JP3709499B2 - Drying equipment - Google Patents

Drying equipment Download PDF

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JP3709499B2
JP3709499B2 JP2001047842A JP2001047842A JP3709499B2 JP 3709499 B2 JP3709499 B2 JP 3709499B2 JP 2001047842 A JP2001047842 A JP 2001047842A JP 2001047842 A JP2001047842 A JP 2001047842A JP 3709499 B2 JP3709499 B2 JP 3709499B2
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drum
stator
dried
drying apparatus
blade
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JP2002250588A (en
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沢 俊 雄 平
中 勉 田
浦 栄 一 三
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玉川マシナリー株式会社
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/12—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices
    • F26B11/14—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices the stirring device moving in a horizontal or slightly-inclined plane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/04—Agitating, stirring, or scraping devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/04—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over or surrounding the materials or objects to be dried

Description

【０００１】
【発明の属する技術分野】
この発明は、泥状、ペレット状、粉体等の高含水原料及び湿原料等の被乾燥物を乾燥し、低水分物とする横置筒型の乾燥装置に関する。
【０００２】
【従来の技術】
従来、この種の乾燥装置として、図９に示すものが知られている。この乾燥装置は、外周面にジャケット４が設けられた横置筒型のドラム１の軸心部に中空の回転軸２を回転自在に挿通し、この中空回転軸２に中空円盤状の撹拌羽根（以下、ディスク羽根と称する）３が多数連設され、ドラム１のジャケット４に供給された熱媒と中空回転軸２から各ディスク羽根３内に流通させた熱媒とにより加熱しつつディスク羽根３を回転させ被乾燥物を撹拌乾燥させるものである。この乾燥装置によればドラム１の一端側上部の投入口５から被乾燥物を投入すると、被乾燥物は間接加熱によって加熱されつつ撹拌されて乾燥され、ドラム１の他端側下部の排出口６から排出される。
【０００３】
この種の乾燥装置は、ドラム１のジャケット４ばかりでなくディスク羽根３内にも熱媒が供給されるため充分な伝熱面積を確保でき、乾燥効果が優れている反面、被乾燥物は、当初加熱により粘度が低下しディスク羽根３での撹拌状態も良いが、途中水分６０〜７０％ＷＢ程度に水分が減少した状態では、粘性の高い半固化状態となりディスク羽根３等の伝熱面部分に固化・付着する難点を有している。その水分領域をさらに低下させればサラサラの粉状になるが、上記半固化状態のままでは乾燥に長時間を要し、乾燥効率が低下する。そこで、従来、伝熱面部分への被乾燥物の固化・付着を防止する目的で、ディスク羽根３とディスク羽根３との間にステータ（邪魔板）７（図７参照）を設けた乾燥装置も提供されている。ステータ７を設けることでディスク羽根３、３間に残る被乾燥物が除去される。
【０００４】
図７は従来例の中央縦断面正面説明図、図８は従来例の横断面平面説明図である。同図に示すように、従来のディスク羽根３は、装置をコンパクトにし伝熱面積を多く得るために、ドラム１内において中空回転軸２に同一直径、同一ピッチに取付けられている。従って、ディスク羽根３とディスク羽根３の間に位置させるステータ７も、ディスク羽根３、３ピッチと略同じピッチで串歯状に短いピッチ間隔で並ぶ格好となる。
なお、中空回転軸２には図７に示すように中空回転軸２内からディスク羽根３内に連通する通路１０が設けられており、熱媒は中空回転軸２からこの通路１０を通ってディスク羽根３内に供給される。
【０００５】
【発明が解決しようとする課題】
しかしながら、ある種の汚泥等の被乾燥物では、被乾燥物の固化の程度が硬く、厚いため串歯状に並んだステータ７上に乗り上げ滞留し、被乾燥物の移動が阻害されたり、被乾燥物の新たな投入の障害となる課題がある。また、被乾燥物が串歯状に並んだステータ７上に乗り上げた状態では、伝熱が少なく撹拌もないため乾燥が進みにくく乾燥処理に長時間を要することとなるし、ディスク羽根３の回転の抵抗荷重として作用し動力の上昇を招くばかりでなく装置の停止の原因にもなる課題がある。
【０００６】
この発明は、このような課題を解決せんと提案されたものであり、その目的は被乾燥物が粘性の高い半固化状になってもステータ上への乗り上げがなく、ディスク羽根の回転によりディスク羽根間に引き込まれ撹拌、移動され、伝熱面が有効に利用でき、ドラム内周壁面及びディスク羽根への被乾燥物の固化・付着もなく、被乾燥物の共廻りも生ずることがなく、乾燥効率が高く、さらに動力の極端な上昇もない乾燥装置を提供することにある。
【０００７】
【課題を解決するための手段】
前記課題を解決するため、この発明の乾燥装置は、外周面にジャケットを備えた横置筒型のドラムの軸心部に、中空回転軸を回転自在に挿通し、この中空回転軸に中空円盤状の撹拌羽根が多数連設され、ドラムのジャケットに供給された熱媒及び中空回転軸を介して各撹拌羽根内に流通させた熱媒とにより加熱しつつ撹拌羽根を回転させて被乾燥物を撹拌乾燥させる乾燥装置において、
ドラムの上方内周壁面に固着して撹拌羽根と撹拌羽根との間にステータが垂下され、このステータの前方における撹拌羽根の外径より外側位置に、ドラムの長手方向に沿ってスクリューコンベアを設けたことを特徴とする。
【０００８】
また、この発明の乾燥装置は、前記スクリューコンベアのスクリュー羽根が、ドラムの略全長にわたって又は間欠的に又は一部分に設けられていることを特徴とする。
【０００９】
また、この発明の乾燥装置は、前記ステータが、ドラム長手方向に平面視千鳥状に、又は位相をもたせ配設されていることを特徴とし、
さらに、この発明の乾燥装置は、前記ステータの一端側縁部を刃状又はシャープエッジとしたことを特徴とする。
【００１０】
【発明の実施の形態】
以下、この発明の実施の形態について図面と共に詳細に説明する。図１は、この発明の実施の形態を示す縦断面側面説明図、図２は、図１Ａ−Ａ線断面説明図であり、前記従来例と同一構成要素には同一符号を付して説明する。
【００１１】
この発明に係る乾燥装置は、外周面にジャケット４を備えた横置筒型のドラム１と、該ドラム１の軸心部に回転自在に挿通された中空回転軸２と、該中空回転軸２に多数連設した中空円盤状の撹拌羽根（ディスク羽根と称す）３とより構成され、ドラム１内に投入された被乾燥物は、ドラム１の外周面に設けられたジャケット４に供給された熱媒によりドラム１を介し加熱され、また中空回転軸２から各ディスク羽根３内に流通された熱媒によりディスク羽根３を介し加熱されると共に、ディスク羽根３の回転により撹拌されるもので、これによりドラム１内に投入された被乾燥物は加熱されつつ撹拌され乾燥処理されるものである。中空回転軸２には、図７と同様に中空回転軸２内からディスク羽根３内に連通する通路１０が設けられており、熱媒は中空回転軸２内からこの通路１０を通ってディスク羽根３内に供給される。
【００１２】
ドラム１は、本例においては断面円筒型であり、上部にフード９が一体に設けられている。このフード９部分は、乾燥処理時に発生する廃ガスの通路として設けられたものであり、廃ガスはこのフード９部分を通って排出される。ドラム１のフード９部分の適所には、図示は省略したがガス排出用の排出口が設けられており、廃ガスはフード９を通って排出口から排出される。廃ガスを大気に直接排出すると大気汚染等の公害の発生するおそれがある場合には、廃ガスを一旦浄化装置に案内し、浄化してから大気に排出するようにする。
【００１３】
中空回転軸２に多数連設されたディスク羽根３は、同一直径の等ピッチ間隔で列設されており、これにより装置がコンパクトで伝熱面積を多く得ることができる。
【００１４】
このディスク羽根３とディスク羽根３との間には、ドラム１の上方内周壁面に固着したステータ７が垂下されている。このステータ７は、ディスク羽根３の伝熱面部分への被乾燥物（スケール）の固化・付着を防止したり、被乾燥物のディスク羽根３、３間での共廻りを防止するもので、本例においては、フード９部分の一方の側壁内面に取付板８により固設されて垂直に垂下されている。
【００１５】
そして、ディスク羽根３の外径より外側に位置する前記ステータ７の前方に、ドラム１の長手方向に沿ってスクリューコンベア１１が回転自在に設けられる。
このスクリューコンベア１１は、スクリュー軸１２にスクリュー羽根１３が螺旋状に設けられて構成され、スクリュー軸１２には伝動機構を介して動力源が連結され回転され、スクリューコンベア１１が回転する。
【００１６】
このスクリューコンベア１１は、ステータ７に乗り上げた又は乗り上げようとする被乾燥物を、移動させ伝熱面を有効に利用したり、計画的移動で処理量に合せた乾燥処理を行うものである。例えば、乗り上げ量の一部或いは全部を、乗り上げの無いゾーンに移動させたり、乾燥処理の処理量に合わせスクリューコンベア１１で計画的に移動させ乾燥処理の効率化を図ったりする。
【００１７】
従って、スクリューコンベア１１のスクリュー羽根１３は、ドラム１の全長にわたって設けてもよいし、部分的に設けてもよいし、間欠的（断続的）に設けてもよい。例えば、ドラム１の全長にわたって被乾燥物の移動が必要な場合には、スクリュー羽根１３はドラム１の全長にわたって設ける。この場合、スクリューコンベア１１の駆動速度が速かったり、常時駆動させていると、被乾燥物が未処理状態で排出されるおそれがあるので、駆動速度を調節したり、必要とする時だけ駆動させたりする。
また、被乾燥物がステータ７に乗り上げる部分だけに設けて、被乾燥物のステータ７への乗り上げを防止したり、この乗り上げた被乾燥物を移動させたい場合は、この部分だけに設ければよい。
さらに、ステータ７への被乾燥物の乗り上げがある部分から無いゾーンに移動させたり、処理量及び乾燥状態に応じドラム１内で位置を順次変えたい場合等は、間欠的に設ければよい。
【００１８】
また、スクリュー羽根１３を伝熱面としたい場合には、スクリュー羽根１３を中空とし、スクリュー軸１２も中空とし、このスクリュー軸１２からスクリュー羽根１３内に熱媒を供給するようにしてもよい。このようにすれば伝熱面積が拡大し、乾燥効率がさらに向上する。
【００１９】
しかして、ドラム１内に投入された被乾燥物は、ドラム１のジャケット４に供給された熱媒によるドラム１の内周面及びディスク羽根３内に流通された熱媒によるディスク羽根３の外周面から伝熱されて加熱されるし、中空回転軸２の回転によるディスク羽根３の回転により回転撹拌される。従って、ドラム１内に投入された被乾燥物は、加熱されつつ撹拌、乾燥され、被乾燥物の投入口側からディスク羽根３の回転により順次送られて排出口側に移動し、最終的には排出口から排出される。
【００２０】
この時、ステータ７のために、ディスク羽根３の伝熱面部分への被乾燥物やスケールの固化・付着が防止されるし、被乾燥物の共廻りが防止される。
そして、ステータ７の前方におけるディスク羽根３の外径より外側位置には、ドラム１の長手方向に沿ってスクリューコンベア１１が回転自在に設けられているので、このスクリューコンベア１１を駆動させることによって、ステータ７に乗り上げた或いは乗り上げようとする被乾燥物を移動させ、滞留するのを防止することができ、伝熱面を有効に利用したり、処理量に合せた計画的移動で乾燥処理を行い、乾燥効率を向上させることができる。
【００２１】
従って、被乾燥物は、順調に撹拌、移動されるし、被乾燥物の新たな投入も順調に行うことができる。また、ディスク羽根３の不要な回転抵抗として作用することが減少し、動力の極端な上昇も防止されるし、さらに、順調に撹拌、移動が行われ、伝熱面部分への被乾燥物の固化・付着もないため伝熱効果もよく、乾燥効率が向上し、短時間での乾燥処理が可能となる。
【００２２】
図３は、この発明の他の実施の形態を示す縦断面側面説明図、図４は、図３Ｂ−Ｂ線断面説明図、図５は、この発明の他の実施の形態を示す横断面平面説明図である。
この実施の形態は、ステータ７を、同図に示すようにドラム１の上方の対向する内周壁面に、左右に交互（図５のように平面視では千鳥状）に配設したもの、即ち、ドラム１の一方の側壁内面では、図４に示すようにディスク羽根３とディスク羽根３との間に１個おきに設けられてなり、左右合せて各ディスク羽根３、３間にステータ７が設けられるものであり、他は前記実施の形態と同様であるので同一構成要素には同一符号を付して詳細な説明は省略する。このステータ７の配設によれば、ドラム１の左側の側壁内面に設けたステータ７と、右側の側壁内面に設けたステータ７との間の間隔が広く、また、一方の側壁内面にドラム１の長手方向に並列するステータ７、７間も間隔が広くなるので、全体にステータ７、７間が粗となるものである。
【００２３】
本例によれば、ステータ７、７間の間隔が広く全体に粗となっているから、被乾燥物が乾燥途中で半固化状になってもステータ７上に乗り上げ滞留することが減少するので、前記スクリューコンベア１１との相乗効果を期待できる。
【００２４】
また、図６は、この発明の更に他の実施の形態を示す縦断面側面説明図である。この実施の形態は、ドラム１が断面Ｕ字状の筒型であり、ステータ７は、ドラム１の左右の上方内周壁面に固着されて中空回転軸２に向かって垂下されたものであり、他は前記実施の形態と同様であるので同一構成要素には同一符号を付して詳細な説明は省略する。本例はステータ７が中空回転軸２の軸心に向けて設けられているので傾斜している。
【００２５】
なお、この発明は、前記実施の形態に限定されるものではなく、この発明の要旨を逸脱しない範囲で種々の変更が可能である。例えば、ステータ７の一端側縁部は、刃状又はシャープエッジとし、被乾燥物を切断できる格好とし、被乾燥物が半固化状になっても刃状又はシャープエッジで食い込み分割できるようにしてもよい。
【００２６】
【発明の効果】
以上詳細に説明した通り、この発明の乾燥装置によれば、次のような効果を奏する。
（１）ステータの前方における撹拌羽根の外径より外側位置には、ドラムの長手方向に沿ってスクリューコンベアが回転自在に設けられているので、乾燥処理中においてステータに乗り上げた或いは乗り上げようとする半固化状の被乾燥物は、スクリューコンベアで移動させ、滞留するのを防止することができ、伝熱面を有効に利用したり、処理量に合せた計画的移動で乾燥処理を行い、乾燥効率を向上させることができる。
【００２７】
（２）被乾燥物がステータ上に乗り上げ滞留することなく回転する撹拌羽根間に引き込まれ、順調に撹拌、移動されるので、伝熱面が有効に利用でき、しかもステータにより伝熱面部分への被乾燥物の固化・付着もなく、被乾燥物の共廻りもないので、伝熱効果が良く撹拌も良好となり乾燥効率が向上し、従来より短時間での乾燥処理が可能となる。
【００２８】
（３）ステータの間隔が広く粗となっていると、被乾燥物が乾燥処理途中で粘性の高い半固化状になってもステータに乗り上げ滞留することも少なくなるので、スクリューコンベアとの相乗効果を期待できる。
【００２９】
（４）被乾燥物が順調に撹拌、移動されるので撹拌羽根の不要な回転抵抗としての加重がなくなり、動力の極端な上昇もない。
【００３０】
（５）被乾燥物が順調に撹拌、移動されるので被乾燥物の新たな投入も順次行うことができ、しかもスクリューコンベアのため計画的投入が可能となる。
【図面の簡単な説明】
【図１】この発明の実施の形態を示す縦断面側面説明図である。
【図２】図１Ａ−Ａ線断面説明図である。
【図３】この発明の他の実施の形態を示す縦断面側面説明図である。
【図４】図３Ｂ−Ｂ線断面説明図である。
【図５】この発明の他の実施の形態を示す横断面平面説明図である。
【図６】この発明の更に他の実施の形態を示す縦断面側面説明図である。
【図７】従来例を示す中央縦断面正面説明図である。
【図８】従来例を示す横断面平面説明図である。
【図９】従来例を示す一部破断正面図である。
【符号の説明】
１ ドラム
２ 中空回転軸
３ 撹拌羽根（ディスク羽根）
４ ジャケット
７ ステータ
８ 取付板
９ フード
１０ 通路
１１ スクリューコンベア
１２ スクリュー軸
１３ スクリュー羽根[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a horizontally-cylinder drying apparatus that dries a dry matter such as a highly water-containing raw material such as mud, pellets, and powder and a wet raw material to obtain a low moisture content.
[0002]
[Prior art]
Conventionally, what is shown in FIG. 9 is known as this kind of drying apparatus. In this drying apparatus, a hollow rotary shaft 2 is rotatably inserted into an axial center portion of a horizontal cylindrical drum 1 having a jacket 4 provided on an outer peripheral surface, and a hollow disk-shaped stirring blade is inserted into the hollow rotary shaft 2. (Hereinafter referred to as disk blades) 3 are arranged in series, and the disk blades are heated while being heated by the heat medium supplied to the jacket 4 of the drum 1 and the heat medium circulated from the hollow rotary shaft 2 into each disk blade 3. 3 is rotated and the material to be dried is stirred and dried. According to this drying apparatus, when an object to be dried is introduced from the inlet 5 at the upper end of the drum 1, the object to be dried is stirred and dried while being heated by indirect heating, and an outlet at the lower end of the other end of the drum 1. 6 is discharged.
[0003]
This type of drying apparatus can ensure a sufficient heat transfer area because the heat medium is supplied not only to the jacket 4 of the drum 1 but also to the disk blades 3 and has a good drying effect. Although the viscosity is lowered by the initial heating and the stirring state at the disk blade 3 is good, when the water content is reduced to about 60 to 70% WB on the way, the viscosity becomes a semi-solidified state and the heat transfer surface portion of the disk blade 3 and the like. It has the difficulty of solidifying and adhering. If the moisture region is further reduced, it becomes a smooth powdery state, but in the semi-solidified state, it takes a long time to dry and the drying efficiency is lowered. Therefore, conventionally, a drying apparatus in which a stator (baffle plate) 7 (see FIG. 7) is provided between the disk blade 3 and the disk blade 3 for the purpose of preventing the object to be dried from solidifying and adhering to the heat transfer surface portion. Is also provided. By providing the stator 7, the object to be dried remaining between the disk blades 3 and 3 is removed.
[0004]
FIG. 7 is an explanatory front view of a central longitudinal section of a conventional example, and FIG. 8 is an explanatory plan view of a transverse section of a conventional example. As shown in the figure, the conventional disk blade 3 is attached to the hollow rotary shaft 2 with the same diameter and the same pitch in the drum 1 in order to make the device compact and obtain a large heat transfer area. Therefore, the stator 7 positioned between the disk blades 3 and 3 is also arranged in a skewer-like manner with a pitch substantially the same as the disk blades 3 and 3 pitches.
As shown in FIG. 7, the hollow rotary shaft 2 is provided with a passage 10 communicating from the hollow rotary shaft 2 into the disk blade 3, and the heat medium passes through the passage 10 from the hollow rotary shaft 2 to the disk. It is supplied into the blade 3.
[0005]
[Problems to be solved by the invention]
However, in some types of materials to be dried, such as sludge, the degree of solidification of the materials to be dried is hard and thick, so that the material gets on and stays on the stator 7 arranged in a skewer shape, and the movement of the materials to be dried is hindered. There is a problem that hinders the new input of dry matter. In addition, when the object to be dried rides on the stator 7 arranged in a skewer shape, the heat transfer is small and there is no agitation, so that the drying is difficult to proceed and the drying process takes a long time, and the disk blade 3 rotates. There is a problem that not only causes an increase in power and acts as a resistance load, but also causes the apparatus to stop.
[0006]
The present invention has been proposed to solve such a problem. The object of the present invention is that the object to be dried does not run on the stator even when the object to be dried is in a semi-solid state with high viscosity, and the disk blades rotate by rotating the disk blades. It is drawn between the blades, stirred, moved, and the heat transfer surface can be used effectively. There is no solidification or adhesion of the material to be dried to the inner wall surface of the drum and the disk blade, and there is no co-rotation of the material to be dried. An object of the present invention is to provide a drying apparatus that has high drying efficiency and does not have an excessive increase in power.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a drying apparatus according to the present invention includes a hollow rotating shaft that is rotatably inserted into an axial center portion of a horizontal cylindrical drum having a jacket on an outer peripheral surface, and a hollow disk is inserted into the hollow rotating shaft. The agitated blades are rotated while heating with a heating medium supplied to the jacket of the drum and a heating medium circulated in each agitating blade via a hollow rotating shaft. In a drying apparatus for stirring and drying
The stator is suspended between the stirring blades and fixed to the upper inner wall surface of the drum, and a screw conveyor is provided along the longitudinal direction of the drum at a position outside the outer diameter of the stirring blades in front of the stator. It is characterized by that.
[0008]
The drying device of the present invention is characterized in that the screw blades of the screw conveyor are provided over substantially the entire length of the drum or intermittently or partially.
[0009]
Further, the drying device of the present invention is characterized in that the stator is arranged in a zigzag shape in plan view in the drum longitudinal direction or with a phase,
Furthermore, the drying apparatus of the present invention is characterized in that the one end side edge portion of the stator has a blade shape or a sharp edge.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional side view showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line AA in FIG. 1. .
[0011]
A drying apparatus according to the present invention includes a horizontal cylindrical drum 1 having a jacket 4 on an outer peripheral surface, a hollow rotary shaft 2 rotatably inserted in an axial center portion of the drum 1, and the hollow rotary shaft 2 The material to be dried put into the drum 1 is supplied to a jacket 4 provided on the outer peripheral surface of the drum 1. It is heated through the drum 1 by the heat medium, heated through the disk blade 3 by the heat medium circulated from the hollow rotary shaft 2 into each disk blade 3, and stirred by the rotation of the disk blade 3. Thus, the material to be dried put into the drum 1 is stirred and dried while being heated. Similarly to FIG. 7, the hollow rotary shaft 2 is provided with a passage 10 communicating from the hollow rotary shaft 2 into the disk blade 3, and the heat medium passes from the hollow rotary shaft 2 through the passage 10 to the disk blade. 3 is supplied.
[0012]
In this example, the drum 1 has a cylindrical shape in cross section, and a hood 9 is integrally provided on the top. The hood 9 portion is provided as a passage for waste gas generated during the drying process, and the waste gas is discharged through the hood 9 portion. Although not shown in the figure, a discharge port for gas discharge is provided at an appropriate position of the hood 9 portion of the drum 1, and waste gas is discharged from the discharge port through the hood 9. If there is a possibility that pollution such as air pollution may occur if the waste gas is discharged directly to the atmosphere, the waste gas is once guided to the purification device and purified before being discharged to the atmosphere.
[0013]
A large number of disk blades 3 connected to the hollow rotary shaft 2 are arranged at equal pitch intervals of the same diameter, so that the apparatus is compact and a large heat transfer area can be obtained.
[0014]
A stator 7 fixed to the upper inner peripheral wall surface of the drum 1 is suspended between the disk blade 3 and the disk blade 3. The stator 7 prevents solidification / adhesion of the material to be dried (scale) on the heat transfer surface portion of the disk blade 3 or prevents the material to be dried from rotating between the disk blades 3 and 3. In this example, it is fixed to the inner surface of one side wall of the hood 9 portion by a mounting plate 8 and is vertically suspended.
[0015]
A screw conveyor 11 is rotatably provided along the longitudinal direction of the drum 1 in front of the stator 7 located outside the outer diameter of the disk blade 3.
The screw conveyor 11 is configured by a screw shaft 13 spirally provided on a screw shaft 12, and a power source is connected to the screw shaft 12 through a transmission mechanism to be rotated, whereby the screw conveyor 11 rotates.
[0016]
The screw conveyor 11 moves a drying object that has been or is about to ride on the stator 7 to effectively use the heat transfer surface, or performs a drying process according to a processing amount by a planned movement. For example, part or all of the boarding amount is moved to a zone where no boarding is performed, or the screw conveyor 11 is systematically moved according to the processing amount of the drying process to improve the efficiency of the drying process.
[0017]
Therefore, the screw blades 13 of the screw conveyor 11 may be provided over the entire length of the drum 1, may be provided partially, or may be provided intermittently (intermittently). For example, when it is necessary to move the material to be dried over the entire length of the drum 1, the screw blades 13 are provided over the entire length of the drum 1. In this case, if the drive speed of the screw conveyor 11 is fast or is always driven, the material to be dried may be discharged in an unprocessed state. Therefore, the drive speed is adjusted or driven only when necessary. Or
In addition, when the object to be dried is provided only on the part that rides on the stator 7 to prevent the object to be dried from climbing on the stator 7 or when the object to be dried is moved, it is provided only on this part. Good.
Further, when the object to be dried on the stator 7 is moved from a portion where there is an object to be dried to a zone where it is desired to change the position in the drum 1 in accordance with the processing amount and the drying state, it may be provided intermittently.
[0018]
When it is desired to use the screw blade 13 as a heat transfer surface, the screw blade 13 may be hollow, the screw shaft 12 may be hollow, and a heat medium may be supplied from the screw shaft 12 into the screw blade 13. This increases the heat transfer area and further improves the drying efficiency.
[0019]
Thus, the material to be dried put into the drum 1 is the inner peripheral surface of the drum 1 by the heat medium supplied to the jacket 4 of the drum 1 and the outer periphery of the disk blade 3 by the heat medium circulated in the disk blade 3. Heat is transferred from the surface and heated, and is agitated by the rotation of the disk blade 3 by the rotation of the hollow rotary shaft 2. Therefore, the material to be dried put into the drum 1 is stirred and dried while being heated, and is sequentially sent from the material inlet side by the rotation of the disk blade 3 to move to the outlet side, and finally. Is discharged from the outlet.
[0020]
At this time, because of the stator 7, it is possible to prevent the object to be dried and the scale from solidifying and adhering to the heat transfer surface portion of the disk blade 3, and to prevent the object to be dried from co-rotating.
And since the screw conveyor 11 is rotatably provided along the longitudinal direction of the drum 1 at a position outside the outer diameter of the disk blade 3 in front of the stator 7, by driving the screw conveyor 11, It is possible to prevent the object to be dried that has been or is about to ride on the stator 7 from moving and staying, and to effectively use the heat transfer surface, or to perform a drying process with a planned movement according to the processing amount. , Drying efficiency can be improved.
[0021]
Accordingly, the object to be dried is smoothly stirred and moved, and new input of the object to be dried can be performed smoothly. In addition, it acts as an unnecessary rotational resistance of the disk blades 3 to prevent an excessive increase in power, and further, stirring and moving are performed smoothly, and the material to be dried on the heat transfer surface portion Since there is no solidification and adhesion, the heat transfer effect is good, the drying efficiency is improved, and the drying process can be performed in a short time.
[0022]
FIG. 3 is a longitudinal sectional side view showing another embodiment of the present invention, FIG. 4 is a sectional view taken along the line B-B in FIG. 3, and FIG. It is explanatory drawing.
In this embodiment, the stators 7 are alternately arranged on the opposite inner peripheral wall surfaces above the drum 1 as shown in the same figure on the left and right sides (in a staggered manner in a plan view as shown in FIG. 5). On the inner surface of one side wall of the drum 1, as shown in FIG. 4, every other one is provided between the disk blade 3 and the disk blade 3, and a stator 7 is interposed between the disk blades 3, 3 in the left and right direction. Since the other components are the same as those of the above-described embodiment, the same components are denoted by the same reference numerals, and detailed description thereof is omitted. According to the arrangement of the stator 7, the space between the stator 7 provided on the left side wall inner surface of the drum 1 and the stator 7 provided on the right side wall inner surface is wide, and the drum 1 is provided on one side wall inner surface. Since the interval between the stators 7 and 7 arranged in parallel in the longitudinal direction is wide, the space between the stators 7 and 7 becomes rough as a whole.
[0023]
According to this example, since the interval between the stators 7 and 7 is wide and rough as a whole, even if the material to be dried becomes semi-solidified during drying, it is less likely that the material gets on and stays on the stator 7. A synergistic effect with the screw conveyor 11 can be expected.
[0024]
FIG. 6 is a longitudinal sectional side view showing still another embodiment of the present invention. In this embodiment, the drum 1 has a U-shaped cylindrical shape, and the stator 7 is fixed to the left and right upper inner peripheral wall surfaces of the drum 1 and is suspended toward the hollow rotary shaft 2. Others are the same as those in the above embodiment, so the same components are denoted by the same reference numerals and detailed description thereof is omitted. In this example, the stator 7 is inclined because it is provided toward the axial center of the hollow rotary shaft 2.
[0025]
In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention. For example, the edge of one end of the stator 7 has a blade shape or a sharp edge so that the object to be dried can be cut, and even if the object to be dried becomes semi-solidified, it can be bitten and divided by the blade shape or the sharp edge. Also good.
[0026]
【The invention's effect】
As described above in detail, according to the drying apparatus of the present invention, the following effects can be obtained.
(1) Since a screw conveyor is rotatably provided along the longitudinal direction of the drum at a position outside the outer diameter of the stirring blade in front of the stator, it is ridden on the stator during the drying process or is about to ride on. Semi-solidified materials to be dried can be moved by a screw conveyor to prevent stagnation. The heat transfer surface can be used effectively, or a drying process can be performed according to the amount of processing planned for drying. Efficiency can be improved.
[0027]
(2) Since the material to be dried is drawn between the rotating stirring blades without riding up and staying on the stator and is smoothly stirred and moved, the heat transfer surface can be used effectively, and the heat transfer surface portion is moved by the stator. Since there is no solidification or adhesion of the material to be dried and there is no co-rotation of the material to be dried, the heat transfer effect is good and the stirring is good, the drying efficiency is improved, and the drying process can be performed in a shorter time than before.
[0028]
(3) When the interval between the stators is wide and rough, the object to be dried does not get on and stay on the stator even if it becomes semi-solid with high viscosity during the drying process. Can be expected.
[0029]
(4) Since the material to be dried is smoothly stirred and moved, there is no load as an unnecessary rotational resistance of the stirring blade, and there is no extreme increase in power.
[0030]
(5) Since the material to be dried is steadily stirred and moved, new materials to be dried can be sequentially added, and the screw conveyor can be used for planned introduction.
[Brief description of the drawings]
FIG. 1 is an explanatory side view of a longitudinal section showing an embodiment of the present invention.
FIG. 2 is a cross-sectional explanatory view taken along a line AA in FIG. 1;
FIG. 3 is a side cross-sectional explanatory view showing another embodiment of the present invention.
4 is a cross-sectional explanatory view taken along line B-B in FIG. 3;
FIG. 5 is a cross-sectional plan view illustrating another embodiment of the present invention.
FIG. 6 is a longitudinal sectional side view showing still another embodiment of the present invention.
FIG. 7 is a front explanatory view of a central longitudinal section showing a conventional example.
FIG. 8 is a cross-sectional plan view illustrating a conventional example.
FIG. 9 is a partially broken front view showing a conventional example.
[Explanation of symbols]
1 Drum 2 Hollow rotating shaft 3 Stirring blade (disc blade)
4 Jacket 7 Stator 8 Mounting plate 9 Hood 10 Passage 11 Screw conveyor 12 Screw shaft 13 Screw blade

Claims (4)

外周面にジャケットを備えた横置筒型のドラムの軸心部に、中空回転軸を回転自在に挿通し、この中空回転軸に中空円盤状の撹拌羽根が多数連設され、ドラムのジャケットに供給された熱媒及び中空回転軸を介して各撹拌羽根内に流通させた熱媒とにより加熱しつつ撹拌羽根を回転させて被乾燥物を撹拌乾燥させる乾燥装置において、
ドラムの上方内周壁面に固着して撹拌羽根と撹拌羽根との間にステータが垂下され、このステータの前方における撹拌羽根の外径より外側位置に、ドラムの長手方向に沿ってスクリューコンベアを設けたことを特徴とする乾燥装置。A hollow rotating shaft is rotatably inserted into the axial center portion of a horizontal cylindrical drum having a jacket on the outer peripheral surface, and a number of hollow disk-shaped stirring blades are continuously connected to the hollow rotating shaft. In the drying apparatus for rotating the stirring blade while heating with the supplied heating medium and the heating medium circulated in each stirring blade via the hollow rotating shaft,
The stator is suspended between the stirring blades and fixed to the upper inner wall surface of the drum, and a screw conveyor is provided along the longitudinal direction of the drum at a position outside the outer diameter of the stirring blades in front of the stator. A drying apparatus characterized by that. 前記スクリューコンベアのスクリュー羽根は、ドラムの略全長にわたって又は間欠的に又は一部分に設けられていることを特徴とする請求項１記載の乾燥装置。2. The drying apparatus according to claim 1, wherein the screw blades of the screw conveyor are provided over substantially the entire length of the drum or intermittently or partially. 前記ステータは、ドラム長手方向に平面視千鳥状に、又は位相をもたせ配設されていることを特徴とする請求項１または２記載の乾燥装置。3. The drying apparatus according to claim 1, wherein the stator is arranged in a zigzag shape in plan view in the drum longitudinal direction or with a phase. 前記ステータの一端側縁部を刃状又はシャープエッジとしたことを特徴とする請求項１乃至３のいずれか１項記載の乾燥装置。The drying apparatus according to any one of claims 1 to 3, wherein the one end side edge portion of the stator has a blade shape or a sharp edge.
JP2001047842A 2001-02-23 2001-02-23 Drying equipment Expired - Lifetime JP3709499B2 (en)

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KR100676503B1 (en) 2006-09-14 2007-02-02 장우기계 주식회사 A inclination-type paddle dryer for drying adhesive sludge phase matter
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