JP2006322684A - Dryer - Google Patents

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JP2006322684A
JP2006322684A JP2005147932A JP2005147932A JP2006322684A JP 2006322684 A JP2006322684 A JP 2006322684A JP 2005147932 A JP2005147932 A JP 2005147932A JP 2005147932 A JP2005147932 A JP 2005147932A JP 2006322684 A JP2006322684 A JP 2006322684A
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side wall
dried
stirring blade
cylindrical body
rotating shaft
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JP4476871B2 (en
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Hisayoshi Yasuno
久喜 安野
Osamu Hosokawa
修 細川
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Mitsubishi Materials Techno Corp
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Mitsubishi Materials Techno Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a dryer improved in drying efficiency of a drying object by preventing the supplied drying object from sticking in a lump to agitation blades. <P>SOLUTION: The dryer comprises a fixed body 2 having cylindrical bodies 13 provided with sidewalls, at both ends, and a rotating shaft 3 having a plurality of agitation blades 22 continuously provided axially in the cylindrical body 13, and rotatably inserted through the fixed body 2. The fixed body 2 is provided with fixed plates 14 projected from the inner peripheral surface of the cylindrical body 13, between the agitation blade 22A and the sidewall 11, and the drying object supplied into the cylindrical body 13 is agitated and dried while being transferred axially in the rotating body 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、例えば食品の残渣物や水処理装置から発生する有機物を成分とする処理物などを乾燥する乾燥装置に関する。   The present invention relates to a drying apparatus for drying, for example, a food residue or a processed product containing an organic substance generated from a water processing apparatus.

一般に、食品の残渣物や水処理装置から発生する有機物を成分とする処理物は、内部に含有されている水分などを蒸発させ、減量や再利用されている。ここで、蒸発させるために処理物に直接熱風を吹き当てることで乾燥させる直接乾燥法や、熱風などの熱媒によって容器などの接触部材を加熱して加熱された接触部材を処理物と接触させることで処理物に直接熱媒を当てずに乾燥させる間接乾燥法がある。   In general, a processed product containing as a component a food residue or an organic substance generated from a water treatment apparatus is evaporated or reduced in weight and reused. Here, a direct drying method in which hot air is blown directly on the processed material to evaporate, or a contact member such as a container is heated by a heating medium such as hot air to bring the heated contact member into contact with the processed material. Therefore, there is an indirect drying method in which the processed material is dried without directly applying a heat medium.

このような間接乾燥法を採用した乾燥装置として、両端に側壁が設けられた筒状体を有する固定体と、この固定体に対して回転自在に挿通された回転軸とを備える乾燥装置が提案されている（例えば、特許文献１参照）。ここで、回転軸には攪拌羽根が複数連設されており、各攪拌羽根は、熱媒によって加熱されている。そして、筒状体の内部に供給された被乾燥物を複数の攪拌羽根で攪拌、乾燥させながら移送する。このとき、攪拌羽根を複数設けることで被乾燥物との接触面積が増大して効率よく被乾燥物を乾燥させることができる。
被乾燥物は、乾燥される途中で、被乾燥物中の水分量によっては高い粘性を有する状態となることがある。粘性の高い状態にある被乾燥物は、攪拌羽根に付着して固化することで攪拌羽根による被乾燥物の攪拌や移送を行いにくくし、被乾燥物の乾燥効率を劣化させることがある。
そこで、筒状体の内周面から複数の攪拌羽根の間に向けて突出するように固定板が設けられた乾燥装置が提案されている。固定板を設けることで、攪拌羽根に付着した被乾燥物を掻き取り、被乾燥物が攪拌羽根に付着して固化することを抑制し、被乾燥物の乾燥効率を維持することができる。
特開２００２−２５０５９０号公報 As a drying apparatus employing such an indirect drying method, a drying apparatus having a fixed body having a cylindrical body with side walls provided at both ends and a rotating shaft that is rotatably inserted into the fixed body is proposed. (For example, refer to Patent Document 1). Here, a plurality of stirring blades are connected to the rotating shaft, and each stirring blade is heated by a heat medium. And the to-be-dried material supplied to the inside of a cylindrical body is conveyed, stirring and drying with a some stirring blade. At this time, by providing a plurality of stirring blades, the contact area with the material to be dried increases, and the material to be dried can be efficiently dried.
The material to be dried may be in a state of having high viscosity depending on the amount of water in the material to be dried while being dried. The object to be dried in a highly viscous state adheres to the stirring blade and solidifies, thereby making it difficult to stir and transfer the object to be dried by the stirring blade, and may deteriorate the drying efficiency of the object to be dried.
Therefore, a drying apparatus has been proposed in which a fixing plate is provided so as to protrude from the inner peripheral surface of the cylindrical body toward a plurality of stirring blades. By providing the fixing plate, the object to be dried attached to the stirring blade is scraped off, and the object to be dried is prevented from adhering to the stirring blade and solidified, and the drying efficiency of the object to be dried can be maintained.
JP 2002-250590 A

しかしながら、上記従来の乾燥装置には、以下の課題が残されている。すなわち、上記従来の乾燥装置では、複数の攪拌羽根のうち一方の側壁に近接して配置された１つの一方の側壁側の面に被乾燥物が付着、固化することがある。そして、この攪拌羽根に付着、固化した被乾燥物に対して新たに被乾燥物が付着、固化することで成長して塊となり、乾燥装置による被乾燥物の乾燥効率が低下するという問題がある。   However, the following problems remain in the conventional drying apparatus. That is, in the above conventional drying apparatus, the material to be dried may adhere to and solidify on the surface on one side wall side that is arranged close to one side wall among the plurality of stirring blades. And there is a problem that the drying object newly grows and becomes a lump when the drying object newly adheres and solidifies with respect to the drying object adhered and solidified on the stirring blade, and the drying efficiency of the drying object by the drying device is lowered. .

本発明は、前述の課題に鑑みてなされたもので、供給された被乾燥物が塊となって攪拌羽根に付着することを防止し、被乾燥物の乾燥効率を向上させた乾燥装置を提供することを目的とする。   The present invention has been made in view of the above-described problems, and provides a drying apparatus that prevents the supplied material to be dried from clumping and adhering to the stirring blade, and improving the drying efficiency of the material to be dried. The purpose is to do.

本発明は、前記課題を解決するために以下の構成を採用した。すなわち、本発明の乾燥装置は、両端に側壁が設けられた筒状体を有する固定体と、該筒状体の軸方向に連設された複数の攪拌羽根を有して前記固定体に回転自在に挿通される回転軸とを備え、前記筒状体内に供給された前記被乾燥物を、前記回転体の軸方向に移送しながら攪拌、乾燥させる乾燥装置において、前記固定体が、複数の前記攪拌羽根のうち前記一方の側壁に近接して配置されている第１攪拌羽根と前記一方の側壁との間に、前記筒状体の内周面から突出する固定板が設けられていることを特徴とする。   The present invention employs the following configuration in order to solve the above problems. That is, the drying apparatus of the present invention has a fixed body having a cylindrical body with side walls provided at both ends, and a plurality of stirring blades connected in the axial direction of the cylindrical body, and rotates to the fixed body. In a drying apparatus that includes a rotating shaft that is freely inserted, and that stirs and dries the material to be dried supplied in the cylindrical body in the axial direction of the rotating body. A fixing plate that protrudes from the inner peripheral surface of the cylindrical body is provided between a first stirring blade that is disposed close to the one side wall of the stirring blades and the one side wall. It is characterized by.

この発明によれば、側壁と側壁に近接して配置されている攪拌羽根である第１攪拌羽根との間に固定板が突出して設けられていることで、第１攪拌羽根の一方の側壁側の面に付着している被乾燥物を固定板によって剥離することができる。これにより、第１攪拌羽根の一方の側壁側の面に被乾燥物が付着、固化することや固化した被乾燥物に対して被乾燥物が付着して固化した被乾燥物が成長することを防止することができる。したがって、第１攪拌羽根と一方の側壁との間に被乾燥物を供給したときに、被乾燥物が第１攪拌羽根と一方の側壁との間に停滞しにくくなり、他方の側壁に向けて被乾燥物を攪拌、乾燥させながら移動することが容易となる。そして、乾燥効率を向上させることができる。   According to this invention, since the fixing plate protrudes and is provided between the side wall and the first stirring blade that is the stirring blade disposed close to the side wall, the one side of the first stirring blade The object to be dried adhered to the surface can be peeled off by the fixing plate. Thereby, to-be-dried material adheres and solidifies on the surface of one side wall of the first stirring blade, and the to-be-dried material adheres to the solidified to-be-dried material and the to-be-dried material grows. Can be prevented. Therefore, when the material to be dried is supplied between the first stirring blade and the one side wall, the material to be dried is less likely to stay between the first stirring blade and the one side wall, and toward the other side wall. It becomes easy to move the material to be dried while stirring and drying. And drying efficiency can be improved.

また、本発明の乾燥装置は、前記回転軸が、前記一方の側壁と前記第１攪拌羽根との間に傾斜部材を備え、該傾斜部材の外形が、前記第１攪拌羽根に向けて漸次縮径するように形成されていることが好ましい。
この発明によれば、一方の側壁と第１攪拌羽根との間に位置する被乾燥物を、第１攪拌羽根に向けて送り流す。これにより、一方の側壁と第１攪拌羽根との間に被乾燥物が停滞することを抑制し、乾燥効率を向上させることができる。 In the drying apparatus of the present invention, the rotating shaft includes an inclined member between the one side wall and the first stirring blade, and the outer shape of the inclined member is gradually reduced toward the first stirring blade. It is preferable that it is formed to have a diameter.
According to this invention, the to-be-dried material located between one side wall and the 1st stirring blade is sent toward the 1st stirring blade. Thereby, it can suppress that a to-be-dried object stagnates between one side wall and the 1st stirring blade, and can improve drying efficiency.

また、本発明の乾燥装置は、前記回転軸が、前記筒状体の内周面に付着する前記被乾燥物を回転時に掻き取る内周面掻取部材を備えることが好ましい。
この発明によれば、筒状体の内周面に付着する被乾燥物を掻き取ることで、被乾燥物が第１攪拌羽根と一方の側壁との間に留まりにくくし、乾燥効率を向上させることができる。 Moreover, it is preferable that the drying apparatus of this invention is provided with the internal peripheral surface scraping member which the said rotating shaft scrapes off the said to-be-dried object adhering to the internal peripheral surface of the said cylindrical body at the time of rotation.
According to the present invention, the material to be dried attached to the inner peripheral surface of the cylindrical body is scraped off so that the material to be dried is less likely to stay between the first stirring blade and the one side wall, thereby improving the drying efficiency. be able to.

また、本発明の乾燥装置は、前記回転軸が、前記一方の側壁に付着する前記被乾燥物を回転時に掻き取る側壁掻取部材を備えることが好ましい。
この発明によれば、一方の側壁に付着する被乾燥物を掻き取ることで、被乾燥物が第１攪拌羽根と一方の側壁との間に停滞しにくくなり、乾燥効率を向上させることができる。 Moreover, it is preferable that the drying apparatus of this invention is equipped with the side wall scraping member which the said rotating shaft scrapes off the said to-be-dried material adhering to said one side wall at the time of rotation.
According to the present invention, the material to be dried attached to one side wall is scraped off, so that the material to be dried is less likely to stay between the first stirring blade and the one side wall, and the drying efficiency can be improved. .

また、本発明の乾燥装置は、前記側壁掻取部材が、その端辺が前記一方の側壁と間隙を介して配置される板状部材であり、前記側壁掻取部材の前記一方の側壁側の一端が、前記他方の側壁側の一端よりも前記回転軸の回転方向前方に位置するように設けられていることが好ましい。
この発明によれば、側壁掻取部材の回転方向前方の面が回転方向に対して他方の側壁を向くように形成されているので、一方の側壁に付着した被乾燥物が側壁掻取部材によって、他方の側壁に向かって送り出されるように掻き取られる。したがって、一方の側壁と第１攪拌羽根との間に被乾燥物がより停滞することを抑制し、乾燥効率を向上させることができる。 Further, in the drying apparatus of the present invention, the side wall scraping member is a plate-like member whose end side is disposed with a gap between the one side wall and the side wall scraping member on the one side wall side. It is preferable that one end is provided so as to be positioned in front of the other side wall side in the rotation direction of the rotation shaft.
According to the present invention, since the front surface in the rotational direction of the side wall scraping member is formed so as to face the other side wall with respect to the rotational direction, the material to be dried attached to one side wall is separated by the side wall scraping member. And scraped off so as to be sent out toward the other side wall. Therefore, it can suppress that a to-be-dried object stagnates more between one side wall and the 1st stirring blade, and can improve drying efficiency.

この発明にかかる乾燥装置によれば、第１攪拌羽根の一方の側壁側の面に付着している被乾燥物を固定板によって剥離し、被乾燥物が付着、固化して成長することを防止することができる。したがって、被乾燥物が第１攪拌羽根と一方の側壁との間に停滞しにくくなり、他方の側壁に向けて被乾燥物を攪拌、乾燥させながら移動することが容易になると共に、乾燥効率を向上させることができる。   According to the drying apparatus of the present invention, the material to be dried attached to the one side wall surface of the first stirring blade is peeled off by the fixing plate, and the material to be dried is prevented from adhering, solidifying and growing. can do. Therefore, the object to be dried is less likely to stagnate between the first stirring blade and one side wall, and it becomes easy to move the object to be dried while stirring and drying toward the other side wall, and the drying efficiency is improved. Can be improved.

以下、本発明による乾燥装置の一実施形態を図面に基づいて説明する。
本実施形態における乾燥装置１は、間接乾燥法を採用した乾燥装置であって、図１に示すように、中空の固定体２と、固定体２に対して回転自在に挿通された回転軸３とによって構成されている。 Hereinafter, an embodiment of a drying apparatus according to the present invention will be described with reference to the drawings.
The drying device 1 in the present embodiment is a drying device that employs an indirect drying method, and as shown in FIG. 1, a hollow fixed body 2 and a rotary shaft 3 that is rotatably inserted into the fixed body 2. And is composed of.

固定体２は、横置きされて両端に側壁（一方の側壁）１１、側壁（他方の側壁）１２が設けられた筒状体１３と、筒状体１３の外周面を覆うように設けられたジャケット（図示略）とを備えている。
筒状体１３は、断面円筒形状であり、側壁１１側の上面に被乾燥物を供給する被乾燥物導入口１３Ａが設けられており、側壁１２側の下面に筒状体１３内を移送された被乾燥物を排出する被乾燥物排出口１３Ｂが設けられている。被乾燥物導入口１３Ａは側壁１１よりも若干側壁１２側に設けられており、被乾燥物排出口１３Ｂは側壁１２よりも若干側壁１１側に設けられている。
ここで、本明細書の乾燥装置において、筒状体１３の被乾燥物導入口１３Ａが設けられた側の一端を上流端、被乾燥物排出口１３Ｂが設けられた側の一端を下流端と称する。また、筒状体１３には、被乾燥物を加熱することで発生する水蒸気を排気する水分排気口１３Ｃ及び筒状体１３の内部に空気を導入して筒状体１３内部の圧力などを調整する空気導入口１３Ｄが設けられている。
また、筒状体１３には、上側の内周面から回転軸３の軸心に向かって固定板１４が複数設けられている。
複数の固定板１４は、後述する複数の攪拌羽根２２の間と、複数の攪拌羽根２２のうち側壁１１に近接して配置された攪拌羽根２２（以下、攪拌羽根（第１攪拌羽根）２２Ａと称する）及び側壁１１の間とにそれぞれ突出するように設けられている。 The fixed body 2 is provided so as to cover a cylindrical body 13 which is horizontally placed and provided with a side wall (one side wall) 11 and a side wall (the other side wall) 12 at both ends, and an outer peripheral surface of the cylindrical body 13. And a jacket (not shown).
The cylindrical body 13 has a cylindrical cross-section, and is provided with an object to be dried inlet 13A for supplying an object to be dried on the upper surface on the side wall 11 side, and is transferred through the cylindrical body 13 to the lower surface on the side wall 12 side. A to-be-dried object discharge port 13B for discharging the to-be-dried object is provided. The to-be-dried material introduction port 13A is provided slightly on the side wall 12 side from the side wall 11, and the to-be-dried material discharge port 13B is provided on the side wall 11 side slightly from the side wall 12.
Here, in the drying apparatus of the present specification, one end of the cylindrical body 13 on the side provided with the to-be-dried material inlet 13A is an upstream end, and one end on the side on which the to-be-dried material discharge port 13B is provided is a downstream end. Called. Further, the tubular body 13 adjusts the pressure inside the tubular body 13 by introducing air into the moisture exhaust port 13C for exhausting water vapor generated by heating the object to be dried and the tubular body 13. An air inlet 13D is provided.
The cylindrical body 13 is provided with a plurality of fixing plates 14 from the upper inner peripheral surface toward the axis of the rotary shaft 3.
The plurality of fixed plates 14 include a stirring blade 22 (hereinafter referred to as a stirring blade (first stirring blade) 22A) disposed between the plurality of stirring blades 22 described later and the side wall 11 of the plurality of stirring blades 22. And between the side walls 11 so as to protrude from each other.

回転軸３は、回転軸本体２１と、回転軸３の軸方向に連設された複数の攪拌羽根２２とによって構成されており、固定体２の外部に設けられた動力源（図示略）によって、図１に示す矢印Ａ方向で回転自在となっている。
回転軸本体２１は、円筒形状を有しており、固定体２の外部において回転軸本体２１内に熱媒である蒸気を導入するための蒸気導入口２１Ａが設けられている。
複数の攪拌羽根２２は、被乾燥物との接触面積を増大するために設けられており、等間隔で配置されている。また、攪拌羽根２２は、中空の円盤形状を有しており、回転軸本体２１内を流通する蒸気が攪拌羽根２２内にも流通可能なように、中空部が連続するように設けられている。
また、回転軸本体２１には、攪拌羽根２２Ａと側壁１１との間において、傾斜部材２３と傾斜部材２３の上流端に接続された掻取羽根２４とが設けられている。また、回転軸本体２１には、複数の攪拌羽根２２のうち、側壁１２に近接して配置されている攪拌羽根（以下、攪拌羽根２２Ｂと称する）と側壁１２との間に、掻取羽根２５が設けられている。 The rotating shaft 3 includes a rotating shaft main body 21 and a plurality of stirring blades 22 connected in the axial direction of the rotating shaft 3, and is driven by a power source (not shown) provided outside the fixed body 2. 1 is rotatable in the direction of arrow A shown in FIG.
The rotating shaft main body 21 has a cylindrical shape, and a steam introduction port 21 </ b> A for introducing steam as a heat medium into the rotating shaft main body 21 is provided outside the fixed body 2.
The plurality of stirring blades 22 are provided to increase the contact area with the material to be dried, and are arranged at equal intervals. Further, the stirring blade 22 has a hollow disk shape, and is provided so that the hollow portion is continuous so that the steam flowing through the rotating shaft body 21 can also flow through the stirring blade 22. .
Further, the rotary shaft main body 21 is provided with an inclined member 23 and a scraping blade 24 connected to the upstream end of the inclined member 23 between the stirring blade 22A and the side wall 11. Further, the rotary shaft body 21 includes a scraping blade 25 between the stirring blade (hereinafter referred to as stirring blade 22 </ b> B) disposed among the plurality of stirring blades 22 in the vicinity of the side wall 12 and the side wall 12. Is provided.

傾斜部材２３は、回転軸本体２１の周囲に設けられた傾斜部材本体３１と、傾斜部材本体３１の上流端に接続された円板部３２とによって構成されている。
傾斜部材本体３１は、円錐台形状であって、下流側の一端の内径が回転軸本体２１の外径とほぼ同等となっており、側壁１１から側壁１２に向かって漸次外径が縮径するように形成されている。そして、傾斜部材本体３１の下流側の一端が攪拌羽根２２Ａの上流側の面に接続されている。また、円板部３２は、傾斜部材本体３１の上流側の一端と回転軸本体２１とを接続するように設けられている。 The inclined member 23 includes an inclined member main body 31 provided around the rotary shaft main body 21 and a disk portion 32 connected to the upstream end of the inclined member main body 31.
The inclined member body 31 has a truncated cone shape, the inner diameter of one end on the downstream side is substantially equal to the outer diameter of the rotating shaft body 21, and the outer diameter gradually decreases from the side wall 11 toward the side wall 12. It is formed as follows. One end of the inclined member body 31 on the downstream side is connected to the upstream surface of the stirring blade 22A. Further, the disc portion 32 is provided so as to connect the upstream end of the inclined member main body 31 and the rotary shaft main body 21.

掻取羽根２４は、図２に示すように、傾斜部材２３の上流側の一端に、周方向等間隔の３箇所で回転軸３に対して放射状に設けられている。そして、掻取羽根２４は、傾斜部材２３に接続された突出板部３５と、突出板部３５に接続された掻取板部（内周面掻取部材、側壁掻取部材）３６とによって構成されている。なお、図１において、掻取羽根２４は１箇所にのみ図示されており、残りが省略されている。
突出板部３５は、傾斜部材２３の上流側の一端から径方向外方に突出して設けられた板状部材であって、回転軸３の径方向外方における一端である先端が筒状体１３の内周面と間隙を介して配置されるように形成されている。ここで、先端と筒状体１３の内周面との間隙は、例えば、１５ｍｍとなっている。
掻取板部３６は、突出板部３５から側壁１１に向けて突出するように設けられた板状部材であって、下流側の一辺が突出板部３５の回転方向前方の一辺に突出板部３５に対して屈曲するように接続されている。そして、掻取板部３６は、上流側の一辺が側壁１１と間隙を介して配置されるように形成されており、上流側の一辺が下流側の一辺よりも回転方向前方に位置し、回転方向前方側の面が回転方向に対して若干下流側を向くように配置されている。ここで、上流側の一辺と側壁１１との間隙は、例えば、２５ｍｍとなっている。これにより、回転軸３が回転して掻取板部３６によって押し出された被乾燥物は、下流側に押し流されるようになる。 As shown in FIG. 2, the scraping blades 24 are provided radially at one end on the upstream side of the inclined member 23 at three circumferentially spaced intervals with respect to the rotating shaft 3. The scraping blade 24 includes a protruding plate portion 35 connected to the inclined member 23 and a scraping plate portion (inner peripheral surface cleaning member, sidewall cleaning member) 36 connected to the protruding plate portion 35. Has been. In FIG. 1, the scraping blade 24 is shown only at one place, and the rest is omitted.
The protruding plate portion 35 is a plate-like member provided to protrude radially outward from one end on the upstream side of the inclined member 23, and the tip that is one end radially outward of the rotating shaft 3 is the tubular body 13. It is formed so that it may be arrange | positioned through the internal peripheral surface of this and a clearance gap. Here, the gap between the tip and the inner peripheral surface of the cylindrical body 13 is, for example, 15 mm.
The scraping plate portion 36 is a plate-like member provided so as to protrude from the protruding plate portion 35 toward the side wall 11, and one side on the downstream side is a protruding plate portion on one side in the rotation direction of the protruding plate portion 35. 35 to be bent. The scraping plate portion 36 is formed so that one side on the upstream side is disposed with a gap between the side wall 11, the one side on the upstream side is located forward of the one side on the downstream side in the rotation direction, and rotates. It is arranged so that the surface on the front side in the direction faces slightly downstream with respect to the rotational direction. Here, the gap between the side on the upstream side and the side wall 11 is, for example, 25 mm. Thereby, the to-be-dried material pushed out by the scraping plate portion 36 by rotating the rotating shaft 3 is pushed downstream.

掻取羽根２５は、図３に示すように、回転軸本体２１の周面に対して周方向等間隔の６箇所で、回転軸３に対して放射状に設けられている。そして、掻取羽根２５は、回転軸本体２１に接続された突出板部４１と、攪拌羽根２２Ｂに接続された突出板片部４２と、突出板部４１及び突出板片部４２を接続する接続部４３とによって構成されている。なお、図１において、掻取羽根２５は１箇所にのみ図示されており、残りが省略されている。
突出板部４１は、回転軸本体２１の周面から回転軸３の径方向外方に向けて突出するように設けられた板状部材であって、その径方向外方における端辺が接続部４３に接続されている。
突出板片部４２は、攪拌羽根２２Ｂから径方向外方に向けて突出するように設けられた板状部材であって、突出板部４１と平行となるように形成されており、その径方向外方における端辺が接続部４３に接続されている。
接続部４３は、直線状の棒状部材であって、その一端が突出板片部４２に接続されており、他端が突出板部４１よりも下流側に突出して側壁１２と間隙を介して配置されるように形成されている。そして、接続部４３は、下流側の一端が上流側の一端よりも回転方向前方に位置するように設けられている。ここで、接続部４３の他端と側壁１２との間隙は、例えば、１５ｍｍとなっている。 As shown in FIG. 3, the scraping blades 25 are provided radially with respect to the rotary shaft 3 at six locations equidistantly in the circumferential direction with respect to the peripheral surface of the rotary shaft main body 21. The scraping blade 25 is connected to the protruding plate portion 41 connected to the rotary shaft body 21, the protruding plate piece portion 42 connected to the stirring blade 22B, and the protruding plate portion 41 and the protruding plate piece portion 42. Part 43. In FIG. 1, the scraping blade 25 is illustrated only in one place, and the rest is omitted.
The protruding plate portion 41 is a plate-like member provided so as to protrude from the peripheral surface of the rotating shaft main body 21 toward the radially outer side of the rotating shaft 3, and the end side in the radially outer side is a connecting portion. 43.
The protruding plate piece 42 is a plate-like member provided so as to protrude radially outward from the stirring blade 22B, and is formed to be parallel to the protruding plate 41, and its radial direction. The outer end side is connected to the connection portion 43.
The connecting portion 43 is a linear rod-shaped member, one end of which is connected to the protruding plate piece portion 42, and the other end protrudes downstream from the protruding plate portion 41 and is disposed through the side wall 12 and a gap. It is formed to be. And the connection part 43 is provided so that one end of a downstream side may be located ahead of a rotation direction rather than the one end of an upstream side. Here, the gap between the other end of the connecting portion 43 and the side wall 12 is, for example, 15 mm.

なお、掻取羽根２５は回転軸本体２１に対して周方向等間隔で６つ形成されているが、互いが回転軸本体２１に対して反対方向に設けられた１組の掻取羽根２５は、接続部４３の突出板部４１から下流側に突出した部分に、接続部４３と回転軸本体２１の周面とを接続するように設けられた掻取板部４４を備えている。
掻取板部４４は、接続部４３から回転軸本体２１の軸心に向けて設けられており、接続部４３の下流側の一端が上流側の一端よりも回転方向前方に位置するように設けられているので、回転方向前方側の面が側壁１１を向くように傾斜して配置されることになる。これにより、回転軸３が回転して掻取板部４４によって押し出された被乾燥物は、上流側に押し流されるようになる。 Although six scraping blades 25 are formed at equal intervals in the circumferential direction with respect to the rotary shaft main body 21, a pair of scraping blades 25 provided in opposite directions with respect to the rotary shaft main body 21 are In addition, a scraping plate portion 44 provided to connect the connection portion 43 and the peripheral surface of the rotary shaft main body 21 is provided at a portion of the connection portion 43 that protrudes downstream from the protrusion plate portion 41.
The scraping plate portion 44 is provided from the connection portion 43 toward the axis of the rotary shaft main body 21, and is provided so that one end on the downstream side of the connection portion 43 is positioned forward in the rotation direction with respect to one end on the upstream side. Therefore, the surface on the front side in the rotation direction is inclined so as to face the side wall 11. Thereby, the to-be-dried material pushed out by the scraping plate portion 44 by the rotation of the rotating shaft 3 is pushed away upstream.

次に、このような構成を有する乾燥装置１を用いた被乾燥物の乾燥方法について説明する。まず、蒸気導入口２１Ａから熱媒である蒸気を回転軸本体２１内に導入する。これにより、複数の攪拌羽根２２、２２Ａ、２２Ｂは、内部を流通する蒸気によって加熱される。また、ジャケットにも熱媒として蒸気を導入することによって筒状体１３を加熱する。このとき、回転軸３を回転させる。
そして、被乾燥物導入口１３Ａから被乾燥物を供給する。供給された被乾燥物は、筒状体１３の下側の内周面上に載置され、回転軸３が回転することによって上流側から下流側に向けて送り出される。このとき、被乾燥物は、蒸気によって加熱された回転軸本体２１及び攪拌羽根２２、２２Ａ、２２Ｂや筒状体１３の内周面に被乾燥物が接触することで被乾燥物内の水分が蒸発して乾燥される。また、被乾燥物を乾燥することで被乾燥物から発生する水蒸気などは、固定体２の外部に排気される。 Next, a method for drying an object to be dried using the drying apparatus 1 having such a configuration will be described. First, steam as a heat medium is introduced into the rotary shaft body 21 from the steam inlet 21 </ b> A. Thereby, the plurality of stirring blades 22, 22A, 22B are heated by the steam flowing through the inside. Moreover, the cylindrical body 13 is heated by introducing steam into the jacket as a heat medium. At this time, the rotating shaft 3 is rotated.
Then, the material to be dried is supplied from the material to be dried inlet 13A. The supplied to-be-dried material is placed on the lower inner peripheral surface of the cylindrical body 13, and is sent out from the upstream side toward the downstream side as the rotating shaft 3 rotates. At this time, the material to be dried comes into contact with the inner surface of the rotary shaft body 21 and the stirring blades 22, 22 </ b> A, 22 </ b> B and the cylindrical body 13 heated by the steam, so that the moisture in the material to be dried is Evaporate to dry. Further, water vapor generated from the object to be dried by drying the object to be dried is exhausted to the outside of the fixed body 2.

ここで、被乾燥物が乾燥される途中で、被乾燥物の水分量によっては粘性の高い状態となることがある。そして、この状態の被乾燥物が、側壁１１や攪拌羽根２２、２２Ａに付着することがある。攪拌羽根２２に付着した被乾燥物は、筒状体１３の内周面から各攪拌羽根２２の間に向けて突出するように設けられた固定板１４によって掻き取られる。固定板１４によって掻き取られた被乾燥物は、攪拌羽根２２によって攪拌、乾燥されながら被乾燥物排出口１３Ｂに向けて移送される。
また、攪拌羽根２２Ａの側壁１１側の面に付着した被乾燥物は、攪拌羽根２２Ａと側壁１１との間に設けられた固定板１４によって掻き取られる。この固定板１４によって掻き取られた被乾燥物は、上述と同様に、攪拌羽根２２によって攪拌、乾燥されながら被乾燥物排出口１３Ｂに向けて移送される。 Here, depending on the moisture content of the material to be dried, the material to be dried may be in a highly viscous state. And the to-be-dried material of this state may adhere to the side wall 11 or the stirring blades 22 and 22A. The material to be dried attached to the stirring blades 22 is scraped off by the fixing plate 14 provided so as to protrude from the inner peripheral surface of the cylindrical body 13 toward the stirring blades 22. The material to be dried scraped off by the fixing plate 14 is transported toward the material to be dried discharge port 13B while being stirred and dried by the stirring blade 22.
In addition, the material to be dried attached to the surface on the side wall 11 side of the stirring blade 22 </ b> A is scraped off by the fixing plate 14 provided between the stirring blade 22 </ b> A and the side wall 11. The to-be-dried material scraped off by the fixing plate 14 is transferred toward the to-be-dried material discharge port 13B while being stirred and dried by the stirring blade 22 as described above.

また、側壁１１に付着した被乾燥物は、掻取羽根２４の掻取板部３６によって掻き取られる。掻取板部３６によって掻き取られた被乾燥物は、傾斜部材２３によって攪拌羽根２２Ａ方向に送り出される。そして、側壁１１に付着しなかった他の被乾燥物と同様に、攪拌羽根２２、２２Ａ、２２Ｂによって攪拌、乾燥されながら被乾燥物排出口１３Ｂに向けて移送される。ここで、掻取板部３６の下流側の一辺が上流側の一辺に対して回転方向前方に位置し、回転方向前方の面が回転方向に対して下流側を向くように形成されているため、掻取板部３６で掻き取られた被乾燥物は、下流側に向けて送り出される。
また、攪拌羽根２２、２２Ａ、２２Ｂによって攪拌、乾燥されながら移送された被乾燥物のうち、一部は被乾燥物排出口１３Ｂで排出されずに側壁１２まで移送されることがある。側壁１２まで移送された被乾燥物は、掻取羽根２５の掻取板部４４によって掻き取られる。掻取板部４４によって掻き取られた被乾燥物は、上流側に向けて送り出されて、側壁１２よりも若干上流側に位置する被乾燥物排出口１３Ｂから排出される。 Further, the material to be dried adhered to the side wall 11 is scraped off by the scraping plate portion 36 of the scraping blade 24. The material to be dried scraped by the scraping plate portion 36 is sent out in the direction of the stirring blade 22 </ b> A by the inclined member 23. Then, similarly to the other objects to be dried that have not adhered to the side wall 11, the material is transferred toward the object to be dried outlet 13B while being stirred and dried by the stirring blades 22, 22A, 22B. Here, since the downstream side of the scraping plate portion 36 is positioned forward in the rotational direction with respect to the upstream side, the surface in the rotational direction forward is directed downstream with respect to the rotational direction. The material to be dried scraped off by the scraping plate portion 36 is sent out toward the downstream side.
In addition, some of the objects to be dried that are transferred while being stirred and dried by the stirring blades 22, 22 </ b> A, and 22 </ b> B may be transferred to the side wall 12 without being discharged at the objects to be dried discharge port 13 </ b> B. The material to be dried transferred to the side wall 12 is scraped off by the scraping plate portion 44 of the scraping blade 25. The to-be-dried material scraped off by the scraping plate portion 44 is sent out toward the upstream side and discharged from the to-be-dried object discharge port 13 </ b> B located slightly upstream from the side wall 12.

このように構成された乾燥装置１よれば、第１攪拌羽根２２Ａの上流側の面に被乾燥物が付着してもこれを固定板１４で剥離することができるので、被乾燥物が第１攪拌羽根２２Ａに付着、固化して成長することを防止できる。したがって、第１攪拌羽根２２Ａと側壁１１との間に存在する被乾燥物をより容易に側壁１２に移送することができ、被乾燥物の乾燥効率を向上させることができる。
また、側壁１１や筒状体１３の下方側の内周面に被乾燥物が付着しても、これを掻取羽根２４で剥離することができる。そして、第１攪拌羽根２２Ａの上流側の面や側壁１１、筒状体１３の内周面から剥離した被乾燥物が、傾斜部材２３によって第１攪拌羽根２２Ａに向けて送り出されるので、第１攪拌羽根２２Ａと側壁１１との間に存在する被乾燥物を被乾燥物排出口１３Ｂに向けて移送させやすくなる。ここで、掻取板部３６の回転方向前方の面が側壁１２に向けて傾くように形成されているので、このことからも被乾燥物を被乾燥物排出口１３Ｂに向けて移送させやすくなる。 According to the drying apparatus 1 configured in this way, even if an object to be dried adheres to the upstream surface of the first stirring blade 22A, the object to be dried can be peeled off by the fixing plate 14. It can be prevented from growing by adhering and solidifying to the stirring blade 22A. Therefore, the material to be dried existing between the first stirring blade 22A and the side wall 11 can be more easily transferred to the side wall 12, and the drying efficiency of the material to be dried can be improved.
Further, even if an object to be dried adheres to the inner peripheral surface on the lower side of the side wall 11 or the cylindrical body 13, it can be peeled off by the scraping blade 24. And since the to-be-dried material which peeled from the upstream surface of the 1st stirring blade 22A, the side wall 11, and the inner peripheral surface of the cylindrical body 13 is sent out toward the 1st stirring blade 22A by the inclined member 23, the 1st It becomes easy to transfer the to-be-dried object existing between the stirring blade 22A and the side wall 11 toward the to-be-dried object discharge port 13B. Here, since the surface in the rotational direction of the scraping plate portion 36 is formed so as to be inclined toward the side wall 12, it is easy to transfer the material to be dried toward the material discharge port 13 </ b> B. .

なお、本発明は上記実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることができる。
例えば、上記実施形態では熱媒として蒸気を用いたが、温水など他の熱媒を用いてもよい。
また、回転軸３が攪拌羽根２２Ａと側壁１１との間に傾斜部材２３及び掻取羽根２４を備える構成となっているが、これら傾斜部材２３及び掻取羽根２４が設けられていない構成であってもよく、いずれか一方のみを備える構成であってもよい。このような構成であっても、攪拌羽根２２Ａと側壁１１との間に突出するように設けられた固定板１４によって、攪拌羽根２２Ａの上流側の面に被乾燥物が付着、固化することを防止することができる。
また、傾斜部材２３の周囲の３箇所に掻取羽根２４が設けられているが、１箇所や２箇所でもよく、４箇所以上であってもよい。さらに、掻取板部３６の回転方向前方の面を側壁１２に向けて傾くように形成しているが、側壁１２に向けて傾けずに回転方向前方の面が回転方向を向くように形成してもよい。
また、掻取板部３６が筒状体１３の内周面に付着する被乾燥物を掻き取る内周面掻取部材と、側壁１１に付着する被乾燥物を掻き取る側壁掻取部材との機能を有しているが、内周面掻取部材と側壁掻取部材とをそれぞれ別部材として設けてもよい。 In addition, this invention is not limited to the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.
For example, in the above embodiment, steam is used as the heat medium, but other heat medium such as hot water may be used.
Further, the rotary shaft 3 is configured to include the inclined member 23 and the scraping blade 24 between the stirring blade 22A and the side wall 11, but the inclined member 23 and the scraping blade 24 are not provided. It may be a structure provided only with either one. Even in this configuration, the fixing plate 14 provided so as to protrude between the stirring blade 22A and the side wall 11 adheres and solidifies the material to be dried on the upstream surface of the stirring blade 22A. Can be prevented.
Moreover, although the scraping blade | wing 24 is provided in three places around the inclination member 23, one place, two places, and four or more places may be sufficient. Further, the surface of the scraping plate portion 36 in the rotational direction is formed so as to be inclined toward the side wall 12, but is formed so that the surface in the rotational direction is directed in the rotational direction without being inclined toward the side wall 12. May be.
In addition, the scraping plate portion 36 includes an inner peripheral surface scraping member that scrapes off an object to be dried that adheres to the inner peripheral surface of the cylindrical body 13, and a side wall scraping member that scrapes off an object to be dried that adheres to the side wall 11. Although it has a function, you may provide an internal peripheral surface scraping member and a side wall scraping member as a separate member, respectively.

この発明によれば、間接乾燥法を採用した乾燥装置に関して、供給された被乾燥物が塊となって攪拌羽根に付着することを防止し、被乾燥物の乾燥効率を向上させることができ、産業上の利用可能性が認められる。   According to the present invention, with respect to a drying apparatus employing an indirect drying method, the supplied material to be dried can be prevented from becoming a lump and adhering to the stirring blade, and the drying efficiency of the material to be dried can be improved. Industrial applicability is recognized.

本発明の一実施形態における乾燥装置を示す平面図である。It is a top view which shows the drying apparatus in one Embodiment of this invention. 図１の上流側に設けられた掻取羽根を示すもので、（ａ）は斜視図、（ｂ）は正面図である。The scraping blade | wing provided in the upstream of FIG. 1 is shown, (a) is a perspective view, (b) is a front view. 図１の下流側に設けられた掻取羽根を示すもので、（ａ）は斜視図、（ｂ）は正面図である。The scraping blade | wing provided in the downstream of FIG. 1 is shown, (a) is a perspective view, (b) is a front view.

符号の説明Explanation of symbols

１ 乾燥装置
２ 固定体
３ 回転軸
１１ 側壁（一方の側壁）
１２ 側壁（他方の側壁）
１３ 筒状体
１４ 固定板
２２、２２Ｂ 攪拌羽根
２２Ａ 攪拌羽根（第１攪拌羽根）
２３ 傾斜部材
２４ 掻取羽根
３６ 掻取板部（内周面掻取部材、側壁掻取部材）
DESCRIPTION OF SYMBOLS 1 Drying device 2 Fixed body 3 Rotating shaft 11 Side wall (one side wall)
12 side wall (the other side wall)
13 Cylindrical body 14 Fixed plate 22, 22B Stirring blade 22A Stirring blade (first stirring blade)
23 inclined member 24 scraping blade 36 scraping plate part (inner peripheral surface scraping member, side wall scraping member)

Claims (5)

両端に側壁が設けられた筒状体を有する固定体と、該筒状体の軸方向に連設された複数の攪拌羽根を有して前記固定体に回転自在に挿通される回転軸とを備え、
前記筒状体内に供給された前記被乾燥物を、前記回転体の軸方向に移送しながら攪拌、乾燥させる乾燥装置において、
前記固定体が、複数の前記攪拌羽根のうち前記一方の側壁に近接して配置されている第１攪拌羽根と前記一方の側壁との間に、前記筒状体の内周面から突出する固定板が設けられていることを特徴とする乾燥装置。 A fixed body having a cylindrical body with side walls provided at both ends, and a rotating shaft rotatably inserted into the fixed body having a plurality of stirring blades connected in the axial direction of the cylindrical body. Prepared,
In the drying apparatus that stirs and dries the material to be dried supplied into the cylindrical body while being transferred in the axial direction of the rotating body,
The fixed body protrudes from the inner peripheral surface of the cylindrical body between a first stirring blade disposed in the vicinity of the one side wall of the plurality of stirring blades and the one side wall. A drying apparatus provided with a plate. 前記回転軸が、前記一方の側壁と前記第１攪拌羽根との間に傾斜部材を備え、
該傾斜部材の外形が、前記第１攪拌羽根に向けて漸次縮径するように形成されていることを特徴とする請求項１に記載の乾燥装置。 The rotating shaft includes an inclined member between the one side wall and the first stirring blade,
The drying apparatus according to claim 1, wherein an outer shape of the inclined member is formed so as to gradually decrease in diameter toward the first stirring blade. 前記回転軸が、前記筒状体の内周面に付着する前記被乾燥物を回転時に掻き取る内周面掻取部材を備え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。   3. The drying apparatus according to claim 1, wherein the rotating shaft includes an inner peripheral surface scraping member that scrapes off the object to be dried attached to the inner peripheral surface of the cylindrical body during rotation. 前記回転軸が、前記一方の側壁に付着する前記被乾燥物を回転時に掻き取る側壁掻取部材を備えることを特徴とする請求項１から３のいずれか１項に記載の乾燥装置。   4. The drying apparatus according to claim 1, wherein the rotating shaft includes a side wall scraping member that scrapes off the object to be dried attached to the one side wall during rotation. 前記側壁掻取部材が、その端辺が前記一方の側壁と間隙を介して配置される板状部材であり、
前記側壁掻取部材の前記一方の側壁側の一端が、前記他方の側壁側の一端よりも前記回転軸の回転方向前方に位置するように設けられていることを特徴とする請求項４に記載の乾燥装置。
The side wall scraping member is a plate-like member whose end is disposed with a gap between the one side wall,
The one end on the one side wall side of the side wall scraping member is provided so as to be positioned in front of one end on the other side wall side in the rotation direction of the rotation shaft. Drying equipment.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010096424A (en) * 2008-10-16 2010-04-30 Denki Kagaku Kogyo Kk Dryer
CN102635865A (en) * 2012-04-19 2012-08-15 浙江大学 Sludge drying and incinerating integrated treatment system and process thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010096424A (en) * 2008-10-16 2010-04-30 Denki Kagaku Kogyo Kk Dryer
CN102635865A (en) * 2012-04-19 2012-08-15 浙江大学 Sludge drying and incinerating integrated treatment system and process thereof
CN102635865B (en) * 2012-04-19 2013-08-14 浙江大学 Sludge drying and incinerating integrated treatment system and process thereof

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