JP2014105916A - Drier device - Google Patents

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JP2014105916A
JP2014105916A JP2012258726A JP2012258726A JP2014105916A JP 2014105916 A JP2014105916 A JP 2014105916A JP 2012258726 A JP2012258726 A JP 2012258726A JP 2012258726 A JP2012258726 A JP 2012258726A JP 2014105916 A JP2014105916 A JP 2014105916A
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JP6065313B2 (en
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Masao Kanai
正夫 金井
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

PROBLEM TO BE SOLVED: To provide a drier capable of positively realizing a quite high drying efficiency.SOLUTION: This drier device 10 is constituted such that rotary scraping-up blades 21, 210 composed of a plurality of base blades 22, 220 arranged vertically in several stages along a rotating shaft 20 are installed within a vertical cylindrical drier tank 11. When each of the scraping-up blades 21, 210 is rotated, items to be dried are pushed against the inner wall of the drier tank due to a centrifugal force in a thin-film like manner and ascend. During this process, hot air is fed into the drier tank 11 from outside and blown against the thin-film like inner periphery side of the items to be dried so as to dry them.

Description

本発明は、縦型円筒形状の乾燥槽内に投入した被乾燥物を巻き上げつつ、前記乾燥槽内壁に押し付け乾燥させる乾燥装置に関する。   The present invention relates to a drying apparatus that presses and drys an object to be dried put in a vertical cylindrical drying tank against the inner wall of the drying tank.

従来、この種の乾燥装置としては、粒状、粉末状、液状、塊状等、種々様々な被乾燥物を乾燥させる装置が知られている。特に本出願人は、サイクロンフィンと呼ばれる独自の羽根の開発により、理想の乾燥条件を実現することができる乾燥装置を既に提案している(例えば、特許文献1,2参照)。   Conventionally, as this type of drying apparatus, apparatuses for drying a variety of objects to be dried such as granular, powdery, liquid, and massive are known. In particular, the present applicant has already proposed a drying apparatus capable of realizing ideal drying conditions by developing a unique blade called a cyclone fin (see, for example, Patent Documents 1 and 2).

すなわち、縦型円筒形状の乾燥槽内に投入された被乾燥物が、回転軸に取り付けられた回転巻上羽根を構成する複数の基羽根の回転により巻き上げられると共に、遠心力により乾燥槽内壁の伝熱面に薄膜状に押し付けられ、後から巻き上げられる被乾燥物が先に巻き上げられた被乾燥物を上方へ押し上げる作用と相俟って、被乾燥物を効率良く乾燥させるものである。   That is, the material to be dried put into the vertical cylindrical drying tank is wound up by the rotation of a plurality of base blades constituting the rotating hoist blades attached to the rotating shaft, and the inner wall of the drying tank is caused by centrifugal force. Combined with the action of the object to be dried, which is pressed onto the heat transfer surface in a thin film and then rolled up later, pushes up the object to be dried which has been previously wound up, the object to be dried is efficiently dried.

この装置は、本出願人がさらに以前に提案している垂直螺旋回転羽根を有する乾燥装置(例えば、特許文献3参照)が有していた課題、すなわち、粘性の強い被乾燥物の羽根・伝熱面への付着と滞留や、基羽根と伝熱面間のクリアランスへの固形物の噛み込み防止、被乾燥物の巻き上げ効率の改善、伝熱面全面の有効活用による乾燥効率の向上等の課題を解決するために提案されたものであった。   This apparatus has a problem that the drying apparatus having a vertical spiral rotary blade proposed by the applicant of the present invention (see, for example, Patent Document 3), that is, a blade / transmission of an object to be dried having a high viscosity. Adhering and staying on the hot surface, preventing the solid matter from getting caught in the clearance between the base blade and the heat transfer surface, improving the winding efficiency of the object to be dried, and improving the drying efficiency by effectively using the entire heat transfer surface It was proposed to solve the problem.

また、回転巻上羽根は一段だけとは限らず、上下に複数段に並ぶように構成したものも開示されている。このように複数段に構成することにより、乾燥物を次々と各段の基羽根によって巻き上げつつ、伝熱面に押し付け乾燥させた被乾燥物を、最上段の基羽根によって巻き上げた後、乾燥物を得る。すなわち、被乾燥物は、乾燥槽の底部から上部まで乾燥されながら連続して上昇するように設計されていた。   In addition, the rotationally wound upper blade is not limited to a single stage, and a structure in which the rotating upper and lower blades are arranged in a plurality of stages vertically is also disclosed. By constructing in multiple stages in this way, the dried product is rolled up by the base blades at each stage while the dried product is rolled up by the top blades after being dried and pressed against the heat transfer surface. Get. That is, the material to be dried was designed to rise continuously while being dried from the bottom to the top of the drying tank.

特許第2840639号公報Japanese Patent No. 2840639 特許第2958869号公報Japanese Patent No. 29958869 実開平3−19501号公報Japanese Utility Model Publication No. 3-19501

前述した特許文献1,2に記載された乾燥装置は、回転巻上羽根を多段に構成することで、よりいっそう乾燥効率を高めることができるものであったが、多段に構成することに起因して幾つかの解決すべき問題点が新たに生じていた。   The drying apparatus described in Patent Documents 1 and 2 described above can further increase the drying efficiency by configuring the rotary winding upper blade in multiple stages. Some new problems have arisen.

すなわち、被乾燥物を、最下段の回転巻上羽根から最上段の回転巻上羽根まで連続して上昇させることで、初めて縦型の利点を生かした非常に高い乾燥効率を実現できるが、被乾燥物を各段ごとに順次上昇させるためには、各段間における基羽根の相対的な配置や間隔(クリアランス)が極めて重要となるが、その具体的な配置の設定が非常に煩雑で難しいという問題があった。   That is, by continuously raising the material to be dried from the lowermost rotating upper blade to the uppermost rotating upper blade, it is possible to realize very high drying efficiency taking advantage of the vertical type for the first time. In order to raise the dry matter sequentially for each stage, the relative arrangement and spacing (clearance) of the base blades between the stages are extremely important, but setting the specific arrangement is very complicated and difficult. There was a problem.

さらに、回転巻上羽根を多段に構成することとは別に、一段あるいは多段に拘わらず、よりいっそう乾燥効率を高めるための工夫が望まれていた。例えば、被乾燥物は乾燥槽内壁の伝熱面に対して薄膜状に接触することで加熱され、含水率の低くなった被乾燥物は薄膜状の内周側の蒸発面に移動して水分が蒸発するが、この薄膜状の外周側が接する伝熱面による加熱の代わりに、内周側の蒸発面における加熱も研究されていた。   Further, apart from configuring the rotary winding upper blade in multiple stages, there has been a demand for a device for further increasing the drying efficiency regardless of whether it is one stage or multiple stages. For example, the material to be dried is heated by coming into contact with the heat transfer surface of the inner wall of the drying tank in a thin film shape, and the material to be dried whose moisture content has decreased moves to the evaporation surface on the inner peripheral side of the thin film to However, instead of heating by the heat transfer surface with which the outer peripheral side of the thin film contacts, heating on the evaporation surface on the inner peripheral side has also been studied.

本発明は、前述したような従来の技術が有する問題点に着目してなされたものであり、乾燥槽内における加熱を工夫することにより、回転巻上羽根が多段であるか否かを問わず、よりいっそう乾燥効率を格段に高めることができ、また、回転巻上羽根が多段である場合に、各段間において被乾燥物を円滑に順次上昇させることができ、縦型の利点を生かした非常に高い乾燥効率を確実に実現することができる乾燥装置を提供することを目的としている。   The present invention has been made paying attention to the problems of the prior art as described above, and it is possible to devise heating in the drying tank regardless of whether the rotary hoist blades are multistage. In addition, the drying efficiency can be further enhanced, and when the rotating upper and lower blades are multi-stage, the object to be dried can be raised smoothly and sequentially between the stages, taking advantage of the advantage of the vertical type. It aims at providing the drying apparatus which can implement | achieve very high drying efficiency reliably.

本件発明者らは、乾燥装置に関する鋭意検討の結果、縦型円筒形状の乾燥槽内部に回転巻上羽根を備えた乾燥装置において、乾燥槽内壁の加熱に代えて、あるいは加えて乾燥槽内に熱風を導入することにより、回転巻上羽根が多段であるか否かを問わず、よりいっそう乾燥効率を格段に高めることができることを明らかにした。   As a result of intensive studies on the drying apparatus, the inventors of the present invention, in a drying apparatus provided with a rotary upper blade inside a vertical cylindrical drying tank, instead of or in addition to heating the inner wall of the drying tank, It has been clarified that by introducing hot air, it is possible to further increase the drying efficiency, regardless of whether the rotating upper blade is multi-staged or not.

また、回転巻上羽根を上下に並ぶ複数段にした場合に、各段間における基羽根の相対的な配置を特別な配置に設定したり、各段の間隔(クリアランス(F))を適切な値に設定することによって、縦型の利点を生かした非常に高い乾燥効率を実現できることを明らかにした。   Further, when the rotary winding upper and lower blades are arranged in a plurality of stages, the relative arrangement of the base blades between the stages is set to a special arrangement, or the interval (clearance (F)) between the stages is set appropriately. It was clarified that by setting the value, very high drying efficiency can be realized taking advantage of the vertical type.

かかる結論に鑑みて、前述した目的を達成するための本発明の要旨とするところは、以下の各項に存する。
[1]被乾燥物が投入される縦型円筒形状の乾燥槽(11,11A,11B)と、前記乾燥槽(11,11A,11B)内中心部に設けた縦方向に延びる回転軸(20)に取り付けた回転巻上羽根(21,210,31,310)と、を有する乾燥装置(10,10A,10B)において、
前記回転巻上羽根(21,210,31,310)は、前記回転軸(20)を中心に円周方向に並ぶように配された複数の基羽根(22,220,32,320)から成り、各基羽根(22,220,32,320)は、平面視でそれぞれが円周方向に延び、被乾燥物をそれぞれの一端部から載せて他端部に移動させつつ巻き上げ可能な平坦面(23,230,33,330)を有し、この平坦面(23,230,33,330)は、回転方向と逆方向に向かい一端部から他端部にかけて斜め上方に延びるように形成され、
前記回転巻上羽根(21,210,31,310)は、前記回転軸(20)の回転に伴って被乾燥物を、各基羽根(22,220,32,320)の平坦面(23,230,33,330)上に載せて一端部から他端部へと巻き上げつつ、遠心力により前記乾燥槽内壁(12)に薄膜状に押し付け、かつ該内壁(12)に沿って連続して上昇させ、
被乾燥物が上昇する過程で、前記乾燥槽(11,11A,11B)内に外部から熱風を導入して、該熱風を被乾燥物の薄膜状の内周側に吹き付けることにより、該内周側より被乾燥物を加熱して水分蒸発を推進させることを特徴とする乾燥装置(10,10A,10B)。
In view of this conclusion, the gist of the present invention for achieving the above-described object resides in the following items.
[1] A vertical cylindrical drying tank (11, 11A, 11B) into which an object to be dried is put, and a rotary shaft (20) extending in the vertical direction provided in the center of the drying tank (11, 11A, 11B). In the drying device (10, 10A, 10B) having the rotary winding upper blade (21, 210, 31, 310) attached to
The rotating hoist blades (21, 210, 31, 310) are composed of a plurality of base blades (22, 220, 32, 320) arranged in a circumferential direction around the rotating shaft (20). Each of the base blades (22, 220, 32, 320) extends in the circumferential direction in plan view, and can be rolled up while moving an object to be dried from one end portion to the other end portion ( 23, 230, 33, 330), and the flat surface (23, 230, 33, 330) is formed so as to extend obliquely upward from one end to the other end in the direction opposite to the rotational direction,
The rotating hoist blades (21, 210, 31, 310) are configured to move the object to be dried along with the rotation of the rotating shaft (20) to the flat surfaces (23, 23, 320) of the base blades (22, 220, 32, 320). 230, 33, 330) while being rolled up from one end to the other end, pressed against the inner wall (12) of the drying tank by a centrifugal force in a thin film form, and continuously raised along the inner wall (12) Let
In the process of raising the object to be dried, hot air is introduced from the outside into the drying tank (11, 11A, 11B), and the hot air is blown toward the inner peripheral side of the thin film of the object to be dried. A drying apparatus (10, 10A, 10B) characterized in that the object to be dried is heated from the side to promote moisture evaporation.

[2]被乾燥物が投入される縦型円筒形状の乾燥槽(11,11A,11B)と、前記乾燥槽内壁(12)を加熱する加熱手段と、前記乾燥槽(11,11A,11B)内中心部に設けた縦方向に延びる回転軸(20)に取り付けた回転巻上羽根(21,210,31,310)と、を有する乾燥装置(10,10A,10B)において、
前記回転巻上羽根(21,210,31,310)は、前記回転軸(20)を中心に円周方向に並ぶように配された複数の基羽根(22,220,32,320)から成り、各基羽根(22,220,32,320)は、平面視でそれぞれが円周方向に延び、被乾燥物をそれぞれの一端部から載せて他端部に移動させつつ巻き上げ可能な平坦面(23,230,33,330)を有し、この平坦面(23,230,33,330)は、回転方向と逆方向に向かい一端部から他端部にかけて斜め上方に延びるように形成され、
前記回転巻上羽根(21,210,31,310)は、前記回転軸(20)の回転に伴って被乾燥物を、各基羽根(22,220,32,320)の平坦面(23,230,33,330)上に載せて一端部から他端部へと巻き上げつつ、遠心力により前記乾燥槽内壁(12)に薄膜状に押し付け、かつ該内壁(12)に沿って連続して上昇させ、
被乾燥物が上昇する過程で、前記乾燥槽内壁(12)より加熱されて含水率の低くなった被乾燥物が薄膜状の内周側の蒸発面(E)に移動しつつ水分蒸発が推進され、加えて前記乾燥槽(11,11A,11B)内に外部から熱風を導入して、該熱風を被乾燥物の薄膜状の内周側に吹き付けることにより、該内周側からも被乾燥物を加熱して前記蒸発面(E)における水分蒸発を促進させることを特徴とする乾燥装置(10,10A,10B)。
[2] Vertical cylindrical drying tank (11, 11A, 11B) into which an object to be dried is put, heating means for heating the drying tank inner wall (12), and the drying tank (11, 11A, 11B) In a drying device (10, 10A, 10B) having a rotary hoist blade (21, 210, 31, 310) attached to a longitudinally extending rotary shaft (20) provided in the inner center portion,
The rotating hoist blades (21, 210, 31, 310) are composed of a plurality of base blades (22, 220, 32, 320) arranged in a circumferential direction around the rotating shaft (20). Each of the base blades (22, 220, 32, 320) extends in the circumferential direction in plan view, and can be rolled up while moving an object to be dried from one end portion to the other end portion ( 23, 230, 33, 330), and the flat surface (23, 230, 33, 330) is formed so as to extend obliquely upward from one end to the other end in the direction opposite to the rotational direction,
The rotating hoist blades (21, 210, 31, 310) are configured to move the object to be dried along with the rotation of the rotating shaft (20) to the flat surfaces (23, 23, 320) of the base blades (22, 220, 32, 320). 230, 33, 330) while being rolled up from one end to the other end, pressed against the inner wall (12) of the drying tank by a centrifugal force in a thin film form, and continuously raised along the inner wall (12) Let
In the process of raising the object to be dried, moisture evaporation is promoted while the object to be dried which has been heated from the inner wall (12) of the drying tank and has a low moisture content moves to the evaporation surface (E) on the inner peripheral side of the thin film. In addition, hot air is introduced into the drying tank (11, 11A, 11B) from the outside, and the hot air is blown to the inner peripheral side of the thin film to be dried, so that the inner peripheral side is also dried. A drying apparatus (10, 10A, 10B) which heats an object to promote moisture evaporation on the evaporation surface (E).

[3]前記熱風は、前記乾燥槽(11,11A,11B)の底部において中心側より側方に向けて吹き出され、前記回転巻上羽根(21,210,31,310)の回転より生じる気流と遠心力により渦巻き状になって上昇しつつ、前記被乾燥物の薄膜状の内周側に吹き付けられることを特徴とする[1]または[2]に記載の乾燥装置(10,10A,10B)。   [3] The hot air is blown from the center side to the side at the bottom of the drying tank (11, 11A, 11B), and is generated by the rotation of the rotary upper blade (21, 210, 31, 310). The drying apparatus (10, 10A, 10B) according to [1] or [2], wherein the drying object is blown up to a thin film-like inner peripheral side of the object to be dried while being swirled by centrifugal force. ).

[4]前記乾燥工程中に前記乾燥槽(11,11A,11B)内で発生する廃ガスを導いて燃焼させ無害化する燃焼炉を備え、
前記燃焼炉における燃焼で生じた熱風を、前記乾燥工程中の前記乾燥槽(11,11A,11B)内に導入することを特徴とする[1],[2]または[3]に記載の乾燥装置(10,10A,10B)。
[4] A combustion furnace for detoxifying the waste gas generated in the drying tank (11, 11A, 11B) during the drying step is introduced,
The drying according to [1], [2] or [3], wherein hot air generated by combustion in the combustion furnace is introduced into the drying tank (11, 11A, 11B) in the drying step. Device (10, 10A, 10B).

[5]前記回転巻上羽根(21,210,31,310)は、前記回転軸(20)に沿って上下に並ぶ複数段に配設され、
複数段の回転巻上羽根(21,210,31,310)は、前記回転軸(20)に沿って並ぶ上下間において、それぞれの各基羽根(22,220,32,320)が平面視で所定角度ずつ位相がずれ、回転方向と逆方向に延びる多重螺旋階段状に並ぶように配設され、最下段の回転巻上羽根(21,31)から最上段の回転巻上羽根(210,310)まで前記乾燥工程が連続して順次繰り返されるように設定され、
前記回転巻上羽根(21,210,31,310)の各基羽根(22,220,32,320)の平坦面(23,230,33,330)は、平面視で360度の円周範囲内の長さで細幅形状に延び、かつ最下段を除く他の段の回転巻上羽根(210,310)における各基羽根(220,320)の平坦面(230,330)は、平面視で同一円周上に並ぶ隣り合う基羽根(220,320)同士の平坦面(230,330)が円周方向に互いに重ならない長さに設定され、
複数段の回転巻上羽根(21,210,31,310)において、上下に並ぶそれぞれの各基羽根(22,220,32,320)は、下方の基羽根(22,220,32,320)の他端部に対して、回転方向と逆方向の間近に位置する上方の基羽根(220,320)の一端部が、平面視で重ならずに前記逆方向に離隔し、前記下方の基羽根(22,220,32,320)の他端部における平坦面(23,230,33,330)を延長した傾斜面より下方に位置しつつ前記多重螺旋階段状に並ぶことを特徴とする[1],[2],[3]または[4]に記載の乾燥装置(10,10A,10B)。
[5] The rotary winding upper blades (21, 210, 31, 310) are arranged in a plurality of stages arranged vertically along the rotation axis (20),
The plurality of rotary winding upper blades (21, 210, 31, 310) have their respective base blades (22, 220, 32, 320) in plan view between the upper and lower sides arranged along the rotation axis (20). The phases are shifted by a predetermined angle and arranged in a multi-spiral staircase extending in the opposite direction to the rotation direction. The lowermost rotary hoist blades (21, 31) to the uppermost rotary hoist blades (210, 310) are arranged. ) Until the drying process is repeated continuously and sequentially,
The flat surfaces (23, 230, 33, 330) of the base blades (22, 220, 32, 320) of the rotary winding upper blades (21, 210, 31, 310) have a circumferential range of 360 degrees in plan view. The flat surfaces (230, 330) of the base blades (220, 320) of the rotary winding blades (210, 310) of the other stages excluding the lowest stage extend in a narrow shape with the inner length in plan view. The flat surfaces (230, 330) of adjacent base blades (220, 320) arranged on the same circumference are set to lengths that do not overlap each other in the circumferential direction,
In the plurality of stages of rotary winding upper blades (21, 210, 31, 310), the respective base blades (22, 220, 32, 320) arranged in the vertical direction are arranged on the lower base blades (22, 220, 32, 320). One end portion of the upper base blade (220, 320) located in the vicinity of the rotation direction opposite to the rotation direction is separated from the other end portion in the reverse direction without overlapping in the plan view, and the lower base blade The flat surface (23, 230, 33, 330) at the other end of the blade (22, 220, 32, 320) is arranged below the inclined surface extending and arranged in the shape of the multiple spiral staircase [ The drying apparatus (10, 10A, 10B) according to [1], [2], [3] or [4].

[6]複数段の回転巻上羽根(21,210,31,310)の上下間のクリアランスは、回転巻上羽根(21,210,31,310)の各基羽根(22,220,32,320)の他端部最上端からその一段上の回転巻上羽根(210,310)の各基羽根(220,320)の一端部最下端までの寸法が、各基羽根(22,220,32,320)の平坦面(23,230,33,330)の最外周端を結ぶ円直径の0〜15%となる比率として、最下段の回転巻上羽根(21,31)から最上段の回転巻上羽根(210,310)まで前記乾燥工程が連続して順次繰り返されるように設定したことを特徴とする[5]に記載の乾燥装置(10,10A,10B)。   [6] The clearance between the upper and lower sides of the plurality of stages of rotating hoist blades (21, 210, 31, 310) is determined by the base blades (22, 220, 32, 310) of the rotating hoist blades (21, 210, 31, 310). 320), the dimension from the uppermost end of the other end portion to the lowermost end of one end portion of each base blade (220, 320) of the rotary winding upper blade (210, 310) on the one stage is the base blade (22, 220, 32). , 320) as the ratio of 0 to 15% of the circle diameter connecting the outermost peripheral ends of the flat surfaces (23, 230, 33, 330), the uppermost rotation from the lowermost rotary winding blade (21, 31). The drying apparatus (10, 10A, 10B) according to [5], wherein the drying step is set to be repeated sequentially and continuously up to the hoisting blades (210, 310).

[7]最上段の回転巻上羽根(210)の上方に、前記乾燥槽(11)内壁(12)に設けられ、前記最上段の回転巻上羽根(210)より上方に向かう薄膜状の被乾燥物を受け止めて、回転巻上羽根(210)の内側より下方へ落下させる受止板(30)を配設し、
前記受止板(30)は、その面が前記回転巻上羽根(210)の回転方向と対向するように配される板状の部材から成り、2以上が円周方向に並ぶように配されることを特徴とする[5]または[6]に記載の乾燥装置(10)。
[7] A thin film-shaped covering provided on the inner wall (12) of the drying tank (11) above the uppermost rotating upper blade (210) and directed upward from the uppermost rotating upper blade (210). A receiving plate (30) for receiving the dried material and dropping it downward from the inside of the rotary winding upper blade (210) is disposed,
The receiving plate (30) is composed of a plate-like member arranged so that its surface faces the rotational direction of the rotary hoist blade (210), and two or more are arranged in the circumferential direction. The drying apparatus (10) according to [5] or [6].

次に、前述した解決手段に基づく作用を説明する。
前記[1]に記載の乾燥装置(10,10A,10B)によれば、回転巻上羽根(21,210,31,310)が回転軸(20)の回転に伴って回転すると、各基羽根(22,220,32,320)ごとに被乾燥物を平坦面(23,230,33,330)の一端部から他端部へと巻き上げつつ、遠心力により乾燥槽内壁(12)に薄膜状に押し付け、かつ該内壁(12)に沿って連続して上昇させる。
Next, the operation based on the above solution will be described.
According to the drying apparatus (10, 10A, 10B) described in [1], when the rotary hoist blades (21, 210, 31, 310) rotate with the rotation of the rotating shaft (20), each base blade While winding the material to be dried from one end of the flat surface (23, 230, 33, 330) to the other end for each (22, 220, 32, 320), a thin film is formed on the inner wall (12) of the drying tank by centrifugal force. And continuously raised along the inner wall (12).

粘性の強い被乾燥物であっても、各基羽根(22,220,32,320)や乾燥槽内壁(12)に付着しにくく、たとえ付着しても被乾燥物を各基羽根(22,220,32,320)によって乾燥槽内壁(12)全面に渡って巻き上げ上昇させるので、被乾燥物が停滞することがない。   Even if the object to be dried is highly viscous, it is difficult to adhere to each base blade (22, 220, 32, 320) and the inner wall (12) of the drying tank. 220, 32, 320), the material to be dried does not stagnate because the entire surface of the inner wall (12) of the drying tank is wound up and raised.

各基羽根(22,220,32,320)の平坦面(23,230,33,330)は、乾燥槽内壁(12)に沿った細長形状となり、一端部から他端部に向かって斜め上方に延びているから、単に被乾燥物に衝撃を与えるのではなく、被乾燥物の巻き上げ作用と乾燥槽内壁(12)への押し付け作用を効果的に発揮させることができる。   The flat surface (23, 230, 33, 330) of each base blade (22, 220, 32, 320) has an elongated shape along the inner wall (12) of the drying tank, and obliquely upwards from one end to the other end. Therefore, the object to be dried can be effectively rolled up and pressed against the inner wall (12) of the drying tank.

このように被乾燥物が上昇する過程において、前記乾燥槽(11,11A,11B)内に外部から熱風を導入して、該熱風を被乾燥物の薄膜状の内周側に吹き付けることにより、該内周側より被乾燥物を加熱して水分蒸発を推進させる。被乾燥物は乾燥槽内壁(12)に沿って薄膜状に拡がるが、ここで被乾燥物が空気に接する内周側より熱風があたり積極的に加熱されるため、加熱効率を高めることができる。   In the process of raising the object to be dried in this way, by introducing hot air from outside into the drying tank (11, 11A, 11B) and blowing the hot air on the inner peripheral side of the object to be dried, The object to be dried is heated from the inner peripheral side to promote moisture evaporation. The object to be dried spreads out in a thin film shape along the inner wall (12) of the drying tank. However, since the object to be dried is heated positively from the inner peripheral side in contact with the air, the heating efficiency can be increased. .

また、前記[2]に記載の乾燥装置(10,10A,10B)によれば、被乾燥物が乾燥槽内壁(12)に沿って薄膜状に上昇する過程において、乾燥工程中においては、乾燥槽内壁(12)より加熱されて含水率の低くなった被乾燥物は、薄膜状の内周側となる蒸発面(E)に移動しつつ水分蒸発が推進される。   Further, according to the drying apparatus (10, 10A, 10B) described in [2], in the process in which the material to be dried rises in a thin film shape along the inner wall (12) of the drying tank, the drying is performed during the drying process. The object to be dried which has been heated from the tank inner wall (12) and has a low water content moves to the evaporation surface (E) on the inner peripheral side of the thin film and promotes water evaporation.

これに加えて、乾燥槽(11,11A,11B)内に外部から熱風を導入して、該熱風を被乾燥物の薄膜状の内周側に吹き付ける。被乾燥物は上方に向かって徐々に乾燥槽内壁(12)と蒸発面(E)が近くなるような薄膜状に拡がるが、加熱手段で加熱されている乾燥槽内壁(12)に接した外周側のみならず、内周側からも熱風により積極的に加熱されるため、前記蒸発面(E)における水分蒸発がよりいっそう促進されることになる。   In addition to this, hot air is introduced into the drying tank (11, 11A, 11B) from the outside, and the hot air is blown to the thin film-like inner peripheral side of the object to be dried. The object to be dried spreads upward in a thin film shape so that the inner wall (12) of the drying tank and the evaporation surface (E) are close to each other, but the outer periphery in contact with the inner wall (12) of the drying tank heated by the heating means. Since the hot air is positively heated not only from the side but also from the inner peripheral side, water evaporation on the evaporation surface (E) is further promoted.

前記[3]に記載したように、前記熱風は、乾燥槽(11,11A,11B)の底部において中心側より側方に向けて吹き出され、回転巻上羽根(21,210,31,310)の回転より生じる気流と遠心力により渦巻き状になって上昇しつつ、被乾燥物の薄膜状の内周側に吹き付けられる。これにより、乾燥槽(11,11A,11B)内部の気流と熱風とが衝突し合うことがなく、前述した被乾燥物の巻き上げ作用を損ねる虞はなく、被乾燥物の薄膜状の内周側に満遍なく吹き付けることができる。   As described in [3] above, the hot air is blown from the center side to the side at the bottom of the drying tank (11, 11A, 11B), and the rotating hoist blades (21, 210, 31, 310). While being raised in a spiral shape due to the airflow and centrifugal force generated by the rotation, the air is blown to the inner peripheral side of the object to be dried. As a result, the air flow inside the drying tank (11, 11A, 11B) and the hot air do not collide with each other, and there is no risk of impairing the winding action of the object to be dried, and the inner peripheral side of the object to be dried Can be sprayed evenly.

また、前記熱風の発生源は特に問わないが、前記[4]に記載したように、乾燥装置(10,10A,10B)が乾燥槽(11,11A,11B)内で発生する廃ガスを導き、燃焼させて無害化する燃焼炉を備える場合には、この燃焼炉における燃焼で生じた熱風を乾燥槽(11,11A,11B)内に導入すれば良い。このように、燃焼炉を熱風の発生源として利用することにより、ランニングコストを低減することが可能となる。   The source of the hot air is not particularly limited, but as described in [4] above, the drying device (10, 10A, 10B) guides the waste gas generated in the drying tank (11, 11A, 11B). When a combustion furnace that is made harmless by burning is provided, hot air generated by combustion in this combustion furnace may be introduced into the drying tank (11, 11A, 11B). Thus, the running cost can be reduced by using the combustion furnace as a source of hot air.

ここで、燃焼炉における燃焼で生じた熱風を、前記乾燥槽内壁(12)の加熱手段として利用しても良い。このように、燃焼炉からの熱風を有効に活用することにより、前記乾燥槽内壁(12)の加熱手段を別途用意する必要がなく、よりいっそうランニングコストを低減することが可能となる。   Here, you may utilize the hot air produced by combustion in a combustion furnace as a heating means of the said drying tank inner wall (12). Thus, by effectively utilizing the hot air from the combustion furnace, there is no need to separately prepare a heating means for the inner wall (12) of the drying tank, and the running cost can be further reduced.

ところで、本乾燥装置(10,10A,10B)で処理する被乾燥物の種類は様々であり、一定の水分含量や重量であるとは限らない。また、同じ被乾燥物であっても、最初は未だ水分含量が多く重量があり、容易に遠心力が生じたり惰性である程度上昇しやすいが、乾燥により水分蒸発が進むと、重量が軽くなり遠心力も生じなくなり、縦方向への上昇力も乏しくなる。かかる事実に鑑み、種々様々な被乾燥物を最初から最後まで、如何に乾燥槽内壁(12)に薄膜状に押し付けるか、そして縦方向に上昇させるかが、重要な課題であった。   By the way, the kind of to-be-dried material processed with this drying apparatus (10, 10A, 10B) is various, and it does not necessarily have a fixed water content and weight. In addition, even if the same material to be dried, the water content is still high at the beginning and the weight is high. Centrifugal force is easily generated or it tends to rise to some extent due to inertia. No force will be generated, and the ascending force in the vertical direction will be poor. In view of this fact, it was an important issue how to press various kinds of objects to be dried from the beginning to the end in the form of a thin film against the inner wall (12) of the drying tank and to raise it in the vertical direction.

被乾燥物を縦方向に上昇させる巻き上げ作用に関しては、回転巻上羽根(21,210,31,310)を回転軸(20)に沿って上下に並ぶ複数段に配設した場合に、上下に並ぶ各段の回転巻上羽根(21,210,31,310)ごとの間隔を一定にした状態であれば、回転巻上羽根(21,210,31,310)の直径による回転数(周速度)と密接な関係があり、これらの相関関係が多少変動したとしても、回転巻上羽根(21,210,31,310)の直径の1/2〜2/3程度の高さまでは、特に前記押し付け作用を考慮しなければ容易に上昇させることができる。   With regard to the hoisting action for raising the material to be dried in the vertical direction, when the rotary winding upper blades (21, 210, 31, 310) are arranged in a plurality of stages lined up and down along the rotation axis (20), they are moved up and down. If the interval between the rotating hoist blades (21, 210, 31, 310) of each stage is constant, the rotational speed (circumferential speed) depending on the diameter of the rotating hoist blades (21, 210, 31, 310). ), And even if these correlations vary somewhat, especially at a height of about 1/2 to 2/3 of the diameter of the rotary winding upper blade (21, 210, 31, 310), If the pressing action is not considered, it can be easily raised.

しかし、この程度の上昇だけでは、乾燥槽内壁(12)の縦方向において被乾燥物が接触しない面積が比較的大きく、乾燥槽内壁(12)全面を有効に活用しないことになり、縦型の利点を生かした乾燥効率の向上が望めなかった。ここで、被乾燥物を縦方向にさらに上昇させるためには、回転巻上羽根(21,210,31,310)の回転による遠心力や羽根の角度の工夫だけでは限界があった。   However, only by this level of rise, the area of the drying vessel inner wall (12) where the material to be dried does not contact is relatively large, and the entire surface of the drying vessel inner wall (12) is not used effectively. We could not expect improvement in drying efficiency taking advantage of the advantage. Here, in order to further raise the material to be dried in the vertical direction, there has been a limit to only the device of the centrifugal force and the angle of the blade due to the rotation of the rotary hoist blades (21, 210, 31, 310).

そこで、発明者らは様々な実験を行った結果、被乾燥物を縦方向にさらに上昇させるため、すなわち巻き上げ力を高めるために重要となるのが、各段の回転巻上羽根(21,210,31,310)における上下間の基羽根(22,220,32,320)の相対的な配置であることを突き止めた。被乾燥物の当初の水分含量や、乾燥が進み水分含量が減少して当初の遠心力や惰力が次第に減少することを考慮し、前記上下間の基羽根(22,220,32,320)の相対的な配置を特別な配置に設定すれば、回転巻上羽根(21,210,31,310)の直径の3〜4倍程度の高さまで被乾燥物を上昇させることができた。   Thus, as a result of various experiments, the inventors have found that it is important to further raise the material to be dried in the vertical direction, that is, to increase the hoisting force. , 31, 310), the relative arrangement of the base blades (22, 220, 32, 320) between the upper and lower sides was determined. Considering that the initial moisture content of the material to be dried and the moisture content decreases and the initial centrifugal force and repulsive force gradually decrease, the upper and lower base blades (22, 220, 32, 320) If the relative arrangement of is set to a special arrangement, the material to be dried could be raised to a height of about 3 to 4 times the diameter of the rotary hoist blades (21, 210, 31, 310).

以上のような実証を踏まえて発明者らは鋭意検討した結果、最適な押し付け作用と巻き上げ作用を両立させるためには、各段の回転巻上羽根(21,210,31,310)における上下間の基羽根(22,220,32,320)の相対的な配置を特別な配置に設定することが重要であり、この特別な配置は、前記[5]に記載した構成であることを明らかにした。   As a result of intensive investigations based on the above demonstration, the inventors have found that in order to achieve both an optimal pressing action and a hoisting action, the upper and lower spaces in the rotating hoist blades (21, 210, 31, 310) of each stage It is important to set the relative arrangement of the base blades (22, 220, 32, 320) of the cylinder to a special arrangement, and this special arrangement is clearly the configuration described in [5] above. did.

すなわち、前記[5]に記載の乾燥装置(10,10A,10B)によれば、回転巻上羽根(21,210,31,310)が上下に複数段あることにより、各段ごとに被乾燥物を巻き上げつつ、薄膜状に乾燥槽内壁(12)に押し付け、後から巻き上げる被乾燥物で先に巻き上げた被乾燥物を一段上まで押すように上昇させる。ここで重要となるのが、前述したように各段の回転巻上羽根(21,210,31,310)における上下間の基羽根(22,220,32,320)の相対的な配置であり、具体的には、複数段の回転巻上羽根(21,210,31,310)を、回転軸(20)に沿って並ぶ上下間において、それぞれの各基羽根(22,220,32,320)が平面視で所定角度ずつ位相がずれ、回転方向と逆方向に延びる多重螺旋階段状に並ぶように配設する。   That is, according to the drying apparatus (10, 10A, 10B) described in [5] above, the rotary winding upper blades (21, 210, 31, 310) have a plurality of upper and lower stages, so that each stage is dried. While rolling up the product, it is pressed against the inner wall (12) of the drying tank in the form of a thin film, and then the product to be dried that has been rolled up later is pushed up to push up to one level. What is important here is the relative arrangement of the base blades (22, 220, 32, 320) between the upper and lower sides of the rotary winding upper blades (21, 210, 31, 310) of each stage as described above. Specifically, each of the base blades (22, 220, 32, 320) is arranged between the upper and lower rows of the plurality of stages of the rotating hoist blades (21, 210, 31, 310) along the rotation axis (20). ) Are arranged so that their phases are shifted by a predetermined angle in a plan view and arranged in a multiple spiral staircase extending in the direction opposite to the rotation direction.

このような特別な配置により、下の段の基羽根(22,220,32,320)で巻き上げられて斜め上方に移動する被乾燥物が、上の段の回転している基羽根(220,320)の下面で押さえられることがなく、上の段の基羽根(220,320)の一端部にタイミング良くすくい上げられるようにして、被乾燥物は各基羽根(22,220,32,320)の多重螺旋階段を上るように順次移動する。これにより、最下段の回転巻上羽根(21,31)から最上段の回転巻上羽根(210,310)まで、被乾燥物を連続して乾燥しつつ順次上昇させることができ、乾燥槽内壁(12)の縦方向における全面を有効に活用することになり、縦型の利点を生かした非常に高い乾燥効率を確実に実現することができる。   Due to such a special arrangement, an object to be dried which is wound up by the lower stage blades (22, 220, 32, 320) and moves obliquely upward is rotated by the upper stage rotating base blades (220, 220). 320) so that the material to be dried can be scooped up at one end of the upper stage blades (220, 320) in a timely manner without being pressed by the lower surface of the upper blades (22, 220, 32, 320). Move sequentially up the multiple spiral stairs. Thus, the object to be dried can be sequentially raised while continuously drying from the lowermost rotary upper blade (21, 31) to the uppermost rotary upper blade (210, 310). The entire surface in the vertical direction of (12) is effectively used, and very high drying efficiency can be reliably realized by taking advantage of the vertical type.

また、回転巻上羽根(21,210,31,310)の各基羽根(22,220,32,320)の平坦面(230,330)は、平面視で360度の円周範囲内の長さしか有さず、独立しているので、各基羽根(22,220,32,320)の平坦面(23,230,33,330)の外周端と乾燥槽内壁(12)との間のクリアランスも、各基羽根(22,220,32,320)間に連続して連ならず非連続に分断される。これにより、異物がクリアランスに噛み込み難くなり、仮に噛み込んだとしても直ちに逃げ、噛み込みが継続することがなく、各基羽根(22,220,32,320)を円滑に回転させることができる。   Further, the flat surfaces (230, 330) of the base blades (22, 220, 32, 320) of the rotary winding upper blades (21, 210, 31, 310) are long in a circumferential range of 360 degrees in plan view. However, since it is independent, it is between the outer peripheral end of the flat surface (23, 230, 33, 330) of each base blade (22, 220, 32, 320) and the inner wall (12) of the drying tank. The clearance is not continuously connected between the base blades (22, 220, 32, 320) but is discontinuously divided. This makes it difficult for foreign matter to bite into the clearance, and even if it is bitten, it immediately escapes and does not continue to bite, and each base blade (22, 220, 32, 320) can be smoothly rotated. .

しかも、最下段を除く他の段の回転巻上羽根(210,310)における各基羽根(220,320)の平坦面(23,230,33,330)は、平面視で同一円周上に並ぶ隣り合う基羽根(220,320)同士の平坦面(230,330)が円周方向に互いに重ならない長さに設定されている。これにより、各基羽根(220,320)を上下間で所定角度ずつ位相がずれるように配置する設定が容易であり、特に、多重螺旋階段状に並ぶように適切な位置での配置が可能となる。   In addition, the flat surfaces (23, 230, 33, 330) of the base blades (220, 320) in the rotating hoist blades (210, 310) of the other stages except the lowest stage are on the same circumference in plan view. The flat surfaces (230, 330) between the adjacent base blades (220, 320) are set to a length that does not overlap each other in the circumferential direction. Accordingly, it is easy to set the base blades (220, 320) so that the phases are shifted by a predetermined angle between the upper and lower sides, and in particular, the base blades can be arranged at appropriate positions so as to be arranged in a multi-spiral staircase pattern. Become.

前記特別な配置について詳しく言えば、複数段の回転巻上羽根(21,210,31,310)において、上下に並ぶそれぞれの各基羽根(22,220,32,320)を、下方の基羽根(22,220,32,320)の他端部に対して、回転方向と逆方向の間近に位置する上方の基羽根(220,320)の一端部が、平面視で重ならずに前記逆方向に離隔し、前記下方の基羽根(22,220,32,320)の他端部における平坦面(23,230,33,330)を延長した傾斜面より下方に位置するように配置して、前記多重螺旋階段状に並ぶようにする。これにより、下の段の基羽根(22,220,32,320)で巻き上げられて斜め上方に移動する被乾燥物を、上の段の基羽根(220,320)の一端部に確実に受け渡すことができる。   If it says in detail about the said special arrangement | positioning, each base blade (22,220,32,320) lined up and down in a multistage rotary winding upper blade (21,210,31,310) will be made into a lower base blade. One end of the upper base blade (220, 320) located in the vicinity of the opposite direction to the rotation direction with respect to the other end of (22, 220, 32, 320) does not overlap in the plan view. The flat surface (23, 230, 33, 330) at the other end of the lower base blade (22, 220, 32, 320) is positioned so as to be positioned below the inclined surface that is extended. And arranged in a multiple spiral staircase pattern. As a result, an object to be dried that is wound up by the lower stage base blades (22, 220, 32, 320) and moves obliquely upward is reliably received by one end of the upper stage base blades (220, 320). Can pass.

さらに、発明者らは様々な実験を行った結果、被乾燥物を縦方向に効率良く上昇させるため、すなわち巻き上げ力を高めるために重要となるのが、各段の回転巻上羽根(21,210,31,310)における上下間のクリアランスであることを突き止めた。被乾燥物の当初の水分含量や、乾燥が進み水分含量が減少して当初の遠心力や惰力が次第に減少することを考慮し、前記上下間のクリアランスを適宜設定すれば、回転巻上羽根(21,210,31,310)の直径の3〜4倍程度の高さまで被乾燥物を上昇させることができた。   Furthermore, as a result of various experiments, the inventors have found that it is important to efficiently raise the material to be dried in the vertical direction, that is, to increase the winding force. 210, 31 and 310), the clearance between the upper and lower sides was determined. Considering that the initial moisture content of the material to be dried and the moisture content decreases and the initial centrifugal force and repulsive force gradually decrease, and if the clearance between the upper and lower sides is appropriately set, the rotating hoisting blade The material to be dried could be raised to a height of about 3 to 4 times the diameter of (21, 210, 31, 310).

しかしながら、乾燥物を縦方向に上昇させる巻き上げ作用だけを考慮して、乾燥槽内壁(12)に被乾燥物を薄膜状に押し付ける押し付け作用を考慮しなければ、次のような問題が生じることも判明した。すなわち、被乾燥物を縦方向に高く上昇させることができたとしても、被乾燥物が各段ごとに乾燥槽内壁(12)に対して均一に薄膜状にならなかったり、また被乾燥物が乾燥途中でダンゴ状になり薄膜状にならなくなったり、さらに被乾燥物の乾燥が進んで水分がなくなると、被乾燥物が乾燥槽内壁(12)に沿って下方に下がり、乾燥槽内壁(12)に有効に接触しなくなり、乾燥効率が1/2〜1/3まで低下するという事実が判明した。   However, the following problems may occur if only the hoisting action for raising the dry matter in the vertical direction is taken into consideration and the pressing action for pressing the dry matter against the inner wall (12) of the drying tank is not considered. found. That is, even if the object to be dried can be raised in the vertical direction, the object to be dried does not form a thin film uniformly on the inner wall (12) of the drying tank for each stage. When drying becomes dango-like and does not become a thin film in the middle of drying, or further drying of the object to be dried proceeds, the object to be dried falls downward along the inner wall (12) of the drying tank, and the inner wall of the drying tank (12 ) Was not effectively contacted and the drying efficiency was reduced to 1/2 to 1/3.

以上のような実証を踏まえて発明者らは鋭意検討した結果、最適な押し付け作用と巻き上げ作用を両立させるためには、各段の回転巻上羽根(21,210,31,310)における上下間のクリアランスを最適な値に設定することが重要であり、前記[6]に記載したように、回転巻上羽根(21,210,31,310)の直径の0〜15%となる比率であることを今回明らかにした。かかる比率の範囲内であれば、最下段の回転巻上羽根(21,31)から最上段の回転巻上羽根(210,310)に亘り、各段ごとに被乾燥物を均一な薄膜状に乾燥槽内壁(12)に押し付け、しかも、最適な時間を経て順次上昇させることが可能となる。   As a result of intensive investigations based on the above demonstration, the inventors have found that in order to achieve both an optimal pressing action and a hoisting action, the upper and lower spaces in the rotating hoist blades (21, 210, 31, 310) of each stage It is important to set the clearance to an optimum value, and as described in [6] above, the ratio is 0 to 15% of the diameter of the rotary hoist blade (21, 210, 31, 310). I made it clear this time. Within this range, the material to be dried is formed into a uniform thin film for each stage from the lowermost rotary hoist blades (21, 31) to the uppermost rotary hoist blades (210, 310). It is possible to press against the inner wall (12) of the drying tank and raise it sequentially after an optimal time.

仮に前記クリアランスが、被乾燥物の種類に応じた最適値よりも小さいと、被乾燥物は上昇しやすくなり過ぎて、乾燥槽内壁(12)に対して均一な薄膜状に押し付けられる間もなく、各段ごとに被乾燥物の大半が直ぐに巻き上げられてしまう。逆に前記クリアランスが大き過ぎると、各段ごとに上方へと被乾燥物がうまく受け渡されず、上昇が途中で止まってしまう。また、前記クリアランスが中途半端な値であると、やはり乾燥槽(11,11A,11B)全体を有効に活用することができない。   If the clearance is smaller than the optimum value according to the type of the object to be dried, the object to be dried is likely to rise too much, and soon after being pressed against the inner wall (12) of the drying tank, Most of the material to be dried is immediately rolled up for each stage. On the other hand, if the clearance is too large, the material to be dried is not successfully delivered upward at each stage, and the rise stops midway. If the clearance is a halfway value, the entire drying tank (11, 11A, 11B) cannot be used effectively.

また、前記[7]に記載の乾燥装置(10)によれば、最上段の回転巻上羽根(210)より上方に向かう薄膜状の被乾燥物は、乾燥槽(11)内壁(12)に設けられた受止板(30)によって受け止められるので、そのまま上昇することなく回転巻上羽根(210)の内側より下方へ落下する。これにより、被乾燥物は再び最下段の回転巻上羽根(21)より乾燥工程が繰り返されるため、よりいっそう乾燥効率を高めることができる。   Moreover, according to the drying apparatus (10) as described in said [7], the to-be-dried object of the thin film which goes upwards from the uppermost rotary winding upper blade (210) is attached to an inner wall (12) of a drying tank (11). Since it is received by the provided receiving plate (30), it falls downward from the inside of the rotary hoist blade (210) without rising as it is. Thereby, since a drying process is repeated again from the lowermost rotary winding upper blade (21), the drying efficiency can be further improved.

本発明に係る乾燥装置によれば、乾燥槽内壁の伝熱面の加熱に加えて乾燥槽内に熱風を導入することにより、回転巻上羽根が多段であるか否かを問わず、よりいっそう乾燥効率を格段に高めることができる。   According to the drying apparatus according to the present invention, by introducing hot air into the drying tank in addition to the heating of the heat transfer surface of the inner wall of the drying tank, whether or not the rotary hoist blades are multistage, even more Drying efficiency can be greatly increased.

また、回転巻上羽根を上下に並ぶ複数段にした場合に、各段間における基羽根の相対的な配置を工夫することにより、各段間において被乾燥物を円滑に順次上昇させることができ、縦型の利点を生かした非常に高い乾燥効率を確実に実現することができる。   In addition, when the rotating upper and lower blades are arranged in a plurality of stages, the to-be-dried object can be raised smoothly and sequentially between the stages by devising the relative arrangement of the base blades between the stages. Therefore, it is possible to reliably achieve a very high drying efficiency by taking advantage of the vertical type.

さらに、種々様々な被乾燥物に応じて各段の間隔(クリアランス)を定める際、常に最適な寸法を容易に導くことが可能となり、縦型の利点を生かした非常に高い乾燥効率を確実に実現することができる。   In addition, when determining the interval (clearance) of each step according to a variety of materials to be dried, it is always possible to easily derive the optimum dimensions, ensuring a very high drying efficiency taking advantage of the vertical type. Can be realized.

本発明の第1実施の形態に係る乾燥装置の内部構造を示す縦断面図である。It is a longitudinal cross-sectional view which shows the internal structure of the drying apparatus which concerns on 1st Embodiment of this invention. 本発明の第1実施の形態に係る乾燥装置が備える最下段の回転巻上羽根を示す平面図である。It is a top view which shows the lowermost rotary winding upper blade | wing provided with the drying apparatus which concerns on 1st Embodiment of this invention. 本発明の第1実施の形態に係る乾燥装置が備える最下段の回転巻上羽根を示す側面図である。It is a side view which shows the lowermost rotary winding upper blade | wing with which the drying apparatus which concerns on 1st Embodiment of this invention is provided. 図2のIV−IV線断面図である。It is the IV-IV sectional view taken on the line of FIG. 本発明の第1実施の形態に係る乾燥装置が備える最下段以外の他の段の回転巻上羽根を構成する基羽根を示す平面図である。It is a top view which shows the base blade | wing which comprises the rotary winding upper blade | wing of other steps other than the lowest step with which the drying apparatus which concerns on 1st Embodiment of this invention is equipped. 本発明の第1実施の形態に係る乾燥装置が備える最下段以外の他の段の回転巻上羽根を構成する基羽根を示す側面図である。It is a side view which shows the base blade | wing which comprises the rotary winding upper blade | wing of other steps other than the lowest step with which the drying apparatus which concerns on 1st Embodiment of this invention is equipped. 本発明の第1実施の形態に係る乾燥装置を示す部分断面斜視図である。It is a partial section perspective view showing the drying device concerning a 1st embodiment of the present invention. 本発明の第1実施の形態に係る乾燥装置が備える各段ごとの回転巻上羽根を構成する基羽根の配置の一部を示す展開図である。It is an expanded view which shows a part of arrangement | positioning of the base blade | wing which comprises the rotary winding upper blade | wing for every stage with which the drying apparatus which concerns on 1st Embodiment of this invention is provided. 本発明の第1実施の形態に係る乾燥装置の使用時の作用を示す説明図である。It is explanatory drawing which shows the effect | action at the time of use of the drying apparatus which concerns on 1st Embodiment of this invention. 本発明の第1実施の形態に係る乾燥装置の使用時の被乾燥物の様子を示す説明図である。It is explanatory drawing which shows the mode of the to-be-dried object at the time of use of the drying apparatus which concerns on 1st Embodiment of this invention. 本発明の第2実施の形態に係る乾燥装置の内部構造を示す縦断面図である。It is a longitudinal cross-sectional view which shows the internal structure of the drying apparatus which concerns on 2nd Embodiment of this invention. 本発明の第3実施の形態に係る乾燥装置の内部構造を示す縦断面図である。It is a longitudinal cross-sectional view which shows the internal structure of the drying apparatus which concerns on 3rd Embodiment of this invention. 本発明の第3実施の形態に係る乾燥装置が備える最下段の回転巻上羽根を示す平面図である。It is a top view which shows the lowermost rotary winding upper blade | wing provided with the drying apparatus which concerns on 3rd Embodiment of this invention. 本発明の第3実施の形態に係る乾燥装置が備える最下段の回転巻上羽根を示す側面図である。It is a side view which shows the lowermost rotary winding upper blade | wing provided with the drying apparatus which concerns on 3rd Embodiment of this invention. 本発明の第3実施の形態に係る乾燥装置が備える最下段以外の他の段の回転巻上羽根を構成する基羽根を示す平面図である。It is a top view which shows the base blade | wing which comprises the rotary winding upper blade | wing of other steps other than the lowest step with which the drying apparatus which concerns on 3rd Embodiment of this invention is equipped. 本発明の第3実施の形態に係る乾燥装置が備える最下段以外の他の段の回転巻上羽根を構成する基羽根を示す側面図である。It is a side view which shows the base blade | wing which comprises the rotary winding upper blade | wing of other steps other than the lowest step with which the drying apparatus which concerns on 3rd Embodiment of this invention is equipped. 本発明の第3実施の形態に係る乾燥装置を示す部分断面斜視図である。It is a fragmentary sectional perspective view which shows the drying apparatus which concerns on 3rd Embodiment of this invention. 本発明の第3実施の形態に係る乾燥装置が備える各段ごとの回転巻上羽根を構成する基羽根の配置の一部を示す展開図である。It is an expanded view which shows a part of arrangement | positioning of the base blade | wing which comprises the rotary winding upper blade | wing for every stage with which the drying apparatus which concerns on 3rd Embodiment of this invention is provided.

以下、図面に基づき、本発明を代表する各種実施の形態を説明する。
図1〜図10は、本発明の第1実施の形態を示している。
図1に示すように、乾燥装置10の主要部を成す乾燥槽11は、縦型の円筒形状に構成されている。この乾燥槽11の内部に投入する被乾燥物は、生ゴミ、残飯、食品残滓、汚泥、スラッジ、家畜糞尿等と多岐に渡り、その形態も、粒状、粉末状、液状、塊状等、種々様々で、水分含量も多様である。本乾燥装置10は、何れの種類の被乾燥物にも対応可能である。
Hereinafter, various embodiments representing the present invention will be described with reference to the drawings.
1 to 10 show a first embodiment of the present invention.
As shown in FIG. 1, the drying tank 11 which comprises the principal part of the drying apparatus 10 is comprised by the vertical cylindrical shape. The objects to be dried to be put into the drying tank 11 range from raw garbage, leftover food, food residue, sludge, sludge, livestock excrement, etc., and various forms such as granular, powder, liquid, and lump. And the water content is also diverse. The present drying apparatus 10 can handle any type of object to be dried.

乾燥槽11の円筒状の内壁は、加熱手段からの熱を被乾燥物に伝える伝熱面12となっている。加熱手段としては、例えば、乾燥槽11の外周を囲むように形成したジャケット13と、このジャケット13に連結され、ジャケット13内に蒸気を送り込むボイラー(図示省略)とを備えて成る。ジャケット13には、蒸気をジャケット13内に導く蒸気流入部13aと、蒸気をジャケット13外に排出する蒸気排出部13bが設けられている。   The cylindrical inner wall of the drying tank 11 serves as a heat transfer surface 12 that transfers heat from the heating means to the object to be dried. As the heating means, for example, a jacket 13 formed so as to surround the outer periphery of the drying tank 11 and a boiler (not shown) connected to the jacket 13 and sending steam into the jacket 13 are provided. The jacket 13 is provided with a steam inflow portion 13 a that guides the steam into the jacket 13 and a steam discharge portion 13 b that discharges the steam out of the jacket 13.

前記加熱手段の他の例として、蒸気の代わりに熱風をジャケット13内に送り込むように構成したり、あるいは、ジャケット13内に収容した熱媒体と、ジャケット13の外周に配設した電気ヒーターとから構成しても良い。すなわち、電気ヒーターからの熱を熱媒体を介して伝熱面12に伝えるものである。さらに構成を簡略化して、ジャケット13の外周に配設した電気ヒーターの熱を伝熱面12に直接伝えるようにしても良い。このように前記加熱手段には種々の種類が考えられる。   As another example of the heating means, it is configured to send hot air instead of steam into the jacket 13, or from a heat medium accommodated in the jacket 13 and an electric heater disposed on the outer periphery of the jacket 13. It may be configured. That is, the heat from the electric heater is transmitted to the heat transfer surface 12 through the heat medium. Further, the configuration may be simplified so that the heat of the electric heater disposed on the outer periphery of the jacket 13 is directly transmitted to the heat transfer surface 12. As described above, various types of heating means can be considered.

ただし、前記ジャケット13等を含めた加熱手段は、必須の構成ではなく乾燥槽11から省いて構成してもかまわない。あるいはジャケット13を備えた乾燥槽11であっても、伝熱面12を敢えて加熱しないように使用することも想定している。なお、以下に説明する各実施の形態では、ジャケット13等を含めた加熱手段を備える場合を例として説明する。   However, the heating means including the jacket 13 and the like may be omitted from the drying tank 11 instead of an essential configuration. Or even if it is the drying tank 11 provided with the jacket 13, it is assumed that the heat-transfer surface 12 is used so that it may not be heated. In each embodiment described below, a case where a heating unit including a jacket 13 and the like is provided will be described as an example.

乾燥槽11の内部に被乾燥物を供給したり外部に排出する構成も様々であり、例えば、乾燥槽11の上蓋14の一部に開閉可能な供給口(図示省略)を設けて、この供給口より被乾燥物を内部に投入すると良い。一方、伝熱面12の底板15付近に開閉可能な排出口(図示省略)を設けて、この排出口より乾燥済みの被乾燥物を外部に排出すると良い。かかる構成によれば、全ての工程が終了するまで、途中で被乾燥物の供給ないし排出を行わないバッチ式の処理を行うものとなる。   There are various configurations for supplying the material to be dried to the inside of the drying tank 11 and discharging it to the outside. For example, a supply port (not shown) that can be opened and closed is provided in a part of the upper lid 14 of the drying tank 11 and this supply It is better to put the material to be dried through the mouth. On the other hand, a discharge port (not shown) that can be opened and closed is provided near the bottom plate 15 of the heat transfer surface 12, and the dried material to be dried may be discharged to the outside through this discharge port. According to such a configuration, batch-type processing is performed in which supply or discharge of an object to be dried is not performed halfway until all steps are completed.

あるいは、図11に示した、後述する第2実施の形態に係る乾燥装置10Aのように、乾燥槽11の底板15付近に供給管16を接続して、被乾燥物を供給スクリュー16aにより乾燥槽11内の底部に供給しても良い。一方、伝熱面12の上蓋14付近に排出管17を接続して、乾燥済みの被乾燥物を排出スクリュー17aによって外部に排出する。かかる構成によれば、連続的に被乾燥物を供給しながら後述する乾燥工程を実行し、乾燥済みの被乾燥物を連続的に排出する連続式の処理も可能となる。   Alternatively, like a drying apparatus 10A according to a second embodiment to be described later shown in FIG. 11, a supply pipe 16 is connected to the vicinity of the bottom plate 15 of the drying tank 11, and an object to be dried is dried by a supply screw 16a. You may supply to the bottom part in 11. FIG. On the other hand, a discharge pipe 17 is connected in the vicinity of the upper lid 14 of the heat transfer surface 12, and the dried material to be dried is discharged to the outside by a discharge screw 17a. According to such a configuration, it is possible to perform a continuous process in which a drying process to be described later is performed while continuously supplying the objects to be dried, and the dried objects to be dried are continuously discharged.

乾燥槽11内の中心部には、縦方向(鉛直方向)に延びる回転軸20が配設されている。この回転軸20は、乾燥槽11の上蓋14と底板15の中心を通るように軸支されている。回転軸20の途中には、回転巻上羽根21,210が上下に並んで複数段となるように取り付けられている。回転軸20の上端部は、乾燥槽11の上蓋14の上方に配設された電動モータ18に動力伝達可能に連結されており、電動モータ18の駆動により回転軸20は回転駆動し、複数段の回転巻上羽根21,210は同期して回転する。なお、回転軸20の下端部は、乾燥槽11の底板15の外側に突出しており、その周囲には後述する熱風導入部19が設けられている。   A rotating shaft 20 extending in the vertical direction (vertical direction) is disposed at the center of the drying tank 11. The rotary shaft 20 is pivotally supported so as to pass through the centers of the upper lid 14 and the bottom plate 15 of the drying tank 11. In the middle of the rotary shaft 20, rotary winding upper blades 21, 210 are attached so as to form a plurality of stages side by side. The upper end portion of the rotary shaft 20 is connected to an electric motor 18 disposed above the upper lid 14 of the drying tank 11 so as to be able to transmit power. The rotating upper and lower blades 21 and 210 rotate synchronously. In addition, the lower end part of the rotating shaft 20 protrudes the outer side of the bottom plate 15 of the drying tank 11, and the hot air introduction part 19 mentioned later is provided in the circumference | surroundings.

前記回転巻上羽根21,210は、それぞれ回転軸20を中心に円周方向に並ぶように配された複数の基羽根22,220から成り、本実施の形態では何れも3枚の基羽根22,220を備えて成る。複数段の回転巻上羽根21,210のうち、最下段の回転巻上羽根21と、他の段の回転巻上羽根210とでは、それぞれ基羽根22,220の長さが異なる。すなわち、最下段の回転巻上羽根21の基羽根22は、他の段の回転巻上羽根210の基羽根220よりも長く形成されている。以下、主に回転巻上羽根21を代表して、その構成を詳しく説明する。   The rotary hoist blades 21, 210 are each composed of a plurality of base blades 22, 220 arranged in a circumferential direction around the rotation shaft 20, and in this embodiment, all three base blades 22 are arranged. , 220. Of the plurality of stages of rotary winding upper blades 21 and 210, the lowermost rotary winding upper blade 21 and the other stage rotary winding upper blade 210 have different lengths of the base blades 22 and 220, respectively. That is, the base blade 22 of the lowermost rotary winding upper blade 21 is formed longer than the base blade 220 of the other stage rotary winding upper blade 210. Hereinafter, the structure will be described in detail mainly on behalf of the rotary winding upper blade 21.

図2〜図4に示すように、最下段の回転巻上羽根21を構成する各基羽根22は、それぞれ同一形状であり、平面視でそれぞれが円周方向に延び、被乾燥物を一端部22aから載せて他端部22bに移動させつつ巻き上げ可能な平坦面23を有している。この平坦面23は、回転方向Rと逆方向に向かって、一端部22aから他端部22bにかけて斜め上方に延びるように形成されている。すなわち、各基羽根22は、被乾燥物を平坦面23上に載せて巻き上げつつ、遠心力(図10参照)によって前記伝熱面12に押し付けるように構成されている。   As shown in FIGS. 2 to 4, the base blades 22 constituting the lowermost rotary winding upper blade 21 have the same shape, and each extend in the circumferential direction in plan view, and the object to be dried is disposed at one end. It has a flat surface 23 that can be rolled up while being moved from 22a to the other end 22b. The flat surface 23 is formed to extend obliquely upward from one end 22a to the other end 22b in the direction opposite to the rotation direction R. That is, each base blade 22 is configured to press against the heat transfer surface 12 by centrifugal force (see FIG. 10) while winding an object to be dried on the flat surface 23.

より詳しくは、各基羽根22の平坦面23は、平面視で360度の円周範囲内の長さで一定幅に延び、前記平坦面23の外周端は、前記伝熱面12の円筒形状に沿った弧状に形成されている。この平坦面23の外周端と前記伝熱面12との間には、各基羽根22の回転を許容するクリアランスU(図10参照)が形成されている。なお、クリアランスUは、基羽根22の一端部22aから他端部22bにかけて一定である必要はなく、例えば、基羽根22の回転方向Rと逆方向に向かって次第に広くなるように設定しても良い。   More specifically, the flat surface 23 of each base blade 22 extends in a constant width with a length within a circumferential range of 360 degrees in plan view, and the outer peripheral end of the flat surface 23 is a cylindrical shape of the heat transfer surface 12. It is formed in an arc shape along. Between the outer peripheral end of the flat surface 23 and the heat transfer surface 12, a clearance U (see FIG. 10) that allows the rotation of each base blade 22 is formed. The clearance U does not need to be constant from the one end 22a to the other end 22b of the base blade 22; for example, the clearance U may be set so as to gradually increase in the direction opposite to the rotation direction R of the base blade 22. good.

また、最下段の回転巻上羽根21に限っては、それぞれ基羽根22の他端部22bが、回転方向Rと逆方向に隣り合う他の基羽根22の一端部22aよりも高く位置し平面視で重なるように構成されている。すなわち、各基羽根22の長さは、平面視で360度を略3等分した略120度の角度範囲に渡る長さとなる。一方、最下段以外の他の段の回転巻上羽根210における各基羽根220の構成は、基本的には前記各基羽根22と共通するが、基羽根220の長さは、前記基羽根22の長さよりも短く設定されている。   Further, in the case of the lowermost rotary hoist blade 21, the other end 22b of the base blade 22 is positioned higher than the one end 22a of the other base blade 22 adjacent to the rotation direction R in the opposite direction. It is configured to overlap with each other. That is, the length of each base blade 22 is a length over an angle range of approximately 120 degrees obtained by dividing 360 degrees into approximately three equal parts in plan view. On the other hand, the configuration of each base blade 220 in the rotary hoist blades 210 other than the lowest stage is basically the same as that of each base blade 22, but the length of the base blade 220 is the same as that of the base blade 22. It is set shorter than the length.

他の段の回転巻上羽根210に関して、各基羽根220の平坦面230は、平面視で360度の円周範囲内の長さで細幅形状に延び、かつ平面視で同一円周上に並ぶ隣り合う基羽根220同士の平坦面230が一端部220aから他端部220bにかけて円周方向に互いに重ならない長さに設定されている。本実施の形態では、何れの基羽根220も、平面視で略60度の角度範囲に渡る長さであり、前記基羽根22の長さの2/3程度である。なお、前記基羽根22,220の数は、前述したように3枚に限られるものではなく、2枚あるいは4枚以上で構成しても良い。各基羽根22,220の具体的な長さや横幅の寸法も、適宜定め得る設計事項である。   With respect to the rotary hoist blades 210 of the other stages, the flat surface 230 of each base blade 220 extends in a narrow shape with a length within a circumferential range of 360 degrees in plan view, and is on the same circumference in plan view. The flat surfaces 230 between the adjacent base blades 220 are set to a length that does not overlap each other in the circumferential direction from the one end 220a to the other end 220b. In the present embodiment, any of the base blades 220 has a length over an angle range of about 60 degrees in plan view, and is about 2/3 of the length of the base blade 22. The number of the base blades 22 and 220 is not limited to three as described above, and may be two or four or more. Specific lengths and width dimensions of the base blades 22 and 220 are also design matters that can be appropriately determined.

また、図2に示すように、最下段の回転巻上羽根21の各基羽根22は、前記回転軸20に放射状に固定された取付アーム24の先端に一端部22aが連結されている。ここで取付アーム24は、各基羽根22の数に合わせて3本設けられており、それぞれ前記回転軸20の軸方向と直交する平面上に展開するように配され、それぞれが対応する前記基羽根22を支持している。   Further, as shown in FIG. 2, each base blade 22 of the lowermost rotary winding upper blade 21 has one end 22 a connected to the tip of a mounting arm 24 that is radially fixed to the rotary shaft 20. Here, three mounting arms 24 are provided in accordance with the number of the respective base blades 22, and are arranged so as to expand on a plane orthogonal to the axial direction of the rotary shaft 20, respectively. The blades 22 are supported.

本実施の形態では、基羽根22と取付アーム24とは一体成形されたものであり、一枚の金属板を裁断して曲げ加工することにより構成されている。すなわち、取付アーム24は、基羽根22と同様に一定幅に延びた板状であり、前記回転軸20より半径方向に直線状に延びる部材である。この取付アーム24の先端側に、基羽根22の一端部22aが一体的に連続している。   In the present embodiment, the base blade 22 and the mounting arm 24 are integrally formed, and are configured by cutting and bending a single metal plate. That is, the mounting arm 24 is a plate that extends in a certain width like the base blade 22, and is a member that extends linearly in the radial direction from the rotary shaft 20. One end 22 a of the base blade 22 is integrally continuous with the distal end side of the mounting arm 24.

より詳しくは、取付アーム24は、その幅方向において前記基羽根22の平坦面23の傾斜に合わせて斜めに傾くように曲げられており、図4に示すように、乾燥槽11の底板15に対して所定角度で傾斜している。これにより、取付アーム24は、底板15上に溜まる被乾燥物を積極的に掻き取る作用を果たす。また、取付アーム24において、回転方向Rに向いている側縁24aはテーパー縁として形成され、前記底板15に対向するように配されている。   More specifically, the mounting arm 24 is bent so as to be inclined in accordance with the inclination of the flat surface 23 of the base blade 22 in the width direction, and is attached to the bottom plate 15 of the drying tank 11 as shown in FIG. It is inclined at a predetermined angle. As a result, the mounting arm 24 functions to positively scrape the material to be dried that accumulates on the bottom plate 15. Further, in the mounting arm 24, a side edge 24 a facing in the rotation direction R is formed as a tapered edge and is disposed so as to face the bottom plate 15.

また、図5、図6に示すように、最下段以外の他の段の回転巻上羽根210の各基羽根220は、小円板部240aの外周から放射状に延びた取付アーム240の先端に連結されている。小円板部240aには、前記回転軸20が通され、回転軸20に固定するための円形貫通孔が形成されている。取付アーム240は、前記取付アーム24の場合と同様に、各基羽根220の数に合わせて3本設けられており、それぞれ前記回転軸20の軸方向と直交する平面上に展開するように配され、それぞれの先端が前記基羽根220の一端部220aに一体に連結している。   Further, as shown in FIGS. 5 and 6, each base blade 220 of the rotary hoist blade 210 other than the lowest step is attached to the tip of the mounting arm 240 that extends radially from the outer periphery of the small disk portion 240a. It is connected. The small disc portion 240 a is formed with a circular through hole through which the rotating shaft 20 is passed and fixed to the rotating shaft 20. As in the case of the mounting arm 24, three mounting arms 240 are provided in accordance with the number of the base blades 220, and each mounting arm 240 is arranged to expand on a plane orthogonal to the axial direction of the rotary shaft 20. Each tip is integrally connected to one end 220 a of the base blade 220.

ここで取付アーム240も、前記基羽根220と一体成形されたものであり、一枚の金属板を裁断して曲げ加工することにより構成されている。ただし、前記取付アーム24とは異なり、図6に示すように、特に幅方向における傾斜は設けられていない。すなわち、取付アーム240は、それぞれ前記回転軸20の軸方向と直交する平面上に全て平行に沿うように配されている。よって、最下段以外の他の段の回転巻上羽根210における取付アーム240は、特に被乾燥物を積極的に掻き取る作用を果たすものではない。   Here, the mounting arm 240 is also integrally formed with the base blade 220, and is configured by cutting and bending a single metal plate. However, unlike the mounting arm 24, as shown in FIG. 6, there is no particular inclination in the width direction. That is, the mounting arms 240 are all arranged in parallel on a plane perpendicular to the axial direction of the rotary shaft 20. Therefore, the mounting arm 240 in the rotary hoist blades 210 in stages other than the lowest stage does not particularly act to positively scrape off the material to be dried.

また、図示省略したが、前記各基羽根22,220の他端部22b,220bに関しても、前記回転軸20に放射状に固定された支持アームの先端に連結すると良い。ここで支持アームは、特に前記取付アーム24のような掻き取る作用を果たす必要はなく、単に支持して補強できる構造であれば何でも良いが、被乾燥物の巻き上げ作用に干渉しないように、細棒等のようになるべく小さく構成すると良い。   Although not shown, the other end portions 22b and 220b of the base blades 22 and 220 may be connected to the distal ends of support arms that are radially fixed to the rotary shaft 20. Here, the support arm does not need to perform the scraping action like the mounting arm 24 in particular, and any structure that can be simply supported and reinforced can be used. However, the support arm is not required to interfere with the hoisting action of the object to be dried. It is better to make it as small as possible, such as a bar.

図1に示すように、複数段の回転巻上羽根21,210は、前述した最下段の回転巻上羽根21が回転軸20の下部に配設され、その上方に他の回転巻上羽根210が等間隔で4段に並ぶように配設され、多段構成とされている。本実施の形態では、回転巻上羽根210を4段に設けたが、この回転巻上羽根210は、乾燥槽11の高さや寸法に応じて、2段、3段、もしくは5段以上、あるいは1段だけとして配設することもできる。   As shown in FIG. 1, the multi-stage rotary hoist blades 21, 210 have the lowermost rotary hoist blade 21 arranged at the lower part of the rotary shaft 20, and the other rotary hoist vane 210 above it. Are arranged so as to be arranged in four stages at equal intervals, and a multi-stage configuration is adopted. In the present embodiment, the rotary hoist blades 210 are provided in four stages. However, the rotary hoist blades 210 are two, three, five or more, or depending on the height and dimensions of the drying tank 11, or It can also be arranged as a single stage.

このような回転巻上羽根21,210は、前記回転軸20の回転に伴って被乾燥物を、各基羽根22,220の平坦面23,230上に載せて一端部22a,220aから他端部22b,220bへと巻き上げつつ、遠心力により前記伝熱面12に薄膜状に押し付け、かつ該伝熱面12に沿って連続して上昇させることにより、乾燥工程が実行されるように構成されている。   The rotary hoist blades 21 and 210 are configured to place an object to be dried on the flat surfaces 23 and 230 of the base blades 22 and 220 with the rotation of the rotary shaft 20 and from the one end portions 22a and 220a to the other end. While being rolled up to the portions 22b and 220b, the drying process is performed by pressing the heat transfer surface 12 in a thin film shape by centrifugal force and continuously raising the heat transfer surface 12 along the heat transfer surface 12. ing.

このような乾燥工程においては、乾燥槽11内に外部から熱風を導入して、該熱風を被乾燥物の薄膜状の内周側(図10中の蒸発面E)に吹き付けることにより、該内周側より被乾燥物を加熱して水分蒸発を推進させるように構成されている。被乾燥物は伝熱面12に沿って薄膜状に拡がるが、被乾燥物が空気に接する内周側より熱風があたり積極的に加熱されるため、加熱効率を高めることができる。ここで熱風は、外部に設けられたボイラー等から供給されて乾燥槽11内に導入される。   In such a drying step, hot air is introduced into the drying tank 11 from the outside, and the hot air is blown onto the thin film-like inner peripheral side (evaporation surface E in FIG. 10) of the object to be dried. The object to be dried is heated from the circumferential side to promote moisture evaporation. Although the object to be dried spreads in a thin film shape along the heat transfer surface 12, since the object to be dried is heated positively from the inner peripheral side in contact with the air, the heating efficiency can be improved. Here, the hot air is supplied from a boiler or the like provided outside and introduced into the drying tank 11.

図1に示すように、乾燥槽11の底部には熱風導入部19が設けられている。熱風導入部19は、例えば図示したように回転軸20の下部を囲むように底板15の中心側に設けられている。かかる場合、底板15の中心側が一部開口するが、例えばその上方に回転軸20を中心として側方に拡がるカバーを設けることで、乾燥槽11内に投入された被乾燥物が開口より落下することを防止すると共に、乾燥槽11の底部にて熱風を中心側より側方に向かわせることができる。   As shown in FIG. 1, a hot air introduction part 19 is provided at the bottom of the drying tank 11. The hot air introduction part 19 is provided in the center side of the baseplate 15 so that the lower part of the rotating shaft 20 may be enclosed, for example as shown in figure. In such a case, a part of the center side of the bottom plate 15 is opened. For example, by providing a cover that extends laterally around the rotation shaft 20, an object to be dried dropped into the drying tank 11 falls from the opening. In addition to preventing this, hot air can be directed from the center side to the side at the bottom of the drying tank 11.

このように乾燥槽11の底部において中心側より側方に向けて吹き出された熱風は、回転巻上羽根21,210の回転より生じる気流と遠心力により渦巻き状になって上昇しつつ、被乾燥物の薄膜状の内周側に吹き付けられる。なお、前記カバーは図示省略したが、具体的には例えば回転軸20より円盤状に拡がり、その下方にて熱風導入部19が底板15に連通する開口を上から覆い得る直径に設定すると良い。   In this way, the hot air blown out from the center side to the side at the bottom of the drying tank 11 rises in a spiral shape due to the airflow and centrifugal force generated by the rotation of the rotating upper and lower blades 21 and 210, and is dried. It is sprayed on the inner peripheral side of the thin film. Although the illustration of the cover is omitted, specifically, for example, it is preferable to set the diameter so as to cover the opening through which the hot-air introduction portion 19 communicates with the bottom plate 15 from the top.

熱風導入部19は、前記ボイラー等に連通管(図示省略)を介して接続され、ボイラー等で生成された熱風は熱風導入部19を通じて乾燥槽11内に導入されるように構成される。かかる熱風導入部19は、何れの構成であるにせよ乾燥槽11の底部付近に設けて、熱風を中心側より側方に向けて吹き出すように構成すると良い。なお、熱風導入部19が連通する開口において、乾燥槽11内の被乾燥物が入り込まないようにするための様々な工夫は周知の設計事項であり、詳しい説明は省略する。   The hot air introduction unit 19 is connected to the boiler or the like via a communication pipe (not shown), and the hot air generated by the boiler or the like is introduced into the drying tank 11 through the hot air introduction unit 19. Whatever the configuration, the hot air introduction section 19 is preferably provided near the bottom of the drying tank 11 so that the hot air is blown out from the center side to the side. In addition, in the opening which the hot air introduction part 19 communicates, various devices for preventing the material to be dried in the drying tank 11 from entering are well-known design matters, and detailed description thereof is omitted.

別の熱風導入部の構成としては、他に例えば、乾燥槽11の側壁である伝熱面12の下端側より内部に熱風を導入するように構成しても良い。かかる構成の場合には、伝熱面12の下端側より回転方向に向けて開口し、回転巻上羽根21の回転より生じる気流と同一方向に熱風を吹き出すように開口すると良い。ここで開口を任意に開閉できるようにして風量を調整可能に構成すると良い。前記熱風導入部19においても同様に風量を調整可能に構成しても良い。このように熱風導入部の具体的な形状や配置は適宜定め得る設計事項であり、1つに限らず複数設けても良い。   As another configuration of the hot air introducing section, for example, hot air may be introduced into the inside from the lower end side of the heat transfer surface 12 which is the side wall of the drying tank 11. In the case of such a configuration, the heat transfer surface 12 may be opened from the lower end side in the rotational direction, and the hot air may be blown out in the same direction as the air flow generated by the rotation of the rotary winding upper blade 21. Here, it is preferable that the air volume can be adjusted by arbitrarily opening and closing the opening. Similarly, the hot air introduction section 19 may be configured so that the air volume can be adjusted. As described above, the specific shape and arrangement of the hot air introduction section are design matters that can be determined as appropriate, and the number of the hot air introduction sections is not limited to one and may be plural.

また、乾燥槽11には、乾燥工程で生じる廃ガスを外部に排出する廃ガス排出部(図示省略)が設けられている。廃ガス排出部は、上蓋14に設けても良く、あるいは伝熱面12の上端側に設けても良い。何れにせよ廃ガス排出部は乾燥槽11の上部に設けると良い。前記熱風導入部19から乾燥槽11内に導入された熱風は、乾燥工程で生じる廃ガスと共に廃ガス排出部から排出されることになる。ここで廃ガス排出部も、任意に開閉できるようにして排出量を調整可能に構成すると良い。   Further, the drying tank 11 is provided with a waste gas discharge unit (not shown) that discharges waste gas generated in the drying process to the outside. The waste gas discharge unit may be provided on the upper lid 14 or on the upper end side of the heat transfer surface 12. In any case, the waste gas discharge unit is preferably provided in the upper part of the drying tank 11. The hot air introduced from the hot air introduction unit 19 into the drying tank 11 is discharged from the waste gas discharge unit together with the waste gas generated in the drying process. Here, the waste gas discharge unit may be configured to be adjustable so that the discharge amount can be adjusted arbitrarily.

さらに、乾燥装置10には、前記廃ガス排出部から排出された廃ガスを導いて燃焼させ無害化する燃焼炉(図示省略)が併設されている。燃焼炉と前記廃ガス排出部とは、連通管(図示省略)を介して接続され、乾燥槽11で発生した廃ガス(外部から導入された熱風を含む)を燃焼炉へと送り込むことができるようになっている。燃焼炉は、廃ガスに含まれる有害物質を熱分解して無害化すると共に脱臭し、生じた熱風を無害な状態で放出するものである。なお、前記廃ガスは比較的多くのカロリ−を保有しているので、燃焼炉の燃料は比較的少量で済み、燃焼炉を低燃費燃焼炉とすることができる。   Further, the drying apparatus 10 is provided with a combustion furnace (not shown) that guides and burns the waste gas discharged from the waste gas discharge unit to render it harmless. The combustion furnace and the waste gas discharge unit are connected via a communication pipe (not shown), and waste gas (including hot air introduced from the outside) generated in the drying tank 11 can be sent to the combustion furnace. It is like that. The combustion furnace thermally decomposes and detoxifies harmful substances contained in the waste gas, and deodorizes them, and releases the generated hot air in a harmless state. Since the waste gas contains a relatively large amount of calories, a relatively small amount of fuel is required in the combustion furnace, and the combustion furnace can be a low fuel consumption combustion furnace.

この燃焼炉から生じた熱風を、前記ジャケット13内に送り込むように構成して、伝熱面12の加熱手段として利用しても良い。さらに、燃焼炉から生じた熱風を、加熱手段として利用すると共に、前記乾燥工程中の乾燥槽11内に導入するように構成しても良い。すなわち、燃焼炉から生じた熱風を導く熱風排出管を分岐させて、一方を前記蒸気流入部13aに接続すると共に、他方を前記熱風導入部19に接続して、それぞれに熱風を供給できるようにする。   The hot air generated from this combustion furnace may be sent into the jacket 13 and used as a heating means for the heat transfer surface 12. Furthermore, you may comprise so that the hot air produced from the combustion furnace may be utilized as a heating means and introduced into the drying tank 11 during the drying step. That is, the hot air discharge pipe for guiding the hot air generated from the combustion furnace is branched, and one is connected to the steam inflow portion 13a and the other is connected to the hot air introducing portion 19 so that hot air can be supplied to each. To do.

前記乾燥工程において、乾燥槽11内に外部から熱風を導入するが、これに加えて、前記伝熱面12を加熱しても良い。このように、乾燥槽11内への熱風の導入と伝熱面12の加熱を同時に行う場合には、前記伝熱面12で加熱されて含水率の低くなった被乾燥物が薄膜状の内周側の蒸発面E(図10参照)に移動しつつ水分蒸発が推進される過程で、乾燥槽11内に外部から熱風を導入して蒸発面Eに吹き付けることにより、蒸発面Eにおける水分蒸発が促進されるようになっている。   In the drying step, hot air is introduced into the drying tank 11 from the outside. In addition, the heat transfer surface 12 may be heated. As described above, when the introduction of hot air into the drying tank 11 and the heating of the heat transfer surface 12 are performed at the same time, the object to be dried which has been heated at the heat transfer surface 12 and has a low water content is formed into a thin film. Moisture evaporation on the evaporation surface E is performed by introducing hot air from the outside into the drying tank 11 and blowing it on the evaporation surface E in the process in which moisture evaporation is promoted while moving to the evaporation surface E on the circumferential side (see FIG. 10). Has been promoted.

また、前記回転巻上羽根21,210を2段以上設けた場合に重要となるのは、各段間における基羽根22,220の相対的な配置である。かかる配置については、発明者らの鋭意検討の結果、次のような特別な配置に設定することによって、非常に高い乾燥効率を実現することができる。すなわち、図7に示すように、複数段の回転巻上羽根21,210は、前記回転軸20に沿って並ぶ上下間において、それぞれの各基羽根22,220が平面視で所定角度ずつ位相がずれ、回転方向Rと逆方向に延びる多重螺旋階段状に並ぶように配設されている。   In addition, what is important when two or more stages of the rotary hoist blades 21 and 210 are provided is the relative arrangement of the base blades 22 and 220 between the respective stages. About such arrangement | positioning, very high drying efficiency is realizable by setting to the following special arrangement | positioning as a result of inventors' earnest examination. That is, as shown in FIG. 7, the plurality of rotary hoist blades 21, 210 are phased by a predetermined angle in the plan view when the base blades 22, 220 are arranged along the rotary shaft 20. They are arranged so as to be aligned in a multiple spiral staircase extending in the direction opposite to the rotational direction R.

より詳しくは、図8に示すように、最下段の回転巻上羽根21の基羽根22と、その一段上、すなわち下から2段目の回転巻上羽根210の基羽根220との位相は、下方の基羽根22の他端部22bに対して、回転方向と逆方向の間近に位置する上方の基羽根220の一端部220aが、平面視で重ならずに前記逆方向に離隔し、下方の基羽根22の他端部22bにおける平坦面23を延長した傾斜面より下方に位置するように設定されている。   More specifically, as shown in FIG. 8, the phase between the base blade 22 of the lowermost rotary winding upper blade 21 and the base blade 220 of the second stage of the rotary winding upper blade 210 from the lower stage, One end 220a of the upper base blade 220 located in the vicinity of the opposite direction to the rotation direction with respect to the other end portion 22b of the lower base blade 22 is separated in the reverse direction without overlapping in a plan view. The other end 22b of the base blade 22 is set to be positioned below the inclined surface obtained by extending the flat surface 23.

さらに、2段目以降の回転巻上羽根210は、それぞれ基羽根220が同一形状であり、上下に並ぶ各基羽根220は前記同様に、下方の基羽根220の他端部220bに対して、回転方向Rと逆方向の間近に位置する上方の基羽根220の一端部220aが、平面視で重ならずに前記逆方向に所定角度(図9中の距離B)分だけ離隔し、下方の基羽根220の他端部220bにおける平坦面230を延長した傾斜面より下方に位置するように設定されている。   Further, in the second and subsequent rotating upper and lower blades 210, the base blades 220 have the same shape, and the base blades 220 arranged in the vertical direction are similar to the other end portion 220b of the lower base blade 220 in the same manner as described above. One end 220a of the upper base blade 220 located close to the direction opposite to the rotation direction R is separated by a predetermined angle (distance B in FIG. 9) in the opposite direction without overlapping in plan view, The other end 220b of the base blade 220 is set so as to be positioned below the inclined surface obtained by extending the flat surface 230.

このような配置により、図9に示すように、前述した上下間のクリアランスFにおいて、下の段の基羽根220で巻き上げられて斜め上方に移動する被乾燥物が、上の段の回転している基羽根220の下面で押さえられることがなく、上の段の基羽根220の一端部220aにタイミング良くすくい上げられるようにして、被乾燥物は各基羽根22,220の多重螺旋階段を上るように順次移動する。また、2段目以降の回転巻上羽根210の回転により、被乾燥物に上昇力と遠心力を補充することができるようになっている。   With such an arrangement, as shown in FIG. 9, in the above-described clearance F between the upper and lower sides, an object to be dried that is wound up by the lower base blade 220 and moves obliquely upward is rotated in the upper stage. So that the object to be dried can be scooped up at one end 220a of the upper base blade 220 in a timely manner so that the material to be dried goes up the multiple spiral steps of the base blades 22 and 220. Move sequentially. Further, ascending force and centrifugal force can be supplemented to the object to be dried by the rotation of the rotary upper and lower blades 210 in the second and subsequent stages.

さらにまた、前記各段間における特別な配置と並んで重要となるのが、各段の上下間におけるクリアランスFである。このクリアランスFについても、発明者らの鋭意検討の結果、回転巻上羽根21,210の各基羽根22,220の他端部22b,220b最上端からその一段上の回転巻上羽根210の各基羽根220の一端部220a最下端までの寸法が、各基羽根22,220の平坦面23,230の最外周端を結ぶ円直径(以下、単に直径とする)の0〜15%となる比率に定められている。さらには、0〜9%となる比率に定めれば、よりいっそう優良な効果を期待することができることも確かめられている。   Further, the clearance F between the upper and lower sides of each stage is important along with the special arrangement between the stages. As for the clearance F, as a result of diligent investigations by the inventors, each of the rotary hoisting blades 210 that are one step above the uppermost end of the other end portions 22b and 220b of the base vanes 22 and 220 of the rotary hoisting blades 21 and 210 is obtained. Ratio in which the dimension to the lowermost end of the one end 220a of the base blade 220 is 0 to 15% of a circular diameter (hereinafter simply referred to as a diameter) connecting the outermost peripheral ends of the flat surfaces 23 and 230 of the base blades 22 and 220. It is stipulated in. Furthermore, it has been confirmed that if the ratio is set to 0 to 9%, an even better effect can be expected.

ここで各段の上下間におけるクリアランスFは、前記各基羽根22,220の直径の0〜15%となる比率の範囲内であれば、一律に同じ値である必要はない。例えば、図1に示したように、最下段の回転巻上羽根21とその直ぐ上の2段目の回転巻上羽根210との間のクリアランスFを、2段目よりも上方の各回転巻上羽根210間のクリアランスFより小さく設定しても良い。なお、最下段の基羽根22の直径と,それ以外の基羽根220の直径とは、前記伝熱面12との間のクリアランスU(図10参照)を考慮して同一である。   Here, the clearance F between the upper and lower sides of each stage need not be the same value as long as it is within the range of the ratio of 0 to 15% of the diameter of each base blade 22, 220. For example, as shown in FIG. 1, the clearance F between the lowermost rotary winding upper blade 21 and the second upper rotary winding blade 210 immediately above it is set to each rotational winding above the second stage. It may be set smaller than the clearance F between the upper blades 210. In addition, the diameter of the lowermost base blade 22 and the diameter of the other base blade 220 are the same in consideration of the clearance U (see FIG. 10) between the heat transfer surface 12.

前記上下間のクリアランスFの具体的な値としては、例えば、前記直径が2000mmである場合には、0〜300mmの範囲内で設定することになる。ここで前記直径は、乾燥槽11の具体的な内径寸法に応じて様々であり、この乾燥槽11の内径寸法に応じて、前記直径、そして上下間のクリアランスFが具体的に設定される。また、前記0〜300mmの範囲内にて何れのクリアランスに設定するかは、被乾燥物の種類に応じて適宜定めることになる。   As a specific value of the clearance F between the upper and lower sides, for example, when the diameter is 2000 mm, it is set within a range of 0 to 300 mm. Here, the diameter varies depending on the specific inner diameter of the drying tank 11, and the diameter and the clearance F between the upper and lower sides are specifically set according to the inner diameter of the drying tank 11. Further, which clearance is set within the range of 0 to 300 mm is appropriately determined according to the type of the object to be dried.

例えば、被乾燥物が下水処理場の脱水汚泥の場合、含水率は80〜85%であり、被乾燥物の水分蒸発が進み65〜70%の含水率になると、粘性が著しく大きくなり一部が塊状になる。このような特性に応じて、前記上下間のクリアランスFは、前記0〜300mmの範囲内のうち特に100〜180mmの範囲内で定めれば、安定した高い乾燥効率を実現することができる。かかる数値は、乾燥槽11の内径寸法に応じて変動するものであり、例えば、前記直径が1000mmである場合には、上下間のクリアランスFは50〜90mmの範囲で適宜定めることになる。   For example, when the material to be dried is dewatered sludge from a sewage treatment plant, the moisture content is 80 to 85%, and when the moisture content of the material to be dried advances and reaches a moisture content of 65 to 70%, the viscosity becomes extremely large and partly Becomes clumpy. According to such characteristics, if the clearance F between the upper and lower sides is determined within the range of 100 to 180 mm in the range of 0 to 300 mm, stable high drying efficiency can be realized. Such numerical values vary depending on the inner diameter of the drying tank 11. For example, when the diameter is 1000 mm, the clearance F between the upper and lower sides is appropriately determined in the range of 50 to 90 mm.

あるいは、被乾燥物が下水汚泥で未脱水汚泥の場合、含水率が95〜98%であり、液状の状態であるため、前述のように水分蒸発が進んで65〜70%になっても、固形物の容量は極端に少ない。このような特性に応じて、上下間のクリアランスFを、前記0〜300mmの範囲内のうちさらに狭い30〜120mmの範囲内で定めれば、粘性が高くてもジャケット13への接触効率を高めることができる。また、前記直径が1000mmである場合には、上下間のクリアランスFは15〜60mmの範囲で適宜定めることになる。その他の被乾燥物に応じた上下間のクリアランスFは後述するが、何れも前記直径の0〜15%となる比率の範囲内で具体的に定めることになる。   Alternatively, when the material to be dried is sewage sludge and non-dehydrated sludge, the moisture content is 95 to 98%, and it is in a liquid state, so even if moisture evaporation proceeds as described above to 65 to 70%, The volume of solids is extremely small. According to such characteristics, if the clearance F between the upper and lower sides is determined within a narrower range of 30 to 120 mm within the range of 0 to 300 mm, the contact efficiency to the jacket 13 is enhanced even if the viscosity is high. be able to. Moreover, when the said diameter is 1000 mm, the clearance F between upper and lower sides will be suitably determined in the range of 15-60 mm. Although the clearance F between the upper and lower sides according to other to-be-dried objects is mentioned later, all will be specifically defined within the range of the ratio which becomes 0 to 15% of the said diameter.

このような比率の範囲内に上下間のクリアランスFを定めることで、最下段の回転巻上羽根21から最上段の回転巻上羽根210に亘り、各段ごとに被乾燥物をジャケット13に均一な薄膜状に伝熱面12に押し付け、しかも、最適な時間を経て順次上昇させることが可能となる。   By setting the clearance F between the upper and lower sides within the range of such a ratio, the material to be dried is uniformly placed on the jacket 13 for each stage from the lowermost rotary upper blade 21 to the uppermost rotary upper blade 210. It is possible to press the heat transfer surface 12 in a thin film shape and to raise it sequentially after an optimal time.

上下間のクリアランスFが直径の0%未満、すなわち上下の各基羽根22,220が一部でも上下方向に重なり合う場合には、余計な乱気流が生じて干渉し合い、巻き上げ作用が減殺される。一方、上下間のクリアランスFが直径の15%より大きくなると、被乾燥物の種類を問わず、各段ごとに上方へと被乾燥物がうまく受け渡されず、上昇が途中で止まってしまうことが、発明者らの数多の実験により確かめられている。なお、上下間のクリアランスFの下限は、前述したが前記直径の0%以上の数値にて、実際の被乾燥物の種類に応じた最適値があることも確かめられている。   When the clearance F between the upper and lower sides is less than 0% of the diameter, that is, when the upper and lower base blades 22 and 220 partially overlap in the vertical direction, extra turbulence is generated and interferes with each other, and the winding action is reduced. On the other hand, if the clearance F between the upper and lower sides is larger than 15% of the diameter, regardless of the type of the object to be dried, the object to be dried is not successfully delivered upward in each stage, and the rise stops midway. However, it has been confirmed by numerous experiments by the inventors. In addition, although the minimum of the clearance F between upper and lower sides was mentioned above, it has also been confirmed that there exists the optimal value according to the kind of actual to-be-dried object in the numerical value of 0% or more of the said diameter.

また、本実施の形態では、最上段の回転巻上羽根210の上方に、前記乾燥槽11内壁に設けられ、前記最上段の回転巻上羽根210より上方に向かう前記伝熱面12に薄膜状に押し付けられた被乾燥物を受け止めて、回転巻上羽根210の内側より下方へ落下させる受止板30が配されている。受止板30は、その面が回転巻上羽根210の回転方向と対向するように配される板状の部材から成り、円周方向に並ぶように配されている。   Further, in the present embodiment, a thin film is formed on the heat transfer surface 12 provided on the inner wall of the drying tank 11 above the uppermost rotary hoist blade 210 and directed upward from the uppermost rotary hoist blade 210. A receiving plate 30 is provided that receives the object to be dried pressed against the upper surface of the rotating upper blade 210 and drops it downward. The receiving plate 30 is composed of a plate-like member whose surface is opposed to the rotational direction of the rotary hoist blade 210 and is arranged so as to be arranged in the circumferential direction.

図1に示すように、受止板30は、上下に細幅状に延びる面を備えた板状の部材からなり、軸心方向には余り突出しないように構成されている。このような受止板30は、前記伝熱面12の上下に亘る広い範囲で薄膜状の被乾燥物を受け止められる一方、乾燥槽11内部における各回転巻上羽根21,210の回転により生じる気流に極力干渉しない形状となっている。   As shown in FIG. 1, the receiving plate 30 is made of a plate-like member having a vertically extending surface and is configured not to protrude much in the axial direction. Such a receiving plate 30 receives a thin film-like object to be dried over a wide range above and below the heat transfer surface 12, while airflow generated by the rotation of the rotating upper and lower blades 21, 210 inside the drying tank 11. The shape is such that it does not interfere with as much as possible.

受止板30の面が回転巻上羽根210の回転方向と対向する角度は、詳しく言えば直角ではなく、薄膜状の被乾燥物に対して斜めにぶつかり、被乾燥物を軸心に向けて逃がすことができる角度に傾斜している。本実施の形態では、受止板30は具体的には3枚が円周方向に等間隔に配されているが、この受止板30の具体的な形状や配置は適宜定め得る設計事項であり、少なくとも2以上設けると良く、乾燥槽11の内径寸法に応じて、例えば、内径が大きくなるに従い数を増やすことになる。また、必ずしも各受止板30を等間隔に並べる必要はない。   More specifically, the angle at which the surface of the receiving plate 30 faces the rotational direction of the rotary hoist blade 210 is not a right angle, but is slanted against the thin film-like object to be dried, and the object to be dried is directed toward the axis. It is inclined at an angle that allows it to escape. In the present embodiment, the three receiving plates 30 are specifically arranged at equal intervals in the circumferential direction, but the specific shape and arrangement of the receiving plates 30 are design matters that can be determined as appropriate. Yes, it is good to provide at least two or more. For example, the number increases as the inner diameter increases, depending on the inner diameter of the drying tank 11. Further, it is not always necessary to arrange the receiving plates 30 at equal intervals.

次に、第1実施の形態に係る乾燥装置10の作用について説明する。
乾燥槽11の上蓋14にある供給口より乾燥槽11内に被乾燥物を投入する。そして、電動モータ18を駆動し回転軸20をR方向へ回転させると、上下段の各回転巻上羽根21,210が一斉に回転する。すると、各回転巻上羽根21,210の基羽根22,220ごとに、それぞれ被乾燥物が一端部22a,220aから平坦面23,230上に載り、他端部22b,220b側へ移動していく。
Next, the operation of the drying apparatus 10 according to the first embodiment will be described.
An object to be dried is put into the drying tank 11 from a supply port in the upper lid 14 of the drying tank 11. When the electric motor 18 is driven to rotate the rotating shaft 20 in the R direction, the upper and lower rotary winding upper blades 21 and 210 rotate all at once. Then, for each of the base blades 22 and 220 of the rotary winding upper blades 21 and 210, the material to be dried is placed on the flat surfaces 23 and 230 from the one end portions 22a and 220a, and moved to the other end portions 22b and 220b side. Go.

このとき、被乾燥物には上方へ向かわせる力が働き、被乾燥物は巻き上げられると共に、遠心力によって伝熱面12に押し付けられる(図9,図10参照)。かかる巻き上げ作用と押し付け作用を与える各基羽根22,220の平坦面23,230は、伝熱面12に沿って細長形状に延び、かつ外周端が伝熱面12との間にクリアランスUを保つ弧状である。従って、被乾燥物に単に衝撃を与えるのではなく、被乾燥物への巻き上げ作用と、伝熱面12への押し付け作用が効果的に発揮される。   At this time, an upward force acts on the object to be dried, and the object to be dried is rolled up and pressed against the heat transfer surface 12 by centrifugal force (see FIGS. 9 and 10). The flat surfaces 23 and 230 of the base blades 22 and 220 that give such a winding action and a pressing action extend in an elongated shape along the heat transfer surface 12, and the outer peripheral end maintains a clearance U between the heat transfer surface 12. It is arcuate. Accordingly, the object to be dried is not simply given an impact, but the action of winding up the object to be dried and the pressing action against the heat transfer surface 12 are effectively exhibited.

一つの連続した羽根によって被乾燥物が乾燥槽11内を上昇移動するわけではなく、各基羽根22,220ごとに順次、被乾燥物は巻き上げられ、かつ伝熱面12へ押し付けられる。このため、粘性の強い被乾燥物等であっても、伝熱面12に付着することがなく、伝熱面12上の特定箇所に被乾燥物が滞留することもない。また、各基羽根22,220は、平面視で360度の円周範囲内の長さしか有さず独立しているので、各基羽根22,220の平坦面23,230の外周端と伝熱面12との間の前記クリアランスUも一続きに連続していないから、被乾燥物中の異物がクリアランスUに噛み込んだとしても、直ちに逃げて噛み込みは継続しない。   The object to be dried is not moved up and down in the drying tank 11 by one continuous blade, but the object to be dried is wound up and pressed against the heat transfer surface 12 sequentially for each base blade 22, 220. For this reason, even if it is a to-be-dried material etc. with strong viscosity, it does not adhere to the heat-transfer surface 12, and a to-be-dried material does not remain in the specific location on the heat-transfer surface 12. Further, each base blade 22 and 220 has a length within a circumferential range of 360 degrees in plan view and is independent, so that the base blades 22 and 220 are independent of the outer peripheral ends of the flat surfaces 23 and 230 of the base blades 22 and 220. Since the clearance U between the heating surface 12 and the hot surface 12 is not continuous, even if foreign matter in the material to be dried bites into the clearance U, it immediately escapes and does not continue to bite.

特に、最下段の回転巻上羽根21における各基羽根22は、他の段の各基羽根220に比べて長い寸法であるため、最初は乾燥槽11の底部に多く溜まる被乾燥物に対して、いっそう大きな巻き上げ力を付与することができる。よって、乾燥槽11の底部から上方の各段に向けて被乾燥物を円滑に移動させることが可能となる。しかも、最下段の各基羽根22を支える取付アーム24は、図4に示すように底板15に対して傾斜しているから、底板15上に溜まる被乾燥物は、基羽根22のみならず取付アーム24によっても積極的にすくい上げることができる。これにより、より早期に被乾燥物を伝熱面12に接触させることができる。   In particular, the base blades 22 in the lowermost rotary winding upper blade 21 have a longer dimension than the base blades 220 in the other stages. It is possible to apply a greater winding force. Therefore, it becomes possible to smoothly move the object to be dried from the bottom of the drying tank 11 toward the upper stages. Moreover, since the mounting arm 24 that supports each base blade 22 at the lowermost stage is inclined with respect to the bottom plate 15 as shown in FIG. The arm 24 can also scoop up actively. Thereby, an object to be dried can be brought into contact with the heat transfer surface 12 at an earlier stage.

さらに、回転巻上羽根21,210が上下に複数段あることにより、各段ごとに被乾燥物を巻き上げつつ、薄膜状に伝熱面12に押し付け、後から巻き上げる被乾燥物で先に巻き上げた被乾燥物を一段上まで押すように上昇させる。これにより、最下段の回転巻上羽根21から最上段の回転巻上羽根210まで、被乾燥物を連続して乾燥しつつ順次上昇させることができ、乾燥槽11内壁の縦方向における伝熱面12全面を有効に活用することになり、縦型の利点を生かした非常に高い乾燥効率を確実に実現することができる。   Furthermore, since the rotating upper and lower blades 21, 210 have a plurality of upper and lower stages, the object to be dried is wound up at each stage, pressed against the heat transfer surface 12 in a thin film shape, and then wound up with the object to be dried that is wound up later. Raise the object to be dried to push it up one step. Thus, the material to be dried can be sequentially raised while continuously drying from the lowermost rotating upper blade 21 to the uppermost rotating upper blade 210, and the heat transfer surface in the vertical direction of the inner wall of the drying tank 11 Thus, the entire surface can be effectively used, and extremely high drying efficiency can be reliably realized by taking advantage of the vertical type.

図10に示すように、各段ごとに伝熱面12に薄膜状に押し付けられた被乾燥物は、伝熱面12に接触する面を有すると共に、薄膜状の内周側となり乾燥槽11内の空気と接触する蒸発面Eを有する。このような過程において、乾燥槽11内に前記熱風導入部19から熱風を導入して、該熱風を被乾燥物の薄膜状の内周側に吹き付ける。これにより、被乾燥物の薄膜状の内周側から加熱することができ、被乾燥物の水分蒸発が推進される。被乾燥物は伝熱面12に沿って薄膜状に拡がるが、被乾燥物が空気に接する内周側の蒸発面Eより熱風があたり積極的に加熱されるため、加熱効率を高めることができる。   As shown in FIG. 10, the material to be dried pressed into the heat transfer surface 12 for each step has a surface in contact with the heat transfer surface 12, and becomes a thin film inner peripheral side in the drying tank 11. Evaporating surface E that contacts the air. In such a process, hot air is introduced into the drying tank 11 from the hot air introducing section 19 and blown to the inner peripheral side of the object to be dried. Thereby, it can heat from the thin film-like inner peripheral side of a to-be-dried object, and the moisture evaporation of a to-be-dried object is promoted. The object to be dried spreads in a thin film shape along the heat transfer surface 12, but the object to be dried is positively heated from the evaporation surface E on the inner peripheral side in contact with the air, so that the heating efficiency can be increased. .

ここで乾燥槽11内に導入される熱風は、熱風導入部19が乾燥槽11の底板15に連通する開口より上方に向かうが、直ぐ上方にある前述の円盤状のカバー(図示省略)に当たって乾燥槽11の中心側より側方に向かうことになる。このように吹き出された熱風は、回転巻上羽根21,210の回転より生じる気流と遠心力により渦巻き状になって上昇しつつ、被乾燥物の薄膜状の内周側に吹き付けられる。これにより、乾燥槽11内部の気流と熱風とが衝突し合うことがなく、被乾燥物の巻き上げ作用を損ねる虞はなく、よりいっそう巻き上げ作用を向上させることができる。   Here, the hot air introduced into the drying tank 11 is directed upward from the opening through which the hot air introduction portion 19 communicates with the bottom plate 15 of the drying tank 11, but hits the disk-shaped cover (not shown) immediately above and is dried. It will go to the side from the center side of the tank 11. The hot air blown out in this way is blown to the inner peripheral side of the object to be dried while being spirally raised by the airflow and centrifugal force generated by the rotation of the rotary upper blades 21 and 210. Thereby, the air flow inside the drying tank 11 and the hot air do not collide with each other, there is no possibility of impairing the hoisting action of the object to be dried, and the hoisting action can be further improved.

また、同時にボイラーからジャケット13内に蒸気を導入して、伝熱面12を加熱すると良い。かかる場合、伝熱面12に接触した被乾燥物は、伝熱面12からの熱により、薄膜状に拡がる外周側でもある程度の水分蒸発が起こる。加熱された伝熱面12への接触により水分蒸発し含水率が低くなった被乾燥物は、さらに前記蒸発面Eに移動しつつ空気に晒されるため、さらに水分蒸発が進むことになる。しかも、前述したように、前記蒸発面Eには熱風が吹き付けられるため、蒸発面Eにおける水分蒸発がよりいっそう促進されることになる。   At the same time, steam may be introduced from the boiler into the jacket 13 to heat the heat transfer surface 12. In such a case, to-be-dried material that has contacted the heat transfer surface 12 undergoes a certain amount of water evaporation even on the outer peripheral side spreading in a thin film shape due to heat from the heat transfer surface 12. Since the object to be dried whose water content has been lowered by contact with the heated heat transfer surface 12 and has a low moisture content is exposed to the air while moving to the evaporation surface E, the water evaporation further proceeds. In addition, as described above, since hot air is blown onto the evaporation surface E, moisture evaporation on the evaporation surface E is further promoted.

すなわち、各基羽根22,220の平坦面23,230上にて被乾燥物は、上方に向かって徐々に伝熱面12と蒸発面Eが近くなるような薄膜状に拡がるが、ここで被乾燥物は、前述したように熱風により加熱されるのみならず、加熱手段で加熱された伝熱面12によっても積極的に加熱されるため、加熱効率が格段に高まることになる。なお、伝熱面12は必ずしも加熱する必要はなく、被乾燥物の具体的な種類や量に応じて加熱するかどうかを適宜定めると良い。   That is, on the flat surfaces 23 and 230 of the base blades 22 and 220, the material to be dried gradually spreads upward in a thin film shape so that the heat transfer surface 12 and the evaporation surface E are close to each other. As described above, the dried product is not only heated by hot air, but also actively heated by the heat transfer surface 12 heated by the heating means, so that the heating efficiency is remarkably increased. Note that the heat transfer surface 12 does not necessarily have to be heated, and it is preferable to appropriately determine whether or not to heat the heat transfer surface 12 according to the specific type and amount of the object to be dried.

また、熱風の発生源は特に問わないが、前述したように乾燥装置10が廃ガスを燃焼させて無害化する燃焼炉を備える場合には、この燃焼炉における燃焼で生じた熱風を、前記伝熱面12の加熱手段として利用すると共に、乾燥工程中の乾燥槽11内に導入すれば良い。これにより、前記伝熱面12の加熱手段を別途用意する必要がなく、さらには、乾燥槽11内に導く熱風の発生源としても利用することができ、ランニングコストを低減することが可能となる。   The source of hot air is not particularly limited. However, as described above, when the drying apparatus 10 includes a combustion furnace that burns waste gas and renders it harmless, the hot air generated by the combustion in the combustion furnace is transmitted. What is necessary is just to introduce | transduce into the drying tank 11 in a drying process while using as a heating means of the hot surface 12. Thereby, it is not necessary to separately prepare a heating means for the heat transfer surface 12, and furthermore, it can be used as a source of hot air to be introduced into the drying tank 11, and the running cost can be reduced. .

前述したように被乾燥物は、伝熱面12側から蒸発面Eへ移動すると同時に、各基羽根22,220による巻き上げ作用により、後から巻き上げる被乾燥物が先に巻き上げた被乾燥物を断続的に押し、被乾燥物は伝熱面12に沿って上昇していく。つまり、被乾燥物は、伝熱面12から蒸発面Eへ移動しつつ、伝熱面12に沿って巻き上がり、上昇しつつ乾燥する。このような乾燥工程が各段ごとに順次繰り返されることになる。   As described above, the material to be dried moves from the heat transfer surface 12 side to the evaporation surface E, and at the same time, the material to be dried later is intermittently connected to the material to be dried after being wound up by the base blades 22 and 220. The object to be dried rises along the heat transfer surface 12. That is, the object to be dried rolls up along the heat transfer surface 12 while moving from the heat transfer surface 12 to the evaporation surface E, and dries while rising. Such a drying process is sequentially repeated for each stage.

ここで重要となるのが、前述したように各段の回転巻上羽根21,210における上下間の基羽根22,220の相対的な配置である。かかる配置は前述した図7および図8に示すように、上下間における各基羽根22,220が平面視で所定角度ずつ位相がずれて、回転方向Rと逆方向に延びる多重(本実施の形態では3重)の螺旋階段状に並ぶように配設されている。   What is important here is the relative arrangement of the base blades 22 and 220 between the upper and lower portions of the rotary upper and lower blades 21 and 210 of each stage as described above. As shown in FIGS. 7 and 8, the arrangement is such that the base blades 22 and 220 between the upper and lower sides are shifted in phase by a predetermined angle in a plan view and extend in the direction opposite to the rotational direction R (this embodiment) In this case, they are arranged in a three-fold spiral staircase.

このような特別な配置によって、先ずは最下段の基羽根22と取付アーム24により乾燥槽11の底部よりすくい上げられた被乾燥物は、遠心力で伝熱面12に薄膜状に押し付けられつつ、直ぐ上の2段目の基羽根220の一端部220aにすくい上げられる。さらに、2段目の基羽根220により巻き上げられた被乾燥物は、同様に伝熱面12に薄膜状に押し付けられつつ、直ぐ上の3段目の基羽根220の一端部220aにすくい上げられる。   By such a special arrangement, the material to be dried scooped up from the bottom of the drying tank 11 by the base blade 22 and the mounting arm 24 at the bottom is first pressed against the heat transfer surface 12 by a centrifugal force in a thin film shape. It is scooped up to one end 220a of the second stage base blade 220 immediately above. Further, the material to be dried wound up by the second-stage base blade 220 is scooped up to one end portion 220a of the third-stage base blade 220 immediately above, while being similarly pressed against the heat transfer surface 12.

すなわち、乾燥槽11内に投入された被乾燥物は、最下段の回転巻上羽根21から最上段の回転巻上羽根210に向かって、それぞれの基羽根22,220が断続的に連なる多重螺旋階段を上るようにして順次移動しつつ乾燥される。また、2段目以降の回転巻上羽根210の回転により、被乾燥物に上昇力と遠心力を補充することができる。このように、乾燥槽11内壁の縦方向における伝熱面12全面を有効に活用することが可能となり、縦型の利点を生かした非常に高い乾燥効率を確実に実現することができる。   That is, the material to be dried put into the drying tank 11 is a multiple helix in which the base blades 22 and 220 are intermittently connected from the lowermost rotary upper blade 21 to the uppermost rotary upper blade 210. It is dried while moving sequentially as it goes up the stairs. In addition, ascending force and centrifugal force can be supplemented to the object to be dried by the rotation of the rotary upper and lower blades 210 in the second and subsequent stages. In this way, the entire heat transfer surface 12 in the vertical direction of the inner wall of the drying tank 11 can be effectively used, and very high drying efficiency can be reliably realized by taking advantage of the vertical type.

最下段の回転巻上羽根21の各基羽根22は、他の段の回転巻上羽根210の各基羽根220に比べて長く形成され、この最下段の各基羽根22は、それぞれの他端部22bが、回転方向と逆方向に隣り合う他の基羽根22の一端部22aよりも高い位置で平面視で重なるように配置されている。これにより、最初は乾燥槽11の底部に多く溜まる被乾燥物に対して、より大きな巻き上げ力を付与することができ、乾燥槽11の底部から上方への各段に向けて被乾燥物を円滑に移動させることが可能となる。また、本実施の形態では、取付アーム24が、底板15上に溜まる被乾燥物を積極的に掻き取る作用も果たしている。   Each base blade 22 of the lowermost rotary winding upper blade 21 is formed longer than each base blade 220 of the other stage rotary winding upper blade 210, and each lowermost base blade 22 has its other end. The part 22b is arranged so as to overlap in a plan view at a position higher than the one end part 22a of the other base blade 22 adjacent in the direction opposite to the rotation direction. As a result, it is possible to apply a larger winding force to the material to be dried that initially accumulates at the bottom of the drying tank 11, and smooth the material to be dried toward each step upward from the bottom of the drying tank 11. It is possible to move to. In the present embodiment, the mounting arm 24 also positively scrapes the material to be dried that accumulates on the bottom plate 15.

図9に示すように、上下に並ぶ各基羽根220は、下方の基羽根220の他端部220bに対して、回転方向と逆方向の間近に位置する上方の基羽根220の一端部220aが、平面視で重ならずに前記逆方向に離隔し、前記下方の基羽根220の他端部220bにおける平坦面230を延長した傾斜面より下方に位置するように配置されている。これにより、下の段の基羽根220で巻き上げられて伝熱面12に沿って斜め上方に移動する被乾燥物を、上の段の基羽根220の一端部220aに確実に受け渡すことができる。   As shown in FIG. 9, the base blades 220 arranged in the vertical direction have one end portion 220 a of the upper base blade 220 positioned close to the rotation direction opposite to the other end portion 220 b of the lower base blade 220. In the plan view, they are separated from each other in the opposite direction without being overlapped, and are disposed below the inclined surface extending from the flat surface 230 at the other end 220b of the lower base blade 220. As a result, the material to be dried that is wound up by the base blade 220 at the lower stage and moves obliquely upward along the heat transfer surface 12 can be reliably delivered to the one end portion 220 a of the base blade 220 at the upper stage. .

このような特別な配置により、上下に並ぶ回転巻上羽根210の基羽根220の位置を、単に回転方向に一定の角度ずらして配置することで、ある程度は認められていた効果、すなわち、下の段の基羽根22,220で巻き上げた被乾燥物を上の段の基羽根220の一端部でタイミング良くすくい上げるという効果を、よりいっそう確実かつ顕著に発揮することが可能となる。なお、2段目以降の各基羽根220は、回転軸20を中心とする60度の角度範囲で円弧状に延びる長さであり、隣り合う基羽根220同士の平坦面230は円周方向に互いに重なることはなく、上下間で所定角度ずつ位相がずれるように容易に配設することができる。   With such a special arrangement, the position of the base blade 220 of the rotary hoisting blades 210 aligned vertically is simply shifted by a certain angle in the rotational direction, and an effect that has been recognized to some extent, that is, The effect of scooping up the material to be dried wound up by the base blades 22 and 220 at the stage at one end of the base blade 220 at the upper stage can be more reliably and significantly exhibited. In addition, each base blade 220 after the second stage has a length extending in an arc shape in an angle range of 60 degrees around the rotation axis 20, and the flat surfaces 230 of the adjacent base blades 220 are in the circumferential direction. They do not overlap each other and can be easily arranged so that the phases are shifted by a predetermined angle between the upper and lower sides.

また、上下間の基羽根22,220の相対的な配置と同様に重要となるのが、各段の回転巻上羽根21,210における上下間のクリアランスFである。このクリアランスFの値を、回転巻上羽根21,210の直径の0〜15%となる比率とすることで、最下段の回転巻上羽根21から最上段の回転巻上羽根210に亘り、各段ごとに被乾燥物を均一な薄膜状に伝熱面12に押し付け、しかも、最適な時間を経て順次上昇させることが可能となる。このような比率の範囲内で被乾燥物の具体的な種類に応じて、各段の回転巻上羽根21,210における上下間のクリアランスFの寸法を適宜定めると良い。   What is important as well as the relative arrangement of the base blades 22 and 220 between the upper and lower sides is the clearance F between the upper and lower sides of the rotary winding upper and lower blades 21 and 210 of each stage. By setting the value of the clearance F to a ratio of 0 to 15% of the diameter of the rotary hoist blades 21 and 210, the lowermost rotary hoist blade 21 to the uppermost rotary hoist blade 210 are respectively It becomes possible to press the object to be dried against the heat transfer surface 12 in a uniform thin film shape for each stage, and to raise it sequentially after an optimal time. Within such a range of ratios, the dimension of the clearance F between the upper and lower sides of the rotary upper and lower blades 21 and 210 of each stage may be appropriately determined according to the specific type of the object to be dried.

具体的には例えば、生ごみに関しては、調理残漆、期限切れ品の食品等は野菜屑が非常に多く、全体的に繊維質が多いため、粘着性に乏しい。このような特性の被乾燥物を主に扱う乾燥装置10では、各段の回転巻上羽根21,210における上下間のクリアランスFの値を、乾燥槽11の内径寸法に応じて変動するが、この内径寸法に合わせた各基羽根22,220の直径の0〜15%として、大体20〜120mmに設定する。これにより、乾燥槽11内壁の縦方向における伝熱面12全面に対して、被乾燥物である生ごみの乾燥に良好な接触状態を維持することができる。   Specifically, for example, regarding kitchen waste, uncooked lacquer, expired foods, etc. have a large amount of vegetable scraps and a large amount of fiber as a whole, and therefore have poor adhesion. In the drying apparatus 10 that mainly handles an object to be dried having such characteristics, the value of the clearance F between the upper and lower sides of the rotary upper and lower blades 21 and 210 of each stage varies depending on the inner diameter of the drying tank 11, The diameter is set to about 20 to 120 mm as 0 to 15% of the diameter of each base blade 22 and 220 according to the inner diameter. Thereby, the favorable contact state can be maintained with respect to the drying of the garbage which is a to-be-dried object with respect to the heat-transfer surface 12 whole surface in the vertical direction of the drying tank 11 inner wall.

また、魚介類のような生物の場合は、乾燥が進むと粘性がなくなり、パサパサした状態となるため、伝熱面12に対して非常に薄膜になりやすい。このような特性の被乾燥物を主に扱う乾燥装置10では、各段の回転巻上羽根21,210における上下間のクリアランスFの値は、乾燥槽11の内径寸法に応じて変動するが大体50〜200mmに設定する。これにより、乾燥槽11内壁の縦方向における伝熱面12全面に対して、被乾燥物である生物の乾燥に良好な接触状態を維持することができる。   In addition, in the case of organisms such as seafood, the viscosity disappears as the drying progresses, resulting in a crumbly state. In the drying apparatus 10 that mainly handles an object to be dried having such characteristics, the value of the clearance F between the upper and lower sides of the rotary upper and lower blades 21 and 210 of each stage varies depending on the inner diameter of the drying tank 11, but is roughly. Set to 50-200 mm. Thereby, the favorable contact state can be maintained with respect to the drying of the organism which is a to-be-dried object with respect to the heat-transfer surface 12 whole surface in the vertical direction of the drying tank 11 inner wall.

また、廃液の場合は、水分量が多く、固形物が非常に少ない。このような特性の被乾燥物を主に扱う乾燥装置10では、各段の回転巻上羽根21,210における上下間のクリアランスFの値は、乾燥槽11の内径寸法に応じて変動するが大体100〜250mmに設定する。これにより、乾燥槽11の伝熱面12に沿って被乾燥物を効率良く上昇させることができ、また伝熱面12全面に対して確実に接触させることができる。   In the case of waste liquid, the amount of water is large and the amount of solid matter is very small. In the drying apparatus 10 that mainly handles an object to be dried having such characteristics, the value of the clearance F between the upper and lower sides of the rotary upper and lower blades 21 and 210 of each stage varies depending on the inner diameter of the drying tank 11, but is roughly. Set to 100-250 mm. Thereby, a to-be-dried object can be efficiently raised along the heat-transfer surface 12 of the drying tank 11, and can be made to contact with respect to the heat-transfer surface 12 whole surface reliably.

また、果物の場合は、水分が比較的多く糖分も多いため、水分が蒸発し固形分の比率が多くなるに従い、粘着率が高くなる。このような特性により、縦方向の上部に上昇しやすく下部や中間部に空間ができ、接触が悪く均一に薄膜になり難いが、前記クリアランスFの値を80〜150mmに設定することにより、乾燥槽11内壁の縦方向における伝熱面12全面に対して、被乾燥物を確実に薄膜状に押し付けることができる。   In the case of fruits, since the water content is relatively high and the sugar content is high, the adhesion rate increases as the water content evaporates and the solid content ratio increases. Due to such characteristics, it is easy to rise in the upper part in the vertical direction, and spaces are formed in the lower part and the middle part, and it is difficult to form a thin film uniformly due to poor contact. However, by setting the clearance F to 80 to 150 mm, An object to be dried can be surely pressed into a thin film shape against the entire heat transfer surface 12 in the vertical direction of the inner wall of the tank 11.

また、米飯・うどん・そば等のような炭水化物の場合は、含水率が少ないが、加熱することによりモチ状になり粘りが非常に高くなる。このような炭水化物は、従来の乾燥装置での乾燥は不可能とされていたが、本乾燥装置10によれば、前記クリアランスFの値を0〜80mmに設定することにより、乾燥槽11内壁の縦方向における伝熱面12全面に対して、被乾燥物である炭水化物の乾燥に良好な接触状態を維持することができる。   In the case of carbohydrates such as cooked rice, udon and soba, the moisture content is low, but when heated, it becomes sticky and very sticky. Such carbohydrates were supposed to be impossible to dry with a conventional drying apparatus. However, according to the present drying apparatus 10, the value of the clearance F is set to 0 to 80 mm, so that It is possible to maintain a good contact state with respect to the drying of the carbohydrate that is the object to be dried with respect to the entire heat transfer surface 12 in the vertical direction.

また、イカの内臓は非常に水分が多く、同時に脂分が多く固形分が少なく、蒸発が進んで水分がなくなると、油によりドロドロのスラリーになる。このような特性の被乾燥物を主に扱う乾燥装置10では、前記クリアランスFの値を30〜150mmに設定することにより、乾燥槽11内壁の縦方向における伝熱面12全面に対して、被乾燥物を確実に薄膜状に押し付けることができ、品質の良い乾燥物を生成することができる。   In addition, the internal organs of squid have a very high water content, and at the same time a high fat content and a low solid content. In the drying apparatus 10 mainly handling the object to be dried having such characteristics, by setting the clearance F to 30 to 150 mm, the entire surface of the heat transfer surface 12 in the vertical direction of the inner wall of the drying tank 11 is covered. The dried product can be reliably pressed into a thin film, and a dried product with good quality can be produced.

また、動物の残澄および弊死獣等のミンチを乾燥する場合、これらは非常に油が多いため、水分を蒸発させると固形分と多くの油の混合物になる。このような特性の被乾燥物を主に扱う乾燥装置10では、前記クリアランスFの値を80〜180mmに設定することにより、乾燥槽11内壁の縦方向における伝熱面12全面に対して、被乾燥物を乾燥に良好な接触状態に維持することができる。   Also, when drying mince such as animal residues and dead animals, these are very oily, and evaporating the water will result in a mixture of solids and many oils. In the drying apparatus 10 mainly handling the object to be dried having such characteristics, by setting the clearance F to 80 to 180 mm, the entire surface of the heat transfer surface 12 in the vertical direction of the inner wall of the drying tank 11 is covered. The dried product can be maintained in a good contact state for drying.

さらに、茶粕等の場合は、脱水されているため、水分が少なく粘性が全くないため、前記クリアランスFの値を0〜60mmに設定することで、被乾燥物を縦方向に効率良く上昇させることができ、伝熱面12全面に対して確実に接触させることができる。その他、粉体のように含水率が30〜50%と少ない被乾燥物の場合は、粘性が少ないため、前記クリアランスFの値を0〜30mmに設定することで、被乾燥物を縦方向に効率良く上昇させることができ、伝熱面12全面に対して確実に接触させることができる。   Furthermore, in the case of tea bowls and the like, since they are dehydrated, there is little moisture and there is no viscosity at all. Therefore, by setting the value of the clearance F to 0 to 60 mm, the material to be dried is efficiently raised in the vertical direction. It is possible to contact the entire heat transfer surface 12 with certainty. In addition, in the case of an object to be dried such as powder having a low moisture content of 30 to 50%, since the viscosity is small, by setting the value of the clearance F to 0 to 30 mm, It can raise efficiently and can contact reliably with respect to the heat-transfer surface 12 whole surface.

以上のように、種々様々な被乾燥物は、前記クリアランスFの値がそれぞれ各基羽根22,220の直径の0〜15%の範囲内に入っていない場合は、縦方向への上昇効率が悪く、伝熱面12への接触効率も悪くなり、乾燥装置10の重要な性能の一つである乾燥時間が極端に多くなる。特に、上昇効率が悪いということは、乾燥槽11内壁の縦方向における伝熱面12全面を活用するという縦型の利点を生かすことができなくなる。よって、各段の回転巻上羽根21,210における上下間のクリアランスFの寸法は重要となる。   As described above, when various kinds of objects to be dried do not have the value of the clearance F within the range of 0 to 15% of the diameters of the respective base blades 22 and 220, the ascending efficiency in the vertical direction is increased. It worsens, the contact efficiency to the heat-transfer surface 12 also worsens, and the drying time which is one of the important performances of the drying apparatus 10 becomes extremely long. In particular, the fact that the ascending efficiency is poor makes it impossible to take advantage of the vertical type of utilizing the entire heat transfer surface 12 in the vertical direction of the inner wall of the drying tank 11. Therefore, the dimension of the clearance F between the upper and lower sides of the rotary winding upper blades 21 and 210 of each stage is important.

また、図1において、最上段の回転巻上羽根210より上方に向かう前記伝熱面12に薄膜状に押し付けられた被乾燥物は、乾燥槽11内壁に設けられた受止板30によって受け止められて、そのまま上昇することなく各回転巻上羽根210の内側より下方へ落下する。これにより、被乾燥物は再び最下段の回転巻上羽根21より乾燥工程が繰り返されるため、よりいっそう乾燥効率を高めることができる。   Moreover, in FIG. 1, the to-be-dried object pressed by the said heat-transfer surface 12 which goes upwards from the uppermost rotary winding upper blade | wing 210 is received by the receiving plate 30 provided in the drying tank 11 inner wall. Thus, it falls downward from the inside of each rotary hoist blade 210 without rising as it is. As a result, the drying process is repeated again from the lowermost rotating upper blade 21 so that the drying efficiency can be further increased.

ここで受止板30は、図1に示すように、上下に細幅状に延びる面を備えた板状の部材からなるので、伝熱面12の上下に亘る広い範囲で薄膜状の被乾燥物を受け止めることができる。また、受止板30は、軸心方向には余り突出しないように構成されているから、乾燥槽11内部における各回転巻上羽根21,210の回転により生じる気流の流れを損ねることがない。   Here, as shown in FIG. 1, the receiving plate 30 is made of a plate-like member having a vertically extending surface, so that it is dried in a thin film form over a wide range above and below the heat transfer surface 12. You can catch things. Further, since the receiving plate 30 is configured not to protrude so much in the axial direction, the flow of the airflow generated by the rotation of the rotary hoist blades 21 and 210 inside the drying tank 11 is not impaired.

さらに、受止板30の面は、回転巻上羽根210の回転方向と対向する角度が直角ではなく、薄膜状の被乾燥物に対して斜めにぶつかる角度であるため、被乾燥物を軸心に向けて逃がすことができ、各回転巻上羽根210の内側より下方へ円滑に落下させることができる。なお、乾燥が完了した被乾燥物は、電動モータ18の駆動を停止した後、乾燥槽11の底板15付近にある排出口から外部に取り出すことができる。   Furthermore, the angle of the surface of the receiving plate 30 facing the rotational direction of the rotary hoist blade 210 is not a right angle but an angle that strikes the thin film-like object to be slanted. And can be smoothly dropped downward from the inside of each rotary hoist blade 210. In addition, the to-be-dried object which completed drying can be taken out from the discharge port near the baseplate 15 of the drying tank 11 after driving of the electric motor 18 is stopped.

次に、図11を参照して第2実施の形態を説明する。
本実施の形態に係る乾燥装置10Aでは、回転軸20の下部に、前記第1実施の形態と同様の構成の最下段の回転巻上羽根21が設けられていると共に、その上部に、前記第1実施の形態と同様の構成の他の回転巻上羽根210が計4段に設けられている。この上下の段数は、乾燥槽11の高さや寸法に応じて計6段以上としても良く、適宜変更し得る設計事項である。
Next, a second embodiment will be described with reference to FIG.
In the drying apparatus 10A according to the present embodiment, the lowermost rotary hoist blade 21 having the same configuration as that of the first embodiment is provided at the lower part of the rotating shaft 20, and the upper part is provided with the first Other rotating hoist blades 210 having the same configuration as that of the first embodiment are provided in a total of four stages. The number of upper and lower steps may be a total of six or more depending on the height and dimensions of the drying tank 11, and is a design matter that can be changed as appropriate.

各段の回転巻上羽根21,210における上下間のクリアランスFと、上下間の基羽根22,220の相対的な配置については、前記第1実施の形態と同様であり、重複した説明は省略する。本実施の形態では、乾燥槽11の底板15付近の壁面に供給管16を接続して、被乾燥物を供給スクリュー16aにより乾燥槽11内の底部に供給する一方、伝熱面12の上蓋14付近の壁面に排出管17を接続して、乾燥済みの被乾燥物を排出スクリュー17aによって外部に排出するように構成している。   The relative clearance F between the upper and lower clearances F and the upper and lower base blades 22 and 220 in the rotating upper and lower blades 21 and 210 of each stage is the same as in the first embodiment, and redundant description is omitted. To do. In the present embodiment, a supply pipe 16 is connected to the wall surface near the bottom plate 15 of the drying tank 11, and an object to be dried is supplied to the bottom of the drying tank 11 by the supply screw 16 a, while the upper cover 14 of the heat transfer surface 12. A discharge pipe 17 is connected to a nearby wall surface, and the dried object to be dried is discharged to the outside by a discharge screw 17a.

このような乾燥装置10Aにおいては、被乾燥物の供給を区切って、間欠的に乾燥物を得るバッチ式の処理を行うようにしても良いし、被乾燥物を連続的に供給すると共に、乾燥物を連続的に排出する連続式の処理も可能となる。なお、本実施の形態では、連続式の処理を行うことも前提としており、前記受止板30は省かれている。また、第1実施の形態と同種の部位については、同一符号を付して重複した説明を省略する。   In such a drying apparatus 10A, the supply of the material to be dried may be divided to perform batch-type processing for obtaining the dried material intermittently, or the material to be dried may be continuously supplied and dried. It is also possible to perform a continuous process for continuously discharging objects. In this embodiment, it is also assumed that continuous processing is performed, and the receiving plate 30 is omitted. Moreover, about the site | part of the same kind as 1st Embodiment, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

次に、図12〜図18を参照して第3実施の形態を説明する。
本実施の形態に係る乾燥装置10Bは、図12に示すように、回転軸20の下部に、前記第1実施の形態とは異なる構成の最下段の回転巻上羽根31が設けられ、その上方に、さらに異なる構成の回転巻上羽根310が4段に設けられて多段構成とされている。なお、乾燥槽11、伝熱面12、ジャケット13等の他の構成は、前記第1実施の形態と同様であり、第1実施の形態と同種の部位については、同一符号を付して重複した説明を省略する。
Next, a third embodiment will be described with reference to FIGS.
As shown in FIG. 12, the drying apparatus 10 </ b> B according to the present embodiment is provided with a lowermost rotary winding blade 31 having a configuration different from that of the first embodiment at the lower part of the rotary shaft 20, and above that Further, the rotary hoist blades 310 having different configurations are provided in four stages to form a multistage configuration. The other configurations such as the drying tank 11, the heat transfer surface 12, and the jacket 13 are the same as those in the first embodiment, and the same parts as those in the first embodiment are denoted by the same reference numerals and overlapped. The description that has been made will be omitted.

前記回転巻上羽根31,310は、それぞれ回転軸20を中心に円周方向に並ぶように配された複数の基羽根32,320から成り、本実施の形態では何れも6枚の基羽根32,320を備えて成る。最下段の回転巻上羽根31と、他の段の回転巻上羽根310とでは、それぞれ基羽根32,320の長さが異なる。すなわち、最下段の回転巻上羽根31の基羽根32は、他の段の回転巻上羽根310の基羽根320よりも長く形成されている。   The rotary hoisting blades 31 and 310 are each composed of a plurality of base blades 32 and 320 arranged in a circumferential direction around the rotation shaft 20, and in this embodiment, each of the six base blades 32. , 320. The lengths of the base blades 32 and 320 are different between the lowermost rotary hoist blade 31 and the other upper rotary hoist blade 310. That is, the base blade 32 of the lowermost rotary hoisting blade 31 is formed longer than the base blade 320 of the other upper rotary hoisting blade 310.

図13および図14に示すように、最下段の回転巻上羽根31の各基羽根32は、それぞれ回転軸20に放射状に固定された計6本の取付アーム34の先端に、それぞれ基羽根32は等間隔に並ぶように設けられている。各基羽根32は、それぞれ同一形状であり、平面視でそれぞれが円周方向に短く延び、被乾燥物を一端部32aから載せて他端部32bに移動させつつ巻き上げ可能な平坦面33を有している。   As shown in FIGS. 13 and 14, the base blades 32 of the lowermost rotary winding upper blade 31 are respectively attached to the tips of a total of six attachment arms 34 that are radially fixed to the rotary shaft 20. Are arranged at equal intervals. Each of the base blades 32 has the same shape, and each has a flat surface 33 that can be rolled up while the object to be dried is placed on the one end portion 32a and moved to the other end portion 32b in plan view. doing.

各基羽根32の平坦面33は、回転方向Rと逆方向に向かって、一端部32aから他端部32bにかけて斜め上方に延びるように形成され、被乾燥物を各基羽根32上に載せて巻き上げつつ、遠心力によって前記伝熱面12に押し付け、被乾燥物を乾燥させるように構成されている。   The flat surface 33 of each base blade 32 is formed so as to extend obliquely upward from one end portion 32a to the other end portion 32b in the direction opposite to the rotation direction R, and an object to be dried is placed on each base blade 32. While winding up, it is configured to press against the heat transfer surface 12 by centrifugal force to dry the material to be dried.

各基羽根32の長さは、平面視で360度の円周範囲内であり、それぞれの他端部32bが、回転方向Rと逆方向に隣り合う他の基羽根32の一端部32aよりも高く位置し平面視で重なるように設定されている。なお、基羽根32と取付アーム34も一体成形されたものであり、前記回転巻上羽根21と同様に、一枚の金属板を裁断して曲げ加工して構成されている。   The length of each base blade 32 is in a circumferential range of 360 degrees in plan view, and each other end portion 32b is more than one end portion 32a of another base blade 32 adjacent in the direction opposite to the rotation direction R. It is set so as to be positioned high and overlap in plan view. The base blade 32 and the mounting arm 34 are also integrally formed, and, like the rotary hoist blade 21, is configured by cutting and bending a single metal plate.

図15および図16に示すように、最下段以外の他の段の回転巻上羽根310の各基羽根320は、小円板部340aの外周から放射状に延びた取付アーム340の先端に連結されている。小円板部340aには、前記回転軸20が通され、回転軸20に固定するための円形貫通孔が形成されている。取付アーム340は、各基羽根320の数に合わせて6本設けられており、それぞれ前記回転軸20の軸方向と直交する平面上に展開するように配され、それぞれの先端が前記基羽根320の一端部320aに一体に連結している。   As shown in FIGS. 15 and 16, each base blade 320 of the rotary hoist blade 310 other than the lowest step is connected to the tip of the mounting arm 340 extending radially from the outer periphery of the small disk portion 340a. ing. The small disc portion 340 a is formed with a circular through hole through which the rotating shaft 20 is passed and fixed to the rotating shaft 20. Six attachment arms 340 are provided in accordance with the number of base blades 320, and are arranged so as to expand on a plane orthogonal to the axial direction of the rotary shaft 20. Are integrally connected to one end 320a of the.

各基羽根320は、それぞれ同一形状であり、平面視でそれぞれが円周方向に短く延び、被乾燥物を一端部320aから載せて他端部320bに移動させつつ巻き上げ可能な平坦面330を有している。各基羽根320の平坦面330も、回転方向Rと逆方向に向かって、一端部320aから他端部320bにかけて斜め上方に延びるように形成され、被乾燥物を各基羽根320上に載せて巻き上げつつ、遠心力によって前記伝熱面12に押し付け、被乾燥物を乾燥させるように構成されている。   Each of the base blades 320 has the same shape, and each has a flat surface 330 that can be rolled up while being moved from the one end part 320a to the other end part 320b while extending in the circumferential direction in a plan view. doing. The flat surface 330 of each base blade 320 is also formed so as to extend obliquely upward from the one end portion 320a to the other end portion 320b in the direction opposite to the rotation direction R, and an object to be dried is placed on each base blade 320. While winding up, it is configured to press against the heat transfer surface 12 by centrifugal force to dry the material to be dried.

各基羽根320の長さは、平面視で360度の円周範囲内であり、かつ隣り合う基羽根320同士の平坦面330が一端部320aから他端部320bにかけて円周方向に互いに重ならないように設定されている。なお、各基羽根320と取付アーム340や小円板部340aも、一体成形されたものであり、前記回転巻上羽根210と同様に、一枚の金属板を裁断して曲げ加工して構成されている。   The lengths of the respective base blades 320 are within a circumferential range of 360 degrees in plan view, and the flat surfaces 330 of the adjacent base blades 320 do not overlap each other in the circumferential direction from the one end portion 320a to the other end portion 320b. Is set to Each base blade 320, the mounting arm 340, and the small disk portion 340a are also integrally formed, and similarly to the rotary hoist blade 210, a single metal plate is cut and bent. Has been.

本実施の形態では、何れの基羽根32,320も、前記基羽根22,220よりも短く形成されている。このように基羽根32,320は長さが短い分、高さも抑えられており、前記基羽根22,220に比べて上下方向に嵩張らず、段数を多くしても、乾燥槽11の全高をなるべく抑えることができる。なお、基羽根32,320は、前述した6枚に限られるものではなく、その数や具体的な長さや横幅の寸法も、適宜定め得る設計事項である。   In the present embodiment, both base blades 32 and 320 are formed shorter than the base blades 22 and 220. Thus, the height of the base blades 32 and 320 is reduced by the short length, and is not bulky in the vertical direction as compared with the base blades 22 and 220. Even if the number of stages is increased, the total height of the drying tank 11 is increased. It can be suppressed as much as possible. In addition, the base blades 32 and 320 are not limited to the six sheets described above, and the number, specific length, and width dimensions are design matters that can be appropriately determined.

本実施の形態においても、図12に示すように、各段の回転巻上羽根31,310における上下間のクリアランスFが重要となる。このクリアランスFの値は、前記各実施の形態と同様に、回転巻上羽根31,310の直径の0〜15%となる比率とすることで、最下段の回転巻上羽根31から最上段の回転巻上羽根310に亘り、各段ごとに被乾燥物を均一な薄膜状に伝熱面12に押し付ける乾燥工程が連続して順次繰り返されることになる。   Also in the present embodiment, as shown in FIG. 12, the clearance F between the upper and lower portions of the rotary upper and lower blades 31 and 310 at each stage is important. The value of the clearance F is set to a ratio of 0 to 15% of the diameter of the rotary winding upper blades 31 and 310, as in the above-described embodiments, so that the lowermost rotary winding blade 31 is the uppermost stage. The drying process of pressing the material to be dried on the heat transfer surface 12 in a uniform thin film for each stage is continuously and sequentially repeated over the rotating upper blade 310.

また、図17および図18に示すように、各段の回転巻上羽根31,310における上下間の基羽根32,320の相対的な配置も、前記各実施の形態と同様に、平面視で所定角度ずつ位相がずれて、回転方向Rと逆方向に延びる多重(本実施の形態では6重)の螺旋階段状に並ぶように配設されている。このような特別な配置により、乾燥槽11内壁の縦方向における伝熱面12全面を有効に活用することが可能となり、縦型の利点を生かした非常に高い乾燥効率を確実に実現することができる。   As shown in FIGS. 17 and 18, the relative arrangement of the base blades 32 and 320 between the upper and lower portions of the rotary winding upper and lower blades 31 and 310 of each stage is also similar to that in each of the above embodiments in a plan view. Phases are shifted by a predetermined angle, and arranged in a multiple (in this embodiment, six layers) spiral staircase extending in the direction opposite to the rotation direction R. Such a special arrangement makes it possible to effectively utilize the entire heat transfer surface 12 in the vertical direction of the inner wall of the drying tank 11, and to reliably realize very high drying efficiency by taking advantage of the vertical type. it can.

以上、本発明の実施の形態を図面によって説明してきたが、具体的な構成はこれらの実施の形態に限られるものではなく、本発明の要旨を逸脱しない範囲における変更や追加があっても本発明に含まれる。例えば、各基羽根22,220は、回転軸20に放射状に固定した取付アーム24,240の先端に一端部22a,220aが連結されているが、他端部22b,220bも、同じく回転軸20に放射状に固定した支持アームの先端に連結するように構成すれば、十分な支持強度も得ることができる。   As described above, the embodiments of the present invention have been described with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the present invention can be modified or added without departing from the scope of the present invention. Included in the invention. For example, each base blade 22, 220 has one end 22 a, 220 a connected to the tip of a mounting arm 24, 240 radially fixed to the rotary shaft 20, but the other end 22 b, 220 b is also the rotary shaft 20. Sufficient support strength can be obtained by connecting to the tip of the support arm fixed radially.

また、前記各実施の形態では、最下段の回転巻上羽根21,31を除く他の段の回転巻上羽根210,310では、何れも同一形状、同一傾斜度の複数の基羽根220,320により構成されているが、必要に応じ、これらを異なるものにしても良い。例えば、回転巻上羽根21,31と回転巻上羽根210,310とを、最下段から順に交互に並ぶように配設しても良い。   In each of the above embodiments, the rotating hoist blades 210 and 310 of the other stages other than the lowermost rotating hoist blades 21 and 31 are a plurality of base blades 220 and 320 having the same shape and the same inclination. However, if necessary, these may be different. For example, the rotary hoist blades 21 and 31 and the rotary hoist blades 210 and 310 may be arranged alternately in order from the bottom.

本発明の乾燥装置においては、液状のものを含む種々様々な被乾燥物に対応可能であり、特に、固形物や半固形物を含む被乾燥物や粘性の強い被乾燥物であっても、効率良く乾燥させることが可能な乾燥装置として幅広く利用することができる。   In the drying apparatus of the present invention, it is possible to deal with a wide variety of to-be-dried items including liquid ones, and in particular, even to-be-dried items including solids and semi-solids and highly viscous items to be dried, It can be widely used as a drying apparatus that can be efficiently dried.

10…乾燥装置
10A…乾燥装置
10B…乾燥装置
11…乾燥槽
11A…乾燥槽
11B…乾燥槽
12…伝熱面
13…ジャケット
13a…蒸気流入部
13b…蒸気排出部
14…上蓋
15…底板
16…供給管
16a…供給スクリュー
17…排出管
17a…排出スクリュー
18…電動モータ
19…熱風導入部
20…回転軸
21…回転巻上羽根
22…基羽根
23…平坦面
24…取付アーム
30…受止板
31…回転巻上羽根
32…基羽根
33…平坦面
34…取付アーム
210…回転巻上羽根
220…基羽根
230…平坦面
240…取付アーム
310…回転巻上羽根
320…基羽根
330…平坦面
340…取付アーム
DESCRIPTION OF SYMBOLS 10 ... Drying apparatus 10A ... Drying apparatus 10B ... Drying apparatus 11 ... Drying tank 11A ... Drying tank 11B ... Drying tank 12 ... Heat-transfer surface 13 ... Jacket 13a ... Steam inflow part 13b ... Steam discharge part 14 ... Top cover 15 ... Bottom plate 16 ... Supply pipe 16a ... Supply screw 17 ... Discharge pipe 17a ... Discharge screw 18 ... Electric motor 19 ... Hot air introduction part 20 ... Rotating shaft 21 ... Rotating winding upper blade 22 ... Base blade 23 ... Flat surface 24 ... Mounting arm 30 ... Receiving plate 31 ... Rotary winding upper blade 32 ... Base blade 33 ... Flat surface 34 ... Mounting arm 210 ... Rotary winding upper blade 220 ... Base blade 230 ... Flat surface 240 ... Mounting arm 310 ... Rotary winding upper blade 320 ... Base blade 330 ... Flat surface 340 ... Mounting arm

Claims (7)

被乾燥物が投入される縦型円筒形状の乾燥槽と、前記乾燥槽内中心部に設けた縦方向に延びる回転軸に取り付けた回転巻上羽根と、を有する乾燥装置において、
前記回転巻上羽根は、前記回転軸を中心に円周方向に並ぶように配された複数の基羽根から成り、各基羽根は、平面視でそれぞれが円周方向に延び、被乾燥物をそれぞれの一端部から載せて他端部に移動させつつ巻き上げ可能な平坦面を有し、この平坦面は、回転方向と逆方向に向かい一端部から他端部にかけて斜め上方に延びるように形成され、
前記回転巻上羽根は、前記回転軸の回転に伴って被乾燥物を、各基羽根の平坦面上に載せて一端部から他端部へと巻き上げつつ、遠心力により前記乾燥槽内壁に薄膜状に押し付け、かつ該内壁に沿って連続して上昇させ、
被乾燥物が上昇する過程で、前記乾燥槽内に外部から熱風を導入して、該熱風を被乾燥物の薄膜状の内周側に吹き付けることにより、該内周側より被乾燥物を加熱して水分蒸発を推進させることを特徴とする乾燥装置。
In a drying apparatus having a vertical cylindrical drying tank into which an object to be dried is charged, and a rotating upper blade attached to a rotating shaft extending in the vertical direction provided in the center of the drying tank,
The rotary hoisting blade is composed of a plurality of base blades arranged so as to be arranged in the circumferential direction around the rotation axis, and each base blade extends in the circumferential direction in plan view, Each flat surface has a flat surface that can be rolled up while being moved from one end portion to the other end portion, and this flat surface is formed to extend obliquely upward from one end portion to the other end portion in the direction opposite to the rotation direction. ,
The rotating hoist blades are thinned on the inner wall of the drying tank by centrifugal force while winding an object to be dried on the flat surface of each base blade as the rotating shaft rotates, from one end to the other end. And continuously rising along the inner wall,
In the process of raising the object to be dried, hot air is introduced from the outside into the drying tank, and the hot air is blown to the inner peripheral side of the thin film of the object to be dried, thereby heating the object to be dried from the inner peripheral side. A drying apparatus characterized by promoting moisture evaporation.
被乾燥物が投入される縦型円筒形状の乾燥槽と、前記乾燥槽内壁を加熱する加熱手段と、前記乾燥槽内中心部に設けた縦方向に延びる回転軸に取り付けた回転巻上羽根と、を有する乾燥装置において、
前記回転巻上羽根は、前記回転軸を中心に円周方向に並ぶように配された複数の基羽根から成り、各基羽根は、平面視でそれぞれが円周方向に延び、被乾燥物をそれぞれの一端部から載せて他端部に移動させつつ巻き上げ可能な平坦面を有し、この平坦面は、回転方向と逆方向に向かい一端部から他端部にかけて斜め上方に延びるように形成され、
前記回転巻上羽根は、前記回転軸の回転に伴って被乾燥物を、各基羽根の平坦面上に載せて一端部から他端部へと巻き上げつつ、遠心力により前記乾燥槽内壁に薄膜状に押し付け、かつ該内壁に沿って連続して上昇させ、
被乾燥物が上昇する過程で、前記乾燥槽内壁より加熱されて含水率の低くなった被乾燥物が薄膜状の内周側の蒸発面に移動しつつ水分蒸発が推進され、加えて前記乾燥槽内に外部から熱風を導入して、該熱風を被乾燥物の薄膜状の内周側に吹き付けることにより、該内周側からも被乾燥物を加熱して前記蒸発面における水分蒸発を促進させることを特徴とする乾燥装置。
A vertical cylindrical drying tank into which an object to be dried is charged, a heating means for heating the inner wall of the drying tank, and a rotary hoisting blade attached to a rotary shaft extending in the vertical direction provided at the center of the drying tank In a drying apparatus having
The rotary hoisting blade is composed of a plurality of base blades arranged so as to be arranged in the circumferential direction around the rotation axis, and each base blade extends in the circumferential direction in plan view, Each flat surface has a flat surface that can be rolled up while being moved from one end portion to the other end portion, and this flat surface is formed to extend obliquely upward from one end portion to the other end portion in the direction opposite to the rotation direction. ,
The rotating hoist blades are thinned on the inner wall of the drying tank by centrifugal force while winding an object to be dried on the flat surface of each base blade as the rotating shaft rotates, from one end to the other end. And continuously rising along the inner wall,
In the process of raising the object to be dried, moisture evaporation is promoted while the object to be dried which has been heated from the inner wall of the drying tank and has a low moisture content moves to the evaporation surface on the inner peripheral side of the thin film, and in addition to the drying Hot air is introduced into the tank from the outside, and the hot air is blown onto the thin film inner peripheral side of the object to be dried, so that the object to be dried is also heated from the inner peripheral side to promote moisture evaporation on the evaporation surface. A drying device characterized in that
前記熱風は、前記乾燥槽の底部において中心側より側方に向けて吹き出され、前記回転巻上羽根の回転より生じる気流と遠心力により渦巻き状になって上昇しつつ、前記被乾燥物の薄膜状の内周側に吹き付けられることを特徴とする請求項1または2に記載の乾燥装置。   The hot air is blown out from the center side to the side at the bottom of the drying tank, and rises in a spiral shape by the air current and centrifugal force generated by the rotation of the rotating upper blade, while the thin film of the object to be dried The drying apparatus according to claim 1, wherein the drying apparatus is sprayed on an inner peripheral side of the shape. 前記乾燥工程中に前記乾燥槽内で発生する廃ガスを導いて燃焼させ無害化する燃焼炉を備え、
前記燃焼炉における燃焼で生じた熱風を、前記乾燥工程中の前記乾燥槽内に導入することを特徴とする請求項1,2または3に記載の乾燥装置。
A combustion furnace for detoxifying the waste gas generated in the drying tank during the drying step,
The drying apparatus according to claim 1, 2 or 3, wherein hot air generated by combustion in the combustion furnace is introduced into the drying tank in the drying step.
前記回転巻上羽根は、前記回転軸に沿って上下に並ぶ複数段に配設され、
複数段の回転巻上羽根は、前記回転軸に沿って並ぶ上下間において、それぞれの各基羽根が平面視で所定角度ずつ位相がずれ、回転方向と逆方向に延びる多重螺旋階段状に並ぶように配設され、最下段の回転巻上羽根から最上段の回転巻上羽根まで前記乾燥工程が連続して順次繰り返されるように設定され、
前記回転巻上羽根の各基羽根の平坦面は、平面視で360度の円周範囲内の長さで細幅形状に延び、かつ最下段を除く他の段の回転巻上羽根における各基羽根の平坦面は、平面視で同一円周上に並ぶ隣り合う基羽根同士の平坦面が円周方向に互いに重ならない長さに設定され、
複数段の回転巻上羽根において、上下に並ぶそれぞれの各基羽根は、下方の基羽根の他端部に対して、回転方向と逆方向の間近に位置する上方の基羽根の一端部が、平面視で重ならずに前記逆方向に離隔し、前記下方の基羽根の他端部における平坦面を延長した傾斜面より下方に位置しつつ前記多重螺旋階段状に並ぶことを特徴とする請求項1,2,3または4に記載の乾燥装置。
The rotary winding upper blade is arranged in a plurality of stages arranged vertically along the rotation axis,
The multiple stages of rotating hoist blades are arranged in multiple spiral steps extending in the direction opposite to the rotational direction, with the respective base blades being out of phase by a predetermined angle in plan view between the upper and lower sides arranged along the rotational axis. Is set so that the drying process is repeated successively and sequentially from the lowermost rotating upper blade to the uppermost rotating upper blade,
The flat surface of each base blade of the rotary hoisting blade extends in a narrow shape with a length in a circumferential range of 360 degrees in plan view, and each base in the rotary hoisting blades of the other stages other than the lowermost stage. The flat surface of the blade is set to a length such that the flat surfaces of adjacent base blades arranged on the same circumference in plan view do not overlap each other in the circumferential direction,
In each of the multiple stages of the rotating upper and lower blades, each of the base blades arranged in the vertical direction has one end portion of the upper base blade positioned close to the rotation direction opposite to the other end portion of the lower base blade, The two or more spiral staircases are arranged in a plurality of spiral staircases spaced apart in the opposite direction without overlapping in a plan view and positioned below an inclined surface extending a flat surface at the other end of the lower base blade. Item 5. A drying apparatus according to item 1, 2, 3, or 4.
複数段の回転巻上羽根の上下間のクリアランスは、回転巻上羽根の各基羽根の他端部最上端からその一段上の回転巻上羽根の各基羽根の一端部最下端までの寸法が、各基羽根の平坦面の最外周端を結ぶ円直径の0〜15%となる比率として、最下段の回転巻上羽根から最上段の回転巻上羽根まで前記乾燥工程が連続して順次繰り返されるように設定したことを特徴とする請求項5に記載の乾燥装置。   The clearance between the upper and lower sides of the multi-stage rotating hoist blades is the dimension from the uppermost end of the other end of each base vane of the rotating hoisting blade to the lowermost end of each base vane of the upper hoisting blade The drying step is repeated successively from the lowermost rotating upper blade to the uppermost rotating upper blade as a ratio of 0 to 15% of the circle diameter connecting the outermost peripheral ends of the flat surfaces of the base blades. The drying apparatus according to claim 5, wherein the drying apparatus is set so as to be 最上段の回転巻上羽根の上方に、前記乾燥槽内壁に設けられ、前記最上段の回転巻上羽根より上方に向かう薄膜状の被乾燥物を受け止めて、回転巻上羽根の内側より下方へ落下させる受止板を配設し、
前記受止板は、その面が前記回転巻上羽根の回転方向と対向するように配される板状の部材から成り、2以上が円周方向に並ぶように配されることを特徴とする請求項5または6に記載の乾燥装置。
A thin film-like object to be dried is provided on the inner wall of the drying tank above the uppermost rotary hoisting blade, and is directed downward from the inner side of the upper hoisting upper blade. Arrange the receiving plate to drop,
The receiving plate is composed of a plate-like member whose surface is arranged to face the rotation direction of the rotary hoist blade, and two or more are arranged in a circumferential direction. The drying apparatus according to claim 5 or 6.
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Publication number Priority date Publication date Assignee Title
CN110665596A (en) * 2019-11-20 2020-01-10 姜玉兰 Novel drying device
CN111391170A (en) * 2020-04-09 2020-07-10 何清城 Screw-type dispersion dryer for new material color master batches
CN114431578A (en) * 2022-03-08 2022-05-06 温州黑马鞋业有限公司 Special shoe making device and process for processing leather shoes
CN115654899A (en) * 2022-11-11 2023-01-31 洛阳融惠化工科技有限公司 Shutter type moving bed drying equipment and drying method thereof

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JP6679193B1 (en) * 2019-02-25 2020-04-15 祐次 高橋 Dryer
CN110906727B (en) * 2019-12-04 2021-05-04 湖南慕她生物科技发展有限公司 Lily spices processing is with dehydration drying device
JP7244705B1 (en) * 2022-09-22 2023-03-22 祐次 高橋 drying equipment

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Publication number Priority date Publication date Assignee Title
CN110665596A (en) * 2019-11-20 2020-01-10 姜玉兰 Novel drying device
CN110665596B (en) * 2019-11-20 2024-04-23 姜玉兰 Drying device
CN111391170A (en) * 2020-04-09 2020-07-10 何清城 Screw-type dispersion dryer for new material color master batches
CN114431578A (en) * 2022-03-08 2022-05-06 温州黑马鞋业有限公司 Special shoe making device and process for processing leather shoes
CN114431578B (en) * 2022-03-08 2023-12-26 温州黑马鞋业有限公司 Special shoe making device and process for processing leather shoes
CN115654899A (en) * 2022-11-11 2023-01-31 洛阳融惠化工科技有限公司 Shutter type moving bed drying equipment and drying method thereof

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