.
【図５】本発明の円筒乾燥機の撹拌軸と鏡板の間隙部を
示す説明図。FIG. 5 is an explanatory view showing a gap between a stirring shaft and a head plate of the cylindrical dryer of the present invention.
【図６】本発明の円筒乾燥機の軸封部の断面図。FIG. 6 is a sectional view of a shaft sealing portion of the cylindrical dryer of the present invention.
【図７】本発明の円筒乾燥機の撹拌軸と鏡板の間隙部の
拡大図。FIG. 7 is an enlarged view of a gap between a stirring shaft and an end plate of the cylindrical dryer of the present invention.
１．撹拌軸 ２．鏡板 ３．間隙部 ４．軸封部 ５．不活性ガスの供給部 ６．粉体の供給部 ７．粉体の排出部 ８．本体胴 ９．撹拌羽根 １０．ねじれ異物 １１．ジャケット １２．ネックブッシュ １４．ランタンリング １５．グランドパッキン 1. Stirring shaft 2. End plate 3. Gap 4. Shaft seal 5. 5. Inert gas supply section 6. Powder supply section 7. Powder discharge section Main body 9. Stirring blade 10. Twisted foreign matter 11. Jacket 12. Neck bush 14. Lantern ring 15. Gland packing
Claims (2)
との間隙部３が、乾燥機内側に行くに従い漸次広げられ
た部分を有することを特徴とする乾燥機。1. A stirring shaft 1 and an end plate 2 of a cylindrical horizontal stirring dryer.
Wherein the gap 3 has a portion gradually widened toward the inside of the dryer.
撹拌軸を通す穴の中心とを一致させたことを特徴とする
請求項１記載の乾燥機。2. The dryer according to claim 1, wherein the center of the stirring shaft coincides with the center of a hole through which the stirring shaft is formed in the center of the head plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24716396A JPH1073375A (en) | 1996-08-28 | 1996-08-28 | Dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24716396A JPH1073375A (en) | 1996-08-28 | 1996-08-28 | Dryer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1073375A true JPH1073375A (en) | 1998-03-17 |
Family
ID=17159384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24716396A Pending JPH1073375A (en) | 1996-08-28 | 1996-08-28 | Dryer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1073375A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008524551A (en) * | 2004-12-22 | 2008-07-10 | ソルヴェイ（ソシエテ アノニム） | Method for drying wet polymer |
-
1996
- 1996-08-28 JP JP24716396A patent/JPH1073375A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008524551A (en) * | 2004-12-22 | 2008-07-10 | ソルヴェイ（ソシエテ アノニム） | Method for drying wet polymer |
| KR101233473B1 (en) * | 2004-12-22 | 2013-02-14 | 솔베이(소시에떼아노님) | Method for drying a wet polymer |
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