JP2723771B2 - Dryer with stirring blade - Google Patents
Dryer with stirring bladeInfo
- Publication number
- JP2723771B2 JP2723771B2 JP5001165A JP116593A JP2723771B2 JP 2723771 B2 JP2723771 B2 JP 2723771B2 JP 5001165 A JP5001165 A JP 5001165A JP 116593 A JP116593 A JP 116593A JP 2723771 B2 JP2723771 B2 JP 2723771B2
- Authority
- JP
- Japan
- Prior art keywords
- stirring blade
- protector
- blade
- stirring
- drying
- 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.)
- Expired - Lifetime
Links
Landscapes
- Drying Of Solid Materials (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は下水汚泥のような粘着性
のある湿潤物質を乾燥するために使用される攪拌翼付乾
燥機に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dryer with a stirring blade used for drying a sticky wet substance such as sewage sludge.
【０００２】[0002]
【従来の技術】ケーシングの内部に互いに逆方向に回転
する少なくとも２本の攪拌翼付乾燥軸を配置し、攪拌翼
付乾燥軸の内部に高圧蒸気等の熱媒体を供給することに
より、ケーシングの前端から供給された湿潤物質を攪拌
翼により攪拌しつつ乾燥し、ケーシングの後端から排出
する攪拌翼付乾燥機（パドルドライヤ）は、例えば特公
昭63-33072号公報や特開昭57-156913 号等により従来か
ら知られている。2. Description of the Related Art At least two drying shafts with stirring blades rotating in opposite directions to each other are disposed inside a casing, and a heating medium such as high-pressure steam is supplied to the inside of the drying shaft with stirring blades. Dryers with paddles (paddle dryers) for drying a wet substance supplied from the front end while stirring with a stirring blade and discharging the wet substance from the rear end of the casing are disclosed, for example, in JP-B-63-33072 and JP-A-57-156913. It has been known for some time.
【０００３】この攪拌翼は例えばSUS 304 等の耐熱金属
よりなる中空構造のものであるが、下水汚泥のような粘
着性のある湿潤物質と常時接触しつつ回転しているた
め、数年間にわたり運転すると攪拌翼の表面が徐々に摩
耗し、最悪の場合には攪拌翼の内部から高圧蒸気が噴出
するおそれがある。[0003] The stirring blade has a hollow structure made of a heat-resistant metal such as SUS 304. However, since the stirring blade constantly rotates while being in constant contact with a sticky wet substance such as sewage sludge, it has been operated for several years. Then, the surface of the stirring blade gradually wears, and in the worst case, there is a possibility that high-pressure steam is ejected from the inside of the stirring blade.
【０００４】そこで従来から図６に示すように、攪拌翼
31の外周部の先端に攪拌翼31の幅と等しいプロテクター
32を取り付け、摩耗の激しい攪拌翼31の外周面33を保護
する工夫がなされている。ところが本発明者の経験によ
れば、攪拌翼31は図７のように攪拌翼付乾燥軸34の軸線
に垂直面内で回転するため、プロテクター32による保護
範囲はプロテクター32の回転軌跡によりカバーされる範
囲、すなわち図７のハッチングを付した部分のみとな
り、攪拌翼31の外周面33のうちハッチングのない部分は
やはり摩耗することが分かった。また攪拌翼31のうち、
前面側の羽根面の前端部35と後端部36も比較的摩耗の激
しい部分であるが、図６に示すプロテクター32はこれら
の部分の保護には役立たないことが分かった。なお、攪
拌翼31の全体を十分に肉厚とすれば摩耗に耐えられるこ
とは自明であるが、この種の攪拌翼31は内部の高温高圧
の蒸気により湿潤物質を乾燥させるためのものであるた
め、その肉厚を大きくすることは熱伝導率の低下を招く
ために好ましくない。Therefore, conventionally, as shown in FIG.
A protector equal to the width of the stirring blade 31 at the tip of the outer periphery of 31
Attachment 32 is provided to protect the outer peripheral surface 33 of the agitating blade 31 which is severely worn. However, according to the inventor's experience, since the stirring blade 31 rotates in the plane perpendicular to the axis of the drying shaft 34 with the stirring blade as shown in FIG. 7 , the protection range of the protector 32 is covered by the rotation locus of the protector 32. 7 , that is, only the hatched portions in FIG. 7 , and it was found that the portions without hatching in the outer peripheral surface 33 of the stirring blade 31 were also worn. Also among the stirring blades 31,
The front end portion 35 and the rear end portion 36 of the blade surface on the front side are also relatively abraded portions, but it was found that the protector 32 shown in FIG. 6 was not useful for protecting these portions. It is obvious that if the entire stirring blade 31 is made sufficiently thick, it can withstand abrasion, but this type of stirring blade 31 is for drying a wet substance by high-temperature and high-pressure steam inside. Therefore, it is not preferable to increase the thickness because the thermal conductivity is reduced.
【０００５】[0005]
【発明が解決しようとする課題】本発明は上記した従来
の問題点を解決して、攪拌翼の熱伝導率の低下を招くこ
となくその摩耗を防止することができる攪拌翼付乾燥機
を提供するために完成されたものである。SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and provides a dryer with stirring blades which can prevent abrasion without lowering the thermal conductivity of the stirring blades. It was completed in order to
【０００６】[0006]
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明は、ケーシングの内部に互いに逆方
向に回転する少なくとも２本の攪拌翼付乾燥軸を配置し
た攪拌翼付乾燥機において、軸線に垂直な面に対して傾
斜させた各攪拌翼の外周部の先端部に、その取付け部に
連続する攪拌翼の外周部が通過する回転軌跡をカバーす
るプロテクターを、羽根面から突出させて取り付けたこ
とを特徴とするものである。 SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a dryer with stirring blades in which at least two drying shafts with stirring blades rotating in opposite directions to each other are arranged inside a casing. At an angle to the plane perpendicular to the axis
At the tip of the outer periphery of each inclined stirring blade, a protector that covers the rotation trajectory through which the outer periphery of the stirring blade continuous with the mounting portion passes was attached by protruding from the blade surface.
It is characterized by the following.
【０００７】[0007]
【作用】本発明によれば、軸線に垂直な面に対して傾斜
させた各攪拌翼の外周部の先端部に、羽根面から突出さ
せてプロテクターを取り付けたので、その取付け部に連
続する攪拌翼の外周部が通過する回転軌跡はプロテクタ
ーによりカバーされ、実施例に示すように攪拌翼の外周
面を保護することができる。 According to the present invention, an inclination with respect to a plane perpendicular to the axis is provided.
At the tip of the outer periphery of each agitated impeller,
The protector and attach it to the mounting part.
The rotation trajectory through which the outer periphery of the stirring blade passes follows the protector
And the outer circumference of the stirring blade as shown in the example.
Surface can be protected.
【０００８】[0008]
【実施例】以下に本発明を図示の実施例によって更に詳
細に説明する。図１〜図５は本発明の実施例を示すもの
で、１は横長のケーシング、２はその前端部上方に形成
された湿潤物質の供給口、３はケーシング１の後端部下
方に形成された排出口、４はケーシング１の外周壁部に
形成された加熱室であって高温高圧の水蒸気が供給され
ている。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the illustrated embodiments. 1 to 5 show an embodiment of the present invention , in which 1 is a horizontally long casing, 2 is a supply port for a wet substance formed above its front end, and 3 is formed below its rear end. The outlet 4 is a heating chamber formed on the outer peripheral wall of the casing 1 and is supplied with high-temperature and high-pressure steam.
【０００９】このケーシング１の内部には、互いに逆方
向に回転する２本の攪拌翼付乾燥軸５、６が配置されて
いる。各攪拌翼付乾燥軸５、６には一定ピッチで中空の
攪拌翼７が設けられており、軸端から供給された高温高
圧の水蒸気が攪拌翼付乾燥軸５、６及び中空の攪拌翼７
を内面から加熱し、湿潤物質を乾燥させる構造となって
いる。なお攪拌翼７は非連続羽根（単羽根）であり、湿
潤物質を排出口３に向かって送るために、攪拌翼付乾燥
軸５、６の軸線に垂直な面に対して例えば２〜３度程度
の角度で傾斜させてある。Inside the casing 1, two drying shafts 5 and 6 with stirring blades rotating in directions opposite to each other are arranged. Each of the drying shafts 5 and 6 with stirring blades is provided with a hollow stirring blade 7 at a constant pitch, and high-temperature and high-pressure steam supplied from the shaft end is supplied to the drying shafts 5 and 6 with stirring blades and the hollow stirring blades 7.
Is heated from the inner surface to dry the wet substance. The stirring blade 7 is a non-continuous blade (single blade). In order to send the wet substance toward the discharge port 3, the stirring blade 7 is, for example, 2 to 3 degrees with respect to a plane perpendicular to the axis of the drying shafts 5 and 6 with stirring blades. It is inclined at an angle.
【００１０】これらの攪拌翼７の外周部には、各攪拌翼
７の回転軌跡をカバーするプロテクター８が取り付けら
れている。図１〜図４の実施例ではプロテクター８は湿
潤物質の進行方向に向かって突出するように取り付けら
れているが、攪拌翼７の形状の異なる図５の実施例で
は、プロテクター８は湿潤物質の進行方向とは逆向きに
突出させて取り付けられている。しかしいずれもプロテ
クター８の回転軌跡が攪拌翼７の回転軌跡をカバーする
ようになっている。図１〜図４の実施例ではプロテクタ
ー８はSUS 304 製の10×10mmの断面の棒状体であり、最
大20mm程度羽根面９から突出させてある。攪拌翼７の大
きさによっては先端部に１個のプロテクター８を取付け
ればよいこともあるが、実施例では先端部と中央部に２
個のプロテクター８を取付けてある。これは図４に示す
ように、１個のプロテクター８が保護できるのは、プロ
テクター８の両端から攪拌翼付乾燥軸５、６の軸線に対
して垂直に引いた直線に挟まれた部分だけであり、先端
部に１個のプロテクター８を取付けただけでは攪拌翼７
の外周部の全体を保護できないためである。[0010] A protector 8 for covering the rotation locus of each stirring blade 7 is attached to the outer periphery of these stirring blades 7. In the embodiment shown in FIGS. 1 to 4, the protector 8 is mounted so as to protrude in the traveling direction of the wet substance. However, in the embodiment shown in FIG. It is mounted so as to project in the direction opposite to the traveling direction. However, in each case, the rotation path of the protector 8 covers the rotation path of the stirring blade 7. In the embodiment shown in FIGS. 1 to 4, the protector 8 is a rod-shaped body made of SUS304 and having a cross section of 10 × 10 mm, and protrudes from the blade surface 9 by a maximum of about 20 mm. Depending on the size of the stirring blade 7, one protector 8 may be attached to the tip, but in this embodiment, two protectors 8 are provided at the tip and the center.
The protectors 8 are attached. This means that, as shown in FIG. 4, one protector 8 can protect only a portion sandwiched between straight lines drawn perpendicularly to the axes of the drying shafts 5 and 6 with stirring blades from both ends of the protector 8. There is only one protector 8 attached to the tip,
This is because the entire outer peripheral portion cannot be protected.
【００１１】このように、本発明では湿潤物質と最も激
しく接触する部分にプロテクター８を取付けたので、攪
拌翼７の外周部はこのプロテクター８により保護され、
摩耗は大幅に軽減される。なおその分だけプロテクター
８は集中的に摩耗することとなるが、このプロテクター
８は中実体であって内部に蒸気が供給されている訳では
ないため、摩耗しても事故に繋がるおそれはない。また
このプロテクター８自体は定期点検の際などに容易に補
修することができ、摩耗してもメンテナンスが容易であ
る。As described above, in the present invention , since the protector 8 is attached to the portion which comes into the most intense contact with the wet substance, the outer peripheral portion of the stirring blade 7 is protected by the protector 8,
Wear is greatly reduced. The protector 8 wears intensively by that amount, but since the protector 8 is a solid body and the steam is not supplied to the inside, even if worn, there is no danger of causing an accident. Further, the protector 8 itself can be easily repaired at the time of a periodic inspection or the like, and even if worn, maintenance is easy.
【００１２】[0012]
【００１３】[0013]
【００１４】[0014]
【発明の効果】以上に説明したように、本発明によれば
軸線に垂直な面に対して傾斜させた各攪拌翼の外周部の
先端部に、その取付け部に連続する攪拌翼の外周部が通
過する回転軌跡をカバーするプロテクターを、羽根面か
ら突出させて取り付けたことにより、そのプロテクター
に連続する外周部の摩耗を防止することができる。よっ
て本発明は従来の問題点を解消した攪拌翼付乾燥機とし
て、業界に寄与するところは極めて大きいものである。As described above, according to the present invention ,
Of the outer circumference of each agitating blade inclined with respect to the plane perpendicular to the axis.
The tip portion, the protector covering the rotational locus of the outer peripheral portion of the stirring blade to be continuous to the mounting portion passes, or blade surface
By attaching the protector so as to protrude from the protector, it is possible to prevent wear of the outer peripheral portion continuous with the protector . Yo
Therefore, the present invention greatly contributes to the industry as a dryer with a stirring blade which has solved the conventional problems.
【図１】本発明の実施例を示す一部切欠正面図である。FIG. 1 is a partially cutaway front view showing an embodiment of the present invention .
【図２】図１のＡ−Ａ断面図である。FIG. 2 is a sectional view taken along line AA of FIG.
【図３】第１の発明の実施例の要部を示す斜視図であ
る。FIG. 3 is a perspective view showing a main part of the embodiment of the first invention.
【図４】プロテクターの保護範囲を説明する正面図であ
る。FIG. 4 is a front view illustrating a protection range of the protector.
【図５】本発明の他の実施例の要部を示す正面図であ
る。FIG. 5 is a front view showing a main part of another embodiment of the present invention .
【図６】従来例の要部を示す斜視図である。 FIG. 6 is a perspective view showing a main part of a conventional example.
【図７】従来のプロテクターの保護範囲を説明する正面
図である。 FIG. 7 is a front view illustrating a protection range of a conventional protector .
FIG.
１ ケーシング ５ 攪拌翼付乾燥軸 ６ 攪拌翼付乾燥軸 ７ 攪拌翼 ８ プロテクター DESCRIPTION OF SYMBOLS 1 Casing 5 Drying shaft with stirring blade 6 Drying shaft with stirring blade 7 Stirring blade 8 Protector
Claims (1)
る少なくとも２本の攪拌翼付乾燥軸を配置した攪拌翼付
乾燥機において、軸線に垂直な面に対して傾斜させた各
攪拌翼の外周部の先端部に、その取付け部に連続する攪
拌翼の外周部が通過する回転軌跡をカバーするプロテク
ターを、羽根面から突出させて取り付けたことを特徴と
する攪拌翼付乾燥機。1. A drying machine with a stirring blade having at least two drying shafts with stirring blades rotating in opposite directions inside a casing, wherein each of the drying shafts is inclined with respect to a plane perpendicular to the axis.
A dryer with a stirring blade, wherein a protector that covers a rotation locus through which the outer periphery of the stirring blade that is continuous with the mounting portion passes is attached to the tip of the outer periphery of the stirring blade so as to protrude from the blade surface. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5001165A JP2723771B2 (en) | 1993-01-07 | 1993-01-07 | Dryer with stirring blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5001165A JP2723771B2 (en) | 1993-01-07 | 1993-01-07 | Dryer with stirring blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06201263A JPH06201263A (en) | 1994-07-19 |
| JP2723771B2 true JP2723771B2 (en) | 1998-03-09 |
Family
ID=11493831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5001165A Expired - Lifetime JP2723771B2 (en) | 1993-01-07 | 1993-01-07 | Dryer with stirring blade |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2723771B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100880094B1 (en) * | 2007-04-11 | 2009-01-23 | 현대건설주식회사 | A Dry system transfer screw |
| JP5150660B2 (en) * | 2010-02-15 | 2013-02-20 | 信越化学工業株式会社 | Method for drying water-soluble cellulose ether |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54162227A (en) * | 1978-06-13 | 1979-12-22 | Shin Nippon Koki Co Ltd | Eccentric pipe and centrifugal casting apparatus |
| JPS6332653U (en) * | 1986-08-14 | 1988-03-02 | ||
| JPH0646137B2 (en) * | 1987-05-07 | 1994-06-15 | 株式会社栗本鐵工所 | Indirect heating type stirring dryer |
-
1993
- 1993-01-07 JP JP5001165A patent/JP2723771B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06201263A (en) | 1994-07-19 |
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