JP2008122043A - Rotary kiln furnace - Google Patents

Rotary kiln furnace Download PDF

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JP2008122043A
JP2008122043A JP2006309565A JP2006309565A JP2008122043A JP 2008122043 A JP2008122043 A JP 2008122043A JP 2006309565 A JP2006309565 A JP 2006309565A JP 2006309565 A JP2006309565 A JP 2006309565A JP 2008122043 A JP2008122043 A JP 2008122043A
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kiln
lifter
main body
rotary kiln
workpiece
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Jun Omiya
准 近江谷
Tetsuo Takubo
徹雄 田窪
Kenji Takahashi
謙治 高橋
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JFE Material Co Ltd
Sumitomo Heavy Industries Ltd
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JFE Material Co Ltd
Sumitomo Heavy Industries Ltd
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  • Muffle Furnaces And Rotary Kilns (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary kiln furnace capable of providing a desired dwell time and layer thickness of an object to be treated in a kiln body. <P>SOLUTION: The rotary kiln furnace 1 is provided with the kiln body 2 rotating around an axis, and the kiln body 2 is rotated to heat and discharge the object 4 to be treated inputted into the kiln body 2. It is composed such that a protruding lifter 12 is provided on an inner wall of the kiln body 2, and a front side face 12b in a rotating direction R front side is slanted to the rearward of a rotating direction R. By gradually lowering the object 4 to be treated until a predetermined height is reached, and not dropping the object 4 to be treated at once when the lifter 12 reaches the predetermined height, a dropping distance is shortened, a scattering amount of the object 4 to be treated is reduced, and residues of the sufficiently burned object 4 is recovered. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

本発明は、ロータリーキルン炉に関する。   The present invention relates to a rotary kiln furnace.

従来、回転するキルン本体を備え、このキルン本体の上流側に、キルン本体内に投入される被処理物を燃焼させるためのバーナーが設けられ、キルン本体の内壁に、被処理物を撹拌すると共にこの被処理物を下流側に移動させる矩形状の羽根（リフタ）が設けられるロータリーキルン炉が知られている（例えば、特許文献１参照）。
特開平１０−０５４５２３公報 Conventionally, a rotating kiln main body is provided, and a burner is provided on the upstream side of the kiln main body for burning the object to be processed, and the object to be processed is stirred on the inner wall of the kiln main body. There is known a rotary kiln furnace provided with a rectangular blade (lifter) for moving the workpiece to the downstream side (see, for example, Patent Document 1).
JP-A-10-054523

しかしながら、上記ロータリーキルン炉では、被処理物をリフタで撹拌しているにも拘らず、被処理物が十分に燃焼されずに排出されるという問題があった。   However, the rotary kiln furnace has a problem in that the object to be processed is discharged without being sufficiently burned although the object to be processed is stirred with a lifter.

本発明は、このような課題を解決するために成されたものであり、被処理物を十分に燃焼できるロータリーキルン炉を提供することを目的とする。   The present invention has been made to solve such problems, and an object of the present invention is to provide a rotary kiln furnace capable of sufficiently burning an object to be processed.

ここで、本発明者らは鋭意検討の結果、上記ロータリーキルン炉では、キルン本体のリフタが撹拌を行うべく被処理物を回転により上部まで持ち上げるため、キルン本体の上部から被処理物が一気に落下して飛散し、この飛散した被処理物が燃焼ガス及び排ガスの気流により上流側から下流側へ流され、キルン本体内で必要な滞留時間を得られないことが原因であることを突き止めた。   Here, as a result of intensive studies, the inventors of the above rotary kiln furnace lift the workpiece to the upper part by rotation so that the lifter of the kiln main body performs stirring, so that the workpiece falls from the upper part of the kiln main body at once. It was found that the scattered object to be processed was caused to flow from the upstream side to the downstream side by the flow of combustion gas and exhaust gas, and the necessary residence time could not be obtained in the kiln body.

そこで、本発明によるロータリーキルン炉は、軸回りに回転するキルン本体を備え、当該キルン本体を回転させて前記キルン本体内に投入された被処理物を加熱して排出するロータリーキルン炉において、キルン本体の内壁に突出するように設けられ、キルン本体の回転方向前側の面が回転方向後方に傾斜しているリフタを備えることを特徴とする。   Therefore, a rotary kiln furnace according to the present invention includes a kiln body that rotates about an axis, and in the rotary kiln furnace that rotates the kiln body and heats and discharges an object to be processed that is put into the kiln body. A lifter is provided so as to protrude from the inner wall, and a surface on the front side in the rotation direction of the kiln main body is inclined rearward in the rotation direction.

本発明によるロータリーキルン炉においては、キルン本体が回転すると、キルン本体内に投入された被処理物はリフタにより持ち上げられ、このリフタの回転方向前側の面の傾斜に沿って回転方向後方へ落下する。すなわち、リフタが所定の高さに達して一気に被処理物が落下するのではなく、所定の高さに達するまでに徐々に被処理物が落下するため、落下距離が短くなり、被処理物の飛散量が低減する。このため、被処理物が下流側に飛散するのを抑制することができ、キルン本体内で必要な滞留時間を得ることが可能となる。   In the rotary kiln furnace according to the present invention, when the kiln main body rotates, the workpiece to be processed put in the kiln main body is lifted by the lifter and falls backward in the rotational direction along the inclination of the front surface in the rotational direction of the lifter. In other words, the work piece does not fall at once when the lifter reaches a predetermined height, but the work piece gradually falls by the time it reaches the predetermined height. The amount of scattering is reduced. For this reason, it can suppress that a to-be-processed object scatters downstream, and it becomes possible to obtain required residence time within a kiln main body.

ここで、上記リフタは、キルン本体の軸線方向に対して傾斜するように設けられることが好ましい。このような構成を採用した場合、キルン本体に投入された被処理物はリフタの傾斜角度に応じて下流側に移動する速度が変わるため、リフタの傾斜角度を適宜設定することで、キルン本体内での滞留時間及び層厚を調整することが可能となる。   Here, the lifter is preferably provided so as to be inclined with respect to the axial direction of the kiln body. When such a configuration is adopted, the speed of movement of the workpiece thrown into the kiln body changes to the downstream side according to the tilt angle of the lifter, so by appropriately setting the tilt angle of the lifter, It is possible to adjust the residence time and the layer thickness in

この場合、上記リフタは、軸線方向に複数設けられ、キルン本体の軸線方向の位置に応じて傾斜角度が異なるように設けられることが好ましい。このような構成を採用した場合、キルン本体の軸線方向の位置に応じて被処理物の移動速度を変えることができ、各位置毎に所望の層厚に調整することが可能となる。   In this case, it is preferable that a plurality of the lifters are provided in the axial direction so that the inclination angle varies depending on the position of the kiln main body in the axial direction. When such a configuration is adopted, the moving speed of the workpiece can be changed according to the position of the kiln main body in the axial direction, and the desired layer thickness can be adjusted for each position.

このように本発明によれば、キルン本体内で被処理物の所望の滞留時間及び層厚を得られ、被処理物を十分に燃焼できるロータリーキルン炉を提供することが可能となる。   As described above, according to the present invention, it is possible to provide a rotary kiln furnace capable of obtaining a desired residence time and layer thickness of an object to be processed in the kiln body and sufficiently burning the object to be processed.

以下、本発明によるロータリーキルン炉の好適な実施形態について図面を参照しながら説明する。図１は、実施形態に係るロータリーキルン炉１を示す断面図、図２は、キルン本体２の内壁の展開図、図３は、図１におけるIII−III矢視図、図４は、リフタを示す斜視図である。   Hereinafter, preferred embodiments of a rotary kiln furnace according to the present invention will be described with reference to the drawings. 1 is a sectional view showing a rotary kiln furnace 1 according to the embodiment, FIG. 2 is a development view of an inner wall of the kiln main body 2, FIG. 3 is a view taken along arrows III-III in FIG. 1, and FIG. It is a perspective view.

図１に示すように、本実施形態にかかるロータリーキルン炉１は、水平設置面Ｚに設置された横型回転式のロータリーキルン炉であって、キルン本体２、フロントウォール３を備えている。   As shown in FIG. 1, a rotary kiln furnace 1 according to this embodiment is a horizontal rotary rotary kiln furnace installed on a horizontal installation surface Z, and includes a kiln main body 2 and a front wall 3.

キルン本体２は、回転しながら投入される被処理物４を搬送方向（軸線方向）Ｆに搬送すると共に燃焼させて排出するものである。このキルン本体２は、円筒状を呈し、その内壁５は、耐火材により内張りされている。このキルン本体２は、ベース６上に固定されて搬送方向Ｆに複数並設された支持部７により回転可能に支持されると共に、ベース６上の駆動部８を駆動源として回転される。キルン本体２は、回転軸線を傾斜させて設置されており、これにより、被処理物４を高い側（上流側）から低い側（下流側）に搬送し、燃焼残さを下流側端部に設けられた排出口９から排出させる。   The kiln body 2 conveys the workpiece 4 that is thrown in while rotating in the transport direction (axial direction) F, and burns and discharges it. The kiln body 2 has a cylindrical shape, and its inner wall 5 is lined with a refractory material. The kiln main body 2 is rotatably supported by a plurality of support portions 7 fixed on the base 6 and arranged in parallel in the transport direction F, and is rotated with the drive portion 8 on the base 6 as a drive source. The kiln main body 2 is installed with the rotation axis inclined, thereby conveying the workpiece 4 from the high side (upstream side) to the low side (downstream side) and providing the combustion residue at the downstream end. It is made to discharge from the discharged outlet 9.

フロントウォール３は、ベース６上に固定されており、キルン本体２の前部が回転可能に挿入される。このフロントウォール３には、キルン本体２内に連通し被処理物４をキルン本体２内に投入するための投入部１０が接続されている。また、フロントウォール３には、キルン本体２内に投入された被処理物４を燃焼させるためのバーナー１１が設けられており、このバーナー１１は、排出口９に向けてキルン本体２内に火炎を噴射する。なお、排出口９に対しては、図示を省略した二次燃焼室や排出物受けが接続される。   The front wall 3 is fixed on the base 6, and the front part of the kiln main body 2 is rotatably inserted. The front wall 3 is connected to the kiln main body 2 and connected to the input section 10 for inputting the workpiece 4 into the kiln main body 2. Further, the front wall 3 is provided with a burner 11 for burning the workpiece 4 put into the kiln main body 2, and this burner 11 has a flame in the kiln main body 2 toward the discharge port 9. Inject. Note that a secondary combustion chamber and an exhaust receiver (not shown) are connected to the exhaust port 9.

図１及び図２に示すように、キルン本体２の内壁５には、被処理物４を撹拌するために突出するリフタが設けられている。本実施形態では、前半部にリフタ１２が、後半部にリフタ１３がそれぞれ設けられている。これらのリフタ１２，１３は、周方向にそれぞれ複数設けられていると共に、搬送方向（軸線方向）Ｆに沿ってそれぞれ複数設けられている。各リフタ１２，１３は、上流側から下流側に向けて、搬送方向Ｆに対して回転方向Ｒ前方に傾斜するように設けられている。そして、リフタ１２は、搬送方向Ｆに対して、ここでは、３０°傾斜するように設けられ、リフタ１３は、搬送方向Ｆに対して、ここでは、１５°傾斜するように設けられている。   As shown in FIGS. 1 and 2, the inner wall 5 of the kiln main body 2 is provided with a lifter that protrudes to stir the workpiece 4. In the present embodiment, a lifter 12 is provided in the front half and a lifter 13 is provided in the rear half. A plurality of lifters 12 and 13 are provided in the circumferential direction, and a plurality of lifters 12 and 13 are provided along the transport direction (axial direction) F. The lifters 12 and 13 are provided so as to incline forward in the rotation direction R with respect to the transport direction F from the upstream side toward the downstream side. The lifter 12 is provided so as to be inclined at 30 ° with respect to the transport direction F, and the lifter 13 is provided here so as to be inclined at 15 ° with respect to the transport direction F.

図３及び図４に示すように、各リフタ１２，１３は、それぞれ横断面（その長手方向に直交する断面）台形状に形成されており、長手方向に延びる長方形に形成されてキルン本体２の内壁５に固定される底面１２ａ，１３ａと、回転方向Ｒ前側の面であって回転方向Ｒ後方に傾斜する前側面１２ｂ，１３ｂと、回転方向Ｒ後側の面であって回転方向Ｒ前方に傾斜する後側面１２ｃ，１３ｃと、底面１２ａ，１３ａより小とされた上面１２ｄ，１３ｄと、両端を閉じる台形状の端面１２ｅ，１３ｅとにより構成されている。   As shown in FIGS. 3 and 4, each of the lifters 12 and 13 is formed in a trapezoidal shape in a cross section (a cross section orthogonal to the longitudinal direction), and is formed in a rectangular shape extending in the longitudinal direction. The bottom surfaces 12a and 13a fixed to the inner wall 5, the front side surfaces 12b and 13b that are the front surfaces in the rotation direction R and are inclined rearward in the rotation direction R, and the rear surfaces in the rotation direction R and the front in the rotation direction R. The rear side surfaces 12c and 13c are inclined, the upper surfaces 12d and 13d are smaller than the bottom surfaces 12a and 13a, and trapezoidal end surfaces 12e and 13e that close both ends.

続いて、ロータリーキルン炉１の動作について説明する。まず、駆動部８を駆動してキルン本体２を軸回りに回転させ、バーナー１１から火炎を噴射させる。キルン本体２内が所定の高温状態になると、被処理物４が投入部１０を介してキルン本体２内に投入され、バーナー１１から噴射される火炎により燃焼される。そして、キルン本体２の回転に伴い、被処理物４は、リフタ１２，１３によって撹拌されながら、キルン本体２の傾斜に従って排出口９に向けて搬送される。   Next, the operation of the rotary kiln furnace 1 will be described. First, the drive unit 8 is driven to rotate the kiln body 2 around the axis, and a flame is injected from the burner 11. When the inside of the kiln main body 2 reaches a predetermined high temperature state, the workpiece 4 is put into the kiln main body 2 through the charging unit 10 and burned by the flame injected from the burner 11. As the kiln body 2 rotates, the workpiece 4 is conveyed toward the discharge port 9 according to the inclination of the kiln body 2 while being stirred by the lifters 12 and 13.

ここで、リフタ１２，１３は、上流側から下流側に向けて、搬送方向Ｆに対して回転方向Ｒ前方に傾斜するように設けられているため（図２参照）、キルン本体２の回転に従うリフタ１２，１３の回転により被処理物４の一部は上流側に押し戻され、リフタ１２，１３に対応する位置では、被処理物４の搬送速度が遅くなると共に層厚が大きくなる。更に、リフタ１３の傾斜角度よりもリフタ１２の傾斜角度の方が大きいため、リフタ１３よりもリフタ１２の方が被処理物４の一部を押し戻す力が大きくなる。このため、リフタ１３に対応する位置の被処理物４よりもリフタ１２に対応する位置の被処理物４の方が搬送速度が遅くなると共に層厚が大きくなる。ここでの被処理物４は、その燃焼特性から下流側にいて酸素との接触時間を多くとる必要がある。そのため、ここでは上流側の層厚を下流側より厚い任意の層厚、下流側の層厚を上流側より薄い任意の層厚にすることにより、最適な燃焼条件を得ることができる。このようにして、被処理物４は、リフタ１２，１３の数、位置及び傾斜角度に応じて所定の層厚が形成され、所定の滞留時間を経ながらキルン本体２内を流動し、キルン本体２の傾斜回転に従い排出口９へ向かう。   Here, the lifters 12 and 13 are provided so as to incline forward in the rotation direction R with respect to the transport direction F from the upstream side toward the downstream side (see FIG. 2), and therefore follow the rotation of the kiln body 2. Due to the rotation of the lifters 12 and 13, a part of the workpiece 4 is pushed back upstream, and at the position corresponding to the lifters 12 and 13, the conveyance speed of the workpiece 4 is decreased and the layer thickness is increased. Furthermore, since the tilt angle of the lifter 12 is larger than the tilt angle of the lifter 13, the lifter 12 has a greater force to push back part of the workpiece 4 than the lifter 13. For this reason, the to-be-processed object 4 in the position corresponding to the lifter 12 has a lower conveyance speed and a larger layer thickness than the to-be-processed object 4 in the position corresponding to the lifter 13. The to-be-processed object 4 here needs to have much contact time with oxygen in the downstream from the combustion characteristic. Therefore, optimal combustion conditions can be obtained here by setting the upstream layer thickness to an arbitrary layer thickness that is thicker than the downstream side, and the downstream layer thickness to an arbitrary layer thickness that is thinner than the upstream side. In this way, the object to be processed 4 has a predetermined layer thickness formed according to the number, position and inclination angle of the lifters 12, 13, and flows in the kiln body 2 while passing through a predetermined residence time. Follow the 2 tilt rotation toward the outlet 9.

このとき、キルン本体２内では、図５に示すように、リフタ１２，１３の前側面１２ｂ，１３ｂより回転方向Ｒ前方の被処理物４は、キルン本体２の回転に伴い、リフタ１２，１３によって持ち上げられる。そして、被処理物４は、リフタ１２，１３がキルン本体２の下部から上部に回転していく間に、前側面１２ｂの傾斜（矢印Ａ参照）に沿って徐々に落下していき、図６に示すように、リフタ１２，１３が所定の高さに達するまでに全ての被処理物４が落下し終える。従って、被処理物４の落下距離が従来に比して短くなり、被処理物４は緩やかに落下するため、落下中の飛散や落下衝撃による飛散が低減され、所定の層厚で所定の滞留時間を経て、排出口９から排出される。   At this time, in the kiln main body 2, as shown in FIG. 5, the workpiece 4 ahead in the rotation direction R from the front side surfaces 12 b and 13 b of the lifters 12 and 13 is moved along with the rotation of the kiln main body 2. Lifted by. And while the to-be-processed object 4 rotates the lifters 12 and 13 from the lower part of the kiln main body 2 to the upper part, it falls gradually along the inclination (refer arrow A) of the front side surface 12b, FIG. As shown in FIG. 4, all the objects to be processed 4 finish falling before the lifters 12 and 13 reach a predetermined height. Accordingly, the fall distance of the object to be processed 4 becomes shorter than the conventional one, and the object to be processed 4 falls gently, so that scattering during dropping and scattering due to a drop impact are reduced, and a predetermined stay is maintained with a predetermined layer thickness. After a while, it is discharged from the discharge port 9.

ここで、図７に示すように、従来技術のロータリーキルン炉２１にあっては、リフタ２３が横断面矩形状に形成されているため、キルン本体２２の回転に伴いリフタ２３の回転方向Ｒ前側の面により持ち上げられた被処理物４はなかなか落下せずに、図８に示すように、上部の所定の高さ（本実施形態の所定の高さと略同じ高さ）に達すると、一気に落下する。従って、被処理物４の落下距離が長く、落下中に飛散（図中の矢印ａ参照）すると共に落下衝撃によって飛散（図中の矢印ｂ参照）し、燃焼ガス及び排ガスの気流により下流側に流されてしまい、一部の被処理物４は、十分滞留時間が得られなくなるが、本実施形態では、これが解消されている。   Here, as shown in FIG. 7, in the rotary kiln furnace 21 of the prior art, the lifter 23 is formed in a rectangular shape in cross section. As shown in FIG. 8, the workpiece 4 lifted by the surface does not fall easily, and when it reaches a predetermined height at the upper portion (approximately the same height as the predetermined height in the present embodiment), it falls all at once. . Therefore, the fall distance of the workpiece 4 is long, and it is scattered during the fall (see arrow a in the figure) and scattered by the drop impact (see arrow b in the figure), and downstream by the airflow of combustion gas and exhaust gas. However, in this embodiment, this problem is solved, although a part of the object 4 to be processed cannot sufficiently obtain a residence time.

すなわち、本実施形態に係るロータリーキルン炉１においては、キルン本体２が回転すると、キルン本体２内に投入された被処理物４がリフタ１２，１３により持ち上げられ、このリフタ１２，１３の前側面１２ｂ，１３ｂの傾斜に沿って回転方向Ｒ後方へ落下するようにし、被処理物４を、リフタ１２，１３が所定の高さに達して一気に落下させるのではなく、所定の高さに達するまでに徐々に落下させ、落下距離を短くし飛散量を低減するようにしているため、従来技術の課題である被処理物４が下流側に飛散するのを抑制することができ、キルン本体２内で所望の滞留時間及び層厚を得ることができる。   That is, in the rotary kiln furnace 1 according to the present embodiment, when the kiln main body 2 rotates, the workpiece 4 put into the kiln main body 2 is lifted by the lifters 12 and 13, and the front side surface 12 b of the lifters 12 and 13. , 13b to fall rearward in the rotation direction R, and the workpiece 4 is not dropped at once when the lifters 12 and 13 reach a predetermined height, but before reaching the predetermined height. Since it is gradually dropped and the fall distance is shortened to reduce the amount of scattering, it is possible to prevent the object 4 to be processed, which is a problem of the prior art, from being scattered downstream, and within the kiln body 2 Desired residence time and layer thickness can be obtained.

また、本実施形態に係るロータリーキルン炉１においては、キルン本体２に投入された被処理物４はリフタ１２，１３の傾斜角度に応じて下流側に移動する速度が変わるため、リフタ１２，１３の傾斜角度を適宜設定することで、キルン本体２内における被処理物４の滞留時間及び層厚を調整することが可能となる。   Further, in the rotary kiln furnace 1 according to the present embodiment, the speed of movement of the workpiece 4 put into the kiln main body 2 is changed according to the inclination angle of the lifters 12 and 13. By appropriately setting the inclination angle, the residence time and the layer thickness of the workpiece 4 in the kiln body 2 can be adjusted.

更に、搬送方向Ｆに並設されたリフタ１２とリフタ１３を傾斜角度が異なるように設けたため、キルン本体２の軸線方向の位置に応じて被処理物４の移動速度を変えることができ、各位置毎に所定の層厚に調整することが可能となり、最適な燃焼条件を得ることができる。   Furthermore, since the lifter 12 and the lifter 13 arranged in parallel in the transport direction F are provided with different inclination angles, the moving speed of the workpiece 4 can be changed according to the position of the kiln body 2 in the axial direction. It becomes possible to adjust to a predetermined layer thickness for each position, and optimal combustion conditions can be obtained.

以上、本発明をその実施形態に基づき具体的に説明したが、本発明は上記実施形態に限定されるものではなく、例えば、上記実施形態においては、各リフタ１２，１３は、上流側から下流側に向けて、搬送方向Ｆに対して回転方向Ｒ前方に傾斜して設けるように説明したが、上流側から下流側に向けて、搬送方向Ｆに対して回転方向Ｒ後方に傾斜するように設けても良い。この場合、キルン本体が回転すると、被処理物はリフタにより下流側に押し進められるため、傾斜角度を大きくするほど搬送速度が速くなり、層厚が小さくなる。   As described above, the present invention has been specifically described based on the embodiment. However, the present invention is not limited to the above embodiment. For example, in the above embodiment, each of the lifters 12 and 13 is downstream from the upstream side. Although it has been described so as to be inclined forward in the rotational direction R with respect to the transport direction F toward the side, it is inclined rearward in the rotational direction R with respect to the transport direction F from the upstream side toward the downstream side. It may be provided. In this case, when the kiln main body rotates, the object to be processed is pushed downstream by the lifter. Therefore, the greater the inclination angle, the faster the conveyance speed and the smaller the layer thickness.

また、上記実施形態においては、キルン本体２を傾斜配置する場合について説明したが、水平配置としても良い。この場合、リフタを、上流側から下流側に向けて、搬送方向Ｆに対して回転方向Ｒ後方に傾斜するように設けることで、被処理物４を下流側に搬送できる。   Moreover, in the said embodiment, although the case where the kiln main body 2 was arrange | positioned inclined was demonstrated, it is good also as horizontal arrangement | positioning. In this case, by providing the lifter so as to be inclined rearward in the rotation direction R with respect to the transport direction F from the upstream side toward the downstream side, the workpiece 4 can be transported downstream.

次に、ロータリーキルン炉１のリフタの傾斜角度による効果を実証するために、キルン本体２内のリフタの傾斜角度を変えて、被処理物の滞留時間と層厚を計測した実施例１，２及び比較例１を説明する。   Next, in order to demonstrate the effect of the tilt angle of the lifter of the rotary kiln furnace 1, the tilt time of the lifter in the kiln main body 2 was changed to measure the residence time and the layer thickness of the workpiece, Comparative Example 1 will be described.

（実施例１）
ロータリーキルン炉及び被処理物を以下の条件とした。
キルン本体：内径６００ｍｍ×長さ１２００ｍｍ
キルン本体の回転数：０．１８ｒｐｍ
リフタ：高さ２５ｍｍ×巾２０ｍｍ×長さ１００
リフタの設置位置：上流端から４００ｍｍ
リフタの個数：周方向に１０個
リフタの設置間隔：約１８８ｍｍ
被処理物：炭素（Ｃ）及び硫黄（Ｓ）分を含む灰
被処理物の投入量：１５０ｇ／ｍｉｎ (Example 1)
The rotary kiln furnace and the object to be processed were subjected to the following conditions.
Kiln body: inner diameter 600mm x length 1200mm
Kiln body rotation speed: 0.18 rpm
Lifter: Height 25mm x Width 20mm x Length 100
Lifter installation position: 400mm from the upstream end
Number of lifters: 10 in the circumferential direction Installation interval of lifters: about 188 mm
Material to be treated: Input amount of ash material containing carbon (C) and sulfur (S): 150 g / min

また、図９に示すように、リフタの傾斜角度を、上流側から下流側に向けて、搬送方向Ｆに対して回転方向Ｒ前方に１５°傾斜するように設けた。   Further, as shown in FIG. 9, the inclination angle of the lifter is provided so as to incline 15 ° forward in the rotation direction R with respect to the transport direction F from the upstream side toward the downstream side.

（実施例２）
図１０に示すように、リフタの傾斜角度を、３０°とした点以外は実施例１と同様とした。 (Example 2)
As shown in FIG. 10, it was the same as Example 1 except that the tilt angle of the lifter was 30 °.

（比較例１）
図１１に示すように、リフタの傾斜角度を０°とした点以外は実施例１と同様とした。 (Comparative Example 1)
As shown in FIG. 11, the same procedure as in Example 1 was performed except that the tilt angle of the lifter was set to 0 °.

計測の結果、滞留時間を表１に示し、層厚を図１２に示す。表１及び図１２から明らかなように、実施例１，２のように、リフタを設けることで被処理物の滞留時間及び層厚が変化し、更に、リフタの傾斜角度に応じても、被処理物の滞留時間及び層厚が変化することが分かる。この結果に基づき、リフタの傾斜角度を適宜設定し、且つ／または、異なる傾斜角度を有するリフタを軸線方向に組み合わせることで、所望の滞留時間、層厚及び層厚の勾配を得ることが可能となる。   As a result of the measurement, the residence time is shown in Table 1, and the layer thickness is shown in FIG. As is clear from Table 1 and FIG. 12, the retention time and the layer thickness of the object to be treated are changed by providing a lifter as in Examples 1 and 2, and further, depending on the inclination angle of the lifter, It can be seen that the residence time and the layer thickness of the processed material change. Based on this result, it is possible to obtain the desired residence time, layer thickness, and layer thickness gradient by appropriately setting the lifter tilt angle and / or combining lifters having different tilt angles in the axial direction. Become.

実施形態に係るロータリーキルン炉を示す断面図である。It is sectional drawing which shows the rotary kiln furnace which concerns on embodiment. 図１に示すキルン本体の内壁の展開図である。It is an expanded view of the inner wall of the kiln main body shown in FIG. 図１におけるIII−III矢視図である。It is a III-III arrow line view in FIG. リフタを示す斜視図である。It is a perspective view which shows a lifter. キルン本体が回転したときの被処理物の第１状態を示す図である。It is a figure which shows the 1st state of a to-be-processed object when a kiln main body rotates. 図５の状態からキルン本体がさらに回転したときの被処理物の第２状態を示す図である。It is a figure which shows the 2nd state of a to-be-processed object when a kiln main body further rotates from the state of FIG. 従来技術においてキルン本体が回転したときの被処理物の第１状態を示す図である。It is a figure which shows the 1st state of a to-be-processed object when a kiln main body rotates in a prior art. 図７の状態からキルン本体がさらに回転したときの被処理物の第２状態を示す図である。It is a figure which shows the 2nd state of a to-be-processed object when a kiln main body further rotates from the state of FIG. 実施例１におけるキルン本体の内壁の展開図である。It is an expanded view of the inner wall of the kiln main body in Example 1. FIG. 実施例２におけるキルン本体の内壁の展開図である。It is an expanded view of the inner wall of the kiln main body in Example 2. FIG. 比較例におけるキルン本体の内壁の展開図である。It is an expanded view of the inner wall of the kiln main body in a comparative example. 実施例１，２及び比較例１による被処理物の層厚を示す線図である。It is a diagram which shows the layer thickness of the to-be-processed object by Examples 1, 2 and Comparative Example 1. FIG.

符号の説明Explanation of symbols

１…ロータリーキルン炉、２…キルン本体、４…被処理物、５…内壁、１２，１３…リフタ。   DESCRIPTION OF SYMBOLS 1 ... Rotary kiln furnace, 2 ... Kiln main body, 4 ... To-be-processed object, 5 ... Inner wall, 12, 13 ... Lifter.

Claims (3)

軸回りに回転するキルン本体を備え、当該キルン本体を回転させて前記キルン本体内に投入された被処理物を加熱して排出するロータリーキルン炉において、
前記キルン本体の内壁に突出するように設けられ、前記キルン本体の回転方向前側の面が前記回転方向後方に傾斜しているリフタを備えることを特徴とするロータリーキルン炉。 In a rotary kiln furnace that includes a kiln body that rotates around an axis, heats and discharges the workpiece that is put into the kiln body by rotating the kiln body,
A rotary kiln furnace comprising a lifter provided so as to protrude from an inner wall of the kiln main body, and a surface on the front side in the rotation direction of the kiln main body being inclined rearward in the rotation direction. 前記リフタは、前記キルン本体の軸線方向に対して傾斜するように設けられることを特徴とする請求項１に記載のロータリーキルン炉。   The rotary kiln furnace according to claim 1, wherein the lifter is provided to be inclined with respect to an axial direction of the kiln main body. 前記リフタは、軸線方向に複数設けられ、前記キルン本体の軸線方向の位置に応じて傾斜角度が異なるように設けられることを特徴とする請求項２に記載のロータリーキルン炉。   3. The rotary kiln furnace according to claim 2, wherein a plurality of the lifters are provided in the axial direction, and are provided such that an inclination angle varies depending on a position of the kiln main body in the axial direction.
JP2006309565A 2006-11-15 2006-11-15 Rotary kiln furnace Pending JP2008122043A (en)

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US12405060B2 (en) 2021-03-05 2025-09-02 S.A. Lhoist Recherche Et Développement Rotary kiln and method for burning carbonate-containing material, in particular limestone or dolomite
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