JP2007271233A - Transport device, weir part and rotation type heat treatment device - Google Patents

Transport device, weir part and rotation type heat treatment device Download PDF

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JP2007271233A
JP2007271233A JP2006100687A JP2006100687A JP2007271233A JP 2007271233 A JP2007271233 A JP 2007271233A JP 2006100687 A JP2006100687 A JP 2006100687A JP 2006100687 A JP2006100687 A JP 2006100687A JP 2007271233 A JP2007271233 A JP 2007271233A
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transport
raw
kiln
cylindrical
main
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JP4810708B2 (en
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Hideo Mishima
秀夫 三島
Kaname Kubota
要 久保田
Hironari Inomata
寛成 猪股
Nobuo Otake
信男 大竹
Shinichi Yamada
進一 山田
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Dowa Holdings Co Ltd
Dowaホールディングス株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a mechanism for transporting powdered matter evenly and a transport device using it. <P>SOLUTION: The transport device 1 conducts heat treatment while rotating a cylindrical transport device main body 10 and transporting a raw material (a) fed from an inlet end of the transport device main body 10 to an outlet end through an inner part of the transport device main body 10. As a weir part 30 is provided halfway across the inner part of the transport device main body 10, the inner part of the transport device main body 10 is divided into an inlet area A and an outlet area B with the weir part 30 between them. The weir part 30 is equipped with a cylinder body 31 which is co-axial with the transport device main body 10 and has an outer diameter smaller than an inner diameter of the transport device main body 10 and a plurality of stepped blades 35 which is inclined in a direction opposite to the rotation direction Y of the transport device main body 10, as it goes to the material (a) transportation direction X are provided between an inner face of the transport device main body 10 and an outer face of a cylinder body 31. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は,円筒形状の搬送装置本体を回転させて,搬送装置本体の入り口端から投入された原料を,搬送装置本体の内部において出口端まで搬送する搬送装置に関する。   The present invention relates to a transport device that rotates a cylindrical transport device body and transports a raw material charged from an entrance end of the transport device body to an exit end inside the transport device body.
例えば,硫酸製造フ゜ロセスにおいて硫化鉱石を粉砕・ハ゜ルフ゜化したスラリーを培焼炉等で亜硫酸カ゛ス等を分離し,その残渣鉱石の残留硫黄分をさらに熱処理して高純度の酸化鉄を得る方法が従来行われてきた。また,亜鉛含有酸化鉄から亜鉛を分離して酸化鉄の固体還元を行う方法も提案されている(特許文献1,2参照)。   For example, a conventional method is to obtain high-purity iron oxide by separating the sulfurous acid gas etc. in the sulfuric acid production process by separating the sulfurous acid gas etc. in the calcination furnace etc. Has been done. In addition, a method of solid-reducing iron oxide by separating zinc from zinc-containing iron oxide has been proposed (see Patent Documents 1 and 2).
この場合,熱処理の工程には,一般にロータリーキルン装置が用いられる。ロータリーキルン装置では,耐熱煉瓦で内張りした鉄製の大きな円筒(キルン本体)をやや傾けて配置し,それを回転させながら,上方となるキルン本体の入り口端から原料を投入し,キルン本体の内部において出口端まで搬送しながら,原料を熱処理するようになっている。このロータリーキルン装置は,炉内の密閉性が良好で,かつ熱処理時に発生するガスの対策が容易であるといった利点がある。   In this case, a rotary kiln apparatus is generally used for the heat treatment process. In a rotary kiln device, a large iron cylinder (kiln main body) lined with heat-resistant bricks is placed at a slight angle, and while rotating it, the raw material is introduced from the upper end of the kiln main body, and the outlet is placed inside the kiln main body. The raw material is heat-treated while being transported to the end. This rotary kiln device has the advantages of good sealing inside the furnace and easy countermeasures against gas generated during heat treatment.
特開2002−241820号公報Japanese Patent Laid-Open No. 2002-241820 特開2002−241850号公報Japanese Patent Laid-Open No. 2002-241850
しかしながら,ロータリーキルン装置による熱処理の場合を例示すると,処理時間が比較的長く,また,キルン本体の入り口端から投入できる原料も限られているため,処理量をさほど多くできないという問題があった。この場合,処理量を増やそうとしてキルン本体の入り口端から原料を投入しすぎると,原料が逆流してキルン本体の入り口端から溢れ出てしまうことがあった。   However, in the case of heat treatment using a rotary kiln apparatus, the treatment time is relatively long, and the raw materials that can be introduced from the entrance end of the kiln main body are limited. In this case, if too much raw material is introduced from the entrance end of the kiln body in order to increase the processing amount, the raw material may flow backward and overflow from the kiln body entrance end.
熱処理工程を経ない場合,例えばある程度熱せられた粉体を,周囲に冷却装置を備えた回転筒体に導入し,均一な冷却をはかる場合においても,搬送途中に供給粉体により筒内が閉塞してしまい,均一な冷却を行うことが出来ないこともあり得る。   When the heat treatment process is not performed, for example, powder that has been heated to a certain degree is introduced into a rotating cylinder equipped with a cooling device around it. As a result, uniform cooling may not be possible.
これらは,粉体を供給粉体そのものにより押し出し,連続処理していることに起因しており,一旦凝集物が存在してしまう場合には,筒内に沈着し結果として閉塞してしまうこともありえる。また,上述でキルンの場合で例示したように,供給量が多すぎる場合においては,粉体同士が圧縮されて閉塞が生じ,装置の粉体供給口から逆流する可能性がある。   These are due to the fact that the powder is extruded and continuously processed by the supplied powder itself, and once agglomerates exist, they may be deposited in the cylinder and clogged as a result. It is possible. Further, as exemplified in the case of the kiln as described above, when the supply amount is too large, the powders are compressed and clogged, and may flow backward from the powder supply port of the apparatus.
そのため,従来では装置そのものの容量を大きくして,処理量を増加させることがもっとも効果的な処理量向上の手法であったが,必要処理量に応じてスケールを大きくする必要があり,投資に対する効果の面で問題が生じていた。そうした問題の解決のため,発明者らの検討では,大幅な設備投資を伴わず,単位時間当たりの処理量を増加させるには,均一な状態で粉体を搬送するための機構を備えることがもっとも適当であることに想到した。   Therefore, in the past, increasing the amount of processing by increasing the capacity of the device itself was the most effective method for improving the amount of processing, but it was necessary to increase the scale according to the required amount of processing. There was a problem in terms of effectiveness. In order to solve such problems, the inventors have studied that a mechanism for transporting powder in a uniform state should be provided in order to increase the throughput per unit time without significant capital investment. I came up with the most appropriate one.
そこで,本発明の解決すべき技術的課題としては,均一に粉体を移送するための機構の提供およびそれを用いた搬送装置の提供に定めた。   Therefore, the technical problem to be solved by the present invention is determined to provide a mechanism for uniformly transferring powder and to provide a transport device using the mechanism.
上記課題を解決するため,本発明によれば,円筒形状の搬送装置本体を回転させて,搬送装置本体の入り口端から投入された原料を,搬送装置本体の内部において出口端まで搬送する搬送装置であって,前記搬送装置本体の内部途中に堰部を設けることにより,前記搬送装置本体の内部を前記堰部を挟んで入り口領域と出口領域とに分割し,前記堰部には,前記搬送装置本体と同軸で,前記搬送装置本体の内径よりも小さい外形を有する筒体を設けると共に,前記原料の搬送方向に向かうに従い,前記搬送装置本体の回転方向と逆向きに傾斜した階段羽根を,前記搬送装置本体の内面と前記筒体の外面との間に複数設けたことを特徴とする,搬送装置が提供される。   In order to solve the above-described problems, according to the present invention, a conveying device that rotates a cylindrical conveying device main body and conveys a raw material charged from an inlet end of the conveying device main body to an outlet end inside the conveying device main body. And providing a weir part in the middle of the inside of the transfer device body to divide the inside of the transfer device body into an entrance region and an exit region with the weir part sandwiched therebetween, A cylindrical body that is coaxial with the apparatus main body and has an outer shape that is smaller than the inner diameter of the transfer apparatus main body and that is inclined in a direction opposite to the rotation direction of the transfer apparatus body as it goes in the transfer direction of the raw material, A transport device is provided, wherein a plurality of transport devices are provided between the inner surface of the transport device body and the outer surface of the cylindrical body.
この搬送装置において,前記階段羽根の入り口側は,前記原料の搬送方向に向かうに従い,前記搬送装置本体の回転方向と逆向きに傾斜した傾斜面になっていても良い。また,前記筒体の入り口側には,前記搬送方向と直交する壁面を,前記筒体の内方に向けて立設しても良い。更にまた,前記筒体の側面に開口部を設けても良い。   In this conveying apparatus, the entrance side of the staircase blade may be an inclined surface that is inclined in the direction opposite to the rotation direction of the conveying apparatus body as it goes in the conveying direction of the raw material. Further, a wall surface orthogonal to the transport direction may be erected on the inlet side of the cylinder so as to face the inside of the cylinder. Furthermore, you may provide an opening part in the side surface of the said cylinder.
また本発明によれば,円筒形状の搬送装置を回転させて,搬送装置本体の入り口端から投入された原料を,搬送装置本体の内部において出口端まで搬送しながら,熱処理する搬送装置において,前記搬送装置本体の内部途中に設けられる堰部であって,前記搬送装置本体の内径よりも小さい外形を有する筒体を備え,前記筒体の外面に,複数の階段羽根を螺旋状に取り付けたことを特徴とする,搬送装置の堰部が提供される。   According to the present invention, in the transfer device that rotates the cylindrical transfer device and heats the raw material charged from the entrance end of the transfer device main body to the outlet end inside the transfer device main body. A dam portion provided in the middle of the inside of the transport apparatus body, comprising a cylindrical body having an outer shape smaller than the inner diameter of the transport apparatus body, and a plurality of staircase blades spirally attached to the outer surface of the cylindrical body A dam portion of the transfer device is provided.
この堰部において,前記階段羽根の一端側は,前記螺旋状と同じ方向に傾斜した傾斜面になっていても良い。また,前記筒体の一端側には,前記筒体の軸方向と直交する壁面を,前記筒体の内方に向けて立設しても良い。更にまた,前記筒体の側面に開口部を設けても良い。   In this dam portion, one end side of the staircase blade may be an inclined surface inclined in the same direction as the spiral. Further, a wall surface orthogonal to the axial direction of the cylindrical body may be erected on one end side of the cylindrical body toward the inside of the cylindrical body. Furthermore, you may provide an opening part in the side surface of the said cylinder.
本発明によれば,搬送装置本体の回転に伴い,搬送装置本体内部の入り口領域にある原料を,堰部において,出口領域に強制的に搬送することができる。搬送装置本体の入り口端への原料の投入量を増やした場合でも,原料が入り口領域から出口領域に強制的に搬送されることにより,入り口領域には原料が溜まることがなく,搬送装置本体の入り口端から逆流した原料が溢れ出るといった事態を回避できる。   According to the present invention, along with the rotation of the transport apparatus body, the raw material in the entrance area inside the transport apparatus body can be forcibly transported to the exit area in the dam portion. Even when the amount of raw material input to the entrance end of the transfer device body is increased, the material is forcibly transported from the entrance area to the exit area, so that no material accumulates in the entrance area, and the It is possible to avoid a situation where the material that flows backward from the entrance end overflows.
以下,本発明の好ましい実施の形態を図面を参照して説明する。本明細書では熱処理を伴うロータリーキルン装置を例にとって説明するが,粉体を搬送する機構等に関しては,他のものの処理にも応用できうると考えられるため,本明細書に記載している機構を備える装置は,本願発明の技術的内容に包含されると考えて良い。   Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In this specification, a rotary kiln apparatus that involves heat treatment will be described as an example. However, the mechanism for conveying powder, etc. is considered to be applicable to other types of processing. The apparatus provided may be considered to be included in the technical contents of the present invention.
図1は,本発明の実施の形態にかかるロータリーキルン装置1の説明図である。図2は,このロータリーキルン装置1に設けられた堰部30の側面図であり,図3は,キルン本体10の入り口端から見た堰部30の正面図である。図4は,堰部30に設けられた階段羽根35の斜視図である。図4では,説明のため階段羽根35を一枚のみ示している。図5〜7は,階段羽根35による原料aの搬送状態の説明図であり,図5は,階段羽根35がキルン本体10の最下部に位置した状態,図6は,階段羽根35がキルン本体10内のほぼ中央の高さまで上昇した状態,図7は,入り口側への原料aの逆流が妨げられる状態,をそれぞれ示している。図8は,本発明の実施の形態にかかるロータリーキルン装置1による原料aの収納状態の説明図である。   FIG. 1 is an explanatory diagram of a rotary kiln apparatus 1 according to an embodiment of the present invention. FIG. 2 is a side view of the dam portion 30 provided in the rotary kiln device 1, and FIG. 3 is a front view of the dam portion 30 as viewed from the entrance end of the kiln body 10. FIG. 4 is a perspective view of the staircase blade 35 provided in the weir 30. In FIG. 4, only one staircase blade 35 is shown for explanation. FIGS. 5 to 7 are explanatory views of the conveying state of the raw material a by the staircase blade 35, FIG. 5 is a state where the staircase blade 35 is located at the lowermost part of the kiln body 10, and FIG. FIG. 7 shows a state in which the flow of the raw material a to the entrance side is prevented. FIG. 8 is an explanatory diagram of a storage state of the raw material a by the rotary kiln apparatus 1 according to the embodiment of the present invention.
図1に示すように,ロータリーキルン装置1は,両端が開口した円筒形状の回転可能なキルン本体10を備えている。キルン本体10は,長さ方向を横方向に向けて備えられており,内部の空洞が熱処理空間となっている。キルン本体10の内面は,耐酸性及び耐熱性を有する煉瓦などの材質によって覆われており,外面は鋼製の外壁で覆われている。   As shown in FIG. 1, the rotary kiln device 1 includes a cylindrical rotatable kiln main body 10 having both ends opened. The kiln body 10 is provided with the length direction oriented in the lateral direction, and the internal cavity is a heat treatment space. The inner surface of the kiln body 10 is covered with a material such as brick having acid resistance and heat resistance, and the outer surface is covered with a steel outer wall.
キルン本体10は,入り口端(図1では左端)が出口端(図1では右端)よりも高くなるように,やや傾けて配置されている。   The kiln main body 10 is arranged slightly inclined so that the entrance end (left end in FIG. 1) is higher than the exit end (right end in FIG. 1).
キルン本体10の入り口端には,原料aの供給ヘッダ11が取り付けてある。この供給ヘッダ11を貫通して,外部からキルン本体10の入り口端に原料aを投入する原料フィーダ12が設けられている。コンベア13によって搬送されてきた例えば硫酸製造フ゜ロセスにおいて硫化鉱石を粉砕・ハ゜ルフ゜化したスラリーを培焼炉等で亜硫酸カ゛ス等を分離し,その残渣鉱石などの原料aが,原料フィーダ12を介してキルン本体10の入り口端に適宜投入されている。   A feed header 11 for raw material a is attached to the entrance end of the kiln body 10. A raw material feeder 12 that feeds the raw material a from the outside to the entrance end of the kiln body 10 through the supply header 11 is provided. For example, in a sulfuric acid production process that has been transported by the conveyor 13, sulfite ore is pulverized and pulverized into slurry, and sulfite gas and the like are separated in a calcination furnace, etc. It is appropriately inserted into the entrance end of the main body 10.
供給ヘッダ11の上部には,供給ヘッダ11内の雰囲気を排気する排気ダクト15が接続してある。供給ヘッダ11の下部には,供給ヘッダ11内にて落下した原料aを受け取るための受け容器16が設けられている。   An exhaust duct 15 for exhausting the atmosphere in the supply header 11 is connected to the upper portion of the supply header 11. A receiving container 16 for receiving the raw material a dropped in the supply header 11 is provided below the supply header 11.
キルン本体10の出口端には,キルン本体10内にて熱処理された熱処理後の原料a’を排出させる排出ヘッダ20が取り付けてある。この排出ヘッダ20を貫通して,キルン本体10内に火炎を噴出させるバーナー21が挿入されている。   At the outlet end of the kiln body 10, a discharge header 20 for discharging the heat-treated raw material a 'heat-treated in the kiln body 10 is attached. A burner 21 is inserted through the discharge header 20 to inject a flame into the kiln body 10.
供給ヘッダ11の下部には,キルン本体10の出口端から排出された熱処理後の原料a’を受け取るためのホッパー25が設けられている。また,ホッパー25内には,原料a’に向けて冷却風を吹き込むための送風ノズル26が挿入されている。   A hopper 25 for receiving the heat-treated raw material a ′ discharged from the outlet end of the kiln main body 10 is provided below the supply header 11. In addition, a blower nozzle 26 for blowing cooling air toward the raw material a ′ is inserted in the hopper 25.
以上のようなロータリーキルン装置1では,キルン本体10を回転させることにより,原料フィーダ12からキルン本体10の入り口端に投入された原料aを,その傾きにしたがって,キルン本体10の内部を通して出口端まで搬送する。なお,図1に示すロータリーキルン装置1では,原料aの搬送方向Xは右向きであり,キルン本体10の回転方向Yは,キルン本体10の入り口端から見て反時計回転方向である(図3参照)。この搬送中に,バーナー21からキルン本体10内に噴出させた火炎の熱により,例えば不純物含有酸化鉄などの熱処理が行われる。こうして熱処理された原料a’が,キルン本体10の出口端からホッパー25に排出される。熱処理後の原料a’は,例えば硫酸製造フ゜ロセスにおいて硫化鉱石を粉砕・ハ゜ルフ゜化したスラリーを培焼炉等で亜硫酸カ゛ス等を分離し,その残渣鉱石原料aを仮焼した高純度酸化鉄などである。   In the rotary kiln apparatus 1 as described above, by rotating the kiln main body 10, the raw material a introduced from the raw material feeder 12 to the inlet end of the kiln main body 10 is passed through the inside of the kiln main body 10 to the outlet end according to the inclination. Transport. In the rotary kiln apparatus 1 shown in FIG. 1, the conveyance direction X of the raw material a is rightward, and the rotation direction Y of the kiln body 10 is a counterclockwise rotation direction when viewed from the entrance end of the kiln body 10 (see FIG. 3). ). During this transfer, heat treatment of, for example, iron oxide containing impurities is performed by the heat of the flame ejected from the burner 21 into the kiln main body 10. The heat-treated raw material a ′ is discharged from the outlet end of the kiln main body 10 to the hopper 25. The raw material a ′ after heat treatment is, for example, high-purity iron oxide obtained by pulverizing and pulverizing sulfide ore in a sulfuric acid production process, separating sulfite gas, etc. in a calcination furnace etc., and calcining the residual ore raw material a. is there.
ここで,以上のようなロータリーキルン装置1にあっては,処理量を増やそうとしてキルン本体10の入り口端から原料aを投入しすぎると,原料aが入り口端に逆流し,キルン本体10の入り口端から溢れ出てしまう。このため従来は,処理量をさほど多くできず,効率的な熱処理ができなかった。   Here, in the rotary kiln apparatus 1 as described above, if the raw material a is excessively introduced from the inlet end of the kiln main body 10 in order to increase the processing amount, the raw material a flows backward to the inlet end, and the inlet of the kiln main body 10 enters. It overflows from the edge. For this reason, conventionally, the amount of treatment could not be increased so much and efficient heat treatment could not be performed.
そこで本発明では,キルン本体10の内部途中に堰部30を設けることにより,処理量の向上をはかっている。堰部30は,キルン本体10の内部途中において,入り口端寄りに配置されている。堰部30よりも入り口側(図1では左側)が入り口領域Aになっており,堰部30よりも出口側(図1では右側)が出口領域Bになっている。これにより,キルン本体10の内部は,堰部30を挟んで入り口領域Aと出口領域Bとに分割されている。   Therefore, in the present invention, the amount of processing is improved by providing the weir 30 in the middle of the kiln body 10. The weir 30 is arranged near the entrance end in the middle of the kiln body 10. The entrance side (left side in FIG. 1) from the weir 30 is the entrance region A, and the exit side (right side in FIG. 1) from the weir 30 is the exit region B. Thereby, the inside of the kiln main body 10 is divided into an entrance area A and an exit area B with the weir 30 interposed therebetween.
堰部30には,キルン本体10の内径よりも小さい外形を有する筒体31が設けられている。この筒体31の中心軸31’とキルン本体10の中心軸10’は一致するように筒体31がキルン本体10の内部に配置されている。このように両者を同軸とすることにより,キルン本体10の内面と筒体31の間には,円筒形状の空間が形成されている。   The dam portion 30 is provided with a cylindrical body 31 having an outer shape smaller than the inner diameter of the kiln body 10. The cylinder 31 is disposed inside the kiln body 10 so that the center axis 31 ′ of the cylinder 31 and the center axis 10 ′ of the kiln body 10 coincide. Thus, by making both coaxial, a cylindrical space is formed between the inner surface of the kiln main body 10 and the cylindrical body 31.
また,こうしてキルン本体10の内面と筒体31の間に形成された円筒形状の空間には,複数の階段羽根35が装着してある。この実施の形態では,キルン本体10の内面と筒体31の間に9枚の階段羽根35が装着されている。   In addition, a plurality of stair blades 35 are mounted in the cylindrical space formed between the inner surface of the kiln body 10 and the cylinder 31 in this way. In this embodiment, nine staircase blades 35 are mounted between the inner surface of the kiln body 10 and the cylinder 31.
各階段羽根35は,筒体31の周囲において,中心軸31’を中心に互いに等しい中心角を保ちながら放射状に取り付けられている。各階段羽根35は,何れも同様の構成を有するので,図4を参照に一枚の階段羽根35の構成について説明する。   The respective stair blades 35 are attached radially around the cylindrical body 31 while maintaining the same central angle with respect to the central axis 31 ′. Since each stair blade 35 has the same configuration, the configuration of one stair blade 35 will be described with reference to FIG.
階段羽根35は,何れも筒体31の中心軸31’に対して直交する平面で形成される3つの仕切り壁40,41,42と,仕切り壁40,41の間に配置された傾斜面45,仕切り壁41,42の間に配置された水平面46,仕切り壁42の出口側に配置された水平面47とで構成されている。仕切り壁40,41,42は,筒体31の周囲において,入り口側から出口側に向かって,所定の間隔を開けて配置されており,最も入り口側にある仕切り壁40と,最も出口側にある仕切り壁42と,それら仕切り壁40と仕切り壁42のほぼ中間にある仕切り壁41からなる。   The staircase blade 35 includes three partition walls 40, 41, 42 each formed by a plane orthogonal to the central axis 31 ′ of the cylindrical body 31, and an inclined surface 45 disposed between the partition walls 40, 41. , A horizontal plane 46 disposed between the partition walls 41 and 42 and a horizontal plane 47 disposed on the outlet side of the partition wall 42. The partition walls 40, 41, 42 are arranged at a predetermined interval around the cylinder 31 from the entrance side to the exit side. The partition wall 40 on the most entrance side and the most on the exit side are arranged. The partition wall 42 includes a partition wall 42 and a partition wall 41 that is approximately in the middle between the partition wall 40 and the partition wall 42.
仕切り壁40は,図3に示すように,互いに十分な間隔を開けて放射状に取り付けられている。各仕切り壁40同志の間に形成された隙間が,キルン本体10内部の入り口領域Aにある原料aを堰部30に取り入れる取入れ口になっている。換言すれば,仕切り壁40の幅は,各仕切り壁40同志の間において十分に原料aを通過させられるように設定されている。   As shown in FIG. 3, the partition walls 40 are attached in a radial manner with a sufficient space therebetween. A gap formed between the partition walls 40 serves as an intake for taking the raw material a in the entrance area A inside the kiln body 10 into the weir 30. In other words, the width of the partition wall 40 is set so that the raw material a can be sufficiently passed between the partition walls 40.
この仕切り壁40の,キルン本体10の回転方向Yに対して後方となる端部には,傾斜面45の入り口側端部が接続されている。傾斜面45は,原料aの搬送方向Xに向かうに従い,キルン本体10の回転方向Yに対して逆向きに傾斜している。   An entrance side end portion of the inclined surface 45 is connected to an end portion of the partition wall 40 which is rearward with respect to the rotation direction Y of the kiln body 10. The inclined surface 45 is inclined in the direction opposite to the rotational direction Y of the kiln main body 10 as it goes in the conveyance direction X of the raw material a.
この傾斜面45の出口側端部には,仕切り壁41の,キルン本体10の回転方向Yに対して前方となる端部が接続されている。また,この仕切り壁41の,キルン本体10の回転方向Yに対して後方となる端部には,水平面46の入り口側端部が接続されている。これにより,傾斜面45と水平面46の間には,所定の段差が形成されている。   The outlet side end portion of the inclined surface 45 is connected to the end portion of the partition wall 41 that is forward with respect to the rotation direction Y of the kiln body 10. In addition, an end portion on the entrance side of the horizontal plane 46 is connected to an end portion of the partition wall 41 that is rearward with respect to the rotation direction Y of the kiln body 10. Thereby, a predetermined step is formed between the inclined surface 45 and the horizontal surface 46.
また,水平面46の出口側端部には,仕切り壁42の,キルン本体10の回転方向Yに対して前方となる端部が接続されている。また,この仕切り壁42の,キルン本体10の回転方向Yに対して後方となる端部には,水平面47の入り口側端部が接続されている。これにより,水平面46と水平面47の間にも,所定の段差が形成されている。   In addition, an end of the partition wall 42 that is forward with respect to the rotation direction Y of the kiln main body 10 is connected to the end of the horizontal plane 46 on the outlet side. In addition, an end portion on the entrance side of the horizontal plane 47 is connected to an end portion of the partition wall 42 that is rearward with respect to the rotation direction Y of the kiln body 10. Thereby, a predetermined step is also formed between the horizontal plane 46 and the horizontal plane 47.
このように仕切り壁40,傾斜面45,仕切り壁41,水平面46,仕切り壁42および水平面47とで構成された階段羽根35は,全体としては,原料aの搬送方向Xに向かうに従い,キルン本体10の回転方向Yに対して逆向きに傾斜した螺旋状の姿勢となっている。また,このような階段羽根35を,キルン本体10の内面と筒体31の間に形成された円筒形状の空間に複数装着したことにより,キルン本体10の内面と筒体31の間の空間に,各階段羽根35によって仕切られた複数の螺旋状の通路(原料aの搬送方向Xに向かうに従い,キルン本体10の回転方向Yに対して逆向きに傾斜した通路)が形成されている。   As described above, the staircase blade 35 composed of the partition wall 40, the inclined surface 45, the partition wall 41, the horizontal surface 46, the partition wall 42 and the horizontal surface 47 has a kiln main body as it goes toward the conveying direction X of the raw material a as a whole. It has a spiral posture inclined in the opposite direction with respect to the ten rotational directions Y. Further, by mounting a plurality of such stair blades 35 in a cylindrical space formed between the inner surface of the kiln body 10 and the cylinder 31, the space between the inner surface of the kiln body 10 and the cylinder 31 is provided. , A plurality of spiral passages (passages inclined in the direction opposite to the rotation direction Y of the kiln body 10 in the direction of conveyance of the raw material a) are formed.
また,図3に示したように,筒体31の入り口側には,原料aの搬送方向Xと直交する壁面50が,筒体31の内方に向けて立設されている。この筒体31の中心部には,原料aが通過可能な孔51が開口している。   Further, as shown in FIG. 3, a wall surface 50 orthogonal to the conveying direction X of the raw material a is erected toward the inside of the cylinder 31 at the entrance side of the cylinder 31. A hole 51 through which the raw material a can pass is opened at the center of the cylindrical body 31.
更にまた,図4に示したように,筒体31の側面には,開口部52が設けられている。この開口部52は,仕切り壁41と水平面46とで囲まれた位置に配置してある。なお,図4では,説明のため一つの階段羽根35に対応させて一つの開口部52のみを図示したが,開口部52は,階段羽根35に対応してそれぞれ設けられている。   Furthermore, as shown in FIG. 4, an opening 52 is provided on the side surface of the cylindrical body 31. The opening 52 is disposed at a position surrounded by the partition wall 41 and the horizontal plane 46. In FIG. 4, only one opening 52 is shown corresponding to one staircase blade 35 for explanation, but the opening 52 is provided corresponding to each staircase blade 35.
以上のように構成された堰部30をキルン本体10の内部途中に設けたことにより,次のような作用効果を享受できる。即ち,上述のように,ロータリーキルン装置1では,キルン本体10が回転し,原料フィーダ12からキルン本体10の入り口端に投入された原料aが,その傾きにしたがって,キルン本体10の内部を通り出口端まで搬送されるが,その途中で,堰部30において,キルン本体10内部の入り口領域Aにある原料aが,出口領域Bに強制的に搬送される。   By providing the weir 30 configured as described above in the middle of the kiln body 10, the following operational effects can be obtained. That is, as described above, in the rotary kiln apparatus 1, the kiln main body 10 rotates, and the raw material a introduced into the inlet end of the kiln main body 10 from the raw material feeder 12 passes through the inside of the kiln main body 10 according to the inclination and exits. In the middle of the transfer, the raw material a in the entrance region A inside the kiln body 10 is forcibly transported to the exit region B in the dam portion 30.
ここで,堰部30における原料aは次のように行われる。即ち,先ず,キルン本体10の回転によって階段羽根35の傾斜面45がキルン本体10の最下部(底部)に来ると,図5に示すように,入り口領域Aの底部に溜まっている原料aが,各仕切り壁40同志の間に形成された隙間(取り入れ口)を通過して傾斜面45の上側に入り込む。この場合,入り口領域Aの底部に溜まっている原料aは,自重で傾斜面45の上側に入り込むことができる。そして,このように傾斜面45の上側に入り込んだ原料aが,キルン本体10の回転に伴って,傾斜面45の上に載せられて次第に上方に持ち上げられていく。   Here, the raw material a in the weir 30 is performed as follows. That is, first, when the inclined surface 45 of the stair blade 35 comes to the lowermost part (bottom part) of the kiln body 10 by the rotation of the kiln body 10, the raw material a accumulated at the bottom part of the entrance region A as shown in FIG. , It passes through the gap (intake) formed between the partition walls 40 and enters the upper side of the inclined surface 45. In this case, the raw material a accumulated at the bottom of the entrance region A can enter the upper side of the inclined surface 45 by its own weight. The raw material a entering the upper side of the inclined surface 45 is placed on the inclined surface 45 and gradually lifted upward as the kiln body 10 rotates.
そして,階段羽根35がキルン本体10内のほぼ中央の高さまで上昇すると,図6に示すように,今まで傾斜面45の上に載っていた原料aが,傾斜面45の傾斜によって,出口側に落下し,水平面46および水平面47に順次落下し,更に出口領域Bに搬送されて行く。なお,傾斜面45の上に載っていた原料aが,傾斜面45の傾斜によって出口側に円滑に落下できるように,傾斜面45がキルン本体10内のほぼ中央の高さまで移動したときに,傾斜面45の傾斜角度θ(搬送方向Xに向かって回転方向Yと逆向きに傾斜した角度θ)が,原料aの安息角よりも大きくなるように設定されていることが望ましい。   Then, when the staircase blade 35 rises to a substantially central height in the kiln body 10, the raw material a that has been placed on the inclined surface 45 until now is brought into the outlet side by the inclination of the inclined surface 45, as shown in FIG. , And sequentially fall onto the horizontal plane 46 and the horizontal plane 47, and further conveyed to the exit area B. In addition, when the inclined surface 45 moves to the almost central height in the kiln body 10 so that the raw material a placed on the inclined surface 45 can smoothly fall to the outlet side by the inclination of the inclined surface 45, It is desirable that the inclination angle θ of the inclined surface 45 (an angle θ inclined in the direction opposite to the rotation direction Y toward the conveyance direction X) is set to be larger than the repose angle of the raw material a.
これら図5,6では,一枚の階段羽根35について説明したが,実際には,筒体31の周囲には複数枚の階段羽根35が装着されており,各階段羽根35において,同様の工程が順次行われていく。こうして,キルン本体10の内面と筒体31の間の空間において,各階段羽根35によって仕切られた複数の螺旋状の通路(原料aの搬送方向Xに向かうに従い,キルン本体10の回転方向Yに対して逆向きに傾斜した通路)を通して,キルン本体10の回転に伴って,キルン本体10内部の入り口領域Aにある原料aが,出口領域Bに強制的に搬送される。階段羽根は枚数が多い方が好ましい。好ましくは2枚以上(階段としては2段以上),より好ましくは3枚以上(3段以上)であるのがよい。   In FIGS. 5 and 6, the single staircase blade 35 has been described. Actually, however, a plurality of staircase blades 35 are mounted around the cylindrical body 31. Will be performed sequentially. In this way, in the space between the inner surface of the kiln body 10 and the cylinder 31, a plurality of spiral passages partitioned by the respective stair blades 35 (in the rotation direction Y of the kiln body 10 toward the conveying direction X of the raw material a). The material a in the entrance area A inside the kiln body 10 is forcibly conveyed to the exit area B as the kiln body 10 rotates through the passage inclined in the opposite direction. A larger number of staircase blades is preferable. The number is preferably 2 or more (2 steps or more as the stairs), more preferably 3 or more (3 or more steps).
また,このように各階段羽根35によって仕切られた複数の螺旋状の通路(原料aの搬送方向Xに向かうに従い,キルン本体10の回転方向Yに対して逆向きに傾斜した通路)を通って,入り口領域Aから出口領域Bに搬送される原料aの一部は,その途中で,筒体31の側面に形成された開口部52から筒体31の内部に落下するが,上述のように,筒体31の入り口側は壁面50で塞がれているので,孔51を超えるまでは,原料aが入り口領域Aに戻る心配はない。   Further, through a plurality of spiral passages (passages inclined in the direction opposite to the rotation direction Y of the kiln main body 10 as it goes in the conveyance direction X of the raw material a) divided by the respective stair blades 35 in this way. A part of the raw material a conveyed from the entrance area A to the exit area B falls in the middle of the cylindrical body 31 from the opening 52 formed on the side surface of the cylindrical body 31 as described above. Since the inlet side of the cylinder 31 is blocked by the wall surface 50, there is no fear that the raw material a returns to the inlet region A until the hole 51 is exceeded.
なお,キルン本体10の回転に伴って,階段羽根35が下降する際には,図7に示すように,出口領域Bの底部に溜まっている原料aが,自重で水平面47(更には,水平面46)の上側に入り込むことになる。しかしながら,水平面47の入り口側端部に接続されている仕切り壁42(更には,水平面46の入り口側端部に接続されている仕切り壁41)によって入り口側への逆流が妨げられるので,原料aが入り口領域Aに戻る心配はない。   When the stair blade 35 descends with the rotation of the kiln main body 10, as shown in FIG. 7, the raw material a accumulated at the bottom of the outlet region B is caused by its own weight in the horizontal plane 47 (and further in the horizontal plane). It will enter the upper side of 46). However, since the partition wall 42 connected to the entrance end of the horizontal plane 47 (and the partition wall 41 connected to the entrance end of the horizontal plane 46) prevents the reverse flow to the entrance side, the raw material a There is no worry of returning to the entrance area A.
こうして,堰部30において,キルン本体10内部の入り口領域Aにある原料aを出口領域Bに強制的に搬送することにより,図8に示すように,入り口領域Aでは,従来どおり原料aが所定の高さまで投入された状態を保ちつつ,出口領域Bでは,従来よりも原料aを多く収納し,比較的急な勾配で出口端に向かって下がるように表面を傾斜させた状態で原料aを収納することができるようになる。これにより,キルン本体10内部全体では従来よりも原料aを多く収納していながら,入り口領域Aでは,原料aが従来と同じ高さまでしか収納されていないので,原料aが入り口端に逆流して溢れ出るといった事態を回避できる。   In this way, the material a in the entrance region A inside the kiln body 10 is forcibly conveyed to the exit region B in the dam portion 30, so that the material a is predetermined in the entrance region A as shown in FIG. In the outlet region B, the raw material a is accommodated more than before, and the raw material a is tilted so that the surface is inclined toward the outlet end with a relatively steep slope. It can be stored. As a result, while the kiln body 10 as a whole contains more raw material a than in the conventional case, the raw material a is stored only up to the same height in the entrance region A, so the raw material a flows backward to the inlet end. You can avoid overflowing situations.
以上のように,この実施の形態にかかるロータリーキルン装置1によれば,キルン本体10の入り口端への原料aの投入量を増やした場合でも,堰部30において,原料aが入り口領域Aから出口領域Bに速やかに搬送されるので,入り口領域Aには原料aが溜まることがなく,原料aの逆流を防止しつつ,例えば不純物含有酸化鉄などの熱処理をより多くの原料aに対して行うことができる。なお,キルン本体10出口端に設けられたバーナー21の熱は,堰部30においても,キルン本体10の内面と筒体31の間の空間(各階段羽根35によって仕切られた複数の螺旋状の通路)や,壁面50に形成された孔51を通過して,入り口領域Aにまで滞りなく伝達することになる。こうして,入り口領域Aにおいても原料aの熱処理を従来と同様に行うことができる。   As described above, according to the rotary kiln apparatus 1 according to this embodiment, even when the input amount of the raw material a to the inlet end of the kiln main body 10 is increased, the raw material a exits from the inlet region A in the dam portion 30. Since the raw material a is not accumulated in the entrance region A because it is quickly conveyed to the region B, heat treatment such as iron oxide containing impurities is performed on a larger amount of the raw material a while preventing the back flow of the raw material a. be able to. The heat of the burner 21 provided at the outlet end of the kiln main body 10 is also generated in the weir 30 by the space between the inner surface of the kiln main body 10 and the cylinder 31 (a plurality of spiral-shaped partitions partitioned by the respective staircase blades 35). It passes through the passage 51) and the hole 51 formed in the wall surface 50 and is transmitted to the entrance region A without delay. Thus, in the entrance region A, the heat treatment of the raw material a can be performed in the same manner as before.
以上,本発明の好適な実施形態について説明したが,本発明はかかる例に限定されない。当業者であれば,特許請求の範囲に記載された技術的思想の範疇内において,各種の変更例または修正例に想到しうることは明らかであり,それらについても当然に本発明の技術的範囲に属するものと了解される。   The preferred embodiments of the present invention have been described above, but the present invention is not limited to such examples. It is obvious for those skilled in the art that various changes and modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs to.
以上の実施の形態では,ロータリーキルン装置1で行われる熱処理の一例として,硫酸製造フ゜ロセスにおいて硫化鉱石を粉砕・ハ゜ルフ゜化したスラリーを培焼炉等で亜硫酸カ゛ス等を分離し,その残渣鉱石原料aを仮焼する形態を説明したが,本発明は,廃棄物などの熱処理にも適用できる。   In the above embodiment, as an example of the heat treatment performed in the rotary kiln apparatus 1, the sulfide ore is pulverized and pulverized in the sulfuric acid production process, the sulfurous acid gas and the like are separated in a calcination furnace or the like, and the residual ore raw material a is removed. Although the calcination mode has been described, the present invention can also be applied to heat treatment of waste or the like.
本発明は,例えば,硫酸製造フ゜ロセスにおいて硫化鉱石を粉砕・ハ゜ルフ゜化したスラリーを培焼炉等で亜硫酸カ゛ス等を分離し,高純度酸化鉄を生成するロータリーキルン装置などに適用できる。   The present invention can be applied to, for example, a rotary kiln apparatus that generates high-purity iron oxide by separating a sulfite gas or the like from a slurry obtained by pulverizing and halving sulfide ore in a sulfuric acid production process.
本発明の実施の形態にかかるロータリーキルン装置の説明図である。It is explanatory drawing of the rotary kiln apparatus concerning embodiment of this invention. 堰部の側面図である。It is a side view of a weir part. キルン本体の入り口端から見た堰部の正面図である。It is a front view of the dam part seen from the entrance end of the kiln main body. 堰部に設けられた階段羽根の斜視図である。図4では,説明のため階段羽根を一枚のみ示している。It is a perspective view of the staircase blade provided in the weir part. In FIG. 4, only one staircase blade is shown for explanation. 階段羽根による原料の搬送状態の説明図であり,階段羽根がキルン本体の最下部に位置した状態を示している。It is explanatory drawing of the conveyance state of the raw material by a staircase blade, and the state which the staircase blade was located in the lowest part of the kiln main body is shown. 階段羽根による原料の搬送状態の説明図であり,階段羽根がキルン本体内のほぼ中央の高さまで上昇した状態を示している。It is explanatory drawing of the conveyance state of the raw material by a staircase blade, and has shown the state which the staircase blade rose to the substantially center height in a kiln main body. 階段羽根による原料の搬送状態の説明図であり,入り口側への原料の逆流が妨げられる状態を示している。It is explanatory drawing of the conveyance state of the raw material by a stair blade, and has shown the state in which the backflow of the raw material to an entrance side is prevented. 本発明の実施の形態にかかるロータリーキルン装置による原料の収納状態の説明図である。It is explanatory drawing of the accommodation state of the raw material by the rotary kiln apparatus concerning embodiment of this invention.
符号の説明Explanation of symbols
a 原料
A 入り口領域
B 出口領域
X 原料の搬送方向
Y キルン本体の回転方向
1 ロータリーキルン装置
10 キルン本体
11 供給ヘッダ
12 原料フィーダ
13 コンベア
15 排気ダクト
16 受け容器
20 排出ヘッダ
21 バーナー
25 ホッパー
26 送風ノズル
30 堰部
31 筒体
35 階段羽根
40,41,42 仕切り壁
45 傾斜面
46,47 水平面
50 壁面
51 孔
52 開口部
a Raw material
A Entrance area
B Outlet area X Raw material transfer direction Y Kiln rotation direction
1 Rotary kiln device
10 Kiln body
11 Supply header
12 Raw material feeder
13 Conveyor
15 Exhaust duct
16 Receiving container
20 Discharge header
21 Burner
25 Hopper
26 Blower nozzle
30 weir
31 cylinder
35 Stair blade
40, 41, 42 partition wall
45 Inclined surface
46, 47 horizontal plane
50 walls
51 holes
52 opening

Claims (10)

  1. 円筒形状の搬送装置本体を回転させて,搬送装置本体の入り口端から投入された原料を,搬送装置本体の内部において出口端まで搬送する装置であって,
    前記搬送装置本体の内部途中に堰部を設けることにより,前記搬送装置本体の内部を前記堰部を挟んで入り口領域と出口領域とに分割し,
    前記堰部には,前記搬送装置本体と同軸で,前記搬送装置本体の内径よりも小さい外形を有する筒体を設けると共に,
    前記原料の搬送方向に向かうに従い,前記搬送装置本体の回転方向と逆向きに傾斜した階段羽根を,前記搬送装置本体の内面と前記筒体の外面との間に複数設けたことを特徴とする,搬送装置。
    A device for rotating a cylindrical conveying device body to convey the raw material charged from the inlet end of the conveying device body to the outlet end inside the conveying device body,
    By providing a dam part in the middle of the inside of the transfer device body, the inside of the transfer device body is divided into an entrance region and an exit region with the dam part interposed therebetween,
    The dam portion is provided with a cylindrical body that is coaxial with the conveying device body and has an outer shape smaller than the inner diameter of the conveying device body,
    A plurality of stair blades that are inclined in the direction opposite to the rotation direction of the transport device main body are provided between the inner surface of the transport device main body and the outer surface of the cylindrical body in the direction of transport of the raw material. , Conveying device.
  2. 前記階段羽根の入り口側は,前記原料の搬送方向に向かうに従い,前記搬送装置本体の回転方向と逆向きに傾斜した傾斜面になっていることを特徴とする,請求項1に記載の搬送装置。 2. The transport apparatus according to claim 1, wherein the entrance side of the staircase blade has an inclined surface that is inclined in the direction opposite to the rotation direction of the transport apparatus body as it goes in the transport direction of the raw material. .
  3. 前記筒体の入り口側には,前記搬送方向と直交する壁面を,前記筒体の内方に向けて立設したことを特徴とする,請求項1または2に記載の搬送装置。 3. The transport apparatus according to claim 1, wherein a wall surface orthogonal to the transport direction is erected on an entrance side of the cylindrical body so as to face inward of the cylindrical body.
  4. 前記筒体の側面に開口部を設けたことを特徴とする,請求項1〜3のいずれかに記載の搬送装置。 4. The transport apparatus according to claim 1, wherein an opening is provided on a side surface of the cylindrical body.
  5. 円筒形状の搬送装置本体を回転させて,搬送装置本体の入り口端から投入された原料を,搬送装置本体の内部において出口端まで搬送する搬送装置において,前記搬送装置本体の内部途中に設けられる堰部であって,
    前記搬送装置本体の内径よりも小さい外形を有する筒体を備え,
    前記筒体の外面に,複数の階段羽根を螺旋状に取り付けたことを特徴とする,搬送装置の堰部。
    In a transfer device that rotates a cylindrical transfer device body and transfers the raw material charged from the entrance end of the transfer device body to the exit end inside the transfer device body, a weir provided in the transfer device body Part,
    A cylinder having an outer shape smaller than the inner diameter of the transfer device body;
    A weir portion of a transfer device, wherein a plurality of stair blades are spirally attached to the outer surface of the cylindrical body.
  6. 前記階段羽根の一端側は,前記螺旋状と同じ方向に傾斜した傾斜面になっていることを特徴とする,請求項5に記載の搬送装置の堰部。 6. The weir portion of the transfer device according to claim 5, wherein one end side of the staircase blade has an inclined surface inclined in the same direction as the spiral.
  7. 前記筒体の一端側には,前記筒体の軸方向と直交する壁面を,前記筒体の内方に向けて立設したことを特徴とする,請求項5または6に記載の搬送装置の堰部。 7. The transport device according to claim 5, wherein a wall surface orthogonal to the axial direction of the cylindrical body is erected on one end side of the cylindrical body toward the inside of the cylindrical body. Weir part.
  8. 前記筒体の側面に開口部を設けたことを特徴とする,請求項5〜7のいずれかに記載の搬送装置の堰部。 8. The weir portion of the transfer device according to claim 5, wherein an opening is provided on a side surface of the cylindrical body.
  9. 請求項5〜8のいずれかに記載の堰部であって,回転型熱処理装置などの用途に用いられるものである,堰部。 The weir part according to any one of claims 5 to 8, which is used for applications such as a rotary heat treatment apparatus.
  10. 請求項5〜8のいずれかに記載の堰部を備える,回転型熱処理装置。 A rotary heat treatment apparatus comprising the weir part according to any one of claims 5 to 8.
JP2006100687A 2006-03-31 2006-03-31 Conveying device, weir, rotary heat treatment device Expired - Fee Related JP4810708B2 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6293688U (en) * 1985-11-30 1987-06-15
JPH08110165A (en) * 1994-10-12 1996-04-30 Takasago Ind Co Ltd Device for shielding gas flow within retort of external heated type rotary kiln
JP2001355967A (en) * 2000-06-13 2001-12-26 Japan Sewage Works Agency Rotary kiln
JP2002241820A (en) * 2001-02-20 2002-08-28 Sumitomo Heavy Ind Ltd Smelting reduction method for iron oxide using rotary kiln
JP2002241850A (en) * 2001-02-20 2002-08-28 Sumitomo Heavy Ind Ltd Method for removing zinc in zinc-containing iron oxide using rotary kiln
JP2006057937A (en) * 2004-08-20 2006-03-02 Ishikawajima Harima Heavy Ind Co Ltd Rotary stoker type incinerator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6293688U (en) * 1985-11-30 1987-06-15
JPH08110165A (en) * 1994-10-12 1996-04-30 Takasago Ind Co Ltd Device for shielding gas flow within retort of external heated type rotary kiln
JP2001355967A (en) * 2000-06-13 2001-12-26 Japan Sewage Works Agency Rotary kiln
JP2002241820A (en) * 2001-02-20 2002-08-28 Sumitomo Heavy Ind Ltd Smelting reduction method for iron oxide using rotary kiln
JP2002241850A (en) * 2001-02-20 2002-08-28 Sumitomo Heavy Ind Ltd Method for removing zinc in zinc-containing iron oxide using rotary kiln
JP2006057937A (en) * 2004-08-20 2006-03-02 Ishikawajima Harima Heavy Ind Co Ltd Rotary stoker type incinerator

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